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// Win32 VfW/ACM interface:
extern char* win32_codec_name; // must be set before calling DrvOpen() !!!
int init_acm_audio_codec(sh_audio_t *sh_audio);
int acm_decode_audio(sh_audio_t *sh_audio, void* a_buffer,int minlen,int maxlen);
int init_vfw_video_codec(sh_video_t *sh_video,int ex);
int vfw_decode_video(sh_video_t* sh_video,void* start,int in_size,int drop_frame,int ex);
int vfw_set_postproc(sh_video_t* sh_video,int quality);
BITMAPINFOHEADER* vfw_open_encoder(char *dll_name, BITMAPINFOHEADER *input_bih,unsigned int out_fourcc);
int vfw_encode_frame(BITMAPINFOHEADER* biOutput,void* OutBuf,
BITMAPINFOHEADER* biInput,void* Image,
long* keyframe, int quality);
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