// // WavPackFile.m // Cog // // Created by Vincent Spader on 6/6/05. // Copyright 2005 Vincent Spader All rights reserved. // #import "WavPackFile.h" @implementation WavPackFile - (BOOL)open:(const char *)filename { int open_flags = 0; char error[80]; wpc = WavpackOpenFileInput(filename, error, open_flags, 0); if (!wpc) return NO; channels = WavpackGetNumChannels(wpc); bitsPerSample = WavpackGetBitsPerSample(wpc); // bitsPerSample = 32; NSLog(@"BYTES PER SAMPLE: %i", WavpackGetBitsPerSample(wpc)); NSLog(@"BYTES PER SAMPLE: %i", WavpackGetBytesPerSample(wpc)); frequency = WavpackGetSampleRate(wpc); int samples; samples = WavpackGetNumSamples(wpc); totalSize = samples * channels * 4; bitRate = (int)(WavpackGetAverageBitrate(wpc, TRUE)/1000.0); isBigEndian = hostIsBigEndian(); return YES; } - (BOOL)readInfo:(const char *)filename { [self open:filename]; //does the same damn thing return YES; } - (int)fillBuffer:(void *)buf ofSize:(UInt32)size { int numsamples; int n; void *sampleBuf = malloc(size*2); numsamples = size/(bitsPerSample/8)/channels; // DBLog(@"NUM SAMPLES: %i %i", numsamples, size); n = WavpackUnpackSamples(wpc, sampleBuf, numsamples); int i; for (i = 0; i < n*channels; i++) { ((UInt16 *)buf)[i] = ((UInt32 *)sampleBuf)[i]; } n *= (bitsPerSample/8)*channels; return n; } - (double)seekToTime:(double)milliseconds { int sample; sample = (frequency/2)*(milliseconds/1000.0); WavpackSeekSample(wpc, sample); return milliseconds; } - (void)close { WavpackCloseFile(wpc); } @end