static int rv10_decode_packet(AVCodecContext *avctx, UINT8 *buf, int buf_size) { MpegEncContext *s = avctx->priv_data; int i, mb_count, mb_pos, left; init_get_bits(&s->gb, buf, buf_size); mb_count = rv10_decode_picture_header(s); if (mb_count < 0) { fprintf(stderr, "HEADER ERROR\n"); return -1; } if (s->mb_x >= s->mb_width || s->mb_y >= s->mb_height) { fprintf(stderr, "POS ERROR %d %d\n", s->mb_x, s->mb_y); return -1; } mb_pos = s->mb_y * s->mb_width + s->mb_x; left = s->mb_width * s->mb_height - mb_pos; if (mb_count > left) { fprintf(stderr, "COUNT ERROR\n"); return -1; } if (s->mb_x == 0 && s->mb_y == 0) { if(MPV_frame_start(s, avctx) < 0) return -1; } #ifdef DEBUG printf("qscale=%d\n", s->qscale); #endif /* default quantization values */ s->y_dc_scale = 8; s->c_dc_scale = 8; s->rv10_first_dc_coded[0] = 0; s->rv10_first_dc_coded[1] = 0; s->rv10_first_dc_coded[2] = 0; if(s->mb_y==0) s->first_slice_line=1; s->block_wrap[0]= s->block_wrap[1]= s->block_wrap[2]= s->block_wrap[3]= s->mb_width*2 + 2; s->block_wrap[4]= s->block_wrap[5]= s->mb_width + 2; ff_init_block_index(s); /* decode each macroblock */ for(i=0;i<mb_count;i++) { ff_update_block_index(s); #ifdef DEBUG printf("**mb x=%d y=%d\n", s->mb_x, s->mb_y); #endif s->dsp.clear_blocks(s->block[0]); s->mv_dir = MV_DIR_FORWARD; s->mv_type = MV_TYPE_16X16; if (ff_h263_decode_mb(s, s->block) == SLICE_ERROR) { fprintf(stderr, "ERROR at MB %d %d\n", s->mb_x, s->mb_y); return -1; } MPV_decode_mb(s, s->block); if (++s->mb_x == s->mb_width) { s->mb_x = 0; s->mb_y++; ff_init_block_index(s); s->first_slice_line=0; } } return buf_size; }