Function read_header_vs

libavformat/vapoursynth.c:221–361

}

static av_cold int read_header_vs(AVFormatContext *s)
{
    AVStream *st;
    AVIOContext *pb = s->pb;
    VSContext *vs = s->priv_data;
    VSScriptGetAPIFunc get_vssapi;
    int64_t sz = avio_size(pb);
    char *buf = NULL;
    char dummy;
    char vsfmt[32];
    const VSVideoInfo *info;
    struct VSState *vss_state;
    int err = 0;

    if (!(vs->vslibrary = vs_load_library(&get_vssapi))) {
        av_log(s, AV_LOG_ERROR, "Could not open " VSSCRIPT_LIB ". "
                                "Check VapourSynth installation.\n");
        err = AVERROR_EXTERNAL;
        goto done;
    }

    if (!(vs->vssapi = get_vssapi(VSSCRIPT_API_VERSION))) {
        av_log(s, AV_LOG_ERROR, "Failed to initialize VSScript (possibly PYTHONPATH not set).\n");
        err = AVERROR_EXTERNAL;
        goto done;
    }

    if (!(vs->vsapi = vs->vssapi->getVSAPI(VAPOURSYNTH_API_VERSION))) {
        av_log(s, AV_LOG_ERROR, "Could not get VSAPI. "
                                "Check VapourSynth installation.\n");
        err = AVERROR_EXTERNAL;
        goto done;
    }

    vss_state = av_mallocz(sizeof(*vss_state));
    if (!vss_state) {
        err = AVERROR(ENOMEM);
        goto done;
    }
    vss_state->vssapi = vs->vssapi;

    vs->vss_state = av_buffer_create(NULL, 0, free_vss_state, vss_state, 0);
    if (!vs->vss_state) {
        err = AVERROR(ENOMEM);
        av_free(vss_state);
        goto done;
    }

    if (!(vss_state->vss = vs->vssapi->createScript(NULL))) {
        av_log(s, AV_LOG_ERROR, "Failed to create script instance.\n");
        err = AVERROR_EXTERNAL;
        goto done;
    }

    if (sz < 0 || sz > vs->max_script_size) {
        if (sz < 0)
            av_log(s, AV_LOG_WARNING, "Could not determine file size\n");
        sz = vs->max_script_size;