1474 lines
37 KiB
XML
1474 lines
37 KiB
XML
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<title>DVB Audio Device</title>
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<para>The DVB audio device controls the MPEG2 audio decoder of the DVB hardware. It
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can be accessed through <emphasis role="tt">/dev/dvb/adapter0/audio0</emphasis>. Data types and and
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ioctl definitions can be accessed by including <emphasis role="tt">linux/dvb/video.h</emphasis> in your
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application.
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</para>
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<para>Please note that some DVB cards don’t have their own MPEG decoder, which results in
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the omission of the audio and video device.
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</para>
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<section id="audio_data_types">
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<title>Audio Data Types</title>
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<para>This section describes the structures, data types and defines used when talking to the
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audio device.
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</para>
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<section id="audio_stream_source_t">
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<title>audio_stream_source_t</title>
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<para>The audio stream source is set through the AUDIO_SELECT_SOURCE call and can take
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the following values, depending on whether we are replaying from an internal (demux) or
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external (user write) source.
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</para>
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<programlisting>
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typedef enum {
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AUDIO_SOURCE_DEMUX,
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AUDIO_SOURCE_MEMORY
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} audio_stream_source_t;
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</programlisting>
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<para>AUDIO_SOURCE_DEMUX selects the demultiplexer (fed either by the frontend or the
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DVR device) as the source of the video stream. If AUDIO_SOURCE_MEMORY
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is selected the stream comes from the application through the <emphasis role="tt">write()</emphasis> system
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call.
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</para>
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</section>
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<section id="audio_play_state_t">
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<title>audio_play_state_t</title>
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<para>The following values can be returned by the AUDIO_GET_STATUS call representing the
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state of audio playback.
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</para>
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<programlisting>
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typedef enum {
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AUDIO_STOPPED,
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AUDIO_PLAYING,
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AUDIO_PAUSED
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} audio_play_state_t;
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</programlisting>
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</section>
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<section id="audio_channel_select_t">
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<title>audio_channel_select_t</title>
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<para>The audio channel selected via AUDIO_CHANNEL_SELECT is determined by the
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following values.
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</para>
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<programlisting>
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typedef enum {
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AUDIO_STEREO,
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AUDIO_MONO_LEFT,
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AUDIO_MONO_RIGHT,
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} audio_channel_select_t;
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</programlisting>
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</section>
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<section id="struct_audio_status">
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<title>struct audio_status</title>
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<para>The AUDIO_GET_STATUS call returns the following structure informing about various
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states of the playback operation.
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</para>
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<programlisting>
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typedef struct audio_status {
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boolean AV_sync_state;
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boolean mute_state;
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audio_play_state_t play_state;
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audio_stream_source_t stream_source;
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audio_channel_select_t channel_select;
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boolean bypass_mode;
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} audio_status_t;
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</programlisting>
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</section>
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<section id="struct_audio_mixer">
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<title>struct audio_mixer</title>
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<para>The following structure is used by the AUDIO_SET_MIXER call to set the audio
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volume.
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</para>
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<programlisting>
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typedef struct audio_mixer {
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unsigned int volume_left;
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unsigned int volume_right;
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} audio_mixer_t;
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</programlisting>
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</section>
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<section id="audio_encodings">
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<title>audio encodings</title>
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<para>A call to AUDIO_GET_CAPABILITIES returns an unsigned integer with the following
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bits set according to the hardwares capabilities.
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</para>
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<programlisting>
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#define AUDIO_CAP_DTS 1
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#define AUDIO_CAP_LPCM 2
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#define AUDIO_CAP_MP1 4
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#define AUDIO_CAP_MP2 8
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#define AUDIO_CAP_MP3 16
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#define AUDIO_CAP_AAC 32
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#define AUDIO_CAP_OGG 64
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#define AUDIO_CAP_SDDS 128
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#define AUDIO_CAP_AC3 256
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</programlisting>
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</section>
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<section id="struct_audio_karaoke">
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<title>struct audio_karaoke</title>
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<para>The ioctl AUDIO_SET_KARAOKE uses the following format:
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</para>
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<programlisting>
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typedef
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struct audio_karaoke{
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int vocal1;
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int vocal2;
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int melody;
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} audio_karaoke_t;
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</programlisting>
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<para>If Vocal1 or Vocal2 are non-zero, they get mixed into left and right t at 70% each. If both,
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Vocal1 and Vocal2 are non-zero, Vocal1 gets mixed into the left channel and Vocal2 into the
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right channel at 100% each. Ff Melody is non-zero, the melody channel gets mixed into left
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and right.
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</para>
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</section>
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<section id="audio_attributes">
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<title>audio attributes</title>
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<para>The following attributes can be set by a call to AUDIO_SET_ATTRIBUTES:
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</para>
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<programlisting>
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typedef uint16_t audio_attributes_t;
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/⋆ bits: descr. ⋆/
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/⋆ 15-13 audio coding mode (0=ac3, 2=mpeg1, 3=mpeg2ext, 4=LPCM, 6=DTS, ⋆/
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/⋆ 12 multichannel extension ⋆/
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/⋆ 11-10 audio type (0=not spec, 1=language included) ⋆/
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/⋆ 9- 8 audio application mode (0=not spec, 1=karaoke, 2=surround) ⋆/
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/⋆ 7- 6 Quantization / DRC (mpeg audio: 1=DRC exists)(lpcm: 0=16bit, ⋆/
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/⋆ 5- 4 Sample frequency fs (0=48kHz, 1=96kHz) ⋆/
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/⋆ 2- 0 number of audio channels (n+1 channels) ⋆/
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</programlisting>
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</section></section>
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<section id="audio_function_calls">
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<title>Audio Function Calls</title>
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<section id="audio_fopen">
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<title>open()</title>
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<para>DESCRIPTION
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</para>
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<informaltable><tgroup cols="1"><tbody><row><entry
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align="char">
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<para>This system call opens a named audio device (e.g. /dev/dvb/adapter0/audio0)
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for subsequent use. When an open() call has succeeded, the device will be ready
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for use. The significance of blocking or non-blocking mode is described in the
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documentation for functions where there is a difference. It does not affect the
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semantics of the open() call itself. A device opened in blocking mode can later
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be put into non-blocking mode (and vice versa) using the F_SETFL command
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of the fcntl system call. This is a standard system call, documented in the Linux
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manual page for fcntl. Only one user can open the Audio Device in O_RDWR
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mode. All other attempts to open the device in this mode will fail, and an error
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code will be returned. If the Audio Device is opened in O_RDONLY mode, the
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only ioctl call that can be used is AUDIO_GET_STATUS. All other call will
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return with an error code.</para>
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</entry>
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</row></tbody></tgroup></informaltable>
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<para>SYNOPSIS
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</para>
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<informaltable><tgroup cols="1"><tbody><row><entry
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align="char">
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<para>int open(const char ⋆deviceName, int flags);</para>
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</entry>
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</row></tbody></tgroup></informaltable>
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<para>PARAMETERS
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</para>
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<informaltable><tgroup cols="2"><tbody><row><entry
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align="char">
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<para>const char
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*deviceName</para>
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</entry><entry
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align="char">
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<para>Name of specific audio device.</para>
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</entry>
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</row><row><entry
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align="char">
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<para>int flags</para>
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</entry><entry
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align="char">
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<para>A bit-wise OR of the following flags:</para>
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</entry>
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</row><row><entry
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align="char">
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</entry><entry
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align="char">
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<para>O_RDONLY read-only access</para>
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</entry>
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</row><row><entry
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align="char">
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</entry><entry
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align="char">
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<para>O_RDWR read/write access</para>
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</entry>
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</row><row><entry
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align="char">
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</entry><entry
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align="char">
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<para>O_NONBLOCK open in non-blocking mode</para>
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</entry>
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</row><row><entry
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align="char">
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</entry><entry
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align="char">
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<para>(blocking mode is the default)</para>
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</entry>
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</row></tbody></tgroup></informaltable>
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<para>ERRORS
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</para>
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<informaltable><tgroup cols="2"><tbody><row><entry
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align="char">
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<para>ENODEV</para>
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</entry><entry
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align="char">
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<para>Device driver not loaded/available.</para>
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</entry>
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</row><row><entry
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align="char">
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<para>EINTERNAL</para>
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</entry><entry
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align="char">
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<para>Internal error.</para>
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</entry>
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</row><row><entry
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align="char">
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<para>EBUSY</para>
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</entry><entry
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align="char">
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<para>Device or resource busy.</para>
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</entry>
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</row><row><entry
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align="char">
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<para>EINVAL</para>
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</entry><entry
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align="char">
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<para>Invalid argument.</para>
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</entry>
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</row></tbody></tgroup></informaltable>
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</section>
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<section id="audio_fclose">
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<title>close()</title>
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<para>DESCRIPTION
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</para>
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<informaltable><tgroup cols="1"><tbody><row><entry
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align="char">
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<para>This system call closes a previously opened audio device.</para>
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</entry>
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</row></tbody></tgroup></informaltable>
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<para>SYNOPSIS
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</para>
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<informaltable><tgroup cols="1"><tbody><row><entry
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align="char">
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<para>int close(int fd);</para>
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</entry>
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</row></tbody></tgroup></informaltable>
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<para>PARAMETERS
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</para>
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<informaltable><tgroup cols="2"><tbody><row><entry
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align="char">
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<para>int fd</para>
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</entry><entry
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align="char">
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<para>File descriptor returned by a previous call to open().</para>
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</entry>
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</row></tbody></tgroup></informaltable>
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<para>ERRORS
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</para>
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<informaltable><tgroup cols="2"><tbody><row><entry
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align="char">
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<para>EBADF</para>
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</entry><entry
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align="char">
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<para>fd is not a valid open file descriptor.</para>
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</entry>
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</row></tbody></tgroup></informaltable>
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</section>
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<section id="audio_fwrite">
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<title>write()</title>
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<para>DESCRIPTION
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</para>
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<informaltable><tgroup cols="1"><tbody><row><entry
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align="char">
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<para>This system call can only be used if AUDIO_SOURCE_MEMORY is selected
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in the ioctl call AUDIO_SELECT_SOURCE. The data provided shall be in
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PES format. If O_NONBLOCK is not specified the function will block until
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buffer space is available. The amount of data to be transferred is implied by
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count.</para>
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</entry>
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</row></tbody></tgroup></informaltable>
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<para>SYNOPSIS
|
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</para>
|
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<informaltable><tgroup cols="1"><tbody><row><entry
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align="char">
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<para>size_t write(int fd, const void ⋆buf, size_t count);</para>
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</entry>
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</row></tbody></tgroup></informaltable>
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||
|
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<para>PARAMETERS
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||
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</para>
|
||
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<informaltable><tgroup cols="2"><tbody><row><entry
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align="char">
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<para>int fd</para>
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</entry><entry
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align="char">
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<para>File descriptor returned by a previous call to open().</para>
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||
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</entry>
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||
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</row><row><entry
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||
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align="char">
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||
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<para>void *buf</para>
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</entry><entry
|
||
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align="char">
|
||
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<para>Pointer to the buffer containing the PES data.</para>
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||
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</entry>
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||
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</row><row><entry
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||
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align="char">
|
||
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<para>size_t count</para>
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</entry><entry
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||
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align="char">
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<para>Size of buf.</para>
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||
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</entry>
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||
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</row></tbody></tgroup></informaltable>
|
||
|
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<para>ERRORS
|
||
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</para>
|
||
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<informaltable><tgroup cols="2"><tbody><row><entry
|
||
|
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align="char">
|
||
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<para>EPERM</para>
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</entry><entry
|
||
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align="char">
|
||
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<para>Mode AUDIO_SOURCE_MEMORY not selected.</para>
|
||
|
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</entry>
|
||
|
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</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>ENOMEM</para>
|
||
|
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</entry><entry
|
||
|
|
align="char">
|
||
|
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<para>Attempted to write more data than the internal buffer can
|
||
|
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hold.</para>
|
||
|
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</entry>
|
||
|
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</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EBADF</para>
|
||
|
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</entry><entry
|
||
|
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align="char">
|
||
|
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<para>fd is not a valid open file descriptor.</para>
|
||
|
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</entry>
|
||
|
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</row></tbody></tgroup></informaltable>
|
||
|
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|
||
|
|
</section><section
|
||
|
|
role="subsection"><title>AUDIO_STOP</title>
|
||
|
|
<para>DESCRIPTION
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>This ioctl call asks the Audio Device to stop playing the current stream.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>SYNOPSIS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int ioctl(int fd, int request = AUDIO_STOP);</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>PARAMETERS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int fd</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>File descriptor returned by a previous call to open().</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int request</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Equals AUDIO_STOP for this command.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>ERRORS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EBADF</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>fd is not a valid open file descriptor</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EINTERNAL</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Internal error.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
|
||
|
|
</section><section
|
||
|
|
role="subsection"><title>AUDIO_PLAY</title>
|
||
|
|
<para>DESCRIPTION
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>This ioctl call asks the Audio Device to start playing an audio stream from the
|
||
|
|
selected source.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>SYNOPSIS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int ioctl(int fd, int request = AUDIO_PLAY);</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>PARAMETERS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int fd</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>File descriptor returned by a previous call to open().</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int request</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Equals AUDIO_PLAY for this command.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>ERRORS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EBADF</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>fd is not a valid open file descriptor</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EINTERNAL</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Internal error.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
|
||
|
|
</section><section
|
||
|
|
role="subsection"><title>AUDIO_PAUSE</title>
|
||
|
|
<para>DESCRIPTION
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>This ioctl call suspends the audio stream being played. Decoding and playing
|
||
|
|
are paused. It is then possible to restart again decoding and playing process of
|
||
|
|
the audio stream using AUDIO_CONTINUE command.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>If AUDIO_SOURCE_MEMORY is selected in the ioctl call
|
||
|
|
AUDIO_SELECT_SOURCE, the DVB-subsystem will not decode (consume)
|
||
|
|
any more data until the ioctl call AUDIO_CONTINUE or AUDIO_PLAY is
|
||
|
|
performed.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>SYNOPSIS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int ioctl(int fd, int request = AUDIO_PAUSE);</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>PARAMETERS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int fd</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>File descriptor returned by a previous call to open().</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int request</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Equals AUDIO_PAUSE for this command.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>ERRORS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EBADF</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>fd is not a valid open file descriptor.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EINTERNAL</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Internal error.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
|
||
|
|
</section><section
|
||
|
|
role="subsection"><title>AUDIO_SELECT_SOURCE</title>
|
||
|
|
<para>DESCRIPTION
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>This ioctl call informs the audio device which source shall be used
|
||
|
|
for the input data. The possible sources are demux or memory. If
|
||
|
|
AUDIO_SOURCE_MEMORY is selected, the data is fed to the Audio Device
|
||
|
|
through the write command.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>SYNOPSIS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int ioctl(int fd, int request = AUDIO_SELECT_SOURCE,
|
||
|
|
audio_stream_source_t source);</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>PARAMETERS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int fd</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>File descriptor returned by a previous call to open().</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int request</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Equals AUDIO_SELECT_SOURCE for this command.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>audio_stream_source_t
|
||
|
|
source</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Indicates the source that shall be used for the Audio
|
||
|
|
stream.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>ERRORS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EBADF</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>fd is not a valid open file descriptor.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EINTERNAL</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Internal error.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EINVAL</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Illegal input parameter.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
|
||
|
|
</section><section
|
||
|
|
role="subsection"><title>AUDIO_SET_MUTE</title>
|
||
|
|
<para>DESCRIPTION
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>This ioctl call asks the audio device to mute the stream that is currently being
|
||
|
|
played.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>SYNOPSIS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int ioctl(int fd, int request = AUDIO_SET_MUTE,
|
||
|
|
boolean state);</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>PARAMETERS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int fd</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>File descriptor returned by a previous call to open().</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int request</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Equals AUDIO_SET_MUTE for this command.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>boolean state</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Indicates if audio device shall mute or not.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>TRUE Audio Mute</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>FALSE Audio Un-mute</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>ERRORS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EBADF</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>fd is not a valid open file descriptor.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EINTERNAL</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Internal error.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EINVAL</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Illegal input parameter.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
|
||
|
|
</section><section
|
||
|
|
role="subsection"><title>AUDIO_SET_AV_SYNC</title>
|
||
|
|
<para>DESCRIPTION
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>This ioctl call asks the Audio Device to turn ON or OFF A/V synchronization.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>SYNOPSIS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int ioctl(int fd, int request = AUDIO_SET_AV_SYNC,
|
||
|
|
boolean state);</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>PARAMETERS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int fd</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>File descriptor returned by a previous call to open().</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int request</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Equals AUDIO_AV_SYNC for this command.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>boolean state</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Tells the DVB subsystem if A/V synchronization shall be
|
||
|
|
ON or OFF.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>TRUE AV-sync ON</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>FALSE AV-sync OFF</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>ERRORS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EBADF</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>fd is not a valid open file descriptor.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EINTERNAL</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Internal error.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EINVAL</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Illegal input parameter.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
|
||
|
|
</section><section
|
||
|
|
role="subsection"><title>AUDIO_SET_BYPASS_MODE</title>
|
||
|
|
<para>DESCRIPTION
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>This ioctl call asks the Audio Device to bypass the Audio decoder and forward
|
||
|
|
the stream without decoding. This mode shall be used if streams that can’t be
|
||
|
|
handled by the DVB system shall be decoded. Dolby DigitalTM streams are
|
||
|
|
automatically forwarded by the DVB subsystem if the hardware can handle it.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>SYNOPSIS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int ioctl(int fd, int request =
|
||
|
|
AUDIO_SET_BYPASS_MODE, boolean mode);</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>PARAMETERS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int fd</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>File descriptor returned by a previous call to open().</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int request</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Equals AUDIO_SET_BYPASS_MODE for this
|
||
|
|
command.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>boolean mode</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Enables or disables the decoding of the current Audio
|
||
|
|
stream in the DVB subsystem.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>TRUE Bypass is disabled</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>FALSE Bypass is enabled</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>ERRORS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EBADF</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>fd is not a valid open file descriptor.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EINTERNAL</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Internal error.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EINVAL</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Illegal input parameter.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
|
||
|
|
</section><section
|
||
|
|
role="subsection"><title>AUDIO_CHANNEL_SELECT</title>
|
||
|
|
<para>DESCRIPTION
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>This ioctl call asks the Audio Device to select the requested channel if possible.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>SYNOPSIS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int ioctl(int fd, int request =
|
||
|
|
AUDIO_CHANNEL_SELECT, audio_channel_select_t);</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>PARAMETERS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int fd</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>File descriptor returned by a previous call to open().</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int request</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Equals AUDIO_CHANNEL_SELECT for this
|
||
|
|
command.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>audio_channel_select_t
|
||
|
|
ch</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Select the output format of the audio (mono left/right,
|
||
|
|
stereo).</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>ERRORS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EBADF</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>fd is not a valid open file descriptor.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EINTERNAL</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Internal error.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EINVAL</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Illegal input parameter ch.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
|
||
|
|
</section><section
|
||
|
|
role="subsection"><title>AUDIO_GET_STATUS</title>
|
||
|
|
<para>DESCRIPTION
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>This ioctl call asks the Audio Device to return the current state of the Audio
|
||
|
|
Device.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>SYNOPSIS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int ioctl(int fd, int request = AUDIO_GET_STATUS,
|
||
|
|
struct audio_status ⋆status);</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>PARAMETERS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int fd</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>File descriptor returned by a previous call to open().</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int request</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Equals AUDIO_GET_STATUS for this command.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>struct audio_status
|
||
|
|
*status</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Returns the current state of Audio Device.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>ERRORS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EBADF</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>fd is not a valid open file descriptor.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EINTERNAL</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Internal error.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EFAULT</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>status points to invalid address.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
|
||
|
|
</section><section
|
||
|
|
role="subsection"><title>AUDIO_GET_CAPABILITIES</title>
|
||
|
|
<para>DESCRIPTION
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>This ioctl call asks the Audio Device to tell us about the decoding capabilities
|
||
|
|
of the audio hardware.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>SYNOPSIS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int ioctl(int fd, int request =
|
||
|
|
AUDIO_GET_CAPABILITIES, unsigned int ⋆cap);</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>PARAMETERS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int fd</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>File descriptor returned by a previous call to open().</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int request</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Equals AUDIO_GET_CAPABILITIES for this
|
||
|
|
command.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>unsigned int *cap</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Returns a bit array of supported sound formats.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>ERRORS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EBADF</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>fd is not a valid open file descriptor.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EINTERNAL</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Internal error.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EFAULT</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>cap points to an invalid address.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
|
||
|
|
</section><section
|
||
|
|
role="subsection"><title>AUDIO_CLEAR_BUFFER</title>
|
||
|
|
<para>DESCRIPTION
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>This ioctl call asks the Audio Device to clear all software and hardware buffers
|
||
|
|
of the audio decoder device.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>SYNOPSIS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int ioctl(int fd, int request = AUDIO_CLEAR_BUFFER);</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>PARAMETERS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int fd</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>File descriptor returned by a previous call to open().</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int request</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Equals AUDIO_CLEAR_BUFFER for this command.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>ERRORS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EBADF</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>fd is not a valid open file descriptor.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EINTERNAL</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Internal error.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
|
||
|
|
</section><section
|
||
|
|
role="subsection"><title>AUDIO_SET_ID</title>
|
||
|
|
<para>DESCRIPTION
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>This ioctl selects which sub-stream is to be decoded if a program or system
|
||
|
|
stream is sent to the video device. If no audio stream type is set the id has to be
|
||
|
|
in [0xC0,0xDF] for MPEG sound, in [0x80,0x87] for AC3 and in [0xA0,0xA7]
|
||
|
|
for LPCM. More specifications may follow for other stream types. If the stream
|
||
|
|
type is set the id just specifies the substream id of the audio stream and only
|
||
|
|
the first 5 bits are recognized.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>SYNOPSIS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int ioctl(int fd, int request = AUDIO_SET_ID, int
|
||
|
|
id);</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>PARAMETERS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int fd</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>File descriptor returned by a previous call to open().</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int request</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Equals AUDIO_SET_ID for this command.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int id</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>audio sub-stream id</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>ERRORS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EBADF</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>fd is not a valid open file descriptor.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EINTERNAL</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Internal error.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EINVAL</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Invalid sub-stream id.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
|
||
|
|
</section><section
|
||
|
|
role="subsection"><title>AUDIO_SET_MIXER</title>
|
||
|
|
<para>DESCRIPTION
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>This ioctl lets you adjust the mixer settings of the audio decoder.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>SYNOPSIS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int ioctl(int fd, int request = AUDIO_SET_MIXER,
|
||
|
|
audio_mixer_t ⋆mix);</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>PARAMETERS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int fd</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>File descriptor returned by a previous call to open().</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int request</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Equals AUDIO_SET_ID for this command.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>audio_mixer_t *mix</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>mixer settings.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>ERRORS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EBADF</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>fd is not a valid open file descriptor.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EINTERNAL</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Internal error.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EFAULT</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>mix points to an invalid address.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
|
||
|
|
</section><section
|
||
|
|
role="subsection"><title>AUDIO_SET_STREAMTYPE</title>
|
||
|
|
<para>DESCRIPTION
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>This ioctl tells the driver which kind of audio stream to expect. This is useful
|
||
|
|
if the stream offers several audio sub-streams like LPCM and AC3.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>SYNOPSIS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int ioctl(fd, int request = AUDIO_SET_STREAMTYPE,
|
||
|
|
int type);</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>PARAMETERS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int fd</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>File descriptor returned by a previous call to open().</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int request</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Equals AUDIO_SET_STREAMTYPE for this
|
||
|
|
command.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int type</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>stream type</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>ERRORS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EBADF</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>fd is not a valid open file descriptor</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EINVAL</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>type is not a valid or supported stream type.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
|
||
|
|
</section><section
|
||
|
|
role="subsection"><title>AUDIO_SET_EXT_ID</title>
|
||
|
|
<para>DESCRIPTION
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>This ioctl can be used to set the extension id for MPEG streams in DVD
|
||
|
|
playback. Only the first 3 bits are recognized.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>SYNOPSIS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int ioctl(fd, int request = AUDIO_SET_EXT_ID, int
|
||
|
|
id);</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>PARAMETERS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int fd</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>File descriptor returned by a previous call to open().</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int request</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Equals AUDIO_SET_EXT_ID for this command.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int id</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>audio sub_stream_id</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>ERRORS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EBADF</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>fd is not a valid open file descriptor</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EINVAL</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>id is not a valid id.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
|
||
|
|
</section><section
|
||
|
|
role="subsection"><title>AUDIO_SET_ATTRIBUTES</title>
|
||
|
|
<para>DESCRIPTION
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>This ioctl is intended for DVD playback and allows you to set certain
|
||
|
|
information about the audio stream.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>SYNOPSIS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int ioctl(fd, int request = AUDIO_SET_ATTRIBUTES,
|
||
|
|
audio_attributes_t attr );</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>PARAMETERS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int fd</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>File descriptor returned by a previous call to open().</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int request</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Equals AUDIO_SET_ATTRIBUTES for this command.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>audio_attributes_t
|
||
|
|
attr</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>audio attributes according to section ??</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>ERRORS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EBADF</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>fd is not a valid open file descriptor</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EINVAL</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>attr is not a valid or supported attribute setting.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
|
||
|
|
</section><section
|
||
|
|
role="subsection"><title>AUDIO_SET_KARAOKE</title>
|
||
|
|
<para>DESCRIPTION
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>This ioctl allows one to set the mixer settings for a karaoke DVD.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>SYNOPSIS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="1"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int ioctl(fd, int request = AUDIO_SET_STREAMTYPE,
|
||
|
|
audio_karaoke_t ⋆karaoke);</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>PARAMETERS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int fd</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>File descriptor returned by a previous call to open().</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>int request</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>Equals AUDIO_SET_STREAMTYPE for this
|
||
|
|
command.</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>audio_karaoke_t
|
||
|
|
*karaoke</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>karaoke settings according to section ??.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
<para>ERRORS
|
||
|
|
</para>
|
||
|
|
<informaltable><tgroup cols="2"><tbody><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EBADF</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>fd is not a valid open file descriptor</para>
|
||
|
|
</entry>
|
||
|
|
</row><row><entry
|
||
|
|
align="char">
|
||
|
|
<para>EINVAL</para>
|
||
|
|
</entry><entry
|
||
|
|
align="char">
|
||
|
|
<para>karaoke is not a valid or supported karaoke setting.</para>
|
||
|
|
</entry>
|
||
|
|
</row></tbody></tgroup></informaltable>
|
||
|
|
</section>
|
||
|
|
</section>
|