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avcodec/ac3enc_template: Avoid always-true check 

This might also help Coverity with issue #1596532.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2024-05-17 18:51:55 +02:00
parent f3d206d25f
commit e863cbceae
1 changed files with 7 additions and 4 deletions
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11
libavcodec/ac3enc_template.c
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@ -31,6 +31,7 @@
#include <stdint.h>
#include "libavutil/attributes.h"
#include "libavutil/avassert.h"
#include "libavutil/mem_internal.h"
#include "audiodsp.h"
@ -50,14 +51,15 @@
*/
static void apply_mdct(AC3EncodeContext *s, uint8_t * const *samples)
{
int blk, ch;
av_assert1(s->num_blocks > 0);
for (ch = 0; ch < s->channels; ch++) {
for (int ch = 0; ch < s->channels; ch++) {
const SampleType *input_samples0 = (const SampleType*)s->planar_samples[ch];
/* Reorder channels from native order to AC-3 order. */
const SampleType *input_samples1 = (const SampleType*)samples[s->channel_map[ch]];
int blk = 0;
for (blk = 0; blk < s->num_blocks; blk++) {
do {
AC3Block *block = &s->blocks[blk];
SampleType *windowed_samples = s->RENAME(windowed_samples);
@ -71,7 +73,8 @@ static void apply_mdct(AC3EncodeContext *s, uint8_t * const *samples)
windowed_samples, sizeof(*windowed_samples));
input_samples0 = input_samples1;
input_samples1 += AC3_BLOCK_SIZE;
}
} while (++blk < s->num_blocks);
/* Store last 256 samples of current frame */
memcpy(s->planar_samples[ch], input_samples0,
AC3_BLOCK_SIZE * sizeof(*input_samples0));