Directly use sound sample rate instead of "quality"

git-svn-id: https://svn.code.sf.net/p/vbam/code/trunk@827 a31d4220-a93d-0410-bf67-fe4944624d44

src/Sound.cpp

@@ -41,7 +41,7 @@ extern bool stopState;      // TODO: silence sound when true
 int const SOUND_CLOCK_TICKS_ = 167772; // 1/100 second
 
 static u16   soundFinalWave [1470];
-int   soundQuality       = 1;
+long  soundSampleRate    = 44100;
 bool  soundInterpolation = true;
 bool  soundPaused        = true;
 float soundFiltering     = 0.5f;
@@ -448,8 +448,7 @@ static void remake_stereo_buffer()
 	stereo_buffer = 0;
 
 	stereo_buffer = new Stereo_Buffer; // TODO: handle out of memory
-	long const sample_rate = 44100 / soundQuality;
-	stereo_buffer->set_sample_rate( sample_rate ); // TODO: handle out of memory
+	stereo_buffer->set_sample_rate( soundSampleRate ); // TODO: handle out of memory
 	stereo_buffer->clock_rate( gb_apu->clock_rate );
 
 	// PCM
@@ -534,7 +533,7 @@ bool soundInit()
 	if ( !soundDriver )
 		return false;
 
-	if (!soundDriver->init(soundQuality))
+	if (!soundDriver->init(soundSampleRate))
 		return false;
 
 	soundPaused = true;
@@ -543,22 +542,24 @@ bool soundInit()
 
 int soundGetQuality()
 {
-	return soundQuality;
+	return 44100 / soundSampleRate;
 }
 
 void soundSetQuality(int quality)
 {
-	if ( soundQuality != quality )
+	long newSampleRate = 44100 / quality;
+
+	if ( soundSampleRate != newSampleRate )
 	{
 		if ( systemCanChangeSoundQuality() )
 		{
 			soundShutdown();
-			soundQuality      = quality;
+			soundSampleRate      = newSampleRate;
 			soundInit();
 		}
 		else
 		{
-			soundQuality      = quality;
+			soundSampleRate      = newSampleRate;
 		}
 
 		remake_stereo_buffer();

src/common/SoundDriver.h

@@ -33,9 +33,9 @@ public:
 
 	/**
 	 * Initialize the sound driver.
-	 * @param quality Sound frequency : 1 => 44100 Hz, 2 => 22050 Hz, 4 => 11025 Hz
+	 * @param sampleRate In Hertz
 	 */
-	virtual bool init(int quality) = 0;
+	virtual bool init(long sampleRate) = 0;
 
 	/**
 	 * Tell the driver that the sound stream has paused

src/common/SoundSDL.cpp

@@ -94,25 +94,13 @@ void SoundSDL::write(const u16 * finalWave, int length)
   SDL_mutexV(_mutex);
 }
 
-bool SoundSDL::init(int quality)
+bool SoundSDL::init(long sampleRate)
 {
   SDL_AudioSpec audio;
 
-  switch(quality) {
-  case 1:
-    audio.freq = 44100;
-    _bufferLen = 1470*2;
-    break;
-  case 2:
-    audio.freq = 22050;
-    _bufferLen = 736*2;
-    break;
-  case 4:
-    audio.freq = 11025;
-    _bufferLen = 368*2;
-    break;
-  }
+  _bufferLen = sampleRate / 15;
 
+  audio.freq = sampleRate;
   audio.format = AUDIO_S16SYS;
   audio.channels = 2;
   audio.samples = 1024;

src/common/SoundSDL.h

@@ -25,7 +25,7 @@ class SoundSDL: public SoundDriver
 public:
 	virtual ~SoundSDL();
 
-	virtual bool init(int quality);
+	virtual bool init(long sampleRate);
 	virtual void pause();
 	virtual void reset();
 	virtual void resume();

src/dmg/gbSound.cpp

@@ -9,6 +9,7 @@
 #include "gb_apu/Effects_Buffer.h"
 
 extern int gbHardware;
+extern long soundSampleRate; // current sound quality
 
 gb_effects_config_t gb_effects_config = { false, 0.20f, 0.15f, false };
 
@@ -125,7 +126,7 @@ static void remake_stereo_buffer()
 	stereo_buffer = 0;
 
 	stereo_buffer = new Simple_Effects_Buffer; // TODO: handle out of memory
-	if ( stereo_buffer->set_sample_rate( 44100 / soundQuality ) ) { } // TODO: handle out of memory
+	if ( stereo_buffer->set_sample_rate( soundSampleRate ) ) { } // TODO: handle out of memory
 	stereo_buffer->clock_rate( gb_apu->clock_rate );
 
 	// APU
@@ -217,17 +218,19 @@ void gbSoundReset()
 
 void gbSoundSetQuality(int quality)
 {
-	if ( soundQuality != quality )
+	long newSampleRate = 44100 / quality;
+
+	if ( soundSampleRate != newSampleRate )
 	{
 		if ( systemCanChangeSoundQuality() )
 		{
 			soundShutdown();
-			soundQuality      = quality;
+			soundSampleRate      = newSampleRate;
 			soundInit();
 		}
 		else
 		{
-			soundQuality      = quality;
+			soundSampleRate      = newSampleRate;
 		}
 
 		remake_stereo_buffer();

src/dmg/gbSound.h

@@ -9,7 +9,6 @@
 
 // Sets sample rate to 44100 / quality
 void gbSoundSetQuality( int quality );
-extern int soundQuality; // current sound quality
 
 // Manages declicking mode. When enabled, clicks are reduced. Note that clicks
 // are normal for GB and GBC sound hardware.

src/sdl/SDL.cpp

@@ -721,7 +721,7 @@ void sdlReadPreferences(FILE *f)
     } else if(!strcmp(key, "captureFormat")) {
       captureFormat = sdlFromHex(value);
     } else if(!strcmp(key, "soundQuality")) {
-      soundQuality = sdlFromHex(value);
+      int soundQuality = sdlFromHex(value);
       switch(soundQuality) {
       case 1:
       case 2:
@@ -733,6 +733,7 @@ void sdlReadPreferences(FILE *f)
         soundQuality = 2;
         break;
       }
+      soundSetQuality(soundQuality);
     } else if(!strcmp(key, "soundEnable")) {
       int res = sdlFromHex(value) & 0x30f;
       soundSetEnable(res);

src/win32/DirectSound.cpp

@@ -34,7 +34,7 @@ public:
 	DirectSound();
 	virtual ~DirectSound();
 
-	bool init(int quality);   // initialize the primary and secondary sound buffer
+	bool init(long sampleRate);   // initialize the primary and secondary sound buffer
 	void pause();  // pause the secondary sound buffer
 	void reset();  // stop and reset the secondary sound buffer
 	void resume(); // resume the secondary sound buffer
@@ -85,7 +85,7 @@ DirectSound::~DirectSound()
 }
 
 
-bool DirectSound::init(int quality)
+bool DirectSound::init(long sampleRate)
 {
 	HRESULT hr;
 	DWORD freq;
@@ -123,7 +123,7 @@ bool DirectSound::init(int quality)
 		return false;
 	}
 
-	freq = 44100 / quality;
+	freq = sampleRate;
 	// calculate the number of samples per frame first
 	// then multiply it with the size of a sample frame (16 bit * stereo)
 	soundBufferLen = ( freq / 60 ) * 4;

src/win32/OpenAL.cpp

@@ -37,7 +37,7 @@ public:
 	OpenAL();
 	virtual ~OpenAL();
 
-	bool init(int quality);   // initialize the sound buffer queue
+	bool init(long sampleRate);   // initialize the sound buffer queue
 	void pause();  // pause the secondary sound buffer
 	void reset();  // stop and reset the secondary sound buffer
 	void resume(); // play/resume the secondary sound buffer
@@ -145,7 +145,7 @@ void OpenAL::debugState()
 #endif
 
 
-bool OpenAL::init(int quality)
+bool OpenAL::init(long sampleRate)
 {
 	winlog( "OpenAL::init\n" );
 	assert( initialized == false );
@@ -174,7 +174,7 @@ bool OpenAL::init(int quality)
 	ALFunction.alGenSources( 1, &source );
 	ASSERT_SUCCESS;
 
-	freq = 44100 / quality;
+	freq = sampleRate;
 
 	// calculate the number of samples per frame first
 	// then multiply it with the size of a sample frame (16 bit * stereo)

src/win32/XAudio2.cpp

@@ -56,7 +56,7 @@ public:
 	~XAudio2_Output();
 
 	// Initialization
-	bool init(int quality);
+	bool init(long sampleRate);
 
 	// Sound Data Feed
 	void write(const u16 * finalWave, int length);
@@ -137,7 +137,7 @@ XAudio2_Output::~XAudio2_Output()
 }
 
 
-bool XAudio2_Output::init(int quality)
+bool XAudio2_Output::init(long sampleRate)
 {
 	if( failed || initialized ) return false;
 
@@ -157,7 +157,7 @@ bool XAudio2_Output::init(int quality)
 	}
 
 
-	freq = 44100 / (UINT32)quality;
+	freq = sampleRate;
 
 	// calculate the number of samples per frame first
 	// then multiply it with the size of a sample frame (16 bit * stereo)
@@ -360,7 +360,7 @@ void XAudio2_Output::reset()
 
 	sVoice->FlushSourceBuffers();
 	sVoice->Start( 0 );
-	playing = true;	
+	playing = true;
 }