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comparison: media/libcubeb/tests/test_tone.cpp
media/libcubeb/tests/test_tone.cpp
- branch
- TOR_BUG_9701
- changeset 13
- 44a2da4a2ab2
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| -1:000000000000 | 0:b9782c4bb55c |
|---|---|
| 1 /* | |
| 2 * Copyright © 2011 Mozilla Foundation | |
| 3 * | |
| 4 * This program is made available under an ISC-style license. See the | |
| 5 * accompanying file LICENSE for details. | |
| 6 */ | |
| 7 | |
| 8 /* libcubeb api/function test. Plays a simple tone. */ | |
| 9 #ifdef NDEBUG | |
| 10 #undef NDEBUG | |
| 11 #endif | |
| 12 #define _XOPEN_SOURCE 500 | |
| 13 #include <stdio.h> | |
| 14 #include <stdlib.h> | |
| 15 #include <math.h> | |
| 16 #include <assert.h> | |
| 17 | |
| 18 #include "cubeb/cubeb.h" | |
| 19 #include "common.h" | |
| 20 | |
| 21 #define SAMPLE_FREQUENCY 48000 | |
| 22 | |
| 23 /* store the phase of the generated waveform */ | |
| 24 struct cb_user_data { | |
| 25 long position; | |
| 26 }; | |
| 27 | |
| 28 long data_cb(cubeb_stream *stream, void *user, void *buffer, long nframes) | |
| 29 { | |
| 30 struct cb_user_data *u = (struct cb_user_data *)user; | |
| 31 short *b = (short *)buffer; | |
| 32 int i; | |
| 33 | |
| 34 if (stream == NULL || u == NULL) | |
| 35 return CUBEB_ERROR; | |
| 36 | |
| 37 /* generate our test tone on the fly */ | |
| 38 for (i = 0; i < nframes; i++) { | |
| 39 /* North American dial tone */ | |
| 40 b[i] = 16000*sin(2*M_PI*(i + u->position)*350/SAMPLE_FREQUENCY); | |
| 41 b[i] += 16000*sin(2*M_PI*(i + u->position)*440/SAMPLE_FREQUENCY); | |
| 42 /* European dial tone */ | |
| 43 /*b[i] = 30000*sin(2*M_PI*(i + u->position)*425/SAMPLE_FREQUENCY);*/ | |
| 44 } | |
| 45 /* remember our phase to avoid clicking on buffer transitions */ | |
| 46 /* we'll still click if position overflows */ | |
| 47 u->position += nframes; | |
| 48 | |
| 49 return nframes; | |
| 50 } | |
| 51 | |
| 52 void state_cb(cubeb_stream *stream, void *user, cubeb_state state) | |
| 53 { | |
| 54 struct cb_user_data *u = (struct cb_user_data *)user; | |
| 55 | |
| 56 if (stream == NULL || u == NULL) | |
| 57 return; | |
| 58 | |
| 59 switch (state) { | |
| 60 case CUBEB_STATE_STARTED: | |
| 61 printf("stream started\n"); break; | |
| 62 case CUBEB_STATE_STOPPED: | |
| 63 printf("stream stopped\n"); break; | |
| 64 case CUBEB_STATE_DRAINED: | |
| 65 printf("stream drained\n"); break; | |
| 66 default: | |
| 67 printf("unknown stream state %d\n", state); | |
| 68 } | |
| 69 | |
| 70 return; | |
| 71 } | |
| 72 | |
| 73 int main(int argc, char *argv[]) | |
| 74 { | |
| 75 cubeb *ctx; | |
| 76 cubeb_stream *stream; | |
| 77 cubeb_stream_params params; | |
| 78 struct cb_user_data *user_data; | |
| 79 int ret; | |
| 80 | |
| 81 ret = cubeb_init(&ctx, "Cubeb tone example"); | |
| 82 if (ret != CUBEB_OK) { | |
| 83 fprintf(stderr, "Error initializing cubeb library\n"); | |
| 84 return ret; | |
| 85 } | |
| 86 | |
| 87 params.format = CUBEB_SAMPLE_S16NE; | |
| 88 params.rate = SAMPLE_FREQUENCY; | |
| 89 params.channels = 1; | |
| 90 | |
| 91 user_data = (struct cb_user_data *) malloc(sizeof(*user_data)); | |
| 92 if (user_data == NULL) { | |
| 93 fprintf(stderr, "Error allocating user data\n"); | |
| 94 return CUBEB_ERROR; | |
| 95 } | |
| 96 user_data->position = 0; | |
| 97 | |
| 98 ret = cubeb_stream_init(ctx, &stream, "Cubeb tone (mono)", params, | |
| 99 250, data_cb, state_cb, user_data); | |
| 100 if (ret != CUBEB_OK) { | |
| 101 fprintf(stderr, "Error initializing cubeb stream\n"); | |
| 102 return ret; | |
| 103 } | |
| 104 | |
| 105 cubeb_stream_start(stream); | |
| 106 delay(500); | |
| 107 cubeb_stream_stop(stream); | |
| 108 | |
| 109 cubeb_stream_destroy(stream); | |
| 110 cubeb_destroy(ctx); | |
| 111 | |
| 112 assert(user_data->position); | |
| 113 | |
| 114 free(user_data); | |
| 115 | |
| 116 return CUBEB_OK; | |
| 117 } |
