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/*
* WBMP (Wireless Application Protocol Bitmap) image
*
* 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 "avcodec.h"
#include "bytestream.h"
#include "codec_internal.h"
#include "encode.h"
static void putv(uint8_t ** bufp, unsigned int v)
{
unsigned int vv = 0;
int n = 0;
while (vv != v)
vv += v & (0x7F << 7 * n++);
while (--n > 0)
bytestream_put_byte(bufp, 0x80 | (v & (0x7F << 7 * n)) >> 7 * n);
bytestream_put_byte(bufp, v & 0x7F);
}
static void writebits(uint8_t ** bufp, const uint8_t * src, int width, int height, int linesize)
{
int wpad = (width + 7) / 8;
for (int j = 0; j < height; j++) {
memcpy(*bufp, src, wpad);
*bufp += wpad;
src += linesize;
}
}
static int wbmp_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
const AVFrame *frame, int *got_packet)
{
int64_t size = avctx->height * ((avctx->width + 7) / 8) + 32;
uint8_t *buf;
int ret;
if ((ret = ff_get_encode_buffer(avctx, pkt, size, 0)) < 0)
return ret;
buf = pkt->data;
putv(&buf, 0);
bytestream_put_byte(&buf, 0);
putv(&buf, avctx->width);
putv(&buf, avctx->height);
if (frame->linesize[0] == (avctx->width + 7) / 8)
bytestream_put_buffer(&buf, frame->data[0], avctx->height * ((avctx->width + 7) / 8));
else
writebits(&buf, frame->data[0], avctx->width, avctx->height, frame->linesize[0]);
av_shrink_packet(pkt, buf - pkt->data);
*got_packet = 1;
return 0;
}
const FFCodec ff_wbmp_encoder = {
.p.name = "wbmp",
.p.long_name = NULL_IF_CONFIG_SMALL("WBMP (Wireless Application Protocol Bitmap) image"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_WBMP,
.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
FF_CODEC_ENCODE_CB(wbmp_encode_frame),
.p.pix_fmts = (const enum AVPixelFormat[]){
AV_PIX_FMT_MONOBLACK,
AV_PIX_FMT_NONE
},
};
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