diff options
Diffstat (limited to 'Samples/CommonSrc/Platform/OSX_WavPlayer.cpp')
| -rw-r--r-- | Samples/CommonSrc/Platform/OSX_WavPlayer.cpp | 242 |
1 files changed, 242 insertions, 0 deletions
diff --git a/Samples/CommonSrc/Platform/OSX_WavPlayer.cpp b/Samples/CommonSrc/Platform/OSX_WavPlayer.cpp new file mode 100644 index 0000000..6119888 --- /dev/null +++ b/Samples/CommonSrc/Platform/OSX_WavPlayer.cpp @@ -0,0 +1,242 @@ +/************************************************************************************
+
+Filename : WavPlayer_OSX.cpp
+Content : An Apple OSX audio handler.
+Created : March 5, 2013
+Authors : Robotic Arm Software - Peter Hoff, Dan Goodman, Bryan Croteau
+
+Copyright : Copyright 2013 Oculus VR, Inc. All Rights reserved.
+
+Use of this software is subject to the terms of the Oculus LLC license
+agreement provided at the time of installation or download, or which
+otherwise accompanies this software in either electronic or hard copy form.
+
+************************************************************************************/
+
+#include "OSX_WavPlayer.h"
+
+namespace OVR { namespace Platform { namespace OSX {
+
+WavPlayer::WavPlayer(const char* fileName)
+{
+ FileName = fileName;
+}
+
+bool WavPlayer::isDataChunk(unsigned char* buffer, int index)
+{
+ unsigned char a = buffer[index];
+ unsigned char b = buffer[index + 1];
+ unsigned char c = buffer[index + 2];
+ unsigned char d = buffer[index + 3];
+ return (a == 'D' || a == 'd') && (b == 'A' || b == 'a') &&
+ (c == 'T' || c == 't') && (d == 'A' || d == 'a');
+}
+
+int WavPlayer::getWord(unsigned char* buffer, int index)
+{
+ unsigned char a = buffer[index];
+ unsigned char b = buffer[index + 1];
+ unsigned char c = buffer[index + 2];
+ unsigned char d = buffer[index + 3];
+ int result = 0;
+ result |= a;
+ result |= b << 8;
+ result |= c << 16;
+ result |= d << 24;
+ return result;
+}
+
+short WavPlayer::getHalf(unsigned char* buffer, int index)
+{
+ unsigned char a = buffer[index];
+ unsigned char b = buffer[index + 1];
+ short result = 0;
+ result |= a;
+ result |= b << 8;
+ return result;
+}
+
+void *WavPlayer::LoadPCM(const char *filename, unsigned long *len)
+{
+ FILE *file;
+ struct stat s;
+ void *pcm;
+
+ if(stat(filename, &s))
+ {
+ return NULL;
+ }
+ *len = s.st_size;
+ pcm = (void *) malloc(s.st_size);
+ if(!pcm)
+ {
+ return NULL;
+ }
+ file = fopen(filename, "rb");
+ if(!file)
+ {
+ free(pcm);
+ return NULL;
+ }
+ fread(pcm, s.st_size, 1, file);
+ fclose(file);
+ return pcm;
+}
+
+int WavPlayer::PlayBuffer(void *pcmbuffer, unsigned long len)
+{
+ AQCallbackStruct aqc;
+ UInt32 err, bufferSize;
+ int i;
+
+ aqc.DataFormat.mSampleRate = SampleRate;
+ aqc.DataFormat.mFormatID = kAudioFormatLinearPCM;
+ if(BitsPerSample == 16)
+ {
+ aqc.DataFormat.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger
+ | kAudioFormatFlagIsPacked;
+ }
+ aqc.DataFormat.mBytesPerPacket = NumChannels * (BitsPerSample / 8);
+ aqc.DataFormat.mFramesPerPacket = 1;
+ aqc.DataFormat.mBytesPerFrame = NumChannels * (BitsPerSample / 8);
+ aqc.DataFormat.mChannelsPerFrame = NumChannels;
+ aqc.DataFormat.mBitsPerChannel = BitsPerSample;
+ aqc.FrameCount = SampleRate / 60;
+ aqc.SampleLen = (UInt32)(len);
+ aqc.PlayPtr = 0;
+ aqc.PCMBuffer = static_cast<unsigned char*>(pcmbuffer);
+
+ err = AudioQueueNewOutput(&aqc.DataFormat,
+ aqBufferCallback,
+ &aqc,
+ NULL,
+ kCFRunLoopCommonModes,
+ 0,
+ &aqc.Queue);
+ if(err)
+ {
+ return err;
+ }
+
+ aqc.FrameCount = SampleRate / 60;
+ bufferSize = aqc.FrameCount * aqc.DataFormat.mBytesPerPacket;
+
+ for(i = 0; i < AUDIO_BUFFERS; i++)
+ {
+ err = AudioQueueAllocateBuffer(aqc.Queue, bufferSize,
+ &aqc.Buffers[i]);
+ if(err)
+ {
+ return err;
+ }
+ aqBufferCallback(&aqc, aqc.Queue, aqc.Buffers[i]);
+ }
+
+ err = AudioQueueStart(aqc.Queue, NULL);
+ if(err)
+ {
+ return err;
+ }
+
+ while(true)
+ {
+ }
+ sleep(1);
+ return 0;
+}
+
+void WavPlayer::aqBufferCallback(void *in, AudioQueueRef inQ, AudioQueueBufferRef outQB)
+{
+ AQCallbackStruct *aqc;
+ unsigned char *coreAudioBuffer;
+
+ aqc = (AQCallbackStruct *) in;
+ coreAudioBuffer = (unsigned char*) outQB->mAudioData;
+
+ printf("Sync: %u / %u\n", aqc->PlayPtr, aqc->SampleLen);
+
+ if(aqc->FrameCount > 0)
+ {
+ outQB->mAudioDataByteSize = aqc->DataFormat.mBytesPerFrame * aqc->FrameCount;
+ for(int i = 0; i < aqc->FrameCount * aqc->DataFormat.mBytesPerFrame; i++)
+ {
+ if(aqc->PlayPtr > aqc->SampleLen)
+ {
+ aqc->PlayPtr = 0;
+ i = 0;
+ }
+ coreAudioBuffer[i] = aqc->PCMBuffer[aqc->PlayPtr];
+ aqc->PlayPtr++;
+ }
+ AudioQueueEnqueueBuffer(inQ, outQB, 0, NULL);
+ }
+}
+
+int WavPlayer::PlayAudio()
+{
+ unsigned long len;
+ void *pcmbuffer;
+ int ret;
+
+ pcmbuffer = LoadPCM(FileName, &len);
+ if(!pcmbuffer)
+ {
+ fprintf(stderr, "%s: %s\n", FileName, strerror(errno));
+ exit(EXIT_FAILURE);
+ }
+
+ unsigned char* bytes = (unsigned char*)pcmbuffer;
+ int index = 0;
+
+ // 'RIFF'
+ getWord(bytes, index);
+ index += 4;
+ // int Length
+ getWord(bytes, index);
+ index += 4;
+ // 'WAVE'
+ getWord(bytes, index);
+ index += 4;
+ // 'fmt '
+ getWord(bytes, index);
+ index += 4;
+
+ // int Format Length
+ int fmtLen = getWord(bytes, index);
+ index += 4;
+ AudioFormat = getHalf(bytes, index);
+ index += 2;
+ NumChannels = getHalf(bytes, index);
+ index += 2;
+ SampleRate = getWord(bytes, index);
+ index += 4;
+ ByteRate = getWord(bytes, index);
+ index += 4;
+ BlockAlign = getHalf(bytes, index);
+ index += 2;
+ BitsPerSample = getHalf(bytes, index);
+ index += 2;
+ index += fmtLen - 16;
+ while(!isDataChunk(bytes, index))
+ {
+ // Any Chunk
+ getWord(bytes, index);
+ index += 4;
+ // Any Chunk Length
+ int anyChunkLen = getWord(bytes, index);
+ index += 4 + anyChunkLen;
+ }
+ // 'data'
+ getWord(bytes, index);
+ index += 4;
+ // int Data Length
+ unsigned long dataLen = getWord(bytes, index);
+ index += 4;
+ unsigned char* target = &bytes[index];
+
+ ret = PlayBuffer((void *)target, dataLen);
+ free(pcmbuffer);
+ return ret;
+}
+
+}}}
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