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rockbox/apps/metadata/wave.c
Yoshihisa Uchida 66ebc35c55 Wave/Wave64/vox metadata parser: optimize just a little. 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@24992 a1c6a512-1295-4272-9138-f99709370657
2010-03-02 10:59:46 +00:00

353 lines
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2005 Dave Chapman
* Copyright (C) 2010 Yoshihisa Uchida
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* 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 "metadata.h"
#include "metadata_common.h"
#include "metadata_parsers.h"
#include "logf.h"
# define AV_WL32(p, d) do { \
((uint8_t*)(p))[0] = (d); \
((uint8_t*)(p))[1] = (d)>>8; \
((uint8_t*)(p))[2] = (d)>>16; \
((uint8_t*)(p))[3] = (d)>>24; \
} while(0)
# define AV_WL16(p, d) do { \
((uint8_t*)(p))[0] = (d); \
((uint8_t*)(p))[1] = (d)>>8; \
} while(0)
/* Wave(RIFF)/Wave64 format */
/* Wave64 GUIDs */
#define WAVE64_GUID_RIFF "riff\x2e\x91\xcf\x11\xa5\xd6\x28\xdb\x04\xc1\x00\x00"
#define WAVE64_GUID_WAVE "wave\xf3\xac\xd3\x11\x8c\xd1\x00\xc0\x4f\x8e\xdb\x8a"
#define WAVE64_GUID_FMT "fmt \xf3\xac\xd3\x11\x8c\xd1\x00\xc0\x4f\x8e\xdb\x8a"
#define WAVE64_GUID_DATA "data\xf3\xac\xd3\x11\x8c\xd1\x00\xc0\x4f\x8e\xdb\x8a"
enum
{
WAVE_FORMAT_PCM = 0x0001, /* Microsoft PCM Format */
WAVE_FORMAT_ADPCM = 0x0002, /* Microsoft ADPCM Format */
WAVE_FORMAT_IEEE_FLOAT = 0x0003, /* IEEE Float */
WAVE_FORMAT_ALAW = 0x0006, /* Microsoft ALAW */
WAVE_FORMAT_MULAW = 0x0007, /* Microsoft MULAW */
WAVE_FORMAT_DVI_ADPCM = 0x0011, /* Intel's DVI ADPCM */
WAVE_FORMAT_DIALOGIC_OKI_ADPCM = 0x0017, /* Dialogic OKI ADPCM */
WAVE_FORMAT_YAMAHA_ADPCM = 0x0020, /* Yamaha ADPCM */
WAVE_FORMAT_XBOX_ADPCM = 0x0069, /* XBOX ADPCM */
IBM_FORMAT_MULAW = 0x0101, /* same as WAVE_FORMAT_MULAW */
IBM_FORMAT_ALAW = 0x0102, /* same as WAVE_FORMAT_ALAW */
WAVE_FORMAT_ATRAC3 = 0x0270, /* Atrac3 stream */
WAVE_FORMAT_SWF_ADPCM = 0x5346, /* Adobe SWF ADPCM */
};
struct wave_fmt {
unsigned int formattag;
unsigned long channels;
unsigned int blockalign;
unsigned long bitspersample;
unsigned int samplesperblock;
uint64_t numbytes;
};
static unsigned long get_totalsamples(struct wave_fmt *fmt, struct mp3entry* id3)
{
unsigned long totalsamples = 0;
switch (fmt->formattag)
{
case WAVE_FORMAT_PCM:
case WAVE_FORMAT_IEEE_FLOAT:
case WAVE_FORMAT_ALAW:
case WAVE_FORMAT_MULAW:
case IBM_FORMAT_ALAW:
case IBM_FORMAT_MULAW:
totalsamples =
fmt->numbytes / ((fmt->bitspersample >> 3) * fmt->channels);
break;
case WAVE_FORMAT_ADPCM:
case WAVE_FORMAT_DVI_ADPCM:
case WAVE_FORMAT_XBOX_ADPCM:
totalsamples = (fmt->numbytes / fmt->blockalign) * fmt->samplesperblock;
break;
case WAVE_FORMAT_YAMAHA_ADPCM:
if (fmt->samplesperblock == 0)
{
if (fmt->blockalign == ((id3->frequency / 60) + 4) * fmt->channels)
fmt->samplesperblock = id3->frequency / 30;
else
fmt->samplesperblock = (fmt->blockalign << 1) / fmt->channels;
}
totalsamples = (fmt->numbytes / fmt->blockalign) * fmt->samplesperblock;
break;
case WAVE_FORMAT_DIALOGIC_OKI_ADPCM:
totalsamples = fmt->numbytes << 1;
break;
case WAVE_FORMAT_SWF_ADPCM:
if (fmt->samplesperblock == 0)
fmt->samplesperblock = (((fmt->blockalign << 3) - 2) / fmt->channels - 22)
/ fmt->bitspersample;
totalsamples = (fmt->numbytes / fmt->blockalign) * fmt->samplesperblock;
break;
default:
totalsamples = 0;
break;
}
return totalsamples;
}
static void parse_riff_format(unsigned char* buf, int fmtsize, struct wave_fmt *fmt,
struct mp3entry* id3)
{
/* wFormatTag */
fmt->formattag = buf[0] | (buf[1] << 8);
/* wChannels */
fmt->channels = buf[2] | (buf[3] << 8);
/* dwSamplesPerSec */
id3->frequency = get_long_le(&buf[4]);
/* dwAvgBytesPerSec */
id3->bitrate = (get_long_le(&buf[8]) * 8) / 1000;
/* wBlockAlign */
fmt->blockalign = buf[12] | (buf[13] << 8);
/* wBitsPerSample */
fmt->bitspersample = buf[14] | (buf[15] << 8);
if (fmtsize > 19)
{
/* wSamplesPerBlock */
fmt->samplesperblock = buf[18] | (buf[19] << 8);
}
}
bool get_wave_metadata(int fd, struct mp3entry* id3)
{
/* Use the trackname part of the id3 structure as a temporary buffer */
unsigned char* buf = (unsigned char *)id3->path;
struct wave_fmt fmt;
unsigned long totalsamples = 0;
unsigned long offset = 0;
int read_bytes;
int i;
memset(&fmt, 0, sizeof(struct wave_fmt));
/* get RIFF chunk header */
if ((lseek(fd, 0, SEEK_SET) < 0) || (read(fd, buf, 12) < 12))
{
return false;
}
offset += 12;
if ((memcmp(buf, "RIFF", 4) != 0) || (memcmp(&buf[8], "WAVE", 4) != 0))
{
DEBUGF("metadata error: missing riff header.\n");
return false;
}
/* iterate over WAVE chunks until 'data' chunk */
while (true)
{
/* get chunk header */
if (read(fd, buf, 8) < 8)
return false;
offset += 8;
/* chunkSize */
i = get_long_le(&buf[4]);
if (memcmp(buf, "fmt ", 4) == 0)
{
/* get rest of chunk */
if (i < 16)
return false;
read_bytes = (i > 19)? 20 : 16;
if (read(fd, buf, read_bytes) != read_bytes)
return false;
offset += read_bytes;
i -= read_bytes;
parse_riff_format(buf, read_bytes, &fmt, id3);
/* Check for ATRAC3 stream */
if (fmt.formattag == WAVE_FORMAT_ATRAC3)
{
int jsflag = 0;
if(id3->bitrate == 66 || id3->bitrate == 94)
jsflag = 1;
id3->extradata_size = 14;
id3->channels = 2;
id3->codectype = AFMT_OMA_ATRAC3;
/* Store the extradata for the codec */
AV_WL16(&id3->id3v2buf[0], 1); // always 1
AV_WL32(&id3->id3v2buf[2], id3->frequency); // samples rate
AV_WL16(&id3->id3v2buf[6], jsflag); // coding mode
AV_WL16(&id3->id3v2buf[8], jsflag); // coding mode
AV_WL16(&id3->id3v2buf[10], 1); // always 1
AV_WL16(&id3->id3v2buf[12], 0); // always 0
}
}
else if (memcmp(buf, "data", 4) == 0)
{
fmt.numbytes = i;
if (fmt.formattag == WAVE_FORMAT_ATRAC3)
id3->first_frame_offset = offset;
break;
}
else if (memcmp(buf, "fact", 4) == 0)
{
/* dwSampleLength */
if (i >= 4)
{
/* get rest of chunk */
if (read(fd, buf, 4) < 4)
return false;
offset += 4;
i -= 4;
totalsamples = get_long_le(buf);
}
}
/* seek to next chunk (even chunk sizes must be padded) */
i += (i & 0x01);
if(lseek(fd, i, SEEK_CUR) < 0)
return false;
offset += i;
}
if ((fmt.numbytes == 0) || (fmt.channels == 0) || (fmt.blockalign == 0))
{
DEBUGF("metadata error: numbytes, channels, or blockalign is 0.\n");
return false;
}
if (totalsamples == 0)
{
totalsamples = get_totalsamples(&fmt, id3);
}
id3->vbr = false; /* All WAV files are CBR */
id3->filesize = filesize(fd);
/* Calculate track length (in ms) and estimate the bitrate (in kbit/s) */
if(id3->codectype != AFMT_OMA_ATRAC3)
id3->length = ((int64_t) totalsamples * 1000) / id3->frequency;
else
id3->length = ((id3->filesize - id3->first_frame_offset) * 8) / id3->bitrate;
return true;
}
bool get_wave64_metadata(int fd, struct mp3entry* id3)
{
/* Use the trackname part of the id3 structure as a temporary buffer */
unsigned char* buf = (unsigned char *)id3->path;
struct wave_fmt fmt;
unsigned long totalsamples = 0;
int read_bytes;
uint64_t i;
memset(&fmt, 0, sizeof(struct wave_fmt));
/* get RIFF chunk header */
if ((lseek(fd, 0, SEEK_SET) < 0) || (read(fd, buf, 40) < 40))
return false;
if ((memcmp(buf , WAVE64_GUID_RIFF, 16) != 0)||
(memcmp(buf+24, WAVE64_GUID_WAVE, 16) != 0))
{
DEBUGF("metadata error: does not wave64 file\n");
return false;
}
/* iterate over WAVE chunks until 'data' chunk */
while (true)
{
/* get chunk header */
if (read(fd, buf, 24) < 24)
return false;
/* chunkSize (excludes GUID and size length) */
i = get_uint64_le(buf + 16) - 24;
if (memcmp(buf, WAVE64_GUID_FMT, 16) == 0)
{
DEBUGF("find 'fmt ' chunk\n");
if (i < 16)
return false;
read_bytes = (i > 16)? 24 : 16;
if ((int)i < read_bytes)
i = 0;
else
i -= read_bytes;
/* get rest of chunk */
if (read(fd, buf, read_bytes) < read_bytes)
return false;
parse_riff_format(buf, read_bytes, &fmt, id3);
}
else if (memcmp(buf, WAVE64_GUID_DATA, 16) == 0)
{
DEBUGF("find 'data' chunk\n");
fmt.numbytes = i;
break;
}
/* seek to next chunk (8byte bound) */
i += (1 + ~i) & 0x07;
if(lseek(fd, i, SEEK_CUR) < 0)
return false;
}
if ((fmt.numbytes == 0) || (fmt.channels == 0) || (fmt.blockalign == 0))
{
DEBUGF("metadata error: numbytes, channels, or blockalign is 0\n");
return false;
}
if (totalsamples == 0)
{
totalsamples = get_totalsamples(&fmt, id3);
}
id3->vbr = false; /* All Wave64 files are CBR */
id3->filesize = filesize(fd);
/* Calculate track length [ms] */
id3->length = ((int64_t) totalsamples * 1000) / id3->frequency;
return true;
}
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