VideoFormats.h revision 94a483bf2bd699275673d9cd57cb125d48572f30 
1/*
2 * Copyright 2013, The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *     http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef VIDEO_FORMATS_H_
18
19#define VIDEO_FORMATS_H_
20
21#include <media/stagefright/foundation/ABase.h>
22
23#include <stdint.h>
24
25namespace android {
26
27struct AString;
28
29// This class encapsulates that video resolution capabilities of a wfd source
30// or sink as outlined in the wfd specs. Currently three sets of resolutions
31// are specified, each of which supports up to 32 resolutions.
32// In addition to its capabilities each sink/source also publishes its
33// "native" resolution, presumably one that is preferred among all others
34// because it wouldn't require any scaling and directly corresponds to the
35// display capabilities/pixels.
36struct VideoFormats {
37    VideoFormats();
38
39    enum ResolutionType {
40        RESOLUTION_CEA,
41        RESOLUTION_VESA,
42        RESOLUTION_HH,
43        kNumResolutionTypes,
44    };
45
46    void setNativeResolution(ResolutionType type, size_t index);
47    void getNativeResolution(ResolutionType *type, size_t *index) const;
48
49    void disableAll();
50    void enableAll();
51
52    void setResolutionEnabled(
53            ResolutionType type, size_t index, bool enabled = true);
54
55    bool isResolutionEnabled(ResolutionType type, size_t index) const;
56
57    static bool GetConfiguration(
58            ResolutionType type, size_t index,
59            size_t *width, size_t *height, size_t *framesPerSecond,
60            bool *interlaced);
61
62    bool parseFormatSpec(const char *spec);
63    AString getFormatSpec() const;
64
65    static bool PickBestFormat(
66            const VideoFormats &sinkSupported,
67            const VideoFormats &sourceSupported,
68            ResolutionType *chosenType,
69            size_t *chosenIndex);
70
71private:
72    ResolutionType mNativeType;
73    size_t mNativeIndex;
74
75    uint32_t mResolutionEnabled[kNumResolutionTypes];
76
77    DISALLOW_EVIL_CONSTRUCTORS(VideoFormats);
78};
79
80}  // namespace android
81
82#endif  // VIDEO_FORMATS_H_
83
84