0,0 → 1,112 |
/* |
* 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 = avcodec_alloc_frame(); |
|
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, *src = pic->data[0]; |
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++) { |
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 }, |
}; |