drop polyplib- prefix from client library files

git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@492 fefdeb5f-60dc-0310-8127-8f9354f1896f

1 files changed, 807 insertions, 0 deletions

diff --git a/src/polyp/stream.c b/src/polyp/stream.c
new file mode 100644
index 00000000..007d5e24
--- /dev/null
+++ b/src/polyp/stream.c
@@ -0,0 +1,807 @@
+/* $Id$ */
+
+/***
+  This file is part of polypaudio.
+ 
+  polypaudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as published
+  by the Free Software Foundation; either version 2 of the License,
+  or (at your option) any later version.
+ 
+  polypaudio is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+ 
+  You should have received a copy of the GNU Lesser General Public License
+  along with polypaudio; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+  USA.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <assert.h>
+#include <string.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "internal.h"
+#include <polypcore/xmalloc.h>
+#include <polypcore/pstream-util.h>
+#include <polypcore/util.h>
+#include <polypcore/log.h>
+
+#define LATENCY_IPOL_INTERVAL_USEC (10000L)
+
+pa_stream *pa_stream_new(pa_context *c, const char *name, const pa_sample_spec *ss, const pa_channel_map *map) {
+    pa_stream *s;
+    assert(c);
+    assert(ss);
+
+    if (!pa_sample_spec_valid(ss))
+        return NULL;
+
+    if (map && !pa_channel_map_valid(map))
+        return NULL;
+
+    s = pa_xnew(pa_stream, 1);
+    s->ref = 1;
+    s->context = c;
+    s->mainloop = c->mainloop;
+
+    s->read_callback = NULL;
+    s->read_userdata = NULL;
+    s->write_callback = NULL;
+    s->write_userdata = NULL;
+    s->state_callback = NULL;
+    s->state_userdata = NULL;
+
+    s->direction = PA_STREAM_NODIRECTION;
+    s->name = pa_xstrdup(name);
+    s->sample_spec = *ss;
+
+    if (map)
+        s->channel_map = *map;
+    else
+        pa_channel_map_init_auto(&s->channel_map, ss->channels);
+    
+    s->channel = 0;
+    s->channel_valid = 0;
+    s->device_index = PA_INVALID_INDEX;
+    s->requested_bytes = 0;
+    s->state = PA_STREAM_DISCONNECTED;
+    memset(&s->buffer_attr, 0, sizeof(s->buffer_attr));
+
+    s->mcalign = pa_mcalign_new(pa_frame_size(ss), c->memblock_stat);
+
+    s->counter = 0;
+    s->previous_time = 0;
+    s->previous_ipol_time = 0;
+
+    s->corked = 0;
+    s->interpolate = 0;
+
+    s->ipol_usec = 0;
+    memset(&s->ipol_timestamp, 0, sizeof(s->ipol_timestamp));
+    s->ipol_event = NULL;
+    s->ipol_requested = 0;
+
+    PA_LLIST_PREPEND(pa_stream, c->streams, s);
+
+    return pa_stream_ref(s);
+}
+
+static void stream_free(pa_stream *s) {
+    assert(s);
+
+    if (s->ipol_event) {
+        assert(s->mainloop);
+        s->mainloop->time_free(s->ipol_event);
+    }
+
+    pa_mcalign_free(s->mcalign);
+    
+    pa_xfree(s->name);
+    pa_xfree(s);
+}
+
+void pa_stream_unref(pa_stream *s) {
+    assert(s && s->ref >= 1);
+
+    if (--(s->ref) == 0)
+        stream_free(s);
+}
+
+pa_stream* pa_stream_ref(pa_stream *s) {
+    assert(s && s->ref >= 1);
+    s->ref++;
+    return s;
+}
+
+pa_stream_state_t pa_stream_get_state(pa_stream *s) {
+    assert(s && s->ref >= 1);
+    return s->state;
+}
+
+pa_context* pa_stream_get_context(pa_stream *s) {
+    assert(s && s->ref >= 1);
+    return s->context;
+}
+
+uint32_t pa_stream_get_index(pa_stream *s) {
+    assert(s && s->ref >= 1);
+    return s->device_index;
+}
+    
+void pa_stream_set_state(pa_stream *s, pa_stream_state_t st) {
+    assert(s && s->ref >= 1);
+
+    if (s->state == st)
+        return;
+    
+    pa_stream_ref(s);
+
+    s->state = st;
+    
+    if ((st == PA_STREAM_FAILED || st == PA_STREAM_TERMINATED) && s->context) {
+        if (s->channel_valid)
+            pa_dynarray_put((s->direction == PA_STREAM_PLAYBACK) ? s->context->playback_streams : s->context->record_streams, s->channel, NULL);
+
+        PA_LLIST_REMOVE(pa_stream, s->context->streams, s);
+        pa_stream_unref(s);
+    }
+
+    if (s->state_callback)
+        s->state_callback(s, s->state_userdata);
+
+    pa_stream_unref(s);
+}
+
+void pa_command_stream_killed(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;
+    assert(pd && (command == PA_COMMAND_PLAYBACK_STREAM_KILLED || command == PA_COMMAND_RECORD_STREAM_KILLED) && t && c);
+
+    pa_context_ref(c);
+    
+    if (pa_tagstruct_getu32(t, &channel) < 0 ||
+        !pa_tagstruct_eof(t)) {
+        pa_context_fail(c, PA_ERROR_PROTOCOL);
+        goto finish;
+    }
+    
+    if (!(s = pa_dynarray_get(command == PA_COMMAND_PLAYBACK_STREAM_KILLED ? c->playback_streams : c->record_streams, channel)))
+        goto finish;
+
+    c->error = PA_ERROR_KILLED;
+    pa_stream_set_state(s, PA_STREAM_FAILED);
+
+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;
+    uint32_t bytes, channel;
+    assert(pd && command == PA_COMMAND_REQUEST && t && c);
+
+    pa_context_ref(c);
+    
+    if (pa_tagstruct_getu32(t, &channel) < 0 ||
+        pa_tagstruct_getu32(t, &bytes) < 0 ||
+        !pa_tagstruct_eof(t)) {
+        pa_context_fail(c, PA_ERROR_PROTOCOL);
+        goto finish;
+    }
+    
+    if (!(s = pa_dynarray_get(c->playback_streams, channel)))
+        goto finish;
+
+    if (s->state != PA_STREAM_READY)
+        goto finish;
+
+    pa_stream_ref(s);
+    
+    s->requested_bytes += bytes;
+
+    if (s->requested_bytes && s->write_callback)
+        s->write_callback(s, s->requested_bytes, s->write_userdata);
+
+    pa_stream_unref(s);
+
+finish:
+    pa_context_unref(c);
+}
+
+static void ipol_callback(pa_mainloop_api *m, pa_time_event *e, PA_GCC_UNUSED const struct timeval *tv, void *userdata) {
+    struct timeval tv2;
+    pa_stream *s = userdata;
+
+    pa_stream_ref(s);
+
+/*     pa_log("requesting new ipol data\n"); */
+    
+    if (s->state == PA_STREAM_READY && !s->ipol_requested) {
+        pa_operation_unref(pa_stream_get_latency_info(s, NULL, NULL));
+        s->ipol_requested = 1;
+    }
+    
+    pa_gettimeofday(&tv2);
+    pa_timeval_add(&tv2, LATENCY_IPOL_INTERVAL_USEC);
+    
+    m->time_restart(e, &tv2);
+    
+    pa_stream_unref(s);
+}
+
+
+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;
+    assert(pd && s && s->state == PA_STREAM_CREATING);
+
+    pa_stream_ref(s);
+    
+    if (command != PA_COMMAND_REPLY) {
+        if (pa_context_handle_error(s->context, command, t) < 0)
+            goto finish;
+        
+        pa_stream_set_state(s, PA_STREAM_FAILED);
+        goto finish;
+    }
+
+    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_RECORD) && pa_tagstruct_getu32(t, &s->requested_bytes) < 0) ||
+        !pa_tagstruct_eof(t)) {
+        pa_context_fail(s->context, PA_ERROR_PROTOCOL);
+        goto finish;
+    }
+
+    s->channel_valid = 1;
+    pa_dynarray_put((s->direction == PA_STREAM_RECORD) ? s->context->record_streams : s->context->playback_streams, s->channel, s);
+    pa_stream_set_state(s, PA_STREAM_READY);
+
+    if (s->interpolate) {
+        struct timeval tv;
+        pa_operation_unref(pa_stream_get_latency_info(s, NULL, NULL));
+
+        pa_gettimeofday(&tv);
+        tv.tv_usec += LATENCY_IPOL_INTERVAL_USEC; /* every 100 ms */
+
+        assert(!s->ipol_event);
+        s->ipol_event = s->mainloop->time_new(s->mainloop, &tv, &ipol_callback, s);
+    }
+
+    if (s->requested_bytes && s->ref > 1 && s->write_callback)
+        s->write_callback(s, s->requested_bytes, s->write_userdata);
+
+finish:
+    pa_stream_unref(s);
+}
+
+static void create_stream(pa_stream *s, const char *dev, const pa_buffer_attr *attr, pa_stream_flags_t flags, const pa_cvolume *volume) {
+    pa_tagstruct *t;
+    uint32_t tag;
+    assert(s && s->ref >= 1 && s->state == PA_STREAM_DISCONNECTED);
+
+    pa_stream_ref(s);
+
+    s->interpolate = !!(flags & PA_STREAM_INTERPOLATE_LATENCY);
+    pa_stream_trash_ipol(s);
+    
+    if (attr)
+        s->buffer_attr = *attr;
+    else {
+        /* half a second */
+        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/100;
+        s->buffer_attr.prebuf = s->buffer_attr.tlength - s->buffer_attr.minreq;
+        s->buffer_attr.fragsize = s->buffer_attr.tlength/100;
+    }
+
+    pa_stream_set_state(s, PA_STREAM_CREATING);
+    
+    t = pa_tagstruct_new(NULL, 0);
+    assert(t);
+
+    if (!dev) {
+        if (s->direction == PA_STREAM_PLAYBACK)
+            dev = s->context->conf->default_sink;
+        else
+            dev = s->context->conf->default_source;
+    }
+    
+    pa_tagstruct_put(t,
+        PA_TAG_U32, s->direction == PA_STREAM_PLAYBACK ? PA_COMMAND_CREATE_PLAYBACK_STREAM : PA_COMMAND_CREATE_RECORD_STREAM,
+        PA_TAG_U32, tag = s->context->ctag++,
+        PA_TAG_STRING, s->name,
+        PA_TAG_SAMPLE_SPEC, &s->sample_spec,
+        PA_TAG_CHANNEL_MAP, &s->channel_map,
+        PA_TAG_U32, PA_INVALID_INDEX,
+        PA_TAG_STRING, dev,
+        PA_TAG_U32, s->buffer_attr.maxlength,
+        PA_TAG_BOOLEAN, !!(flags & PA_STREAM_START_CORKED),
+        PA_TAG_INVALID);
+    
+    if (s->direction == PA_STREAM_PLAYBACK) {
+        pa_cvolume cv;
+        pa_tagstruct_put(t,
+            PA_TAG_U32, s->buffer_attr.tlength,
+            PA_TAG_U32, s->buffer_attr.prebuf,
+            PA_TAG_U32, s->buffer_attr.minreq,
+            PA_TAG_INVALID);
+
+        if (!volume) {
+            pa_cvolume_reset(&cv, s->sample_spec.channels);
+            volume = &cv;
+        }
+        
+        pa_tagstruct_put_cvolume(t, volume);
+    } else
+        pa_tagstruct_putu32(t, s->buffer_attr.fragsize);
+
+    pa_pstream_send_tagstruct(s->context->pstream, t);
+    pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, pa_create_stream_callback, s);
+
+    pa_stream_unref(s);
+}
+
+void pa_stream_connect_playback(pa_stream *s, const char *dev, const pa_buffer_attr *attr, pa_stream_flags_t flags, pa_cvolume *volume) {
+    assert(s && s->context->state == PA_CONTEXT_READY && s->ref >= 1);
+    s->direction = PA_STREAM_PLAYBACK;
+    create_stream(s, dev, attr, flags, volume);
+}
+
+void pa_stream_connect_record(pa_stream *s, const char *dev, const pa_buffer_attr *attr, pa_stream_flags_t flags) {
+    assert(s && s->context->state == PA_CONTEXT_READY && s->ref >= 1);
+    s->direction = PA_STREAM_RECORD;
+    create_stream(s, dev, attr, flags, 0);
+}
+
+void pa_stream_write(pa_stream *s, const void *data, size_t length, void (*free_cb)(void *p), size_t delta) {
+    pa_memchunk chunk;
+    assert(s && s->context && data && length && s->state == PA_STREAM_READY && s->ref >= 1);
+
+    if (free_cb) {
+        chunk.memblock = pa_memblock_new_user((void*) data, length, free_cb, 1, s->context->memblock_stat);
+        assert(chunk.memblock && chunk.memblock->data);
+    } else {
+        chunk.memblock = pa_memblock_new(length, s->context->memblock_stat);
+        assert(chunk.memblock && chunk.memblock->data);
+        memcpy(chunk.memblock->data, data, length);
+    }
+    chunk.index = 0;
+    chunk.length = length;
+
+    pa_pstream_send_memblock(s->context->pstream, s->channel, delta, &chunk);
+    pa_memblock_unref(chunk.memblock);
+    
+    if (length < s->requested_bytes)
+        s->requested_bytes -= length;
+    else
+        s->requested_bytes = 0;
+
+    s->counter += length;
+}
+
+size_t pa_stream_writable_size(pa_stream *s) {
+    assert(s && s->ref >= 1);
+    return s->state == PA_STREAM_READY ? s->requested_bytes : 0;
+}
+
+pa_operation * pa_stream_drain(pa_stream *s, void (*cb) (pa_stream*s, int success, void *userdata), void *userdata) {
+    pa_operation *o;
+    pa_tagstruct *t;
+    uint32_t tag;
+    assert(s && s->ref >= 1 && s->state == PA_STREAM_READY);
+
+    o = pa_operation_new(s->context, s);
+    assert(o);
+    o->callback = (pa_operation_callback) cb;
+    o->userdata = userdata;
+
+    t = pa_tagstruct_new(NULL, 0);
+    assert(t);
+    pa_tagstruct_putu32(t, PA_COMMAND_DRAIN_PLAYBACK_STREAM);
+    pa_tagstruct_putu32(t, tag = s->context->ctag++);
+    pa_tagstruct_putu32(t, s->channel);
+    pa_pstream_send_tagstruct(s->context->pstream, t);
+    pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, pa_stream_simple_ack_callback, o);
+
+    return pa_operation_ref(o);
+}
+
+static void stream_get_latency_info_callback(pa_pdispatch *pd, uint32_t command, PA_GCC_UNUSED uint32_t tag, pa_tagstruct *t, void *userdata) {
+    pa_operation *o = userdata;
+    pa_latency_info i, *p = NULL;
+    struct timeval local, remote, now;
+    assert(pd && o && o->stream && o->context);
+
+    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 ||
+               pa_tagstruct_get_timeval(t, &local) < 0 ||
+               pa_tagstruct_get_timeval(t, &remote) < 0 ||
+               pa_tagstruct_getu64(t, &i.counter) < 0 ||
+               !pa_tagstruct_eof(t)) {
+        pa_context_fail(o->context, PA_ERROR_PROTOCOL);
+        goto finish;
+    } else {
+        pa_gettimeofday(&now);
+        
+        if (pa_timeval_cmp(&local, &remote) <= 0 && pa_timeval_cmp(&remote, &now) <= 0) {
+            /* local and remote seem to have synchronized clocks */
+            
+            if (o->stream->direction == PA_STREAM_PLAYBACK)
+                i.transport_usec = pa_timeval_diff(&remote, &local);
+            else
+                i.transport_usec = pa_timeval_diff(&now, &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);
+        }
+        
+        if (o->stream->interpolate) {
+/*              pa_log("new interpol data\n");  */
+            o->stream->ipol_timestamp = i.timestamp;
+            o->stream->ipol_usec = pa_stream_get_time(o->stream, &i);
+            o->stream->ipol_requested = 0;
+        }
+
+        p = &i;
+    }
+    
+    if (o->callback) {
+        void (*cb)(pa_stream *s, const pa_latency_info *_i, void *_userdata) = (void (*)(pa_stream *s, const pa_latency_info *_i, void *_userdata)) o->callback;
+        cb(o->stream, p, o->userdata);
+    }
+
+finish:
+    pa_operation_done(o);
+    pa_operation_unref(o);
+}
+
+pa_operation* pa_stream_get_latency_info(pa_stream *s, void (*cb)(pa_stream *p, const pa_latency_info*i, void *userdata), void *userdata) {
+    uint32_t tag;
+    pa_operation *o;
+    pa_tagstruct *t;
+    struct timeval now;
+    assert(s && s->direction != PA_STREAM_UPLOAD);
+
+    o = pa_operation_new(s->context, s);
+    assert(o);
+    o->callback = (pa_operation_callback) cb;
+    o->userdata = userdata;
+
+    t = pa_tagstruct_new(NULL, 0);
+    assert(t);
+    pa_tagstruct_putu32(t, s->direction == PA_STREAM_PLAYBACK ? PA_COMMAND_GET_PLAYBACK_LATENCY : PA_COMMAND_GET_RECORD_LATENCY);
+    pa_tagstruct_putu32(t, tag = s->context->ctag++);
+    pa_tagstruct_putu32(t, s->channel);
+
+    pa_gettimeofday(&now);
+    pa_tagstruct_put_timeval(t, &now);
+    pa_tagstruct_putu64(t, s->counter);
+    
+    pa_pstream_send_tagstruct(s->context->pstream, t);
+    pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, stream_get_latency_info_callback, o);
+
+    return pa_operation_ref(o);
+}
+
+void pa_stream_disconnect_callback(pa_pdispatch *pd, uint32_t command, PA_GCC_UNUSED uint32_t tag, pa_tagstruct *t, void *userdata) {
+    pa_stream *s = userdata;
+    assert(pd && s && s->ref >= 1);
+
+    pa_stream_ref(s);
+
+    if (command != PA_COMMAND_REPLY) {
+        if (pa_context_handle_error(s->context, command, t) < 0)
+            goto finish;
+
+        pa_stream_set_state(s, PA_STREAM_FAILED);
+        goto finish;
+    } else if (!pa_tagstruct_eof(t)) {
+        pa_context_fail(s->context, PA_ERROR_PROTOCOL);
+        goto finish;
+    }
+
+    pa_stream_set_state(s, PA_STREAM_TERMINATED);
+
+finish:
+    pa_stream_unref(s);
+}
+
+void pa_stream_disconnect(pa_stream *s) {
+    pa_tagstruct *t;
+    uint32_t tag;
+    assert(s && s->ref >= 1);
+    
+    if (!s->channel_valid || !s->context->state == PA_CONTEXT_READY)
+        return;
+
+    pa_stream_ref(s);
+
+    t = pa_tagstruct_new(NULL, 0);
+    assert(t);
+    
+    pa_tagstruct_putu32(t, s->direction == PA_STREAM_PLAYBACK ? PA_COMMAND_DELETE_PLAYBACK_STREAM :
+                        (s->direction == PA_STREAM_RECORD ? PA_COMMAND_DELETE_RECORD_STREAM : PA_COMMAND_DELETE_UPLOAD_STREAM));
+    pa_tagstruct_putu32(t, tag = s->context->ctag++);
+    pa_tagstruct_putu32(t, s->channel);
+    pa_pstream_send_tagstruct(s->context->pstream, t);
+    pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, pa_stream_disconnect_callback, s);
+
+    pa_stream_unref(s);
+}
+
+void pa_stream_set_read_callback(pa_stream *s, void (*cb)(pa_stream *p, const void*data, size_t length, void *userdata), void *userdata) {
+    assert(s && s->ref >= 1);
+    s->read_callback = cb;
+    s->read_userdata = userdata;
+}
+
+void pa_stream_set_write_callback(pa_stream *s, void (*cb)(pa_stream *p, size_t length, void *userdata), void *userdata) {
+    assert(s && s->ref >= 1);
+    s->write_callback = cb;
+    s->write_userdata = userdata;
+}
+
+void pa_stream_set_state_callback(pa_stream *s, void (*cb)(pa_stream *s, void *userdata), void *userdata) {
+    assert(s && s->ref >= 1);
+    s->state_callback = cb;
+    s->state_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;
+    assert(pd && o && o->context && o->ref >= 1);
+
+    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_ERROR_PROTOCOL);
+        goto finish;
+    }
+
+    if (o->callback) {
+        void (*cb)(pa_stream *s, int _success, void *_userdata) = (void (*)(pa_stream *s, int _success, void *_userdata)) o->callback;
+        cb(o->stream, success, o->userdata);
+    }
+
+finish:
+    pa_operation_done(o);
+    pa_operation_unref(o);
+}
+
+pa_operation* pa_stream_cork(pa_stream *s, int b, void (*cb) (pa_stream*s, int success, void *userdata), void *userdata) {
+    pa_operation *o;
+    pa_tagstruct *t;
+    uint32_t tag;
+    assert(s && s->ref >= 1 && s->state == PA_STREAM_READY);
+
+    if (s->interpolate) {
+        if (!s->corked && b)
+            /* Pausing */
+            s->ipol_usec = pa_stream_get_interpolated_time(s);
+        else if (s->corked && !b)
+            /* Unpausing */
+            pa_gettimeofday(&s->ipol_timestamp);
+    }
+
+    s->corked = b;
+    
+    o = pa_operation_new(s->context, s);
+    assert(o);
+    o->callback = (pa_operation_callback) cb;
+    o->userdata = userdata;
+
+    t = pa_tagstruct_new(NULL, 0);
+    assert(t);
+    pa_tagstruct_putu32(t, s->direction == PA_STREAM_PLAYBACK ? PA_COMMAND_CORK_PLAYBACK_STREAM : PA_COMMAND_CORK_RECORD_STREAM);
+    pa_tagstruct_putu32(t, tag = s->context->ctag++);
+    pa_tagstruct_putu32(t, s->channel);
+    pa_tagstruct_put_boolean(t, !!b);
+    pa_pstream_send_tagstruct(s->context->pstream, t);
+    pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, pa_stream_simple_ack_callback, o);
+
+    pa_operation_unref(pa_stream_get_latency_info(s, NULL, NULL));
+    
+    return pa_operation_ref(o);
+}
+
+static pa_operation* stream_send_simple_command(pa_stream *s, uint32_t command, void (*cb)(pa_stream *s, int success, void *userdata), void *userdata) {
+    pa_tagstruct *t;
+    pa_operation *o;
+    uint32_t tag;
+    assert(s && s->ref >= 1 && s->state == PA_STREAM_READY);
+    
+    o = pa_operation_new(s->context, s);
+    o->callback = (pa_operation_callback) cb;
+    o->userdata = userdata;
+
+    t = pa_tagstruct_new(NULL, 0);
+    pa_tagstruct_putu32(t, command);
+    pa_tagstruct_putu32(t, tag = s->context->ctag++);
+    pa_tagstruct_putu32(t, s->channel);
+    pa_pstream_send_tagstruct(s->context->pstream, t);
+    pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, pa_stream_simple_ack_callback, o);
+
+    return pa_operation_ref(o);
+}
+
+pa_operation* pa_stream_flush(pa_stream *s, void (*cb)(pa_stream *s, int success, void *userdata), void *userdata) {
+    pa_operation *o;
+    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_unref(pa_stream_get_latency_info(s, NULL, NULL));
+    return o;
+}
+
+pa_operation* pa_stream_prebuf(pa_stream *s, void (*cb)(pa_stream *s, int success, void *userdata), void *userdata) {
+    pa_operation *o;
+    o = stream_send_simple_command(s, PA_COMMAND_PREBUF_PLAYBACK_STREAM, cb, userdata);
+    pa_operation_unref(pa_stream_get_latency_info(s, NULL, NULL));
+    return o;
+}
+
+pa_operation* pa_stream_trigger(pa_stream *s, void (*cb)(pa_stream *s, int success, void *userdata), void *userdata) {
+    pa_operation *o;
+    o = stream_send_simple_command(s, PA_COMMAND_TRIGGER_PLAYBACK_STREAM, cb, userdata);
+    pa_operation_unref(pa_stream_get_latency_info(s, NULL, NULL));
+    return o;
+}
+
+pa_operation* pa_stream_set_name(pa_stream *s, const char *name, void(*cb)(pa_stream*c, int success,  void *userdata), void *userdata) {
+    pa_operation *o;
+    pa_tagstruct *t;
+    uint32_t tag;
+    assert(s && s->ref >= 1 && s->state == PA_STREAM_READY && name && s->direction != PA_STREAM_UPLOAD);
+
+    o = pa_operation_new(s->context, s);
+    assert(o);
+    o->callback = (pa_operation_callback) cb;
+    o->userdata = userdata;
+
+    t = pa_tagstruct_new(NULL, 0);
+    assert(t);
+    pa_tagstruct_putu32(t, s->direction == PA_STREAM_RECORD ? PA_COMMAND_SET_RECORD_STREAM_NAME : PA_COMMAND_SET_PLAYBACK_STREAM_NAME);
+    pa_tagstruct_putu32(t, tag = s->context->ctag++);
+    pa_tagstruct_putu32(t, s->channel);
+    pa_tagstruct_puts(t, name);
+    pa_pstream_send_tagstruct(s->context->pstream, t);
+    pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, pa_stream_simple_ack_callback, o);
+
+    return pa_operation_ref(o);
+}
+
+uint64_t pa_stream_get_counter(pa_stream *s) {
+    assert(s);
+    return s->counter;
+}
+
+pa_usec_t pa_stream_get_time(pa_stream *s, const pa_latency_info *i) {
+    pa_usec_t usec;
+    assert(s);
+    
+    usec = pa_bytes_to_usec(i->counter, &s->sample_spec);
+
+    if (i) {
+        if (s->direction == PA_STREAM_PLAYBACK) {
+            pa_usec_t latency = i->transport_usec + i->buffer_usec + i->sink_usec;
+            if (usec < latency)
+                usec = 0;
+            else
+                usec -= latency;
+                
+        } 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
+                usec = 0;
+        }
+    }
+
+    if (usec < s->previous_time)
+        usec = s->previous_time;
+
+    s->previous_time = usec;
+
+    return usec;
+}
+
+static pa_usec_t time_counter_diff(pa_stream *s, pa_usec_t t, pa_usec_t c, int *negative) {
+    assert(s);
+    
+    if (negative)
+        *negative = 0;
+
+    if (c < t) {
+        if (s->direction == PA_STREAM_RECORD) {
+            if (negative)
+                *negative = 1;
+
+            return t-c;
+        } else
+            return 0;
+    } else
+        return c-t;
+}
+
+pa_usec_t pa_stream_get_latency(pa_stream *s, const pa_latency_info *i, int *negative) {
+    pa_usec_t t, c;
+    assert(s && i);
+
+    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);
+}
+
+const pa_sample_spec* pa_stream_get_sample_spec(pa_stream *s) {
+    assert(s);
+    return &s->sample_spec;
+}
+
+void pa_stream_trash_ipol(pa_stream *s) {
+    assert(s);
+
+    if (!s->interpolate)
+        return;
+
+    memset(&s->ipol_timestamp, 0, sizeof(s->ipol_timestamp));
+    s->ipol_usec = 0;
+}
+
+pa_usec_t pa_stream_get_interpolated_time(pa_stream *s) {
+    pa_usec_t usec;
+    assert(s && s->interpolate);
+
+    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;
+}
+
+pa_usec_t pa_stream_get_interpolated_latency(pa_stream *s, int *negative) {
+    pa_usec_t t, c;
+    assert(s && s->interpolate);
+
+    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);
+}