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3a57f2f721
Most of the churn here occurs because 'filesize' is one of the redefined filesystem functions, but some of the structs used by the native FS code also include a 'filesize' member variable which gets renamed by the macro in some but not all source files. It's easier to rename 'filesize()' to 'ffilesize()' rather than try to clean up the macro mess or renaming the struct members. There is weirdness with root_realpath() which now breaks on native builds because it was assumed to be unprefixed there. dir_get_info() was unprefixed everywhere but this just seems inconsistent; make it follow the FS_PREFIX() convention too. Change-Id: Ic3700c6234ea45f32679c1a8429d70fdb8f4088a
104 lines
3.1 KiB
C
104 lines
3.1 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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*
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* Copyright (C) 2010 Yoshihisa Uchida
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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 <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 "logf.h"
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static const unsigned char bitspersamples[9] = {
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0, /* encoding */
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8, /* 1: G.711 MULAW */
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8, /* 2: Linear PCM 8bit */
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16, /* 3: Linear PCM 16bit */
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24, /* 4: Linear PCM 24bit */
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32, /* 5: Linear PCM 32bit */
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32, /* 6: IEEE float 32bit */
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64, /* 7: IEEE float 64bit */
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/* encoding 8 - 26 unsupported. */
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8, /* 27: G.711 ALAW */
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};
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static inline unsigned char get_au_bitspersample(unsigned int encoding)
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{
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if (encoding < 8)
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return bitspersamples[encoding];
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else if (encoding == 27)
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return bitspersamples[8];
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return 0;
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}
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bool get_au_metadata(int fd, struct mp3entry* id3)
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{
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/* temporary buffer */
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unsigned char* buf = (unsigned char *)id3->path;
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unsigned long numbytes = 0;
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int offset;
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id3->vbr = false; /* All Sun audio files are CBR */
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id3->filesize = ffilesize(fd);
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id3->length = 0;
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lseek(fd, 0, SEEK_SET);
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if ((read(fd, buf, 24) < 24) || (memcmp(buf, ".snd", 4) != 0))
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{
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/*
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* no header
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*
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* frequency: 8000 Hz
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* bits per sample: 8 bit
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* channel: mono
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*/
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numbytes = id3->filesize;
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id3->frequency = 8000;
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id3->bitrate = 8;
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}
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else
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{
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/* parse header */
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/* data offset */
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offset = get_long_be(buf + 4);
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if (offset < 24)
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{
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DEBUGF("CODEC_ERROR: sun audio offset size is small: %d\n", offset);
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return false;
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}
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/* data size */
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numbytes = get_long_be(buf + 8);
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if (numbytes == (uint32_t)0xffffffff)
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numbytes = id3->filesize - offset;
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id3->frequency = get_long_be(buf + 16);
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id3->bitrate = get_au_bitspersample(get_long_be(buf + 12)) * get_long_be(buf + 20)
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* id3->frequency / 1000;
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}
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/* Calculate track length [ms] */
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if (id3->bitrate)
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id3->length = (numbytes << 3) / id3->bitrate;
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return true;
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}
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