1/*
2 * Copyright (C) 2011 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
18#include <stdint.h>
19#include <media/stagefright/MediaSource.h>
20#include <media/AudioBufferProvider.h>
21#include "AudioResampler.h"
22
23namespace android {
24
25struct MediaBuffer;
26
27class VideoEditorSRC : public MediaSource , public AudioBufferProvider {
28
29public:
30    VideoEditorSRC(const sp<MediaSource> &source);
31
32    virtual status_t start (MetaData *params = NULL);
33    virtual status_t stop();
34    virtual sp<MetaData> getFormat();
35    virtual status_t read (
36                MediaBuffer **buffer, const ReadOptions *options = NULL);
37
38    virtual status_t getNextBuffer(Buffer* buffer, int64_t pts);
39    virtual void releaseBuffer(Buffer* buffer);
40
41    // Sampling freqencies
42    enum {
43        kFreq8000Hz  = 8000,
44        kFreq11025Hz = 11025,
45        kFreq12000Hz = 12000,
46        kFreq16000Hz = 16000,
47        kFreq22050Hz = 22050,
48        kFreq24000Hz = 24000,
49        kFreq32000Hz = 32000,
50        kFreq44100Hz = 44100,
51        kFreq48000Hz = 48000,
52    };
53
54protected :
55    virtual ~VideoEditorSRC();
56
57private:
58    AudioResampler *mResampler;
59    sp<MediaSource> mSource;
60    int mChannelCnt;
61    int mSampleRate;
62    int32_t mOutputSampleRate;
63    bool mStarted;
64    sp<MetaData> mOutputFormat;
65
66    MediaBuffer* mBuffer;
67    int32_t mLeftover;
68    bool mFormatChanged;
69    bool mStopPending;
70
71    int64_t mInitialTimeStampUs;
72    int64_t mAccuOutBufferSize;
73
74    int64_t mSeekTimeUs;
75    ReadOptions::SeekMode mSeekMode;
76
77    VideoEditorSRC();
78    void checkAndSetResampler();
79
80    // Don't call me
81    VideoEditorSRC(const VideoEditorSRC&);
82    VideoEditorSRC &operator=(const VideoEditorSRC &);
83
84};
85
86} //namespce android
87
88