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https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
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9f70ad3c95
This patch integrates the uplink sink feature of module-virtual-source into the virtual source library, so that every virtual source can use it. The patch also introduces latency handling and rewinding for the uplink sink. Similar to the monitor source, the only useful definition of the latency appears to be the negative of the master source latency. Rewinding will not be possible in most situations, because the underlying memblockq is nearly always empty. module-combine-sink and module-suspend-on-idle required some changes to deal correctly with this type of sink.
74 lines
3.5 KiB
C
74 lines
3.5 KiB
C
/***
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This file is part of PulseAudio.
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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/source.h>
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#include <pulsecore/modargs.h>
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/* Callbacks for virtual sources. */
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int pa_virtual_source_process_msg(pa_msgobject *o, int code, void *data, int64_t offset, pa_memchunk *chunk);
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int pa_virtual_source_set_state_in_main_thread(pa_source *s, pa_source_state_t state, pa_suspend_cause_t suspend_cause);
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int pa_virtual_source_set_state_in_io_thread(pa_source *s, pa_source_state_t new_state, pa_suspend_cause_t new_suspend_cause);
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void pa_virtual_source_update_requested_latency(pa_source *s);
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void pa_virtual_source_set_volume(pa_source *s);
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void pa_virtual_source_set_mute(pa_source *s);
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void pa_virtual_source_output_push(pa_source_output *o, const pa_memchunk *chunk);
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void pa_virtual_source_output_update_source_latency_range(pa_source_output *o);
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void pa_virtual_source_output_update_source_fixed_latency(pa_source_output *o);
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void pa_virtual_source_output_process_rewind(pa_source_output *o, size_t nbytes);
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void pa_virtual_source_output_update_max_rewind(pa_source_output *o, size_t nbytes);
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void pa_virtual_source_output_detach(pa_source_output *o);
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void pa_virtual_source_output_attach(pa_source_output *o);
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void pa_virtual_source_output_kill(pa_source_output *o);
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void pa_virtual_source_output_moving(pa_source_output *o, pa_source *dest);
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bool pa_virtual_source_output_may_move_to(pa_source_output *o, pa_source *dest);
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void pa_virtual_source_output_volume_changed(pa_source_output *o);
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void pa_virtual_source_output_mute_changed(pa_source_output *o);
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void pa_virtual_source_output_suspend(pa_source_output *o, pa_source_state_t old_state, pa_suspend_cause_t old_suspend_cause);
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/* Set callbacks for virtual source and source output. */
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void pa_virtual_source_set_callbacks(pa_source *s, bool use_volume_sharing);
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void pa_virtual_source_output_set_callbacks(pa_source_output *o, bool use_volume_sharing);
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/* Create a new virtual source. Returns a filled vsource structure or NULL on failure. */
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pa_vsource *pa_virtual_source_create(pa_source *master, const char *source_type, const char *desc_prefix,
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pa_sample_spec *source_ss, pa_channel_map *source_map,
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pa_sample_spec *source_output_ss, pa_channel_map *source_output_map,
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pa_module *m, void *userdata, pa_modargs *ma,
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bool use_volume_sharing, bool create_memblockq);
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/* Activate the new virtual source. */
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int pa_virtual_source_activate(pa_vsource *vs);
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/* Destroys the objects associated with the virtual source. */
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void pa_virtual_source_destroy(pa_vsource *vs);
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/* Create vsource structure */
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pa_vsource* pa_virtual_source_vsource_new(pa_source *s);
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/* Update filter parameters */
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void pa_virtual_source_request_parameter_update(pa_vsource *vs, void *parameters);
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/* Post data, mix in uplink sink */
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void pa_virtual_source_post(pa_source *s, const pa_memchunk *chunk);
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