forked from len0rd/rockbox
wave/wave64 LIST chunk parser
- logic simplify - tag data always ends by the '\0' terminate. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25911 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Yoshihisa Uchida
parent
52a8a540b1
commit
20eb5f48e5
1 changed files with 40 additions and 88 deletions
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@ -76,35 +76,29 @@ static const unsigned char *wave64_chunklist
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"data\xf3\xac\xd3\x11\x8c\xd1\x00\xc0\x4f\x8e\xdb\x8a"
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"\xbc\x94\x5f\x92\x5a\x52\xd2\x11\x86\xdc\x00\xc0\x4f\x8e\xdb\x8a";
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enum {
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INFO_TITLE = 0,
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INFO_ARTIST,
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INFO_ALBUM_ARTIST,
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INFO_ALBUM,
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INFO_COMPOSER,
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INFO_COMMENT,
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INFO_GROUPING,
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INFO_GENRE,
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INFO_DATE,
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INFO_TRACK,
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INFO_DISC,
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/* list/info chunk */
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struct info_chunk {
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const unsigned char* tag;
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size_t offset;
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};
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/* info chunk names are common wave/wave64 */
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static const unsigned char infochunk_list[][4]
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= {
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"INAM", /* title */
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"IART", /* artist */
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"ISBJ", /* albumartist */
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"IPRD", /* album */
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"IWRI", /* composer */
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"ICMT", /* comment */
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"ISRF", /* grouping */
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"IGNR", /* genre */
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"ICRD", /* date */
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"IPRT", /* track/trackcount */
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"IFRM", /* disc/disccount */
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};
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static const struct info_chunk info_chunks[] = {
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{ "INAM", offsetof(struct mp3entry, title), }, /* title */
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{ "IART", offsetof(struct mp3entry, artist), }, /* artist */
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{ "ISBJ", offsetof(struct mp3entry, albumartist), }, /* albumartist */
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{ "IPRD", offsetof(struct mp3entry, album), }, /* album */
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{ "IWRI", offsetof(struct mp3entry, composer), }, /* composer */
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{ "ICMT", offsetof(struct mp3entry, comment), }, /* comment */
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{ "ISRF", offsetof(struct mp3entry, grouping), }, /* grouping */
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{ "IGNR", offsetof(struct mp3entry, genre_string), }, /* genre */
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{ "ICRD", offsetof(struct mp3entry, year_string), }, /* date */
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{ "IPRT", offsetof(struct mp3entry, track_string), }, /* track/trackcount */
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{ "IFRM", offsetof(struct mp3entry, disc_string), }, /* disc/disccount */
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};
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#define INFO_CHUNK_COUNT ((int)ARRAYLEN(info_chunks))
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/* support formats */
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enum
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@ -135,11 +129,9 @@ struct wave_fmt {
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uint64_t numbytes;
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};
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static unsigned char *convert_utf8(unsigned char *src, unsigned char *dst,
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int datasize, int bufsize, bool is_64)
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static unsigned char *convert_utf8(const unsigned char *src, unsigned char *dst,
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int size, bool is_64)
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{
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int size = (datasize > bufsize)? bufsize : datasize;
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if (is_64)
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{
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/* Note: wave64: metadata codepage is UTF-16 only */
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@ -243,90 +235,50 @@ static void parse_riff_format(unsigned char* buf, int fmtsize, struct wave_fmt *
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}
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}
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static bool parse_list_chunk(int fd, struct mp3entry* id3, int chunksize, bool is_64)
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static void parse_list_chunk(int fd, struct mp3entry* id3, int chunksize, bool is_64)
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{
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unsigned char tmpbuf[ID3V2_BUF_SIZE];
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unsigned char *bp = tmpbuf;
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unsigned char *endp;
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unsigned char *data_pos;
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unsigned char *curpos = id3->id3v2buf;
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unsigned char *tag_pos = id3->id3v2buf;
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int datasize;
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int infosize;
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int remain = ID3V2_BUF_SIZE;
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bool convert_string;
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int remain;
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int i;
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if (is_64)
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lseek(fd, 4, SEEK_CUR);
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else if (read(fd, bp, 4) < 4 || memcmp(bp, "INFO", 4))
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return false;
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return;
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infosize = read(fd, bp, (ID3V2_BUF_SIZE > chunksize)? chunksize : ID3V2_BUF_SIZE);
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if (infosize <= 8)
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return false;
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return;
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endp = bp + infosize;
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while (bp < endp)
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{
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convert_string = true;
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datasize = get_long_le(bp + 4);
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data_pos = bp + 8;
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remain = ID3V2_BUF_SIZE - (curpos - (unsigned char*)id3->id3v2buf);
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if (remain <= 0)
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remain = ID3V2_BUF_SIZE - (tag_pos - (unsigned char*)id3->id3v2buf);
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if (remain < 1)
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break;
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if (memcmp(bp, infochunk_list[INFO_TITLE], 4) == 0)
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for (i = 0; i < INFO_CHUNK_COUNT; i++)
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{
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id3->title = curpos;
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if (memcmp(bp, info_chunks[i].tag, 4) == 0)
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{
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*((char **)(((char*)id3) + info_chunks[i].offset)) = tag_pos;
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tag_pos = convert_utf8(data_pos, tag_pos,
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(datasize + 1 >= remain )? remain - 1 : datasize,
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is_64);
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*tag_pos++ = 0;
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break;
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}
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}
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else if (memcmp(bp, infochunk_list[INFO_ARTIST], 4) == 0)
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{
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id3->artist = curpos;
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}
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else if (memcmp(bp, infochunk_list[INFO_ALBUM_ARTIST], 4) == 0)
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{
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id3->albumartist = curpos;
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}
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else if (memcmp(bp, infochunk_list[INFO_COMPOSER], 4) == 0)
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{
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id3->composer = curpos;
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}
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else if (memcmp(bp, infochunk_list[INFO_COMMENT], 4) == 0)
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{
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id3->comment = curpos;
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}
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else if (memcmp(bp, infochunk_list[INFO_GROUPING], 4) == 0)
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{
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id3->grouping = curpos;
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}
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else if (memcmp(bp, infochunk_list[INFO_GENRE], 4) == 0)
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{
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id3->genre_string = curpos;
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}
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else if (memcmp(bp, infochunk_list[INFO_DATE], 4) == 0)
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{
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id3->year_string = curpos;
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}
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else if (memcmp(bp, infochunk_list[INFO_TRACK], 4) == 0)
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{
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id3->track_string = curpos;
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}
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else if (memcmp(bp, infochunk_list[INFO_DISC], 4) == 0)
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{
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id3->disc_string = curpos;
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}
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else
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{
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convert_string = false;
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}
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if (convert_string)
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{
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curpos = convert_utf8(data_pos, curpos, datasize, remain, is_64);
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}
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bp = data_pos + datasize + (datasize & 1);
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};
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return true;
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}
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static bool read_header(int fd, struct mp3entry* id3, const unsigned char *chunknames,
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