aac5773f
 hucm
功能基本完成，接口待打磨
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/*
* Raw Video Encoder
* Copyright (c) 2001 Fabrice Bellard
*
* 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
*/
/**
* @file
* Raw Video Encoder
*/
#include "avcodec.h"
#include "raw.h"
#include "internal.h"
#include "libavutil/pixdesc.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
static av_cold int raw_encode_init(AVCodecContext *avctx)
{
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
#if FF_API_CODED_FRAME
FF_DISABLE_DEPRECATION_WARNINGS
avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
avctx->bits_per_coded_sample = av_get_bits_per_pixel(desc);
if(!avctx->codec_tag)
avctx->codec_tag = avcodec_pix_fmt_to_codec_tag(avctx->pix_fmt);
avctx->bit_rate = ff_guess_coded_bitrate(avctx);
return 0;
}
static int raw_encode(AVCodecContext *avctx, AVPacket *pkt,
const AVFrame *frame, int *got_packet)
{
int ret = av_image_get_buffer_size(frame->format,
frame->width, frame->height, 1);
if (ret < 0)
return ret;
if ((ret = ff_alloc_packet2(avctx, pkt, ret, ret)) < 0)
return ret;
if ((ret = av_image_copy_to_buffer(pkt->data, pkt->size,
(const uint8_t **)frame->data, frame->linesize,
frame->format,
frame->width, frame->height, 1)) < 0)
return ret;
if(avctx->codec_tag == AV_RL32("yuv2") && ret > 0 &&
frame->format == AV_PIX_FMT_YUYV422) {
int x;
for(x = 1; x < frame->height*frame->width*2; x += 2)
pkt->data[x] ^= 0x80;
} else if (avctx->codec_tag == AV_RL32("b64a") && ret > 0 &&
frame->format == AV_PIX_FMT_RGBA64BE) {
uint64_t v;
int x;
for (x = 0; x < frame->height * frame->width; x++) {
v = AV_RB64(&pkt->data[8 * x]);
AV_WB64(&pkt->data[8 * x], v << 48 | v >> 16);
}
}
pkt->flags |= AV_PKT_FLAG_KEY;
*got_packet = 1;
return 0;
}
AVCodec ff_rawvideo_encoder = {
.name = "rawvideo",
.long_name = NULL_IF_CONFIG_SMALL("raw video"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_RAWVIDEO,
.init = raw_encode_init,
.encode2 = raw_encode,
};
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