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rockbox/apps/metadata/asf.c

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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
*
* $Id$
*
* Copyright (C) 2007 Dave Chapman
*
* 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 "metadata.h"
#include "replaygain.h"
#include "debug.h"
#include "rbunicode.h"
#include "metadata_common.h"
#include "metadata_parsers.h"
#include "system.h"
#include <codecs/libasf/asf.h>
/* TODO: Just read the GUIDs into a 16-byte array, and use memcmp to compare */
struct guid_s {
uint32_t v1;
uint16_t v2;
uint16_t v3;
uint8_t v4[8];
};
typedef struct guid_s guid_t;
struct asf_object_s {
guid_t guid;
uint64_t size;
uint64_t datalen;
};
typedef struct asf_object_s asf_object_t;
static const guid_t asf_guid_null =
{0x00000000, 0x0000, 0x0000, {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}};
/* top level object guids */
static const guid_t asf_guid_header =
{0x75B22630, 0x668E, 0x11CF, {0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C}};
static const guid_t asf_guid_data =
{0x75B22636, 0x668E, 0x11CF, {0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C}};
static const guid_t asf_guid_index =
{0x33000890, 0xE5B1, 0x11CF, {0x89, 0xF4, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xCB}};
/* header level object guids */
static const guid_t asf_guid_file_properties =
{0x8cabdca1, 0xa947, 0x11cf, {0x8E, 0xe4, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65}};
static const guid_t asf_guid_stream_properties =
{0xB7DC0791, 0xA9B7, 0x11CF, {0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65}};
static const guid_t asf_guid_content_description =
{0x75B22633, 0x668E, 0x11CF, {0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C}};
static const guid_t asf_guid_extended_content_description =
{0xD2D0A440, 0xE307, 0x11D2, {0x97, 0xF0, 0x00, 0xA0, 0xC9, 0x5E, 0xA8, 0x50}};
static const guid_t asf_guid_content_encryption =
{0x2211b3fb, 0xbd23, 0x11d2, {0xb4, 0xb7, 0x00, 0xa0, 0xc9, 0x55, 0xfc, 0x6e}};
static const guid_t asf_guid_extended_content_encryption =
{0x298ae614, 0x2622, 0x4c17, {0xb9, 0x35, 0xda, 0xe0, 0x7e, 0xe9, 0x28, 0x9c}};
/* stream type guids */
static const guid_t asf_guid_stream_type_audio =
{0xF8699E40, 0x5B4D, 0x11CF, {0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B}};
static int asf_guid_match(const guid_t *guid1, const guid_t *guid2)
{
if((guid1->v1 != guid2->v1) ||
(guid1->v2 != guid2->v2) ||
(guid1->v3 != guid2->v3) ||
(memcmp(guid1->v4, guid2->v4, 8))) {
return 0;
}
return 1;
}
/* Read the 16 byte GUID from a file */
static void asf_readGUID(int fd, guid_t* guid)
{
read_uint32le(fd, &guid->v1);
read_uint16le(fd, &guid->v2);
read_uint16le(fd, &guid->v3);
read(fd, guid->v4, 8);
}
static void asf_read_object_header(asf_object_t *obj, int fd)
{
asf_readGUID(fd, &obj->guid);
read_uint64le(fd, &obj->size);
obj->datalen = 0;
}
/* Parse an integer from the extended content object - we always
convert to an int, regardless of native format.
*/
static int asf_intdecode(int fd, int type, int length)
{
uint16_t tmp16;
uint32_t tmp32;
uint64_t tmp64;
if (type == 3) {
read_uint32le(fd, &tmp32);
lseek(fd,length - 4,SEEK_CUR);
return (int)tmp32;
} else if (type == 4) {
read_uint64le(fd, &tmp64);
lseek(fd,length - 8,SEEK_CUR);
return (int)tmp64;
} else if (type == 5) {
read_uint16le(fd, &tmp16);
lseek(fd,length - 2,SEEK_CUR);
return (int)tmp16;
}
return 0;
}
/* Decode a LE utf16 string from a disk buffer into a fixed-sized
utf8 buffer.
*/
static void asf_utf16LEdecode(int fd,
uint16_t utf16bytes,
unsigned char **utf8,
int* utf8bytes
)
{
unsigned long ucs;
int n;
unsigned char utf16buf[256];
unsigned char* utf16 = utf16buf;
unsigned char* newutf8;
n = read(fd, utf16buf, MIN(sizeof(utf16buf), utf16bytes));
utf16bytes -= n;
while (n > 0) {
/* Check for a surrogate pair */
if (utf16[1] >= 0xD8 && utf16[1] < 0xE0) {
if (n < 4) {
/* Run out of utf16 bytes, read some more */
utf16buf[0] = utf16[0];
utf16buf[1] = utf16[1];
n = read(fd, utf16buf + 2, MIN(sizeof(utf16buf)-2, utf16bytes));
utf16 = utf16buf;
utf16bytes -= n;
n += 2;
}
if (n < 4) {
/* Truncated utf16 string, abort */
break;
}
ucs = 0x10000 + ((utf16[0] << 10) | ((utf16[1] - 0xD8) << 18)
| utf16[2] | ((utf16[3] - 0xDC) << 8));
utf16 += 4;
n -= 4;
} else {
ucs = (utf16[0] | (utf16[1] << 8));
utf16 += 2;
n -= 2;
}
if (*utf8bytes > 6) {
newutf8 = utf8encode(ucs, *utf8);
*utf8bytes -= (newutf8 - *utf8);
*utf8 += (newutf8 - *utf8);
}
/* We have run out of utf16 bytes, read more if available */
if ((n == 0) && (utf16bytes > 0)) {
n = read(fd, utf16buf, MIN(sizeof(utf16buf), utf16bytes));
utf16 = utf16buf;
utf16bytes -= n;
}
}
*utf8[0] = 0;
--*utf8bytes;
if (utf16bytes > 0) {
/* Skip any remaining bytes */
lseek(fd, utf16bytes, SEEK_CUR);
}
return;
}
static int asf_parse_header(int fd, struct mp3entry* id3,
asf_waveformatex_t* wfx)
{
asf_object_t current;
asf_object_t header;
uint64_t datalen;
int i;
int fileprop = 0;
uint64_t play_duration;
uint16_t flags;
uint32_t subobjects;
uint8_t utf8buf[512];
int id3buf_remaining = sizeof(id3->id3v2buf) + sizeof(id3->id3v1buf);
unsigned char* id3buf = (unsigned char*)id3->id3v2buf;
asf_read_object_header((asf_object_t *) &header, fd);
//DEBUGF("header.size=%d\n",(int)header.size);
if (header.size < 30) {
/* invalid size for header object */
return ASF_ERROR_OBJECT_SIZE;
}
read_uint32le(fd, &subobjects);
/* Two reserved bytes - do we need to read them? */
lseek(fd, 2, SEEK_CUR);
//DEBUGF("Read header - size=%d, subobjects=%d\n",(int)header.size, (int)subobjects);
if (subobjects > 0) {
header.datalen = header.size - 30;
/* TODO: Check that we have datalen bytes left in the file */
datalen = header.datalen;
for (i=0; i<(int)subobjects; i++) {
//DEBUGF("Parsing header object %d - datalen=%d\n",i,(int)datalen);
if (datalen < 24) {
//DEBUGF("not enough data for reading object\n");
break;
}
asf_read_object_header(&current, fd);
if (current.size > datalen || current.size < 24) {
//DEBUGF("invalid object size - current.size=%d, datalen=%d\n",(int)current.size,(int)datalen);
break;
}
if (asf_guid_match(&current.guid, &asf_guid_file_properties)) {
if (current.size < 104)
return ASF_ERROR_OBJECT_SIZE;
if (fileprop) {
/* multiple file properties objects not allowed */
return ASF_ERROR_INVALID_OBJECT;
}
fileprop = 1;
/* Get the number of logical packets - uint16_t at offset 31
* (Big endian byte order) */
lseek(fd, 31, SEEK_CUR);
read_uint16be(fd, &wfx->numpackets);
/* Now get the play duration - uint64_t at offset 40 */
lseek(fd, 7, SEEK_CUR);
read_uint64le(fd, &play_duration);
id3->length = play_duration / 10000;
//DEBUGF("****** length = %lums\n", id3->length);
/* Read the packet size - uint32_t at offset 68 */
lseek(fd, 20, SEEK_CUR);
read_uint32le(fd, &wfx->packet_size);
/* Skip bytes remaining in object */
lseek(fd, current.size - 24 - 72, SEEK_CUR);
} else if (asf_guid_match(&current.guid, &asf_guid_stream_properties)) {
guid_t guid;
uint32_t propdatalen;
if (current.size < 78)
return ASF_ERROR_OBJECT_SIZE;
#if 0
asf_byteio_getGUID(&guid, current->data);
datalen = asf_byteio_getDWLE(current->data + 40);
flags = asf_byteio_getWLE(current->data + 48);
#endif
asf_readGUID(fd, &guid);
lseek(fd, 24, SEEK_CUR);
read_uint32le(fd, &propdatalen);
lseek(fd, 4, SEEK_CUR);
read_uint16le(fd, &flags);
if (!asf_guid_match(&guid, &asf_guid_stream_type_audio)) {
//DEBUGF("Found stream properties for non audio stream, skipping\n");
lseek(fd,current.size - 24 - 50,SEEK_CUR);
} else if (wfx->audiostream == -1) {
lseek(fd, 4, SEEK_CUR);
//DEBUGF("Found stream properties for audio stream %d\n",flags&0x7f);
if (propdatalen < 18) {
return ASF_ERROR_INVALID_LENGTH;
}
#if 0
if (asf_byteio_getWLE(data + 16) > datalen - 16) {
return ASF_ERROR_INVALID_LENGTH;
}
#endif
read_uint16le(fd, &wfx->codec_id);
read_uint16le(fd, &wfx->channels);
read_uint32le(fd, &wfx->rate);
read_uint32le(fd, &wfx->bitrate);
wfx->bitrate *= 8;
read_uint16le(fd, &wfx->blockalign);
read_uint16le(fd, &wfx->bitspersample);
read_uint16le(fd, &wfx->datalen);
/* Round bitrate to the nearest kbit */
id3->bitrate = (wfx->bitrate + 500) / 1000;
id3->frequency = wfx->rate;
if (wfx->codec_id == ASF_CODEC_ID_WMAV1) {
read(fd, wfx->data, 4);
lseek(fd,current.size - 24 - 72 - 4,SEEK_CUR);
wfx->audiostream = flags&0x7f;
} else if (wfx->codec_id == ASF_CODEC_ID_WMAV2) {
read(fd, wfx->data, 6);
lseek(fd,current.size - 24 - 72 - 6,SEEK_CUR);
wfx->audiostream = flags&0x7f;
} else if (wfx->codec_id == ASF_CODEC_ID_WMAPRO) {
/* wma pro decoder needs the extra-data */
read(fd, wfx->data, wfx->datalen);
lseek(fd,current.size - 24 - 72 - wfx->datalen,SEEK_CUR);
wfx->audiostream = flags&0x7f;
/* Correct codectype to redirect playback to the proper .codec */
id3->codectype = AFMT_WMAPRO;
} else if (wfx->codec_id == ASF_CODEC_ID_WMAVOICE) {
read(fd, wfx->data, wfx->datalen);
lseek(fd,current.size - 24 - 72 - wfx->datalen,SEEK_CUR);
wfx->audiostream = flags&0x7f;
id3->codectype = AFMT_WMAVOICE;
} else {
DEBUGF("Unsupported WMA codec (Lossless, Voice, etc)\n");
lseek(fd,current.size - 24 - 72,SEEK_CUR);
}
}
} else if (asf_guid_match(&current.guid, &asf_guid_content_description)) {
/* Object contains five 16-bit string lengths, followed by the five strings:
title, artist, copyright, description, rating
*/
uint16_t strlength[5];
int i;
//DEBUGF("Found GUID_CONTENT_DESCRIPTION - size=%d\n",(int)(current.size - 24));
/* Read the 5 string lengths - number of bytes included trailing zero */
for (i=0; i<5; i++) {
read_uint16le(fd, &strlength[i]);
//DEBUGF("strlength = %u\n",strlength[i]);
}
if (strlength[0] > 0) { /* 0 - Title */
id3->title = id3buf;
asf_utf16LEdecode(fd, strlength[0], &id3buf, &id3buf_remaining);
}
if (strlength[1] > 0) { /* 1 - Artist */
id3->artist = id3buf;
asf_utf16LEdecode(fd, strlength[1], &id3buf, &id3buf_remaining);
}
lseek(fd, strlength[2], SEEK_CUR); /* 2 - copyright */
if (strlength[3] > 0) { /* 3 - description */
id3->comment = id3buf;
asf_utf16LEdecode(fd, strlength[3], &id3buf, &id3buf_remaining);
}
lseek(fd, strlength[4], SEEK_CUR); /* 4 - rating */
} else if (asf_guid_match(&current.guid, &asf_guid_extended_content_description)) {
uint16_t count;
int i;
int bytesleft = current.size - 24;
//DEBUGF("Found GUID_EXTENDED_CONTENT_DESCRIPTION\n");
read_uint16le(fd, &count);
bytesleft -= 2;
//DEBUGF("extended metadata count = %u\n",count);
for (i=0; i < count; i++) {
uint16_t length, type;
unsigned char* utf8 = utf8buf;
int utf8length = 512;
read_uint16le(fd, &length);
asf_utf16LEdecode(fd, length, &utf8, &utf8length);
bytesleft -= 2 + length;
read_uint16le(fd, &type);
read_uint16le(fd, &length);
if (!strcmp("WM/TrackNumber",utf8buf)) {
if (type == 0) {
id3->track_string = id3buf;
asf_utf16LEdecode(fd, length, &id3buf, &id3buf_remaining);
id3->tracknum = atoi(id3->track_string);
} else if ((type >=2) && (type <= 5)) {
id3->tracknum = asf_intdecode(fd, type, length);
} else {
lseek(fd, length, SEEK_CUR);
}
} else if ((!strcmp("WM/Genre", utf8buf)) && (type == 0)) {
id3->genre_string = id3buf;
asf_utf16LEdecode(fd, length, &id3buf, &id3buf_remaining);
} else if ((!strcmp("WM/AlbumTitle", utf8buf)) && (type == 0)) {
id3->album = id3buf;
asf_utf16LEdecode(fd, length, &id3buf, &id3buf_remaining);
} else if ((!strcmp("WM/AlbumArtist", utf8buf)) && (type == 0)) {
id3->albumartist = id3buf;
asf_utf16LEdecode(fd, length, &id3buf, &id3buf_remaining);
} else if ((!strcmp("WM/Composer", utf8buf)) && (type == 0)) {
id3->composer = id3buf;
asf_utf16LEdecode(fd, length, &id3buf, &id3buf_remaining);
} else if (!strcmp("WM/Year", utf8buf)) {
if (type == 0) {
id3->year_string = id3buf;
asf_utf16LEdecode(fd, length, &id3buf, &id3buf_remaining);
id3->year = atoi(id3->year_string);
} else if ((type >=2) && (type <= 5)) {
id3->year = asf_intdecode(fd, type, length);
} else {
lseek(fd, length, SEEK_CUR);
}
} else if (!strncmp("replaygain_", utf8buf, 11)) {
char* value = id3buf;
int buf_len = id3buf_remaining;
int len;
asf_utf16LEdecode(fd, length, &id3buf, &id3buf_remaining);
len = parse_replaygain(utf8buf, value, id3,
value, buf_len);
if (len == 0) {
/* Don't need to keep the value */
id3buf = value;
id3buf_remaining = buf_len;
}
} else if (!strcmp("MusicBrainz/Track Id", utf8buf)) {
id3->mb_track_id = id3buf;
asf_utf16LEdecode(fd, length, &id3buf, &id3buf_remaining);
} else {
lseek(fd, length, SEEK_CUR);
}
bytesleft -= 4 + length;
}
lseek(fd, bytesleft, SEEK_CUR);
} else if (asf_guid_match(&current.guid, &asf_guid_content_encryption)
|| asf_guid_match(&current.guid, &asf_guid_extended_content_encryption)) {
//DEBUGF("File is encrypted\n");
return ASF_ERROR_ENCRYPTED;
} else {
//DEBUGF("Skipping %d bytes of object\n",(int)(current.size - 24));
lseek(fd,current.size - 24,SEEK_CUR);
}
//DEBUGF("Parsed object - size = %d\n",(int)current.size);
datalen -= current.size;
}
if (i != (int)subobjects || datalen != 0) {
//DEBUGF("header data doesn't match given subobject count\n");
return ASF_ERROR_INVALID_VALUE;
}
//DEBUGF("%d subobjects read successfully\n", i);
}
#if 0
tmp = asf_parse_header_validate(file, &header);
if (tmp < 0) {
/* header read ok but doesn't validate correctly */
return tmp;
}
#endif
//DEBUGF("header validated correctly\n");
return 0;
}
bool get_asf_metadata(int fd, struct mp3entry* id3)
{
int res;
asf_object_t obj;
asf_waveformatex_t wfx;
wfx.audiostream = -1;
res = asf_parse_header(fd, id3, &wfx);
if (res < 0) {
DEBUGF("ASF: parsing error - %d\n",res);
return false;
}
if (wfx.audiostream == -1) {
DEBUGF("ASF: No WMA streams found\n");
return false;
}
asf_read_object_header(&obj, fd);
if (!asf_guid_match(&obj.guid, &asf_guid_data)) {
DEBUGF("ASF: No data object found\n");
return false;
}
/* Store the current file position - no need to parse the header
again in the codec. The +26 skips the rest of the data object
header.
*/
id3->first_frame_offset = lseek(fd, 0, SEEK_CUR) + 26;
id3->filesize = filesize(fd);
/* We copy the wfx struct to the MP3 TOC field in the id3 struct so
the codec doesn't need to parse the header object again */
memcpy(id3->toc, &wfx, sizeof(wfx));
return true;
}
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