CodecBase.h revision a63141af8f036bda0b8f7800107ca8a0e0623135 
1/*
2 * Copyright (C) 2014 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 CODEC_BASE_H_
18
19#define CODEC_BASE_H_
20
21#include <stdint.h>
22#include <media/IOMX.h>
23
24#include <media/MediaCodecInfo.h>
25#include <media/stagefright/foundation/AHandler.h>
26#include <utils/NativeHandle.h>
27
28namespace android {
29
30struct ABuffer;
31struct PersistentSurface;
32
33struct CodecBase : public AHandler {
34    enum {
35        kWhatFillThisBuffer      = 'fill',
36        kWhatDrainThisBuffer     = 'drai',
37        kWhatEOS                 = 'eos ',
38        kWhatShutdownCompleted   = 'scom',
39        kWhatFlushCompleted      = 'fcom',
40        kWhatOutputFormatChanged = 'outC',
41        kWhatError               = 'erro',
42        kWhatComponentAllocated  = 'cAll',
43        kWhatComponentConfigured = 'cCon',
44        kWhatInputSurfaceCreated = 'isfc',
45        kWhatInputSurfaceAccepted = 'isfa',
46        kWhatSignaledInputEOS    = 'seos',
47        kWhatBuffersAllocated    = 'allc',
48        kWhatOutputFramesRendered = 'outR',
49    };
50
51    virtual void setNotificationMessage(const sp<AMessage> &msg) = 0;
52
53    virtual void initiateAllocateComponent(const sp<AMessage> &msg) = 0;
54    virtual void initiateConfigureComponent(const sp<AMessage> &msg) = 0;
55    virtual void initiateCreateInputSurface() = 0;
56    virtual void initiateSetInputSurface(
57            const sp<PersistentSurface> &surface) = 0;
58    virtual void initiateStart() = 0;
59    virtual void initiateShutdown(bool keepComponentAllocated = false) = 0;
60
61    // require an explicit message handler
62    virtual void onMessageReceived(const sp<AMessage> &msg) = 0;
63
64    virtual status_t queryCapabilities(
65            const AString &name, const AString &mime, bool isEncoder,
66            sp<MediaCodecInfo::Capabilities> *caps /* nonnull */) { return INVALID_OPERATION; }
67
68    virtual status_t setSurface(const sp<Surface> &surface) { return INVALID_OPERATION; }
69
70    virtual void signalFlush() = 0;
71    virtual void signalResume() = 0;
72
73    virtual void signalRequestIDRFrame() = 0;
74    virtual void signalSetParameters(const sp<AMessage> &msg) = 0;
75    virtual void signalEndOfInputStream() = 0;
76
77    struct PortDescription : public RefBase {
78        virtual size_t countBuffers() = 0;
79        virtual IOMX::buffer_id bufferIDAt(size_t index) const = 0;
80        virtual sp<ABuffer> bufferAt(size_t index) const = 0;
81        virtual sp<NativeHandle> handleAt(size_t index) { return NULL; };
82        virtual sp<RefBase> memRefAt(size_t index) const { return NULL; }
83
84    protected:
85        PortDescription();
86        virtual ~PortDescription();
87
88    private:
89        DISALLOW_EVIL_CONSTRUCTORS(PortDescription);
90    };
91
92protected:
93    CodecBase();
94    virtual ~CodecBase();
95
96private:
97    DISALLOW_EVIL_CONSTRUCTORS(CodecBase);
98};
99
100}  // namespace android
101
102#endif  // CODEC_BASE_H_
103
104