medfall

commit bd18dda0f3aa406641f7f55a8e67c6deddfd8030
parent 53aba482ca5d34f6c2dc100ef7b5f90d089390d5
Author: Michael Savage <mikejsavage@gmail.com>
Date:   Mon Jan 23 23:22:33 +0200

Start working on Windows audio output with XAudio2

Diffstat:
platform_audio_output.cc
 | 
4
+++-
platform_audio_output.h
 | 
4
+++-
win32_audio_output.cc
 | 
106
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
win32_audio_output.h
 | 
9
+++++++++
4 files changed, 121 insertions(+), 2 deletions(-)
diff --git a/platform_audio_output.cc b/platform_audio_output.cc
@@ -1,6 +1,8 @@
 #include "platform.h"
 
-#if PLATFORM_LINUX
+#if PLATFORM_WINDOWS
+#include "win32_audio_output.cc"
+#elif PLATFORM_LINUX
 #include "linux_audio_output.cc"
 #elif PLATFORM_OSX
 #include "darwin_audio_output.cc"
diff --git a/platform_audio_output.h b/platform_audio_output.h
@@ -14,7 +14,9 @@ void audio_output_term();
 void audio_output_open( AudioOutputDevice * device, AudioOutputCallback callback );
 void audio_output_close( AudioOutputDevice * device );
 
-#if PLATFORM_LINUX
+#if PLATFORM_WINDOWS
+#include "win32_audio_output.h"
+#elif PLATFORM_LINUX
 #include "linux_audio_output.h"
 #elif PLATFORM_OSX
 #include "darwin_audio_output.h"
diff --git a/win32_audio_output.cc b/win32_audio_output.cc
@@ -0,0 +1,106 @@
+// https://github.com/walbourn/directx-sdk-samples/blob/master/XAudio2/XAudio2AsyncStream/XAudio2AsyncStream.cpp
+
+#include <windows.h>
+#include <wrl/client.h>
+#include <C:/Program Files (x86)/Microsoft DirectX SDK (June 2010)/Include/comdecl.h>
+#include <C:/Program Files (x86)/Microsoft DirectX SDK (June 2010)/Include/xaudio2.h>
+
+#include "intrinsics.h"
+#include "log.h"
+#include "platform_audio_output.h"
+// #include "platform_library.h"
+#include "platform_thread.h"
+
+// static Library xaudio_lib = NULL;
+
+static IXAudio2 * xaudio2 = NULL;
+static IXAudio2MasteringVoice * mastering_voice = NULL;
+
+void audio_output_init() {
+	if( FAILED( CoInitializeEx( nullptr, COINIT_MULTITHREADED ) ) ) {
+		FATAL( "CoInitializeEx" );
+	}
+
+	if( FAILED( XAudio2Create( &xaudio2, 0, XAUDIO2_DEFAULT_PROCESSOR ) ) ) {
+		FATAL( "XAudio2Create" );
+	}
+
+	if( FAILED( xaudio2->CreateMasteringVoice( &mastering_voice ) ) ) {
+		FATAL( "CreateMasteringVoice" );
+	}
+
+	// xaudio_lib = library_open( "xaudio2_7.dll" );
+	// if( xaudio_lib == NULL ) {
+	// 	FATAL( "Couldn't open xaudio2_7.dll: %s", library_last_error() );
+	// }
+}
+
+void audio_output_term() {
+	// library_close( xaudio_lib );
+
+	mastering_voice->DestroyVoice();
+	xaudio2->Reset();
+
+	CoUninitialize();
+
+	xaudio2 = NULL;
+	mastering_voice = NULL;
+}
+
+static THREAD( audio_output_thread ) {
+	AudioOutputDevice * device = ( AudioOutputDevice * ) data;
+
+	// double buffering
+	s16 buffers[ 1024 ][ 2 ];
+	u32 buffer_idx = 0;
+	for( ;; ) {
+		for( ;; ) {
+			XAUDIO2_VOICE_STATE state;
+			device->voice->GetState( &state );
+			if( state.BuffersQueued < ARRAY_COUNT( buffers ) - 1 ) {
+				break;
+			}
+
+			// WaitForSingleObject( voiceContext.hBufferEndEvent, INFINITE );
+			// TODO: wait for semaphore or something
+		}
+
+		device->callback( buffers[ buffer_idx ], ARRAY_COUNT( buffers[ buffer_idx ] ) );
+
+		XAUDIO2_BUFFER buf;
+		zero( &buf );
+		buf.AudioBytes = sizeof( buffers[ buffer_idx ] );
+		buf.pAudioData = buffers[ buffer_idx ];
+
+		if( FAILED( device->voice->SubmitSourceBuffer( &buf ) ) ) {
+			FATAL( "SubmitSourceBuffer" );
+		}
+
+		buffer_idx = ( buffer_idx + 1 ) % ARRAY_COUNT( buffers );
+	}
+
+	THREAD_END;
+}
+
+void audio_output_open( AudioOutputDevice * device, AudioOutputCallback callback ) {
+	WAVEFORMATEX format;
+	zero( &format );
+	format.wFormatTag = 1;
+	format.nChannels = 1;
+	format.nSamplesPerSec = 44100;
+	format.nAvgBytesPerSec = 44100;
+	format.nBlockAlign = 1;
+	format.wBitsPerSample = 8;
+	format.cbSize = 0;
+
+	if( FAILED( xaudio2->CreateSourceVoice( &device->voice, &format ) ) ) {
+		FATAL( "CreateSourceVoice" );
+	}
+
+	device->voice->start( 0, 0 );
+}
+
+void audio_output_close( AudioOutputDevice * device ) {
+	device->voice->Stop( 0 );
+	device->voice->DestroyVoice();
+}
diff --git a/win32_audio_output.h b/win32_audio_output.h
@@ -0,0 +1,9 @@
+#pragma once
+
+#include "platform_thread.h"
+
+struct AudioOutputDevice {
+	IXAudio2SourceVoice * voice;
+	Thread thread;
+	AudioOutputCallback * callback;
+};