diff options
Diffstat (limited to 'axfer')
| -rw-r--r-- | axfer/xfer-libasound-irq-mmap.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/axfer/xfer-libasound-irq-mmap.c b/axfer/xfer-libasound-irq-mmap.c index 71ee79f..a13b3c3 100644 --- a/axfer/xfer-libasound-irq-mmap.c +++ b/axfer/xfer-libasound-irq-mmap.c @@ -82,10 +82,28 @@ static int irq_mmap_process_frames(struct libasound_state *state, int err; if (state->use_waiter) { + unsigned int msec_per_buffer; unsigned short revents; + // Wait during msec equivalent to all audio data frames in + // buffer instead of period, for safe. + err = snd_pcm_hw_params_get_buffer_time(state->hw_params, + &msec_per_buffer, NULL); + if (err < 0) + return err; + msec_per_buffer /= 1000; + // Wait for hardware IRQ when no avail space in buffer. - err = xfer_libasound_wait_event(state, -1, &revents); + err = xfer_libasound_wait_event(state, msec_per_buffer, + &revents); + if (err == -ETIMEDOUT) { + logging(state, + "No event occurs for PCM substream during %u " + "msec. The implementaion of kernel driver or " + "userland backend causes this issue.\n", + msec_per_buffer); + return err; + } if (err < 0) return err; if (revents & POLLERR) { |