C++ (Cpp) choose_implementation Examples

Example #1

File: hwcontext_qsv.c Project: ZhaoliangGuo/FFmpeg

static int qsv_device_create(AVHWDeviceContext *ctx, const char *device,
                             AVDictionary *opts, int flags)
{
    QSVDevicePriv *priv;
    enum AVHWDeviceType child_device_type;
    AVHWDeviceContext *child_device;
    AVDictionaryEntry *e;

    mfxIMPL impl;
    int ret;

    priv = av_mallocz(sizeof(*priv));
    if (!priv)
        return AVERROR(ENOMEM);

    ctx->user_opaque = priv;
    ctx->free        = qsv_device_free;

    e = av_dict_get(opts, "child_device", NULL, 0);

    if (CONFIG_VAAPI)
        child_device_type = AV_HWDEVICE_TYPE_VAAPI;
    else if (CONFIG_DXVA2)
        child_device_type = AV_HWDEVICE_TYPE_DXVA2;
    else {
        av_log(ctx, AV_LOG_ERROR, "No supported child device type is enabled\n");
        return AVERROR(ENOSYS);
    }

    ret = av_hwdevice_ctx_create(&priv->child_device_ctx, child_device_type,
                                 e ? e->value : NULL, NULL, 0);
    if (ret < 0)
        return ret;

    child_device = (AVHWDeviceContext*)priv->child_device_ctx->data;

    impl = choose_implementation(device);

    return qsv_device_derive_from_child(ctx, impl, child_device, 0);
}

Example #2

File: hwcontext_qsv.c Project: Wonderful2014/libav

static int qsv_device_create(AVHWDeviceContext *ctx, const char *device,
                             AVDictionary *opts, int flags)
{
    AVQSVDeviceContext *hwctx = ctx->hwctx;
    QSVDevicePriv *priv;
    enum AVHWDeviceType child_device_type;
    AVDictionaryEntry *e;

    mfxVersion    ver = { { 3, 1 } };
    mfxIMPL       impl;
    mfxHDL        handle;
    mfxHandleType handle_type;
    mfxStatus     err;
    int ret;

    priv = av_mallocz(sizeof(*priv));
    if (!priv)
        return AVERROR(ENOMEM);

    ctx->user_opaque = priv;
    ctx->free        = qsv_device_free;

    e = av_dict_get(opts, "child_device", NULL, 0);

    if (CONFIG_VAAPI)
        child_device_type = AV_HWDEVICE_TYPE_VAAPI;
    else if (CONFIG_DXVA2)
        child_device_type = AV_HWDEVICE_TYPE_DXVA2;
    else {
        av_log(ctx, AV_LOG_ERROR, "No supported child device type is enabled\n");
        return AVERROR(ENOSYS);
    }

    ret = av_hwdevice_ctx_create(&priv->child_device_ctx, child_device_type,
                                 e ? e->value : NULL, NULL, 0);
    if (ret < 0)
        return ret;

    {
        AVHWDeviceContext      *child_device_ctx = (AVHWDeviceContext*)priv->child_device_ctx->data;
#if CONFIG_VAAPI
        AVVAAPIDeviceContext *child_device_hwctx = child_device_ctx->hwctx;
        handle_type = MFX_HANDLE_VA_DISPLAY;
        handle = (mfxHDL)child_device_hwctx->display;
#elif CONFIG_DXVA2
        AVDXVA2DeviceContext *child_device_hwctx = child_device_ctx->hwctx;
        handle_type = MFX_HANDLE_D3D9_DEVICE_MANAGER;
        handle = (mfxHDL)child_device_hwctx->devmgr;
#endif
    }

    impl = choose_implementation(device);

    err = MFXInit(impl, &ver, &hwctx->session);
    if (err != MFX_ERR_NONE) {
        av_log(ctx, AV_LOG_ERROR, "Error initializing an MFX session\n");
        return AVERROR_UNKNOWN;
    }

    err = MFXVideoCORE_SetHandle(hwctx->session, handle_type, handle);
    if (err != MFX_ERR_NONE)
        return AVERROR_UNKNOWN;

    return 0;
}