rawenc.c 2.54 KB
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/*
 * Raw Video Encoder
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 * Copyright (c) 2001 Fabrice Bellard
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 *
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 * This file is part of Libav.
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 *
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 * Libav is free software; you can redistribute it and/or
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 * 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.
 *
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 * Libav is distributed in the hope that it will be useful,
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 * 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
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 * License along with Libav; 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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 * @file
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 * Raw Video Encoder
 */

#include "avcodec.h"
#include "raw.h"
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#include "internal.h"
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#include "libavutil/pixdesc.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/internal.h"
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static av_cold int raw_init_encoder(AVCodecContext *avctx)
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{
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    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);

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    avctx->coded_frame            = avctx->priv_data;
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    avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
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    avctx->coded_frame->key_frame = 1;
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    avctx->bits_per_coded_sample = av_get_bits_per_pixel(desc);
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    if(!avctx->codec_tag)
        avctx->codec_tag = avcodec_pix_fmt_to_codec_tag(avctx->pix_fmt);
    return 0;
}

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static int raw_encode(AVCodecContext *avctx, AVPacket *pkt,
                      const AVFrame *frame, int *got_packet)
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{
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    int ret = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);

    if (ret < 0)
        return ret;

    if ((ret = ff_alloc_packet(pkt, ret)) < 0)
        return ret;
    if ((ret = avpicture_layout((const AVPicture *)frame, avctx->pix_fmt, avctx->width,
                                avctx->height, pkt->data, pkt->size)) < 0)
        return ret;
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    if(avctx->codec_tag == AV_RL32("yuv2") && ret > 0 &&
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       avctx->pix_fmt   == AV_PIX_FMT_YUYV422) {
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        int x;
        for(x = 1; x < avctx->height*avctx->width*2; x += 2)
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            pkt->data[x] ^= 0x80;
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    }
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    pkt->flags |= AV_PKT_FLAG_KEY;
    *got_packet = 1;
    return 0;
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}

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AVCodec ff_rawvideo_encoder = {
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    .name           = "rawvideo",
    .type           = AVMEDIA_TYPE_VIDEO,
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    .id             = AV_CODEC_ID_RAWVIDEO,
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    .priv_data_size = sizeof(AVFrame),
    .init           = raw_init_encoder,
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    .encode2        = raw_encode,
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    .long_name      = NULL_IF_CONFIG_SMALL("raw video"),
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};