mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-21 10:55:51 +02:00
101 lines
2.8 KiB
C
101 lines
2.8 KiB
C
/*
|
|
* v410 decoder
|
|
*
|
|
* Copyright (c) 2011 Derek Buitenhuis
|
|
*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav 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.
|
|
*
|
|
* Libav 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 Libav; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "libavutil/common.h"
|
|
#include "libavutil/intreadwrite.h"
|
|
#include "avcodec.h"
|
|
#include "internal.h"
|
|
|
|
static av_cold int v410_decode_init(AVCodecContext *avctx)
|
|
{
|
|
avctx->pix_fmt = AV_PIX_FMT_YUV444P10;
|
|
avctx->bits_per_raw_sample = 10;
|
|
|
|
if (avctx->width & 1) {
|
|
if (avctx->err_recognition & AV_EF_EXPLODE) {
|
|
av_log(avctx, AV_LOG_ERROR, "v410 requires width to be even.\n");
|
|
return AVERROR_INVALIDDATA;
|
|
} else {
|
|
av_log(avctx, AV_LOG_WARNING, "v410 requires width to be even, continuing anyway.\n");
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int v410_decode_frame(AVCodecContext *avctx, void *data,
|
|
int *got_frame, AVPacket *avpkt)
|
|
{
|
|
AVFrame *pic = data;
|
|
uint8_t *src = avpkt->data;
|
|
uint16_t *y, *u, *v;
|
|
uint32_t val;
|
|
int i, j;
|
|
|
|
if (avpkt->size < 4 * avctx->height * avctx->width) {
|
|
av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
if (ff_get_buffer(avctx, pic, 0) < 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "Could not allocate buffer.\n");
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
pic->key_frame = 1;
|
|
pic->pict_type = AV_PICTURE_TYPE_I;
|
|
|
|
y = (uint16_t *)pic->data[0];
|
|
u = (uint16_t *)pic->data[1];
|
|
v = (uint16_t *)pic->data[2];
|
|
|
|
for (i = 0; i < avctx->height; i++) {
|
|
for (j = 0; j < avctx->width; j++) {
|
|
val = AV_RL32(src);
|
|
|
|
u[j] = (val >> 2) & 0x3FF;
|
|
y[j] = (val >> 12) & 0x3FF;
|
|
v[j] = (val >> 22);
|
|
|
|
src += 4;
|
|
}
|
|
|
|
y += pic->linesize[0] >> 1;
|
|
u += pic->linesize[1] >> 1;
|
|
v += pic->linesize[2] >> 1;
|
|
}
|
|
|
|
*got_frame = 1;
|
|
|
|
return avpkt->size;
|
|
}
|
|
|
|
AVCodec ff_v410_decoder = {
|
|
.name = "v410",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:4:4 10-bit"),
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_V410,
|
|
.init = v410_decode_init,
|
|
.decode = v410_decode_frame,
|
|
.capabilities = CODEC_CAP_DR1,
|
|
};
|