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The primary reason for this change is to allow time graphs that do not go through the origin and hence smoothing starting from the origin is not desired. This change will allow passing time data into the smoother while paused and then abruptly use that data without smoothing using the 'quick fixup' flag when resuming. Primary use case is allowing recording time graphs where the data recorded originates from a time before the stream was created. The resulting graft will be shifted and should not be smoothened to go through the origin.
59 lines
2 KiB
C
59 lines
2 KiB
C
#ifndef foopulsetimesmootherhfoo
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#define foopulsetimesmootherhfoo
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/***
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This file is part of PulseAudio.
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Copyright 2007 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
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published by the Free Software Foundation; either version 2.1 of the
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License, 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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with PulseAudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#include <pulsecore/macro.h>
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#include <pulse/sample.h>
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typedef struct pa_smoother pa_smoother;
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pa_smoother* pa_smoother_new(
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pa_usec_t x_adjust_time,
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pa_usec_t x_history_time,
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pa_bool_t monotonic,
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pa_bool_t smoothing,
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unsigned min_history,
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pa_usec_t x_offset,
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pa_bool_t paused);
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void pa_smoother_free(pa_smoother* s);
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/* Adds a new value to our dataset. x = local/system time, y = remote time */
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void pa_smoother_put(pa_smoother *s, pa_usec_t x, pa_usec_t y);
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/* Returns an interpolated value based on the dataset. x = local/system time, return value = remote time */
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pa_usec_t pa_smoother_get(pa_smoother *s, pa_usec_t x);
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/* Translates a time span from the remote time domain to the local one. x = local/system time when to estimate, y_delay = remote time span */
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pa_usec_t pa_smoother_translate(pa_smoother *s, pa_usec_t x, pa_usec_t y_delay);
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void pa_smoother_set_time_offset(pa_smoother *s, pa_usec_t x_offset);
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void pa_smoother_pause(pa_smoother *s, pa_usec_t x);
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void pa_smoother_resume(pa_smoother *s, pa_usec_t x, pa_bool_t abrupt);
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void pa_smoother_reset(pa_smoother *s);
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void pa_smoother_fix_now(pa_smoother *s);
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#endif
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