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Update Emscripten simple playback example.

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This commit is contained in:
David Reid
2019-03-05 19:14:08 +10:00
parent 2e23db7d1a
commit f4693be9f3
1 changed files with 13 additions and 7 deletions
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examples/simple_playback_emscripten.c
+13 -7
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@@ -15,15 +15,15 @@ void main_loop__em()
#define DEVICE_CHANNELS 1 #define DEVICE_CHANNELS 1
#define DEVICE_SAMPLE_RATE 48000 #define DEVICE_SAMPLE_RATE 48000
// This is the function that's used for sending more data to the device for playback. void data_callback(mal_device* pDevice, void* pOutput, const void* pInput, mal_uint32 frameCount)
mal_uint32 on_send_frames_to_device(mal_device* pDevice, mal_uint32 frameCount, void* pSamples)
{ {
mal_assert(pDevice->channels == DEVICE_CHANNELS); (void)pInput; /* Unused. */
mal_assert(pDevice->playback.channels == DEVICE_CHANNELS);
mal_sine_wave* pSineWave = (mal_sine_wave*)pDevice->pUserData; mal_sine_wave* pSineWave = (mal_sine_wave*)pDevice->pUserData;
mal_assert(pSineWave != NULL); mal_assert(pSineWave != NULL);
return mal_sine_wave_read(pSineWave, frameCount, (float*)pSamples); mal_sine_wave_read_f32(pSineWave, frameCount, (float*)pOutput);
} }
int main(int argc, char** argv) int main(int argc, char** argv)
@@ -34,14 +34,20 @@ int main(int argc, char** argv)
mal_sine_wave sineWave; mal_sine_wave sineWave;
mal_sine_wave_init(0.2, 400, DEVICE_SAMPLE_RATE, &sineWave); mal_sine_wave_init(0.2, 400, DEVICE_SAMPLE_RATE, &sineWave);
mal_device_config config = mal_device_config_init_playback(DEVICE_FORMAT, DEVICE_CHANNELS, DEVICE_SAMPLE_RATE, on_send_frames_to_device, &sineWave); mal_device_config config = mal_device_config_init(mal_device_type_playback);
config.playback.format = DEVICE_FORMAT;
config.playback.channels = DEVICE_CHANNELS;
config.sampleRate = DEVICE_SAMPLE_RATE;
config.dataCallback = data_callback;
config.pUserData = &sineWave;
mal_device device; mal_device device;
if (mal_device_init(NULL, mal_device_type_playback, NULL, &config, &device) != MAL_SUCCESS) { if (mal_device_init(NULL, &config, &device) != MAL_SUCCESS) {
printf("Failed to open playback device.\n"); printf("Failed to open playback device.\n");
return -4; return -4;
} }
printf("Device Name: %s\n", device.name); printf("Device Name: %s\n", device.playback.name);
if (mal_device_start(&device) != MAL_SUCCESS) { if (mal_device_start(&device) != MAL_SUCCESS) {
printf("Failed to start playback device.\n"); printf("Failed to start playback device.\n");