isomedia_dev.h

一个用于智能手机的多媒体库适合S60 WinCE的跨平台开发库

	u32 avgBitrate;
	u32 slidingAverageBitrate;
} GF_HintMediaHeaderBox;

typedef struct
{
	GF_ISOM_FULL_BOX
} GF_MPEGMediaHeaderBox;

typedef struct
{
	GF_ISOM_FULL_BOX
} GF_ODMediaHeaderBox;

typedef struct
{
	GF_ISOM_FULL_BOX
} GF_OCRMediaHeaderBox;

typedef struct
{
	GF_ISOM_FULL_BOX
} GF_SceneMediaHeaderBox;

typedef struct
{
	GF_ISOM_FULL_BOX
	GF_List *boxList;
} GF_DataReferenceBox;

typedef struct
{
	GF_ISOM_BOX
	GF_DataReferenceBox *dref;
} GF_DataInformationBox;

#define GF_ISOM_DATAENTRY_FIELDS	\
	char *location;

typedef struct
{
	GF_ISOM_FULL_BOX
	GF_ISOM_DATAENTRY_FIELDS
} GF_DataEntryBox;

typedef struct
{
	GF_ISOM_FULL_BOX
	GF_ISOM_DATAENTRY_FIELDS
} GF_DataEntryURLBox;

typedef struct
{
	GF_ISOM_FULL_BOX
	GF_ISOM_DATAENTRY_FIELDS
	char *nameURN;
} GF_DataEntryURNBox;

typedef struct
{
	u32 sampleCount;
	u32 sampleDelta;
} GF_SttsEntry;

typedef struct
{
	GF_ISOM_FULL_BOX
	GF_List *entryList;
#ifndef GPAC_READ_ONLY
	/*cache for WRITE*/
	GF_SttsEntry *w_currentEntry;
	u32 w_currentSampleNum;
	u64 w_LastDTS;
#endif
	/*cache for READ*/
	u32 r_FirstSampleInEntry;
	u32 r_currentEntryIndex;
	u64 r_CurrentDTS;
} GF_TimeToSampleBox;

typedef struct
{
	u32 sampleCount;
	u32 decodingOffset;
} GF_DttsEntry;

typedef struct
{
	GF_ISOM_FULL_BOX
	GF_List *entryList;
#ifndef GPAC_READ_ONLY
	/*Cache for write*/
	GF_DttsEntry *w_currentEntry;
	u32 w_LastSampleNumber;
	/*force one sample per entry*/
	Bool unpack_mode;
#endif
	/*Cache for read*/
	u32 r_currentEntryIndex;
	u32 r_FirstSampleInEntry;
} GF_CompositionOffsetBox;


typedef struct
{
	u32 SampleNumber;
	u32 fragmentCount;
	u16 *fragmentSizes;
} GF_StsfEntry;

typedef struct
{
	GF_ISOM_FULL_BOX
	GF_List *entryList;
#ifndef GPAC_READ_ONLY
	/*Cache for write*/
	GF_StsfEntry *w_currentEntry;
	u32 w_currentEntryIndex;
#endif
	/*Cache for read*/
	u32 r_currentEntryIndex;
	GF_StsfEntry *r_currentEntry;
} GF_SampleFragmentBox;


#define GF_ISOM_SAMPLE_ENTRY_FIELDS		\
	GF_ISOM_UUID_BOX					\
	u16 dataReferenceIndex;				\
	char reserved[ 6 ];					\
	struct __tag_protect_box *protection_info;

/*base sample entry box (never used but for typecasting)*/
typedef struct
{
	GF_ISOM_SAMPLE_ENTRY_FIELDS
} GF_SampleEntryBox;

typedef struct
{
	GF_ISOM_SAMPLE_ENTRY_FIELDS
	/*box type as specified in the file (not this box's type!!)*/
	u32 EntryType;

	char *data;
	u32 data_size;
} GF_GenericSampleEntryBox;

typedef struct
{
	GF_ISOM_FULL_BOX
	GF_ESD *desc;
} GF_ESDBox;

/*for all MPEG4 media except audio and video*/
typedef struct
{
	GF_ISOM_SAMPLE_ENTRY_FIELDS
	GF_ESDBox *esd;
	/*used for hinting when extracting the OD stream...*/
	GF_SLConfig *slc;
} GF_MPEGSampleEntryBox;


#define GF_ISOM_VISUAL_SAMPLE_ENTRY		\
	GF_ISOM_SAMPLE_ENTRY_FIELDS			\
	u16 version;						\
	u16 revision;						\
	u32 vendor;							\
	u32 temporal_quality;				\
	u32 spacial_quality;				\
	u16 Width, Height;					\
	u32 horiz_res, vert_res;			\
	u32 entry_data_size;				\
	u16 frames_per_sample;				\
	char compressor_name[33];	\
	u16 bit_depth;						\
	s16 color_table_index;

typedef struct
{
	GF_ISOM_VISUAL_SAMPLE_ENTRY
} GF_VisualSampleEntryBox;

void gf_isom_video_sample_entry_init(GF_VisualSampleEntryBox *ent);
GF_Err gf_isom_video_sample_entry_read(GF_VisualSampleEntryBox *ptr, GF_BitStream *bs);
#ifndef GPAC_READ_ONLY
void gf_isom_video_sample_entry_write(GF_VisualSampleEntryBox *ent, GF_BitStream *bs);
void gf_isom_video_sample_entry_size(GF_VisualSampleEntryBox *ent);
#endif

typedef struct
{
	GF_ISOM_BOX
	u32 bufferSizeDB;
	u32 maxBitrate;
	u32 avgBitrate;
} GF_MPEG4BitRateBox;

typedef struct
{
	GF_ISOM_BOX
	GF_List *descriptors;
} GF_MPEG4ExtensionDescriptorsBox;

typedef struct
{
	GF_ISOM_BOX
	GF_AVCConfig *config;
} GF_AVCConfigurationBox;

typedef struct
{
	GF_ISOM_VISUAL_SAMPLE_ENTRY
	GF_ESDBox *esd;
	/*used for Publishing*/
	GF_SLConfig *slc;

	/*avc extensions - we merged with regular 'mp4v' box to handle isma E&A signaling of AVC*/
	GF_AVCConfigurationBox *avc_config;
	GF_MPEG4BitRateBox *bitrate;
	/*ext descriptors*/
	GF_MPEG4ExtensionDescriptorsBox *descr;
	/*internally emulated esd*/
	GF_ESD *emul_esd;
	/*iPod's hack*/
	GF_UnknownUUIDBox *ipod_ext;

} GF_MPEGVisualSampleEntryBox;


/*this is the default visual sdst (to handle unknown media)*/
typedef struct
{
	GF_ISOM_VISUAL_SAMPLE_ENTRY
	/*box type as specified in the file (not this box's type!!)*/
	u32 EntryType;
	/*opaque description data (ESDS in MP4, SMI in SVQ3, ...)*/
	char *data;
	u32 data_size;
} GF_GenericVisualSampleEntryBox;


#define GF_ISOM_AUDIO_SAMPLE_ENTRY	\
	GF_ISOM_SAMPLE_ENTRY_FIELDS		\
	u16 version;					\
	u16 revision;					\
	u32 vendor;						\
	u16 channel_count;				\
	u16 bitspersample;				\
	u16 compression_id;				\
	u16 packet_size;				\
	u16 samplerate_hi;				\
	u16 samplerate_lo;


typedef struct 
{
	GF_ISOM_AUDIO_SAMPLE_ENTRY
} GF_AudioSampleEntryBox;

void gf_isom_audio_sample_entry_init(GF_AudioSampleEntryBox *ptr);
GF_Err gf_isom_audio_sample_entry_read(GF_AudioSampleEntryBox *ptr, GF_BitStream *bs);
#ifndef GPAC_READ_ONLY
void gf_isom_audio_sample_entry_write(GF_AudioSampleEntryBox *ptr, GF_BitStream *bs);
void gf_isom_audio_sample_entry_size(GF_AudioSampleEntryBox *ptr);
#endif


typedef struct
{
	GF_ISOM_AUDIO_SAMPLE_ENTRY
	GF_ESDBox *esd;
	GF_SLConfig *slc;
} GF_MPEGAudioSampleEntryBox;

typedef struct
{
	GF_ISOM_BOX
	GF_3GPConfig cfg;
} GF_3GPPConfigBox;

typedef struct
{
	GF_ISOM_AUDIO_SAMPLE_ENTRY
	GF_3GPPConfigBox *info;
} GF_3GPPAudioSampleEntryBox;

typedef struct
{
	GF_ISOM_VISUAL_SAMPLE_ENTRY
	GF_3GPPConfigBox *info;
} GF_3GPPVisualSampleEntryBox;

/*this is the default visual sdst (to handle unknown media)*/
typedef struct
{
	GF_ISOM_AUDIO_SAMPLE_ENTRY
	/*box type as specified in the file (not this box's type!!)*/
	u32 EntryType;
	/*opaque description data (ESDS in MP4, ...)*/
	char *data;
	u32 data_size;
} GF_GenericAudioSampleEntryBox;


typedef struct
{
	GF_ISOM_FULL_BOX
	GF_List *boxList;
} GF_SampleDescriptionBox;


typedef struct
{
	GF_ISOM_FULL_BOX
	/*if this is the compact version, sample size is actually fieldSize*/
	u32 sampleSize;
	u32 sampleCount;
 	u32 alloc_size;
	u32 *sizes;
} GF_SampleSizeBox;

typedef struct
{
	GF_ISOM_FULL_BOX
	u32 entryCount;
	u32 alloc_size;
	u32 *offsets;
} GF_ChunkOffsetBox;

typedef struct 
{
	GF_ISOM_FULL_BOX
	u32 entryCount;
	u32 alloc_size;
	u64 *offsets;
} GF_ChunkLargeOffsetBox;

typedef struct
{
	u32 firstChunk;
	u32 nextChunk;
	u32 samplesPerChunk;
	u32 sampleDescriptionIndex;
	u8 isEdited;
} GF_StscEntry;


typedef struct
{
	GF_ISOM_FULL_BOX
	GF_List *entryList;
	GF_StscEntry *currentEntry;
	/*0-based cache for READ. In WRITE mode, we always have 1 sample per chunk so no need for a cache*/
	u32 currentIndex;
	/*first sample number in this chunk*/
	u32 firstSampleInCurrentChunk;
	u32 currentChunk;
	u32 ghostNumber;
} GF_SampleToChunkBox;

typedef struct
{
	GF_ISOM_FULL_BOX
	u32 entryCount;
	u32 *sampleNumbers;
	/*cache for READ mode (in write we realloc no matter what)*/
	u32 r_LastSyncSample;
	/*0-based index in the array*/
	u32 r_LastSampleIndex;
} GF_SyncSampleBox;

typedef struct
{
	u32 shadowedSampleNumber;
	s32 syncSampleNumber;
} GF_StshEntry;

typedef struct
{
	GF_ISOM_FULL_BOX
	GF_List *entries;
	/*Cache for read mode*/
	u32 r_LastEntryIndex;
	u32 r_LastFoundSample;
} GF_ShadowSyncBox;

typedef struct
{
	GF_ISOM_FULL_BOX
	u32 entryCount;
	u16 *priorities;
} GF_DegradationPriorityBox;

typedef struct
{
	GF_ISOM_FULL_BOX
	u32 SampleCount;
	u8 *padbits;
} GF_PaddingBitsBox;

typedef struct
{
	GF_ISOM_FULL_BOX
	u32 sampleCount;
	/*each dep type is packed on 1 byte*/
	u8 *sample_info;
} GF_SampleDependencyTypeBox;


typedef struct
{
	GF_ISOM_BOX
	GF_TimeToSampleBox *TimeToSample;
	GF_CompositionOffsetBox *CompositionOffset;
	GF_SyncSampleBox *SyncSample;
	GF_SampleDescriptionBox *SampleDescription;
	GF_SampleSizeBox *SampleSize;
	GF_SampleToChunkBox *SampleToChunk;
	/*untyped, to handle 32 bits and 64 bits chunkOffsets*/
	GF_Box *ChunkOffset;
	GF_ShadowSyncBox *ShadowSync;
	GF_DegradationPriorityBox *DegradationPriority;
	GF_PaddingBitsBox *PaddingBits;
	GF_SampleDependencyTypeBox *SampleDep;
	GF_SampleFragmentBox *Fragments;

	u32 MaxSamplePerChunk;
	u16 groupID;
	u16 trackPriority;
	u32 currentEntryIndex;
} GF_SampleTableBox;

typedef struct __tag_media_info_box
{
	GF_ISOM_BOX
	GF_DataInformationBox *dataInformation;
	GF_SampleTableBox *sampleTable;
	GF_Box *InfoHeader;
	struct __tag_data_map *dataHandler;
	u32 dataEntryIndex;
} GF_MediaInformationBox;


typedef struct
{
	GF_ISOM_BOX
	char *data;
	u32 dataSize;
} GF_FreeSpaceBox;

typedef struct
{
	GF_ISOM_FULL_BOX
	char packedLanguageCode[4];
	char *notice;
} GF_CopyrightBox;


typedef struct
{
	char *name;
	u64 start_time;
} GF_ChapterEntry;

typedef struct
{
	GF_ISOM_FULL_BOX
	GF_List *list;
} GF_ChapterListBox;

typedef struct
{
	GF_ISOM_BOX
	u32 trackIDCount;
	u32 *trackIDs;
} GF_TrackReferenceTypeBox;

typedef struct
{
	GF_ISOM_BOX
	u32 majorBrand;
	u32 minorVersion;
	u32 altCount;
	u32 *altBrand;
} GF_FileTypeBox;

typedef struct
{
	GF_ISOM_FULL_BOX
	u32 *rates;
	u32 *times;
	u32 count;
} GF_ProgressiveDownloadBox;


/*
	3GPP streaming text boxes
*/