| /* |
| * Copyright (c) 2003 Fabrice Bellard |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg 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, |
| * 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 |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /** |
| * @file |
| * ID3v2 header parser |
| * |
| * Specifications available at: |
| * http://id3.org/Developer_Information |
| */ |
| |
| #include "config.h" |
| |
| #if CONFIG_ZLIB |
| #include <zlib.h> |
| #endif |
| |
| #include "libavutil/avstring.h" |
| #include "libavutil/bprint.h" |
| #include "libavutil/dict.h" |
| #include "libavutil/intreadwrite.h" |
| #include "libavcodec/png.h" |
| #include "avio_internal.h" |
| #include "internal.h" |
| #include "id3v1.h" |
| #include "id3v2.h" |
| |
| 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" }, |
| { "USLT", "lyrics" }, |
| { 0 } |
| }; |
| |
| const AVMetadataConv ff_id3v2_4_metadata_conv[] = { |
| { "TCMP", "compilation" }, |
| { "TDRC", "date" }, |
| { "TDRL", "date" }, |
| { "TDEN", "creation_time" }, |
| { "TSOA", "album-sort" }, |
| { "TSOP", "artist-sort" }, |
| { "TSOT", "title-sort" }, |
| { 0 } |
| }; |
| |
| static const AVMetadataConv id3v2_2_metadata_conv[] = { |
| { "TAL", "album" }, |
| { "TCO", "genre" }, |
| { "TCP", "compilation" }, |
| { "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 }, |
| }; |
| |
| const char * const ff_id3v2_picture_types[21] = { |
| "Other", |
| "32x32 pixels 'file icon'", |
| "Other file icon", |
| "Cover (front)", |
| "Cover (back)", |
| "Leaflet page", |
| "Media (e.g. label side of CD)", |
| "Lead artist/lead performer/soloist", |
| "Artist/performer", |
| "Conductor", |
| "Band/Orchestra", |
| "Composer", |
| "Lyricist/text writer", |
| "Recording Location", |
| "During recording", |
| "During performance", |
| "Movie/video screen capture", |
| "A bright coloured fish", |
| "Illustration", |
| "Band/artist logotype", |
| "Publisher/Studio logotype", |
| }; |
| |
| const CodecMime ff_id3v2_mime_tags[] = { |
| { "image/gif", AV_CODEC_ID_GIF }, |
| { "image/jpeg", AV_CODEC_ID_MJPEG }, |
| { "image/jpg", AV_CODEC_ID_MJPEG }, |
| { "image/png", AV_CODEC_ID_PNG }, |
| { "image/tiff", AV_CODEC_ID_TIFF }, |
| { "image/bmp", AV_CODEC_ID_BMP }, |
| { "JPG", AV_CODEC_ID_MJPEG }, /* ID3v2.2 */ |
| { "PNG", AV_CODEC_ID_PNG }, /* ID3v2.2 */ |
| { "", AV_CODEC_ID_NONE }, |
| }; |
| |
| int ff_id3v2_match(const uint8_t *buf, const char *magic) |
| { |
| 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; |
| if (buf[5] & 0x10) |
| len += ID3v2_HEADER_SIZE; |
| return len; |
| } |
| |
| static unsigned int get_size(AVIOContext *s, int len) |
| { |
| int v = 0; |
| while (len--) |
| v = (v << 7) + (avio_r8(s) & 0x7F); |
| return v; |
| } |
| |
| static unsigned int size_to_syncsafe(unsigned int size) |
| { |
| return (((size) & (0x7f << 0)) >> 0) + |
| (((size) & (0x7f << 8)) >> 1) + |
| (((size) & (0x7f << 16)) >> 2) + |
| (((size) & (0x7f << 24)) >> 3); |
| } |
| |
| /* No real verification, only check that the tag consists of |
| * a combination of capital alpha-numerical characters */ |
| static int is_tag(const char *buf, unsigned int len) |
| { |
| if (!len) |
| return 0; |
| |
| while (len--) |
| if ((buf[len] < 'A' || |
| buf[len] > 'Z') && |
| (buf[len] < '0' || |
| buf[len] > '9')) |
| return 0; |
| |
| return 1; |
| } |
| |
| /** |
| * Return 1 if the tag of length len at the given offset is valid, 0 if not, -1 on error |
| */ |
| static int check_tag(AVIOContext *s, int offset, unsigned int len) |
| { |
| char tag[4]; |
| |
| if (len > 4 || |
| avio_seek(s, offset, SEEK_SET) < 0 || |
| avio_read(s, tag, len) < (int)len) |
| return -1; |
| else if (!AV_RB32(tag) || is_tag(tag, len)) |
| return 1; |
| |
| return 0; |
| } |
| |
| /** |
| * Free GEOB type extra metadata. |
| */ |
| static void free_geobtag(void *obj) |
| { |
| ID3v2ExtraMetaGEOB *geob = obj; |
| av_freep(&geob->mime_type); |
| av_freep(&geob->file_name); |
| av_freep(&geob->description); |
| av_freep(&geob->data); |
| } |
| |
| /** |
| * Decode characters to UTF-8 according to encoding type. The decoded buffer is |
| * always null terminated. Stop reading when either *maxread bytes are read from |
| * pb or U+0000 character is found. |
| * |
| * @param dst Pointer where the address of the buffer with the decoded bytes is |
| * stored. Buffer must be freed by caller. |
| * @param maxread Pointer to maximum number of characters to read from the |
| * AVIOContext. After execution the value is decremented by the number of bytes |
| * actually read. |
| * @returns 0 if no error occurred, dst is uninitialized on error |
| */ |
| static int decode_str(AVFormatContext *s, AVIOContext *pb, int encoding, |
| uint8_t **dst, int *maxread) |
| { |
| int ret; |
| uint8_t tmp; |
| uint32_t ch = 1; |
| int left = *maxread; |
| unsigned int (*get)(AVIOContext*) = avio_rb16; |
| AVIOContext *dynbuf; |
| |
| if ((ret = avio_open_dyn_buf(&dynbuf)) < 0) { |
| av_log(s, AV_LOG_ERROR, "Error opening memory stream\n"); |
| return ret; |
| } |
| |
| switch (encoding) { |
| case ID3v2_ENCODING_ISO8859: |
| while (left && ch) { |
| ch = avio_r8(pb); |
| PUT_UTF8(ch, tmp, avio_w8(dynbuf, tmp);) |
| left--; |
| } |
| break; |
| |
| case ID3v2_ENCODING_UTF16BOM: |
| if ((left -= 2) < 0) { |
| av_log(s, AV_LOG_ERROR, "Cannot read BOM value, input too short\n"); |
| ffio_free_dyn_buf(&dynbuf); |
| *dst = NULL; |
| return AVERROR_INVALIDDATA; |
| } |
| switch (avio_rb16(pb)) { |
| case 0xfffe: |
| get = avio_rl16; |
| case 0xfeff: |
| break; |
| default: |
| av_log(s, AV_LOG_ERROR, "Incorrect BOM value\n"); |
| ffio_free_dyn_buf(&dynbuf); |
| *dst = NULL; |
| *maxread = left; |
| return AVERROR_INVALIDDATA; |
| } |
| // fall-through |
| |
| case ID3v2_ENCODING_UTF16BE: |
| while ((left > 1) && ch) { |
| GET_UTF16(ch, ((left -= 2) >= 0 ? get(pb) : 0), break;) |
| PUT_UTF8(ch, tmp, avio_w8(dynbuf, tmp);) |
| } |
| if (left < 0) |
| left += 2; /* did not read last char from pb */ |
| break; |
| |
| case ID3v2_ENCODING_UTF8: |
| while (left && ch) { |
| ch = avio_r8(pb); |
| avio_w8(dynbuf, ch); |
| left--; |
| } |
| break; |
| default: |
| av_log(s, AV_LOG_WARNING, "Unknown encoding\n"); |
| } |
| |
| if (ch) |
| avio_w8(dynbuf, 0); |
| |
| avio_close_dyn_buf(dynbuf, dst); |
| *maxread = left; |
| |
| return 0; |
| } |
| |
| /** |
| * Parse a text tag. |
| */ |
| static void read_ttag(AVFormatContext *s, AVIOContext *pb, int taglen, |
| AVDictionary **metadata, const char *key) |
| { |
| uint8_t *dst; |
| int encoding, dict_flags = AV_DICT_DONT_OVERWRITE | AV_DICT_DONT_STRDUP_VAL; |
| unsigned genre; |
| |
| if (taglen < 1) |
| return; |
| |
| encoding = avio_r8(pb); |
| taglen--; /* account for encoding type byte */ |
| |
| if (decode_str(s, pb, encoding, &dst, &taglen) < 0) { |
| av_log(s, AV_LOG_ERROR, "Error reading frame %s, skipped\n", key); |
| return; |
| } |
| |
| if (!(strcmp(key, "TCON") && strcmp(key, "TCO")) && |
| (sscanf(dst, "(%d)", &genre) == 1 || sscanf(dst, "%d", &genre) == 1) && |
| genre <= ID3v1_GENRE_MAX) { |
| av_freep(&dst); |
| dst = av_strdup(ff_id3v1_genre_str[genre]); |
| } else if (!(strcmp(key, "TXXX") && strcmp(key, "TXX"))) { |
| /* dst now contains the key, need to get value */ |
| key = dst; |
| if (decode_str(s, pb, encoding, &dst, &taglen) < 0) { |
| av_log(s, AV_LOG_ERROR, "Error reading frame %s, skipped\n", key); |
| av_freep(&key); |
| return; |
| } |
| dict_flags |= AV_DICT_DONT_STRDUP_KEY; |
| } else if (!*dst) |
| av_freep(&dst); |
| |
| if (dst) |
| av_dict_set(metadata, key, dst, dict_flags); |
| } |
| |
| static void read_uslt(AVFormatContext *s, AVIOContext *pb, int taglen, |
| AVDictionary **metadata) |
| { |
| uint8_t lang[4]; |
| uint8_t *descriptor = NULL; // 'Content descriptor' |
| uint8_t *text; |
| char *key; |
| int encoding; |
| int ok = 0; |
| |
| if (taglen < 1) |
| goto error; |
| |
| encoding = avio_r8(pb); |
| taglen--; |
| |
| if (avio_read(pb, lang, 3) < 3) |
| goto error; |
| lang[3] = '\0'; |
| taglen -= 3; |
| |
| if (decode_str(s, pb, encoding, &descriptor, &taglen) < 0) |
| goto error; |
| |
| if (decode_str(s, pb, encoding, &text, &taglen) < 0) |
| goto error; |
| |
| // FFmpeg does not support hierarchical metadata, so concatenate the keys. |
| key = av_asprintf("lyrics-%s%s%s", descriptor[0] ? (char *)descriptor : "", |
| descriptor[0] ? "-" : "", |
| lang); |
| if (!key) { |
| av_free(text); |
| goto error; |
| } |
| |
| av_dict_set(metadata, key, text, |
| AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL); |
| |
| ok = 1; |
| error: |
| if (!ok) |
| av_log(s, AV_LOG_ERROR, "Error reading lyrics, skipped\n"); |
| av_free(descriptor); |
| } |
| |
| /** |
| * Parse a comment tag. |
| */ |
| static void read_comment(AVFormatContext *s, AVIOContext *pb, int taglen, |
| AVDictionary **metadata) |
| { |
| const char *key = "comment"; |
| uint8_t *dst; |
| int encoding, dict_flags = AV_DICT_DONT_OVERWRITE | AV_DICT_DONT_STRDUP_VAL; |
| av_unused int language; |
| |
| if (taglen < 4) |
| return; |
| |
| encoding = avio_r8(pb); |
| language = avio_rl24(pb); |
| taglen -= 4; |
| |
| if (decode_str(s, pb, encoding, &dst, &taglen) < 0) { |
| av_log(s, AV_LOG_ERROR, "Error reading comment frame, skipped\n"); |
| return; |
| } |
| |
| if (dst && !*dst) |
| av_freep(&dst); |
| |
| if (dst) { |
| key = (const char *) dst; |
| dict_flags |= AV_DICT_DONT_STRDUP_KEY; |
| } |
| |
| if (decode_str(s, pb, encoding, &dst, &taglen) < 0) { |
| av_log(s, AV_LOG_ERROR, "Error reading comment frame, skipped\n"); |
| if (dict_flags & AV_DICT_DONT_STRDUP_KEY) |
| av_freep((void*)&key); |
| return; |
| } |
| |
| if (dst) |
| av_dict_set(metadata, key, (const char *) dst, dict_flags); |
| } |
| |
| /** |
| * Parse GEOB tag into a ID3v2ExtraMetaGEOB struct. |
| */ |
| static void read_geobtag(AVFormatContext *s, AVIOContext *pb, int taglen, |
| const char *tag, ID3v2ExtraMeta **extra_meta, |
| int isv34) |
| { |
| ID3v2ExtraMetaGEOB *geob_data = NULL; |
| ID3v2ExtraMeta *new_extra = NULL; |
| char encoding; |
| unsigned int len; |
| |
| if (taglen < 1) |
| return; |
| |
| new_extra = av_mallocz(sizeof(ID3v2ExtraMeta)); |
| if (!new_extra) { |
| av_log(s, AV_LOG_ERROR, "Failed to alloc %"SIZE_SPECIFIER" bytes\n", |
| sizeof(ID3v2ExtraMeta)); |
| return; |
| } |
| |
| geob_data = &new_extra->data.geob; |
| |
| /* read encoding type byte */ |
| encoding = avio_r8(pb); |
| taglen--; |
| |
| /* read MIME type (always ISO-8859) */ |
| if (decode_str(s, pb, ID3v2_ENCODING_ISO8859, &geob_data->mime_type, |
| &taglen) < 0 || |
| taglen <= 0) |
| goto fail; |
| |
| /* read file name */ |
| if (decode_str(s, pb, encoding, &geob_data->file_name, &taglen) < 0 || |
| taglen <= 0) |
| goto fail; |
| |
| /* read content description */ |
| if (decode_str(s, pb, encoding, &geob_data->description, &taglen) < 0 || |
| taglen < 0) |
| goto fail; |
| |
| if (taglen) { |
| /* save encapsulated binary data */ |
| geob_data->data = av_malloc(taglen); |
| if (!geob_data->data) { |
| av_log(s, AV_LOG_ERROR, "Failed to alloc %d bytes\n", taglen); |
| goto fail; |
| } |
| if ((len = avio_read(pb, geob_data->data, taglen)) < taglen) |
| av_log(s, AV_LOG_WARNING, |
| "Error reading GEOB frame, data truncated.\n"); |
| geob_data->datasize = len; |
| } else { |
| geob_data->data = NULL; |
| geob_data->datasize = 0; |
| } |
| |
| /* add data to the list */ |
| new_extra->tag = "GEOB"; |
| new_extra->next = *extra_meta; |
| *extra_meta = new_extra; |
| |
| return; |
| |
| fail: |
| av_log(s, AV_LOG_ERROR, "Error reading frame %s, skipped\n", tag); |
| free_geobtag(geob_data); |
| av_free(new_extra); |
| return; |
| } |
| |
| static int is_number(const char *str) |
| { |
| while (*str >= '0' && *str <= '9') |
| str++; |
| return !*str; |
| } |
| |
| static AVDictionaryEntry *get_date_tag(AVDictionary *m, const char *tag) |
| { |
| AVDictionaryEntry *t; |
| if ((t = av_dict_get(m, tag, NULL, AV_DICT_MATCH_CASE)) && |
| strlen(t->value) == 4 && is_number(t->value)) |
| return t; |
| return NULL; |
| } |
| |
| static void merge_date(AVDictionary **m) |
| { |
| AVDictionaryEntry *t; |
| char date[17] = { 0 }; // YYYY-MM-DD hh:mm |
| |
| if (!(t = get_date_tag(*m, "TYER")) && |
| !(t = get_date_tag(*m, "TYE"))) |
| return; |
| av_strlcpy(date, t->value, 5); |
| av_dict_set(m, "TYER", NULL, 0); |
| av_dict_set(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_dict_set(m, "TDAT", NULL, 0); |
| av_dict_set(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_dict_set(m, "TIME", NULL, 0); |
| av_dict_set(m, "TIM", NULL, 0); |
| |
| finish: |
| if (date[0]) |
| av_dict_set(m, "date", date, 0); |
| } |
| |
| static void free_apic(void *obj) |
| { |
| ID3v2ExtraMetaAPIC *apic = obj; |
| av_buffer_unref(&apic->buf); |
| av_freep(&apic->description); |
| } |
| |
| static void rstrip_spaces(char *buf) |
| { |
| size_t len = strlen(buf); |
| while (len > 0 && buf[len - 1] == ' ') |
| buf[--len] = 0; |
| } |
| |
| static void read_apic(AVFormatContext *s, AVIOContext *pb, int taglen, |
| const char *tag, ID3v2ExtraMeta **extra_meta, |
| int isv34) |
| { |
| int enc, pic_type; |
| char mimetype[64] = {0}; |
| const CodecMime *mime = ff_id3v2_mime_tags; |
| enum AVCodecID id = AV_CODEC_ID_NONE; |
| ID3v2ExtraMetaAPIC *apic = NULL; |
| ID3v2ExtraMeta *new_extra = NULL; |
| int64_t end = avio_tell(pb) + taglen; |
| |
| if (taglen <= 4 || (!isv34 && taglen <= 6)) |
| goto fail; |
| |
| new_extra = av_mallocz(sizeof(*new_extra)); |
| if (!new_extra) |
| goto fail; |
| |
| apic = &new_extra->data.apic; |
| |
| enc = avio_r8(pb); |
| taglen--; |
| |
| /* mimetype */ |
| if (isv34) { |
| taglen -= avio_get_str(pb, taglen, mimetype, sizeof(mimetype)); |
| } else { |
| if (avio_read(pb, mimetype, 3) < 0) |
| goto fail; |
| |
| mimetype[3] = 0; |
| taglen -= 3; |
| } |
| |
| while (mime->id != AV_CODEC_ID_NONE) { |
| if (!av_strncasecmp(mime->str, mimetype, sizeof(mimetype))) { |
| id = mime->id; |
| break; |
| } |
| mime++; |
| } |
| if (id == AV_CODEC_ID_NONE) { |
| av_log(s, AV_LOG_WARNING, |
| "Unknown attached picture mimetype: %s, skipping.\n", mimetype); |
| goto fail; |
| } |
| apic->id = id; |
| |
| /* picture type */ |
| pic_type = avio_r8(pb); |
| taglen--; |
| 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->buf = av_buffer_alloc(taglen + AV_INPUT_BUFFER_PADDING_SIZE); |
| if (!apic->buf || !taglen || avio_read(pb, apic->buf->data, taglen) != taglen) |
| goto fail; |
| memset(apic->buf->data + taglen, 0, AV_INPUT_BUFFER_PADDING_SIZE); |
| |
| new_extra->tag = "APIC"; |
| new_extra->next = *extra_meta; |
| *extra_meta = new_extra; |
| |
| // The description must be unique, and some ID3v2 tag writers add spaces |
| // to write several APIC entries with the same description. |
| rstrip_spaces(apic->description); |
| |
| return; |
| |
| fail: |
| if (apic) |
| free_apic(apic); |
| av_freep(&new_extra); |
| avio_seek(pb, end, SEEK_SET); |
| } |
| |
| static void free_chapter(void *obj) |
| { |
| ID3v2ExtraMetaCHAP *chap = obj; |
| av_freep(&chap->element_id); |
| av_dict_free(&chap->meta); |
| } |
| |
| static void read_chapter(AVFormatContext *s, AVIOContext *pb, int len, const char *ttag, ID3v2ExtraMeta **extra_meta, int isv34) |
| { |
| int taglen; |
| char tag[5]; |
| ID3v2ExtraMeta *new_extra = NULL; |
| ID3v2ExtraMetaCHAP *chap = NULL; |
| |
| new_extra = av_mallocz(sizeof(*new_extra)); |
| if (!new_extra) |
| return; |
| |
| chap = &new_extra->data.chap; |
| |
| if (decode_str(s, pb, 0, &chap->element_id, &len) < 0) |
| goto fail; |
| |
| if (len < 16) |
| goto fail; |
| |
| chap->start = avio_rb32(pb); |
| chap->end = avio_rb32(pb); |
| avio_skip(pb, 8); |
| |
| len -= 16; |
| while (len > 10) { |
| if (avio_read(pb, tag, 4) < 4) |
| goto fail; |
| tag[4] = 0; |
| taglen = avio_rb32(pb); |
| avio_skip(pb, 2); |
| len -= 10; |
| if (taglen < 0 || taglen > len) |
| goto fail; |
| if (tag[0] == 'T') |
| read_ttag(s, pb, taglen, &chap->meta, tag); |
| else |
| avio_skip(pb, taglen); |
| len -= taglen; |
| } |
| |
| ff_metadata_conv(&chap->meta, NULL, ff_id3v2_34_metadata_conv); |
| ff_metadata_conv(&chap->meta, NULL, ff_id3v2_4_metadata_conv); |
| |
| new_extra->tag = "CHAP"; |
| new_extra->next = *extra_meta; |
| *extra_meta = new_extra; |
| |
| return; |
| |
| fail: |
| free_chapter(chap); |
| av_freep(&new_extra); |
| } |
| |
| static void free_priv(void *obj) |
| { |
| ID3v2ExtraMetaPRIV *priv = obj; |
| av_freep(&priv->owner); |
| av_freep(&priv->data); |
| } |
| |
| static void read_priv(AVFormatContext *s, AVIOContext *pb, int taglen, |
| const char *tag, ID3v2ExtraMeta **extra_meta, int isv34) |
| { |
| ID3v2ExtraMeta *meta; |
| ID3v2ExtraMetaPRIV *priv; |
| |
| meta = av_mallocz(sizeof(*meta)); |
| if (!meta) |
| return; |
| |
| priv = &meta->data.priv; |
| |
| if (decode_str(s, pb, ID3v2_ENCODING_ISO8859, &priv->owner, &taglen) < 0) |
| goto fail; |
| |
| priv->data = av_malloc(taglen); |
| if (!priv->data) |
| goto fail; |
| |
| priv->datasize = taglen; |
| |
| if (avio_read(pb, priv->data, priv->datasize) != priv->datasize) |
| goto fail; |
| |
| meta->tag = "PRIV"; |
| meta->next = *extra_meta; |
| *extra_meta = meta; |
| |
| return; |
| |
| fail: |
| free_priv(priv); |
| av_freep(&meta); |
| } |
| |
| typedef struct ID3v2EMFunc { |
| const char *tag3; |
| const char *tag4; |
| void (*read)(AVFormatContext *s, AVIOContext *pb, int taglen, |
| const char *tag, ID3v2ExtraMeta **extra_meta, |
| int isv34); |
| void (*free)(void *obj); |
| } ID3v2EMFunc; |
| |
| static const ID3v2EMFunc id3v2_extra_meta_funcs[] = { |
| { "GEO", "GEOB", read_geobtag, free_geobtag }, |
| { "PIC", "APIC", read_apic, free_apic }, |
| { "CHAP","CHAP", read_chapter, free_chapter }, |
| { "PRIV","PRIV", read_priv, free_priv }, |
| { 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 (tag && !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 id3v2_parse(AVIOContext *pb, AVDictionary **metadata, |
| AVFormatContext *s, int len, uint8_t version, |
| uint8_t flags, ID3v2ExtraMeta **extra_meta) |
| { |
| int isv34, unsync; |
| unsigned tlen; |
| char tag[5]; |
| int64_t next, end = avio_tell(pb) + len; |
| int taghdrlen; |
| const char *reason = NULL; |
| AVIOContext pb_local; |
| AVIOContext *pbx; |
| unsigned char *buffer = NULL; |
| int buffer_size = 0; |
| const ID3v2EMFunc *extra_func = NULL; |
| unsigned char *uncompressed_buffer = NULL; |
| av_unused int uncompressed_buffer_size = 0; |
| const char *comm_frame; |
| |
| av_log(s, AV_LOG_DEBUG, "id3v2 ver:%d flags:%02X len:%d\n", version, flags, len); |
| |
| switch (version) { |
| case 2: |
| if (flags & 0x40) { |
| reason = "compression"; |
| goto error; |
| } |
| isv34 = 0; |
| taghdrlen = 6; |
| comm_frame = "COM"; |
| break; |
| |
| case 3: |
| case 4: |
| isv34 = 1; |
| taghdrlen = 10; |
| comm_frame = "COMM"; |
| break; |
| |
| default: |
| reason = "version"; |
| goto error; |
| } |
| |
| unsync = flags & 0x80; |
| |
| if (isv34 && flags & 0x40) { /* Extended header present, just skip over it */ |
| int extlen = get_size(pb, 4); |
| if (version == 4) |
| /* In v2.4 the length includes the length field we just read. */ |
| extlen -= 4; |
| |
| if (extlen < 0) { |
| reason = "invalid extended header length"; |
| goto error; |
| } |
| avio_skip(pb, extlen); |
| len -= extlen + 4; |
| if (len < 0) { |
| reason = "extended header too long."; |
| goto error; |
| } |
| } |
| |
| while (len >= taghdrlen) { |
| unsigned int tflags = 0; |
| int tunsync = 0; |
| int tcomp = 0; |
| int tencr = 0; |
| unsigned long av_unused dlen; |
| |
| if (isv34) { |
| if (avio_read(pb, tag, 4) < 4) |
| break; |
| tag[4] = 0; |
| if (version == 3) { |
| tlen = avio_rb32(pb); |
| } else { |
| /* some encoders incorrectly uses v3 sizes instead of syncsafe ones |
| * so check the next tag to see which one to use */ |
| tlen = avio_rb32(pb); |
| if (tlen > 0x7f) { |
| if (tlen < len) { |
| int64_t cur = avio_tell(pb); |
| |
| if (ffio_ensure_seekback(pb, 2 /* tflags */ + tlen + 4 /* next tag */)) |
| break; |
| |
| if (check_tag(pb, cur + 2 + size_to_syncsafe(tlen), 4) == 1) |
| tlen = size_to_syncsafe(tlen); |
| else if (check_tag(pb, cur + 2 + tlen, 4) != 1) |
| break; |
| avio_seek(pb, cur, SEEK_SET); |
| } else |
| tlen = size_to_syncsafe(tlen); |
| } |
| } |
| tflags = avio_rb16(pb); |
| tunsync = tflags & ID3v2_FLAG_UNSYNCH; |
| } else { |
| if (avio_read(pb, tag, 3) < 3) |
| break; |
| tag[3] = 0; |
| tlen = avio_rb24(pb); |
| } |
| if (tlen > (1<<28)) |
| break; |
| len -= taghdrlen + tlen; |
| |
| if (len < 0) |
| break; |
| |
| next = avio_tell(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) { |
| if (tlen < 4) |
| break; |
| dlen = avio_rb32(pb); |
| tlen -= 4; |
| } else |
| dlen = tlen; |
| |
| tcomp = tflags & ID3v2_FLAG_COMPRESSION; |
| tencr = tflags & ID3v2_FLAG_ENCRYPTION; |
| |
| /* skip encrypted tags and, if no zlib, compressed tags */ |
| if (tencr || (!CONFIG_ZLIB && tcomp)) { |
| const char *type; |
| if (!tcomp) |
| type = "encrypted"; |
| else if (!tencr) |
| type = "compressed"; |
| else |
| type = "encrypted and compressed"; |
| |
| av_log(s, AV_LOG_WARNING, "Skipping %s ID3v2 frame %s.\n", type, tag); |
| avio_skip(pb, tlen); |
| /* check for text tag or supported special meta tag */ |
| } else if (tag[0] == 'T' || |
| !memcmp(tag, "USLT", 4) || |
| !strcmp(tag, comm_frame) || |
| (extra_meta && |
| (extra_func = get_extra_meta_func(tag, isv34)))) { |
| pbx = pb; |
| |
| if (unsync || tunsync || tcomp) { |
| av_fast_malloc(&buffer, &buffer_size, tlen); |
| if (!buffer) { |
| av_log(s, AV_LOG_ERROR, "Failed to alloc %d bytes\n", tlen); |
| goto seek; |
| } |
| } |
| if (unsync || tunsync) { |
| uint8_t *b = buffer; |
| uint8_t *t = buffer; |
| uint8_t *end = t + tlen; |
| |
| if (avio_read(pb, buffer, tlen) != tlen) { |
| av_log(s, AV_LOG_ERROR, "Failed to read tag data\n"); |
| goto seek; |
| } |
| |
| while (t != end) { |
| *b++ = *t++; |
| if (t != end && t[-1] == 0xff && !t[0]) |
| t++; |
| } |
| |
| ffio_init_context(&pb_local, buffer, b - buffer, 0, NULL, NULL, NULL, |
| NULL); |
| tlen = b - buffer; |
| pbx = &pb_local; // read from sync buffer |
| } |
| |
| #if CONFIG_ZLIB |
| if (tcomp) { |
| int err; |
| |
| av_log(s, AV_LOG_DEBUG, "Compresssed frame %s tlen=%d dlen=%ld\n", tag, tlen, dlen); |
| |
| if (tlen <= 0) |
| goto seek; |
| |
| av_fast_malloc(&uncompressed_buffer, &uncompressed_buffer_size, dlen); |
| if (!uncompressed_buffer) { |
| av_log(s, AV_LOG_ERROR, "Failed to alloc %ld bytes\n", dlen); |
| goto seek; |
| } |
| |
| if (!(unsync || tunsync)) { |
| err = avio_read(pb, buffer, tlen); |
| if (err < 0) { |
| av_log(s, AV_LOG_ERROR, "Failed to read compressed tag\n"); |
| goto seek; |
| } |
| tlen = err; |
| } |
| |
| err = uncompress(uncompressed_buffer, &dlen, buffer, tlen); |
| if (err != Z_OK) { |
| av_log(s, AV_LOG_ERROR, "Failed to uncompress tag: %d\n", err); |
| goto seek; |
| } |
| ffio_init_context(&pb_local, uncompressed_buffer, dlen, 0, NULL, NULL, NULL, NULL); |
| tlen = dlen; |
| pbx = &pb_local; // read from sync buffer |
| } |
| #endif |
| if (tag[0] == 'T') |
| /* parse text tag */ |
| read_ttag(s, pbx, tlen, metadata, tag); |
| else if (!memcmp(tag, "USLT", 4)) |
| read_uslt(s, pbx, tlen, metadata); |
| else if (!strcmp(tag, comm_frame)) |
| read_comment(s, pbx, tlen, metadata); |
| else |
| /* parse special meta tag */ |
| extra_func->read(s, pbx, tlen, tag, extra_meta, isv34); |
| } else if (!tag[0]) { |
| if (tag[1]) |
| av_log(s, AV_LOG_WARNING, "invalid frame id, assuming padding\n"); |
| avio_skip(pb, tlen); |
| break; |
| } |
| /* Skip to end of tag */ |
| seek: |
| avio_seek(pb, next, SEEK_SET); |
| } |
| |
| /* Footer preset, always 10 bytes, skip over it */ |
| if (version == 4 && flags & 0x10) |
| end += 10; |
| |
| error: |
| if (reason) |
| av_log(s, AV_LOG_INFO, "ID3v2.%d tag skipped, cannot handle %s\n", |
| version, reason); |
| avio_seek(pb, end, SEEK_SET); |
| av_free(buffer); |
| av_free(uncompressed_buffer); |
| return; |
| } |
| |
| static void id3v2_read_internal(AVIOContext *pb, AVDictionary **metadata, |
| AVFormatContext *s, const char *magic, |
| ID3v2ExtraMeta **extra_meta, int64_t max_search_size) |
| { |
| int len, ret; |
| uint8_t buf[ID3v2_HEADER_SIZE]; |
| int found_header; |
| int64_t start, off; |
| |
| if (max_search_size && max_search_size < ID3v2_HEADER_SIZE) |
| return; |
| |
| start = avio_tell(pb); |
| do { |
| /* save the current offset in case there's nothing to read/skip */ |
| off = avio_tell(pb); |
| if (max_search_size && off - start >= max_search_size - ID3v2_HEADER_SIZE) { |
| avio_seek(pb, off, SEEK_SET); |
| break; |
| } |
| |
| ret = ffio_ensure_seekback(pb, ID3v2_HEADER_SIZE); |
| if (ret >= 0) |
| ret = avio_read(pb, buf, ID3v2_HEADER_SIZE); |
| if (ret != ID3v2_HEADER_SIZE) { |
| avio_seek(pb, off, SEEK_SET); |
| 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); |
| id3v2_parse(pb, metadata, s, len, buf[3], buf[5], extra_meta); |
| } else { |
| avio_seek(pb, off, SEEK_SET); |
| } |
| } while (found_header); |
| ff_metadata_conv(metadata, NULL, ff_id3v2_34_metadata_conv); |
| ff_metadata_conv(metadata, NULL, id3v2_2_metadata_conv); |
| ff_metadata_conv(metadata, NULL, ff_id3v2_4_metadata_conv); |
| merge_date(metadata); |
| } |
| |
| void ff_id3v2_read_dict(AVIOContext *pb, AVDictionary **metadata, |
| const char *magic, ID3v2ExtraMeta **extra_meta) |
| { |
| id3v2_read_internal(pb, metadata, NULL, magic, extra_meta, 0); |
| } |
| |
| void ff_id3v2_read(AVFormatContext *s, const char *magic, |
| ID3v2ExtraMeta **extra_meta, unsigned int max_search_size) |
| { |
| id3v2_read_internal(s->pb, &s->metadata, s, magic, extra_meta, max_search_size); |
| } |
| |
| 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(¤t->data); |
| next = current->next; |
| av_freep(¤t); |
| current = next; |
| } |
| |
| *extra_meta = NULL; |
| } |
| |
| 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.apic; |
| |
| if (!(st = avformat_new_stream(s, NULL))) |
| return AVERROR(ENOMEM); |
| |
| st->disposition |= AV_DISPOSITION_ATTACHED_PIC; |
| st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; |
| st->codecpar->codec_id = apic->id; |
| |
| if (AV_RB64(apic->buf->data) == PNGSIG) |
| st->codecpar->codec_id = AV_CODEC_ID_PNG; |
| |
| if (apic->description[0]) |
| 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.buf = apic->buf; |
| st->attached_pic.data = apic->buf->data; |
| st->attached_pic.size = apic->buf->size - AV_INPUT_BUFFER_PADDING_SIZE; |
| st->attached_pic.stream_index = st->index; |
| st->attached_pic.flags |= AV_PKT_FLAG_KEY; |
| |
| apic->buf = NULL; |
| } |
| |
| return 0; |
| } |
| |
| int ff_id3v2_parse_chapters(AVFormatContext *s, ID3v2ExtraMeta *extra_meta) |
| { |
| int ret = 0; |
| ID3v2ExtraMeta *cur; |
| AVRational time_base = {1, 1000}; |
| ID3v2ExtraMetaCHAP **chapters = NULL; |
| int num_chapters = 0; |
| int i; |
| |
| // since extra_meta is a linked list where elements are prepended, |
| // we need to reverse the order of chapters |
| for (cur = extra_meta; cur; cur = cur->next) { |
| ID3v2ExtraMetaCHAP *chap; |
| |
| if (strcmp(cur->tag, "CHAP")) |
| continue; |
| chap = &cur->data.chap; |
| |
| if ((ret = av_dynarray_add_nofree(&chapters, &num_chapters, chap)) < 0) |
| goto end; |
| } |
| |
| for (i = 0; i < (num_chapters / 2); i++) { |
| ID3v2ExtraMetaCHAP *right; |
| int right_index; |
| |
| right_index = (num_chapters - 1) - i; |
| right = chapters[right_index]; |
| |
| chapters[right_index] = chapters[i]; |
| chapters[i] = right; |
| } |
| |
| for (i = 0; i < num_chapters; i++) { |
| ID3v2ExtraMetaCHAP *chap; |
| AVChapter *chapter; |
| |
| chap = chapters[i]; |
| chapter = avpriv_new_chapter(s, i, time_base, chap->start, chap->end, chap->element_id); |
| if (!chapter) |
| continue; |
| |
| if ((ret = av_dict_copy(&chapter->metadata, chap->meta, 0)) < 0) |
| goto end; |
| } |
| |
| end: |
| av_freep(&chapters); |
| return ret; |
| } |
| |
| int ff_id3v2_parse_priv_dict(AVDictionary **metadata, ID3v2ExtraMeta *extra_meta) |
| { |
| ID3v2ExtraMeta *cur; |
| int dict_flags = AV_DICT_DONT_OVERWRITE | AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL; |
| |
| for (cur = extra_meta; cur; cur = cur->next) { |
| if (!strcmp(cur->tag, "PRIV")) { |
| ID3v2ExtraMetaPRIV *priv = &cur->data.priv; |
| AVBPrint bprint; |
| char *escaped, *key; |
| int i, ret; |
| |
| if ((key = av_asprintf(ID3v2_PRIV_METADATA_PREFIX "%s", priv->owner)) == NULL) { |
| return AVERROR(ENOMEM); |
| } |
| |
| av_bprint_init(&bprint, priv->datasize + 1, AV_BPRINT_SIZE_UNLIMITED); |
| |
| for (i = 0; i < priv->datasize; i++) { |
| if (priv->data[i] < 32 || priv->data[i] > 126 || priv->data[i] == '\\') { |
| av_bprintf(&bprint, "\\x%02x", priv->data[i]); |
| } else { |
| av_bprint_chars(&bprint, priv->data[i], 1); |
| } |
| } |
| |
| if ((ret = av_bprint_finalize(&bprint, &escaped)) < 0) { |
| av_free(key); |
| return ret; |
| } |
| |
| if ((ret = av_dict_set(metadata, key, escaped, dict_flags)) < 0) { |
| return ret; |
| } |
| } |
| } |
| |
| return 0; |
| } |
| |
| int ff_id3v2_parse_priv(AVFormatContext *s, ID3v2ExtraMeta *extra_meta) |
| { |
| return ff_id3v2_parse_priv_dict(&s->metadata, extra_meta); |
| } |
