ppapi: define PPB_AudioEncoder 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,
   PP_VIDEOPROFILE_H264MAIN = 1,
   PP_VIDEOPROFILE_H264EXTENDED = 2,
   PP_VIDEOPROFILE_H264HIGH = 3,
   PP_VIDEOPROFILE_H264HIGH10PROFILE = 4,
   PP_VIDEOPROFILE_H264HIGH422PROFILE = 5,
   PP_VIDEOPROFILE_H264HIGH444PREDICTIVEPROFILE = 6,
   PP_VIDEOPROFILE_H264SCALABLEBASELINE = 7,
   PP_VIDEOPROFILE_H264SCALABLEHIGH = 8,
   PP_VIDEOPROFILE_H264STEREOHIGH = 9,
   PP_VIDEOPROFILE_H264MULTIVIEWHIGH = 10,
   PP_VIDEOPROFILE_VP8_ANY = 11,
   PP_VIDEOPROFILE_VP9_ANY = 12,
   PP_VIDEOPROFILE_MAX = PP_VIDEOPROFILE_VP9_ANY
 };
 
 /**
+ * Audio profiles.
+ */
+enum PP_AudioProfile {
+  PP_AUDIOPROFILE_OPUS = 0,
+  PP_AUDIOPROFILE_SPEEX = 1,
+  PP_AUDIOPROFILE_MAX = PP_AUDIOPROFILE_SPEEX

[bbudge, 2015/06/09 17:29:41]

Is it possible to support AAC? This is very useful for developers, since they
can use Chrome's built-in support rather than deal with the licensing issues if
they build encoding into their plugin.

[llandwerlin-old, 2015/06/10 09:06:19]

It's possible to support AAC, although it seems chromium does not embeds an AAC
encoder.
It relies on the system's libraries, the only platforms that support it are
MacOSX and Android.

[bbudge, 2015/09/04 16:26:50]

OK.

+};
+
+/**
  * Hardware acceleration options.
  */
 enum PP_HardwareAcceleration {
   /** Create a hardware accelerated resource only. */
   PP_HARDWAREACCELERATION_ONLY = 0,
 
   /**
    * Create a hardware accelerated resource if possible. Otherwise, fall back
    * to the software implementation.
    */
@@ skipping 136 matching lines @@
   uint32_t max_framerate_denominator;
 
   /**
    * A value indicating if the profile is available in hardware, software, or
    * both.
    */
   PP_HardwareAcceleration acceleration;
 };
 
 /**
+ * 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 {
   /**
    * 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;
 };
+
+/**
+ * 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;
+};