// // FlacFile.m // zyVorbis // // Created by Vincent Spader on 1/25/05. // Copyright 2005 Vincent Spader All rights reserved. // #import "FlacFile.h" @implementation FlacFile FLAC__StreamDecoderWriteStatus WriteProc(const FLAC__FileDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const sampleBuffer[], void *client_data) { // DBLog(@"Write callback"); FlacFile *flacFile = (FlacFile *)client_data; unsigned wide_samples = frame->header.blocksize; unsigned channels = frame->header.channels; UInt16 *buffer = (UInt16 *)[flacFile buffer]; int i, j, c; for (i = j = 0; i < wide_samples; i++) { for (c = 0; c < channels; c++, j++) { // buffer[j] = CFSwapInt16LittleToHost(sampleBuffer[c][i]); buffer[j] = sampleBuffer[c][i]; } } // memcpy([flacFile buffer], sampleBuffer, wide_samples*[flacFile bitsPerSample]/8); [flacFile setBufferAmount:(wide_samples * channels*2)]; return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE; } void MetadataProc(const FLAC__FileDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data) { FlacFile *flacFile = (FlacFile *)client_data; flacFile->channels = metadata->data.stream_info.channels; flacFile->frequency = metadata->data.stream_info.sample_rate; flacFile->bitsPerSample = metadata->data.stream_info.bits_per_sample; // DBLog(@"METADATAAAA LENGTH: %i %i %f", (int)(metadata->data.stream_info.total_samples),[flacFile frequency], (float)(metadata->data.stream_info.total_samples)/[flacFile frequency]); flacFile->totalSize = metadata->data.stream_info.total_samples*metadata->data.stream_info.channels*metadata->data.stream_info.bits_per_sample/8; } void ErrorProc(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data) { DBLog(@"Error callback"); } - (BOOL)open:(const char *)filename { FLAC__bool status; decoder = FLAC__file_decoder_new(); if (decoder == NULL) return NO; status = FLAC__file_decoder_set_filename(decoder, filename); if (status == false) return NO; status = FLAC__file_decoder_set_write_callback(decoder, WriteProc); if (status == false) return NO; status = FLAC__file_decoder_set_metadata_callback(decoder, MetadataProc); if (status == false) return NO; status = FLAC__file_decoder_set_error_callback(decoder, ErrorProc); if (status == false) return NO; status = FLAC__file_decoder_set_client_data(decoder, self); if (status == false) return NO; if (FLAC__file_decoder_init(decoder) != FLAC__FILE_DECODER_OK) return NO; FLAC__file_decoder_process_until_end_of_metadata(decoder); isBigEndian = hostIsBigEndian(); return YES; } - (BOOL)readInfo:(const char *)filename { FLAC__StreamMetadata streamInfo; FLAC__metadata_get_streaminfo(filename, &streamInfo); channels = streamInfo.data.stream_info.channels; frequency = streamInfo.data.stream_info.sample_rate; bitsPerSample = streamInfo.data.stream_info.bits_per_sample; totalSize = streamInfo.data.stream_info.total_samples*channels*(bitsPerSample/8); bitRate = 0; return YES; } - (int)fillBuffer:(void *)buf ofSize:(UInt32)size { int count; int numread; if (bufferAmount == 0) { int i; if (FLAC__file_decoder_get_state (decoder) == FLAC__FILE_DECODER_END_OF_FILE) { return 0; } i = FLAC__file_decoder_process_single(decoder);// != FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE); //return 0; // [self writeSamplesToBuffer:buffer fromBuffer:sampleBuffer ofSize:(status*2)]; // write callback sets bufferAmount...frickin weird, also sets sampleBuffer // bufferAmount = status*4; } count = bufferAmount; if (bufferAmount > size) { count = size; } memcpy(buf, buffer, count); bufferAmount -= count; if (bufferAmount > 0) memmove(buffer, &buffer[count], bufferAmount); if (count < size) numread = [self fillBuffer:(&((char *)buf)[count]) ofSize:(size - count)]; else numread = 0; return count + numread; } - (void)close { if (decoder) { FLAC__file_decoder_finish(decoder); FLAC__file_decoder_delete(decoder); } decoder = NULL; } - (double)seekToTime:(double)milliseconds { FLAC__file_decoder_seek_absolute(decoder, frequency * ((double)milliseconds/1000.0)); return milliseconds; } //bs methods - (char *)buffer { return buffer; } - (int)bufferAmount { return bufferAmount; } - (void)setBufferAmount:(int)amount { bufferAmount = amount; } - (FLAC__FileDecoder *)decoder { return decoder; } @end