[Chromecast] Add frequency offset to MediaPipelineBackend.

BUG= internal b/25460758

Review URL: https://codereview.chromium.org/1434403003

Cr-Commit-Position: refs/heads/master@{#359934}

3 files changed, 53 insertions, 0 deletions

diff --git a/chromecast/media/base/cast_media_default.cc b/chromecast/media/base/cast_media_default.cc
index 1f44a68..82ac496 100644
--- a/chromecast/media/base/cast_media_default.cc
+++ b/chromecast/media/base/cast_media_default.cc
@@ -65,5 +65,24 @@ MediaCodecSupportShlib::CodecSupport MediaCodecSupportShlib::IsSupported(
   return kDefault;
 }
 
+double CastMediaShlib::GetMediaClockRate() {
+  return 0.0;
+}
+
+double CastMediaShlib::MediaClockRatePrecision() {
+  return 0.0;
+}
+
+void CastMediaShlib::MediaClockRateRange(double* minimum_rate,
+                                         double* maximum_rate) {}
+
+bool CastMediaShlib::SetMediaClockRate(double new_rate) {
+  return false;
+}
+
+bool CastMediaShlib::SupportsMediaClockRateChange() {
+  return false;
+}
+
 }  // namespace media
 }  // namespace chromecast
diff --git a/chromecast/media/base/cast_media_dummy.cc b/chromecast/media/base/cast_media_dummy.cc
index 52ebd47..3060672 100644
--- a/chromecast/media/base/cast_media_dummy.cc
+++ b/chromecast/media/base/cast_media_dummy.cc
@@ -28,5 +28,24 @@ MediaCodecSupportShlib::CodecSupport MediaCodecSupportShlib::IsSupported(
   return kDefault;
 }
 
+double CastMediaShlib::GetMediaClockRate() {
+  return 0.0;
+}
+
+double CastMediaShlib::MediaClockRatePrecision() {
+  return 0.0;
+}
+
+void CastMediaShlib::MediaClockRateRange(double* minimum_rate,
+                                         double* maximum_rate) {}
+
+bool CastMediaShlib::SetMediaClockRate(double new_rate) {
+  return false;
+}
+
+bool CastMediaShlib::SupportsMediaClockRateChange() {
+  return false;
+}
+
 }  // namespace media
 }  // namespace chromecast
diff --git a/chromecast/public/cast_media_shlib.h b/chromecast/public/cast_media_shlib.h
index 6360aab..ca11f49 100644
--- a/chromecast/public/cast_media_shlib.h
+++ b/chromecast/public/cast_media_shlib.h
@@ -47,6 +47,21 @@ class CHROMECAST_EXPORT CastMediaShlib {
   // MediaPipelineBackend instance.
   static MediaPipelineBackend* CreateMediaPipelineBackend(
       const MediaPipelineDeviceParams& params);
+
+  // Fetches the renderer clock rate (Hz).
+  static double GetMediaClockRate();
+
+  // Fetches the granularity of clock rate adjustments.
+  static double MediaClockRatePrecision();
+
+  // Fetches the possible range of clock rate adjustments.
+  static void MediaClockRateRange(double* minimum_rate, double* maximum_rate);
+
+  // Sets the renderer clock rate (Hz).
+  static bool SetMediaClockRate(double new_rate);
+
+  // Tests if the implementation supports renderer clock rate adjustments.
+  static bool SupportsMediaClockRateChange();
 };
 
 }  // namespace media