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1 /* | 1 /* |
2 * Copyright (c) 2014 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2014 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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38 | 38 |
39 AudioEncoderG722::AudioEncoderG722(const Config& config) | 39 AudioEncoderG722::AudioEncoderG722(const Config& config) |
40 : num_channels_(config.num_channels), | 40 : num_channels_(config.num_channels), |
41 payload_type_(config.payload_type), | 41 payload_type_(config.payload_type), |
42 num_10ms_frames_per_packet_( | 42 num_10ms_frames_per_packet_( |
43 static_cast<size_t>(config.frame_size_ms / 10)), | 43 static_cast<size_t>(config.frame_size_ms / 10)), |
44 num_10ms_frames_buffered_(0), | 44 num_10ms_frames_buffered_(0), |
45 first_timestamp_in_buffer_(0), | 45 first_timestamp_in_buffer_(0), |
46 encoders_(new EncoderState[num_channels_]), | 46 encoders_(new EncoderState[num_channels_]), |
47 interleave_buffer_(2 * num_channels_) { | 47 interleave_buffer_(2 * num_channels_) { |
48 CHECK(config.IsOk()); | 48 RTC_CHECK(config.IsOk()); |
49 const size_t samples_per_channel = | 49 const size_t samples_per_channel = |
50 kSampleRateHz / 100 * num_10ms_frames_per_packet_; | 50 kSampleRateHz / 100 * num_10ms_frames_per_packet_; |
51 for (int i = 0; i < num_channels_; ++i) { | 51 for (int i = 0; i < num_channels_; ++i) { |
52 encoders_[i].speech_buffer.reset(new int16_t[samples_per_channel]); | 52 encoders_[i].speech_buffer.reset(new int16_t[samples_per_channel]); |
53 encoders_[i].encoded_buffer.SetSize(samples_per_channel / 2); | 53 encoders_[i].encoded_buffer.SetSize(samples_per_channel / 2); |
54 } | 54 } |
55 Reset(); | 55 Reset(); |
56 } | 56 } |
57 | 57 |
58 AudioEncoderG722::AudioEncoderG722(const CodecInst& codec_inst) | 58 AudioEncoderG722::AudioEncoderG722(const CodecInst& codec_inst) |
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89 int AudioEncoderG722::GetTargetBitrate() const { | 89 int AudioEncoderG722::GetTargetBitrate() const { |
90 // 4 bits/sample, 16000 samples/s/channel. | 90 // 4 bits/sample, 16000 samples/s/channel. |
91 return 64000 * NumChannels(); | 91 return 64000 * NumChannels(); |
92 } | 92 } |
93 | 93 |
94 AudioEncoder::EncodedInfo AudioEncoderG722::EncodeInternal( | 94 AudioEncoder::EncodedInfo AudioEncoderG722::EncodeInternal( |
95 uint32_t rtp_timestamp, | 95 uint32_t rtp_timestamp, |
96 const int16_t* audio, | 96 const int16_t* audio, |
97 size_t max_encoded_bytes, | 97 size_t max_encoded_bytes, |
98 uint8_t* encoded) { | 98 uint8_t* encoded) { |
99 CHECK_GE(max_encoded_bytes, MaxEncodedBytes()); | 99 RTC_CHECK_GE(max_encoded_bytes, MaxEncodedBytes()); |
100 | 100 |
101 if (num_10ms_frames_buffered_ == 0) | 101 if (num_10ms_frames_buffered_ == 0) |
102 first_timestamp_in_buffer_ = rtp_timestamp; | 102 first_timestamp_in_buffer_ = rtp_timestamp; |
103 | 103 |
104 // Deinterleave samples and save them in each channel's buffer. | 104 // Deinterleave samples and save them in each channel's buffer. |
105 const size_t start = kSampleRateHz / 100 * num_10ms_frames_buffered_; | 105 const size_t start = kSampleRateHz / 100 * num_10ms_frames_buffered_; |
106 for (size_t i = 0; i < kSampleRateHz / 100; ++i) | 106 for (size_t i = 0; i < kSampleRateHz / 100; ++i) |
107 for (int j = 0; j < num_channels_; ++j) | 107 for (int j = 0; j < num_channels_; ++j) |
108 encoders_[j].speech_buffer[start + i] = audio[i * num_channels_ + j]; | 108 encoders_[j].speech_buffer[start + i] = audio[i * num_channels_ + j]; |
109 | 109 |
110 // If we don't yet have enough samples for a packet, we're done for now. | 110 // If we don't yet have enough samples for a packet, we're done for now. |
111 if (++num_10ms_frames_buffered_ < num_10ms_frames_per_packet_) { | 111 if (++num_10ms_frames_buffered_ < num_10ms_frames_per_packet_) { |
112 return EncodedInfo(); | 112 return EncodedInfo(); |
113 } | 113 } |
114 | 114 |
115 // Encode each channel separately. | 115 // Encode each channel separately. |
116 CHECK_EQ(num_10ms_frames_buffered_, num_10ms_frames_per_packet_); | 116 RTC_CHECK_EQ(num_10ms_frames_buffered_, num_10ms_frames_per_packet_); |
117 num_10ms_frames_buffered_ = 0; | 117 num_10ms_frames_buffered_ = 0; |
118 const size_t samples_per_channel = SamplesPerChannel(); | 118 const size_t samples_per_channel = SamplesPerChannel(); |
119 for (int i = 0; i < num_channels_; ++i) { | 119 for (int i = 0; i < num_channels_; ++i) { |
120 const size_t encoded = WebRtcG722_Encode( | 120 const size_t encoded = WebRtcG722_Encode( |
121 encoders_[i].encoder, encoders_[i].speech_buffer.get(), | 121 encoders_[i].encoder, encoders_[i].speech_buffer.get(), |
122 samples_per_channel, encoders_[i].encoded_buffer.data()); | 122 samples_per_channel, encoders_[i].encoded_buffer.data()); |
123 CHECK_EQ(encoded, samples_per_channel / 2); | 123 RTC_CHECK_EQ(encoded, samples_per_channel / 2); |
124 } | 124 } |
125 | 125 |
126 // Interleave the encoded bytes of the different channels. Each separate | 126 // Interleave the encoded bytes of the different channels. Each separate |
127 // channel and the interleaved stream encodes two samples per byte, most | 127 // channel and the interleaved stream encodes two samples per byte, most |
128 // significant half first. | 128 // significant half first. |
129 for (size_t i = 0; i < samples_per_channel / 2; ++i) { | 129 for (size_t i = 0; i < samples_per_channel / 2; ++i) { |
130 for (int j = 0; j < num_channels_; ++j) { | 130 for (int j = 0; j < num_channels_; ++j) { |
131 uint8_t two_samples = encoders_[j].encoded_buffer.data()[i]; | 131 uint8_t two_samples = encoders_[j].encoded_buffer.data()[i]; |
132 interleave_buffer_.data()[j] = two_samples >> 4; | 132 interleave_buffer_.data()[j] = two_samples >> 4; |
133 interleave_buffer_.data()[num_channels_ + j] = two_samples & 0xf; | 133 interleave_buffer_.data()[num_channels_ + j] = two_samples & 0xf; |
134 } | 134 } |
135 for (int j = 0; j < num_channels_; ++j) | 135 for (int j = 0; j < num_channels_; ++j) |
136 encoded[i * num_channels_ + j] = interleave_buffer_.data()[2 * j] << 4 | | 136 encoded[i * num_channels_ + j] = interleave_buffer_.data()[2 * j] << 4 | |
137 interleave_buffer_.data()[2 * j + 1]; | 137 interleave_buffer_.data()[2 * j + 1]; |
138 } | 138 } |
139 EncodedInfo info; | 139 EncodedInfo info; |
140 info.encoded_bytes = samples_per_channel / 2 * num_channels_; | 140 info.encoded_bytes = samples_per_channel / 2 * num_channels_; |
141 info.encoded_timestamp = first_timestamp_in_buffer_; | 141 info.encoded_timestamp = first_timestamp_in_buffer_; |
142 info.payload_type = payload_type_; | 142 info.payload_type = payload_type_; |
143 return info; | 143 return info; |
144 } | 144 } |
145 | 145 |
146 void AudioEncoderG722::Reset() { | 146 void AudioEncoderG722::Reset() { |
147 num_10ms_frames_buffered_ = 0; | 147 num_10ms_frames_buffered_ = 0; |
148 for (int i = 0; i < num_channels_; ++i) | 148 for (int i = 0; i < num_channels_; ++i) |
149 CHECK_EQ(0, WebRtcG722_EncoderInit(encoders_[i].encoder)); | 149 RTC_CHECK_EQ(0, WebRtcG722_EncoderInit(encoders_[i].encoder)); |
150 } | 150 } |
151 | 151 |
152 AudioEncoderG722::EncoderState::EncoderState() { | 152 AudioEncoderG722::EncoderState::EncoderState() { |
153 CHECK_EQ(0, WebRtcG722_CreateEncoder(&encoder)); | 153 RTC_CHECK_EQ(0, WebRtcG722_CreateEncoder(&encoder)); |
154 } | 154 } |
155 | 155 |
156 AudioEncoderG722::EncoderState::~EncoderState() { | 156 AudioEncoderG722::EncoderState::~EncoderState() { |
157 CHECK_EQ(0, WebRtcG722_FreeEncoder(encoder)); | 157 RTC_CHECK_EQ(0, WebRtcG722_FreeEncoder(encoder)); |
158 } | 158 } |
159 | 159 |
160 size_t AudioEncoderG722::SamplesPerChannel() const { | 160 size_t AudioEncoderG722::SamplesPerChannel() const { |
161 return kSampleRateHz / 100 * num_10ms_frames_per_packet_; | 161 return kSampleRateHz / 100 * num_10ms_frames_per_packet_; |
162 } | 162 } |
163 | 163 |
164 } // namespace webrtc | 164 } // namespace webrtc |
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