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
19 namespace webrtc {
20
21 // Create module
Create(int id)22 AudioCodingModule* AudioCodingModule::Create(int id) {
23 return Create(id, Clock::GetRealTimeClock());
24 }
25
Create(int id,Clock * clock)26 AudioCodingModule* 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
NumberOfCodecs()34 int AudioCodingModule::NumberOfCodecs() {
35 return acm2::ACMCodecDB::kNumCodecs;
36 }
37
38 // Get supported codec parameters with id
Codec(int list_id,CodecInst * codec)39 int 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.
Codec(const char * payload_name,CodecInst * codec,int sampling_freq_hz,int channels)45 int 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.
Codec(const char * payload_name,int sampling_freq_hz,int channels)76 int 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
IsCodecValid(const CodecInst & codec)83 bool 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