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Doxygenize the existing comments in avformat.h. The contents of the comments

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Originally committed as revision 8235 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Panagiotis Issaris 2007-03-05 00:23:23 +00:00
parent 7874024062
commit 43d414ba2a
1 changed files with 63 additions and 61 deletions
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124
libavformat/avformat.h
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@ -90,8 +90,10 @@ int av_new_packet(AVPacket *pkt, int size);
*/ */
int av_get_packet(ByteIOContext *s, AVPacket *pkt, int size); int av_get_packet(ByteIOContext *s, AVPacket *pkt, int size);
/* This is a hack - the packet memory allocation stuff is broken. The /**
packet is allocated if it was not really allocated */ * @warning This is a hack - the packet memory allocation stuff is broken. The
* packet is allocated if it was not really allocated
*/
int av_dup_packet(AVPacket *pkt); int av_dup_packet(AVPacket *pkt);
/** /**
@ -122,7 +124,7 @@ struct AVCodecTag;
struct AVFormatContext; struct AVFormatContext;
/* this structure contains the data a format has to probe a file */ /** this structure contains the data a format has to probe a file */
typedef struct AVProbeData { typedef struct AVProbeData {
const char *filename; const char *filename;
unsigned char *buf; unsigned char *buf;
@ -138,16 +140,16 @@ typedef struct AVFormatParameters {
int width; int width;
int height; int height;
enum PixelFormat pix_fmt; enum PixelFormat pix_fmt;
int channel; /* used to select dv channel */ int channel; /**< used to select dv channel */
#if LIBAVFORMAT_VERSION_INT < (52<<16) #if LIBAVFORMAT_VERSION_INT < (52<<16)
const char *device; /* video, audio or DV device */ const char *device; /**< video, audio or DV device */
#endif #endif
const char *standard; /* tv standard, NTSC, PAL, SECAM */ const char *standard; /**< tv standard, NTSC, PAL, SECAM */
int mpeg2ts_raw:1; /* force raw MPEG2 transport stream output, if possible */ int mpeg2ts_raw:1; /**< force raw MPEG2 transport stream output, if possible */
int mpeg2ts_compute_pcr:1; /* compute exact PCR for each transport int mpeg2ts_compute_pcr:1; /**< compute exact PCR for each transport
stream packet (only meaningful if stream packet (only meaningful if
mpeg2ts_raw is TRUE */ mpeg2ts_raw is TRUE */
int initial_pause:1; /* do not begin to play the stream int initial_pause:1; /**< do not begin to play the stream
immediately (RTSP only) */ immediately (RTSP only) */
int prealloced_context:1; int prealloced_context:1;
enum CodecID video_codec_id; enum CodecID video_codec_id;
@ -156,30 +158,30 @@ typedef struct AVFormatParameters {
//! demuxer will use url_fopen, no opened file should be provided by the caller //! demuxer will use url_fopen, no opened file should be provided by the caller
#define AVFMT_NOFILE 0x0001 #define AVFMT_NOFILE 0x0001
#define AVFMT_NEEDNUMBER 0x0002 /* needs '%d' in filename */ #define AVFMT_NEEDNUMBER 0x0002 /**< needs '%d' in filename */
#define AVFMT_SHOW_IDS 0x0008 /* show format stream IDs numbers */ #define AVFMT_SHOW_IDS 0x0008 /**< show format stream IDs numbers */
#define AVFMT_RAWPICTURE 0x0020 /* format wants AVPicture structure for #define AVFMT_RAWPICTURE 0x0020 /**< format wants AVPicture structure for
raw picture data */ raw picture data */
#define AVFMT_GLOBALHEADER 0x0040 /* format wants global header */ #define AVFMT_GLOBALHEADER 0x0040 /**< format wants global header */
#define AVFMT_NOTIMESTAMPS 0x0080 /* format doesnt need / has any timestamps */ #define AVFMT_NOTIMESTAMPS 0x0080 /**< format doesnt need / has any timestamps */
#define AVFMT_GENERIC_INDEX 0x0100 /* use generic index building code */ #define AVFMT_GENERIC_INDEX 0x0100 /**< use generic index building code */
typedef struct AVOutputFormat { typedef struct AVOutputFormat {
const char *name; const char *name;
const char *long_name; const char *long_name;
const char *mime_type; const char *mime_type;
const char *extensions; /* comma separated extensions */ const char *extensions; /**< comma separated extensions */
/* size of private data so that it can be allocated in the wrapper */ /** size of private data so that it can be allocated in the wrapper */
int priv_data_size; int priv_data_size;
/* output support */ /* output support */
enum CodecID audio_codec; /* default audio codec */ enum CodecID audio_codec; /**< default audio codec */
enum CodecID video_codec; /* default video codec */ enum CodecID video_codec; /**< default video codec */
int (*write_header)(struct AVFormatContext *); int (*write_header)(struct AVFormatContext *);
int (*write_packet)(struct AVFormatContext *, AVPacket *pkt); int (*write_packet)(struct AVFormatContext *, AVPacket *pkt);
int (*write_trailer)(struct AVFormatContext *); int (*write_trailer)(struct AVFormatContext *);
/* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_GLOBALHEADER */ /** can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_GLOBALHEADER */
int flags; int flags;
/* currently only used to set pixel format if not YUV420P */ /** currently only used to set pixel format if not YUV420P */
int (*set_parameters)(struct AVFormatContext *, AVFormatParameters *); int (*set_parameters)(struct AVFormatContext *, AVFormatParameters *);
int (*interleave_packet)(struct AVFormatContext *, AVPacket *out, AVPacket *in, int flush); int (*interleave_packet)(struct AVFormatContext *, AVPacket *out, AVPacket *in, int flush);
@ -196,21 +198,21 @@ typedef struct AVOutputFormat {
typedef struct AVInputFormat { typedef struct AVInputFormat {
const char *name; const char *name;
const char *long_name; const char *long_name;
/* size of private data so that it can be allocated in the wrapper */ /** size of private data so that it can be allocated in the wrapper */
int priv_data_size; int priv_data_size;
/* tell if a given file has a chance of being parsing by this format */ /** tell if a given file has a chance of being parsing by this format */
int (*read_probe)(AVProbeData *); int (*read_probe)(AVProbeData *);
/* read the format header and initialize the AVFormatContext /** read the format header and initialize the AVFormatContext
structure. Return 0 if OK. 'ap' if non NULL contains structure. Return 0 if OK. 'ap' if non NULL contains
additionnal paramters. Only used in raw format right additionnal paramters. Only used in raw format right
now. 'av_new_stream' should be called to create new streams. */ now. 'av_new_stream' should be called to create new streams. */
int (*read_header)(struct AVFormatContext *, int (*read_header)(struct AVFormatContext *,
AVFormatParameters *ap); AVFormatParameters *ap);
/* read one packet and put it in 'pkt'. pts and flags are also /** read one packet and put it in 'pkt'. pts and flags are also
set. 'av_new_stream' can be called only if the flag set. 'av_new_stream' can be called only if the flag
AVFMTCTX_NOHEADER is used. */ AVFMTCTX_NOHEADER is used. */
int (*read_packet)(struct AVFormatContext *, AVPacket *pkt); int (*read_packet)(struct AVFormatContext *, AVPacket *pkt);
/* close the stream. The AVFormatContext and AVStreams are not /** close the stream. The AVFormatContext and AVStreams are not
freed by this function */ freed by this function */
int (*read_close)(struct AVFormatContext *); int (*read_close)(struct AVFormatContext *);
/** /**
@ -227,20 +229,20 @@ typedef struct AVInputFormat {
*/ */
int64_t (*read_timestamp)(struct AVFormatContext *s, int stream_index, int64_t (*read_timestamp)(struct AVFormatContext *s, int stream_index,
int64_t *pos, int64_t pos_limit); int64_t *pos, int64_t pos_limit);
/* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */ /** can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
int flags; int flags;
/* if extensions are defined, then no probe is done. You should /** if extensions are defined, then no probe is done. You should
usually not use extension format guessing because it is not usually not use extension format guessing because it is not
reliable enough */ reliable enough */
const char *extensions; const char *extensions;
/* general purpose read only value that the format can use */ /** general purpose read only value that the format can use */
int value; int value;
/* start/resume playing - only meaningful if using a network based format /** start/resume playing - only meaningful if using a network based format
(RTSP) */ (RTSP) */
int (*read_play)(struct AVFormatContext *); int (*read_play)(struct AVFormatContext *);
/* pause playing - only meaningful if using a network based format /** pause playing - only meaningful if using a network based format
(RTSP) */ (RTSP) */
int (*read_pause)(struct AVFormatContext *); int (*read_pause)(struct AVFormatContext *);
@ -256,13 +258,13 @@ typedef struct AVIndexEntry {
#define AVINDEX_KEYFRAME 0x0001 #define AVINDEX_KEYFRAME 0x0001
int flags:2; int flags:2;
int size:30; //yeah trying to keep the size of this small to reduce memory requirements (its 24 vs 32 byte due to possible 8byte align) int size:30; //yeah trying to keep the size of this small to reduce memory requirements (its 24 vs 32 byte due to possible 8byte align)
int min_distance; /* min distance between this and the previous keyframe, used to avoid unneeded searching */ int min_distance; /**< min distance between this and the previous keyframe, used to avoid unneeded searching */
} AVIndexEntry; } AVIndexEntry;
typedef struct AVStream { typedef struct AVStream {
int index; /* stream index in AVFormatContext */ int index; /**< stream index in AVFormatContext */
int id; /* format specific stream id */ int id; /**< format specific stream id */
AVCodecContext *codec; /* codec context */ AVCodecContext *codec; /**< codec context */
/** /**
* real base frame rate of the stream. * real base frame rate of the stream.
* this is the lowest framerate with which all timestamps can be * this is the lowest framerate with which all timestamps can be
@ -276,7 +278,7 @@ typedef struct AVStream {
/* internal data used in av_find_stream_info() */ /* internal data used in av_find_stream_info() */
int64_t codec_info_duration; int64_t codec_info_duration;
int codec_info_nb_frames; int codec_info_nb_frames;
/* encoding: PTS generation when outputing stream */ /** encoding: PTS generation when outputing stream */
AVFrac pts; AVFrac pts;
/** /**
@ -286,22 +288,22 @@ typedef struct AVStream {
* identically 1. * identically 1.
*/ */
AVRational time_base; AVRational time_base;
int pts_wrap_bits; /* number of bits in pts (used for wrapping control) */ int pts_wrap_bits; /**< number of bits in pts (used for wrapping control) */
/* ffmpeg.c private use */ /* ffmpeg.c private use */
int stream_copy; /* if TRUE, just copy stream */ int stream_copy; /* *<if TRUE, just copy stream */
enum AVDiscard discard; ///< selects which packets can be discarded at will and dont need to be demuxed enum AVDiscard discard; ///< selects which packets can be discarded at will and dont need to be demuxed
//FIXME move stuff to a flags field? //FIXME move stuff to a flags field?
/* quality, as it has been removed from AVCodecContext and put in AVVideoFrame /** quality, as it has been removed from AVCodecContext and put in AVVideoFrame
* MN:dunno if thats the right place, for it */ * MN:dunno if thats the right place, for it */
float quality; float quality;
/* decoding: position of the first frame of the component, in /** decoding: position of the first frame of the component, in
AV_TIME_BASE fractional seconds. */ AV_TIME_BASE fractional seconds. */
int64_t start_time; int64_t start_time;
/* decoding: duration of the stream, in AV_TIME_BASE fractional /** decoding: duration of the stream, in AV_TIME_BASE fractional
seconds. */ seconds. */
int64_t duration; int64_t duration;
char language[4]; /* ISO 639 3-letter language code (empty string if undefined) */ char language[4]; /** ISO 639 3-letter language code (empty string if undefined) */
/* av_read_frame() support */ /* av_read_frame() support */
int need_parsing; ///< 1->full parsing needed, 2->only parse headers dont repack int need_parsing; ///< 1->full parsing needed, 2->only parse headers dont repack
@ -311,7 +313,7 @@ typedef struct AVStream {
int last_IP_duration; int last_IP_duration;
int64_t last_IP_pts; int64_t last_IP_pts;
/* av_seek_frame() support */ /* av_seek_frame() support */
AVIndexEntry *index_entries; /* only used if the format does not AVIndexEntry *index_entries; /**< only used if the format does not
support seeking natively */ support seeking natively */
int nb_index_entries; int nb_index_entries;
unsigned int index_entries_allocated_size; unsigned int index_entries_allocated_size;
@ -322,14 +324,14 @@ typedef struct AVStream {
int64_t pts_buffer[MAX_REORDER_DELAY+1]; int64_t pts_buffer[MAX_REORDER_DELAY+1];
} AVStream; } AVStream;
#define AVFMTCTX_NOHEADER 0x0001 /* signal that no header is present #define AVFMTCTX_NOHEADER 0x0001 /**< signal that no header is present
(streams are added dynamically) */ (streams are added dynamically) */
#define MAX_STREAMS 20 #define MAX_STREAMS 20
/* format I/O context */ /* format I/O context */
typedef struct AVFormatContext { typedef struct AVFormatContext {
const AVClass *av_class; /* set by av_alloc_format_context */ const AVClass *av_class; /**< set by av_alloc_format_context */
/* can only be iformat or oformat, not both at the same time */ /* can only be iformat or oformat, not both at the same time */
struct AVInputFormat *iformat; struct AVInputFormat *iformat;
struct AVOutputFormat *oformat; struct AVOutputFormat *oformat;
@ -337,7 +339,7 @@ typedef struct AVFormatContext {
ByteIOContext pb; ByteIOContext pb;
unsigned int nb_streams; unsigned int nb_streams;
AVStream *streams[MAX_STREAMS]; AVStream *streams[MAX_STREAMS];
char filename[1024]; /* input or output filename */ char filename[1024]; /**< input or output filename */
/* stream info */ /* stream info */
int64_t timestamp; int64_t timestamp;
char title[512]; char title[512];
@ -345,28 +347,28 @@ typedef struct AVFormatContext {
char copyright[512]; char copyright[512];
char comment[512]; char comment[512];
char album[512]; char album[512];
int year; /* ID3 year, 0 if none */ int year; /**< ID3 year, 0 if none */
int track; /* track number, 0 if none */ int track; /**< track number, 0 if none */
char genre[32]; /* ID3 genre */ char genre[32]; /**< ID3 genre */
int ctx_flags; /* format specific flags, see AVFMTCTX_xx */ int ctx_flags; /**< format specific flags, see AVFMTCTX_xx */
/* private data for pts handling (do not modify directly) */ /* private data for pts handling (do not modify directly) */
/* This buffer is only needed when packets were already buffered but /** This buffer is only needed when packets were already buffered but
not decoded, for example to get the codec parameters in mpeg not decoded, for example to get the codec parameters in mpeg
streams */ streams */
struct AVPacketList *packet_buffer; struct AVPacketList *packet_buffer;
/* decoding: position of the first frame of the component, in /** decoding: position of the first frame of the component, in
AV_TIME_BASE fractional seconds. NEVER set this value directly: AV_TIME_BASE fractional seconds. NEVER set this value directly:
it is deduced from the AVStream values. */ it is deduced from the AVStream values. */
int64_t start_time; int64_t start_time;
/* decoding: duration of the stream, in AV_TIME_BASE fractional /** decoding: duration of the stream, in AV_TIME_BASE fractional
seconds. NEVER set this value directly: it is deduced from the seconds. NEVER set this value directly: it is deduced from the
AVStream values. */ AVStream values. */
int64_t duration; int64_t duration;
/* decoding: total file size. 0 if unknown */ /** decoding: total file size. 0 if unknown */
int64_t file_size; int64_t file_size;
/* decoding: total stream bitrate in bit/s, 0 if not /** decoding: total stream bitrate in bit/s, 0 if not
available. Never set it directly if the file_size and the available. Never set it directly if the file_size and the
duration are known as ffmpeg can compute it automatically. */ duration are known as ffmpeg can compute it automatically. */
int bit_rate; int bit_rate;
@ -378,7 +380,7 @@ typedef struct AVFormatContext {
AVPacket cur_pkt; AVPacket cur_pkt;
/* av_seek_frame() support */ /* av_seek_frame() support */
int64_t data_offset; /* offset of the first packet */ int64_t data_offset; /** offset of the first packet */
int index_built; int index_built;
int mux_rate; int mux_rate;
@ -388,7 +390,7 @@ typedef struct AVFormatContext {
#define AVFMT_NOOUTPUTLOOP -1 #define AVFMT_NOOUTPUTLOOP -1
#define AVFMT_INFINITEOUTPUTLOOP 0 #define AVFMT_INFINITEOUTPUTLOOP 0
/* number of times to loop output in formats that support it */ /** number of times to loop output in formats that support it */
int loop_output; int loop_output;
int flags; int flags;
@ -396,7 +398,7 @@ typedef struct AVFormatContext {
#define AVFMT_FLAG_IGNIDX 0x0002 ///< ignore index #define AVFMT_FLAG_IGNIDX 0x0002 ///< ignore index
int loop_input; int loop_input;
/* decoding: size of data to probe; encoding unused */ /** decoding: size of data to probe; encoding unused */
unsigned int probesize; unsigned int probesize;
/** /**
@ -457,7 +459,7 @@ void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
void av_register_all(void); void av_register_all(void);
/* codec tag <-> codec id */ /** codec tag <-> codec id */
enum CodecID av_codec_get_id(const struct AVCodecTag **tags, unsigned int tag); enum CodecID av_codec_get_id(const struct AVCodecTag **tags, unsigned int tag);
unsigned int av_codec_get_tag(const struct AVCodecTag **tags, enum CodecID id); unsigned int av_codec_get_tag(const struct AVCodecTag **tags, enum CodecID id);
@ -499,7 +501,7 @@ int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
AVInputFormat *fmt, AVInputFormat *fmt,
int buf_size, int buf_size,
AVFormatParameters *ap); AVFormatParameters *ap);
/* no av_open for output, so applications will need this: */ /** no av_open for output, so applications will need this: */
AVFormatContext *av_alloc_format_context(void); AVFormatContext *av_alloc_format_context(void);
/** /**
@ -656,7 +658,7 @@ void av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp);
*/ */
int64_t av_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts, int64_t pos_min, int64_t pos_max, int64_t pos_limit, int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret, int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t )); int64_t av_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts, int64_t pos_min, int64_t pos_max, int64_t pos_limit, int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret, int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
/* media file output */ /** media file output */
int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap); int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
/** /**