1/* 2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11#include "webrtc/modules/audio_coding/main/interface/audio_coding_module.h" 12 13#include "webrtc/common_types.h" 14#include "webrtc/modules/audio_coding/main/acm2/acm_codec_database.h" 15#include "webrtc/modules/audio_coding/main/acm2/audio_coding_module_impl.h" 16#include "webrtc/system_wrappers/interface/clock.h" 17#include "webrtc/system_wrappers/interface/trace.h" 18 19namespace webrtc { 20 21// Create module 22AudioCodingModule* AudioCodingModule::Create(int id) { 23 return Create(id, Clock::GetRealTimeClock()); 24} 25 26AudioCodingModule* AudioCodingModule::Create(int id, Clock* clock) { 27 AudioCodingModule::Config config; 28 config.id = id; 29 config.clock = clock; 30 return new acm2::AudioCodingModuleImpl(config); 31} 32 33// Get number of supported codecs 34int AudioCodingModule::NumberOfCodecs() { 35 return acm2::ACMCodecDB::kNumCodecs; 36} 37 38// Get supported codec parameters with id 39int AudioCodingModule::Codec(int list_id, CodecInst* codec) { 40 // Get the codec settings for the codec with the given list ID 41 return acm2::ACMCodecDB::Codec(list_id, codec); 42} 43 44// Get supported codec parameters with name, frequency and number of channels. 45int AudioCodingModule::Codec(const char* payload_name, 46 CodecInst* codec, 47 int sampling_freq_hz, 48 int channels) { 49 int codec_id; 50 51 // Get the id of the codec from the database. 52 codec_id = acm2::ACMCodecDB::CodecId( 53 payload_name, sampling_freq_hz, channels); 54 if (codec_id < 0) { 55 // We couldn't find a matching codec, set the parameters to unacceptable 56 // values and return. 57 codec->plname[0] = '\0'; 58 codec->pltype = -1; 59 codec->pacsize = 0; 60 codec->rate = 0; 61 codec->plfreq = 0; 62 return -1; 63 } 64 65 // Get default codec settings. 66 acm2::ACMCodecDB::Codec(codec_id, codec); 67 68 // Keep the number of channels from the function call. For most codecs it 69 // will be the same value as in default codec settings, but not for all. 70 codec->channels = channels; 71 72 return 0; 73} 74 75// Get supported codec Index with name, frequency and number of channels. 76int AudioCodingModule::Codec(const char* payload_name, 77 int sampling_freq_hz, 78 int channels) { 79 return acm2::ACMCodecDB::CodecId(payload_name, sampling_freq_hz, channels); 80} 81 82// Checks the validity of the parameters of the given codec 83bool AudioCodingModule::IsCodecValid(const CodecInst& codec) { 84 int mirror_id; 85 86 int codec_number = acm2::ACMCodecDB::CodecNumber(codec, &mirror_id); 87 88 if (codec_number < 0) { 89 WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, -1, 90 "Invalid codec setting"); 91 return false; 92 } else { 93 return true; 94 } 95} 96 97} // namespace webrtc 98