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