cadb3627fc
librbcodec users must provide these two files when the library is built. rbcodecconfig.h provides configuration #defines and basic types, and will be included by public librbcodec headers, so it must not conflict with the user's code. rbcodecplatform.h provides various OS functions, and will only be included by source files and private headers. This system is intended to provide maximum flexibility for use on embedded systems, where no operating system headers are included. Unix systems can just copy rbcodecconfig-example.h and rbcodecplatform-unix.h with minimal changes. Change-Id: I350a2274d173da391fd1ca00c4202e9760d91def Reviewed-on: http://gerrit.rockbox.org/143 Reviewed-by: Nils Wallménius <nils@rockbox.org> Tested-by: Nils Wallménius <nils@rockbox.org>
108 lines
3.4 KiB
C
108 lines
3.4 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2005 Dave Chapman
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <inttypes.h>
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#include "platform.h"
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#include "metadata.h"
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#include "metadata_common.h"
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#include "metadata_parsers.h"
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#include "debug.h"
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/* compressionType: AIFC QuickTime IMA ADPCM */
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#define AIFC_FORMAT_QT_IMA_ADPCM "ima4"
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bool get_aiff_metadata(int fd, struct mp3entry* id3)
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{
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unsigned char buf[512];
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unsigned long numChannels = 0;
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unsigned long numSampleFrames = 0;
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unsigned long numbytes = 0;
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bool is_aifc = false;
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if ((lseek(fd, 0, SEEK_SET) < 0) || (read(fd, &buf[0], 12) < 12) ||
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(memcmp(&buf[0], "FORM", 4) != 0) || (memcmp(&buf[8], "AIF", 3) != 0) ||
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(!(is_aifc = (buf[11] == 'C')) && buf[11] != 'F'))
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{
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return false;
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}
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while (read(fd, &buf[0], 8) == 8)
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{
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size_t size = get_long_be(&buf[4]); /* chunkSize */
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if (memcmp(&buf[0], "SSND", 4) == 0)
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{
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numbytes = size - 8;
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break; /* assume COMM was already read */
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}
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/* odd chunk sizes must be padded */
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size += size & 1;
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if (size > sizeof(buf))
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{
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DEBUGF("AIFF \"%4.4s\" chunk too large (%zd > %zd)",
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(char*) &buf[0], size, sizeof(buf));
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}
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if (memcmp(&buf[0], "COMM", 4) == 0)
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{
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if (size > sizeof(buf) || read(fd, &buf[0], size) != (ssize_t)size)
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return false;
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numChannels = ((buf[0]<<8)|buf[1]);
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numSampleFrames = get_long_be(&buf[2]);
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/* sampleRate */
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id3->frequency = get_long_be(&buf[10]);
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id3->frequency >>= (16+14-buf[9]);
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/* save format infos */
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id3->bitrate = ((buf[6]<<8)|buf[7]) * numChannels * id3->frequency;
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id3->bitrate /= 1000;
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if (!is_aifc || memcmp(&buf[18], AIFC_FORMAT_QT_IMA_ADPCM, 4) != 0)
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id3->length = ((int64_t) numSampleFrames * 1000) / id3->frequency;
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else
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{
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/* QuickTime IMA ADPCM is 1block = 64 data for each channel */
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id3->length = ((int64_t) numSampleFrames * 64000LL) / id3->frequency;
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}
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id3->vbr = false; /* AIFF files are CBR */
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id3->filesize = filesize(fd);
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}
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else
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{
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/* skip chunk */
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if (lseek(fd, size, SEEK_CUR) < 0)
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return false;
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}
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}
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return numbytes && numChannels;
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}
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