e3c97c3be4
Originally committed as revision 6982 to svn://svn.ffmpeg.org/ffmpeg/trunk
539 lines
19 KiB
C
539 lines
19 KiB
C
/*
|
|
* copyright (c) 2001 Fabrice Bellard
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#ifndef AVFORMAT_H
|
|
#define AVFORMAT_H
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#define LIBAVFORMAT_VERSION_INT ((51<<16)+(6<<8)+0)
|
|
#define LIBAVFORMAT_VERSION 51.6.0
|
|
#define LIBAVFORMAT_BUILD LIBAVFORMAT_VERSION_INT
|
|
|
|
#define LIBAVFORMAT_IDENT "Lavf" AV_STRINGIFY(LIBAVFORMAT_VERSION)
|
|
|
|
#include <time.h>
|
|
#include <stdio.h> /* FILE */
|
|
#include "avcodec.h"
|
|
|
|
#include "avio.h"
|
|
|
|
/* packet functions */
|
|
|
|
#ifndef MAXINT64
|
|
#define MAXINT64 int64_t_C(0x7fffffffffffffff)
|
|
#endif
|
|
|
|
#ifndef MININT64
|
|
#define MININT64 int64_t_C(0x8000000000000000)
|
|
#endif
|
|
|
|
typedef struct AVPacket {
|
|
int64_t pts; ///< presentation time stamp in time_base units
|
|
int64_t dts; ///< decompression time stamp in time_base units
|
|
uint8_t *data;
|
|
int size;
|
|
int stream_index;
|
|
int flags;
|
|
int duration; ///< presentation duration in time_base units (0 if not available)
|
|
void (*destruct)(struct AVPacket *);
|
|
void *priv;
|
|
int64_t pos; ///< byte position in stream, -1 if unknown
|
|
} AVPacket;
|
|
#define PKT_FLAG_KEY 0x0001
|
|
|
|
void av_destruct_packet_nofree(AVPacket *pkt);
|
|
void av_destruct_packet(AVPacket *pkt);
|
|
|
|
/* initialize optional fields of a packet */
|
|
static inline void av_init_packet(AVPacket *pkt)
|
|
{
|
|
pkt->pts = AV_NOPTS_VALUE;
|
|
pkt->dts = AV_NOPTS_VALUE;
|
|
pkt->pos = -1;
|
|
pkt->duration = 0;
|
|
pkt->flags = 0;
|
|
pkt->stream_index = 0;
|
|
pkt->destruct= av_destruct_packet_nofree;
|
|
}
|
|
|
|
int av_new_packet(AVPacket *pkt, int size);
|
|
int av_get_packet(ByteIOContext *s, AVPacket *pkt, int size);
|
|
int av_dup_packet(AVPacket *pkt);
|
|
|
|
/**
|
|
* Free a packet
|
|
*
|
|
* @param pkt packet to free
|
|
*/
|
|
static inline void av_free_packet(AVPacket *pkt)
|
|
{
|
|
if (pkt && pkt->destruct) {
|
|
pkt->destruct(pkt);
|
|
}
|
|
}
|
|
|
|
/*************************************************/
|
|
/* fractional numbers for exact pts handling */
|
|
|
|
/* the exact value of the fractional number is: 'val + num / den'. num
|
|
is assumed to be such as 0 <= num < den */
|
|
typedef struct AVFrac {
|
|
int64_t val, num, den;
|
|
} AVFrac attribute_deprecated;
|
|
|
|
/*************************************************/
|
|
/* input/output formats */
|
|
|
|
struct AVFormatContext;
|
|
|
|
/* this structure contains the data a format has to probe a file */
|
|
typedef struct AVProbeData {
|
|
const char *filename;
|
|
unsigned char *buf;
|
|
int buf_size;
|
|
} AVProbeData;
|
|
|
|
#define AVPROBE_SCORE_MAX 100 ///< max score, half of that is used for file extension based detection
|
|
|
|
typedef struct AVFormatParameters {
|
|
AVRational time_base;
|
|
int sample_rate;
|
|
int channels;
|
|
int width;
|
|
int height;
|
|
enum PixelFormat pix_fmt;
|
|
int channel; /* used to select dv channel */
|
|
const char *device; /* video, audio or DV device */
|
|
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
|
|
immediately (RTSP only) */
|
|
int prealloced_context:1;
|
|
enum CodecID video_codec_id;
|
|
enum CodecID audio_codec_id;
|
|
} AVFormatParameters;
|
|
|
|
#define AVFMT_NOFILE 0x0001 /* no file should be opened */
|
|
#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 */
|
|
|
|
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 */
|
|
int priv_data_size;
|
|
/* output support */
|
|
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 */
|
|
int flags;
|
|
/* 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);
|
|
/* private fields */
|
|
struct AVOutputFormat *next;
|
|
} AVOutputFormat;
|
|
|
|
typedef struct AVInputFormat {
|
|
const char *name;
|
|
const char *long_name;
|
|
/* 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 */
|
|
int (*read_probe)(AVProbeData *);
|
|
/* 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
|
|
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
|
|
freed by this function */
|
|
int (*read_close)(struct AVFormatContext *);
|
|
/**
|
|
* seek to a given timestamp relative to the frames in
|
|
* stream component stream_index
|
|
* @param stream_index must not be -1
|
|
* @param flags selects which direction should be preferred if no exact
|
|
* match is available
|
|
*/
|
|
int (*read_seek)(struct AVFormatContext *,
|
|
int stream_index, int64_t timestamp, int flags);
|
|
/**
|
|
* gets the next timestamp in AV_TIME_BASE units.
|
|
*/
|
|
int64_t (*read_timestamp)(struct AVFormatContext *s, int stream_index,
|
|
int64_t *pos, int64_t pos_limit);
|
|
/* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
|
|
int flags;
|
|
/* 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 */
|
|
int value;
|
|
|
|
/* 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
|
|
(RTSP) */
|
|
int (*read_pause)(struct AVFormatContext *);
|
|
|
|
/* private fields */
|
|
struct AVInputFormat *next;
|
|
} AVInputFormat;
|
|
|
|
typedef struct AVIndexEntry {
|
|
int64_t pos;
|
|
int64_t timestamp;
|
|
#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 */
|
|
} AVIndexEntry;
|
|
|
|
typedef struct AVStream {
|
|
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
|
|
* represented accurately (its the least common multiple of all
|
|
* framerates in the stream), Note, this value is just a guess!
|
|
* for example if the timebase is 1/90000 and all frames have either
|
|
* approximately 3600 or 1800 timer ticks then r_frame_rate will be 50/1
|
|
*/
|
|
AVRational r_frame_rate;
|
|
void *priv_data;
|
|
/* internal data used in av_find_stream_info() */
|
|
int64_t codec_info_duration;
|
|
int codec_info_nb_frames;
|
|
/* encoding: PTS generation when outputing stream */
|
|
AVFrac pts;
|
|
|
|
/**
|
|
* this is the fundamental unit of time (in seconds) in terms
|
|
* of which frame timestamps are represented. for fixed-fps content,
|
|
* timebase should be 1/framerate and timestamp increments should be
|
|
* identically 1.
|
|
*/
|
|
AVRational time_base;
|
|
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 */
|
|
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
|
|
* MN:dunno if thats the right place, for it */
|
|
float quality;
|
|
/* 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
|
|
seconds. */
|
|
int64_t duration;
|
|
|
|
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
|
|
struct AVCodecParserContext *parser;
|
|
|
|
int64_t cur_dts;
|
|
int last_IP_duration;
|
|
int64_t last_IP_pts;
|
|
/* av_seek_frame() support */
|
|
AVIndexEntry *index_entries; /* only used if the format does not
|
|
support seeking natively */
|
|
int nb_index_entries;
|
|
unsigned int index_entries_allocated_size;
|
|
|
|
int64_t nb_frames; ///< number of frames in this stream if known or 0
|
|
|
|
#define MAX_REORDER_DELAY 4
|
|
int64_t pts_buffer[MAX_REORDER_DELAY+1];
|
|
} AVStream;
|
|
|
|
#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 */
|
|
/* can only be iformat or oformat, not both at the same time */
|
|
struct AVInputFormat *iformat;
|
|
struct AVOutputFormat *oformat;
|
|
void *priv_data;
|
|
ByteIOContext pb;
|
|
int nb_streams;
|
|
AVStream *streams[MAX_STREAMS];
|
|
char filename[1024]; /* input or output filename */
|
|
/* stream info */
|
|
int64_t timestamp;
|
|
char title[512];
|
|
char author[512];
|
|
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 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
|
|
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
|
|
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
|
|
seconds. NEVER set this value directly: it is deduced from the
|
|
AVStream values. */
|
|
int64_t duration;
|
|
/* decoding: total file size. 0 if unknown */
|
|
int64_t file_size;
|
|
/* 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;
|
|
|
|
/* av_read_frame() support */
|
|
AVStream *cur_st;
|
|
const uint8_t *cur_ptr;
|
|
int cur_len;
|
|
AVPacket cur_pkt;
|
|
|
|
/* av_seek_frame() support */
|
|
int64_t data_offset; /* offset of the first packet */
|
|
int index_built;
|
|
|
|
int mux_rate;
|
|
int packet_size;
|
|
int preload;
|
|
int max_delay;
|
|
|
|
#define AVFMT_NOOUTPUTLOOP -1
|
|
#define AVFMT_INFINITEOUTPUTLOOP 0
|
|
/* number of times to loop output in formats that support it */
|
|
int loop_output;
|
|
|
|
int flags;
|
|
#define AVFMT_FLAG_GENPTS 0x0001 ///< generate pts if missing even if it requires parsing future frames
|
|
#define AVFMT_FLAG_IGNIDX 0x0002 ///< ignore index
|
|
|
|
int loop_input;
|
|
/* decoding: size of data to probe; encoding unused */
|
|
unsigned int probesize;
|
|
} AVFormatContext;
|
|
|
|
typedef struct AVPacketList {
|
|
AVPacket pkt;
|
|
struct AVPacketList *next;
|
|
} AVPacketList;
|
|
|
|
extern AVInputFormat *first_iformat;
|
|
extern AVOutputFormat *first_oformat;
|
|
|
|
enum CodecID av_guess_image2_codec(const char *filename);
|
|
|
|
/* XXX: use automatic init with either ELF sections or C file parser */
|
|
/* modules */
|
|
|
|
#include "rtp.h"
|
|
|
|
#include "rtsp.h"
|
|
|
|
/* utils.c */
|
|
void av_register_input_format(AVInputFormat *format);
|
|
void av_register_output_format(AVOutputFormat *format);
|
|
AVOutputFormat *guess_stream_format(const char *short_name,
|
|
const char *filename, const char *mime_type);
|
|
AVOutputFormat *guess_format(const char *short_name,
|
|
const char *filename, const char *mime_type);
|
|
enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
|
|
const char *filename, const char *mime_type, enum CodecType type);
|
|
|
|
void av_hex_dump(FILE *f, uint8_t *buf, int size);
|
|
void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
|
|
|
|
void av_register_all(void);
|
|
|
|
/* media file input */
|
|
AVInputFormat *av_find_input_format(const char *short_name);
|
|
AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
|
|
int av_open_input_stream(AVFormatContext **ic_ptr,
|
|
ByteIOContext *pb, const char *filename,
|
|
AVInputFormat *fmt, AVFormatParameters *ap);
|
|
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: */
|
|
AVFormatContext *av_alloc_format_context(void);
|
|
|
|
#define AVERROR_UNKNOWN (-1) /* unknown error */
|
|
#define AVERROR_IO (-2) /* i/o error */
|
|
#define AVERROR_NUMEXPECTED (-3) /* number syntax expected in filename */
|
|
#define AVERROR_INVALIDDATA (-4) /* invalid data found */
|
|
#define AVERROR_NOMEM (-5) /* not enough memory */
|
|
#define AVERROR_NOFMT (-6) /* unknown format */
|
|
#define AVERROR_NOTSUPP (-7) /* operation not supported */
|
|
|
|
int av_find_stream_info(AVFormatContext *ic);
|
|
int av_read_packet(AVFormatContext *s, AVPacket *pkt);
|
|
int av_read_frame(AVFormatContext *s, AVPacket *pkt);
|
|
int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags);
|
|
int av_read_play(AVFormatContext *s);
|
|
int av_read_pause(AVFormatContext *s);
|
|
void av_close_input_file(AVFormatContext *s);
|
|
AVStream *av_new_stream(AVFormatContext *s, int id);
|
|
void av_set_pts_info(AVStream *s, int pts_wrap_bits,
|
|
int pts_num, int pts_den);
|
|
|
|
#define AVSEEK_FLAG_BACKWARD 1 ///< seek backward
|
|
#define AVSEEK_FLAG_BYTE 2 ///< seeking based on position in bytes
|
|
#define AVSEEK_FLAG_ANY 4 ///< seek to any frame, even non keyframes
|
|
|
|
int av_find_default_stream_index(AVFormatContext *s);
|
|
int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags);
|
|
int av_add_index_entry(AVStream *st,
|
|
int64_t pos, int64_t timestamp, int size, int distance, int flags);
|
|
int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags);
|
|
void av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp);
|
|
|
|
/* media file output */
|
|
int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
|
|
int av_write_header(AVFormatContext *s);
|
|
int av_write_frame(AVFormatContext *s, AVPacket *pkt);
|
|
int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt);
|
|
int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush);
|
|
|
|
int av_write_trailer(AVFormatContext *s);
|
|
|
|
void dump_format(AVFormatContext *ic,
|
|
int index,
|
|
const char *url,
|
|
int is_output);
|
|
int parse_image_size(int *width_ptr, int *height_ptr, const char *str);
|
|
int parse_frame_rate(int *frame_rate, int *frame_rate_base, const char *arg);
|
|
int64_t parse_date(const char *datestr, int duration);
|
|
|
|
int64_t av_gettime(void);
|
|
|
|
/* ffm specific for ffserver */
|
|
#define FFM_PACKET_SIZE 4096
|
|
offset_t ffm_read_write_index(int fd);
|
|
void ffm_write_write_index(int fd, offset_t pos);
|
|
void ffm_set_write_index(AVFormatContext *s, offset_t pos, offset_t file_size);
|
|
|
|
int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
|
|
|
|
int av_get_frame_filename(char *buf, int buf_size,
|
|
const char *path, int number);
|
|
int av_filename_number_test(const char *filename);
|
|
|
|
/* grab specific */
|
|
int video_grab_init(void);
|
|
int audio_init(void);
|
|
|
|
/* DV1394 */
|
|
int dv1394_init(void);
|
|
int dc1394_init(void);
|
|
|
|
#ifdef HAVE_AV_CONFIG_H
|
|
|
|
#include "os_support.h"
|
|
|
|
int strstart(const char *str, const char *val, const char **ptr);
|
|
int stristart(const char *str, const char *val, const char **ptr);
|
|
void pstrcpy(char *buf, int buf_size, const char *str);
|
|
char *pstrcat(char *buf, int buf_size, const char *s);
|
|
|
|
void __dynarray_add(unsigned long **tab_ptr, int *nb_ptr, unsigned long elem);
|
|
|
|
#ifdef __GNUC__
|
|
#define dynarray_add(tab, nb_ptr, elem)\
|
|
do {\
|
|
typeof(tab) _tab = (tab);\
|
|
typeof(elem) _elem = (elem);\
|
|
(void)sizeof(**_tab == _elem); /* check that types are compatible */\
|
|
__dynarray_add((unsigned long **)_tab, nb_ptr, (unsigned long)_elem);\
|
|
} while(0)
|
|
#else
|
|
#define dynarray_add(tab, nb_ptr, elem)\
|
|
do {\
|
|
__dynarray_add((unsigned long **)(tab), nb_ptr, (unsigned long)(elem));\
|
|
} while(0)
|
|
#endif
|
|
|
|
time_t mktimegm(struct tm *tm);
|
|
struct tm *brktimegm(time_t secs, struct tm *tm);
|
|
const char *small_strptime(const char *p, const char *fmt,
|
|
struct tm *dt);
|
|
|
|
struct in_addr;
|
|
int resolve_host(struct in_addr *sin_addr, const char *hostname);
|
|
|
|
void url_split(char *proto, int proto_size,
|
|
char *authorization, int authorization_size,
|
|
char *hostname, int hostname_size,
|
|
int *port_ptr,
|
|
char *path, int path_size,
|
|
const char *url);
|
|
|
|
int match_ext(const char *filename, const char *extensions);
|
|
|
|
#endif /* HAVE_AV_CONFIG_H */
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* AVFORMAT_H */
|
|
|