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Commit 43d414ba authored by Panagiotis Issaris's avatar Panagiotis Issaris
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Doxygenize the existing comments in avformat.h. The contents of the comments 

were left unaltered.

Originally committed as revision 8235 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent 78740240
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Showing with 63 additions and 61 deletions
libavformat/avformat.h
View file @ 43d414ba
......@@ -90,8 +90,10 @@ int av_new_packet(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);
/**
......@@ -122,7 +124,7 @@ struct AVCodecTag;
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 {
const char *filename;
unsigned char *buf;
......@@ -138,16 +140,16 @@ typedef struct AVFormatParameters {
int width;
int height;
enum PixelFormat pix_fmt;
int channel; /* used to select dv channel */
int channel; /**< used to select dv channel */
#if LIBAVFORMAT_VERSION_INT < (52<<16)
const char *device; /* video, audio or DV device */
const char *device; /**< video, audio or DV device */
#endif
const char *standard; /* tv standard, NTSC, PAL, SECAM */
int mpeg2ts_raw:1; /* force raw MPEG2 transport stream output, if possible */
int mpeg2ts_compute_pcr:1; /* compute exact PCR for each transport
const char *standard; /**< tv standard, NTSC, PAL, SECAM */
int mpeg2ts_raw:1; /**< force raw MPEG2 transport stream output, if possible */
int mpeg2ts_compute_pcr:1; /**< compute exact PCR for each transport
stream packet (only meaningful if
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) */
int prealloced_context:1;
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
#define AVFMT_NOFILE 0x0001
#define AVFMT_NEEDNUMBER 0x0002 /* needs '%d' in filename */
#define AVFMT_SHOW_IDS 0x0008 /* show format stream IDs numbers */
#define AVFMT_RAWPICTURE 0x0020 /* format wants AVPicture structure for
#define AVFMT_NEEDNUMBER 0x0002 /**< needs '%d' in filename */
#define AVFMT_SHOW_IDS 0x0008 /**< show format stream IDs numbers */
#define AVFMT_RAWPICTURE 0x0020 /**< format wants AVPicture structure for
raw picture data */
#define AVFMT_GLOBALHEADER 0x0040 /* format wants global header */
#define AVFMT_NOTIMESTAMPS 0x0080 /* format doesnt need / has any timestamps */
#define AVFMT_GENERIC_INDEX 0x0100 /* use generic index building code */
#define AVFMT_GLOBALHEADER 0x0040 /**< format wants global header */
#define AVFMT_NOTIMESTAMPS 0x0080 /**< format doesnt need / has any timestamps */
#define AVFMT_GENERIC_INDEX 0x0100 /**< use generic index building code */
typedef struct AVOutputFormat {
const char *name;
const char *long_name;
const char *mime_type;
const char *extensions; /* comma separated extensions */
/* size of private data so that it can be allocated in the wrapper */
const char *extensions; /**< comma separated extensions */
/** size of private data so that it can be allocated in the wrapper */
int priv_data_size;
/* output support */
enum CodecID audio_codec; /* default audio codec */
enum CodecID video_codec; /* default video codec */
enum CodecID audio_codec; /**< default audio codec */
enum CodecID video_codec; /**< default video codec */
int (*write_header)(struct AVFormatContext *);
int (*write_packet)(struct AVFormatContext *, AVPacket *pkt);
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;
/* 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 (*interleave_packet)(struct AVFormatContext *, AVPacket *out, AVPacket *in, int flush);
......@@ -196,21 +198,21 @@ typedef struct AVOutputFormat {
typedef struct AVInputFormat {
const char *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;
/* 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 *);
/* 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
additionnal paramters. Only used in raw format right
now. 'av_new_stream' should be called to create new streams. */
int (*read_header)(struct AVFormatContext *,
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
AVFMTCTX_NOHEADER is used. */
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 */
int (*read_close)(struct AVFormatContext *);
/**
......@@ -227,20 +229,20 @@ typedef struct AVInputFormat {
*/
int64_t (*read_timestamp)(struct AVFormatContext *s, int stream_index,
int64_t *pos, int64_t pos_limit);
/* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
/** can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
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
reliable enough */
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;
/* start/resume playing - only meaningful if using a network based format
/** start/resume playing - only meaningful if using a network based format
(RTSP) */
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) */
int (*read_pause)(struct AVFormatContext *);
......@@ -256,13 +258,13 @@ typedef struct AVIndexEntry {
#define AVINDEX_KEYFRAME 0x0001
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 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;
typedef struct AVStream {
int index; /* stream index in AVFormatContext */
int id; /* format specific stream id */
AVCodecContext *codec; /* codec context */
int index; /**< stream index in AVFormatContext */
int id; /**< format specific stream id */
AVCodecContext *codec; /**< codec context */
/**
* real base frame rate of the stream.
* 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() */
int64_t codec_info_duration;
int codec_info_nb_frames;
/* encoding: PTS generation when outputing stream */
/** encoding: PTS generation when outputing stream */
AVFrac pts;
/**
......@@ -286,22 +288,22 @@ typedef struct AVStream {
* identically 1.
*/
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 */
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
//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 */
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. */
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. */
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 */
int need_parsing; ///< 1->full parsing needed, 2->only parse headers dont repack
......@@ -311,7 +313,7 @@ typedef struct AVStream {
int last_IP_duration;
int64_t last_IP_pts;
/* 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 */
int nb_index_entries;
unsigned int index_entries_allocated_size;
......@@ -322,14 +324,14 @@ typedef struct AVStream {
int64_t pts_buffer[MAX_REORDER_DELAY+1];
} 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) */
#define MAX_STREAMS 20
/* format I/O context */
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 */
struct AVInputFormat *iformat;
struct AVOutputFormat *oformat;
......@@ -337,7 +339,7 @@ typedef struct AVFormatContext {
ByteIOContext pb;
unsigned int nb_streams;
AVStream *streams[MAX_STREAMS];
char filename[1024]; /* input or output filename */
char filename[1024]; /**< input or output filename */
/* stream info */
int64_t timestamp;
char title[512];
......@@ -345,28 +347,28 @@ typedef struct AVFormatContext {
char copyright[512];
char comment[512];
char album[512];
int year; /* ID3 year, 0 if none */
int track; /* track number, 0 if none */
char genre[32]; /* ID3 genre */
int year; /**< ID3 year, 0 if none */
int track; /**< track number, 0 if none */
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) */
/* 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
streams */
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:
it is deduced from the AVStream values. */
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
AVStream values. */
int64_t duration;
/* decoding: total file size. 0 if unknown */
/** decoding: total file size. 0 if unknown */
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
duration are known as ffmpeg can compute it automatically. */
int bit_rate;
......@@ -378,7 +380,7 @@ typedef struct AVFormatContext {
AVPacket cur_pkt;
/* 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 mux_rate;
......@@ -388,7 +390,7 @@ typedef struct AVFormatContext {
#define AVFMT_NOOUTPUTLOOP -1
#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 flags;
......@@ -396,7 +398,7 @@ typedef struct AVFormatContext {
#define AVFMT_FLAG_IGNIDX 0x0002 ///< ignore index
int loop_input;
/* decoding: size of data to probe; encoding unused */
/** decoding: size of data to probe; encoding unused */
unsigned int probesize;
/**
......@@ -457,7 +459,7 @@ void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
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);
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,
int buf_size,
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);
/**
......@@ -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 ));
/* media file output */
/** media file output */
int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
/**
......
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