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/*
* y41p encoder
*
* Copyright (c) 2012 Paul B Mahol
*
* 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 "internal.h"
static av_cold int y41p_encode_init(AVCodecContext *avctx)
{
if (avctx->width & 7) {
av_log(avctx, AV_LOG_ERROR, "y41p requires width to be divisible by 8.\n");
return AVERROR_INVALIDDATA;
}
avctx->coded_frame = avcodec_alloc_frame();
avctx->bits_per_coded_sample = 12;
if (!avctx->coded_frame) {
av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
return AVERROR(ENOMEM);
}
return 0;
}
static int y41p_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
const AVFrame *pic, int *got_packet)
{
uint8_t *dst;
uint8_t *y, *u, *v;
int i, j, ret;
if ((ret = ff_alloc_packet(pkt, avctx->width * avctx->height * 1.5)) < 0) {
av_log(avctx, AV_LOG_ERROR, "Out buffer is too small.\n");
return ret;
}
avctx->coded_frame->reference = 0;
avctx->coded_frame->key_frame = 1;
avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
dst = pkt->data;
for (i = avctx->height - 1; i >= 0; i--) {
y = &pic->data[0][i * pic->linesize[0]];
u = &pic->data[1][i * pic->linesize[1]];
v = &pic->data[2][i * pic->linesize[2]];
for (j = 0; j < avctx->width; j += 8) {
*(dst++) = *(u++);
*(dst++) = *(y++);
*(dst++) = *(v++);
*(dst++) = *(y++);
*(dst++) = *(u++);
*(dst++) = *(y++);
*(dst++) = *(v++);
*(dst++) = *(y++);
*(dst++) = *(y++);
*(dst++) = *(y++);
*(dst++) = *(y++);
*(dst++) = *(y++);
}
}
pkt->flags |= AV_PKT_FLAG_KEY;
*got_packet = 1;
return 0;
}
static av_cold int y41p_encode_close(AVCodecContext *avctx)
{
av_freep(&avctx->coded_frame);
return 0;
}
AVCodec ff_y41p_encoder = {
.name = "y41p",
.type = AVMEDIA_TYPE_VIDEO,
.id = CODEC_ID_Y41P,
.init = y41p_encode_init,
.encode2 = y41p_encode_frame,
.close = y41p_encode_close,
.pix_fmts = (const enum PixelFormat[]) { PIX_FMT_YUV411P,
PIX_FMT_NONE },
.long_name = NULL_IF_CONFIG_SMALL("Uncompressed YUV 4:1:1 12-bit"),
};
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