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Reset audio buffer when you finish fast-forwarding 

Fixes excessive audio being buffered and audio going sharp after
fast-forwarding.
This commit is contained in:
nyanpasu64 2023-07-08 15:00:10 -07:00
parent 0472960f1a
commit dde6a616ca
2 changed files with 36 additions and 14 deletions
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47
Source/Core/AudioCommon/Mixer.cpp
View File

@ -14,6 +14,7 @@
#include "Common/Swap.h"
#include "Core/Config/MainSettings.h"
#include "Core/ConfigManager.h"
#include "Core/Core.h"
#include "VideoCommon/PerformanceMetrics.h"
static u32 DPL2QualityToFrameBlockSize(AudioCommon::DPL2Quality quality)
@ -60,10 +61,8 @@ void Mixer::DoState(PointerWrap& p)
// Executed from sound stream thread
unsigned int Mixer::MixerFifo::Mix(short* samples, unsigned int numSamples,
bool consider_framelimit, float emulationspeed,
int timing_variance)
bool should_resync, int timing_variance)
{
unsigned int currentSample = 0;
// Cache access in non-volatile variable
// This is the only function changing the read value, so it's safe to
// cache it locally although it's written here.
@ -88,6 +87,15 @@ unsigned int Mixer::MixerFifo::Mix(short* samples, unsigned int numSamples,
(static_cast<u64>(m_input_sample_rate_divisor) * 1000);
low_watermark = std::min(low_watermark, MAX_SAMPLES / 2);
// When the writer exits fast-forward, throw away extra audio beyond low_watermark.
if (should_resync && numLeft > low_watermark)
{
numLeft = m_numLeftI = low_watermark;
indexR = (indexW - 2 * low_watermark) & INDEX_MASK;
// Verify that numLeft is correct (using its initial formula).
ASSERT(numLeft == static_cast<float>(((indexW - indexR) & INDEX_MASK) / 2));
}
m_numLeftI = (numLeft + m_numLeftI * (CONTROL_AVG - 1)) / CONTROL_AVG;
float offset = (m_numLeftI - low_watermark) * CONTROL_FACTOR;
if (offset > MAX_FREQ_SHIFT)
@ -107,6 +115,7 @@ unsigned int Mixer::MixerFifo::Mix(short* samples, unsigned int numSamples,
return m_little_endian ? m_buffer[index] : Common::swap16(m_buffer[index]);
};
unsigned int currentSample = 0;
// TODO: consider a higher-quality resampling algorithm.
for (; currentSample < numSamples * 2 && ((indexW - indexR) & INDEX_MASK) > 2; currentSample += 2)
{
@ -178,17 +187,17 @@ unsigned int Mixer::Mix(short* samples, unsigned int num_samples)
m_scratch_buffer.fill(0);
m_dma_mixer.Mix(m_scratch_buffer.data(), available_samples, false, emulation_speed,
m_dma_mixer.Mix(m_scratch_buffer.data(), available_samples, false, emulation_speed, false,
timing_variance);
m_streaming_mixer.Mix(m_scratch_buffer.data(), available_samples, false, emulation_speed,
m_streaming_mixer.Mix(m_scratch_buffer.data(), available_samples, false, emulation_speed, false,
timing_variance);
m_wiimote_speaker_mixer.Mix(m_scratch_buffer.data(), available_samples, false, emulation_speed,
timing_variance);
false, timing_variance);
m_skylander_portal_mixer.Mix(m_scratch_buffer.data(), available_samples, false, emulation_speed,
timing_variance);
false, timing_variance);
for (auto& mixer : m_gba_mixers)
{
mixer.Mix(m_scratch_buffer.data(), available_samples, false, emulation_speed,
mixer.Mix(m_scratch_buffer.data(), available_samples, false, emulation_speed, false,
timing_variance);
}
@ -202,12 +211,24 @@ unsigned int Mixer::Mix(short* samples, unsigned int num_samples)
}
else
{
m_dma_mixer.Mix(samples, num_samples, true, emulation_speed, timing_variance);
m_streaming_mixer.Mix(samples, num_samples, true, emulation_speed, timing_variance);
m_wiimote_speaker_mixer.Mix(samples, num_samples, true, emulation_speed, timing_variance);
m_skylander_portal_mixer.Mix(samples, num_samples, true, emulation_speed, timing_variance);
const bool is_fast_forwarding = Core::GetIsThrottlerTempDisabled();
const bool should_resync = m_was_fast_forwarding && !is_fast_forwarding;
m_was_fast_forwarding = is_fast_forwarding;
if (should_resync)
{
INFO_LOG_FMT(AUDIO, "Resyncing after fast forward");
}
m_dma_mixer.Mix(samples, num_samples, true, emulation_speed, should_resync, timing_variance);
m_streaming_mixer.Mix(samples, num_samples, true, emulation_speed, should_resync,
timing_variance);
m_wiimote_speaker_mixer.Mix(samples, num_samples, true, emulation_speed, should_resync,
timing_variance);
m_skylander_portal_mixer.Mix(samples, num_samples, true, emulation_speed, should_resync,
timing_variance);
for (auto& mixer : m_gba_mixers)
mixer.Mix(samples, num_samples, true, emulation_speed, timing_variance);
mixer.Mix(samples, num_samples, true, emulation_speed, should_resync, timing_variance);
m_is_stretching = false;
}

3
Source/Core/AudioCommon/Mixer.h
View File

@ -72,7 +72,7 @@ private:
void DoState(PointerWrap& p);
void PushSamples(const short* samples, unsigned int num_samples);
unsigned int Mix(short* samples, unsigned int numSamples, bool consider_framelimit,
float emulationspeed, int timing_variance);
float emulationspeed, bool should_resync, int timing_variance);
void SetInputSampleRateDivisor(unsigned int rate_divisor);
unsigned int GetInputSampleRateDivisor() const;
void SetVolume(unsigned int lvolume, unsigned int rvolume);
@ -119,6 +119,7 @@ private:
float m_config_emulation_speed;
int m_config_timing_variance;
bool m_config_audio_stretch;
bool m_was_fast_forwarding = false;
size_t m_config_changed_callback_id;
};