- if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < width*3*4){
- av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
- return -1;
- }
-
- for(i=0; i<3; i++){
- top[i]= left[i]= topleft[i]= buffer[0][i];
- }
- for(x = 0; x < width; x++) {
- buffer[x][1] = ptr[4*x+0] - ptr[4*x+1] + 0x100;
- buffer[x][2] = ptr[4*x+2] - ptr[4*x+1] + 0x100;
- buffer[x][0] = (ptr[4*x+0] + 2*ptr[4*x+1] + ptr[4*x+2])>>2;
-
- for(i=0;i<3;i++) {
- int pred, diff;
-
- PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
-
- topleft[i]= top[i];
- top[i]= buffer[x+1][i];
-
- left[i]= buffer[x][i];
-
- diff= ((left[i] - pred + 0x100)&0x1FF) - 0x100;
-
- if(i==0)
- mjpeg_encode_dc(s, diff, m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
- else
- mjpeg_encode_dc(s, diff, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
- }
- }
- }
- }else{
- int mb_x, mb_y, i;
- const int mb_width = (width + s->mjpeg_hsample[0] - 1) / s->mjpeg_hsample[0];
- const int mb_height = (height + s->mjpeg_vsample[0] - 1) / s->mjpeg_vsample[0];
-
- for(mb_y = 0; mb_y < mb_height; mb_y++) {
- if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < mb_width * 4 * 3 * s->mjpeg_hsample[0] * s->mjpeg_vsample[0]){
- av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
- return -1;
- }
- for(mb_x = 0; mb_x < mb_width; mb_x++) {
- if(mb_x==0 || mb_y==0){
- for(i=0;i<3;i++) {
- uint8_t *ptr;
- int x, y, h, v, linesize;
- h = s->mjpeg_hsample[i];
- v = s->mjpeg_vsample[i];
- linesize= p->linesize[i];
-
- for(y=0; y<v; y++){
- for(x=0; x<h; x++){
- int pred;
-
- ptr = p->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
- if(y==0 && mb_y==0){
- if(x==0 && mb_x==0){
- pred= 128;
- }else{
- pred= ptr[-1];
- }
- }else{
- if(x==0 && mb_x==0){
- pred= ptr[-linesize];
- }else{
- PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
- }
- }
-
- if(i==0)
- mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
- else
- mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
- }
- }
- }
- }else{
- for(i=0;i<3;i++) {
- uint8_t *ptr;
- int x, y, h, v, linesize;
- h = s->mjpeg_hsample[i];
- v = s->mjpeg_vsample[i];
- linesize= p->linesize[i];
-
- for(y=0; y<v; y++){
- for(x=0; x<h; x++){
- int pred;
-
- ptr = p->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
-//printf("%d %d %d %d %8X\n", mb_x, mb_y, x, y, ptr);
- PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
-
- if(i==0)
- mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
- else
- mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
- }
- }
- }
- }
- }
- }
- }
-
- emms_c();
-
- mjpeg_picture_trailer(s);
- s->picture_number++;
-
- flush_put_bits(&s->pb);
- return pbBufPtr(&s->pb) - s->pb.buf;
-// return (put_bits_count(&f->pb)+7)/8;