diff options
Diffstat (limited to 'src/pulsecore/source.c')
-rw-r--r-- | src/pulsecore/source.c | 413 |
1 files changed, 304 insertions, 109 deletions
diff --git a/src/pulsecore/source.c b/src/pulsecore/source.c index d707ad86..c767abcf 100644 --- a/src/pulsecore/source.c +++ b/src/pulsecore/source.c @@ -32,6 +32,7 @@ #include <pulse/utf8.h> #include <pulse/xmalloc.h> +#include <pulse/timeval.h> #include <pulsecore/source-output.h> #include <pulsecore/namereg.h> @@ -41,40 +42,121 @@ #include "source.h" +#define DEFAULT_MIN_LATENCY (4*PA_USEC_PER_MSEC) + static PA_DEFINE_CHECK_TYPE(pa_source, pa_msgobject); static void source_free(pa_object *o); +pa_source_new_data* pa_source_new_data_init(pa_source_new_data *data) { + pa_assert(data); + + memset(data, 0, sizeof(*data)); + data->proplist = pa_proplist_new(); + + return data; +} + +void pa_source_new_data_set_name(pa_source_new_data *data, const char *name) { + pa_assert(data); + + pa_xfree(data->name); + data->name = pa_xstrdup(name); +} + +void pa_source_new_data_set_sample_spec(pa_source_new_data *data, const pa_sample_spec *spec) { + pa_assert(data); + + if ((data->sample_spec_is_set = !!spec)) + data->sample_spec = *spec; +} + +void pa_source_new_data_set_channel_map(pa_source_new_data *data, const pa_channel_map *map) { + pa_assert(data); + + if ((data->channel_map_is_set = !!map)) + data->channel_map = *map; +} + +void pa_source_new_data_set_volume(pa_source_new_data *data, const pa_cvolume *volume) { + pa_assert(data); + + if ((data->volume_is_set = !!volume)) + data->volume = *volume; +} + +void pa_source_new_data_set_muted(pa_source_new_data *data, pa_bool_t mute) { + pa_assert(data); + + data->muted_is_set = TRUE; + data->muted = !!mute; +} + +void pa_source_new_data_done(pa_source_new_data *data) { + pa_assert(data); + + pa_xfree(data->name); + pa_proplist_free(data->proplist); +} + +static void reset_callbacks(pa_source *s) { + pa_assert(s); + + s->set_state = NULL; + s->get_volume = NULL; + s->set_volume = NULL; + s->get_mute = NULL; + s->set_mute = NULL; + s->update_requested_latency = NULL; +} + pa_source* pa_source_new( pa_core *core, - const char *driver, - const char *name, - int fail, - const pa_sample_spec *spec, - const pa_channel_map *map) { + pa_source_new_data *data, + pa_source_flags_t flags) { pa_source *s; - char st[256]; - pa_channel_map tmap; + const char *name; + char st[PA_SAMPLE_SPEC_SNPRINT_MAX], cm[PA_CHANNEL_MAP_SNPRINT_MAX]; pa_assert(core); - pa_assert(name); - pa_assert(spec); - pa_return_null_if_fail(pa_sample_spec_valid(spec)); + s = pa_msgobject_new(pa_source); + + if (!(name = pa_namereg_register(core, data->name, PA_NAMEREG_SOURCE, s, data->namereg_fail))) { + pa_xfree(s); + return NULL; + } - if (!map) - pa_return_null_if_fail(map = pa_channel_map_init_auto(&tmap, spec->channels, PA_CHANNEL_MAP_DEFAULT)); + if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_NEW], data) < 0) { + pa_xfree(s); + pa_namereg_unregister(core, name); + return NULL; + } - pa_return_null_if_fail(map && pa_channel_map_valid(map)); - pa_return_null_if_fail(map->channels == spec->channels); - pa_return_null_if_fail(!driver || pa_utf8_valid(driver)); - pa_return_null_if_fail(pa_utf8_valid(name) && *name); + pa_return_null_if_fail(!data->driver || pa_utf8_valid(data->driver)); + pa_return_null_if_fail(data->name && pa_utf8_valid(data->name) && data->name[0]); - s = pa_msgobject_new(pa_source); + pa_return_null_if_fail(data->sample_spec_is_set && pa_sample_spec_valid(&data->sample_spec)); + + if (!data->channel_map_is_set) + pa_return_null_if_fail(pa_channel_map_init_auto(&data->channel_map, data->sample_spec.channels, PA_CHANNEL_MAP_DEFAULT)); - if (!(name = pa_namereg_register(core, name, PA_NAMEREG_SOURCE, s, fail))) { + pa_return_null_if_fail(pa_channel_map_valid(&data->channel_map)); + pa_return_null_if_fail(data->channel_map.channels == data->sample_spec.channels); + + if (!data->volume_is_set) + pa_cvolume_reset(&data->volume, data->sample_spec.channels); + + pa_return_null_if_fail(pa_cvolume_valid(&data->volume)); + pa_return_null_if_fail(data->volume.channels == data->sample_spec.channels); + + if (!data->muted_is_set) + data->muted = FALSE; + + if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_FIXATE], data) < 0) { pa_xfree(s); + pa_namereg_unregister(core, name); return NULL; } @@ -83,43 +165,54 @@ pa_source* pa_source_new( s->core = core; s->state = PA_SOURCE_INIT; - s->flags = 0; + s->flags = flags; s->name = pa_xstrdup(name); - s->description = NULL; - s->driver = pa_xstrdup(driver); - s->module = NULL; + s->proplist = pa_proplist_copy(data->proplist); + s->driver = pa_xstrdup(data->driver); + s->module = data->module; - s->sample_spec = *spec; - s->channel_map = *map; + s->sample_spec = data->sample_spec; + s->channel_map = data->channel_map; s->outputs = pa_idxset_new(NULL, NULL); s->n_corked = 0; s->monitor_of = NULL; - pa_cvolume_reset(&s->volume, spec->channels); - s->muted = FALSE; + s->volume = data->volume; + s->muted = data->muted; s->refresh_volume = s->refresh_muted = FALSE; - s->get_latency = NULL; - s->set_volume = NULL; - s->get_volume = NULL; - s->set_mute = NULL; - s->get_mute = NULL; - s->set_state = NULL; + reset_callbacks(s); s->userdata = NULL; s->asyncmsgq = NULL; s->rtpoll = NULL; - pa_assert_se(pa_idxset_put(core->sources, s, &s->index) >= 0); + pa_silence_memchunk_get( + &core->silence_cache, + core->mempool, + &s->silence, + &s->sample_spec, + 0); - pa_sample_spec_snprint(st, sizeof(st), spec); - pa_log_info("Created source %u \"%s\" with sample spec \"%s\"", s->index, s->name, st); + s->min_latency = DEFAULT_MIN_LATENCY; + s->max_latency = s->min_latency; s->thread_info.outputs = pa_hashmap_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func); s->thread_info.soft_volume = s->volume; s->thread_info.soft_muted = s->muted; s->thread_info.state = s->state; + s->thread_info.max_rewind = 0; + s->thread_info.requested_latency_valid = FALSE; + s->thread_info.requested_latency = 0; + + pa_assert_se(pa_idxset_put(core->sources, s, &s->index) >= 0); + + pa_log_info("Created source %u \"%s\" with sample spec %s and channel map %s", + s->index, + s->name, + pa_sample_spec_snprint(st, sizeof(st), &s->sample_spec), + pa_channel_map_snprint(cm, sizeof(cm), &s->channel_map)); return s; } @@ -134,15 +227,16 @@ static int source_set_state(pa_source *s, pa_source_state_t state) { return 0; suspend_change = - (s->state == PA_SOURCE_SUSPENDED && PA_SOURCE_OPENED(state)) || - (PA_SOURCE_OPENED(s->state) && state == PA_SOURCE_SUSPENDED); + (s->state == PA_SOURCE_SUSPENDED && PA_SOURCE_IS_OPENED(state)) || + (PA_SOURCE_IS_OPENED(s->state) && state == PA_SOURCE_SUSPENDED); if (s->set_state) if ((ret = s->set_state(s, state)) < 0) return -1; - if (pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_STATE, PA_UINT_TO_PTR(state), 0, NULL) < 0) - return -1; + if (s->asyncmsgq) + if (pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_STATE, PA_UINT_TO_PTR(state), 0, NULL) < 0) + return -1; s->state = state; @@ -167,13 +261,18 @@ void pa_source_put(pa_source *s) { pa_source_assert_ref(s); pa_assert(s->state == PA_SINK_INIT); - pa_assert(s->rtpoll); pa_assert(s->asyncmsgq); + pa_assert(s->rtpoll); + + pa_assert(!s->min_latency || !s->max_latency || s->min_latency <= s->max_latency); + + if (!(s->flags & PA_SOURCE_HW_VOLUME_CTRL)) + s->flags |= PA_SOURCE_DECIBEL_VOLUME; pa_assert_se(source_set_state(s, PA_SOURCE_IDLE) == 0); pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_NEW, s->index); - pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_NEW_POST], s); + pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_PUT], s); } void pa_source_unlink(pa_source *s) { @@ -185,7 +284,7 @@ void pa_source_unlink(pa_source *s) { /* See pa_sink_unlink() for a couple of comments how this function * works. */ - linked = PA_SOURCE_LINKED(s->state); + linked = PA_SOURCE_IS_LINKED(s->state); if (linked) pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_UNLINK], s); @@ -205,12 +304,7 @@ void pa_source_unlink(pa_source *s) { else s->state = PA_SOURCE_UNLINKED; - s->get_latency = NULL; - s->get_volume = NULL; - s->set_volume = NULL; - s->set_mute = NULL; - s->get_mute = NULL; - s->set_state = NULL; + reset_callbacks(s); if (linked) { pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_REMOVE, s->index); @@ -225,7 +319,7 @@ static void source_free(pa_object *o) { pa_assert(s); pa_assert(pa_source_refcnt(s) == 0); - if (PA_SOURCE_LINKED(s->state)) + if (PA_SOURCE_IS_LINKED(s->state)) pa_source_unlink(s); pa_log_info("Freeing source %u \"%s\"", s->index, s->name); @@ -237,15 +331,33 @@ static void source_free(pa_object *o) { pa_hashmap_free(s->thread_info.outputs, NULL, NULL); + if (s->silence.memblock) + pa_memblock_unref(s->silence.memblock); + pa_xfree(s->name); - pa_xfree(s->description); pa_xfree(s->driver); + + if (s->proplist) + pa_proplist_free(s->proplist); + pa_xfree(s); } +void pa_source_set_asyncmsgq(pa_source *s, pa_asyncmsgq *q) { + pa_source_assert_ref(s); + + s->asyncmsgq = q; +} + +void pa_source_set_rtpoll(pa_source *s, pa_rtpoll *p) { + pa_source_assert_ref(s); + + s->rtpoll = p; +} + int pa_source_update_status(pa_source*s) { pa_source_assert_ref(s); - pa_assert(PA_SOURCE_LINKED(s->state)); + pa_assert(PA_SOURCE_IS_LINKED(s->state)); if (s->state == PA_SOURCE_SUSPENDED) return 0; @@ -255,7 +367,7 @@ int pa_source_update_status(pa_source*s) { int pa_source_suspend(pa_source *s, pa_bool_t suspend) { pa_source_assert_ref(s); - pa_assert(PA_SOURCE_LINKED(s->state)); + pa_assert(PA_SOURCE_IS_LINKED(s->state)); if (suspend) return source_set_state(s, PA_SOURCE_SUSPENDED); @@ -263,11 +375,22 @@ int pa_source_suspend(pa_source *s, pa_bool_t suspend) { return source_set_state(s, pa_source_used_by(s) ? PA_SOURCE_RUNNING : PA_SOURCE_IDLE); } -void pa_source_ping(pa_source *s) { +void pa_source_process_rewind(pa_source *s, size_t nbytes) { + pa_source_output *o; + void *state = NULL; + pa_source_assert_ref(s); - pa_assert(PA_SOURCE_LINKED(s->state)); + pa_assert(PA_SOURCE_IS_OPENED(s->thread_info.state)); + + if (nbytes <= 0) + return; + + pa_log_debug("Processing rewind..."); - pa_asyncmsgq_post(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_PING, NULL, 0, NULL, NULL); + while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL))) { + pa_source_output_assert_ref(o); + pa_source_output_process_rewind(o, nbytes); + } } void pa_source_post(pa_source*s, const pa_memchunk *chunk) { @@ -275,7 +398,7 @@ void pa_source_post(pa_source*s, const pa_memchunk *chunk) { void *state = NULL; pa_source_assert_ref(s); - pa_assert(PA_SOURCE_OPENED(s->thread_info.state)); + pa_assert(PA_SOURCE_IS_OPENED(s->thread_info.state)); pa_assert(chunk); if (s->thread_info.state != PA_SOURCE_RUNNING) @@ -292,14 +415,18 @@ void pa_source_post(pa_source*s, const pa_memchunk *chunk) { else pa_volume_memchunk(&vchunk, &s->sample_spec, &s->thread_info.soft_volume); - while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL))) + while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL))) { + pa_source_output_assert_ref(o); pa_source_output_push(o, &vchunk); + } pa_memblock_unref(vchunk.memblock); } else { - while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL))) + while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL))) { + pa_source_output_assert_ref(o); pa_source_output_push(o, chunk); + } } } @@ -307,14 +434,11 @@ pa_usec_t pa_source_get_latency(pa_source *s) { pa_usec_t usec; pa_source_assert_ref(s); - pa_assert(PA_SOURCE_LINKED(s->state)); + pa_assert(PA_SOURCE_IS_LINKED(s->state)); - if (!PA_SOURCE_OPENED(s->state)) + if (!PA_SOURCE_IS_OPENED(s->state)) return 0; - if (s->get_latency) - return s->get_latency(s); - if (pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_LATENCY, &usec, 0, NULL) < 0) return 0; @@ -325,7 +449,7 @@ void pa_source_set_volume(pa_source *s, const pa_cvolume *volume) { int changed; pa_source_assert_ref(s); - pa_assert(PA_SOURCE_LINKED(s->state)); + pa_assert(PA_SOURCE_IS_LINKED(s->state)); pa_assert(volume); changed = !pa_cvolume_equal(volume, &s->volume); @@ -345,7 +469,7 @@ const pa_cvolume *pa_source_get_volume(pa_source *s) { pa_cvolume old_volume; pa_source_assert_ref(s); - pa_assert(PA_SOURCE_LINKED(s->state)); + pa_assert(PA_SOURCE_IS_LINKED(s->state)); old_volume = s->volume; @@ -365,7 +489,7 @@ void pa_source_set_mute(pa_source *s, pa_bool_t mute) { int changed; pa_source_assert_ref(s); - pa_assert(PA_SOURCE_LINKED(s->state)); + pa_assert(PA_SOURCE_IS_LINKED(s->state)); changed = s->muted != mute; s->muted = mute; @@ -384,7 +508,7 @@ pa_bool_t pa_source_get_mute(pa_source *s) { pa_bool_t old_muted; pa_source_assert_ref(s); - pa_assert(PA_SOURCE_LINKED(s->state)); + pa_assert(PA_SOURCE_IS_LINKED(s->state)); old_muted = s->muted; @@ -400,52 +524,32 @@ pa_bool_t pa_source_get_mute(pa_source *s) { return s->muted; } -void pa_source_set_module(pa_source *s, pa_module *m) { - pa_source_assert_ref(s); - - if (m == s->module) - return; - - s->module = m; - - pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index); -} - void pa_source_set_description(pa_source *s, const char *description) { + const char *old; pa_source_assert_ref(s); - if (!description && !s->description) + if (!description && !pa_proplist_contains(s->proplist, PA_PROP_DEVICE_DESCRIPTION)) return; - if (description && s->description && !strcmp(description, s->description)) + old = pa_proplist_gets(s->proplist, PA_PROP_DEVICE_DESCRIPTION); + + if (old && description && !strcmp(old, description)) return; - pa_xfree(s->description); - s->description = pa_xstrdup(description); + if (description) + pa_proplist_sets(s->proplist, PA_PROP_DEVICE_DESCRIPTION, description); + else + pa_proplist_unset(s->proplist, PA_PROP_DEVICE_DESCRIPTION); - if (PA_SOURCE_LINKED(s->state)) { - pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_DESCRIPTION_CHANGED], s); + if (PA_SOURCE_IS_LINKED(s->state)) { pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index); + pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_PROPLIST_CHANGED], s); } } -void pa_source_set_asyncmsgq(pa_source *s, pa_asyncmsgq *q) { - pa_source_assert_ref(s); - pa_assert(q); - - s->asyncmsgq = q; -} - -void pa_source_set_rtpoll(pa_source *s, pa_rtpoll *p) { - pa_source_assert_ref(s); - pa_assert(p); - - s->rtpoll = p; -} - unsigned pa_source_linked_by(pa_source *s) { pa_source_assert_ref(s); - pa_assert(PA_SOURCE_LINKED(s->state)); + pa_assert(PA_SOURCE_IS_LINKED(s->state)); return pa_idxset_size(s->outputs); } @@ -454,7 +558,7 @@ unsigned pa_source_used_by(pa_source *s) { unsigned ret; pa_source_assert_ref(s); - pa_assert(PA_SOURCE_LINKED(s->state)); + pa_assert(PA_SOURCE_IS_LINKED(s->state)); ret = pa_idxset_size(s->outputs); pa_assert(ret >= s->n_corked); @@ -470,6 +574,7 @@ int pa_source_process_msg(pa_msgobject *object, int code, void *userdata, int64_ switch ((pa_source_message_t) code) { case PA_SOURCE_MESSAGE_ADD_OUTPUT: { pa_source_output *o = PA_SOURCE_OUTPUT(userdata); + pa_hashmap_put(s->thread_info.outputs, PA_UINT32_TO_PTR(o->index), pa_source_output_ref(o)); pa_assert(!o->thread_info.attached); @@ -478,12 +583,23 @@ int pa_source_process_msg(pa_msgobject *object, int code, void *userdata, int64_ if (o->attach) o->attach(o); + pa_source_output_set_state_within_thread(o, o->state); + + pa_source_output_update_max_rewind(o, s->thread_info.max_rewind); + + /* We don't just invalidate the requested latency here, + * because if we are in a move we might need to fix up the + * requested latency. */ + pa_source_output_set_requested_latency_within_thread(o, o->thread_info.requested_source_latency); + return 0; } case PA_SOURCE_MESSAGE_REMOVE_OUTPUT: { pa_source_output *o = PA_SOURCE_OUTPUT(userdata); + pa_source_output_set_state_within_thread(o, o->state); + if (o->detach) o->detach(o); @@ -493,6 +609,8 @@ int pa_source_process_msg(pa_msgobject *object, int code, void *userdata, int64_ if (pa_hashmap_remove(s->thread_info.outputs, PA_UINT32_TO_PTR(o->index))) pa_source_output_unref(o); + pa_source_invalidate_requested_latency(s); + return 0; } @@ -512,9 +630,6 @@ int pa_source_process_msg(pa_msgobject *object, int code, void *userdata, int64_ *((pa_bool_t*) userdata) = s->thread_info.soft_muted; return 0; - case PA_SOURCE_MESSAGE_PING: - return 0; - case PA_SOURCE_MESSAGE_SET_STATE: s->thread_info.state = PA_PTR_TO_UINT(userdata); return 0; @@ -525,13 +640,20 @@ int pa_source_process_msg(pa_msgobject *object, int code, void *userdata, int64_ * asyncmsgq and rtpoll fields can be changed without * problems */ pa_source_detach_within_thread(s); - break; + return 0; case PA_SOURCE_MESSAGE_ATTACH: /* Reattach all streams */ pa_source_attach_within_thread(s); - break; + return 0; + + case PA_SOURCE_MESSAGE_GET_REQUESTED_LATENCY: { + + pa_usec_t *usec = userdata; + *usec = pa_source_get_requested_latency_within_thread(s); + return 0; + } case PA_SOURCE_MESSAGE_GET_LATENCY: case PA_SOURCE_MESSAGE_MAX: @@ -556,14 +678,14 @@ int pa_source_suspend_all(pa_core *c, pa_bool_t suspend) { void pa_source_detach(pa_source *s) { pa_source_assert_ref(s); - pa_assert(PA_SOURCE_LINKED(s->state)); + pa_assert(PA_SOURCE_IS_LINKED(s->state)); pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_DETACH, NULL, 0, NULL); } void pa_source_attach(pa_source *s) { pa_source_assert_ref(s); - pa_assert(PA_SOURCE_LINKED(s->state)); + pa_assert(PA_SOURCE_IS_LINKED(s->state)); pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_ATTACH, NULL, 0, NULL); } @@ -573,7 +695,7 @@ void pa_source_detach_within_thread(pa_source *s) { void *state = NULL; pa_source_assert_ref(s); - pa_assert(PA_SOURCE_LINKED(s->thread_info.state)); + pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state)); while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL))) if (o->detach) @@ -585,10 +707,83 @@ void pa_source_attach_within_thread(pa_source *s) { void *state = NULL; pa_source_assert_ref(s); - pa_assert(PA_SOURCE_LINKED(s->thread_info.state)); + pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state)); while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL))) if (o->attach) o->attach(o); +} + +pa_usec_t pa_source_get_requested_latency_within_thread(pa_source *s) { + pa_usec_t result = (pa_usec_t) -1; + pa_source_output *o; + void *state = NULL; + + pa_source_assert_ref(s); + + if (s->thread_info.requested_latency_valid) + return s->thread_info.requested_latency; + + while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL))) + + if (o->thread_info.requested_source_latency != (pa_usec_t) -1 && + (result == (pa_usec_t) -1 || result > o->thread_info.requested_source_latency)) + result = o->thread_info.requested_source_latency; + + if (result != (pa_usec_t) -1) { + if (s->max_latency > 0 && result > s->max_latency) + result = s->max_latency; + + if (s->min_latency > 0 && result < s->min_latency) + result = s->min_latency; + } + + s->thread_info.requested_latency = result; + s->thread_info.requested_latency_valid = TRUE; + + return result; +} + +pa_usec_t pa_source_get_requested_latency(pa_source *s) { + pa_usec_t usec; + + pa_source_assert_ref(s); + pa_assert(PA_SOURCE_IS_LINKED(s->state)); + + if (!PA_SOURCE_IS_OPENED(s->state)) + return 0; + + if (pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_REQUESTED_LATENCY, &usec, 0, NULL) < 0) + return 0; + + if (usec == (pa_usec_t) -1) + usec = s->max_latency; + + return usec; +} + +void pa_source_set_max_rewind(pa_source *s, size_t max_rewind) { + pa_source_output *o; + void *state = NULL; + + pa_source_assert_ref(s); + + if (max_rewind == s->thread_info.max_rewind) + return; + + s->thread_info.max_rewind = max_rewind; + + while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL))) + pa_source_output_update_max_rewind(o, s->thread_info.max_rewind); +} + +void pa_source_invalidate_requested_latency(pa_source *s) { + + pa_source_assert_ref(s); + pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state)); + + s->thread_info.requested_latency_valid = FALSE; + if (s->update_requested_latency) + s->update_requested_latency(s); } |