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Implement "early requests" mode.

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PA_STREAM_EARLY_REQUESTS is a new flag that will modify buffering metric
selection behaviour a bit. This code is good for broken ALSA/OSS clients that
ignore 'readability' on the fds in question and schedule audio via usleep()
instead.
This commit is contained in:
Lennart Poettering 2008-09-03 18:31:46 +02:00
parent 99d5ec6c93
commit 40b66a0be9
4 changed files with 274 additions and 181 deletions
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18
src/pulse/stream.c
View file

@ -886,7 +886,8 @@ static int create_stream(
PA_STREAM_VARIABLE_RATE|
PA_STREAM_PEAK_DETECT|
PA_STREAM_START_MUTED|
PA_STREAM_ADJUST_LATENCY)), PA_ERR_INVALID);
PA_STREAM_ADJUST_LATENCY|
PA_STREAM_EARLY_REQUESTS)), PA_ERR_INVALID);
PA_CHECK_VALIDITY(s->context, s->context->version >= 12 || !(flags & PA_STREAM_VARIABLE_RATE), PA_ERR_NOTSUPPORTED);
PA_CHECK_VALIDITY(s->context, s->context->version >= 13 || !(flags & PA_STREAM_PEAK_DETECT), PA_ERR_NOTSUPPORTED);
@ -899,6 +900,7 @@ static int create_stream(
PA_CHECK_VALIDITY(s->context, direction == PA_STREAM_RECORD || !(flags & (PA_STREAM_PEAK_DETECT)), PA_ERR_INVALID);
PA_CHECK_VALIDITY(s->context, !volume || volume->channels == s->sample_spec.channels, PA_ERR_INVALID);
PA_CHECK_VALIDITY(s->context, !sync_stream || (direction == PA_STREAM_PLAYBACK && sync_stream->direction == PA_STREAM_PLAYBACK), PA_ERR_INVALID);
PA_CHECK_VALIDITY(s->context, (flags & (PA_STREAM_ADJUST_LATENCY|PA_STREAM_EARLY_REQUESTS)) != (PA_STREAM_ADJUST_LATENCY|PA_STREAM_EARLY_REQUESTS), PA_ERR_INVALID);
pa_stream_ref(s);
@ -997,13 +999,12 @@ static int create_stream(
pa_tagstruct_putu32(t, s->direct_on_input);
}
if (s->context->version >= 14 &&
s->direction == PA_STREAM_PLAYBACK) {
if (s->context->version >= 14) {
pa_tagstruct_put(
t,
PA_TAG_BOOLEAN, volume_set,
PA_TAG_INVALID);
if (s->direction == PA_STREAM_PLAYBACK)
pa_tagstruct_put_boolean(t, volume_set);
pa_tagstruct_put_boolean(t, flags & PA_STREAM_EARLY_REQUESTS);
}
pa_pstream_send_tagstruct(s->context->pstream, t);
@ -2079,6 +2080,9 @@ pa_operation* pa_stream_set_buffer_attr(pa_stream *s, const pa_buffer_attr *attr
if (s->context->version >= 13)
pa_tagstruct_put_boolean(t, !!(s->flags & PA_STREAM_ADJUST_LATENCY));
if (s->context->version >= 14)
pa_tagstruct_put_boolean(t, !!(s->flags & PA_STREAM_EARLY_REQUESTS));
pa_pstream_send_tagstruct(s->context->pstream, t);
pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, stream_set_buffer_attr_callback, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref);