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Side by Side Diff: webrtc/modules/audio_coding/codecs/audio_format.h

Issue 2668523004: Move AudioDecoder and related stuff to the api/ directory (Closed)
Patch Set: more review fixes Created 3 years, 10 months ago
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1 /*
2 * Copyright (c) 2016 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 #ifndef WEBRTC_MODULES_AUDIO_CODING_CODECS_AUDIO_FORMAT_H_
12 #define WEBRTC_MODULES_AUDIO_CODING_CODECS_AUDIO_FORMAT_H_
13
14 #include <map>
15 #include <ostream>
16 #include <string>
17 #include <utility>
18
19 namespace webrtc {
20
21 // SDP specification for a single audio codec.
22 // NOTE: This class is still under development and may change without notice.
23 struct SdpAudioFormat {
24 using Parameters = std::map<std::string, std::string>;
25
26 SdpAudioFormat(const SdpAudioFormat&);
27 SdpAudioFormat(SdpAudioFormat&&);
28 SdpAudioFormat(const char* name, int clockrate_hz, int num_channels);
29 SdpAudioFormat(const std::string& name, int clockrate_hz, int num_channels);
30 SdpAudioFormat(const char* name,
31 int clockrate_hz,
32 int num_channels,
33 const Parameters& param);
34 SdpAudioFormat(const std::string& name,
35 int clockrate_hz,
36 int num_channels,
37 const Parameters& param);
38 ~SdpAudioFormat();
39
40 SdpAudioFormat& operator=(const SdpAudioFormat&);
41 SdpAudioFormat& operator=(SdpAudioFormat&&);
42
43 friend bool operator==(const SdpAudioFormat& a, const SdpAudioFormat& b);
44 friend bool operator!=(const SdpAudioFormat& a, const SdpAudioFormat& b) {
45 return !(a == b);
46 }
47
48 std::string name;
49 int clockrate_hz;
50 int num_channels;
51 Parameters parameters;
52 };
53
54 void swap(SdpAudioFormat& a, SdpAudioFormat& b);
55 std::ostream& operator<<(std::ostream& os, const SdpAudioFormat& saf);
56
57 // To avoid API breakage, and make the code clearer, AudioCodecSpec should not
58 // be directly initializable with any flags indicating optional support. If it
59 // were, these initializers would break any time a new flag was added. It's also
60 // more difficult to understand:
61 // AudioCodecSpec spec{{"format", 8000, 1}, true, false, false, true, true};
62 // than
63 // AudioCodecSpec spec({"format", 8000, 1});
64 // spec.allow_comfort_noise = true;
65 // spec.future_flag_b = true;
66 // spec.future_flag_c = true;
67 struct AudioCodecSpec {
68 explicit AudioCodecSpec(const SdpAudioFormat& format);
69 explicit AudioCodecSpec(SdpAudioFormat&& format);
70 ~AudioCodecSpec() = default;
71
72 SdpAudioFormat format;
73 bool allow_comfort_noise = true; // This codec can be used with an external
74 // comfort noise generator.
75 bool supports_network_adaption = false; // This codec can adapt to varying
76 // network conditions.
77 };
78
79 } // namespace webrtc
80
81 #endif // WEBRTC_MODULES_AUDIO_CODING_CODECS_AUDIO_FORMAT_H_
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