1 /* 2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. 3 * 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 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 /* 12 * Contains functions often used by different parts of VoiceEngine. 13 */ 14 15 #ifndef WEBRTC_VOICE_ENGINE_UTILITY_H_ 16 #define WEBRTC_VOICE_ENGINE_UTILITY_H_ 17 18 #include "webrtc/common_audio/resampler/include/push_resampler.h" 19 #include "webrtc/typedefs.h" 20 21 namespace webrtc { 22 23 class AudioFrame; 24 25 namespace voe { 26 27 // Upmix or downmix and resample the audio to |dst_frame|. Expects |dst_frame| 28 // to have its sample rate and channels members set to the desired values. 29 // Updates the |samples_per_channel_| member accordingly. 30 // 31 // This version has an AudioFrame |src_frame| as input and sets the output 32 // |timestamp_|, |elapsed_time_ms_| and |ntp_time_ms_| members equals to the 33 // input ones. 34 void RemixAndResample(const AudioFrame& src_frame, 35 PushResampler<int16_t>* resampler, 36 AudioFrame* dst_frame); 37 38 // This version has a pointer to the samples |src_data| as input and receives 39 // |samples_per_channel|, |num_channels| and |sample_rate_hz| of the data as 40 // parameters. 41 void RemixAndResample(const int16_t* src_data, 42 size_t samples_per_channel, 43 size_t num_channels, 44 int sample_rate_hz, 45 PushResampler<int16_t>* resampler, 46 AudioFrame* dst_frame); 47 48 void MixWithSat(int16_t target[], 49 size_t target_channel, 50 const int16_t source[], 51 size_t source_channel, 52 size_t source_len); 53 54 } // namespace voe 55 } // namespace webrtc 56 57 #endif // WEBRTC_VOICE_ENGINE_UTILITY_H_ 58