https://github.com/eVRydayVR/ffmpeg-unwarpvr
Tip revision: e80a99182f0008c230ba03c776fe9980e9f162b6 authored by eVRydayVR on 26 September 2014, 00:46:40 UTC
Add options for scaling, one eye only, swap eyes, and eye relief dial, which skips JSON search
Add options for scaling, one eye only, swap eyes, and eye relief dial, which skips JSON search
Tip revision: e80a991
y41pdec.c
/*
* y41p decoder
*
* 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_decode_init(AVCodecContext *avctx)
{
avctx->pix_fmt = AV_PIX_FMT_YUV411P;
avctx->bits_per_raw_sample = 12;
if (avctx->width & 7) {
av_log(avctx, AV_LOG_WARNING, "y41p requires width to be divisible by 8.\n");
}
return 0;
}
static int y41p_decode_frame(AVCodecContext *avctx, void *data,
int *got_frame, AVPacket *avpkt)
{
AVFrame *pic = data;
uint8_t *src = avpkt->data;
uint8_t *y, *u, *v;
int i, j, ret;
if (avpkt->size < 1.5 * avctx->height * avctx->width) {
av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
return AVERROR(EINVAL);
}
if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
return ret;
pic->key_frame = 1;
pic->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) {
*(u++) = *src++;
*(y++) = *src++;
*(v++) = *src++;
*(y++) = *src++;
*(u++) = *src++;
*(y++) = *src++;
*(v++) = *src++;
*(y++) = *src++;
*(y++) = *src++;
*(y++) = *src++;
*(y++) = *src++;
*(y++) = *src++;
}
}
*got_frame = 1;
return avpkt->size;
}
AVCodec ff_y41p_decoder = {
.name = "y41p",
.long_name = NULL_IF_CONFIG_SMALL("Uncompressed YUV 4:1:1 12-bit"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_Y41P,
.init = y41p_decode_init,
.decode = y41p_decode_frame,
.capabilities = CODEC_CAP_DR1,
};