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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/ICrypto.h>
     24 #include <media/mediaplayer.h>
     25 #include <media/stagefright/foundation/AMessage.h>
     26 #include <media/stagefright/MetaData.h>
     27 #include <utils/Vector.h>
     28 
     29 namespace android {
     30 
     31 struct ABuffer;
     32 class MediaBuffer;
     33 
     34 struct NuPlayer::Source : public AHandler {
     35     enum Flags {
     36         FLAG_CAN_PAUSE          = 1,
     37         FLAG_CAN_SEEK_BACKWARD  = 2,  // the "10 sec back button"
     38         FLAG_CAN_SEEK_FORWARD   = 4,  // the "10 sec forward button"
     39         FLAG_CAN_SEEK           = 8,  // the "seek bar"
     40         FLAG_DYNAMIC_DURATION   = 16,
     41         FLAG_SECURE             = 32, // Secure codec is required.
     42         FLAG_PROTECTED          = 64, // The screen needs to be protected (screenshot is disabled).
     43     };
     44 
     45     enum {
     46         kWhatPrepared,
     47         kWhatFlagsChanged,
     48         kWhatVideoSizeChanged,
     49         kWhatBufferingUpdate,
     50         kWhatPauseOnBufferingStart,
     51         kWhatResumeOnBufferingEnd,
     52         kWhatCacheStats,
     53         kWhatSubtitleData,
     54         kWhatTimedTextData,
     55         kWhatTimedMetaData,
     56         kWhatQueueDecoderShutdown,
     57         kWhatDrmNoLicense,
     58         kWhatInstantiateSecureDecoders,
     59         // Modular DRM
     60         kWhatDrmInfo,
     61     };
     62 
     63     // The provides message is used to notify the player about various
     64     // events.
     65     explicit Source(const sp<AMessage> &notify)
     66         : mNotify(notify) {
     67     }
     68 
     69     virtual status_t getDefaultBufferingSettings(
     70             BufferingSettings* buffering /* nonnull */) = 0;
     71     virtual status_t setBufferingSettings(const BufferingSettings& buffering) = 0;
     72 
     73     virtual void prepareAsync() = 0;
     74 
     75     virtual void start() = 0;
     76     virtual void stop() {}
     77     virtual void pause() {}
     78     virtual void resume() {}
     79 
     80     // Explicitly disconnect the underling data source
     81     virtual void disconnect() {}
     82 
     83     // Returns OK iff more data was available,
     84     // an error or ERROR_END_OF_STREAM if not.
     85     virtual status_t feedMoreTSData() = 0;
     86 
     87     // Returns non-NULL format when the specified track exists.
     88     // When the format has "err" set to -EWOULDBLOCK, source needs more time to get valid meta data.
     89     // Returns NULL if the specified track doesn't exist or is invalid;
     90     virtual sp<AMessage> getFormat(bool audio);
     91 
     92     virtual sp<MetaData> getFormatMeta(bool /* audio */) { return NULL; }
     93     virtual sp<MetaData> getFileFormatMeta() const { return NULL; }
     94 
     95     virtual status_t dequeueAccessUnit(
     96             bool audio, sp<ABuffer> *accessUnit) = 0;
     97 
     98     virtual status_t getDuration(int64_t * /* durationUs */) {
     99         return INVALID_OPERATION;
    100     }
    101 
    102     virtual size_t getTrackCount() const {
    103         return 0;
    104     }
    105 
    106     virtual sp<AMessage> getTrackInfo(size_t /* trackIndex */) const {
    107         return NULL;
    108     }
    109 
    110     virtual ssize_t getSelectedTrack(media_track_type /* type */) const {
    111         return INVALID_OPERATION;
    112     }
    113 
    114     virtual status_t selectTrack(size_t /* trackIndex */, bool /* select */, int64_t /* timeUs*/) {
    115         return INVALID_OPERATION;
    116     }
    117 
    118     virtual status_t seekTo(
    119             int64_t /* seekTimeUs */,
    120             MediaPlayerSeekMode /* mode */ = MediaPlayerSeekMode::SEEK_PREVIOUS_SYNC) {
    121         return INVALID_OPERATION;
    122     }
    123 
    124     virtual status_t setBuffers(bool /* audio */, Vector<MediaBuffer *> &/* buffers */) {
    125         return INVALID_OPERATION;
    126     }
    127 
    128     virtual bool isRealTime() const {
    129         return false;
    130     }
    131 
    132     virtual bool isStreaming() const {
    133         return true;
    134     }
    135 
    136     virtual void setOffloadAudio(bool /* offload */) {}
    137 
    138     // Modular DRM
    139     virtual status_t prepareDrm(
    140             const uint8_t /*uuid*/[16], const Vector<uint8_t> &/*drmSessionId*/,
    141             sp<ICrypto> */*crypto*/) {
    142         return INVALID_OPERATION;
    143     }
    144 
    145     virtual status_t releaseDrm() {
    146         return INVALID_OPERATION;
    147     }
    148 
    149 protected:
    150     virtual ~Source() {}
    151 
    152     virtual void onMessageReceived(const sp<AMessage> &msg);
    153 
    154     sp<AMessage> dupNotify() const { return mNotify->dup(); }
    155 
    156     void notifyFlagsChanged(uint32_t flags);
    157     void notifyVideoSizeChanged(const sp<AMessage> &format = NULL);
    158     void notifyInstantiateSecureDecoders(const sp<AMessage> &reply);
    159     void notifyPrepared(status_t err = OK);
    160     // Modular DRM
    161     void notifyDrmInfo(const sp<ABuffer> &buffer);
    162 
    163 private:
    164     sp<AMessage> mNotify;
    165 
    166     DISALLOW_EVIL_CONSTRUCTORS(Source);
    167 };
    168 
    169 }  // namespace android
    170 
    171 #endif  // NUPLAYER_SOURCE_H_
    172 
    173