hwc_video.h revision c4d034f4b8d12953632907d30c0b78856d829579 
1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 * Copyright (C) 2012, Code Aurora Forum. All rights reserved.
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 *      http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17#ifndef HWC_VIDEO_H
18#define HWC_VIDEO_H
19#include "hwc_utils.h"
20
21#define LIKELY( exp )       (__builtin_expect( (exp) != 0, true  ))
22#define UNLIKELY( exp )     (__builtin_expect( (exp) != 0, false ))
23
24namespace qhwc {
25//Feature for using overlay to display videos.
26class VideoOverlay {
27public:
28    //Sets up members and prepares overlay if conditions are met
29    static bool prepare(hwc_context_t *ctx, hwc_display_contents_1_t *list,
30            int dpy);
31    //Draws layer if this feature is on
32    static bool draw(hwc_context_t *ctx, hwc_display_contents_1_t *list,
33            int dpy);
34    //resets values
35    static void reset();
36private:
37    //Choose an appropriate overlay state based on conditions
38    static void chooseState(hwc_context_t *ctx, int dpy,
39        hwc_layer_1_t *yuvLayer);
40    //Configures overlay for video prim and ext
41    static bool configure(hwc_context_t *ctx, int dpy,
42            hwc_layer_1_t *yuvlayer);
43    //Marks layer flags if this feature is used
44    static void markFlags(hwc_layer_1_t *yuvLayer);
45    //The chosen overlay state.
46    static ovutils::eOverlayState sState[HWC_NUM_DISPLAY_TYPES];
47    //Flags if this feature is on.
48    static bool sIsModeOn[HWC_NUM_DISPLAY_TYPES];
49};
50
51inline void VideoOverlay::reset() {
52    for(uint32_t i = 0; i < HWC_NUM_DISPLAY_TYPES; i++) {
53        sIsModeOn[i] = false;
54        sState[i] = ovutils::OV_CLOSED;
55    }
56}
57}; //namespace qhwc
58
59#endif //HWC_VIDEO_H
60