From 7fbdb0903dfbf70b314a74e64e28fb880cdb9247 Mon Sep 17 00:00:00 2001
From: Andreas Huber <andih@google.com>
Date: Tue, 12 Oct 2010 16:55:11 -0700
Subject: Attempt to derive the avg. bitrate of the entire stream from
metadata.
related-to-bug: 3093224
Change-Id: I4726b023373e04468cc12fd64f7fe6ee923add95
---
media/libstagefright/AwesomePlayer.cpp | 55 +++++++++++++++++++++++-----
media/libstagefright/include/AwesomePlayer.h | 4 ++
2 files changed, 50 insertions(+), 9 deletions(-)
diff --git a/media/libstagefright/AwesomePlayer.cpp b/media/libstagefright/AwesomePlayer.cpp
index 69389f5..57bea8c 100644
--- a/media/libstagefright/AwesomePlayer.cpp
+++ b/media/libstagefright/AwesomePlayer.cpp
@@ -303,6 +303,28 @@ status_t AwesomePlayer::setDataSource_l(
}
status_t AwesomePlayer::setDataSource_l(const sp<MediaExtractor> &extractor) {
+ // Attempt to approximate overall stream bitrate by summing all
+ // tracks' individual bitrates, if not all of them advertise bitrate,
+ // we have to fail.
+
+ int64_t totalBitRate = 0;
+
+ for (size_t i = 0; i < extractor->countTracks(); ++i) {
+ sp<MetaData> meta = extractor->getTrackMetaData(i);
+
+ int32_t bitrate;
+ if (!meta->findInt32(kKeyBitRate, &bitrate)) {
+ totalBitRate = -1;
+ break;
+ }
+
+ totalBitRate += bitrate;
+ }
+
+ mBitrate = totalBitRate;
+
+ LOGV("mBitrate = %lld bits/sec", mBitrate);
+
bool haveAudio = false;
bool haveVideo = false;
for (size_t i = 0; i < extractor->countTracks(); ++i) {
@@ -441,6 +463,8 @@ void AwesomePlayer::reset_l() {
delete mSuspensionState;
mSuspensionState = NULL;
+
+ mBitrate = -1;
}
void AwesomePlayer::notifyListener_l(int msg, int ext1, int ext2) {
@@ -453,17 +477,32 @@ void AwesomePlayer::notifyListener_l(int msg, int ext1, int ext2) {
}
}
+bool AwesomePlayer::getBitrate(int64_t *bitrate) {
+ off_t size;
+ if (mDurationUs >= 0 && mCachedSource != NULL
+ && mCachedSource->getSize(&size) == OK) {
+ *bitrate = size * 8000000ll / mDurationUs; // in bits/sec
+ return true;
+ }
+
+ if (mBitrate >= 0) {
+ *bitrate = mBitrate;
+ return true;
+ }
+
+ *bitrate = 0;
+
+ return false;
+}
+
// Returns true iff cached duration is available/applicable.
bool AwesomePlayer::getCachedDuration_l(int64_t *durationUs, bool *eos) {
- off_t totalSize;
+ int64_t bitrate;
if (mRTSPController != NULL) {
*durationUs = mRTSPController->getQueueDurationUs(eos);
return true;
- } else if (mCachedSource != NULL && mDurationUs >= 0
- && mCachedSource->getSize(&totalSize) == OK) {
- int64_t bitrate = totalSize * 8000000ll / mDurationUs; // in bits/sec
-
+ } else if (mCachedSource != NULL && getBitrate(&bitrate)) {
size_t cachedDataRemaining = mCachedSource->approxDataRemaining(eos);
*durationUs = cachedDataRemaining * 8000000ll / bitrate;
return true;
@@ -490,10 +529,8 @@ void AwesomePlayer::onBufferingUpdate() {
finishAsyncPrepare_l();
}
} else {
- off_t size;
- if (mDurationUs >= 0 && mCachedSource->getSize(&size) == OK) {
- int64_t bitrate = size * 8000000ll / mDurationUs; // in bits/sec
-
+ int64_t bitrate;
+ if (getBitrate(&bitrate)) {
size_t cachedSize = mCachedSource->cachedSize();
int64_t cachedDurationUs = cachedSize * 8000000ll / bitrate;
diff --git a/media/libstagefright/include/AwesomePlayer.h b/media/libstagefright/include/AwesomePlayer.h
index 079adca..46a0c65 100644
--- a/media/libstagefright/include/AwesomePlayer.h
+++ b/media/libstagefright/include/AwesomePlayer.h
@@ -152,6 +152,8 @@ private:
bool mSeekNotificationSent;
int64_t mSeekTimeUs;
+ int64_t mBitrate; // total bitrate of the file (in bps) or -1 if unknown.
+
bool mWatchForAudioSeekComplete;
bool mWatchForAudioEOS;
@@ -254,6 +256,8 @@ private:
static void OnRTSPSeekDoneWrapper(void *cookie);
void onRTSPSeekDone();
+ bool getBitrate(int64_t *bitrate);
+
AwesomePlayer(const AwesomePlayer &);
AwesomePlayer &operator=(const AwesomePlayer &);
};
--
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