120 lines
3.6 KiB
C
120 lines
3.6 KiB
C
/*
|
|
* bitpacked encoder
|
|
*
|
|
* Copyright (c) 2021 Limin Wang
|
|
*
|
|
* 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 "codec_internal.h"
|
|
#include "encode.h"
|
|
#include "internal.h"
|
|
#include "put_bits.h"
|
|
#include "libavutil/pixdesc.h"
|
|
|
|
struct BitpackedContext {
|
|
int (*encode)(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame);
|
|
};
|
|
|
|
static int encode_yuv422p10(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame)
|
|
{
|
|
const int buf_size = avctx->height * avctx->width * avctx->bits_per_coded_sample / 8;
|
|
int ret;
|
|
uint8_t *dst;
|
|
const uint16_t *y;
|
|
const uint16_t *u;
|
|
const uint16_t *v;
|
|
PutBitContext pb;
|
|
|
|
ret = ff_get_encode_buffer(avctx, pkt, buf_size, 0);
|
|
if (ret < 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
|
|
return ret;
|
|
}
|
|
dst = pkt->data;
|
|
|
|
init_put_bits(&pb, dst, buf_size);
|
|
|
|
for (int i = 0; i < avctx->height; i++) {
|
|
y = (uint16_t*)(frame->data[0] + i * frame->linesize[0]);
|
|
u = (uint16_t*)(frame->data[1] + i * frame->linesize[1]);
|
|
v = (uint16_t*)(frame->data[2] + i * frame->linesize[2]);
|
|
|
|
for (int j = 0; j < avctx->width; j += 2) {
|
|
/* u, y0, v, y1 */
|
|
put_bits(&pb, 10, av_clip_uintp2(*u++, 10));
|
|
put_bits(&pb, 10, av_clip_uintp2(*y++, 10));
|
|
put_bits(&pb, 10, av_clip_uintp2(*v++, 10));
|
|
put_bits(&pb, 10, av_clip_uintp2(*y++, 10));
|
|
}
|
|
}
|
|
flush_put_bits(&pb);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static av_cold int encode_init(AVCodecContext *avctx)
|
|
{
|
|
struct BitpackedContext *s = avctx->priv_data;
|
|
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
|
|
|
|
if (avctx->width & 1) {
|
|
av_log(avctx, AV_LOG_ERROR, "bitpacked needs even width\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
avctx->bits_per_coded_sample = av_get_bits_per_pixel(desc);
|
|
avctx->bit_rate = ff_guess_coded_bitrate(avctx);
|
|
|
|
if (avctx->pix_fmt == AV_PIX_FMT_YUV422P10)
|
|
s->encode = encode_yuv422p10;
|
|
else
|
|
return AVERROR(EINVAL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
|
|
const AVFrame *frame, int *got_packet)
|
|
{
|
|
struct BitpackedContext *s = avctx->priv_data;
|
|
int ret;
|
|
|
|
ret = s->encode(avctx, pkt, frame);
|
|
if (ret)
|
|
return ret;
|
|
|
|
*got_packet = 1;
|
|
return 0;
|
|
}
|
|
|
|
const FFCodec ff_bitpacked_encoder = {
|
|
.p.name = "bitpacked",
|
|
CODEC_LONG_NAME("Bitpacked"),
|
|
.p.type = AVMEDIA_TYPE_VIDEO,
|
|
.p.id = AV_CODEC_ID_BITPACKED,
|
|
.priv_data_size = sizeof(struct BitpackedContext),
|
|
.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS |
|
|
AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
|
|
.init = encode_init,
|
|
FF_CODEC_ENCODE_CB(encode_frame),
|
|
.p.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV422P10,
|
|
AV_PIX_FMT_NONE },
|
|
};
|