1 /*---------------------------------------------------------------------------*
2 * AudioInRecord.c *
3 * *
4 * Copyright 2007, 2008 Nuance Communciations, Inc. *
5 * *
6 * Licensed under the Apache License, Version 2.0 (the 'License'); *
7 * you may not use this file except in compliance with the License. *
8 * *
9 * You may obtain a copy of the License at *
10 * http://www.apache.org/licenses/LICENSE-2.0 *
11 * *
12 * Unless required by applicable law or agreed to in writing, software *
13 * distributed under the License is distributed on an 'AS IS' BASIS, *
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *
15 * See the License for the specific language governing permissions and *
16 * limitations under the License. *
17 * *
18 *---------------------------------------------------------------------------*/
19
20 #include <stdlib.h>
21 #include <stdio.h>
22 #include <limits.h>
23 #include <string.h>
24 #ifdef WIN32
25 #include <windows.h>
26 #include <mmsystem.h>
27 #endif
28 #include "audioin.h"
29
30 #define SAMPLING_RATE 11025
31
32 #define N_FRAMES_PER_BUFFER 512 /* low-level driver counts in terms of frames, not samples */
33 #define N_TUPLES_PER_FRAME 1 /* tuple: a set of samples (set of 1 if mono, set of 2 if stereo */
34 #define N_CHANNELS_PER_TUPLE 1 /* 1: mono; 2: stereo */
35
36 #define N_TUPLES_PER_BUFFER (N_FRAMES_PER_BUFFER * N_TUPLES_PER_FRAME)
37 #define N_SAMPLES_PER_BUFFER (N_TUPLES_PER_BUFFER * N_CHANNELS_PER_TUPLE)
38
39 #define N_SECONDS_TO_RECORD 10
40 #define N_SAMPLES_TO_RECORD (N_SECONDS_TO_RECORD * SAMPLING_RATE * N_CHANNELS_PER_TUPLE)
41
42 #define OUTPUT_FILENAME "output_AudioInRecord.pcm"
43
44 typedef short typeSample;
45
46 /* store incoming samples here, then write to file at the end */
47 typeSample recordedSamples[N_SAMPLES_TO_RECORD];
48
49
main(int argc,char * argv[])50 int main(int argc, char* argv[])
51 {
52 AUDIOIN_H hAudioIn;
53 AUDIOIN_INFO AudioInInfo;
54 LHS_AUDIOIN_ERROR lhsErr;
55 unsigned int nSamples;
56
57 printf("\nAudioTestRecord: capturing %u seconds of audio at %u Hz\n\n", N_SECONDS_TO_RECORD, SAMPLING_RATE);
58
59 memset(recordedSamples, 0, N_SAMPLES_TO_RECORD * sizeof(typeSample));
60
61 printf("Opening the AudioIn device: ");
62 lhsErr = lhs_audioinOpen(WAVE_MAPPER, SAMPLING_RATE, &hAudioIn);
63 printf("lhs_audioinOpen() returns %ld\n", lhsErr);
64 if (lhsErr != LHS_AUDIOIN_OK)
65 {
66 printf("ERROR: Unable to open audio device\n\n");
67 return 1;
68 }
69
70 printf("Starting the AudioIn device: ");
71 lhsErr = lhs_audioinStart(hAudioIn);
72 printf("lhs_audioinStart() returns %ld\n", lhsErr);
73 if (lhsErr != LHS_AUDIOIN_OK)
74 {
75 printf("ERROR: Unable to start audio device\n\n");
76 printf("Closing the AudioIn device: ");
77 lhsErr = lhs_audioinClose(&hAudioIn);
78 printf("lhs_audioinClose() returns %ld\n", lhsErr);
79 if (lhsErr != LHS_AUDIOIN_OK)
80 {
81 printf("ERROR: Unable to close audio device\n\n");
82 return 1;
83 }
84 return 1;
85 }
86
87 printf("... Start Speaking ...\n");
88
89 nSamples = 0;
90 while (nSamples <= N_SAMPLES_TO_RECORD - N_SAMPLES_PER_BUFFER)
91 {
92 unsigned long u32NbrOfSamples;
93
94 u32NbrOfSamples = N_SAMPLES_PER_BUFFER / N_CHANNELS_PER_TUPLE; /* audioin only does mono */
95 lhsErr = lhs_audioinGetSamples(hAudioIn, &u32NbrOfSamples, &(recordedSamples[nSamples]), &AudioInInfo);
96 if (lhsErr == LHS_AUDIOIN_OK)
97 nSamples += u32NbrOfSamples;
98 else
99 printf("ERROR: lhs_audioinGetSamples() returns %ld\n", lhsErr);
100 }
101
102 printf("Stopping the AudioIn device: ");
103 lhsErr = lhs_audioinStop(hAudioIn);
104 printf("lhs_audioinStop() returns %ld\n", lhsErr);
105 if (lhsErr != LHS_AUDIOIN_OK)
106 {
107 printf("ERROR: Unable to stop audio device\n\n");
108 printf("Closing the AudioIn device: ");
109 lhsErr = lhs_audioinClose(&hAudioIn);
110 printf("lhs_audioinClose() returns %ld\n", lhsErr);
111 if (lhsErr != LHS_AUDIOIN_OK)
112 {
113 printf("ERROR: Unable to close audio device\n\n");
114 return 1;
115 }
116 return 1;
117 }
118
119 printf("Closing the AudioIn device: ");
120 lhsErr = lhs_audioinClose(&hAudioIn);
121 printf("lhs_audioinClose() returns %ld\n", lhsErr);
122 if (lhsErr != LHS_AUDIOIN_OK)
123 {
124 printf("ERROR: Unable to close audio device\n\n");
125 return 1;
126 }
127
128 /* write to file */
129 {
130 FILE *fpOutput;
131 char *szFilename = OUTPUT_FILENAME;
132
133 fpOutput = fopen(szFilename, "wb");
134 if (fpOutput == NULL)
135 {
136 printf("ERROR: cannot create output file: '%s'\n", szFilename);
137 return 1;
138 }
139 fwrite(recordedSamples, sizeof(typeSample), nSamples, fpOutput);
140 fclose(fpOutput);
141
142 printf("\nOutput audio saved to '%s'\n\n", szFilename);
143 }
144
145
146 return 0;
147 }
148