- Check process name when dealing with PID files

- Add new PA_STREAM_FIX_CHANNELS, FIX_RATE, FIX_FORMAT, DONT_MOVE, VARIABLE_RATES to pa_sream_flags_t adn implement it
- Expose those flags in pacat
- Add notifications about device suspend/resume to the protocol and expose them in libpulse
- Allow changing of buffer_attr during playback
- allow disabling for remixing globally
- hookup polkit support


git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@2067 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering 2007-11-21 01:30:40 +00:00
parent 4ac6b53478
commit 14a9b80afb
27 changed files with 1498 additions and 231 deletions

View file

@ -51,6 +51,7 @@ pa_stream *pa_stream_new(pa_context *c, const char *name, const pa_sample_spec *
pa_assert(PA_REFCNT_VALUE(c) >= 1);
PA_CHECK_VALIDITY_RETURN_NULL(c, ss && pa_sample_spec_valid(ss), PA_ERR_INVALID);
PA_CHECK_VALIDITY_RETURN_NULL(c, c->version >= 12 || (ss->format != PA_SAMPLE_S32LE || ss->format != PA_SAMPLE_S32NE), PA_ERR_NOTSUPPORTED);
PA_CHECK_VALIDITY_RETURN_NULL(c, !map || (pa_channel_map_valid(map) && map->channels == ss->channels), PA_ERR_INVALID);
s = pa_xnew(pa_stream, 1);
@ -58,6 +59,8 @@ pa_stream *pa_stream_new(pa_context *c, const char *name, const pa_sample_spec *
s->context = c;
s->mainloop = c->mainloop;
s->buffer_attr_not_ready = s->timing_info_not_ready = FALSE;
s->read_callback = NULL;
s->read_userdata = NULL;
s->write_callback = NULL;
@ -70,6 +73,10 @@ pa_stream *pa_stream_new(pa_context *c, const char *name, const pa_sample_spec *
s->underflow_userdata = NULL;
s->latency_update_callback = NULL;
s->latency_update_userdata = NULL;
s->moved_callback = NULL;
s->moved_userdata = NULL;
s->suspended_callback = NULL;
s->suspended_userdata = NULL;
s->direction = PA_STREAM_NODIRECTION;
s->name = pa_xstrdup(name);
@ -84,11 +91,17 @@ pa_stream *pa_stream_new(pa_context *c, const char *name, const pa_sample_spec *
s->channel = 0;
s->channel_valid = 0;
s->syncid = c->csyncid++;
s->device_index = PA_INVALID_INDEX;
s->stream_index = PA_INVALID_INDEX;
s->requested_bytes = 0;
s->state = PA_STREAM_UNCONNECTED;
s->manual_buffer_attr = FALSE;
memset(&s->buffer_attr, 0, sizeof(s->buffer_attr));
s->device_index = PA_INVALID_INDEX;
s->device_name = NULL;
s->suspended = FALSE;
s->peek_memchunk.index = 0;
s->peek_memchunk.length = 0;
s->peek_memchunk.memblock = NULL;
@ -139,6 +152,7 @@ static void stream_free(pa_stream *s) {
pa_memblockq_free(s->record_memblockq);
pa_xfree(s->name);
pa_xfree(s->device_name);
pa_xfree(s);
}
@ -178,7 +192,7 @@ uint32_t pa_stream_get_index(pa_stream *s) {
PA_CHECK_VALIDITY_RETURN_ANY(s->context, s->state == PA_STREAM_READY, PA_ERR_BADSTATE, PA_INVALID_INDEX);
return s->device_index;
return s->stream_index;
}
void pa_stream_set_state(pa_stream *s, pa_stream_state_t st) {
@ -262,6 +276,95 @@ finish:
pa_context_unref(c);
}
void pa_command_stream_moved(pa_pdispatch *pd, uint32_t command, PA_GCC_UNUSED uint32_t tag, pa_tagstruct *t, void *userdata) {
pa_context *c = userdata;
pa_stream *s;
uint32_t channel;
const char *dn;
int suspended;
uint32_t di;
pa_assert(pd);
pa_assert(command == PA_COMMAND_PLAYBACK_STREAM_MOVED || command == PA_COMMAND_RECORD_STREAM_MOVED);
pa_assert(t);
pa_assert(c);
pa_assert(PA_REFCNT_VALUE(c) >= 1);
pa_context_ref(c);
if (c->version < 12) {
pa_context_fail(c, PA_ERR_PROTOCOL);
goto finish;
}
if (pa_tagstruct_getu32(t, &channel) < 0 ||
pa_tagstruct_getu32(t, &di) < 0 ||
pa_tagstruct_gets(t, &dn) < 0 ||
pa_tagstruct_get_boolean(t, &suspended) < 0 ||
!pa_tagstruct_eof(t)) {
pa_context_fail(c, PA_ERR_PROTOCOL);
goto finish;
}
if (!dn || di == PA_INVALID_INDEX) {
pa_context_fail(c, PA_ERR_PROTOCOL);
goto finish;
}
if (!(s = pa_dynarray_get(command == PA_COMMAND_PLAYBACK_STREAM_MOVED ? c->playback_streams : c->record_streams, channel)))
goto finish;
pa_xfree(s->device_name);
s->device_name = pa_xstrdup(dn);
s->device_index = di;
s->suspended = suspended;
if (s->moved_callback)
s->moved_callback(s, s->moved_userdata);
finish:
pa_context_unref(c);
}
void pa_command_stream_suspended(pa_pdispatch *pd, uint32_t command, PA_GCC_UNUSED uint32_t tag, pa_tagstruct *t, void *userdata) {
pa_context *c = userdata;
pa_stream *s;
uint32_t channel;
int suspended;
pa_assert(pd);
pa_assert(command == PA_COMMAND_PLAYBACK_STREAM_SUSPENDED || command == PA_COMMAND_RECORD_STREAM_SUSPENDED);
pa_assert(t);
pa_assert(c);
pa_assert(PA_REFCNT_VALUE(c) >= 1);
pa_context_ref(c);
if (c->version < 12) {
pa_context_fail(c, PA_ERR_PROTOCOL);
goto finish;
}
if (pa_tagstruct_getu32(t, &channel) < 0 ||
pa_tagstruct_get_boolean(t, &suspended) < 0 ||
!pa_tagstruct_eof(t)) {
pa_context_fail(c, PA_ERR_PROTOCOL);
goto finish;
}
if (!(s = pa_dynarray_get(command == PA_COMMAND_PLAYBACK_STREAM_SUSPENDED ? c->playback_streams : c->record_streams, channel)))
goto finish;
s->suspended = suspended;
if (s->suspended_callback)
s->suspended_callback(s, s->suspended_userdata);
finish:
pa_context_unref(c);
}
void pa_command_request(pa_pdispatch *pd, uint32_t command, PA_GCC_UNUSED uint32_t tag, pa_tagstruct *t, void *userdata) {
pa_stream *s;
pa_context *c = userdata;
@ -412,6 +515,9 @@ static void create_stream_complete(pa_stream *s) {
pa_assert(PA_REFCNT_VALUE(s) >= 1);
pa_assert(s->state == PA_STREAM_CREATING);
if (s->buffer_attr_not_ready || s->timing_info_not_ready)
return;
pa_stream_set_state(s, PA_STREAM_READY);
if (s->requested_bytes > 0 && s->write_callback)
@ -426,6 +532,17 @@ static void create_stream_complete(pa_stream *s) {
}
}
static void automatic_buffer_attr(pa_buffer_attr *attr, pa_sample_spec *ss) {
pa_assert(attr);
pa_assert(ss);
attr->tlength = pa_bytes_per_second(ss)/2;
attr->maxlength = (attr->tlength*3)/2;
attr->minreq = attr->tlength/50;
attr->prebuf = attr->tlength - attr->minreq;
attr->fragsize = attr->tlength/50;
}
void pa_create_stream_callback(pa_pdispatch *pd, uint32_t command, PA_GCC_UNUSED uint32_t tag, pa_tagstruct *t, void *userdata) {
pa_stream *s = userdata;
@ -445,13 +562,13 @@ void pa_create_stream_callback(pa_pdispatch *pd, uint32_t command, PA_GCC_UNUSED
}
if (pa_tagstruct_getu32(t, &s->channel) < 0 ||
((s->direction != PA_STREAM_UPLOAD) && pa_tagstruct_getu32(t, &s->device_index) < 0) ||
((s->direction != PA_STREAM_UPLOAD) && pa_tagstruct_getu32(t, &s->stream_index) < 0) ||
((s->direction != PA_STREAM_RECORD) && pa_tagstruct_getu32(t, &s->requested_bytes) < 0)) {
pa_context_fail(s->context, PA_ERR_PROTOCOL);
goto finish;
}
if (pa_context_get_server_protocol_version(s->context) >= 9) {
if (s->context->version >= 9) {
if (s->direction == PA_STREAM_PLAYBACK) {
if (pa_tagstruct_getu32(t, &s->buffer_attr.maxlength) < 0 ||
pa_tagstruct_getu32(t, &s->buffer_attr.tlength) < 0 ||
@ -469,6 +586,58 @@ void pa_create_stream_callback(pa_pdispatch *pd, uint32_t command, PA_GCC_UNUSED
}
}
if (s->context->version >= 12) {
pa_sample_spec ss;
pa_channel_map cm;
const char *dn = NULL;
int suspended;
if (pa_tagstruct_get_sample_spec(t, &ss) < 0 ||
pa_tagstruct_get_channel_map(t, &cm) < 0 ||
pa_tagstruct_getu32(t, &s->device_index) < 0 ||
pa_tagstruct_gets(t, &dn) < 0 ||
pa_tagstruct_get_boolean(t, &suspended) < 0) {
pa_context_fail(s->context, PA_ERR_PROTOCOL);
goto finish;
}
if (!dn || s->device_index == PA_INVALID_INDEX ||
ss.channels != cm.channels ||
!pa_channel_map_valid(&cm) ||
!pa_sample_spec_valid(&ss) ||
(!(s->flags & PA_STREAM_FIX_FORMAT) && ss.format != s->sample_spec.format) ||
(!(s->flags & PA_STREAM_FIX_RATE) && ss.rate != s->sample_spec.rate) ||
(!(s->flags & PA_STREAM_FIX_CHANNELS) && !pa_channel_map_equal(&cm, &s->channel_map))) {
pa_context_fail(s->context, PA_ERR_PROTOCOL);
goto finish;
}
pa_xfree(s->device_name);
s->device_name = pa_xstrdup(dn);
s->suspended = suspended;
if (!s->manual_buffer_attr && pa_bytes_per_second(&ss) != pa_bytes_per_second(&s->sample_spec)) {
pa_buffer_attr attr;
pa_operation *o;
automatic_buffer_attr(&attr, &ss);
/* If we need to update the buffer metrics, we wait for
* the the OK for that call before we go to
* PA_STREAM_READY */
s->state = PA_STREAM_READY;
pa_assert_se(o = pa_stream_set_buffer_attr(s, &attr, NULL, NULL));
pa_operation_unref(o);
s->state = PA_STREAM_CREATING;
s->buffer_attr_not_ready = TRUE;
}
s->channel_map = cm;
s->sample_spec = ss;
}
if (!pa_tagstruct_eof(t)) {
pa_context_fail(s->context, PA_ERR_PROTOCOL);
goto finish;
@ -491,15 +660,19 @@ void pa_create_stream_callback(pa_pdispatch *pd, uint32_t command, PA_GCC_UNUSED
pa_dynarray_put((s->direction == PA_STREAM_RECORD) ? s->context->record_streams : s->context->playback_streams, s->channel, s);
if (s->direction != PA_STREAM_UPLOAD && s->flags & PA_STREAM_AUTO_TIMING_UPDATE) {
/* If automatic timing updates are active, we wait for the
* first timing update before going to PA_STREAM_READY
* state */
s->state = PA_STREAM_READY;
request_auto_timing_update(s, 1);
s->state = PA_STREAM_CREATING;
} else
create_stream_complete(s);
s->timing_info_not_ready = TRUE;
}
create_stream_complete(s);
finish:
pa_stream_unref(s);
@ -525,7 +698,13 @@ static int create_stream(
PA_STREAM_START_CORKED|
PA_STREAM_INTERPOLATE_TIMING|
PA_STREAM_NOT_MONOTONOUS|
PA_STREAM_AUTO_TIMING_UPDATE : 0))), PA_ERR_INVALID);
PA_STREAM_AUTO_TIMING_UPDATE|
PA_STREAM_NO_REMAP_CHANNELS|
PA_STREAM_NO_REMIX_CHANNELS|
PA_STREAM_FIX_FORMAT|
PA_STREAM_FIX_RATE|
PA_STREAM_FIX_CHANNELS|
PA_STREAM_DONT_MOVE : 0))), PA_ERR_INVALID);
PA_CHECK_VALIDITY(s->context, !volume || volume->channels == s->sample_spec.channels, PA_ERR_INVALID);
PA_CHECK_VALIDITY(s->context, !sync_stream || (direction == PA_STREAM_PLAYBACK && sync_stream->direction == PA_STREAM_PLAYBACK), PA_ERR_INVALID);
@ -537,15 +716,17 @@ static int create_stream(
if (sync_stream)
s->syncid = sync_stream->syncid;
if (attr)
if (attr) {
s->buffer_attr = *attr;
else {
s->manual_buffer_attr = TRUE;
} else {
/* half a second, with minimum request of 10 ms */
s->buffer_attr.tlength = pa_bytes_per_second(&s->sample_spec)/2;
s->buffer_attr.maxlength = (s->buffer_attr.tlength*3)/2;
s->buffer_attr.minreq = s->buffer_attr.tlength/50;
s->buffer_attr.prebuf = s->buffer_attr.tlength - s->buffer_attr.minreq;
s->buffer_attr.fragsize = s->buffer_attr.tlength/50;
s->manual_buffer_attr = FALSE;
}
if (!dev)
@ -585,6 +766,19 @@ static int create_stream(
} else
pa_tagstruct_putu32(t, s->buffer_attr.fragsize);
if (s->context->version >= 12 && s->direction != PA_STREAM_UPLOAD) {
pa_tagstruct_put(
t,
PA_TAG_BOOLEAN, flags & PA_STREAM_NO_REMAP_CHANNELS,
PA_TAG_BOOLEAN, flags & PA_STREAM_NO_REMIX_CHANNELS,
PA_TAG_BOOLEAN, flags & PA_STREAM_FIX_FORMAT,
PA_TAG_BOOLEAN, flags & PA_STREAM_FIX_RATE,
PA_TAG_BOOLEAN, flags & PA_STREAM_FIX_CHANNELS,
PA_TAG_BOOLEAN, flags & PA_STREAM_DONT_MOVE,
PA_TAG_BOOLEAN, flags & PA_STREAM_VARIABLE_RATE,
PA_TAG_INVALID);
}
pa_pstream_send_tagstruct(s->context->pstream, t);
pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, pa_create_stream_callback, s, NULL);
@ -921,8 +1115,10 @@ static void stream_get_timing_info_callback(pa_pdispatch *pd, uint32_t command,
}
/* First, let's complete the initialization, if necessary. */
if (o->stream->state == PA_STREAM_CREATING)
if (o->stream->state == PA_STREAM_CREATING) {
o->stream->timing_info_not_ready = FALSE;
create_stream_complete(o->stream);
}
if (o->stream->latency_update_callback)
o->stream->latency_update_callback(o->stream, o->stream->latency_update_userdata);
@ -1084,6 +1280,22 @@ void pa_stream_set_latency_update_callback(pa_stream *s, pa_stream_notify_cb_t c
s->latency_update_userdata = userdata;
}
void pa_stream_set_moved_callback(pa_stream *s, pa_stream_notify_cb_t cb, void *userdata) {
pa_assert(s);
pa_assert(PA_REFCNT_VALUE(s) >= 1);
s->moved_callback = cb;
s->moved_userdata = userdata;
}
void pa_stream_set_suspended_callback(pa_stream *s, pa_stream_notify_cb_t cb, void *userdata) {
pa_assert(s);
pa_assert(PA_REFCNT_VALUE(s) >= 1);
s->suspended_callback = cb;
s->suspended_userdata = userdata;
}
void pa_stream_simple_ack_callback(pa_pdispatch *pd, uint32_t command, PA_GCC_UNUSED uint32_t tag, pa_tagstruct *t, void *userdata) {
pa_operation *o = userdata;
int success = 1;
@ -1420,8 +1632,208 @@ const pa_buffer_attr* pa_stream_get_buffer_attr(pa_stream *s) {
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_context_get_server_protocol_version(s->context) >= 9, PA_ERR_NODATA);
PA_CHECK_VALIDITY_RETURN_NULL(s->context, s->context->version >= 9, PA_ERR_NODATA);
return &s->buffer_attr;
}
static void stream_set_buffer_attr_callback(pa_pdispatch *pd, uint32_t command, PA_GCC_UNUSED uint32_t tag, pa_tagstruct *t, void *userdata) {
pa_operation *o = userdata;
int success = 1;
pa_assert(pd);
pa_assert(o);
pa_assert(PA_REFCNT_VALUE(o) >= 1);
if (!o->context)
goto finish;
if (command != PA_COMMAND_REPLY) {
if (pa_context_handle_error(o->context, command, t) < 0)
goto finish;
success = 0;
} else {
if (o->stream->direction == PA_STREAM_PLAYBACK) {
if (pa_tagstruct_getu32(t, &o->stream->buffer_attr.maxlength) < 0 ||
pa_tagstruct_getu32(t, &o->stream->buffer_attr.tlength) < 0 ||
pa_tagstruct_getu32(t, &o->stream->buffer_attr.prebuf) < 0 ||
pa_tagstruct_getu32(t, &o->stream->buffer_attr.minreq) < 0) {
pa_context_fail(o->context, PA_ERR_PROTOCOL);
goto finish;
}
} else if (o->stream->direction == PA_STREAM_RECORD) {
if (pa_tagstruct_getu32(t, &o->stream->buffer_attr.maxlength) < 0 ||
pa_tagstruct_getu32(t, &o->stream->buffer_attr.fragsize) < 0) {
pa_context_fail(o->context, PA_ERR_PROTOCOL);
goto finish;
}
}
if (!pa_tagstruct_eof(t)) {
pa_context_fail(o->context, PA_ERR_PROTOCOL);
goto finish;
}
o->stream->manual_buffer_attr = TRUE;
}
if (o->stream->state == PA_STREAM_CREATING) {
o->stream->buffer_attr_not_ready = FALSE;
create_stream_complete(o->stream);
}
if (o->callback) {
pa_stream_success_cb_t cb = (pa_stream_success_cb_t) o->callback;
cb(o->stream, success, o->userdata);
}
finish:
pa_operation_done(o);
pa_operation_unref(o);
}
pa_operation* pa_stream_set_buffer_attr(pa_stream *s, const pa_buffer_attr *attr, pa_stream_success_cb_t cb, void *userdata) {
pa_operation *o;
pa_tagstruct *t;
uint32_t tag;
pa_assert(s);
pa_assert(PA_REFCNT_VALUE(s) >= 1);
pa_assert(attr);
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->context->version >= 12, PA_ERR_NOTSUPPORTED);
o = pa_operation_new(s->context, s, (pa_operation_cb_t) cb, userdata);
t = pa_tagstruct_command(
s->context,
s->direction == PA_STREAM_RECORD ? PA_COMMAND_SET_RECORD_STREAM_BUFFER_ATTR : PA_COMMAND_SET_PLAYBACK_STREAM_BUFFER_ATTR,
&tag);
pa_tagstruct_putu32(t, s->channel);
pa_tagstruct_putu32(t, attr->maxlength);
if (s->direction == PA_STREAM_PLAYBACK)
pa_tagstruct_put(
t,
PA_TAG_U32, attr->tlength,
PA_TAG_U32, attr->prebuf,
PA_TAG_U32, attr->minreq,
PA_TAG_INVALID);
else
pa_tagstruct_putu32(t, attr->fragsize);
pa_pstream_send_tagstruct(s->context->pstream, t);
pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, stream_set_buffer_attr_callback, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref);
return o;
}
uint32_t pa_stream_get_device_index(pa_stream *s) {
pa_assert(s);
pa_assert(PA_REFCNT_VALUE(s) >= 1);
PA_CHECK_VALIDITY_RETURN_ANY(s->context, s->state == PA_STREAM_READY, PA_ERR_BADSTATE, PA_INVALID_INDEX);
PA_CHECK_VALIDITY_RETURN_ANY(s->context, s->direction != PA_STREAM_UPLOAD, PA_ERR_BADSTATE, PA_INVALID_INDEX);
PA_CHECK_VALIDITY_RETURN_ANY(s->context, s->context->version >= 12, PA_ERR_NOTSUPPORTED, PA_INVALID_INDEX);
PA_CHECK_VALIDITY_RETURN_ANY(s->context, s->device_index != PA_INVALID_INDEX, PA_ERR_BADSTATE, PA_INVALID_INDEX);
return s->device_index;
}
const char *pa_stream_get_device_name(pa_stream *s) {
pa_assert(s);
pa_assert(PA_REFCNT_VALUE(s) >= 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, s->context->version >= 12, PA_ERR_NOTSUPPORTED);
PA_CHECK_VALIDITY_RETURN_NULL(s->context, s->device_name, PA_ERR_BADSTATE);
return s->device_name;
}
int pa_stream_is_suspended(pa_stream *s) {
pa_assert(s);
pa_assert(PA_REFCNT_VALUE(s) >= 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->context->version >= 12, PA_ERR_NOTSUPPORTED);
return s->suspended;
}
static void stream_update_sample_rate_callback(pa_pdispatch *pd, uint32_t command, PA_GCC_UNUSED uint32_t tag, pa_tagstruct *t, void *userdata) {
pa_operation *o = userdata;
int success = 1;
pa_assert(pd);
pa_assert(o);
pa_assert(PA_REFCNT_VALUE(o) >= 1);
if (!o->context)
goto finish;
if (command != PA_COMMAND_REPLY) {
if (pa_context_handle_error(o->context, command, t) < 0)
goto finish;
success = 0;
} else {
if (!pa_tagstruct_eof(t)) {
pa_context_fail(o->context, PA_ERR_PROTOCOL);
goto finish;
}
}
o->stream->sample_spec.rate = PA_PTR_TO_UINT(o->private);
pa_assert(pa_sample_spec_valid(&o->stream->sample_spec));
if (o->callback) {
pa_stream_success_cb_t cb = (pa_stream_success_cb_t) o->callback;
cb(o->stream, success, o->userdata);
}
finish:
pa_operation_done(o);
pa_operation_unref(o);
}
pa_operation *pa_stream_update_sample_rate(pa_stream *s, uint32_t rate, pa_stream_success_cb_t cb, void *userdata) {
pa_operation *o;
pa_tagstruct *t;
uint32_t tag;
pa_assert(s);
pa_assert(PA_REFCNT_VALUE(s) >= 1);
PA_CHECK_VALIDITY_RETURN_NULL(s->context, rate > 0 && rate <= PA_RATE_MAX, PA_ERR_INVALID);
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->flags & PA_STREAM_VARIABLE_RATE, PA_ERR_BADSTATE);
PA_CHECK_VALIDITY_RETURN_NULL(s->context, s->context->version >= 12, PA_ERR_NOTSUPPORTED);
o = pa_operation_new(s->context, s, (pa_operation_cb_t) cb, userdata);
o->private = PA_UINT_TO_PTR(rate);
t = pa_tagstruct_command(
s->context,
s->direction == PA_STREAM_RECORD ? PA_COMMAND_UPDATE_RECORD_STREAM_SAMPLE_RATE : PA_COMMAND_UPDATE_PLAYBACK_STREAM_SAMPLE_RATE,
&tag);
pa_tagstruct_putu32(t, s->channel);
pa_tagstruct_putu32(t, rate);
pa_pstream_send_tagstruct(s->context->pstream, t);
pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, stream_update_sample_rate_callback, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref);
return o;
}