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b00ef39c1c
The main problem was that the volume of the mixer wasn't savestated. The volume is typically 0 at the beginning of a game, so loading a savestate at the beginning of a game would lead to silent DTK audio. I also added savestating to StreamADPCM.cpp.
373 lines
11 KiB
C++
373 lines
11 KiB
C++
// Copyright 2008 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#include "AudioCommon/Mixer.h"
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#include <cmath>
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#include <cstring>
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#include "AudioCommon/DPL2Decoder.h"
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#include "Common/ChunkFile.h"
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#include "Common/CommonTypes.h"
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#include "Common/Logging/Log.h"
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#include "Common/MathUtil.h"
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#include "Common/Swap.h"
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#include "Core/ConfigManager.h"
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Mixer::Mixer(unsigned int BackendSampleRate)
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: m_sampleRate(BackendSampleRate), m_stretcher(BackendSampleRate)
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{
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INFO_LOG(AUDIO_INTERFACE, "Mixer is initialized");
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DPL2Reset();
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}
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Mixer::~Mixer()
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{
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}
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void Mixer::DoState(PointerWrap& p)
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{
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m_dma_mixer.DoState(p);
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m_streaming_mixer.DoState(p);
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m_wiimote_speaker_mixer.DoState(p);
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}
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// Executed from sound stream thread
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unsigned int Mixer::MixerFifo::Mix(short* samples, unsigned int numSamples,
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bool consider_framelimit)
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{
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unsigned int currentSample = 0;
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// Cache access in non-volatile variable
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// This is the only function changing the read value, so it's safe to
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// cache it locally although it's written here.
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// The writing pointer will be modified outside, but it will only increase,
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// so we will just ignore new written data while interpolating.
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// Without this cache, the compiler wouldn't be allowed to optimize the
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// interpolation loop.
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u32 indexR = m_indexR.load();
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u32 indexW = m_indexW.load();
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// render numleft sample pairs to samples[]
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// advance indexR with sample position
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// remember fractional offset
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float emulationspeed = SConfig::GetInstance().m_EmulationSpeed;
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float aid_sample_rate = static_cast<float>(m_input_sample_rate);
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if (consider_framelimit && emulationspeed > 0.0f)
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{
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float numLeft = static_cast<float>(((indexW - indexR) & INDEX_MASK) / 2);
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u32 low_waterwark = m_input_sample_rate * SConfig::GetInstance().iTimingVariance / 1000;
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low_waterwark = std::min(low_waterwark, MAX_SAMPLES / 2);
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m_numLeftI = (numLeft + m_numLeftI * (CONTROL_AVG - 1)) / CONTROL_AVG;
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float offset = (m_numLeftI - low_waterwark) * CONTROL_FACTOR;
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if (offset > MAX_FREQ_SHIFT)
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offset = MAX_FREQ_SHIFT;
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if (offset < -MAX_FREQ_SHIFT)
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offset = -MAX_FREQ_SHIFT;
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aid_sample_rate = (aid_sample_rate + offset) * emulationspeed;
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}
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const u32 ratio = (u32)(65536.0f * aid_sample_rate / (float)m_mixer->m_sampleRate);
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s32 lvolume = m_LVolume.load();
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s32 rvolume = m_RVolume.load();
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// TODO: consider a higher-quality resampling algorithm.
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for (; currentSample < numSamples * 2 && ((indexW - indexR) & INDEX_MASK) > 2; currentSample += 2)
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{
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u32 indexR2 = indexR + 2; // next sample
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s16 l1 = Common::swap16(m_buffer[indexR & INDEX_MASK]); // current
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s16 l2 = Common::swap16(m_buffer[indexR2 & INDEX_MASK]); // next
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int sampleL = ((l1 << 16) + (l2 - l1) * (u16)m_frac) >> 16;
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sampleL = (sampleL * lvolume) >> 8;
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sampleL += samples[currentSample + 1];
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samples[currentSample + 1] = MathUtil::Clamp(sampleL, -32767, 32767);
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s16 r1 = Common::swap16(m_buffer[(indexR + 1) & INDEX_MASK]); // current
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s16 r2 = Common::swap16(m_buffer[(indexR2 + 1) & INDEX_MASK]); // next
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int sampleR = ((r1 << 16) + (r2 - r1) * (u16)m_frac) >> 16;
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sampleR = (sampleR * rvolume) >> 8;
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sampleR += samples[currentSample];
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samples[currentSample] = MathUtil::Clamp(sampleR, -32767, 32767);
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m_frac += ratio;
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indexR += 2 * (u16)(m_frac >> 16);
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m_frac &= 0xffff;
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}
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// Actual number of samples written to the buffer without padding.
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unsigned int actual_sample_count = currentSample / 2;
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// Padding
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short s[2];
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s[0] = Common::swap16(m_buffer[(indexR - 1) & INDEX_MASK]);
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s[1] = Common::swap16(m_buffer[(indexR - 2) & INDEX_MASK]);
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s[0] = (s[0] * rvolume) >> 8;
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s[1] = (s[1] * lvolume) >> 8;
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for (; currentSample < numSamples * 2; currentSample += 2)
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{
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int sampleR = MathUtil::Clamp(s[0] + samples[currentSample + 0], -32767, 32767);
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int sampleL = MathUtil::Clamp(s[1] + samples[currentSample + 1], -32767, 32767);
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samples[currentSample + 0] = sampleR;
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samples[currentSample + 1] = sampleL;
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}
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// Flush cached variable
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m_indexR.store(indexR);
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return actual_sample_count;
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}
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unsigned int Mixer::Mix(short* samples, unsigned int num_samples)
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{
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if (!samples)
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return 0;
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memset(samples, 0, num_samples * 2 * sizeof(short));
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if (SConfig::GetInstance().m_audio_stretch)
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{
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unsigned int available_samples =
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std::min(m_dma_mixer.AvailableSamples(), m_streaming_mixer.AvailableSamples());
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m_scratch_buffer.fill(0);
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m_dma_mixer.Mix(m_scratch_buffer.data(), available_samples, false);
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m_streaming_mixer.Mix(m_scratch_buffer.data(), available_samples, false);
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m_wiimote_speaker_mixer.Mix(m_scratch_buffer.data(), available_samples, false);
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if (!m_is_stretching)
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{
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m_stretcher.Clear();
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m_is_stretching = true;
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}
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m_stretcher.ProcessSamples(m_scratch_buffer.data(), available_samples, num_samples);
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m_stretcher.GetStretchedSamples(samples, num_samples);
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}
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else
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{
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m_dma_mixer.Mix(samples, num_samples, true);
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m_streaming_mixer.Mix(samples, num_samples, true);
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m_wiimote_speaker_mixer.Mix(samples, num_samples, true);
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m_is_stretching = false;
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}
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return num_samples;
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}
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unsigned int Mixer::MixSurround(float* samples, unsigned int num_samples)
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{
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if (!num_samples)
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return 0;
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memset(samples, 0, num_samples * 6 * sizeof(float));
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// Mix() may also use m_scratch_buffer internally, but is safe because it alternates reads and
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// writes.
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unsigned int available_samples = Mix(m_scratch_buffer.data(), num_samples);
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for (size_t i = 0; i < static_cast<size_t>(available_samples) * 2; ++i)
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{
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m_float_conversion_buffer[i] =
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m_scratch_buffer[i] / static_cast<float>(std::numeric_limits<short>::max());
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}
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DPL2Decode(m_float_conversion_buffer.data(), available_samples, samples);
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return available_samples;
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}
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void Mixer::MixerFifo::PushSamples(const short* samples, unsigned int num_samples)
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{
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// Cache access in non-volatile variable
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// indexR isn't allowed to cache in the audio throttling loop as it
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// needs to get updates to not deadlock.
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u32 indexW = m_indexW.load();
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// Check if we have enough free space
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// indexW == m_indexR results in empty buffer, so indexR must always be smaller than indexW
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if (num_samples * 2 + ((indexW - m_indexR.load()) & INDEX_MASK) >= MAX_SAMPLES * 2)
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return;
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// AyuanX: Actual re-sampling work has been moved to sound thread
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// to alleviate the workload on main thread
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// and we simply store raw data here to make fast mem copy
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int over_bytes = num_samples * 4 - (MAX_SAMPLES * 2 - (indexW & INDEX_MASK)) * sizeof(short);
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if (over_bytes > 0)
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{
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memcpy(&m_buffer[indexW & INDEX_MASK], samples, num_samples * 4 - over_bytes);
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memcpy(&m_buffer[0], samples + (num_samples * 4 - over_bytes) / sizeof(short), over_bytes);
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}
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else
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{
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memcpy(&m_buffer[indexW & INDEX_MASK], samples, num_samples * 4);
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}
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m_indexW.fetch_add(num_samples * 2);
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}
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void Mixer::PushSamples(const short* samples, unsigned int num_samples)
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{
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m_dma_mixer.PushSamples(samples, num_samples);
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int sample_rate = m_dma_mixer.GetInputSampleRate();
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if (m_log_dsp_audio)
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m_wave_writer_dsp.AddStereoSamplesBE(samples, num_samples, sample_rate);
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}
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void Mixer::PushStreamingSamples(const short* samples, unsigned int num_samples)
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{
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m_streaming_mixer.PushSamples(samples, num_samples);
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int sample_rate = m_streaming_mixer.GetInputSampleRate();
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if (m_log_dtk_audio)
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m_wave_writer_dtk.AddStereoSamplesBE(samples, num_samples, sample_rate);
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}
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void Mixer::PushWiimoteSpeakerSamples(const short* samples, unsigned int num_samples,
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unsigned int sample_rate)
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{
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short samples_stereo[MAX_SAMPLES * 2];
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if (num_samples < MAX_SAMPLES)
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{
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m_wiimote_speaker_mixer.SetInputSampleRate(sample_rate);
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for (unsigned int i = 0; i < num_samples; ++i)
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{
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samples_stereo[i * 2] = Common::swap16(samples[i]);
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samples_stereo[i * 2 + 1] = Common::swap16(samples[i]);
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}
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m_wiimote_speaker_mixer.PushSamples(samples_stereo, num_samples);
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}
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}
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void Mixer::SetDMAInputSampleRate(unsigned int rate)
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{
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m_dma_mixer.SetInputSampleRate(rate);
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}
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void Mixer::SetStreamInputSampleRate(unsigned int rate)
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{
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m_streaming_mixer.SetInputSampleRate(rate);
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}
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void Mixer::SetStreamingVolume(unsigned int lvolume, unsigned int rvolume)
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{
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m_streaming_mixer.SetVolume(lvolume, rvolume);
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}
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void Mixer::SetWiimoteSpeakerVolume(unsigned int lvolume, unsigned int rvolume)
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{
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m_wiimote_speaker_mixer.SetVolume(lvolume, rvolume);
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}
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void Mixer::StartLogDTKAudio(const std::string& filename)
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{
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if (!m_log_dtk_audio)
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{
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bool success = m_wave_writer_dtk.Start(filename, m_streaming_mixer.GetInputSampleRate());
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if (success)
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{
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m_log_dtk_audio = true;
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m_wave_writer_dtk.SetSkipSilence(false);
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NOTICE_LOG(AUDIO, "Starting DTK Audio logging");
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}
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else
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{
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m_wave_writer_dtk.Stop();
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NOTICE_LOG(AUDIO, "Unable to start DTK Audio logging");
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}
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}
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else
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{
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WARN_LOG(AUDIO, "DTK Audio logging has already been started");
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}
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}
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void Mixer::StopLogDTKAudio()
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{
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if (m_log_dtk_audio)
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{
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m_log_dtk_audio = false;
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m_wave_writer_dtk.Stop();
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NOTICE_LOG(AUDIO, "Stopping DTK Audio logging");
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}
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else
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{
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WARN_LOG(AUDIO, "DTK Audio logging has already been stopped");
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}
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}
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void Mixer::StartLogDSPAudio(const std::string& filename)
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{
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if (!m_log_dsp_audio)
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{
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bool success = m_wave_writer_dsp.Start(filename, m_dma_mixer.GetInputSampleRate());
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if (success)
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{
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m_log_dsp_audio = true;
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m_wave_writer_dsp.SetSkipSilence(false);
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NOTICE_LOG(AUDIO, "Starting DSP Audio logging");
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}
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else
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{
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m_wave_writer_dsp.Stop();
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NOTICE_LOG(AUDIO, "Unable to start DSP Audio logging");
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}
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}
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else
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{
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WARN_LOG(AUDIO, "DSP Audio logging has already been started");
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}
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}
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void Mixer::StopLogDSPAudio()
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{
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if (m_log_dsp_audio)
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{
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m_log_dsp_audio = false;
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m_wave_writer_dsp.Stop();
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NOTICE_LOG(AUDIO, "Stopping DSP Audio logging");
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}
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else
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{
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WARN_LOG(AUDIO, "DSP Audio logging has already been stopped");
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}
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}
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void Mixer::MixerFifo::DoState(PointerWrap& p)
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{
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p.Do(m_input_sample_rate);
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p.Do(m_LVolume);
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p.Do(m_RVolume);
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}
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void Mixer::MixerFifo::SetInputSampleRate(unsigned int rate)
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{
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m_input_sample_rate = rate;
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}
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unsigned int Mixer::MixerFifo::GetInputSampleRate() const
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{
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return m_input_sample_rate;
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}
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void Mixer::MixerFifo::SetVolume(unsigned int lvolume, unsigned int rvolume)
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{
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m_LVolume.store(lvolume + (lvolume >> 7));
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m_RVolume.store(rvolume + (rvolume >> 7));
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}
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unsigned int Mixer::MixerFifo::AvailableSamples() const
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{
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unsigned int samples_in_fifo = ((m_indexW.load() - m_indexR.load()) & INDEX_MASK) / 2;
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if (samples_in_fifo <= 1)
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return 0; // Mixer::MixerFifo::Mix always keeps one sample in the buffer.
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return (samples_in_fifo - 1) * m_mixer->m_sampleRate / m_input_sample_rate;
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}
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