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wave metadata parser reduces binsize.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25161 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Yoshihisa Uchida 2010-03-14 05:41:02 +00:00
parent efeb43b341
commit 2d1937a158
1 changed files with 53 additions and 64 deletions
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117
apps/metadata/wave.c
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@ -21,8 +21,6 @@
****************************************************************************/ ****************************************************************************/
#include <stdio.h> #include <stdio.h>
#include <string.h> #include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <inttypes.h> #include <inttypes.h>
#include "system.h" #include "system.h"
@ -51,28 +49,29 @@ enum {
FMT_CHUNK, FMT_CHUNK,
FACT_CHUNK, FACT_CHUNK,
DATA_CHUNK, DATA_CHUNK,
NUM_CHUNKS,
}; };
/* Wave chunk names */ /* Wave chunk names */
static const unsigned char *wave_chunknames[NUM_CHUNKS] = #define WAVE_CHUNKNAME_LENGTH 4
{ #define WAVE_CHUNKSIZE_LENGTH 4
[RIFF_CHUNK] = "RIFF",
[WAVE_CHUNK] = "WAVE", static const unsigned char *wave_chunklist = "RIFF"
[FMT_CHUNK] = "fmt ", "WAVE"
[FACT_CHUNK] = "fact", "fmt "
[DATA_CHUNK] = "data", "fact"
}; "data";
/* Wave64 GUIDs */ /* Wave64 GUIDs */
static const unsigned char *wave64_chunknames[NUM_CHUNKS] = #define WAVE64_CHUNKNAME_LENGTH 16
{ #define WAVE64_CHUNKSIZE_LENGTH 8
[RIFF_CHUNK] = "riff\x2e\x91\xcf\x11\xa5\xd6\x28\xdb\x04\xc1\x00\x00",
[WAVE_CHUNK] = "wave\xf3\xac\xd3\x11\x8c\xd1\x00\xc0\x4f\x8e\xdb\x8a", static const unsigned char *wave64_chunklist
[FMT_CHUNK] = "fmt \xf3\xac\xd3\x11\x8c\xd1\x00\xc0\x4f\x8e\xdb\x8a", = "riff\x2e\x91\xcf\x11\xa5\xd6\x28\xdb\x04\xc1\x00\x00"
[FACT_CHUNK] = "fact\xf3\xac\xd3\x11\x8c\xd1\x00\xc0\x4f\x8e\xdb\x8a", "wave\xf3\xac\xd3\x11\x8c\xd1\x00\xc0\x4f\x8e\xdb\x8a"
[DATA_CHUNK] = "data\xf3\xac\xd3\x11\x8c\xd1\x00\xc0\x4f\x8e\xdb\x8a", "fmt \xf3\xac\xd3\x11\x8c\xd1\x00\xc0\x4f\x8e\xdb\x8a"
}; "fact\xf3\xac\xd3\x11\x8c\xd1\x00\xc0\x4f\x8e\xdb\x8a"
"data\xf3\xac\xd3\x11\x8c\xd1\x00\xc0\x4f\x8e\xdb\x8a";
/* support formats */ /* support formats */
enum enum
@ -113,45 +112,35 @@ static void set_totalsamples(struct wave_fmt *fmt, struct mp3entry* id3)
case WAVE_FORMAT_MULAW: case WAVE_FORMAT_MULAW:
case IBM_FORMAT_ALAW: case IBM_FORMAT_ALAW:
case IBM_FORMAT_MULAW: case IBM_FORMAT_MULAW:
if (fmt->bitspersample != 0 && fmt->channels != 0) fmt->blockalign = fmt->bitspersample * fmt->channels >> 3;
fmt->totalsamples = fmt->numbytes / ((fmt->bitspersample >> 3) * fmt->channels); fmt->samplesperblock = 1;
break;
case WAVE_FORMAT_ADPCM:
case WAVE_FORMAT_DVI_ADPCM:
case WAVE_FORMAT_XBOX_ADPCM:
if (fmt->blockalign != 0)
fmt->totalsamples = (fmt->numbytes / fmt->blockalign) * fmt->samplesperblock;
break; break;
case WAVE_FORMAT_YAMAHA_ADPCM: case WAVE_FORMAT_YAMAHA_ADPCM:
if (fmt->blockalign != 0 && fmt->channels != 0) if (id3->channels != 0)
{ {
if (fmt->samplesperblock == 0) fmt->samplesperblock =
{ (fmt->blockalign == ((id3->frequency / 60) + 4) * fmt->channels)?
if (fmt->blockalign == ((id3->frequency / 60) + 4) * fmt->channels) id3->frequency / 30 : (fmt->blockalign << 1) / fmt->channels;
fmt->samplesperblock = id3->frequency / 30;
else
fmt->samplesperblock = (fmt->blockalign << 1) / fmt->channels;
}
fmt->totalsamples = (fmt->numbytes / fmt->blockalign) * fmt->samplesperblock;
} }
break; break;
case WAVE_FORMAT_DIALOGIC_OKI_ADPCM: case WAVE_FORMAT_DIALOGIC_OKI_ADPCM:
fmt->totalsamples = fmt->numbytes << 1; fmt->blockalign = 1;
fmt->samplesperblock = 2;
break; break;
case WAVE_FORMAT_SWF_ADPCM: case WAVE_FORMAT_SWF_ADPCM:
if (fmt->blockalign != 0 && fmt->bitspersample != 0 && fmt->channels != 0) if (fmt->bitspersample != 0 && id3->channels != 0)
{ {
if (fmt->samplesperblock == 0) fmt->samplesperblock
fmt->samplesperblock = (((fmt->blockalign << 3) - 2) / fmt->channels - 22) = (((fmt->blockalign << 3) - 2) / fmt->channels - 22)
/ fmt->bitspersample; / fmt->bitspersample + 1;
fmt->totalsamples = (fmt->numbytes / fmt->blockalign) * fmt->samplesperblock;
} }
break; break;
default: default:
fmt->totalsamples = 0;
break; break;
} }
if (fmt->blockalign != 0)
fmt->totalsamples = (fmt->numbytes / fmt->blockalign) * fmt->samplesperblock;
} }
static void parse_riff_format(unsigned char* buf, int fmtsize, struct wave_fmt *fmt, static void parse_riff_format(unsigned char* buf, int fmtsize, struct wave_fmt *fmt,
@ -208,15 +197,16 @@ static void parse_riff_format(unsigned char* buf, int fmtsize, struct wave_fmt *
} }
} }
static bool read_header(int fd, struct mp3entry* id3, const unsigned char **chunknames, bool is_64) static bool read_header(int fd, struct mp3entry* id3, const unsigned char *chunknames,
bool is_64)
{ {
/* Use the temporary buffer */ /* Use the temporary buffer */
unsigned char* buf = (unsigned char *)id3->path; unsigned char* buf = (unsigned char *)id3->path;
struct wave_fmt fmt; struct wave_fmt fmt;
unsigned int namelen = (is_64)? 16 : 4; unsigned int namelen = (is_64)? WAVE64_CHUNKNAME_LENGTH : WAVE_CHUNKNAME_LENGTH;
unsigned int sizelen = (is_64)? 8 : 4; unsigned int sizelen = (is_64)? WAVE64_CHUNKSIZE_LENGTH : WAVE_CHUNKSIZE_LENGTH;
unsigned int len = namelen + sizelen; unsigned int len = namelen + sizelen;
uint64_t chunksize; uint64_t chunksize;
uint64_t offset = len + namelen; uint64_t offset = len + namelen;
@ -228,8 +218,8 @@ static bool read_header(int fd, struct mp3entry* id3, const unsigned char **chun
lseek(fd, 0, SEEK_SET); lseek(fd, 0, SEEK_SET);
read(fd, buf, offset); read(fd, buf, offset);
if ((memcmp(buf, chunknames[RIFF_CHUNK], namelen) != 0) || if ((memcmp(buf, chunknames + RIFF_CHUNK * namelen, namelen) != 0) ||
(memcmp(buf + len, chunknames[WAVE_CHUNK], namelen) != 0)) (memcmp(buf + len, chunknames + WAVE_CHUNK * namelen, namelen) != 0))
{ {
DEBUGF("metadata error: missing riff header.\n"); DEBUGF("metadata error: missing riff header.\n");
return false; return false;
@ -251,7 +241,7 @@ static bool read_header(int fd, struct mp3entry* id3, const unsigned char **chun
chunksize = (is_64) ? get_uint64_le(buf + namelen) - len : chunksize = (is_64) ? get_uint64_le(buf + namelen) - len :
get_long_le(buf + namelen); get_long_le(buf + namelen);
if (memcmp(buf, chunknames[DATA_CHUNK], namelen) == 0) if (memcmp(buf, chunknames + DATA_CHUNK * namelen, namelen) == 0)
{ {
DEBUGF("find 'data' chunk\n"); DEBUGF("find 'data' chunk\n");
fmt.numbytes = chunksize; fmt.numbytes = chunksize;
@ -265,7 +255,7 @@ static bool read_header(int fd, struct mp3entry* id3, const unsigned char **chun
offset += chunksize; offset += chunksize;
read_data = 0; read_data = 0;
if (memcmp(buf, chunknames[FMT_CHUNK], namelen) == 0) if (memcmp(buf, chunknames + FMT_CHUNK * namelen, namelen) == 0)
{ {
DEBUGF("find 'fmt ' chunk\n"); DEBUGF("find 'fmt ' chunk\n");
@ -281,7 +271,7 @@ static bool read_header(int fd, struct mp3entry* id3, const unsigned char **chun
read(fd, buf, read_data); read(fd, buf, read_data);
parse_riff_format(buf, read_data, &fmt, id3); parse_riff_format(buf, read_data, &fmt, id3);
} }
else if (memcmp(buf, chunknames[FACT_CHUNK], namelen) == 0) else if (memcmp(buf, chunknames + FACT_CHUNK * namelen, namelen) == 0)
{ {
DEBUGF("find 'fact' chunk\n"); DEBUGF("find 'fact' chunk\n");
@ -301,20 +291,19 @@ static bool read_header(int fd, struct mp3entry* id3, const unsigned char **chun
if (fmt.totalsamples == 0) if (fmt.totalsamples == 0)
set_totalsamples(&fmt, id3); set_totalsamples(&fmt, id3);
if (id3->frequency == 0 || id3->bitrate == 0)
{
DEBUGF("metadata error: frequency or bitrate is 0\n");
return false;
}
id3->vbr = false; /* All Wave/Wave64 files are CBR */ id3->vbr = false; /* All Wave/Wave64 files are CBR */
id3->filesize = filesize(fd); id3->filesize = filesize(fd);
/* Calculate track length (in ms) and estimate the bitrate (in kbit/s) */ /* Calculate track length (in ms) and estimate the bitrate (in kbit/s) */
if(fmt.formattag != WAVE_FORMAT_ATRAC3) id3->length = (fmt.formattag != WAVE_FORMAT_ATRAC3)?
{ (uint64_t)fmt.totalsamples * 1000 / id3->frequency :
if (id3->frequency != 0) ((id3->filesize - id3->first_frame_offset) * 8) / id3->bitrate;
id3->length = ((int64_t) fmt.totalsamples * 1000) / id3->frequency;
}
else
{
if (id3->bitrate != 0)
id3->length = ((id3->filesize - id3->first_frame_offset) * 8) / id3->bitrate;
}
/* output header/id3 info (for debug) */ /* output header/id3 info (for debug) */
DEBUGF("%s header info ----\n", (is_64)? "wave64" : "wave"); DEBUGF("%s header info ----\n", (is_64)? "wave64" : "wave");
@ -335,10 +324,10 @@ static bool read_header(int fd, struct mp3entry* id3, const unsigned char **chun
bool get_wave_metadata(int fd, struct mp3entry* id3) bool get_wave_metadata(int fd, struct mp3entry* id3)
{ {
return read_header(fd, id3, (const unsigned char **)&wave_chunknames, false); return read_header(fd, id3, wave_chunklist, false);
} }
bool get_wave64_metadata(int fd, struct mp3entry* id3) bool get_wave64_metadata(int fd, struct mp3entry* id3)
{ {
return read_header(fd, id3, (const unsigned char **)&wave64_chunknames, true); return read_header(fd, id3, wave64_chunklist, true);
} }