/* Called from thread context */
void pa_source_output_process_rewind(pa_source_output *o, size_t nbytes /* in source sample spec */) {
pa_source_output_assert_ref(o);
pa_source_output_assert_io_context(o);
pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->thread_info.state));
pa_assert(pa_frame_aligned(nbytes, &o->source->sample_spec));
if (nbytes <= 0)
return;
if (o->process_rewind) {
pa_assert(pa_memblockq_get_length(o->thread_info.delay_memblockq) == 0);
if (o->thread_info.resampler)
nbytes = pa_resampler_result(o->thread_info.resampler, nbytes);
pa_log_debug("Have to rewind %lu bytes on implementor.", (unsigned long) nbytes);
if (nbytes > 0)
o->process_rewind(o, nbytes);
if (o->thread_info.resampler)
pa_resampler_reset(o->thread_info.resampler);
} else
pa_memblockq_rewind(o->thread_info.delay_memblockq, nbytes);
}
/* Called from thread context */
void pa_source_output_update_max_rewind(pa_source_output *o, size_t nbytes /* in the source's sample spec */) {
pa_source_output_assert_ref(o);
pa_source_output_assert_io_context(o);
pa_assert(PA_SOURCE_OUTPUT_IS_LINKED(o->thread_info.state));
pa_assert(pa_frame_aligned(nbytes, &o->source->sample_spec));
if (o->update_max_rewind)
o->update_max_rewind(o, o->thread_info.resampler ? pa_resampler_result(o->thread_info.resampler, nbytes) : nbytes);
}
/* Called from output thread context */
static int source_output_process_msg_cb(pa_msgobject *obj, int code, void *data, int64_t offset, pa_memchunk *chunk) {
struct userdata *u = PA_SOURCE_OUTPUT(obj)->userdata;
switch (code) {
case SOURCE_OUTPUT_MESSAGE_LATENCY_SNAPSHOT: {
size_t length;
length = pa_memblockq_get_length(u->source_output->thread_info.delay_memblockq);
u->latency_snapshot.send_counter = u->send_counter;
u->latency_snapshot.source_output_buffer = u->source_output->thread_info.resampler ? pa_resampler_result(u->source_output->thread_info.resampler, length) : length;
u->latency_snapshot.source_latency = pa_source_get_latency_within_thread(u->source_output->source);
return 0;
}
}
return pa_source_output_process_msg(obj, code, data, offset, chunk);
}