1 /* 2 * Copyright (C) 2007 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 ANDROID_MEDIAPLAYERINTERFACE_H 18 #define ANDROID_MEDIAPLAYERINTERFACE_H 19 20 #ifdef __cplusplus 21 22 #include <sys/types.h> 23 #include <utils/Errors.h> 24 #include <utils/KeyedVector.h> 25 #include <utils/String8.h> 26 #include <utils/RefBase.h> 27 28 #include <media/mediaplayer.h> 29 #include <media/AudioSystem.h> 30 #include <media/Metadata.h> 31 32 // Fwd decl to make sure everyone agrees that the scope of struct sockaddr_in is 33 // global, and not in android:: 34 struct sockaddr_in; 35 36 namespace android { 37 38 class Parcel; 39 class Surface; 40 class IGraphicBufferProducer; 41 42 template<typename T> class SortedVector; 43 44 enum player_type { 45 PV_PLAYER = 1, 46 SONIVOX_PLAYER = 2, 47 STAGEFRIGHT_PLAYER = 3, 48 NU_PLAYER = 4, 49 // Test players are available only in the 'test' and 'eng' builds. 50 // The shared library with the test player is passed passed as an 51 // argument to the 'test:' url in the setDataSource call. 52 TEST_PLAYER = 5, 53 }; 54 55 56 #define DEFAULT_AUDIOSINK_BUFFERCOUNT 4 57 #define DEFAULT_AUDIOSINK_BUFFERSIZE 1200 58 #define DEFAULT_AUDIOSINK_SAMPLERATE 44100 59 60 // when the channel mask isn't known, use the channel count to derive a mask in AudioSink::open() 61 #define CHANNEL_MASK_USE_CHANNEL_ORDER 0 62 63 // duration below which we do not allow deep audio buffering 64 #define AUDIO_SINK_MIN_DEEP_BUFFER_DURATION_US 5000000 65 66 // callback mechanism for passing messages to MediaPlayer object 67 typedef void (*notify_callback_f)(void* cookie, 68 int msg, int ext1, int ext2, const Parcel *obj); 69 70 // abstract base class - use MediaPlayerInterface 71 class MediaPlayerBase : public RefBase 72 { 73 public: 74 // AudioSink: abstraction layer for audio output 75 class AudioSink : public RefBase { 76 public: 77 enum cb_event_t { 78 CB_EVENT_FILL_BUFFER, // Request to write more data to buffer. 79 CB_EVENT_STREAM_END, // Sent after all the buffers queued in AF and HW are played 80 // back (after stop is called) 81 CB_EVENT_TEAR_DOWN // The AudioTrack was invalidated due to use case change: 82 // Need to re-evaluate offloading options 83 }; 84 85 // Callback returns the number of bytes actually written to the buffer. 86 typedef size_t (*AudioCallback)( 87 AudioSink *audioSink, void *buffer, size_t size, void *cookie, 88 cb_event_t event); 89 90 virtual ~AudioSink() {} 91 virtual bool ready() const = 0; // audio output is open and ready 92 virtual bool realtime() const = 0; // audio output is real-time output 93 virtual ssize_t bufferSize() const = 0; 94 virtual ssize_t frameCount() const = 0; 95 virtual ssize_t channelCount() const = 0; 96 virtual ssize_t frameSize() const = 0; 97 virtual uint32_t latency() const = 0; 98 virtual float msecsPerFrame() const = 0; 99 virtual status_t getPosition(uint32_t *position) const = 0; 100 virtual status_t getFramesWritten(uint32_t *frameswritten) const = 0; 101 virtual int getSessionId() const = 0; 102 103 // If no callback is specified, use the "write" API below to submit 104 // audio data. 105 virtual status_t open( 106 uint32_t sampleRate, int channelCount, audio_channel_mask_t channelMask, 107 audio_format_t format=AUDIO_FORMAT_PCM_16_BIT, 108 int bufferCount=DEFAULT_AUDIOSINK_BUFFERCOUNT, 109 AudioCallback cb = NULL, 110 void *cookie = NULL, 111 audio_output_flags_t flags = AUDIO_OUTPUT_FLAG_NONE, 112 const audio_offload_info_t *offloadInfo = NULL) = 0; 113 114 virtual status_t start() = 0; 115 virtual ssize_t write(const void* buffer, size_t size) = 0; 116 virtual void stop() = 0; 117 virtual void flush() = 0; 118 virtual void pause() = 0; 119 virtual void close() = 0; 120 121 virtual status_t setPlaybackRatePermille(int32_t rate) { return INVALID_OPERATION; } 122 virtual bool needsTrailingPadding() { return true; } 123 124 virtual status_t setParameters(const String8& keyValuePairs) { return NO_ERROR; }; 125 virtual String8 getParameters(const String8& keys) { return String8::empty(); }; 126 }; 127 128 MediaPlayerBase() : mCookie(0), mNotify(0) {} 129 virtual ~MediaPlayerBase() {} 130 virtual status_t initCheck() = 0; 131 virtual bool hardwareOutput() = 0; 132 133 virtual status_t setUID(uid_t uid) { 134 return INVALID_OPERATION; 135 } 136 137 virtual status_t setDataSource( 138 const char *url, 139 const KeyedVector<String8, String8> *headers = NULL) = 0; 140 141 virtual status_t setDataSource(int fd, int64_t offset, int64_t length) = 0; 142 143 virtual status_t setDataSource(const sp<IStreamSource> &source) { 144 return INVALID_OPERATION; 145 } 146 147 // pass the buffered IGraphicBufferProducer to the media player service 148 virtual status_t setVideoSurfaceTexture( 149 const sp<IGraphicBufferProducer>& bufferProducer) = 0; 150 151 virtual status_t prepare() = 0; 152 virtual status_t prepareAsync() = 0; 153 virtual status_t start() = 0; 154 virtual status_t stop() = 0; 155 virtual status_t pause() = 0; 156 virtual bool isPlaying() = 0; 157 virtual status_t seekTo(int msec) = 0; 158 virtual status_t getCurrentPosition(int *msec) = 0; 159 virtual status_t getDuration(int *msec) = 0; 160 virtual status_t reset() = 0; 161 virtual status_t setLooping(int loop) = 0; 162 virtual player_type playerType() = 0; 163 virtual status_t setParameter(int key, const Parcel &request) = 0; 164 virtual status_t getParameter(int key, Parcel *reply) = 0; 165 166 // default no-op implementation of optional extensions 167 virtual status_t setRetransmitEndpoint(const struct sockaddr_in* endpoint) { 168 return INVALID_OPERATION; 169 } 170 virtual status_t getRetransmitEndpoint(struct sockaddr_in* endpoint) { 171 return INVALID_OPERATION; 172 } 173 virtual status_t setNextPlayer(const sp<MediaPlayerBase>& next) { 174 return OK; 175 } 176 177 // Invoke a generic method on the player by using opaque parcels 178 // for the request and reply. 179 // 180 // @param request Parcel that is positioned at the start of the 181 // data sent by the java layer. 182 // @param[out] reply Parcel to hold the reply data. Cannot be null. 183 // @return OK if the call was successful. 184 virtual status_t invoke(const Parcel& request, Parcel *reply) = 0; 185 186 // The Client in the MetadataPlayerService calls this method on 187 // the native player to retrieve all or a subset of metadata. 188 // 189 // @param ids SortedList of metadata ID to be fetch. If empty, all 190 // the known metadata should be returned. 191 // @param[inout] records Parcel where the player appends its metadata. 192 // @return OK if the call was successful. 193 virtual status_t getMetadata(const media::Metadata::Filter& ids, 194 Parcel *records) { 195 return INVALID_OPERATION; 196 }; 197 198 void setNotifyCallback( 199 void* cookie, notify_callback_f notifyFunc) { 200 Mutex::Autolock autoLock(mNotifyLock); 201 mCookie = cookie; mNotify = notifyFunc; 202 } 203 204 void sendEvent(int msg, int ext1=0, int ext2=0, 205 const Parcel *obj=NULL) { 206 Mutex::Autolock autoLock(mNotifyLock); 207 if (mNotify) mNotify(mCookie, msg, ext1, ext2, obj); 208 } 209 210 virtual status_t dump(int fd, const Vector<String16> &args) const { 211 return INVALID_OPERATION; 212 } 213 214 virtual status_t updateProxyConfig( 215 const char *host, int32_t port, const char *exclusionList) { 216 return INVALID_OPERATION; 217 } 218 219 private: 220 friend class MediaPlayerService; 221 222 Mutex mNotifyLock; 223 void* mCookie; 224 notify_callback_f mNotify; 225 }; 226 227 // Implement this class for media players that use the AudioFlinger software mixer 228 class MediaPlayerInterface : public MediaPlayerBase 229 { 230 public: 231 virtual ~MediaPlayerInterface() { } 232 virtual bool hardwareOutput() { return false; } 233 virtual void setAudioSink(const sp<AudioSink>& audioSink) { mAudioSink = audioSink; } 234 protected: 235 sp<AudioSink> mAudioSink; 236 }; 237 238 // Implement this class for media players that output audio directly to hardware 239 class MediaPlayerHWInterface : public MediaPlayerBase 240 { 241 public: 242 virtual ~MediaPlayerHWInterface() {} 243 virtual bool hardwareOutput() { return true; } 244 virtual status_t setVolume(float leftVolume, float rightVolume) = 0; 245 virtual status_t setAudioStreamType(audio_stream_type_t streamType) = 0; 246 }; 247 248 }; // namespace android 249 250 #endif // __cplusplus 251 252 253 #endif // ANDROID_MEDIAPLAYERINTERFACE_H 254
