Changes in this update:
**Enhancements**
- Added support for SpeechSynthesizer v.1.2 which includes the new `playBehaviour` directive. For more information, see [SpeechSynthesizer v1.2](https://github.com/alexa/avs-device-sdk/wiki/SpeechSynthesizer-Interface-v1.2).
- Added support for pre-buffering in [AudioPlayer](https://alexa.github.io/avs-device-sdk/classalexa_client_s_d_k_1_1capability_agents_1_1audio_player_1_1_audio_player.html). You can optionally choose the number of instances MediaPlayer uses in the [AlexaClientSDKconfig.json](https://github.com/alexa/avs-device-sdk/blob/master/Integration/AlexaClientSDKConfig.json). Important: the contract for [MediaPlayerInterface](https://alexa.github.io/avs-device-sdk/classalexa_client_s_d_k_1_1avs_common_1_1utils_1_1media_player_1_1_media_player_interface.html) has changed. You must now make sure that the `SourceId` value returned by `setSource()` is unique across all instances.
- AudioPlayer is now licensed under the Amazon Software License instead of the Apache Software License.
**Bug Fixes**
- Fixed Android issue that caused the build script to ignore PKG_CONFIG_PATH. This sometimes caused the build to use a preinstalled dependency instead of the specific version downloaded by the Android script (e.g - openssl).
- Fixed Android issue that prevented the Sample app from running at the same time as other applications using the microphone. Android doesn't inherently allow two applications to use the microphone. Pressing the mute button now temporarily stops Alexa from accessing the microphone.
- Added 'quit' (– q) to the settings sub menu.
- Fixed outdated dependencies issue in the Windows install script.
- Fixed reminders issue that caused Notification LEDs to stay on, even after dismissing the alert.
**Known Issues**
* Music playback history isn't displayed in the Alexa app for certain account and device types.
* When using Gnu Compiler Collection 8+ (GCC 8+), `-Wclass-memaccess` triggers warnings. You can ignore these, they don't cause the build to fail.
* Android error `libDefaultClient.so not found` might occur. Resolve this by upgrading to ADB version 1.0.40.
* If a device loses a network connection, the lost connection status isn't returned via local TTS.
* ACL encounters issues if it receives audio attachments but doesn't consume them.
* `SpeechSynthesizerState` uses `GAINING_FOCUS` and `LOSING_FOCUS` as a workaround for handling intermediate states.
* Media steamed through Bluetooth might abruptly stop. To restart playback, resume the media in the source application or toggle next/previous.
* If a connected Bluetooth device is inactive, the Alexa app might indicates that audio is playing.
* The Bluetooth agent assumes that the Bluetooth adapter is always connected to a power source. Disconnecting from a power source during operation isn't yet supported.
* When using some products, interrupted Bluetooth playback might not resume if other content is locally streamed.
* `make integration` isn't available for Android. To run Android integration tests, manually upload the test binary and input file and run ADB.
* Alexa might truncate the beginning of speech when responding to text-to-speech (TTS) user events. This only impacts Raspberry Pi devices running Android Things with HDMI output audio.
* A reminder TTS message doesn't play if the sample app restarts and loses a network connection. Instead, the default alarm tone plays twice.
* `ServerDisconnectIntegratonTest` tests are disabled until they are updated to reflect new service behavior.
* Bluetooth initialization must complete before connecting devices, otherwise devices are ignored.
* The `DirectiveSequencerTest.test_handleBlockingThenImmediatelyThenNonBockingOnSameDialogId` test fails intermittently.
* On some devices, Alexa gets stuck in a permanent listening state. Pressing `t` and `h` in the Sample App doesn't exit the listening state.
* Exiting the `settings` menu doesn't provide a message to indicate that you are back in the main menu.
Changes in this update:
**Enhancements**
* Added `SystemSoundPlayer` to [ApplicationUtilities](https://alexa.github.io/avs-device-sdk/namespacealexa_client_s_d_k_1_1application_utilities.html). `SystemSoundPlayer` is a new class that plays pre-defined sounds. Sounds currently supported include the wake word notification and the end of speech tone. This change is internal and you don't need to update your code.
* Removed [Echo Spatial Perception (ESP)](https://developer.amazon.com/blogs/alexa/post/042be85c-5a62-4c55-a18d-d7a82cf394df/esp-moves-to-the-cloud-for-alexa-enabled-devices) functionality from the Alexa Voice Service (AVS) device SDK. Make sure you download and test your devices using the new AVS SDK sample app. If you're using an older version of the sample app, manually remove any references to ESP or errors occur during compile.
* Added `onNotificationReceived` to `NotificationsObserverInterface`. `onNotificationReceived` broadcasts when `NotificationsObserverInterface` receives a new notification, instead of only sending the indicator state. This is important if you support a feature that requires a distinct signal for each notification received. See [NotificationsObserverInterface](https://alexa.github.io/avs-device-sdk/classalexa_client_s_d_k_1_1avs_common_1_1sdk_interfaces_1_1_notifications_observer_interface.html) for more details.
* Added support for [Multilingual Mode](https://developer.amazon.com/docs/alexa-voice-service/system.html#localecombinations). With this enabled, Alexa automatically detects what language a user speaks by analyzing the spoken wake word and proceeding utterances. Once Alexa identifies the language, all corresponding responses are in the same language. The current supported language pairs are:
- `[ "en-US", "es-US" ]`
- `[ "es-US", "en-US" ]`
- `[ "en-IN", "hi-IN" ]`
- `[ "hi-IN", "en-IN" ]`
- `[ "en-CA", "fr-CA" ]`
- `[ "fr-CA", "en-CA" ]`
<br/> **IMPORTANT**: Specify the locales your device supports in the [localeCombinations](https://developer.amazon.com/docs/alexa-voice-service/system.html#localecombinations) field in AlexaClientSDKConfig.json. This field can't be empty. If you don't set these values, the sample app fails to run.
* Added two new system settings, [Timezone](https://developer.amazon.com/docs/alexa-voice-service/system.html#settimezone) and [Locale](https://developer.amazon.com/docs/alexa-voice-service/system.html#locales).
- Timezone: For example, you can set the `defaultTimezone` to `America/Vancouver`. If you don't set a value, `GMT` is set as the default value. If you set a new timezone, make sure that your AVS system settings and default timezone stay in sync. To handle this, use the new class `SystemTimeZoneInterface`. See [System Interface > SetTimeZone](https://developer.amazon.com/docs/alexa-voice-service/system.html#settimezone) for more information.
- Locale: For example, you can set `defaultLocale` to `en-GB`, instead of the default `en-US`.
* The [SpeechRecognizer](https://developer.amazon.com/docs/alexa-voice-service/speechrecognizer.html) interface now supports the following functionalities.
- Change wake word (`Alexa` supported for now).
- Toggle start of request tone on/off.
- Toggle End of request tone on/off.
* Deprecated the [CapabilityAgents](https://alexa.github.io/avs-device-sdk/classalexa_client_s_d_k_1_1avs_common_1_1avs_1_1_capability_agent.html) `Settings{…}` library. `Settings {…}` now maps to an interface that's no longer supported. You might need to update your code to handle these changes. Read [Settings Interface](https://developer.amazon.com/docs/alexa-voice-service/per-interface-settings.html) for more details.
* Added support for three new locals: Spanish - United States (ES_US), Hindi - India (HI_IN), and Brazilian - Portuguese (PT_BR).
* Linked the atomic library to the sample app to prevent build errors on Raspberry Pi.
**Bug Fixes**
* Fixed resource leaking in [EqualizerCapabilityAgent](https://alexa.github.io/avs-device-sdk/classalexa_client_s_d_k_1_1capability_agents_1_1equalizer_1_1_equalizer_capability_agent.html) after engine shutdown.
* [Issue 1391:](https://github.com/alexa/avs-device-sdk/pull/1391) Fixed an issue where [SQLiteDeviceSettingsStorage::open](https://alexa.github.io/avs-device-sdk/classalexa_client_s_d_k_1_1settings_1_1storage_1_1_s_q_lite_device_setting_storage.html#a7733e56145916f7ff265c5c950add492) tries to acquire a mutex twice, resulting in deadlock.
* [Issue 1468:](https://github.com/alexa/avs-device-sdk/issues/1468) Fixed a bug in [AudioPlayer::cancelDirective](https://alexa.github.io/avs-device-sdk/classalexa_client_s_d_k_1_1capability_agents_1_1audio_player_1_1_audio_player.html#a2c710c16f3627790fcc3238d34da9361) that causes a crash.
* Fixed Windows install script that caused the sample app build to fail - removed pip, flask, requests, and commentjson dependencies from the mingw.sh helper script.
* Fixed issue: notifications failed to sync upon device initialization. For example, let's say you had two devices - one turned on and the other turned off. After clearing the notification on the first device, it still showed up on the second device after turning it on.
* Fixed issue: barging in on a reminder caused it to stick in an inconsistent state, blocking subsequent reminders. For example, if a reminder was going off and you interrupted it, the reminder would get persist indefinitely. You could schedule future reminders, but they wouldn't play. Saying “Alexa stop” or rebooting the device fixed the “stuck” reminder.
**Known Issues**
* Music playback history isn't displayed in the Alexa app for certain account and device types.
* When using Gnu Compiler Collection 8+ (GCC 8+), `-Wclass-memaccess` triggers warnings. You can ignore these, they don't cause the build to fail.
* Android error `libDefaultClient.so not found` might occur. Resolve this by upgrading to ADB version 1.0.40.
* If a device loses a network connection, the lost connection status isn't returned via local TTS.
* ACL encounters issues if it receives audio attachments but doesn't consume them.
* `SpeechSynthesizerState` uses `GAINING_FOCUS` and `LOSING_FOCUS` as a workaround for handling intermediate states.
* Media steamed through Bluetooth might abruptly stop. To restart playback, resume the media in the source application or toggle next/previous.
* If a connected Bluetooth device is inactive, the Alexa app might indicates that audio is playing.
* The Bluetooth agent assumes that the Bluetooth adapter is always connected to a power source. Disconnecting from a power source during operation isn't yet supported.
* When using some products, interrupted Bluetooth playback might not resume if other content is locally streamed.
* `make integration` isn't available for Android. To run Android integration tests, manually upload the test binary and input file and run ADB.
* Alexa might truncate the beginning of speech when responding to text-to-speech (TTS) user events. This only impacts Raspberry Pi devices running Android Things with HDMI output audio.
* A reminder TTS message doesn't play if the sample app restarts and loses a network connection. Instead, the default alarm tone plays twice.
* `ServerDisconnectIntegratonTest` tests are disabled until they are updated to reflect new service behavior.
* Bluetooth initialization must complete before connecting devices, otherwise devices are ignored.
* The `DirectiveSequencerTest.test_handleBlockingThenImmediatelyThenNonBockingOnSameDialogId` test fails intermittently.
Changes in this update:
**Enhancements**
* AudioPlayer can now pre-buffer audio tracks in the Pre-Handle stage.
**Bug Fixes**
* Fixed an issue in the SQLite wrapper code where a `SQLiteStatement` caused a memory corruption issue.
* Fixed a race condition in SpeechSynthesizer that caused crashes.
* Fixed a `cmake` issue that specifies a dependency for Bluetooth incorrectly.
* Fixed a bug that caused Bluetooth playback to start automatically.
* Changed `supportedOperations` from a vector to a set in `ExternalMediaAdapterInterface`.
* Corrected an issue where a `VolumeChanged` event had previously been sent when the volume was unchanged after `setVolume` or `adjustVolume` had been called locally.
* Fixed issue with `IterativePlaylistParser` that prevented live stations on TuneIn from playing on Android.
* Corrected the spelling of "UNINITIALIZED".
**Known Issues**
* Music playback history isn't being displayed in the Alexa app for certain account and device types.
* On GCC 8+, issues related to `-Wclass-memaccess` will trigger warnings. However, this won't cause the build to fail and these warnings can be ignored.
* Android error ("libDefaultClient.so" not found) can be resolved by upgrading to ADB version 1.0.40
* When network connection is lost, lost connection status is not returned via local TTS.
* `ACL` may encounter issues if audio attachments are received but not consumed.
* `SpeechSynthesizerState` currently uses `GAINING_FOCUS` and `LOSING_FOCUS` as a workaround for handling intermediate state. These states may be removed in a future release.
* The Alexa app doesn't always indicate when a device is successfully connected via Bluetooth.
* Connecting a product to streaming media via Bluetooth will sometimes stop media playback within the source application. Resuming playback through the source application or toggling next/previous will correct playback.
* When a source device is streaming silence via Bluetooth, the Alexa app indicates that audio content is streaming.
* The Bluetooth agent assumes that the Bluetooth adapter is always connected to a power source. Disconnecting from a power source during operation is not yet supported.
* On some products, interrupted Bluetooth playback may not resume if other content is locally streamed.
* `make integration` is currently not available for Android. In order to run integration tests on Android, you'll need to manually upload the test binary file along with any input file. At that point, the adb can be used to run the integration tests.
* On Raspberry Pi running Android Things with HDMI output audio, beginning of speech is truncated when Alexa responds to user text-to-speech (TTS).
* When the sample app is restarted and the network connection is lost, the Reminder TTS message does not play. Instead, the default alarm tone will play twice.
* `ServerDisconnectIntegratonTest` tests have been disabled until they can be updated to reflect new service behavior.
* Devices connected before the Bluetooth CA is initialized are ignored.
* The `DirectiveSequencerTest.test_handleBlockingThenImmediatelyThenNonBockingOnSameDialogId` test fails intermittently.
Changes in this update:
**Enhancements**
* New optional configuration for [EqualizerController](https://github.com/alexa/avs-device-sdk/blob/v1.10.0/Integration/AlexaClientSDKConfig.json#L154). The EqualizerController interface allows you to adjust equalizer settings on your product, such as decibel (dB) levels and modes.
* Added reference implementation of the EqualizerController for GStreamer-based (MacOS, Linux, and Raspberry Pi) and OpenSL ES-based (Android) MediaPlayers. Note: In order to use with Android, it must support OpenSL ES.
* New optional configuration for the [TemplateRuntime display card value](https://github.com/alexa/avs-device-sdk/blob/v1.10.0/Integration/AlexaClientSDKConfig.json#L144).
* A configuration file generator script, `genConfig.sh` is now included with the SDK in the **tools/Install** directory. `genConfig.sh` and it's associated arguments populate `AlexaClientSDKConfig.json` with the data required to authorize with LWA.
* Added Bluetooth A2DP source and AVRCP target support for Linux.
* Added Amazon for Business (A4B) support, which includes support for handling the new [RevokeAuthorization](https://developer.amazon.com/docs/alexa-voice-service/system.html#revokeauth) directive in the Settings interface. A new CMake option has been added to enable A4B within the SDK, `-DA4B`.
* Added locale support for IT and ES.
* The Alexa Communication Library (ACL), `CBLAUthDelegate`, and sample app have been enhanced to detect de-authorization using the new `z` command.
* Added `ExternalMediaPlayerObserver`, which receives notification of player state, track, and username changes.
* `HTTP2ConnectionInterface` was factored out of `HTTP2Transport` to enable unit testing of `HTTP2Transport` and re-use of `HTTP2Connection` logic.
**Bug Fixes**
* Fixed a bug in which `ExternalMediaPlayer` adapter playback wasn't being recognized by AVS.
* [Issue 973](https://github.com/alexa/avs-device-sdk/issues/973) - Fixed issues related to `AudioPlayer` where progress reports were being sent out of order or with incorrect offsets.
* An `EXPECTING`, state has been added to `DialogUXState` in order to handle `EXPECT_SPEECH` state for hold-to-talk devices.
* [Issue 948](https://github.com/alexa/avs-device-sdk/issues/948) - Fixed a bug in which the sample app was stuck in a listening state.
* Fixed a bug where there was a delay between receiving a `DeleteAlert` directive, and deleting the alert.
* [Issue 839](https://github.com/alexa/avs-device-sdk/issues/839) - Fixed an issue where speech was being truncated due to the `DialogUXStateAggregator` transitioning between a `THINKING` and `IDLE` state.
* Fixed a bug in which the `AudioPlayer` attempted to play when it wasn't in the `FOREGROUND` focus.
* `CapabilitiesDelegateTest` now works on Android.
* [Issue 950](https://github.com/alexa/avs-device-sdk/issues/950) - Improved Android Media Player audio quality.
* [Issue 908](https://github.com/alexa/avs-device-sdk/issues/908) - Fixed compile error on g++ 7.x in which includes were missing.
Changes in this update:
**Enhancements**
* Added support for adjustment of alert volume.
* Added support for deletion of multiple alerts.
* The following `SpeakerInterface::Type` enumeration values have changed:
* `AVS_SYNCED` is now `AVS_SPEAKER_VOLUME`.
* `LOCAL` is now `AVS_ALERTS_VOLUME`.
**Known Issues**
* The `ACL` may encounter issues if audio attachments are received but not consumed.
* `SpeechSynthesizerState` currently uses `GAINING_FOCUS` and `LOSING_FOCUS` as a workaround for handling intermediate state. These states may be removed in a future release.
* The Alexa app doesn't always indicate when a device is successfully connected via Bluetooth.
* Connecting a product to streaming media via Bluetooth will sometimes stop media playback within the source application. Resuming playback through the source application or toggling next/previous will correct playback.
* When a source device is streaming silence via Bluetooth, the Alexa companion app indicates that audio content is streaming.
* The Bluetooth agent assumes that the Bluetooth adapter is always connected to a power source. Disconnecting from a power source during operation is not yet supported.
* On some products, interrupted Bluetooth playback may not resume if other content is locally streamed.
* On Raspberry Pi, when streaming audio via Bluetooth, sometimes the
audio stream stutters.
Changes in this update:
Enhancements
* Added the Bluetooth interface, which manages the Bluetooth connection between Alexa-enabled products and peer devices. This release supports A2DP-SINK and AVRCP profiles. Note: Bluetooth is optional and is currently limited to Raspberry Pi and Linux platforms.
* Added new Bluetooth dependencies for Linux and Raspberry Pi.
* Device Capability Framework (DCF) renamed to Capabilities.
* Updated the non-CBL client ID error message to be more specific.
* Updated the sample app to enter a limited interaction mode after an unrecoverable error.
Bug Fixes
* Issue 597 - Fixed a bug where the sample app did not respond to locale change settings.
* Fixed issue where GStreamer 1.14 MediaPlayerTest failed on Windows.
* Fixed an issue where a segmentation fault was triggered after unrecoverable error handling.
Known Issues
* The ACL may encounter issues if audio attachments are received but not consumed.
* SpeechSynthesizerState currently uses GAINING_FOCUS and LOSING_FOCUS as a workaround for handling intermediate state. These states may be removed in a future release.
* The Alexa app doesn't always indicate when a device is successfully connected via Bluetooth.
* Connecting a product to streaming media via Bluetooth will sometimes stop media playback within the source application. Resuming playback through the source application or toggling next/previous will correct playback.
* When streaming silence via Bluetooth, the Alexa companion app will sometimes indicate that media content is streaming.
* The Bluetooth agent assumes that the Bluetooth adapter is always connected to a power source. Disconnecting from a power source during operation is not yet supported.
* On some products, interrupted Bluetooth playback may not resume if other content is locally streamed.
* When streaming content via Bluetooth, under certain conditions playback will fail to resume and the sample app hangs on exit. This is due to a conflict between the GStreamer pipeline and the Bluetooth agent.
* On Raspberry Pi, when streaming audio via Bluetooth, sometimes the audio stream stutters.
* On Raspberry Pi, BlueALSA must be terminated each time the device boots. See Raspberry Pi Quick Start Guide for more information.
Changes in this update:
**Enhancements**
* `AuthDelegate` and `AuthServer.py` have been replaced by `CBLAUthDelegate`, which provides a more straightforward path to authorization.
* Added a new configuration property called [`cblAuthDelegate`](https://github.com/alexa/avs-device-sdk/blob/master/Integration/AlexaClientSDKConfig.json#L2). This object specifies parameters for `CBLAuthDelegate`.
* Added a new configuration property called [`miscDatabase`](https://github.com/alexa/avs-device-sdk/blob/master/Integration/AlexaClientSDKConfig.json#L34), which is a generic key/value database to be used by various components.
* Added a new configuration property called [`dcfDelegate`](https://github.com/alexa/avs-device-sdk/blob/master/Integration/AlexaClientSDKConfig.json#L17) This object specifies parameters for `DCFDelegate`. Within this object, values were added for the 'endpoint' and `overridenDcfPublishMessageBody`. 'endpoint' is the endpoint to connect to in order to send device capabilities. `overridenDcfPublishMessageBody`is the message that will get sent out to the Capabilities API. Note: values within the `dcfDelegate` object will only work in `DEBUG` builds.
* Added a new configuration property called [`deviceInfo`](https://github.com/alexa/avs-device-sdk/blob/master/Integration/AlexaClientSDKConfig.json#L9) which specifies device-identifying information for use by the Device Capability Framework (DCF), and for authorization (CBLAuthDelegate).
* Updated the Directive Sequencer to support wildcard directive handlers. This allows a handler for a given AVS interface to register at the namespace level, rather than specifying the names of all directives within that namespace.
* Updated the Raspberry Pi installation script to include `alsasink` in the configuration file.
* Added `audioSink` as a configuration option. This allows users to override the audio sink element used in `Gstreamer`.
* Added an interface for monitoring internet connection status: `InternetConnectionMonitorInterface.h`.
* The Alexa Communications Library (ACL) is no longer required to wait until authorization has succeeded before attempting to connect to AVS. Instead, `HTTP2Transport` handles waiting for authorization to complete.
* Added the Device Capabilities Framework (DCF) delegate. Device capabilities can now be sent for each capability interface using DCF publish messages.
* The sample app has been updated to send DCF publish messages, which will automatically occur when the sample app starts. Note: a DCF publish message must be successfully sent in order for communication with AVS to occur.
* The SDK now supports HTTP PUT messages.
* Added support for opt-arg style arguments and multiple configuration files. Now, the sample app can be invoked by either of these commands: `SampleApp <configfile> <debuglevel>` OR `SampleApp -C file1 -C file2 ... -L loglevel`.
**Bug Fixes**
* Issues [447](https://github.com/alexa/avs-device-sdk/issues/447) and [553](https://github.com/alexa/avs-device-sdk/issues/553) Fixed the `AttachmentRenderSource`'s handling of `BLOCKING` `AttachmentReaders`.
* Updated the `Logger` implementation to be more resilient to `nullptr` string inputs.
* Fixed a `TimeUtils` utility-related compile issue.
* Fixed a bug in which alerts failed to activate if the system was restarted without network connection.
* Fixed Android 64-bit build failure issue.
**Known Issues**
* The `ACL` may encounter issues if audio attachments are received but not consumed.
* `SpeechSynthesizerState` currently uses `GAINING_FOCUS` and `LOSING_FOCUS` as a workaround for handling intermediate state. These states may be removed in a future release.
* Some ERROR messages may be printed during start-up event if initialization proceeds normally and successfully.
* If an unrecoverable authorization error or an unrecoverable DCF error is encountered, the sample app may crash on shutdown.
* If a non-CBL `clientId` is included in the `deviceInfo` section of `AlexaClientSDKConfig.json`, the error will be reported as an unrecoverable authorization error, rather than a more specific error.
Changes in this update:
**Enhancements**
* `rapidJson` is now included with "make install".
* Updated the `TemplateRuntimeObserverInterface` to support clearing of `displayCards`.
* Added Windows SDK support, along with an installation script (MinGW-w64).
* Updated `ContextManager` to ignore context reported by a state provider.
* The `SharedDataStream` object is now associated by playlist, rather than by URL.
* Added the `RegistrationManager` component. Now, when a user logs out all persistent user-specific data is cleared from the SDK. The log out functionality can be exercised in the sample app with the new command: `k`.
**Bug Fixes**
* [Issue 400](https://github.com/alexa/avs-device-sdk/issues/400) Fixed a bug where the alert reminder did not iterate as intended after loss of network connection.
* [Issue 477](https://github.com/alexa/avs-device-sdk/issues/477) Fixed a bug in which Alexa's weather response was being truncated.
* Fixed an issue in which there were reports of instability related to the Sensory engine. To correct this, the `portAudio` [`suggestedLatency`](https://github.com/alexa/avs-device-sdk/blob/master/Integration/AlexaClientSDKConfig.json#L62) value can now be configured.
**Known Issues**
* The `ACL` may encounter issues if audio attachments are received but not consumed.
* `SpeechSynthesizerState` currently uses `GAINING_FOCUS` and `LOSING_FOCUS` as a workaround for handling intermediate state. These states may be removed in a future release.
* Music playback doesn't immediately stop when a user barges-in on iHeartRadio.
* The Windows sample app sometimes hangs on exit.
* GDP receives a `SIGPIPE` when troubleshooting the Windows sample app.
Changes in this update:
**Enhancements**
* Added the `ExternalMediaPlayer` Capability Agent. This allows playback from music providers that control their own playback queue. Example: Spotify.
* Added support for AU and NZ to the `SampleApp`.
* Firmware version can now be sent to Alexa via the `SoftwareInfo` event. The firmware version is specified in the config file under the `sampleApp` object as an integer value named [`firmwareVersion`](https://github.com/alexa/avs-device-sdk/blob/master/Integration/AlexaClientSDKConfig.json#L52).
* The new `f` command was added to the `SampleApp` which allows the firmware version to be updated at run-time.
* Optional configuration changes have been introduced. Now a [default log level](https://github.com/alexa/avs-device-sdk/blob/master/Integration/AlexaClientSDKConfig.json#L93) can be set for `ACSDK_LOG_MODULE` components, globally or individually. This value is specified under a new root level configuration object called `logger`, and the value itself is named `logLevel`. This allows you to limit the degree of logging to that default value, such as `ERROR`or `INFO`.
**Bug Fixes**
* Fixed bug where `AudioPlayer` progress reports were not being sent, or were being sent incorrectly.
* [Issue 408](https://github.com/alexa/avs-device-sdk/issues/408) - Irrelevant code related to `UrlSource` was removed from the `GStreamer-based MediaPlayer` implementation.
* The `TZ` variable no longer needs to be set to `UTC` when building the `SampleApp`.
* Fixed a bug where `CurlEasyHandleWrapper` logged unwanted data on failure conditions.
* Fixed a bug to improve `SIGPIPE` handling.
* Fixed a bug where the filename and classname were mismatched. Changed `UrlToAttachmentConverter.h` to `UrlContentToAttachmentConverter.h`,and `UrlToAttachmentConverter.cpp` to `UrlContentToAttachmentConverter.cpp`
**Known Issues**
* The `ACL` may encounter issues if audio attachments are received but not consumed.
* Display Cards for Kindle don't render.
* If using the GStreamer-based `MediaPlayer` implementation, after muting and un-muting an audio item, the next item in the queue will begin playing rather than continuing playback of the originally muted audio item.
* `SpeechSynthesizerState` currently uses `GAINING_FOCUS` and `LOSING_FOCUS` as a workaround for handling intermediate state. These states may be removed in a future release.
* Music playback doesn't immediately stop when a user barges-in on iHeartRadio.
Changes in this update:
**Enhancements**
* Added the Notifications Capability Agent. This allows a client to receive notification indicators from Alexa.
* Added support for the `SoftwareInfo` event. This code is triggered in the `SampleApp` by providing a positive decimal integer as the "firmwareVersion" value in "sampleApp" object of the `AlexaClientSDKConfig.json`. The reported firmware version can be updated after starting the `SampleApp` by calling `SoftwareInfoSender::setFirmwareVersion()`. This code path can be exercised in the `SampleApp` with the new command: `f`.
* Added unit tests for Alerts.
* The GStreamer-based pipeline allows for the configuration of `MediaPlayer` output based on information provided in `Config`.
* Playlist streaming now uses a `BLOCKING` writer, which improves streaming efficiency.
**Bug Fixes**
* Fixed bug where `SpeechSynthesizer` would not stop playback when a state change timeout was encountered.
* Fixed the `SampleApplication` destructor to avoid segfaults if the object is not constructed correctly.
* Fixed bug where `AudioPlayer` would erroneously call `executeStop()` in `cancelDirective()`.
* [Issue 396](https://github.com/alexa/avs-device-sdk/issues/396) - Fixed bug for compilation error with GCC7 in `AVSCommon/SDKInterfaces/include/AVSCommon/SDKInterfaces/Audio/AlertsAudioFactoryInterface.h`
* [Issue 384](https://github.com/alexa/avs-device-sdk/issues/384) - Fixed bug that caused `AuthServer.py` to crash.
* Fixed bug where a long delay was encountered after pausing and resuming a large Audible chapter.
* Fixed bug that caused named timers and reminders to loop for an additional `loopCount` .
* Fixed memory corruption bug in `MessageInterpreter`.
* Fixed illegal memory accesses in `MediaPlayer` logging.
**Known Issues**
* The `ACL` may encounter issues if audio attachments are received but not consumed.
* Display Cards for Kindle don't render.
* If using the GStreamer-based `MediaPlayer` implementation, after muting and un-muting an audio item, the next item in the queue will begin playing rather than continuing playback of the originally muted audio item.
* `SpeechSynthesizerState` currently uses `GAINING_FOCUS` and `LOSING_FOCUS` as a workaround for handling intermediate state. These states may be removed in a future release.
* Music playback doesn't immediately stop when a user barges-in on iHeartRadio.
**Enhancements**
* ContextManager now passes the namespace/name of the desired state to StateProv
iderInterface::provideState(). This is helpful when a single StateProvider obje
ct provides multiple states, and needs to know which one ContextManager is askin
g for.
* The mime parser was hardened against duplicate boundaries.
* Added functionality to add and remove AudioPlayer observers to the DefaultClie
nt.
* Unit tests for Alerts were added.
* Added en-IN, en-CA and ja-JP to the SampleApp locale selection menu.
* Added default alert and timer audio data to the SDK SampleApp. There is no lo
nger a requirement to download these audio files and configure them in the json
configuration file.
* Added support in SDS Reader and AttachmentReader for seeking into the future.
This allows a reader to move to an index which has not yet arrived in the SDS a
nd poll/block until it arrives.
* Added support for blocking Writers in the SharedDataStream class.
* Changed the default status code sent by MessageRequestObserverInterface::onSen
dCompleted() to SERVER_OTHER_ERROR, and mapped HTTP code 500 to SERVER_INTERNAL_
ERROR_V2.
* Added support for parsing stream duration out of playlists.
* Added a configuration option ("sampleApp":"displayCardsSupported") that allows
the displaying of display cards to be enabled or disabled.
* Named Timers and Reminders have been updated to fall back to the on-device bac
kground audio sound when cloud urls cannot be accessed or rendered.
**Bug Fixes**
* Removed floating point dependencies from core SDK libraries.
* Fixed bug in SpeechSynthesizer where it's erroneously calling stop more than once.
* Fixed an issue in ContentFetcher where it could hang during destruction until an active GET request completed.
* Fixed a couple of parsing bugs in LibCurlHttpContentFetcher related to case-sensitivity and mime-type handling.
* Fixed a bug where MediaPlayerObserverInterface::onPlaybackResumed() wasn't being called after resuming from a pause with a pending play/resume.
* Fixed a bug in LibCurlContentFetcher where it could error out if data is written to the SDS faster than it is consumed.
* The GStreamer-based MediaPlayer reference implementation now uses the ACL HTTP configured client.
* An API change has been made to MediaPlayerInterface::setSource(). This method now takes in an optional offset as well to allow for immediately streaming to the offset if possible.
* Next and Previous buttons now work with Audible.
* Pandora resume stuttering is addressed.
* Pausing and resuming Amazon music no longer seeks back to the beginning of the song.
* libcurl CURLOPT_NOSIGNAL option is set to 1 (https://curl.haxx.se/libcurl/c/CURLOPT_NOSIGNAL.html) to avoid crashes observed in SampleApp.
* Fixed the timing of the PlaybackReportIntervalEvent and PlaybackReportDelayEvent as specified in the directives.
* Fixed potential deadlocks in MediaPlayer during shutdown related to queued callbacks.
* Fixed a crash in MediaPlayer that could occur if the network is disconnected during playback.
* Fixed a bug where music could keep playing while Alexa is speaking.
* Fixed a bug which was causing problems with pause/resume and next/previous with Amazon Music.
* Fixed a bug where music could briefly start playing between speaks.
* Fixed a bug where HLS playlists would stop streaming after the initial playlist had been played to completion.
* Fixed a bug where Audible playback could not advance to the next chapter.
* Fixed some occurrences of SDK entering the IDLE state during the transition between Listening and Speaking states.
* Fixed a bug where PlaybackFinished events were not reporting the correct offset.
* An API change has been made to MediaPlayerInterface::getOffset(). This method is now required to return the final offset when called after playback has stopped.
* Fixed a problem where AIP was erroneously resetting its state upon getting a cancelDirective() callback.
**Known Issues**
* Capability agent for Notifications is not included in this release.
* `ACL`'s asynchronous receipt of audio attachments may manage resources poorly in scenarios where attachments are received but not consumed.
* GUI cards don't show for Kindle.
* The new SpeechSynthesizerState state values GAINING_FOCUS and LOSING_FOCUS were added as part of a work-around. The will likely be removed in subsequent releases.
* With the gstreamer-based MediaPlayer, after muting and unmuting, the next item starts playing rather than continuing with the current item.
- Changes in this update:
- Better GStreamer error reporting. MediaPlayer used to only report `MEDIA_ERROR_UNKNOWN`, now reports more specific errors as defined in `ErrorType.h`.
- Codebase has been formatted for easier reading.
- `DirectiveRouter::removeDirectiveHandler()` signature changed and now returns a bool indicating if given handler should be successfully removed or not.
- Cleanup of raw and shared pointers in the creation of `Transport` objects.
- `HTTP2Stream`s now have IDs assigned as they are acquired as opposed to created, making associated logs easier to interpret.
- `AlertsCapabilityAgent` has been refactored.
- Alert management has been factored out into an `AlertScheduler` class.
- Creation of Reminder (implements Alert) class.
- Added new capability agent for `PlaybackController` with unit tests.
- Added Settings interface with unit tests.
- Return type of `getOffsetInMilliseconds()` changed from `int64_t` to `std::chronology::milliseconds`.
- Added `AudioPlayer` unit tests.
- Added teardown for all Integration tests except Alerts.
- Implemented PlaylistParser.
- Bug fixes:
- AIP getting stuck in `LISTENING` or `THINKING` and refusing user input on network outage.
- SampleApp crashing if running for 5 minutes after network disconnect.
- Issue where on repeated user barge-ins, `AudioPlayer` would not pause. Specifically, the third attempt to “Play iHeartRadio” would not result in currently-playing music pausing.
- Utterances being ignored after particularly long TTS.
- GStreamer errors cropping up on SampleApp exit as a result of accessing the pipeline before it’s been setup.
- Crashing when playing one URL after another.
- Buffer overrun in Alerts Renderer.
- [SampleApp crashing when issuing "Alexa skip" command with iHeartRadio.](https://github.com/alexa/avs-device-sdk/issues/153)
- [`HTTP2Transport` network thread triggering a join on itself.](https://github.com/alexa/avs-device-sdk/issues/127)
- [`HTTP2Stream` request handling truncating exception messages.](https://github.com/alexa/avs-device-sdk/issues/67)
- [`AudioPlayer` was attempting an incorrect state transition from `STOPPED` to `PLAYING` through a `playbackResumed`.](https://github.com/alexa/avs-device-sdk/issues/138)
Caleigh Minshall
Scott Heath
Michael Woo
Sam Coulter
Kenneth Chan
Mahesh Velegonda
David Henry
Keith Huang
Federico Rozenberg
Marco Visaya
Sanjay Devireddy
Celina G. Val
Ken Cecka