| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Microsoft Windows ICO muxer | ||
| 3 | * Copyright (c) 2012 Michael Bradshaw <mjbshaw gmail com> | ||
| 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 | /** | ||
| 23 | * @file | ||
| 24 | * Microsoft Windows ICO muxer | ||
| 25 | */ | ||
| 26 | |||
| 27 | #include "libavutil/intreadwrite.h" | ||
| 28 | #include "libavutil/mem.h" | ||
| 29 | |||
| 30 | #include "libavcodec/codec_id.h" | ||
| 31 | |||
| 32 | #include "avformat.h" | ||
| 33 | #include "avio_internal.h" | ||
| 34 | #include "mux.h" | ||
| 35 | |||
| 36 | typedef struct { | ||
| 37 | int offset; | ||
| 38 | int size; | ||
| 39 | unsigned char width; | ||
| 40 | unsigned char height; | ||
| 41 | short bits; | ||
| 42 | } IcoImage; | ||
| 43 | |||
| 44 | typedef struct { | ||
| 45 | int current_image; | ||
| 46 | int nb_images; | ||
| 47 | IcoImage *images; | ||
| 48 | } IcoMuxContext; | ||
| 49 | |||
| 50 | ✗ | static int ico_check_attributes(AVFormatContext *s, const AVCodecParameters *p) | |
| 51 | { | ||
| 52 | ✗ | if (p->codec_id == AV_CODEC_ID_BMP) { | |
| 53 | if (p->format == AV_PIX_FMT_PAL8 && AV_PIX_FMT_RGB32 != AV_PIX_FMT_BGRA) { | ||
| 54 | av_log(s, AV_LOG_ERROR, "Wrong endianness for bmp pixel format\n"); | ||
| 55 | return AVERROR(EINVAL); | ||
| 56 | ✗ | } else if (p->format != AV_PIX_FMT_PAL8 && | |
| 57 | ✗ | p->format != AV_PIX_FMT_RGB555LE && | |
| 58 | ✗ | p->format != AV_PIX_FMT_BGR24 && | |
| 59 | ✗ | p->format != AV_PIX_FMT_BGRA) { | |
| 60 | ✗ | av_log(s, AV_LOG_ERROR, "BMP must be 1bit, 4bit, 8bit, 16bit, 24bit, or 32bit\n"); | |
| 61 | ✗ | return AVERROR(EINVAL); | |
| 62 | } | ||
| 63 | ✗ | } else if (p->codec_id == AV_CODEC_ID_PNG) { | |
| 64 | ✗ | if (p->format != AV_PIX_FMT_RGBA) { | |
| 65 | ✗ | av_log(s, AV_LOG_ERROR, "PNG in ico requires pixel format to be rgba\n"); | |
| 66 | ✗ | return AVERROR(EINVAL); | |
| 67 | } | ||
| 68 | } else { | ||
| 69 | ✗ | av_log(s, AV_LOG_ERROR, "Unsupported codec %s\n", avcodec_get_name(p->codec_id)); | |
| 70 | ✗ | return AVERROR(EINVAL); | |
| 71 | } | ||
| 72 | |||
| 73 | ✗ | if (p->width > 256 || | |
| 74 | ✗ | p->height > 256) { | |
| 75 | ✗ | av_log(s, AV_LOG_ERROR, "Unsupported dimensions %dx%d (dimensions cannot exceed 256x256)\n", p->width, p->height); | |
| 76 | ✗ | return AVERROR(EINVAL); | |
| 77 | } | ||
| 78 | |||
| 79 | ✗ | return 0; | |
| 80 | } | ||
| 81 | |||
| 82 | ✗ | static int ico_write_header(AVFormatContext *s) | |
| 83 | { | ||
| 84 | ✗ | IcoMuxContext *ico = s->priv_data; | |
| 85 | ✗ | AVIOContext *pb = s->pb; | |
| 86 | int ret; | ||
| 87 | int i; | ||
| 88 | |||
| 89 | ✗ | if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) { | |
| 90 | ✗ | av_log(s, AV_LOG_ERROR, "Output is not seekable\n"); | |
| 91 | ✗ | return AVERROR(EINVAL); | |
| 92 | } | ||
| 93 | |||
| 94 | ✗ | ico->current_image = 0; | |
| 95 | ✗ | ico->nb_images = s->nb_streams; | |
| 96 | |||
| 97 | ✗ | avio_wl16(pb, 0); // reserved | |
| 98 | ✗ | avio_wl16(pb, 1); // 1 == icon | |
| 99 | ✗ | avio_skip(pb, 2); // skip the number of images | |
| 100 | |||
| 101 | ✗ | for (i = 0; i < s->nb_streams; i++) { | |
| 102 | ✗ | if (ret = ico_check_attributes(s, s->streams[i]->codecpar)) | |
| 103 | ✗ | return ret; | |
| 104 | |||
| 105 | // Fill in later when writing trailer... | ||
| 106 | ✗ | avio_skip(pb, 16); | |
| 107 | } | ||
| 108 | |||
| 109 | ✗ | ico->images = av_calloc(ico->nb_images, sizeof(*ico->images)); | |
| 110 | ✗ | if (!ico->images) | |
| 111 | ✗ | return AVERROR(ENOMEM); | |
| 112 | |||
| 113 | ✗ | return 0; | |
| 114 | } | ||
| 115 | |||
| 116 | ✗ | static int ico_write_packet(AVFormatContext *s, AVPacket *pkt) | |
| 117 | { | ||
| 118 | ✗ | IcoMuxContext *ico = s->priv_data; | |
| 119 | IcoImage *image; | ||
| 120 | ✗ | AVIOContext *pb = s->pb; | |
| 121 | ✗ | AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar; | |
| 122 | |||
| 123 | ✗ | if (ico->current_image >= ico->nb_images) { | |
| 124 | ✗ | av_log(s, AV_LOG_ERROR, "ICO already contains %d images\n", ico->current_image); | |
| 125 | ✗ | return AVERROR_INVALIDDATA; | |
| 126 | } | ||
| 127 | |||
| 128 | ✗ | image = &ico->images[ico->current_image++]; | |
| 129 | |||
| 130 | ✗ | image->offset = avio_tell(pb); | |
| 131 | ✗ | image->width = (par->width == 256) ? 0 : par->width; | |
| 132 | ✗ | image->height = (par->height == 256) ? 0 : par->height; | |
| 133 | |||
| 134 | ✗ | if (par->codec_id == AV_CODEC_ID_PNG) { | |
| 135 | ✗ | image->bits = par->bits_per_coded_sample; | |
| 136 | ✗ | image->size = pkt->size; | |
| 137 | |||
| 138 | ✗ | avio_write(pb, pkt->data, pkt->size); | |
| 139 | } else { // BMP | ||
| 140 | ✗ | if (AV_RL32(pkt->data + 14) != 40) { // must be BITMAPINFOHEADER | |
| 141 | ✗ | av_log(s, AV_LOG_ERROR, "Invalid BMP\n"); | |
| 142 | ✗ | return AVERROR(EINVAL); | |
| 143 | } | ||
| 144 | |||
| 145 | ✗ | image->bits = AV_RL16(pkt->data + 28); // allows things like 1bit and 4bit images to be preserved | |
| 146 | ✗ | image->size = pkt->size - 14 + par->height * (par->width + 7) / 8; | |
| 147 | |||
| 148 | ✗ | avio_write(pb, pkt->data + 14, 8); // Skip the BITMAPFILEHEADER header | |
| 149 | ✗ | avio_wl32(pb, AV_RL32(pkt->data + 22) * 2); // rewrite height as 2 * height | |
| 150 | ✗ | avio_write(pb, pkt->data + 26, pkt->size - 26); | |
| 151 | |||
| 152 | // Write bitmask (opaque) | ||
| 153 | ✗ | ffio_fill(pb, 0x00, par->height * (par->width + 7) / 8); | |
| 154 | } | ||
| 155 | |||
| 156 | ✗ | return 0; | |
| 157 | } | ||
| 158 | |||
| 159 | ✗ | static int ico_write_trailer(AVFormatContext *s) | |
| 160 | { | ||
| 161 | ✗ | IcoMuxContext *ico = s->priv_data; | |
| 162 | ✗ | AVIOContext *pb = s->pb; | |
| 163 | int i; | ||
| 164 | |||
| 165 | ✗ | avio_seek(pb, 4, SEEK_SET); | |
| 166 | |||
| 167 | ✗ | avio_wl16(pb, ico->current_image); | |
| 168 | |||
| 169 | ✗ | for (i = 0; i < ico->nb_images; i++) { | |
| 170 | ✗ | avio_w8(pb, ico->images[i].width); | |
| 171 | ✗ | avio_w8(pb, ico->images[i].height); | |
| 172 | |||
| 173 | ✗ | if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_BMP && | |
| 174 | ✗ | s->streams[i]->codecpar->format == AV_PIX_FMT_PAL8) { | |
| 175 | ✗ | avio_w8(pb, (ico->images[i].bits >= 8) ? 0 : 1 << ico->images[i].bits); | |
| 176 | } else { | ||
| 177 | ✗ | avio_w8(pb, 0); | |
| 178 | } | ||
| 179 | |||
| 180 | ✗ | avio_w8(pb, 0); // reserved | |
| 181 | ✗ | avio_wl16(pb, 1); // color planes | |
| 182 | ✗ | avio_wl16(pb, ico->images[i].bits); | |
| 183 | ✗ | avio_wl32(pb, ico->images[i].size); | |
| 184 | ✗ | avio_wl32(pb, ico->images[i].offset); | |
| 185 | } | ||
| 186 | |||
| 187 | ✗ | return 0; | |
| 188 | } | ||
| 189 | |||
| 190 | ✗ | static void ico_deinit(AVFormatContext *s) | |
| 191 | { | ||
| 192 | ✗ | IcoMuxContext *ico = s->priv_data; | |
| 193 | |||
| 194 | ✗ | av_freep(&ico->images); | |
| 195 | ✗ | } | |
| 196 | |||
| 197 | const FFOutputFormat ff_ico_muxer = { | ||
| 198 | .p.name = "ico", | ||
| 199 | .p.long_name = NULL_IF_CONFIG_SMALL("Microsoft Windows ICO"), | ||
| 200 | .priv_data_size = sizeof(IcoMuxContext), | ||
| 201 | .p.mime_type = "image/vnd.microsoft.icon", | ||
| 202 | .p.extensions = "ico", | ||
| 203 | .p.audio_codec = AV_CODEC_ID_NONE, | ||
| 204 | .p.video_codec = AV_CODEC_ID_BMP, | ||
| 205 | .write_header = ico_write_header, | ||
| 206 | .write_packet = ico_write_packet, | ||
| 207 | .write_trailer = ico_write_trailer, | ||
| 208 | .deinit = ico_deinit, | ||
| 209 | .p.flags = AVFMT_NOTIMESTAMPS, | ||
| 210 | }; | ||
| 211 |