1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
/*
* Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef MODULES_AUDIO_CODING_CODECS_G722_AUDIO_DECODER_G722_H_
#define MODULES_AUDIO_CODING_CODECS_G722_AUDIO_DECODER_G722_H_
#include "api/audio_codecs/audio_decoder.h"
typedef struct WebRtcG722DecInst G722DecInst;
namespace webrtc {
class AudioDecoderG722Impl final : public AudioDecoder {
public:
AudioDecoderG722Impl();
~AudioDecoderG722Impl() override;
AudioDecoderG722Impl(const AudioDecoderG722Impl&) = delete;
AudioDecoderG722Impl& operator=(const AudioDecoderG722Impl&) = delete;
bool HasDecodePlc() const override;
void Reset() override;
std::vector<ParseResult> ParsePayload(rtc::Buffer&& payload,
uint32_t timestamp) override;
int PacketDuration(const uint8_t* encoded, size_t encoded_len) const override;
int SampleRateHz() const override;
size_t Channels() const override;
protected:
int DecodeInternal(const uint8_t* encoded,
size_t encoded_len,
int sample_rate_hz,
int16_t* decoded,
SpeechType* speech_type) override;
private:
G722DecInst* dec_state_;
};
class AudioDecoderG722StereoImpl final : public AudioDecoder {
public:
AudioDecoderG722StereoImpl();
~AudioDecoderG722StereoImpl() override;
AudioDecoderG722StereoImpl(const AudioDecoderG722StereoImpl&) = delete;
AudioDecoderG722StereoImpl& operator=(const AudioDecoderG722StereoImpl&) =
delete;
void Reset() override;
std::vector<ParseResult> ParsePayload(rtc::Buffer&& payload,
uint32_t timestamp) override;
int SampleRateHz() const override;
int PacketDuration(const uint8_t* encoded, size_t encoded_len) const override;
size_t Channels() const override;
protected:
int DecodeInternal(const uint8_t* encoded,
size_t encoded_len,
int sample_rate_hz,
int16_t* decoded,
SpeechType* speech_type) override;
private:
// Splits the stereo-interleaved payload in `encoded` into separate payloads
// for left and right channels. The separated payloads are written to
// `encoded_deinterleaved`, which must hold at least `encoded_len` samples.
// The left channel starts at offset 0, while the right channel starts at
// offset encoded_len / 2 into `encoded_deinterleaved`.
void SplitStereoPacket(const uint8_t* encoded,
size_t encoded_len,
uint8_t* encoded_deinterleaved);
G722DecInst* dec_state_left_;
G722DecInst* dec_state_right_;
};
} // namespace webrtc
#endif // MODULES_AUDIO_CODING_CODECS_G722_AUDIO_DECODER_G722_H_
|
