mirror of
https://github.com/xenia-project/FFmpeg.git
synced 2024-12-05 01:56:41 +00:00
9ae80e6a9c
Current code would incorrectly process e.g. 'ff 00 ff 00 ff' to 'ff ff ff', while it should be 'ff ff 00 ff'. Fixes Bug 395. CC: libav-stable@libav.org
749 lines
21 KiB
C
749 lines
21 KiB
C
/*
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* ID3v2 header parser
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* Copyright (c) 2003 Fabrice Bellard
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "id3v2.h"
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#include "id3v1.h"
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#include "libavutil/avstring.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/dict.h"
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#include "avio_internal.h"
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#include "internal.h"
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const AVMetadataConv ff_id3v2_34_metadata_conv[] = {
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{ "TALB", "album"},
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{ "TCOM", "composer"},
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{ "TCON", "genre"},
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{ "TCOP", "copyright"},
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{ "TENC", "encoded_by"},
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{ "TIT2", "title"},
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{ "TLAN", "language"},
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{ "TPE1", "artist"},
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{ "TPE2", "album_artist"},
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{ "TPE3", "performer"},
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{ "TPOS", "disc"},
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{ "TPUB", "publisher"},
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{ "TRCK", "track"},
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{ "TSSE", "encoder"},
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{ 0 }
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};
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const AVMetadataConv ff_id3v2_4_metadata_conv[] = {
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{ "TDRL", "date"},
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{ "TDRC", "date"},
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{ "TDEN", "creation_time"},
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{ "TSOA", "album-sort"},
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{ "TSOP", "artist-sort"},
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{ "TSOT", "title-sort"},
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{ 0 }
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};
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static const AVMetadataConv id3v2_2_metadata_conv[] = {
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{ "TAL", "album"},
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{ "TCO", "genre"},
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{ "TT2", "title"},
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{ "TEN", "encoded_by"},
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{ "TP1", "artist"},
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{ "TP2", "album_artist"},
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{ "TP3", "performer"},
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{ "TRK", "track"},
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{ 0 }
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};
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const char ff_id3v2_tags[][4] = {
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"TALB", "TBPM", "TCOM", "TCON", "TCOP", "TDLY", "TENC", "TEXT",
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"TFLT", "TIT1", "TIT2", "TIT3", "TKEY", "TLAN", "TLEN", "TMED",
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"TOAL", "TOFN", "TOLY", "TOPE", "TOWN", "TPE1", "TPE2", "TPE3",
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"TPE4", "TPOS", "TPUB", "TRCK", "TRSN", "TRSO", "TSRC", "TSSE",
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{ 0 },
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};
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const char ff_id3v2_4_tags[][4] = {
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"TDEN", "TDOR", "TDRC", "TDRL", "TDTG", "TIPL", "TMCL", "TMOO",
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"TPRO", "TSOA", "TSOP", "TSOT", "TSST",
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{ 0 },
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};
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const char ff_id3v2_3_tags[][4] = {
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"TDAT", "TIME", "TORY", "TRDA", "TSIZ", "TYER",
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{ 0 },
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};
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const char *ff_id3v2_picture_types[21] = {
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"Other",
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"32x32 pixels 'file icon'",
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"Other file icon",
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"Cover (front)",
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"Cover (back)",
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"Leaflet page",
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"Media (e.g. label side of CD)",
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"Lead artist/lead performer/soloist",
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"Artist/performer",
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"Conductor",
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"Band/Orchestra",
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"Composer",
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"Lyricist/text writer",
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"Recording Location",
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"During recording",
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"During performance",
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"Movie/video screen capture",
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"A bright coloured fish",
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"Illustration",
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"Band/artist logotype",
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"Publisher/Studio logotype",
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};
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const CodecMime ff_id3v2_mime_tags[] = {
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{"image/gif" , AV_CODEC_ID_GIF},
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{"image/jpeg", AV_CODEC_ID_MJPEG},
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{"image/jpg", AV_CODEC_ID_MJPEG},
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{"image/png" , AV_CODEC_ID_PNG},
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{"image/tiff", AV_CODEC_ID_TIFF},
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{"image/bmp", AV_CODEC_ID_BMP},
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{"JPG", AV_CODEC_ID_MJPEG}, /* ID3v2.2 */
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{"PNG" , AV_CODEC_ID_PNG}, /* ID3v2.2 */
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{"", AV_CODEC_ID_NONE},
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};
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int ff_id3v2_match(const uint8_t *buf, const char * magic)
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{
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return buf[0] == magic[0] &&
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buf[1] == magic[1] &&
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buf[2] == magic[2] &&
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buf[3] != 0xff &&
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buf[4] != 0xff &&
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(buf[6] & 0x80) == 0 &&
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(buf[7] & 0x80) == 0 &&
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(buf[8] & 0x80) == 0 &&
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(buf[9] & 0x80) == 0;
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}
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int ff_id3v2_tag_len(const uint8_t * buf)
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{
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int len = ((buf[6] & 0x7f) << 21) +
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((buf[7] & 0x7f) << 14) +
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((buf[8] & 0x7f) << 7) +
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(buf[9] & 0x7f) +
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ID3v2_HEADER_SIZE;
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if (buf[5] & 0x10)
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len += ID3v2_HEADER_SIZE;
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return len;
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}
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static unsigned int get_size(AVIOContext *s, int len)
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{
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int v = 0;
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while (len--)
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v = (v << 7) + (avio_r8(s) & 0x7F);
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return v;
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}
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/**
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* Free GEOB type extra metadata.
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*/
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static void free_geobtag(void *obj)
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{
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ID3v2ExtraMetaGEOB *geob = obj;
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av_free(geob->mime_type);
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av_free(geob->file_name);
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av_free(geob->description);
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av_free(geob->data);
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av_free(geob);
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}
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/**
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* Decode characters to UTF-8 according to encoding type. The decoded buffer is
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* always null terminated. Stop reading when either *maxread bytes are read from
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* pb or U+0000 character is found.
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*
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* @param dst Pointer where the address of the buffer with the decoded bytes is
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* stored. Buffer must be freed by caller.
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* @param maxread Pointer to maximum number of characters to read from the
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* AVIOContext. After execution the value is decremented by the number of bytes
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* actually read.
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* @returns 0 if no error occurred, dst is uninitialized on error
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*/
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static int decode_str(AVFormatContext *s, AVIOContext *pb, int encoding,
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uint8_t **dst, int *maxread)
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{
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int ret;
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uint8_t tmp;
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uint32_t ch = 1;
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int left = *maxread;
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unsigned int (*get)(AVIOContext*) = avio_rb16;
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AVIOContext *dynbuf;
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if ((ret = avio_open_dyn_buf(&dynbuf)) < 0) {
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av_log(s, AV_LOG_ERROR, "Error opening memory stream\n");
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return ret;
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}
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switch (encoding) {
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case ID3v2_ENCODING_ISO8859:
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while (left && ch) {
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ch = avio_r8(pb);
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PUT_UTF8(ch, tmp, avio_w8(dynbuf, tmp);)
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left--;
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}
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break;
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case ID3v2_ENCODING_UTF16BOM:
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if ((left -= 2) < 0) {
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av_log(s, AV_LOG_ERROR, "Cannot read BOM value, input too short\n");
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avio_close_dyn_buf(dynbuf, dst);
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av_freep(dst);
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return AVERROR_INVALIDDATA;
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}
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switch (avio_rb16(pb)) {
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case 0xfffe:
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get = avio_rl16;
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case 0xfeff:
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break;
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default:
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av_log(s, AV_LOG_ERROR, "Incorrect BOM value\n");
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avio_close_dyn_buf(dynbuf, dst);
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av_freep(dst);
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*maxread = left;
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return AVERROR_INVALIDDATA;
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}
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// fall-through
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case ID3v2_ENCODING_UTF16BE:
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while ((left > 1) && ch) {
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GET_UTF16(ch, ((left -= 2) >= 0 ? get(pb) : 0), break;)
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PUT_UTF8(ch, tmp, avio_w8(dynbuf, tmp);)
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}
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if (left < 0)
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left += 2; /* did not read last char from pb */
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break;
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case ID3v2_ENCODING_UTF8:
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while (left && ch) {
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ch = avio_r8(pb);
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avio_w8(dynbuf, ch);
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left--;
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}
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break;
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default:
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av_log(s, AV_LOG_WARNING, "Unknown encoding\n");
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}
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if (ch)
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avio_w8(dynbuf, 0);
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avio_close_dyn_buf(dynbuf, dst);
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*maxread = left;
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return 0;
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}
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/**
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* Parse a text tag.
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*/
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static void read_ttag(AVFormatContext *s, AVIOContext *pb, int taglen, const char *key)
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{
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uint8_t *dst;
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int encoding, dict_flags = AV_DICT_DONT_OVERWRITE | AV_DICT_DONT_STRDUP_VAL;
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unsigned genre;
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if (taglen < 1)
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return;
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encoding = avio_r8(pb);
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taglen--; /* account for encoding type byte */
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if (decode_str(s, pb, encoding, &dst, &taglen) < 0) {
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av_log(s, AV_LOG_ERROR, "Error reading frame %s, skipped\n", key);
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return;
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}
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if (!(strcmp(key, "TCON") && strcmp(key, "TCO"))
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&& (sscanf(dst, "(%d)", &genre) == 1 || sscanf(dst, "%d", &genre) == 1)
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&& genre <= ID3v1_GENRE_MAX) {
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av_freep(&dst);
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dst = av_strdup(ff_id3v1_genre_str[genre]);
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} else if (!(strcmp(key, "TXXX") && strcmp(key, "TXX"))) {
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/* dst now contains the key, need to get value */
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key = dst;
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if (decode_str(s, pb, encoding, &dst, &taglen) < 0) {
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av_log(s, AV_LOG_ERROR, "Error reading frame %s, skipped\n", key);
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av_freep(&key);
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return;
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}
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dict_flags |= AV_DICT_DONT_STRDUP_KEY;
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} else if (!*dst)
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av_freep(&dst);
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if (dst)
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av_dict_set(&s->metadata, key, dst, dict_flags);
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}
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/**
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* Parse GEOB tag into a ID3v2ExtraMetaGEOB struct.
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*/
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static void read_geobtag(AVFormatContext *s, AVIOContext *pb, int taglen, char *tag, ID3v2ExtraMeta **extra_meta)
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{
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ID3v2ExtraMetaGEOB *geob_data = NULL;
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ID3v2ExtraMeta *new_extra = NULL;
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char encoding;
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unsigned int len;
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if (taglen < 1)
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return;
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geob_data = av_mallocz(sizeof(ID3v2ExtraMetaGEOB));
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if (!geob_data) {
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av_log(s, AV_LOG_ERROR, "Failed to alloc %zu bytes\n", sizeof(ID3v2ExtraMetaGEOB));
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return;
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}
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new_extra = av_mallocz(sizeof(ID3v2ExtraMeta));
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if (!new_extra) {
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av_log(s, AV_LOG_ERROR, "Failed to alloc %zu bytes\n", sizeof(ID3v2ExtraMeta));
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goto fail;
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}
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/* read encoding type byte */
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encoding = avio_r8(pb);
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taglen--;
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/* read MIME type (always ISO-8859) */
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if (decode_str(s, pb, ID3v2_ENCODING_ISO8859, &geob_data->mime_type, &taglen) < 0
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|| taglen <= 0)
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goto fail;
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/* read file name */
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if (decode_str(s, pb, encoding, &geob_data->file_name, &taglen) < 0
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|| taglen <= 0)
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goto fail;
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/* read content description */
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if (decode_str(s, pb, encoding, &geob_data->description, &taglen) < 0
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|| taglen < 0)
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goto fail;
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if (taglen) {
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/* save encapsulated binary data */
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geob_data->data = av_malloc(taglen);
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if (!geob_data->data) {
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av_log(s, AV_LOG_ERROR, "Failed to alloc %d bytes\n", taglen);
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goto fail;
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}
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if ((len = avio_read(pb, geob_data->data, taglen)) < taglen)
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av_log(s, AV_LOG_WARNING, "Error reading GEOB frame, data truncated.\n");
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geob_data->datasize = len;
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} else {
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geob_data->data = NULL;
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geob_data->datasize = 0;
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}
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/* add data to the list */
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new_extra->tag = "GEOB";
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new_extra->data = geob_data;
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new_extra->next = *extra_meta;
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*extra_meta = new_extra;
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return;
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fail:
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av_log(s, AV_LOG_ERROR, "Error reading frame %s, skipped\n", tag);
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free_geobtag(geob_data);
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av_free(new_extra);
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return;
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}
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static int is_number(const char *str)
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{
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while (*str >= '0' && *str <= '9') str++;
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return !*str;
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}
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static AVDictionaryEntry* get_date_tag(AVDictionary *m, const char *tag)
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{
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AVDictionaryEntry *t;
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if ((t = av_dict_get(m, tag, NULL, AV_DICT_MATCH_CASE)) &&
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strlen(t->value) == 4 && is_number(t->value))
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return t;
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return NULL;
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}
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|
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static void merge_date(AVDictionary **m)
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{
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AVDictionaryEntry *t;
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char date[17] = {0}; // YYYY-MM-DD hh:mm
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|
|
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if (!(t = get_date_tag(*m, "TYER")) &&
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!(t = get_date_tag(*m, "TYE")))
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return;
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av_strlcpy(date, t->value, 5);
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av_dict_set(m, "TYER", NULL, 0);
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av_dict_set(m, "TYE", NULL, 0);
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|
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if (!(t = get_date_tag(*m, "TDAT")) &&
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!(t = get_date_tag(*m, "TDA")))
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goto finish;
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snprintf(date + 4, sizeof(date) - 4, "-%.2s-%.2s", t->value + 2, t->value);
|
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av_dict_set(m, "TDAT", NULL, 0);
|
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av_dict_set(m, "TDA", NULL, 0);
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|
|
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if (!(t = get_date_tag(*m, "TIME")) &&
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!(t = get_date_tag(*m, "TIM")))
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goto finish;
|
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snprintf(date + 10, sizeof(date) - 10, " %.2s:%.2s", t->value, t->value + 2);
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av_dict_set(m, "TIME", NULL, 0);
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av_dict_set(m, "TIM", NULL, 0);
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|
|
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finish:
|
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if (date[0])
|
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av_dict_set(m, "date", date, 0);
|
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}
|
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|
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static void free_apic(void *obj)
|
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{
|
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ID3v2ExtraMetaAPIC *apic = obj;
|
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av_freep(&apic->data);
|
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av_freep(&apic->description);
|
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av_freep(&apic);
|
|
}
|
|
|
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static void read_apic(AVFormatContext *s, AVIOContext *pb, int taglen, char *tag, ID3v2ExtraMeta **extra_meta)
|
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{
|
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int enc, pic_type;
|
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char mimetype[64];
|
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const CodecMime *mime = ff_id3v2_mime_tags;
|
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enum AVCodecID id = AV_CODEC_ID_NONE;
|
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ID3v2ExtraMetaAPIC *apic = NULL;
|
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ID3v2ExtraMeta *new_extra = NULL;
|
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int64_t end = avio_tell(pb) + taglen;
|
|
|
|
if (taglen <= 4)
|
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goto fail;
|
|
|
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new_extra = av_mallocz(sizeof(*new_extra));
|
|
apic = av_mallocz(sizeof(*apic));
|
|
if (!new_extra || !apic)
|
|
goto fail;
|
|
|
|
enc = avio_r8(pb);
|
|
taglen--;
|
|
|
|
/* mimetype */
|
|
taglen -= avio_get_str(pb, taglen, mimetype, sizeof(mimetype));
|
|
while (mime->id != AV_CODEC_ID_NONE) {
|
|
if (!av_strncasecmp(mime->str, mimetype, sizeof(mimetype))) {
|
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id = mime->id;
|
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break;
|
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}
|
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mime++;
|
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}
|
|
if (id == AV_CODEC_ID_NONE) {
|
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av_log(s, AV_LOG_WARNING, "Unknown attached picture mimetype: %s, skipping.\n", mimetype);
|
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goto fail;
|
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}
|
|
apic->id = id;
|
|
|
|
/* picture type */
|
|
pic_type = avio_r8(pb);
|
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taglen--;
|
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if (pic_type < 0 || pic_type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types)) {
|
|
av_log(s, AV_LOG_WARNING, "Unknown attached picture type %d.\n", pic_type);
|
|
pic_type = 0;
|
|
}
|
|
apic->type = ff_id3v2_picture_types[pic_type];
|
|
|
|
/* description and picture data */
|
|
if (decode_str(s, pb, enc, &apic->description, &taglen) < 0) {
|
|
av_log(s, AV_LOG_ERROR, "Error decoding attached picture description.\n");
|
|
goto fail;
|
|
}
|
|
|
|
apic->len = taglen;
|
|
apic->data = av_malloc(taglen);
|
|
if (!apic->data || avio_read(pb, apic->data, taglen) != taglen)
|
|
goto fail;
|
|
|
|
new_extra->tag = "APIC";
|
|
new_extra->data = apic;
|
|
new_extra->next = *extra_meta;
|
|
*extra_meta = new_extra;
|
|
|
|
return;
|
|
|
|
fail:
|
|
if (apic)
|
|
free_apic(apic);
|
|
av_freep(&new_extra);
|
|
avio_seek(pb, end, SEEK_SET);
|
|
}
|
|
|
|
typedef struct ID3v2EMFunc {
|
|
const char *tag3;
|
|
const char *tag4;
|
|
void (*read)(AVFormatContext*, AVIOContext*, int, char*, ID3v2ExtraMeta **);
|
|
void (*free)(void *obj);
|
|
} ID3v2EMFunc;
|
|
|
|
static const ID3v2EMFunc id3v2_extra_meta_funcs[] = {
|
|
{ "GEO", "GEOB", read_geobtag, free_geobtag },
|
|
{ "PIC", "APIC", read_apic, free_apic },
|
|
{ NULL }
|
|
};
|
|
|
|
/**
|
|
* Get the corresponding ID3v2EMFunc struct for a tag.
|
|
* @param isv34 Determines if v2.2 or v2.3/4 strings are used
|
|
* @return A pointer to the ID3v2EMFunc struct if found, NULL otherwise.
|
|
*/
|
|
static const ID3v2EMFunc *get_extra_meta_func(const char *tag, int isv34)
|
|
{
|
|
int i = 0;
|
|
while (id3v2_extra_meta_funcs[i].tag3) {
|
|
if (!memcmp(tag,
|
|
(isv34 ? id3v2_extra_meta_funcs[i].tag4 :
|
|
id3v2_extra_meta_funcs[i].tag3),
|
|
(isv34 ? 4 : 3)))
|
|
return &id3v2_extra_meta_funcs[i];
|
|
i++;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static void ff_id3v2_parse(AVFormatContext *s, int len, uint8_t version, uint8_t flags, ID3v2ExtraMeta **extra_meta)
|
|
{
|
|
int isv34, tlen, unsync;
|
|
char tag[5];
|
|
int64_t next, end = avio_tell(s->pb) + len;
|
|
int taghdrlen;
|
|
const char *reason = NULL;
|
|
AVIOContext pb;
|
|
AVIOContext *pbx;
|
|
unsigned char *buffer = NULL;
|
|
int buffer_size = 0;
|
|
const ID3v2EMFunc *extra_func;
|
|
|
|
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 */
|
|
int extlen = get_size(s->pb, 4);
|
|
if (version == 4)
|
|
extlen -= 4; // in v2.4 the length includes the length field we just read
|
|
|
|
if (extlen < 0) {
|
|
reason = "invalid extended header length";
|
|
goto error;
|
|
}
|
|
avio_skip(s->pb, extlen);
|
|
}
|
|
|
|
while (len >= taghdrlen) {
|
|
unsigned int tflags = 0;
|
|
int tunsync = 0;
|
|
|
|
if (isv34) {
|
|
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 {
|
|
avio_read(s->pb, tag, 3);
|
|
tag[3] = 0;
|
|
tlen = avio_rb24(s->pb);
|
|
}
|
|
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;
|
|
|
|
if (!tlen) {
|
|
if (tag[0])
|
|
av_log(s, AV_LOG_DEBUG, "Invalid empty frame %s, skipping.\n", tag);
|
|
continue;
|
|
}
|
|
|
|
if (tflags & ID3v2_FLAG_DATALEN) {
|
|
avio_rb32(s->pb);
|
|
tlen -= 4;
|
|
}
|
|
|
|
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);
|
|
/* check for text tag or supported special meta tag */
|
|
} else if (tag[0] == 'T' || (extra_meta && (extra_func = get_extra_meta_func(tag, isv34)))) {
|
|
if (unsync || tunsync) {
|
|
int64_t end = avio_tell(s->pb) + tlen;
|
|
uint8_t *b;
|
|
av_fast_malloc(&buffer, &buffer_size, tlen);
|
|
if (!buffer) {
|
|
av_log(s, AV_LOG_ERROR, "Failed to alloc %d bytes\n", tlen);
|
|
goto seek;
|
|
}
|
|
b = buffer;
|
|
while (avio_tell(s->pb) < end) {
|
|
*b++ = avio_r8(s->pb);
|
|
if (*(b - 1) == 0xff && avio_tell(s->pb) < end - 1) {
|
|
uint8_t val = avio_r8(s->pb);
|
|
*b++ = val ? val : avio_r8(s->pb);
|
|
}
|
|
}
|
|
ffio_init_context(&pb, buffer, b - buffer, 0, NULL, NULL, NULL, NULL);
|
|
tlen = b - buffer;
|
|
pbx = &pb; // read from sync buffer
|
|
} else {
|
|
pbx = s->pb; // read straight from input
|
|
}
|
|
if (tag[0] == 'T')
|
|
/* parse text tag */
|
|
read_ttag(s, pbx, tlen, tag);
|
|
else
|
|
/* parse special meta tag */
|
|
extra_func->read(s, pbx, tlen, tag, extra_meta);
|
|
}
|
|
else if (!tag[0]) {
|
|
if (tag[1])
|
|
av_log(s, AV_LOG_WARNING, "invalid frame id, assuming padding");
|
|
avio_skip(s->pb, tlen);
|
|
break;
|
|
}
|
|
/* Skip to end of tag */
|
|
seek:
|
|
avio_seek(s->pb, next, SEEK_SET);
|
|
}
|
|
|
|
if (version == 4 && flags & 0x10) /* Footer preset, always 10 bytes, skip over it */
|
|
end += 10;
|
|
|
|
error:
|
|
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, ID3v2ExtraMeta **extra_meta)
|
|
{
|
|
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], extra_meta);
|
|
} 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, id3v2_2_metadata_conv);
|
|
ff_metadata_conv(&s->metadata, NULL, ff_id3v2_4_metadata_conv);
|
|
merge_date(&s->metadata);
|
|
}
|
|
|
|
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
|
|
{
|
|
ID3v2ExtraMeta *current = *extra_meta, *next;
|
|
const ID3v2EMFunc *extra_func;
|
|
|
|
while (current) {
|
|
if ((extra_func = get_extra_meta_func(current->tag, 1)))
|
|
extra_func->free(current->data);
|
|
next = current->next;
|
|
av_freep(¤t);
|
|
current = next;
|
|
}
|
|
}
|
|
|
|
int ff_id3v2_parse_apic(AVFormatContext *s, ID3v2ExtraMeta **extra_meta)
|
|
{
|
|
ID3v2ExtraMeta *cur;
|
|
|
|
for (cur = *extra_meta; cur; cur = cur->next) {
|
|
ID3v2ExtraMetaAPIC *apic;
|
|
AVStream *st;
|
|
|
|
if (strcmp(cur->tag, "APIC"))
|
|
continue;
|
|
apic = cur->data;
|
|
|
|
if (!(st = avformat_new_stream(s, NULL)))
|
|
return AVERROR(ENOMEM);
|
|
|
|
st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
|
|
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
|
|
st->codec->codec_id = apic->id;
|
|
av_dict_set(&st->metadata, "title", apic->description, 0);
|
|
av_dict_set(&st->metadata, "comment", apic->type, 0);
|
|
|
|
av_init_packet(&st->attached_pic);
|
|
st->attached_pic.data = apic->data;
|
|
st->attached_pic.size = apic->len;
|
|
st->attached_pic.destruct = av_destruct_packet;
|
|
st->attached_pic.stream_index = st->index;
|
|
st->attached_pic.flags |= AV_PKT_FLAG_KEY;
|
|
|
|
apic->data = NULL;
|
|
apic->len = 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|