[SCM] libav/experimental: Rearrange exponent buffer to group all blocks for a single channel together. This will allow for faster and simpler processing of all blocks at once.
siretart at users.alioth.debian.org
siretart at users.alioth.debian.org
Sun Jun 30 17:21:54 UTC 2013
The following commit has been merged in the experimental branch:
commit 7cc4be58b4daecd256deba31e5caf5bb11870f15
Author: Justin Ruggles <justin.ruggles at gmail.com>
Date: Sat Jan 15 01:58:45 2011 +0000
Rearrange exponent buffer to group all blocks for a single channel together.
This will allow for faster and simpler processing of all blocks at once.
Originally committed as revision 26351 to svn://svn.ffmpeg.org/ffmpeg/trunk
diff --git a/libavcodec/ac3enc.c b/libavcodec/ac3enc.c
index f968834..1a87bb9 100644
--- a/libavcodec/ac3enc.c
+++ b/libavcodec/ac3enc.c
@@ -1757,14 +1757,17 @@ static av_cold int allocate_buffers(AVCodecContext *avctx)
alloc_fail);
for (ch = 0; ch < s->channels; ch++) {
+ /* arrangement: block, channel, coeff */
block->bap[ch] = &s->bap_buffer [AC3_MAX_COEFS * (blk * s->channels + ch)];
block->mdct_coef[ch] = &s->mdct_coef_buffer [AC3_MAX_COEFS * (blk * s->channels + ch)];
- block->exp[ch] = &s->exp_buffer [AC3_MAX_COEFS * (blk * s->channels + ch)];
block->grouped_exp[ch] = &s->grouped_exp_buffer[128 * (blk * s->channels + ch)];
block->psd[ch] = &s->psd_buffer [AC3_MAX_COEFS * (blk * s->channels + ch)];
block->band_psd[ch] = &s->band_psd_buffer [64 * (blk * s->channels + ch)];
block->mask[ch] = &s->mask_buffer [64 * (blk * s->channels + ch)];
block->qmant[ch] = &s->qmant_buffer [AC3_MAX_COEFS * (blk * s->channels + ch)];
+
+ /* arrangement: channel, block, coeff */
+ block->exp[ch] = &s->exp_buffer [AC3_MAX_COEFS * (AC3_MAX_BLOCKS * ch + blk)];
}
}
--
Libav/FFmpeg packaging
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