Pepper: Define PPB_VideoEncoder API.

ppapi/api/pp_codecs.idl

 /* Copyright (c) 2014 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 /**
  * Video profiles.
  */
 enum PP_VideoProfile {
   PP_VIDEOPROFILE_H264BASELINE = 0,
@@ skipping 97 matching lines @@
    *
    * The pixel format of the texture is GL_RGBA.
    */
   uint32_t texture_target;
 
   /**
    * Dimensions of the texture holding the decoded picture.
    */
   PP_Size texture_size;
 };
+
+/**
+ * Supported video profile information. See the PPB_VideoEncoder function
+ * GetSupportedProfiles() for more details.
+ */
+struct PP_SupportedVideoProfile {
+  /**
+   * The codec profile.
+   */
+  PP_VideoProfile profile;
+
+  /**
+   * Dimensions of the maximum resolution of video frames, in pixels.
+   */
+  PP_Size max_resolution;
+
+  /**
+   * The numerator of the maximum frame rate.
+   */
+  uint32_t max_framerate_numerator;

[dmichael (off chromium), 2015/02/03 23:26:07]

Why a fraction? Would a float or double suffice?

I notice that Android uses a float or integer...
http://developer.android.com/reference/android/media/MediaFormat.html#KEY_FRA...

[bbudge, 2015/02/04 13:56:40]

This is copied from the VEA interface. I think it's the correct way to specify
frame rate because the encoder uses exact arithmetic internally, and floats or
even doubles can't represent these ratios well.
See: http://avisynth.nl/index.php/FPS

+
+  /**
+   * The denominator of the maximum frame rate.
+   */
+  uint32_t max_framerate_denominator;
+
+  /**
+   * A value indicating if the profile is available in hardware, software, or
+   * both.
+   */
+  PP_HardwareAcceleration acceleration;
+};
+
+/**
+ * Struct describing a bitstream buffer.
+ */
+struct PP_BitstreamBuffer {
+  /**
+   * The size, in bytes, of the bitstream data.
+   */
+  uint32_t size;
+
+  /**
+   * The base address of the bitstream data.
+   */
+  mem_t buffer;
+
+  /**
+   * Whether the buffer represents a key frame.
+   */
+  PP_Bool key_frame;
+};
+