diff options
| -rw-r--r-- | ports/nrf/common-hal/audiobusio/I2SOut.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/ports/nrf/common-hal/audiobusio/I2SOut.c b/ports/nrf/common-hal/audiobusio/I2SOut.c index e167e964f..ac369277f 100644 --- a/ports/nrf/common-hal/audiobusio/I2SOut.c +++ b/ports/nrf/common-hal/audiobusio/I2SOut.c @@ -247,12 +247,14 @@ void common_hal_audiobusio_i2sout_play(audiobusio_i2sout_obj_t* self, self->samples_signed = samples_signed; choose_i2s_clocking(self, sample_rate); - /* Allocate buffers based on a maximum duration */ - enum { buffer_length_ms = 8 }; - self->buffer_length = MAX( - 2*max_buffer_length, - sample_rate * buffer_length_ms * self->bytes_per_sample - * self->channel_count / 1000); + /* Allocate buffers based on a maximum duration + * This duration was chosen empirically based on what would + * cause os.listdir('') to cause stuttering. It seems like a + * rather long time. + */ + enum { buffer_length_ms = 16 }; + self->buffer_length = sample_rate * buffer_length_ms + * self->bytes_per_sample * self->channel_count / 1000; self->buffer_length = (self->buffer_length + 3) & ~3; self->buffers[0] = m_malloc(self->buffer_length, false); self->buffers[1] = m_malloc(self->buffer_length, false); |