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Mixer: Support GBA samples mixing

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This commit is contained in:
Bonta 2021-07-04 12:44:56 +02:00
parent 1b27f22cbc
commit 502def7f71
2 changed files with 47 additions and 12 deletions
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41
Source/Core/AudioCommon/Mixer.cpp
View File

@ -47,6 +47,8 @@ void Mixer::DoState(PointerWrap& p)
m_dma_mixer.DoState(p);
m_streaming_mixer.DoState(p);
m_wiimote_speaker_mixer.DoState(p);
for (auto& mixer : m_gba_mixers)
mixer.DoState(p);
}
// Executed from sound stream thread
@ -93,20 +95,24 @@ unsigned int Mixer::MixerFifo::Mix(short* samples, unsigned int numSamples,
s32 lvolume = m_LVolume.load();
s32 rvolume = m_RVolume.load();
const auto read_buffer = [this](auto index) {
return m_little_endian ? m_buffer[index] : Common::swap16(m_buffer[index]);
};
// TODO: consider a higher-quality resampling algorithm.
for (; currentSample < numSamples * 2 && ((indexW - indexR) & INDEX_MASK) > 2; currentSample += 2)
{
u32 indexR2 = indexR + 2; // next sample
s16 l1 = Common::swap16(m_buffer[indexR & INDEX_MASK]); // current
s16 l2 = Common::swap16(m_buffer[indexR2 & INDEX_MASK]); // next
s16 l1 = read_buffer(indexR & INDEX_MASK); // current
s16 l2 = read_buffer(indexR2 & INDEX_MASK); // next
int sampleL = ((l1 << 16) + (l2 - l1) * (u16)m_frac) >> 16;
sampleL = (sampleL * lvolume) >> 8;
sampleL += samples[currentSample + 1];
samples[currentSample + 1] = std::clamp(sampleL, -32767, 32767);
s16 r1 = Common::swap16(m_buffer[(indexR + 1) & INDEX_MASK]); // current
s16 r2 = Common::swap16(m_buffer[(indexR2 + 1) & INDEX_MASK]); // next
s16 r1 = read_buffer((indexR + 1) & INDEX_MASK); // current
s16 r2 = read_buffer((indexR2 + 1) & INDEX_MASK); // next
int sampleR = ((r1 << 16) + (r2 - r1) * (u16)m_frac) >> 16;
sampleR = (sampleR * rvolume) >> 8;
sampleR += samples[currentSample];
@ -122,8 +128,8 @@ unsigned int Mixer::MixerFifo::Mix(short* samples, unsigned int numSamples,
// Padding
short s[2];
s[0] = Common::swap16(m_buffer[(indexR - 1) & INDEX_MASK]);
s[1] = Common::swap16(m_buffer[(indexR - 2) & INDEX_MASK]);
s[0] = read_buffer((indexR - 1) & INDEX_MASK);
s[1] = read_buffer((indexR - 2) & INDEX_MASK);
s[0] = (s[0] * rvolume) >> 8;
s[1] = (s[1] * lvolume) >> 8;
for (; currentSample < numSamples * 2; currentSample += 2)
@ -158,6 +164,8 @@ unsigned int Mixer::Mix(short* samples, unsigned int num_samples)
m_dma_mixer.Mix(m_scratch_buffer.data(), available_samples, false);
m_streaming_mixer.Mix(m_scratch_buffer.data(), available_samples, false);
m_wiimote_speaker_mixer.Mix(m_scratch_buffer.data(), available_samples, false);
for (auto& mixer : m_gba_mixers)
mixer.Mix(m_scratch_buffer.data(), available_samples, false);
if (!m_is_stretching)
{
@ -172,6 +180,8 @@ unsigned int Mixer::Mix(short* samples, unsigned int num_samples)
m_dma_mixer.Mix(samples, num_samples, true);
m_streaming_mixer.Mix(samples, num_samples, true);
m_wiimote_speaker_mixer.Mix(samples, num_samples, true);
for (auto& mixer : m_gba_mixers)
mixer.Mix(samples, num_samples, true);
m_is_stretching = false;
}
@ -258,14 +268,19 @@ void Mixer::PushWiimoteSpeakerSamples(const short* samples, unsigned int num_sam
for (unsigned int i = 0; i < num_samples; ++i)
{
samples_stereo[i * 2] = Common::swap16(samples[i]);
samples_stereo[i * 2 + 1] = Common::swap16(samples[i]);
samples_stereo[i * 2] = samples[i];
samples_stereo[i * 2 + 1] = samples[i];
}
m_wiimote_speaker_mixer.PushSamples(samples_stereo, num_samples);
}
}
void Mixer::PushGBASamples(int device_number, const short* samples, unsigned int num_samples)
{
m_gba_mixers[device_number].PushSamples(samples, num_samples);
}
void Mixer::SetDMAInputSampleRate(unsigned int rate)
{
m_dma_mixer.SetInputSampleRate(rate);
@ -276,6 +291,11 @@ void Mixer::SetStreamInputSampleRate(unsigned int rate)
m_streaming_mixer.SetInputSampleRate(rate);
}
void Mixer::SetGBAInputSampleRates(int device_number, unsigned int rate)
{
m_gba_mixers[device_number].SetInputSampleRate(rate);
}
void Mixer::SetStreamingVolume(unsigned int lvolume, unsigned int rvolume)
{
m_streaming_mixer.SetVolume(lvolume, rvolume);
@ -286,6 +306,11 @@ void Mixer::SetWiimoteSpeakerVolume(unsigned int lvolume, unsigned int rvolume)
m_wiimote_speaker_mixer.SetVolume(lvolume, rvolume);
}
void Mixer::SetGBAVolume(int device_number, unsigned int lvolume, unsigned int rvolume)
{
m_gba_mixers[device_number].SetVolume(lvolume, rvolume);
}
void Mixer::StartLogDTKAudio(const std::string& filename)
{
if (!m_log_dtk_audio)

18
Source/Core/AudioCommon/Mixer.h
View File

@ -30,11 +30,17 @@ public:
void PushStreamingSamples(const short* samples, unsigned int num_samples);
void PushWiimoteSpeakerSamples(const short* samples, unsigned int num_samples,
unsigned int sample_rate);
void PushGBASamples(int device_number, const short* samples, unsigned int num_samples);
unsigned int GetSampleRate() const { return m_sampleRate; }
void SetDMAInputSampleRate(unsigned int rate);
void SetStreamInputSampleRate(unsigned int rate);
void SetGBAInputSampleRates(int device_number, unsigned int rate);
void SetStreamingVolume(unsigned int lvolume, unsigned int rvolume);
void SetWiimoteSpeakerVolume(unsigned int lvolume, unsigned int rvolume);
void SetGBAVolume(int device_number, unsigned int lvolume, unsigned int rvolume);
void StartLogDTKAudio(const std::string& filename);
void StopLogDTKAudio();
@ -57,7 +63,8 @@ private:
class MixerFifo final
{
public:
MixerFifo(Mixer* mixer, unsigned sample_rate) : m_mixer(mixer), m_input_sample_rate(sample_rate)
MixerFifo(Mixer* mixer, unsigned sample_rate, bool little_endian)
: m_mixer(mixer), m_input_sample_rate(sample_rate), m_little_endian(little_endian)
{
}
void DoState(PointerWrap& p);
@ -71,6 +78,7 @@ private:
private:
Mixer* m_mixer;
unsigned m_input_sample_rate;
bool m_little_endian;
std::array<short, MAX_SAMPLES * 2> m_buffer{};
std::atomic<u32> m_indexW{0};
std::atomic<u32> m_indexR{0};
@ -81,9 +89,11 @@ private:
u32 m_frac = 0;
};
MixerFifo m_dma_mixer{this, 32000};
MixerFifo m_streaming_mixer{this, 48000};
MixerFifo m_wiimote_speaker_mixer{this, 3000};
MixerFifo m_dma_mixer{this, 32000, false};
MixerFifo m_streaming_mixer{this, 48000, false};
MixerFifo m_wiimote_speaker_mixer{this, 3000, true};
std::array<MixerFifo, 4> m_gba_mixers{MixerFifo{this, 48000, true}, MixerFifo{this, 48000, true},
MixerFifo{this, 48000, true}, MixerFifo{this, 48000, true}};
unsigned int m_sampleRate;
bool m_is_stretching = false;