FFmpeg
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xbmenc.c
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1 /*
2  * XBM 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 "avcodec.h"
24 #include "internal.h"
25 #include "mathops.h"
26 
28 {
30  if (!avctx->coded_frame)
31  return AVERROR(ENOMEM);
33 
34  return 0;
35 }
36 
38  const AVFrame *p, int *got_packet)
39 {
40  int i, j, ret, size, linesize;
41  uint8_t *ptr, *buf;
42 
43  linesize = (avctx->width + 7) / 8;
44  size = avctx->height * (linesize * 7 + 2) + 110;
45  if ((ret = ff_alloc_packet2(avctx, pkt, size)) < 0)
46  return ret;
47 
48  buf = pkt->data;
49  ptr = p->data[0];
50 
51  buf += snprintf(buf, 32, "#define image_width %u\n", avctx->width);
52  buf += snprintf(buf, 33, "#define image_height %u\n", avctx->height);
53  buf += snprintf(buf, 40, "static unsigned char image_bits[] = {\n");
54  for (i = 0; i < avctx->height; i++) {
55  for (j = 0; j < linesize; j++)
56  buf += snprintf(buf, 7, " 0x%02X,", ff_reverse[*ptr++]);
57  ptr += p->linesize[0] - linesize;
58  buf += snprintf(buf, 2, "\n");
59  }
60  buf += snprintf(buf, 5, " };\n");
61 
62  pkt->size = buf - pkt->data;
63  pkt->flags |= AV_PKT_FLAG_KEY;
64  *got_packet = 1;
65  return 0;
66 }
67 
69 {
70  av_freep(&avctx->coded_frame);
71 
72  return 0;
73 }
74 
76  .name = "xbm",
77  .type = AVMEDIA_TYPE_VIDEO,
78  .id = AV_CODEC_ID_XBM,
79  .init = xbm_encode_init,
80  .encode2 = xbm_encode_frame,
81  .close = xbm_encode_close,
82  .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_MONOWHITE,
84  .long_name = NULL_IF_CONFIG_SMALL("XBM (X BitMap) image"),
85 };