static void roqvideo_decode_frame(RoqContext *ri) { unsigned int chunk_id = 0, chunk_arg = 0; unsigned long chunk_size = 0; int i, j, k, nv1, nv2, vqflg = 0, vqflg_pos = -1; int vqid, bpos, xpos, ypos, xp, yp, x, y, mx, my; int frame_stats[2][4] = {{0},{0}}; roq_qcell *qcell; const unsigned char *buf = ri->buf; const unsigned char *buf_end = ri->buf + ri->size; while (buf < buf_end) { chunk_id = bytestream_get_le16(&buf); chunk_size = bytestream_get_le32(&buf); chunk_arg = bytestream_get_le16(&buf); if(chunk_id == RoQ_QUAD_VQ) break; if(chunk_id == RoQ_QUAD_CODEBOOK) { if((nv1 = chunk_arg >> 8) == 0) nv1 = 256; if((nv2 = chunk_arg & 0xff) == 0 && nv1 * 6 < chunk_size) nv2 = 256; for(i = 0; i < nv1; i++) { ri->cb2x2[i].y[0] = *buf++; ri->cb2x2[i].y[1] = *buf++; ri->cb2x2[i].y[2] = *buf++; ri->cb2x2[i].y[3] = *buf++; ri->cb2x2[i].u = *buf++; ri->cb2x2[i].v = *buf++; } for(i = 0; i < nv2; i++) for(j = 0; j < 4; j++) ri->cb4x4[i].idx[j] = *buf++; } } bpos = xpos = ypos = 0; if (chunk_size > buf_end - buf) { av_log(ri->avctx, AV_LOG_ERROR, "Chunk does not fit in input buffer\n"); chunk_size = buf_end - buf; } while(bpos < chunk_size) { for (yp = ypos; yp < ypos + 16; yp += 8) for (xp = xpos; xp < xpos + 16; xp += 8) { if (bpos >= chunk_size) { av_log(ri->avctx, AV_LOG_ERROR, "Input buffer too small\n"); return; } if (vqflg_pos < 0) { vqflg = buf[bpos++]; vqflg |= (buf[bpos++] << 8); vqflg_pos = 7; } vqid = (vqflg >> (vqflg_pos * 2)) & 0x3; frame_stats[0][vqid]++; vqflg_pos--; switch(vqid) { case RoQ_ID_MOT: break; case RoQ_ID_FCC: mx = 8 - (buf[bpos] >> 4) - ((signed char) (chunk_arg >> 8)); my = 8 - (buf[bpos++] & 0xf) - ((signed char) chunk_arg); ff_apply_motion_8x8(ri, xp, yp, mx, my); break; case RoQ_ID_SLD: qcell = ri->cb4x4 + buf[bpos++]; ff_apply_vector_4x4(ri, xp, yp, ri->cb2x2 + qcell->idx[0]); ff_apply_vector_4x4(ri, xp+4, yp, ri->cb2x2 + qcell->idx[1]); ff_apply_vector_4x4(ri, xp, yp+4, ri->cb2x2 + qcell->idx[2]); ff_apply_vector_4x4(ri, xp+4, yp+4, ri->cb2x2 + qcell->idx[3]); break; case RoQ_ID_CCC: for (k = 0; k < 4; k++) { x = xp; y = yp; if(k & 0x01) x += 4; if(k & 0x02) y += 4; if (bpos >= chunk_size) { av_log(ri->avctx, AV_LOG_ERROR, "Input buffer too small\n"); return; } if (vqflg_pos < 0) { vqflg = buf[bpos++]; vqflg |= (buf[bpos++] << 8); vqflg_pos = 7; } vqid = (vqflg >> (vqflg_pos * 2)) & 0x3; frame_stats[1][vqid]++; vqflg_pos--; switch(vqid) { case RoQ_ID_MOT: break; case RoQ_ID_FCC: mx = 8 - (buf[bpos] >> 4) - ((signed char) (chunk_arg >> 8)); my = 8 - (buf[bpos++] & 0xf) - ((signed char) chunk_arg); ff_apply_motion_4x4(ri, x, y, mx, my); break; case RoQ_ID_SLD: qcell = ri->cb4x4 + buf[bpos++]; ff_apply_vector_2x2(ri, x, y, ri->cb2x2 + qcell->idx[0]); ff_apply_vector_2x2(ri, x+2, y, ri->cb2x2 + qcell->idx[1]); ff_apply_vector_2x2(ri, x, y+2, ri->cb2x2 + qcell->idx[2]); ff_apply_vector_2x2(ri, x+2, y+2, ri->cb2x2 + qcell->idx[3]); break; case RoQ_ID_CCC: ff_apply_vector_2x2(ri, x, y, ri->cb2x2 + buf[bpos]); ff_apply_vector_2x2(ri, x+2, y, ri->cb2x2 + buf[bpos+1]); ff_apply_vector_2x2(ri, x, y+2, ri->cb2x2 + buf[bpos+2]); ff_apply_vector_2x2(ri, x+2, y+2, ri->cb2x2 + buf[bpos+3]); bpos += 4; break; } } break; default: av_log(ri->avctx, AV_LOG_ERROR, "Unknown vq code: %d\n", vqid); } } xpos += 16; if (xpos >= ri->width) { xpos -= ri->width; ypos += 16; } if(ypos >= ri->height) break; } }
static void roqvideo_decode_frame(RoqContext *ri) { unsigned int chunk_id = 0, chunk_arg = 0; unsigned long chunk_size = 0; int i, j, k, nv1, nv2, vqflg = 0, vqflg_pos = -1; int vqid, bpos, xpos, ypos, xp, yp, x, y, mx, my; int frame_stats[2][4] = {{0},{0}}; roq_qcell *qcell; const unsigned char *buf = ri->buf; const unsigned char *buf_end = ri->buf + ri->size; while (buf < buf_end) { chunk_id = bytestream_get_le16(&buf); chunk_size = bytestream_get_le32(&buf); chunk_arg = bytestream_get_le16(&buf); if(chunk_id == RoQ_QUAD_VQ) break; if(chunk_id == RoQ_QUAD_CODEBOOK) { if((nv1 = chunk_arg >> 8) == 0) nv1 = 256; if((nv2 = chunk_arg & 0xff) == 0 && nv1 * 6 < chunk_size) nv2 = 256; for(i = 0; i < nv1; i++) { ri->cb2x2[i].y[0] = *buf++; ri->cb2x2[i].y[1] = *buf++; ri->cb2x2[i].y[2] = *buf++; ri->cb2x2[i].y[3] = *buf++; ri->cb2x2[i].u = *buf++; ri->cb2x2[i].v = *buf++; } for(i = 0; i < nv2; i++) for(j = 0; j < 4; j++) ri->cb4x4[i].idx[j] = *buf++; } } bpos = xpos = ypos = 0; if (chunk_size > buf_end - buf) { av_log(ri->avctx, AV_LOG_ERROR, "Chunk does not fit in input buffer\n"); chunk_size = buf_end - buf; } while(bpos < chunk_size) { for (yp = ypos; yp < ypos + 16; yp += 8) for (xp = xpos; xp < xpos + 16; xp += 8) { if (bpos >= chunk_size) { av_log(ri->avctx, AV_LOG_ERROR, "Input buffer too small\n"); return; } if (vqflg_pos < 0) { vqflg = buf[bpos++]; vqflg |= (buf[bpos++] << 8); vqflg_pos = 7; } vqid = (vqflg >> (vqflg_pos * 2)) & 0x3; frame_stats[0][vqid]++; vqflg_pos--; switch(vqid) { case RoQ_ID_MOT: break; case RoQ_ID_FCC: mx = 8 - (buf[bpos] >> 4) - ((signed char) (chunk_arg >> 8)); my = 8 - (buf[bpos++] & 0xf) - ((signed char) chunk_arg); ff_apply_motion_8x8(ri, xp, yp, mx, my); break; case RoQ_ID_SLD: qcell = ri->cb4x4 + buf[bpos++]; ff_apply_vector_4x4(ri, xp, yp, ri->cb2x2 + qcell->idx[0]); ff_apply_vector_4x4(ri, xp+4, yp, ri->cb2x2 + qcell->idx[1]); ff_apply_vector_4x4(ri, xp, yp+4, ri->cb2x2 + qcell->idx[2]); ff_apply_vector_4x4(ri, xp+4, yp+4, ri->cb2x2 + qcell->idx[3]); break; case RoQ_ID_CCC: for (k = 0; k < 4; k++) { x = xp; y = yp; if(k & 0x01) x += 4; if(k & 0x02) y += 4; if (bpos >= chunk_size) { av_log(ri->avctx, AV_LOG_ERROR, "Input buffer too small\n"); return; } if (vqflg_pos < 0) { vqflg = buf[bpos++]; vqflg |= (buf[bpos++] << 8); vqflg_pos = 7; } vqid = (vqflg >> (vqflg_pos * 2)) & 0x3; frame_stats[1][vqid]++; vqflg_pos--; switch(vqid) { case RoQ_ID_MOT: break; case RoQ_ID_FCC: mx = 8 - (buf[bpos] >> 4) - ((signed char) (chunk_arg >> 8)); my = 8 - (buf[bpos++] & 0xf) - ((signed char) chunk_arg); ff_apply_motion_4x4(ri, x, y, mx, my); break; case RoQ_ID_SLD: qcell = ri->cb4x4 + buf[bpos++]; ff_apply_vector_2x2(ri, x, y, ri->cb2x2 + qcell->idx[0]); ff_apply_vector_2x2(ri, x+2, y, ri->cb2x2 + qcell->idx[1]); ff_apply_vector_2x2(ri, x, y+2, ri->cb2x2 + qcell->idx[2]); ff_apply_vector_2x2(ri, x+2, y+2, ri->cb2x2 + qcell->idx[3]); break; case RoQ_ID_CCC: ff_apply_vector_2x2(ri, x, y, ri->cb2x2 + buf[bpos]); ff_apply_vector_2x2(ri, x+2, y, ri->cb2x2 + buf[bpos+1]); ff_apply_vector_2x2(ri, x, y+2, ri->cb2x2 + buf[bpos+2]); ff_apply_vector_2x2(ri, x+2, y+2, ri->cb2x2 + buf[bpos+3]); bpos += 4; break; } } break; default: av_log(ri->avctx, AV_LOG_ERROR, "Unknown vq code: %d\n", vqid); } } xpos += 16; if (xpos >= ri->width) { xpos -= ri->width; ypos += 16; } if(ypos >= ri->height) break; } }