| 1 | /* |
| 2 | * XWD image format |
| 3 | * |
| 4 | * Copyright (c) 2012 Paul B Mahol |
| 5 | * |
| 6 | * This file is part of FFmpeg. |
| 7 | * |
| 8 | * FFmpeg is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU Lesser General Public |
| 10 | * License as published by the Free Software Foundation; either |
| 11 | * version 2.1 of the License, or (at your option) any later version. |
| 12 | * |
| 13 | * FFmpeg is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | * Lesser General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU Lesser General Public |
| 19 | * License along with FFmpeg; if not, write to the Free Software |
| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 21 | */ |
| 22 | |
| 23 | #include "libavutil/intreadwrite.h" |
| 24 | #include "libavutil/pixdesc.h" |
| 25 | #include "avcodec.h" |
| 26 | #include "bytestream.h" |
| 27 | #include "internal.h" |
| 28 | #include "xwd.h" |
| 29 | |
| 30 | #define WINDOW_NAME "lavcxwdenc" |
| 31 | #define WINDOW_NAME_SIZE 11 |
| 32 | |
| 33 | static int xwd_encode_frame(AVCodecContext *avctx, AVPacket *pkt, |
| 34 | const AVFrame *pict, int *got_packet) |
| 35 | { |
| 36 | enum AVPixelFormat pix_fmt = avctx->pix_fmt; |
| 37 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); |
| 38 | uint32_t pixdepth, bpp, bpad, ncolors = 0, lsize, vclass, be = 0; |
| 39 | uint32_t rgb[3] = { 0 }, bitorder = 0; |
| 40 | uint32_t header_size; |
| 41 | int i, out_size, ret; |
| 42 | uint8_t *ptr, *buf; |
| 43 | AVFrame * const p = (AVFrame *)pict; |
| 44 | |
| 45 | pixdepth = av_get_bits_per_pixel(desc); |
| 46 | if (desc->flags & AV_PIX_FMT_FLAG_BE) |
| 47 | be = 1; |
| 48 | switch (pix_fmt) { |
| 49 | case AV_PIX_FMT_ARGB: |
| 50 | case AV_PIX_FMT_BGRA: |
| 51 | case AV_PIX_FMT_RGBA: |
| 52 | case AV_PIX_FMT_ABGR: |
| 53 | if (pix_fmt == AV_PIX_FMT_ARGB || |
| 54 | pix_fmt == AV_PIX_FMT_ABGR) |
| 55 | be = 1; |
| 56 | if (pix_fmt == AV_PIX_FMT_ABGR || |
| 57 | pix_fmt == AV_PIX_FMT_RGBA) { |
| 58 | rgb[0] = 0xFF; |
| 59 | rgb[1] = 0xFF00; |
| 60 | rgb[2] = 0xFF0000; |
| 61 | } else { |
| 62 | rgb[0] = 0xFF0000; |
| 63 | rgb[1] = 0xFF00; |
| 64 | rgb[2] = 0xFF; |
| 65 | } |
| 66 | bpp = 32; |
| 67 | pixdepth = 24; |
| 68 | vclass = XWD_TRUE_COLOR; |
| 69 | bpad = 32; |
| 70 | break; |
| 71 | case AV_PIX_FMT_BGR24: |
| 72 | case AV_PIX_FMT_RGB24: |
| 73 | if (pix_fmt == AV_PIX_FMT_RGB24) |
| 74 | be = 1; |
| 75 | bpp = 24; |
| 76 | vclass = XWD_TRUE_COLOR; |
| 77 | bpad = 32; |
| 78 | rgb[0] = 0xFF0000; |
| 79 | rgb[1] = 0xFF00; |
| 80 | rgb[2] = 0xFF; |
| 81 | break; |
| 82 | case AV_PIX_FMT_RGB565LE: |
| 83 | case AV_PIX_FMT_RGB565BE: |
| 84 | case AV_PIX_FMT_BGR565LE: |
| 85 | case AV_PIX_FMT_BGR565BE: |
| 86 | if (pix_fmt == AV_PIX_FMT_BGR565LE || |
| 87 | pix_fmt == AV_PIX_FMT_BGR565BE) { |
| 88 | rgb[0] = 0x1F; |
| 89 | rgb[1] = 0x7E0; |
| 90 | rgb[2] = 0xF800; |
| 91 | } else { |
| 92 | rgb[0] = 0xF800; |
| 93 | rgb[1] = 0x7E0; |
| 94 | rgb[2] = 0x1F; |
| 95 | } |
| 96 | bpp = 16; |
| 97 | vclass = XWD_TRUE_COLOR; |
| 98 | bpad = 16; |
| 99 | break; |
| 100 | case AV_PIX_FMT_RGB555LE: |
| 101 | case AV_PIX_FMT_RGB555BE: |
| 102 | case AV_PIX_FMT_BGR555LE: |
| 103 | case AV_PIX_FMT_BGR555BE: |
| 104 | if (pix_fmt == AV_PIX_FMT_BGR555LE || |
| 105 | pix_fmt == AV_PIX_FMT_BGR555BE) { |
| 106 | rgb[0] = 0x1F; |
| 107 | rgb[1] = 0x3E0; |
| 108 | rgb[2] = 0x7C00; |
| 109 | } else { |
| 110 | rgb[0] = 0x7C00; |
| 111 | rgb[1] = 0x3E0; |
| 112 | rgb[2] = 0x1F; |
| 113 | } |
| 114 | bpp = 16; |
| 115 | vclass = XWD_TRUE_COLOR; |
| 116 | bpad = 16; |
| 117 | break; |
| 118 | case AV_PIX_FMT_RGB8: |
| 119 | case AV_PIX_FMT_BGR8: |
| 120 | case AV_PIX_FMT_RGB4_BYTE: |
| 121 | case AV_PIX_FMT_BGR4_BYTE: |
| 122 | case AV_PIX_FMT_PAL8: |
| 123 | bpp = 8; |
| 124 | vclass = XWD_PSEUDO_COLOR; |
| 125 | bpad = 8; |
| 126 | ncolors = 256; |
| 127 | break; |
| 128 | case AV_PIX_FMT_GRAY8: |
| 129 | bpp = 8; |
| 130 | bpad = 8; |
| 131 | vclass = XWD_STATIC_GRAY; |
| 132 | break; |
| 133 | case AV_PIX_FMT_MONOWHITE: |
| 134 | be = 1; |
| 135 | bitorder = 1; |
| 136 | bpp = 1; |
| 137 | bpad = 8; |
| 138 | vclass = XWD_STATIC_GRAY; |
| 139 | break; |
| 140 | default: |
| 141 | av_log(avctx, AV_LOG_ERROR, "unsupported pixel format\n"); |
| 142 | return AVERROR(EINVAL); |
| 143 | } |
| 144 | |
| 145 | lsize = FFALIGN(bpp * avctx->width, bpad) / 8; |
| 146 | header_size = XWD_HEADER_SIZE + WINDOW_NAME_SIZE; |
| 147 | out_size = header_size + ncolors * XWD_CMAP_SIZE + avctx->height * lsize; |
| 148 | |
| 149 | if ((ret = ff_alloc_packet2(avctx, pkt, out_size)) < 0) |
| 150 | return ret; |
| 151 | buf = pkt->data; |
| 152 | |
| 153 | p->key_frame = 1; |
| 154 | p->pict_type = AV_PICTURE_TYPE_I; |
| 155 | |
| 156 | bytestream_put_be32(&buf, header_size); |
| 157 | bytestream_put_be32(&buf, XWD_VERSION); // file version |
| 158 | bytestream_put_be32(&buf, XWD_Z_PIXMAP); // pixmap format |
| 159 | bytestream_put_be32(&buf, pixdepth); // pixmap depth in pixels |
| 160 | bytestream_put_be32(&buf, avctx->width); // pixmap width in pixels |
| 161 | bytestream_put_be32(&buf, avctx->height); // pixmap height in pixels |
| 162 | bytestream_put_be32(&buf, 0); // bitmap x offset |
| 163 | bytestream_put_be32(&buf, be); // byte order |
| 164 | bytestream_put_be32(&buf, 32); // bitmap unit |
| 165 | bytestream_put_be32(&buf, bitorder); // bit-order of image data |
| 166 | bytestream_put_be32(&buf, bpad); // bitmap scan-line pad in bits |
| 167 | bytestream_put_be32(&buf, bpp); // bits per pixel |
| 168 | bytestream_put_be32(&buf, lsize); // bytes per scan-line |
| 169 | bytestream_put_be32(&buf, vclass); // visual class |
| 170 | bytestream_put_be32(&buf, rgb[0]); // red mask |
| 171 | bytestream_put_be32(&buf, rgb[1]); // green mask |
| 172 | bytestream_put_be32(&buf, rgb[2]); // blue mask |
| 173 | bytestream_put_be32(&buf, 8); // size of each bitmask in bits |
| 174 | bytestream_put_be32(&buf, ncolors); // number of colors |
| 175 | bytestream_put_be32(&buf, ncolors); // number of entries in color map |
| 176 | bytestream_put_be32(&buf, avctx->width); // window width |
| 177 | bytestream_put_be32(&buf, avctx->height); // window height |
| 178 | bytestream_put_be32(&buf, 0); // window upper left X coordinate |
| 179 | bytestream_put_be32(&buf, 0); // window upper left Y coordinate |
| 180 | bytestream_put_be32(&buf, 0); // window border width |
| 181 | bytestream_put_buffer(&buf, WINDOW_NAME, WINDOW_NAME_SIZE); |
| 182 | |
| 183 | for (i = 0; i < ncolors; i++) { |
| 184 | uint32_t val; |
| 185 | uint8_t red, green, blue; |
| 186 | |
| 187 | val = AV_RN32A(p->data[1] + i * 4); |
| 188 | red = (val >> 16) & 0xFF; |
| 189 | green = (val >> 8) & 0xFF; |
| 190 | blue = val & 0xFF; |
| 191 | |
| 192 | bytestream_put_be32(&buf, i); // colormap entry number |
| 193 | bytestream_put_be16(&buf, red << 8); |
| 194 | bytestream_put_be16(&buf, green << 8); |
| 195 | bytestream_put_be16(&buf, blue << 8); |
| 196 | bytestream_put_byte(&buf, 0x7); // bitmask flag |
| 197 | bytestream_put_byte(&buf, 0); // padding |
| 198 | } |
| 199 | |
| 200 | ptr = p->data[0]; |
| 201 | for (i = 0; i < avctx->height; i++) { |
| 202 | bytestream_put_buffer(&buf, ptr, lsize); |
| 203 | ptr += p->linesize[0]; |
| 204 | } |
| 205 | |
| 206 | pkt->flags |= AV_PKT_FLAG_KEY; |
| 207 | *got_packet = 1; |
| 208 | return 0; |
| 209 | } |
| 210 | |
| 211 | AVCodec ff_xwd_encoder = { |
| 212 | .name = "xwd", |
| 213 | .long_name = NULL_IF_CONFIG_SMALL("XWD (X Window Dump) image"), |
| 214 | .type = AVMEDIA_TYPE_VIDEO, |
| 215 | .id = AV_CODEC_ID_XWD, |
| 216 | .encode2 = xwd_encode_frame, |
| 217 | .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_BGRA, |
| 218 | AV_PIX_FMT_RGBA, |
| 219 | AV_PIX_FMT_ARGB, |
| 220 | AV_PIX_FMT_ABGR, |
| 221 | AV_PIX_FMT_RGB24, |
| 222 | AV_PIX_FMT_BGR24, |
| 223 | AV_PIX_FMT_RGB565BE, |
| 224 | AV_PIX_FMT_RGB565LE, |
| 225 | AV_PIX_FMT_BGR565BE, |
| 226 | AV_PIX_FMT_BGR565LE, |
| 227 | AV_PIX_FMT_RGB555BE, |
| 228 | AV_PIX_FMT_RGB555LE, |
| 229 | AV_PIX_FMT_BGR555BE, |
| 230 | AV_PIX_FMT_BGR555LE, |
| 231 | AV_PIX_FMT_RGB8, |
| 232 | AV_PIX_FMT_BGR8, |
| 233 | AV_PIX_FMT_RGB4_BYTE, |
| 234 | AV_PIX_FMT_BGR4_BYTE, |
| 235 | AV_PIX_FMT_PAL8, |
| 236 | AV_PIX_FMT_GRAY8, |
| 237 | AV_PIX_FMT_MONOWHITE, |
| 238 | AV_PIX_FMT_NONE }, |
| 239 | }; |