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, 57 insertions, 3 deletions

diff --git a/media/libmedia/mediaplayer.cpp b/media/libmedia/mediaplayer.cpp
index 6c0606c..3c6bef3 100644
--- a/media/libmedia/mediaplayer.cpp
+++ b/media/libmedia/mediaplayer.cpp
@@ -333,6 +333,9 @@ status_t MediaPlayer::start()
                 ALOGV("playback completed immediately following start()");
             }
         }
+    } else if ( (mPlayer != 0) && (mCurrentState & MEDIA_PLAYER_SUSPENDED) ) {
+        ALOGV("start while suspended, so ignore this start");
+        ret = NO_ERROR;
     } else {
         ALOGE("start called in state %d", mCurrentState);
         ret = INVALID_OPERATION;
@@ -488,7 +491,8 @@ status_t MediaPlayer::getDuration_l(int *msec)
 {
     ALOGV("getDuration_l");
     bool isValidState = (mCurrentState & (MEDIA_PLAYER_PREPARED | MEDIA_PLAYER_STARTED |
-            MEDIA_PLAYER_PAUSED | MEDIA_PLAYER_STOPPED | MEDIA_PLAYER_PLAYBACK_COMPLETE));
+            MEDIA_PLAYER_PAUSED | MEDIA_PLAYER_STOPPED | MEDIA_PLAYER_PLAYBACK_COMPLETE |
+            MEDIA_PLAYER_SUSPENDED));
     if (mPlayer != 0 && isValidState) {
         int durationMs;
         status_t ret = mPlayer->getDuration(&durationMs);
@@ -518,7 +522,7 @@ status_t MediaPlayer::seekTo_l(int msec)
 {
     ALOGV("seekTo %d", msec);
     if ((mPlayer != 0) && ( mCurrentState & ( MEDIA_PLAYER_STARTED | MEDIA_PLAYER_PREPARED |
-            MEDIA_PLAYER_PAUSED |  MEDIA_PLAYER_PLAYBACK_COMPLETE) ) ) {
+            MEDIA_PLAYER_PAUSED |  MEDIA_PLAYER_PLAYBACK_COMPLETE | MEDIA_PLAYER_SUSPENDED) ) ) {
         if ( msec < 0 ) {
             ALOGW("Attempt to seek to invalid position: %d", msec);
             msec = 0;
@@ -939,4 +943,54 @@ status_t MediaPlayer::setNextMediaPlayer(const sp<MediaPlayer>& next) {
     return mPlayer->setNextPlayer(next == NULL ? NULL : next->mPlayer);
 }
 
-} // namespace android
+status_t MediaPlayer::suspend() {
+    ALOGV("MediaPlayer::suspend()");
+    Mutex::Autolock _l(mLock);
+    if (mPlayer == NULL) {
+        ALOGE("mPlayer = NULL");
+        return NO_INIT;
+    }
+
+    bool isValidState = (mCurrentState & (MEDIA_PLAYER_PREPARED | MEDIA_PLAYER_STARTED | MEDIA_PLAYER_PAUSED | MEDIA_PLAYER_STOPPED | MEDIA_PLAYER_PLAYBACK_COMPLETE | MEDIA_PLAYER_SUSPENDED));
+
+    if (!isValidState) {
+        ALOGE("suspend while in a invalid state = %d", mCurrentState);
+        return UNKNOWN_ERROR;
+    }
+
+    status_t ret = mPlayer->suspend();
+
+    if (OK != ret) {
+        ALOGE("MediaPlayer::suspend() return with error ret = %d", ret);
+        return ret;
+    }
+    mCurrentState = MEDIA_PLAYER_SUSPENDED;
+    return OK;
+}
+
+status_t MediaPlayer::resume() {
+    ALOGV("MediaPlayer::resume()");
+    Mutex::Autolock _l(mLock);
+    if (mPlayer == NULL) {
+        ALOGE("mPlayer == NULL");
+        return NO_INIT;
+    }
+
+    bool isValidState = (mCurrentState == MEDIA_PLAYER_SUSPENDED);
+
+    if (!isValidState) {
+        ALOGE("resume while in a invalid state = %d", mCurrentState);
+        return UNKNOWN_ERROR;
+    }
+
+    status_t ret = mPlayer->resume();
+
+    if (OK != ret) {
+        ALOGE("MediaPlayer::resume() return with error ret = %d", ret);
+        return ret;
+    }
+    mCurrentState = MEDIA_PLAYER_PREPARED;
+    return OK;
+}
+
+}; // namespace android