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example: add sine_player to test audio playback

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This commit is contained in:
Matthias Ringwald 2018-10-29 09:37:53 +01:00
parent 75ba91cf9c
commit 69fa7fc678
2 changed files with 93 additions and 0 deletions
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4
example/Makefile.inc
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@ -145,6 +145,7 @@ EXAMPLES = \
sdp_bnep_query \
sdp_general_query \
sdp_rfcomm_query \
sine_player \
sm_pairing_central \
sm_pairing_peripheral \
spp_and_le_counter \
@ -322,6 +323,9 @@ le_data_channel_server: le_data_channel_server.h ${CORE_OBJ} ${COMMON_OBJ} ${ATT
mod_player: ${CORE_OBJ} ${COMMON_OBJ} ${HXCMOD_PLAYER_OBJ} btstack_audio.o mod_player.c
${CC} $^ ${CFLAGS} ${LDFLAGS} -o $@
sine_player: ${CORE_OBJ} ${COMMON_OBJ} btstack_audio.o sine_player.c
${CC} $^ ${CFLAGS} ${LDFLAGS} -o $@
nordic_spp_le_counter: nordic_spp_le_counter.h ${CORE_OBJ} ${COMMON_OBJ} ${ATT_OBJ} ${GATT_SERVER_OBJ} ${SM_OBJ} nordic_spp_service_server.o nordic_spp_le_counter.c
${CC} $(filter-out nordic_spp_le_counter.h,$^) ${CFLAGS} ${LDFLAGS} -o $@

89
example/sine_player.c Normal file
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@ -0,0 +1,89 @@
/*
* Copyright (C) 2014 BlueKitchen GmbH
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holders nor the names of
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
* 4. Any redistribution, use, or modification is done solely for
* personal benefit and not for any commercial purpose or for
* monetary gain.
*
* THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS
* RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Please inquire about commercial licensing options at
* contact@bluekitchen-gmbh.com
*
*/
/*
* Sine Playback to test and validate audio output with simple wave form
*
*/
#include "btstack.h"
#define TABLE_SIZE_441HZ 100
static int sine_phase;
static const int16_t sine_int16[] = {
0, 2057, 4107, 6140, 8149, 10126, 12062, 13952, 15786, 17557,
19260, 20886, 22431, 23886, 25247, 26509, 27666, 28714, 29648, 30466,
31163, 31738, 32187, 32509, 32702, 32767, 32702, 32509, 32187, 31738,
31163, 30466, 29648, 28714, 27666, 26509, 25247, 23886, 22431, 20886,
19260, 17557, 15786, 13952, 12062, 10126, 8149, 6140, 4107, 2057,
0, -2057, -4107, -6140, -8149, -10126, -12062, -13952, -15786, -17557,
-19260, -20886, -22431, -23886, -25247, -26509, -27666, -28714, -29648, -30466,
-31163, -31738, -32187, -32509, -32702, -32767, -32702, -32509, -32187, -31738,
-31163, -30466, -29648, -28714, -27666, -26509, -25247, -23886, -22431, -20886,
-19260, -17557, -15786, -13952, -12062, -10126, -8149, -6140, -4107, -2057,
};
static void audio_playback(int16_t * pcm_buffer, uint16_t num_samples_to_write){
int count;
for (count = 0; count < num_samples_to_write ; count++){
pcm_buffer[count * 2] = sine_int16[sine_phase];
pcm_buffer[count * 2 + 1] = sine_int16[sine_phase];
sine_phase++;
if (sine_phase >= TABLE_SIZE_441HZ){
sine_phase -= TABLE_SIZE_441HZ;
}
}
}
int btstack_main(int argc, const char * argv[]);
int btstack_main(int argc, const char * argv[]){
(void)argc;
(void)argv;
// setup audio playback
const btstack_audio_t * audio = btstack_audio_get_instance();
if (!audio){
printf("BTstack Audio not setup\n");
return 10;
}
audio->init(2, 44100, &audio_playback, NULL);
audio->start_stream();
return 0;
}