Function ff_decklink_init_device

libavdevice/decklink_common.cpp:670–711

}

int ff_decklink_init_device(AVFormatContext *avctx, const char* name)
{
    struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
    struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
    IDeckLink *dl = NULL;
    IDeckLinkIterator *iter = decklink_create_iterator(avctx);
    if (!iter)
        return AVERROR_EXTERNAL;

    while (iter->Next(&dl) == S_OK) {
        const char *display_name = NULL;
        const char *unique_name = NULL;
        decklink_get_attr_string(dl, BMDDeckLinkDisplayName, &display_name);
        decklink_get_attr_string(dl, BMDDeckLinkDeviceHandle, &unique_name);
        if (display_name && !strcmp(name, display_name) || unique_name && !strcmp(name, unique_name)) {
            av_free((void *)unique_name);
            av_free((void *)display_name);
            ctx->dl = dl;
            break;
        }
        av_free((void *)display_name);
        av_free((void *)unique_name);
        dl->Release();
    }
    iter->Release();
    if (!ctx->dl)
        return AVERROR(ENXIO);

    if (ctx->dl->QueryInterface(IID_IDeckLinkConfiguration, (void **)&ctx->cfg) != S_OK) {
        av_log(avctx, AV_LOG_ERROR, "Could not get configuration interface for '%s'\n", name);
        ff_decklink_cleanup(avctx);
        return AVERROR_EXTERNAL;
    }

    if (ctx->dl->QueryInterface(IID_IDeckLinkProfileAttributes, (void **)&ctx->attr) != S_OK) {
        av_log(avctx, AV_LOG_ERROR, "Could not get attributes interface for '%s'\n", name);
        ff_decklink_cleanup(avctx);
        return AVERROR_EXTERNAL;
    }

    return 0;
}