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libpulse: introduce pa_context_get_tile_size() call

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This commit is contained in:
Lennart Poettering 2009-10-28 23:26:48 +01:00
parent 744490a681
commit 4538523a29
3 changed files with 37 additions and 3 deletions
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1
src/map-file
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@ -66,6 +66,7 @@ pa_context_get_source_info_list;
pa_context_get_source_output_info;
pa_context_get_source_output_info_list;
pa_context_get_state;
pa_context_get_tile_size;
pa_context_is_local;
pa_context_is_pending;
pa_context_kill_client;

17
src/pulse/context.c
View file

@ -1488,6 +1488,7 @@ pa_time_event* pa_context_rttime_new(pa_context *c, pa_usec_t usec, pa_time_even
struct timeval tv;
pa_assert(c);
pa_assert(PA_REFCNT_VALUE(c) >= 1);
pa_assert(c->mainloop);
if (usec == PA_USEC_INVALID)
@ -1502,8 +1503,10 @@ void pa_context_rttime_restart(pa_context *c, pa_time_event *e, pa_usec_t usec)
struct timeval tv;
pa_assert(c);
pa_assert(PA_REFCNT_VALUE(c) >= 1);
pa_assert(c->mainloop);
if (usec == PA_USEC_INVALID)
c->mainloop->time_restart(e, NULL);
else {
@ -1511,3 +1514,17 @@ void pa_context_rttime_restart(pa_context *c, pa_time_event *e, pa_usec_t usec)
c->mainloop->time_restart(e, &tv);
}
}
size_t pa_context_get_tile_size(pa_context *c, const pa_sample_spec *ss) {
size_t fs, mbs;
pa_assert(c);
pa_assert(PA_REFCNT_VALUE(c) >= 1);
PA_CHECK_VALIDITY_RETURN_ANY(c, !pa_detect_fork(), PA_ERR_FORKED, (size_t) -1);
PA_CHECK_VALIDITY_RETURN_ANY(c, !ss || pa_sample_spec_valid(ss), PA_ERR_INVALID, (size_t) -1);
fs = ss ? pa_frame_size(ss) : 1;
mbs = PA_ROUND_DOWN(pa_mempool_block_size_max(c->mempool), fs);
return PA_MAX(mbs, fs);
}

22
src/pulse/context.h
View file

@ -255,12 +255,28 @@ pa_operation *pa_context_proplist_remove(pa_context *c, const char *const keys[]
uint32_t pa_context_get_index(pa_context *s);
/** Create a new timer event source for the specified time (wrapper
for mainloop->time_new). \since 0.9.16 */
* for mainloop->time_new). \since 0.9.16 */
pa_time_event* pa_context_rttime_new(pa_context *c, pa_usec_t usec, pa_time_event_cb_t cb, void *userdata);
/** Restart a running or expired timer event source (wrapper
for mainloop->time_restart). \since 0.9.16 */
/** Restart a running or expired timer event source (wrapper for
* mainloop->time_restart). \since 0.9.16 */
void pa_context_rttime_restart(pa_context *c, pa_time_event *e, pa_usec_t usec);
/* Return the optimal block size for passing around audio buffers. It
* is recommended to allocate buffers of the size returned here when
* writing audio data to playback streams, if the latency constraints
* permit this. It is not recommended writing larger blocks than this
* because usually they will then be split up internally into chunks
* of this size. It is not recommended writing smaller blocks than
* this (unless required due to latency demands) because this
* increases CPU usage. If ss is NULL you will be returned the
* byte-exact tile size. If you pass a valid ss, then the tile size
* will be rounded down to multiple of the frame size. This is
* supposed to be used in a construct such as
* pa_context_get_tile_size(pa_stream_get_context(s),
* pa_stream_get_sample_spec(ss)); \since 0.9.20 */
size_t pa_context_get_tile_size(pa_context *c, const pa_sample_spec *ss);
PA_C_DECL_END
#endif