*/
#include "id3v2.h"
+#include "id3v1.h"
+#include "libavutil/avstring.h"
+#include "libavutil/intreadwrite.h"
+#include "metadata.h"
-int ff_id3v2_match(const uint8_t *buf)
+int ff_id3v2_match(const uint8_t *buf, const char * magic)
{
- return buf[0] == 'I' &&
- buf[1] == 'D' &&
- buf[2] == '3' &&
- buf[3] != 0xff &&
- buf[4] != 0xff &&
- (buf[6] & 0x80) == 0 &&
- (buf[7] & 0x80) == 0 &&
- (buf[8] & 0x80) == 0 &&
- (buf[9] & 0x80) == 0;
+ return buf[0] == magic[0] &&
+ buf[1] == magic[1] &&
+ buf[2] == magic[2] &&
+ buf[3] != 0xff &&
+ buf[4] != 0xff &&
+ (buf[6] & 0x80) == 0 &&
+ (buf[7] & 0x80) == 0 &&
+ (buf[8] & 0x80) == 0 &&
+ (buf[9] & 0x80) == 0;
}
int ff_id3v2_tag_len(const uint8_t * buf)
{
int len = ((buf[6] & 0x7f) << 21) +
- ((buf[7] & 0x7f) << 14) +
- ((buf[8] & 0x7f) << 7) +
- (buf[9] & 0x7f) +
- ID3v2_HEADER_SIZE;
+ ((buf[7] & 0x7f) << 14) +
+ ((buf[8] & 0x7f) << 7) +
+ (buf[9] & 0x7f) +
+ ID3v2_HEADER_SIZE;
if (buf[5] & 0x10)
len += ID3v2_HEADER_SIZE;
return len;
}
+
+void ff_id3v2_read(AVFormatContext *s, const char *magic)
+{
+ int len, ret;
+ uint8_t buf[ID3v2_HEADER_SIZE];
+ int found_header;
+ int64_t off;
+
+ do {
+ /* save the current offset in case there's nothing to read/skip */
+ off = url_ftell(s->pb);
+ ret = get_buffer(s->pb, buf, ID3v2_HEADER_SIZE);
+ if (ret != ID3v2_HEADER_SIZE)
+ return;
+ found_header = ff_id3v2_match(buf, magic);
+ if (found_header) {
+ /* parse ID3v2 header */
+ len = ((buf[6] & 0x7f) << 21) |
+ ((buf[7] & 0x7f) << 14) |
+ ((buf[8] & 0x7f) << 7) |
+ (buf[9] & 0x7f);
+ ff_id3v2_parse(s, len, buf[3], buf[5]);
+ } else {
+ url_fseek(s->pb, off, SEEK_SET);
+ }
+ } while (found_header);
+}
+
+static unsigned int get_size(ByteIOContext *s, int len)
+{
+ int v = 0;
+ while (len--)
+ v = (v << 7) + (get_byte(s) & 0x7F);
+ return v;
+}
+
+static void read_ttag(AVFormatContext *s, ByteIOContext *pb, int taglen, const char *key)
+{
+ char *q, dst[512];
+ const char *val = NULL;
+ int len, dstlen = sizeof(dst) - 1;
+ unsigned genre;
+ unsigned int (*get)(ByteIOContext*) = get_be16;
+
+ dst[0] = 0;
+ if (taglen < 1)
+ return;
+
+ taglen--; /* account for encoding type byte */
+
+ switch (get_byte(pb)) { /* encoding type */
+
+ case 0: /* ISO-8859-1 (0 - 255 maps directly into unicode) */
+ q = dst;
+ while (taglen-- && q - dst < dstlen - 7) {
+ uint8_t tmp;
+ PUT_UTF8(get_byte(pb), tmp, *q++ = tmp;)
+ }
+ *q = 0;
+ break;
+
+ case 1: /* UTF-16 with BOM */
+ taglen -= 2;
+ switch (get_be16(pb)) {
+ case 0xfffe:
+ get = get_le16;
+ case 0xfeff:
+ break;
+ default:
+ av_log(s, AV_LOG_ERROR, "Incorrect BOM value in tag %s.\n", key);
+ return;
+ }
+ // fall-through
+
+ case 2: /* UTF-16BE without BOM */
+ q = dst;
+ while (taglen > 1 && q - dst < dstlen - 7) {
+ uint32_t ch;
+ uint8_t tmp;
+
+ GET_UTF16(ch, ((taglen -= 2) >= 0 ? get(pb) : 0), break;)
+ PUT_UTF8(ch, tmp, *q++ = tmp;)
+ }
+ *q = 0;
+ break;
+
+ case 3: /* UTF-8 */
+ len = FFMIN(taglen, dstlen);
+ get_buffer(pb, dst, len);
+ dst[len] = 0;
+ break;
+ default:
+ av_log(s, AV_LOG_WARNING, "Unknown encoding in tag %s\n.", key);
+ }
+
+ if (!(strcmp(key, "TCON") && strcmp(key, "TCO"))
+ && (sscanf(dst, "(%d)", &genre) == 1 || sscanf(dst, "%d", &genre) == 1)
+ && genre <= ID3v1_GENRE_MAX)
+ val = ff_id3v1_genre_str[genre];
+ else if (!(strcmp(key, "TXXX") && strcmp(key, "TXX"))) {
+ /* dst now contains two 0-terminated strings */
+ dst[dstlen] = 0;
+ len = strlen(dst);
+ key = dst;
+ val = dst + FFMIN(len + 1, dstlen);
+ }
+ else if (*dst)
+ val = dst;
+
+ if (val)
+ av_metadata_set2(&s->metadata, key, val, 0);
+}
+
+void ff_id3v2_parse(AVFormatContext *s, int len, uint8_t version, uint8_t flags)
+{
+ int isv34, tlen, unsync;
+ char tag[5];
+ int64_t next;
+ int taghdrlen;
+ const char *reason;
+ ByteIOContext pb;
+ unsigned char *buffer = NULL;
+ int buffer_size = 0;
+
+ switch (version) {
+ case 2:
+ if (flags & 0x40) {
+ reason = "compression";
+ goto error;
+ }
+ isv34 = 0;
+ taghdrlen = 6;
+ break;
+
+ case 3:
+ case 4:
+ isv34 = 1;
+ taghdrlen = 10;
+ break;
+
+ default:
+ reason = "version";
+ goto error;
+ }
+
+ unsync = flags & 0x80;
+
+ if (isv34 && flags & 0x40) /* Extended header present, just skip over it */
+ url_fskip(s->pb, get_size(s->pb, 4));
+
+ while (len >= taghdrlen) {
+ unsigned int tflags;
+ int tunsync = 0;
+
+ if (isv34) {
+ get_buffer(s->pb, tag, 4);
+ tag[4] = 0;
+ if(version==3){
+ tlen = get_be32(s->pb);
+ }else
+ tlen = get_size(s->pb, 4);
+ tflags = get_be16(s->pb);
+ tunsync = tflags & 0x02;
+ } else {
+ get_buffer(s->pb, tag, 3);
+ tag[3] = 0;
+ tlen = get_be24(s->pb);
+ }
+ len -= taghdrlen + tlen;
+
+ if (len < 0)
+ break;
+
+ next = url_ftell(s->pb) + tlen;
+
+ if (tag[0] == 'T') {
+ if (unsync || tunsync) {
+ int i, j;
+ av_fast_malloc(&buffer, &buffer_size, tlen);
+ for (i = 0, j = 0; i < tlen; i++, j++) {
+ buffer[j] = get_byte(s->pb);
+ if (j > 0 && !buffer[j] && buffer[j - 1] == 0xff) {
+ /* Unsynchronised byte, skip it */
+ j--;
+ }
+ }
+ init_put_byte(&pb, buffer, j, 0, NULL, NULL, NULL, NULL);
+ read_ttag(s, &pb, j, tag);
+ } else {
+ read_ttag(s, s->pb, tlen, tag);
+ }
+ }
+ else if (!tag[0]) {
+ if (tag[1])
+ av_log(s, AV_LOG_WARNING, "invalid frame id, assuming padding");
+ url_fskip(s->pb, tlen);
+ break;
+ }
+ /* Skip to end of tag */
+ url_fseek(s->pb, next, SEEK_SET);
+ }
+ ff_metadata_conv(&s->metadata, NULL, ff_id3v2_metadata_conv);
+
+ if (len > 0) {
+ /* Skip padding */
+ url_fskip(s->pb, len);
+ }
+ if (version == 4 && flags & 0x10) /* Footer preset, always 10 bytes, skip over it */
+ url_fskip(s->pb, 10);
+
+ av_free(buffer);
+ return;
+
+ error:
+ av_log(s, AV_LOG_INFO, "ID3v2.%d tag skipped, cannot handle %s\n", version, reason);
+ url_fskip(s->pb, len);
+ av_free(buffer);
+}
+
+const AVMetadataConv ff_id3v2_metadata_conv[] = {
+ { "TALB", "album"},
+ { "TAL", "album"},
+ { "TCOM", "composer"},
+ { "TCON", "genre"},
+ { "TCO", "genre"},
+ { "TCOP", "copyright"},
+ { "TDRL", "date"},
+ { "TDRC", "date"},
+ { "TENC", "encoded_by"},
+ { "TEN", "encoded_by"},
+ { "TIT2", "title"},
+ { "TT2", "title"},
+ { "TLAN", "language"},
+ { "TPE1", "artist"},
+ { "TP1", "artist"},
+ { "TPE2", "album_artist"},
+ { "TP2", "album_artist"},
+ { "TPE3", "performer"},
+ { "TP3", "performer"},
+ { "TPOS", "disc"},
+ { "TPUB", "publisher"},
+ { "TRCK", "track"},
+ { "TRK", "track"},
+ { "TSOA", "album-sort"},
+ { "TSOP", "artist-sort"},
+ { "TSOT", "title-sort"},
+ { "TSSE", "encoder"},
+ { 0 }
+};
+
+const char ff_id3v2_tags[][4] = {
+ "TALB", "TBPM", "TCOM", "TCON", "TCOP", "TDEN", "TDLY", "TDOR", "TDRC",
+ "TDRL", "TDTG", "TENC", "TEXT", "TFLT", "TIPL", "TIT1", "TIT2", "TIT3",
+ "TKEY", "TLAN", "TLEN", "TMCL", "TMED", "TMOO", "TOAL", "TOFN", "TOLY",
+ "TOPE", "TOWN", "TPE1", "TPE2", "TPE3", "TPE4", "TPOS", "TPRO", "TPUB",
+ "TRCK", "TRSN", "TRSO", "TSOA", "TSOP", "TSOT", "TSRC", "TSSE", "TSST",
+ { 0 },
+};
projects / ffmpeg / blobdiff