michael@0: /*
michael@0:  * Copyright © 2011 Mozilla Foundation
michael@0:  *
michael@0:  * This program is made available under an ISC-style license.  See the
michael@0:  * accompanying file LICENSE for details.
michael@0:  */
michael@0: 
michael@0: /* libcubeb api/function test. Plays a simple tone. */
michael@0: #ifdef NDEBUG
michael@0: #undef NDEBUG
michael@0: #endif
michael@0: #define _XOPEN_SOURCE 500
michael@0: #include <stdio.h>
michael@0: #include <stdlib.h>
michael@0: #include <math.h>
michael@0: #include <assert.h>
michael@0: 
michael@0: #include "cubeb/cubeb.h"
michael@0: #include "common.h"
michael@0: 
michael@0: #define SAMPLE_FREQUENCY 48000
michael@0: 
michael@0: /* store the phase of the generated waveform */
michael@0: struct cb_user_data {
michael@0:   long position;
michael@0: };
michael@0: 
michael@0: long data_cb(cubeb_stream *stream, void *user, void *buffer, long nframes)
michael@0: {
michael@0:   struct cb_user_data *u = (struct cb_user_data *)user;
michael@0:   short *b = (short *)buffer;
michael@0:   int i;
michael@0: 
michael@0:   if (stream == NULL || u == NULL)
michael@0:     return CUBEB_ERROR;
michael@0: 
michael@0:   /* generate our test tone on the fly */
michael@0:   for (i = 0; i < nframes; i++) {
michael@0:     /* North American dial tone */
michael@0:     b[i]  = 16000*sin(2*M_PI*(i + u->position)*350/SAMPLE_FREQUENCY);
michael@0:     b[i] += 16000*sin(2*M_PI*(i + u->position)*440/SAMPLE_FREQUENCY);
michael@0:     /* European dial tone */
michael@0:     /*b[i]  = 30000*sin(2*M_PI*(i + u->position)*425/SAMPLE_FREQUENCY);*/
michael@0:   }
michael@0:   /* remember our phase to avoid clicking on buffer transitions */
michael@0:   /* we'll still click if position overflows */
michael@0:   u->position += nframes;
michael@0: 
michael@0:   return nframes;
michael@0: }
michael@0: 
michael@0: void state_cb(cubeb_stream *stream, void *user, cubeb_state state)
michael@0: {
michael@0:   struct cb_user_data *u = (struct cb_user_data *)user;
michael@0: 
michael@0:   if (stream == NULL || u == NULL)
michael@0:     return;
michael@0: 
michael@0:   switch (state) {
michael@0:     case CUBEB_STATE_STARTED:
michael@0:       printf("stream started\n"); break;
michael@0:     case CUBEB_STATE_STOPPED:
michael@0:       printf("stream stopped\n"); break;
michael@0:     case CUBEB_STATE_DRAINED:
michael@0:       printf("stream drained\n"); break;
michael@0:     default:
michael@0:       printf("unknown stream state %d\n", state);
michael@0:   }
michael@0: 
michael@0:   return;
michael@0: }
michael@0: 
michael@0: int main(int argc, char *argv[])
michael@0: {
michael@0:   cubeb *ctx;
michael@0:   cubeb_stream *stream;
michael@0:   cubeb_stream_params params;
michael@0:   struct cb_user_data *user_data;
michael@0:   int ret;
michael@0: 
michael@0:   ret = cubeb_init(&ctx, "Cubeb tone example");
michael@0:   if (ret != CUBEB_OK) {
michael@0:     fprintf(stderr, "Error initializing cubeb library\n");
michael@0:     return ret;
michael@0:   }
michael@0: 
michael@0:   params.format = CUBEB_SAMPLE_S16NE;
michael@0:   params.rate = SAMPLE_FREQUENCY;
michael@0:   params.channels = 1;
michael@0: 
michael@0:   user_data = (struct cb_user_data *) malloc(sizeof(*user_data));
michael@0:   if (user_data == NULL) {
michael@0:     fprintf(stderr, "Error allocating user data\n");
michael@0:     return CUBEB_ERROR;
michael@0:   }
michael@0:   user_data->position = 0;
michael@0: 
michael@0:   ret = cubeb_stream_init(ctx, &stream, "Cubeb tone (mono)", params,
michael@0:                           250, data_cb, state_cb, user_data);
michael@0:   if (ret != CUBEB_OK) {
michael@0:     fprintf(stderr, "Error initializing cubeb stream\n");
michael@0:     return ret;
michael@0:   }
michael@0: 
michael@0:   cubeb_stream_start(stream);
michael@0:   delay(500);
michael@0:   cubeb_stream_stop(stream);
michael@0: 
michael@0:   cubeb_stream_destroy(stream);
michael@0:   cubeb_destroy(ctx);
michael@0: 
michael@0:   assert(user_data->position);
michael@0: 
michael@0:   free(user_data);
michael@0: 
michael@0:   return CUBEB_OK;
michael@0: }