Audio: Copy HAL V6 into V7
This is an automated copy performed using copyHAL.sh script.
Bug: 142480271
Test: m
Change-Id: Ifd91cc0bb59608cd92d1d8e4e76c3abea0a8da5e
Merged-In: Ifd91cc0bb59608cd92d1d8e4e76c3abea0a8da5e
diff --git a/audio/7.0/IStreamOutEventCallback.hal b/audio/7.0/IStreamOutEventCallback.hal
new file mode 100644
index 0000000..52e65d3
--- /dev/null
+++ b/audio/7.0/IStreamOutEventCallback.hal
@@ -0,0 +1,140 @@
+/*
+ * 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;
+
+/**
+ * Asynchronous stream out event callback interface. The interface provides
+ * a way for the HAL to notify platform when there are changes, e.g. codec
+ * format change, from the lower layer.
+ */
+interface IStreamOutEventCallback {
+ /**
+ * Codec format changed.
+ *
+ * onCodecFormatChanged returns an AudioMetadata object in read-only ByteString format.
+ * It represents the most recent codec format decoded by a HW audio decoder.
+ *
+ * Codec format is an optional message from HW audio decoders. It serves to
+ * notify the application about the codec format and audio objects contained
+ * within the compressed audio stream for control, informational,
+ * and display purposes.
+ *
+ * audioMetadata ByteString is convertible to an AudioMetadata object through
+ * both a C++ and a C API present in Metadata.h [1], or through a Java API present
+ * in AudioMetadata.java [2].
+ *
+ * The ByteString format is a stable format used for parcelling (marshalling) across
+ * JNI, AIDL, and HIDL interfaces. The test for R compatibility for native marshalling
+ * is TEST(metadata_tests, compatibility_R) [3]. The test for R compatibility for JNI
+ * marshalling is android.media.cts.AudioMetadataTest#testCompatibilityR [4].
+ *
+ * R (audio HAL 7.0) defined keys are as follows [2]:
+ * "bitrate", int32
+ * "channel-mask", int32
+ * "mime", string
+ * "sample-rate", int32
+ * "bit-width", int32
+ * "has-atmos", int32
+ * "audio-encoding", int32
+ *
+ * Parceling Format:
+ * All values are native endian order. [1]
+ *
+ * using type_size_t = uint32_t;
+ * using index_size_t = uint32_t;
+ * using datum_size_t = uint32_t;
+ *
+ * Permitted type indexes are
+ * TYPE_NONE = 0, // Reserved
+ * TYPE_INT32 = 1,
+ * TYPE_INT64 = 2,
+ * TYPE_FLOAT = 3,
+ * TYPE_DOUBLE = 4,
+ * TYPE_STRING = 5,
+ * TYPE_DATA = 6, // A data table of <String, Datum>
+ *
+ * Datum = {
+ * (type_size_t) Type (the type index from type_as_value<T>.)
+ * (datum_size_t) Size (size of the Payload)
+ * (byte string) Payload<Type>
+ * }
+ *
+ * The data is specified in native endian order.
+ * Since the size of the Payload is always present, unknown types may be skipped.
+ *
+ * Payload<Fixed-size Primitive_Value>
+ * [ sizeof(Primitive_Value) in raw bytes ]
+ *
+ * Example of Payload<Int32> of 123:
+ * Payload<Int32>
+ * [ value of 123 ] = 0x7b 0x00 0x00 0x00 123
+ *
+ * Payload<String>
+ * [ (index_size_t) length, not including zero terminator.]
+ * [ (length) raw bytes ]
+ *
+ * Example of Payload<String> of std::string("hi"):
+ * [ (index_size_t) length ] = 0x02 0x00 0x00 0x00 2 strlen("hi")
+ * [ raw bytes "hi" ] = 0x68 0x69 "hi"
+ *
+ * Payload<Data>
+ * [ (index_size_t) entries ]
+ * [ raw bytes (entry 1) Key (Payload<String>)
+ * Value (Datum)
+ * ... (until #entries) ]
+ *
+ * Example of Payload<Data> of {{"hello", "world"},
+ * {"value", (int32_t)1000}};
+ * [ (index_size_t) #entries ] = 0x02 0x00 0x00 0x00 2 entries
+ * Key (Payload<String>)
+ * [ index_size_t length ] = 0x05 0x00 0x00 0x00 5 strlen("hello")
+ * [ raw bytes "hello" ] = 0x68 0x65 0x6c 0x6c 0x6f "hello"
+ * Value (Datum)
+ * [ (type_size_t) type ] = 0x05 0x00 0x00 0x00 5 (TYPE_STRING)
+ * [ (datum_size_t) size ] = 0x09 0x00 0x00 0x00 sizeof(index_size_t) +
+ * strlen("world")
+ * Payload<String>
+ * [ (index_size_t) length ] = 0x05 0x00 0x00 0x00 5 strlen("world")
+ * [ raw bytes "world" ] = 0x77 0x6f 0x72 0x6c 0x64 "world"
+ * Key (Payload<String>)
+ * [ index_size_t length ] = 0x05 0x00 0x00 0x00 5 strlen("value")
+ * [ raw bytes "value" ] = 0x76 0x61 0x6c 0x75 0x65 "value"
+ * Value (Datum)
+ * [ (type_size_t) type ] = 0x01 0x00 0x00 0x00 1 (TYPE_INT32)
+ * [ (datum_size_t) size ] = 0x04 0x00 0x00 0x00 4 sizeof(int32_t)
+ * Payload<Int32>
+ * [ raw bytes 1000 ] = 0xe8 0x03 0x00 0x00 1000
+ *
+ * The contents of audioMetadata is a Payload<Data>.
+ * An implementation dependent detail is that the Keys are always
+ * stored sorted, so the byte string representation generated is unique.
+ *
+ * Vendor keys are allowed for informational and debugging purposes.
+ * Vendor keys should consist of the vendor company name followed
+ * by a dot; for example, "vendorCompany.someVolume" [2].
+ *
+ * [1] system/media/audio_utils/include/audio_utils/Metadata.h
+ * [2] frameworks/base/media/java/android/media/AudioMetadata.java
+ * [3] system/media/audio_utils/tests/metadata_tests.cpp
+ * [4] cts/tests/tests/media/src/android/media/cts/AudioMetadataTest.java
+ *
+ * @param audioMetadata is a buffer containing decoded format changes
+ * reported by codec. The buffer contains data that can be transformed
+ * to audio metadata, which is a C++ object based map.
+ */
+ oneway onCodecFormatChanged(vec<uint8_t> audioMetadata);
+};