239 lines
5.3 KiB
Objective-C
239 lines
5.3 KiB
Objective-C
//
|
|
// InputNode.m
|
|
// Cog
|
|
//
|
|
// Created by Vincent Spader on 8/2/05.
|
|
// Copyright 2005 Vincent Spader. All rights reserved.
|
|
//
|
|
|
|
#import "InputNode.h"
|
|
#import "BufferChain.h"
|
|
#import "Plugin.h"
|
|
#import "CoreAudioUtils.h"
|
|
#import "AudioPlayer.h"
|
|
#import "OutputNode.h"
|
|
|
|
|
|
#import "Logging.h"
|
|
|
|
@implementation InputNode
|
|
@synthesize exitAtTheEndOfTheStream;
|
|
|
|
|
|
- (id)initWithController:(id)c previous:(id)p {
|
|
self = [super initWithController:c previous:p];
|
|
if (self) {
|
|
exitAtTheEndOfTheStream = [[Semaphore alloc] init];
|
|
}
|
|
|
|
return self;
|
|
}
|
|
|
|
|
|
- (BOOL)openWithSource:(id<CogSource>)source
|
|
{
|
|
decoder = [AudioDecoder audioDecoderForSource:source];
|
|
[decoder retain];
|
|
|
|
if (decoder == nil)
|
|
return NO;
|
|
|
|
[self registerObservers];
|
|
|
|
if (![decoder open:source])
|
|
{
|
|
ALog(@"Couldn't open decoder...");
|
|
return NO;
|
|
}
|
|
|
|
NSDictionary *properties = [decoder properties];
|
|
int bitsPerSample = [[properties objectForKey:@"bitsPerSample"] intValue];
|
|
int channels = [[properties objectForKey:@"channels"] intValue];
|
|
|
|
bytesPerFrame = (bitsPerSample / 8) * channels;
|
|
|
|
shouldContinue = YES;
|
|
shouldSeek = NO;
|
|
|
|
return YES;
|
|
}
|
|
|
|
- (BOOL)openWithDecoder:(id<CogDecoder>) d
|
|
{
|
|
DLog(@"Opening with old decoder: %@", d);
|
|
decoder = d;
|
|
[decoder retain];
|
|
|
|
NSDictionary *properties = [decoder properties];
|
|
int bitsPerSample = [[properties objectForKey:@"bitsPerSample"] intValue];
|
|
int channels = [[properties objectForKey:@"channels"] intValue];
|
|
|
|
bytesPerFrame = (bitsPerSample / 8) * channels;
|
|
|
|
[self registerObservers];
|
|
|
|
shouldContinue = YES;
|
|
shouldSeek = NO;
|
|
|
|
DLog(@"DONES: %@", decoder);
|
|
return YES;
|
|
}
|
|
|
|
|
|
- (void)registerObservers
|
|
{
|
|
DLog(@"REGISTERING OBSERVERS");
|
|
[decoder addObserver:self
|
|
forKeyPath:@"properties"
|
|
options:(NSKeyValueObservingOptionNew)
|
|
context:NULL];
|
|
|
|
[decoder addObserver:self
|
|
forKeyPath:@"metadata"
|
|
options:(NSKeyValueObservingOptionNew)
|
|
context:NULL];
|
|
}
|
|
|
|
- (void)observeValueForKeyPath:(NSString *)keyPath
|
|
ofObject:(id)object
|
|
change:(NSDictionary *)change
|
|
context:(void *)context
|
|
{
|
|
DLog(@"SOMETHING CHANGED!");
|
|
if ([keyPath isEqual:@"properties"]) {
|
|
//Setup converter!
|
|
//Inform something of properties change
|
|
//Disable support until it is properly implemented.
|
|
//[controller inputFormatDidChange: propertiesToASBD([decoder properties])];
|
|
}
|
|
else if ([keyPath isEqual:@"metadata"]) {
|
|
//Inform something of metadata change
|
|
}
|
|
}
|
|
|
|
- (void)process
|
|
{
|
|
int amountInBuffer = 0;
|
|
void *inputBuffer = malloc(CHUNK_SIZE);
|
|
|
|
BOOL shouldClose = YES;
|
|
BOOL seekError = NO;
|
|
|
|
while ([self shouldContinue] == YES && [self endOfStream] == NO)
|
|
{
|
|
if (shouldSeek == YES)
|
|
{
|
|
OutputNode *output = [[controller controller] output];
|
|
BOOL isPaused = [output isPaused];
|
|
if ( !isPaused ) [output pause];
|
|
DLog(@"SEEKING!");
|
|
seekError = [decoder seek:seekFrame] < 0;
|
|
if ( !isPaused ) [output resume];
|
|
shouldSeek = NO;
|
|
DLog(@"Seeked! Resetting Buffer");
|
|
|
|
[self resetBuffer];
|
|
|
|
DLog(@"Reset buffer!");
|
|
initialBufferFilled = NO;
|
|
}
|
|
|
|
if (amountInBuffer < CHUNK_SIZE) {
|
|
int framesToRead = (CHUNK_SIZE - amountInBuffer)/bytesPerFrame;
|
|
int framesRead = [decoder readAudio:((char *)inputBuffer) + amountInBuffer frames:framesToRead];
|
|
|
|
if (framesRead > 0 && !seekError)
|
|
{
|
|
amountInBuffer += (framesRead * bytesPerFrame);
|
|
[self writeData:inputBuffer amount:amountInBuffer];
|
|
amountInBuffer = 0;
|
|
}
|
|
else
|
|
{
|
|
if (initialBufferFilled == NO) {
|
|
[controller initialBufferFilled:self];
|
|
}
|
|
|
|
DLog(@"End of stream? %@", [self properties]);
|
|
|
|
endOfStream = YES;
|
|
shouldClose = [controller endOfInputReached]; //Lets us know if we should keep going or not (occassionally, for track changes within a file)
|
|
DLog(@"closing? is %i", shouldClose);
|
|
|
|
// wait before exiting, as we might still get seeking request
|
|
DLog("InputNode: Before wait")
|
|
[exitAtTheEndOfTheStream waitIndefinitely];
|
|
DLog("InputNode: After wait, should seek = %d", shouldSeek)
|
|
if (shouldSeek)
|
|
{
|
|
endOfStream = NO;
|
|
shouldClose = NO;
|
|
continue;
|
|
}
|
|
else
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (shouldClose)
|
|
[decoder close];
|
|
|
|
|
|
free(inputBuffer);
|
|
|
|
[exitAtTheEndOfTheStream signal];
|
|
|
|
DLog("Input node thread stopping");
|
|
}
|
|
|
|
- (void)seek:(long)frame
|
|
{
|
|
seekFrame = frame;
|
|
shouldSeek = YES;
|
|
DLog(@"Should seek!");
|
|
[semaphore signal];
|
|
|
|
if (endOfStream)
|
|
{
|
|
[exitAtTheEndOfTheStream signal];
|
|
}
|
|
}
|
|
|
|
- (BOOL)setTrack:(NSURL *)track
|
|
{
|
|
if ([decoder respondsToSelector:@selector(setTrack:)] && [decoder setTrack:track]) {
|
|
DLog(@"SET TRACK!");
|
|
|
|
return YES;
|
|
}
|
|
|
|
return NO;
|
|
}
|
|
|
|
- (void)dealloc
|
|
{
|
|
DLog(@"Input Node dealloc");
|
|
[decoder removeObserver:self forKeyPath:@"properties"];
|
|
[decoder removeObserver:self forKeyPath:@"metadata"];
|
|
|
|
[decoder release];
|
|
|
|
[exitAtTheEndOfTheStream release];
|
|
[super dealloc];
|
|
}
|
|
|
|
- (NSDictionary *) properties
|
|
{
|
|
return [decoder properties];
|
|
}
|
|
|
|
- (id<CogDecoder>) decoder
|
|
{
|
|
return decoder;
|
|
}
|
|
|
|
@end
|