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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "remoting/codec/audio_decoder_opus.h" | 5 #include "remoting/codec/audio_decoder_opus.h" |
| 6 | 6 |
| 7 #include <stdint.h> | 7 #include <stdint.h> |
| 8 | 8 |
| 9 #include "base/logging.h" | 9 #include "base/logging.h" |
| 10 #include "base/stl_util.h" | 10 #include "base/stl_util.h" |
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| 100 int max_frame_samples = kMaxFrameSizeMs * kSamplingRate / | 100 int max_frame_samples = kMaxFrameSizeMs * kSamplingRate / |
| 101 base::Time::kMillisecondsPerSecond; | 101 base::Time::kMillisecondsPerSecond; |
| 102 int max_frame_bytes = max_frame_samples * channels_ * | 102 int max_frame_bytes = max_frame_samples * channels_ * |
| 103 decoded_packet->bytes_per_sample(); | 103 decoded_packet->bytes_per_sample(); |
| 104 | 104 |
| 105 std::string* decoded_data = decoded_packet->add_data(); | 105 std::string* decoded_data = decoded_packet->add_data(); |
| 106 decoded_data->resize(packet->data_size() * max_frame_bytes); | 106 decoded_data->resize(packet->data_size() * max_frame_bytes); |
| 107 int buffer_pos = 0; | 107 int buffer_pos = 0; |
| 108 | 108 |
| 109 for (int i = 0; i < packet->data_size(); ++i) { | 109 for (int i = 0; i < packet->data_size(); ++i) { |
| 110 int16_t* pcm_buffer = | 110 int16_t* pcm_buffer = reinterpret_cast<int16_t*>( |
| 111 reinterpret_cast<int16_t*>(string_as_array(decoded_data) + buffer_pos); | 111 base::string_as_array(decoded_data) + buffer_pos); |
| 112 CHECK_LE(buffer_pos + max_frame_bytes, | 112 CHECK_LE(buffer_pos + max_frame_bytes, |
| 113 static_cast<int>(decoded_data->size())); | 113 static_cast<int>(decoded_data->size())); |
| 114 std::string* frame = packet->mutable_data(i); | 114 std::string* frame = packet->mutable_data(i); |
| 115 unsigned char* frame_data = | 115 unsigned char* frame_data = |
| 116 reinterpret_cast<unsigned char*>(string_as_array(frame)); | 116 reinterpret_cast<unsigned char*>(base::string_as_array(frame)); |
| 117 int result = opus_decode(decoder_, frame_data, frame->size(), | 117 int result = opus_decode(decoder_, frame_data, frame->size(), |
| 118 pcm_buffer, max_frame_samples, 0); | 118 pcm_buffer, max_frame_samples, 0); |
| 119 if (result < 0) { | 119 if (result < 0) { |
| 120 LOG(ERROR) << "Failed decoding Opus frame. Error code: " << result; | 120 LOG(ERROR) << "Failed decoding Opus frame. Error code: " << result; |
| 121 DestroyDecoder(); | 121 DestroyDecoder(); |
| 122 return nullptr; | 122 return nullptr; |
| 123 } | 123 } |
| 124 | 124 |
| 125 buffer_pos += result * packet->channels() * | 125 buffer_pos += result * packet->channels() * |
| 126 decoded_packet->bytes_per_sample(); | 126 decoded_packet->bytes_per_sample(); |
| 127 } | 127 } |
| 128 | 128 |
| 129 if (!buffer_pos) { | 129 if (!buffer_pos) { |
| 130 return nullptr; | 130 return nullptr; |
| 131 } | 131 } |
| 132 | 132 |
| 133 decoded_data->resize(buffer_pos); | 133 decoded_data->resize(buffer_pos); |
| 134 | 134 |
| 135 return decoded_packet; | 135 return decoded_packet; |
| 136 } | 136 } |
| 137 | 137 |
| 138 } // namespace remoting | 138 } // namespace remoting |
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