Add external timed text source using a passed file descriptor

o Also fixed a minor issue where the file length should be of type off64_t rather than size_t

o related-to-bug: 5542712

Change-Id: I35fd8ceea0bc75e553b7f4a99932cf58ea560c4e

2 files changed, 22 insertions, 11 deletions

diff --git a/media/libstagefright/AwesomePlayer.cpp b/media/libstagefright/AwesomePlayer.cpp
index f96a4df..120a410 100644
--- a/media/libstagefright/AwesomePlayer.cpp
+++ b/media/libstagefright/AwesomePlayer.cpp
@@ -2292,7 +2292,7 @@ status_t AwesomePlayer::invoke(const Parcel &request, Parcel *reply) {
             }
             int fd         = request.readFileDescriptor();
             off64_t offset = request.readInt64();
-            size_t length  = request.readInt64();
+            off64_t length  = request.readInt64();
             String8 mimeType(request.readString16());
             return mTextDriver->addOutOfBandTextSource(
                     fd, offset, length, mimeType);
diff --git a/media/libstagefright/timedtext/TimedTextDriver.cpp b/media/libstagefright/timedtext/TimedTextDriver.cpp
index 8ee15f8..7aad11b 100644
--- a/media/libstagefright/timedtext/TimedTextDriver.cpp
+++ b/media/libstagefright/timedtext/TimedTextDriver.cpp
@@ -23,6 +23,7 @@
 #include <media/mediaplayer.h>
 #include <media/MediaPlayerInterface.h>
 #include <media/stagefright/DataSource.h>
+#include <media/stagefright/FileSource.h>
 #include <media/stagefright/MediaDefs.h>
 #include <media/stagefright/MediaErrors.h>
 #include <media/stagefright/MediaSource.h>
@@ -161,15 +162,32 @@ status_t TimedTextDriver::addInBandTextSource(
 
 status_t TimedTextDriver::addOutOfBandTextSource(
         const char *uri, const char *mimeType) {
-    // TODO: Define "TimedTextSource::CreateFromURI(uri)"
-    // and move below lines there..?
-
     // To support local subtitle file only for now
     if (strncasecmp("file://", uri, 7)) {
+        ALOGE("uri('%s') is not a file", uri);
         return ERROR_UNSUPPORTED;
     }
+
     sp<DataSource> dataSource =
             DataSource::CreateFromURI(uri);
+    return createOutOfBandTextSource(mimeType, dataSource);
+}
+
+status_t TimedTextDriver::addOutOfBandTextSource(
+        int fd, off64_t offset, off64_t length, const char *mimeType) {
+
+    if (fd < 0) {
+        ALOGE("Invalid file descriptor: %d", fd);
+        return ERROR_UNSUPPORTED;
+    }
+
+    sp<DataSource> dataSource = new FileSource(dup(fd), offset, length);
+    return createOutOfBandTextSource(mimeType, dataSource);
+}
+
+status_t TimedTextDriver::createOutOfBandTextSource(
+        const char *mimeType, const sp<DataSource>& dataSource) {
+
     if (dataSource == NULL) {
         return ERROR_UNSUPPORTED;
     }
@@ -189,13 +207,6 @@ status_t TimedTextDriver::addOutOfBandTextSource(
     return OK;
 }
 
-status_t TimedTextDriver::addOutOfBandTextSource(
-        int fd, off64_t offset, size_t length, const char *mimeType) {
-    // Not supported yet. This requires DataSource::sniff to detect various text
-    // formats such as srt/smi/ttml.
-    return ERROR_UNSUPPORTED;
-}
-
 void TimedTextDriver::getTrackInfo(Parcel *parcel) {
     Mutex::Autolock autoLock(mLock);
     Vector<sp<TimedTextSource> >::const_iterator iter;