Merge "CDD: Recommended values for AAudioStream_getFramesPerBurst()" into pi-dev
diff --git a/5_multimedia/5_6_audio-latency.md b/5_multimedia/5_6_audio-latency.md
index 81c236a..5e0699d 100644
--- a/5_multimedia/5_6_audio-latency.md
+++ b/5_multimedia/5_6_audio-latency.md
@@ -46,10 +46,10 @@
If device implementations declare `android.hardware.audio.output` they are
STRONGLY RECOMMENDED to meet or exceed the following requirements:
-* [SR] Cold output latency of 100 milliseconds or less
-* [SR] Continuous output latency of 45 milliseconds or less
-* [SR] Minimize the cold output jitter
-* [SR] The output timestamp returned by
+* [C-SR] Cold output latency of 100 milliseconds or less
+* [C-SR] Continuous output latency of 45 milliseconds or less
+* [C-SR] Minimize the cold output jitter
+* [C-SR] The output timestamp returned by
[AudioTrack.getTimestamp](https://developer.android.com/reference/android/media/AudioTrack.html#getTimestamp(android.media.AudioTimestamp))
and `AAudioStream_getTimestamp` is accurate to +/- 1 ms.
@@ -58,10 +58,16 @@
for continuous output latency and cold output latency over at least one supported audio
output device, they are:
-* [SR] STRONGLY RECOMMENDED to report low latency audio by declaring
-`android.hardware.audio.low_latency` feature flag.
-* [SR] STRONGLY RECOMMENDED to also meet the requirements for low-latency
+* [C-SR] STRONGLY RECOMMENDED to report low-latency audio by declaring
+ `android.hardware.audio.low_latency` feature flag.
+* [C-SR] STRONGLY RECOMMENDED to meet the requirements for low-latency
audio via the AAudio API.
+* [C-SR] STRONGLY RECOMMENDED to ensure that for streams that return
+ [`AAUDIO_PERFORMANCE_MODE_LOW_LATENCY`](https://developer.android.com/ndk/guides/audio/aaudio/aaudio#performance-mode)
+ from [`AAudioStream_getPerformanceMode()`](https://developer.android.com/ndk/reference/group/audio#aaudiostream_getperformancemode),
+ the value returned by [`AAudioStream_getFramesPerBurst()`](https://developer.android.com/ndk/reference/group/audio#aaudiostream_getframesperburst)
+ is less than or equal to the value returned by [`android.media.AudioManager.getProperty(String)`](https://developer.android.com/reference/android/media/AudioManager.html#getProperty%28java.lang.String%29)
+ for property key [`AudioManager.PROPERTY_OUTPUT_FRAMES_PER_BUFFER`](https://developer.android.com/reference/android/media/AudioManager.html#PROPERTY_OUTPUT_FRAMES_PER_BUFFER).
If device implementations do not meet the requirements for low-latency audio
via both the OpenSL ES PCM buffer queue and AAudio native audio APIs, they:
@@ -71,10 +77,10 @@
If device implementations include `android.hardware.microphone`, they are
STRONGLY RECOMMENDED to meet these input audio requirements:
- * [SR] Cold input latency of 100 milliseconds or less
- * [SR] Continuous input latency of 30 milliseconds or less
- * [SR] Continuous round-trip latency of 50 milliseconds or less
- * [SR] Minimize the cold input jitter
- * [SR] Limit the error in input timestamps, as returned by
+ * [C-SR] Cold input latency of 100 milliseconds or less
+ * [C-SR] Continuous input latency of 30 milliseconds or less
+ * [C-SR] Continuous round-trip latency of 50 milliseconds or less
+ * [C-SR] Minimize the cold input jitter
+ * [C-SR] Limit the error in input timestamps, as returned by
[AudioRecord.getTimestamp](https://developer.android.com/reference/android/media/AudioRecord.html#getTimestamp(android.media.AudioTimestamp,%20int))
or `AAudioStream_getTimestamp`, to +/- 1 ms.
