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1 /* | |
2 * Copyright (c) 2015 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_G722_INCLUDE_AUDIO_DECODER_G722_H_ | |
12 #define WEBRTC_MODULES_AUDIO_CODING_CODECS_G722_INCLUDE_AUDIO_DECODER_G722_H_ | |
13 | |
14 #include "webrtc/modules/audio_coding/codecs/audio_decoder.h" | |
15 | |
16 typedef struct WebRtcG722DecInst G722DecInst; | |
17 | |
18 namespace webrtc { | |
19 | |
20 class AudioDecoderG722 final : public AudioDecoder { | |
21 public: | |
22 AudioDecoderG722(); | |
23 ~AudioDecoderG722() override; | |
24 bool HasDecodePlc() const override; | |
25 void Reset() override; | |
26 int PacketDuration(const uint8_t* encoded, size_t encoded_len) const override; | |
27 size_t Channels() const override; | |
28 | |
29 protected: | |
30 int DecodeInternal(const uint8_t* encoded, | |
31 size_t encoded_len, | |
32 int sample_rate_hz, | |
33 int16_t* decoded, | |
34 SpeechType* speech_type) override; | |
35 | |
36 private: | |
37 G722DecInst* dec_state_; | |
38 RTC_DISALLOW_COPY_AND_ASSIGN(AudioDecoderG722); | |
39 }; | |
40 | |
41 class AudioDecoderG722Stereo final : public AudioDecoder { | |
42 public: | |
43 AudioDecoderG722Stereo(); | |
44 ~AudioDecoderG722Stereo() override; | |
45 void Reset() override; | |
46 | |
47 protected: | |
48 int DecodeInternal(const uint8_t* encoded, | |
49 size_t encoded_len, | |
50 int sample_rate_hz, | |
51 int16_t* decoded, | |
52 SpeechType* speech_type) override; | |
53 size_t Channels() const override; | |
54 | |
55 private: | |
56 // Splits the stereo-interleaved payload in |encoded| into separate payloads | |
57 // for left and right channels. The separated payloads are written to | |
58 // |encoded_deinterleaved|, which must hold at least |encoded_len| samples. | |
59 // The left channel starts at offset 0, while the right channel starts at | |
60 // offset encoded_len / 2 into |encoded_deinterleaved|. | |
61 void SplitStereoPacket(const uint8_t* encoded, | |
62 size_t encoded_len, | |
63 uint8_t* encoded_deinterleaved); | |
64 | |
65 G722DecInst* dec_state_left_; | |
66 G722DecInst* dec_state_right_; | |
67 RTC_DISALLOW_COPY_AND_ASSIGN(AudioDecoderG722Stereo); | |
68 }; | |
69 | |
70 } // namespace webrtc | |
71 | |
72 #endif // WEBRTC_MODULES_AUDIO_CODING_CODECS_G722_INCLUDE_AUDIO_DECODER_G722_H_ | |
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