ppapi: implement PPB_AudioEncoder

ppapi/api/pp_codecs.idl

Index: ppapi/api/pp_codecs.idl
diff --git a/ppapi/api/pp_codecs.idl b/ppapi/api/pp_codecs.idl
index 89642a9adce32f27a93bf3b8c84f4aaa3e98fb27..2bf47afaaf99ec2dfae84e28364d3ac2af075b5c 100644
--- a/ppapi/api/pp_codecs.idl
+++ b/ppapi/api/pp_codecs.idl
@@ -24,6 +24,15 @@ enum PP_VideoProfile {
 };
 
 /**
+ * Audio profiles.
+ */
+enum PP_AudioProfile {
+  PP_AUDIOPROFILE_OPUS = 0,
+  PP_AUDIOPROFILE_SPEEX = 1,
+  PP_AUDIOPROFILE_MAX = PP_AUDIOPROFILE_SPEEX
+};
+
+/**
  * Hardware acceleration options.
  */
 enum PP_HardwareAcceleration {
@@ -180,6 +189,37 @@ struct PP_VideoProfileDescription_0_1 {
 };
 
 /**
+ * Supported audio profile information. See the PPB_AudioEncoder function
+ * GetSupportedProfiles() for more details.
+ */
+struct PP_AudioProfileDescription {
+  /**
+   * The codec profile.
+   */
+  PP_AudioProfile profile;
+
+  /**
+   * Maximum number of channels that can be encoded.
+   */
+  uint32_t max_channels;
+
+  /**
+   * Sample size.
+   */
+  uint32_t sample_size;
+
+  /**
+   * Sampling rate that can be encoded
+   */
+  uint32_t sample_rate;
+
+  /**
+   * Whether the profile is hardware accelerated.
+   */
+  PP_Bool hardware_accelerated;
+};
+
+/**
  * Struct describing a bitstream buffer.
  */
 struct PP_BitstreamBuffer {
@@ -198,3 +238,18 @@ struct PP_BitstreamBuffer {
    */
   PP_Bool key_frame;
 };
+
+/**
+ * Struct describing an audio bitstream buffer.
+ */
+struct PP_AudioBitstreamBuffer {
+  /**
+   * The size, in bytes, of the bitstream data.
+   */
+  uint32_t size;
+
+  /**
+   * The base address of the bitstream data.
+   */
+  mem_t buffer;
+};