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avcodec/wavpackenc: handle INT32_MIN samples

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abs() cannot represent the magnitude of INT32_MIN. labs() has the same issue on platforms where long is 32 bits. use FFABSU for the full signed sample range.

Signed-off-by: Ayoub Nabil Boubagrat <237098474+ayoubnabil@users.noreply.github.com>
(cherry picked from commit 4021d0d193)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Ayoub Nabil Boubagrat
2026-08-27 20:17:09 +02:00
committed by Michael Niedermayer
parent f5911d012c
commit 6bb0f2ae77
1 changed files with 7 additions and 4 deletions
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11
libavcodec/wavpackenc.c
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@@ -662,8 +662,9 @@ static uint32_t log2mono(int32_t *samples, int nb_samples, int limit)
{
uint32_t result = 0;
while (nb_samples--) {
if (log2sample(abs(*samples++), limit, &result))
if (log2sample(FFABSU(samples[0]), limit, &result))
return UINT32_MAX;
samples++;
}
return result;
}
@@ -673,9 +674,11 @@ static uint32_t log2stereo(int32_t *samples_l, int32_t *samples_r,
{
uint32_t result = 0;
while (nb_samples--) {
if (log2sample(abs(*samples_l++), limit, &result) ||
log2sample(abs(*samples_r++), limit, &result))
if (log2sample(FFABSU(samples_l[0]), limit, &result) ||
log2sample(FFABSU(samples_r[0]), limit, &result))
return UINT32_MAX;
samples_l++;
samples_r++;
}
return result;
}
@@ -991,7 +994,7 @@ static void scan_word(WavPackEncodeContext *s, WvChannel *c,
samples += nb_samples - 1;
while (nb_samples--) {
uint32_t low, value = labs(samples[0]);
uint32_t low, value = FFABSU(samples[0]);
if (value < GET_MED(0)) {
DEC_MED(0);