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105 lines
3.5 KiB
C
105 lines
3.5 KiB
C
/*
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* AVID Meridien encoder
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*
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* Copyright (c) 2012 Carl Eugen Hoyos
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "avcodec.h"
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#include "codec_internal.h"
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#include "encode.h"
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#include "libavutil/intreadwrite.h"
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static av_cold int avui_encode_init(AVCodecContext *avctx)
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{
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if (avctx->width != 720 || avctx->height != 486 && avctx->height != 576) {
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av_log(avctx, AV_LOG_ERROR, "Only 720x486 and 720x576 are supported.\n");
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return AVERROR(EINVAL);
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}
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if (!(avctx->extradata = av_mallocz(144 + AV_INPUT_BUFFER_PADDING_SIZE)))
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return AVERROR(ENOMEM);
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avctx->extradata_size = 144;
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memcpy(avctx->extradata, "\0\0\0\x18""APRGAPRG0001", 16);
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if (avctx->field_order > AV_FIELD_PROGRESSIVE) {
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avctx->extradata[19] = 2;
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} else {
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avctx->extradata[19] = 1;
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}
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memcpy(avctx->extradata + 24, "\0\0\0\x78""ARESARES0001""\0\0\0\x98", 20);
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AV_WB32(avctx->extradata + 44, avctx->width);
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AV_WB32(avctx->extradata + 48, avctx->height);
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memcpy(avctx->extradata + 52, "\0\0\0\x1\0\0\0\x20\0\0\0\x2", 12);
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return 0;
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}
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static int avui_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
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const AVFrame *pic, int *got_packet)
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{
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uint8_t *dst;
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int i, j, skip, ret, size, interlaced;
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interlaced = avctx->field_order > AV_FIELD_PROGRESSIVE;
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if (avctx->height == 486) {
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skip = 10;
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} else {
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skip = 16;
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}
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size = 2 * avctx->width * (avctx->height + skip) + 8 * interlaced;
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if ((ret = ff_get_encode_buffer(avctx, pkt, size, 0)) < 0)
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return ret;
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dst = pkt->data;
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if (!interlaced) {
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memset(dst, 0, avctx->width * skip);
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dst += avctx->width * skip;
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}
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for (i = 0; i <= interlaced; i++) {
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const uint8_t *src;
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if (interlaced && avctx->height == 486) {
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src = pic->data[0] + (1 - i) * pic->linesize[0];
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} else {
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src = pic->data[0] + i * pic->linesize[0];
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}
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memset(dst, 0, avctx->width * skip + 4 * i);
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dst += avctx->width * skip + 4 * i;
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for (j = 0; j < avctx->height; j += interlaced + 1) {
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memcpy(dst, src, avctx->width * 2);
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src += (interlaced + 1) * pic->linesize[0];
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dst += avctx->width * 2;
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}
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}
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*got_packet = 1;
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return 0;
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}
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const FFCodec ff_avui_encoder = {
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.p.name = "avui",
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CODEC_LONG_NAME("Avid Meridien Uncompressed"),
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.p.type = AVMEDIA_TYPE_VIDEO,
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.p.id = AV_CODEC_ID_AVUI,
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.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_EXPERIMENTAL |
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AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
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.p.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_UYVY422, AV_PIX_FMT_NONE },
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.init = avui_encode_init,
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FF_CODEC_ENCODE_CB(avui_encode_frame),
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};
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