1 /*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 // Test program for audio_utils FIFO library.
18 // This only tests the single-threaded aspects, not the barriers.
19
20 #include <limits.h>
21 #include <stdlib.h>
22 #include <string.h>
23 #include <audio_utils/fifo.h>
24 #include <audio_utils/sndfile.h>
25
main(int argc,char ** argv)26 int main(int argc, char **argv)
27 {
28 size_t frameCount = 256;
29 size_t maxFramesPerRead = 1;
30 size_t maxFramesPerWrite = 1;
31 int i;
32 for (i = 1; i < argc; i++) {
33 char *arg = argv[i];
34 if (arg[0] != '-')
35 break;
36 switch (arg[1]) {
37 case 'c': // FIFO frame count
38 frameCount = atoi(&arg[2]);
39 break;
40 case 'r': // maximum frame count per read from FIFO
41 maxFramesPerRead = atoi(&arg[2]);
42 break;
43 case 'w': // maximum frame count per write to FIFO
44 maxFramesPerWrite = atoi(&arg[2]);
45 break;
46 default:
47 fprintf(stderr, "%s: unknown option %s\n", argv[0], arg);
48 goto usage;
49 }
50 }
51
52 if (argc - i != 2) {
53 usage:
54 fprintf(stderr, "usage: %s [-c#] in.wav out.wav\n", argv[0]);
55 return EXIT_FAILURE;
56 }
57 char *inputFile = argv[i];
58 char *outputFile = argv[i+1];
59
60 SF_INFO sfinfoin;
61 memset(&sfinfoin, 0, sizeof(sfinfoin));
62 SNDFILE *sfin = sf_open(inputFile, SFM_READ, &sfinfoin);
63 if (sfin == NULL) {
64 perror(inputFile);
65 return EXIT_FAILURE;
66 }
67 // sf_readf_short() does conversion, so not strictly necessary to check the file format.
68 // But I want to do "cmp" on input and output files afterwards,
69 // and it is easier if they are all the same format.
70 // Enforcing that everything is 16-bit is convenient for this.
71 if ((sfinfoin.format & (SF_FORMAT_TYPEMASK | SF_FORMAT_SUBMASK)) !=
72 (SF_FORMAT_WAV | SF_FORMAT_PCM_16)) {
73 fprintf(stderr, "%s: unsupported format\n", inputFile);
74 sf_close(sfin);
75 return EXIT_FAILURE;
76 }
77 size_t frameSize = sizeof(short) * sfinfoin.channels;
78 short *inputBuffer = new short[sfinfoin.frames * sfinfoin.channels];
79 sf_count_t actualRead = sf_readf_short(sfin, inputBuffer, sfinfoin.frames);
80 if (actualRead != sfinfoin.frames) {
81 fprintf(stderr, "%s: unexpected EOF or error\n", inputFile);
82 sf_close(sfin);
83 return EXIT_FAILURE;
84 }
85 sf_close(sfin);
86
87 short *outputBuffer = new short[sfinfoin.frames * sfinfoin.channels];
88 size_t framesWritten = 0;
89 size_t framesRead = 0;
90 struct audio_utils_fifo fifo;
91 short *fifoBuffer = new short[frameCount * sfinfoin.channels];
92 audio_utils_fifo_init(&fifo, frameCount, frameSize, fifoBuffer);
93 int fifoWriteCount = 0, fifoReadCount = 0;
94 int fifoFillLevel = 0, minFillLevel = INT_MAX, maxFillLevel = INT_MIN;
95 for (;;) {
96 size_t framesToWrite = sfinfoin.frames - framesWritten;
97 size_t framesToRead = sfinfoin.frames - framesRead;
98 if (framesToWrite == 0 && framesToRead == 0) {
99 break;
100 }
101
102 if (framesToWrite > maxFramesPerWrite) {
103 framesToWrite = maxFramesPerWrite;
104 }
105 framesToWrite = rand() % (framesToWrite + 1);
106 ssize_t actualWritten = audio_utils_fifo_write(&fifo,
107 &inputBuffer[framesWritten * sfinfoin.channels], framesToWrite);
108 if (actualWritten < 0 || (size_t) actualWritten > framesToWrite) {
109 fprintf(stderr, "write to FIFO failed\n");
110 break;
111 }
112 framesWritten += actualWritten;
113 if (actualWritten > 0) {
114 fifoWriteCount++;
115 }
116 fifoFillLevel += actualWritten;
117 if (fifoFillLevel > maxFillLevel) {
118 maxFillLevel = fifoFillLevel;
119 if (maxFillLevel > (int) frameCount)
120 abort();
121 }
122
123 if (framesToRead > maxFramesPerRead) {
124 framesToRead = maxFramesPerRead;
125 }
126 framesToRead = rand() % (framesToRead + 1);
127 ssize_t actualRead = audio_utils_fifo_read(&fifo,
128 &outputBuffer[framesRead * sfinfoin.channels], framesToRead);
129 if (actualRead < 0 || (size_t) actualRead > framesToRead) {
130 fprintf(stderr, "read from FIFO failed\n");
131 break;
132 }
133 framesRead += actualRead;
134 if (actualRead > 0) {
135 fifoReadCount++;
136 }
137 fifoFillLevel -= actualRead;
138 if (fifoFillLevel < minFillLevel) {
139 minFillLevel = fifoFillLevel;
140 if (minFillLevel < 0)
141 abort();
142 }
143 }
144 printf("FIFO non-empty writes: %d, non-empty reads: %d\n", fifoWriteCount, fifoReadCount);
145 printf("fill=%d, min=%d, max=%d\n", fifoFillLevel, minFillLevel, maxFillLevel);
146 audio_utils_fifo_deinit(&fifo);
147 delete[] fifoBuffer;
148
149 SF_INFO sfinfoout;
150 memset(&sfinfoout, 0, sizeof(sfinfoout));
151 sfinfoout.samplerate = sfinfoin.samplerate;
152 sfinfoout.channels = sfinfoin.channels;
153 sfinfoout.format = sfinfoin.format;
154 SNDFILE *sfout = sf_open(outputFile, SFM_WRITE, &sfinfoout);
155 if (sfout == NULL) {
156 perror(outputFile);
157 return EXIT_FAILURE;
158 }
159 sf_count_t actualWritten = sf_writef_short(sfout, outputBuffer, framesRead);
160 delete[] inputBuffer;
161 delete[] outputBuffer;
162 if (actualWritten != (sf_count_t) framesRead) {
163 fprintf(stderr, "%s: unexpected error\n", outputFile);
164 sf_close(sfout);
165 return EXIT_FAILURE;
166 }
167 sf_close(sfout);
168 return EXIT_SUCCESS;
169 }
170