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>
123 lines
4.5 KiB
C
123 lines
4.5 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) 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 <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 "logf.h"
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#define TTA1_SIGN 0x31415454
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#define TTA_HEADER_ID 0
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#define TTA_HEADER_AUDIO_FORMAT (TTA_HEADER_ID + sizeof(unsigned int))
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#define TTA_HEADER_NUM_CHANNELS (TTA_HEADER_AUDIO_FORMAT + sizeof(unsigned short))
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#define TTA_HEADER_BITS_PER_SAMPLE (TTA_HEADER_NUM_CHANNELS + sizeof(unsigned short))
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#define TTA_HEADER_SAMPLE_RATE (TTA_HEADER_BITS_PER_SAMPLE + sizeof(unsigned short))
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#define TTA_HEADER_DATA_LENGTH (TTA_HEADER_SAMPLE_RATE + sizeof(unsigned int))
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#define TTA_HEADER_CRC32 (TTA_HEADER_DATA_LENGTH + sizeof(unsigned int))
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#define TTA_HEADER_SIZE (TTA_HEADER_CRC32 + sizeof(unsigned int))
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#define TTA_HEADER_GETTER_ID(x) get_long_le(x)
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#define TTA_HEADER_GETTER_AUDIO_FORMAT(x) get_short_le(x)
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#define TTA_HEADER_GETTER_NUM_CHANNELS(x) get_short_le(x)
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#define TTA_HEADER_GETTER_BITS_PER_SAMPLE(x) get_short_le(x)
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#define TTA_HEADER_GETTER_SAMPLE_RATE(x) get_long_le(x)
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#define TTA_HEADER_GETTER_DATA_LENGTH(x) get_long_le(x)
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#define TTA_HEADER_GETTER_CRC32(x) get_long_le(x)
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#define GET_HEADER(x, tag) TTA_HEADER_GETTER_ ## tag((x) + TTA_HEADER_ ## tag)
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static void read_id3_tags(int fd, struct mp3entry* id3)
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{
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id3->title = NULL;
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id3->filesize = filesize(fd);
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id3->id3v2len = getid3v2len(fd);
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id3->tracknum = 0;
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id3->discnum = 0;
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id3->vbr = false; /* All TTA files are CBR */
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/* first get id3v2 tags. if no id3v2 tags ware found, get id3v1 tags */
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if (id3->id3v2len)
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{
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setid3v2title(fd, id3);
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id3->first_frame_offset = id3->id3v2len;
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return;
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}
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setid3v1title(fd, id3);
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}
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bool get_tta_metadata(int fd, struct mp3entry* id3)
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{
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unsigned char ttahdr[TTA_HEADER_SIZE];
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unsigned int datasize;
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unsigned int origsize;
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int bps;
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lseek(fd, 0, SEEK_SET);
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/* read id3 tags */
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read_id3_tags(fd, id3);
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lseek(fd, id3->id3v2len, SEEK_SET);
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/* read TTA header */
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if (read(fd, ttahdr, TTA_HEADER_SIZE) < 0)
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return false;
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/* check for TTA3 signature */
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if ((GET_HEADER(ttahdr, ID)) != TTA1_SIGN)
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return false;
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/* skip check CRC */
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id3->channels = (GET_HEADER(ttahdr, NUM_CHANNELS));
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id3->frequency = (GET_HEADER(ttahdr, SAMPLE_RATE));
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id3->length = ((GET_HEADER(ttahdr, DATA_LENGTH)) / id3->frequency) * 1000LL;
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bps = (GET_HEADER(ttahdr, BITS_PER_SAMPLE));
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datasize = id3->filesize - id3->first_frame_offset;
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origsize = (GET_HEADER(ttahdr, DATA_LENGTH)) * ((bps + 7) / 8) * id3->channels;
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id3->bitrate = (int) ((uint64_t) datasize * id3->frequency * id3->channels * bps
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/ (origsize * 1000LL));
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/* output header info (for debug) */
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DEBUGF("TTA header info ----\n");
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DEBUGF("id: %x\n", (unsigned int)(GET_HEADER(ttahdr, ID)));
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DEBUGF("channels: %d\n", id3->channels);
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DEBUGF("frequency: %ld\n", id3->frequency);
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DEBUGF("length: %ld\n", id3->length);
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DEBUGF("bitrate: %d\n", id3->bitrate);
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DEBUGF("bits per sample: %d\n", bps);
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DEBUGF("compressed size: %d\n", datasize);
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DEBUGF("original size: %d\n", origsize);
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DEBUGF("id3----\n");
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DEBUGF("artist: %s\n", id3->artist);
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DEBUGF("title: %s\n", id3->title);
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DEBUGF("genre: %s\n", id3->genre_string);
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return true;
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}
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