diff options
| -rw-r--r-- | ports/esp32s2/i2s_common.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/ports/esp32s2/i2s_common.c b/ports/esp32s2/i2s_common.c index d5c0facaa..ca2a3b93e 100644 --- a/ports/esp32s2/i2s_common.c +++ b/ports/esp32s2/i2s_common.c @@ -24,6 +24,8 @@ * THE SOFTWARE. */ +#include <string.h> + #include "py/runtime.h" #include "i2s_common.h" @@ -69,8 +71,17 @@ static void i2s_fill_buffer(i2s_t *self) { if (self->instance < 0 || self->instance >= I2S_NUM_MAX) { return; } - if (self->paused || !self->sample) { - i2s_zero_dma_buffer(self->instance); +#define STACK_BUFFER_SIZE (512) + int16_t signed_samples[STACK_BUFFER_SIZE / sizeof(int16_t)]; +mp_printf(&mp_plat_print, "playing=%d paused=%d stopping=%d sample@%p sample_data=%p..%p\n", self->playing, self->paused, self->stopping, self->sample, self->sample_data, self->sample_end); + + if (!self->playing || self->paused || !self->sample) { + memset(signed_samples, 0, sizeof(signed_samples)); + + size_t bytes_written = 0; + do { + ESP_CALL_RAISE(i2s_write(self->instance, signed_samples, sizeof(signed_samples), &bytes_written, 0)); + } while (bytes_written != 0); return; } while (!self->stopping) { @@ -102,7 +113,6 @@ static void i2s_fill_buffer(i2s_t *self) { ESP_CALL_RAISE(i2s_write_expand(self->instance, self->sample_data, bytecount, 8, 16, &bytes_written, 0)); } } else { -#define STACK_BUFFER_SIZE (64) const size_t bytes_per_output_frame = 4; size_t bytes_per_input_frame = self->channel_count * self->bytes_per_sample; size_t framecount = MIN(STACK_BUFFER_SIZE / bytes_per_output_frame, bytecount / bytes_per_input_frame); |