ref: 4b4241830d669436bff595a1deaa5148f9562d79
dir: /common/mp4v2/mp4track.h/
/*
* The contents of this file are subject to the Mozilla Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is MPEG4IP.
*
* The Initial Developer of the Original Code is Cisco Systems Inc.
* Portions created by Cisco Systems Inc. are
* Copyright (C) Cisco Systems Inc. 2001. All Rights Reserved.
*
* Contributor(s):
* Dave Mackie [email protected]
*/
#ifndef __MP4_TRACK_INCLUDED__
#define __MP4_TRACK_INCLUDED__
typedef u_int32_t MP4ChunkId;
// forward declarations
class MP4File;
class MP4Atom;
class MP4Property;
class MP4IntegerProperty;
class MP4Integer16Property;
class MP4Integer32Property;
class MP4Integer64Property;
class MP4StringProperty;
class MP4Track {
public:
MP4Track(MP4File* pFile, MP4Atom* pTrakAtom);
virtual ~MP4Track();
MP4TrackId GetId() {
return m_trackId;
}
const char* GetType();
void SetType(const char* type);
MP4File* GetFile() {
return m_pFile;
}
MP4Atom* GetTrakAtom() {
return m_pTrakAtom;
}
void ReadSample(
// input parameters
MP4SampleId sampleId,
// output parameters
u_int8_t** ppBytes,
u_int32_t* pNumBytes,
MP4Timestamp* pStartTime = NULL,
MP4Duration* pDuration = NULL,
MP4Duration* pRenderingOffset = NULL,
bool* pIsSyncSample = NULL);
void WriteSample(
const u_int8_t* pBytes,
u_int32_t numBytes,
MP4Duration duration = 0,
MP4Duration renderingOffset = 0,
bool isSyncSample = true);
virtual void FinishWrite();
u_int64_t GetDuration(); // in track timeScale units
u_int32_t GetTimeScale();
u_int32_t GetNumberOfSamples();
u_int32_t GetSampleSize(MP4SampleId sampleId);
u_int32_t GetMaxSampleSize();
u_int64_t GetTotalOfSampleSizes();
u_int32_t GetAvgBitrate(); // in bps
u_int32_t GetMaxBitrate(); // in bps
MP4Duration GetFixedSampleDuration();
bool SetFixedSampleDuration(MP4Duration duration);
void GetSampleTimes(MP4SampleId sampleId,
MP4Timestamp* pStartTime, MP4Duration* pDuration);
bool IsSyncSample(MP4SampleId sampleId);
MP4SampleId GetSampleIdFromTime(
MP4Timestamp when,
bool wantSyncSample = false);
MP4Duration GetSampleRenderingOffset(MP4SampleId sampleId);
void SetSampleRenderingOffset(MP4SampleId sampleId,
MP4Duration renderingOffset);
MP4EditId AddEdit(
MP4EditId editId = MP4_INVALID_EDIT_ID);
void DeleteEdit(
MP4EditId editId);
MP4Timestamp GetEditStart(
MP4EditId editId);
MP4Timestamp GetEditTotalDuration(
MP4EditId editId);
MP4SampleId GetSampleIdFromEditTime(
MP4Timestamp editWhen,
MP4Timestamp* pStartTime = NULL,
MP4Duration* pDuration = NULL);
static const char* NormalizeTrackType(const char* type);
// special operation for use during hint track packet assembly
void ReadSampleFragment(
MP4SampleId sampleId,
u_int32_t sampleOffset,
u_int16_t sampleLength,
u_int8_t* pDest);
// special operations for use during optimization
u_int32_t GetNumberOfChunks();
MP4Timestamp GetChunkTime(MP4ChunkId chunkId);
void ReadChunk(MP4ChunkId chunkId,
u_int8_t** ppChunk, u_int32_t* pChunkSize);
void RewriteChunk(MP4ChunkId chunkId,
u_int8_t* pChunk, u_int32_t chunkSize);
protected:
bool InitEditListProperties();
FILE* GetSampleFile(MP4SampleId sampleId);
u_int64_t GetSampleFileOffset(MP4SampleId sampleId);
u_int32_t GetSampleStscIndex(MP4SampleId sampleId);
u_int32_t GetChunkStscIndex(MP4ChunkId chunkId);
u_int32_t GetChunkSize(MP4ChunkId chunkId);
u_int32_t GetSampleCttsIndex(MP4SampleId sampleId,
MP4SampleId* pFirstSampleId = NULL);
MP4SampleId GetNextSyncSample(MP4SampleId sampleId);
void UpdateSampleSizes(MP4SampleId sampleId,
u_int32_t numBytes);
bool IsChunkFull(MP4SampleId sampleId);
void UpdateSampleToChunk(MP4SampleId sampleId,
MP4ChunkId chunkId, u_int32_t samplesPerChunk);
void UpdateChunkOffsets(u_int64_t chunkOffset);
void UpdateSampleTimes(MP4Duration duration);
void UpdateRenderingOffsets(MP4SampleId sampleId,
MP4Duration renderingOffset);
void UpdateSyncSamples(MP4SampleId sampleId,
bool isSyncSample);
MP4Atom* AddAtom(char* parentName, char* childName);
void UpdateDurations(MP4Duration duration);
MP4Duration ToMovieDuration(MP4Duration trackDuration);
void UpdateModificationTimes();
void WriteChunkBuffer();
protected:
MP4File* m_pFile;
MP4Atom* m_pTrakAtom; // moov.trak[]
MP4TrackId m_trackId; // moov.trak[].tkhd.trackId
MP4StringProperty* m_pTypeProperty; // moov.trak[].mdia.hdlr.handlerType
u_int32_t m_lastStsdIndex;
FILE* m_lastSampleFile;
// for efficient construction of hint track packets
MP4SampleId m_cachedReadSampleId;
u_int8_t* m_pCachedReadSample;
u_int32_t m_cachedReadSampleSize;
// for writing
MP4SampleId m_writeSampleId;
MP4Duration m_fixedSampleDuration;
u_int8_t* m_pChunkBuffer;
u_int32_t m_chunkBufferSize;
u_int32_t m_chunkSamples;
MP4Duration m_chunkDuration;
// controls for chunking
u_int32_t m_samplesPerChunk;
MP4Duration m_durationPerChunk;
MP4Integer32Property* m_pTimeScaleProperty;
MP4IntegerProperty* m_pTrackDurationProperty; // 32 or 64 bits
MP4IntegerProperty* m_pMediaDurationProperty; // 32 or 64 bits
MP4IntegerProperty* m_pTrackModificationProperty; // 32 or 64 bits
MP4IntegerProperty* m_pMediaModificationProperty; // 32 or 64 bits
MP4Integer32Property* m_pStszFixedSampleSizeProperty;
MP4Integer32Property* m_pStszSampleCountProperty;
MP4Integer32Property* m_pStszSampleSizeProperty;
MP4Integer32Property* m_pStscCountProperty;
MP4Integer32Property* m_pStscFirstChunkProperty;
MP4Integer32Property* m_pStscSamplesPerChunkProperty;
MP4Integer32Property* m_pStscSampleDescrIndexProperty;
MP4Integer32Property* m_pStscFirstSampleProperty;
MP4Integer32Property* m_pChunkCountProperty;
MP4IntegerProperty* m_pChunkOffsetProperty; // 32 or 64 bits
MP4Integer32Property* m_pSttsCountProperty;
MP4Integer32Property* m_pSttsSampleCountProperty;
MP4Integer32Property* m_pSttsSampleDeltaProperty;
MP4Integer32Property* m_pCttsCountProperty;
MP4Integer32Property* m_pCttsSampleCountProperty;
MP4Integer32Property* m_pCttsSampleOffsetProperty;
MP4Integer32Property* m_pStssCountProperty;
MP4Integer32Property* m_pStssSampleProperty;
MP4Integer32Property* m_pElstCountProperty;
MP4IntegerProperty* m_pElstMediaTimeProperty; // 32 or 64 bits
MP4IntegerProperty* m_pElstDurationProperty; // 32 or 64 bits
MP4Integer16Property* m_pElstRateProperty;
MP4Integer16Property* m_pElstReservedProperty;
};
MP4ARRAY_DECL(MP4Track, MP4Track*);
#endif /* __MP4_TRACK_INCLUDED__ */