- pa = ri->current_frame->data[0] + (y * ri->y_stride) + x;
- pb = ri->last_frame->data[0] + (my * ri->y_stride) + mx;
- for(i = 0; i < 8; i++) {
- pa[0] = pb[0];
- pa[1] = pb[1];
- pa[2] = pb[2];
- pa[3] = pb[3];
- pa[4] = pb[4];
- pa[5] = pb[5];
- pa[6] = pb[6];
- pa[7] = pb[7];
- pa += ri->y_stride;
- pb += ri->y_stride;
- }
-
- hw = ri->c_stride;
- pa = ri->current_frame->data[1] + (y * ri->y_stride)/4 + x/2;
- pb = ri->last_frame->data[1] + (my/2) * (ri->y_stride/2) + (mx + 1)/2;
- for(j = 0; j < 2; j++) {
- for(i = 0; i < 4; i++) {
- switch(((my & 0x01) << 1) | (mx & 0x01)) {
-
- case 0:
- pa[0] = pb[0];
- pa[1] = pb[1];
- pa[2] = pb[2];
- pa[3] = pb[3];
- break;
-
- case 1:
- pa[0] = avg2(pb[0], pb[1]);
- pa[1] = avg2(pb[1], pb[2]);
- pa[2] = avg2(pb[2], pb[3]);
- pa[3] = avg2(pb[3], pb[4]);
- break;
-
- case 2:
- pa[0] = avg2(pb[0], pb[hw]);
- pa[1] = avg2(pb[1], pb[hw+1]);
- pa[2] = avg2(pb[2], pb[hw+2]);
- pa[3] = avg2(pb[3], pb[hw+3]);
- break;
-
- case 3:
- pa[0] = avg4(pb[0], pb[1], pb[hw], pb[hw+1]);
- pa[1] = avg4(pb[1], pb[2], pb[hw+1], pb[hw+2]);
- pa[2] = avg4(pb[2], pb[3], pb[hw+2], pb[hw+3]);
- pa[3] = avg4(pb[3], pb[4], pb[hw+3], pb[hw+4]);
- break;
- }
- pa += ri->c_stride;
- pb += ri->c_stride;
- }
-
- pa = ri->current_frame->data[2] + (y * ri->y_stride)/4 + x/2;
- pb = ri->last_frame->data[2] + (my/2) * (ri->y_stride/2) + (mx + 1)/2;
- }
-}
-
-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;
- unsigned char *buf = ri->buf;
- 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->cells[i].y[0] = get_byte(buf);
- ri->cells[i].y[1] = get_byte(buf);
- ri->cells[i].y[2] = get_byte(buf);
- ri->cells[i].y[3] = get_byte(buf);
- ri->cells[i].u = get_byte(buf);
- ri->cells[i].v = get_byte(buf);
- }
- for(i = 0; i < nv2; i++)
- for(j = 0; j < 4; j++)
- ri->qcells[i].idx[j] = get_byte(buf);
- }