From bf20727f0aaf609bc3b495b07b45822b137d21ba Mon Sep 17 00:00:00 2001
From: Robert Shih <robertshih@google.com>
Date: Thu, 30 Oct 2014 17:22:11 -0700
Subject: PlaylistFetcher: check ts program streams before disabling a/v

Bug: 14648838
Change-Id: Ibf2b2cbb235f3d80bc33013e2afc053f13b9035f
---
 media/libstagefright/httplive/PlaylistFetcher.cpp |  6 ++---
 media/libstagefright/mpeg2ts/ATSParser.cpp        | 31 ++++++++++++++++++++---
 media/libstagefright/mpeg2ts/ATSParser.h          |  1 +
 3 files changed, 32 insertions(+), 6 deletions(-)

(limited to 'media/libstagefright')

diff --git a/media/libstagefright/httplive/PlaylistFetcher.cpp b/media/libstagefright/httplive/PlaylistFetcher.cpp
index 30fa868..0d9ed96 100644
--- a/media/libstagefright/httplive/PlaylistFetcher.cpp
+++ b/media/libstagefright/httplive/PlaylistFetcher.cpp
@@ -963,8 +963,8 @@ void PlaylistFetcher::onDownloadNext() {
     } while (bytesRead != 0);
 
     if (bufferStartsWithTsSyncByte(buffer)) {
-        // If we still don't see a stream after fetching a full ts segment mark it as
-        // nonexistent.
+        // If we don't see a stream in the program table after fetching a full ts segment
+        // mark it as nonexistent.
         const size_t kNumTypes = ATSParser::NUM_SOURCE_TYPES;
         ATSParser::SourceType srcTypes[kNumTypes] =
                 { ATSParser::VIDEO, ATSParser::AUDIO };
@@ -979,7 +979,7 @@ void PlaylistFetcher::onDownloadNext() {
                 static_cast<AnotherPacketSource *>(
                     mTSParser->getSource(srcType).get());
 
-            if (source == NULL) {
+            if (!mTSParser->hasSource(srcType)) {
                 ALOGW("MPEG2 Transport stream does not contain %s data.",
                       srcType == ATSParser::VIDEO ? "video" : "audio");
 
diff --git a/media/libstagefright/mpeg2ts/ATSParser.cpp b/media/libstagefright/mpeg2ts/ATSParser.cpp
index eab7616..c1dc0f9 100644
--- a/media/libstagefright/mpeg2ts/ATSParser.cpp
+++ b/media/libstagefright/mpeg2ts/ATSParser.cpp
@@ -63,6 +63,7 @@ struct ATSParser::Program : public RefBase {
     void signalEOS(status_t finalResult);
 
     sp<MediaSource> getSource(SourceType type);
+    bool hasSource(SourceType type) const;
 
     int64_t convertPTSToTimestamp(uint64_t PTS);
 
@@ -119,6 +120,9 @@ struct ATSParser::Stream : public RefBase {
 
     sp<MediaSource> getSource(SourceType type);
 
+    bool isAudio() const;
+    bool isVideo() const;
+
 protected:
     virtual ~Stream();
 
@@ -146,9 +150,6 @@ private:
 
     void extractAACFrames(const sp<ABuffer> &buffer);
 
-    bool isAudio() const;
-    bool isVideo() const;
-
     DISALLOW_EVIL_CONSTRUCTORS(Stream);
 };
 
@@ -440,6 +441,19 @@ sp<MediaSource> ATSParser::Program::getSource(SourceType type) {
     return NULL;
 }
 
+bool ATSParser::Program::hasSource(SourceType type) const {
+    for (size_t i = 0; i < mStreams.size(); ++i) {
+        const sp<Stream> &stream = mStreams.valueAt(i);
+        if (type == AUDIO && stream->isAudio()) {
+            return true;
+        } else if (type == VIDEO && stream->isVideo()) {
+            return true;
+        }
+    }
+
+    return false;
+}
+
 int64_t ATSParser::Program::convertPTSToTimestamp(uint64_t PTS) {
     if (!(mParser->mFlags & TS_TIMESTAMPS_ARE_ABSOLUTE)) {
         if (!mFirstPTSValid) {
@@ -1278,6 +1292,17 @@ sp<MediaSource> ATSParser::getSource(SourceType type) {
     return NULL;
 }
 
+bool ATSParser::hasSource(SourceType type) const {
+    for (size_t i = 0; i < mPrograms.size(); ++i) {
+        const sp<Program> &program = mPrograms.itemAt(i);
+        if (program->hasSource(type)) {
+            return true;
+        }
+    }
+
+    return false;
+}
+
 bool ATSParser::PTSTimeDeltaEstablished() {
     if (mPrograms.isEmpty()) {
         return false;
diff --git a/media/libstagefright/mpeg2ts/ATSParser.h b/media/libstagefright/mpeg2ts/ATSParser.h
index 8986a22..438bf45 100644
--- a/media/libstagefright/mpeg2ts/ATSParser.h
+++ b/media/libstagefright/mpeg2ts/ATSParser.h
@@ -76,6 +76,7 @@ struct ATSParser : public RefBase {
         NUM_SOURCE_TYPES = 2
     };
     sp<MediaSource> getSource(SourceType type);
+    bool hasSource(SourceType type) const;
 
     bool PTSTimeDeltaEstablished();
 
-- 
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