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Better handle channel configs when monoizing in LoadSound

This commit is contained in:
Chris Robinson 2016-05-04 12:05:43 -07:00 committed by Christoph Oelckers
parent e298f8389b
commit 0b7b78c5d2
1 changed files with 28 additions and 11 deletions
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39
src/sound/oalsound.cpp
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@ -40,6 +40,7 @@
#include <dlfcn.h>
#endif
#include <memory>
#include <chrono>
#include "except.h"
@ -636,6 +637,15 @@ extern ReverbContainer *ForcedEnvironment;
#define PITCH(pitch) (snd_pitched ? (pitch)/128.f : 1.f)
static size_t GetChannelCount(ChannelConfig chans)
{
switch(chans)
{
case ChannelConfig_Mono: return 1;
case ChannelConfig_Stereo: return 2;
}
return 0;
}
static float GetRolloff(const FRolloffInfo *rolloff, float distance)
{
@ -1142,7 +1152,7 @@ std::pair<SoundHandle,bool> OpenALSoundRenderer::LoadSound(BYTE *sfxdata, int le
SampleType type;
int srate;
SoundDecoder *decoder = CreateDecoder(&reader);
std::unique_ptr<SoundDecoder> decoder(CreateDecoder(&reader));
if(!decoder) return std::make_pair(retval, true);
decoder->getInfo(&srate, &chans, &type);
@ -1161,46 +1171,53 @@ std::pair<SoundHandle,bool> OpenALSoundRenderer::LoadSound(BYTE *sfxdata, int le
{
Printf("Unsupported audio format: %s, %s\n", GetChannelConfigName(chans),
GetSampleTypeName(type));
delete decoder;
return std::make_pair(retval, true);
}
TArray<char> data = decoder->readAll();
if(chans != ChannelConfig_Mono && monoize)
{
// TODO: Handle this better if ChannelConfig ever gets more channel configurations.
size_t frames = data.Size() / 2 / (type == SampleType_Int16 ? 2 : 1);
size_t chancount = GetChannelCount(chans);
size_t frames = data.Size() / chancount /
(type == SampleType_Int16 ? 2 : 1);
if(type == SampleType_Int16)
{
short *sfxdata = (short*)&data[0];
for(size_t i = 0;i < frames;i++)
sfxdata[i] = (sfxdata[i*2 + 0]-0 + sfxdata[i*2 + 1]-0)/2;
{
int sum = 0;
for(size_t c = 0;c < chancount;c++)
sum += sfxdata[i*chancount + c];
sfxdata[i] = sum / chancount;
}
}
else if(type == SampleType_UInt8)
{
BYTE *sfxdata = (BYTE*)&data[0];
for(size_t i = 0;i < frames;i++)
sfxdata[i] = (sfxdata[i*2 + 0]-128 + sfxdata[i*2 + 1]-128)/2 + 128;
{
int sum = 0;
for(size_t c = 0;c < chancount;c++)
sum += sfxdata[i*chancount + c] - 128;
sfxdata[i] = (sum / chancount) + 128;
}
}
data.Resize(data.Size()/2);
data.Resize(data.Size()/chancount);
}
ALenum err;
ALuint buffer = 0;
alGenBuffers(1, &buffer);
alBufferData(buffer, format, &data[0], data.Size(), srate);
ALenum err;
if((err=getALError()) != AL_NO_ERROR)
{
Printf("Failed to buffer data: %s\n", alGetString(err));
alDeleteBuffers(1, &buffer);
getALError();
delete decoder;
return std::make_pair(retval, true);
}
retval.data = MAKE_PTRID(buffer);
delete decoder;
return std::make_pair(retval, (chans == ChannelConfig_Mono || monoize));
}