139 lines
3.5 KiB
C
139 lines
3.5 KiB
C
#ifndef __AVIDEMUX_H
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#define __AVIDEMUX_H
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typedef unsigned long DWORD;
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//typedef unsigned int uint32_t;
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//typedef unsigned int uint32_t;
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typedef unsigned short int WORD;
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typedef unsigned char BYTE;
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//typedef unsigned char uint8_t;
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struct avi_msg
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{
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uint32_t audio_sample_rate;
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uint32_t video_sample_rate;
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};
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struct _avisuperindex_entry_cache {
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DWORD dwOffsetl;
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DWORD dwOffseth;
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//超级索引表的数量
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DWORD dwSize;
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//编号起始地址
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DWORD offset; // frames
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};
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#ifndef AVI_STREAM_HEADER
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#define AVI_STREAM_HEADER
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typedef struct _avistreamheader {
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DWORD fcc;
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DWORD cb;
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DWORD fccType;
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DWORD fccHandler;
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DWORD dwFlags;
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WORD wPriority;
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WORD wLanguage;
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DWORD dwInitialFrames;
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DWORD dwScale;
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DWORD dwRate;
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DWORD dwStart;
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DWORD dwLength;
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DWORD dwSuggestedBufferSize;
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DWORD dwQuality;
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DWORD dwSampleSize;
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struct {
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short int left;
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short int top;
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short int right;
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short int bottom;
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} rcFrame;
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} AVISTREAMHEADER;
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#endif
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struct _aviindex_chunk {
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DWORD fcc;
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DWORD cb;
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WORD wLongsPerEntry;
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BYTE bIndexSubType;
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BYTE bIndexType;
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DWORD nEntriesInUse;
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DWORD dwChunkId;
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DWORD dwBaseOffsetl;
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DWORD dwBaseOffseth;
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DWORD dwReserved;
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};
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#ifndef AVI_SUPER_INDEX
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#define AVI_SUPER_INDEX
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struct _avisuperindex_entry {
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DWORD dwOffsetl;
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DWORD dwOffseth;
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DWORD dwSize;
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DWORD dwDuration; // frames
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};
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struct _avistdindex_entry {
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DWORD dwOffset;
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DWORD dwSize;
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};
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#endif
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struct avistrinfo {
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struct aviinfo *avi;
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uint32_t type;
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DWORD dwScale; // 來自strh的dwScale，但乘以1000以折算成毫秒
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DWORD dwRate; // 來自strh的dwRate
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DWORD dwTotalFrames; // 來自strh的dwLength
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DWORD dwIndexNum; // 來自indx的dwEntriesInUse,超级索引数量
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DWORD dwIndexBase; // 指向indx的aIndex[]在文件中的位置
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DWORD dwDuration; // 要求所有超級索引都指向相同長度的標準索引，這樣可以加速索引計算
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DWORD dwEntryNum; // 緩存的std_index中的nEntriesInUse,某个超级索引指向的标准索引数量
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DWORD dwEntryBase; // 緩存的std_index中的dwBaseOffsetl
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uint32_t cur; // 當前播放點。視頻幀號、或音頻包號
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uint32_t super_idx; // 當前緩存的標準索引，對應超級索引的哪一項
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DWORD cached_indx_base; // 當前緩存的超級索引扇區地址
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DWORD cached_ixnn_base; // 當前緩存的標準索引扇區地址
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struct _aviindex_chunk chunk;
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struct _avisuperindex_entry_cache *superindex_cache;
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struct _avistdindex_entry *stindex_cache;
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};
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struct aviinfo {
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void *fp; // 文件句柄
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uint32_t start_time; // 第一幀播放的起始時間
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uint32_t strmsk; // 有效流的掩碼
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uint8_t speed;
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struct avistrinfo str[2]; // 兩個流
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};
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struct avifp
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{
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void *fp;
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void *thread_handle;
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struct aviinfo *aviinfo_point;
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int running;
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};
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void *avidemux_parse(void *fp,void *aviinfo_point);
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uint32_t avidemux_read_begin(struct avistrinfo *str, uint32_t *base, uint32_t *size);
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void avi_read_thread(void *d);
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uint32_t avidemux_read (struct avistrinfo *str, uint8_t *buf, uint32_t len);
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void *avidemux_stream (struct aviinfo *avi, uint32_t idx);
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uint32_t avidemux_set_cur (struct avistrinfo *str,uint32_t cur);
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uint32_t get_avidemux_parse_stream(char *path,struct avi_msg *msg);
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void free_aviinfo_point(struct aviinfo *info);
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uint32_t read_avi_offset(struct avistrinfo *str,uint32_t *base,uint32_t *size);
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uint32_t read_avi_data(struct avistrinfo *str,char *buf,uint32_t size);
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uint32_t get_avi_cur(struct avistrinfo *info);
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#endif
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