mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-21 10:55:51 +02:00
130 lines
3.9 KiB
C
130 lines
3.9 KiB
C
/*
|
|
* V210 encoder
|
|
*
|
|
* Copyright (C) 2009 Michael Niedermayer <michaelni@gmx.at>
|
|
* Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
|
|
*
|
|
* 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"
|
|
|
|
static av_cold int encode_init(AVCodecContext *avctx)
|
|
{
|
|
if (avctx->width & 1) {
|
|
av_log(avctx, AV_LOG_ERROR, "v210 needs even width\n");
|
|
return -1;
|
|
}
|
|
|
|
if (avctx->pix_fmt != PIX_FMT_YUV422P10) {
|
|
av_log(avctx, AV_LOG_ERROR, "v210 needs YUV422P10\n");
|
|
return -1;
|
|
}
|
|
|
|
if (avctx->bits_per_raw_sample != 10)
|
|
av_log(avctx, AV_LOG_WARNING, "bits per raw sample: %d != 10-bit\n",
|
|
avctx->bits_per_raw_sample);
|
|
|
|
avctx->coded_frame = avcodec_alloc_frame();
|
|
|
|
avctx->coded_frame->key_frame = 1;
|
|
avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int encode_frame(AVCodecContext *avctx, unsigned char *buf,
|
|
int buf_size, void *data)
|
|
{
|
|
const AVFrame *pic = data;
|
|
int aligned_width = ((avctx->width + 47) / 48) * 48;
|
|
int stride = aligned_width * 8 / 3;
|
|
int h, w;
|
|
const uint16_t *y = (const uint16_t*)pic->data[0];
|
|
const uint16_t *u = (const uint16_t*)pic->data[1];
|
|
const uint16_t *v = (const uint16_t*)pic->data[2];
|
|
uint8_t *p = buf;
|
|
uint8_t *pdst = buf;
|
|
|
|
if (buf_size < aligned_width * avctx->height * 8 / 3) {
|
|
av_log(avctx, AV_LOG_ERROR, "output buffer too small\n");
|
|
return -1;
|
|
}
|
|
|
|
#define CLIP(v) av_clip(v, 4, 1019)
|
|
|
|
#define WRITE_PIXELS(a, b, c) \
|
|
do { \
|
|
val = CLIP(*a++); \
|
|
val |= (CLIP(*b++) << 10) | \
|
|
(CLIP(*c++) << 20); \
|
|
bytestream_put_le32(&p, val); \
|
|
} while (0)
|
|
|
|
for (h = 0; h < avctx->height; h++) {
|
|
uint32_t val;
|
|
for (w = 0; w < avctx->width - 5; w += 6) {
|
|
WRITE_PIXELS(u, y, v);
|
|
WRITE_PIXELS(y, u, y);
|
|
WRITE_PIXELS(v, y, u);
|
|
WRITE_PIXELS(y, v, y);
|
|
}
|
|
if (w < avctx->width - 1) {
|
|
WRITE_PIXELS(u, y, v);
|
|
|
|
val = CLIP(*y++);
|
|
if (w == avctx->width - 2)
|
|
bytestream_put_le32(&p, val);
|
|
if (w < avctx->width - 3) {
|
|
val |= (CLIP(*u++) << 10) | (CLIP(*y++) << 20);
|
|
bytestream_put_le32(&p, val);
|
|
|
|
val = CLIP(*v++) | (CLIP(*y++) << 10);
|
|
bytestream_put_le32(&p, val);
|
|
}
|
|
}
|
|
|
|
pdst += stride;
|
|
memset(p, 0, pdst - p);
|
|
p = pdst;
|
|
y += pic->linesize[0] / 2 - avctx->width;
|
|
u += pic->linesize[1] / 2 - avctx->width / 2;
|
|
v += pic->linesize[2] / 2 - avctx->width / 2;
|
|
}
|
|
|
|
return p - buf;
|
|
}
|
|
|
|
static av_cold int encode_close(AVCodecContext *avctx)
|
|
{
|
|
av_freep(&avctx->coded_frame);
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVCodec ff_v210_encoder = {
|
|
.name = "v210",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = CODEC_ID_V210,
|
|
.init = encode_init,
|
|
.encode = encode_frame,
|
|
.close = encode_close,
|
|
.pix_fmts = (const enum PixelFormat[]){PIX_FMT_YUV422P10, PIX_FMT_NONE},
|
|
.long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
|
|
};
|