1syntax = "proto2"; 2option optimize_for = LITE_RUNTIME; 3package webrtc.audioproc; 4 5// Contains the format of input/output/reverse audio. An Init message is added 6// when any of the fields are changed. 7message Init { 8 optional int32 sample_rate = 1; 9 optional int32 device_sample_rate = 2 [deprecated=true]; 10 optional int32 num_input_channels = 3; 11 optional int32 num_output_channels = 4; 12 optional int32 num_reverse_channels = 5; 13 optional int32 reverse_sample_rate = 6; 14 optional int32 output_sample_rate = 7; 15 optional int32 reverse_output_sample_rate = 8; 16 optional int32 num_reverse_output_channels = 9; 17} 18 19// May contain interleaved or deinterleaved data, but don't store both formats. 20message ReverseStream { 21 // int16 interleaved data. 22 optional bytes data = 1; 23 24 // float deinterleaved data, where each repeated element points to a single 25 // channel buffer of data. 26 repeated bytes channel = 2; 27} 28 29// May contain interleaved or deinterleaved data, but don't store both formats. 30message Stream { 31 // int16 interleaved data. 32 optional bytes input_data = 1; 33 optional bytes output_data = 2; 34 35 optional int32 delay = 3; 36 optional sint32 drift = 4; 37 optional int32 level = 5; 38 optional bool keypress = 6; 39 40 // float deinterleaved data, where each repeated element points to a single 41 // channel buffer of data. 42 repeated bytes input_channel = 7; 43 repeated bytes output_channel = 8; 44} 45 46// Contains the configurations of various APM component. A Config message is 47// added when any of the fields are changed. 48message Config { 49 // Next field number 19. 50 // Acoustic echo canceler. 51 optional bool aec_enabled = 1; 52 optional bool aec_delay_agnostic_enabled = 2; 53 optional bool aec_drift_compensation_enabled = 3; 54 optional bool aec_extended_filter_enabled = 4; 55 optional int32 aec_suppression_level = 5; 56 // Mobile AEC. 57 optional bool aecm_enabled = 6; 58 optional bool aecm_comfort_noise_enabled = 7; 59 optional int32 aecm_routing_mode = 8; 60 // Automatic gain controller. 61 optional bool agc_enabled = 9; 62 optional int32 agc_mode = 10; 63 optional bool agc_limiter_enabled = 11; 64 optional bool noise_robust_agc_enabled = 12; 65 // High pass filter. 66 optional bool hpf_enabled = 13; 67 // Noise suppression. 68 optional bool ns_enabled = 14; 69 optional int32 ns_level = 15; 70 // Transient suppression. 71 optional bool transient_suppression_enabled = 16; 72 // Semicolon-separated string containing experimental feature 73 // descriptions. 74 optional string experiments_description = 17; 75 // Intelligibility Enhancer 76 optional bool intelligibility_enhancer_enabled = 18; 77} 78 79message Event { 80 enum Type { 81 INIT = 0; 82 REVERSE_STREAM = 1; 83 STREAM = 2; 84 CONFIG = 3; 85 UNKNOWN_EVENT = 4; 86 } 87 88 required Type type = 1; 89 90 optional Init init = 2; 91 optional ReverseStream reverse_stream = 3; 92 optional Stream stream = 4; 93 optional Config config = 5; 94} 95