1 files changed, 42 insertions, 0 deletions
diff --git a/dom/media/platforms/EncoderConfig.cpp b/dom/media/platforms/EncoderConfig.cpp
index ed780b947c..2c32e4c2ff 100644
--- a/dom/media/platforms/EncoderConfig.cpp
+++ b/dom/media/platforms/EncoderConfig.cpp
@@ -7,6 +7,7 @@
 #include "EncoderConfig.h"
 #include "MP4Decoder.h"
 #include "VPXDecoder.h"
+#include "mozilla/dom/BindingUtils.h"
 
 namespace mozilla {
 
@@ -24,4 +25,45 @@ CodecType EncoderConfig::CodecTypeForMime(const nsACString& aMimeType) {
   return CodecType::Unknown;
 }
 
+const char* CodecTypeStrings[] = {
+    "BeginVideo", "H264", "VP8", "VP9",  "EndVideo", "Opus",   "Vorbis",
+    "Flac",       "AAC",  "PCM", "G722", "EndAudio", "Unknown"};
+
+nsCString EncoderConfig::ToString() const {
+  nsCString rv;
+  rv.Append(CodecTypeStrings[UnderlyingValue(mCodec)]);
+  rv.AppendLiteral(mBitrateMode == BitrateMode::Constant ? " (CBR)" : " (VBR)");
+  rv.AppendPrintf("%" PRIu32 "bps", mBitrate);
+  if (mUsage == Usage::Realtime) {
+    rv.AppendLiteral(", realtime");
+  } else {
+    rv.AppendLiteral(", record");
+  }
+  if (mCodec > CodecType::_BeginVideo_ && mCodec < CodecType::_EndVideo_) {
+    rv.AppendPrintf(" [%dx%d]", mSize.Width(), mSize.Height());
+    if (mHardwarePreference == HardwarePreference::RequireHardware) {
+      rv.AppendLiteral(", hw required");
+    } else if (mHardwarePreference == HardwarePreference::RequireSoftware) {
+      rv.AppendLiteral(", sw required");
+    } else {
+      rv.AppendLiteral(", hw: no preference");
+    }
+    rv.AppendPrintf(" format: %s", GetEnumString(mPixelFormat).get());
+    rv.AppendPrintf(" format (source): %s",
+                    GetEnumString(mSourcePixelFormat).get());
+    if (mScalabilityMode == ScalabilityMode::L1T2) {
+      rv.AppendLiteral(" (L1T2)");
+    } else if (mScalabilityMode == ScalabilityMode::L1T3) {
+      rv.AppendLiteral(" (L1T2)");
+    }
+    rv.AppendPrintf(", fps: %" PRIu8, mFramerate);
+    rv.AppendPrintf(", kf interval: %zu", mKeyframeInterval);
+  } else {
+    rv.AppendPrintf(", ch: %" PRIu32 ", %" PRIu32 "Hz", mNumberOfChannels,
+                    mSampleRate);
+  }
+  rv.AppendPrintf("(w/%s codec specific)", mCodecSpecific ? "" : "o");
+  return rv;
+};
+
 }  // namespace mozilla