VideoCapture: add support for GpuMemoryBuffer allocation and lifetime mgmt in VideoCaptureBufferPool

media/base/video_capture_types.cc

Index: media/base/video_capture_types.cc
diff --git a/media/base/video_capture_types.cc b/media/base/video_capture_types.cc
index 1528017456a35c43dde6abe8ee752c2e8a4156d6..b9e3aa78a7eed73e987711c3507a5c72d7d6b883 100644
--- a/media/base/video_capture_types.cc
+++ b/media/base/video_capture_types.cc
@@ -49,6 +49,7 @@ size_t VideoCaptureFormat::ImageAllocationSize() const {
       break;
     case PIXEL_FORMAT_RGB32:
     case PIXEL_FORMAT_ARGB:
+    case PIXEL_FORMAT_GPUMEMORYBUFFER:
       result_frame_size *= 4;
       break;
     case PIXEL_FORMAT_MJPEG:
@@ -95,6 +96,8 @@ std::string VideoCaptureFormat::PixelFormatToString(VideoPixelFormat format) {
     return "YV12";
   case PIXEL_FORMAT_TEXTURE:
     return "TEXTURE";
+  case PIXEL_FORMAT_GPUMEMORYBUFFER:

[miu, 2015/04/15 19:12:40]

This isn't a pixel format (and neither is TEXTURE), unless GPUMEMORYBUFFER is
guaranteed to always be ARGB format.  If that's the case, it should be
documented in a comment here.

BTW--Most graphics cards/drivers are optimized for BGRA, so consider leaving
open the option for using it.

[mcasas, 2015/04/16 03:11:22]

Done.

+    return "GPUMEMORYBUFFER";
   case PIXEL_FORMAT_MAX:
     break;
   }