From ce99a65c941d86922f1335a4847a5a61b7b44fa4 Mon Sep 17 00:00:00 2001
From: bgk <bgk@a31d4220-a93d-0410-bf67-fe4944624d44>
Date: Sun, 20 Apr 2008 07:33:58 +0000
Subject: [PATCH] Ooops. Forgot that file in my last commit.

---
 src/gtk/sndPortAudio.cpp | 181 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 181 insertions(+)
 create mode 100644 src/gtk/sndPortAudio.cpp

diff --git a/src/gtk/sndPortAudio.cpp b/src/gtk/sndPortAudio.cpp
new file mode 100644
index 00000000..2021f82a
--- /dev/null
+++ b/src/gtk/sndPortAudio.cpp
@@ -0,0 +1,181 @@
+#include <stdio.h>
+#include <string.h>
+#include <portaudio.h>
+
+#ifndef _WIN32
+# include <unistd.h>
+#else
+# include <Windows.h>
+#endif
+
+#include "../System.h"
+#include "../Sound.h"
+#include "../Globals.h"
+
+extern int emulating;
+
+bool systemSoundOn = false;
+
+static PaStreamParameters outputParameters;
+static PaStream *stream;
+static PaError err;
+
+static u16 *stereodata16;
+static u32 soundoffset;
+static volatile u32 soundpos;
+static u32 soundbufsize;
+
+static int audioFree()
+{
+   if (soundoffset > soundpos)
+      return soundbufsize - soundoffset + soundpos;
+   else
+      return soundpos - soundoffset;
+}
+
+static int patestCallback( const void *inputBuffer, void *outputBuffer,
+                            unsigned long framesPerBuffer,
+                            const PaStreamCallbackTimeInfo* timeInfo,
+                            PaStreamCallbackFlags statusFlags,
+                            void *userData )
+{
+    const int outBufferLength = framesPerBuffer * sizeof(u16) * 2;
+    u8 *out = (u8*)outputBuffer;
+    
+    if (!emulating || soundPaused)
+    {
+        memset(out, 0, outBufferLength);
+        return paContinue;
+    }
+
+    if (soundbufsize - audioFree() < outBufferLength)
+        fprintf(stderr, "** PortAudio : buffer underflow **\n");
+
+    u8 *soundbuf = (u8 *)stereodata16;
+    
+    for (int i = 0; i < outBufferLength; i++)
+    {
+        if (soundpos >= soundbufsize)
+            soundpos = 0;
+
+        out[i] = soundbuf[soundpos];
+        soundpos++;
+    }
+
+    return paContinue;    
+}
+
+void systemWriteDataToSoundBuffer()
+{
+    u32 copy1size = 0, copy2size = 0;
+
+    while (emulating && !speedup & !systemThrottle && (audioFree() < soundBufferLen))
+    {
+#ifndef _WIN32
+        usleep(1000);
+#else
+        Sleep(1);
+#endif
+    }
+
+    if ((soundbufsize - soundoffset) < soundBufferLen)
+    {
+        copy1size = (soundbufsize - soundoffset);
+        copy2size = soundBufferLen - copy1size;
+    }
+    else
+    {
+        copy1size = soundBufferLen;
+        copy2size = 0;
+    }
+
+    memcpy((((u8 *)stereodata16)+soundoffset), soundFinalWave, copy1size);
+
+    if (copy2size)
+        memcpy(stereodata16, ((u8 *)soundFinalWave)+copy1size, copy2size);
+
+    soundoffset += copy1size + copy2size;
+    soundoffset %= soundbufsize;
+}
+
+bool systemSoundInit()
+{
+    int sampleRate;
+    int buffersize = 0;
+    
+    err = Pa_Initialize();
+    if (err != paNoError) goto error;
+    
+    outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */
+    outputParameters.channelCount = 2;       /* stereo output */
+    outputParameters.sampleFormat = paInt16;
+    outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultHighOutputLatency;
+    outputParameters.hostApiSpecificStreamInfo = NULL;
+
+    switch(soundQuality) {
+        case 1:
+            sampleRate = 44100;
+            soundBufferLen = 1470*2;
+        break;
+        case 2:
+            sampleRate = 22050;
+            soundBufferLen = 736*2;
+        break;
+        case 4:
+            sampleRate = 11025;
+            soundBufferLen = 368*2;
+        break;
+    }
+
+    soundbufsize = (soundBufferLen + 1) * 4;
+
+    fprintf(stderr, "i %d %d\n", soundbufsize, sampleRate);
+
+    stereodata16 = new u16[soundbufsize];
+    memset(stereodata16, 0, soundbufsize);
+    soundpos = 0;
+
+    err = Pa_OpenStream(
+              &stream,
+              NULL, /* no input */
+              &outputParameters,
+              sampleRate,
+              0,
+              paClipOff,      /* we won't output out of range samples so don't bother clipping them */
+              patestCallback,
+              NULL );
+    if (err != paNoError) goto error;
+
+    err = Pa_StartStream( stream );
+    if (err != paNoError) goto error;
+    
+    systemSoundOn = true;
+    
+    return true;
+error:
+    Pa_Terminate();
+    fprintf(stderr, "An error occured while using the portaudio stream\n");
+    fprintf(stderr, "Error number: %d\n", err);
+    fprintf(stderr, "Error message: %s\n", Pa_GetErrorText(err));
+    return false;
+}
+
+void systemSoundShutdown()
+{
+    Pa_CloseStream(stream);
+    Pa_Terminate();
+
+    delete[] stereodata16;
+}
+
+void systemSoundPause()
+{
+}
+
+void systemSoundResume()
+{
+}
+
+void systemSoundReset()
+{
+}