001567c767
This allows mplayer -vc bt411 to decode files encoded with FFmpeg. Reviewed-by: Paul B Mahol
103 lines
3.0 KiB
C
103 lines
3.0 KiB
C
/*
|
|
* 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"
|
|
|
|
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, uint8_t *buf,
|
|
int buf_size, void *data)
|
|
{
|
|
AVFrame *pic = data;
|
|
uint8_t *dst = buf;
|
|
uint8_t *y, *u, *v;
|
|
int i, j;
|
|
|
|
if (buf_size < avctx->width * avctx->height * 1.5) {
|
|
av_log(avctx, AV_LOG_ERROR, "Out buffer is too small.\n");
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
avctx->coded_frame->reference = 0;
|
|
avctx->coded_frame->key_frame = 1;
|
|
avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
|
|
|
|
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++);
|
|
}
|
|
}
|
|
|
|
return avctx->width * avctx->height * 1.5;
|
|
}
|
|
|
|
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,
|
|
.encode = 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"),
|
|
};
|