From b1925f2e1cd368f6eeb3887442c9ecd05d32c04b Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Mon, 4 Jul 2016 12:15:56 -0300 Subject: [PATCH] doc-rst: audio_function_calls: improve man-like format Parsing this file were causing lots of warnings with sphinx, due to the c function prototypes. Fix that by prepending them with .. cpp:function:: While here, use the same way we document man-like pages, at the V4L side of the book and add escapes to asterisks. Signed-off-by: Mauro Carvalho Chehab --- .../linux_tv/media/dvb/audio_function_calls.rst | 356 +++++++++++++-------- 1 file changed, 220 insertions(+), 136 deletions(-) diff --git a/Documentation/linux_tv/media/dvb/audio_function_calls.rst b/Documentation/linux_tv/media/dvb/audio_function_calls.rst index b3408b7..118444e 100644 --- a/Documentation/linux_tv/media/dvb/audio_function_calls.rst +++ b/Documentation/linux_tv/media/dvb/audio_function_calls.rst @@ -9,10 +9,11 @@ Audio Function Calls .. _audio_fopen: -open() -====== +DVB audio open() +================ -DESCRIPTION +Description +----------- This system call opens a named audio device (e.g. /dev/dvb/adapter0/audio0) for subsequent use. When an open() call has @@ -28,11 +29,13 @@ 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. -SYNOPSIS +Synopsis +-------- -int open(const char *deviceName, int flags); +.. c:function:: int open(const char *deviceName, int flags) -PARAMETERS +Arguments +---------- @@ -43,7 +46,7 @@ PARAMETERS - .. row 1 - - const char *deviceName + - const char \*deviceName - Name of specific audio device. @@ -74,7 +77,8 @@ PARAMETERS - (blocking mode is the default) -RETURN VALUE +Return Value +------------ @@ -105,18 +109,21 @@ RETURN VALUE .. _audio_fclose: -close() -======= +DVB audio close() +================= -DESCRIPTION +Description +----------- This system call closes a previously opened audio device. -SYNOPSIS +Synopsis +-------- -int close(int fd); +.. c:function:: int close(int fd) -PARAMETERS +Arguments +---------- @@ -132,7 +139,8 @@ PARAMETERS - File descriptor returned by a previous call to open(). -RETURN VALUE +Return Value +------------ @@ -151,10 +159,11 @@ RETURN VALUE .. _audio_fwrite: -write() -======= +DVB audio write() +================= -DESCRIPTION +Description +----------- 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 @@ -162,11 +171,13 @@ 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. -SYNOPSIS +Synopsis +-------- -size_t write(int fd, const void *buf, size_t count); +.. c:function:: size_t write(int fd, const void *buf, size_t count) -PARAMETERS +Arguments +---------- @@ -183,7 +194,7 @@ PARAMETERS - .. row 2 - - void *buf + - void \*buf - Pointer to the buffer containing the PES data. @@ -194,7 +205,8 @@ PARAMETERS - Size of buf. -RETURN VALUE +Return Value +------------ @@ -228,16 +240,19 @@ RETURN VALUE AUDIO_STOP ========== -DESCRIPTION +Description +----------- This ioctl call asks the Audio Device to stop playing the current stream. -SYNOPSIS +Synopsis +-------- -int ioctl(int fd, int request = AUDIO_STOP); +.. c:function:: int ioctl(int fd, int request = AUDIO_STOP) -PARAMETERS +Arguments +---------- @@ -259,7 +274,8 @@ PARAMETERS - Equals AUDIO_STOP for this command. -RETURN VALUE +Return Value +------------ On success 0 is returned, on error -1 and the ``errno`` variable is set appropriately. The generic error codes are described at the @@ -271,16 +287,19 @@ appropriately. The generic error codes are described at the AUDIO_PLAY ========== -DESCRIPTION +Description +----------- This ioctl call asks the Audio Device to start playing an audio stream from the selected source. -SYNOPSIS +Synopsis +-------- -int ioctl(int fd, int request = AUDIO_PLAY); +.. c:function:: int ioctl(int fd, int request = AUDIO_PLAY) -PARAMETERS +Arguments +---------- @@ -302,7 +321,8 @@ PARAMETERS - Equals AUDIO_PLAY for this command. -RETURN VALUE +Return Value +------------ On success 0 is returned, on error -1 and the ``errno`` variable is set appropriately. The generic error codes are described at the @@ -314,17 +334,20 @@ appropriately. The generic error codes are described at the AUDIO_PAUSE =========== -DESCRIPTION +Description +----------- 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. -SYNOPSIS +Synopsis +-------- -int ioctl(int fd, int request = AUDIO_PAUSE); +.. c:function:: int ioctl(int fd, int request = AUDIO_PAUSE) -PARAMETERS +Arguments +---------- @@ -346,7 +369,8 @@ PARAMETERS - Equals AUDIO_PAUSE for this command. -RETURN VALUE +Return Value +------------ On success 0 is returned, on error -1 and the ``errno`` variable is set appropriately. The generic error codes are described at the @@ -358,16 +382,19 @@ appropriately. The generic error codes are described at the AUDIO_CONTINUE ============== -DESCRIPTION +Description +----------- This ioctl restarts the decoding and playing process previously paused with AUDIO_PAUSE command. -SYNOPSIS +Synopsis +-------- -int ioctl(int fd, int request = AUDIO_CONTINUE); +.. c:function:: int ioctl(int fd, int request = AUDIO_CONTINUE) -PARAMETERS +Arguments +---------- @@ -389,7 +416,8 @@ PARAMETERS - Equals AUDIO_CONTINUE for this command. -RETURN VALUE +Return Value +------------ On success 0 is returned, on error -1 and the ``errno`` variable is set appropriately. The generic error codes are described at the @@ -401,19 +429,21 @@ appropriately. The generic error codes are described at the AUDIO_SELECT_SOURCE =================== -DESCRIPTION +Description +----------- 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. -SYNOPSIS +Synopsis +-------- -int ioctl(int fd, int request = AUDIO_SELECT_SOURCE, -audio_stream_source_t source); +.. c:function:: int ioctl(int fd, int request = AUDIO_SELECT_SOURCE, audio_stream_source_t source) -PARAMETERS +Arguments +---------- @@ -441,7 +471,8 @@ PARAMETERS - Indicates the source that shall be used for the Audio stream. -RETURN VALUE +Return Value +------------ On success 0 is returned, on error -1 and the ``errno`` variable is set appropriately. The generic error codes are described at the @@ -453,7 +484,8 @@ appropriately. The generic error codes are described at the AUDIO_SET_MUTE ============== -DESCRIPTION +Description +----------- This ioctl is for DVB devices only. To control a V4L2 decoder use the V4L2 :ref:`VIDIOC_DECODER_CMD` with the @@ -462,11 +494,13 @@ V4L2 :ref:`VIDIOC_DECODER_CMD` with the This ioctl call asks the audio device to mute the stream that is currently being played. -SYNOPSIS +Synopsis +-------- -int ioctl(int fd, int request = AUDIO_SET_MUTE, boolean state); +.. c:function:: int ioctl(int fd, int request = AUDIO_SET_MUTE, boolean state) -PARAMETERS +Arguments +---------- @@ -504,7 +538,8 @@ PARAMETERS - FALSE Audio Un-mute -RETURN VALUE +Return Value +------------ On success 0 is returned, on error -1 and the ``errno`` variable is set appropriately. The generic error codes are described at the @@ -516,16 +551,19 @@ appropriately. The generic error codes are described at the AUDIO_SET_AV_SYNC ================= -DESCRIPTION +Description +----------- This ioctl call asks the Audio Device to turn ON or OFF A/V synchronization. -SYNOPSIS +Synopsis +-------- -int ioctl(int fd, int request = AUDIO_SET_AV_SYNC, boolean state); +.. c:function:: int ioctl(int fd, int request = AUDIO_SET_AV_SYNC, boolean state) -PARAMETERS +Arguments +---------- @@ -563,7 +601,8 @@ PARAMETERS - FALSE AV-sync OFF -RETURN VALUE +Return Value +------------ On success 0 is returned, on error -1 and the ``errno`` variable is set appropriately. The generic error codes are described at the @@ -575,7 +614,8 @@ appropriately. The generic error codes are described at the AUDIO_SET_BYPASS_MODE ===================== -DESCRIPTION +Description +----------- 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 @@ -583,11 +623,13 @@ 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. -SYNOPSIS +Synopsis +-------- -int ioctl(int fd, int request = AUDIO_SET_BYPASS_MODE, boolean mode); +.. c:function:: int ioctl(int fd, int request = AUDIO_SET_BYPASS_MODE, boolean mode) -PARAMETERS +Arguments +---------- @@ -626,7 +668,8 @@ PARAMETERS - FALSE Bypass is enabled -RETURN VALUE +Return Value +------------ On success 0 is returned, on error -1 and the ``errno`` variable is set appropriately. The generic error codes are described at the @@ -638,7 +681,8 @@ appropriately. The generic error codes are described at the AUDIO_CHANNEL_SELECT ==================== -DESCRIPTION +Description +----------- This ioctl is for DVB devices only. To control a V4L2 decoder use the V4L2 ``V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK`` control instead. @@ -646,12 +690,13 @@ V4L2 ``V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK`` control instead. This ioctl call asks the Audio Device to select the requested channel if possible. -SYNOPSIS +Synopsis +-------- -int ioctl(int fd, int request = AUDIO_CHANNEL_SELECT, -audio_channel_select_t); +.. c:function:: int ioctl(int fd, int request = AUDIO_CHANNEL_SELECT, audio_channel_select_t) -PARAMETERS +Arguments +---------- @@ -679,7 +724,8 @@ PARAMETERS - Select the output format of the audio (mono left/right, stereo). -RETURN VALUE +Return Value +------------ On success 0 is returned, on error -1 and the ``errno`` variable is set appropriately. The generic error codes are described at the @@ -691,7 +737,8 @@ appropriately. The generic error codes are described at the AUDIO_BILINGUAL_CHANNEL_SELECT ============================== -DESCRIPTION +Description +----------- This ioctl is obsolete. Do not use in new drivers. It has been replaced by the V4L2 ``V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK`` control @@ -700,12 +747,13 @@ for MPEG decoders controlled through V4L2. This ioctl call asks the Audio Device to select the requested channel for bilingual streams if possible. -SYNOPSIS +Synopsis +-------- -int ioctl(int fd, int request = AUDIO_BILINGUAL_CHANNEL_SELECT, -audio_channel_select_t); +.. c:function:: int ioctl(int fd, int request = AUDIO_BILINGUAL_CHANNEL_SELECT, audio_channel_select_t) -PARAMETERS +Arguments +---------- @@ -733,7 +781,8 @@ PARAMETERS - Select the output format of the audio (mono left/right, stereo). -RETURN VALUE +Return Value +------------ On success 0 is returned, on error -1 and the ``errno`` variable is set appropriately. The generic error codes are described at the @@ -745,7 +794,8 @@ appropriately. The generic error codes are described at the AUDIO_GET_PTS ============= -DESCRIPTION +Description +----------- This ioctl is obsolete. Do not use in new drivers. If you need this functionality, then please contact the linux-media mailing list @@ -754,11 +804,13 @@ functionality, then please contact the linux-media mailing list This ioctl call asks the Audio Device to return the current PTS timestamp. -SYNOPSIS +Synopsis +-------- -int ioctl(int fd, int request = AUDIO_GET_PTS, __u64 *pts); +.. c:function:: int ioctl(int fd, int request = AUDIO_GET_PTS, __u64 *pts) -PARAMETERS +Arguments +---------- @@ -781,7 +833,7 @@ PARAMETERS - .. row 3 - - __u64 *pts + - __u64 \*pts - Returns the 33-bit timestamp as defined in ITU T-REC-H.222.0 / ISO/IEC 13818-1. @@ -791,7 +843,8 @@ PARAMETERS decoded frame or the last PTS extracted by the PES parser. -RETURN VALUE +Return Value +------------ On success 0 is returned, on error -1 and the ``errno`` variable is set appropriately. The generic error codes are described at the @@ -803,17 +856,19 @@ appropriately. The generic error codes are described at the AUDIO_GET_STATUS ================ -DESCRIPTION +Description +----------- This ioctl call asks the Audio Device to return the current state of the Audio Device. -SYNOPSIS +Synopsis +-------- -int ioctl(int fd, int request = AUDIO_GET_STATUS, struct audio_status -*status); +.. c:function:: int ioctl(int fd, int request = AUDIO_GET_STATUS, struct audio_status *status) -PARAMETERS +Arguments +---------- @@ -836,12 +891,13 @@ PARAMETERS - .. row 3 - - struct audio_status *status + - struct audio_status \*status - Returns the current state of Audio Device. -RETURN VALUE +Return Value +------------ On success 0 is returned, on error -1 and the ``errno`` variable is set appropriately. The generic error codes are described at the @@ -853,17 +909,19 @@ appropriately. The generic error codes are described at the AUDIO_GET_CAPABILITIES ====================== -DESCRIPTION +Description +----------- This ioctl call asks the Audio Device to tell us about the decoding capabilities of the audio hardware. -SYNOPSIS +Synopsis +-------- -int ioctl(int fd, int request = AUDIO_GET_CAPABILITIES, unsigned int -*cap); +.. c:function:: int ioctl(int fd, int request = AUDIO_GET_CAPABILITIES, unsigned int *cap) -PARAMETERS +Arguments +---------- @@ -886,12 +944,13 @@ PARAMETERS - .. row 3 - - unsigned int *cap + - unsigned int \*cap - Returns a bit array of supported sound formats. -RETURN VALUE +Return Value +------------ On success 0 is returned, on error -1 and the ``errno`` variable is set appropriately. The generic error codes are described at the @@ -903,16 +962,19 @@ appropriately. The generic error codes are described at the AUDIO_CLEAR_BUFFER ================== -DESCRIPTION +Description +----------- This ioctl call asks the Audio Device to clear all software and hardware buffers of the audio decoder device. -SYNOPSIS +Synopsis +-------- -int ioctl(int fd, int request = AUDIO_CLEAR_BUFFER); +.. c:function:: int ioctl(int fd, int request = AUDIO_CLEAR_BUFFER) -PARAMETERS +Arguments +---------- @@ -934,7 +996,8 @@ PARAMETERS - Equals AUDIO_CLEAR_BUFFER for this command. -RETURN VALUE +Return Value +------------ On success 0 is returned, on error -1 and the ``errno`` variable is set appropriately. The generic error codes are described at the @@ -946,7 +1009,8 @@ appropriately. The generic error codes are described at the AUDIO_SET_ID ============ -DESCRIPTION +Description +----------- 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 @@ -956,11 +1020,13 @@ 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. -SYNOPSIS +Synopsis +-------- -int ioctl(int fd, int request = AUDIO_SET_ID, int id); +.. c:function:: int ioctl(int fd, int request = AUDIO_SET_ID, int id) -PARAMETERS +Arguments +---------- @@ -988,7 +1054,8 @@ PARAMETERS - audio sub-stream id -RETURN VALUE +Return Value +------------ On success 0 is returned, on error -1 and the ``errno`` variable is set appropriately. The generic error codes are described at the @@ -1000,16 +1067,18 @@ appropriately. The generic error codes are described at the AUDIO_SET_MIXER =============== -DESCRIPTION +Description +----------- This ioctl lets you adjust the mixer settings of the audio decoder. -SYNOPSIS +Synopsis +-------- -int ioctl(int fd, int request = AUDIO_SET_MIXER, audio_mixer_t -*mix); +.. c:function:: int ioctl(int fd, int request = AUDIO_SET_MIXER, audio_mixer_t *mix) -PARAMETERS +Arguments +---------- @@ -1032,12 +1101,13 @@ PARAMETERS - .. row 3 - - audio_mixer_t *mix + - audio_mixer_t \*mix - mixer settings. -RETURN VALUE +Return Value +------------ On success 0 is returned, on error -1 and the ``errno`` variable is set appropriately. The generic error codes are described at the @@ -1049,17 +1119,20 @@ appropriately. The generic error codes are described at the AUDIO_SET_STREAMTYPE ==================== -DESCRIPTION +Description +----------- 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. -SYNOPSIS +Synopsis +-------- -int ioctl(fd, int request = AUDIO_SET_STREAMTYPE, int type); +.. c:function:: int ioctl(fd, int request = AUDIO_SET_STREAMTYPE, int type) -PARAMETERS +Arguments +---------- @@ -1087,7 +1160,8 @@ PARAMETERS - stream type -RETURN VALUE +Return Value +------------ On success 0 is returned, on error -1 and the ``errno`` variable is set appropriately. The generic error codes are described at the @@ -1113,16 +1187,19 @@ appropriately. The generic error codes are described at the AUDIO_SET_EXT_ID ================ -DESCRIPTION +Description +----------- This ioctl can be used to set the extension id for MPEG streams in DVD playback. Only the first 3 bits are recognized. -SYNOPSIS +Synopsis +-------- -int ioctl(fd, int request = AUDIO_SET_EXT_ID, int id); +.. c:function:: int ioctl(fd, int request = AUDIO_SET_EXT_ID, int id) -PARAMETERS +Arguments +---------- @@ -1150,7 +1227,8 @@ PARAMETERS - audio sub_stream_id -RETURN VALUE +Return Value +------------ On success 0 is returned, on error -1 and the ``errno`` variable is set appropriately. The generic error codes are described at the @@ -1176,17 +1254,19 @@ appropriately. The generic error codes are described at the AUDIO_SET_ATTRIBUTES ==================== -DESCRIPTION +Description +----------- This ioctl is intended for DVD playback and allows you to set certain information about the audio stream. -SYNOPSIS +Synopsis +-------- -int ioctl(fd, int request = AUDIO_SET_ATTRIBUTES, audio_attributes_t -attr ); +.. c:function:: int ioctl(fd, int request = AUDIO_SET_ATTRIBUTES, audio_attributes_t attr ) -PARAMETERS +Arguments +---------- @@ -1214,7 +1294,8 @@ PARAMETERS - audio attributes according to section ?? -RETURN VALUE +Return Value +------------ On success 0 is returned, on error -1 and the ``errno`` variable is set appropriately. The generic error codes are described at the @@ -1240,16 +1321,18 @@ appropriately. The generic error codes are described at the AUDIO_SET_KARAOKE ================= -DESCRIPTION +Description +----------- This ioctl allows one to set the mixer settings for a karaoke DVD. -SYNOPSIS +Synopsis +-------- -int ioctl(fd, int request = AUDIO_SET_KARAOKE, audio_karaoke_t -*karaoke); +.. c:function:: int ioctl(fd, int request = AUDIO_SET_KARAOKE, audio_karaoke_t *karaoke) -PARAMETERS +Arguments +---------- @@ -1272,12 +1355,13 @@ PARAMETERS - .. row 3 - - audio_karaoke_t *karaoke + - audio_karaoke_t \*karaoke - karaoke settings according to section ??. -RETURN VALUE +Return Value +------------ On success 0 is returned, on error -1 and the ``errno`` variable is set appropriately. The generic error codes are described at the -- 2.7.4