Audio: Copy HAL V6 into V7
This is an automated copy performed using copyHAL.sh script.
Bug: 142480271
Test: m
Change-Id: Ifd91cc0bb59608cd92d1d8e4e76c3abea0a8da5e
diff --git a/audio/7.0/IStreamOut.hal b/audio/7.0/IStreamOut.hal
new file mode 100644
index 0000000..208beb6
--- /dev/null
+++ b/audio/7.0/IStreamOut.hal
@@ -0,0 +1,378 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.audio@7.0;
+
+import android.hardware.audio.common@7.0;
+import IStream;
+import IStreamOutCallback;
+import IStreamOutEventCallback;
+
+interface IStreamOut extends IStream {
+ /**
+ * Return the audio hardware driver estimated latency in milliseconds.
+ *
+ * @return latencyMs latency in milliseconds.
+ */
+ getLatency() generates (uint32_t latencyMs);
+
+ /**
+ * This method is used in situations where audio mixing is done in the
+ * hardware. This method serves as a direct interface with hardware,
+ * allowing to directly set the volume as apposed to via the framework.
+ * This method might produce multiple PCM outputs or hardware accelerated
+ * codecs, such as MP3 or AAC.
+ * Optional method
+ *
+ * @param left left channel attenuation, 1.0f is unity, 0.0f is zero.
+ * @param right right channel attenuation, 1.0f is unity, 0.0f is zero.
+ * @return retval operation completion status.
+ * If a volume is outside [0,1], return INVALID_ARGUMENTS
+ */
+ setVolume(float left, float right) generates (Result retval);
+
+ /**
+ * Commands that can be executed on the driver writer thread.
+ */
+ enum WriteCommand : int32_t {
+ WRITE,
+ GET_PRESENTATION_POSITION,
+ GET_LATENCY
+ };
+
+ /**
+ * Data structure passed back to the client via status message queue
+ * of 'write' operation.
+ *
+ * Possible values of 'retval' field:
+ * - OK, write operation was successful;
+ * - INVALID_ARGUMENTS, stream was not configured properly;
+ * - INVALID_STATE, stream is in a state that doesn't allow writes;
+ * - INVALID_OPERATION, retrieving presentation position isn't supported.
+ */
+ struct WriteStatus {
+ Result retval;
+ WriteCommand replyTo; // discriminator
+ union Reply {
+ uint64_t written; // WRITE command, amount of bytes written, >= 0.
+ struct PresentationPosition { // same as generated by
+ uint64_t frames; // getPresentationPosition.
+ TimeSpec timeStamp;
+ } presentationPosition;
+ uint32_t latencyMs; // Same as generated by getLatency.
+ } reply;
+ };
+
+ /**
+ * Called when the metadata of the stream's source has been changed.
+ * @param sourceMetadata Description of the audio that is played by the clients.
+ */
+ updateSourceMetadata(SourceMetadata sourceMetadata);
+
+ /**
+ * Set up required transports for passing audio buffers to the driver.
+ *
+ * The transport consists of three message queues:
+ * -- command queue is used to instruct the writer thread what operation
+ * to perform;
+ * -- data queue is used for passing audio data from the client
+ * to the driver;
+ * -- status queue is used for reporting operation status
+ * (e.g. amount of bytes actually written or error code).
+ *
+ * The driver operates on a dedicated thread. The client must ensure that
+ * the thread is given an appropriate priority and assigned to correct
+ * scheduler and cgroup. For this purpose, the method returns identifiers
+ * of the driver thread.
+ *
+ * @param frameSize the size of a single frame, in bytes.
+ * @param framesCount the number of frames in a buffer.
+ * @return retval OK if both message queues were created successfully.
+ * INVALID_STATE if the method was already called.
+ * INVALID_ARGUMENTS if there was a problem setting up
+ * the queues.
+ * @return commandMQ a message queue used for passing commands.
+ * @return dataMQ a message queue used for passing audio data in the format
+ * specified at the stream opening.
+ * @return statusMQ a message queue used for passing status from the driver
+ * using WriteStatus structures.
+ * @return threadInfo identifiers of the driver's dedicated thread.
+ */
+ prepareForWriting(uint32_t frameSize, uint32_t framesCount)
+ generates (
+ Result retval,
+ fmq_sync<WriteCommand> commandMQ,
+ fmq_sync<uint8_t> dataMQ,
+ fmq_sync<WriteStatus> statusMQ,
+ ThreadInfo threadInfo);
+
+ /**
+ * Return the number of audio frames written by the audio DSP to DAC since
+ * the output has exited standby.
+ * Optional method
+ *
+ * @return retval operation completion status.
+ * @return dspFrames number of audio frames written.
+ */
+ getRenderPosition() generates (Result retval, uint32_t dspFrames);
+
+ /**
+ * Get the local time at which the next write to the audio driver will be
+ * presented. The units are microseconds, where the epoch is decided by the
+ * local audio HAL.
+ * Optional method
+ *
+ * @return retval operation completion status.
+ * @return timestampUs time of the next write.
+ */
+ getNextWriteTimestamp() generates (Result retval, int64_t timestampUs);
+
+ /**
+ * Set the callback interface for notifying completion of non-blocking
+ * write and drain.
+ *
+ * Calling this function implies that all future 'write' and 'drain'
+ * must be non-blocking and use the callback to signal completion.
+ *
+ * 'clearCallback' method needs to be called in order to release the local
+ * callback proxy on the server side and thus dereference the callback
+ * implementation on the client side.
+ *
+ * @return retval operation completion status.
+ */
+ setCallback(IStreamOutCallback callback) generates (Result retval);
+
+ /**
+ * Clears the callback previously set via 'setCallback' method.
+ *
+ * Warning: failure to call this method results in callback implementation
+ * on the client side being held until the HAL server termination.
+ *
+ * If no callback was previously set, the method should be a no-op
+ * and return OK.
+ *
+ * @return retval operation completion status: OK or NOT_SUPPORTED.
+ */
+ clearCallback() generates (Result retval);
+
+ /**
+ * Set the callback interface for notifying about an output stream event.
+ *
+ * Calling this method with a null pointer will result in releasing
+ * the local callback proxy on the server side and thus dereference
+ * the callback implementation on the client side.
+ *
+ * @return retval operation completion status.
+ */
+ setEventCallback(IStreamOutEventCallback callback)
+ generates (Result retval);
+
+ /**
+ * Returns whether HAL supports pausing and resuming of streams.
+ *
+ * @return supportsPause true if pausing is supported.
+ * @return supportsResume true if resume is supported.
+ */
+ supportsPauseAndResume()
+ generates (bool supportsPause, bool supportsResume);
+
+ /**
+ * Notifies to the audio driver to stop playback however the queued buffers
+ * are retained by the hardware. Useful for implementing pause/resume. Empty
+ * implementation if not supported however must be implemented for hardware
+ * with non-trivial latency. In the pause state, some audio hardware may
+ * still be using power. Client code may consider calling 'suspend' after a
+ * timeout to prevent that excess power usage.
+ *
+ * Implementation of this function is mandatory for offloaded playback.
+ *
+ * @return retval operation completion status.
+ */
+ pause() generates (Result retval);
+
+ /**
+ * Notifies to the audio driver to resume playback following a pause.
+ * Returns error INVALID_STATE if called without matching pause.
+ *
+ * Implementation of this function is mandatory for offloaded playback.
+ *
+ * @return retval operation completion status.
+ */
+ resume() generates (Result retval);
+
+ /**
+ * Returns whether HAL supports draining of streams.
+ *
+ * @return supports true if draining is supported.
+ */
+ supportsDrain() generates (bool supports);
+
+ /**
+ * Requests notification when data buffered by the driver/hardware has been
+ * played. If 'setCallback' has previously been called to enable
+ * non-blocking mode, then 'drain' must not block, instead it must return
+ * quickly and completion of the drain is notified through the callback. If
+ * 'setCallback' has not been called, then 'drain' must block until
+ * completion.
+ *
+ * If 'type' is 'ALL', the drain completes when all previously written data
+ * has been played.
+ *
+ * If 'type' is 'EARLY_NOTIFY', the drain completes shortly before all data
+ * for the current track has played to allow time for the framework to
+ * perform a gapless track switch.
+ *
+ * Drain must return immediately on 'stop' and 'flush' calls.
+ *
+ * Implementation of this function is mandatory for offloaded playback.
+ *
+ * @param type type of drain.
+ * @return retval operation completion status.
+ */
+ drain(AudioDrain type) generates (Result retval);
+
+ /**
+ * Notifies to the audio driver to flush the queued data. Stream must
+ * already be paused before calling 'flush'.
+ * Optional method
+ *
+ * Implementation of this function is mandatory for offloaded playback.
+ *
+ * @return retval operation completion status.
+ */
+ flush() generates (Result retval);
+
+ /**
+ * Return a recent count of the number of audio frames presented to an
+ * external observer. This excludes frames which have been written but are
+ * still in the pipeline. The count is not reset to zero when output enters
+ * standby. Also returns the value of CLOCK_MONOTONIC as of this
+ * presentation count. The returned count is expected to be 'recent', but
+ * does not need to be the most recent possible value. However, the
+ * associated time must correspond to whatever count is returned.
+ *
+ * Example: assume that N+M frames have been presented, where M is a 'small'
+ * number. Then it is permissible to return N instead of N+M, and the
+ * timestamp must correspond to N rather than N+M. The terms 'recent' and
+ * 'small' are not defined. They reflect the quality of the implementation.
+ *
+ * Optional method
+ *
+ * @return retval operation completion status.
+ * @return frames count of presented audio frames.
+ * @return timeStamp associated clock time.
+ */
+ getPresentationPosition()
+ generates (Result retval, uint64_t frames, TimeSpec timeStamp);
+
+ /**
+ * Selects a presentation for decoding from a next generation media stream
+ * (as defined per ETSI TS 103 190-2) and a program within the presentation.
+ * Optional method
+ *
+ * @param presentationId selected audio presentation.
+ * @param programId refinement for the presentation.
+ * @return retval operation completion status.
+ */
+ selectPresentation(int32_t presentationId, int32_t programId)
+ generates (Result retval);
+
+ /**
+ * Returns the Dual Mono mode presentation setting.
+ *
+ * Optional method
+ *
+ * @return retval operation completion status.
+ * @return mode current setting of Dual Mono mode.
+ */
+ getDualMonoMode() generates (Result retval, DualMonoMode mode);
+
+ /**
+ * Sets the Dual Mono mode presentation on the output device.
+ *
+ * The Dual Mono mode is generally applied to stereo audio streams
+ * where the left and right channels come from separate sources.
+ *
+ * Optional method
+ *
+ * @param mode selected Dual Mono mode.
+ * @return retval operation completion status.
+ */
+ setDualMonoMode(DualMonoMode mode) generates (Result retval);
+
+ /**
+ * Returns the Audio Description Mix level in dB.
+ *
+ * The level is applied to streams incorporating a secondary Audio
+ * Description stream. It specifies the relative level of mixing for
+ * the Audio Description with a reference to the Main Audio.
+ *
+ * Optional method
+ *
+ * The value of the relative level is in the range from negative infinity
+ * to +48.
+ *
+ * @return retval operation completion status.
+ * @return leveldB the current Audio Description Mix Level in dB.
+ */
+ getAudioDescriptionMixLevel() generates (Result retval, float leveldB);
+
+ /**
+ * Sets the Audio Description Mix level in dB.
+ *
+ * For streams incorporating a secondary Audio Description stream
+ * the relative level of mixing of the Audio Description to the Main Audio
+ * is controlled by this method.
+ *
+ * Optional method
+ *
+ * The value of the relative level must be in the range from negative
+ * infinity to +48.
+ *
+ * @param leveldB Audio Description Mix Level in dB
+ * @return retval operation completion status.
+ */
+ setAudioDescriptionMixLevel(float leveldB) generates (Result retval);
+
+ /**
+ * Retrieves current playback rate parameters.
+ *
+ * Optional method
+ *
+ * @return retval operation completion status.
+ * @return playbackRate current playback parameters
+ */
+ getPlaybackRateParameters()
+ generates (Result retval, PlaybackRate playbackRate);
+
+ /**
+ * Sets the playback rate parameters that control playback behavior.
+ * This is normally used when playing encoded content and decoding
+ * is performed in hardware. Otherwise, the framework can apply
+ * necessary transformations.
+ *
+ * Optional method
+ *
+ * If the HAL supports setting the playback rate, it is recommended
+ * to support speed and pitch values at least in the range
+ * from 0.5f to 2.0f, inclusive (see the definition of PlaybackRate struct).
+ *
+ * @param playbackRate playback parameters
+ * @return retval operation completion status.
+ */
+ setPlaybackRateParameters(PlaybackRate playbackRate)
+ generates (Result retval);
+};