From 40eac6ed7a76a6ec813759bcbd5c998e0b8ac949 Mon Sep 17 00:00:00 2001
From: Arun Johnson <arunjohnson@google.com>
Date: Fri, 19 Jan 2024 17:23:00 +0000
Subject: [PATCH] Adding MediaFormat keys for large frame audio
Bug: 298052174
Change-Id: I369affbb103cbf860a2fabfc1b85f0c44750ed82
---
core/api/current.txt | 2 +
media/java/android/media/MediaFormat.java | 49 +++++++++++++++++++++++
2 files changed, 51 insertions(+)
diff --git a/core/api/current.txt b/core/api/current.txt
index b6b8b6e65cd3..6ac41220dfb9 100644
--- a/core/api/current.txt
+++ b/core/api/current.txt
@@ -23603,6 +23603,8 @@ package android.media {
field public static final String KEY_AUDIO_SESSION_ID = "audio-session-id";
field public static final String KEY_BITRATE_MODE = "bitrate-mode";
field public static final String KEY_BIT_RATE = "bitrate";
+ field @FlaggedApi("com.android.media.codec.flags.large_audio_frame") public static final String KEY_BUFFER_BATCH_MAX_OUTPUT_SIZE = "buffer-batch-max-output-size";
+ field @FlaggedApi("com.android.media.codec.flags.large_audio_frame") public static final String KEY_BUFFER_BATCH_THRESHOLD_OUTPUT_SIZE = "buffer-batch-threshold-output-size";
field public static final String KEY_CAPTION_SERVICE_NUMBER = "caption-service-number";
field public static final String KEY_CAPTURE_RATE = "capture-rate";
field public static final String KEY_CHANNEL_COUNT = "channel-count";
diff --git a/media/java/android/media/MediaFormat.java b/media/java/android/media/MediaFormat.java
index 587e35b4b1fc..5e40eee26886 100644
--- a/media/java/android/media/MediaFormat.java
+++ b/media/java/android/media/MediaFormat.java
@@ -17,6 +17,7 @@
package android.media;
import static com.android.media.codec.flags.Flags.FLAG_CODEC_IMPORTANCE;
+import static com.android.media.codec.flags.Flags.FLAG_LARGE_AUDIO_FRAME;
import android.annotation.FlaggedApi;
import android.annotation.IntDef;
@@ -121,6 +122,10 @@ import java.util.stream.Collectors;
* <tr><td>{@link #KEY_MPEGH_REFERENCE_CHANNEL_LAYOUT}</td>
* <td>Integer</td><td><b>decoder-only</b>, optional, if content is MPEG-H audio,
* specifies the preferred reference channel layout of the stream.</td></tr>
+ * <tr><td>{@link #KEY_MAX_BUFFER_BATCH_OUTPUT_SIZE}</td><td>Integer</td><td>optional, used with
+ * large audio frame support, specifies max size of output buffer in bytes.</td></tr>
+ * <tr><td>{@link #KEY_BUFFER_BATCH_THRESHOLD_OUTPUT_SIZE}</td><td>Integer</td><td>optional,
+ * used with large audio frame support, specifies threshold output size in bytes.</td></tr>
* </table>
*
* Subtitle formats have the following keys:
@@ -458,6 +463,50 @@ public final class MediaFormat {
*/
public static final String KEY_MAX_INPUT_SIZE = "max-input-size";
+ /**
+ * A key describing the maximum output buffer size in bytes when using
+ * large buffer mode containing multiple access units.
+ *
+ * When not-set - codec functions with one access-unit per frame.
+ * When set less than the size of two access-units - will make codec
+ * operate in single access-unit per output frame.
+ * When set to a value too big - The component or the framework will
+ * override this value to a reasonable max size not exceeding typical
+ * 10 seconds of data (device dependent) when set to a value larger than
+ * that. The value final value used will be returned in the output format.
+ *
+ * The associated value is an integer
+ *
+ * @see FEATURE_MultipleFrames
+ */
+ @FlaggedApi(FLAG_LARGE_AUDIO_FRAME)
+ public static final String KEY_BUFFER_BATCH_MAX_OUTPUT_SIZE = "buffer-batch-max-output-size";
+
+ /**
+ * A key describing the threshold output size in bytes when using large buffer
+ * mode containing multiple access units.
+ *
+ * This is an optional parameter.
+ *
+ * If not set - the component can set this to a reasonable value.
+ * If set larger than max size, the components will
+ * clip this setting to maximum buffer batching output size.
+ *
+ * The component will return a partial output buffer if the output buffer reaches or
+ * surpass this limit.
+ *
+ * Threshold size should be always less or equal to KEY_MAX_BUFFER_BATCH_OUTPUT_SIZE.
+ * The final setting of this value as determined by the component will be returned
+ * in the output format
+ *
+ * The associated value is an integer
+ *
+ * @see FEATURE_MultipleFrames
+ */
+ @FlaggedApi(FLAG_LARGE_AUDIO_FRAME)
+ public static final String KEY_BUFFER_BATCH_THRESHOLD_OUTPUT_SIZE =
+ "buffer-batch-threshold-output-size";
+
/**
* A key describing the pixel aspect ratio width.
* The associated value is an integer
--
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