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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_MAIN_ACM2_ACM_CODEC_DATABASE_H_ | |
17 #define WEBRTC_MODULES_AUDIO_CODING_MAIN_ACM2_ACM_CODEC_DATABASE_H_ | |
18 | |
19 #include "webrtc/common_types.h" | |
20 #include "webrtc/engine_configurations.h" | |
21 #include "webrtc/modules/audio_coding/main/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 int 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, int 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_MAIN_ACM2_ACM_CODEC_DATABASE_H_ | |
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