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b4a36453da
pa_sink_input_get_state() and pa_source_output_get_state() just return the state variable. We can as well access the state variable directly. There are no behaviour changes, except that some filter sources accessed the main thread's state variable from their push() callbacks. I fixed them so that they use the thread_info.state variable instead.
402 lines
17 KiB
C
402 lines
17 KiB
C
#ifndef foopulsesourceoutputhfoo
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#define foopulsesourceoutputhfoo
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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 <inttypes.h>
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#include <pulsecore/typedefs.h>
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#include <pulse/sample.h>
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#include <pulse/format.h>
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#include <pulsecore/memblockq.h>
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#include <pulsecore/resampler.h>
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#include <pulsecore/module.h>
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#include <pulsecore/client.h>
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#include <pulsecore/source.h>
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#include <pulsecore/core.h>
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#include <pulsecore/sink-input.h>
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typedef enum pa_source_output_state {
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PA_SOURCE_OUTPUT_INIT,
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PA_SOURCE_OUTPUT_RUNNING,
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PA_SOURCE_OUTPUT_CORKED,
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PA_SOURCE_OUTPUT_UNLINKED
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} pa_source_output_state_t;
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static inline bool PA_SOURCE_OUTPUT_IS_LINKED(pa_source_output_state_t x) {
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return x == PA_SOURCE_OUTPUT_RUNNING || x == PA_SOURCE_OUTPUT_CORKED;
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}
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typedef enum pa_source_output_flags {
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PA_SOURCE_OUTPUT_VARIABLE_RATE = 1,
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PA_SOURCE_OUTPUT_DONT_MOVE = 2,
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PA_SOURCE_OUTPUT_START_CORKED = 4,
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PA_SOURCE_OUTPUT_NO_REMAP = 8,
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PA_SOURCE_OUTPUT_NO_REMIX = 16,
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PA_SOURCE_OUTPUT_FIX_FORMAT = 32,
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PA_SOURCE_OUTPUT_FIX_RATE = 64,
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PA_SOURCE_OUTPUT_FIX_CHANNELS = 128,
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PA_SOURCE_OUTPUT_DONT_INHIBIT_AUTO_SUSPEND = 256,
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PA_SOURCE_OUTPUT_NO_CREATE_ON_SUSPEND = 512,
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PA_SOURCE_OUTPUT_KILL_ON_SUSPEND = 1024,
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PA_SOURCE_OUTPUT_PASSTHROUGH = 2048
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} pa_source_output_flags_t;
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struct pa_source_output {
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pa_msgobject parent;
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uint32_t index;
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pa_core *core;
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pa_source_output_state_t state;
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pa_source_output_flags_t flags;
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char *driver; /* may be NULL */
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pa_proplist *proplist;
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pa_module *module; /* may be NULL */
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pa_client *client; /* may be NULL */
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pa_source *source; /* NULL while being moved */
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/* This is set to true when creating the source output if the source was
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* requested by the application that created the source output. This is
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* sometimes useful for determining whether the source output should be
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* moved by some automatic policy. If the source output is moved away from
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* the source that the application requested, this flag is reset to
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* false. */
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bool source_requested_by_application;
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pa_source *destination_source; /* only set by filter sources */
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/* A source output can monitor just a single input of a sink, in which case we find it here */
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pa_sink_input *direct_on_input; /* may be NULL */
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pa_sample_spec sample_spec;
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pa_channel_map channel_map;
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pa_format_info *format;
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/* Also see http://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/Developer/Volumes/ */
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pa_cvolume volume; /* The volume clients are informed about */
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pa_cvolume reference_ratio; /* The ratio of the stream's volume to the source's reference volume */
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pa_cvolume real_ratio; /* The ratio of the stream's volume to the source's real volume */
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pa_cvolume volume_factor; /* An internally used volume factor that can be used by modules to apply effects and suchlike without having that visible to the outside */
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pa_cvolume soft_volume; /* The internal software volume we apply to all PCM data while it passes through. Usually calculated as real_ratio * volume_factor */
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pa_cvolume volume_factor_source; /* A second volume factor in format of the source this stream is connected to */
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bool volume_writable:1;
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bool muted:1;
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/* if true then the source we are connected to and/or the volume
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* set is worth remembering, i.e. was explicitly chosen by the
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* user and not automatically. module-stream-restore looks for
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* this.*/
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bool save_source:1, save_volume:1, save_muted:1;
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pa_resample_method_t requested_resample_method, actual_resample_method;
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/* Pushes a new memchunk into the output. Called from IO thread
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* context. */
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void (*push)(pa_source_output *o, const pa_memchunk *chunk); /* may NOT be NULL */
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/* Only relevant for monitor sources right now: called when the
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* recorded stream is rewound. Called from IO context */
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void (*process_rewind)(pa_source_output *o, size_t nbytes); /* may be NULL */
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/* Called whenever the maximum rewindable size of the source
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* changes. Called from IO thread context. */
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void (*update_max_rewind) (pa_source_output *o, size_t nbytes); /* may be NULL */
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/* Called whenever the configured latency of the source
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* changes. Called from IO context. */
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void (*update_source_requested_latency) (pa_source_output *o); /* may be NULL */
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/* Called whenever the latency range of the source changes. Called
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* from IO context. */
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void (*update_source_latency_range) (pa_source_output *o); /* may be NULL */
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/* Called whenever the fixed latency of the source changes, if there
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* is one. Called from IO context. */
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void (*update_source_fixed_latency) (pa_source_output *i); /* may be NULL */
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/* If non-NULL this function is called when the output is first
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* connected to a source or when the rtpoll/asyncmsgq fields
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* change. You usually don't need to implement this function
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* unless you rewrite a source that is piggy-backed onto
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* another. Called from IO thread context */
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void (*attach) (pa_source_output *o); /* may be NULL */
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/* If non-NULL this function is called when the output is
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* disconnected from its source. Called from IO thread context */
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void (*detach) (pa_source_output *o); /* may be NULL */
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/* If non-NULL called whenever the source this output is attached
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* to suspends or resumes. Called from main context */
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void (*suspend) (pa_source_output *o, bool b); /* may be NULL */
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/* If non-NULL called whenever the source this output is attached
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* to suspends or resumes. Called from IO context */
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void (*suspend_within_thread) (pa_source_output *o, bool b); /* may be NULL */
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/* If non-NULL called whenever the source output is moved to a new
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* source. Called from main context after the source output has been
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* detached from the old source and before it has been attached to
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* the new source. If dest is NULL the move was executed in two
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* phases and the second one failed; the stream will be destroyed
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* after this call. */
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void (*moving) (pa_source_output *o, pa_source *dest); /* may be NULL */
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/* Supposed to unlink and destroy this stream. Called from main
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* context. */
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void (*kill)(pa_source_output* o); /* may NOT be NULL */
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/* Return the current latency (i.e. length of buffered audio) of
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this stream. Called from main context. This is added to what the
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PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY message sent to the IO thread
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returns */
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pa_usec_t (*get_latency) (pa_source_output *o); /* may be NULL */
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/* If non-NULL this function is called from thread context if the
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* state changes. The old state is found in thread_info.state. */
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void (*state_change) (pa_source_output *o, pa_source_output_state_t state); /* may be NULL */
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/* If non-NULL this function is called before this source output
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* is moved to a source and if it returns false the move
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* will not be allowed */
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bool (*may_move_to) (pa_source_output *o, pa_source *s); /* may be NULL */
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/* If non-NULL this function is used to dispatch asynchronous
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* control events. */
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void (*send_event)(pa_source_output *o, const char *event, pa_proplist* data);
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/* If non-NULL this function is called whenever the source output
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* volume changes. Called from main context */
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void (*volume_changed)(pa_source_output *o); /* may be NULL */
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/* If non-NULL this function is called whenever the source output
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* mute status changes. Called from main context */
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void (*mute_changed)(pa_source_output *o); /* may be NULL */
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struct {
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pa_source_output_state_t state;
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pa_cvolume soft_volume;
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bool muted:1;
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bool attached:1; /* True only between ->attach() and ->detach() calls */
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pa_sample_spec sample_spec;
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pa_resampler* resampler; /* may be NULL */
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/* We maintain a delay memblockq here for source outputs that
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* don't implement rewind() */
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pa_memblockq *delay_memblockq;
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/* The requested latency for the source */
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pa_usec_t requested_source_latency;
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pa_sink_input *direct_on_input; /* may be NULL */
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} thread_info;
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void *userdata;
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};
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PA_DECLARE_PUBLIC_CLASS(pa_source_output);
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#define PA_SOURCE_OUTPUT(o) pa_source_output_cast(o)
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enum {
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PA_SOURCE_OUTPUT_MESSAGE_GET_LATENCY,
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PA_SOURCE_OUTPUT_MESSAGE_SET_RATE,
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PA_SOURCE_OUTPUT_MESSAGE_SET_STATE,
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PA_SOURCE_OUTPUT_MESSAGE_SET_REQUESTED_LATENCY,
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PA_SOURCE_OUTPUT_MESSAGE_GET_REQUESTED_LATENCY,
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PA_SOURCE_OUTPUT_MESSAGE_SET_SOFT_VOLUME,
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PA_SOURCE_OUTPUT_MESSAGE_SET_SOFT_MUTE,
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PA_SOURCE_OUTPUT_MESSAGE_MAX
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};
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typedef struct pa_source_output_send_event_hook_data {
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pa_source_output *source_output;
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const char *event;
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pa_proplist *data;
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} pa_source_output_send_event_hook_data;
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typedef struct pa_source_output_new_data {
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pa_source_output_flags_t flags;
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pa_proplist *proplist;
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pa_sink_input *direct_on_input;
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const char *driver;
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pa_module *module;
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pa_client *client;
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pa_source *source;
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bool source_requested_by_application;
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pa_source *destination_source;
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pa_resample_method_t resample_method;
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pa_sample_spec sample_spec;
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pa_channel_map channel_map;
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pa_format_info *format;
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pa_idxset *req_formats;
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pa_idxset *nego_formats;
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pa_cvolume volume, volume_factor, volume_factor_source;
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bool muted:1;
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bool sample_spec_is_set:1;
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bool channel_map_is_set:1;
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bool volume_is_set:1, volume_factor_is_set:1, volume_factor_source_is_set:1;
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bool muted_is_set:1;
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bool volume_is_absolute:1;
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bool volume_writable:1;
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bool save_source:1, save_volume:1, save_muted:1;
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} pa_source_output_new_data;
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pa_source_output_new_data* pa_source_output_new_data_init(pa_source_output_new_data *data);
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void pa_source_output_new_data_set_sample_spec(pa_source_output_new_data *data, const pa_sample_spec *spec);
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void pa_source_output_new_data_set_channel_map(pa_source_output_new_data *data, const pa_channel_map *map);
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bool pa_source_output_new_data_is_passthrough(pa_source_output_new_data *data);
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void pa_source_output_new_data_set_volume(pa_source_output_new_data *data, const pa_cvolume *volume);
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void pa_source_output_new_data_apply_volume_factor(pa_source_output_new_data *data, const pa_cvolume *volume_factor);
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void pa_source_output_new_data_apply_volume_factor_source(pa_source_output_new_data *data, const pa_cvolume *volume_factor);
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void pa_source_output_new_data_set_muted(pa_source_output_new_data *data, bool mute);
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bool pa_source_output_new_data_set_source(pa_source_output_new_data *data, pa_source *s, bool save,
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bool requested_by_application);
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bool pa_source_output_new_data_set_formats(pa_source_output_new_data *data, pa_idxset *formats);
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void pa_source_output_new_data_done(pa_source_output_new_data *data);
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/* To be called by the implementing module only */
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int pa_source_output_new(
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pa_source_output**o,
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pa_core *core,
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pa_source_output_new_data *data);
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void pa_source_output_put(pa_source_output *o);
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void pa_source_output_unlink(pa_source_output*o);
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pa_usec_t pa_source_output_set_requested_latency(pa_source_output *o, pa_usec_t usec);
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void pa_source_output_cork(pa_source_output *o, bool b);
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int pa_source_output_set_rate(pa_source_output *o, uint32_t rate);
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int pa_source_output_update_rate(pa_source_output *o);
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size_t pa_source_output_get_max_rewind(pa_source_output *o);
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/* Callable by everyone */
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/* External code may request disconnection with this function */
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void pa_source_output_kill(pa_source_output*o);
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pa_usec_t pa_source_output_get_latency(pa_source_output *o, pa_usec_t *source_latency);
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bool pa_source_output_is_volume_readable(pa_source_output *o);
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bool pa_source_output_is_passthrough(pa_source_output *o);
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void pa_source_output_set_volume(pa_source_output *o, const pa_cvolume *volume, bool save, bool absolute);
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pa_cvolume *pa_source_output_get_volume(pa_source_output *o, pa_cvolume *volume, bool absolute);
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void pa_source_output_set_mute(pa_source_output *o, bool mute, bool save);
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void pa_source_output_set_property(pa_source_output *o, const char *key, const char *value);
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void pa_source_output_set_property_arbitrary(pa_source_output *o, const char *key, const uint8_t *value, size_t nbytes);
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void pa_source_output_update_proplist(pa_source_output *o, pa_update_mode_t mode, pa_proplist *p);
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pa_resample_method_t pa_source_output_get_resample_method(pa_source_output *o);
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void pa_source_output_send_event(pa_source_output *o, const char *name, pa_proplist *data);
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bool pa_source_output_may_move(pa_source_output *o);
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bool pa_source_output_may_move_to(pa_source_output *o, pa_source *dest);
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int pa_source_output_move_to(pa_source_output *o, pa_source *dest, bool save);
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/* The same as pa_source_output_move_to() but in two separate steps,
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* first the detaching from the old source, then the attaching to the
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* new source */
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int pa_source_output_start_move(pa_source_output *o);
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int pa_source_output_finish_move(pa_source_output *o, pa_source *dest, bool save);
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void pa_source_output_fail_move(pa_source_output *o);
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pa_usec_t pa_source_output_get_requested_latency(pa_source_output *o);
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/* To be used exclusively by the source driver thread */
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void pa_source_output_push(pa_source_output *o, const pa_memchunk *chunk);
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void pa_source_output_process_rewind(pa_source_output *o, size_t nbytes);
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void pa_source_output_update_max_rewind(pa_source_output *o, size_t nbytes);
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void pa_source_output_set_state_within_thread(pa_source_output *o, pa_source_output_state_t state);
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int pa_source_output_process_msg(pa_msgobject *mo, int code, void *userdata, int64_t offset, pa_memchunk *chunk);
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pa_usec_t pa_source_output_set_requested_latency_within_thread(pa_source_output *o, pa_usec_t usec);
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/* Calls the attach() callback if it's set. The output must be in detached
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* state. */
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void pa_source_output_attach(pa_source_output *o);
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/* Calls the detach() callback if it's set and the output is attached. The
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* output is allowed to be already detached, in which case this does nothing.
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*
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* The reason why this can be called for already-detached outputs is that when
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* a filter source's output is detached, it has to detach also all outputs
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* connected to the filter source. In case the filter source's output was
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* detached because the filter source is being removed, those other outputs
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* will be moved to another source or removed, and moving and removing involve
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* detaching the outputs, but the outputs at that point are already detached.
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*
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* XXX: Moving or removing an output also involves sending messages to the
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* output's source. If the output's source is a detached filter source,
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* shouldn't sending messages to it be prohibited? The messages are processed
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* in the root source's IO thread, and when the filter source is detached, it
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* would seem logical to prohibit any interaction with the IO thread that isn't
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* any more associated with the filter source. Currently sending messages to
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* detached filter sources mostly works, because the filter sources don't
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* update their asyncmsgq pointer when detaching, so messages still find their
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* way to the old IO thread. */
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void pa_source_output_detach(pa_source_output *o);
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/* Called from the main thread, from source.c only. The normal way to set the
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* source output volume is to call pa_source_output_set_volume(), but the flat
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* volume logic in source.c needs also a function that doesn't do all the extra
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* stuff that pa_source_output_set_volume() does. This function simply sets
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* o->volume and fires change notifications. */
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void pa_source_output_set_volume_direct(pa_source_output *o, const pa_cvolume *volume);
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/* Called from the main thread, from source.c only. This shouldn't be a public
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* function, but the flat volume logic in source.c currently needs a way to
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* directly set the source output reference ratio. This function simply sets
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* o->reference_ratio and logs a message if the value changes. */
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void pa_source_output_set_reference_ratio(pa_source_output *o, const pa_cvolume *ratio);
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#define pa_source_output_assert_io_context(s) \
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pa_assert(pa_thread_mq_get() || !PA_SOURCE_OUTPUT_IS_LINKED((s)->state))
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#endif
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