C++ (Cpp) avfilter_graph_get_filter 예제들

예제 #1

파일: moviedecoder.cpp 프로젝트: KDE/ffmpegthumbs

bool MovieDecoder::initFilterGraph(enum AVPixelFormat pixfmt, int width, int height)
{
    AVFilterInOut *inputs = nullptr, *outputs = nullptr;

    deleteFilterGraph();
    m_filterGraph = avfilter_graph_alloc();

    QByteArray arguments("buffer=");
    arguments += "video_size=" + QByteArray::number(width) + "x" + QByteArray::number(height) + ":";
    arguments += "pix_fmt=" + QByteArray::number(pixfmt) + ":";
    arguments += "time_base=1/1:pixel_aspect=0/1[in];";
    arguments += "[in]yadif[out];";
    arguments += "[out]buffersink";

    int ret = avfilter_graph_parse2(m_filterGraph, arguments.constData(), &inputs, &outputs);
    if (ret < 0) {
        qWarning() << "Unable to parse filter graph";
        return false;
    }

    if(inputs || outputs)
        return -1;

    ret = avfilter_graph_config(m_filterGraph, nullptr);
    if (ret < 0) {
        qWarning() << "Unable to validate filter graph";
        return false;
    }

    m_bufferSourceContext = avfilter_graph_get_filter(m_filterGraph, "Parsed_buffer_0");
    m_bufferSinkContext = avfilter_graph_get_filter(m_filterGraph, "Parsed_buffersink_2");
    if (!m_bufferSourceContext || !m_bufferSinkContext) {
        qWarning() << "Unable to get source or sink";
        return false;
    }
    m_filterFrame = av_frame_alloc();
    m_lastWidth = width;
    m_lastHeight = height;
    m_lastPixfmt = pixfmt;

    return true;
}

예제 #2

파일: filtergraph.cpp 프로젝트: brucechase/avcpp

FilterContext FilterGraph::filter(const string &name, error_code &ec)
{
    clear_if(ec);

    if (!m_raw) {
        throws_if(ec, Errors::Unallocated);
        return FilterContext();
    }

    AVFilterContext *ctx = avfilter_graph_get_filter(m_raw, name.c_str());
    if (!ctx)
        return FilterContext();

    return FilterContext(ctx);
}

예제 #3

파일: org_jitsi_impl_neomedia_codec_FFmpeg.c 프로젝트: Huangzefeng/jitsi-android

JNIEXPORT jlong JNICALL
Java_org_jitsi_impl_neomedia_codec_FFmpeg_avfilter_1graph_1get_1filter
    (JNIEnv *env, jclass clazz, jlong graph, jstring name)
{
    const char *name_ = (*env)->GetStringUTFChars(env, name, NULL);
    AVFilterContext *filter;

    if (name_)
    {
        filter
            = avfilter_graph_get_filter(
                    (AVFilterGraph *) (intptr_t) graph,
                    (char *) name_);
        (*env)->ReleaseStringUTFChars(env, name, name_);
    }
    else
        filter = NULL;
    return (jlong) (intptr_t) filter;
}