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
27static int xbm_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
28                            const AVFrame *p, int *got_packet)
29{
30    int i, j, ret, size, linesize;
31    uint8_t *ptr, *buf;
32
33    linesize = (avctx->width + 7) / 8;
34    size     = avctx->height * (linesize * 7 + 2) + 110;
35    if ((ret = ff_alloc_packet2(avctx, pkt, size)) < 0)
36        return ret;
37
38    buf = pkt->data;
39    ptr = p->data[0];
40
41    buf += snprintf(buf, 32, "#define image_width %u\n", avctx->width);
42    buf += snprintf(buf, 33, "#define image_height %u\n", avctx->height);
43    buf += snprintf(buf, 40, "static unsigned char image_bits[] = {\n");
44    for (i = 0; i < avctx->height; i++) {
45        for (j = 0; j < linesize; j++)
46            buf += snprintf(buf, 7, " 0x%02X,", ff_reverse[*ptr++]);
47        ptr += p->linesize[0] - linesize;
48        buf += snprintf(buf, 2, "\n");
49    }
50    buf += snprintf(buf, 5, " };\n");
51
52    pkt->size   = buf - pkt->data;
53    pkt->flags |= AV_PKT_FLAG_KEY;
54    *got_packet = 1;
55    return 0;
56}
57
58AVCodec ff_xbm_encoder = {
59    .name         = "xbm",
60    .long_name    = NULL_IF_CONFIG_SMALL("XBM (X BitMap) image"),
61    .type         = AVMEDIA_TYPE_VIDEO,
62    .id           = AV_CODEC_ID_XBM,
63    .encode2      = xbm_encode_frame,
64    .pix_fmts     = (const enum AVPixelFormat[]) { AV_PIX_FMT_MONOWHITE,
65                                                   AV_PIX_FMT_NONE },
66};
67