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1 /* | 1 /* |
2 * Copyright (c) 2013 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2013 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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63 record_write_pos_ = 0; | 63 record_write_pos_ = 0; |
64 memset(record_cache_buffer_.get(), 0, required_record_buffer_size_bytes_); | 64 memset(record_cache_buffer_.get(), 0, required_record_buffer_size_bytes_); |
65 } | 65 } |
66 | 66 |
67 void FineAudioBuffer::GetPlayoutData(int8_t* buffer) { | 67 void FineAudioBuffer::GetPlayoutData(int8_t* buffer) { |
68 if (desired_frame_size_bytes_ <= playout_cached_bytes_) { | 68 if (desired_frame_size_bytes_ <= playout_cached_bytes_) { |
69 memcpy(buffer, &playout_cache_buffer_.get()[playout_cached_buffer_start_], | 69 memcpy(buffer, &playout_cache_buffer_.get()[playout_cached_buffer_start_], |
70 desired_frame_size_bytes_); | 70 desired_frame_size_bytes_); |
71 playout_cached_buffer_start_ += desired_frame_size_bytes_; | 71 playout_cached_buffer_start_ += desired_frame_size_bytes_; |
72 playout_cached_bytes_ -= desired_frame_size_bytes_; | 72 playout_cached_bytes_ -= desired_frame_size_bytes_; |
73 CHECK_LT(playout_cached_buffer_start_ + playout_cached_bytes_, | 73 RTC_CHECK_LT(playout_cached_buffer_start_ + playout_cached_bytes_, |
74 bytes_per_10_ms_); | 74 bytes_per_10_ms_); |
75 return; | 75 return; |
76 } | 76 } |
77 memcpy(buffer, &playout_cache_buffer_.get()[playout_cached_buffer_start_], | 77 memcpy(buffer, &playout_cache_buffer_.get()[playout_cached_buffer_start_], |
78 playout_cached_bytes_); | 78 playout_cached_bytes_); |
79 // Push another n*10ms of audio to |buffer|. n > 1 if | 79 // Push another n*10ms of audio to |buffer|. n > 1 if |
80 // |desired_frame_size_bytes_| is greater than 10ms of audio. Note that we | 80 // |desired_frame_size_bytes_| is greater than 10ms of audio. Note that we |
81 // write the audio after the cached bytes copied earlier. | 81 // write the audio after the cached bytes copied earlier. |
82 int8_t* unwritten_buffer = &buffer[playout_cached_bytes_]; | 82 int8_t* unwritten_buffer = &buffer[playout_cached_bytes_]; |
83 int bytes_left = | 83 int bytes_left = |
84 static_cast<int>(desired_frame_size_bytes_ - playout_cached_bytes_); | 84 static_cast<int>(desired_frame_size_bytes_ - playout_cached_bytes_); |
85 // Ceiling of integer division: 1 + ((x - 1) / y) | 85 // Ceiling of integer division: 1 + ((x - 1) / y) |
86 size_t number_of_requests = 1 + (bytes_left - 1) / (bytes_per_10_ms_); | 86 size_t number_of_requests = 1 + (bytes_left - 1) / (bytes_per_10_ms_); |
87 for (size_t i = 0; i < number_of_requests; ++i) { | 87 for (size_t i = 0; i < number_of_requests; ++i) { |
88 device_buffer_->RequestPlayoutData(samples_per_10_ms_); | 88 device_buffer_->RequestPlayoutData(samples_per_10_ms_); |
89 int num_out = device_buffer_->GetPlayoutData(unwritten_buffer); | 89 int num_out = device_buffer_->GetPlayoutData(unwritten_buffer); |
90 if (static_cast<size_t>(num_out) != samples_per_10_ms_) { | 90 if (static_cast<size_t>(num_out) != samples_per_10_ms_) { |
91 CHECK_EQ(num_out, 0); | 91 RTC_CHECK_EQ(num_out, 0); |
92 playout_cached_bytes_ = 0; | 92 playout_cached_bytes_ = 0; |
93 return; | 93 return; |
94 } | 94 } |
95 unwritten_buffer += bytes_per_10_ms_; | 95 unwritten_buffer += bytes_per_10_ms_; |
96 CHECK_GE(bytes_left, 0); | 96 RTC_CHECK_GE(bytes_left, 0); |
97 bytes_left -= static_cast<int>(bytes_per_10_ms_); | 97 bytes_left -= static_cast<int>(bytes_per_10_ms_); |
98 } | 98 } |
99 CHECK_LE(bytes_left, 0); | 99 RTC_CHECK_LE(bytes_left, 0); |
100 // Put the samples that were written to |buffer| but are not used in the | 100 // Put the samples that were written to |buffer| but are not used in the |
101 // cache. | 101 // cache. |
102 size_t cache_location = desired_frame_size_bytes_; | 102 size_t cache_location = desired_frame_size_bytes_; |
103 int8_t* cache_ptr = &buffer[cache_location]; | 103 int8_t* cache_ptr = &buffer[cache_location]; |
104 playout_cached_bytes_ = number_of_requests * bytes_per_10_ms_ - | 104 playout_cached_bytes_ = number_of_requests * bytes_per_10_ms_ - |
105 (desired_frame_size_bytes_ - playout_cached_bytes_); | 105 (desired_frame_size_bytes_ - playout_cached_bytes_); |
106 // If playout_cached_bytes_ is larger than the cache buffer, uninitialized | 106 // If playout_cached_bytes_ is larger than the cache buffer, uninitialized |
107 // memory will be read. | 107 // memory will be read. |
108 CHECK_LE(playout_cached_bytes_, bytes_per_10_ms_); | 108 RTC_CHECK_LE(playout_cached_bytes_, bytes_per_10_ms_); |
109 CHECK_EQ(static_cast<size_t>(-bytes_left), playout_cached_bytes_); | 109 RTC_CHECK_EQ(static_cast<size_t>(-bytes_left), playout_cached_bytes_); |
110 playout_cached_buffer_start_ = 0; | 110 playout_cached_buffer_start_ = 0; |
111 memcpy(playout_cache_buffer_.get(), cache_ptr, playout_cached_bytes_); | 111 memcpy(playout_cache_buffer_.get(), cache_ptr, playout_cached_bytes_); |
112 } | 112 } |
113 | 113 |
114 void FineAudioBuffer::DeliverRecordedData(const int8_t* buffer, | 114 void FineAudioBuffer::DeliverRecordedData(const int8_t* buffer, |
115 size_t size_in_bytes, | 115 size_t size_in_bytes, |
116 int playout_delay_ms, | 116 int playout_delay_ms, |
117 int record_delay_ms) { | 117 int record_delay_ms) { |
118 CHECK_EQ(size_in_bytes, desired_frame_size_bytes_); | 118 RTC_CHECK_EQ(size_in_bytes, desired_frame_size_bytes_); |
119 // Check if the temporary buffer can store the incoming buffer. If not, | 119 // Check if the temporary buffer can store the incoming buffer. If not, |
120 // move the remaining (old) bytes to the beginning of the temporary buffer | 120 // move the remaining (old) bytes to the beginning of the temporary buffer |
121 // and start adding new samples after the old samples. | 121 // and start adding new samples after the old samples. |
122 if (record_write_pos_ + size_in_bytes > required_record_buffer_size_bytes_) { | 122 if (record_write_pos_ + size_in_bytes > required_record_buffer_size_bytes_) { |
123 if (record_cached_bytes_ > 0) { | 123 if (record_cached_bytes_ > 0) { |
124 memmove(record_cache_buffer_.get(), | 124 memmove(record_cache_buffer_.get(), |
125 record_cache_buffer_.get() + record_read_pos_, | 125 record_cache_buffer_.get() + record_read_pos_, |
126 record_cached_bytes_); | 126 record_cached_bytes_); |
127 } | 127 } |
128 record_write_pos_ = record_cached_bytes_; | 128 record_write_pos_ = record_cached_bytes_; |
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141 device_buffer_->SetVQEData(playout_delay_ms, record_delay_ms, 0); | 141 device_buffer_->SetVQEData(playout_delay_ms, record_delay_ms, 0); |
142 device_buffer_->DeliverRecordedData(); | 142 device_buffer_->DeliverRecordedData(); |
143 // Read next chunk of 10ms data. | 143 // Read next chunk of 10ms data. |
144 record_read_pos_ += bytes_per_10_ms_; | 144 record_read_pos_ += bytes_per_10_ms_; |
145 // Reduce number of cached bytes with the consumed amount. | 145 // Reduce number of cached bytes with the consumed amount. |
146 record_cached_bytes_ -= bytes_per_10_ms_; | 146 record_cached_bytes_ -= bytes_per_10_ms_; |
147 } | 147 } |
148 } | 148 } |
149 | 149 |
150 } // namespace webrtc | 150 } // namespace webrtc |
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