[ECOService] Add debugString functionality to ECOData.

The ECOData could now be dumped to a std::string. Sample output:
processSessionStats ECOData(type = Stats) = {
 int32_t encoder-target-bitrate-bps = 22000000, int32_t encoder-level = 65536, float encoder-framerate-fps = 30.000000, int32_t encoder-profile = 8, int32_t encoder-kfi-frames = 30, int32_t encoder-type = 1, string stats-type = stats-type-session}

Bug: 117877984
Test: Unit test.

Change-Id: Ia6e018f2b46b64d4f8a1e00b1c4e41d123061ddb

3 files changed, 78 insertions, 0 deletions

diff --git a/media/eco/ECOData.cpp b/media/eco/ECOData.cpp
index 1c6048a..189e609 100644
--- a/media/eco/ECOData.cpp
+++ b/media/eco/ECOData.cpp
@@ -20,6 +20,7 @@
 #include "eco/ECOData.h"
 
 #include <binder/Parcel.h>
+#include <inttypes.h>
 #include <utils/Errors.h>
 #include <utils/Log.h>
 
@@ -344,6 +345,77 @@ ECOData::ECODataKeyValuePair ECODataKeyValueIterator::next() const {
     return ECOData::ECODataKeyValuePair(mIterator->first, mIterator->second);
 }
 
+std::string ECOData::debugString() const {
+    std::string s = "ECOData(type = ";
+
+    std::string tmp;
+    switch (mDataType) {
+    case DATA_TYPE_UNKNOWN:
+        tmp = "Unknown";
+        break;
+    case DATA_TYPE_STATS:
+        tmp = "Stats";
+        break;
+    case DATA_TYPE_INFO:
+        tmp = "Info";
+        break;
+    case DATA_TYPE_STATS_PROVIDER_CONFIG:
+        tmp = "Stats provider config";
+        break;
+    case DATA_TYPE_INFO_LISTENER_CONFIG:
+        tmp = "Info listener config";
+        break;
+    default:
+        break;
+    }
+    s.append(tmp);
+    s.append(") = {\n  ");
+
+    // Writes out the key-value pairs one by one.
+    for (const auto& it : mKeyValueStore) {
+        const size_t SIZE = 100;
+        char keyValue[SIZE];
+        const ECODataValueType& value = it.second;
+        switch (static_cast<ValueType>(value.index())) {
+        case kTypeInt32:
+            snprintf(keyValue, SIZE, "int32_t %s = %d, ", it.first.c_str(),
+                     std::get<int32_t>(it.second));
+            break;
+        case kTypeInt64:
+            snprintf(keyValue, SIZE, "int64_t %s = %" PRId64 ", ", it.first.c_str(),
+                     std::get<int64_t>(it.second));
+            break;
+        case kTypeSize:
+            snprintf(keyValue, SIZE, "size_t %s = %zu, ", it.first.c_str(),
+                     std::get<size_t>(it.second));
+            break;
+        case kTypeFloat:
+            snprintf(keyValue, SIZE, "float %s = %f, ", it.first.c_str(),
+                     std::get<float>(it.second));
+            break;
+        case kTypeDouble:
+            snprintf(keyValue, SIZE, "double %s = %f, ", it.first.c_str(),
+                     std::get<double>(it.second));
+            break;
+        case kTypeString:
+            snprintf(keyValue, SIZE, "string %s = %s, ", it.first.c_str(),
+                     std::get<std::string>(it.second).c_str());
+            break;
+        case kTypeInt8:
+            snprintf(keyValue, SIZE, "int8_t %s = %d, ", it.first.c_str(),
+                     std::get<int8_t>(it.second));
+            break;
+        default:
+            break;
+        }
+        s.append(keyValue);
+    }
+
+    s.append("\n }");
+
+    return s;
+}
+
 }  // namespace eco
 }  // namespace media
 }  // namespace android
diff --git a/media/eco/ECOSession.cpp b/media/eco/ECOSession.cpp
index 319bac5..eefc3d6 100644
--- a/media/eco/ECOSession.cpp
+++ b/media/eco/ECOSession.cpp
@@ -114,6 +114,8 @@ void ECOSession::run() {
 }
 
 bool ECOSession::processStats(const ECOData& stats) {
+    ECOLOGV("%s: receive stats: %s", __FUNCTION__, stats.debugString().c_str());
+
     if (stats.getDataType() != ECOData::DATA_TYPE_STATS) {
         ECOLOGE("Invalid stats. ECOData with type: %s", stats.getDataTypeString().c_str());
         return false;
@@ -191,6 +193,7 @@ bool ECOSession::processSessionStats(const ECOData& stats) {
     }
 
     if (mListener != nullptr) {
+        ECOLOGV("%s: publish info: %s", __FUNCTION__, info.debugString().c_str());
         mListener->onNewInfo(info);
     }
 
diff --git a/media/eco/include/eco/ECOData.h b/media/eco/include/eco/ECOData.h
index 9848110..cb42982 100644
--- a/media/eco/include/eco/ECOData.h
+++ b/media/eco/include/eco/ECOData.h
@@ -158,6 +158,9 @@ public:
 
     friend bool copyKeyValue(const ECOData& src, ECOData* dst);
 
+    // Dump the ECOData as a string.
+    std::string debugString() const;
+
 protected:
     // ValueType. This must match the index in ECODataValueType.
     enum ValueType {