-/*
- * This function performs the final rendering of each fragment's data
- * onto the output frame.
- */
-static void render_fragments(Vp3DecodeContext *s,
- int first_fragment,
- int width,
- int height,
- int plane /* 0 = Y, 1 = U, 2 = V */)
-{
- int x, y;
- int m, n;
- int i = first_fragment;
- int16_t *dequantizer;
- DCTELEM __align16 block[64];
- unsigned char *output_plane;
- unsigned char *last_plane;
- unsigned char *golden_plane;
- int stride;
- int motion_x = 0xdeadbeef, motion_y = 0xdeadbeef;
- int upper_motion_limit, lower_motion_limit;
- int motion_halfpel_index;
- uint8_t *motion_source;
-
- debug_vp3(" vp3: rendering final fragments for %s\n",
- (plane == 0) ? "Y plane" : (plane == 1) ? "U plane" : "V plane");
-
- /* set up plane-specific parameters */
- if (plane == 0) {
- output_plane = s->current_frame.data[0];
- last_plane = s->last_frame.data[0];
- golden_plane = s->golden_frame.data[0];
- stride = s->current_frame.linesize[0];
- if (!s->flipped_image) stride = -stride;
- upper_motion_limit = 7 * s->current_frame.linesize[0];
- lower_motion_limit = height * s->current_frame.linesize[0] + width - 8;
- } else if (plane == 1) {
- output_plane = s->current_frame.data[1];
- last_plane = s->last_frame.data[1];
- golden_plane = s->golden_frame.data[1];
- stride = s->current_frame.linesize[1];
- if (!s->flipped_image) stride = -stride;
- upper_motion_limit = 7 * s->current_frame.linesize[1];
- lower_motion_limit = height * s->current_frame.linesize[1] + width - 8;
- } else {
- output_plane = s->current_frame.data[2];
- last_plane = s->last_frame.data[2];
- golden_plane = s->golden_frame.data[2];
- stride = s->current_frame.linesize[2];
- if (!s->flipped_image) stride = -stride;
- upper_motion_limit = 7 * s->current_frame.linesize[2];
- lower_motion_limit = height * s->current_frame.linesize[2] + width - 8;
- }
-
- if(ABS(stride) > 2048)
- return; //various tables are fixed size
-
- /* for each fragment row... */
- for (y = 0; y < height; y += 8) {
-
- /* for each fragment in a row... */
- for (x = 0; x < width; x += 8, i++) {
-
- if ((i < 0) || (i >= s->fragment_count)) {
- av_log(s->avctx, AV_LOG_ERROR, " vp3:render_fragments(): bad fragment number (%d)\n", i);
- return;
- }
-
- /* transform if this block was coded */
- if ((s->all_fragments[i].coding_method != MODE_COPY) &&
- !((s->avctx->flags & CODEC_FLAG_GRAY) && plane)) {
-
- if ((s->all_fragments[i].coding_method == MODE_USING_GOLDEN) ||
- (s->all_fragments[i].coding_method == MODE_GOLDEN_MV))
- motion_source= golden_plane;
- else
- motion_source= last_plane;
-
- motion_source += s->all_fragments[i].first_pixel;
- motion_halfpel_index = 0;
-
- /* sort out the motion vector if this fragment is coded
- * using a motion vector method */
- if ((s->all_fragments[i].coding_method > MODE_INTRA) &&
- (s->all_fragments[i].coding_method != MODE_USING_GOLDEN)) {
- int src_x, src_y;
- motion_x = s->all_fragments[i].motion_x;
- motion_y = s->all_fragments[i].motion_y;
- if(plane){
- motion_x= (motion_x>>1) | (motion_x&1);
- motion_y= (motion_y>>1) | (motion_y&1);
- }
-
- src_x= (motion_x>>1) + x;
- src_y= (motion_y>>1) + y;
- if ((motion_x == 127) || (motion_y == 127))
- av_log(s->avctx, AV_LOG_ERROR, " help! got invalid motion vector! (%X, %X)\n", motion_x, motion_y);
-
- motion_halfpel_index = motion_x & 0x01;
- motion_source += (motion_x >> 1);
-
- motion_halfpel_index |= (motion_y & 0x01) << 1;
- motion_source += ((motion_y >> 1) * stride);
-
- if(src_x<0 || src_y<0 || src_x + 9 >= width || src_y + 9 >= height){
- uint8_t *temp= s->edge_emu_buffer;
- if(stride<0) temp -= 9*stride;
- else temp += 9*stride;
-
- ff_emulated_edge_mc(temp, motion_source, stride, 9, 9, src_x, src_y, width, height);
- motion_source= temp;
- }
- }
-
-
- /* first, take care of copying a block from either the
- * previous or the golden frame */
- if (s->all_fragments[i].coding_method != MODE_INTRA) {
- //Note, it is possible to implement all MC cases with put_no_rnd_pixels_l2 which would look more like the VP3 source but this would be slower as put_no_rnd_pixels_tab is better optimzed
- if(motion_halfpel_index != 3){
- s->dsp.put_no_rnd_pixels_tab[1][motion_halfpel_index](
- output_plane + s->all_fragments[i].first_pixel,
- motion_source, stride, 8);
- }else{
- int d= (motion_x ^ motion_y)>>31; // d is 0 if motion_x and _y have the same sign, else -1
- s->dsp.put_no_rnd_pixels_l2[1](
- output_plane + s->all_fragments[i].first_pixel,
- motion_source - d,
- motion_source + stride + 1 + d,
- stride, 8);
- }
- dequantizer = s->inter_dequant;
- }else{
- if (plane == 0)
- dequantizer = s->intra_y_dequant;
- else
- dequantizer = s->intra_c_dequant;
- }
-
- /* dequantize the DCT coefficients */
- debug_idct("fragment %d, coding mode %d, DC = %d, dequant = %d:\n",
- i, s->all_fragments[i].coding_method,
- DC_COEFF(i), dequantizer[0]);
-
- if(s->avctx->idct_algo==FF_IDCT_VP3){
- Coeff *coeff= s->coeffs + i;
- memset(block, 0, sizeof(block));
- while(coeff->next){
- block[coeff->index]= coeff->coeff * dequantizer[coeff->index];
- coeff= coeff->next;
- }
- }else{
- Coeff *coeff= s->coeffs + i;
- memset(block, 0, sizeof(block));
- while(coeff->next){
- block[coeff->index]= (coeff->coeff * dequantizer[coeff->index] + 2)>>2;
- coeff= coeff->next;
- }
- }
-
- /* invert DCT and place (or add) in final output */
-
- if (s->all_fragments[i].coding_method == MODE_INTRA) {
- if(s->avctx->idct_algo!=FF_IDCT_VP3)
- block[0] += 128<<3;
- s->dsp.idct_put(
- output_plane + s->all_fragments[i].first_pixel,
- stride,
- block);
- } else {
- s->dsp.idct_add(
- output_plane + s->all_fragments[i].first_pixel,
- stride,
- block);
- }
-
- debug_idct("block after idct_%s():\n",
- (s->all_fragments[i].coding_method == MODE_INTRA)?
- "put" : "add");
- for (m = 0; m < 8; m++) {
- for (n = 0; n < 8; n++) {
- debug_idct(" %3d", *(output_plane +
- s->all_fragments[i].first_pixel + (m * stride + n)));
- }
- debug_idct("\n");
- }
- debug_idct("\n");
-
- } else {
-
- /* copy directly from the previous frame */
- s->dsp.put_pixels_tab[1][0](
- output_plane + s->all_fragments[i].first_pixel,
- last_plane + s->all_fragments[i].first_pixel,
- stride, 8);
-
- }
- }
- }
-
- emms_c();
-}
-