summaryrefslogtreecommitdiffstats
path: root/Documentation/DocBook/media/dvb/audio.xml
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/DocBook/media/dvb/audio.xml')
-rw-r--r--Documentation/DocBook/media/dvb/audio.xml1203
1 files changed, 0 insertions, 1203 deletions
diff --git a/Documentation/DocBook/media/dvb/audio.xml b/Documentation/DocBook/media/dvb/audio.xml
deleted file mode 100644
index d643862..0000000
--- a/Documentation/DocBook/media/dvb/audio.xml
+++ /dev/null
@@ -1,1203 +0,0 @@
-<title>DVB Audio Device</title>
-<para>The DVB audio device controls the MPEG2 audio decoder of the DVB hardware. It
-can be accessed through <emphasis role="tt">/dev/dvb/adapter0/audio0</emphasis>. Data types and and
-ioctl definitions can be accessed by including <emphasis role="tt">linux/dvb/video.h</emphasis> in your
-application.
-</para>
-<para>Please note that some DVB cards don&#8217;t have their own MPEG decoder, which results in
-the omission of the audio and video device.
-</para>
-
-<section id="audio_data_types">
-<title>Audio Data Types</title>
-<para>This section describes the structures, data types and defines used when talking to the
-audio device.
-</para>
-
-<section id="audio-stream-source-t">
-<title>audio_stream_source_t</title>
-<para>The audio stream source is set through the AUDIO_SELECT_SOURCE call and can take
-the following values, depending on whether we are replaying from an internal (demux) or
-external (user write) source.
-</para>
-<programlisting>
-typedef enum {
- AUDIO_SOURCE_DEMUX,
- AUDIO_SOURCE_MEMORY
-} audio_stream_source_t;
-</programlisting>
-<para>AUDIO_SOURCE_DEMUX selects the demultiplexer (fed either by the frontend or the
-DVR device) as the source of the video stream. If AUDIO_SOURCE_MEMORY
-is selected the stream comes from the application through the <emphasis role="tt">write()</emphasis> system
-call.
-</para>
-
-</section>
-<section id="audio-play-state-t">
-<title>audio_play_state_t</title>
-<para>The following values can be returned by the AUDIO_GET_STATUS call representing the
-state of audio playback.
-</para>
-<programlisting>
-typedef enum {
- AUDIO_STOPPED,
- AUDIO_PLAYING,
- AUDIO_PAUSED
-} audio_play_state_t;
-</programlisting>
-
-</section>
-<section id="audio-channel-select-t">
-<title>audio_channel_select_t</title>
-<para>The audio channel selected via AUDIO_CHANNEL_SELECT is determined by the
-following values.
-</para>
-<programlisting>
-typedef enum {
- AUDIO_STEREO,
- AUDIO_MONO_LEFT,
- AUDIO_MONO_RIGHT,
- AUDIO_MONO,
- AUDIO_STEREO_SWAPPED
-} audio_channel_select_t;
-</programlisting>
-
-</section>
-<section id="audio-status">
-<title>struct audio_status</title>
-<para>The AUDIO_GET_STATUS call returns the following structure informing about various
-states of the playback operation.
-</para>
-<programlisting>
-typedef struct audio_status {
- boolean AV_sync_state;
- boolean mute_state;
- audio_play_state_t play_state;
- audio_stream_source_t stream_source;
- audio_channel_select_t channel_select;
- boolean bypass_mode;
- audio_mixer_t mixer_state;
-} audio_status_t;
-</programlisting>
-
-</section>
-<section id="audio-mixer">
-<title>struct audio_mixer</title>
-<para>The following structure is used by the AUDIO_SET_MIXER call to set the audio
-volume.
-</para>
-<programlisting>
-typedef struct audio_mixer {
- unsigned int volume_left;
- unsigned int volume_right;
-} audio_mixer_t;
-</programlisting>
-
-</section>
-<section id="audio_encodings">
-<title>audio encodings</title>
-<para>A call to AUDIO_GET_CAPABILITIES returns an unsigned integer with the following
-bits set according to the hardwares capabilities.
-</para>
-<programlisting>
- #define AUDIO_CAP_DTS 1
- #define AUDIO_CAP_LPCM 2
- #define AUDIO_CAP_MP1 4
- #define AUDIO_CAP_MP2 8
- #define AUDIO_CAP_MP3 16
- #define AUDIO_CAP_AAC 32
- #define AUDIO_CAP_OGG 64
- #define AUDIO_CAP_SDDS 128
- #define AUDIO_CAP_AC3 256
-</programlisting>
-
-</section>
-<section id="audio-karaoke">
-<title>struct audio_karaoke</title>
-<para>The ioctl AUDIO_SET_KARAOKE uses the following format:
-</para>
-<programlisting>
-typedef
-struct audio_karaoke {
- int vocal1;
- int vocal2;
- int melody;
-} audio_karaoke_t;
-</programlisting>
-<para>If Vocal1 or Vocal2 are non-zero, they get mixed into left and right t at 70% each. If both,
-Vocal1 and Vocal2 are non-zero, Vocal1 gets mixed into the left channel and Vocal2 into the
-right channel at 100% each. Ff Melody is non-zero, the melody channel gets mixed into left
-and right.
-</para>
-
-</section>
-<section id="audio-attributes-t">
-<title>audio attributes</title>
-<para>The following attributes can be set by a call to AUDIO_SET_ATTRIBUTES:
-</para>
-<programlisting>
- typedef uint16_t audio_attributes_t;
- /&#x22C6; bits: descr. &#x22C6;/
- /&#x22C6; 15-13 audio coding mode (0=ac3, 2=mpeg1, 3=mpeg2ext, 4=LPCM, 6=DTS, &#x22C6;/
- /&#x22C6; 12 multichannel extension &#x22C6;/
- /&#x22C6; 11-10 audio type (0=not spec, 1=language included) &#x22C6;/
- /&#x22C6; 9- 8 audio application mode (0=not spec, 1=karaoke, 2=surround) &#x22C6;/
- /&#x22C6; 7- 6 Quantization / DRC (mpeg audio: 1=DRC exists)(lpcm: 0=16bit, &#x22C6;/
- /&#x22C6; 5- 4 Sample frequency fs (0=48kHz, 1=96kHz) &#x22C6;/
- /&#x22C6; 2- 0 number of audio channels (n+1 channels) &#x22C6;/
-</programlisting>
- </section></section>
-<section id="audio_function_calls">
-<title>Audio Function Calls</title>
-
-
-<section id="audio_fopen">
-<title>open()</title>
-<para>DESCRIPTION
-</para>
-<informaltable><tgroup cols="1"><tbody><row><entry
- align="char">
-<para>This system call opens a named audio device (e.g. /dev/dvb/adapter0/audio0)
- for subsequent use. When an open() call has succeeded, the device will be ready
- for use. The significance of blocking or non-blocking mode is described in the
- documentation for functions where there is a difference. It does not affect the
- semantics of the open() call itself. A device opened in blocking mode can later
- be put into non-blocking mode (and vice versa) using the F_SETFL command
- of the fcntl system call. This is a standard system call, documented in the Linux
- manual page for fcntl. Only one user can open the Audio Device in O_RDWR
- mode. All other attempts to open the device in this mode will fail, and an error
- code will be returned. If the Audio Device is opened in O_RDONLY mode, the
- only ioctl call that can be used is AUDIO_GET_STATUS. All other call will
- return with an error code.</para>
-</entry>
- </row></tbody></tgroup></informaltable>
-<para>SYNOPSIS
-</para>
-<informaltable><tgroup cols="1"><tbody><row><entry
- align="char">
-<para>int open(const char &#x22C6;deviceName, int flags);</para>
-</entry>
- </row></tbody></tgroup></informaltable>
-<para>PARAMETERS
-</para>
-<informaltable><tgroup cols="2"><tbody><row><entry
- align="char">
-<para>const char
- *deviceName</para>
-</entry><entry
- align="char">
-<para>Name of specific audio device.</para>
-</entry>
- </row><row><entry
- align="char">
-<para>int flags</para>
-</entry><entry
- align="char">
-<para>A bit-wise OR of the following flags:</para>
-</entry>
- </row><row><entry
- align="char">
-</entry><entry
- align="char">
-<para>O_RDONLY read-only access</para>
-</entry>
- </row><row><entry
- align="char">
-</entry><entry
- align="char">
-<para>O_RDWR read/write access</para>
-</entry>
- </row><row><entry
- align="char">
-</entry><entry
- align="char">
-<para>O_NONBLOCK open in non-blocking mode</para>
-</entry>
- </row><row><entry
- align="char">
-</entry><entry
- align="char">
-<para>(blocking mode is the default)</para>
-</entry>
- </row></tbody></tgroup></informaltable>
-<para>RETURN VALUE</para>
-<informaltable><tgroup cols="2"><tbody><row><entry
- align="char">
-<para>ENODEV</para>
-</entry><entry
- align="char">
-<para>Device driver not loaded/available.</para>
-</entry>
- </row><row><entry
- align="char">
-<para>EBUSY</para>
-</entry><entry
- align="char">
-<para>Device or resource busy.</para>
-</entry>
- </row><row><entry
- align="char">
-<para>EINVAL</para>
-</entry><entry
- align="char">
-<para>Invalid argument.</para>
-</entry>
- </row></tbody></tgroup></informaltable>
-
-</section>
-<section id="audio_fclose">
-<title>close()</title>
-<para>DESCRIPTION
-</para>
-<informaltable><tgroup cols="1"><tbody><row><entry
- align="char">
-<para>This system call closes a previously opened audio device.</para>
-</entry>
- </row></tbody></tgroup></informaltable>
-<para>SYNOPSIS
-</para>
-<informaltable><tgroup cols="1"><tbody><row><entry
- align="char">
-<para>int close(int fd);</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></tbody></tgroup></informaltable>
-<para>RETURN VALUE</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></tbody></tgroup></informaltable>
-
-</section>
-<section id="audio_fwrite">
-<title>write()</title>
-<para>DESCRIPTION
-</para>
-<informaltable><tgroup cols="1"><tbody><row><entry
- align="char">
-<para>This system call can only be used if AUDIO_SOURCE_MEMORY is selected
- in the ioctl call AUDIO_SELECT_SOURCE. The data provided shall be in
- PES format. If O_NONBLOCK is not specified the function will block until
- buffer space is available. The amount of data to be transferred is implied by
- count.</para>
-</entry>
- </row></tbody></tgroup></informaltable>
-<para>SYNOPSIS
-</para>
-<informaltable><tgroup cols="1"><tbody><row><entry
- align="char">
-<para>size_t write(int fd, const void &#x22C6;buf, size_t count);</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>void *buf</para>
-</entry><entry
- align="char">
-<para>Pointer to the buffer containing the PES data.</para>
-</entry>
- </row><row><entry
- align="char">
-<para>size_t count</para>
-</entry><entry
- align="char">
-<para>Size of buf.</para>
-</entry>
- </row></tbody></tgroup></informaltable>
-<para>RETURN VALUE</para>
-<informaltable><tgroup cols="2"><tbody><row><entry
- align="char">
-<para>EPERM</para>
-</entry><entry
- align="char">
-<para>Mode AUDIO_SOURCE_MEMORY not selected.</para>
-</entry>
- </row><row><entry
- align="char">
-<para>ENOMEM</para>
-</entry><entry
- align="char">
-<para>Attempted to write more data than the internal buffer can
- hold.</para>
-</entry>
- </row><row><entry
- align="char">
-<para>EBADF</para>
-</entry><entry
- align="char">
-<para>fd is not a valid open file descriptor.</para>
-</entry>
- </row></tbody></tgroup></informaltable>
-
-</section><section id="AUDIO_STOP"
-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>
-&return-value-dvb;
-
-</section><section id="AUDIO_PLAY"
-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>
-&return-value-dvb;
-
-</section><section id="AUDIO_PAUSE"
-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>
-&return-value-dvb;
-
-</section><section id="AUDIO_CONTINUE"
-role="subsection"><title>AUDIO_CONTINUE</title>
-<para>DESCRIPTION
-</para>
-<informaltable><tgroup cols="1"><tbody><row><entry
- align="char">
-<para>This ioctl restarts the decoding and playing process previously paused
-with AUDIO_PAUSE command.</para>
-</entry>
- </row><row><entry
- align="char">
-<para>It only works if the stream were previously stopped with AUDIO_PAUSE</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_CONTINUE);</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_CONTINUE for this command.</para>
-</entry>
- </row></tbody></tgroup></informaltable>
-&return-value-dvb;
-
-</section><section id="AUDIO_SELECT_SOURCE"
-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>
-&return-value-dvb;
-
-</section><section id="AUDIO_SET_MUTE"
-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>
-&return-value-dvb;
-
-</section><section id="AUDIO_SET_AV_SYNC"
-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>
-&return-value-dvb;
-
-</section><section id="AUDIO_SET_BYPASS_MODE"
-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&#8217;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>
-&return-value-dvb;
-
-</section><section id="AUDIO_CHANNEL_SELECT"
-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>
-&return-value-dvb;
-
-</section><section id="AUDIO_GET_STATUS"
-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 &#x22C6;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>
-&return-value-dvb;
-
-</section><section id="AUDIO_GET_CAPABILITIES"
-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 &#x22C6;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>
-&return-value-dvb;
-
-</section><section id="AUDIO_CLEAR_BUFFER"
-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>
-&return-value-dvb;
-
-</section><section id="AUDIO_SET_ID"
-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>
-&return-value-dvb;
-
-</section><section id="AUDIO_SET_MIXER"
-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 &#x22C6;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>
-&return-value-dvb;
-
-</section><section id="AUDIO_SET_STREAMTYPE"
-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>
-&return-value-dvb;
-<informaltable><tgroup cols="2"><tbody><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 id="AUDIO_SET_EXT_ID"
-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>
-&return-value-dvb;
-<informaltable><tgroup cols="2"><tbody><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 id="AUDIO_SET_ATTRIBUTES"
-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>
-&return-value-dvb;
-<informaltable><tgroup cols="2"><tbody><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 id="AUDIO_SET_KARAOKE"
-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_KARAOKE,
- audio_karaoke_t &#x22C6;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_KARAOKE 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>
-&return-value-dvb;
-<informaltable><tgroup cols="2"><tbody><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>