diff options
Diffstat (limited to 'src/libjpeg/jccoefct.c')
| -rw-r--r-- | src/libjpeg/jccoefct.c | 24 |
1 files changed, 14 insertions, 10 deletions
diff --git a/src/libjpeg/jccoefct.c b/src/libjpeg/jccoefct.c index 1963ddb..d775313 100644 --- a/src/libjpeg/jccoefct.c +++ b/src/libjpeg/jccoefct.c @@ -149,6 +149,7 @@ compress_data (j_compress_ptr cinfo, JSAMPIMAGE input_buf) int blkn, bi, ci, yindex, yoffset, blockcnt; JDIMENSION ypos, xpos; jpeg_component_info *compptr; + forward_DCT_ptr forward_DCT; /* Loop to write as much as one whole iMCU row */ for (yoffset = coef->MCU_vert_offset; yoffset < coef->MCU_rows_per_iMCU_row; @@ -167,17 +168,19 @@ compress_data (j_compress_ptr cinfo, JSAMPIMAGE input_buf) blkn = 0; for (ci = 0; ci < cinfo->comps_in_scan; ci++) { compptr = cinfo->cur_comp_info[ci]; + forward_DCT = cinfo->fdct->forward_DCT[compptr->component_index]; blockcnt = (MCU_col_num < last_MCU_col) ? compptr->MCU_width : compptr->last_col_width; xpos = MCU_col_num * compptr->MCU_sample_width; - ypos = yoffset * DCTSIZE; /* ypos == (yoffset+yindex) * DCTSIZE */ + ypos = yoffset * compptr->DCT_v_scaled_size; + /* ypos == (yoffset+yindex) * DCTSIZE */ for (yindex = 0; yindex < compptr->MCU_height; yindex++) { if (coef->iMCU_row_num < last_iMCU_row || yoffset+yindex < compptr->last_row_height) { - (*cinfo->fdct->forward_DCT) (cinfo, compptr, - input_buf[compptr->component_index], - coef->MCU_buffer[blkn], - ypos, xpos, (JDIMENSION) blockcnt); + (*forward_DCT) (cinfo, compptr, + input_buf[compptr->component_index], + coef->MCU_buffer[blkn], + ypos, xpos, (JDIMENSION) blockcnt); if (blockcnt < compptr->MCU_width) { /* Create some dummy blocks at the right edge of the image. */ jzero_far((void FAR *) coef->MCU_buffer[blkn + blockcnt], @@ -195,7 +198,7 @@ compress_data (j_compress_ptr cinfo, JSAMPIMAGE input_buf) } } blkn += compptr->MCU_width; - ypos += DCTSIZE; + ypos += compptr->DCT_v_scaled_size; } } /* Try to write the MCU. In event of a suspension failure, we will @@ -252,6 +255,7 @@ compress_first_pass (j_compress_ptr cinfo, JSAMPIMAGE input_buf) jpeg_component_info *compptr; JBLOCKARRAY buffer; JBLOCKROW thisblockrow, lastblockrow; + forward_DCT_ptr forward_DCT; for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; ci++, compptr++) { @@ -274,15 +278,15 @@ compress_first_pass (j_compress_ptr cinfo, JSAMPIMAGE input_buf) ndummy = (int) (blocks_across % h_samp_factor); if (ndummy > 0) ndummy = h_samp_factor - ndummy; + forward_DCT = cinfo->fdct->forward_DCT[ci]; /* Perform DCT for all non-dummy blocks in this iMCU row. Each call * on forward_DCT processes a complete horizontal row of DCT blocks. */ for (block_row = 0; block_row < block_rows; block_row++) { thisblockrow = buffer[block_row]; - (*cinfo->fdct->forward_DCT) (cinfo, compptr, - input_buf[ci], thisblockrow, - (JDIMENSION) (block_row * DCTSIZE), - (JDIMENSION) 0, blocks_across); + (*forward_DCT) (cinfo, compptr, input_buf[ci], thisblockrow, + (JDIMENSION) (block_row * compptr->DCT_v_scaled_size), + (JDIMENSION) 0, blocks_across); if (ndummy > 0) { /* Create dummy blocks at the right edge of the image. */ thisblockrow += blocks_across; /* => first dummy block */ |