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Optimizes precalculated decoder block ptrs&offs

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The block pointers and offset do not need to be calculated for every
frame. Block internal predictors can be update once when decoder is
allocated. Destination and previous buffer offsets have to be updated
just when frame size is changing.

Change-Id: I92ca8df0e6aaac4cc35ab890751d446760bf82e2
This commit is contained in:
Attila Nagy
2012-04-23 15:20:07 +03:00
parent abf1784c31
commit 175495fe73
3 changed files with 18 additions and 5 deletions
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17
vp8/decoder/decodframe.c
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@@ -737,6 +737,8 @@ int vp8_decode_frame(VP8D_COMP *pbi)
int corrupt_tokens = 0;
int prev_independent_partitions = pbi->independent_partitions;
int frame_size_change = 0;
/* start with no corruption of current frame */
xd->corrupted = 0;
pc->yv12_fb[pc->new_fb_idx].corrupted = 0;
@@ -840,6 +842,7 @@ int vp8_decode_frame(VP8D_COMP *pbi)
if (pbi->b_multithreaded_rd)
vp8mt_alloc_temp_buffers(pbi, pc->Width, prev_mb_rows);
#endif
frame_size_change = 1;
}
}
}
@@ -1103,9 +1106,17 @@ int vp8_decode_frame(VP8D_COMP *pbi)
#endif
vp8_setup_intra_recon(&pc->yv12_fb[pc->new_fb_idx]);
vp8_setup_block_dptrs(xd);
vp8_build_block_doffsets(xd);
if(frame_size_change)
{
#if CONFIG_MULTITHREAD
for (i = 0; i < pbi->allocated_decoding_thread_count; i++)
{
pbi->mb_row_di[i].mbd.dst = pc->yv12_fb[pc->new_fb_idx];
vp8_build_block_doffsets(&pbi->mb_row_di[i].mbd);
}
#endif
vp8_build_block_doffsets(&pbi->mb);
}
/* clear out the coeff buffer */
vpx_memset(xd->qcoeff, 0, sizeof(xd->qcoeff));