From 771d2032049b5531556feceddd6f06b874c32cff Mon Sep 17 00:00:00 2001
From: tofunmi <tofunmi@google.com>
Date: Tue, 24 Oct 2023 03:20:04 -0700
Subject: [PATCH] ExoAssetLoaderRenderer:Drop negative timestamp buffers when
 transmuxing

Prevents queuing unneeded buffers when transmuxing. (we already do this when transcoding).

PiperOrigin-RevId: 576080462
---
 .../media3/transformer/ExoAssetLoaderBaseRenderer.java        | 4 +---
 .../media3/transformer/ExoAssetLoaderVideoRenderer.java       | 4 ++++
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/libraries/transformer/src/main/java/androidx/media3/transformer/ExoAssetLoaderBaseRenderer.java b/libraries/transformer/src/main/java/androidx/media3/transformer/ExoAssetLoaderBaseRenderer.java
index 5f42ef4831..1a155ea4ac 100644
--- a/libraries/transformer/src/main/java/androidx/media3/transformer/ExoAssetLoaderBaseRenderer.java
+++ b/libraries/transformer/src/main/java/androidx/media3/transformer/ExoAssetLoaderBaseRenderer.java
@@ -174,9 +174,7 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
    *
    * <p>The input buffer is cleared if it should be dropped.
    */
-  protected boolean shouldDropInputBuffer(DecoderInputBuffer inputBuffer) {
-    return false;
-  }
+  protected abstract boolean shouldDropInputBuffer(DecoderInputBuffer inputBuffer);
 
   /** Called before a {@link DecoderInputBuffer} is queued to the decoder. */
   protected void onDecoderInputReady(DecoderInputBuffer inputBuffer) {}
diff --git a/libraries/transformer/src/main/java/androidx/media3/transformer/ExoAssetLoaderVideoRenderer.java b/libraries/transformer/src/main/java/androidx/media3/transformer/ExoAssetLoaderVideoRenderer.java
index d5c9dff1ad..2871a7cf17 100644
--- a/libraries/transformer/src/main/java/androidx/media3/transformer/ExoAssetLoaderVideoRenderer.java
+++ b/libraries/transformer/src/main/java/androidx/media3/transformer/ExoAssetLoaderVideoRenderer.java
@@ -115,6 +115,10 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
 
     if (decoder == null) {
       inputBuffer.timeUs -= streamStartPositionUs;
+      if (inputBuffer.timeUs < 0) {
+        inputBuffer.clear();
+        return true;
+      }
     }
     return false;
   }