* ID3v2 header parser
* Copyright (c) 2003 Fabrice Bellard
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "id3v2.h"
#include "id3v1.h"
#include "libavutil/avstring.h"
+#include "libavutil/intreadwrite.h"
+#include "metadata.h"
+#include "avio_internal.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' &&
+ return buf[0] == magic[0] &&
+ buf[1] == magic[1] &&
+ buf[2] == magic[2] &&
buf[3] != 0xff &&
buf[4] != 0xff &&
(buf[6] & 0x80) == 0 &&
return len;
}
-static unsigned int get_size(ByteIOContext *s, int len)
+static unsigned int get_size(AVIOContext *s, int len)
{
int v = 0;
while (len--)
- v = (v << 7) + (get_byte(s) & 0x7F);
+ v = (v << 7) + (avio_r8(s) & 0x7F);
return v;
}
-static void read_ttag(AVFormatContext *s, int taglen, const char *key)
+static void read_ttag(AVFormatContext *s, AVIOContext *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)(AVIOContext*) = avio_rb16;
dst[0] = 0;
if (taglen < 1)
taglen--; /* account for encoding type byte */
- switch (get_byte(s->pb)) { /* encoding type */
+ switch (avio_r8(pb)) { /* encoding type */
- case 0: /* ISO-8859-1 (0 - 255 maps directly into unicode) */
+ case ID3v2_ENCODING_ISO8859:
q = dst;
- while (taglen--) {
+ while (taglen-- && q - dst < dstlen - 7) {
uint8_t tmp;
- PUT_UTF8(get_byte(s->pb), tmp, if (q - dst < dstlen - 1) *q++ = tmp;)
+ PUT_UTF8(avio_r8(pb), tmp, *q++ = tmp;)
}
- *q = '\0';
+ *q = 0;
break;
- case 3: /* UTF-8 */
- len = FFMIN(taglen, dstlen - 1);
- get_buffer(s->pb, dst, len);
+ case ID3v2_ENCODING_UTF16BOM:
+ taglen -= 2;
+ switch (avio_rb16(pb)) {
+ case 0xfffe:
+ get = avio_rl16;
+ case 0xfeff:
+ break;
+ default:
+ av_log(s, AV_LOG_ERROR, "Incorrect BOM value in tag %s.\n", key);
+ return;
+ }
+ // fall-through
+
+ case ID3v2_ENCODING_UTF16BE:
+ 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 ID3v2_ENCODING_UTF8:
+ len = FFMIN(taglen, dstlen);
+ avio_read(pb, dst, len);
dst[len] = 0;
break;
+ default:
+ av_log(s, AV_LOG_WARNING, "Unknown encoding in tag %s.\n", key);
}
- if (!strcmp(key, "genre")
+ if (!(strcmp(key, "TCON") && strcmp(key, "TCO"))
&& (sscanf(dst, "(%d)", &genre) == 1 || sscanf(dst, "%d", &genre) == 1)
&& genre <= ID3v1_GENRE_MAX)
- av_strlcpy(dst, ff_id3v1_genre_str[genre], sizeof(dst));
+ 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, AV_METADATA_DONT_OVERWRITE);
+}
+
+static int is_number(const char *str)
+{
+ while (*str >= '0' && *str <= '9') str++;
+ return !*str;
+}
+
+static AVMetadataTag* get_date_tag(AVMetadata *m, const char *tag)
+{
+ AVMetadataTag *t;
+ if ((t = av_metadata_get(m, tag, NULL, AV_METADATA_MATCH_CASE)) &&
+ strlen(t->value) == 4 && is_number(t->value))
+ return t;
+ return NULL;
+}
+
+static void merge_date(AVMetadata **m)
+{
+ AVMetadataTag *t;
+ char date[17] = {0}; // YYYY-MM-DD hh:mm
- if (*dst)
- av_metadata_set(&s->metadata, key, dst);
+ if (!(t = get_date_tag(*m, "TYER")) &&
+ !(t = get_date_tag(*m, "TYE")))
+ return;
+ av_strlcpy(date, t->value, 5);
+ av_metadata_set2(m, "TYER", NULL, 0);
+ av_metadata_set2(m, "TYE", NULL, 0);
+
+ if (!(t = get_date_tag(*m, "TDAT")) &&
+ !(t = get_date_tag(*m, "TDA")))
+ goto finish;
+ snprintf(date + 4, sizeof(date) - 4, "-%.2s-%.2s", t->value + 2, t->value);
+ av_metadata_set2(m, "TDAT", NULL, 0);
+ av_metadata_set2(m, "TDA", NULL, 0);
+
+ if (!(t = get_date_tag(*m, "TIME")) &&
+ !(t = get_date_tag(*m, "TIM")))
+ goto finish;
+ snprintf(date + 10, sizeof(date) - 10, " %.2s:%.2s", t->value, t->value + 2);
+ av_metadata_set2(m, "TIME", NULL, 0);
+ av_metadata_set2(m, "TIM", NULL, 0);
+
+finish:
+ if (date[0])
+ av_metadata_set2(m, "date", date, 0);
}
-void ff_id3v2_parse(AVFormatContext *s, int len, uint8_t version, uint8_t flags)
+static void ff_id3v2_parse(AVFormatContext *s, int len, uint8_t version, uint8_t flags)
{
- int isv34, tlen;
- uint32_t tag;
- int64_t next;
+ int isv34, tlen, unsync;
+ char tag[5];
+ int64_t next, end = avio_tell(s->pb) + len;
int taghdrlen;
- const char *reason;
+ const char *reason = NULL;
+ AVIOContext pb;
+ unsigned char *buffer = NULL;
+ int buffer_size = 0;
switch (version) {
case 2:
goto error;
}
- if (flags & 0x80) {
- reason = "unsynchronization";
- 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));
+ avio_skip(s->pb, get_size(s->pb, 4));
while (len >= taghdrlen) {
+ unsigned int tflags;
+ int tunsync = 0;
+
if (isv34) {
- tag = get_be32(s->pb);
- tlen = get_size(s->pb, 4);
- get_be16(s->pb); /* flags */
+ avio_read(s->pb, tag, 4);
+ tag[4] = 0;
+ if(version==3){
+ tlen = avio_rb32(s->pb);
+ }else
+ tlen = get_size(s->pb, 4);
+ tflags = avio_rb16(s->pb);
+ tunsync = tflags & ID3v2_FLAG_UNSYNCH;
} else {
- tag = get_be24(s->pb);
- tlen = get_size(s->pb, 3);
+ avio_read(s->pb, tag, 3);
+ tag[3] = 0;
+ tlen = avio_rb24(s->pb);
}
- len -= taghdrlen + tlen;
-
- if (len < 0)
+ if (tlen < 0 || tlen > len - taghdrlen) {
+ av_log(s, AV_LOG_WARNING, "Invalid size in frame %s, skipping the rest of tag.\n", tag);
break;
+ }
+ len -= taghdrlen + tlen;
+ next = avio_tell(s->pb) + tlen;
- next = url_ftell(s->pb) + tlen;
+ if (tflags & ID3v2_FLAG_DATALEN) {
+ avio_rb32(s->pb);
+ tlen -= 4;
+ }
- switch (tag) {
- case MKBETAG('T', 'I', 'T', '2'):
- case MKBETAG(0, 'T', 'T', '2'):
- read_ttag(s, tlen, "title");
- break;
- case MKBETAG('T', 'P', 'E', '1'):
- case MKBETAG(0, 'T', 'P', '1'):
- read_ttag(s, tlen, "author");
- break;
- case MKBETAG('T', 'A', 'L', 'B'):
- case MKBETAG(0, 'T', 'A', 'L'):
- read_ttag(s, tlen, "album");
- break;
- case MKBETAG('T', 'C', 'O', 'N'):
- case MKBETAG(0, 'T', 'C', 'O'):
- read_ttag(s, tlen, "genre");
- break;
- case MKBETAG('T', 'C', 'O', 'P'):
- case MKBETAG(0, 'T', 'C', 'R'):
- read_ttag(s, tlen, "copyright");
- break;
- case MKBETAG('T', 'R', 'C', 'K'):
- case MKBETAG(0, 'T', 'R', 'K'):
- read_ttag(s, tlen, "track");
+ if (tflags & (ID3v2_FLAG_ENCRYPTION | ID3v2_FLAG_COMPRESSION)) {
+ av_log(s, AV_LOG_WARNING, "Skipping encrypted/compressed ID3v2 frame %s.\n", tag);
+ avio_skip(s->pb, tlen);
+ } else 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] = avio_r8(s->pb);
+ if (j > 0 && !buffer[j] && buffer[j - 1] == 0xff) {
+ /* Unsynchronised byte, skip it */
+ j--;
+ }
+ }
+ ffio_init_context(&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");
+ avio_skip(s->pb, tlen);
break;
- case 0:
- /* padding, skip to end */
- url_fskip(s->pb, len);
- len = 0;
- continue;
}
/* Skip to end of tag */
- url_fseek(s->pb, next, SEEK_SET);
+ avio_seek(s->pb, next, SEEK_SET);
}
if (version == 4 && flags & 0x10) /* Footer preset, always 10 bytes, skip over it */
- url_fskip(s->pb, 10);
- return;
+ end += 10;
error:
- av_log(s, AV_LOG_INFO, "ID3v2.%d tag skipped, cannot handle %s\n", version, reason);
- url_fskip(s->pb, len);
+ if (reason)
+ av_log(s, AV_LOG_INFO, "ID3v2.%d tag skipped, cannot handle %s\n", version, reason);
+ avio_seek(s->pb, end, SEEK_SET);
+ av_free(buffer);
+ return;
}
+
+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 = avio_tell(s->pb);
+ ret = avio_read(s->pb, buf, ID3v2_HEADER_SIZE);
+ if (ret != ID3v2_HEADER_SIZE)
+ break;
+ 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 {
+ avio_seek(s->pb, off, SEEK_SET);
+ }
+ } while (found_header);
+ ff_metadata_conv(&s->metadata, NULL, ff_id3v2_34_metadata_conv);
+ ff_metadata_conv(&s->metadata, NULL, ff_id3v2_2_metadata_conv);
+ ff_metadata_conv(&s->metadata, NULL, ff_id3v2_4_metadata_conv);
+ merge_date(&s->metadata);
+}
+
+const AVMetadataConv ff_id3v2_34_metadata_conv[] = {
+ { "TALB", "album"},
+ { "TCOM", "composer"},
+ { "TCON", "genre"},
+ { "TCOP", "copyright"},
+ { "TENC", "encoded_by"},
+ { "TIT2", "title"},
+ { "TLAN", "language"},
+ { "TPE1", "artist"},
+ { "TPE2", "album_artist"},
+ { "TPE3", "performer"},
+ { "TPOS", "disc"},
+ { "TPUB", "publisher"},
+ { "TRCK", "track"},
+ { "TSSE", "encoder"},
+ { 0 }
+};
+
+const AVMetadataConv ff_id3v2_4_metadata_conv[] = {
+ { "TDRL", "date"},
+ { "TDRC", "date"},
+ { "TDEN", "creation_time"},
+ { "TSOA", "album-sort"},
+ { "TSOP", "artist-sort"},
+ { "TSOT", "title-sort"},
+ { 0 }
+};
+
+const AVMetadataConv ff_id3v2_2_metadata_conv[] = {
+ { "TAL", "album"},
+ { "TCO", "genre"},
+ { "TT2", "title"},
+ { "TEN", "encoded_by"},
+ { "TP1", "artist"},
+ { "TP2", "album_artist"},
+ { "TP3", "performer"},
+ { "TRK", "track"},
+ { 0 }
+};
+
+
+const char ff_id3v2_tags[][4] = {
+ "TALB", "TBPM", "TCOM", "TCON", "TCOP", "TDLY", "TENC", "TEXT",
+ "TFLT", "TIT1", "TIT2", "TIT3", "TKEY", "TLAN", "TLEN", "TMED",
+ "TOAL", "TOFN", "TOLY", "TOPE", "TOWN", "TPE1", "TPE2", "TPE3",
+ "TPE4", "TPOS", "TPUB", "TRCK", "TRSN", "TRSO", "TSRC", "TSSE",
+ { 0 },
+};
+
+const char ff_id3v2_4_tags[][4] = {
+ "TDEN", "TDOR", "TDRC", "TDRL", "TDTG", "TIPL", "TMCL", "TMOO",
+ "TPRO", "TSOA", "TSOP", "TSOT", "TSST",
+ { 0 },
+};
+
+const char ff_id3v2_3_tags[][4] = {
+ "TDAT", "TIME", "TORY", "TRDA", "TSIZ", "TYER",
+ { 0 },
+};
projects / ffmpeg / blobdiff