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AudioCommon: restore support for DTK volume setting.

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This commit is contained in:
magumagu
2014-06-26 16:15:18 -07:00
parent 1f604e87be
commit ca0203a1cc
3 changed files with 32 additions and 2 deletions
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20
Source/Core/AudioCommon/Mixer.cpp
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@ -54,6 +54,9 @@ unsigned int CMixer::MixerFifo::Mix(short* samples, unsigned int numSamples, boo
static u32 frac = 0;
const u32 ratio = (u32)( 65536.0f * aid_sample_rate / (float)m_mixer->m_sampleRate );
s32 lvolume = m_LVolume;
s32 rvolume = m_RVolume;
// TODO: consider a higher-quality resampling algorithm.
for (; currentSample < numSamples*2 && ((indexW-indexR) & INDEX_MASK) > 2; currentSample+=2) {
u32 indexR2 = indexR + 2; //next sample
@ -61,6 +64,7 @@ unsigned int CMixer::MixerFifo::Mix(short* samples, unsigned int numSamples, boo
s16 l1 = Common::swap16(m_buffer[indexR & INDEX_MASK]); //current
s16 l2 = Common::swap16(m_buffer[indexR2 & INDEX_MASK]); //next
int sampleL = ((l1 << 16) + (l2 - l1) * (u16)frac) >> 16;
sampleL = (sampleL * lvolume) >> 8;
sampleL += samples[currentSample + 1];
MathUtil::Clamp(&sampleL, -32767, 32767);
samples[currentSample+1] = sampleL;
@ -68,6 +72,7 @@ unsigned int CMixer::MixerFifo::Mix(short* samples, unsigned int numSamples, boo
s16 r1 = Common::swap16(m_buffer[(indexR + 1) & INDEX_MASK]); //current
s16 r2 = Common::swap16(m_buffer[(indexR2 + 1) & INDEX_MASK]); //next
int sampleR = ((r1 << 16) + (r2 - r1) * (u16)frac) >> 16;
sampleR = (sampleR * rvolume) >> 8;
sampleR += samples[currentSample];
MathUtil::Clamp(&sampleR, -32767, 32767);
samples[currentSample] = sampleR;
@ -81,7 +86,9 @@ unsigned int CMixer::MixerFifo::Mix(short* samples, unsigned int numSamples, boo
short s[2];
s[0] = Common::swap16(m_buffer[(indexR - 1) & INDEX_MASK]);
s[1] = Common::swap16(m_buffer[(indexR - 2) & INDEX_MASK]);
for (; currentSample < numSamples*2; currentSample+=2)
s[0] = (s[0] * lvolume) >> 8;
s[1] = (s[1] * rvolume) >> 8;
for (; currentSample < numSamples * 2; currentSample += 2)
{
int sampleR = s[0] + samples[currentSample];
MathUtil::Clamp(&sampleR, -32767, 32767);
@ -174,3 +181,14 @@ void CMixer::PushStreamingSamples(const short *samples, unsigned int num_samples
{
m_streaming_mixer.PushSamples(samples, num_samples);
}
void CMixer::SetStreamingVolume(unsigned int lvolume, unsigned int rvolume)
{
m_streaming_mixer.SetVolume(lvolume, rvolume);
}
void CMixer::MixerFifo::SetVolume(unsigned int lvolume, unsigned int rvolume)
{
m_LVolume = lvolume + (lvolume >> 7);
m_RVolume = rvolume + (rvolume >> 7);
}