content/media/compiledtest/TestAudioMixer.cpp@7e26c7da4463
content/media/compiledtest/TestAudioMixer.cpp
Wed, 31 Dec 2014 06:55:50 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:55:50 +0100
- changeset 2
- 7e26c7da4463
- permissions
- -rw-r--r--
Added tag UPSTREAM_283F7C6 for changeset ca08bd8f51b2
1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* This Source Code Form is subject to the terms of the Mozilla Public
3 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
4 * You can obtain one at http://mozilla.org/MPL/2.0/. */
6 #include "AudioMixer.h"
7 #include <assert.h>
9 using mozilla::AudioDataValue;
10 using mozilla::AudioSampleFormat;
12 /* In this test, the different audio stream and channels are always created to
13 * cancel each other. */
14 void MixingDone(AudioDataValue* aData, AudioSampleFormat aFormat, uint32_t aChannels, uint32_t aFrames, uint32_t aSampleRate)
15 {
16 bool silent = true;
17 for (uint32_t i = 0; i < aChannels * aFrames; i++) {
18 if (aData[i] != 0.0) {
19 if (aFormat == mozilla::AUDIO_FORMAT_S16) {
20 fprintf(stderr, "Sample at %d is not silent: %d\n", i, (short)aData[i]);
21 } else {
22 fprintf(stderr, "Sample at %d is not silent: %f\n", i, (float)aData[i]);
23 }
24 silent = false;
25 }
26 }
27 if (!silent) {
28 MOZ_CRASH();
29 }
30 }
32 /* Helper function to give us the maximum and minimum value that don't clip,
33 * for a given sample format (integer or floating-point). */
34 template<typename T>
35 T GetLowValue();
37 template<typename T>
38 T GetHighValue();
40 template<>
41 float GetLowValue<float>() {
42 return -1.0;
43 }
45 template<>
46 short GetLowValue<short>() {
47 return -INT16_MAX;
48 }
50 template<>
51 float GetHighValue<float>() {
52 return 1.0;
53 }
55 template<>
56 short GetHighValue<short>() {
57 return INT16_MAX;
58 }
60 void FillBuffer(AudioDataValue* aBuffer, uint32_t aLength, AudioDataValue aValue)
61 {
62 AudioDataValue* end = aBuffer + aLength;
63 while (aBuffer != end) {
64 *aBuffer++ = aValue;
65 }
66 }
68 int main(int argc, char* argv[]) {
69 const uint32_t CHANNEL_LENGTH = 256;
70 const uint32_t AUDIO_RATE = 44100;
71 AudioDataValue a[CHANNEL_LENGTH * 2];
72 AudioDataValue b[CHANNEL_LENGTH * 2];
73 FillBuffer(a, CHANNEL_LENGTH, GetLowValue<AudioDataValue>());
74 FillBuffer(a + CHANNEL_LENGTH, CHANNEL_LENGTH, GetHighValue<AudioDataValue>());
75 FillBuffer(b, CHANNEL_LENGTH, GetHighValue<AudioDataValue>());
76 FillBuffer(b + CHANNEL_LENGTH, CHANNEL_LENGTH, GetLowValue<AudioDataValue>());
78 {
79 int iterations = 2;
80 mozilla::AudioMixer mixer(MixingDone);
82 fprintf(stderr, "Test AudioMixer constant buffer length.\n");
84 while (iterations--) {
85 mixer.Mix(a, 2, CHANNEL_LENGTH, AUDIO_RATE);
86 mixer.Mix(b, 2, CHANNEL_LENGTH, AUDIO_RATE);
87 mixer.FinishMixing();
88 }
89 }
91 {
92 mozilla::AudioMixer mixer(MixingDone);
94 fprintf(stderr, "Test AudioMixer variable buffer length.\n");
96 FillBuffer(a, CHANNEL_LENGTH / 2, GetLowValue<AudioDataValue>());
97 FillBuffer(a + CHANNEL_LENGTH / 2, CHANNEL_LENGTH / 2, GetLowValue<AudioDataValue>());
98 FillBuffer(b, CHANNEL_LENGTH / 2, GetHighValue<AudioDataValue>());
99 FillBuffer(b + CHANNEL_LENGTH / 2, CHANNEL_LENGTH / 2, GetHighValue<AudioDataValue>());
100 mixer.Mix(a, 2, CHANNEL_LENGTH / 2, AUDIO_RATE);
101 mixer.Mix(b, 2, CHANNEL_LENGTH / 2, AUDIO_RATE);
102 mixer.FinishMixing();
103 FillBuffer(a, CHANNEL_LENGTH, GetLowValue<AudioDataValue>());
104 FillBuffer(a + CHANNEL_LENGTH, CHANNEL_LENGTH, GetHighValue<AudioDataValue>());
105 FillBuffer(b, CHANNEL_LENGTH, GetHighValue<AudioDataValue>());
106 FillBuffer(b + CHANNEL_LENGTH, CHANNEL_LENGTH, GetLowValue<AudioDataValue>());
107 mixer.Mix(a, 2, CHANNEL_LENGTH, AUDIO_RATE);
108 mixer.Mix(b, 2, CHANNEL_LENGTH, AUDIO_RATE);
109 mixer.FinishMixing();
110 FillBuffer(a, CHANNEL_LENGTH / 2, GetLowValue<AudioDataValue>());
111 FillBuffer(a + CHANNEL_LENGTH / 2, CHANNEL_LENGTH / 2, GetLowValue<AudioDataValue>());
112 FillBuffer(b, CHANNEL_LENGTH / 2, GetHighValue<AudioDataValue>());
113 FillBuffer(b + CHANNEL_LENGTH / 2, CHANNEL_LENGTH / 2, GetHighValue<AudioDataValue>());
114 mixer.Mix(a, 2, CHANNEL_LENGTH / 2, AUDIO_RATE);
115 mixer.Mix(b, 2, CHANNEL_LENGTH / 2, AUDIO_RATE);
116 mixer.FinishMixing();
117 }
119 FillBuffer(a, CHANNEL_LENGTH, GetLowValue<AudioDataValue>());
120 FillBuffer(b, CHANNEL_LENGTH, GetHighValue<AudioDataValue>());
122 {
123 mozilla::AudioMixer mixer(MixingDone);
124 fprintf(stderr, "Test AudioMixer variable channel count.\n");
126 mixer.Mix(a, 1, CHANNEL_LENGTH, AUDIO_RATE);
127 mixer.Mix(b, 1, CHANNEL_LENGTH, AUDIO_RATE);
128 mixer.FinishMixing();
129 mixer.Mix(a, 1, CHANNEL_LENGTH, AUDIO_RATE);
130 mixer.Mix(b, 1, CHANNEL_LENGTH, AUDIO_RATE);
131 mixer.FinishMixing();
132 mixer.Mix(a, 1, CHANNEL_LENGTH, AUDIO_RATE);
133 mixer.Mix(b, 1, CHANNEL_LENGTH, AUDIO_RATE);
134 mixer.FinishMixing();
135 }
137 {
138 mozilla::AudioMixer mixer(MixingDone);
139 fprintf(stderr, "Test AudioMixer variable stream count.\n");
141 mixer.Mix(a, 2, CHANNEL_LENGTH, AUDIO_RATE);
142 mixer.Mix(b, 2, CHANNEL_LENGTH, AUDIO_RATE);
143 mixer.FinishMixing();
144 mixer.Mix(a, 2, CHANNEL_LENGTH, AUDIO_RATE);
145 mixer.Mix(b, 2, CHANNEL_LENGTH, AUDIO_RATE);
146 mixer.Mix(a, 2, CHANNEL_LENGTH, AUDIO_RATE);
147 mixer.Mix(b, 2, CHANNEL_LENGTH, AUDIO_RATE);
148 mixer.FinishMixing();
149 mixer.Mix(a, 2, CHANNEL_LENGTH, AUDIO_RATE);
150 mixer.Mix(b, 2, CHANNEL_LENGTH, AUDIO_RATE);
151 mixer.FinishMixing();
152 }
154 return 0;
155 }
