From 21902a8a489140902ff868f5957a16cacd11a7a3 Mon Sep 17 00:00:00 2001
From: Andreas Huber <andih@google.com>
Date: Thu, 8 Dec 2011 13:04:50 -0800
Subject: Don't perform RTSP seeks right away but queue them for 200ms

and only execute the last one.

Change-Id: I9ab342396ec9c9c03624a4b0306d1e180ceca000
related-to-bug: 5732960
---
 .../libmediaplayerservice/nuplayer/RTSPSource.cpp  | 30 +++++++++++++++++++---
 media/libmediaplayerservice/nuplayer/RTSPSource.h  |  5 ++++
 2 files changed, 31 insertions(+), 4 deletions(-)

diff --git a/media/libmediaplayerservice/nuplayer/RTSPSource.cpp b/media/libmediaplayerservice/nuplayer/RTSPSource.cpp
index e72adc4a24e8..02e5de62cda6 100644
--- a/media/libmediaplayerservice/nuplayer/RTSPSource.cpp
+++ b/media/libmediaplayerservice/nuplayer/RTSPSource.cpp
@@ -38,7 +38,8 @@ NuPlayer::RTSPSource::RTSPSource(
       mFlags(0),
       mState(DISCONNECTED),
       mFinalResult(OK),
-      mDisconnectReplyID(0) {
+      mDisconnectReplyID(0),
+      mSeekGeneration(0) {
     if (headers) {
         mExtraHeaders = *headers;
 
@@ -146,14 +147,21 @@ status_t NuPlayer::RTSPSource::getDuration(int64_t *durationUs) {
 }
 
 status_t NuPlayer::RTSPSource::seekTo(int64_t seekTimeUs) {
+    sp<AMessage> msg = new AMessage(kWhatPerformSeek, mReflector->id());
+    msg->setInt32("generation", ++mSeekGeneration);
+    msg->setInt64("timeUs", seekTimeUs);
+    msg->post(200000ll);
+
+    return OK;
+}
+
+void NuPlayer::RTSPSource::performSeek(int64_t seekTimeUs) {
     if (mState != CONNECTED) {
-        return UNKNOWN_ERROR;
+        return;
     }
 
     mState = SEEKING;
     mHandler->seek(seekTimeUs);
-
-    return OK;
 }
 
 bool NuPlayer::RTSPSource::isSeekable() {
@@ -168,6 +176,20 @@ void NuPlayer::RTSPSource::onMessageReceived(const sp<AMessage> &msg) {
         mDisconnectReplyID = replyID;
         finishDisconnectIfPossible();
         return;
+    } else if (msg->what() == kWhatPerformSeek) {
+        int32_t generation;
+        CHECK(msg->findInt32("generation", &generation));
+
+        if (generation != mSeekGeneration) {
+            // obsolete.
+            return;
+        }
+
+        int64_t seekTimeUs;
+        CHECK(msg->findInt64("timeUs", &seekTimeUs));
+
+        performSeek(seekTimeUs);
+        return;
     }
 
     CHECK_EQ(msg->what(), (int)kWhatNotify);
diff --git a/media/libmediaplayerservice/nuplayer/RTSPSource.h b/media/libmediaplayerservice/nuplayer/RTSPSource.h
index 66eab7254df0..ef4da732d67f 100644
--- a/media/libmediaplayerservice/nuplayer/RTSPSource.h
+++ b/media/libmediaplayerservice/nuplayer/RTSPSource.h
@@ -56,6 +56,7 @@ private:
     enum {
         kWhatNotify          = 'noti',
         kWhatDisconnect      = 'disc',
+        kWhatPerformSeek     = 'seek',
     };
 
     enum State {
@@ -95,12 +96,16 @@ private:
     sp<AnotherPacketSource> mAudioTrack;
     sp<AnotherPacketSource> mVideoTrack;
 
+    int32_t mSeekGeneration;
+
     sp<AnotherPacketSource> getSource(bool audio);
 
     void onConnected();
     void onDisconnected(const sp<AMessage> &msg);
     void finishDisconnectIfPossible();
 
+    void performSeek(int64_t seekTimeUs);
+
     DISALLOW_EVIL_CONSTRUCTORS(RTSPSource);
 };
 
-- 
cgit v1.2.3-59-g8ed1b