cog/Sound/ConverterNode.m

263 lines
6.3 KiB
Objective-C

//
// ConverterNode.m
// Cog
//
// Created by Zaphod Beeblebrox on 8/2/05.
// Copyright 2005 __MyCompanyName__. All rights reserved.
//
#import "ConverterNode.h"
#define BUFFER_SIZE 512 * 1024
#define CHUNK_SIZE 16 * 1024
void PrintStreamDesc (AudioStreamBasicDescription *inDesc)
{
if (!inDesc) {
printf ("Can't print a NULL desc!\n");
return;
}
printf ("- - - - - - - - - - - - - - - - - - - -\n");
printf (" Sample Rate:%f\n", inDesc->mSampleRate);
printf (" Format ID:%s\n", (char*)&inDesc->mFormatID);
printf (" Format Flags:%lX\n", inDesc->mFormatFlags);
printf (" Bytes per Packet:%ld\n", inDesc->mBytesPerPacket);
printf (" Frames per Packet:%ld\n", inDesc->mFramesPerPacket);
printf (" Bytes per Frame:%ld\n", inDesc->mBytesPerFrame);
printf (" Channels per Frame:%ld\n", inDesc->mChannelsPerFrame);
printf (" Bits per Channel:%ld\n", inDesc->mBitsPerChannel);
printf ("- - - - - - - - - - - - - - - - - - - -\n");
}
@implementation ConverterNode
//called from the complexfill when the audio is converted...good clean fun
static OSStatus ACInputProc(AudioConverterRef inAudioConverter, UInt32* ioNumberDataPackets, AudioBufferList* ioData, AudioStreamPacketDescription** outDataPacketDescription, void* inUserData)
{
ConverterNode *converter = (ConverterNode *)inUserData;
id previousNode = [converter previousNode];
OSStatus err = noErr;
void *readPtr;
int amountToWrite;
int availInput;
int amountRead;
if ([converter shouldContinue] == NO || [converter endOfStream] == YES)
{
// NSLog(@"END OF STREAM IN CONV");
ioData->mBuffers[0].mDataByteSize = 0;
*ioNumberDataPackets = 0;
return noErr;
}
amountToWrite = (*ioNumberDataPackets)*(converter->inputFormat.mBytesPerPacket);
if (converter->callbackBuffer != NULL)
free(converter->callbackBuffer);
converter->callbackBuffer = malloc(amountToWrite);
amountRead = [converter readData:converter->callbackBuffer amount:amountToWrite];
/* if ([converter endOfStream] == YES)
{
ioData->mBuffers[0].mDataByteSize = 0;
*ioNumberDataPackets = 0;
return noErr;
}
*/ if (amountRead == 0)
{
ioData->mBuffers[0].mDataByteSize = 0;
*ioNumberDataPackets = 0;
return 100; //Keep asking for data
}
/*
availInput = [[previousNode buffer] lengthAvailableToReadReturningPointer:&readPtr];
if (availInput == 0 )
{
// NSLog(@"0 INPUT");
ioData->mBuffers[0].mDataByteSize = 0;
*ioNumberDataPackets = 0;
if ([previousNode endOfStream] == YES)
{
NSLog(@"END OF CONVERTER INPUT");
[converter setEndOfStream:YES];
[converter setShouldContinue:NO];
return noErr;
}
return 100; //Keep asking for data
}
if (amountToWrite > availInput)
amountToWrite = availInput;
*ioNumberDataPackets = amountToWrite/(converter->inputFormat.mBytesPerPacket);
if (converter->callbackBuffer != NULL)
free(converter->callbackBuffer);
converter->callbackBuffer = malloc(amountToWrite);
memcpy(converter->callbackBuffer, readPtr, amountToWrite);
if (amountToWrite > 0)
{
[[previousNode buffer] didReadLength:amountToWrite];
[[previousNode semaphore] signal];
}
*/
// NSLog(@"Amount read: %@ %i", converter, amountRead);
ioData->mBuffers[0].mData = converter->callbackBuffer;
ioData->mBuffers[0].mDataByteSize = amountRead;
ioData->mBuffers[0].mNumberChannels = (converter->inputFormat.mChannelsPerFrame);
ioData->mNumberBuffers = 1;
return err;
}
-(void)process
{
char writeBuf[CHUNK_SIZE];
int amountConverted;
while ([self shouldContinue] == YES) //Need to watch EOS somehow....
{
amountConverted = [self convert:writeBuf amount:CHUNK_SIZE];
// NSLog(@"Amount converted %@: %i %i", self, amountConverted, [self endOfStream]);
if (amountConverted == 0 && [self endOfStream] == YES)
{
// NSLog(@"END OF STREAM FOR ZINE DINNER!!!!");
return;
}
[self writeData:writeBuf amount:amountConverted];
}
/* void *writePtr;
int availOutput;
int amountConverted;
while ([self shouldContinue] == YES)
{
availOutput = [buffer lengthAvailableToWriteReturningPointer:&writePtr];
while (availOutput == 0)
{
[semaphore wait];
if (shouldContinue == NO)
{
return;
}
availOutput = [buffer lengthAvailableToWriteReturningPointer:&writePtr];
}
amountConverted = [self convert:writePtr amount:availOutput];
if (amountConverted > 0)
[buffer didWriteLength:amountConverted];
}
*/
}
- (int)convert:(void *)dest amount:(int)amount
{
AudioBufferList ioData;
UInt32 ioNumberFrames;
OSStatus err;
ioNumberFrames = amount/outputFormat.mBytesPerFrame;
ioData.mBuffers[0].mData = dest;
ioData.mBuffers[0].mDataByteSize = amount;
ioData.mBuffers[0].mNumberChannels = outputFormat.mChannelsPerFrame;
ioData.mNumberBuffers = 1;
err = AudioConverterFillComplexBuffer(converter, ACInputProc, self, &ioNumberFrames, &ioData, NULL);
if (err == kAudioConverterErr_InvalidInputSize) //It returns insz at EOS at times...so run it again to make sure all data is converted
{
return [self convert:dest amount:amount];
}
// if (err != noErr)
// NSLog(@"Converter error: %i", err);
return ioData.mBuffers[0].mDataByteSize;
/*
void *readPtr;
int availInput;
availInput = [[previousLink buffer] lengthAvailableToReadReturningPointer:&readPtr];
// NSLog(@"AMOUNT: %i %i", amount, availInput);
if (availInput == 0)
{
if ([previousLink endOfInput] == YES)
{
endOfInput = YES;
NSLog(@"EOI");
shouldContinue = NO;
return 0;
}
}
if (availInput < amount)
amount = availInput;
memcpy(dest, readPtr, amount);
if (amount > 0)
{
// NSLog(@"READ: %i", amount);
[[previousLink buffer] didReadLength:amount];
[[previousLink semaphore] signal];
}
return amount;
*/
}
- (void)setupWithInputFormat:(AudioStreamBasicDescription)inf outputFormat:(AudioStreamBasicDescription)outf
{
//Make the converter
OSStatus stat = noErr;
inputFormat = inf;
outputFormat = outf;
stat = AudioConverterNew ( &inputFormat, &outputFormat, &converter);
if (stat != noErr)
{
DBLog(@"Error creating converter %i", stat);
}
if (inputFormat.mChannelsPerFrame == 1)
{
SInt32 channelMap[2] = { 0, 0 };
stat = AudioConverterSetProperty(converter,kAudioConverterChannelMap,sizeof(channelMap),channelMap);
if (stat != noErr)
{
DBLog(@"Error mapping channels %i", stat);
}
}
// DBLog(@"Created converter");
PrintStreamDesc(&inf);
PrintStreamDesc(&outf);
}
- (void)cleanUp
{
AudioConverterDispose(converter);
}
@end