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 <errno.h>
21 #include <limits.h>
22 #include <stdlib.h>
23 #include <string.h>
24 #include <audio_utils/fifo.h>
25 #include <audio_utils/sndfile.h>
26 
27 #ifndef min
28 #define min(x, y) (((x) < (y)) ? (x) : (y))
29 #endif
30 
main(int argc,char ** argv)31 int main(int argc, char **argv)
32 {
33     size_t frameCount = 0;
34     size_t maxFramesPerRead = 0;
35     size_t maxFramesPerWrite = 0;
36     bool readerThrottlesWriter = true;
37     bool verbose = false;
38     int i;
39     for (i = 1; i < argc; i++) {
40         char *arg = argv[i];
41         if (arg[0] != '-')
42             break;
43         switch (arg[1]) {
44         case 'f':   // FIFO frame count
45             frameCount = atoi(&arg[2]);
46             break;
47         case 'r':   // maximum frame count per read from FIFO
48             maxFramesPerRead = atoi(&arg[2]);
49             break;
50         case 't':   // disable throttling of writer by reader
51             readerThrottlesWriter = false;
52             break;
53         case 'v':   // enable verbose logging
54             verbose = true;
55             break;
56         case 'w':   // maximum frame count per write to FIFO
57             maxFramesPerWrite = atoi(&arg[2]);
58             break;
59         default:
60             fprintf(stderr, "%s: unknown option %s\n", argv[0], arg);
61             goto usage;
62         }
63     }
64     if (frameCount == 0) {
65         frameCount = 256;
66     }
67     if (maxFramesPerRead == 0) {
68         maxFramesPerRead = frameCount;
69     }
70     if (maxFramesPerWrite == 0) {
71         maxFramesPerWrite = frameCount;
72     }
73 
74     if (argc - i != 2) {
75 usage:
76         fprintf(stderr, "usage: %s [-f#] [-r#] [-t] [-v] [-w#] in.wav out.wav\n", argv[0]);
77         return EXIT_FAILURE;
78     }
79     char *inputFile = argv[i];
80     char *outputFile = argv[i+1];
81 
82     SF_INFO sfinfoin;
83     memset(&sfinfoin, 0, sizeof(sfinfoin));
84     SNDFILE *sfin = sf_open(inputFile, SFM_READ, &sfinfoin);
85     if (sfin == NULL) {
86         perror(inputFile);
87         return EXIT_FAILURE;
88     }
89     switch (sfinfoin.format & (SF_FORMAT_TYPEMASK | SF_FORMAT_SUBMASK)) {
90     case SF_FORMAT_WAV | SF_FORMAT_PCM_16:
91     case SF_FORMAT_WAV | SF_FORMAT_PCM_U8:
92         break;
93     default:
94         fprintf(stderr, "%s: unsupported format\n", inputFile);
95         sf_close(sfin);
96         return EXIT_FAILURE;
97     }
98     size_t frameSize = sizeof(int16_t) * sfinfoin.channels;
99     int16_t *inputBuffer = new int16_t[sfinfoin.frames * sfinfoin.channels];
100     sf_count_t actualRead = sf_readf_short(sfin, inputBuffer, sfinfoin.frames);
101     if (actualRead != sfinfoin.frames) {
102         fprintf(stderr, "%s: unexpected EOF or error\n", inputFile);
103         sf_close(sfin);
104         return EXIT_FAILURE;
105     }
106     sf_close(sfin);
107 
108     int16_t *outputBuffer = new int16_t[sfinfoin.frames * sfinfoin.channels];
109     size_t framesWritten = 0;
110     size_t framesRead = 0;
111     int16_t *fifoBuffer = new int16_t[frameCount * sfinfoin.channels];
112     audio_utils_fifo fifo(frameCount, frameSize, fifoBuffer, readerThrottlesWriter);
113     audio_utils_fifo_writer fifoWriter(fifo);
114     audio_utils_fifo_reader fifoReader(fifo, readerThrottlesWriter);
115     int fifoWriteCount = 0, fifoReadCount = 0;
116     int fifoFillLevel = 0, minFillLevel = INT_MAX, maxFillLevel = INT_MIN;
117     for (;;) {
118         size_t framesToWrite = sfinfoin.frames - framesWritten;
119         size_t framesToRead = sfinfoin.frames - framesRead;
120         if (framesToWrite == 0 && (framesToRead == 0 || !readerThrottlesWriter)) {
121             break;
122         }
123 
124         if (framesToWrite > maxFramesPerWrite) {
125             framesToWrite = maxFramesPerWrite;
126         }
127         framesToWrite = rand() % (framesToWrite + 1);
128         ssize_t actualWritten = fifoWriter.write(
129                 &inputBuffer[framesWritten * sfinfoin.channels], framesToWrite);
130         if (verbose) {
131             printf("wrote %d out of %d\n", (int) actualWritten, (int) framesToWrite);
132         }
133         if (actualWritten < 0 || (size_t) actualWritten > framesToWrite) {
134             fprintf(stderr, "write to FIFO failed\n");
135             break;
136         }
137         if (actualWritten < min((int) frameCount - fifoFillLevel, (int) framesToWrite)) {
138             fprintf(stderr, "only wrote %d when should have written min(%d, %d)\n",
139                     (int) actualWritten, (int) frameCount - fifoFillLevel, (int) framesToWrite);
140         }
141         framesWritten += actualWritten;
142         if (actualWritten > 0) {
143             fifoWriteCount++;
144         }
145         fifoFillLevel += actualWritten;
146         if (verbose) {
147             printf("fill level after write %d\n", fifoFillLevel);
148         }
149         if (fifoFillLevel > maxFillLevel) {
150             maxFillLevel = fifoFillLevel;
151             if (maxFillLevel > (int) frameCount) {
152                 if (readerThrottlesWriter) {
153                     printf("maxFillLevel=%d > frameCount=%d\n", maxFillLevel, (int) frameCount);
154                     abort();
155                 }
156             }
157         }
158 
159         if (framesToRead > maxFramesPerRead) {
160             framesToRead = maxFramesPerRead;
161         }
162         framesToRead = rand() % (framesToRead + 1);
163         ssize_t actualRead = fifoReader.read(
164                 &outputBuffer[framesRead * sfinfoin.channels], framesToRead);
165         if (verbose) {
166             printf("read %d out of %d\n", (int) actualRead, (int) framesToRead);
167         }
168         if (actualRead < 0 || (size_t) actualRead > framesToRead) {
169             switch (actualRead) {
170             case -EIO:
171                 fprintf(stderr, "read from FIFO failed: corrupted indices\n");
172                 abort();
173                 break;
174             case -EOVERFLOW:
175                 if (readerThrottlesWriter) {
176                     fprintf(stderr, "read from FIFO failed: unexpected overflow\n");
177                     abort();
178                 }
179                 printf("warning: reader lost frames\n");
180                 actualRead = 0;
181                 break;
182             default:
183                 if (actualRead < 0) {
184                     fprintf(stderr, "read from FIFO failed: unexpected error code %d\n",
185                             (int) actualRead);
186                 } else {
187                     fprintf(stderr, "read from FIFO failed: actualRead=%d > framesToRead=%d\n",
188                             (int) actualRead, (int) framesToRead);
189                 }
190                 abort();
191             }
192         }
193         if (actualRead < min(fifoFillLevel, (int) framesToRead)) {
194             //fprintf(stderr, "only read %d when should have read min(%d, %d)\n",
195             //        (int) actualRead, fifoFillLevel, (int) framesToRead);
196         }
197         framesRead += actualRead;
198         if (actualRead > 0) {
199             fifoReadCount++;
200         }
201         fifoFillLevel -= actualRead;
202         if (verbose) {
203             printf("fill level after read %d\n", fifoFillLevel);
204         }
205         if (fifoFillLevel < minFillLevel) {
206             minFillLevel = fifoFillLevel;
207             if (minFillLevel < 0) {
208                 printf("minFillLevel=%d < 0\n", minFillLevel);
209                 abort();
210             }
211         }
212     }
213     delete[] inputBuffer;
214     inputBuffer = NULL;
215     delete[] fifoBuffer;
216     fifoBuffer = NULL;
217 
218     printf("FIFO non-empty writes: %d, non-empty reads: %d\n", fifoWriteCount, fifoReadCount);
219     printf("fill=%d, min=%d, max=%d\n", fifoFillLevel, minFillLevel, maxFillLevel);
220 
221     printf("writing output\n");
222     SF_INFO sfinfoout;
223     memset(&sfinfoout, 0, sizeof(sfinfoout));
224     sfinfoout.samplerate = sfinfoin.samplerate;
225     sfinfoout.channels = sfinfoin.channels;
226     sfinfoout.format = sfinfoin.format;
227     SNDFILE *sfout = sf_open(outputFile, SFM_WRITE, &sfinfoout);
228     if (sfout == NULL) {
229         perror(outputFile);
230         return EXIT_FAILURE;
231     }
232     sf_count_t actualWritten = sf_writef_short(sfout, outputBuffer, framesRead);
233     delete[] outputBuffer;
234     outputBuffer = NULL;
235 
236     if (actualWritten != (sf_count_t) framesRead) {
237         fprintf(stderr, "%s: unexpected error\n", outputFile);
238         sf_close(sfout);
239         return EXIT_FAILURE;
240     }
241     sf_close(sfout);
242     printf("done\n");
243 
244     return EXIT_SUCCESS;
245 }
246