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/*
* libquicktime yuv4 encoder
*
* Copyright (c) 2011 Carl Eugen Hoyos
*
* 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"
static int yuv4_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
const AVFrame *pic, int *got_packet)
{
uint8_t *dst;
const uint8_t *y, *u, *v;
int ret;
ret = ff_get_encode_buffer(avctx, pkt, 6 * ((avctx->width + 1) / 2)
* ((avctx->height + 1) / 2), 0);
if (ret < 0)
return ret;
dst = pkt->data;
y = pic->data[0];
u = pic->data[1];
v = pic->data[2];
for (int i = 0; i < avctx->height / 2; i++) {
for (int j = 0; j < (avctx->width + 1) / 2; j++) {
*dst++ = u[j] ^ 0x80;
*dst++ = v[j] ^ 0x80;
*dst++ = y[ 2 * j ];
*dst++ = y[ 2 * j + 1];
*dst++ = y[pic->linesize[0] + 2 * j ];
*dst++ = y[pic->linesize[0] + 2 * j + 1];
}
y += 2 * pic->linesize[0];
u += pic->linesize[1];
v += pic->linesize[2];
}
if (avctx->height & 1) {
for (int j = 0; j < (avctx->width + 1) / 2; j++) {
*dst++ = u[j] ^ 0x80;
*dst++ = v[j] ^ 0x80;
*dst++ = y[2 * j ];
*dst++ = y[2 * j + 1];
*dst++ = y[2 * j ];
*dst++ = y[2 * j + 1];
}
}
*got_packet = 1;
return 0;
}
const FFCodec ff_yuv4_encoder = {
.p.name = "yuv4",
CODEC_LONG_NAME("Uncompressed packed 4:2:0"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_YUV4,
.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
.p.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
FF_CODEC_ENCODE_CB(yuv4_encode_frame),
};
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