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aacenc: replace VLA with fixed size

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Number of channels is restricted to 6 so the size is acceptable
for the stack.

Originally committed as revision 24068 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2010-07-06 00:06:15 +00:00
parent 1b364fd26e
commit 86e41bc300
1 changed files with 4 additions and 2 deletions
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6
libavcodec/aacenc.c
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@ -41,6 +41,8 @@
#include "psymodel.h" #include "psymodel.h"
#define AAC_MAX_CHANNELS 6
static const uint8_t swb_size_1024_96[] = { static const uint8_t swb_size_1024_96[] = {
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 8, 8, 8, 8, 8,
12, 12, 12, 12, 12, 16, 16, 24, 28, 36, 44, 12, 12, 12, 12, 12, 16, 16, 24, 28, 36, 44,
@ -166,7 +168,7 @@ static av_cold int aac_encode_init(AVCodecContext *avctx)
av_log(avctx, AV_LOG_ERROR, "Unsupported sample rate %d\n", avctx->sample_rate); av_log(avctx, AV_LOG_ERROR, "Unsupported sample rate %d\n", avctx->sample_rate);
return -1; return -1;
} }
if (avctx->channels > 6) { if (avctx->channels > AAC_MAX_CHANNELS) {
av_log(avctx, AV_LOG_ERROR, "Unsupported number of channels: %d\n", avctx->channels); av_log(avctx, AV_LOG_ERROR, "Unsupported number of channels: %d\n", avctx->channels);
return -1; return -1;
} }
@ -486,7 +488,7 @@ static int aac_encode_frame(AVCodecContext *avctx,
int i, j, chans, tag, start_ch; int i, j, chans, tag, start_ch;
const uint8_t *chan_map = aac_chan_configs[avctx->channels-1]; const uint8_t *chan_map = aac_chan_configs[avctx->channels-1];
int chan_el_counter[4]; int chan_el_counter[4];
FFPsyWindowInfo windows[avctx->channels]; FFPsyWindowInfo windows[AAC_MAX_CHANNELS];
if (s->last_frame) if (s->last_frame)
return 0; return 0;