start 380 project5

changes to 380 project 4
changes to 350 project 2

Signed-off-by: Amrit Panesar <apanesar@4195tech.com>

COM380/Project5/GambleKit/Engine/Sound/GkSoundSource.cpp

@@ -0,0 +1,87 @@
+//--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
+//	GambleKit Copyright (C) 2014 Ivan Donev
+//
+//	This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.
+//
+//	This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
+//
+//	You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+//
+//	contact: gamblekit@gmail.com
+//--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
+
+#include "GkSoundSource.h"
+
+#include <string>
+#include <AL\alut.h>
+
+#pragma pack(1)
+struct WAVFileHeader
+{
+	char chunkID[4];				// "RIFF"
+	unsigned int chunkSize;
+	char format[4];					// "WAVE"
+
+	char subchunk1Id[4];			// "fmt "
+	unsigned int subchunk1Size;
+	unsigned short audioFormat;		// 1 - PCM
+	unsigned short numChannels;		// 1 - mono, 2 - stereo
+	unsigned int sampleRate;		// 22050, 44100, etc.
+	unsigned int byteRate;			// == SampleRate * NumChannels * BitsPerSample / 8
+	unsigned short blockAlign;		// == NumChannels * BitsPerSample / 8. The number of bytes for one sample including
+	unsigned short bitsPerSample;	// 8, 16, etc.
+	//unsigned short extraParamsSize;	//if PCM does not exist
+	//extraParams;						//variable format
+
+	//char subchunk2Id[4];			// "data"
+	//unsigned int subchunk2Size;
+};
+
+GkSoundSource::GkSoundSource(void)
+{
+	alGenSources(1, &this->handle);
+
+	this->buffer = 0;
+}
+
+
+GkSoundSource::~GkSoundSource(void)
+{
+	this->UnloadBuffer();
+
+	alDeleteSources(1, &this->handle);
+}
+
+void GkSoundSource::LoadFromMemory(void *wavData)
+{
+	ALenum format;
+	ALvoid *data;
+	ALsizei size, frequency;
+
+	WAVFileHeader *header = (WAVFileHeader*)wavData;
+	int dataOffset = 20 + header->subchunk1Size;
+	while (memcmp((char*)&((char*)wavData)[dataOffset], &"data", 4) != 0)
+	{
+		dataOffset += *((int*)&(((char*)wavData)[dataOffset + 4])) + 8;
+	}
+	size = *((int*)&(((char*)wavData)[dataOffset + 4]));
+	data = (ALvoid*)&(((char*)wavData)[dataOffset + 8]);
+	format = header->numChannels == 1 ? header->bitsPerSample == 8 ? AL_FORMAT_MONO8 : AL_FORMAT_MONO16 : header->bitsPerSample == 8 ? AL_FORMAT_STEREO8 : AL_FORMAT_STEREO16;
+	frequency = header->sampleRate;
+
+	this->UnloadBuffer();
+
+	alGenBuffers(1, &this->buffer);
+	alBufferData(this->buffer, format, data, size, frequency);
+
+	alSourcei(this->handle, AL_BUFFER, this->buffer);
+}
+
+void GkSoundSource::UnloadBuffer()
+{
+	if (this->buffer == 0)
+		return;
+
+	alDeleteBuffers(1, &this->buffer);
+	this->buffer = 0;
+}