84 lines
1.4 KiB
Objective-C
84 lines
1.4 KiB
Objective-C
//
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// WavPackFile.m
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// Cog
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//
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// Created by Vincent Spader on 6/6/05.
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// Copyright 2005 Vincent Spader All rights reserved.
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//
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#import "WavPackFile.h"
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@implementation WavPackFile
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- (BOOL)open:(const char *)filename
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{
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int open_flags = 0;
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char error[80];
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wpc = WavpackOpenFileInput(filename, error, open_flags, 0);
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if (!wpc)
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return NO;
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channels = WavpackGetNumChannels(wpc);
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// bitsPerSample = WavpackGetBitsPerSample(wpc);
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bitsPerSample = 32;
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frequency = WavpackGetSampleRate(wpc);
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int samples;
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samples = WavpackGetNumSamples(wpc);
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totalSize = samples * channels * 4;
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bitRate = (int)(WavpackGetAverageBitrate(wpc, TRUE)/1000.0);
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//isBigEndian = YES;
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return YES;
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}
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- (BOOL)readInfo:(const char *)filename
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{
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[self open:filename]; //does the same damn thing
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return YES;
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}
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- (int)fillBuffer:(void *)buf ofSize:(UInt32)size
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{
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int numsamples;
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int n;
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numsamples = size/4/channels;
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// DBLog(@"NUM SAMPLES: %i %i", numsamples, size);
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n = WavpackUnpackSamples(wpc, buf, numsamples);
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n *= 4*channels;
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int i;
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for (i = 0; i < n/2; i++)
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{
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// ((UInt32 *)buf)[i] = CFSwapInt32LittleToHost(((UInt32 *)buf)[i]);
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((UInt16 *)buf)[i] = CFSwapInt16LittleToHost(((UInt16 *)buf)[i]);
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}
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return n;
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}
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- (double)seekToTime:(double)milliseconds
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{
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int sample;
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sample = (frequency/2)*(milliseconds/1000.0);
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WavpackSeekSample(wpc, sample);
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return milliseconds;
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}
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- (void)close
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{
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WavpackCloseFile(wpc);
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}
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@end
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