Nyaaori/rockbox
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity
rockbox/apps/metadata.c
Marcoen Hirschberg 2175d1edf6 split up the metadata parser 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13637 a1c6a512-1295-4272-9138-f99709370657
2007-06-16 18:19:51 +00:00

373 lines
9.9 KiB
C
Raw Blame History

/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2005 Dave Chapman
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <inttypes.h>
#include "system.h"
#include "playback.h"
#include "debug.h"
#include "logf.h"
#include "cuesheet.h"
#if CONFIG_CODEC == SWCODEC
#include "metadata/metadata_common.h"
#include "metadata/metadata_parsers.h"
static const unsigned short a52_bitrates[] =
{
32, 40, 48, 56, 64, 80, 96, 112, 128, 160,
192, 224, 256, 320, 384, 448, 512, 576, 640
};
/* Only store frame sizes for 44.1KHz - others are simply multiples
of the bitrate */
static const unsigned short a52_441framesizes[] =
{
69 * 2, 70 * 2, 87 * 2, 88 * 2, 104 * 2, 105 * 2, 121 * 2,
122 * 2, 139 * 2, 140 * 2, 174 * 2, 175 * 2, 208 * 2, 209 * 2,
243 * 2, 244 * 2, 278 * 2, 279 * 2, 348 * 2, 349 * 2, 417 * 2,
418 * 2, 487 * 2, 488 * 2, 557 * 2, 558 * 2, 696 * 2, 697 * 2,
835 * 2, 836 * 2, 975 * 2, 976 * 2, 1114 * 2, 1115 * 2, 1253 * 2,
1254 * 2, 1393 * 2, 1394 * 2
};
static const long wavpack_sample_rates [] =
{
6000, 8000, 9600, 11025, 12000, 16000, 22050, 24000,
32000, 44100, 48000, 64000, 88200, 96000, 192000
};
#endif /* CONFIG_CODEC == SWCODEC */
/* Simple file type probing by looking at the filename extension. */
unsigned int probe_file_format(const char *filename)
{
char *suffix;
unsigned int i;
suffix = strrchr(filename, '.');
if (suffix == NULL)
{
return AFMT_UNKNOWN;
}
/* skip '.' */
suffix++;
for (i = 1; i < AFMT_NUM_CODECS; i++)
{
/* search extension list for type */
const char *ext = audio_formats[i].ext_list;
do
{
if (strcasecmp(suffix, ext) == 0)
{
return i;
}
ext += strlen(ext) + 1;
}
while (*ext != '\0');
}
return AFMT_UNKNOWN;
}
/* Get metadata for track - return false if parsing showed problems with the
* file that would prevent playback.
*/
bool get_metadata(struct track_info* track, int fd, const char* trackname,
bool v1first)
{
#if CONFIG_CODEC == SWCODEC
unsigned char* buf;
unsigned long totalsamples;
int i;
#endif
/* Take our best guess at the codec type based on file extension */
track->id3.codectype = probe_file_format(trackname);
/* Load codec specific track tag information and confirm the codec type. */
switch (track->id3.codectype)
{
case AFMT_MPA_L1:
case AFMT_MPA_L2:
case AFMT_MPA_L3:
if (!get_mp3_metadata(fd, &track->id3, trackname, v1first))
{
return false;
}
break;
#if CONFIG_CODEC == SWCODEC
case AFMT_FLAC:
if (!get_flac_metadata(fd, &(track->id3)))
{
return false;
}
break;
case AFMT_APE:
if (!get_monkeys_metadata(fd, &(track->id3)))
{
return false;
}
read_ape_tags(fd, &(track->id3));
break;
case AFMT_MPC:
if (!get_musepack_metadata(fd, &(track->id3)))
return false;
read_ape_tags(fd, &(track->id3));
break;
case AFMT_OGG_VORBIS:
if (!get_vorbis_metadata(fd, &(track->id3)))/*detects and handles Ogg/Speex files*/
{
return false;
}
break;
case AFMT_SPEEX:
if (!get_speex_metadata(fd, &(track->id3)))
{
return false;
}
break;
case AFMT_PCM_WAV:
if (!get_wave_metadata(fd, &(track->id3)))
{
return false;
}
break;
case AFMT_WAVPACK:
/* A simple parser to read basic information from a WavPack file. This
* now works with self-extrating WavPack files. This no longer fails on
* WavPack files containing floating-point audio data because these are
* now converted to standard Rockbox format in the decoder.
*/
/* Use the trackname part of the id3 structure as a temporary buffer */
buf = (unsigned char *)track->id3.path;
for (i = 0; i < 256; ++i) {
/* at every 256 bytes into file, try to read a WavPack header */
if ((lseek(fd, i * 256, SEEK_SET) < 0) || (read(fd, buf, 32) < 32))
{
return false;
}
/* if valid WavPack 4 header version & not floating data, break */
if (memcmp (buf, "wvpk", 4) == 0 && buf [9] == 4 &&
(buf [8] >= 2 && buf [8] <= 0x10))
{
break;
}
}
if (i == 256) {
logf ("%s is not a WavPack file\n", trackname);
return false;
}
track->id3.vbr = true; /* All WavPack files are VBR */
track->id3.filesize = filesize (fd);
if ((buf [20] | buf [21] | buf [22] | buf [23]) &&
(buf [12] & buf [13] & buf [14] & buf [15]) != 0xff)
{
int srindx = ((buf [26] >> 7) & 1) + ((buf [27] << 1) & 14);
if (srindx == 15)
{
track->id3.frequency = 44100;
}
else
{
track->id3.frequency = wavpack_sample_rates[srindx];
}
totalsamples = get_long_le(&buf[12]);
track->id3.length = totalsamples / (track->id3.frequency / 100) * 10;
track->id3.bitrate = filesize (fd) / (track->id3.length / 8);
}
read_ape_tags(fd, &track->id3); /* use any apetag info we find */
break;
case AFMT_A52:
/* Use the trackname part of the id3 structure as a temporary buffer */
buf = (unsigned char *)track->id3.path;
if ((lseek(fd, 0, SEEK_SET) < 0) || (read(fd, buf, 5) < 5))
{
return false;
}
if ((buf[0] != 0x0b) || (buf[1] != 0x77))
{
logf("%s is not an A52/AC3 file\n",trackname);
return false;
}
i = buf[4] & 0x3e;
if (i > 36)
{
logf("A52: Invalid frmsizecod: %d\n",i);
return false;
}
track->id3.bitrate = a52_bitrates[i >> 1];
track->id3.vbr = false;
track->id3.filesize = filesize(fd);
switch (buf[4] & 0xc0)
{
case 0x00:
track->id3.frequency = 48000;
track->id3.bytesperframe=track->id3.bitrate * 2 * 2;
break;
case 0x40:
track->id3.frequency = 44100;
track->id3.bytesperframe = a52_441framesizes[i];
break;
case 0x80:
track->id3.frequency = 32000;
track->id3.bytesperframe = track->id3.bitrate * 3 * 2;
break;
default:
logf("A52: Invalid samplerate code: 0x%02x\n", buf[4] & 0xc0);
return false;
break;
}
/* One A52 frame contains 6 blocks, each containing 256 samples */
totalsamples = track->id3.filesize / track->id3.bytesperframe * 6 * 256;
track->id3.length = totalsamples / track->id3.frequency * 1000;
break;
case AFMT_ALAC:
case AFMT_AAC:
if (!get_mp4_metadata(fd, &(track->id3)))
{
return false;
}
break;
case AFMT_SHN:
track->id3.vbr = true;
track->id3.filesize = filesize(fd);
if (!skip_id3v2(fd, &(track->id3)))
{
return false;
}
/* TODO: read the id3v2 header if it exists */
break;
case AFMT_SID:
if (!get_sid_metadata(fd, &(track->id3)))
{
return false;
}
break;
case AFMT_SPC:
if(!get_spc_metadata(fd, &(track->id3)))
{
DEBUGF("get_spc_metadata error\n");
}
track->id3.filesize = filesize(fd);
track->id3.genre_string = id3_get_num_genre(36);
break;
case AFMT_ADX:
if (!get_adx_metadata(fd, &(track->id3)))
{
DEBUGF("get_adx_metadata error\n");
return false;
}
break;
case AFMT_NSF:
buf = (unsigned char *)track->id3.path;
if ((lseek(fd, 0, SEEK_SET) < 0) || ((read(fd, buf, 8)) < 8))
{
DEBUGF("lseek or read failed\n");
return false;
}
track->id3.vbr = false;
track->id3.filesize = filesize(fd);
if (memcmp(buf,"NESM",4) && memcmp(buf,"NSFE",4)) return false;
break;
case AFMT_AIFF:
if (!get_aiff_metadata(fd, &(track->id3)))
{
return false;
}
break;
#endif /* CONFIG_CODEC == SWCODEC */
default:
/* If we don't know how to read the metadata, assume we can't play
the file */
return false;
break;
}
/* We have successfully read the metadata from the file */
#ifndef __PCTOOL__
if (cuesheet_is_enabled() && look_for_cuesheet_file(trackname, NULL))
{
track->id3.cuesheet_type = 1;
}
#endif
lseek(fd, 0, SEEK_SET);
strncpy(track->id3.path, trackname, sizeof(track->id3.path));
track->taginfo_ready = true;
return true;
}
Reference in a new issue View git blame Copy permalink