1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2530 lines
72 KiB
C
2530 lines
72 KiB
C
/*
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* Digital Audio (PCM) abstract layer / OSS compatible
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* Copyright (c) by Jaroslav Kysela <perex@suse.cz>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#if 0
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#define PLUGIN_DEBUG
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#endif
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#if 0
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#define OSS_DEBUG
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#endif
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#include <sound/driver.h>
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#include <linux/init.h>
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#include <linux/smp_lock.h>
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#include <linux/slab.h>
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#include <linux/time.h>
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#include <linux/vmalloc.h>
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#include <linux/moduleparam.h>
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#include <sound/core.h>
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#include <sound/minors.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include "pcm_plugin.h"
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#include <sound/info.h>
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#include <linux/soundcard.h>
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#include <sound/initval.h>
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#define OSS_ALSAEMULVER _SIOR ('M', 249, int)
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static int dsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 0};
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static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
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static int nonblock_open = 1;
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MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>, Abramo Bagnara <abramo@alsa-project.org>");
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MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
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MODULE_LICENSE("GPL");
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module_param_array(dsp_map, int, NULL, 0444);
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MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
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module_param_array(adsp_map, int, NULL, 0444);
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MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
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module_param(nonblock_open, bool, 0644);
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MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
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MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
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MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
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extern int snd_mixer_oss_ioctl_card(snd_card_t *card, unsigned int cmd, unsigned long arg);
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static int snd_pcm_oss_get_rate(snd_pcm_oss_file_t *pcm_oss_file);
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static int snd_pcm_oss_get_channels(snd_pcm_oss_file_t *pcm_oss_file);
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static int snd_pcm_oss_get_format(snd_pcm_oss_file_t *pcm_oss_file);
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static inline mm_segment_t snd_enter_user(void)
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{
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mm_segment_t fs = get_fs();
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set_fs(get_ds());
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return fs;
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}
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static inline void snd_leave_user(mm_segment_t fs)
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{
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set_fs(fs);
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}
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static int snd_pcm_oss_plugin_clear(snd_pcm_substream_t *substream)
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{
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snd_pcm_runtime_t *runtime = substream->runtime;
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snd_pcm_plugin_t *plugin, *next;
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plugin = runtime->oss.plugin_first;
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while (plugin) {
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next = plugin->next;
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snd_pcm_plugin_free(plugin);
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plugin = next;
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}
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runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
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return 0;
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}
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static int snd_pcm_plugin_insert(snd_pcm_plugin_t *plugin)
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{
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snd_pcm_runtime_t *runtime = plugin->plug->runtime;
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plugin->next = runtime->oss.plugin_first;
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plugin->prev = NULL;
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if (runtime->oss.plugin_first) {
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runtime->oss.plugin_first->prev = plugin;
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runtime->oss.plugin_first = plugin;
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} else {
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runtime->oss.plugin_last =
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runtime->oss.plugin_first = plugin;
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}
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return 0;
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}
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int snd_pcm_plugin_append(snd_pcm_plugin_t *plugin)
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{
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snd_pcm_runtime_t *runtime = plugin->plug->runtime;
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plugin->next = NULL;
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plugin->prev = runtime->oss.plugin_last;
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if (runtime->oss.plugin_last) {
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runtime->oss.plugin_last->next = plugin;
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runtime->oss.plugin_last = plugin;
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} else {
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runtime->oss.plugin_last =
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runtime->oss.plugin_first = plugin;
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}
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return 0;
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}
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static long snd_pcm_oss_bytes(snd_pcm_substream_t *substream, long frames)
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{
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snd_pcm_runtime_t *runtime = substream->runtime;
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snd_pcm_uframes_t buffer_size = snd_pcm_lib_buffer_bytes(substream);
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frames = frames_to_bytes(runtime, frames);
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if (buffer_size == runtime->oss.buffer_bytes)
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return frames;
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return (runtime->oss.buffer_bytes * frames) / buffer_size;
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}
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static long snd_pcm_alsa_frames(snd_pcm_substream_t *substream, long bytes)
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{
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snd_pcm_runtime_t *runtime = substream->runtime;
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snd_pcm_uframes_t buffer_size = snd_pcm_lib_buffer_bytes(substream);
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if (buffer_size == runtime->oss.buffer_bytes)
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return bytes_to_frames(runtime, bytes);
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return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
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}
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static int snd_pcm_oss_format_from(int format)
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{
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switch (format) {
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case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
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case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
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case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
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case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
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case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
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case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
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case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
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case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
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case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
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case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
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default: return SNDRV_PCM_FORMAT_U8;
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}
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}
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static int snd_pcm_oss_format_to(int format)
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{
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switch (format) {
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case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
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case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
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case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
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case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
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case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
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case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
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case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
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case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
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case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
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case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
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default: return -EINVAL;
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}
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}
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static int snd_pcm_oss_period_size(snd_pcm_substream_t *substream,
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snd_pcm_hw_params_t *oss_params,
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snd_pcm_hw_params_t *slave_params)
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{
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size_t s;
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size_t oss_buffer_size, oss_period_size, oss_periods;
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size_t min_period_size, max_period_size;
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snd_pcm_runtime_t *runtime = substream->runtime;
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size_t oss_frame_size;
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oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
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params_channels(oss_params) / 8;
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oss_buffer_size = snd_pcm_plug_client_size(substream,
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snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
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oss_buffer_size = 1 << ld2(oss_buffer_size);
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if (atomic_read(&runtime->mmap_count)) {
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if (oss_buffer_size > runtime->oss.mmap_bytes)
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oss_buffer_size = runtime->oss.mmap_bytes;
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}
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if (substream->oss.setup &&
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substream->oss.setup->period_size > 16)
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oss_period_size = substream->oss.setup->period_size;
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else if (runtime->oss.fragshift) {
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oss_period_size = 1 << runtime->oss.fragshift;
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if (oss_period_size > oss_buffer_size / 2)
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oss_period_size = oss_buffer_size / 2;
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} else {
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int sd;
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size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
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oss_period_size = oss_buffer_size;
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do {
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oss_period_size /= 2;
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} while (oss_period_size > bytes_per_sec);
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if (runtime->oss.subdivision == 0) {
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sd = 4;
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if (oss_period_size / sd > 4096)
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sd *= 2;
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if (oss_period_size / sd < 4096)
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sd = 1;
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} else
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sd = runtime->oss.subdivision;
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oss_period_size /= sd;
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if (oss_period_size < 16)
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oss_period_size = 16;
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}
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min_period_size = snd_pcm_plug_client_size(substream,
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snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
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min_period_size *= oss_frame_size;
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min_period_size = 1 << (ld2(min_period_size - 1) + 1);
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if (oss_period_size < min_period_size)
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oss_period_size = min_period_size;
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max_period_size = snd_pcm_plug_client_size(substream,
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snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
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max_period_size *= oss_frame_size;
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max_period_size = 1 << ld2(max_period_size);
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if (oss_period_size > max_period_size)
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oss_period_size = max_period_size;
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oss_periods = oss_buffer_size / oss_period_size;
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if (substream->oss.setup) {
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if (substream->oss.setup->periods > 1)
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oss_periods = substream->oss.setup->periods;
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}
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s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
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if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
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s = runtime->oss.maxfrags;
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if (oss_periods > s)
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oss_periods = s;
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s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
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if (s < 2)
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s = 2;
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if (oss_periods < s)
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oss_periods = s;
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while (oss_period_size * oss_periods > oss_buffer_size)
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oss_period_size /= 2;
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snd_assert(oss_period_size >= 16, return -EINVAL);
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runtime->oss.period_bytes = oss_period_size;
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runtime->oss.period_frames = 1;
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runtime->oss.periods = oss_periods;
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return 0;
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}
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static int choose_rate(snd_pcm_substream_t *substream,
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snd_pcm_hw_params_t *params, unsigned int best_rate)
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{
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snd_interval_t *it;
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snd_pcm_hw_params_t *save;
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unsigned int rate, prev;
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save = kmalloc(sizeof(*save), GFP_KERNEL);
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if (save == NULL)
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return -ENOMEM;
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*save = *params;
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it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
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/* try multiples of the best rate */
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rate = best_rate;
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for (;;) {
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if (it->max < rate || (it->max == rate && it->openmax))
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break;
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if (it->min < rate || (it->min == rate && !it->openmin)) {
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int ret;
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ret = snd_pcm_hw_param_set(substream, params,
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SNDRV_PCM_HW_PARAM_RATE,
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rate, 0);
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if (ret == (int)rate) {
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kfree(save);
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return rate;
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}
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*params = *save;
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}
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prev = rate;
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rate += best_rate;
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if (rate <= prev)
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break;
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}
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/* not found, use the nearest rate */
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kfree(save);
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return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
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}
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static int snd_pcm_oss_change_params(snd_pcm_substream_t *substream)
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{
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snd_pcm_runtime_t *runtime = substream->runtime;
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snd_pcm_hw_params_t *params, *sparams;
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snd_pcm_sw_params_t *sw_params;
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ssize_t oss_buffer_size, oss_period_size;
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size_t oss_frame_size;
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int err;
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int direct;
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int format, sformat, n;
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snd_mask_t sformat_mask;
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snd_mask_t mask;
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sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
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params = kmalloc(sizeof(*params), GFP_KERNEL);
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sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
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if (!sw_params || !params || !sparams) {
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snd_printd("No memory\n");
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err = -ENOMEM;
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goto failure;
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}
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if (atomic_read(&runtime->mmap_count)) {
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direct = 1;
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} else {
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snd_pcm_oss_setup_t *setup = substream->oss.setup;
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direct = (setup != NULL && setup->direct);
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}
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_snd_pcm_hw_params_any(sparams);
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_snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
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_snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
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snd_mask_none(&mask);
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if (atomic_read(&runtime->mmap_count))
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snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
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else {
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snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED);
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if (!direct)
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snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
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}
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err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
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if (err < 0) {
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snd_printd("No usable accesses\n");
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err = -EINVAL;
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goto failure;
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}
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choose_rate(substream, sparams, runtime->oss.rate);
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snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
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format = snd_pcm_oss_format_from(runtime->oss.format);
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|
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sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
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if (direct)
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sformat = format;
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else
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sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
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|
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if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) {
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for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) {
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if (snd_mask_test(&sformat_mask, sformat) &&
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snd_pcm_oss_format_to(sformat) >= 0)
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break;
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}
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if (sformat > SNDRV_PCM_FORMAT_LAST) {
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snd_printd("Cannot find a format!!!\n");
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err = -EINVAL;
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goto failure;
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}
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}
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err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0);
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snd_assert(err >= 0, goto failure);
|
|
|
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if (direct) {
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memcpy(params, sparams, sizeof(*params));
|
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} else {
|
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_snd_pcm_hw_params_any(params);
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_snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
|
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SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
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_snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
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snd_pcm_oss_format_from(runtime->oss.format), 0);
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_snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
|
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runtime->oss.channels, 0);
|
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_snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
|
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runtime->oss.rate, 0);
|
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pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
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params_access(params), params_format(params),
|
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params_channels(params), params_rate(params));
|
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}
|
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pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
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params_access(sparams), params_format(sparams),
|
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params_channels(sparams), params_rate(sparams));
|
|
|
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oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
|
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params_channels(params) / 8;
|
|
|
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snd_pcm_oss_plugin_clear(substream);
|
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if (!direct) {
|
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/* add necessary plugins */
|
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snd_pcm_oss_plugin_clear(substream);
|
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if ((err = snd_pcm_plug_format_plugins(substream,
|
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params,
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sparams)) < 0) {
|
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snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err);
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snd_pcm_oss_plugin_clear(substream);
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goto failure;
|
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}
|
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if (runtime->oss.plugin_first) {
|
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snd_pcm_plugin_t *plugin;
|
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if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
|
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snd_printd("snd_pcm_plugin_build_io failed: %i\n", err);
|
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snd_pcm_oss_plugin_clear(substream);
|
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goto failure;
|
|
}
|
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
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err = snd_pcm_plugin_append(plugin);
|
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} else {
|
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err = snd_pcm_plugin_insert(plugin);
|
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}
|
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if (err < 0) {
|
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snd_pcm_oss_plugin_clear(substream);
|
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goto failure;
|
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}
|
|
}
|
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}
|
|
|
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err = snd_pcm_oss_period_size(substream, params, sparams);
|
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if (err < 0)
|
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goto failure;
|
|
|
|
n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
|
|
err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
|
|
snd_assert(err >= 0, goto failure);
|
|
|
|
err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
|
|
runtime->oss.periods, NULL);
|
|
snd_assert(err >= 0, goto failure);
|
|
|
|
snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
|
|
|
|
if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
|
|
snd_printd("HW_PARAMS failed: %i\n", err);
|
|
goto failure;
|
|
}
|
|
|
|
memset(sw_params, 0, sizeof(*sw_params));
|
|
if (runtime->oss.trigger) {
|
|
sw_params->start_threshold = 1;
|
|
} else {
|
|
sw_params->start_threshold = runtime->boundary;
|
|
}
|
|
if (atomic_read(&runtime->mmap_count) || substream->stream == SNDRV_PCM_STREAM_CAPTURE)
|
|
sw_params->stop_threshold = runtime->boundary;
|
|
else
|
|
sw_params->stop_threshold = runtime->buffer_size;
|
|
sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
|
|
sw_params->period_step = 1;
|
|
sw_params->sleep_min = 0;
|
|
sw_params->avail_min = 1;
|
|
sw_params->xfer_align = 1;
|
|
if (atomic_read(&runtime->mmap_count) ||
|
|
(substream->oss.setup && substream->oss.setup->nosilence)) {
|
|
sw_params->silence_threshold = 0;
|
|
sw_params->silence_size = 0;
|
|
} else {
|
|
snd_pcm_uframes_t frames;
|
|
frames = runtime->period_size + 16;
|
|
if (frames > runtime->buffer_size)
|
|
frames = runtime->buffer_size;
|
|
sw_params->silence_threshold = frames;
|
|
sw_params->silence_size = frames;
|
|
}
|
|
|
|
if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
|
|
snd_printd("SW_PARAMS failed: %i\n", err);
|
|
goto failure;
|
|
}
|
|
|
|
runtime->oss.periods = params_periods(sparams);
|
|
oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
|
|
snd_assert(oss_period_size >= 0, err = -EINVAL; goto failure);
|
|
if (runtime->oss.plugin_first) {
|
|
err = snd_pcm_plug_alloc(substream, oss_period_size);
|
|
if (err < 0)
|
|
goto failure;
|
|
}
|
|
oss_period_size *= oss_frame_size;
|
|
|
|
oss_buffer_size = oss_period_size * runtime->oss.periods;
|
|
snd_assert(oss_buffer_size >= 0, err = -EINVAL; goto failure);
|
|
|
|
runtime->oss.period_bytes = oss_period_size;
|
|
runtime->oss.buffer_bytes = oss_buffer_size;
|
|
|
|
pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
|
|
runtime->oss.period_bytes,
|
|
runtime->oss.buffer_bytes);
|
|
pdprintf("slave: period_size = %i, buffer_size = %i\n",
|
|
params_period_size(sparams),
|
|
params_buffer_size(sparams));
|
|
|
|
runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
|
|
runtime->oss.channels = params_channels(params);
|
|
runtime->oss.rate = params_rate(params);
|
|
|
|
runtime->oss.params = 0;
|
|
runtime->oss.prepare = 1;
|
|
vfree(runtime->oss.buffer);
|
|
runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
|
|
runtime->oss.buffer_used = 0;
|
|
if (runtime->dma_area)
|
|
snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
|
|
|
|
runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
|
|
|
|
err = 0;
|
|
failure:
|
|
kfree(sw_params);
|
|
kfree(params);
|
|
kfree(sparams);
|
|
return err;
|
|
}
|
|
|
|
static int snd_pcm_oss_get_active_substream(snd_pcm_oss_file_t *pcm_oss_file, snd_pcm_substream_t **r_substream)
|
|
{
|
|
int idx, err;
|
|
snd_pcm_substream_t *asubstream = NULL, *substream;
|
|
|
|
for (idx = 0; idx < 2; idx++) {
|
|
substream = pcm_oss_file->streams[idx];
|
|
if (substream == NULL)
|
|
continue;
|
|
if (asubstream == NULL)
|
|
asubstream = substream;
|
|
if (substream->runtime->oss.params) {
|
|
err = snd_pcm_oss_change_params(substream);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
}
|
|
snd_assert(asubstream != NULL, return -EIO);
|
|
if (r_substream)
|
|
*r_substream = asubstream;
|
|
return 0;
|
|
}
|
|
|
|
static int snd_pcm_oss_prepare(snd_pcm_substream_t *substream)
|
|
{
|
|
int err;
|
|
snd_pcm_runtime_t *runtime = substream->runtime;
|
|
|
|
err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
|
|
if (err < 0) {
|
|
snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
|
|
return err;
|
|
}
|
|
runtime->oss.prepare = 0;
|
|
runtime->oss.prev_hw_ptr_interrupt = 0;
|
|
runtime->oss.period_ptr = 0;
|
|
runtime->oss.buffer_used = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int snd_pcm_oss_make_ready(snd_pcm_substream_t *substream)
|
|
{
|
|
snd_pcm_runtime_t *runtime;
|
|
int err;
|
|
|
|
if (substream == NULL)
|
|
return 0;
|
|
runtime = substream->runtime;
|
|
if (runtime->oss.params) {
|
|
err = snd_pcm_oss_change_params(substream);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
if (runtime->oss.prepare) {
|
|
err = snd_pcm_oss_prepare(substream);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int snd_pcm_oss_capture_position_fixup(snd_pcm_substream_t *substream, snd_pcm_sframes_t *delay)
|
|
{
|
|
snd_pcm_runtime_t *runtime;
|
|
snd_pcm_uframes_t frames;
|
|
int err = 0;
|
|
|
|
while (1) {
|
|
err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
|
|
if (err < 0)
|
|
break;
|
|
runtime = substream->runtime;
|
|
if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
|
|
break;
|
|
/* in case of overrun, skip whole periods like OSS/Linux driver does */
|
|
/* until avail(delay) <= buffer_size */
|
|
frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
|
|
frames /= runtime->period_size;
|
|
frames *= runtime->period_size;
|
|
err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
|
|
if (err < 0)
|
|
break;
|
|
}
|
|
return err;
|
|
}
|
|
|
|
snd_pcm_sframes_t snd_pcm_oss_write3(snd_pcm_substream_t *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
|
|
{
|
|
snd_pcm_runtime_t *runtime = substream->runtime;
|
|
int ret;
|
|
while (1) {
|
|
if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
|
|
runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
|
|
#ifdef OSS_DEBUG
|
|
if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
|
|
printk("pcm_oss: write: recovering from XRUN\n");
|
|
else
|
|
printk("pcm_oss: write: recovering from SUSPEND\n");
|
|
#endif
|
|
ret = snd_pcm_oss_prepare(substream);
|
|
if (ret < 0)
|
|
break;
|
|
}
|
|
if (in_kernel) {
|
|
mm_segment_t fs;
|
|
fs = snd_enter_user();
|
|
ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
|
|
snd_leave_user(fs);
|
|
} else {
|
|
ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
|
|
}
|
|
if (ret != -EPIPE && ret != -ESTRPIPE)
|
|
break;
|
|
/* test, if we can't store new data, because the stream */
|
|
/* has not been started */
|
|
if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
|
|
return -EAGAIN;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
snd_pcm_sframes_t snd_pcm_oss_read3(snd_pcm_substream_t *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
|
|
{
|
|
snd_pcm_runtime_t *runtime = substream->runtime;
|
|
snd_pcm_sframes_t delay;
|
|
int ret;
|
|
while (1) {
|
|
if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
|
|
runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
|
|
#ifdef OSS_DEBUG
|
|
if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
|
|
printk("pcm_oss: read: recovering from XRUN\n");
|
|
else
|
|
printk("pcm_oss: read: recovering from SUSPEND\n");
|
|
#endif
|
|
ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
|
|
if (ret < 0)
|
|
break;
|
|
} else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
|
|
ret = snd_pcm_oss_prepare(substream);
|
|
if (ret < 0)
|
|
break;
|
|
}
|
|
ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
|
|
if (ret < 0)
|
|
break;
|
|
if (in_kernel) {
|
|
mm_segment_t fs;
|
|
fs = snd_enter_user();
|
|
ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
|
|
snd_leave_user(fs);
|
|
} else {
|
|
ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
|
|
}
|
|
if (ret == -EPIPE) {
|
|
if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
|
|
ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
|
|
if (ret < 0)
|
|
break;
|
|
}
|
|
continue;
|
|
}
|
|
if (ret != -ESTRPIPE)
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
snd_pcm_sframes_t snd_pcm_oss_writev3(snd_pcm_substream_t *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
|
|
{
|
|
snd_pcm_runtime_t *runtime = substream->runtime;
|
|
int ret;
|
|
while (1) {
|
|
if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
|
|
runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
|
|
#ifdef OSS_DEBUG
|
|
if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
|
|
printk("pcm_oss: writev: recovering from XRUN\n");
|
|
else
|
|
printk("pcm_oss: writev: recovering from SUSPEND\n");
|
|
#endif
|
|
ret = snd_pcm_oss_prepare(substream);
|
|
if (ret < 0)
|
|
break;
|
|
}
|
|
if (in_kernel) {
|
|
mm_segment_t fs;
|
|
fs = snd_enter_user();
|
|
ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
|
|
snd_leave_user(fs);
|
|
} else {
|
|
ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
|
|
}
|
|
if (ret != -EPIPE && ret != -ESTRPIPE)
|
|
break;
|
|
|
|
/* test, if we can't store new data, because the stream */
|
|
/* has not been started */
|
|
if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
|
|
return -EAGAIN;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
snd_pcm_sframes_t snd_pcm_oss_readv3(snd_pcm_substream_t *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
|
|
{
|
|
snd_pcm_runtime_t *runtime = substream->runtime;
|
|
int ret;
|
|
while (1) {
|
|
if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
|
|
runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
|
|
#ifdef OSS_DEBUG
|
|
if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
|
|
printk("pcm_oss: readv: recovering from XRUN\n");
|
|
else
|
|
printk("pcm_oss: readv: recovering from SUSPEND\n");
|
|
#endif
|
|
ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
|
|
if (ret < 0)
|
|
break;
|
|
} else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
|
|
ret = snd_pcm_oss_prepare(substream);
|
|
if (ret < 0)
|
|
break;
|
|
}
|
|
if (in_kernel) {
|
|
mm_segment_t fs;
|
|
fs = snd_enter_user();
|
|
ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
|
|
snd_leave_user(fs);
|
|
} else {
|
|
ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
|
|
}
|
|
if (ret != -EPIPE && ret != -ESTRPIPE)
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t snd_pcm_oss_write2(snd_pcm_substream_t *substream, const char *buf, size_t bytes, int in_kernel)
|
|
{
|
|
snd_pcm_runtime_t *runtime = substream->runtime;
|
|
snd_pcm_sframes_t frames, frames1;
|
|
if (runtime->oss.plugin_first) {
|
|
snd_pcm_plugin_channel_t *channels;
|
|
size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
|
|
if (!in_kernel) {
|
|
if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes))
|
|
return -EFAULT;
|
|
buf = runtime->oss.buffer;
|
|
}
|
|
frames = bytes / oss_frame_bytes;
|
|
frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
|
|
if (frames1 < 0)
|
|
return frames1;
|
|
frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
|
|
if (frames1 <= 0)
|
|
return frames1;
|
|
bytes = frames1 * oss_frame_bytes;
|
|
} else {
|
|
frames = bytes_to_frames(runtime, bytes);
|
|
frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
|
|
if (frames1 <= 0)
|
|
return frames1;
|
|
bytes = frames_to_bytes(runtime, frames1);
|
|
}
|
|
return bytes;
|
|
}
|
|
|
|
static ssize_t snd_pcm_oss_write1(snd_pcm_substream_t *substream, const char __user *buf, size_t bytes)
|
|
{
|
|
size_t xfer = 0;
|
|
ssize_t tmp;
|
|
snd_pcm_runtime_t *runtime = substream->runtime;
|
|
|
|
if (atomic_read(&runtime->mmap_count))
|
|
return -ENXIO;
|
|
|
|
if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
|
|
return tmp;
|
|
while (bytes > 0) {
|
|
if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
|
|
tmp = bytes;
|
|
if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
|
|
tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
|
|
if (tmp > 0) {
|
|
if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp))
|
|
return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT;
|
|
}
|
|
runtime->oss.buffer_used += tmp;
|
|
buf += tmp;
|
|
bytes -= tmp;
|
|
xfer += tmp;
|
|
if ((substream->oss.setup != NULL && substream->oss.setup->partialfrag) ||
|
|
runtime->oss.buffer_used == runtime->oss.period_bytes) {
|
|
tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
|
|
runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
|
|
if (tmp <= 0)
|
|
return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
|
|
runtime->oss.bytes += tmp;
|
|
runtime->oss.period_ptr += tmp;
|
|
runtime->oss.period_ptr %= runtime->oss.period_bytes;
|
|
if (runtime->oss.period_ptr == 0 ||
|
|
runtime->oss.period_ptr == runtime->oss.buffer_used)
|
|
runtime->oss.buffer_used = 0;
|
|
else if ((substream->ffile->f_flags & O_NONBLOCK) != 0)
|
|
return xfer > 0 ? xfer : -EAGAIN;
|
|
}
|
|
} else {
|
|
tmp = snd_pcm_oss_write2(substream, (const char *)buf, runtime->oss.period_bytes, 0);
|
|
if (tmp <= 0)
|
|
return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
|
|
runtime->oss.bytes += tmp;
|
|
buf += tmp;
|
|
bytes -= tmp;
|
|
xfer += tmp;
|
|
if ((substream->ffile->f_flags & O_NONBLOCK) != 0 &&
|
|
tmp != runtime->oss.period_bytes)
|
|
break;
|
|
}
|
|
}
|
|
return xfer;
|
|
}
|
|
|
|
static ssize_t snd_pcm_oss_read2(snd_pcm_substream_t *substream, char *buf, size_t bytes, int in_kernel)
|
|
{
|
|
snd_pcm_runtime_t *runtime = substream->runtime;
|
|
snd_pcm_sframes_t frames, frames1;
|
|
char __user *final_dst = (char __user *)buf;
|
|
if (runtime->oss.plugin_first) {
|
|
snd_pcm_plugin_channel_t *channels;
|
|
size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
|
|
if (!in_kernel)
|
|
buf = runtime->oss.buffer;
|
|
frames = bytes / oss_frame_bytes;
|
|
frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
|
|
if (frames1 < 0)
|
|
return frames1;
|
|
frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
|
|
if (frames1 <= 0)
|
|
return frames1;
|
|
bytes = frames1 * oss_frame_bytes;
|
|
if (!in_kernel && copy_to_user(final_dst, buf, bytes))
|
|
return -EFAULT;
|
|
} else {
|
|
frames = bytes_to_frames(runtime, bytes);
|
|
frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
|
|
if (frames1 <= 0)
|
|
return frames1;
|
|
bytes = frames_to_bytes(runtime, frames1);
|
|
}
|
|
return bytes;
|
|
}
|
|
|
|
static ssize_t snd_pcm_oss_read1(snd_pcm_substream_t *substream, char __user *buf, size_t bytes)
|
|
{
|
|
size_t xfer = 0;
|
|
ssize_t tmp;
|
|
snd_pcm_runtime_t *runtime = substream->runtime;
|
|
|
|
if (atomic_read(&runtime->mmap_count))
|
|
return -ENXIO;
|
|
|
|
if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
|
|
return tmp;
|
|
while (bytes > 0) {
|
|
if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
|
|
if (runtime->oss.buffer_used == 0) {
|
|
tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
|
|
if (tmp <= 0)
|
|
return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
|
|
runtime->oss.bytes += tmp;
|
|
runtime->oss.period_ptr = tmp;
|
|
runtime->oss.buffer_used = tmp;
|
|
}
|
|
tmp = bytes;
|
|
if ((size_t) tmp > runtime->oss.buffer_used)
|
|
tmp = runtime->oss.buffer_used;
|
|
if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp))
|
|
return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT;
|
|
buf += tmp;
|
|
bytes -= tmp;
|
|
xfer += tmp;
|
|
runtime->oss.buffer_used -= tmp;
|
|
} else {
|
|
tmp = snd_pcm_oss_read2(substream, (char *)buf, runtime->oss.period_bytes, 0);
|
|
if (tmp <= 0)
|
|
return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
|
|
runtime->oss.bytes += tmp;
|
|
buf += tmp;
|
|
bytes -= tmp;
|
|
xfer += tmp;
|
|
}
|
|
}
|
|
return xfer;
|
|
}
|
|
|
|
static int snd_pcm_oss_reset(snd_pcm_oss_file_t *pcm_oss_file)
|
|
{
|
|
snd_pcm_substream_t *substream;
|
|
|
|
substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
|
|
if (substream != NULL) {
|
|
snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
|
|
substream->runtime->oss.prepare = 1;
|
|
}
|
|
substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
|
|
if (substream != NULL) {
|
|
snd_pcm_kernel_capture_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
|
|
substream->runtime->oss.prepare = 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int snd_pcm_oss_post(snd_pcm_oss_file_t *pcm_oss_file)
|
|
{
|
|
snd_pcm_substream_t *substream;
|
|
int err;
|
|
|
|
substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
|
|
if (substream != NULL) {
|
|
if ((err = snd_pcm_oss_make_ready(substream)) < 0)
|
|
return err;
|
|
snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
|
|
}
|
|
/* note: all errors from the start action are ignored */
|
|
/* OSS apps do not know, how to handle them */
|
|
return 0;
|
|
}
|
|
|
|
static int snd_pcm_oss_sync1(snd_pcm_substream_t *substream, size_t size)
|
|
{
|
|
snd_pcm_runtime_t *runtime;
|
|
ssize_t result = 0;
|
|
long res;
|
|
wait_queue_t wait;
|
|
|
|
runtime = substream->runtime;
|
|
init_waitqueue_entry(&wait, current);
|
|
add_wait_queue(&runtime->sleep, &wait);
|
|
#ifdef OSS_DEBUG
|
|
printk("sync1: size = %li\n", size);
|
|
#endif
|
|
while (1) {
|
|
result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
|
|
if (result > 0) {
|
|
runtime->oss.buffer_used = 0;
|
|
result = 0;
|
|
break;
|
|
}
|
|
if (result != 0 && result != -EAGAIN)
|
|
break;
|
|
result = 0;
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
snd_pcm_stream_lock_irq(substream);
|
|
res = runtime->status->state;
|
|
snd_pcm_stream_unlock_irq(substream);
|
|
if (res != SNDRV_PCM_STATE_RUNNING) {
|
|
set_current_state(TASK_RUNNING);
|
|
break;
|
|
}
|
|
res = schedule_timeout(10 * HZ);
|
|
if (signal_pending(current)) {
|
|
result = -ERESTARTSYS;
|
|
break;
|
|
}
|
|
if (res == 0) {
|
|
snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
|
|
result = -EIO;
|
|
break;
|
|
}
|
|
}
|
|
remove_wait_queue(&runtime->sleep, &wait);
|
|
return result;
|
|
}
|
|
|
|
static int snd_pcm_oss_sync(snd_pcm_oss_file_t *pcm_oss_file)
|
|
{
|
|
int err = 0;
|
|
unsigned int saved_f_flags;
|
|
snd_pcm_substream_t *substream;
|
|
snd_pcm_runtime_t *runtime;
|
|
snd_pcm_format_t format;
|
|
unsigned long width;
|
|
size_t size;
|
|
|
|
substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
|
|
if (substream != NULL) {
|
|
runtime = substream->runtime;
|
|
if (atomic_read(&runtime->mmap_count))
|
|
goto __direct;
|
|
if ((err = snd_pcm_oss_make_ready(substream)) < 0)
|
|
return err;
|
|
format = snd_pcm_oss_format_from(runtime->oss.format);
|
|
width = snd_pcm_format_physical_width(format);
|
|
if (runtime->oss.buffer_used > 0) {
|
|
#ifdef OSS_DEBUG
|
|
printk("sync: buffer_used\n");
|
|
#endif
|
|
size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
|
|
snd_pcm_format_set_silence(format,
|
|
runtime->oss.buffer + runtime->oss.buffer_used,
|
|
size);
|
|
err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
|
|
if (err < 0)
|
|
return err;
|
|
} else if (runtime->oss.period_ptr > 0) {
|
|
#ifdef OSS_DEBUG
|
|
printk("sync: period_ptr\n");
|
|
#endif
|
|
size = runtime->oss.period_bytes - runtime->oss.period_ptr;
|
|
snd_pcm_format_set_silence(format,
|
|
runtime->oss.buffer,
|
|
size * 8 / width);
|
|
err = snd_pcm_oss_sync1(substream, size);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
/*
|
|
* The ALSA's period might be a bit large than OSS one.
|
|
* Fill the remain portion of ALSA period with zeros.
|
|
*/
|
|
size = runtime->control->appl_ptr % runtime->period_size;
|
|
if (size > 0) {
|
|
size = runtime->period_size - size;
|
|
if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
|
|
size = (runtime->frame_bits * size) / 8;
|
|
while (size > 0) {
|
|
mm_segment_t fs;
|
|
size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
|
|
size -= size1;
|
|
size1 *= 8;
|
|
size1 /= runtime->sample_bits;
|
|
snd_pcm_format_set_silence(runtime->format,
|
|
runtime->oss.buffer,
|
|
size1);
|
|
fs = snd_enter_user();
|
|
snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1);
|
|
snd_leave_user(fs);
|
|
}
|
|
} else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
|
|
void __user *buffers[runtime->channels];
|
|
memset(buffers, 0, runtime->channels * sizeof(void *));
|
|
snd_pcm_lib_writev(substream, buffers, size);
|
|
}
|
|
}
|
|
/*
|
|
* finish sync: drain the buffer
|
|
*/
|
|
__direct:
|
|
saved_f_flags = substream->ffile->f_flags;
|
|
substream->ffile->f_flags &= ~O_NONBLOCK;
|
|
err = snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
|
|
substream->ffile->f_flags = saved_f_flags;
|
|
if (err < 0)
|
|
return err;
|
|
runtime->oss.prepare = 1;
|
|
}
|
|
|
|
substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
|
|
if (substream != NULL) {
|
|
if ((err = snd_pcm_oss_make_ready(substream)) < 0)
|
|
return err;
|
|
runtime = substream->runtime;
|
|
err = snd_pcm_kernel_capture_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
|
|
if (err < 0)
|
|
return err;
|
|
runtime->oss.buffer_used = 0;
|
|
runtime->oss.prepare = 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int snd_pcm_oss_set_rate(snd_pcm_oss_file_t *pcm_oss_file, int rate)
|
|
{
|
|
int idx;
|
|
|
|
for (idx = 1; idx >= 0; --idx) {
|
|
snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
|
|
snd_pcm_runtime_t *runtime;
|
|
if (substream == NULL)
|
|
continue;
|
|
runtime = substream->runtime;
|
|
if (rate < 1000)
|
|
rate = 1000;
|
|
else if (rate > 192000)
|
|
rate = 192000;
|
|
if (runtime->oss.rate != rate) {
|
|
runtime->oss.params = 1;
|
|
runtime->oss.rate = rate;
|
|
}
|
|
}
|
|
return snd_pcm_oss_get_rate(pcm_oss_file);
|
|
}
|
|
|
|
static int snd_pcm_oss_get_rate(snd_pcm_oss_file_t *pcm_oss_file)
|
|
{
|
|
snd_pcm_substream_t *substream;
|
|
int err;
|
|
|
|
if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
|
|
return err;
|
|
return substream->runtime->oss.rate;
|
|
}
|
|
|
|
static int snd_pcm_oss_set_channels(snd_pcm_oss_file_t *pcm_oss_file, unsigned int channels)
|
|
{
|
|
int idx;
|
|
if (channels < 1)
|
|
channels = 1;
|
|
if (channels > 128)
|
|
return -EINVAL;
|
|
for (idx = 1; idx >= 0; --idx) {
|
|
snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
|
|
snd_pcm_runtime_t *runtime;
|
|
if (substream == NULL)
|
|
continue;
|
|
runtime = substream->runtime;
|
|
if (runtime->oss.channels != channels) {
|
|
runtime->oss.params = 1;
|
|
runtime->oss.channels = channels;
|
|
}
|
|
}
|
|
return snd_pcm_oss_get_channels(pcm_oss_file);
|
|
}
|
|
|
|
static int snd_pcm_oss_get_channels(snd_pcm_oss_file_t *pcm_oss_file)
|
|
{
|
|
snd_pcm_substream_t *substream;
|
|
int err;
|
|
|
|
if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
|
|
return err;
|
|
return substream->runtime->oss.channels;
|
|
}
|
|
|
|
static int snd_pcm_oss_get_block_size(snd_pcm_oss_file_t *pcm_oss_file)
|
|
{
|
|
snd_pcm_substream_t *substream;
|
|
int err;
|
|
|
|
if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
|
|
return err;
|
|
return substream->runtime->oss.period_bytes;
|
|
}
|
|
|
|
static int snd_pcm_oss_get_formats(snd_pcm_oss_file_t *pcm_oss_file)
|
|
{
|
|
snd_pcm_substream_t *substream;
|
|
int err;
|
|
int direct;
|
|
snd_pcm_hw_params_t *params;
|
|
unsigned int formats = 0;
|
|
snd_mask_t format_mask;
|
|
int fmt;
|
|
|
|
if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
|
|
return err;
|
|
if (atomic_read(&substream->runtime->mmap_count)) {
|
|
direct = 1;
|
|
} else {
|
|
snd_pcm_oss_setup_t *setup = substream->oss.setup;
|
|
direct = (setup != NULL && setup->direct);
|
|
}
|
|
if (!direct)
|
|
return AFMT_MU_LAW | AFMT_U8 |
|
|
AFMT_S16_LE | AFMT_S16_BE |
|
|
AFMT_S8 | AFMT_U16_LE |
|
|
AFMT_U16_BE;
|
|
params = kmalloc(sizeof(*params), GFP_KERNEL);
|
|
if (!params)
|
|
return -ENOMEM;
|
|
_snd_pcm_hw_params_any(params);
|
|
err = snd_pcm_hw_refine(substream, params);
|
|
format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
|
|
kfree(params);
|
|
snd_assert(err >= 0, return err);
|
|
for (fmt = 0; fmt < 32; ++fmt) {
|
|
if (snd_mask_test(&format_mask, fmt)) {
|
|
int f = snd_pcm_oss_format_to(fmt);
|
|
if (f >= 0)
|
|
formats |= f;
|
|
}
|
|
}
|
|
return formats;
|
|
}
|
|
|
|
static int snd_pcm_oss_set_format(snd_pcm_oss_file_t *pcm_oss_file, int format)
|
|
{
|
|
int formats, idx;
|
|
|
|
if (format != AFMT_QUERY) {
|
|
formats = snd_pcm_oss_get_formats(pcm_oss_file);
|
|
if (!(formats & format))
|
|
format = AFMT_U8;
|
|
for (idx = 1; idx >= 0; --idx) {
|
|
snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
|
|
snd_pcm_runtime_t *runtime;
|
|
if (substream == NULL)
|
|
continue;
|
|
runtime = substream->runtime;
|
|
if (runtime->oss.format != format) {
|
|
runtime->oss.params = 1;
|
|
runtime->oss.format = format;
|
|
}
|
|
}
|
|
}
|
|
return snd_pcm_oss_get_format(pcm_oss_file);
|
|
}
|
|
|
|
static int snd_pcm_oss_get_format(snd_pcm_oss_file_t *pcm_oss_file)
|
|
{
|
|
snd_pcm_substream_t *substream;
|
|
int err;
|
|
|
|
if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
|
|
return err;
|
|
return substream->runtime->oss.format;
|
|
}
|
|
|
|
static int snd_pcm_oss_set_subdivide1(snd_pcm_substream_t *substream, int subdivide)
|
|
{
|
|
snd_pcm_runtime_t *runtime;
|
|
|
|
if (substream == NULL)
|
|
return 0;
|
|
runtime = substream->runtime;
|
|
if (subdivide == 0) {
|
|
subdivide = runtime->oss.subdivision;
|
|
if (subdivide == 0)
|
|
subdivide = 1;
|
|
return subdivide;
|
|
}
|
|
if (runtime->oss.subdivision || runtime->oss.fragshift)
|
|
return -EINVAL;
|
|
if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
|
|
subdivide != 8 && subdivide != 16)
|
|
return -EINVAL;
|
|
runtime->oss.subdivision = subdivide;
|
|
runtime->oss.params = 1;
|
|
return subdivide;
|
|
}
|
|
|
|
static int snd_pcm_oss_set_subdivide(snd_pcm_oss_file_t *pcm_oss_file, int subdivide)
|
|
{
|
|
int err = -EINVAL, idx;
|
|
|
|
for (idx = 1; idx >= 0; --idx) {
|
|
snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
|
|
if (substream == NULL)
|
|
continue;
|
|
if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
|
|
return err;
|
|
}
|
|
return err;
|
|
}
|
|
|
|
static int snd_pcm_oss_set_fragment1(snd_pcm_substream_t *substream, unsigned int val)
|
|
{
|
|
snd_pcm_runtime_t *runtime;
|
|
|
|
if (substream == NULL)
|
|
return 0;
|
|
runtime = substream->runtime;
|
|
if (runtime->oss.subdivision || runtime->oss.fragshift)
|
|
return -EINVAL;
|
|
runtime->oss.fragshift = val & 0xffff;
|
|
runtime->oss.maxfrags = (val >> 16) & 0xffff;
|
|
if (runtime->oss.fragshift < 4) /* < 16 */
|
|
runtime->oss.fragshift = 4;
|
|
if (runtime->oss.maxfrags < 2)
|
|
runtime->oss.maxfrags = 2;
|
|
runtime->oss.params = 1;
|
|
return 0;
|
|
}
|
|
|
|
static int snd_pcm_oss_set_fragment(snd_pcm_oss_file_t *pcm_oss_file, unsigned int val)
|
|
{
|
|
int err = -EINVAL, idx;
|
|
|
|
for (idx = 1; idx >= 0; --idx) {
|
|
snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
|
|
if (substream == NULL)
|
|
continue;
|
|
if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
|
|
return err;
|
|
}
|
|
return err;
|
|
}
|
|
|
|
static int snd_pcm_oss_nonblock(struct file * file)
|
|
{
|
|
file->f_flags |= O_NONBLOCK;
|
|
return 0;
|
|
}
|
|
|
|
static int snd_pcm_oss_get_caps1(snd_pcm_substream_t *substream, int res)
|
|
{
|
|
|
|
if (substream == NULL) {
|
|
res &= ~DSP_CAP_DUPLEX;
|
|
return res;
|
|
}
|
|
#ifdef DSP_CAP_MULTI
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
|
|
if (substream->pstr->substream_count > 1)
|
|
res |= DSP_CAP_MULTI;
|
|
#endif
|
|
/* DSP_CAP_REALTIME is set all times: */
|
|
/* all ALSA drivers can return actual pointer in ring buffer */
|
|
#if defined(DSP_CAP_REALTIME) && 0
|
|
{
|
|
snd_pcm_runtime_t *runtime = substream->runtime;
|
|
if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
|
|
res &= ~DSP_CAP_REALTIME;
|
|
}
|
|
#endif
|
|
return res;
|
|
}
|
|
|
|
static int snd_pcm_oss_get_caps(snd_pcm_oss_file_t *pcm_oss_file)
|
|
{
|
|
int result, idx;
|
|
|
|
result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
|
|
for (idx = 0; idx < 2; idx++) {
|
|
snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
|
|
result = snd_pcm_oss_get_caps1(substream, result);
|
|
}
|
|
result |= 0x0001; /* revision - same as SB AWE 64 */
|
|
return result;
|
|
}
|
|
|
|
static void snd_pcm_oss_simulate_fill(snd_pcm_substream_t *substream, snd_pcm_uframes_t hw_ptr)
|
|
{
|
|
snd_pcm_runtime_t *runtime = substream->runtime;
|
|
snd_pcm_uframes_t appl_ptr;
|
|
appl_ptr = hw_ptr + runtime->buffer_size;
|
|
appl_ptr %= runtime->boundary;
|
|
runtime->control->appl_ptr = appl_ptr;
|
|
}
|
|
|
|
static int snd_pcm_oss_set_trigger(snd_pcm_oss_file_t *pcm_oss_file, int trigger)
|
|
{
|
|
snd_pcm_runtime_t *runtime;
|
|
snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL;
|
|
int err, cmd;
|
|
|
|
#ifdef OSS_DEBUG
|
|
printk("pcm_oss: trigger = 0x%x\n", trigger);
|
|
#endif
|
|
|
|
psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
|
|
csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
|
|
|
|
if (psubstream) {
|
|
if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
|
|
return err;
|
|
}
|
|
if (csubstream) {
|
|
if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
|
|
return err;
|
|
}
|
|
if (psubstream) {
|
|
runtime = psubstream->runtime;
|
|
if (trigger & PCM_ENABLE_OUTPUT) {
|
|
if (runtime->oss.trigger)
|
|
goto _skip1;
|
|
if (atomic_read(&psubstream->runtime->mmap_count))
|
|
snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt);
|
|
runtime->oss.trigger = 1;
|
|
runtime->start_threshold = 1;
|
|
cmd = SNDRV_PCM_IOCTL_START;
|
|
} else {
|
|
if (!runtime->oss.trigger)
|
|
goto _skip1;
|
|
runtime->oss.trigger = 0;
|
|
runtime->start_threshold = runtime->boundary;
|
|
cmd = SNDRV_PCM_IOCTL_DROP;
|
|
runtime->oss.prepare = 1;
|
|
}
|
|
err = snd_pcm_kernel_playback_ioctl(psubstream, cmd, NULL);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
_skip1:
|
|
if (csubstream) {
|
|
runtime = csubstream->runtime;
|
|
if (trigger & PCM_ENABLE_INPUT) {
|
|
if (runtime->oss.trigger)
|
|
goto _skip2;
|
|
runtime->oss.trigger = 1;
|
|
runtime->start_threshold = 1;
|
|
cmd = SNDRV_PCM_IOCTL_START;
|
|
} else {
|
|
if (!runtime->oss.trigger)
|
|
goto _skip2;
|
|
runtime->oss.trigger = 0;
|
|
runtime->start_threshold = runtime->boundary;
|
|
cmd = SNDRV_PCM_IOCTL_DROP;
|
|
runtime->oss.prepare = 1;
|
|
}
|
|
err = snd_pcm_kernel_capture_ioctl(csubstream, cmd, NULL);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
_skip2:
|
|
return 0;
|
|
}
|
|
|
|
static int snd_pcm_oss_get_trigger(snd_pcm_oss_file_t *pcm_oss_file)
|
|
{
|
|
snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL;
|
|
int result = 0;
|
|
|
|
psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
|
|
csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
|
|
if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
|
|
result |= PCM_ENABLE_OUTPUT;
|
|
if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
|
|
result |= PCM_ENABLE_INPUT;
|
|
return result;
|
|
}
|
|
|
|
static int snd_pcm_oss_get_odelay(snd_pcm_oss_file_t *pcm_oss_file)
|
|
{
|
|
snd_pcm_substream_t *substream;
|
|
snd_pcm_runtime_t *runtime;
|
|
snd_pcm_sframes_t delay;
|
|
int err;
|
|
|
|
substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
|
|
if (substream == NULL)
|
|
return -EINVAL;
|
|
if ((err = snd_pcm_oss_make_ready(substream)) < 0)
|
|
return err;
|
|
runtime = substream->runtime;
|
|
if (runtime->oss.params || runtime->oss.prepare)
|
|
return 0;
|
|
err = snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
|
|
if (err == -EPIPE)
|
|
delay = 0; /* hack for broken OSS applications */
|
|
else if (err < 0)
|
|
return err;
|
|
return snd_pcm_oss_bytes(substream, delay);
|
|
}
|
|
|
|
static int snd_pcm_oss_get_ptr(snd_pcm_oss_file_t *pcm_oss_file, int stream, struct count_info __user * _info)
|
|
{
|
|
snd_pcm_substream_t *substream;
|
|
snd_pcm_runtime_t *runtime;
|
|
snd_pcm_sframes_t delay;
|
|
int fixup;
|
|
struct count_info info;
|
|
int err;
|
|
|
|
if (_info == NULL)
|
|
return -EFAULT;
|
|
substream = pcm_oss_file->streams[stream];
|
|
if (substream == NULL)
|
|
return -EINVAL;
|
|
if ((err = snd_pcm_oss_make_ready(substream)) < 0)
|
|
return err;
|
|
runtime = substream->runtime;
|
|
if (runtime->oss.params || runtime->oss.prepare) {
|
|
memset(&info, 0, sizeof(info));
|
|
if (copy_to_user(_info, &info, sizeof(info)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
|
err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
|
|
if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
|
|
err = 0;
|
|
delay = 0;
|
|
fixup = 0;
|
|
} else {
|
|
fixup = runtime->oss.buffer_used;
|
|
}
|
|
} else {
|
|
err = snd_pcm_oss_capture_position_fixup(substream, &delay);
|
|
fixup = -runtime->oss.buffer_used;
|
|
}
|
|
if (err < 0)
|
|
return err;
|
|
info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
|
|
if (atomic_read(&runtime->mmap_count)) {
|
|
snd_pcm_sframes_t n;
|
|
n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt;
|
|
if (n < 0)
|
|
n += runtime->boundary;
|
|
info.blocks = n / runtime->period_size;
|
|
runtime->oss.prev_hw_ptr_interrupt = delay;
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
|
|
snd_pcm_oss_simulate_fill(substream, delay);
|
|
info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
|
|
} else {
|
|
delay = snd_pcm_oss_bytes(substream, delay) + fixup;
|
|
info.blocks = delay / runtime->oss.period_bytes;
|
|
if (stream == SNDRV_PCM_STREAM_PLAYBACK)
|
|
info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
|
|
else
|
|
info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
|
|
}
|
|
if (copy_to_user(_info, &info, sizeof(info)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
static int snd_pcm_oss_get_space(snd_pcm_oss_file_t *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
|
|
{
|
|
snd_pcm_substream_t *substream;
|
|
snd_pcm_runtime_t *runtime;
|
|
snd_pcm_sframes_t avail;
|
|
int fixup;
|
|
struct audio_buf_info info;
|
|
int err;
|
|
|
|
if (_info == NULL)
|
|
return -EFAULT;
|
|
substream = pcm_oss_file->streams[stream];
|
|
if (substream == NULL)
|
|
return -EINVAL;
|
|
runtime = substream->runtime;
|
|
|
|
if (runtime->oss.params &&
|
|
(err = snd_pcm_oss_change_params(substream)) < 0)
|
|
return err;
|
|
|
|
info.fragsize = runtime->oss.period_bytes;
|
|
info.fragstotal = runtime->periods;
|
|
if (runtime->oss.prepare) {
|
|
if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
|
info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
|
|
info.fragments = runtime->oss.periods;
|
|
} else {
|
|
info.bytes = 0;
|
|
info.fragments = 0;
|
|
}
|
|
} else {
|
|
if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
|
|
err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
|
|
if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
|
|
avail = runtime->buffer_size;
|
|
err = 0;
|
|
fixup = 0;
|
|
} else {
|
|
avail = runtime->buffer_size - avail;
|
|
fixup = -runtime->oss.buffer_used;
|
|
}
|
|
} else {
|
|
err = snd_pcm_oss_capture_position_fixup(substream, &avail);
|
|
fixup = runtime->oss.buffer_used;
|
|
}
|
|
if (err < 0)
|
|
return err;
|
|
info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
|
|
info.fragments = info.bytes / runtime->oss.period_bytes;
|
|
}
|
|
|
|
#ifdef OSS_DEBUG
|
|
printk("pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", info.bytes, info.fragments, info.fragstotal, info.fragsize);
|
|
#endif
|
|
if (copy_to_user(_info, &info, sizeof(info)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
static int snd_pcm_oss_get_mapbuf(snd_pcm_oss_file_t *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
|
|
{
|
|
// it won't be probably implemented
|
|
// snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
static snd_pcm_oss_setup_t *snd_pcm_oss_look_for_setup(snd_pcm_t *pcm, int stream, const char *task_name)
|
|
{
|
|
const char *ptr, *ptrl;
|
|
snd_pcm_oss_setup_t *setup;
|
|
|
|
down(&pcm->streams[stream].oss.setup_mutex);
|
|
for (setup = pcm->streams[stream].oss.setup_list; setup; setup = setup->next) {
|
|
if (!strcmp(setup->task_name, task_name)) {
|
|
up(&pcm->streams[stream].oss.setup_mutex);
|
|
return setup;
|
|
}
|
|
}
|
|
ptr = ptrl = task_name;
|
|
while (*ptr) {
|
|
if (*ptr == '/')
|
|
ptrl = ptr + 1;
|
|
ptr++;
|
|
}
|
|
if (ptrl == task_name) {
|
|
goto __not_found;
|
|
return NULL;
|
|
}
|
|
for (setup = pcm->streams[stream].oss.setup_list; setup; setup = setup->next) {
|
|
if (!strcmp(setup->task_name, ptrl)) {
|
|
up(&pcm->streams[stream].oss.setup_mutex);
|
|
return setup;
|
|
}
|
|
}
|
|
__not_found:
|
|
up(&pcm->streams[stream].oss.setup_mutex);
|
|
return NULL;
|
|
}
|
|
|
|
static void snd_pcm_oss_init_substream(snd_pcm_substream_t *substream,
|
|
snd_pcm_oss_setup_t *setup,
|
|
int minor)
|
|
{
|
|
snd_pcm_runtime_t *runtime;
|
|
|
|
substream->oss.oss = 1;
|
|
substream->oss.setup = setup;
|
|
runtime = substream->runtime;
|
|
runtime->oss.params = 1;
|
|
runtime->oss.trigger = 1;
|
|
runtime->oss.rate = 8000;
|
|
switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
|
|
case SNDRV_MINOR_OSS_PCM_8:
|
|
runtime->oss.format = AFMT_U8;
|
|
break;
|
|
case SNDRV_MINOR_OSS_PCM_16:
|
|
runtime->oss.format = AFMT_S16_LE;
|
|
break;
|
|
default:
|
|
runtime->oss.format = AFMT_MU_LAW;
|
|
}
|
|
runtime->oss.channels = 1;
|
|
runtime->oss.fragshift = 0;
|
|
runtime->oss.maxfrags = 0;
|
|
runtime->oss.subdivision = 0;
|
|
}
|
|
|
|
static void snd_pcm_oss_release_substream(snd_pcm_substream_t *substream)
|
|
{
|
|
snd_pcm_runtime_t *runtime;
|
|
runtime = substream->runtime;
|
|
vfree(runtime->oss.buffer);
|
|
snd_pcm_oss_plugin_clear(substream);
|
|
substream->oss.file = NULL;
|
|
substream->oss.oss = 0;
|
|
}
|
|
|
|
static int snd_pcm_oss_release_file(snd_pcm_oss_file_t *pcm_oss_file)
|
|
{
|
|
int cidx;
|
|
snd_assert(pcm_oss_file != NULL, return -ENXIO);
|
|
for (cidx = 0; cidx < 2; ++cidx) {
|
|
snd_pcm_substream_t *substream = pcm_oss_file->streams[cidx];
|
|
snd_pcm_runtime_t *runtime;
|
|
if (substream == NULL)
|
|
continue;
|
|
runtime = substream->runtime;
|
|
|
|
snd_pcm_stream_lock_irq(substream);
|
|
if (snd_pcm_running(substream))
|
|
snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
|
|
snd_pcm_stream_unlock_irq(substream);
|
|
if (substream->open_flag) {
|
|
if (substream->ops->hw_free != NULL)
|
|
substream->ops->hw_free(substream);
|
|
substream->ops->close(substream);
|
|
substream->open_flag = 0;
|
|
}
|
|
substream->ffile = NULL;
|
|
snd_pcm_oss_release_substream(substream);
|
|
snd_pcm_release_substream(substream);
|
|
}
|
|
kfree(pcm_oss_file);
|
|
return 0;
|
|
}
|
|
|
|
static int snd_pcm_oss_open_file(struct file *file,
|
|
snd_pcm_t *pcm,
|
|
snd_pcm_oss_file_t **rpcm_oss_file,
|
|
int minor,
|
|
snd_pcm_oss_setup_t *psetup,
|
|
snd_pcm_oss_setup_t *csetup)
|
|
{
|
|
int err = 0;
|
|
snd_pcm_oss_file_t *pcm_oss_file;
|
|
snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL;
|
|
unsigned int f_mode = file->f_mode;
|
|
|
|
snd_assert(rpcm_oss_file != NULL, return -EINVAL);
|
|
*rpcm_oss_file = NULL;
|
|
|
|
pcm_oss_file = kcalloc(1, sizeof(*pcm_oss_file), GFP_KERNEL);
|
|
if (pcm_oss_file == NULL)
|
|
return -ENOMEM;
|
|
|
|
if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
|
|
(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
|
|
f_mode = FMODE_WRITE;
|
|
if ((f_mode & FMODE_WRITE) && !(psetup && psetup->disable)) {
|
|
if ((err = snd_pcm_open_substream(pcm, SNDRV_PCM_STREAM_PLAYBACK,
|
|
&psubstream)) < 0) {
|
|
snd_pcm_oss_release_file(pcm_oss_file);
|
|
return err;
|
|
}
|
|
pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK] = psubstream;
|
|
}
|
|
if ((f_mode & FMODE_READ) && !(csetup && csetup->disable)) {
|
|
if ((err = snd_pcm_open_substream(pcm, SNDRV_PCM_STREAM_CAPTURE,
|
|
&csubstream)) < 0) {
|
|
if (!(f_mode & FMODE_WRITE) || err != -ENODEV) {
|
|
snd_pcm_oss_release_file(pcm_oss_file);
|
|
return err;
|
|
} else {
|
|
csubstream = NULL;
|
|
}
|
|
}
|
|
pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE] = csubstream;
|
|
}
|
|
|
|
if (psubstream == NULL && csubstream == NULL) {
|
|
snd_pcm_oss_release_file(pcm_oss_file);
|
|
return -EINVAL;
|
|
}
|
|
if (psubstream != NULL) {
|
|
psubstream->oss.file = pcm_oss_file;
|
|
err = snd_pcm_hw_constraints_init(psubstream);
|
|
if (err < 0) {
|
|
snd_printd("snd_pcm_hw_constraint_init failed\n");
|
|
snd_pcm_oss_release_file(pcm_oss_file);
|
|
return err;
|
|
}
|
|
if ((err = psubstream->ops->open(psubstream)) < 0) {
|
|
snd_pcm_oss_release_file(pcm_oss_file);
|
|
return err;
|
|
}
|
|
psubstream->open_flag = 1;
|
|
err = snd_pcm_hw_constraints_complete(psubstream);
|
|
if (err < 0) {
|
|
snd_printd("snd_pcm_hw_constraint_complete failed\n");
|
|
snd_pcm_oss_release_file(pcm_oss_file);
|
|
return err;
|
|
}
|
|
psubstream->ffile = file;
|
|
snd_pcm_oss_init_substream(psubstream, psetup, minor);
|
|
}
|
|
if (csubstream != NULL) {
|
|
csubstream->oss.file = pcm_oss_file;
|
|
err = snd_pcm_hw_constraints_init(csubstream);
|
|
if (err < 0) {
|
|
snd_printd("snd_pcm_hw_constraint_init failed\n");
|
|
snd_pcm_oss_release_file(pcm_oss_file);
|
|
return err;
|
|
}
|
|
if ((err = csubstream->ops->open(csubstream)) < 0) {
|
|
snd_pcm_oss_release_file(pcm_oss_file);
|
|
return err;
|
|
}
|
|
csubstream->open_flag = 1;
|
|
err = snd_pcm_hw_constraints_complete(csubstream);
|
|
if (err < 0) {
|
|
snd_printd("snd_pcm_hw_constraint_complete failed\n");
|
|
snd_pcm_oss_release_file(pcm_oss_file);
|
|
return err;
|
|
}
|
|
csubstream->ffile = file;
|
|
snd_pcm_oss_init_substream(csubstream, csetup, minor);
|
|
}
|
|
|
|
file->private_data = pcm_oss_file;
|
|
*rpcm_oss_file = pcm_oss_file;
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int snd_pcm_oss_open(struct inode *inode, struct file *file)
|
|
{
|
|
int minor = iminor(inode);
|
|
int cardnum = SNDRV_MINOR_OSS_CARD(minor);
|
|
int device;
|
|
int err;
|
|
char task_name[32];
|
|
snd_pcm_t *pcm;
|
|
snd_pcm_oss_file_t *pcm_oss_file;
|
|
snd_pcm_oss_setup_t *psetup = NULL, *csetup = NULL;
|
|
int nonblock;
|
|
wait_queue_t wait;
|
|
|
|
snd_assert(cardnum >= 0 && cardnum < SNDRV_CARDS, return -ENXIO);
|
|
device = SNDRV_MINOR_OSS_DEVICE(minor) == SNDRV_MINOR_OSS_PCM1 ?
|
|
adsp_map[cardnum] : dsp_map[cardnum];
|
|
|
|
pcm = snd_pcm_devices[(cardnum * SNDRV_PCM_DEVICES) + device];
|
|
if (pcm == NULL) {
|
|
err = -ENODEV;
|
|
goto __error1;
|
|
}
|
|
err = snd_card_file_add(pcm->card, file);
|
|
if (err < 0)
|
|
goto __error1;
|
|
if (!try_module_get(pcm->card->module)) {
|
|
err = -EFAULT;
|
|
goto __error2;
|
|
}
|
|
if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
|
|
err = -EFAULT;
|
|
goto __error;
|
|
}
|
|
if (file->f_mode & FMODE_WRITE)
|
|
psetup = snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, task_name);
|
|
if (file->f_mode & FMODE_READ)
|
|
csetup = snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, task_name);
|
|
|
|
nonblock = !!(file->f_flags & O_NONBLOCK);
|
|
if (psetup && !psetup->disable) {
|
|
if (psetup->nonblock)
|
|
nonblock = 1;
|
|
else if (psetup->block)
|
|
nonblock = 0;
|
|
} else if (csetup && !csetup->disable) {
|
|
if (csetup->nonblock)
|
|
nonblock = 1;
|
|
else if (csetup->block)
|
|
nonblock = 0;
|
|
}
|
|
if (!nonblock)
|
|
nonblock = nonblock_open;
|
|
|
|
init_waitqueue_entry(&wait, current);
|
|
add_wait_queue(&pcm->open_wait, &wait);
|
|
down(&pcm->open_mutex);
|
|
while (1) {
|
|
err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
|
|
minor, psetup, csetup);
|
|
if (err >= 0)
|
|
break;
|
|
if (err == -EAGAIN) {
|
|
if (nonblock) {
|
|
err = -EBUSY;
|
|
break;
|
|
}
|
|
} else
|
|
break;
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
up(&pcm->open_mutex);
|
|
schedule();
|
|
down(&pcm->open_mutex);
|
|
if (signal_pending(current)) {
|
|
err = -ERESTARTSYS;
|
|
break;
|
|
}
|
|
}
|
|
remove_wait_queue(&pcm->open_wait, &wait);
|
|
up(&pcm->open_mutex);
|
|
if (err < 0)
|
|
goto __error;
|
|
return err;
|
|
|
|
__error:
|
|
module_put(pcm->card->module);
|
|
__error2:
|
|
snd_card_file_remove(pcm->card, file);
|
|
__error1:
|
|
return err;
|
|
}
|
|
|
|
static int snd_pcm_oss_release(struct inode *inode, struct file *file)
|
|
{
|
|
snd_pcm_t *pcm;
|
|
snd_pcm_substream_t *substream;
|
|
snd_pcm_oss_file_t *pcm_oss_file;
|
|
|
|
pcm_oss_file = file->private_data;
|
|
substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
|
|
if (substream == NULL)
|
|
substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
|
|
snd_assert(substream != NULL, return -ENXIO);
|
|
pcm = substream->pcm;
|
|
snd_pcm_oss_sync(pcm_oss_file);
|
|
down(&pcm->open_mutex);
|
|
snd_pcm_oss_release_file(pcm_oss_file);
|
|
up(&pcm->open_mutex);
|
|
wake_up(&pcm->open_wait);
|
|
module_put(pcm->card->module);
|
|
snd_card_file_remove(pcm->card, file);
|
|
return 0;
|
|
}
|
|
|
|
static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
|
|
{
|
|
snd_pcm_oss_file_t *pcm_oss_file;
|
|
int __user *p = (int __user *)arg;
|
|
int res;
|
|
|
|
pcm_oss_file = file->private_data;
|
|
if (cmd == OSS_GETVERSION)
|
|
return put_user(SNDRV_OSS_VERSION, p);
|
|
if (cmd == OSS_ALSAEMULVER)
|
|
return put_user(1, p);
|
|
#if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
|
|
if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
|
|
snd_pcm_substream_t *substream;
|
|
int idx;
|
|
for (idx = 0; idx < 2; ++idx) {
|
|
substream = pcm_oss_file->streams[idx];
|
|
if (substream != NULL)
|
|
break;
|
|
}
|
|
snd_assert(substream != NULL, return -ENXIO);
|
|
return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
|
|
}
|
|
#endif
|
|
if (((cmd >> 8) & 0xff) != 'P')
|
|
return -EINVAL;
|
|
#ifdef OSS_DEBUG
|
|
printk("pcm_oss: ioctl = 0x%x\n", cmd);
|
|
#endif
|
|
switch (cmd) {
|
|
case SNDCTL_DSP_RESET:
|
|
return snd_pcm_oss_reset(pcm_oss_file);
|
|
case SNDCTL_DSP_SYNC:
|
|
return snd_pcm_oss_sync(pcm_oss_file);
|
|
case SNDCTL_DSP_SPEED:
|
|
if (get_user(res, p))
|
|
return -EFAULT;
|
|
if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
|
|
return res;
|
|
return put_user(res, p);
|
|
case SOUND_PCM_READ_RATE:
|
|
res = snd_pcm_oss_get_rate(pcm_oss_file);
|
|
if (res < 0)
|
|
return res;
|
|
return put_user(res, p);
|
|
case SNDCTL_DSP_STEREO:
|
|
if (get_user(res, p))
|
|
return -EFAULT;
|
|
res = res > 0 ? 2 : 1;
|
|
if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
|
|
return res;
|
|
return put_user(--res, p);
|
|
case SNDCTL_DSP_GETBLKSIZE:
|
|
res = snd_pcm_oss_get_block_size(pcm_oss_file);
|
|
if (res < 0)
|
|
return res;
|
|
return put_user(res, p);
|
|
case SNDCTL_DSP_SETFMT:
|
|
if (get_user(res, p))
|
|
return -EFAULT;
|
|
res = snd_pcm_oss_set_format(pcm_oss_file, res);
|
|
if (res < 0)
|
|
return res;
|
|
return put_user(res, p);
|
|
case SOUND_PCM_READ_BITS:
|
|
res = snd_pcm_oss_get_format(pcm_oss_file);
|
|
if (res < 0)
|
|
return res;
|
|
return put_user(res, p);
|
|
case SNDCTL_DSP_CHANNELS:
|
|
if (get_user(res, p))
|
|
return -EFAULT;
|
|
res = snd_pcm_oss_set_channels(pcm_oss_file, res);
|
|
if (res < 0)
|
|
return res;
|
|
return put_user(res, p);
|
|
case SOUND_PCM_READ_CHANNELS:
|
|
res = snd_pcm_oss_get_channels(pcm_oss_file);
|
|
if (res < 0)
|
|
return res;
|
|
return put_user(res, p);
|
|
case SOUND_PCM_WRITE_FILTER:
|
|
case SOUND_PCM_READ_FILTER:
|
|
return -EIO;
|
|
case SNDCTL_DSP_POST:
|
|
return snd_pcm_oss_post(pcm_oss_file);
|
|
case SNDCTL_DSP_SUBDIVIDE:
|
|
if (get_user(res, p))
|
|
return -EFAULT;
|
|
res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
|
|
if (res < 0)
|
|
return res;
|
|
return put_user(res, p);
|
|
case SNDCTL_DSP_SETFRAGMENT:
|
|
if (get_user(res, p))
|
|
return -EFAULT;
|
|
return snd_pcm_oss_set_fragment(pcm_oss_file, res);
|
|
case SNDCTL_DSP_GETFMTS:
|
|
res = snd_pcm_oss_get_formats(pcm_oss_file);
|
|
if (res < 0)
|
|
return res;
|
|
return put_user(res, p);
|
|
case SNDCTL_DSP_GETOSPACE:
|
|
case SNDCTL_DSP_GETISPACE:
|
|
return snd_pcm_oss_get_space(pcm_oss_file,
|
|
cmd == SNDCTL_DSP_GETISPACE ?
|
|
SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
|
|
(struct audio_buf_info __user *) arg);
|
|
case SNDCTL_DSP_NONBLOCK:
|
|
return snd_pcm_oss_nonblock(file);
|
|
case SNDCTL_DSP_GETCAPS:
|
|
res = snd_pcm_oss_get_caps(pcm_oss_file);
|
|
if (res < 0)
|
|
return res;
|
|
return put_user(res, p);
|
|
case SNDCTL_DSP_GETTRIGGER:
|
|
res = snd_pcm_oss_get_trigger(pcm_oss_file);
|
|
if (res < 0)
|
|
return res;
|
|
return put_user(res, p);
|
|
case SNDCTL_DSP_SETTRIGGER:
|
|
if (get_user(res, p))
|
|
return -EFAULT;
|
|
return snd_pcm_oss_set_trigger(pcm_oss_file, res);
|
|
case SNDCTL_DSP_GETIPTR:
|
|
case SNDCTL_DSP_GETOPTR:
|
|
return snd_pcm_oss_get_ptr(pcm_oss_file,
|
|
cmd == SNDCTL_DSP_GETIPTR ?
|
|
SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
|
|
(struct count_info __user *) arg);
|
|
case SNDCTL_DSP_MAPINBUF:
|
|
case SNDCTL_DSP_MAPOUTBUF:
|
|
return snd_pcm_oss_get_mapbuf(pcm_oss_file,
|
|
cmd == SNDCTL_DSP_MAPINBUF ?
|
|
SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
|
|
(struct buffmem_desc __user *) arg);
|
|
case SNDCTL_DSP_SETSYNCRO:
|
|
/* stop DMA now.. */
|
|
return 0;
|
|
case SNDCTL_DSP_SETDUPLEX:
|
|
if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
|
|
return 0;
|
|
return -EIO;
|
|
case SNDCTL_DSP_GETODELAY:
|
|
res = snd_pcm_oss_get_odelay(pcm_oss_file);
|
|
if (res < 0) {
|
|
/* it's for sure, some broken apps don't check for error codes */
|
|
put_user(0, p);
|
|
return res;
|
|
}
|
|
return put_user(res, p);
|
|
case SNDCTL_DSP_PROFILE:
|
|
return 0; /* silently ignore */
|
|
default:
|
|
snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
/* all compatible */
|
|
#define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl
|
|
#else
|
|
#define snd_pcm_oss_ioctl_compat NULL
|
|
#endif
|
|
|
|
static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
|
|
{
|
|
snd_pcm_oss_file_t *pcm_oss_file;
|
|
snd_pcm_substream_t *substream;
|
|
|
|
pcm_oss_file = file->private_data;
|
|
substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
|
|
if (substream == NULL)
|
|
return -ENXIO;
|
|
#ifndef OSS_DEBUG
|
|
return snd_pcm_oss_read1(substream, buf, count);
|
|
#else
|
|
{
|
|
ssize_t res = snd_pcm_oss_read1(substream, buf, count);
|
|
printk("pcm_oss: read %li bytes (returned %li bytes)\n", (long)count, (long)res);
|
|
return res;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
|
|
{
|
|
snd_pcm_oss_file_t *pcm_oss_file;
|
|
snd_pcm_substream_t *substream;
|
|
long result;
|
|
|
|
pcm_oss_file = file->private_data;
|
|
substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
|
|
if (substream == NULL)
|
|
return -ENXIO;
|
|
up(&file->f_dentry->d_inode->i_sem);
|
|
result = snd_pcm_oss_write1(substream, buf, count);
|
|
down(&file->f_dentry->d_inode->i_sem);
|
|
#ifdef OSS_DEBUG
|
|
printk("pcm_oss: write %li bytes (wrote %li bytes)\n", (long)count, (long)result);
|
|
#endif
|
|
return result;
|
|
}
|
|
|
|
static int snd_pcm_oss_playback_ready(snd_pcm_substream_t *substream)
|
|
{
|
|
snd_pcm_runtime_t *runtime = substream->runtime;
|
|
if (atomic_read(&runtime->mmap_count))
|
|
return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
|
|
else
|
|
return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames;
|
|
}
|
|
|
|
static int snd_pcm_oss_capture_ready(snd_pcm_substream_t *substream)
|
|
{
|
|
snd_pcm_runtime_t *runtime = substream->runtime;
|
|
if (atomic_read(&runtime->mmap_count))
|
|
return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
|
|
else
|
|
return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames;
|
|
}
|
|
|
|
static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
|
|
{
|
|
snd_pcm_oss_file_t *pcm_oss_file;
|
|
unsigned int mask;
|
|
snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL;
|
|
|
|
pcm_oss_file = file->private_data;
|
|
|
|
psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
|
|
csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
|
|
|
|
mask = 0;
|
|
if (psubstream != NULL) {
|
|
snd_pcm_runtime_t *runtime = psubstream->runtime;
|
|
poll_wait(file, &runtime->sleep, wait);
|
|
snd_pcm_stream_lock_irq(psubstream);
|
|
if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
|
|
(runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
|
|
snd_pcm_oss_playback_ready(psubstream)))
|
|
mask |= POLLOUT | POLLWRNORM;
|
|
snd_pcm_stream_unlock_irq(psubstream);
|
|
}
|
|
if (csubstream != NULL) {
|
|
snd_pcm_runtime_t *runtime = csubstream->runtime;
|
|
enum sndrv_pcm_state ostate;
|
|
poll_wait(file, &runtime->sleep, wait);
|
|
snd_pcm_stream_lock_irq(csubstream);
|
|
if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
|
|
snd_pcm_oss_capture_ready(csubstream))
|
|
mask |= POLLIN | POLLRDNORM;
|
|
snd_pcm_stream_unlock_irq(csubstream);
|
|
if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
|
|
snd_pcm_oss_file_t ofile;
|
|
memset(&ofile, 0, sizeof(ofile));
|
|
ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
|
|
runtime->oss.trigger = 0;
|
|
snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
|
|
}
|
|
}
|
|
|
|
return mask;
|
|
}
|
|
|
|
static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
|
|
{
|
|
snd_pcm_oss_file_t *pcm_oss_file;
|
|
snd_pcm_substream_t *substream = NULL;
|
|
snd_pcm_runtime_t *runtime;
|
|
int err;
|
|
|
|
#ifdef OSS_DEBUG
|
|
printk("pcm_oss: mmap begin\n");
|
|
#endif
|
|
pcm_oss_file = file->private_data;
|
|
switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
|
|
case VM_READ | VM_WRITE:
|
|
substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
|
|
if (substream)
|
|
break;
|
|
/* Fall through */
|
|
case VM_READ:
|
|
substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
|
|
break;
|
|
case VM_WRITE:
|
|
substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
/* set VM_READ access as well to fix memset() routines that do
|
|
reads before writes (to improve performance) */
|
|
area->vm_flags |= VM_READ;
|
|
if (substream == NULL)
|
|
return -ENXIO;
|
|
runtime = substream->runtime;
|
|
if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
|
|
return -EIO;
|
|
if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
|
|
runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
|
|
else
|
|
return -EIO;
|
|
|
|
if (runtime->oss.params) {
|
|
if ((err = snd_pcm_oss_change_params(substream)) < 0)
|
|
return err;
|
|
}
|
|
if (runtime->oss.plugin_first != NULL)
|
|
return -EIO;
|
|
|
|
if (area->vm_pgoff != 0)
|
|
return -EINVAL;
|
|
|
|
err = snd_pcm_mmap_data(substream, file, area);
|
|
if (err < 0)
|
|
return err;
|
|
runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
|
|
runtime->silence_threshold = 0;
|
|
runtime->silence_size = 0;
|
|
#ifdef OSS_DEBUG
|
|
printk("pcm_oss: mmap ok, bytes = 0x%x\n", runtime->oss.mmap_bytes);
|
|
#endif
|
|
/* In mmap mode we never stop */
|
|
runtime->stop_threshold = runtime->boundary;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* /proc interface
|
|
*/
|
|
|
|
static void snd_pcm_oss_proc_read(snd_info_entry_t *entry,
|
|
snd_info_buffer_t * buffer)
|
|
{
|
|
snd_pcm_str_t *pstr = (snd_pcm_str_t *)entry->private_data;
|
|
snd_pcm_oss_setup_t *setup = pstr->oss.setup_list;
|
|
down(&pstr->oss.setup_mutex);
|
|
while (setup) {
|
|
snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
|
|
setup->task_name,
|
|
setup->periods,
|
|
setup->period_size,
|
|
setup->disable ? " disable" : "",
|
|
setup->direct ? " direct" : "",
|
|
setup->block ? " block" : "",
|
|
setup->nonblock ? " non-block" : "",
|
|
setup->partialfrag ? " partial-frag" : "",
|
|
setup->nosilence ? " no-silence" : "");
|
|
setup = setup->next;
|
|
}
|
|
up(&pstr->oss.setup_mutex);
|
|
}
|
|
|
|
static void snd_pcm_oss_proc_free_setup_list(snd_pcm_str_t * pstr)
|
|
{
|
|
unsigned int idx;
|
|
snd_pcm_substream_t *substream;
|
|
snd_pcm_oss_setup_t *setup, *setupn;
|
|
|
|
for (idx = 0, substream = pstr->substream;
|
|
idx < pstr->substream_count; idx++, substream = substream->next)
|
|
substream->oss.setup = NULL;
|
|
for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
|
|
setup; setup = setupn) {
|
|
setupn = setup->next;
|
|
kfree(setup->task_name);
|
|
kfree(setup);
|
|
}
|
|
pstr->oss.setup_list = NULL;
|
|
}
|
|
|
|
static void snd_pcm_oss_proc_write(snd_info_entry_t *entry,
|
|
snd_info_buffer_t * buffer)
|
|
{
|
|
snd_pcm_str_t *pstr = (snd_pcm_str_t *)entry->private_data;
|
|
char line[128], str[32], task_name[32], *ptr;
|
|
int idx1;
|
|
snd_pcm_oss_setup_t *setup, *setup1, template;
|
|
|
|
while (!snd_info_get_line(buffer, line, sizeof(line))) {
|
|
down(&pstr->oss.setup_mutex);
|
|
memset(&template, 0, sizeof(template));
|
|
ptr = snd_info_get_str(task_name, line, sizeof(task_name));
|
|
if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
|
|
snd_pcm_oss_proc_free_setup_list(pstr);
|
|
up(&pstr->oss.setup_mutex);
|
|
continue;
|
|
}
|
|
for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
|
|
if (!strcmp(setup->task_name, task_name)) {
|
|
template = *setup;
|
|
break;
|
|
}
|
|
}
|
|
ptr = snd_info_get_str(str, ptr, sizeof(str));
|
|
template.periods = simple_strtoul(str, NULL, 10);
|
|
ptr = snd_info_get_str(str, ptr, sizeof(str));
|
|
template.period_size = simple_strtoul(str, NULL, 10);
|
|
for (idx1 = 31; idx1 >= 0; idx1--)
|
|
if (template.period_size & (1 << idx1))
|
|
break;
|
|
for (idx1--; idx1 >= 0; idx1--)
|
|
template.period_size &= ~(1 << idx1);
|
|
do {
|
|
ptr = snd_info_get_str(str, ptr, sizeof(str));
|
|
if (!strcmp(str, "disable")) {
|
|
template.disable = 1;
|
|
} else if (!strcmp(str, "direct")) {
|
|
template.direct = 1;
|
|
} else if (!strcmp(str, "block")) {
|
|
template.block = 1;
|
|
} else if (!strcmp(str, "non-block")) {
|
|
template.nonblock = 1;
|
|
} else if (!strcmp(str, "partial-frag")) {
|
|
template.partialfrag = 1;
|
|
} else if (!strcmp(str, "no-silence")) {
|
|
template.nosilence = 1;
|
|
}
|
|
} while (*str);
|
|
if (setup == NULL) {
|
|
setup = (snd_pcm_oss_setup_t *) kmalloc(sizeof(snd_pcm_oss_setup_t), GFP_KERNEL);
|
|
if (setup) {
|
|
if (pstr->oss.setup_list == NULL) {
|
|
pstr->oss.setup_list = setup;
|
|
} else {
|
|
for (setup1 = pstr->oss.setup_list; setup1->next; setup1 = setup1->next);
|
|
setup1->next = setup;
|
|
}
|
|
template.task_name = snd_kmalloc_strdup(task_name, GFP_KERNEL);
|
|
} else {
|
|
buffer->error = -ENOMEM;
|
|
}
|
|
}
|
|
if (setup)
|
|
*setup = template;
|
|
up(&pstr->oss.setup_mutex);
|
|
}
|
|
}
|
|
|
|
static void snd_pcm_oss_proc_init(snd_pcm_t *pcm)
|
|
{
|
|
int stream;
|
|
for (stream = 0; stream < 2; ++stream) {
|
|
snd_info_entry_t *entry;
|
|
snd_pcm_str_t *pstr = &pcm->streams[stream];
|
|
if (pstr->substream_count == 0)
|
|
continue;
|
|
if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
|
|
entry->content = SNDRV_INFO_CONTENT_TEXT;
|
|
entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
|
|
entry->c.text.read_size = 8192;
|
|
entry->c.text.read = snd_pcm_oss_proc_read;
|
|
entry->c.text.write_size = 8192;
|
|
entry->c.text.write = snd_pcm_oss_proc_write;
|
|
entry->private_data = pstr;
|
|
if (snd_info_register(entry) < 0) {
|
|
snd_info_free_entry(entry);
|
|
entry = NULL;
|
|
}
|
|
}
|
|
pstr->oss.proc_entry = entry;
|
|
}
|
|
}
|
|
|
|
static void snd_pcm_oss_proc_done(snd_pcm_t *pcm)
|
|
{
|
|
int stream;
|
|
for (stream = 0; stream < 2; ++stream) {
|
|
snd_pcm_str_t *pstr = &pcm->streams[stream];
|
|
if (pstr->oss.proc_entry) {
|
|
snd_info_unregister(pstr->oss.proc_entry);
|
|
pstr->oss.proc_entry = NULL;
|
|
snd_pcm_oss_proc_free_setup_list(pstr);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* ENTRY functions
|
|
*/
|
|
|
|
static struct file_operations snd_pcm_oss_f_reg =
|
|
{
|
|
.owner = THIS_MODULE,
|
|
.read = snd_pcm_oss_read,
|
|
.write = snd_pcm_oss_write,
|
|
.open = snd_pcm_oss_open,
|
|
.release = snd_pcm_oss_release,
|
|
.poll = snd_pcm_oss_poll,
|
|
.unlocked_ioctl = snd_pcm_oss_ioctl,
|
|
.compat_ioctl = snd_pcm_oss_ioctl_compat,
|
|
.mmap = snd_pcm_oss_mmap,
|
|
};
|
|
|
|
static snd_minor_t snd_pcm_oss_reg =
|
|
{
|
|
.comment = "digital audio",
|
|
.f_ops = &snd_pcm_oss_f_reg,
|
|
};
|
|
|
|
static void register_oss_dsp(snd_pcm_t *pcm, int index)
|
|
{
|
|
char name[128];
|
|
sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
|
|
if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
|
|
pcm->card, index, &snd_pcm_oss_reg,
|
|
name) < 0) {
|
|
snd_printk("unable to register OSS PCM device %i:%i\n", pcm->card->number, pcm->device);
|
|
}
|
|
}
|
|
|
|
static int snd_pcm_oss_register_minor(snd_pcm_t * pcm)
|
|
{
|
|
pcm->oss.reg = 0;
|
|
if (dsp_map[pcm->card->number] == (int)pcm->device) {
|
|
char name[128];
|
|
int duplex;
|
|
register_oss_dsp(pcm, 0);
|
|
duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
|
|
pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
|
|
!(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
|
|
sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
|
|
#ifdef SNDRV_OSS_INFO_DEV_AUDIO
|
|
snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
|
|
pcm->card->number,
|
|
name);
|
|
#endif
|
|
pcm->oss.reg++;
|
|
pcm->oss.reg_mask |= 1;
|
|
}
|
|
if (adsp_map[pcm->card->number] == (int)pcm->device) {
|
|
register_oss_dsp(pcm, 1);
|
|
pcm->oss.reg++;
|
|
pcm->oss.reg_mask |= 2;
|
|
}
|
|
|
|
if (pcm->oss.reg)
|
|
snd_pcm_oss_proc_init(pcm);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int snd_pcm_oss_disconnect_minor(snd_pcm_t * pcm)
|
|
{
|
|
if (pcm->oss.reg) {
|
|
if (pcm->oss.reg_mask & 1) {
|
|
pcm->oss.reg_mask &= ~1;
|
|
snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
|
|
pcm->card, 0);
|
|
}
|
|
if (pcm->oss.reg_mask & 2) {
|
|
pcm->oss.reg_mask &= ~2;
|
|
snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
|
|
pcm->card, 1);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int snd_pcm_oss_unregister_minor(snd_pcm_t * pcm)
|
|
{
|
|
snd_pcm_oss_disconnect_minor(pcm);
|
|
if (pcm->oss.reg) {
|
|
if (dsp_map[pcm->card->number] == (int)pcm->device) {
|
|
#ifdef SNDRV_OSS_INFO_DEV_AUDIO
|
|
snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
|
|
#endif
|
|
}
|
|
pcm->oss.reg = 0;
|
|
snd_pcm_oss_proc_done(pcm);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static snd_pcm_notify_t snd_pcm_oss_notify =
|
|
{
|
|
.n_register = snd_pcm_oss_register_minor,
|
|
.n_disconnect = snd_pcm_oss_disconnect_minor,
|
|
.n_unregister = snd_pcm_oss_unregister_minor,
|
|
};
|
|
|
|
static int __init alsa_pcm_oss_init(void)
|
|
{
|
|
int i;
|
|
int err;
|
|
|
|
/* check device map table */
|
|
for (i = 0; i < SNDRV_CARDS; i++) {
|
|
if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
|
|
snd_printk("invalid dsp_map[%d] = %d\n", i, dsp_map[i]);
|
|
dsp_map[i] = 0;
|
|
}
|
|
if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
|
|
snd_printk("invalid adsp_map[%d] = %d\n", i, adsp_map[i]);
|
|
adsp_map[i] = 1;
|
|
}
|
|
}
|
|
if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
|
|
return err;
|
|
return 0;
|
|
}
|
|
|
|
static void __exit alsa_pcm_oss_exit(void)
|
|
{
|
|
snd_pcm_notify(&snd_pcm_oss_notify, 1);
|
|
}
|
|
|
|
module_init(alsa_pcm_oss_init)
|
|
module_exit(alsa_pcm_oss_exit)
|