blob: a3217f02a6b50b48f6a684aebbbfd14e1c8ea70e
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 width, height, ret = 0; |
37 | int len; |
38 | unsigned int type; |
39 | |
40 | pb = avio_alloc_context(buf, buf_size, 0, NULL, NULL, NULL, NULL); |
41 | if (!pb) |
42 | return AVERROR(ENOMEM); |
43 | |
44 | /* read the picture type */ |
45 | type = avio_rb32(pb); |
46 | if (type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types)) { |
47 | av_log(s, AV_LOG_ERROR, "Invalid picture type: %d.\n", type); |
48 | if (s->error_recognition & AV_EF_EXPLODE) { |
49 | RETURN_ERROR(AVERROR_INVALIDDATA); |
50 | } |
51 | type = 0; |
52 | } |
53 | |
54 | /* picture mimetype */ |
55 | len = avio_rb32(pb); |
56 | if (len <= 0 || len >= 64 || |
57 | avio_read(pb, mimetype, FFMIN(len, sizeof(mimetype) - 1)) != len) { |
58 | av_log(s, AV_LOG_ERROR, "Could not read mimetype from an attached " |
59 | "picture.\n"); |
60 | if (s->error_recognition & AV_EF_EXPLODE) |
61 | ret = AVERROR_INVALIDDATA; |
62 | goto fail; |
63 | } |
64 | av_assert0(len < sizeof(mimetype)); |
65 | mimetype[len] = 0; |
66 | |
67 | while (mime->id != AV_CODEC_ID_NONE) { |
68 | if (!strncmp(mime->str, mimetype, sizeof(mimetype))) { |
69 | id = mime->id; |
70 | break; |
71 | } |
72 | mime++; |
73 | } |
74 | if (id == AV_CODEC_ID_NONE) { |
75 | av_log(s, AV_LOG_ERROR, "Unknown attached picture mimetype: %s.\n", |
76 | mimetype); |
77 | if (s->error_recognition & AV_EF_EXPLODE) |
78 | ret = AVERROR_INVALIDDATA; |
79 | goto fail; |
80 | } |
81 | |
82 | /* picture description */ |
83 | len = avio_rb32(pb); |
84 | if (len > 0) { |
85 | if (!(desc = av_malloc(len + 1))) { |
86 | RETURN_ERROR(AVERROR(ENOMEM)); |
87 | } |
88 | |
89 | if (avio_read(pb, desc, len) != len) { |
90 | av_log(s, AV_LOG_ERROR, "Error reading attached picture description.\n"); |
91 | if (s->error_recognition & AV_EF_EXPLODE) |
92 | ret = AVERROR(EIO); |
93 | goto fail; |
94 | } |
95 | desc[len] = 0; |
96 | } |
97 | |
98 | /* picture metadata */ |
99 | width = avio_rb32(pb); |
100 | height = avio_rb32(pb); |
101 | avio_skip(pb, 8); |
102 | |
103 | /* picture data */ |
104 | len = avio_rb32(pb); |
105 | if (len <= 0) { |
106 | av_log(s, AV_LOG_ERROR, "Invalid attached picture size: %d.\n", len); |
107 | if (s->error_recognition & AV_EF_EXPLODE) |
108 | ret = AVERROR_INVALIDDATA; |
109 | goto fail; |
110 | } |
111 | if (!(data = av_buffer_alloc(len + AV_INPUT_BUFFER_PADDING_SIZE))) { |
112 | RETURN_ERROR(AVERROR(ENOMEM)); |
113 | } |
114 | memset(data->data + len, 0, AV_INPUT_BUFFER_PADDING_SIZE); |
115 | if (avio_read(pb, data->data, len) != len) { |
116 | av_log(s, AV_LOG_ERROR, "Error reading attached picture data.\n"); |
117 | if (s->error_recognition & AV_EF_EXPLODE) |
118 | ret = AVERROR(EIO); |
119 | goto fail; |
120 | } |
121 | |
122 | st = avformat_new_stream(s, NULL); |
123 | if (!st) { |
124 | RETURN_ERROR(AVERROR(ENOMEM)); |
125 | } |
126 | |
127 | av_init_packet(&st->attached_pic); |
128 | st->attached_pic.buf = data; |
129 | st->attached_pic.data = data->data; |
130 | st->attached_pic.size = len; |
131 | st->attached_pic.stream_index = st->index; |
132 | st->attached_pic.flags |= AV_PKT_FLAG_KEY; |
133 | |
134 | st->disposition |= AV_DISPOSITION_ATTACHED_PIC; |
135 | st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; |
136 | st->codecpar->codec_id = id; |
137 | st->codecpar->width = width; |
138 | st->codecpar->height = height; |
139 | av_dict_set(&st->metadata, "comment", ff_id3v2_picture_types[type], 0); |
140 | if (desc) |
141 | av_dict_set(&st->metadata, "title", desc, AV_DICT_DONT_STRDUP_VAL); |
142 | |
143 | av_freep(&pb); |
144 | |
145 | return 0; |
146 | |
147 | fail: |
148 | av_buffer_unref(&data); |
149 | av_freep(&desc); |
150 | av_freep(&pb); |
151 | |
152 | return ret; |
153 | } |
154 |