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Fix resample

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This commit is contained in:
isaac 2026-04-21 22:04:47 +04:00
parent 4464802051
commit da1629328f
1 changed files with 23 additions and 8 deletions
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31
submodules/FFMpegBinding/Sources/FFMpegSWResample.m
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@ -111,22 +111,37 @@
return nil;
}
int64_t outSamples = (int64_t)frameImpl->nb_samples * (int64_t)_ratio;
// Cap at 8M samples per frame: ~10× larger than any legitimate codec
// frame × resample ratio, bounds the per-frame buffer to ~32 MB (s16 stereo),
// and rejects pathological inputs (e.g. 1 Hz source with a 65 KB FLAC block).
if (outSamples <= 0 || outSamples > 8 * 1024 * 1024) {
return nil;
}
int bufSize = av_samples_get_buffer_size(NULL,
(int)_destinationChannelCount,
frameImpl->nb_samples * (int)_ratio,
(int)outSamples,
(enum AVSampleFormat)_destinationSampleFormat,
1);
if (!_buffer || _bufferSize < bufSize) {
_bufferSize = bufSize;
_buffer = realloc(_buffer, _bufferSize);
if (bufSize <= 0) {
return nil;
}
if (!_buffer || _bufferSize < bufSize) {
void *newBuffer = realloc(_buffer, bufSize);
if (!newBuffer) {
return nil;
}
_buffer = newBuffer;
_bufferSize = bufSize;
}
Byte *outbuf[2] = { _buffer, 0 };
int numFrames = swr_convert(_context,
outbuf,
frameImpl->nb_samples * (int)_ratio,
(int)outSamples,
(const uint8_t **)frameImpl->data,
frameImpl->nb_samples);
if (numFrames <= 0) {