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+syntax = "proto2";
+option optimize_for = LITE_RUNTIME;
+package webrtc.audioproc;
+
+// Contains the format of input/output/reverse audio. An Init message is added
+// when any of the fields are changed.
+message Init {
+ optional int32 sample_rate = 1;
+ optional int32 device_sample_rate = 2 [deprecated=true];
+ optional int32 num_input_channels = 3;
+ optional int32 num_output_channels = 4;
+ optional int32 num_reverse_channels = 5;
+ optional int32 reverse_sample_rate = 6;
+ optional int32 output_sample_rate = 7;
+ optional int32 reverse_output_sample_rate = 8;
+ optional int32 num_reverse_output_channels = 9;
+ optional int64 timestamp_ms = 10;
+}
+
+// May contain interleaved or deinterleaved data, but don't store both formats.
+message ReverseStream {
+ // int16 interleaved data.
+ optional bytes data = 1;
+
+ // float deinterleaved data, where each repeated element points to a single
+ // channel buffer of data.
+ repeated bytes channel = 2;
+}
+
+// May contain interleaved or deinterleaved data, but don't store both formats.
+message Stream {
+ // int16 interleaved data.
+ optional bytes input_data = 1;
+ optional bytes output_data = 2;
+
+ optional int32 delay = 3;
+ optional sint32 drift = 4;
+ optional int32 applied_input_volume = 5;
+ optional bool keypress = 6;
+
+ // float deinterleaved data, where each repeated element points to a single
+ // channel buffer of data.
+ repeated bytes input_channel = 7;
+ repeated bytes output_channel = 8;
+}
+
+// Contains the configurations of various APM component. A Config message is
+// added when any of the fields are changed.
+message Config {
+ // Acoustic echo canceler.
+ optional bool aec_enabled = 1;
+ optional bool aec_delay_agnostic_enabled = 2;
+ optional bool aec_drift_compensation_enabled = 3;
+ optional bool aec_extended_filter_enabled = 4;
+ optional int32 aec_suppression_level = 5;
+ // Mobile AEC.
+ optional bool aecm_enabled = 6;
+ optional bool aecm_comfort_noise_enabled = 7 [deprecated = true];
+ optional int32 aecm_routing_mode = 8 [deprecated = true];
+ // Automatic gain controller.
+ optional bool agc_enabled = 9;
+ optional int32 agc_mode = 10;
+ optional bool agc_limiter_enabled = 11;
+ optional bool noise_robust_agc_enabled = 12;
+ // High pass filter.
+ optional bool hpf_enabled = 13;
+ // Noise suppression.
+ optional bool ns_enabled = 14;
+ optional int32 ns_level = 15;
+ // Transient suppression.
+ optional bool transient_suppression_enabled = 16;
+ // Semicolon-separated string containing experimental feature
+ // descriptions.
+ optional string experiments_description = 17;
+ reserved 18; // Intelligibility enhancer enabled (deprecated).
+ // Pre amplifier.
+ optional bool pre_amplifier_enabled = 19;
+ optional float pre_amplifier_fixed_gain_factor = 20;
+
+ // Next field number 21.
+}
+
+message PlayoutAudioDeviceInfo {
+ optional int32 id = 1;
+ optional int32 max_volume = 2;
+}
+
+message RuntimeSetting {
+ optional float capture_pre_gain = 1;
+ optional float custom_render_processing_setting = 2;
+ optional float capture_fixed_post_gain = 3;
+ optional int32 playout_volume_change = 4;
+ optional PlayoutAudioDeviceInfo playout_audio_device_change = 5;
+ optional bool capture_output_used = 6;
+ optional float capture_post_gain = 7;
+}
+
+message Event {
+ enum Type {
+ INIT = 0;
+ REVERSE_STREAM = 1;
+ STREAM = 2;
+ CONFIG = 3;
+ UNKNOWN_EVENT = 4;
+ RUNTIME_SETTING = 5;
+ }
+
+ required Type type = 1;
+
+ optional Init init = 2;
+ optional ReverseStream reverse_stream = 3;
+ optional Stream stream = 4;
+ optional Config config = 5;
+ optional RuntimeSetting runtime_setting = 6;
+}