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/* |
* XWD image format |
* |
* Copyright (c) 2012 Paul B Mahol |
* |
* 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 |
*/ |
|
#include "libavutil/intreadwrite.h" |
#include "libavutil/pixdesc.h" |
#include "avcodec.h" |
#include "bytestream.h" |
#include "internal.h" |
#include "xwd.h" |
|
#define WINDOW_NAME "lavcxwdenc" |
#define WINDOW_NAME_SIZE 11 |
|
static int xwd_encode_frame(AVCodecContext *avctx, AVPacket *pkt, |
const AVFrame *pict, int *got_packet) |
{ |
enum AVPixelFormat pix_fmt = avctx->pix_fmt; |
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); |
uint32_t pixdepth, bpp, bpad, ncolors = 0, lsize, vclass, be = 0; |
uint32_t rgb[3] = { 0 }, bitorder = 0; |
uint32_t header_size; |
int i, out_size, ret; |
uint8_t *ptr, *buf; |
AVFrame * const p = (AVFrame *)pict; |
|
pixdepth = av_get_bits_per_pixel(desc); |
if (desc->flags & AV_PIX_FMT_FLAG_BE) |
be = 1; |
switch (pix_fmt) { |
case AV_PIX_FMT_ARGB: |
case AV_PIX_FMT_BGRA: |
case AV_PIX_FMT_RGBA: |
case AV_PIX_FMT_ABGR: |
if (pix_fmt == AV_PIX_FMT_ARGB || |
pix_fmt == AV_PIX_FMT_ABGR) |
be = 1; |
if (pix_fmt == AV_PIX_FMT_ABGR || |
pix_fmt == AV_PIX_FMT_RGBA) { |
rgb[0] = 0xFF; |
rgb[1] = 0xFF00; |
rgb[2] = 0xFF0000; |
} else { |
rgb[0] = 0xFF0000; |
rgb[1] = 0xFF00; |
rgb[2] = 0xFF; |
} |
bpp = 32; |
pixdepth = 24; |
vclass = XWD_TRUE_COLOR; |
bpad = 32; |
break; |
case AV_PIX_FMT_BGR24: |
case AV_PIX_FMT_RGB24: |
if (pix_fmt == AV_PIX_FMT_RGB24) |
be = 1; |
bpp = 24; |
vclass = XWD_TRUE_COLOR; |
bpad = 32; |
rgb[0] = 0xFF0000; |
rgb[1] = 0xFF00; |
rgb[2] = 0xFF; |
break; |
case AV_PIX_FMT_RGB565LE: |
case AV_PIX_FMT_RGB565BE: |
case AV_PIX_FMT_BGR565LE: |
case AV_PIX_FMT_BGR565BE: |
if (pix_fmt == AV_PIX_FMT_BGR565LE || |
pix_fmt == AV_PIX_FMT_BGR565BE) { |
rgb[0] = 0x1F; |
rgb[1] = 0x7E0; |
rgb[2] = 0xF800; |
} else { |
rgb[0] = 0xF800; |
rgb[1] = 0x7E0; |
rgb[2] = 0x1F; |
} |
bpp = 16; |
vclass = XWD_TRUE_COLOR; |
bpad = 16; |
break; |
case AV_PIX_FMT_RGB555LE: |
case AV_PIX_FMT_RGB555BE: |
case AV_PIX_FMT_BGR555LE: |
case AV_PIX_FMT_BGR555BE: |
if (pix_fmt == AV_PIX_FMT_BGR555LE || |
pix_fmt == AV_PIX_FMT_BGR555BE) { |
rgb[0] = 0x1F; |
rgb[1] = 0x3E0; |
rgb[2] = 0x7C00; |
} else { |
rgb[0] = 0x7C00; |
rgb[1] = 0x3E0; |
rgb[2] = 0x1F; |
} |
bpp = 16; |
vclass = XWD_TRUE_COLOR; |
bpad = 16; |
break; |
case AV_PIX_FMT_RGB8: |
case AV_PIX_FMT_BGR8: |
case AV_PIX_FMT_RGB4_BYTE: |
case AV_PIX_FMT_BGR4_BYTE: |
case AV_PIX_FMT_PAL8: |
bpp = 8; |
vclass = XWD_PSEUDO_COLOR; |
bpad = 8; |
ncolors = 256; |
break; |
case AV_PIX_FMT_GRAY8: |
bpp = 8; |
bpad = 8; |
vclass = XWD_STATIC_GRAY; |
break; |
case AV_PIX_FMT_MONOWHITE: |
be = 1; |
bitorder = 1; |
bpp = 1; |
bpad = 8; |
vclass = XWD_STATIC_GRAY; |
break; |
default: |
av_log(avctx, AV_LOG_ERROR, "unsupported pixel format\n"); |
return AVERROR(EINVAL); |
} |
|
lsize = FFALIGN(bpp * avctx->width, bpad) / 8; |
header_size = XWD_HEADER_SIZE + WINDOW_NAME_SIZE; |
out_size = header_size + ncolors * XWD_CMAP_SIZE + avctx->height * lsize; |
|
if ((ret = ff_alloc_packet2(avctx, pkt, out_size, 0)) < 0) |
return ret; |
buf = pkt->data; |
|
p->key_frame = 1; |
p->pict_type = AV_PICTURE_TYPE_I; |
|
bytestream_put_be32(&buf, header_size); |
bytestream_put_be32(&buf, XWD_VERSION); // file version |
bytestream_put_be32(&buf, XWD_Z_PIXMAP); // pixmap format |
bytestream_put_be32(&buf, pixdepth); // pixmap depth in pixels |
bytestream_put_be32(&buf, avctx->width); // pixmap width in pixels |
bytestream_put_be32(&buf, avctx->height); // pixmap height in pixels |
bytestream_put_be32(&buf, 0); // bitmap x offset |
bytestream_put_be32(&buf, be); // byte order |
bytestream_put_be32(&buf, 32); // bitmap unit |
bytestream_put_be32(&buf, bitorder); // bit-order of image data |
bytestream_put_be32(&buf, bpad); // bitmap scan-line pad in bits |
bytestream_put_be32(&buf, bpp); // bits per pixel |
bytestream_put_be32(&buf, lsize); // bytes per scan-line |
bytestream_put_be32(&buf, vclass); // visual class |
bytestream_put_be32(&buf, rgb[0]); // red mask |
bytestream_put_be32(&buf, rgb[1]); // green mask |
bytestream_put_be32(&buf, rgb[2]); // blue mask |
bytestream_put_be32(&buf, 8); // size of each bitmask in bits |
bytestream_put_be32(&buf, ncolors); // number of colors |
bytestream_put_be32(&buf, ncolors); // number of entries in color map |
bytestream_put_be32(&buf, avctx->width); // window width |
bytestream_put_be32(&buf, avctx->height); // window height |
bytestream_put_be32(&buf, 0); // window upper left X coordinate |
bytestream_put_be32(&buf, 0); // window upper left Y coordinate |
bytestream_put_be32(&buf, 0); // window border width |
bytestream_put_buffer(&buf, WINDOW_NAME, WINDOW_NAME_SIZE); |
|
for (i = 0; i < ncolors; i++) { |
uint32_t val; |
uint8_t red, green, blue; |
|
val = AV_RN32A(p->data[1] + i * 4); |
red = (val >> 16) & 0xFF; |
green = (val >> 8) & 0xFF; |
blue = val & 0xFF; |
|
bytestream_put_be32(&buf, i); // colormap entry number |
bytestream_put_be16(&buf, red << 8); |
bytestream_put_be16(&buf, green << 8); |
bytestream_put_be16(&buf, blue << 8); |
bytestream_put_byte(&buf, 0x7); // bitmask flag |
bytestream_put_byte(&buf, 0); // padding |
} |
|
ptr = p->data[0]; |
for (i = 0; i < avctx->height; i++) { |
bytestream_put_buffer(&buf, ptr, lsize); |
ptr += p->linesize[0]; |
} |
|
pkt->flags |= AV_PKT_FLAG_KEY; |
*got_packet = 1; |
return 0; |
} |
|
AVCodec ff_xwd_encoder = { |
.name = "xwd", |
.long_name = NULL_IF_CONFIG_SMALL("XWD (X Window Dump) image"), |
.type = AVMEDIA_TYPE_VIDEO, |
.id = AV_CODEC_ID_XWD, |
.encode2 = xwd_encode_frame, |
.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_BGRA, |
AV_PIX_FMT_RGBA, |
AV_PIX_FMT_ARGB, |
AV_PIX_FMT_ABGR, |
AV_PIX_FMT_RGB24, |
AV_PIX_FMT_BGR24, |
AV_PIX_FMT_RGB565BE, |
AV_PIX_FMT_RGB565LE, |
AV_PIX_FMT_BGR565BE, |
AV_PIX_FMT_BGR565LE, |
AV_PIX_FMT_RGB555BE, |
AV_PIX_FMT_RGB555LE, |
AV_PIX_FMT_BGR555BE, |
AV_PIX_FMT_BGR555LE, |
AV_PIX_FMT_RGB8, |
AV_PIX_FMT_BGR8, |
AV_PIX_FMT_RGB4_BYTE, |
AV_PIX_FMT_BGR4_BYTE, |
AV_PIX_FMT_PAL8, |
AV_PIX_FMT_GRAY8, |
AV_PIX_FMT_MONOWHITE, |
AV_PIX_FMT_NONE }, |
}; |