80 int AudioFrameOperations::MonoToStereo(AudioFrame* frame) {  in MonoToStereo()  argument
81   if (frame->num_channels_ != 1) {  in MonoToStereo()
84   if ((frame->samples_per_channel_ * 2) >= AudioFrame::kMaxDataSizeSamples) {  in MonoToStereo()
89   if (!frame->muted()) {  in MonoToStereo()
92     memcpy(data_copy, frame->data(),  in MonoToStereo()
93            sizeof(int16_t) * frame->samples_per_channel_);  in MonoToStereo()
94     MonoToStereo(data_copy, frame->samples_per_channel_, frame->mutable_data());  in MonoToStereo()
96   frame->num_channels_ = 2;  in MonoToStereo()
110 int AudioFrameOperations::StereoToMono(AudioFrame* frame) {  in StereoToMono()  argument
111   if (frame->num_channels_ != 2) {  in StereoToMono()
115   RTC_DCHECK_LE(frame->samples_per_channel_ * 2,  in StereoToMono()
118   if (!frame->muted()) {  in StereoToMono()
119     StereoToMono(frame->data(), frame->samples_per_channel_,  in StereoToMono()
120                  frame->mutable_data());  in StereoToMono()
122   frame->num_channels_ = 1;  in StereoToMono()
139 int AudioFrameOperations::QuadToStereo(AudioFrame* frame) {  in QuadToStereo()  argument
140   if (frame->num_channels_ != 4) {  in QuadToStereo()
144   RTC_DCHECK_LE(frame->samples_per_channel_ * 4,  in QuadToStereo()
147   if (!frame->muted()) {  in QuadToStereo()
148     QuadToStereo(frame->data(), frame->samples_per_channel_,  in QuadToStereo()
149                  frame->mutable_data());  in QuadToStereo()
151   frame->num_channels_ = 2;  in QuadToStereo()
166 int AudioFrameOperations::QuadToMono(AudioFrame* frame) {  in QuadToMono()  argument
167   if (frame->num_channels_ != 4) {  in QuadToMono()
171   RTC_DCHECK_LE(frame->samples_per_channel_ * 4,  in QuadToMono()
174   if (!frame->muted()) {  in QuadToMono()
175     QuadToMono(frame->data(), frame->samples_per_channel_,  in QuadToMono()
176                frame->mutable_data());  in QuadToMono()
178   frame->num_channels_ = 1;  in QuadToMono()
204                                           AudioFrame* frame) {  in DownmixChannels()  argument
205   if (frame->num_channels_ == 2 && dst_channels == 1) {  in DownmixChannels()
206     return StereoToMono(frame);  in DownmixChannels()
207   } else if (frame->num_channels_ == 4 && dst_channels == 2) {  in DownmixChannels()
208     return QuadToStereo(frame);  in DownmixChannels()
209   } else if (frame->num_channels_ == 4 && dst_channels == 1) {  in DownmixChannels()
210     return QuadToMono(frame);  in DownmixChannels()
216 void AudioFrameOperations::SwapStereoChannels(AudioFrame* frame) {  in SwapStereoChannels()  argument
217   RTC_DCHECK(frame);  in SwapStereoChannels()
218   if (frame->num_channels_ != 2 || frame->muted()) {  in SwapStereoChannels()
222   int16_t* frame_data = frame->mutable_data();  in SwapStereoChannels()
223   for (size_t i = 0; i < frame->samples_per_channel_ * 2; i += 2) {  in SwapStereoChannels()
230 void AudioFrameOperations::Mute(AudioFrame* frame,  in Mute()  argument
233   RTC_DCHECK(frame);  in Mute()
238     size_t total_samples = frame->samples_per_channel_ * frame->num_channels_;  in Mute()
240     frame->Mute();  in Mute()
243     if (frame->muted()) {  in Mute()
250     if (frame->samples_per_channel_ < kMuteFadeFrames) {  in Mute()
251       count = frame->samples_per_channel_;  in Mute()
263       start = frame->samples_per_channel_ - count;  in Mute()
264       end = frame->samples_per_channel_;  in Mute()
273     int16_t* frame_data = frame->mutable_data();  in Mute()
274     size_t channels = frame->num_channels_;  in Mute()
285 void AudioFrameOperations::Mute(AudioFrame* frame) {  in Mute()  argument
286   Mute(frame, true, true);  in Mute()
289 void AudioFrameOperations::ApplyHalfGain(AudioFrame* frame) {  in ApplyHalfGain()  argument
290   RTC_DCHECK(frame);  in ApplyHalfGain()
291   RTC_DCHECK_GT(frame->num_channels_, 0);  in ApplyHalfGain()
292   if (frame->num_channels_ < 1 || frame->muted()) {  in ApplyHalfGain()
296   int16_t* frame_data = frame->mutable_data();  in ApplyHalfGain()
297   for (size_t i = 0; i < frame->samples_per_channel_ * frame->num_channels_;  in ApplyHalfGain()
303 int AudioFrameOperations::Scale(float left, float right, AudioFrame* frame) {  in Scale()  argument
304   if (frame->num_channels_ != 2) {  in Scale()
306   } else if (frame->muted()) {  in Scale()
310   int16_t* frame_data = frame->mutable_data();  in Scale()
311   for (size_t i = 0; i < frame->samples_per_channel_; i++) {  in Scale()
318 int AudioFrameOperations::ScaleWithSat(float scale, AudioFrame* frame) {  in ScaleWithSat()  argument
319   if (frame->muted()) {  in ScaleWithSat()
323   int16_t* frame_data = frame->mutable_data();  in ScaleWithSat()
324   for (size_t i = 0; i < frame->samples_per_channel_ * frame->num_channels_;  in ScaleWithSat()