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ffmpeg.wasm-core
Commit b9a281db authored by Fabrice Bellard's avatar Fabrice Bellard
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split mux/demux related structures - added file probing support - improve media file reading API 

Originally committed as revision 545 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent fe9cf0d4
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Showing with 664 additions and 179 deletions
libav/avformat.h
View file @ b9a281db
......@@ -24,10 +24,18 @@ int av_new_packet(AVPacket *pkt, int size);
void av_free_packet(AVPacket *pkt);
/*************************************************/
/* output formats */
/* input/output formats */
struct AVFormatContext;
struct AVFormatInputContext;
/* this structure contains the data a format has to probe a file */
typedef struct AVProbeData {
char *filename;
unsigned char *buf;
int buf_size;
} AVProbeData;
#define AVPROBE_SCORE_MAX 100
typedef struct AVFormatParameters {
int frame_rate;
......@@ -38,12 +46,21 @@ typedef struct AVFormatParameters {
enum PixelFormat pix_fmt;
} AVFormatParameters;
typedef struct AVFormat {
#define AVFMT_NOFILE 0x0001 /* no file should be opened */
#define AVFMT_NEEDNUMBER 0x0002 /* needs '%d' in filename */
#define AVFMT_NOHEADER 0x0004 /* signal that no header is present
(streams are added dynamically) */
#define AVFMT_SHOW_IDS 0x0008 /* show format stream IDs numbers */
#define AVFMT_RGB24 0x0010 /* force RGB24 output for ppm (hack
- need better api) */
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 */
......@@ -52,14 +69,28 @@ typedef struct AVFormat {
int stream_index,
unsigned char *buf, int size, int force_pts);
int (*write_trailer)(struct AVFormatContext *);
/* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
int flags;
/* private fields */
struct AVOutputFormat *next;
} AVOutputFormat;
/* optional input support */
/* read the format header and initialize the AVFormatInputContext
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 */
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 */
/* read one packet and put it in 'pkt'. pts and flags are also
set. 'av_new_stream' can be called only if the flag
AVFMT_NOHEADER is used. */
int (*read_packet)(struct AVFormatContext *, AVPacket *pkt);
/* close the stream. The AVFormatContext and AVStreams are not
freed by this function */
......@@ -67,24 +98,37 @@ typedef struct AVFormat {
/* seek at or before a given pts (given in microsecond). The pts
origin is defined by the stream */
int (*read_seek)(struct AVFormatContext *, INT64 pts);
/* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_NOHEADER */
int flags;
#define AVFMT_NOFILE 0x0001 /* no file should be opened */
#define AVFMT_NEEDNUMBER 0x0002 /* needs '%d' in filename */
struct AVFormat *next;
} AVFormat;
/* 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;
/* private fields */
struct AVInputFormat *next;
} AVInputFormat;
typedef struct AVStream {
int id; /* internal stream id */
int index; /* stream index in AVFormatContext */
int id; /* format specific stream id */
AVCodecContext codec; /* codec context */
int r_frame_rate; /* real frame rate of the stream */
void *priv_data;
/* internal data used in av_find_stream_info() */
int codec_info_state;
int codec_info_nb_repeat_frames;
int codec_info_nb_real_frames;
} AVStream;
#define MAX_STREAMS 20
/* format I/O context */
typedef struct AVFormatContext {
struct AVFormat *format;
/* 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;
......@@ -107,86 +151,76 @@ typedef struct AVPacketList {
struct AVPacketList *next;
} AVPacketList;
extern AVFormat *first_format;
extern AVInputFormat *first_iformat;
extern AVOutputFormat *first_oformat;
/* rv10enc.c */
extern AVFormat rm_format;
/* XXX: use automatic init with either ELF sections or C file parser */
/* modules */
/* mpegmux.c */
/* mpeg.c */
#define AVF_FLAG_VCD 0x00000001 /* VCD compatible MPEG-PS */
extern AVFormat mpeg_mux_format;
int mpegps_init(void);
/* mpegts.c */
extern AVInputFormat mpegts_demux;
int mpegts_init(void);
/* asfenc.c */
extern AVFormat asf_format;
/* rm.c */
int rm_init(void);
/* crc.c */
int crc_init(void);
/* img.c */
int img_init(void);
/* asf.c */
int asf_init(void);
/* avienc.c */
extern AVFormat avi_format;
int avienc_init(void);
/* mov.c */
extern AVFormat mov_format;
extern AVFormat mp4_format;
/* avidec.c */
int avidec_init(void);
/* jpegenc.c */
extern AVFormat mpjpeg_format;
extern AVFormat jpeg_format;
extern AVFormat single_jpeg_format;
/* swf.c */
int swf_init(void);
/* mov.c */
int mov_init(void);
/* swfenc.c */
extern AVFormat swf_format;
/* jpeg.c */
int jpeg_init(void);
/* gif.c */
extern AVFormat gif_format;
int gif_init(void);
/* au.c */
extern AVFormat au_format;
int au_init(void);
/* wav.c */
extern AVFormat wav_format;
/* crc.c */
extern AVFormat crc_format;
/* img.c */
extern AVFormat pgm_format;
extern AVFormat ppm_format;
extern AVFormat pgmyuv_format;
extern AVFormat imgyuv_format;
extern AVFormat pgmpipe_format;
extern AVFormat pgmyuvpipe_format;
extern AVFormat ppmpipe_format;
int wav_init(void);
/* raw.c */
extern AVFormat mp2_format;
extern AVFormat ac3_format;
extern AVFormat h263_format;
extern AVFormat mpeg1video_format;
extern AVFormat mjpeg_format;
extern AVFormat pcm_s16le_format;
extern AVFormat pcm_s16be_format;
extern AVFormat pcm_u16le_format;
extern AVFormat pcm_u16be_format;
extern AVFormat pcm_s8_format;
extern AVFormat pcm_u8_format;
extern AVFormat pcm_mulaw_format;
extern AVFormat pcm_alaw_format;
extern AVFormat rawvideo_format;
int raw_init(void);
/* ffm.c */
extern AVFormat ffm_format;
/* formats.c */
int ffm_init(void);
/* utils.c */
#define MKTAG(a,b,c,d) (a | (b << 8) | (c << 16) | (d << 24))
#define MKBETAG(a,b,c,d) (d | (c << 8) | (b << 16) | (a << 24))
void register_avformat(AVFormat *format);
AVFormat *guess_format(const char *short_name, const char *filename, const char *mime_type);
void av_register_input_format(AVInputFormat *format);
void av_register_output_format(AVOutputFormat *format);
AVOutputFormat *guess_format(const char *short_name,
const char *filename, const char *mime_type);
int strstart(const char *str, const char *val, const char **ptr);
void nstrcpy(char *buf, int buf_size, const char *str);
/* This does what strncpy ought to do. */
void strlcpy(char *dst, const char *src, int dst_size);
void pstrcpy(char *buf, int buf_size, const char *str);
int match_ext(const char *filename, const char *extensions);
void av_hex_dump(UINT8 *buf, int size);
void register_all(void);
......@@ -203,14 +237,29 @@ int fifo_size(FifoBuffer *f, UINT8 *rptr);
int fifo_read(FifoBuffer *f, UINT8 *buf, int buf_size, UINT8 **rptr_ptr);
void fifo_write(FifoBuffer *f, UINT8 *buf, int size, UINT8 **wptr_ptr);
AVFormatContext *av_open_input_file(const char *filename,
const char *format_name,
int buf_size,
AVFormatParameters *ap);
/* media file input */
AVInputFormat *av_find_input_format(const char *short_name);
int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
AVInputFormat *fmt,
int buf_size,
AVFormatParameters *ap);
#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 */
int av_find_stream_info(AVFormatContext *ic);
int av_read_packet(AVFormatContext *s, AVPacket *pkt);
void av_close_input_file(AVFormatContext *s);
AVStream *av_new_stream(AVFormatContext *s, int id);
/* media file output */
int av_write_header(AVFormatContext *s);
int av_write_packet(AVFormatContext *s, AVPacket *pkt, int force_pts);
int av_write_trailer(AVFormatContext *s);
void dump_format(AVFormatContext *ic,
int index,
......@@ -230,10 +279,11 @@ int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
int get_frame_filename(char *buf, int buf_size,
const char *path, int number);
int filename_number_test(const char *filename);
/* grab/output specific */
extern AVFormat video_grab_device_format;
extern AVFormat audio_device_format;
/* grab specific */
int video_grab_init(void);
int audio_init(void);
extern const char *v4l_device;
extern const char *audio_device;
libav/utils.c
View file @ b9a281db
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