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node: schedule upstream first

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In pull mode, schedule all upstream nodes first, if any of them
produce output, push it into the current node.
Underrun streams without input on audiomixer, avoids glitch when
starting a new stream.
This commit is contained in:
Wim Taymans 2017-04-12 11:24:11 +02:00
parent 4c7b56020a
commit d9bb116d27
3 changed files with 18 additions and 17 deletions
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8
spa/plugins/audiomixer/audiomixer.c
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@ -733,7 +733,7 @@ spa_audiomixer_node_process_input (SpaNode *node)
spa_log_trace (this->log, "audiomixer %p: queue buffer %d on port %d %zd %zd",
this, b->outbuf->id, i, port->queued_bytes, min_queued);
}
if (min_queued == SIZE_MAX || port->queued_bytes < min_queued)
if (port->queued_bytes > 0 && port->queued_bytes < min_queued)
min_queued = port->queued_bytes;
}
@ -772,7 +772,7 @@ spa_audiomixer_node_process_output (SpaNode *node)
res = SPA_RESULT_NEED_INPUT;
/* produce more output if possible */
if (this->state == STATE_OUT) {
size_t min_queued = -1;
size_t min_queued = SIZE_MAX;
for (i = 0; i < MAX_PORTS; i++) {
SpaAudioMixerPort *port = &this->in_ports[i];
@ -780,10 +780,10 @@ spa_audiomixer_node_process_output (SpaNode *node)
if (port->io == NULL || port->n_buffers == 0)
continue;
if (min_queued == -1 || port->queued_bytes < min_queued)
if (port->queued_bytes > 0 && port->queued_bytes < min_queued)
min_queued = port->queued_bytes;
}
if (min_queued != -1 && min_queued > 0) {
if (min_queued != SIZE_MAX && min_queued > 0) {
res = mix_output (this, min_queued);
} else {
this->state = STATE_IN;