From fdb97bca427d07c2314fca158584a82791519c3d Mon Sep 17 00:00:00 2001 From: Josh Coalson Date: Sat, 23 Jun 2001 03:05:30 +0000 Subject: [PATCH] initial import --- include/FLAC/utility.h | 27 ++++++++++++++++++ src/libFLAC/utility.c | 77 ++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 104 insertions(+) create mode 100644 include/FLAC/utility.h create mode 100644 src/libFLAC/utility.c diff --git a/include/FLAC/utility.h b/include/FLAC/utility.h new file mode 100644 index 0000000..9498a56 --- /dev/null +++ b/include/FLAC/utility.h @@ -0,0 +1,27 @@ +/* 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. + */ + +#ifndef FLAC__UTILITY_H +#define FLAC__UTILITY_H + +#include "format.h" + +FLAC__bool FLAC__utility_get_streaminfo(const char *filename, FLAC__StreamMetaData_StreamInfo *streaminfo); + +#endif diff --git a/src/libFLAC/utility.c b/src/libFLAC/utility.c new file mode 100644 index 0000000..a5e8bfa --- /dev/null +++ b/src/libFLAC/utility.c @@ -0,0 +1,77 @@ +/* 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; +} -- 2.7.4