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avfilter/silenceremove_template: fix peak detector 

The implementation was not working correctly.
This commit is contained in:
Paul B Mahol 2023-05-26 22:29:31 +02:00
parent 29710dd7f2
commit 68d0b881de
1 changed files with 28 additions and 12 deletions
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40
libavfilter/silenceremove_template.c
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@ -117,33 +117,49 @@ static ftype fn(compute_peak)(ftype *peak, ftype sample, ftype wsample,
ftype r, abs_sample = FABS(sample);
int front = *ffront;
int back = *bback;
int empty = front == back && peak[front] == ZERO;
if (front != back && abs_sample > peak[front]) {
while (front != back) {
if (!empty && FABS(wsample) == peak[front]) {
peak[front] = ZERO;
if (back != front) {
front--;
if (front < 0)
front = size - 1;
}
empty = front == back;
}
if (!empty && abs_sample >= peak[front]) {
while (1) {
peak[front] = ZERO;
if (back == front) {
empty = 1;
break;
}
front--;
if (front < 0)
front = size - 1;
}
}
while (front != back && abs_sample > peak[back]) {
while (!empty && abs_sample >= peak[back]) {
peak[back] = ZERO;
if (back == front) {
empty = 1;
break;
}
back++;
if (back >= size)
back = 0;
}
if (front != back && FABS(wsample) == peak[front]) {
front--;
if (front < 0)
front = size - 1;
if (!empty) {
back--;
if (back < 0)
back = size - 1;
}
back--;
if (back < 0)
back = size - 1;
av_assert2(back != front);
peak[back] = abs_sample;
r = peak[front];
*ffront = front;