sm64pc/tools/audiofile-0.3.6/examples/osxplay.c

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2020-05-05 12:15:53 +00:00
/*
Audio File Library
Copyright (c) 2003, Michael Pruett. All rights reserved.
Redistribution and use in source and binary forms, with or
without modification, are permitted provided that the following
conditions are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following
disclaimer in the documentation and/or other materials provided
with the distribution.
3. The name of the author may not be used to endorse or promote
products derived from this software without specific prior
written permission.
THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
osxplay.c
This program demonstrates audio file playback using the Audio
File Library and Core Audio.
*/
#include <audiofile.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <CoreServices/CoreServices.h>
#include <AudioUnit/AudioUnit.h>
#include <CoreAudio/CoreAudio.h>
#define BUFFER_FRAME_COUNT 1024
int isPlaying = 1;
void *buffer = NULL;
void getASBDForFile (AFfilehandle file, int track,
AudioStreamBasicDescription *asbd)
{
int sampleFormat, sampleWidth, channelCount;
double rate;
afGetVirtualSampleFormat(file, track, &sampleFormat, &sampleWidth);
channelCount = afGetChannels(file, track);
rate = afGetRate(file, track);
asbd->mSampleRate = rate;
asbd->mFormatID = kAudioFormatLinearPCM;
switch (sampleFormat)
{
case AF_SAMPFMT_TWOSCOMP:
asbd->mFormatFlags = kAudioFormatFlagIsSignedInteger;
asbd->mBitsPerChannel = sampleWidth;
break;
case AF_SAMPFMT_UNSIGNED:
asbd->mFormatFlags = 0;
asbd->mBitsPerChannel = sampleWidth;
break;
case AF_SAMPFMT_FLOAT:
asbd->mFormatFlags = kAudioFormatFlagIsFloat;
asbd->mBitsPerChannel = 32;
break;
case AF_SAMPFMT_DOUBLE:
asbd->mFormatFlags = kAudioFormatFlagIsFloat;
asbd->mBitsPerChannel = 64;
break;
}
asbd->mChannelsPerFrame = channelCount;
asbd->mFramesPerPacket = 1;
asbd->mBytesPerFrame = ceilf(afGetVirtualFrameSize(file, track, 1));
asbd->mBytesPerPacket = asbd->mBytesPerFrame;
if (afGetVirtualByteOrder(file, track) == AF_BYTEORDER_BIGENDIAN)
asbd->mFormatFlags |= kAudioFormatFlagIsBigEndian;
}
OSStatus openOutput (AudioUnit *outputUnit)
{
OSStatus status = noErr;
ComponentDescription description;
Component component;
description.componentType = kAudioUnitType_Output;
description.componentSubType = kAudioUnitSubType_DefaultOutput;
description.componentManufacturer = kAudioUnitManufacturer_Apple;
description.componentFlags = 0;
description.componentFlagsMask = 0;
component = FindNextComponent(NULL, &description);
if (component == NULL)
{
fprintf(stderr, "Could not find audio output device.\n");
exit(EXIT_FAILURE);
}
status = OpenAComponent(component, outputUnit);
if (status != noErr)
{
fprintf(stderr, "Could not open audio output device.\n");
exit(EXIT_FAILURE);
}
status = AudioUnitInitialize(*outputUnit);
if (status != noErr)
{
fprintf(stderr, "Could not initialize audio output device.\n");
exit(EXIT_FAILURE);
}
return status;
}
OSStatus fileRenderProc (void *inRefCon,
AudioUnitRenderActionFlags *inActionFlags,
const AudioTimeStamp *inTimeStamp,
UInt32 inBusNumber,
UInt32 inNumFrames,
AudioBufferList *ioData)
{
AFfilehandle file = (AFfilehandle) inRefCon;
AFframecount framesToRead, framesRead;
framesToRead = inNumFrames;
if (framesToRead > BUFFER_FRAME_COUNT)
framesToRead = BUFFER_FRAME_COUNT;
framesRead = afReadFrames(file, AF_DEFAULT_TRACK,
buffer, framesToRead);
if (framesRead > 0)
{
ioData->mBuffers[0].mData = buffer;
ioData->mBuffers[0].mDataByteSize = framesRead *
afGetVirtualFrameSize(file, AF_DEFAULT_TRACK, 1);
}
else
isPlaying = 0;
return noErr;
}
OSStatus setupOutput (AudioUnit *outputUnit, AFfilehandle file)
{
OSStatus status = noErr;
UInt32 size;
Boolean outWritable;
AudioStreamBasicDescription fileASBD, inputASBD, outputASBD;
AURenderCallbackStruct renderCallback;
/* Set virtual sample format to single-precision floating-point. */
afSetVirtualSampleFormat(file, AF_DEFAULT_TRACK, AF_SAMPFMT_FLOAT, 32);
/* Get ASBD for virtual sample format. */
getASBDForFile(file, AF_DEFAULT_TRACK, &fileASBD);
status = AudioUnitGetPropertyInfo(*outputUnit,
kAudioUnitProperty_StreamFormat, kAudioUnitScope_Output,
0, &size, &outWritable);
status = AudioUnitGetProperty(*outputUnit,
kAudioUnitProperty_StreamFormat, kAudioUnitScope_Output,
0, &outputASBD, &size);
if (outWritable)
{
outputASBD = fileASBD;
status = AudioUnitSetProperty(*outputUnit,
kAudioUnitProperty_StreamFormat, kAudioUnitScope_Output,
0, &outputASBD, size);
}
inputASBD = fileASBD;
status = AudioUnitSetProperty(*outputUnit,
kAudioUnitProperty_StreamFormat, kAudioUnitScope_Input,
0, &inputASBD, size);
if (status != noErr)
{
fprintf(stderr, "Could not set input stream format.\n");
exit(EXIT_FAILURE);
}
/*
Set the render callback to a procedure which will
read from the file.
*/
renderCallback.inputProc = fileRenderProc;
renderCallback.inputProcRefCon = file;
status = AudioUnitSetProperty(*outputUnit,
kAudioUnitProperty_SetRenderCallback, kAudioUnitScope_Input, 0,
&renderCallback, sizeof (AURenderCallbackStruct));
if (status != noErr)
{
fprintf(stderr, "Could not set render callback.\n");
exit(EXIT_FAILURE);
}
return status;
}
int main (int argc, char **argv)
{
AFfilehandle file;
AudioUnit outputUnit;
if (argc < 2)
{
fprintf(stderr, "usage: %s filename\n", argv[0]);
exit(EXIT_FAILURE);
}
file = afOpenFile(argv[1], "r", AF_NULL_FILESETUP);
if (file == AF_NULL_FILEHANDLE)
{
fprintf(stderr, "Could not open file '%s' for reading.\n", argv[1]);
exit(EXIT_FAILURE);
}
openOutput(&outputUnit);
setupOutput(&outputUnit, file);
AudioOutputUnitStart(outputUnit);
buffer = malloc(BUFFER_FRAME_COUNT *
afGetVirtualFrameSize(file, AF_DEFAULT_TRACK, 1));
while (isPlaying)
usleep(250000);
AudioOutputUnitStop(outputUnit);
AudioUnitUninitialize(outputUnit);
CloseComponent(outputUnit);
free(buffer);
afCloseFile(file);
}