/* * 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 #include /* FILE */ #include "avcodec.h" #include "avio.h" /* packet functions */ #ifndef MAXINT64 #define MAXINT64 INT64_C(0x7fffffffffffffff) #endif #ifndef MININT64 #define MININT64 INT64_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); 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 */ 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 */