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define minimal and maximal wakeup/sleep times; check for underrun condition only once during buffer fillup

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git-svn-id: file:///home/lennart/svn/public/pulseaudio/branches/glitch-free@2312 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering 2008-04-23 23:22:51 +00:00
parent 5353cf45f5
commit caf742a076
2 changed files with 68 additions and 10 deletions
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43
src/modules/module-alsa-sink.c
View file

@ -94,6 +94,8 @@ static const char* const valid_modargs[] = {
#define DEFAULT_DEVICE "default"
#define DEFAULT_TSCHED_BUFFER_USEC (5*PA_USEC_PER_SEC) /* 5s */
#define DEFAULT_TSCHED_WATERMARK_USEC (20*PA_USEC_PER_MSEC) /* 20ms */
#define TSCHED_MIN_SLEEP_USEC (3*PA_USEC_PER_MSEC) /* 3ms */
#define TSCHED_MIN_WAKEUP_USEC (3*PA_USEC_PER_MSEC) /* 3ms */
struct userdata {
pa_core *core;
@ -121,7 +123,7 @@ struct userdata {
pa_bool_t use_mmap, use_tsched;
pa_bool_t first;
pa_bool_t first, after_rewind;
pa_rtpoll_item *alsa_rtpoll_item;
@ -135,12 +137,29 @@ struct userdata {
static void fix_tsched_watermark(struct userdata *u) {
size_t max_use;
size_t min_sleep, min_wakeup;
pa_assert(u);
max_use = u->hwbuf_size - u->hwbuf_unused_frames * u->frame_size;
if (u->tsched_watermark >= max_use-u->frame_size)
u->tsched_watermark = max_use-u->frame_size;
min_sleep = pa_usec_to_bytes(TSCHED_MIN_SLEEP_USEC, &u->sink->sample_spec);
min_wakeup = pa_usec_to_bytes(TSCHED_MIN_WAKEUP_USEC, &u->sink->sample_spec);
if (min_sleep > max_use/2)
min_sleep = pa_frame_align(max_use/2, &u->sink->sample_spec);
if (min_sleep < u->frame_size)
min_sleep = u->frame_size;
if (min_wakeup > max_use/2)
min_wakeup = pa_frame_align(max_use/2, &u->sink->sample_spec);
if (min_wakeup < u->frame_size)
min_wakeup = u->frame_size;
if (u->tsched_watermark > max_use-min_sleep)
u->tsched_watermark = max_use-min_sleep;
if (u->tsched_watermark < min_wakeup)
u->tsched_watermark = min_wakeup;
}
static int try_recover(struct userdata *u, const char *call, int err) {
@ -170,7 +189,7 @@ static int try_recover(struct userdata *u, const char *call, int err) {
static void check_left_to_play(struct userdata *u, snd_pcm_sframes_t n) {
size_t left_to_play;
if (u->first)
if (u->first || u->after_rewind)
return;
if (n*u->frame_size < u->hwbuf_size)
@ -198,6 +217,7 @@ static void check_left_to_play(struct userdata *u, snd_pcm_sframes_t n) {
static int mmap_write(struct userdata *u) {
int work_done = 0;
pa_bool_t checked_left_to_play = FALSE;
pa_assert(u);
pa_sink_assert_ref(u->sink);
@ -225,7 +245,10 @@ static int mmap_write(struct userdata *u) {
return r;
}
check_left_to_play(u, n);
if (!checked_left_to_play) {
check_left_to_play(u, n);
checked_left_to_play = TRUE;
}
/* We only use part of the buffer that matches our
* dynamically requested latency */
@ -294,6 +317,7 @@ static int mmap_write(struct userdata *u) {
static int unix_write(struct userdata *u) {
int work_done = 0;
pa_bool_t checked_left_to_play = FALSE;
pa_assert(u);
pa_sink_assert_ref(u->sink);
@ -315,7 +339,10 @@ static int unix_write(struct userdata *u) {
return r;
}
check_left_to_play(u, n);
if (!checked_left_to_play) {
check_left_to_play(u, n);
checked_left_to_play = TRUE;
}
if (PA_UNLIKELY(n <= u->hwbuf_unused_frames))
return work_done;
@ -862,6 +889,8 @@ static int process_rewind(struct userdata *u) {
u->frame_index -= out_frames;
pa_log_debug("Rewound %lu bytes.", (unsigned long) rewind_nbytes);
pa_sink_process_rewind(u->sink, rewind_nbytes);
u->after_rewind = TRUE;
}
} else
pa_log_debug("Mhmm, actually there is nothing to rewind.");
@ -938,6 +967,7 @@ static void thread_func(void *userdata) {
}
u->first = FALSE;
u->after_rewind = FALSE;
} else if (u->use_tsched)
@ -1071,6 +1101,7 @@ int pa__init(pa_module*m) {
u->use_mmap = use_mmap;
u->use_tsched = use_tsched;
u->first = TRUE;
u->after_rewind = FALSE;
u->rtpoll = pa_rtpoll_new();
pa_thread_mq_init(&u->thread_mq, m->core->mainloop, u->rtpoll);
u->alsa_rtpoll_item = NULL;

35
src/modules/module-alsa-source.c
View file

@ -95,6 +95,8 @@ static const char* const valid_modargs[] = {
#define DEFAULT_DEVICE "default"
#define DEFAULT_TSCHED_BUFFER_USEC (5*PA_USEC_PER_SEC)
#define DEFAULT_TSCHED_WATERMARK_USEC (20*PA_USEC_PER_MSEC)
#define TSCHED_MIN_SLEEP_USEC (3*PA_USEC_PER_MSEC) /* 3ms */
#define TSCHED_MIN_WAKEUP_USEC (3*PA_USEC_PER_MSEC) /* 3ms */
struct userdata {
pa_core *core;
@ -133,12 +135,29 @@ struct userdata {
static void fix_tsched_watermark(struct userdata *u) {
size_t max_use;
size_t min_sleep, min_wakeup;
pa_assert(u);
max_use = u->hwbuf_size - u->hwbuf_unused_frames * u->frame_size;
if (u->tsched_watermark >= max_use-u->frame_size)
u->tsched_watermark = max_use-u->frame_size;
min_sleep = pa_usec_to_bytes(TSCHED_MIN_SLEEP_USEC, &u->source->sample_spec);
min_wakeup = pa_usec_to_bytes(TSCHED_MIN_WAKEUP_USEC, &u->source->sample_spec);
if (min_sleep > max_use/2)
min_sleep = pa_frame_align(max_use/2, &u->source->sample_spec);
if (min_sleep < u->frame_size)
min_sleep = u->frame_size;
if (min_wakeup > max_use/2)
min_wakeup = pa_frame_align(max_use/2, &u->source->sample_spec);
if (min_wakeup < u->frame_size)
min_wakeup = u->frame_size;
if (u->tsched_watermark > max_use-min_sleep)
u->tsched_watermark = max_use-min_sleep;
if (u->tsched_watermark < min_wakeup)
u->tsched_watermark = min_wakeup;
}
static int try_recover(struct userdata *u, const char *call, int err) {
@ -193,6 +212,7 @@ static void check_left_to_record(struct userdata *u, snd_pcm_sframes_t n) {
static int mmap_read(struct userdata *u) {
int work_done = 0;
pa_bool_t checked_left_to_record = FALSE;
pa_assert(u);
pa_source_assert_ref(u->source);
@ -217,7 +237,10 @@ static int mmap_read(struct userdata *u) {
return r;
}
check_left_to_record(u, n);
if (checked_left_to_record) {
check_left_to_record(u, n);
checked_left_to_record = TRUE;
}
if (PA_UNLIKELY(n <= 0))
return work_done;
@ -280,6 +303,7 @@ static int mmap_read(struct userdata *u) {
static int unix_read(struct userdata *u) {
int work_done = 0;
pa_bool_t checked_left_to_record = FALSE;
pa_assert(u);
pa_source_assert_ref(u->source);
@ -302,7 +326,10 @@ static int unix_read(struct userdata *u) {
return r;
}
check_left_to_record(u, n);
if (checked_left_to_record) {
check_left_to_record(u, n);
checked_left_to_record = TRUE;
}
if (PA_UNLIKELY(n <= 0))
return work_done;