video: Use boot clock for recording start time

Camera HAL3 uses boot time for buffer timestamp, rather
than system monotonic time. This leads to issues as
framework uses system monotonic time as reference start
time for timestamp adjustment.

Add change to use boot time for reference start time.

CRs-Fixed: 946735

Change-Id: Id0af9c8aed1a983095275ac03f7f59abc31594cc

3 files changed, 28 insertions, 2 deletions

diff --git a/media/libstagefright/CameraSource.cpp b/media/libstagefright/CameraSource.cpp
index e2ad924..64e7f90 100644
--- a/media/libstagefright/CameraSource.cpp
+++ b/media/libstagefright/CameraSource.cpp
@@ -701,7 +701,15 @@ status_t CameraSource::start(MetaData *meta) {
 
     if (meta) {
         int64_t startTimeUs;
-        if (meta->findInt64(kKeyTime, &startTimeUs)) {
+
+        auto key = kKeyTimeBoot;
+        char value[PROPERTY_VALUE_MAX];
+        if (property_get("media.camera.ts.monotonic", value, "0") &&
+            atoi(value)) {
+            key = kKeyTime;
+        }
+
+        if (meta->findInt64(key, &startTimeUs)) {
             mStartTimeUs = startTimeUs;
         }
 
diff --git a/media/libstagefright/MPEG4Writer.cpp b/media/libstagefright/MPEG4Writer.cpp
index 6a8664e..16da3eb 100644
--- a/media/libstagefright/MPEG4Writer.cpp
+++ b/media/libstagefright/MPEG4Writer.cpp
@@ -1837,9 +1837,16 @@ status_t MPEG4Writer::Track::start(MetaData *params) {
     }
 
     int64_t startTimeUs;
+
     if (params == NULL || !params->findInt64(kKeyTime, &startTimeUs)) {
         startTimeUs = 0;
     }
+
+    int64_t startTimeBootUs;
+    if (params == NULL || !params->findInt64(kKeyTimeBoot, &startTimeBootUs)) {
+        startTimeBootUs = 0;
+    }
+
     mStartTimeRealUs = startTimeUs;
 
     int32_t rotationDegrees;
@@ -1850,6 +1857,7 @@ status_t MPEG4Writer::Track::start(MetaData *params) {
     initTrackingProgressStatus(params);
 
     sp<MetaData> meta = new MetaData;
+
     if (mOwner->isRealTimeRecording() && mOwner->numTracks() > 1) {
         /*
          * This extra delay of accepting incoming audio/video signals
@@ -1865,10 +1873,12 @@ status_t MPEG4Writer::Track::start(MetaData *params) {
             startTimeOffsetUs = kInitialDelayTimeUs;
         }
         startTimeUs += startTimeOffsetUs;
+        startTimeBootUs += startTimeOffsetUs;
         ALOGI("Start time offset: %" PRId64 " us", startTimeOffsetUs);
     }
 
     meta->setInt64(kKeyTime, startTimeUs);
+    meta->setInt64(kKeyTimeBoot, startTimeBootUs);
 
     status_t err = mSource->start(meta.get());
     if (err != OK) {
diff --git a/media/libstagefright/MediaCodecSource.cpp b/media/libstagefright/MediaCodecSource.cpp
index adbde54..b15ee64 100644
--- a/media/libstagefright/MediaCodecSource.cpp
+++ b/media/libstagefright/MediaCodecSource.cpp
@@ -38,6 +38,7 @@
 #include <media/stagefright/Utils.h>
 #include <OMX_Core.h>
 #include <stagefright/AVExtensions.h>
+#include <cutils/properties.h>
 
 namespace android {
 
@@ -663,8 +664,15 @@ status_t MediaCodecSource::onStart(MetaData *params) {
     status_t err = OK;
 
     if (mFlags & FLAG_USE_SURFACE_INPUT) {
+        auto key = kKeyTimeBoot;
+        char value[PROPERTY_VALUE_MAX];
+        if (property_get("media.camera.ts.monotonic", value, "0") &&
+            atoi(value)) {
+            key = kKeyTime;
+        }
+
         int64_t startTimeUs;
-        if (!params || !params->findInt64(kKeyTime, &startTimeUs)) {
+        if (!params || !params->findInt64(key, &startTimeUs)) {
             startTimeUs = -1ll;
         }
         resume(startTimeUs);