Implement mp4 box read/write.
The box may be optimized if necessary during writing. Change-Id: I7a46e72a0bcbeacb23085a87e1f0df3a826e4da7
This commit is contained in:
Kongqun Yang
parent
0f3bc4b6b4
commit
57474b31d6
File diff suppressed because it is too large
Load Diff
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@ -9,10 +9,14 @@
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#include <vector>
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#include "media/mp4/aac.h"
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#include "media/mp4/box_reader.h"
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#include "media/mp4/box.h"
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#include "media/mp4/es_descriptor.h"
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#include "media/mp4/fourccs.h"
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namespace media {
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class BufferReader;
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namespace mp4 {
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enum TrackType {
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@ -22,33 +26,42 @@ enum TrackType {
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kHint
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};
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class BoxBuffer;
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#define DECLARE_BOX_METHODS(T) \
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T(); \
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virtual ~T(); \
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virtual bool Parse(BoxReader* reader) OVERRIDE; \
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virtual bool ReadWrite(BoxBuffer* buffer) OVERRIDE; \
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virtual FourCC BoxType() const OVERRIDE; \
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virtual uint32 ComputeSize() OVERRIDE;
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struct FileType : Box {
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DECLARE_BOX_METHODS(FileType);
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FourCC major_brand;
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uint32 minor_version;
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std::vector<FourCC> compatible_brands;
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};
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struct ProtectionSystemSpecificHeader : Box {
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struct SegmentType : FileType {
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DECLARE_BOX_METHODS(SegmentType);
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};
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struct ProtectionSystemSpecificHeader : FullBox {
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DECLARE_BOX_METHODS(ProtectionSystemSpecificHeader);
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std::vector<uint8> system_id;
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std::vector<uint8> data;
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std::vector<uint8> raw_box;
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};
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struct SampleAuxiliaryInformationOffset : Box {
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struct SampleAuxiliaryInformationOffset : FullBox {
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DECLARE_BOX_METHODS(SampleAuxiliaryInformationOffset);
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std::vector<uint64> offsets;
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};
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struct SampleAuxiliaryInformationSize : Box {
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struct SampleAuxiliaryInformationSize : FullBox {
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DECLARE_BOX_METHODS(SampleAuxiliaryInformationSize);
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uint8 default_sample_info_size;
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@ -62,14 +75,14 @@ struct OriginalFormat : Box {
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FourCC format;
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};
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struct SchemeType : Box {
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struct SchemeType : FullBox {
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DECLARE_BOX_METHODS(SchemeType);
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FourCC type;
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uint32 version;
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};
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struct TrackEncryption : Box {
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struct TrackEncryption : FullBox {
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DECLARE_BOX_METHODS(TrackEncryption);
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// Note: this definition is specific to the CENC protection type.
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@ -92,7 +105,7 @@ struct ProtectionSchemeInfo : Box {
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SchemeInfo info;
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};
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struct MovieHeader : Box {
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struct MovieHeader : FullBox {
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DECLARE_BOX_METHODS(MovieHeader);
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uint64 creation_time;
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@ -104,7 +117,13 @@ struct MovieHeader : Box {
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uint32 next_track_id;
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};
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struct TrackHeader : Box {
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struct TrackHeader : FullBox {
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enum TrackHeaderFlags {
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kTrackEnabled = 0x000001,
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kTrackInMovie = 0x000002,
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kTrackInPreview = 0x000004,
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};
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DECLARE_BOX_METHODS(TrackHeader);
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uint64 creation_time;
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@ -125,7 +144,7 @@ struct EditListEntry {
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int16 media_rate_fraction;
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};
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struct EditList : Box {
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struct EditList : FullBox {
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DECLARE_BOX_METHODS(EditList);
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std::vector<EditListEntry> edits;
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@ -137,7 +156,7 @@ struct Edit : Box {
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EditList list;
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};
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struct HandlerReference : Box {
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struct HandlerReference : FullBox {
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DECLARE_BOX_METHODS(HandlerReference);
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TrackType type;
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@ -188,11 +207,11 @@ struct VideoSampleEntry : Box {
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AVCDecoderConfigurationRecord avcc;
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};
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struct ElementaryStreamDescriptor : Box {
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struct ElementaryStreamDescriptor : FullBox {
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DECLARE_BOX_METHODS(ElementaryStreamDescriptor);
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uint8 object_type;
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AAC aac;
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ESDescriptor es_descriptor;
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};
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struct AudioSampleEntry : Box {
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@ -208,7 +227,7 @@ struct AudioSampleEntry : Box {
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ElementaryStreamDescriptor esds;
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};
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struct SampleDescription : Box {
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struct SampleDescription : FullBox {
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DECLARE_BOX_METHODS(SampleDescription);
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TrackType type;
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@ -222,7 +241,7 @@ struct DecodingTime {
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};
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// stts.
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struct DecodingTimeToSample : Box {
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struct DecodingTimeToSample : FullBox {
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DECLARE_BOX_METHODS(DecodingTimeToSample);
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std::vector<DecodingTime> decoding_time;
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@ -232,13 +251,13 @@ struct CompositionOffset {
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uint32 sample_count;
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// If version == 0, sample_offset is uint32;
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// If version == 1, sample_offset is int32.
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// Let us always use signed version, which should work unless the offset
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// Always use signed version, which should work unless the offset
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// exceeds 31 bits, which shouldn't happen.
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int32 sample_offset;
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};
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// ctts. Optional.
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struct CompositionTimeToSample : Box {
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struct CompositionTimeToSample : FullBox {
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DECLARE_BOX_METHODS(CompositionTimeToSample);
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std::vector<CompositionOffset> composition_offset;
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@ -251,14 +270,14 @@ struct ChunkInfo {
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};
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// stsc.
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struct SampleToChunk : Box {
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struct SampleToChunk : FullBox {
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DECLARE_BOX_METHODS(SampleToChunk);
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std::vector<ChunkInfo> chunk_info;
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};
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// stsz.
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struct SampleSize : Box {
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struct SampleSize : FullBox {
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DECLARE_BOX_METHODS(SampleSize);
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uint32 sample_size;
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@ -267,27 +286,27 @@ struct SampleSize : Box {
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};
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// stz2.
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struct CompactSampleSize : SampleSize {
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struct CompactSampleSize : FullBox {
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DECLARE_BOX_METHODS(CompactSampleSize);
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};
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// stco.
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struct ChunkOffset : Box {
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DECLARE_BOX_METHODS(ChunkOffset);
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// Chunk byte offsets into mdat relative to the beginning of the file.
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// Use 64 bits instead of 32 bits so it is large enough to hold
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// ChunkLargeOffset data.
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std::vector<uint64> offsets;
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uint8 field_size;
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std::vector<uint32> sizes;
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};
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// co64.
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struct ChunkLargeOffset : ChunkOffset {
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struct ChunkLargeOffset : FullBox {
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DECLARE_BOX_METHODS(ChunkLargeOffset);
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std::vector<uint64> offsets;
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};
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// stco.
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struct ChunkOffset : ChunkLargeOffset {
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DECLARE_BOX_METHODS(ChunkOffset);
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};
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// stss. Optional.
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struct SyncSample : Box {
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struct SyncSample : FullBox {
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DECLARE_BOX_METHODS(SyncSample);
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std::vector<uint32> sample_number;
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@ -302,12 +321,13 @@ struct SampleTable : Box {
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SampleToChunk sample_to_chunk;
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// Either SampleSize or CompactSampleSize must present. Store in SampleSize.
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SampleSize sample_size;
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// Either ChunkOffset or ChunkLargeOffset must present. Store in ChunkOffset.
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ChunkOffset chunk_offset;
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// Either ChunkOffset or ChunkLargeOffset must present. Store in
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// ChunkLargeOffset.
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ChunkLargeOffset chunk_large_offset;
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SyncSample sync_sample;
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};
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struct MediaHeader : Box {
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struct MediaHeader : FullBox {
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DECLARE_BOX_METHODS(MediaHeader);
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uint64 creation_time;
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@ -318,10 +338,48 @@ struct MediaHeader : Box {
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char language[4];
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};
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struct VideoMediaHeader : FullBox {
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DECLARE_BOX_METHODS(VideoMediaHeader);
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uint16 graphicsmode;
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uint16 opcolor_red;
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uint16 opcolor_green;
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uint16 opcolor_blue;
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};
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struct SoundMediaHeader : FullBox {
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DECLARE_BOX_METHODS(SoundMediaHeader);
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uint16 balance;
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};
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struct DataEntryUrl : FullBox {
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DECLARE_BOX_METHODS(DataEntryUrl);
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std::vector<uint8> location;
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};
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struct DataReference : FullBox {
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DECLARE_BOX_METHODS(DataReference);
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// data entry can be either url or urn box. Fix to url box for now.
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std::vector<DataEntryUrl> data_entry;
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};
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struct DataInformation : Box {
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DECLARE_BOX_METHODS(DataInformation);
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DataReference dref;
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};
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struct MediaInformation : Box {
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DECLARE_BOX_METHODS(MediaInformation);
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DataInformation dinf;
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SampleTable sample_table;
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// Exactly one specific meida header shall be present, vmhd, smhd, hmhd, nmhd.
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VideoMediaHeader vmhd;
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SoundMediaHeader smhd;
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};
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struct Media : Box {
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@ -340,13 +398,13 @@ struct Track : Box {
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Edit edit;
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};
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struct MovieExtendsHeader : Box {
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struct MovieExtendsHeader : FullBox {
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DECLARE_BOX_METHODS(MovieExtendsHeader);
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uint64 fragment_duration;
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};
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struct TrackExtends : Box {
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struct TrackExtends : FullBox {
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DECLARE_BOX_METHODS(TrackExtends);
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uint32 track_id;
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@ -366,41 +424,64 @@ struct MovieExtends : Box {
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struct Movie : Box {
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DECLARE_BOX_METHODS(Movie);
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bool fragmented;
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MovieHeader header;
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MovieExtends extends;
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std::vector<Track> tracks;
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std::vector<ProtectionSystemSpecificHeader> pssh;
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};
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struct TrackFragmentDecodeTime : Box {
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struct TrackFragmentDecodeTime : FullBox {
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DECLARE_BOX_METHODS(TrackFragmentDecodeTime);
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uint64 decode_time;
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};
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struct MovieFragmentHeader : Box {
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struct MovieFragmentHeader : FullBox {
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DECLARE_BOX_METHODS(MovieFragmentHeader);
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uint32 sequence_number;
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};
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struct TrackFragmentHeader : Box {
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struct TrackFragmentHeader : FullBox {
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enum TrackFragmentFlagsMasks {
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kDataOffsetPresentMask = 0x000001,
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kSampleDescriptionIndexPresentMask = 0x000002,
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kDefaultSampleDurationPresentMask = 0x000008,
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kDefaultSampleSizePresentMask = 0x000010,
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kDefaultSampleFlagsPresentMask = 0x000020,
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kDurationIsEmptyMask = 0x010000,
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kDefaultBaseIsMoofMask = 0x020000,
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};
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enum SampleFlagsMasks {
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kReservedMask = 0xFC000000,
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kSampleDependsOnMask = 0x03000000,
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kSampleIsDependedOnMask = 0x00C00000,
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kSampleHasRedundancyMask = 0x00300000,
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kSamplePaddingValueMask = 0x000E0000,
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kNonKeySampleMask = 0x00010000,
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kSampleDegradationPriorityMask = 0x0000FFFF,
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};
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DECLARE_BOX_METHODS(TrackFragmentHeader);
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uint32 track_id;
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uint32 sample_description_index;
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uint32 default_sample_duration;
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uint32 default_sample_size;
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uint32 default_sample_flags;
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// As 'flags' might be all zero, we cannot use zeroness alone to identify
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// when default_sample_flags wasn't specified, unlike the other values.
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bool has_default_sample_flags;
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};
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struct TrackFragmentRun : Box {
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struct TrackFragmentRun : FullBox {
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enum TrackFragmentFlagsMasks {
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kDataOffsetPresentMask = 0x000001,
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kFirstSampleFlagsPresentMask = 0x000004,
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kSampleDurationPresentMask = 0x000100,
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kSampleSizePresentMask = 0x000200,
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kSampleFlagsPresentMask = 0x000400,
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kSampleCompTimeOffsetsPresentMask = 0x000800,
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};
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DECLARE_BOX_METHODS(TrackFragmentRun);
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uint32 sample_count;
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@ -429,6 +510,50 @@ struct MovieFragment : Box {
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std::vector<ProtectionSystemSpecificHeader> pssh;
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};
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struct SegmentReference {
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enum SAPType {
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TypeUnknown = 0,
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Type1 = 1, // T(ept) = T(dec) = T(sap) = T(ptf)
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Type2 = 2, // T(ept) = T(dec) = T(sap) < T(ptf)
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Type3 = 3, // T(ept) < T(dec) = T(sap) <= T(ptf)
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Type4 = 4, // T(ept) <= T(ptf) < T(dec) = T(sap)
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Type5 = 5, // T(ept) = T(dec) < T(sap)
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Type6 = 6, // T(ept) < T(dec) < T(sap)
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};
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bool reference_type;
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uint32 referenced_size;
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uint32 subsegment_duration;
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bool starts_with_sap;
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SAPType sap_type;
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uint32 sap_delta_time;
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// We add this field to keep track of earliest_presentation_time in this
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// subsegment. It is not part of SegmentReference.
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uint64 earliest_presentation_time;
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};
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struct SegmentIndex : FullBox {
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DECLARE_BOX_METHODS(SegmentIndex);
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uint32 reference_id;
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uint32 timescale;
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uint64 earliest_presentation_time;
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uint64 first_offset;
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std::vector<SegmentReference> references;
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};
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// The actual data is parsed and written separately, so we do not inherit it
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// from Box.
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struct MediaData {
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MediaData();
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~MediaData();
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void Write(BufferWriter* buffer_writer);
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uint32 ComputeSize();
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FourCC BoxType() const;
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uint32 data_size;
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};
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#undef DECLARE_BOX
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} // namespace mp4
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@ -18,7 +18,9 @@ enum FourCC {
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FOURCC_CENC = 0x63656e63,
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FOURCC_CO64 = 0x636f3634,
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FOURCC_CTTS = 0x63747473,
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FOURCC_DASH = 0x64617368,
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FOURCC_DINF = 0x64696e66,
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FOURCC_DREF = 0x64726566,
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FOURCC_EAC3 = 0x65632d33,
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FOURCC_EDTS = 0x65647473,
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FOURCC_ELST = 0x656c7374,
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@ -30,6 +32,7 @@ enum FourCC {
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FOURCC_FTYP = 0x66747970,
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FOURCC_HDLR = 0x68646c72,
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FOURCC_HINT = 0x68696e74,
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FOURCC_ISO6 = 0x69736f36,
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FOURCC_IODS = 0x696f6473,
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FOURCC_MDAT = 0x6d646174,
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FOURCC_MDHD = 0x6d646864,
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@ -42,6 +45,7 @@ enum FourCC {
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FOURCC_MINF = 0x6d696e66,
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FOURCC_MOOF = 0x6d6f6f66,
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FOURCC_MOOV = 0x6d6f6f76,
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FOURCC_MP41 = 0x6d703431,
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FOURCC_MP4A = 0x6d703461,
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FOURCC_MP4V = 0x6d703476,
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FOURCC_MVEX = 0x6d766578,
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@ -79,6 +83,8 @@ enum FourCC {
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FOURCC_TREX = 0x74726578,
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FOURCC_TRUN = 0x7472756e,
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FOURCC_UDTA = 0x75647461,
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FOURCC_URL = 0x75726c20,
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FOURCC_URN = 0x75726e20,
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FOURCC_UUID = 0x75756964,
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FOURCC_VIDE = 0x76696465,
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FOURCC_VMHD = 0x766d6864,
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