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01c26546fa
This generalises the avoid-resampling concept (don't resample for any rate above the default/alternate sample rate) to include channel count and sample format as well. The rationale for this is that users who wish to send out their data untouched by processing in PulseAudio can do so. In addition to this, there are opportunities for certain hardware (such as systems with a DSP connected to a codec) to offload processing to the DSP (providing potential cost savings). Finally, this also enables modules that might be able to perform transformations of (ANY -> sink format), and this allows us to implement such transformations.
290 lines
11 KiB
C
290 lines
11 KiB
C
#ifndef foocorehfoo
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#define foocorehfoo
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/***
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This file is part of PulseAudio.
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Copyright 2004-2006 Lennart Poettering
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PulseAudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 2.1 of the License,
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or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
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***/
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#include <pulsecore/typedefs.h>
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#include <pulse/mainloop-api.h>
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#include <pulse/sample.h>
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#include <pulsecore/cpu.h>
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/* This is a bitmask that encodes the cause why a sink/source is
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* suspended.
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*
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* When adding new causes, remember to update pa_suspend_cause_to_string() and
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* PA_SUSPEND_CAUSE_TO_STRING_BUF_SIZE! */
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typedef enum pa_suspend_cause {
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PA_SUSPEND_USER = 1, /* Exposed to the user via some protocol */
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PA_SUSPEND_APPLICATION = 2, /* Used by the device reservation logic */
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PA_SUSPEND_IDLE = 4, /* Used by module-suspend-on-idle */
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PA_SUSPEND_SESSION = 8, /* Used by module-hal for mark inactive sessions */
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PA_SUSPEND_PASSTHROUGH = 16, /* Used to suspend monitor sources when the sink is in passthrough mode */
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PA_SUSPEND_INTERNAL = 32, /* This is used for short period server-internal suspends, such as for sample rate updates */
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PA_SUSPEND_UNAVAILABLE = 64, /* Used by device implementations that have to suspend when the device is unavailable */
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PA_SUSPEND_ALL = 0xFFFF /* Magic cause that can be used to resume forcibly */
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} pa_suspend_cause_t;
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#include <pulsecore/idxset.h>
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#include <pulsecore/hashmap.h>
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#include <pulsecore/memblock.h>
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#include <pulsecore/resampler.h>
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#include <pulsecore/llist.h>
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#include <pulsecore/hook-list.h>
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#include <pulsecore/asyncmsgq.h>
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#include <pulsecore/sample-util.h>
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#include <pulsecore/sink.h>
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#include <pulsecore/source.h>
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#include <pulsecore/core-subscribe.h>
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#include <pulsecore/msgobject.h>
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typedef enum pa_server_type {
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PA_SERVER_TYPE_UNSET,
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PA_SERVER_TYPE_USER,
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PA_SERVER_TYPE_SYSTEM,
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PA_SERVER_TYPE_NONE
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} pa_server_type_t;
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typedef enum pa_core_state {
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PA_CORE_STARTUP,
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PA_CORE_RUNNING,
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PA_CORE_SHUTDOWN
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} pa_core_state_t;
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typedef enum pa_core_hook {
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PA_CORE_HOOK_SINK_NEW,
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PA_CORE_HOOK_SINK_FIXATE,
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PA_CORE_HOOK_SINK_PUT,
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PA_CORE_HOOK_SINK_UNLINK,
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PA_CORE_HOOK_SINK_UNLINK_POST,
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PA_CORE_HOOK_SINK_STATE_CHANGED,
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PA_CORE_HOOK_SINK_PROPLIST_CHANGED,
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PA_CORE_HOOK_SINK_PORT_CHANGED,
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PA_CORE_HOOK_SINK_FLAGS_CHANGED,
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PA_CORE_HOOK_SINK_VOLUME_CHANGED,
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PA_CORE_HOOK_SINK_MUTE_CHANGED,
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PA_CORE_HOOK_SINK_PORT_LATENCY_OFFSET_CHANGED,
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PA_CORE_HOOK_SOURCE_NEW,
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PA_CORE_HOOK_SOURCE_FIXATE,
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PA_CORE_HOOK_SOURCE_PUT,
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PA_CORE_HOOK_SOURCE_UNLINK,
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PA_CORE_HOOK_SOURCE_UNLINK_POST,
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PA_CORE_HOOK_SOURCE_STATE_CHANGED,
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PA_CORE_HOOK_SOURCE_PROPLIST_CHANGED,
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PA_CORE_HOOK_SOURCE_PORT_CHANGED,
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PA_CORE_HOOK_SOURCE_FLAGS_CHANGED,
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PA_CORE_HOOK_SOURCE_VOLUME_CHANGED,
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PA_CORE_HOOK_SOURCE_MUTE_CHANGED,
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PA_CORE_HOOK_SOURCE_PORT_LATENCY_OFFSET_CHANGED,
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PA_CORE_HOOK_SINK_INPUT_NEW,
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PA_CORE_HOOK_SINK_INPUT_FIXATE,
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PA_CORE_HOOK_SINK_INPUT_PUT,
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PA_CORE_HOOK_SINK_INPUT_UNLINK,
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PA_CORE_HOOK_SINK_INPUT_UNLINK_POST,
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PA_CORE_HOOK_SINK_INPUT_MOVE_START,
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PA_CORE_HOOK_SINK_INPUT_MOVE_FINISH,
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PA_CORE_HOOK_SINK_INPUT_MOVE_FAIL,
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PA_CORE_HOOK_SINK_INPUT_STATE_CHANGED,
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PA_CORE_HOOK_SINK_INPUT_PROPLIST_CHANGED,
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PA_CORE_HOOK_SINK_INPUT_VOLUME_CHANGED,
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PA_CORE_HOOK_SINK_INPUT_MUTE_CHANGED,
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PA_CORE_HOOK_SINK_INPUT_PREFERRED_SINK_CHANGED,
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PA_CORE_HOOK_SINK_INPUT_SEND_EVENT,
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PA_CORE_HOOK_SOURCE_OUTPUT_NEW,
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PA_CORE_HOOK_SOURCE_OUTPUT_FIXATE,
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PA_CORE_HOOK_SOURCE_OUTPUT_PUT,
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PA_CORE_HOOK_SOURCE_OUTPUT_UNLINK,
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PA_CORE_HOOK_SOURCE_OUTPUT_UNLINK_POST,
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PA_CORE_HOOK_SOURCE_OUTPUT_MOVE_START,
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PA_CORE_HOOK_SOURCE_OUTPUT_MOVE_FINISH,
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PA_CORE_HOOK_SOURCE_OUTPUT_MOVE_FAIL,
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PA_CORE_HOOK_SOURCE_OUTPUT_STATE_CHANGED,
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PA_CORE_HOOK_SOURCE_OUTPUT_PROPLIST_CHANGED,
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PA_CORE_HOOK_SOURCE_OUTPUT_VOLUME_CHANGED,
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PA_CORE_HOOK_SOURCE_OUTPUT_MUTE_CHANGED,
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PA_CORE_HOOK_SOURCE_OUTPUT_PREFERRED_SOURCE_CHANGED,
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PA_CORE_HOOK_SOURCE_OUTPUT_SEND_EVENT,
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PA_CORE_HOOK_CLIENT_NEW,
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PA_CORE_HOOK_CLIENT_PUT,
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PA_CORE_HOOK_CLIENT_UNLINK,
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PA_CORE_HOOK_CLIENT_PROPLIST_CHANGED,
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PA_CORE_HOOK_CLIENT_SEND_EVENT,
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PA_CORE_HOOK_CARD_NEW,
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PA_CORE_HOOK_CARD_CHOOSE_INITIAL_PROFILE,
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PA_CORE_HOOK_CARD_PUT,
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PA_CORE_HOOK_CARD_UNLINK,
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PA_CORE_HOOK_CARD_PREFERRED_PORT_CHANGED,
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PA_CORE_HOOK_CARD_PROFILE_CHANGED,
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PA_CORE_HOOK_CARD_PROFILE_ADDED,
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PA_CORE_HOOK_CARD_PROFILE_AVAILABLE_CHANGED,
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PA_CORE_HOOK_CARD_SUSPEND_CHANGED,
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PA_CORE_HOOK_PORT_AVAILABLE_CHANGED,
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PA_CORE_HOOK_PORT_LATENCY_OFFSET_CHANGED,
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PA_CORE_HOOK_DEFAULT_SINK_CHANGED,
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PA_CORE_HOOK_DEFAULT_SOURCE_CHANGED,
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PA_CORE_HOOK_MODULE_NEW,
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PA_CORE_HOOK_MODULE_PROPLIST_CHANGED,
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PA_CORE_HOOK_MODULE_UNLINK,
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PA_CORE_HOOK_SAMPLE_CACHE_NEW,
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PA_CORE_HOOK_SAMPLE_CACHE_CHANGED,
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PA_CORE_HOOK_SAMPLE_CACHE_UNLINK,
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PA_CORE_HOOK_MAX
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} pa_core_hook_t;
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/* The core structure of PulseAudio. Every PulseAudio daemon contains
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* exactly one of these. It is used for storing kind of global
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* variables for the daemon. */
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struct pa_core {
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pa_msgobject parent;
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pa_core_state_t state;
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/* A random value which may be used to identify this instance of
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* PulseAudio. Not cryptographically secure in any way. */
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uint32_t cookie;
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pa_mainloop_api *mainloop;
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/* idxset of all kinds of entities */
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pa_idxset *clients, *cards, *sinks, *sources, *sink_inputs, *source_outputs, *modules, *scache;
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/* Some hashmaps for all sorts of entities */
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pa_hashmap *namereg, *shared, *message_handlers;
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/* The default sink/source as configured by the user. If the user hasn't
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* explicitly configured anything, these are set to NULL. These are strings
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* instead of sink/source pointers, because that allows us to reference
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* devices that don't currently exist. That's useful for remembering that
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* a hotplugged USB sink was previously set as the default sink. */
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char *configured_default_sink;
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char *configured_default_source;
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/* The effective default sink/source. If no sink or source is explicitly
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* configured as the default, we pick the device that ranks highest
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* according to the compare_sinks() and compare_sources() functions in
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* core.c. pa_core_update_default_sink/source() has to be called whenever
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* anything changes that might change the comparison results. */
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pa_sink *default_sink;
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pa_source *default_source;
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pa_channel_map default_channel_map;
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pa_sample_spec default_sample_spec;
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uint32_t alternate_sample_rate;
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unsigned default_n_fragments, default_fragment_size_msec;
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unsigned deferred_volume_safety_margin_usec;
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int deferred_volume_extra_delay_usec;
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unsigned lfe_crossover_freq;
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pa_defer_event *module_defer_unload_event;
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pa_hashmap *modules_pending_unload; /* pa_module -> pa_module (hashmap-as-a-set) */
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pa_defer_event *subscription_defer_event;
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PA_LLIST_HEAD(pa_subscription, subscriptions);
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PA_LLIST_HEAD(pa_subscription_event, subscription_event_queue);
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pa_subscription_event *subscription_event_last;
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/* The mempool is used for data we write to, it's readonly for the client. */
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pa_mempool *mempool;
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/* Shared memory size, as specified either by daemon configuration
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* or PA daemon defaults (~ 64 MiB). */
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size_t shm_size;
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pa_silence_cache silence_cache;
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pa_time_event *exit_event;
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pa_time_event *scache_auto_unload_event;
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int exit_idle_time, scache_idle_time;
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bool flat_volumes:1;
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bool rescue_streams:1;
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bool disallow_module_loading:1;
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bool disallow_exit:1;
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bool running_as_daemon:1;
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bool realtime_scheduling:1;
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bool avoid_resampling:1;
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bool avoid_processing:1;
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bool disable_remixing:1;
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bool remixing_use_all_sink_channels:1;
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bool remixing_produce_lfe:1;
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bool remixing_consume_lfe:1;
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bool deferred_volume:1;
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pa_resample_method_t resample_method;
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int realtime_priority;
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pa_server_type_t server_type;
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pa_cpu_info cpu_info;
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/* hooks */
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pa_hook hooks[PA_CORE_HOOK_MAX];
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};
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PA_DECLARE_PUBLIC_CLASS(pa_core);
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#define PA_CORE(o) pa_core_cast(o)
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enum {
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PA_CORE_MESSAGE_UNLOAD_MODULE,
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PA_CORE_MESSAGE_MAX
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};
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pa_core* pa_core_new(pa_mainloop_api *m, bool shared, bool enable_memfd, size_t shm_size);
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void pa_core_set_configured_default_sink(pa_core *core, const char *sink);
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void pa_core_set_configured_default_source(pa_core *core, const char *source);
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/* These should be called whenever something changes that may affect the
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* default sink or source choice.
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*
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* If the default source choice happens between two monitor sources, the
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* monitored sinks are compared, so if the default sink changes, the default
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* source may change too. However, pa_core_update_default_sink() calls
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* pa_core_update_default_source() internally, so it's sufficient to only call
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* pa_core_update_default_sink() when something happens that affects the sink
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* ordering. */
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void pa_core_update_default_sink(pa_core *core);
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void pa_core_update_default_source(pa_core *core);
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void pa_core_set_exit_idle_time(pa_core *core, int time);
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/* Check whether no one is connected to this core */
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void pa_core_check_idle(pa_core *c);
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int pa_core_exit(pa_core *c, bool force, int retval);
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void pa_core_maybe_vacuum(pa_core *c);
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/* wrapper for c->mainloop->time_*() RT time events */
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pa_time_event* pa_core_rttime_new(pa_core *c, pa_usec_t usec, pa_time_event_cb_t cb, void *userdata);
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void pa_core_rttime_restart(pa_core *c, pa_time_event *e, pa_usec_t usec);
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static const size_t PA_SUSPEND_CAUSE_TO_STRING_BUF_SIZE =
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sizeof("USER|APPLICATION|IDLE|SESSION|PASSTHROUGH|INTERNAL|UNAVAILABLE");
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/* Converts the given suspend cause to a string. The string is written to the
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* provided buffer. The same buffer is the return value of this function. */
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const char *pa_suspend_cause_to_string(pa_suspend_cause_t cause, char buf[PA_SUSPEND_CAUSE_TO_STRING_BUF_SIZE]);
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void pa_core_move_streams_to_newly_available_preferred_sink(pa_core *c, pa_sink *s);
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void pa_core_move_streams_to_newly_available_preferred_source(pa_core *c, pa_source *s);
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#endif
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