diff options
Diffstat (limited to 'libavformat/avformat.h')
| -rw-r--r-- | libavformat/avformat.h | 734 |
1 files changed, 706 insertions, 28 deletions
diff --git a/libavformat/avformat.h b/libavformat/avformat.h index f28186f7c7..aae8375dc6 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 */ @@ -50,7 +50,7 @@ * * Main lavf structure used for both muxing and demuxing is AVFormatContext, * which exports all information about the file being read or written. As with - * most Libav structures, its size is not part of public ABI, so it cannot be + * most Libavformat structures, its size is not part of public ABI, so it cannot be * allocated on stack or directly with av_malloc(). To create an * AVFormatContext, use avformat_alloc_context() (some functions, like * avformat_open_input() might do that for you). @@ -261,6 +261,8 @@ struct AVFormatContext; +struct AVDeviceInfoList; +struct AVDeviceCapabilitiesQuery; /** * @defgroup metadata_api Public Metadata API @@ -272,7 +274,7 @@ struct AVFormatContext; * * Metadata is exported or set as pairs of key/value strings in the 'metadata' * fields of the AVFormatContext, AVStream, AVChapter and AVProgram structs - * using the @ref lavu_dict "AVDictionary" API. Like all strings in Libav, + * using the @ref lavu_dict "AVDictionary" API. Like all strings in FFmpeg, * metadata is assumed to be UTF-8 encoded Unicode. Note that metadata * exported by demuxers isn't checked to be valid UTF-8 in most cases. * @@ -399,6 +401,9 @@ typedef struct AVProbeData { const char *mime_type; /**< mime_type, when known. */ } AVProbeData; +#define AVPROBE_SCORE_RETRY (AVPROBE_SCORE_MAX/4) +#define AVPROBE_SCORE_STREAM_RETRY (AVPROBE_SCORE_MAX/4-1) + #define AVPROBE_SCORE_EXTENSION 50 ///< score for file extension #define AVPROBE_SCORE_MIME 75 ///< score for file mime type #define AVPROBE_SCORE_MAX 100 ///< maximum score @@ -422,14 +427,24 @@ typedef struct AVProbeData { #define AVFMT_NOGENSEARCH 0x4000 /**< Format does not allow to fall back on generic search */ #define AVFMT_NO_BYTE_SEEK 0x8000 /**< Format does not allow seeking by bytes */ #define AVFMT_ALLOW_FLUSH 0x10000 /**< Format allows flushing. If not set, the muxer will not receive a NULL packet in the write_packet function. */ -#define AVFMT_TS_NONSTRICT 0x20000 /**< Format does not require strictly +#if LIBAVFORMAT_VERSION_MAJOR <= 54 +#define AVFMT_TS_NONSTRICT 0x8020000 //we try to be compatible to the ABIs of ffmpeg and major forks +#else +#define AVFMT_TS_NONSTRICT 0x20000 +#endif + /**< Format does not require strictly increasing timestamps, but they must still be monotonic */ #define AVFMT_TS_NEGATIVE 0x40000 /**< Format allows muxing negative timestamps. If not set the timestamp will be shifted in av_write_frame and av_interleaved_write_frame so they - start from 0. */ + start from 0. + The user or muxer can override this through + AVFormatContext.avoid_negative_ts + */ + +#define AVFMT_SEEK_TO_PTS 0x4000000 /**< Seeking is based on PTS */ /** * @addtogroup lavf_encoding @@ -499,8 +514,43 @@ typedef struct AVOutputFormat { * * @return 1 if the codec is supported, 0 if it is not. * A negative number if unknown. + * MKTAG('A', 'P', 'I', 'C') if the codec is only supported as AV_DISPOSITION_ATTACHED_PIC */ int (*query_codec)(enum AVCodecID id, int std_compliance); + + void (*get_output_timestamp)(struct AVFormatContext *s, int stream, + int64_t *dts, int64_t *wall); + /** + * Allows sending messages from application to device. + */ + int (*control_message)(struct AVFormatContext *s, int type, + void *data, size_t data_size); + + /** + * Write an uncoded AVFrame. + * + * See av_write_uncoded_frame() for details. + * + * The library will free *frame afterwards, but the muxer can prevent it + * by setting the pointer to NULL. + */ + int (*write_uncoded_frame)(struct AVFormatContext *, int stream_index, + AVFrame **frame, unsigned flags); + /** + * Returns device list with it properties. + * @see avdevice_list_devices() for more details. + */ + int (*get_device_list)(struct AVFormatContext *s, struct AVDeviceInfoList *device_list); + /** + * Initialize device capabilities submodule. + * @see avdevice_capabilities_create() for more details. + */ + int (*create_device_capabilities)(struct AVFormatContext *s, struct AVDeviceCapabilitiesQuery *caps); + /** + * Free device capabilities submodule. + * @see avdevice_capabilities_free() for more details. + */ + int (*free_device_capabilities)(struct AVFormatContext *s, struct AVDeviceCapabilitiesQuery *caps); } AVOutputFormat; /** * @} @@ -527,7 +577,7 @@ typedef struct AVInputFormat { /** * Can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_SHOW_IDS, * AVFMT_GENERIC_INDEX, AVFMT_TS_DISCONT, AVFMT_NOBINSEARCH, - * AVFMT_NOGENSEARCH, AVFMT_NO_BYTE_SEEK. + * AVFMT_NOGENSEARCH, AVFMT_NO_BYTE_SEEK, AVFMT_SEEK_TO_PTS. */ int flags; @@ -636,6 +686,24 @@ typedef struct AVInputFormat { * Active streams are all streams that have AVStream.discard < AVDISCARD_ALL. */ int (*read_seek2)(struct AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags); + + /** + * Returns device list with it properties. + * @see avdevice_list_devices() for more details. + */ + int (*get_device_list)(struct AVFormatContext *s, struct AVDeviceInfoList *device_list); + + /** + * Initialize device capabilities submodule. + * @see avdevice_capabilities_create() for more details. + */ + int (*create_device_capabilities)(struct AVFormatContext *s, struct AVDeviceCapabilitiesQuery *caps); + + /** + * Free device capabilities submodule. + * @see avdevice_capabilities_free() for more details. + */ + int (*free_device_capabilities)(struct AVFormatContext *s, struct AVDeviceCapabilitiesQuery *caps); } AVInputFormat; /** * @} @@ -647,11 +715,19 @@ enum AVStreamParseType { AVSTREAM_PARSE_HEADERS, /**< Only parse headers, do not repack. */ AVSTREAM_PARSE_TIMESTAMPS, /**< full parsing and interpolation of timestamps for frames not starting on a packet boundary */ AVSTREAM_PARSE_FULL_ONCE, /**< full parsing and repack of the first frame only, only implemented for H.264 currently */ + AVSTREAM_PARSE_FULL_RAW=MKTAG(0,'R','A','W'), /**< full parsing and repack with timestamp and position generation by parser for raw + this assumes that each packet in the file contains no demuxer level headers and + just codec level data, otherwise position generation would fail */ }; 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). @@ -683,6 +759,20 @@ typedef struct AVIndexEntry { #define AV_DISPOSITION_ATTACHED_PIC 0x0400 /** + * To specify text track kind (different from subtitles default). + */ +#define AV_DISPOSITION_CAPTIONS 0x10000 +#define AV_DISPOSITION_DESCRIPTIONS 0x20000 +#define AV_DISPOSITION_METADATA 0x40000 + +/** + * Options for behavior on timestamp wrap detection. + */ +#define AV_PTS_WRAP_IGNORE 0 ///< ignore the wrap +#define AV_PTS_WRAP_ADD_OFFSET 1 ///< add the format specific offset on wrap detection +#define AV_PTS_WRAP_SUB_OFFSET -1 ///< subtract the format specific offset on wrap detection + +/** * Stream structure. * New fields can be added to the end with minor version bumps. * Removal, reordering and changes to existing fields require a major @@ -734,10 +824,12 @@ typedef struct AVStream { AVRational time_base; /** - * 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; @@ -796,6 +888,8 @@ typedef struct AVStream { * - muxing: May be set by the caller before avformat_write_header(). * * Freed by libavformat in avformat_free_context(). + * + * @see av_format_inject_global_side_data() */ AVPacketSideData *side_data; /** @@ -822,11 +916,25 @@ typedef struct AVStream { /** * Stream information used internally by av_find_stream_info() */ -#define MAX_STD_TIMEBASES (60*12+5) +#define MAX_STD_TIMEBASES (60*12+6) struct { - int nb_decoded_frames; + int64_t last_dts; + int64_t duration_gcd; + int duration_count; + int64_t rfps_duration_sum; + double (*duration_error)[2][MAX_STD_TIMEBASES]; + int64_t codec_info_duration; + int64_t codec_info_duration_fields; + + /** + * 0 -> decoder has not been searched for yet. + * >0 -> decoder found + * <0 -> decoder with codec_id == -found_decoder has not been found + */ int found_decoder; + int64_t last_duration; + /** * Those are used for average framerate estimation. */ @@ -840,6 +948,13 @@ typedef struct AVStream { int pts_wrap_bits; /**< number of bits in pts (used for wrapping control) */ // Timestamp generation support: + /** + * Timestamp corresponding to the last dts sync point. + * + * Initialized when AVCodecParserContext.dts_sync_point >= 0 and + * a DTS is received from the underlying container. Otherwise set to + * AV_NOPTS_VALUE by default. + */ int64_t first_dts; int64_t cur_dts; int64_t last_IP_pts; @@ -872,8 +987,129 @@ typedef struct AVStream { support seeking natively. */ int nb_index_entries; unsigned int index_entries_allocated_size; + + /** + * Real base framerate of the stream. + * This is the lowest framerate with which all timestamps can be + * represented accurately (it is the least common multiple of all + * framerates in the stream). Note, this value is just a guess! + * For example, if the time base is 1/90000 and all frames have either + * approximately 3600 or 1800 timer ticks, then r_frame_rate will be 50/1. + * + * Code outside avformat should access this field using: + * av_stream_get/set_r_frame_rate(stream) + */ + AVRational r_frame_rate; + + /** + * Stream Identifier + * This is the MPEG-TS stream identifier +1 + * 0 means unknown + */ + int stream_identifier; + + int64_t interleaver_chunk_size; + int64_t interleaver_chunk_duration; + + /** + * stream probing state + * -1 -> probing finished + * 0 -> no probing requested + * rest -> perform probing with request_probe being the minimum score to accept. + * NOT PART OF PUBLIC API + */ + int request_probe; + /** + * Indicates that everything up to the next keyframe + * should be discarded. + */ + int skip_to_keyframe; + + /** + * Number of samples to skip at the start of the frame decoded from the next packet. + */ + int skip_samples; + + /** + * If not 0, the first audio sample that should be discarded from the stream. + * This is broken by design (needs global sample count), but can't be + * avoided for broken by design formats such as mp3 with ad-hoc gapless + * audio support. + */ + int64_t first_discard_sample; + + /** + * The sample after last sample that is intended to be discarded after + * first_discard_sample. Works on frame boundaries only. Used to prevent + * early EOF if the gapless info is broken (considered concatenated mp3s). + */ + int64_t last_discard_sample; + + /** + * Number of internally decoded frames, used internally in libavformat, do not access + * its lifetime differs from info which is why it is not in that structure. + */ + int nb_decoded_frames; + + /** + * Timestamp offset added to timestamps before muxing + * NOT PART OF PUBLIC API + */ + int64_t mux_ts_offset; + + /** + * Internal data to check for wrapping of the time stamp + */ + int64_t pts_wrap_reference; + + /** + * Options for behavior, when a wrap is detected. + * + * Defined by AV_PTS_WRAP_ values. + * + * If correction is enabled, there are two possibilities: + * If the first time stamp is near the wrap point, the wrap offset + * will be subtracted, which will create negative time stamps. + * Otherwise the offset will be added. + */ + int pts_wrap_behavior; + + /** + * Internal data to prevent doing update_initial_durations() twice + */ + int update_initial_durations_done; + + /** + * Internal data to generate dts from pts + */ + int64_t pts_reorder_error[MAX_REORDER_DELAY+1]; + uint8_t pts_reorder_error_count[MAX_REORDER_DELAY+1]; + + /** + * Internal data to analyze DTS and detect faulty mpeg streams + */ + int64_t last_dts_for_order_check; + uint8_t dts_ordered; + uint8_t dts_misordered; + + /** + * Internal data to inject global side data + */ + int inject_global_side_data; + } AVStream; +AVRational av_stream_get_r_frame_rate(const AVStream *s); +void av_stream_set_r_frame_rate(AVStream *s, AVRational r); +struct AVCodecParserContext *av_stream_get_parser(const AVStream *s); + +/** + * Returns the pts of the last muxed packet + its duration + * + * the retuned value is undefined when used with a demuxer. + */ +int64_t av_stream_get_end_pts(const AVStream *st); + #define AV_PROGRAM_RUNNING 1 /** @@ -889,6 +1125,23 @@ typedef struct AVProgram { unsigned int *stream_index; unsigned int nb_stream_indexes; AVDictionary *metadata; + + int program_num; + int pmt_pid; + int pcr_pid; + + /***************************************************************** + * 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 + * removed at will. + * New public fields should be added right above. + ***************************************************************** + */ + int64_t start_time; + int64_t end_time; + + int64_t pts_wrap_reference; ///< reference dts for wrap detection + int pts_wrap_behavior; ///< behavior on wrap detection } AVProgram; #define AVFMTCTX_NOHEADER 0x0001 /**< signal that no header is present @@ -901,6 +1154,24 @@ typedef struct AVChapter { AVDictionary *metadata; } AVChapter; + +/** + * Callback used by devices to communicate with application. + */ +typedef int (*av_format_control_message)(struct AVFormatContext *s, int type, + void *data, size_t data_size); + + +/** + * The duration of a video can be estimated through various ways, and this enum can be used + * to know how the duration was estimated. + */ +enum AVDurationEstimationMethod { + AVFMT_DURATION_FROM_PTS, ///< Duration accurately estimated from PTSes + AVFMT_DURATION_FROM_STREAM, ///< Duration estimated from a stream with a known duration + AVFMT_DURATION_FROM_BITRATE ///< Duration estimated from bitrate (less accurate) +}; + typedef struct AVFormatInternal AVFormatInternal; /** @@ -1011,7 +1282,7 @@ typedef struct AVFormatContext { /** * 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; @@ -1040,19 +1311,20 @@ typedef struct AVFormatContext { * This flag is mainly intended for testing. */ #define AVFMT_FLAG_BITEXACT 0x0400 +#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 ///< Don't merge side data but keep it separate. /** - * Maximum size of the data read from input for determining - * the input container format. - * Demuxing only, set by the caller before avformat_open_input(). + * @deprecated deprecated in favor of probesize2 */ unsigned int probesize; /** - * Maximum duration (in AV_TIME_BASE units) of the data read - * from input in avformat_find_stream_info(). - * Demuxing only, set by the caller before avformat_find_stream_info(). + * @deprecated deprecated in favor of max_analyze_duration2 */ + attribute_deprecated int max_analyze_duration; const uint8_t *key; @@ -1125,7 +1397,12 @@ typedef struct AVFormatContext { * Start time of the stream in real world time, in microseconds * since the Unix epoch (00:00 1st January 1970). That is, pts=0 in the * stream was captured at this real world time. - * Muxing only, set by the caller before avformat_write_header(). + * - muxing: Set by the caller before avformat_write_header(). If set to + * either 0 or AV_NOPTS_VALUE, then the current wall-time will + * be used. + * - demuxing: Set by libavformat. AV_NOPTS_VALUE if unknown. Note that + * the value may become known after some number of frames + * have been received. */ int64_t start_time_realtime; @@ -1198,6 +1475,115 @@ typedef struct AVFormatContext { */ int max_ts_probe; + + /** + * Transport stream id. + * This will be moved into demuxer private options. Thus no API/ABI compatibility + */ + int ts_id; + + /** + * Audio preload in microseconds. + * Note, not all formats support this and unpredictable things may happen if it is used when not supported. + * - encoding: Set by user via AVOptions (NO direct access) + * - decoding: unused + */ + int audio_preload; + + /** + * Max chunk time in microseconds. + * Note, not all formats support this and unpredictable things may happen if it is used when not supported. + * - encoding: Set by user via AVOptions (NO direct access) + * - decoding: unused + */ + int max_chunk_duration; + + /** + * Max chunk size in bytes + * Note, not all formats support this and unpredictable things may happen if it is used when not supported. + * - encoding: Set by user via AVOptions (NO direct access) + * - decoding: unused + */ + int max_chunk_size; + + /** + * forces the use of wallclock timestamps as pts/dts of packets + * This has undefined results in the presence of B frames. + * - encoding: unused + * - decoding: Set by user via AVOptions (NO direct access) + */ + int use_wallclock_as_timestamps; + + /** + * Avoid negative timestamps during muxing. + * 0 -> allow negative timestamps + * 1 -> avoid negative timestamps + * -1 -> choose automatically (default) + * Note, this only works when interleave_packet_per_dts is in use. + * - encoding: Set by user via AVOptions (NO direct access) + * - decoding: unused + */ + int avoid_negative_ts; + + /** + * avio flags, used to force AVIO_FLAG_DIRECT. + * - encoding: unused + * - decoding: Set by user via AVOptions (NO direct access) + */ + int avio_flags; + + /** + * The duration field can be estimated through various ways, and this field can be used + * to know how the duration was estimated. + * - encoding: unused + * - decoding: Read by user via AVOptions (NO direct access) + */ + enum AVDurationEstimationMethod duration_estimation_method; + + /** + * Skip initial bytes when opening stream + * - encoding: unused + * - decoding: Set by user via AVOptions (NO direct access) + */ + int64_t skip_initial_bytes; + + /** + * Correct single timestamp overflows + * - encoding: unused + * - decoding: Set by user via AVOptions (NO direct access) + */ + unsigned int correct_ts_overflow; + + /** + * Force seeking to any (also non key) frames. + * - encoding: unused + * - decoding: Set by user via AVOptions (NO direct access) + */ + int seek2any; + + /** + * Flush the I/O context after each packet. + * - encoding: Set by user via AVOptions (NO direct access) + * - decoding: unused + */ + int flush_packets; + + /** + * format probing score. + * The maximal score is AVPROBE_SCORE_MAX, its set when the demuxer probes + * the format. + * - encoding: unused + * - decoding: set by avformat, read by user via av_format_get_probe_score() (NO direct access) + */ + int probe_score; + + /** + * number of bytes to read maximally to identify format. + * - encoding: unused + * - decoding: set by user through AVOPtions (NO direct access) + */ + int format_probesize; + /***************************************************************** * 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 @@ -1239,6 +1625,7 @@ typedef struct AVFormatContext { /** * Offset to remap timestamps to be non-negative. * Expressed in timebase units. + * @see AVStream.mux_ts_offset */ int64_t offset; @@ -1252,8 +1639,119 @@ typedef struct AVFormatContext { * Must not be accessed in any way by callers. */ AVFormatInternal *internal; + + /** + * IO repositioned flag. + * This is set by avformat when the underlaying IO context read pointer + * is repositioned, for example when doing byte based seeking. + * Demuxers can use the flag to detect such changes. + */ + int io_repositioned; + + /** + * Forced video codec. + * This allows forcing a specific decoder, even when there are multiple with + * the same codec_id. + * Demuxing: Set by user via av_format_set_video_codec (NO direct access). + */ + AVCodec *video_codec; + + /** + * Forced audio codec. + * This allows forcing a specific decoder, even when there are multiple with + * the same codec_id. + * Demuxing: Set by user via av_format_set_audio_codec (NO direct access). + */ + AVCodec *audio_codec; + + /** + * Forced subtitle codec. + * This allows forcing a specific decoder, even when there are multiple with + * the same codec_id. + * Demuxing: Set by user via av_format_set_subtitle_codec (NO direct access). + */ + AVCodec *subtitle_codec; + + /** + * Number of bytes to be written as padding in a metadata header. + * Demuxing: Unused. + * Muxing: Set by user via av_format_set_metadata_header_padding. + */ + int metadata_header_padding; + + /** + * User data. + * This is a place for some private data of the user. + * Mostly usable with control_message_cb or any future callbacks in device's context. + */ + void *opaque; + + /** + * Callback used by devices to communicate with application. + */ + av_format_control_message control_message_cb; + + /** + * Output timestamp offset, in microseconds. + * Muxing: set by user via AVOptions (NO direct access) + */ + int64_t output_ts_offset; + + /** + * Maximum duration (in AV_TIME_BASE units) of the data read + * from input in avformat_find_stream_info(). + * Demuxing only, set by the caller before avformat_find_stream_info() + * via AVOptions (NO direct access). + * Can be set to 0 to let avformat choose using a heuristic. + */ + int64_t max_analyze_duration2; + + /** + * Maximum size of the data read from input for determining + * the input container format. + * Demuxing only, set by the caller before avformat_open_input() + * via AVOptions (NO direct access). + */ + int64_t probesize2; + + /** + * dump format separator. + * can be ", " or "\n " or anything else + * Code outside libavformat should access this field using AVOptions + * (NO direct access). + * - muxing: Set by user. + * - demuxing: Set by user. + */ + uint8_t *dump_separator; } AVFormatContext; +int av_format_get_probe_score(const AVFormatContext *s); +AVCodec * av_format_get_video_codec(const AVFormatContext *s); +void av_format_set_video_codec(AVFormatContext *s, AVCodec *c); +AVCodec * av_format_get_audio_codec(const AVFormatContext *s); +void av_format_set_audio_codec(AVFormatContext *s, AVCodec *c); +AVCodec * av_format_get_subtitle_codec(const AVFormatContext *s); +void av_format_set_subtitle_codec(AVFormatContext *s, AVCodec *c); +int av_format_get_metadata_header_padding(const AVFormatContext *s); +void av_format_set_metadata_header_padding(AVFormatContext *s, int c); +void * av_format_get_opaque(const AVFormatContext *s); +void av_format_set_opaque(AVFormatContext *s, void *opaque); +av_format_control_message av_format_get_control_message_cb(const AVFormatContext *s); +void av_format_set_control_message_cb(AVFormatContext *s, av_format_control_message callback); + +/** + * This function will cause global side data to be injected in the next packet + * of each stream as well as after any subsequent seek. + */ +void av_format_inject_global_side_data(AVFormatContext *s); + +/** + * Returns the method used to set ctx->duration. + * + * @return AVFMT_DURATION_FROM_PTS, AVFMT_DURATION_FROM_STREAM, or AVFMT_DURATION_FROM_BITRATE. + */ +enum AVDurationEstimationMethod av_fmt_ctx_get_duration_estimation_method(const AVFormatContext* ctx); + typedef struct AVPacketList { AVPacket pkt; struct AVPacketList *next; @@ -1291,7 +1789,6 @@ const char *avformat_license(void); * * @see av_register_input_format() * @see av_register_output_format() - * @see av_register_protocol() */ void av_register_all(void); @@ -1357,6 +1854,9 @@ const AVClass *avformat_get_class(void); * * When muxing, should be called by the user before avformat_write_header(). * + * User is required to call avcodec_close() and avformat_free_context() to + * clean up the allocation by avformat_new_stream(). + * * @param s media file handle * @param c If non-NULL, the AVCodecContext corresponding to the new stream * will be initialized to use this codec. This is needed for e.g. codec-specific @@ -1385,6 +1885,25 @@ AVProgram *av_new_program(AVFormatContext *s, int id); /** + * 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); + +/** * @addtogroup lavf_decoding * @{ */ @@ -1418,6 +1937,15 @@ 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 @@ -1429,9 +1957,17 @@ AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score * @param logctx the log context * @param offset the offset within the bytestream to probe from * @param max_probe_size the maximum probe buffer size (zero for default) - * @return 0 in case of success, a negative value corresponding to an + * @return the score in case of success, a negative value corresponding to an + * the maximal score is AVPROBE_SCORE_MAX * AVERROR code otherwise */ +int av_probe_input_buffer2(AVIOContext *pb, AVInputFormat **fmt, + const char *filename, void *logctx, + unsigned int offset, unsigned int max_probe_size); + +/** + * Like av_probe_input_buffer2() but returns 0 on success + */ int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt, const char *filename, void *logctx, unsigned int offset, unsigned int max_probe_size); @@ -1457,6 +1993,9 @@ int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt, */ int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options); +attribute_deprecated +int av_demuxer_open(AVFormatContext *ic); + /** * Read packets of a media file to get stream information. This * is useful for file formats with no headers such as MPEG. This @@ -1481,6 +2020,18 @@ int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputForma 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. @@ -1567,6 +2118,7 @@ int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, * or if stream_index is -1, in AV_TIME_BASE units. * If flags contain AVSEEK_FLAG_ANY, then non-keyframes are treated as * keyframes (this may not be supported by all demuxers). + * If flags contain AVSEEK_FLAG_BACKWARD, it is ignored. * * @param s media file handle * @param stream_index index of the stream which is used as time base reference @@ -1698,6 +2250,44 @@ int av_write_frame(AVFormatContext *s, AVPacket *pkt); int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt); /** + * Write a uncoded frame to an output media file. + * + * The frame must be correctly interleaved according to the container + * specification; if not, then av_interleaved_write_frame() must be used. + * + * See av_interleaved_write_frame() for details. + */ +int av_write_uncoded_frame(AVFormatContext *s, int stream_index, + AVFrame *frame); + +/** + * Write a uncoded frame to an output media file. + * + * If the muxer supports it, this function allows to write an AVFrame + * structure directly, without encoding it into a packet. + * It is mostly useful for devices and similar special muxers that use raw + * video or PCM data and will not serialize it into a byte stream. + * + * To test whether it is possible to use it with a given muxer and stream, + * use av_write_uncoded_frame_query(). + * + * The caller gives up ownership of the frame and must not access it + * afterwards. + * + * @return >=0 for success, a negative code on error + */ +int av_interleaved_write_uncoded_frame(AVFormatContext *s, int stream_index, + AVFrame *frame); + +/** + * Test whether a muxer supports uncoded frame. + * + * @return >=0 if an uncoded frame can be written to that muxer and stream, + * <0 if not + */ +int av_write_uncoded_frame_query(AVFormatContext *s, int stream_index); + +/** * Write the stream trailer to an output media file and free the * file private data. * @@ -1732,6 +2322,25 @@ enum AVCodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name, enum AVMediaType type); /** + * 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[out] dts DTS of the last packet output for the stream, in stream + * time_base units + * @param[out] wall 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); + + +/** * @} */ @@ -1778,7 +2387,7 @@ void av_hex_dump_log(void *avcl, int level, const uint8_t *buf, int size); * @param dump_payload True if the payload must be displayed, too. * @param st AVStream that the packet belongs to */ -void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st); +void av_pkt_dump2(FILE *f, const AVPacket *pkt, int dump_payload, const AVStream *st); /** @@ -1792,8 +2401,8 @@ void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st); * @param dump_payload True if the payload must be displayed, too. * @param st AVStream that the packet belongs to */ -void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload, - AVStream *st); +void av_pkt_dump_log2(void *avcl, int level, const AVPacket *pkt, int dump_payload, + const AVStream *st); /** * Get the AVCodecID for the given codec tag tag. @@ -1815,6 +2424,18 @@ enum AVCodecID av_codec_get_id(const struct AVCodecTag * const *tags, unsigned i */ unsigned int av_codec_get_tag(const struct AVCodecTag * const *tags, enum AVCodecID id); +/** + * Get the codec tag for the given codec id. + * + * @param tags list of supported codec_id - codec_tag pairs, as stored + * in AVInputFormat.codec_tag and AVOutputFormat.codec_tag + * @param id codec id that should be searched for in the list + * @param tag A pointer to the found tag + * @return 0 if id was not found in tags, > 0 if it was found + */ +int av_codec_get_tag2(const struct AVCodecTag * const *tags, enum AVCodecID id, + unsigned int *tag); + int av_find_default_stream_index(AVFormatContext *s); /** @@ -1873,9 +2494,9 @@ void av_url_split(char *proto, int proto_size, * codec and time base. * * @param ic the context to analyze - * @param index the index to print, if you have multiple inputs or outputs + * @param index index of the stream to dump information about * @param url the URL to print, such as source or destination file - * @param is_output whether the context is input or ouput + * @param is_output Select whether the specified context is an input(0) or output(1) */ void av_dump_format(AVFormatContext *ic, int index, @@ -1967,10 +2588,67 @@ const struct AVCodecTag *avformat_get_riff_video_tags(void); */ const struct AVCodecTag *avformat_get_riff_audio_tags(void); /** + * @return the table mapping MOV FourCCs for video to libavcodec AVCodecID. + */ +const struct AVCodecTag *avformat_get_mov_video_tags(void); +/** + * @return the table mapping MOV FourCCs for audio to AVCodecID. + */ +const struct AVCodecTag *avformat_get_mov_audio_tags(void); + +/** * @} */ /** + * Guess the sample aspect ratio of a frame, based on both the stream and the + * frame aspect ratio. + * + * Since the frame aspect ratio is set by the codec but the stream aspect ratio + * is set by the demuxer, these two may not be equal. This function tries to + * return the value that you should use if you would like to display the frame. + * + * Basic logic is to use the stream aspect ratio if it is set to something sane + * otherwise use the frame aspect ratio. This way a container setting, which is + * usually easy to modify can override the coded value in the frames. + * + * @param format the format context which the stream is part of + * @param stream the stream which the frame is part of + * @param frame the frame with the aspect ratio to be determined + * @return the guessed (valid) sample_aspect_ratio, 0/1 if no idea + */ +AVRational av_guess_sample_aspect_ratio(AVFormatContext *format, AVStream *stream, AVFrame *frame); + +/** + * Guess the frame rate, based on both the container and codec information. + * + * @param ctx the format context which the stream is part of + * @param stream the stream which the frame is part of + * @param frame the frame for which the frame rate should be determined, may be NULL + * @return the guessed (valid) frame rate, 0/1 if no idea + */ +AVRational av_guess_frame_rate(AVFormatContext *ctx, AVStream *stream, AVFrame *frame); + +/** + * Check if the stream st contained in s is matched by the stream specifier + * spec. + * + * See the "stream specifiers" chapter in the documentation for the syntax + * of spec. + * + * @return >0 if st is matched by spec; + * 0 if st is not matched by spec; + * AVERROR code if spec is invalid + * + * @note A stream specifier can match several streams in the format. + */ +int avformat_match_stream_specifier(AVFormatContext *s, AVStream *st, + const char *spec); + +int avformat_queue_attached_pictures(AVFormatContext *s); + + +/** * @} */ |