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
97AudioCoding* AudioCoding::Create(const Config& config) {
98  return new AudioCodingImpl(config);
99}
100
101}  // namespace webrtc
102