VideoEditorSRC.h revision 643290dc4c83da23b1b8ff4ed71118203274bb15 
1/*
2 * Copyright (C) 2011 NXP Software
3 * Copyright (C) 2011 The Android Open Source Project
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
18#include <utils/RefBase.h>
19#include <media/stagefright/MediaErrors.h>
20
21#include <media/stagefright/MediaSource.h>
22#include <media/stagefright/MediaBuffer.h>
23#include <media/stagefright/MediaBufferGroup.h>
24#include <media/stagefright/MediaDefs.h>
25
26#include "AudioBufferProvider.h"
27#include "AudioResampler.h"
28
29namespace android {
30//struct MediaSource;
31
32
33class VideoEditorSRC : public MediaSource , public AudioBufferProvider {
34
35    public:
36        VideoEditorSRC(
37            const sp<MediaSource> &source);
38
39        virtual status_t start (MetaData *params = NULL);
40        virtual status_t stop();
41        virtual sp<MetaData> getFormat();
42        virtual status_t read (
43            MediaBuffer **buffer, const ReadOptions *options = NULL);
44
45        virtual status_t getNextBuffer(Buffer* buffer);
46        virtual void releaseBuffer(Buffer* buffer);
47
48        void setResampling(int32_t sampleRate=kFreq32000Hz);
49
50    enum { //Sampling freq
51        kFreq8000Hz = 8000,
52     kFreq11025Hz = 11025,
53     kFreq12000Hz = 12000,
54     kFreq16000Hz = 16000,
55     kFreq22050Hz = 22050,
56     kFreq240000Hz = 24000,
57     kFreq32000Hz = 32000,
58     kFreq44100 = 44100,
59     kFreq48000 = 48000,
60    };
61
62    static const uint16_t UNITY_GAIN = 0x1000;
63    static const int32_t DEFAULT_SAMPLING_FREQ = (int32_t)kFreq32000Hz; // kFreq44100;
64
65    protected :
66        virtual ~VideoEditorSRC();
67    private:
68
69        VideoEditorSRC();
70        VideoEditorSRC &operator=(const VideoEditorSRC &);
71
72        AudioResampler        *mResampler;
73        AudioBufferProvider  *mbufferProvider;
74        sp<MediaSource>      mSource;
75        MediaBuffer      *mCopyBuffer;
76        MediaBufferGroup *mGroup;
77        uint8_t *mInputByteBuffer;
78        int32_t mInputBufferLength;
79        int mInputFrameSize;
80        int mBitDepth;
81        int mChannelCnt;
82        int mSampleRate;
83        int32_t mOutputSampleRate;
84        bool mStarted;
85        bool mIsResamplingRequired;
86        bool mIsChannelConvertionRequired; // for mono to stereo
87        sp<MetaData> mOutputFormat;
88        Mutex mLock;
89        int32_t *pTmpBuffer;
90
91        uint8_t* pInterframeBuffer;
92        int32_t mInterframeBufferPosition;
93        int32_t mLeftover;
94        int32_t mLastReadSize ;
95
96        int64_t mInitialTimeStampUs;
97        int64_t mAccuOutBufferSize;
98
99        int64_t mSeekTimeUs;
100        ReadOptions::SeekMode mSeekMode;
101
102};
103
104} //namespce android
105
106