int ff_split_xiph_headers(uint8_t *extradata, int extradata_size, int first_header_size, uint8_t *header_start[3], int header_len[3]) { int i, j; if (AV_RB16(extradata) == first_header_size) { for (i=0; i<3; i++) { header_len[i] = AV_RB16(extradata); extradata += 2; header_start[i] = extradata; extradata += header_len[i]; } } else if (extradata[0] == 2) { for (i=0,j=1; i<2; i++,j++) { header_len[i] = 0; for (; j<extradata_size && extradata[j]==0xff; j++) { header_len[i] += 0xff; } if (j >= extradata_size) return -1; header_len[i] += extradata[j]; } header_len[2] = extradata_size - header_len[0] - header_len[1] - j; extradata += j; header_start[0] = extradata; header_start[1] = header_start[0] + header_len[0]; header_start[2] = header_start[1] + header_len[1]; } else { return -1; } return 0; }