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 /* 12 * This file generates databases with information about all supported audio 13 * codecs. 14 */ 15 16 #ifndef WEBRTC_MODULES_AUDIO_CODING_ACM2_ACM_CODEC_DATABASE_H_ 17 #define WEBRTC_MODULES_AUDIO_CODING_ACM2_ACM_CODEC_DATABASE_H_ 18 19 #include "webrtc/common_types.h" 20 #include "webrtc/engine_configurations.h" 21 #include "webrtc/modules/audio_coding/acm2/rent_a_codec.h" 22 #include "webrtc/modules/audio_coding/neteq/include/neteq.h" 23 24 namespace webrtc { 25 26 namespace acm2 { 27 28 // TODO(tlegrand): replace class ACMCodecDB with a namespace. 29 class ACMCodecDB { 30 public: 31 // kMaxNumCodecs - Maximum number of codecs that can be activated in one 32 // build. 33 // kMaxNumPacketSize - Maximum number of allowed packet sizes for one codec. 34 // These might need to be increased if adding a new codec to the database 35 static const int kMaxNumCodecs = 50; 36 static const int kMaxNumPacketSize = 6; 37 38 // Codec specific settings 39 // 40 // num_packet_sizes - number of allowed packet sizes. 41 // packet_sizes_samples - list of the allowed packet sizes. 42 // basic_block_samples - assigned a value different from 0 if the codec 43 // requires to be fed with a specific number of samples 44 // that can be different from packet size. 45 // channel_support - number of channels supported to encode; 46 // 1 = mono, 2 = stereo, etc. 47 struct CodecSettings { 48 int num_packet_sizes; 49 int packet_sizes_samples[kMaxNumPacketSize]; 50 int basic_block_samples; 51 size_t channel_support; 52 }; 53 54 // Returns codec id from database, given the information received in the input 55 // [codec_inst]. 56 // Input: 57 // [codec_inst] - Information about the codec for which we require the 58 // database id. 59 // Return: 60 // codec id if successful, otherwise < 0. 61 static int CodecNumber(const CodecInst& codec_inst); 62 static int CodecId(const CodecInst& codec_inst); 63 static int CodecId(const char* payload_name, int frequency, size_t channels); 64 static int ReceiverCodecNumber(const CodecInst& codec_inst); 65 66 // Databases with information about the supported codecs 67 // database_ - stored information about all codecs: payload type, name, 68 // sampling frequency, packet size in samples, default channel 69 // support, and default rate. 70 // codec_settings_ - stored codec settings: number of allowed packet sizes, 71 // a vector with the allowed packet sizes, basic block 72 // samples, and max number of channels that are supported. 73 // neteq_decoders_ - list of supported decoders in NetEQ. 74 static const CodecInst database_[kMaxNumCodecs]; 75 static const CodecSettings codec_settings_[kMaxNumCodecs]; 76 static const NetEqDecoder neteq_decoders_[kMaxNumCodecs]; 77 }; 78 79 } // namespace acm2 80 81 } // namespace webrtc 82 83 #endif // WEBRTC_MODULES_AUDIO_CODING_ACM2_ACM_CODEC_DATABASE_H_ 84