diff options
Diffstat (limited to 'libavformat/avformat.h')
-rw-r--r-- | libavformat/avformat.h | 139 |
1 files changed, 126 insertions, 13 deletions
diff --git a/libavformat/avformat.h b/libavformat/avformat.h index 5276af1c15..752645e2c5 100644 --- a/libavformat/avformat.h +++ b/libavformat/avformat.h @@ -1,20 +1,20 @@ /* * copyright (c) 2001 Fabrice Bellard * - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * 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. * - * Libav is distributed in the hope that it will be useful, + * 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 Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -87,7 +87,7 @@ struct AVFormatContext; * @defgroup metadata_api Public Metadata API * @{ * The metadata API allows libavformat to export metadata tags to a client - * application using a sequence of key/value pairs. Like all strings in Libav, + * application using a sequence of key/value pairs. Like all strings in FFmpeg, * metadata must be stored as UTF-8 encoded Unicode. Note that metadata * exported by demuxers isn't checked to be valid UTF-8 in most cases. * Important concepts to keep in mind: @@ -309,6 +309,9 @@ typedef struct AVFormatParameters { #define AVFMT_NOBINSEARCH 0x2000 /**< Format does not allow to fallback to binary search via read_timestamp */ #define AVFMT_NOGENSEARCH 0x4000 /**< Format does not allow to fallback to generic search */ #define AVFMT_NO_BYTE_SEEK 0x8000 /**< Format does not allow seeking by bytes */ +#define AVFMT_TS_NONSTRICT 0x8000000 /**< Format does not require strictly + increasing timestamps, but they must + still be monotonic */ typedef struct AVOutputFormat { const char *name; @@ -336,10 +339,9 @@ typedef struct AVOutputFormat { * AVFMT_NODIMENSIONS, AVFMT_NOSTREAMS */ int flags; - /** - * Currently only used to set pixel format if not YUV420P. - */ - int (*set_parameters)(struct AVFormatContext *, AVFormatParameters *); + + void *dummy; + int (*interleave_packet)(struct AVFormatContext *, AVPacket *out, AVPacket *in, int flush); @@ -365,6 +367,9 @@ typedef struct AVOutputFormat { */ int (*query_codec)(enum CodecID id, int std_compliance); + void (*get_output_timestamp)(struct AVFormatContext *s, int stream, + int64_t *dts, int64_t *wall); + /* private fields */ struct AVOutputFormat *next; } AVOutputFormat; @@ -501,7 +506,12 @@ enum AVStreamParseType { typedef struct AVIndexEntry { int64_t pos; - int64_t timestamp; + int64_t timestamp; /**< + * Timestamp in AVStream.time_base units, preferably the time from which on correctly decoded frames are available + * when seeking to this entry. That means preferable PTS on keyframe based formats. + * But demuxers can choose to store a different timestamp, if it is more convenient for the implementation or nothing better + * is known + */ #define AVINDEX_KEYFRAME 0x0001 int flags:2; int size:30; //Yeah, trying to keep the size of this small to reduce memory requirements (it is 24 vs. 32 bytes due to possible 8-byte alignment). @@ -584,10 +594,12 @@ typedef struct AVStream { #endif /** - * Decoding: pts of the first frame of the stream, in stream time base. + * Decoding: pts of the first frame of the stream in presentation order, in stream time base. * Only set this if you are absolutely 100% sure that the value you set * it to really is the pts of the first frame. * This may be undefined (AV_NOPTS_VALUE). + * @note The ASF header does NOT contain a correct start_time the ASF + * demuxer must NOT set this. */ int64_t start_time; @@ -682,6 +694,13 @@ typedef struct AVStream { int codec_info_nb_frames; /** + * Stream Identifier + * This is the MPEG-TS stream identifier +1 + * 0 means unknown + */ + int stream_identifier; + + /** * Stream informations used internally by av_find_stream_info() */ #define MAX_STD_TIMEBASES (60*12+5) @@ -689,10 +708,16 @@ typedef struct AVStream { int64_t last_dts; int64_t duration_gcd; int duration_count; - double duration_error[MAX_STD_TIMEBASES]; + double duration_error[2][2][MAX_STD_TIMEBASES]; int64_t codec_info_duration; int nb_decoded_frames; } *info; + + /** + * flag to indicate that probing is requested + * NOT PART OF PUBLIC API + */ + int request_probe; #if !FF_API_REORDER_PRIVATE const uint8_t *cur_ptr; int cur_len; @@ -753,6 +778,10 @@ typedef struct AVProgram { unsigned int *stream_index; unsigned int nb_stream_indexes; AVDictionary *metadata; + + int program_num; + int pmt_pid; + int pcr_pid; } AVProgram; #define AVFMTCTX_NOHEADER 0x0001 /**< signal that no header is present @@ -865,7 +894,7 @@ typedef struct AVFormatContext { /** * 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 Libav can compute it automatically. + * duration are known as FFmpeg can compute it automatically. */ int bit_rate; @@ -912,6 +941,10 @@ typedef struct AVFormatContext { #endif #define AVFMT_FLAG_CUSTOM_IO 0x0080 ///< The caller has supplied a custom AVIOContext, don't avio_close() it. #define AVFMT_FLAG_DISCARD_CORRUPT 0x0100 ///< Discard frames marked corrupted +#define AVFMT_FLAG_MP4A_LATM 0x8000 ///< Enable RTP MP4A-LATM payload +#define AVFMT_FLAG_SORT_DTS 0x10000 ///< try to interleave outputted packets by dts (using this flag can slow demuxing down) +#define AVFMT_FLAG_PRIV_OPT 0x20000 ///< Enable use of private options by delaying codec open (this could be made default once all code is converted) +#define AVFMT_FLAG_KEEP_SIDE_DATA 0x40000 ///< Dont merge side data but keep it seperate. #if FF_API_LOOP_INPUT /** @@ -1039,6 +1072,13 @@ typedef struct AVFormatContext { */ AVIOInterruptCB interrupt_callback; + /** + * Transport stream id. + * This will be moved into demuxer private options. Thus no API/ABI compatibility + */ + int ts_id; + + /***************************************************************** * All fields below this line are not part of the public API. They * may not be used outside of libavformat and can be changed and @@ -1244,6 +1284,15 @@ AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened); AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max); /** + * Guess the file format. + * + * @param is_opened Whether the file is already opened; determines whether + * demuxers with or without AVFMT_NOFILE are probed. + * @param score_ret The score of the best detection. + */ +AVInputFormat *av_probe_input_format3(AVProbeData *pd, int is_opened, int *score_ret); + +/** * Probe a bytestream to determine the input format. Each time a probe returns * with a score that is too low, the probe buffer size is increased and another * attempt is made. When the maximum probe size is reached, the input format @@ -1313,6 +1362,8 @@ attribute_deprecated int av_open_input_file(AVFormatContext **ic_ptr, const char */ int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options); +int av_demuxer_open(AVFormatContext *ic, AVFormatParameters *ap); + /** * Allocate an AVFormatContext. * avformat_free_context() can be used to free the context and everything @@ -1320,6 +1371,35 @@ int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputForma */ AVFormatContext *avformat_alloc_context(void); +#if FF_API_ALLOC_OUTPUT_CONTEXT +/** + * @deprecated deprecated in favor of avformat_alloc_output_context2() + */ +attribute_deprecated +AVFormatContext *avformat_alloc_output_context(const char *format, + AVOutputFormat *oformat, + const char *filename); +#endif + +/** + * Allocate an AVFormatContext for an output format. + * avformat_free_context() can be used to free the context and + * everything allocated by the framework within it. + * + * @param *ctx is set to the created format context, or to NULL in + * case of failure + * @param oformat format to use for allocating the context, if NULL + * format_name and filename are used instead + * @param format_name the name of output format to use for allocating the + * context, if NULL filename is used instead + * @param filename the name of the filename to use for allocating the + * context, may be NULL + * @return >= 0 in case of success, a negative AVERROR code in case of + * failure + */ +int avformat_alloc_output_context2(AVFormatContext **ctx, AVOutputFormat *oformat, + const char *format_name, const char *filename); + #if FF_API_FORMAT_PARAMETERS /** * Read packets of a media file to get stream information. This @@ -1364,6 +1444,18 @@ int av_find_stream_info(AVFormatContext *ic); int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options); /** + * Find the programs which belong to a given stream. + * + * @param ic media file handle + * @param last the last found program, the search will start after this + * program, or from the beginning if it is NULL + * @param s stream index + * @return the next program which belongs to s, NULL if no program is found or + * the last program is not among the programs of ic. + */ +AVProgram *av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s); + +/** * Find the "best" stream in the file. * The best stream is determined according to various heuristics as the most * likely to be what the user expects. @@ -1722,7 +1814,28 @@ int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, */ int av_write_trailer(AVFormatContext *s); +/** + * Get timing information for the data currently output. + * The exact meaning of "currently output" depends on the format. + * It is mostly relevant for devices that have an internal buffer and/or + * work in real time. + * @param s media file handle + * @param stream stream in the media file + * @param dts[out] DTS of the last packet output for the stream, in stream + * time_base units + * @param wall[out] absolute time when that packet whas output, + * in microsecond + * @return 0 if OK, AVERROR(ENOSYS) if the format does not support it + * Note: some formats or devices may not allow to measure dts and wall + * atomically. + */ +int av_get_output_timestamp(struct AVFormatContext *s, int stream, + int64_t *dts, int64_t *wall); + #if FF_API_DUMP_FORMAT +/** + * @deprecated Deprecated in favor of av_dump_format(). + */ attribute_deprecated void dump_format(AVFormatContext *ic, int index, const char *url, |