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modules: make sure we deactivate the graph safely

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Use a blocking invoke to ensure the loop is not using the graph anymore
when we deactivate or reset it.

See #4750, #4700
This commit is contained in:
Wim Taymans 2025-06-11 15:21:26 +02:00
parent 512db73823
commit 12cfaa7d50
1 changed files with 63 additions and 12 deletions
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73
src/modules/module-filter-chain.c
View file

@ -844,6 +844,7 @@ struct impl {
struct spa_hook graph_listener;
uint32_t n_inputs;
uint32_t n_outputs;
bool graph_active;
};
static void capture_destroy(void *d)
@ -931,6 +932,7 @@ static void playback_process(void *d)
pw_log_trace_fp("%p: stride:%d size:%d requested:%"PRIu64" (%"PRIu64")", impl,
stride, data_size, out->requested, out->requested * stride);
if (impl->graph_active)
spa_filter_graph_process(impl->graph, cin, cout, data_size / sizeof(float));
done:
@ -940,6 +942,61 @@ done:
pw_stream_queue_buffer(impl->playback, out);
}
static int do_deactivate(struct spa_loop *loop, bool async, uint32_t seq,
const void *data, size_t size, void *user_data)
{
struct impl *impl = user_data;
impl->graph_active = false;
return 0;
}
static int activate_graph(struct impl *impl)
{
char rate[64];
int res;
if (impl->graph_active)
return 0;
snprintf(rate, sizeof(rate), "%lu", impl->rate);
res = spa_filter_graph_activate(impl->graph, &SPA_DICT_ITEMS(
SPA_DICT_ITEM(SPA_KEY_AUDIO_RATE, rate)));
if (res >= 0)
impl->graph_active = true;
return res;
}
static int deactivate_graph(struct impl *impl)
{
struct pw_loop *data_loop;
if (!impl->graph_active)
return 0;
data_loop = pw_stream_get_data_loop(impl->playback);
pw_loop_invoke(data_loop, do_deactivate, 0, NULL, 0, true, impl);
return spa_filter_graph_deactivate(impl->graph);
}
static int reset_graph(struct impl *impl)
{
struct pw_loop *data_loop;
int res;
bool old_active = impl->graph_active;
data_loop = pw_stream_get_data_loop(impl->playback);
pw_loop_invoke(data_loop, do_deactivate, 0, NULL, 0, true, impl);
res = spa_filter_graph_reset(impl->graph);
impl->graph_active = old_active;
return res;
}
static void param_latency_changed(struct impl *impl, const struct spa_pod *param)
{
struct spa_latency_info latency;
@ -1013,7 +1070,6 @@ static void param_changed(void *data, uint32_t id, const struct spa_pod *param,
bool capture)
{
struct impl *impl = data;
struct spa_filter_graph *graph = impl->graph;
int res;
switch (id) {
@ -1024,7 +1080,7 @@ static void param_changed(void *data, uint32_t id, const struct spa_pod *param,
if (param == NULL) {
pw_log_info("module %p: filter deactivate", impl);
if (!capture)
spa_filter_graph_deactivate(graph);
deactivate_graph(impl);
impl->rate = 0;
} else {
if ((res = spa_format_audio_raw_parse(param, &info)) < 0)
@ -1071,13 +1127,12 @@ static void playback_state_changed(void *data, enum pw_stream_state old,
enum pw_stream_state state, const char *error)
{
struct impl *impl = data;
struct spa_filter_graph *graph = impl->graph;
int res;
switch (state) {
case PW_STREAM_STATE_PAUSED:
pw_stream_flush(impl->playback, false);
spa_filter_graph_reset(graph);
reset_graph(impl);
break;
case PW_STREAM_STATE_UNCONNECTED:
pw_log_info("module %p: unconnected", impl);
@ -1097,15 +1152,11 @@ static void playback_state_changed(void *data, enum pw_stream_state old,
goto error;
}
if (impl->rate != target) {
char rate[64];
impl->rate = target;
snprintf(rate, sizeof(rate), "%lu", impl->rate);
spa_filter_graph_deactivate(graph);
if ((res = spa_filter_graph_activate(graph,
&SPA_DICT_ITEMS(
SPA_DICT_ITEM(SPA_KEY_AUDIO_RATE, rate)))) < 0)
goto error;
deactivate_graph(impl);
}
if ((res = activate_graph(impl)) < 0)
goto error;
break;
}
default: