aac5773f
 hucm
功能基本完成，接口待打磨
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/*
* AVID Meridien encoder
*
* 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"
#include "libavutil/intreadwrite.h"
static av_cold int avui_encode_init(AVCodecContext *avctx)
{
if (avctx->width != 720 || avctx->height != 486 && avctx->height != 576) {
av_log(avctx, AV_LOG_ERROR, "Only 720x486 and 720x576 are supported.\n");
return AVERROR(EINVAL);
}
if (!(avctx->extradata = av_mallocz(144 + AV_INPUT_BUFFER_PADDING_SIZE)))
return AVERROR(ENOMEM);
avctx->extradata_size = 144;
memcpy(avctx->extradata, "\0\0\0\x18""APRGAPRG0001", 16);
if (avctx->field_order > AV_FIELD_PROGRESSIVE) {
avctx->extradata[19] = 2;
} else {
avctx->extradata[19] = 1;
}
memcpy(avctx->extradata + 24, "\0\0\0\x78""ARESARES0001""\0\0\0\x98", 20);
AV_WB32(avctx->extradata + 44, avctx->width);
AV_WB32(avctx->extradata + 48, avctx->height);
memcpy(avctx->extradata + 52, "\0\0\0\x1\0\0\0\x20\0\0\0\x2", 12);
return 0;
}
static int avui_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
const AVFrame *pic, int *got_packet)
{
uint8_t *dst;
int i, j, skip, ret, size, interlaced;
interlaced = avctx->field_order > AV_FIELD_PROGRESSIVE;
if (avctx->height == 486) {
skip = 10;
} else {
skip = 16;
}
size = 2 * avctx->width * (avctx->height + skip) + 8 * interlaced;
if ((ret = ff_alloc_packet2(avctx, pkt, size, size)) < 0)
return ret;
dst = pkt->data;
if (!interlaced) {
memset(dst, 0, avctx->width * skip);
dst += avctx->width * skip;
}
for (i = 0; i <= interlaced; i++) {
uint8_t *src;
if (interlaced && avctx->height == 486) {
src = pic->data[0] + (1 - i) * pic->linesize[0];
} else {
src = pic->data[0] + i * pic->linesize[0];
}
memset(dst, 0, avctx->width * skip + 4 * i);
dst += avctx->width * skip + 4 * i;
for (j = 0; j < avctx->height; j += interlaced + 1) {
memcpy(dst, src, avctx->width * 2);
src += (interlaced + 1) * pic->linesize[0];
dst += avctx->width * 2;
}
}
pkt->flags |= AV_PKT_FLAG_KEY;
*got_packet = 1;
return 0;
}
AVCodec ff_avui_encoder = {
.name = "avui",
.long_name = NULL_IF_CONFIG_SMALL("Avid Meridien Uncompressed"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_AVUI,
.init = avui_encode_init,
.encode2 = avui_encode_frame,
.capabilities = AV_CODEC_CAP_EXPERIMENTAL | AV_CODEC_CAP_INTRA_ONLY,
.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_UYVY422, AV_PIX_FMT_NONE },
};
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