/*The function used to perform chroma conversion.*/ typedefvoid (*y4m_convert_func)(y4m_input *_y4m, unsignedchar *_dst, unsignedchar *_src);
struct y4m_input { int pic_w; int pic_h; int fps_n; int fps_d; int par_n; int par_d; char interlace; int src_c_dec_h; int src_c_dec_v; int dst_c_dec_h; int dst_c_dec_v; char chroma_type[16]; /*The size of each converted frame buffer.*/
size_t dst_buf_sz; /*The amount to read directly into the converted frame buffer.*/
size_t dst_buf_read_sz; /*The size of the auxilliary buffer.*/
size_t aux_buf_sz; /*The amount to read into the auxilliary buffer.*/
size_t aux_buf_read_sz;
y4m_convert_func convert; unsignedchar *dst_buf; unsignedchar *aux_buf; enum vpx_img_fmt vpx_fmt; int bps; unsignedint bit_depth;
};
/** *Opentheinputfile,treatingitasY4M.|y4m_ctx|isfilledinafter *readingit.The|skip_buffer|indicatesbytesthatwerepreviouslyread *from|file|,todoinput-typedetection;thisbufferwillbereadbefore *the|file|isread.Itisofsize|num_skip|,which*must*be8orless. * *Returns0onsuccess,-1onfailure.
*/ int y4m_input_open(y4m_input *y4m_ctx, FILE *file, char *skip_buffer, int num_skip, int only_420); void y4m_input_close(y4m_input *_y4m); int y4m_input_fetch_frame(y4m_input *_y4m, FILE *_fin, vpx_image_t *img);
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