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-rw-r--r--src/polyp/def.h44
-rw-r--r--src/polyp/internal.h44
-rw-r--r--src/polyp/stream.c425
-rw-r--r--src/polyp/stream.h30
4 files changed, 323 insertions, 220 deletions
diff --git a/src/polyp/def.h b/src/polyp/def.h
index 98420bc0..93d0996b 100644
--- a/src/polyp/def.h
+++ b/src/polyp/def.h
@@ -80,7 +80,7 @@ typedef enum pa_stream_direction {
/** Some special flags for stream connections. \since 0.6 */
typedef enum pa_stream_flags {
PA_STREAM_START_CORKED = 1, /**< Create the stream corked, requiring an explicit pa_stream_cork() call to uncork it. */
- PA_STREAM_INTERPOLATE_LATENCY = 2 /**< Interpolate the latency for
+ PA_STREAM_INTERPOLATE_LATENCY = 2, /**< Interpolate the latency for
* this stream. When enabled,
* you can use
* pa_stream_interpolated_xxx()
@@ -95,6 +95,7 @@ typedef enum pa_stream_flags {
* information. This is
* especially useful on long latency
* network connections. */
+ PA_STREAM_NOT_MONOTONOUS = 4, /**< Don't force the time to run monotonically */
} pa_stream_flags_t;
/** Playback and record buffer metrics */
@@ -124,7 +125,7 @@ enum {
PA_ERR_INVALIDSERVER, /**< Invalid server */
PA_ERR_MODINITFAILED, /**< Module initialization failed */
PA_ERR_BADSTATE, /**< Bad state */
- PA_ERR_NODATA, /**< No data */
+ PA_ERR_NODATA, /**< No data */
PA_ERR_VERSION, /**< Incompatible protocol version \since 0.8 */
PA_ERR_MAX /**< Not really an error but the first invalid error code */
};
@@ -171,7 +172,7 @@ typedef enum pa_subscription_event_type {
* pa_stream_write() takes to be played may be estimated by
* sink_usec+buffer_usec+transport_usec. The output buffer to which
* buffer_usec relates may be manipulated freely (with
- * pa_stream_write()'s delta argument, pa_stream_flush() and friends),
+ * pa_stream_write()'s seek argument, pa_stream_flush() and friends),
* the buffers sink_usec/source_usec relates to is a first-in
* first-out buffer which cannot be flushed or manipulated in any
* way. The total input latency a sample that is recorded takes to be
@@ -180,12 +181,7 @@ typedef enum pa_subscription_event_type {
* sign issues!) When connected to a monitor source sink_usec contains
* the latency of the owning sink.*/
typedef struct pa_latency_info {
- pa_usec_t buffer_usec; /**< Time in usecs the current buffer takes to play. For both playback and record streams. */
- pa_usec_t sink_usec; /**< Time in usecs a sample takes to be played on the sink. For playback streams and record streams connected to a monitor source. */
- pa_usec_t source_usec; /**< Time in usecs a sample takes from being recorded to being delivered to the application. Only for record streams. \since 0.5*/
- pa_usec_t transport_usec; /**< Estimated time in usecs a sample takes to be transferred to/from the daemon. For both playback and record streams. \since 0.5 */
- int playing; /**< Non-zero when the stream is currently playing. Only for playback streams. */
- uint32_t queue_length; /**< Queue size in bytes. For both playback and record streams. */
+ struct timeval timestamp; /**< The time when this latency info was current */
int synchronized_clocks; /**< Non-zero if the local and the
* remote machine have synchronized
* clocks. If synchronized clocks are
@@ -194,10 +190,31 @@ typedef struct pa_latency_info {
* detects synchronized clocks is very
* limited und unreliable itself. \since
* 0.5 */
- struct timeval timestamp; /**< The time when this latency info was current */
- uint64_t counter; /**< The byte counter current when the latency info was requested. \since 0.6 */
- int64_t write_index; /**< Current absolute write index in the buffer. \since 0.8 */
- int64_t read_index; /**< Current absolute read index in the buffer. \since 0.8 */
+
+ pa_usec_t buffer_usec; /**< Time in usecs the current buffer takes to play. For both playback and record streams. */
+ pa_usec_t sink_usec; /**< Time in usecs a sample takes to be played on the sink. For playback streams and record streams connected to a monitor source. */
+ pa_usec_t source_usec; /**< Time in usecs a sample takes from being recorded to being delivered to the application. Only for record streams. \since 0.5*/
+ pa_usec_t transport_usec; /**< Estimated time in usecs a sample takes to be transferred to/from the daemon. For both playback and record streams. \since 0.5 */
+
+ int playing; /**< Non-zero when the stream is currently playing. Only for playback streams. */
+
+ int write_index_corrupt; /**< Non-Zero if the write_index is not up to date because a local write command corrupted it */
+ int64_t write_index; /**< Current write index into the
+ * playback buffer in bytes. Think twice before
+ * using this for seeking purposes: it
+ * might be out of date a the time you
+ * want to use it. Consider using
+ * PA_SEEK_RELATIVE instead. \since
+ * 0.8 */
+ int64_t read_index; /**< Current read index into the
+ * playback buffer in bytes. Think twice before
+ * using this for seeking purposes: it
+ * might be out of date a the time you
+ * want to use it. Consider using
+ * PA_SEEK_RELATIVE_ON_READ
+ * instead. \since 0.8 */
+
+ uint32_t buffer_length; /* Current buffer length. This is usually identical to write_index-read_index. */
} pa_latency_info;
/** A structure for the spawn api. This may be used to integrate auto
@@ -227,7 +244,6 @@ typedef enum pa_seek_mode {
PA_SEEK_RELATIVE_END = 3, /**< Seek relatively to the current end of the buffer queue */
} pa_seek_mode_t;
-
PA_C_DECL_END
#endif
diff --git a/src/polyp/internal.h b/src/polyp/internal.h
index 82d8f7ce..8f1603b3 100644
--- a/src/polyp/internal.h
+++ b/src/polyp/internal.h
@@ -83,6 +83,15 @@ struct pa_context {
pa_client_conf *conf;
};
+#define PA_MAX_LATENCY_CORRECTIONS 10
+
+typedef struct pa_latency_correction {
+ uint32_t tag;
+ int valid;
+ int64_t value;
+ int absolute, corrupt;
+} pa_latency_correction;
+
struct pa_stream {
int ref;
pa_context *context;
@@ -93,41 +102,48 @@ struct pa_stream {
pa_buffer_attr buffer_attr;
pa_sample_spec sample_spec;
pa_channel_map channel_map;
+ pa_stream_flags_t flags;
uint32_t channel;
uint32_t syncid;
int channel_valid;
uint32_t device_index;
pa_stream_direction_t direction;
- uint32_t requested_bytes;
- uint64_t counter;
- pa_usec_t previous_time;
- pa_usec_t previous_ipol_time;
pa_stream_state_t state;
+
+ uint32_t requested_bytes;
+
pa_memchunk peek_memchunk;
pa_memblockq *record_memblockq;
- pa_hashmap *counter_hashmap;
-
- int interpolate;
int corked;
- uint32_t ipol_usec;
- struct timeval ipol_timestamp;
+ /* Store latest latency info */
+ pa_latency_info latency_info;
+ int latency_info_valid;
+
+ /* Use to make sure that time advances monotonically */
+ pa_usec_t previous_time;
+
+ /* Latency correction stuff */
+ pa_latency_correction latency_corrections[PA_MAX_LATENCY_CORRECTIONS];
+ int idx_latency_correction;
+
+ /* Latency interpolation stuff */
pa_time_event *ipol_event;
int ipol_requested;
-
+ pa_usec_t ipol_usec;
+ int ipol_usec_valid;
+ struct timeval ipol_timestamp;
+
+ /* Callbacks */
pa_stream_notify_cb_t state_callback;
void *state_userdata;
-
pa_stream_request_cb_t read_callback;
void *read_userdata;
-
pa_stream_request_cb_t write_callback;
void *write_userdata;
-
pa_stream_notify_cb_t overflow_callback;
void *overflow_userdata;
-
pa_stream_notify_cb_t underflow_callback;
void *underflow_userdata;
};
diff --git a/src/polyp/stream.c b/src/polyp/stream.c
index 672c376a..d3599582 100644
--- a/src/polyp/stream.c
+++ b/src/polyp/stream.c
@@ -38,10 +38,10 @@
#include "internal.h"
#define LATENCY_IPOL_INTERVAL_USEC (10000L)
-#define COUNTER_HASHMAP_MAXSIZE (5)
pa_stream *pa_stream_new(pa_context *c, const char *name, const pa_sample_spec *ss, const pa_channel_map *map) {
pa_stream *s;
+ int i;
assert(c);
@@ -67,6 +67,7 @@ pa_stream *pa_stream_new(pa_context *c, const char *name, const pa_sample_spec *
s->direction = PA_STREAM_NODIRECTION;
s->name = pa_xstrdup(name);
s->sample_spec = *ss;
+ s->flags = 0;
if (map)
s->channel_map = *map;
@@ -87,20 +88,21 @@ pa_stream *pa_stream_new(pa_context *c, const char *name, const pa_sample_spec *
s->record_memblockq = NULL;
- s->counter_hashmap = pa_hashmap_new(NULL, NULL);
-
- s->counter = 0;
s->previous_time = 0;
- s->previous_ipol_time = 0;
+ s->latency_info_valid = 0;
s->corked = 0;
- s->interpolate = 0;
- s->ipol_usec = 0;
- memset(&s->ipol_timestamp, 0, sizeof(s->ipol_timestamp));
+ s->ipol_usec_valid = 0;
+ s->ipol_timestamp.tv_sec = 0;
+ s->ipol_timestamp.tv_usec = 0;
s->ipol_event = NULL;
s->ipol_requested = 0;
+ for (i = 0; i < PA_MAX_LATENCY_CORRECTIONS; i++)
+ s->latency_corrections[i].valid = 0;
+ s->idx_latency_correction = 0;
+
PA_LLIST_PREPEND(pa_stream, c->streams, s);
/* The context and stream will point at each other. We cannot ref count
@@ -110,10 +112,6 @@ pa_stream *pa_stream_new(pa_context *c, const char *name, const pa_sample_spec *
return s;
}
-static void hashmap_free_func(void *p, void *userdata) {
- pa_xfree(p);
-}
-
static void stream_free(pa_stream *s) {
assert(s && s->context && !s->channel_valid);
@@ -132,9 +130,6 @@ static void stream_free(pa_stream *s) {
if (s->record_memblockq)
pa_memblockq_free(s->record_memblockq);
- if (s->counter_hashmap)
- pa_hashmap_free(s->counter_hashmap, hashmap_free_func, NULL);
-
pa_xfree(s->name);
pa_xfree(s);
}
@@ -315,10 +310,11 @@ static void ipol_callback(pa_mainloop_api *m, pa_time_event *e, PA_GCC_UNUSED co
if (s->state == PA_STREAM_READY && !s->ipol_requested) {
pa_operation *o;
- o = pa_stream_get_latency_info(s, NULL, NULL);
- if (o)
+
+ if ((o = pa_stream_update_latency_info(s, NULL, NULL))) {
pa_operation_unref(o);
- s->ipol_requested = 1;
+ s->ipol_requested = 1;
+ }
}
pa_gettimeofday(&next);
@@ -375,7 +371,7 @@ void pa_create_stream_callback(pa_pdispatch *pd, uint32_t command, PA_GCC_UNUSED
/* We add an extra ref as long as we're connected (i.e. in the dynarray) */
pa_stream_ref(s);
- if (s->interpolate) {
+ if (s->flags & PA_STREAM_INTERPOLATE_LATENCY) {
struct timeval tv;
pa_gettimeofday(&tv);
@@ -418,13 +414,11 @@ static int create_stream(
pa_stream_ref(s);
s->direction = direction;
+ s->flags = flags;
if (sync_stream)
s->syncid = sync_stream->syncid;
- s->interpolate = !!(flags & PA_STREAM_INTERPOLATE_LATENCY);
- pa_stream_trash_ipol(s);
-
if (attr)
s->buffer_attr = *attr;
else {
@@ -548,7 +542,33 @@ int pa_stream_write(
else
s->requested_bytes = 0;
- s->counter += length;
+ /* Update latency request correction */
+ if (s->latency_corrections[s->idx_latency_correction].valid) {
+
+ if (seek == PA_SEEK_ABSOLUTE) {
+ s->latency_corrections[s->idx_latency_correction].corrupt = 0;
+ s->latency_corrections[s->idx_latency_correction].absolute = 1;
+ s->latency_corrections[s->idx_latency_correction].value = offset + length;
+ } else if (seek == PA_SEEK_RELATIVE) {
+ if (!s->latency_corrections[s->idx_latency_correction].corrupt)
+ s->latency_corrections[s->idx_latency_correction].value += offset + length;
+ } else
+ s->latency_corrections[s->idx_latency_correction].corrupt = 1;
+ }
+
+ /* Update the write index in the already available latency data */
+ if (s->latency_info_valid) {
+
+ if (seek == PA_SEEK_ABSOLUTE) {
+ s->latency_info.write_index_corrupt = 0;
+ s->latency_info.write_index = offset + length;
+ } else if (seek == PA_SEEK_RELATIVE) {
+ if (!s->latency_info.write_index_corrupt)
+ s->latency_info.write_index += offset + length;
+ } else
+ s->latency_info.write_index_corrupt = 1;
+ }
+
return 0;
}
@@ -590,7 +610,6 @@ int pa_stream_drop(pa_stream *s) {
s->peek_memchunk.index = 0;
s->peek_memchunk.memblock = NULL;
- s->counter += s->peek_memchunk.length;
return 0;
}
@@ -637,33 +656,34 @@ pa_operation * pa_stream_drain(pa_stream *s, pa_stream_success_cb_t cb, void *us
static void stream_get_latency_info_callback(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) {
pa_operation *o = userdata;
- pa_latency_info i, *p = NULL;
struct timeval local, remote, now;
+ pa_latency_info *i;
assert(pd);
assert(o);
assert(o->stream);
assert(o->context);
- i.counter = *(uint64_t*)pa_hashmap_get(o->stream->counter_hashmap, (void*)(unsigned long)tag);
- pa_xfree(pa_hashmap_remove(o->stream->counter_hashmap, (void*)(unsigned long)tag));
+ i = &o->stream->latency_info;
+ o->stream->latency_info_valid = 0;
+ i->write_index_corrupt = 0;
if (command != PA_COMMAND_REPLY) {
if (pa_context_handle_error(o->context, command, t) < 0)
goto finish;
- } else if (pa_tagstruct_get_usec(t, &i.buffer_usec) < 0 ||
- pa_tagstruct_get_usec(t, &i.sink_usec) < 0 ||
- pa_tagstruct_get_usec(t, &i.source_usec) < 0 ||
- pa_tagstruct_get_boolean(t, &i.playing) < 0 ||
- pa_tagstruct_getu32(t, &i.queue_length) < 0 ||
+ } else if (pa_tagstruct_get_usec(t, &i->buffer_usec) < 0 ||
+ pa_tagstruct_get_usec(t, &i->sink_usec) < 0 ||
+ pa_tagstruct_get_usec(t, &i->source_usec) < 0 ||
+ pa_tagstruct_get_boolean(t, &i->playing) < 0 ||
pa_tagstruct_get_timeval(t, &local) < 0 ||
pa_tagstruct_get_timeval(t, &remote) < 0 ||
- pa_tagstruct_gets64(t, &i.write_index) < 0 ||
- pa_tagstruct_gets64(t, &i.read_index) < 0 ||
+ pa_tagstruct_gets64(t, &i->write_index) < 0 ||
+ pa_tagstruct_gets64(t, &i->read_index) < 0 ||
!pa_tagstruct_eof(t)) {
pa_context_fail(o->context, PA_ERR_PROTOCOL);
goto finish;
+
} else {
pa_gettimeofday(&now);
@@ -671,72 +691,125 @@ static void stream_get_latency_info_callback(pa_pdispatch *pd, uint32_t command,
/* local and remote seem to have synchronized clocks */
if (o->stream->direction == PA_STREAM_PLAYBACK)
- i.transport_usec = pa_timeval_diff(&remote, &local);
+ i->transport_usec = pa_timeval_diff(&remote, &local);
else
- i.transport_usec = pa_timeval_diff(&now, &remote);
+ i->transport_usec = pa_timeval_diff(&now, &remote);
- i.synchronized_clocks = 1;
- i.timestamp = remote;
+ i->synchronized_clocks = 1;
+ i->timestamp = remote;
} else {
/* clocks are not synchronized, let's estimate latency then */
- i.transport_usec = pa_timeval_diff(&now, &local)/2;
- i.synchronized_clocks = 0;
- i.timestamp = local;
- pa_timeval_add(&i.timestamp, i.transport_usec);
+ i->transport_usec = pa_timeval_diff(&now, &local)/2;
+ i->synchronized_clocks = 0;
+ i->timestamp = local;
+ pa_timeval_add(&i->timestamp, i->transport_usec);
}
-
- if (o->stream->interpolate) {
-/* pa_log("new interpol data"); */
- o->stream->ipol_timestamp = i.timestamp;
- o->stream->ipol_usec = pa_stream_get_time(o->stream, &i);
- o->stream->ipol_requested = 0;
+
+ if (o->stream->direction == PA_STREAM_PLAYBACK) {
+ /* Write index correction */
+
+ int n, j;
+ uint32_t ctag = tag;
+
+ /* Go through the saved correction values and add up the total correction.*/
+
+ for (n = 0, j = o->stream->idx_latency_correction;
+ n < PA_MAX_LATENCY_CORRECTIONS;
+ n++, j = (j + 1) % PA_MAX_LATENCY_CORRECTIONS) {
+
+ /* Step over invalid data or out-of-date data */
+ if (!o->stream->latency_corrections[j].valid ||
+ o->stream->latency_corrections[j].tag < ctag)
+ continue;
+
+ /* Make sure that everything is in order */
+ ctag = o->stream->latency_corrections[j].tag+1;
+
+ /* Now fix the write index */
+ if (o->stream->latency_corrections[j].corrupt) {
+ /* A corrupting seek was made */
+ i->write_index = 0;
+ i->write_index_corrupt = 1;
+ } else if (o->stream->latency_corrections[j].absolute) {
+ /* An absolute seek was made */
+ i->write_index = o->stream->latency_corrections[j].value;
+ i->write_index_corrupt = 0;
+ } else if (!i->write_index_corrupt) {
+ /* A relative seek was made */
+ i->write_index += o->stream->latency_corrections[j].value;
+ }
+ }
}
+
+ o->stream->latency_info_valid = 1;
+
+ o->stream->ipol_timestamp = now;
+ o->stream->ipol_usec_valid = 0;
+ }
- p = &i;
+ /* Clear old correction entries */
+ if (o->stream->direction == PA_STREAM_PLAYBACK) {
+ int n;
+
+ for (n = 0; n < PA_MAX_LATENCY_CORRECTIONS; n++) {
+ if (!o->stream->latency_corrections[n].valid)
+ continue;
+
+ if (o->stream->latency_corrections[n].tag <= tag)
+ o->stream->latency_corrections[n].valid = 0;
+ }
}
if (o->callback) {
- pa_stream_get_latency_info_cb_t cb = (pa_stream_get_latency_info_cb_t) o->callback;
- cb(o->stream, p, o->userdata);
+ pa_stream_success_cb_t cb = (pa_stream_success_cb_t) o->callback;
+ cb(o->stream, o->stream->latency_info_valid, o->userdata);
}
-
+
finish:
+
pa_operation_done(o);
pa_operation_unref(o);
}
-pa_operation* pa_stream_get_latency_info(pa_stream *s, pa_stream_get_latency_info_cb_t cb, void *userdata) {
+pa_operation* pa_stream_update_latency_info(pa_stream *s, pa_stream_success_cb_t cb, void *userdata) {
uint32_t tag;
pa_operation *o;
pa_tagstruct *t;
struct timeval now;
- uint64_t *counter;
+ int cidx;
assert(s);
assert(s->ref >= 1);
PA_CHECK_VALIDITY_RETURN_NULL(s->context, s->state == PA_STREAM_READY, PA_ERR_BADSTATE);
PA_CHECK_VALIDITY_RETURN_NULL(s->context, s->direction != PA_STREAM_UPLOAD, PA_ERR_BADSTATE);
- PA_CHECK_VALIDITY_RETURN_NULL(s->context, pa_hashmap_size(s->counter_hashmap) < COUNTER_HASHMAP_MAXSIZE, PA_ERR_INTERNAL);
+
+ /* Find a place to store the write_index correction data for this entry */
+ cidx = (s->idx_latency_correction + 1) % PA_MAX_LATENCY_CORRECTIONS;
+
+ /* Check if we could allocate a correction slot. If not, there are too many outstanding queries */
+ PA_CHECK_VALIDITY_RETURN_NULL(s->context, !s->latency_corrections[cidx].valid, PA_ERR_INTERNAL);
o = pa_operation_new(s->context, s, (pa_operation_cb_t) cb, userdata);
-
+
t = pa_tagstruct_command(
s->context,
s->direction == PA_STREAM_PLAYBACK ? PA_COMMAND_GET_PLAYBACK_LATENCY : PA_COMMAND_GET_RECORD_LATENCY,
&tag);
pa_tagstruct_putu32(t, s->channel);
-
- pa_gettimeofday(&now);
- pa_tagstruct_put_timeval(t, &now);
+ pa_tagstruct_put_timeval(t, pa_gettimeofday(&now));
pa_pstream_send_tagstruct(s->context->pstream, t);
pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, stream_get_latency_info_callback, o);
- counter = pa_xmalloc(sizeof(uint64_t));
- *counter = s->counter;
- pa_hashmap_put(s->counter_hashmap, (void*)(unsigned long)tag, counter);
-
+ /* Fill in initial correction data */
+ o->stream->idx_latency_correction = cidx;
+ o->stream->latency_corrections[cidx].valid = 1;
+ o->stream->latency_corrections[cidx].tag = tag;
+ o->stream->latency_corrections[cidx].absolute = 0;
+ o->stream->latency_corrections[cidx].value = 0;
+ o->stream->latency_corrections[cidx].corrupt = 0;
+
return pa_operation_ref(o);
}
@@ -872,11 +945,11 @@ pa_operation* pa_stream_cork(pa_stream *s, int b, pa_stream_success_cb_t cb, voi
PA_CHECK_VALIDITY_RETURN_NULL(s->context, s->state == PA_STREAM_READY, PA_ERR_BADSTATE);
PA_CHECK_VALIDITY_RETURN_NULL(s->context, s->direction != PA_STREAM_UPLOAD, PA_ERR_BADSTATE);
- if (s->interpolate) {
- if (!s->corked && b)
- /* Pausing */
- s->ipol_usec = pa_stream_get_interpolated_time(s);
- else if (s->corked && !b)
+ if (s->flags & PA_STREAM_INTERPOLATE_LATENCY) {
+ if (!s->corked && b) {
+ /* Refresh the interpolated data just befor pausing */
+ pa_stream_get_time(s, NULL);
+ } else if (s->corked && !b)
/* Unpausing */
pa_gettimeofday(&s->ipol_timestamp);
}
@@ -894,8 +967,7 @@ pa_operation* pa_stream_cork(pa_stream *s, int b, pa_stream_success_cb_t cb, voi
pa_pstream_send_tagstruct(s->context->pstream, t);
pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, pa_stream_simple_ack_callback, o);
- lo = pa_stream_get_latency_info(s, NULL, NULL);
- if (lo)
+ if ((lo = pa_stream_update_latency_info(s, NULL, NULL)))
pa_operation_unref(lo);
return pa_operation_ref(o);
@@ -928,8 +1000,8 @@ pa_operation* pa_stream_flush(pa_stream *s, pa_stream_success_cb_t cb, void *use
if ((o = stream_send_simple_command(s, s->direction == PA_STREAM_PLAYBACK ? PA_COMMAND_FLUSH_PLAYBACK_STREAM : PA_COMMAND_FLUSH_RECORD_STREAM, cb, userdata))) {
pa_operation *lo;
- lo = pa_stream_get_latency_info(s, NULL, NULL);
- if (lo)
+
+ if ((lo = pa_stream_update_latency_info(s, NULL, NULL)))
pa_operation_unref(lo);
}
@@ -943,8 +1015,8 @@ pa_operation* pa_stream_prebuf(pa_stream *s, pa_stream_success_cb_t cb, void *us
if ((o = stream_send_simple_command(s, PA_COMMAND_PREBUF_PLAYBACK_STREAM, cb, userdata))) {
pa_operation *lo;
- lo = pa_stream_get_latency_info(s, NULL, NULL);
- if (lo)
+
+ if ((lo = pa_stream_update_latency_info(s, NULL, NULL)))
pa_operation_unref(lo);
}
@@ -958,8 +1030,8 @@ pa_operation* pa_stream_trigger(pa_stream *s, pa_stream_success_cb_t cb, void *u
if ((o = stream_send_simple_command(s, PA_COMMAND_TRIGGER_PLAYBACK_STREAM, cb, userdata))) {
pa_operation *lo;
- lo = pa_stream_get_latency_info(s, NULL, NULL);
- if (lo)
+
+ if ((lo = pa_stream_update_latency_info(s, NULL, NULL)))
pa_operation_unref(lo);
}
@@ -992,150 +1064,165 @@ pa_operation* pa_stream_set_name(pa_stream *s, const char *name, pa_stream_succe
return pa_operation_ref(o);
}
-uint64_t pa_stream_get_counter(pa_stream *s) {
- assert(s);
- assert(s->ref >= 1);
-
- PA_CHECK_VALIDITY_RETURN_ANY(s->context, s->state == PA_STREAM_READY, PA_ERR_BADSTATE, (uint64_t) -1);
-
- return s->counter;
-}
-
-pa_usec_t pa_stream_get_time(pa_stream *s, const pa_latency_info *i) {
- pa_usec_t usec;
+int pa_stream_get_time(pa_stream *s, pa_usec_t *r_usec) {
+ pa_usec_t usec = 0;
assert(s);
assert(s->ref >= 1);
- PA_CHECK_VALIDITY_RETURN_ANY(s->context, s->state == PA_STREAM_READY, PA_ERR_BADSTATE, (pa_usec_t) -1);
- PA_CHECK_VALIDITY_RETURN_ANY(s->context, s->direction != PA_STREAM_UPLOAD, PA_ERR_BADSTATE, (pa_usec_t) -1);
-
- usec = pa_bytes_to_usec(i->counter, &s->sample_spec);
+ PA_CHECK_VALIDITY(s->context, s->state == PA_STREAM_READY, PA_ERR_BADSTATE);
+ PA_CHECK_VALIDITY(s->context, s->direction != PA_STREAM_UPLOAD, PA_ERR_BADSTATE);
+ PA_CHECK_VALIDITY(s->context, s->latency_info_valid, PA_ERR_NODATA);
- if (i) {
+ if (s->flags & PA_STREAM_INTERPOLATE_LATENCY && s->ipol_usec_valid )
+ usec = s->ipol_usec;
+ else {
if (s->direction == PA_STREAM_PLAYBACK) {
- pa_usec_t latency = i->transport_usec + i->buffer_usec + i->sink_usec;
- if (usec < latency)
+ /* The last byte that was written into the output device
+ * had this time value associated */
+ usec = pa_bytes_to_usec(s->latency_info.read_index < 0 ? 0 : (uint64_t) s->latency_info.read_index, &s->sample_spec);
+
+ /* Because the latency info took a little time to come
+ * to us, we assume that the real output time is actually
+ * a little ahead */
+ usec += s->latency_info.transport_usec;
+
+ /* However, the output device usually maintains a buffer
+ too, hence the real sample currently played is a little
+ back */
+ if (s->latency_info.sink_usec >= usec)
usec = 0;
else
- usec -= latency;
-
+ usec -= s->latency_info.sink_usec;
+
} else if (s->direction == PA_STREAM_RECORD) {
- usec += i->source_usec + i->buffer_usec + i->transport_usec;
-
- if (usec > i->sink_usec)
- usec -= i->sink_usec;
- else
+ /* The last byte written into the server side queue had
+ * this time value associated */
+ usec = pa_bytes_to_usec(s->latency_info.write_index < 0 ? 0 : (uint64_t) s->latency_info.write_index, &s->sample_spec);
+
+ /* Add transport latency */
+ usec += s->latency_info.transport_usec;
+
+ /* Add latency of data in device buffer */
+ usec += s->latency_info.source_usec;
+
+ /* If this is a monitor source, we need to correct the
+ * time by the playback device buffer */
+ if (s->latency_info.sink_usec >= usec)
usec = 0;
+ else
+ usec -= s->latency_info.sink_usec;
+ }
+
+ if (s->flags & PA_STREAM_INTERPOLATE_LATENCY) {
+ s->ipol_usec_valid = 1;
+ s->ipol_usec = usec;
}
}
- if (usec < s->previous_time)
- usec = s->previous_time;
+ /* Interpolate if requested */
+ if (s->flags & PA_STREAM_INTERPOLATE_LATENCY) {
- s->previous_time = usec;
+ /* We just add the time that passed since the latency info was
+ * current */
+ if (!s->corked) {
+ struct timeval now;
+
+ usec += pa_timeval_diff(pa_gettimeofday(&now), &s->ipol_timestamp);
+ s->ipol_timestamp = now;
+ }
+ }
- return usec;
+ /* Make sure the time runs monotonically */
+ if (!(s->flags & PA_STREAM_NOT_MONOTONOUS)) {
+ if (usec < s->previous_time)
+ usec = s->previous_time;
+ else
+ s->previous_time = usec;
+ }
+
+ if (r_usec)
+ *r_usec = usec;
+
+ return 0;
}
-static pa_usec_t time_counter_diff(pa_stream *s, pa_usec_t t, pa_usec_t c, int *negative) {
+static pa_usec_t time_counter_diff(pa_stream *s, pa_usec_t a, pa_usec_t b, int *negative) {
assert(s);
assert(s->ref >= 1);
if (negative)
*negative = 0;
- if (c < t) {
- if (s->direction == PA_STREAM_RECORD) {
- if (negative)
- *negative = 1;
-
- return t-c;
+ if (a >= b)
+ return a-b;
+ else {
+ if (negative && s->direction == PA_STREAM_RECORD) {
+ *negative = 1;
+ return b-a;
} else
return 0;
- } else
- return c-t;
+ }
}
-pa_usec_t pa_stream_get_latency(pa_stream *s, const pa_latency_info *i, int *negative) {
+int pa_stream_get_latency(pa_stream *s, pa_usec_t *r_usec, int *negative) {
pa_usec_t t, c;
+ int r;
+ int64_t cindex;
assert(s);
assert(s->ref >= 1);
- assert(i);
+ assert(r_usec);
- PA_CHECK_VALIDITY_RETURN_ANY(s->context, s->state == PA_STREAM_READY, PA_ERR_BADSTATE, (pa_usec_t) -1);
- PA_CHECK_VALIDITY_RETURN_ANY(s->context, s->direction != PA_STREAM_UPLOAD, PA_ERR_BADSTATE, (pa_usec_t) -1);
+ PA_CHECK_VALIDITY(s->context, s->state == PA_STREAM_READY, PA_ERR_BADSTATE);
+ PA_CHECK_VALIDITY(s->context, s->direction != PA_STREAM_UPLOAD, PA_ERR_BADSTATE);
+ PA_CHECK_VALIDITY(s->context, s->latency_info_valid, PA_ERR_NODATA);
+ PA_CHECK_VALIDITY(s->context, s->direction != PA_STREAM_PLAYBACK || !s->latency_info.write_index_corrupt, PA_ERR_NODATA);
- t = pa_stream_get_time(s, i);
- c = pa_bytes_to_usec(s->counter, &s->sample_spec);
-
- return time_counter_diff(s, t, c, negative);
-}
+ if ((r = pa_stream_get_time(s, &t)) < 0)
+ return r;
-const pa_sample_spec* pa_stream_get_sample_spec(pa_stream *s) {
- assert(s);
- assert(s->ref >= 1);
+ if (s->direction == PA_STREAM_PLAYBACK)
+ cindex = s->latency_info.write_index;
+ else
+ cindex = s->latency_info.read_index;
- return &s->sample_spec;
-}
+ if (cindex < 0)
+ cindex = 0;
+
+ c = pa_bytes_to_usec(cindex, &s->sample_spec);
-const pa_channel_map* pa_stream_get_channel_map(pa_stream *s) {
- assert(s);
- assert(s->ref >= 1);
+ if (s->direction == PA_STREAM_PLAYBACK)
+ *r_usec = time_counter_diff(s, c, t, negative);
+ else
+ *r_usec = time_counter_diff(s, t, c, negative);
- return &s->channel_map;
+ return 0;
}
-void pa_stream_trash_ipol(pa_stream *s) {
+const pa_latency_info* pa_stream_get_latency_info(pa_stream *s) {
assert(s);
assert(s->ref >= 1);
- if (!s->interpolate)
- return;
+ PA_CHECK_VALIDITY_RETURN_NULL(s->context, s->state == PA_STREAM_READY, PA_ERR_BADSTATE);
+ PA_CHECK_VALIDITY_RETURN_NULL(s->context, s->direction != PA_STREAM_UPLOAD, PA_ERR_BADSTATE);
+ PA_CHECK_VALIDITY_RETURN_NULL(s->context, s->latency_info_valid, PA_ERR_BADSTATE);
- memset(&s->ipol_timestamp, 0, sizeof(s->ipol_timestamp));
- s->ipol_usec = 0;
+ return &s->latency_info;
}
-pa_usec_t pa_stream_get_interpolated_time(pa_stream *s) {
- pa_usec_t usec;
-
+const pa_sample_spec* pa_stream_get_sample_spec(pa_stream *s) {
assert(s);
assert(s->ref >= 1);
-
- PA_CHECK_VALIDITY_RETURN_ANY(s->context, s->state == PA_STREAM_READY, PA_ERR_BADSTATE, (pa_usec_t) -1);
- PA_CHECK_VALIDITY_RETURN_ANY(s->context, s->direction != PA_STREAM_UPLOAD, PA_ERR_BADSTATE, (pa_usec_t) -1);
- PA_CHECK_VALIDITY_RETURN_ANY(s->context, s->interpolate, PA_ERR_BADSTATE, (pa_usec_t) -1);
-
- if (s->corked)
- usec = s->ipol_usec;
- else {
- if (s->ipol_timestamp.tv_sec == 0)
- usec = 0;
- else
- usec = s->ipol_usec + pa_timeval_age(&s->ipol_timestamp);
- }
-
- if (usec < s->previous_ipol_time)
- usec = s->previous_ipol_time;
-
- s->previous_ipol_time = usec;
- return usec;
+ return &s->sample_spec;
}
-pa_usec_t pa_stream_get_interpolated_latency(pa_stream *s, int *negative) {
- pa_usec_t t, c;
-
+const pa_channel_map* pa_stream_get_channel_map(pa_stream *s) {
assert(s);
assert(s->ref >= 1);
- PA_CHECK_VALIDITY_RETURN_ANY(s->context, s->state == PA_STREAM_READY, PA_ERR_BADSTATE, (pa_usec_t) -1);
- PA_CHECK_VALIDITY_RETURN_ANY(s->context, s->direction != PA_STREAM_UPLOAD, PA_ERR_BADSTATE, (pa_usec_t) -1);
- PA_CHECK_VALIDITY_RETURN_ANY(s->context, s->interpolate, PA_ERR_BADSTATE, (pa_usec_t) -1);
-
- t = pa_stream_get_interpolated_time(s);
- c = pa_bytes_to_usec(s->counter, &s->sample_spec);
- return time_counter_diff(s, t, c, negative);
+ return &s->channel_map;
}
+
+
diff --git a/src/polyp/stream.h b/src/polyp/stream.h
index 75b0a900..99284ba3 100644
--- a/src/polyp/stream.h
+++ b/src/polyp/stream.h
@@ -51,9 +51,6 @@ typedef void (*pa_stream_request_cb_t)(pa_stream *p, size_t length, void *userda
/** A generic notification callback */
typedef void (*pa_stream_notify_cb_t)(pa_stream *p, void *userdata);
-/** Callback prototype for pa_stream_get_latency_info() */
-typedef void (*pa_stream_get_latency_info_cb_t)(pa_stream *p, const pa_latency_info *i, void *userdata);
-
/** Create a new, unconnected stream with the specified name and sample type */
pa_stream* pa_stream_new(
pa_context *c /**< The context to create this stream in */,
@@ -133,8 +130,8 @@ size_t pa_stream_readable_size(pa_stream *p);
/** Drain a playback stream. Use this for notification when the buffer is empty */
pa_operation* pa_stream_drain(pa_stream *s, pa_stream_success_cb_t cb, void *userdata);
-/** Get the playback latency of a stream */
-pa_operation* pa_stream_get_latency_info(pa_stream *p, pa_stream_get_latency_info_cb_t cby, void *userdata);
+/** Update the latency info of a stream */
+pa_operation* pa_stream_update_latency_info(pa_stream *p, pa_stream_success_cb_t cb, void *userdata);
/** Set the callback function that is called whenever the state of the stream changes */
void pa_stream_set_state_callback(pa_stream *s, pa_stream_notify_cb_t cb, void *userdata);
@@ -173,34 +170,21 @@ pa_operation* pa_stream_trigger(pa_stream *s, pa_stream_success_cb_t cb, void *u
/** Rename the stream. \since 0.5 */
pa_operation* pa_stream_set_name(pa_stream *s, const char *name, pa_stream_success_cb_t cb, void *userdata);
-/** Return the total number of bytes written to/read from the
- * stream. This counter is not reset on pa_stream_flush(), you may do
- * this yourself using pa_stream_reset_counter(). \since 0.6 */
-uint64_t pa_stream_get_counter(pa_stream *s);
-
/** Return the current playback/recording time. This is based on the
* counter accessible with pa_stream_get_counter(). This function
* requires a pa_latency_info structure as argument, which should be
* acquired using pa_stream_get_latency(). \since 0.6 */
-pa_usec_t pa_stream_get_time(pa_stream *s, const pa_latency_info *i);
+int pa_stream_get_time(pa_stream *s, pa_usec_t *r_usec);
/** Return the total stream latency. Thus function requires a
* pa_latency_info structure as argument, which should be aquired
* using pa_stream_get_latency(). In case the stream is a monitoring
* stream the result can be negative, i.e. the captured samples are
* not yet played. In this case *negative is set to 1. \since 0.6 */
-pa_usec_t pa_stream_get_latency(pa_stream *s, const pa_latency_info *i, int *negative);
-
-/** Return the interpolated playback/recording time. Requires the
- * PA_STREAM_INTERPOLATE_LATENCY bit set when creating the stream. In
- * contrast to pa_stream_get_latency() this function doesn't require
- * a whole roundtrip for response. \since 0.6 */
-pa_usec_t pa_stream_get_interpolated_time(pa_stream *s);
-
-/** Return the interpolated playback/recording latency. Requires the
- * PA_STREAM_INTERPOLATE_LATENCY bit set when creating the
- * stream. \since 0.6 */
-pa_usec_t pa_stream_get_interpolated_latency(pa_stream *s, int *negative);
+int pa_stream_get_latency(pa_stream *s, pa_usec_t *r_usec, int *negative);
+
+/** Return the latest latency data. \since 0.8 */
+const pa_latency_info* pa_stream_get_latency_info(pa_stream *s);
/** Return a pointer to the stream's sample specification. \since 0.6 */
const pa_sample_spec* pa_stream_get_sample_spec(pa_stream *s);