AACWriter.h revision 760943b5e7a09b602aba04ec451e97662f48b0a4 
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#ifndef AAC_WRITER_H_
18#define AAC_WRITER_H_
19
20#include <media/stagefright/MediaWriter.h>
21#include <utils/threads.h>
22
23namespace android {
24
25struct MediaSource;
26struct MetaData;
27
28struct AACWriter : public MediaWriter {
29    AACWriter(const char *filename);
30    AACWriter(int fd);
31
32    status_t initCheck() const;
33
34    virtual status_t addSource(const sp<MediaSource> &source);
35    virtual bool reachedEOS();
36    virtual status_t start(MetaData *params = NULL);
37    virtual status_t stop();
38    virtual status_t pause();
39
40protected:
41    virtual ~AACWriter();
42
43private:
44    enum {
45        kAdtsHeaderLength = 7,     // # of bytes for the adts header
46        kSamplesPerFrame  = 1024,  // # of samples in a frame
47    };
48
49    int   mFd;
50    status_t mInitCheck;
51    sp<MediaSource> mSource;
52    bool mStarted;
53    volatile bool mPaused;
54    volatile bool mResumed;
55    volatile bool mDone;
56    volatile bool mReachedEOS;
57    pthread_t mThread;
58    int64_t mEstimatedSizeBytes;
59    int64_t mEstimatedDurationUs;
60    int32_t mChannelCount;
61    int32_t mSampleRate;
62    int32_t mFrameDurationUs;
63
64    static void *ThreadWrapper(void *);
65    status_t threadFunc();
66    bool exceedsFileSizeLimit();
67    bool exceedsFileDurationLimit();
68    status_t writeAdtsHeader(uint32_t frameLength);
69
70    DISALLOW_EVIL_CONSTRUCTORS(AACWriter);
71};
72
73}  // namespace android
74
75#endif  // AAC_WRITER_H_
76