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78 lines
3.1 KiB
C
78 lines
3.1 KiB
C
/* libFLAC - Free Lossless Audio Codec library
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* Copyright (C) 2001 Josh Coalson
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include "FLAC/all.h"
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static FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 *buffer[], void *client_data);
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static void metadata_callback_(const FLAC__FileDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data);
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static void error_callback_(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
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FLAC__bool FLAC__utility_get_streaminfo(const char *filename, FLAC__StreamMetaData_StreamInfo *streaminfo)
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{
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FLAC__FileDecoder *decoder = FLAC__file_decoder_new();
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if(0 == decoder)
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return false;
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FLAC__file_decoder_set_md5_checking(decoder, false);
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FLAC__file_decoder_set_filename(decoder, filename);
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FLAC__file_decoder_set_write_callback(decoder, write_callback_);
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FLAC__file_decoder_set_metadata_callback(decoder, metadata_callback_);
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FLAC__file_decoder_set_error_callback(decoder, error_callback_);
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FLAC__file_decoder_set_client_data(decoder, &streaminfo);
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if(FLAC__file_decoder_init(decoder) != FLAC__FILE_DECODER_OK)
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return false;
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if(!FLAC__file_decoder_process_metadata(decoder))
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return false;
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if(FLAC__file_decoder_get_state(decoder) != FLAC__FILE_DECODER_UNINITIALIZED)
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FLAC__file_decoder_finish(decoder);
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FLAC__file_decoder_delete(decoder);
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return 0 != streaminfo; /* the metadata_callback_() will set streaminfo to 0 on an error */
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}
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FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__FileDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 *buffer[], void *client_data)
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{
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(void)decoder, (void)frame, (void)buffer, (void)client_data;
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return FLAC__STREAM_DECODER_WRITE_CONTINUE;
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}
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void metadata_callback_(const FLAC__FileDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data)
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{
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FLAC__StreamMetaData_StreamInfo **streaminfo = (FLAC__StreamMetaData_StreamInfo **)client_data;
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(void)decoder;
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if(metadata->type == FLAC__METADATA_TYPE_STREAMINFO && 0 != *streaminfo)
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**streaminfo = metadata->data.stream_info;
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}
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void error_callback_(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
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{
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FLAC__StreamMetaData_StreamInfo **streaminfo = (FLAC__StreamMetaData_StreamInfo **)client_data;
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(void)decoder;
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if(status != FLAC__STREAM_DECODER_ERROR_LOST_SYNC)
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*streaminfo = 0;
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}
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