mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-30 03:12:08 +00:00
91 lines
2.7 KiB
C
91 lines
2.7 KiB
C
/*
|
|
* 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",
|
|
CODEC_LONG_NAME("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 |
|
|
AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
|
|
FF_CODEC_ENCODE_CB(wbmp_encode_frame),
|
|
.p.pix_fmts = (const enum AVPixelFormat[]){
|
|
AV_PIX_FMT_MONOBLACK,
|
|
AV_PIX_FMT_NONE
|
|
},
|
|
};
|