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For #821, support parse dash video segment
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winlin
parent
8cc3ab2fa2
commit
baed1cc043
2 changed files with 725 additions and 1 deletions
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@ -111,8 +111,14 @@ enum SrsMp4BoxType
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SrsMp4BoxTypeUDTA = 0x75647461, // 'udta'
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SrsMp4BoxTypeMVEX = 0x6d766578, // 'mvex'
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SrsMp4BoxTypeTREX = 0x74726578, // 'trex'
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SrsMp4BoxTypePASP = 0x70617370, // 'pasp'
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SrsMp4BoxTypeSTYP = 0x73747970, // 'styp'
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SrsMp4BoxTypeMOOF = 0x6d6f6f66, // 'moof'
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SrsMp4BoxTypeMFHD = 0x6d666864, // 'mfhd'
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SrsMp4BoxTypeTRAF = 0x74726166, // 'traf'
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SrsMp4BoxTypeTFHD = 0x74666864, // 'tfhd'
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SrsMp4BoxTypeTFDT = 0x74666474, // 'tfdt'
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SrsMp4BoxTypeTRUN = 0x7472756e, // 'trun'
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};
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/**
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@ -290,6 +296,245 @@ public:
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virtual std::stringstream& dumps_detail(std::stringstream& ss, SrsMp4DumpContext dc);
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};
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/**
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* 8.16.2 Segment Type Box (styp)
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* ISO_IEC_14496-12-base-format-2012.pdf, page 105
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* If segments are stored in separate files (e.g. on a standard HTTP server) it is recommended that these
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* 'segment files' contain a segment-type box, which must be first if present, to enable identification of those files,
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* and declaration of the specifications with which they are compliant.
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*/
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class SrsMp4SegmentTypeBox : public SrsMp4FileTypeBox
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{
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public:
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SrsMp4SegmentTypeBox();
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virtual ~SrsMp4SegmentTypeBox();
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};
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/**
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* 8.8.4 Movie Fragment Box (moof)
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* ISO_IEC_14496-12-base-format-2012.pdf, page 66
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* The movie fragments extend the presentation in time. They provide the information that would previously have
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* been in the Movie Box. The actual samples are in Media Data Boxes, as usual, if they are in the same file.
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* The data reference index is in the sample description, so it is possible to build incremental presentations
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* where the media data is in files other than the file containing the Movie Box.
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*/
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class SrsMp4MovieFragmentBox : public SrsMp4Box
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{
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public:
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SrsMp4MovieFragmentBox();
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virtual ~SrsMp4MovieFragmentBox();
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};
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/**
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* 8.8.5 Movie Fragment Header Box (mfhd)
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* ISO_IEC_14496-12-base-format-2012.pdf, page 67
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* The movie fragment header contains a sequence number, as a safety check. The sequence number usually
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* starts at 1 and must increase for each movie fragment in the file, in the order in which they occur. This allows
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* readers to verify integrity of the sequence; it is an error to construct a file where the fragments are out of
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* sequence.
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*/
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class SrsMp4MovieFragmentHeaderBox : public SrsMp4FullBox
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{
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public:
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// the ordinal number of this fragment, in increasing order
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uint32_t sequence_number;
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public:
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SrsMp4MovieFragmentHeaderBox();
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virtual ~SrsMp4MovieFragmentHeaderBox();
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protected:
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virtual int nb_header();
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virtual int encode_header(SrsBuffer* buf);
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virtual int decode_header(SrsBuffer* buf);
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public:
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virtual std::stringstream& dumps_detail(std::stringstream& ss, SrsMp4DumpContext dc);
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};
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/**
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* 8.8.6 Track Fragment Box (traf)
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* ISO_IEC_14496-12-base-format-2012.pdf, page 67
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* Within the movie fragment there is a set of track fragments, zero or more per track. The track fragments in
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* turn contain zero or more track runs, each of which document a contiguous run of samples for that track.
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* Within these structures, many fields are optional and can be defaulted.
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*/
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class SrsMp4TrackFragmentBox : public SrsMp4Box
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{
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public:
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SrsMp4TrackFragmentBox();
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virtual ~SrsMp4TrackFragmentBox();
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};
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/**
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* The tf_flags of tfhd.
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* ISO_IEC_14496-12-base-format-2012.pdf, page 68
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*/
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enum SrsMp4TfhdFlags
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{
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/**
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* indicates the presence of the base-data-offset field. This provides
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* an explicit anchor for the data offsets in each track run (see below). If not provided, the base-data-
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* offset for the first track in the movie fragment is the position of the first byte of the enclosing Movie
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* Fragment Box, and for second and subsequent track fragments, the default is the end of the data
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* defined by the preceding fragment. Fragments 'inheriting' their offset in this way must all use
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* the same data-reference (i.e., the data for these tracks must be in the same file).
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*/
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SrsMp4TfhdFlagsBaseDataOffset = 0x000001,
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/**
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* indicates the presence of this field, which over-rides, in this
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* fragment, the default set up in the Track Extends Box.
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*/
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SrsMp4TfhdFlagsSampleDescriptionIndex = 0x000002,
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SrsMp4TfhdFlagsDefaultSampleDuration = 0x000008,
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SrsMp4TfhdFlagsDefautlSampleSize = 0x000010,
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SrsMp4TfhdFlagsDefaultSampleFlags = 0x000020,
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/**
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* this indicates that the duration provided in either default-sample-duration,
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* or by the default-duration in the Track Extends Box, is empty, i.e. that there are no samples for this
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* time interval. It is an error to make a presentation that has both edit lists in the Movie Box, and empty-
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* duration fragments.
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*/
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SrsMp4TfhdFlagsDurationIsEmpty = 0x010000,
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/**
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* if base-data-offset-present is zero, this indicates that the base-data-
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* offset for this track fragment is the position of the first byte of the enclosing Movie Fragment Box.
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* Support for the default-base-is-moof flag is required under the ‘iso5’ brand, and it shall not be used in
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* brands or compatible brands earlier than iso5.
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*/
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SrsMp4TfhdFlagsDefaultBaseIsMoof = 0x020000,
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};
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/**
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* 8.8.7 Track Fragment Header Box (tfhd)
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* ISO_IEC_14496-12-base-format-2012.pdf, page 68
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* Each movie fragment can add zero or more fragments to each track; and a track fragment can add zero or
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* more contiguous runs of samples. The track fragment header sets up information and defaults used for those
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* runs of samples.
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*/
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class SrsMp4TrackFragmentHeaderBox : public SrsMp4FullBox
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{
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public:
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uint32_t track_id;
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// all the following are optional fields
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public:
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// the base offset to use when calculating data offsets
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uint64_t base_data_offset;
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uint32_t sample_description_index;
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uint32_t default_sample_duration;
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uint32_t default_sample_size;
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uint32_t default_sample_flags;
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public:
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SrsMp4TrackFragmentHeaderBox();
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virtual ~SrsMp4TrackFragmentHeaderBox();
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protected:
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virtual int nb_header();
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virtual int encode_header(SrsBuffer* buf);
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virtual int decode_header(SrsBuffer* buf);
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public:
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virtual std::stringstream& dumps_detail(std::stringstream& ss, SrsMp4DumpContext dc);
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};
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/**
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* 8.8.12 Track fragment decode time (tfdt)
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* ISO_IEC_14496-12-base-format-2012.pdf, page 72
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* The Track Fragment Base Media Decode Time Box provides the absolute decode time, measured on
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* the media timeline, of the first sample in decode order in the track fragment. This can be useful, for example,
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* when performing random access in a file; it is not necessary to sum the sample durations of all preceding
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* samples in previous fragments to find this value (where the sample durations are the deltas in the Decoding
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* Time to Sample Box and the sample_durations in the preceding track runs).
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*/
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class SrsMp4TrackFragmentDecodeTimeBox : public SrsMp4FullBox
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{
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public:
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uint64_t base_media_decode_time;
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public:
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SrsMp4TrackFragmentDecodeTimeBox();
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virtual ~SrsMp4TrackFragmentDecodeTimeBox();
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protected:
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virtual int nb_header();
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virtual int encode_header(SrsBuffer* buf);
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virtual int decode_header(SrsBuffer* buf);
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public:
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virtual std::stringstream& dumps_detail(std::stringstream& ss, SrsMp4DumpContext dc);
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};
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/**
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* The tr_flags for trun
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* ISO_IEC_14496-12-base-format-2012.pdf, page 69
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*/
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enum SrsMp4TrunFlags
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{
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// data-offset-present.
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SrsMp4TrunFlagsDataOffset = 0x000001,
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// this over-rides the default flags for the first sample only. This
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// makes it possible to record a group of frames where the first is a key and the rest are difference
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// frames, without supplying explicit flags for every sample. If this flag and field are used, sample-flags
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// shall not be present.
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SrsMp4TrunFlagsFirstSample = 0x000004,
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// indicates that each sample has its own duration, otherwise the default is used.
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SrsMp4TrunFlagsSampleDuration = 0x000100,
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// each sample has its own size, otherwise the default is used.
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SrsMp4TrunFlagsSampleSize = 0x000200,
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// each sample has its own flags, otherwise the default is used.
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SrsMp4TrunFlagsSampleFlag = 0x000400,
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// each sample has a composition time offset (e.g. as used for I/P/B video in MPEG).
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SrsMp4TrunFlagsSampleCtsOffset = 0x000800,
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};
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/**
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* Entry for trun.
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* ISO_IEC_14496-12-base-format-2012.pdf, page 69
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*/
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struct SrsMp4TrunEntry
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{
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uint8_t version;
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uint32_t flags;
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uint32_t sample_duration;
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uint32_t sample_size;
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uint32_t sample_flags;
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// if version == 0, unsigned int(32); otherwise, signed int(32).
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int64_t sample_composition_time_offset;
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SrsMp4TrunEntry(uint8_t v, uint32_t f);
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virtual ~SrsMp4TrunEntry();
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virtual int nb_header();
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virtual int encode_header(SrsBuffer* buf);
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virtual int decode_header(SrsBuffer* buf);
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virtual std::stringstream& dumps_detail(std::stringstream& ss, SrsMp4DumpContext dc);
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};
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/**
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* 8.8.8 Track Fragment Run Box (trun)
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* ISO_IEC_14496-12-base-format-2012.pdf, page 69
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* Within the Track Fragment Box, there are zero or more Track Run Boxes. If the duration-is-empty flag is set in
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* the tf_flags, there are no track runs. A track run documents a contiguous set of samples for a track.
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*/
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class SrsMp4TrackFragmentRunBox : public SrsMp4FullBox
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{
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public:
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// the number of samples being added in this run; also the number of rows in the following
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// table (the rows can be empty)
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uint32_t sample_count;
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// the following are optional fields
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public:
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// added to the implicit or explicit data_offset established in the track fragment header.
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int32_t data_offset;
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// provides a set of flags for the first sample only of this run.
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uint32_t first_sample_flags;
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// all fields in the following array are optional
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public:
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std::vector<SrsMp4TrunEntry*> entries;
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public:
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SrsMp4TrackFragmentRunBox();
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virtual ~SrsMp4TrackFragmentRunBox();
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protected:
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virtual int nb_header();
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virtual int encode_header(SrsBuffer* buf);
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virtual int decode_header(SrsBuffer* buf);
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public:
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virtual std::stringstream& dumps_detail(std::stringstream& ss, SrsMp4DumpContext dc);
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};
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/**
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* 8.1.1 Media Data Box (mdat)
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* ISO_IEC_14496-12-base-format-2012.pdf, page 29
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