diff options
author | Lennart Poettering <lennart@poettering.net> | 2009-10-28 23:26:48 +0100 |
---|---|---|
committer | Lennart Poettering <lennart@poettering.net> | 2009-10-28 23:26:48 +0100 |
commit | 4538523a2999ee36e19f3f09a8ca5328185f9a67 (patch) | |
tree | b53317a8c449e4b2916805188c5714842465042b | |
parent | 744490a681be7356efba4160bfb29a3e76e85888 (diff) |
libpulse: introduce pa_context_get_tile_size() call
-rw-r--r-- | src/map-file | 1 | ||||
-rw-r--r-- | src/pulse/context.c | 17 | ||||
-rw-r--r-- | src/pulse/context.h | 22 |
3 files changed, 37 insertions, 3 deletions
diff --git a/src/map-file b/src/map-file index 6f7bdace6..50111224c 100644 --- a/src/map-file +++ b/src/map-file @@ -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; diff --git a/src/pulse/context.c b/src/pulse/context.c index 7468d0a94..e33143d95 100644 --- a/src/pulse/context.c +++ b/src/pulse/context.c @@ -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); +} diff --git a/src/pulse/context.h b/src/pulse/context.h index ecff58dfc..6ac8ee566 100644 --- a/src/pulse/context.h +++ b/src/pulse/context.h @@ -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 |