#ifndef foopulsesinkhfoo #define foopulsesinkhfoo /*** This file is part of PulseAudio. Copyright 2004-2006 Lennart Poettering Copyright 2006 Pierre Ossman for Cendio AB PulseAudio is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. PulseAudio is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with PulseAudio; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. ***/ typedef struct pa_sink pa_sink; typedef struct pa_device_port pa_device_port; typedef struct pa_sink_volume_change pa_sink_volume_change; #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define PA_MAX_INPUTS_PER_SINK 32 /* Returns true if sink is linked: registered and accessible from client side. */ static inline pa_bool_t PA_SINK_IS_LINKED(pa_sink_state_t x) { return x == PA_SINK_RUNNING || x == PA_SINK_IDLE || x == PA_SINK_SUSPENDED; } struct pa_device_port { char *name; char *description; unsigned priority; /* .. followed by some implementation specific data */ }; #define PA_DEVICE_PORT_DATA(d) ((void*) ((uint8_t*) d + PA_ALIGN(sizeof(pa_device_port)))) struct pa_sink { pa_msgobject parent; uint32_t index; pa_core *core; pa_sink_state_t state; pa_sink_flags_t flags; pa_suspend_cause_t suspend_cause; char *name; char *driver; /* may be NULL */ pa_proplist *proplist; pa_module *module; /* may be NULL */ pa_card *card; /* may be NULL */ pa_sample_spec sample_spec; pa_channel_map channel_map; pa_idxset *inputs; unsigned n_corked; pa_source *monitor_source; pa_sink_input *input_to_master; /* non-NULL only for filter sinks */ pa_volume_t base_volume; /* shall be constant */ unsigned n_volume_steps; /* shall be constant */ /* Also see http://pulseaudio.org/wiki/InternalVolumes */ pa_cvolume reference_volume; /* The volume exported and taken as reference base for relative sink input volumes */ pa_cvolume real_volume; /* The volume that the hardware is configured to */ pa_cvolume soft_volume; /* The internal software volume we apply to all PCM data while it passes through */ pa_bool_t muted:1; pa_bool_t refresh_volume:1; pa_bool_t refresh_muted:1; pa_bool_t save_port:1; pa_bool_t save_volume:1; pa_bool_t save_muted:1; pa_asyncmsgq *asyncmsgq; pa_memchunk silence; pa_hashmap *ports; pa_device_port *active_port; unsigned priority; /* Called when the main loop requests a state change. Called from * main loop context. If returns -1 the state change will be * inhibited */ int (*set_state)(pa_sink *s, pa_sink_state_t state); /* may be NULL */ /* Sink drivers that support hardware volume may set this * callback. This is called when the current volume needs to be * re-read from the hardware. * * There are two ways for drivers to implement hardware volume * query: either set this callback or handle * PA_SINK_MESSAGE_GET_VOLUME. The callback implementation or the * message handler must update s->real_volume and s->soft_volume * (using pa_sink_set_soft_volume()) to match the current hardware * volume. * * If PA_SINK_SYNC_VOLUME is not set, then this is called from the * main thread before sending PA_SINK_MESSAGE_GET_VOLUME, so in * this case the driver can choose whether to read the volume from * the hardware in the main thread or in the IO thread. * * If PA_SINK_SYNC_VOLUME is set, then this is called from the IO * thread within the default handler for * PA_SINK_MESSAGE_GET_VOLUME (the main thread is waiting while * the message is being processed), so there's no choice of where * to do the volume reading - it has to be done in the IO thread * always. */ void (*get_volume)(pa_sink *s); /* may be NULL */ /* Sink drivers that support hardware volume must set this * callback. This is called when the hardware volume needs to be * updated. * * If PA_SINK_SYNC_VOLUME is not set, then this is called from the * main thread. The callback implementation must set the hardware * volume according to s->real_volume. If the driver can't set the * hardware volume to the exact requested value, it has to update * s->real_volume and/or s->soft_volume so that they together * match the actual hardware volume that was set. * * If PA_SINK_SYNC_VOLUME is set, then this is called from the IO * thread. The callback implementation must not actually set the * hardware volume yet, but it must check how close to the * requested volume the hardware volume can be set, and update * s->real_volume and/or s->soft_volume so that they together * match the actual hardware volume that will be set later in the * write_volume callback. */ void (*set_volume)(pa_sink *s); /* dito */ /* Sink drivers that set PA_SINK_SYNC_VOLUME must provide this * callback. This callback is not used with sinks that do not set * PA_SINK_SYNC_VOLUME. This is called from the IO thread when a * pending hardware volume change has to be written to the * hardware. The requested volume is passed to the callback * implementation in s->thread_info.current_hw_volume. * * The call is done inside pa_sink_volume_change_apply(), which is * not called automatically - it is the driver's responsibility to * schedule that function to be called at the right times in the * IO thread. */ void (*write_volume)(pa_sink *s); /* dito */ /* Called when the mute setting is queried. A PA_SINK_MESSAGE_GET_MUTE * message will also be sent. Called from IO thread if PA_SINK_SYNC_VOLUME * flag is set otherwise from main loop context. If refresh_mute is FALSE * neither this function is called nor a message is sent.*/ void (*get_mute)(pa_sink *s); /* dito */ /* Called when the mute setting shall be changed. A PA_SINK_MESSAGE_SET_MUTE * message will also be sent. Called from IO thread if PA_SINK_SYNC_VOLUME * flag is set otherwise from main loop context. */ void (*set_mute)(pa_sink *s); /* dito */ /* Called when a rewind request is issued. Called from IO thread * context. */ void (*request_rewind)(pa_sink *s); /* dito */ /* Called when a the requested latency is changed. Called from IO * thread context. */ void (*update_requested_latency)(pa_sink *s); /* dito */ /* Called whenever the port shall be changed. Called from main * thread. */ int (*set_port)(pa_sink *s, pa_device_port *port); /* dito */ /* Contains copies of the above data so that the real-time worker * thread can work without access locking */ struct { pa_sink_state_t state; pa_hashmap *inputs; pa_rtpoll *rtpoll; pa_cvolume soft_volume; pa_bool_t soft_muted:1; /* The requested latency is used for dynamic latency * sinks. For fixed latency sinks it is always identical to * the fixed_latency. See below. */ pa_bool_t requested_latency_valid:1; pa_usec_t requested_latency; /* The number of bytes streams need to keep around as history to * be able to satisfy every DMA buffer rewrite */ size_t max_rewind; /* The number of bytes streams need to keep around to satisfy * every DMA write request */ size_t max_request; /* Maximum of what clients requested to rewind in this cycle */ size_t rewind_nbytes; pa_bool_t rewind_requested; /* Both dynamic and fixed latencies will be clamped to this * range. */ pa_usec_t min_latency; /* we won't go below this latency */ pa_usec_t max_latency; /* An upper limit for the latencies */ /* 'Fixed' simply means that the latency is exclusively * decided on by the sink, and the clients have no influence * in changing it */ pa_usec_t fixed_latency; /* for sinks with PA_SINK_DYNAMIC_LATENCY this is 0 */ /* Delayed volume change events are queued here. The events * are stored in expiration order. The one expiring next is in * the head of the list. */ PA_LLIST_HEAD(pa_sink_volume_change, volume_changes); pa_sink_volume_change *volume_changes_tail; /* This value is updated in pa_sink_volume_change_apply() and * used only by sinks with PA_SINK_SYNC_VOLUME. */ pa_cvolume current_hw_volume; /* The amount of usec volume up events are delayed and volume * down events are made earlier. */ uint32_t volume_change_safety_margin; /* Usec delay added to all volume change events, may be negative. */ int32_t volume_change_extra_delay; } thread_info; void *userdata; }; PA_DECLARE_PUBLIC_CLASS(pa_sink); #define PA_SINK(s) (pa_sink_cast(s)) typedef enum pa_sink_message { PA_SINK_MESSAGE_ADD_INPUT, PA_SINK_MESSAGE_REMOVE_INPUT, PA_SINK_MESSAGE_GET_VOLUME, PA_SINK_MESSAGE_SET_SHARED_VOLUME, PA_SINK_MESSAGE_SET_VOLUME_SYNCED, PA_SINK_MESSAGE_SET_VOLUME, PA_SINK_MESSAGE_SYNC_VOLUMES, PA_SINK_MESSAGE_GET_MUTE, PA_SINK_MESSAGE_SET_MUTE, PA_SINK_MESSAGE_GET_LATENCY, PA_SINK_MESSAGE_GET_REQUESTED_LATENCY, PA_SINK_MESSAGE_SET_STATE, PA_SINK_MESSAGE_START_MOVE, PA_SINK_MESSAGE_FINISH_MOVE, PA_SINK_MESSAGE_ATTACH, PA_SINK_MESSAGE_DETACH, PA_SINK_MESSAGE_SET_LATENCY_RANGE, PA_SINK_MESSAGE_GET_LATENCY_RANGE, PA_SINK_MESSAGE_SET_FIXED_LATENCY, PA_SINK_MESSAGE_GET_FIXED_LATENCY, PA_SINK_MESSAGE_GET_MAX_REWIND, PA_SINK_MESSAGE_GET_MAX_REQUEST, PA_SINK_MESSAGE_SET_MAX_REWIND, PA_SINK_MESSAGE_SET_MAX_REQUEST, PA_SINK_MESSAGE_SET_PORT, PA_SINK_MESSAGE_UPDATE_VOLUME_AND_MUTE, PA_SINK_MESSAGE_MAX } pa_sink_message_t; typedef struct pa_sink_new_data { char *name; pa_proplist *proplist; const char *driver; pa_module *module; pa_card *card; pa_hashmap *ports; char *active_port; pa_sample_spec sample_spec; pa_channel_map channel_map; pa_cvolume volume; pa_bool_t muted :1; pa_bool_t sample_spec_is_set:1; pa_bool_t channel_map_is_set:1; pa_bool_t volume_is_set:1; pa_bool_t muted_is_set:1; pa_bool_t namereg_fail:1; pa_bool_t save_port:1; pa_bool_t save_volume:1; pa_bool_t save_muted:1; } pa_sink_new_data; pa_sink_new_data* pa_sink_new_data_init(pa_sink_new_data *data); void pa_sink_new_data_set_name(pa_sink_new_data *data, const char *name); void pa_sink_new_data_set_sample_spec(pa_sink_new_data *data, const pa_sample_spec *spec); void pa_sink_new_data_set_channel_map(pa_sink_new_data *data, const pa_channel_map *map); void pa_sink_new_data_set_volume(pa_sink_new_data *data, const pa_cvolume *volume); void pa_sink_new_data_set_muted(pa_sink_new_data *data, pa_bool_t mute); void pa_sink_new_data_set_port(pa_sink_new_data *data, const char *port); void pa_sink_new_data_done(pa_sink_new_data *data); /*** To be called exclusively by the sink driver, from main context */ pa_sink* pa_sink_new( pa_core *core, pa_sink_new_data *data, pa_sink_flags_t flags); void pa_sink_put(pa_sink *s); void pa_sink_unlink(pa_sink* s); void pa_sink_set_description(pa_sink *s, const char *description); void pa_sink_set_asyncmsgq(pa_sink *s, pa_asyncmsgq *q); void pa_sink_set_rtpoll(pa_sink *s, pa_rtpoll *p); void pa_sink_set_max_rewind(pa_sink *s, size_t max_rewind); void pa_sink_set_max_request(pa_sink *s, size_t max_request); void pa_sink_set_latency_range(pa_sink *s, pa_usec_t min_latency, pa_usec_t max_latency); void pa_sink_set_fixed_latency(pa_sink *s, pa_usec_t latency); void pa_sink_detach(pa_sink *s); void pa_sink_attach(pa_sink *s); void pa_sink_set_soft_volume(pa_sink *s, const pa_cvolume *volume); void pa_sink_volume_changed(pa_sink *s, const pa_cvolume *new_volume); void pa_sink_mute_changed(pa_sink *s, pa_bool_t new_muted); void pa_sink_update_flags(pa_sink *s, pa_sink_flags_t mask, pa_sink_flags_t value); pa_bool_t pa_device_init_description(pa_proplist *p); pa_bool_t pa_device_init_icon(pa_proplist *p, pa_bool_t is_sink); pa_bool_t pa_device_init_intended_roles(pa_proplist *p); unsigned pa_device_init_priority(pa_proplist *p); /**** May be called by everyone, from main context */ /* The returned value is supposed to be in the time domain of the sound card! */ pa_usec_t pa_sink_get_latency(pa_sink *s); pa_usec_t pa_sink_get_requested_latency(pa_sink *s); void pa_sink_get_latency_range(pa_sink *s, pa_usec_t *min_latency, pa_usec_t *max_latency); pa_usec_t pa_sink_get_fixed_latency(pa_sink *s); size_t pa_sink_get_max_rewind(pa_sink *s); size_t pa_sink_get_max_request(pa_sink *s); int pa_sink_update_status(pa_sink*s); int pa_sink_suspend(pa_sink *s, pa_bool_t suspend, pa_suspend_cause_t cause); int pa_sink_suspend_all(pa_core *c, pa_bool_t suspend, pa_suspend_cause_t cause); /* Use this instead of checking s->flags & PA_SINK_FLAT_VOLUME directly. */ pa_bool_t pa_sink_flat_volume_enabled(pa_sink *s); void pa_sink_set_volume(pa_sink *sink, const pa_cvolume *volume, pa_bool_t sendmsg, pa_bool_t save); const pa_cvolume *pa_sink_get_volume(pa_sink *sink, pa_bool_t force_refresh); void pa_sink_set_mute(pa_sink *sink, pa_bool_t mute, pa_bool_t save); pa_bool_t pa_sink_get_mute(pa_sink *sink, pa_bool_t force_refresh); pa_bool_t pa_sink_update_proplist(pa_sink *s, pa_update_mode_t mode, pa_proplist *p); int pa_sink_set_port(pa_sink *s, const char *name, pa_bool_t save); unsigned pa_sink_linked_by(pa_sink *s); /* Number of connected streams */ unsigned pa_sink_used_by(pa_sink *s); /* Number of connected streams which are not corked */ unsigned pa_sink_check_suspend(pa_sink *s); /* Returns how many streams are active that don't allow suspensions */ #define pa_sink_get_state(s) ((s)->state) /* Moves all inputs away, and stores them in pa_queue */ pa_queue *pa_sink_move_all_start(pa_sink *s, pa_queue *q); void pa_sink_move_all_finish(pa_sink *s, pa_queue *q, pa_bool_t save); void pa_sink_move_all_fail(pa_queue *q); /*** To be called exclusively by the sink driver, from IO context */ void pa_sink_render(pa_sink*s, size_t length, pa_memchunk *result); void pa_sink_render_full(pa_sink *s, size_t length, pa_memchunk *result); void pa_sink_render_into(pa_sink*s, pa_memchunk *target); void pa_sink_render_into_full(pa_sink *s, pa_memchunk *target); void pa_sink_process_rewind(pa_sink *s, size_t nbytes); int pa_sink_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offset, pa_memchunk *chunk); void pa_sink_attach_within_thread(pa_sink *s); void pa_sink_detach_within_thread(pa_sink *s); pa_usec_t pa_sink_get_requested_latency_within_thread(pa_sink *s); void pa_sink_set_max_rewind_within_thread(pa_sink *s, size_t max_rewind); void pa_sink_set_max_request_within_thread(pa_sink *s, size_t max_request); void pa_sink_set_latency_range_within_thread(pa_sink *s, pa_usec_t min_latency, pa_usec_t max_latency); void pa_sink_set_fixed_latency_within_thread(pa_sink *s, pa_usec_t latency); void pa_sink_update_volume_and_mute(pa_sink *s); pa_bool_t pa_sink_volume_change_apply(pa_sink *s, pa_usec_t *usec_to_next); /*** To be called exclusively by sink input drivers, from IO context */ void pa_sink_request_rewind(pa_sink*s, size_t nbytes); void pa_sink_invalidate_requested_latency(pa_sink *s, pa_bool_t dynamic); pa_usec_t pa_sink_get_latency_within_thread(pa_sink *s); pa_device_port *pa_device_port_new(const char *name, const char *description, size_t extra); void pa_device_port_free(pa_device_port *p); /* Verify that we called in IO context (aka 'thread context), or that * the sink is not yet set up, i.e. the thread not set up yet. See * pa_assert_io_context() in thread-mq.h for more information. */ #define pa_sink_assert_io_context(s) \ pa_assert(pa_thread_mq_get() || !PA_SINK_IS_LINKED((s)->state)) #endif