xref: /aosp_15_r20/external/oboe/src/flowgraph/SinkI16.cpp (revision 05767d913155b055644481607e6fa1e35e2fe72c)
1*05767d91SRobert Wu /*
2*05767d91SRobert Wu  * Copyright 2018 The Android Open Source Project
3*05767d91SRobert Wu  *
4*05767d91SRobert Wu  * Licensed under the Apache License, Version 2.0 (the "License");
5*05767d91SRobert Wu  * you may not use this file except in compliance with the License.
6*05767d91SRobert Wu  * You may obtain a copy of the License at
7*05767d91SRobert Wu  *
8*05767d91SRobert Wu  *      http://www.apache.org/licenses/LICENSE-2.0
9*05767d91SRobert Wu  *
10*05767d91SRobert Wu  * Unless required by applicable law or agreed to in writing, software
11*05767d91SRobert Wu  * distributed under the License is distributed on an "AS IS" BASIS,
12*05767d91SRobert Wu  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13*05767d91SRobert Wu  * See the License for the specific language governing permissions and
14*05767d91SRobert Wu  * limitations under the License.
15*05767d91SRobert Wu  */
16*05767d91SRobert Wu 
17*05767d91SRobert Wu #include <algorithm>
18*05767d91SRobert Wu #include <unistd.h>
19*05767d91SRobert Wu 
20*05767d91SRobert Wu #include "SinkI16.h"
21*05767d91SRobert Wu 
22*05767d91SRobert Wu #if FLOWGRAPH_ANDROID_INTERNAL
23*05767d91SRobert Wu #include <audio_utils/primitives.h>
24*05767d91SRobert Wu #endif
25*05767d91SRobert Wu 
26*05767d91SRobert Wu using namespace FLOWGRAPH_OUTER_NAMESPACE::flowgraph;
27*05767d91SRobert Wu 
SinkI16(int32_t channelCount)28*05767d91SRobert Wu SinkI16::SinkI16(int32_t channelCount)
29*05767d91SRobert Wu         : FlowGraphSink(channelCount) {}
30*05767d91SRobert Wu 
read(void * data,int32_t numFrames)31*05767d91SRobert Wu int32_t SinkI16::read(void *data, int32_t numFrames) {
32*05767d91SRobert Wu     int16_t *shortData = (int16_t *) data;
33*05767d91SRobert Wu     const int32_t channelCount = input.getSamplesPerFrame();
34*05767d91SRobert Wu 
35*05767d91SRobert Wu     int32_t framesLeft = numFrames;
36*05767d91SRobert Wu     while (framesLeft > 0) {
37*05767d91SRobert Wu         // Run the graph and pull data through the input port.
38*05767d91SRobert Wu         int32_t framesRead = pullData(framesLeft);
39*05767d91SRobert Wu         if (framesRead <= 0) {
40*05767d91SRobert Wu             break;
41*05767d91SRobert Wu         }
42*05767d91SRobert Wu         const float *signal = input.getBuffer();
43*05767d91SRobert Wu         int32_t numSamples = framesRead * channelCount;
44*05767d91SRobert Wu #if FLOWGRAPH_ANDROID_INTERNAL
45*05767d91SRobert Wu         memcpy_to_i16_from_float(shortData, signal, numSamples);
46*05767d91SRobert Wu         shortData += numSamples;
47*05767d91SRobert Wu         signal += numSamples;
48*05767d91SRobert Wu #else
49*05767d91SRobert Wu         for (int i = 0; i < numSamples; i++) {
50*05767d91SRobert Wu             int32_t n = (int32_t) (*signal++ * 32768.0f);
51*05767d91SRobert Wu             *shortData++ = std::min(INT16_MAX, std::max(INT16_MIN, n)); // clip
52*05767d91SRobert Wu         }
53*05767d91SRobert Wu #endif
54*05767d91SRobert Wu         framesLeft -= framesRead;
55*05767d91SRobert Wu     }
56*05767d91SRobert Wu     return numFrames - framesLeft;
57*05767d91SRobert Wu }
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