mirror of
https://github.com/nyanmisaka/ffmpeg-rockchip.git
synced 2025-11-01 04:53:04 +08:00
85 lines
2.3 KiB
C
85 lines
2.3 KiB
C
/*
|
|
* v308 decoder
|
|
* 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 "internal.h"
|
|
|
|
static av_cold int v308_decode_init(AVCodecContext *avctx)
|
|
{
|
|
avctx->pix_fmt = AV_PIX_FMT_YUV444P;
|
|
|
|
if (avctx->width & 1)
|
|
av_log(avctx, AV_LOG_WARNING, "v308 requires width to be even.\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int v308_decode_frame(AVCodecContext *avctx, void *data,
|
|
int *got_frame, AVPacket *avpkt)
|
|
{
|
|
AVFrame *pic = data;
|
|
const uint8_t *src = avpkt->data;
|
|
uint8_t *y, *u, *v;
|
|
int i, j, ret;
|
|
|
|
if (avpkt->size < 3 * 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;
|
|
|
|
y = pic->data[0];
|
|
u = pic->data[1];
|
|
v = pic->data[2];
|
|
|
|
for (i = 0; i < avctx->height; i++) {
|
|
for (j = 0; j < avctx->width; j++) {
|
|
v[j] = *src++;
|
|
y[j] = *src++;
|
|
u[j] = *src++;
|
|
}
|
|
|
|
y += pic->linesize[0];
|
|
u += pic->linesize[1];
|
|
v += pic->linesize[2];
|
|
}
|
|
|
|
*got_frame = 1;
|
|
|
|
return avpkt->size;
|
|
}
|
|
|
|
const AVCodec ff_v308_decoder = {
|
|
.name = "v308",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Uncompressed packed 4:4:4"),
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_V308,
|
|
.init = v308_decode_init,
|
|
.decode = v308_decode_frame,
|
|
.capabilities = AV_CODEC_CAP_DR1,
|
|
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
|
|
};
|