stagefright: Squashed commit of pause/resume features

Add 2 APIs (suspend/resume) in MediaPlayer

- API:suspend() will just pause the player and release all the decoders
  to replace release() which will release the whole player
- API:resume() will just init the decoders again,
  then start() will be called to restart streaming playback
- Add a check in AwesomePlayer::onVideoEvent()
  to make sure the first seek operation will always seek to the next
  i-frame

Change-Id: Ie4c82906a2a056378119921a656128ebdc1007c4

audio: Add pause support for hardware omx component

- ADSP doesn't enter sleep state after wma playback is paused
  and power suspended.
- No support for NT session pause in case of hardware component.
  NT session need to be paused to put ADSP into power collapse.
- Add support of pause in stagefright to ensure device enters
  suspend mode. Also add intermediate states to avoid concurrency
  issues between read and pause.

Change-Id: I41b946b8c8805e6ee303646b63513b5b16514ef6

libstagefright: Drain input buffer on resume

- Buffers returned from codec in paused state are not drained. When
codec is resumed these buffers are not drained until the next flush,
and may cause timed out issue.
- Added change to drain input buffers for sw decoders when resuming.

Change-Id: Ida2ab1d5dc3a1910accdd6fb89548262a912d8e7
CRs-Fixed: 569585, 574967

libstagefright: camcorder pause-resume implementation

- Add pause resume feature in camcorder app. So that
  user can pause recording and resume later which results
  in a single recorded clip.

Change-Id: Id19c45ae5bb85265aa4d5304b160ebf119d9575a

libstagefright: support pause/resume for timelapse recording

  Modify the timestamp calculation mechanism in CameraSourceTimeLapse
  in order to support pause/resume.

Change-Id: Icb02ea798b0b807ffb7ada2d1ef5b2414b74edfb

1 files changed, 31 insertions, 2 deletions

diff --git a/media/libstagefright/NuCachedSource2.cpp b/media/libstagefright/NuCachedSource2.cpp
index d6255d6..f72acf7 100644
--- a/media/libstagefright/NuCachedSource2.cpp
+++ b/media/libstagefright/NuCachedSource2.cpp
@@ -197,7 +197,8 @@ NuCachedSource2::NuCachedSource2(
       mHighwaterThresholdBytes(kDefaultHighWaterThreshold),
       mLowwaterThresholdBytes(kDefaultLowWaterThreshold),
       mKeepAliveIntervalUs(kDefaultKeepAliveIntervalUs),
-      mDisconnectAtHighwatermark(disconnectAtHighwatermark) {
+      mDisconnectAtHighwatermark(disconnectAtHighwatermark),
+      mSuspended(false) {
     // We are NOT going to support disconnect-at-highwatermark indefinitely
     // and we are not guaranteeing support for client-specified cache
     // parameters. Both of these are temporary measures to solve a specific
@@ -332,7 +333,7 @@ void NuCachedSource2::fetchInternal() {
         }
     }
 
-    if (reconnect) {
+    if (reconnect && !mSuspended) {
         status_t err =
             mSource->reconnectAtOffset(mCacheOffset + mCache->totalSize());
 
@@ -442,6 +443,13 @@ void NuCachedSource2::onFetch() {
         delayUs = 100000ll;
     }
 
+    if (mSuspended) {
+        static_cast<HTTPBase *>(mSource.get())->disconnect();
+        mFinalStatus = -EAGAIN;
+        return;
+    }
+
+
     (new AMessage(kWhatFetchMore, mReflector))->post(delayUs);
 }
 
@@ -771,4 +779,25 @@ void NuCachedSource2::RemoveCacheSpecificHeaders(
     }
 }
 
+status_t NuCachedSource2::disconnectWhileSuspend() {
+    if (mSource != NULL) {
+        static_cast<HTTPBase *>(mSource.get())->disconnect();
+        mFinalStatus = -EAGAIN;
+        mSuspended = true;
+    } else {
+        return ERROR_UNSUPPORTED;
+    }
+
+    return OK;
+}
+
+status_t NuCachedSource2::connectWhileResume() {
+    mSuspended = false;
+
+    // Begin to connect again and fetch more data
+    (new AMessage(kWhatFetchMore, mReflector))->post();
+
+    return OK;
+}
+
 }  // namespace android