Add support for color formats negotiation.

content/common/gpu/media/android_video_encode_accelerator.cc

Index: content/common/gpu/media/android_video_encode_accelerator.cc
diff --git a/content/common/gpu/media/android_video_encode_accelerator.cc b/content/common/gpu/media/android_video_encode_accelerator.cc
index 2507ea41c1f9b3c6782adc3681186827433da991..e648eb6e36bc93e913a7ef028d89f58f8afe7735 100644
--- a/content/common/gpu/media/android_video_encode_accelerator.cc
+++ b/content/common/gpu/media/android_video_encode_accelerator.cc
@@ -4,6 +4,8 @@
 
 #include "content/common/gpu/media/android_video_encode_accelerator.h"
 
+#include <set>
+
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/logging.h"
@@ -26,9 +28,11 @@ using media::VideoFrame;
 
 namespace content {
 
-enum {
+enum PixelFormat {
   // Subset of MediaCodecInfo.CodecCapabilities.
+  COLOR_FORMAT_YUV420_PLANAR = 19,
   COLOR_FORMAT_YUV420_SEMIPLANAR = 21,
+  COLOR_FORMAT_UNKNOWN,

[xhwang, 2014/10/15 04:15:45]

This is confusing because value "22" is a valid one in:

http://developer.android.com/reference/android/media/MediaCodecInfo.CodecCapa...

How about let GetSupportedColorFormatForMime return a boolean, and provide an
output param for PixelFormat?

[changbin, 2014/10/15 07:00:37]

Done.

 };
 
 // Helper macros for dealing with failure.  If |result| evaluates false, emit
@@ -67,6 +71,15 @@ static inline const base::TimeDelta NoWaitTimeOut() {
   return base::TimeDelta::FromMicroseconds(0);
 }
 
+static PixelFormat GetSupportedColorFormatForMime(const std::string& mime) {
+  std::set<int> formats = MediaCodecBridge::GetEncoderColorFormats(mime);
+  if (formats.find(COLOR_FORMAT_YUV420_SEMIPLANAR) != formats.end())
+    return COLOR_FORMAT_YUV420_SEMIPLANAR;
+  if (formats.find(COLOR_FORMAT_YUV420_PLANAR) != formats.end())
+    return COLOR_FORMAT_YUV420_PLANAR;
+  return COLOR_FORMAT_UNKNOWN;
+}
+
 AndroidVideoEncodeAccelerator::AndroidVideoEncodeAccelerator()
     : num_buffers_at_codec_(0),
       num_output_buffers_(-1),
@@ -142,17 +155,16 @@ bool AndroidVideoEncodeAccelerator::Initialize(
     return false;
   }
 
-  // TODO(fischman): when there is more HW out there with different color-space
-  // support, this should turn into a negotiation with the codec for supported
-  // formats.  For now we use the only format supported by the only available
-  // HW.
-  media_codec_.reset(
-      media::VideoCodecBridge::CreateEncoder(media::kCodecVP8,
-                                             input_visible_size,
-                                             initial_bitrate,
-                                             INITIAL_FRAMERATE,
-                                             IFRAME_INTERVAL,
-                                             COLOR_FORMAT_YUV420_SEMIPLANAR));
+  PixelFormat pixel_format =
+      GetSupportedColorFormatForMime("video/x-vnd.on2.vp8");
+  if (pixel_format == COLOR_FORMAT_UNKNOWN)
+    return false;
+  media_codec_.reset(media::VideoCodecBridge::CreateEncoder(media::kCodecVP8,
+                                                            input_visible_size,
+                                                            initial_bitrate,
+                                                            INITIAL_FRAMERATE,
+                                                            IFRAME_INTERVAL,
+                                                            pixel_format));
 
   if (!media_codec_) {
     DLOG(ERROR) << "Failed to create/start the codec: "