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This commit is contained in:
Eduard Iten
2026-02-27 16:22:11 +01:00
parent 125d11fa46
commit 09a2d1d82d
10 changed files with 218 additions and 40 deletions
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12
firmware/src/audio.c
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@@ -38,7 +38,7 @@ K_SEM_DEFINE(audio_ready_sem, 0, 1);
static const struct device *const i2s_dev = DEVICE_DT_GET(I2S_NODE);
static const struct gpio_dt_spec amp_en_dev = GPIO_DT_SPEC_GET(AUDIO_AMP_ENABLE_NODE, gpios);
static volatile int current_volume = 8;
static volatile bool abort_playback = false;
static char next_random_filename[64] = {0};
@@ -219,6 +219,8 @@ void audio_thread(void *arg1, void *arg2, void *arg3)
bool trigger_started = false;
int queued_blocks = 0;
uint8_t factor = MIN(255, current_volume * 0xFF / 100);
LOG_INF("Volume factor: %u (for volume %d%%)", factor, current_volume);
while (!abort_playback)
{
@@ -234,7 +236,7 @@ void audio_thread(void *arg1, void *arg2, void *arg3)
if (abort_playback)
{
k_mem_slab_free(&audio_slab, &block);
k_mem_slab_free(&audio_slab, block);
break;
}
@@ -242,7 +244,7 @@ void audio_thread(void *arg1, void *arg2, void *arg3)
if (bytes_read <= 0)
{
k_mem_slab_free(&audio_slab, &block);
k_mem_slab_free(&audio_slab, block);
break;
}
@@ -252,7 +254,7 @@ void audio_thread(void *arg1, void *arg2, void *arg3)
for (int i = samples_read - 1; i >= 0; i--)
{
int16_t sample = samples[i];
int16_t sample = (samples[i] * factor) >> 8; // Lautstärkeanpassung
samples[i * 2] = sample;
samples[i * 2 + 1] = sample;
}
@@ -267,7 +269,7 @@ void audio_thread(void *arg1, void *arg2, void *arg3)
/* Block in die DMA-Queue schieben */
if (i2s_write(i2s_dev, block, AUDIO_BLOCK_SIZE) < 0)
{
k_mem_slab_free(&audio_slab, &block);
k_mem_slab_free(&audio_slab, block);
break;
}