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alsa: disable rewinds when using ALSA plugins

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This is required to when playing on a52: device, rewind is broken
in those plugins.
Credits to Michael Rans <mcarans@yahoo.co.uk> for finding this
workaround, and Tanu Kaskinen <tanuk@iki.fi> for providing
valuable feedback.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@intel.com>
This commit is contained in:
Pierre-Louis Bossart 2010-07-13 15:27:40 -05:00 • committed by Colin Guthrie
parent 3ede7e4c01
commit cb55b00ccd
1 changed files with 12 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

14
src/modules/alsa/alsa-sink.c
View file

@ -953,7 +953,12 @@ static int update_sw_params(struct userdata *u) {
}
pa_sink_set_max_request_within_thread(u->sink, u->hwbuf_size - u->hwbuf_unused);
pa_sink_set_max_rewind_within_thread(u->sink, u->hwbuf_size);
if (pa_alsa_pcm_is_hw(u->pcm_handle))
pa_sink_set_max_rewind_within_thread(u->sink, u->hwbuf_size);
else {
pa_log_info("Disabling rewind_within_thread for device %s", u->device_name);
pa_sink_set_max_rewind_within_thread(u->sink, 0);
}
return 0;
}
@ -1906,7 +1911,12 @@ pa_sink *pa_alsa_sink_new(pa_module *m, pa_modargs *ma, const char*driver, pa_ca
(double) pa_bytes_to_usec(u->hwbuf_size, &ss) / PA_USEC_PER_MSEC);
pa_sink_set_max_request(u->sink, u->hwbuf_size);
pa_sink_set_max_rewind(u->sink, u->hwbuf_size);
if (pa_alsa_pcm_is_hw(u->pcm_handle))
pa_sink_set_max_rewind(u->sink, u->hwbuf_size);
else {
pa_log_info("Disabling rewind for device %s", u->device_name);
pa_sink_set_max_rewind(u->sink, 0);
}
if (u->use_tsched) {
u->tsched_watermark = pa_usec_to_bytes_round_up(pa_bytes_to_usec_round_up(tsched_watermark, &requested_ss), &u->sink->sample_spec);