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xwdenc.c
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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 
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;
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:
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;
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;
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 
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,
238  AV_PIX_FMT_NONE },
239 };
int ff_alloc_packet2(AVCodecContext *avctx, AVPacket *avpkt, int64_t size)
Check AVPacket size and/or allocate data.
Definition: utils.c:1743
const char const char void * val
Definition: avisynth_c.h:634
static enum AVPixelFormat pix_fmt
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2090
This structure describes decoded (raw) audio or video data.
Definition: frame.h:171
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:65
int av_get_bits_per_pixel(const AVPixFmtDescriptor *pixdesc)
Return the number of bits per pixel used by the pixel format described by pixdesc.
Definition: pixdesc.c:2042
packed RGB 5:5:5, 16bpp, (msb)1X 5R 5G 5B(lsb), little-endian, X=unused/undefined ...
Definition: pixfmt.h:117
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1471
packed BGR 5:6:5, 16bpp, (msb) 5B 6G 5R(lsb), little-endian
Definition: pixfmt.h:120
static AVPacket pkt
AVCodec.
Definition: avcodec.h:3206
#define FFALIGN(x, a)
Definition: common.h:71
packed RGB 5:6:5, 16bpp, (msb) 5R 6G 5B(lsb), little-endian
Definition: pixfmt.h:115
packed RGB 1:2:1, 8bpp, (msb)1B 2G 1R(lsb)
Definition: pixfmt.h:87
#define AV_RN32A(p)
Definition: intreadwrite.h:526
uint8_t
8 bit with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:74
#define XWD_STATIC_GRAY
Definition: xwd.h:34
AVCodec ff_xwd_encoder
Definition: xwdenc.c:211
packed RGB 5:6:5, 16bpp, (msb) 5R 6G 5B(lsb), big-endian
Definition: pixfmt.h:114
packed ABGR 8:8:8:8, 32bpp, ABGRABGR...
Definition: pixfmt.h:96
uint8_t * data
Definition: avcodec.h:1173
#define XWD_HEADER_SIZE
Definition: xwd.h:27
#define XWD_CMAP_SIZE
Definition: xwd.h:28
#define XWD_VERSION
Definition: xwd.h:26
#define av_log(a,...)
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1219
#define XWD_Z_PIXMAP
Definition: xwd.h:32
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define AVERROR(e)
Definition: error.h:43
#define WINDOW_NAME_SIZE
Definition: xwdenc.c:31
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:175
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
Definition: pixfmt.h:97
const char * name
Name of the codec implementation.
Definition: avcodec.h:3213
Libavcodec external API header.
packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
Definition: pixfmt.h:94
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:95
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1179
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:242
packed RGB 1:2:1, 8bpp, (msb)1R 2G 1B(lsb)
Definition: pixfmt.h:90
ret
Definition: avfilter.c:974
int width
picture width / height.
Definition: avcodec.h:1430
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:66
packed BGR 5:6:5, 16bpp, (msb) 5B 6G 5R(lsb), big-endian
Definition: pixfmt.h:119
packed RGB 3:3:2, 8bpp, (msb)2B 3G 3R(lsb)
Definition: pixfmt.h:85
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:199
uint8_t flags
Definition: pixdesc.h:90
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
main external API structure.
Definition: avcodec.h:1252
void * buf
Definition: avisynth_c.h:553
#define WINDOW_NAME
Definition: xwdenc.c:30
packed BGR 5:5:5, 16bpp, (msb)1X 5B 5G 5R(lsb), little-endian, X=unused/undefined ...
Definition: pixfmt.h:122
packed RGB 5:5:5, 16bpp, (msb)1X 5R 5G 5B(lsb), big-endian , X=unused/undefined
Definition: pixfmt.h:116
#define XWD_TRUE_COLOR
Definition: xwd.h:38
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:182
Y , 8bpp.
Definition: pixfmt.h:71
common internal api header.
#define XWD_PSEUDO_COLOR
Definition: xwd.h:37
Y , 1bpp, 0 is white, 1 is black, in each byte pixels are ordered from the msb to the lsb...
Definition: pixfmt.h:72
packed RGB 3:3:2, 8bpp, (msb)2R 3G 3B(lsb)
Definition: pixfmt.h:88
#define AV_PIX_FMT_FLAG_BE
Pixel format is big-endian.
Definition: pixdesc.h:111
static av_always_inline void bytestream_put_buffer(uint8_t **b, const uint8_t *src, unsigned int size)
Definition: bytestream.h:366
static int xwd_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *pict, int *got_packet)
Definition: xwdenc.c:33
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:237
packed BGR 5:5:5, 16bpp, (msb)1X 5B 5G 5R(lsb), big-endian , X=unused/undefined
Definition: pixfmt.h:121
AVPixelFormat
Pixel format.
Definition: pixfmt.h:61
This structure stores compressed data.
Definition: avcodec.h:1150