| // Copyright 2016 The Cobalt Authors. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include "cobalt/speech/microphone_starboard.h" |
| |
| #if defined(SB_USE_SB_MICROPHONE) |
| |
| #include "starboard/common/log.h" |
| |
| namespace cobalt { |
| namespace speech { |
| |
| namespace { |
| // The maximum of microphones which can be supported. Currently only supports |
| // one microphone. |
| const int kNumberOfMicrophones = 1; |
| |
| template <std::size_t N> |
| bool IsNullTerminated(const char (&str)[N]) { |
| for (size_t i = 0; i < N; ++i) { |
| if (str[i] == '\0') { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| } // namespace |
| |
| MicrophoneStarboard::MicrophoneStarboard(int sample_rate, int buffer_size_bytes) |
| : Microphone(), |
| min_microphone_read_in_bytes_(-1), |
| microphone_(kSbMicrophoneInvalid) { |
| SbMicrophoneInfo info[kNumberOfMicrophones]; |
| int microphone_num = SbMicrophoneGetAvailable(info, kNumberOfMicrophones); |
| |
| // Loop all the available microphones and create a valid one. |
| for (int index = 0; index < microphone_num; ++index) { |
| if (!SbMicrophoneIsSampleRateSupported(info[index].id, sample_rate)) { |
| continue; |
| } |
| |
| microphone_ = |
| SbMicrophoneCreate(info[index].id, sample_rate, buffer_size_bytes); |
| if (!SbMicrophoneIsValid(microphone_)) { |
| continue; |
| } |
| |
| // Created a microphone successfully. |
| min_microphone_read_in_bytes_ = info[index].min_read_size; |
| |
| if (IsNullTerminated(info[index].label)) { |
| label_ = info[index].label; |
| } |
| |
| return; |
| } |
| } |
| |
| MicrophoneStarboard::~MicrophoneStarboard() { |
| SbMicrophoneDestroy(microphone_); |
| } |
| |
| bool MicrophoneStarboard::Open() { |
| SB_DCHECK(SbMicrophoneIsValid(microphone_)); |
| return SbMicrophoneOpen(microphone_); |
| } |
| |
| int MicrophoneStarboard::Read(char* out_data, int data_size) { |
| SB_DCHECK(SbMicrophoneIsValid(microphone_)); |
| return SbMicrophoneRead(microphone_, out_data, data_size); |
| } |
| |
| bool MicrophoneStarboard::Close() { |
| SB_DCHECK(SbMicrophoneIsValid(microphone_)); |
| return SbMicrophoneClose(microphone_); |
| } |
| |
| } // namespace speech |
| } // namespace cobalt |
| |
| #endif // defined(SB_USE_SB_MICROPHONE) |