C++ (Cpp) ff_mjpeg_decode_init Beispiele

Beispiel #1

Datei: avrndec.c Projekt: gaoxiong/VideoReverse

static av_cold int init(AVCodecContext *avctx)
{
    AVRnContext *a = avctx->priv_data;

    // Support "Resolution 1:1" for Avid AVI Codec
    a->is_mjpeg = avctx->extradata_size < 31 || memcmp(&avctx->extradata[28], "1:1", 3);

    if(a->is_mjpeg)
        return ff_mjpeg_decode_init(avctx);

    if(avctx->width <= 0 || avctx->height <= 0)
        return -1;

    avcodec_get_frame_defaults(&a->frame);
    avctx->pix_fmt = PIX_FMT_UYVY422;

    if(avctx->extradata_size >= 9 && avctx->extradata[4]+28 < avctx->extradata_size) {
        int ndx = avctx->extradata[4] + 4;
        a->interlace = !memcmp(avctx->extradata + ndx, "1:1(", 4);
        if(a->interlace) {
            a->tff = avctx->extradata[ndx + 24] == 1;
        }
    }

    return 0;
}

Beispiel #2

Datei: avrndec.c Projekt: OpenEmu/VICE-Core

static av_cold int init(AVCodecContext *avctx)
{
    AVRnContext *a = avctx->priv_data;
    int ret;

    // Support "Resolution 1:1" for Avid AVI Codec
    a->is_mjpeg = avctx->extradata_size < 31 || memcmp(&avctx->extradata[28], "1:1", 3);

    if(!a->is_mjpeg && avctx->lowres) {
        av_log(avctx, AV_LOG_ERROR, "lowres is not possible with rawvideo\n");
        return AVERROR(EINVAL);
    }

    if(a->is_mjpeg)
        return ff_mjpeg_decode_init(avctx);

    if ((ret = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0)
        return ret;

    avctx->pix_fmt = AV_PIX_FMT_UYVY422;

    if(avctx->extradata_size >= 9 && avctx->extradata[4]+28 < avctx->extradata_size) {
        int ndx = avctx->extradata[4] + 4;
        a->interlace = !memcmp(avctx->extradata + ndx, "1:1(", 4);
        if(a->interlace) {
            a->tff = avctx->extradata[ndx + 24] == 1;
        }
    }

    return 0;
}