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2ba45a60 DM |
1 | /* |
2 | * Raw FLAC picture parser | |
3 | * Copyright (c) 2001 Fabrice Bellard | |
4 | * | |
5 | * This file is part of FFmpeg. | |
6 | * | |
7 | * FFmpeg is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU Lesser General Public | |
9 | * License as published by the Free Software Foundation; either | |
10 | * version 2.1 of the License, or (at your option) any later version. | |
11 | * | |
12 | * FFmpeg is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public | |
18 | * License along with FFmpeg; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
20 | */ | |
21 | ||
22 | #include "libavutil/avassert.h" | |
23 | #include "avformat.h" | |
24 | #include "flac_picture.h" | |
25 | #include "id3v2.h" | |
26 | #include "internal.h" | |
27 | ||
28 | int ff_flac_parse_picture(AVFormatContext *s, uint8_t *buf, int buf_size) | |
29 | { | |
30 | const CodecMime *mime = ff_id3v2_mime_tags; | |
31 | enum AVCodecID id = AV_CODEC_ID_NONE; | |
32 | AVBufferRef *data = NULL; | |
33 | uint8_t mimetype[64], *desc = NULL; | |
34 | AVIOContext *pb = NULL; | |
35 | AVStream *st; | |
36 | int type, width, height; | |
37 | int len, ret = 0; | |
38 | ||
39 | pb = avio_alloc_context(buf, buf_size, 0, NULL, NULL, NULL, NULL); | |
40 | if (!pb) | |
41 | return AVERROR(ENOMEM); | |
42 | ||
43 | /* read the picture type */ | |
44 | type = avio_rb32(pb); | |
45 | if (type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types) || type < 0) { | |
46 | av_log(s, AV_LOG_ERROR, "Invalid picture type: %d.\n", type); | |
47 | if (s->error_recognition & AV_EF_EXPLODE) { | |
48 | RETURN_ERROR(AVERROR_INVALIDDATA); | |
49 | } | |
50 | type = 0; | |
51 | } | |
52 | ||
53 | /* picture mimetype */ | |
54 | len = avio_rb32(pb); | |
55 | if (len <= 0 || | |
56 | avio_read(pb, mimetype, FFMIN(len, sizeof(mimetype) - 1)) != len) { | |
57 | av_log(s, AV_LOG_ERROR, "Could not read mimetype from an attached " | |
58 | "picture.\n"); | |
59 | if (s->error_recognition & AV_EF_EXPLODE) | |
60 | ret = AVERROR_INVALIDDATA; | |
61 | goto fail; | |
62 | } | |
63 | av_assert0(len < sizeof(mimetype)); | |
64 | mimetype[len] = 0; | |
65 | ||
66 | while (mime->id != AV_CODEC_ID_NONE) { | |
67 | if (!strncmp(mime->str, mimetype, sizeof(mimetype))) { | |
68 | id = mime->id; | |
69 | break; | |
70 | } | |
71 | mime++; | |
72 | } | |
73 | if (id == AV_CODEC_ID_NONE) { | |
74 | av_log(s, AV_LOG_ERROR, "Unknown attached picture mimetype: %s.\n", | |
75 | mimetype); | |
76 | if (s->error_recognition & AV_EF_EXPLODE) | |
77 | ret = AVERROR_INVALIDDATA; | |
78 | goto fail; | |
79 | } | |
80 | ||
81 | /* picture description */ | |
82 | len = avio_rb32(pb); | |
83 | if (len > 0) { | |
84 | if (!(desc = av_malloc(len + 1))) { | |
85 | RETURN_ERROR(AVERROR(ENOMEM)); | |
86 | } | |
87 | ||
88 | if (avio_read(pb, desc, len) != len) { | |
89 | av_log(s, AV_LOG_ERROR, "Error reading attached picture description.\n"); | |
90 | if (s->error_recognition & AV_EF_EXPLODE) | |
91 | ret = AVERROR(EIO); | |
92 | goto fail; | |
93 | } | |
94 | desc[len] = 0; | |
95 | } | |
96 | ||
97 | /* picture metadata */ | |
98 | width = avio_rb32(pb); | |
99 | height = avio_rb32(pb); | |
100 | avio_skip(pb, 8); | |
101 | ||
102 | /* picture data */ | |
103 | len = avio_rb32(pb); | |
104 | if (len <= 0) { | |
105 | av_log(s, AV_LOG_ERROR, "Invalid attached picture size: %d.\n", len); | |
106 | if (s->error_recognition & AV_EF_EXPLODE) | |
107 | ret = AVERROR_INVALIDDATA; | |
108 | goto fail; | |
109 | } | |
110 | if (!(data = av_buffer_alloc(len + FF_INPUT_BUFFER_PADDING_SIZE))) { | |
111 | RETURN_ERROR(AVERROR(ENOMEM)); | |
112 | } | |
113 | memset(data->data + len, 0, FF_INPUT_BUFFER_PADDING_SIZE); | |
114 | if (avio_read(pb, data->data, len) != len) { | |
115 | av_log(s, AV_LOG_ERROR, "Error reading attached picture data.\n"); | |
116 | if (s->error_recognition & AV_EF_EXPLODE) | |
117 | ret = AVERROR(EIO); | |
118 | goto fail; | |
119 | } | |
120 | ||
121 | st = avformat_new_stream(s, NULL); | |
122 | if (!st) { | |
123 | RETURN_ERROR(AVERROR(ENOMEM)); | |
124 | } | |
125 | ||
126 | av_init_packet(&st->attached_pic); | |
127 | st->attached_pic.buf = data; | |
128 | st->attached_pic.data = data->data; | |
129 | st->attached_pic.size = len; | |
130 | st->attached_pic.stream_index = st->index; | |
131 | st->attached_pic.flags |= AV_PKT_FLAG_KEY; | |
132 | ||
133 | st->disposition |= AV_DISPOSITION_ATTACHED_PIC; | |
134 | st->codec->codec_type = AVMEDIA_TYPE_VIDEO; | |
135 | st->codec->codec_id = id; | |
136 | st->codec->width = width; | |
137 | st->codec->height = height; | |
138 | av_dict_set(&st->metadata, "comment", ff_id3v2_picture_types[type], 0); | |
139 | if (desc) | |
140 | av_dict_set(&st->metadata, "title", desc, AV_DICT_DONT_STRDUP_VAL); | |
141 | ||
142 | av_freep(&pb); | |
143 | ||
144 | return 0; | |
145 | ||
146 | fail: | |
147 | av_buffer_unref(&data); | |
148 | av_freep(&desc); | |
149 | av_freep(&pb); | |
150 | ||
151 | return ret; | |
152 | } |