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WaveOut 16x512 buffer instead of 8x1024

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Both come out to the same amount of target latency (as does 32x256, etc) however RageSoundDriver.h defines samples_per_block as 512, so this aims to have chunksize_frames equal 512.

It also defines a constant to define the quantity of buffers so it's not hardcoded in various places and puts the variables in an anonymous namespace.
This commit is contained in:
sukibaby
2024-08-23 06:53:59 -07:00
committed by teejusb
parent 49393443da
commit c2cd37fdd2
2 changed files with 22 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/arch/Sound/RageSoundDriver_WaveOut.cpp
+20 -19
View File
@@ -19,14 +19,15 @@
REGISTER_SOUND_DRIVER_CLASS( WaveOut );
const int channels = 2;
const int bytes_per_frame = channels*2; /* 16-bit */
const int buffersize_frames = 1024*8; /* in frames */
const int buffersize = buffersize_frames * bytes_per_frame; /* in bytes */
const int num_chunks = 8;
const int chunksize_frames = buffersize_frames / num_chunks;
const int chunksize = buffersize / num_chunks; /* in bytes */
namespace {
const int CHANNELS = 2;
const int BYTES_PER_FRAME = CHANNELS * 2; // 16 bit
const int BUFFERSIZE_FRAMES = 512 * RageSoundDriver_WaveOut::NUM_BUFFERS; // in frames
const int BUFFERSIZE = BUFFERSIZE_FRAMES * BYTES_PER_FRAME; // in bytes
const int NUM_CHUNKS = RageSoundDriver_WaveOut::NUM_BUFFERS;
const int CHUNKSIZE_FRAMES = BUFFERSIZE_FRAMES / NUM_CHUNKS; // in frames
const int CHUNKSIZE = CHUNKSIZE_FRAMES * BYTES_PER_FRAME; // in bytes
} // namespace
static RString wo_ssprintf( MMRESULT err, const char *szFmt, ...)
{
@@ -67,14 +68,14 @@ bool RageSoundDriver_WaveOut::GetData()
{
/* Look for a free buffer. */
int b;
for( b = 0; b < num_chunks; ++b )
for( b = 0; b < NUM_CHUNKS; ++b )
if( m_aBuffers[b].dwFlags & WHDR_DONE )
break;
if( b == num_chunks )
if( b == NUM_CHUNKS )
return false;
/* Call the callback. */
this->Mix( (std::int16_t *) m_aBuffers[b].lpData, chunksize_frames, m_iLastCursorPos, GetPosition() );
this->Mix( (std::int16_t *) m_aBuffers[b].lpData, CHUNKSIZE_FRAMES, m_iLastCursorPos, GetPosition() );
MMRESULT ret = waveOutWrite( m_hWaveOut, &m_aBuffers[b], sizeof(m_aBuffers[b]) );
if( ret != MMSYSERR_NOERROR )
@@ -87,7 +88,7 @@ bool RageSoundDriver_WaveOut::GetData()
}
/* Increment m_iLastCursorPos. */
m_iLastCursorPos += chunksize_frames;
m_iLastCursorPos += CHUNKSIZE_FRAMES;
return true;
}
@@ -128,7 +129,7 @@ RString RageSoundDriver_WaveOut::Init()
WAVEFORMATEX fmt;
fmt.wFormatTag = WAVE_FORMAT_PCM;
fmt.nChannels = channels;
fmt.nChannels = CHANNELS;
fmt.cbSize = 0;
fmt.nSamplesPerSec = m_iSampleRate;
fmt.wBitsPerSample = 16;
@@ -161,10 +162,10 @@ RString RageSoundDriver_WaveOut::Init()
ZERO( m_aBuffers );
for(int b = 0; b < num_chunks; ++b)
for(int b = 0; b < NUM_CHUNKS; ++b)
{
m_aBuffers[b].dwBufferLength = chunksize;
m_aBuffers[b].lpData = new char[chunksize];
m_aBuffers[b].dwBufferLength = CHUNKSIZE;
m_aBuffers[b].lpData = new char[CHUNKSIZE];
ret = waveOutPrepareHeader( m_hWaveOut, &m_aBuffers[b], sizeof(m_aBuffers[b]) );
if( ret != MMSYSERR_NOERROR )
return wo_ssprintf( ret, "waveOutPrepareHeader failed" );
@@ -175,7 +176,7 @@ RString RageSoundDriver_WaveOut::Init()
/* We have a very large writeahead; make sure we have a large enough decode
* buffer to recover cleanly from underruns. */
SetDecodeBufferSize( buffersize_frames * 3/2 );
SetDecodeBufferSize( BUFFERSIZE_FRAMES * 3/2 );
StartDecodeThread();
MixingThread.SetName( "Mixer thread" );
@@ -199,7 +200,7 @@ RageSoundDriver_WaveOut::~RageSoundDriver_WaveOut()
if( m_hWaveOut != nullptr )
{
for( int b = 0; b < num_chunks && m_aBuffers[b].lpData != nullptr; ++b )
for( int b = 0; b < NUM_CHUNKS && m_aBuffers[b].lpData != nullptr; ++b )
{
waveOutUnprepareHeader( m_hWaveOut, &m_aBuffers[b], sizeof(m_aBuffers[b]) );
delete [] m_aBuffers[b].lpData;
@@ -215,7 +216,7 @@ float RageSoundDriver_WaveOut::GetPlayLatency() const
{
/* If we have a 1000-byte buffer, and we fill 100 bytes at a time, we
* almost always have between 900 and 1000 bytes filled; on average, 950. */
return (buffersize_frames - chunksize_frames/2) * (1.0f / m_iSampleRate);
return (BUFFERSIZE_FRAMES - CHUNKSIZE_FRAMES/2) * (1.0f / m_iSampleRate);
}
/*
src/arch/Sound/RageSoundDriver_WaveOut.h
+2 -2
View File
@@ -18,7 +18,7 @@ public:
std::int64_t GetPosition() const;
float GetPlayLatency() const;
int GetSampleRate() const { return m_iSampleRate; }
static const int NUM_BUFFERS = 32;
private:
static int MixerThread_start( void *p );
void MixerThread();
@@ -28,7 +28,7 @@ private:
HWAVEOUT m_hWaveOut;
HANDLE m_hSoundEvent;
WAVEHDR m_aBuffers[8];
WAVEHDR m_aBuffers[NUM_BUFFERS];
int m_iSampleRate;
bool m_bShutdown;
int m_iLastCursorPos;