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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 |
| 11 #include "webrtc/modules/audio_processing/agc/agc_manager_direct.h" | 11 #include "webrtc/modules/audio_processing/agc/agc_manager_direct.h" |
| 12 | 12 |
| 13 #include <cassert> | |
| 14 #include <cmath> | 13 #include <cmath> |
| 15 | 14 |
| 16 #ifdef WEBRTC_AGC_DEBUG_DUMP | 15 #ifdef WEBRTC_AGC_DEBUG_DUMP |
| 17 #include <cstdio> | 16 #include <cstdio> |
| 18 #endif | 17 #endif |
| 19 | 18 |
| 19 #include "webrtc/base/checks.h" |
| 20 #include "webrtc/modules/audio_processing/agc/gain_map_internal.h" | 20 #include "webrtc/modules/audio_processing/agc/gain_map_internal.h" |
| 21 #include "webrtc/modules/audio_processing/gain_control_impl.h" | 21 #include "webrtc/modules/audio_processing/gain_control_impl.h" |
| 22 #include "webrtc/modules/include/module_common_types.h" | 22 #include "webrtc/modules/include/module_common_types.h" |
| 23 #include "webrtc/system_wrappers/include/logging.h" | 23 #include "webrtc/system_wrappers/include/logging.h" |
| 24 | 24 |
| 25 namespace webrtc { | 25 namespace webrtc { |
| 26 | 26 |
| 27 namespace { | 27 namespace { |
| 28 | 28 |
| 29 // Lowest the microphone level can be lowered due to clipping. | 29 // Lowest the microphone level can be lowered due to clipping. |
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| 54 | 54 |
| 55 // Maximum additional gain allowed to compensate for microphone level | 55 // Maximum additional gain allowed to compensate for microphone level |
| 56 // restrictions from clipping events. | 56 // restrictions from clipping events. |
| 57 const int kSurplusCompressionGain = 6; | 57 const int kSurplusCompressionGain = 6; |
| 58 | 58 |
| 59 int ClampLevel(int mic_level) { | 59 int ClampLevel(int mic_level) { |
| 60 return std::min(std::max(kMinMicLevel, mic_level), kMaxMicLevel); | 60 return std::min(std::max(kMinMicLevel, mic_level), kMaxMicLevel); |
| 61 } | 61 } |
| 62 | 62 |
| 63 int LevelFromGainError(int gain_error, int level) { | 63 int LevelFromGainError(int gain_error, int level) { |
| 64 assert(level >= 0 && level <= kMaxMicLevel); | 64 RTC_DCHECK_GE(level, 0); |
| 65 RTC_DCHECK_LE(level, kMaxMicLevel); |
| 65 if (gain_error == 0) { | 66 if (gain_error == 0) { |
| 66 return level; | 67 return level; |
| 67 } | 68 } |
| 68 // TODO(ajm): Could be made more efficient with a binary search. | 69 // TODO(ajm): Could be made more efficient with a binary search. |
| 69 int new_level = level; | 70 int new_level = level; |
| 70 if (gain_error > 0) { | 71 if (gain_error > 0) { |
| 71 while (kGainMap[new_level] - kGainMap[level] < gain_error && | 72 while (kGainMap[new_level] - kGainMap[level] < gain_error && |
| 72 new_level < kMaxMicLevel) { | 73 new_level < kMaxMicLevel) { |
| 73 ++new_level; | 74 ++new_level; |
| 74 } | 75 } |
| 75 } else { | 76 } else { |
| 76 while (kGainMap[new_level] - kGainMap[level] > gain_error && | 77 while (kGainMap[new_level] - kGainMap[level] > gain_error && |
| 77 new_level > kMinMicLevel) { | 78 new_level > kMinMicLevel) { |
| 78 --new_level; | 79 --new_level; |
| 79 } | 80 } |
| 80 } | 81 } |
| 81 return new_level; | 82 return new_level; |
| 82 } | 83 } |
| 83 | 84 |
| 84 } // namespace | 85 } // namespace |
| 85 | 86 |
| 86 // Facility for dumping debug audio files. All methods are no-ops in the | 87 // Facility for dumping debug audio files. All methods are no-ops in the |
| 87 // default case where WEBRTC_AGC_DEBUG_DUMP is undefined. | 88 // default case where WEBRTC_AGC_DEBUG_DUMP is undefined. |
| 88 class DebugFile { | 89 class DebugFile { |
| 89 #ifdef WEBRTC_AGC_DEBUG_DUMP | 90 #ifdef WEBRTC_AGC_DEBUG_DUMP |
| 90 public: | 91 public: |
| 91 explicit DebugFile(const char* filename) | 92 explicit DebugFile(const char* filename) |
| 92 : file_(fopen(filename, "wb")) { | 93 : file_(fopen(filename, "wb")) { |
| 93 assert(file_); | 94 RTC_DCHECK(file_); |
| 94 } | 95 } |
| 95 ~DebugFile() { | 96 ~DebugFile() { |
| 96 fclose(file_); | 97 fclose(file_); |
| 97 } | 98 } |
| 98 void Write(const int16_t* data, size_t length_samples) { | 99 void Write(const int16_t* data, size_t length_samples) { |
| 99 fwrite(data, 1, length_samples * sizeof(int16_t), file_); | 100 fwrite(data, 1, length_samples * sizeof(int16_t), file_); |
| 100 } | 101 } |
| 101 private: | 102 private: |
| 102 FILE* file_; | 103 FILE* file_; |
| 103 #else | 104 #else |
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| 238 | 239 |
| 239 if (check_volume_on_next_process_) { | 240 if (check_volume_on_next_process_) { |
| 240 check_volume_on_next_process_ = false; | 241 check_volume_on_next_process_ = false; |
| 241 // We have to wait until the first process call to check the volume, | 242 // We have to wait until the first process call to check the volume, |
| 242 // because Chromium doesn't guarantee it to be valid any earlier. | 243 // because Chromium doesn't guarantee it to be valid any earlier. |
| 243 CheckVolumeAndReset(); | 244 CheckVolumeAndReset(); |
| 244 } | 245 } |
| 245 | 246 |
| 246 if (agc_->Process(audio, length, sample_rate_hz) != 0) { | 247 if (agc_->Process(audio, length, sample_rate_hz) != 0) { |
| 247 LOG(LS_ERROR) << "Agc::Process failed"; | 248 LOG(LS_ERROR) << "Agc::Process failed"; |
| 248 assert(false); | 249 RTC_NOTREACHED(); |
| 249 } | 250 } |
| 250 | 251 |
| 251 UpdateGain(); | 252 UpdateGain(); |
| 252 UpdateCompressor(); | 253 UpdateCompressor(); |
| 253 | 254 |
| 254 file_postproc_->Write(audio, length); | 255 file_postproc_->Write(audio, length); |
| 255 } | 256 } |
| 256 | 257 |
| 257 void AgcManagerDirect::SetLevel(int new_level) { | 258 void AgcManagerDirect::SetLevel(int new_level) { |
| 258 int voe_level = volume_callbacks_->GetMicVolume(); | 259 int voe_level = volume_callbacks_->GetMicVolume(); |
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| 290 } | 291 } |
| 291 | 292 |
| 292 volume_callbacks_->SetMicVolume(new_level); | 293 volume_callbacks_->SetMicVolume(new_level); |
| 293 LOG(LS_INFO) << "[agc] voe_level=" << voe_level << ", " | 294 LOG(LS_INFO) << "[agc] voe_level=" << voe_level << ", " |
| 294 << "level_=" << level_ << ", " | 295 << "level_=" << level_ << ", " |
| 295 << "new_level=" << new_level; | 296 << "new_level=" << new_level; |
| 296 level_ = new_level; | 297 level_ = new_level; |
| 297 } | 298 } |
| 298 | 299 |
| 299 void AgcManagerDirect::SetMaxLevel(int level) { | 300 void AgcManagerDirect::SetMaxLevel(int level) { |
| 300 assert(level >= kClippedLevelMin); | 301 RTC_DCHECK_GE(level, kClippedLevelMin); |
| 301 max_level_ = level; | 302 max_level_ = level; |
| 302 // Scale the |kSurplusCompressionGain| linearly across the restricted | 303 // Scale the |kSurplusCompressionGain| linearly across the restricted |
| 303 // level range. | 304 // level range. |
| 304 max_compression_gain_ = kMaxCompressionGain + std::floor( | 305 max_compression_gain_ = kMaxCompressionGain + std::floor( |
| 305 (1.f * kMaxMicLevel - max_level_) / (kMaxMicLevel - kClippedLevelMin) * | 306 (1.f * kMaxMicLevel - max_level_) / (kMaxMicLevel - kClippedLevelMin) * |
| 306 kSurplusCompressionGain + 0.5f); | 307 kSurplusCompressionGain + 0.5f); |
| 307 LOG(LS_INFO) << "[agc] max_level_=" << max_level_ | 308 LOG(LS_INFO) << "[agc] max_level_=" << max_level_ |
| 308 << ", max_compression_gain_=" << max_compression_gain_; | 309 << ", max_compression_gain_=" << max_compression_gain_; |
| 309 } | 310 } |
| 310 | 311 |
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| 434 compression_ = new_compression; | 435 compression_ = new_compression; |
| 435 compression_accumulator_ = new_compression; | 436 compression_accumulator_ = new_compression; |
| 436 if (gctrl_->set_compression_gain_db(compression_) != 0) { | 437 if (gctrl_->set_compression_gain_db(compression_) != 0) { |
| 437 LOG(LS_ERROR) << "set_compression_gain_db(" << compression_ | 438 LOG(LS_ERROR) << "set_compression_gain_db(" << compression_ |
| 438 << ") failed."; | 439 << ") failed."; |
| 439 } | 440 } |
| 440 } | 441 } |
| 441 } | 442 } |
| 442 | 443 |
| 443 } // namespace webrtc | 444 } // namespace webrtc |
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