Implement device enumeration for PPB_VideoCapture_Dev.

ppapi/c/dev/ppb_video_capture_dev.h

Index: ppapi/c/dev/ppb_video_capture_dev.h
diff --git a/ppapi/c/dev/ppb_video_capture_dev.h b/ppapi/c/dev/ppb_video_capture_dev.h
index 396879c5777484656a778fb216ebe63db7955ce3..3c35d507ad134a97e062d6117831dae869aada59 100644
--- a/ppapi/c/dev/ppb_video_capture_dev.h
+++ b/ppapi/c/dev/ppb_video_capture_dev.h
@@ -3,20 +3,22 @@
  * found in the LICENSE file.
  */
 
-/* From dev/ppb_video_capture_dev.idl modified Tue Oct 11 10:01:39 2011. */
+/* From dev/ppb_video_capture_dev.idl modified Thu Jan 26 11:39:48 2012. */
 
 #ifndef PPAPI_C_DEV_PPB_VIDEO_CAPTURE_DEV_H_
 #define PPAPI_C_DEV_PPB_VIDEO_CAPTURE_DEV_H_
 
 #include "ppapi/c/dev/pp_video_capture_dev.h"
 #include "ppapi/c/pp_bool.h"
+#include "ppapi/c/pp_completion_callback.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/c/pp_macros.h"
 #include "ppapi/c/pp_resource.h"
 #include "ppapi/c/pp_stdint.h"
 
 #define PPB_VIDEOCAPTURE_DEV_INTERFACE_0_1 "PPB_VideoCapture(Dev);0.1"
-#define PPB_VIDEOCAPTURE_DEV_INTERFACE PPB_VIDEOCAPTURE_DEV_INTERFACE_0_1
+#define PPB_VIDEOCAPTURE_DEV_INTERFACE_0_2 "PPB_VideoCapture(Dev);0.2"
+#define PPB_VIDEOCAPTURE_DEV_INTERFACE PPB_VIDEOCAPTURE_DEV_INTERFACE_0_2
 
 /**
  * @file
@@ -53,7 +55,7 @@
  * 4:2:0, one byte per pixel, tightly packed (width x height Y values, then
  * width/2 x height/2 U values, then width/2 x height/2 V values).
  */
-struct PPB_VideoCapture_Dev_0_1 {
+struct PPB_VideoCapture_Dev_0_2 {
   /**
    * Creates a new VideoCapture.
    */
@@ -63,20 +65,35 @@ struct PPB_VideoCapture_Dev_0_1 {
    */
   PP_Bool (*IsVideoCapture)(PP_Resource video_capture);
   /**
-   * Starts the capture. |requested_info| is a pointer to a structure containing
-   * the requested resolution and frame rate. |buffer_count| is the number of
-   * buffers requested by the plugin. Note: it is only used as advisory, the
-   * browser may allocate more of fewer based on available resources.
-   * How many buffers depends on usage. At least 2 to make sure latency doesn't
-   * cause lost frames. If the plugin expects to hold on to more than one buffer
-   * at a time (e.g. to do multi-frame processing, like video encoding), it
-   * should request that many more.
+   * Enumerates video capture devices. Once the operation is completed
+   * successfully. |GetDevices()| can be used to retrieve the devices.
+   */
+  int32_t (*EnumerateDevices)(PP_Resource video_capture,
+                              struct PP_CompletionCallback callback);
+  /**
+   * Gets video capture devices. The returned value is a PPB_ResourceArray_Dev
+   * resource if successful, which holds a list of PPB_DeviceRef_Dev resources.
+   */
+  PP_Resource (*GetDevices)(PP_Resource video_capture);
+  /**
+   * Starts the capture. |device_ref| identifies a video capture device. It
+   * could be one of the resource in the array returned by |GetDevices()|, or 0
+   * which means the default device.
+   * |requested_info| is a pointer to a structure containing the requested
+   * resolution and frame rate. |buffer_count| is the number of buffers
+   * requested by the plugin. Note: it is only used as advisory, the browser may
+   * allocate more or fewer based on available resources. How many buffers
+   * depends on usage. At least 2 to make sure latency doesn't cause lost
+   * frames. If the plugin expects to hold on to more than one buffer at a time
+   * (e.g. to do multi-frame processing, like video encoding), it should request
+   * that many more.
    *
    * Returns PP_ERROR_FAILED if called when the capture was already started, or
    * PP_OK on success.
    */
   int32_t (*StartCapture)(
       PP_Resource video_capture,
+      PP_Resource device_ref,
       const struct PP_VideoCaptureDeviceInfo_Dev* requested_info,
       uint32_t buffer_count);
   /**
@@ -98,7 +115,18 @@ struct PPB_VideoCapture_Dev_0_1 {
   int32_t (*StopCapture)(PP_Resource video_capture);
 };
 
-typedef struct PPB_VideoCapture_Dev_0_1 PPB_VideoCapture_Dev;
+typedef struct PPB_VideoCapture_Dev_0_2 PPB_VideoCapture_Dev;
+
+struct PPB_VideoCapture_Dev_0_1 {
+  PP_Resource (*Create)(PP_Instance instance);
+  PP_Bool (*IsVideoCapture)(PP_Resource video_capture);
+  int32_t (*StartCapture)(
+      PP_Resource video_capture,
+      const struct PP_VideoCaptureDeviceInfo_Dev* requested_info,
+      uint32_t buffer_count);
+  int32_t (*ReuseBuffer)(PP_Resource video_capture, uint32_t buffer);
+  int32_t (*StopCapture)(PP_Resource video_capture);
+};
 /**
  * @}
  */