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- fix Opus decoder for stereo audio

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This commit is contained in:
Dmytro Bogovych
2023-04-10 13:10:43 +03:00
parent 5182cb8379
commit 8ee306fb76
2 changed files with 10 additions and 8 deletions
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14
src/engine/media/MT_AudioCodec.cpp
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@@ -493,16 +493,18 @@ int OpusCodec::encode(const void* input, int inputBytes, void* output, int outpu
int OpusCodec::decode(const void* input, int inputBytes, void* output, int outputCapacity)
{
int nrOfChannelsInPacket = opus_packet_get_nb_channels((const unsigned char*)input);
assert(nrOfChannelsInPacket == 1);
int nr_of_channels = opus_packet_get_nb_channels((const unsigned char*)input);
assert(nr_of_channels == channels());
int nrOfSamplesInPacket = opus_decoder_get_nb_samples(mDecoderCtx, (const unsigned char*)input, inputBytes);
if (nrOfSamplesInPacket > 0)
int nr_of_frames = opus_decoder_get_nb_samples(mDecoderCtx, (const unsigned char*)input, inputBytes);
if (nr_of_frames > 0)
{
// Send number of bytes for input and number of samples for output
int capacity = nrOfSamplesInPacket * sizeof(opus_int16) * channels();
int capacity = nr_of_frames * sizeof(opus_int16) * channels();
// Dangerous !
opus_int16* buffer = (opus_int16*)alloca(capacity);
int decoded = opus_decode(mDecoderCtx, (const unsigned char*)input, inputBytes, (opus_int16*)buffer, capacity / (sizeof(short) * channels()), 1);
int decoded = opus_decode(mDecoderCtx, (const unsigned char*)input, inputBytes, (opus_int16*)buffer, capacity / (sizeof(short) * channels()), 0 /* FEC decoding is for lost packets */);
if (decoded < 0)
return 0;
else