mirror of
https://github.com/FFmpeg/FFmpeg.git
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114 lines
3.4 KiB
C
114 lines
3.4 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 "internal.h"
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static av_cold int avui_encode_init(AVCodecContext *avctx)
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{
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avctx->coded_frame = av_frame_alloc();
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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->coded_frame) {
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av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
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return AVERROR(ENOMEM);
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}
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if (!(avctx->extradata = av_mallocz(24 + FF_INPUT_BUFFER_PADDING_SIZE)))
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return AVERROR(ENOMEM);
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avctx->extradata_size = 24;
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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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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_alloc_packet2(avctx, pkt, size)) < 0)
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return ret;
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dst = pkt->data;
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if (!interlaced) {
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dst += avctx->width * skip;
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}
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avctx->coded_frame->key_frame = 1;
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avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
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for (i = 0; i <= interlaced; i++) {
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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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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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pkt->flags |= AV_PKT_FLAG_KEY;
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*got_packet = 1;
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return 0;
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}
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static av_cold int avui_encode_close(AVCodecContext *avctx)
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{
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av_freep(&avctx->coded_frame);
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return 0;
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}
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AVCodec ff_avui_encoder = {
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.name = "avui",
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.long_name = NULL_IF_CONFIG_SMALL("Avid Meridien Uncompressed"),
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_AVUI,
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.init = avui_encode_init,
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.encode2 = avui_encode_frame,
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.close = avui_encode_close,
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.capabilities = CODEC_CAP_EXPERIMENTAL,
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.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_UYVY422, AV_PIX_FMT_NONE },
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};
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