1 /*
2 * Copyright (c) 2019 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 "api/audio_codecs/opus/audio_encoder_multi_channel_opus.h"
12
13 #include <utility>
14
15 #include "modules/audio_coding/codecs/opus/audio_encoder_multi_channel_opus_impl.h"
16
17 namespace webrtc {
18
19 absl::optional<AudioEncoderMultiChannelOpusConfig>
SdpToConfig(const SdpAudioFormat & format)20 AudioEncoderMultiChannelOpus::SdpToConfig(const SdpAudioFormat& format) {
21 return AudioEncoderMultiChannelOpusImpl::SdpToConfig(format);
22 }
23
AppendSupportedEncoders(std::vector<AudioCodecSpec> * specs)24 void AudioEncoderMultiChannelOpus::AppendSupportedEncoders(
25 std::vector<AudioCodecSpec>* specs) {
26 // To get full utilization of the surround support of the Opus lib, we can
27 // mark which channel is the low frequency effects (LFE). But that is not done
28 // ATM.
29 {
30 AudioCodecInfo surround_5_1_opus_info{48000, 6,
31 /* default_bitrate_bps= */ 128000};
32 surround_5_1_opus_info.allow_comfort_noise = false;
33 surround_5_1_opus_info.supports_network_adaption = false;
34 SdpAudioFormat opus_format({"multiopus",
35 48000,
36 6,
37 {{"minptime", "10"},
38 {"useinbandfec", "1"},
39 {"channel_mapping", "0,4,1,2,3,5"},
40 {"num_streams", "4"},
41 {"coupled_streams", "2"}}});
42 specs->push_back({std::move(opus_format), surround_5_1_opus_info});
43 }
44 {
45 AudioCodecInfo surround_7_1_opus_info{48000, 8,
46 /* default_bitrate_bps= */ 200000};
47 surround_7_1_opus_info.allow_comfort_noise = false;
48 surround_7_1_opus_info.supports_network_adaption = false;
49 SdpAudioFormat opus_format({"multiopus",
50 48000,
51 8,
52 {{"minptime", "10"},
53 {"useinbandfec", "1"},
54 {"channel_mapping", "0,6,1,2,3,4,5,7"},
55 {"num_streams", "5"},
56 {"coupled_streams", "3"}}});
57 specs->push_back({std::move(opus_format), surround_7_1_opus_info});
58 }
59 }
60
QueryAudioEncoder(const AudioEncoderMultiChannelOpusConfig & config)61 AudioCodecInfo AudioEncoderMultiChannelOpus::QueryAudioEncoder(
62 const AudioEncoderMultiChannelOpusConfig& config) {
63 return AudioEncoderMultiChannelOpusImpl::QueryAudioEncoder(config);
64 }
65
MakeAudioEncoder(const AudioEncoderMultiChannelOpusConfig & config,int payload_type,absl::optional<AudioCodecPairId>)66 std::unique_ptr<AudioEncoder> AudioEncoderMultiChannelOpus::MakeAudioEncoder(
67 const AudioEncoderMultiChannelOpusConfig& config,
68 int payload_type,
69 absl::optional<AudioCodecPairId> /*codec_pair_id*/) {
70 return AudioEncoderMultiChannelOpusImpl::MakeAudioEncoder(config,
71 payload_type);
72 }
73
74 } // namespace webrtc
75