ALSA: oxfw: add support for capturing PCM samples
In previous commit, a support for transmitted packets is added. This commit add a support for capturing PCM samples. When any streams are already started, this driver should not change sampling rate of the device, thus this commit also adds a restriction of sampling rate in this situation. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Acked-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto
Takashi Iwai
parent
b0ac00095f
commit
216e256f7b
1 changed files with 180 additions and 20 deletions
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@ -118,21 +118,31 @@ static void limit_period_and_buffer(struct snd_pcm_hardware *hw)
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hw->buffer_bytes_max = hw->period_bytes_max * hw->periods_min;
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}
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static int pcm_open(struct snd_pcm_substream *substream)
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static int init_hw_params(struct snd_oxfw *oxfw,
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struct snd_pcm_substream *substream)
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{
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struct snd_oxfw *oxfw = substream->private_data;
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struct snd_pcm_runtime *runtime = substream->runtime;
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u8 **formats;
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struct amdtp_stream *stream;
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int err;
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formats = oxfw->rx_stream_formats;
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runtime->hw.info = SNDRV_PCM_INFO_BATCH |
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SNDRV_PCM_INFO_BLOCK_TRANSFER |
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SNDRV_PCM_INFO_INTERLEAVED |
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SNDRV_PCM_INFO_JOINT_DUPLEX |
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SNDRV_PCM_INFO_MMAP |
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SNDRV_PCM_INFO_MMAP_VALID;
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if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
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runtime->hw.formats = AMDTP_IN_PCM_FORMAT_BITS;
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stream = &oxfw->tx_stream;
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formats = oxfw->tx_stream_formats;
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} else {
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runtime->hw.formats = AMDTP_OUT_PCM_FORMAT_BITS;
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stream = &oxfw->rx_stream;
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formats = oxfw->rx_stream_formats;
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}
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limit_channels_and_rates(&runtime->hw, formats);
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limit_period_and_buffer(&runtime->hw);
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@ -148,10 +158,55 @@ static int pcm_open(struct snd_pcm_substream *substream)
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if (err < 0)
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goto end;
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err = amdtp_stream_add_pcm_hw_constraints(&oxfw->rx_stream, runtime);
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err = amdtp_stream_add_pcm_hw_constraints(stream, runtime);
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end:
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return err;
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}
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static int limit_to_current_params(struct snd_pcm_substream *substream)
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{
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struct snd_oxfw *oxfw = substream->private_data;
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struct snd_oxfw_stream_formation formation;
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enum avc_general_plug_dir dir;
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int err;
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if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
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dir = AVC_GENERAL_PLUG_DIR_OUT;
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else
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dir = AVC_GENERAL_PLUG_DIR_IN;
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err = snd_oxfw_stream_get_current_formation(oxfw, dir, &formation);
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if (err < 0)
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goto end;
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substream->runtime->hw.channels_min = formation.pcm;
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substream->runtime->hw.channels_max = formation.pcm;
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substream->runtime->hw.rate_min = formation.rate;
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substream->runtime->hw.rate_max = formation.rate;
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end:
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return err;
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}
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static int pcm_open(struct snd_pcm_substream *substream)
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{
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struct snd_oxfw *oxfw = substream->private_data;
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int err;
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err = init_hw_params(oxfw, substream);
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if (err < 0)
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goto end;
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/*
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* When any PCM streams are already running, the available sampling
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* rate is limited at current value.
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*/
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if (amdtp_stream_pcm_running(&oxfw->tx_stream) ||
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amdtp_stream_pcm_running(&oxfw->rx_stream)) {
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err = limit_to_current_params(substream);
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if (err < 0)
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goto end;
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}
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snd_pcm_set_sync(substream);
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end:
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return err;
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@ -162,28 +217,89 @@ static int pcm_close(struct snd_pcm_substream *substream)
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return 0;
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}
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static int pcm_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *hw_params)
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static int pcm_capture_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *hw_params)
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{
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struct snd_oxfw *oxfw = substream->private_data;
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if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
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mutex_lock(&oxfw->mutex);
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oxfw->capture_substreams++;
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mutex_unlock(&oxfw->mutex);
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}
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amdtp_stream_set_pcm_format(&oxfw->tx_stream, params_format(hw_params));
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return snd_pcm_lib_alloc_vmalloc_buffer(substream,
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params_buffer_bytes(hw_params));
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}
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static int pcm_playback_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *hw_params)
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{
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struct snd_oxfw *oxfw = substream->private_data;
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if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
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mutex_lock(&oxfw->mutex);
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oxfw->playback_substreams++;
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mutex_unlock(&oxfw->mutex);
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}
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amdtp_stream_set_pcm_format(&oxfw->rx_stream, params_format(hw_params));
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return snd_pcm_lib_alloc_vmalloc_buffer(substream,
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params_buffer_bytes(hw_params));
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}
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static int pcm_hw_free(struct snd_pcm_substream *substream)
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static int pcm_capture_hw_free(struct snd_pcm_substream *substream)
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{
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struct snd_oxfw *oxfw = substream->private_data;
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mutex_lock(&oxfw->mutex);
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if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
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oxfw->capture_substreams--;
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snd_oxfw_stream_stop_simplex(oxfw, &oxfw->tx_stream);
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mutex_unlock(&oxfw->mutex);
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return snd_pcm_lib_free_vmalloc_buffer(substream);
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}
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static int pcm_playback_hw_free(struct snd_pcm_substream *substream)
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{
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struct snd_oxfw *oxfw = substream->private_data;
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mutex_lock(&oxfw->mutex);
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if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
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oxfw->playback_substreams--;
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snd_oxfw_stream_stop_simplex(oxfw, &oxfw->rx_stream);
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mutex_unlock(&oxfw->mutex);
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return snd_pcm_lib_free_vmalloc_buffer(substream);
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}
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static int pcm_prepare(struct snd_pcm_substream *substream)
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static int pcm_capture_prepare(struct snd_pcm_substream *substream)
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{
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struct snd_oxfw *oxfw = substream->private_data;
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struct snd_pcm_runtime *runtime = substream->runtime;
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int err;
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mutex_lock(&oxfw->mutex);
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err = snd_oxfw_stream_start_simplex(oxfw, &oxfw->tx_stream,
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runtime->rate, runtime->channels);
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mutex_unlock(&oxfw->mutex);
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if (err < 0)
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goto end;
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amdtp_stream_pcm_prepare(&oxfw->tx_stream);
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end:
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return err;
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}
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static int pcm_playback_prepare(struct snd_pcm_substream *substream)
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{
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struct snd_oxfw *oxfw = substream->private_data;
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struct snd_pcm_runtime *runtime = substream->runtime;
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@ -201,7 +317,25 @@ static int pcm_prepare(struct snd_pcm_substream *substream)
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return err;
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}
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static int pcm_trigger(struct snd_pcm_substream *substream, int cmd)
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static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
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{
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struct snd_oxfw *oxfw = substream->private_data;
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struct snd_pcm_substream *pcm;
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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pcm = substream;
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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pcm = NULL;
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break;
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default:
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return -EINVAL;
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}
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amdtp_stream_pcm_trigger(&oxfw->tx_stream, pcm);
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return 0;
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}
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static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
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{
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struct snd_oxfw *oxfw = substream->private_data;
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struct snd_pcm_substream *pcm;
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@ -220,35 +354,61 @@ static int pcm_trigger(struct snd_pcm_substream *substream, int cmd)
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return 0;
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}
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static snd_pcm_uframes_t pcm_pointer(struct snd_pcm_substream *substream)
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static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstm)
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{
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struct snd_oxfw *oxfw = substream->private_data;
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struct snd_oxfw *oxfw = sbstm->private_data;
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return amdtp_stream_pcm_pointer(&oxfw->tx_stream);
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}
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static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstm)
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{
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struct snd_oxfw *oxfw = sbstm->private_data;
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return amdtp_stream_pcm_pointer(&oxfw->rx_stream);
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}
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int snd_oxfw_create_pcm(struct snd_oxfw *oxfw)
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{
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static struct snd_pcm_ops ops = {
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static struct snd_pcm_ops capture_ops = {
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.open = pcm_open,
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.close = pcm_close,
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.ioctl = snd_pcm_lib_ioctl,
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.hw_params = pcm_hw_params,
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.hw_free = pcm_hw_free,
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.prepare = pcm_prepare,
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.trigger = pcm_trigger,
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.pointer = pcm_pointer,
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.hw_params = pcm_capture_hw_params,
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.hw_free = pcm_capture_hw_free,
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.prepare = pcm_capture_prepare,
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.trigger = pcm_capture_trigger,
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.pointer = pcm_capture_pointer,
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.page = snd_pcm_lib_get_vmalloc_page,
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.mmap = snd_pcm_lib_mmap_vmalloc,
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};
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static struct snd_pcm_ops playback_ops = {
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.open = pcm_open,
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.close = pcm_close,
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.ioctl = snd_pcm_lib_ioctl,
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.hw_params = pcm_playback_hw_params,
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.hw_free = pcm_playback_hw_free,
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.prepare = pcm_playback_prepare,
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.trigger = pcm_playback_trigger,
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.pointer = pcm_playback_pointer,
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.page = snd_pcm_lib_get_vmalloc_page,
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.mmap = snd_pcm_lib_mmap_vmalloc,
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};
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struct snd_pcm *pcm;
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unsigned int cap = 0;
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int err;
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err = snd_pcm_new(oxfw->card, oxfw->card->driver, 0, 1, 0, &pcm);
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if (oxfw->has_output)
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cap = 1;
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err = snd_pcm_new(oxfw->card, oxfw->card->driver, 0, 1, cap, &pcm);
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if (err < 0)
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return err;
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pcm->private_data = oxfw;
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strcpy(pcm->name, oxfw->card->shortname);
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snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &ops);
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snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops);
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if (cap > 0)
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snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops);
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return 0;
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}
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