Libav
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 Libav.
7  *
8  * Libav 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  * Libav 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 Libav; 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 {
29 #if FF_API_CODED_FRAME
33 #endif
34 
35  return 0;
36 }
37 
38 static int xbm_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
39  const AVFrame *p, int *got_packet)
40 {
41  int i, j, ret, size, linesize;
42  uint8_t *ptr, *buf;
43 
44  linesize = (avctx->width + 7) / 8;
45  size = avctx->height * (linesize * 7 + 2) + 110;
46  if ((ret = ff_alloc_packet(pkt, size)) < 0) {
47  av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
48  return ret;
49  }
50 
51  buf = pkt->data;
52  ptr = p->data[0];
53 
54  buf += snprintf(buf, 32, "#define image_width %u\n", avctx->width);
55  buf += snprintf(buf, 33, "#define image_height %u\n", avctx->height);
56  buf += snprintf(buf, 40, "static unsigned char image_bits[] = {\n");
57  for (i = 0; i < avctx->height; i++) {
58  for (j = 0; j < linesize; j++)
59  buf += snprintf(buf, 7, " 0x%02X,", ff_reverse[*ptr++]);
60  ptr += p->linesize[0] - linesize;
61  buf += snprintf(buf, 2, "\n");
62  }
63  buf += snprintf(buf, 5, " };\n");
64 
65  pkt->size = buf - pkt->data;
66  pkt->flags |= AV_PKT_FLAG_KEY;
67  *got_packet = 1;
68  return 0;
69 }
70 
72  .name = "xbm",
73  .long_name = NULL_IF_CONFIG_SMALL("XBM (X BitMap) image"),
74  .type = AVMEDIA_TYPE_VIDEO,
75  .id = AV_CODEC_ID_XBM,
76  .init = xbm_encode_init,
77  .encode2 = xbm_encode_frame,
78  .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_MONOWHITE,
80 };
int size
This structure describes decoded (raw) audio or video data.
Definition: frame.h:140
static int xbm_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *p, int *got_packet)
Definition: xbmenc.c:38
int size
Definition: avcodec.h:1347
av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (%s)\, len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt), use_generic ? ac->func_descr_generic :ac->func_descr)
AVCodec.
Definition: avcodec.h:3120
uint8_t
#define av_cold
Definition: attributes.h:66
uint8_t * data
Definition: avcodec.h:1346
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1378
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:124
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:148
const char * name
Name of the codec implementation.
Definition: avcodec.h:3127
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1352
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:201
int width
picture width / height.
Definition: avcodec.h:1580
int ff_alloc_packet(AVPacket *avpkt, int size)
Check AVPacket size and/or allocate data.
Definition: utils.c:1211
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:158
main external API structure.
Definition: avcodec.h:1409
AVCodec ff_xbm_encoder
Definition: xbmenc.c:71
static av_cold int xbm_encode_init(AVCodecContext *avctx)
Definition: xbmenc.c:27
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:146
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:77
common internal api header.
Y , 1bpp, 0 is white, 1 is black, in each byte pixels are ordered from the msb to the lsb...
Definition: pixfmt.h:68
attribute_deprecated AVFrame * coded_frame
the picture in the bitstream
Definition: avcodec.h:2797
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:78
const uint8_t ff_reverse[256]
Definition: mathtables.c:72
AVPixelFormat
Pixel format.
Definition: pixfmt.h:57
This structure stores compressed data.
Definition: avcodec.h:1323