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/*
* 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 AVERROR(EINVAL);
}
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();
if (!avctx->coded_frame)
return AVERROR(ENOMEM);
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 line_padding = stride - ((avctx->width * 8 + 11) / 12) * 4;
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];
PutByteContext p;
if (buf_size < avctx->height * stride) {
av_log(avctx, AV_LOG_ERROR, "output buffer too small\n");
return AVERROR(ENOMEM);
}
bytestream2_init_writer(&p, buf, buf_size);
#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); \
bytestream2_put_le32u(&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)
bytestream2_put_le32u(&p, val);
if (w < avctx->width - 3) {
val |= (CLIP(*u++) << 10) | (CLIP(*y++) << 20);
bytestream2_put_le32u(&p, val);
val = CLIP(*v++) | (CLIP(*y++) << 10);
bytestream2_put_le32u(&p, val);
}
}
bytestream2_set_buffer(&p, 0, line_padding);
y += pic->linesize[0] / 2 - avctx->width;
u += pic->linesize[1] / 2 - avctx->width / 2;
v += pic->linesize[2] / 2 - avctx->width / 2;
}
return bytestream2_tell_p(&p);
}
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"),
};
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