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      1 /*
      2  * Copyright (C) 2010 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 ANOTHER_PACKET_SOURCE_H_
     18 
     19 #define ANOTHER_PACKET_SOURCE_H_
     20 
     21 #include <media/stagefright/foundation/ABase.h>
     22 #include <media/stagefright/MediaSource.h>
     23 #include <utils/threads.h>
     24 #include <utils/List.h>
     25 
     26 #include "ATSParser.h"
     27 
     28 namespace android {
     29 
     30 struct ABuffer;
     31 
     32 struct AnotherPacketSource : public MediaSource {
     33     AnotherPacketSource(const sp<MetaData> &meta);
     34 
     35     void setFormat(const sp<MetaData> &meta);
     36 
     37     virtual status_t start(MetaData *params = NULL);
     38     virtual status_t stop();
     39     virtual sp<MetaData> getFormat();
     40 
     41     virtual status_t read(
     42             MediaBuffer **buffer, const ReadOptions *options = NULL);
     43 
     44     void clear();
     45 
     46     bool hasBufferAvailable(status_t *finalResult);
     47 
     48     // Returns the difference between the last and the first queued
     49     // presentation timestamps since the last discontinuity (if any).
     50     int64_t getBufferedDurationUs(status_t *finalResult);
     51 
     52     status_t nextBufferTime(int64_t *timeUs);
     53 
     54     void queueAccessUnit(const sp<ABuffer> &buffer);
     55 
     56     void queueDiscontinuity(
     57             ATSParser::DiscontinuityType type, const sp<AMessage> &extra);
     58 
     59     void signalEOS(status_t result);
     60 
     61     status_t dequeueAccessUnit(sp<ABuffer> *buffer);
     62 
     63     bool isFinished(int64_t duration) const;
     64 
     65 protected:
     66     virtual ~AnotherPacketSource();
     67 
     68 private:
     69     Mutex mLock;
     70     Condition mCondition;
     71 
     72     bool mIsAudio;
     73     sp<MetaData> mFormat;
     74     int64_t mLastQueuedTimeUs;
     75     List<sp<ABuffer> > mBuffers;
     76     status_t mEOSResult;
     77 
     78     bool wasFormatChange(int32_t discontinuityType) const;
     79 
     80     DISALLOW_EVIL_CONSTRUCTORS(AnotherPacketSource);
     81 };
     82 
     83 
     84 }  // namespace android
     85 
     86 #endif  // ANOTHER_PACKET_SOURCE_H_
     87