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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 NUPLAYER_SOURCE_H_
     18 
     19 #define NUPLAYER_SOURCE_H_
     20 
     21 #include "NuPlayer.h"
     22 
     23 #include <media/stagefright/foundation/AMessage.h>
     24 
     25 namespace android {
     26 
     27 struct ABuffer;
     28 struct MetaData;
     29 
     30 struct NuPlayer::Source : public AHandler {
     31     enum Flags {
     32         FLAG_CAN_PAUSE          = 1,
     33         FLAG_CAN_SEEK_BACKWARD  = 2,  // the "10 sec back button"
     34         FLAG_CAN_SEEK_FORWARD   = 4,  // the "10 sec forward button"
     35         FLAG_CAN_SEEK           = 8,  // the "seek bar"
     36         FLAG_DYNAMIC_DURATION   = 16,
     37     };
     38 
     39     enum {
     40         kWhatPrepared,
     41         kWhatFlagsChanged,
     42         kWhatVideoSizeChanged,
     43         kWhatBufferingStart,
     44         kWhatBufferingEnd,
     45         kWhatSubtitleData,
     46         kWhatQueueDecoderShutdown,
     47     };
     48 
     49     // The provides message is used to notify the player about various
     50     // events.
     51     Source(const sp<AMessage> &notify)
     52         : mNotify(notify) {
     53     }
     54 
     55     virtual void prepareAsync() = 0;
     56 
     57     virtual void start() = 0;
     58     virtual void stop() {}
     59     virtual void pause() {}
     60     virtual void resume() {}
     61 
     62     // Returns OK iff more data was available,
     63     // an error or ERROR_END_OF_STREAM if not.
     64     virtual status_t feedMoreTSData() = 0;
     65 
     66     virtual sp<AMessage> getFormat(bool audio);
     67 
     68     virtual status_t dequeueAccessUnit(
     69             bool audio, sp<ABuffer> *accessUnit) = 0;
     70 
     71     virtual status_t getDuration(int64_t *durationUs) {
     72         return INVALID_OPERATION;
     73     }
     74 
     75     virtual status_t getTrackInfo(Parcel* reply) const {
     76         return INVALID_OPERATION;
     77     }
     78 
     79     virtual status_t selectTrack(size_t trackIndex, bool select) {
     80         return INVALID_OPERATION;
     81     }
     82 
     83     virtual status_t seekTo(int64_t seekTimeUs) {
     84         return INVALID_OPERATION;
     85     }
     86 
     87     virtual bool isRealTime() const {
     88         return false;
     89     }
     90 
     91 protected:
     92     virtual ~Source() {}
     93 
     94     virtual void onMessageReceived(const sp<AMessage> &msg);
     95 
     96     virtual sp<MetaData> getFormatMeta(bool audio) { return NULL; }
     97 
     98     sp<AMessage> dupNotify() const { return mNotify->dup(); }
     99 
    100     void notifyFlagsChanged(uint32_t flags);
    101     void notifyVideoSizeChanged(int32_t width, int32_t height);
    102     void notifyPrepared(status_t err = OK);
    103 
    104 private:
    105     sp<AMessage> mNotify;
    106 
    107     DISALLOW_EVIL_CONSTRUCTORS(Source);
    108 };
    109 
    110 }  // namespace android
    111 
    112 #endif  // NUPLAYER_SOURCE_H_
    113 
    114