114 lines
3.4 KiB
C
114 lines
3.4 KiB
C
/*
|
|
* 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"
|
|
|
|
static av_cold int avui_encode_init(AVCodecContext *avctx)
|
|
{
|
|
avctx->coded_frame = av_frame_alloc();
|
|
|
|
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->coded_frame) {
|
|
av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
if (!(avctx->extradata = av_mallocz(24 + FF_INPUT_BUFFER_PADDING_SIZE)))
|
|
return AVERROR(ENOMEM);
|
|
avctx->extradata_size = 24;
|
|
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;
|
|
}
|
|
|
|
|
|
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)) < 0)
|
|
return ret;
|
|
dst = pkt->data;
|
|
if (!interlaced) {
|
|
dst += avctx->width * skip;
|
|
}
|
|
|
|
avctx->coded_frame->key_frame = 1;
|
|
avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
|
|
|
|
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];
|
|
}
|
|
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;
|
|
}
|
|
|
|
static av_cold int avui_encode_close(AVCodecContext *avctx)
|
|
{
|
|
av_freep(&avctx->coded_frame);
|
|
|
|
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,
|
|
.close = avui_encode_close,
|
|
.capabilities = CODEC_CAP_EXPERIMENTAL,
|
|
.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_UYVY422, AV_PIX_FMT_NONE },
|
|
};
|