aac5773f
 hucm
功能基本完成，接口待打磨
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/*
* v408 decoder
* Copyright (c) 2012 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 v408_decode_init(AVCodecContext *avctx)
{
avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
return 0;
}
static int v408_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, *a;
int i, j, ret;
if (avpkt->size < 4 * 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];
a = pic->data[3];
for (i = 0; i < avctx->height; i++) {
for (j = 0; j < avctx->width; j++) {
if (avctx->codec_id==AV_CODEC_ID_AYUV) {
v[j] = *src++;
u[j] = *src++;
y[j] = *src++;
a[j] = *src++;
} else {
u[j] = *src++;
y[j] = *src++;
v[j] = *src++;
a[j] = *src++;
}
}
y += pic->linesize[0];
u += pic->linesize[1];
v += pic->linesize[2];
a += pic->linesize[3];
}
*got_frame = 1;
return avpkt->size;
}
#if CONFIG_AYUV_DECODER
AVCodec ff_ayuv_decoder = {
.name = "ayuv",
.long_name = NULL_IF_CONFIG_SMALL("Uncompressed packed MS 4:4:4:4"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_AYUV,
.init = v408_decode_init,
.decode = v408_decode_frame,
.capabilities = AV_CODEC_CAP_DR1,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
};
#endif
#if CONFIG_V408_DECODER
AVCodec ff_v408_decoder = {
.name = "v408",
.long_name = NULL_IF_CONFIG_SMALL("Uncompressed packed QT 4:4:4:4"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_V408,
.init = v408_decode_init,
.decode = v408_decode_frame,
.capabilities = AV_CODEC_CAP_DR1,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
};
#endif
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