Defines MediaPlayer APIs to support multiple audio/video/timedtext

tracks.

o Newly introduced APIs are (MediaPlayer):
  getTrackInfo() / addExternalSource() / enableTrack() / disableTrack().

o Timed text tracks are supported only, for now.

o TODOs:
 - Define the audio/video behavior for enableTrack and disableTrack.
 - Refactoring AwesomePlayer / TimedTextDriver so that all types of
   track index can be managed in the correct order and be ready for
   supporting audio/video tracks.
   (MediaExtractor and MediaSource for text file might be necessary.)

Change-Id: Idb85e1b3f2ed49a64f377d05472dd6663ce94e07

1 files changed, 11 insertions, 0 deletions

diff --git a/media/libstagefright/timedtext/TimedTextSRTSource.cpp b/media/libstagefright/timedtext/TimedTextSRTSource.cpp
index 3752d34..c44a99b 100644
--- a/media/libstagefright/timedtext/TimedTextSRTSource.cpp
+++ b/media/libstagefright/timedtext/TimedTextSRTSource.cpp
@@ -21,8 +21,10 @@
 #include <binder/Parcel.h>
 #include <media/stagefright/foundation/AString.h>
 #include <media/stagefright/DataSource.h>
+#include <media/stagefright/MediaDefs.h>  // for MEDIA_MIMETYPE_xxx
 #include <media/stagefright/MediaErrors.h>
 #include <media/stagefright/MediaSource.h>
+#include <media/stagefright/MetaData.h>
 
 #include "TimedTextSRTSource.h"
 #include "TextDescriptions.h"
@@ -31,6 +33,7 @@ namespace android {
 
 TimedTextSRTSource::TimedTextSRTSource(const sp<DataSource>& dataSource)
         : mSource(dataSource),
+          mMetaData(new MetaData),
           mIndex(0) {
 }
 
@@ -42,10 +45,14 @@ status_t TimedTextSRTSource::start() {
     if (err != OK) {
         reset();
     }
+    // TODO: Need to detect the language, because SRT doesn't give language
+    // information explicitly.
+    mMetaData->setCString(kKeyMediaLanguage, "");
     return err;
 }
 
 void TimedTextSRTSource::reset() {
+    mMetaData->clear();
     mTextVector.clear();
     mIndex = 0;
 }
@@ -272,4 +279,8 @@ status_t TimedTextSRTSource::extractAndAppendLocalDescriptions(
     return OK;
 }
 
+sp<MetaData> TimedTextSRTSource::getFormat() {
+    return mMetaData;
+}
+
 }  // namespace android