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1 /* | 1 /* |
2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license | 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 | 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 | 6 * tree. An additional intellectual property rights grant can be found |
7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
9 */ | 9 */ |
10 | 10 |
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21 #include "webrtc/base/constructormagic.h" | 21 #include "webrtc/base/constructormagic.h" |
22 #include "webrtc/modules/audio_coding/codecs/audio_decoder.h" | 22 #include "webrtc/modules/audio_coding/codecs/audio_decoder.h" |
23 #include "webrtc/modules/audio_coding/codecs/cng/include/webrtc_cng.h" | 23 #include "webrtc/modules/audio_coding/codecs/cng/include/webrtc_cng.h" |
24 #ifdef WEBRTC_CODEC_G722 | 24 #ifdef WEBRTC_CODEC_G722 |
25 #include "webrtc/modules/audio_coding/codecs/g722/include/g722_interface.h" | 25 #include "webrtc/modules/audio_coding/codecs/g722/include/g722_interface.h" |
26 #endif | 26 #endif |
27 #include "webrtc/typedefs.h" | 27 #include "webrtc/typedefs.h" |
28 | 28 |
29 namespace webrtc { | 29 namespace webrtc { |
30 | 30 |
31 class AudioDecoderPcmU : public AudioDecoder { | |
32 public: | |
33 AudioDecoderPcmU() {} | |
34 void Reset() override; | |
35 int PacketDuration(const uint8_t* encoded, size_t encoded_len) const override; | |
36 size_t Channels() const override; | |
37 | |
38 protected: | |
39 int DecodeInternal(const uint8_t* encoded, | |
40 size_t encoded_len, | |
41 int sample_rate_hz, | |
42 int16_t* decoded, | |
43 SpeechType* speech_type) override; | |
44 | |
45 private: | |
46 RTC_DISALLOW_COPY_AND_ASSIGN(AudioDecoderPcmU); | |
47 }; | |
48 | |
49 class AudioDecoderPcmA : public AudioDecoder { | |
50 public: | |
51 AudioDecoderPcmA() {} | |
52 void Reset() override; | |
53 int PacketDuration(const uint8_t* encoded, size_t encoded_len) const override; | |
54 size_t Channels() const override; | |
55 | |
56 protected: | |
57 int DecodeInternal(const uint8_t* encoded, | |
58 size_t encoded_len, | |
59 int sample_rate_hz, | |
60 int16_t* decoded, | |
61 SpeechType* speech_type) override; | |
62 | |
63 private: | |
64 RTC_DISALLOW_COPY_AND_ASSIGN(AudioDecoderPcmA); | |
65 }; | |
66 | |
67 class AudioDecoderPcmUMultiCh : public AudioDecoderPcmU { | |
68 public: | |
69 explicit AudioDecoderPcmUMultiCh(size_t channels) | |
70 : AudioDecoderPcmU(), channels_(channels) { | |
71 assert(channels > 0); | |
72 } | |
73 size_t Channels() const override; | |
74 | |
75 private: | |
76 const size_t channels_; | |
77 RTC_DISALLOW_COPY_AND_ASSIGN(AudioDecoderPcmUMultiCh); | |
78 }; | |
79 | |
80 class AudioDecoderPcmAMultiCh : public AudioDecoderPcmA { | |
81 public: | |
82 explicit AudioDecoderPcmAMultiCh(size_t channels) | |
83 : AudioDecoderPcmA(), channels_(channels) { | |
84 assert(channels > 0); | |
85 } | |
86 size_t Channels() const override; | |
87 | |
88 private: | |
89 const size_t channels_; | |
90 RTC_DISALLOW_COPY_AND_ASSIGN(AudioDecoderPcmAMultiCh); | |
91 }; | |
92 | |
93 // AudioDecoderCng is a special type of AudioDecoder. It inherits from | 31 // AudioDecoderCng is a special type of AudioDecoder. It inherits from |
94 // AudioDecoder just to fit in the DecoderDatabase. None of the class methods | 32 // AudioDecoder just to fit in the DecoderDatabase. None of the class methods |
95 // should be used, except constructor, destructor, and accessors. | 33 // should be used, except constructor, destructor, and accessors. |
96 // TODO(hlundin): Consider the possibility to create a super-class to | 34 // TODO(hlundin): Consider the possibility to create a super-class to |
97 // AudioDecoder that is stored in DecoderDatabase. Then AudioDecoder and a | 35 // AudioDecoder that is stored in DecoderDatabase. Then AudioDecoder and a |
98 // specific CngDecoder class could both inherit from that class. | 36 // specific CngDecoder class could both inherit from that class. |
99 class AudioDecoderCng : public AudioDecoder { | 37 class AudioDecoderCng : public AudioDecoder { |
100 public: | 38 public: |
101 explicit AudioDecoderCng(); | 39 explicit AudioDecoderCng(); |
102 ~AudioDecoderCng() override; | 40 ~AudioDecoderCng() override; |
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159 // Returns the sample rate for |codec_type|. | 97 // Returns the sample rate for |codec_type|. |
160 int CodecSampleRateHz(NetEqDecoder codec_type); | 98 int CodecSampleRateHz(NetEqDecoder codec_type); |
161 | 99 |
162 // Creates an AudioDecoder object of type |codec_type|. Returns NULL for for | 100 // Creates an AudioDecoder object of type |codec_type|. Returns NULL for for |
163 // unsupported codecs, and when creating an AudioDecoder is not applicable | 101 // unsupported codecs, and when creating an AudioDecoder is not applicable |
164 // (e.g., for RED and DTMF/AVT types). | 102 // (e.g., for RED and DTMF/AVT types). |
165 AudioDecoder* CreateAudioDecoder(NetEqDecoder codec_type); | 103 AudioDecoder* CreateAudioDecoder(NetEqDecoder codec_type); |
166 | 104 |
167 } // namespace webrtc | 105 } // namespace webrtc |
168 #endif // WEBRTC_MODULES_AUDIO_CODING_NETEQ_AUDIO_DECODER_IMPL_H_ | 106 #endif // WEBRTC_MODULES_AUDIO_CODING_NETEQ_AUDIO_DECODER_IMPL_H_ |
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