diff options
Diffstat (limited to 'src/modules/module-tunnel.c')
| -rw-r--r-- | src/modules/module-tunnel.c | 1929 |
1 files changed, 1929 insertions, 0 deletions
diff --git a/src/modules/module-tunnel.c b/src/modules/module-tunnel.c new file mode 100644 index 00000000..86f30817 --- /dev/null +++ b/src/modules/module-tunnel.c @@ -0,0 +1,1929 @@ +/*** + This file is part of PulseAudio. + + Copyright 2004-2006 Lennart Poettering + Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB + + PulseAudio 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. + + PulseAudio 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 PulseAudio; 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 <unistd.h> +#include <string.h> +#include <errno.h> +#include <sys/types.h> +#include <stdio.h> +#include <stdlib.h> + +#include <pulse/timeval.h> +#include <pulse/util.h> +#include <pulse/version.h> +#include <pulse/xmalloc.h> + +#include <pulsecore/module.h> +#include <pulsecore/core-util.h> +#include <pulsecore/modargs.h> +#include <pulsecore/log.h> +#include <pulsecore/core-subscribe.h> +#include <pulsecore/sink-input.h> +#include <pulsecore/pdispatch.h> +#include <pulsecore/pstream.h> +#include <pulsecore/pstream-util.h> +#include <pulsecore/authkey.h> +#include <pulsecore/socket-client.h> +#include <pulsecore/socket-util.h> +#include <pulsecore/authkey-prop.h> +#include <pulsecore/time-smoother.h> +#include <pulsecore/thread.h> +#include <pulsecore/thread-mq.h> +#include <pulsecore/rtclock.h> +#include <pulsecore/core-error.h> +#include <pulsecore/proplist-util.h> + +#ifdef TUNNEL_SINK +#include "module-tunnel-sink-symdef.h" +#else +#include "module-tunnel-source-symdef.h" +#endif + +#ifdef TUNNEL_SINK +PA_MODULE_DESCRIPTION("Tunnel module for sinks"); +PA_MODULE_USAGE( + "server=<address> " + "sink=<remote sink name> " + "cookie=<filename> " + "format=<sample format> " + "channels=<number of channels> " + "rate=<sample rate> " + "sink_name=<name for the local sink> " + "channel_map=<channel map>"); +#else +PA_MODULE_DESCRIPTION("Tunnel module for sources"); +PA_MODULE_USAGE( + "server=<address> " + "source=<remote source name> " + "cookie=<filename> " + "format=<sample format> " + "channels=<number of channels> " + "rate=<sample rate> " + "source_name=<name for the local source> " + "channel_map=<channel map>"); +#endif + +PA_MODULE_AUTHOR("Lennart Poettering"); +PA_MODULE_VERSION(PACKAGE_VERSION); +PA_MODULE_LOAD_ONCE(FALSE); + +static const char* const valid_modargs[] = { + "server", + "cookie", + "format", + "channels", + "rate", +#ifdef TUNNEL_SINK + "sink_name", + "sink", +#else + "source_name", + "source", +#endif + "channel_map", + NULL, +}; + +#define DEFAULT_TIMEOUT 5 + +#define LATENCY_INTERVAL 10 + +#define MIN_NETWORK_LATENCY_USEC (8*PA_USEC_PER_MSEC) + +#ifdef TUNNEL_SINK + +enum { + SINK_MESSAGE_REQUEST = PA_SINK_MESSAGE_MAX, + SINK_MESSAGE_REMOTE_SUSPEND, + SINK_MESSAGE_UPDATE_LATENCY, + SINK_MESSAGE_POST +}; + +#define DEFAULT_TLENGTH_MSEC 150 +#define DEFAULT_MINREQ_MSEC 25 + +#else + +enum { + SOURCE_MESSAGE_POST = PA_SOURCE_MESSAGE_MAX, + SOURCE_MESSAGE_REMOTE_SUSPEND, + SOURCE_MESSAGE_UPDATE_LATENCY +}; + +#define DEFAULT_FRAGSIZE_MSEC 25 + +#endif + +#ifdef TUNNEL_SINK +static void command_request(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata); +static void command_started(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata); +#endif +static void command_subscribe_event(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata); +static void command_stream_killed(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata); +static void command_overflow_or_underflow(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata); +static void command_suspended(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata); +static void command_moved(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata); + +static const pa_pdispatch_cb_t command_table[PA_COMMAND_MAX] = { +#ifdef TUNNEL_SINK + [PA_COMMAND_REQUEST] = command_request, + [PA_COMMAND_STARTED] = command_started, +#endif + [PA_COMMAND_SUBSCRIBE_EVENT] = command_subscribe_event, + [PA_COMMAND_OVERFLOW] = command_overflow_or_underflow, + [PA_COMMAND_UNDERFLOW] = command_overflow_or_underflow, + [PA_COMMAND_PLAYBACK_STREAM_KILLED] = command_stream_killed, + [PA_COMMAND_RECORD_STREAM_KILLED] = command_stream_killed, + [PA_COMMAND_PLAYBACK_STREAM_SUSPENDED] = command_suspended, + [PA_COMMAND_RECORD_STREAM_SUSPENDED] = command_suspended, + [PA_COMMAND_PLAYBACK_STREAM_MOVED] = command_moved, + [PA_COMMAND_RECORD_STREAM_MOVED] = command_moved, +}; + +struct userdata { + pa_core *core; + pa_module *module; + + pa_thread_mq thread_mq; + pa_rtpoll *rtpoll; + pa_thread *thread; + + pa_socket_client *client; + pa_pstream *pstream; + pa_pdispatch *pdispatch; + + char *server_name; +#ifdef TUNNEL_SINK + char *sink_name; + pa_sink *sink; + int32_t requested_bytes; +#else + char *source_name; + pa_source *source; +#endif + + uint8_t auth_cookie[PA_NATIVE_COOKIE_LENGTH]; + + uint32_t version; + uint32_t ctag; + uint32_t device_index; + uint32_t channel; + + int64_t counter, counter_delta; + + pa_bool_t remote_corked:1; + pa_bool_t remote_suspended:1; + + pa_usec_t transport_usec; + pa_bool_t transport_usec_valid; + + uint32_t ignore_latency_before; + + pa_time_event *time_event; + + pa_bool_t auth_cookie_in_property; + + pa_smoother *smoother; + + char *device_description; + char *server_fqdn; + char *user_name; + + uint32_t maxlength; +#ifdef TUNNEL_SINK + uint32_t tlength; + uint32_t minreq; + uint32_t prebuf; +#else + uint32_t fragsize; +#endif +}; + +static void request_latency(struct userdata *u); + +/* Called from main context */ +static void command_stream_killed(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) { + struct userdata *u = userdata; + + pa_assert(pd); + pa_assert(t); + pa_assert(u); + pa_assert(u->pdispatch == pd); + + pa_log_warn("Stream killed"); + pa_module_unload_request(u->module); +} + +/* Called from main context */ +static void command_overflow_or_underflow(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) { + struct userdata *u = userdata; + + pa_assert(pd); + pa_assert(t); + pa_assert(u); + pa_assert(u->pdispatch == pd); + + pa_log_info("Server signalled buffer overrun/underrun."); + request_latency(u); +} + +/* Called from main context */ +static void command_suspended(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) { + struct userdata *u = userdata; + uint32_t channel; + pa_bool_t suspended; + + pa_assert(pd); + pa_assert(t); + pa_assert(u); + pa_assert(u->pdispatch == pd); + + if (pa_tagstruct_getu32(t, &channel) < 0 || + pa_tagstruct_get_boolean(t, &suspended) < 0 || + !pa_tagstruct_eof(t)) { + pa_log("Invalid packet"); + pa_module_unload_request(u->module); + return; + } + +#ifdef TUNNEL_SINK + pa_asyncmsgq_send(u->sink->asyncmsgq, PA_MSGOBJECT(u->sink), SINK_MESSAGE_REMOTE_SUSPEND, PA_UINT32_TO_PTR(!!suspended), 0, NULL); +#else + pa_asyncmsgq_send(u->source->asyncmsgq, PA_MSGOBJECT(u->source), SOURCE_MESSAGE_REMOTE_SUSPEND, PA_UINT32_TO_PTR(!!suspended), 0, NULL); +#endif + + request_latency(u); +} + +/* Called from main context */ +static void command_moved(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) { + struct userdata *u = userdata; + + pa_assert(pd); + pa_assert(t); + pa_assert(u); + pa_assert(u->pdispatch == pd); + + pa_log_debug("Server reports a stream move."); + request_latency(u); +} + +#ifdef TUNNEL_SINK + +/* Called from main context */ +static void command_started(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) { + struct userdata *u = userdata; + + pa_assert(pd); + pa_assert(t); + pa_assert(u); + pa_assert(u->pdispatch == pd); + + pa_log_debug("Server reports playback started."); + request_latency(u); +} + +#endif + +/* Called from IO thread context */ +static void stream_cork_within_thread(struct userdata *u, pa_bool_t cork) { + pa_usec_t x; + pa_assert(u); + + if (u->remote_corked == cork) + return; + + u->remote_corked = cork; + x = pa_rtclock_usec(); + + /* Correct by the time this needs to travel to the other side. + * This is a valid thread-safe access, because the main thread is + * waiting for us */ + if (u->transport_usec_valid) + x += u->transport_usec; + + if (u->remote_suspended || u->remote_corked) + pa_smoother_pause(u->smoother, x); + else + pa_smoother_resume(u->smoother, x); +} + +/* Called from main context */ +static void stream_cork(struct userdata *u, pa_bool_t cork) { + pa_tagstruct *t; + pa_assert(u); + + if (!u->pstream) + return; + + t = pa_tagstruct_new(NULL, 0); +#ifdef TUNNEL_SINK + pa_tagstruct_putu32(t, PA_COMMAND_CORK_PLAYBACK_STREAM); +#else + pa_tagstruct_putu32(t, PA_COMMAND_CORK_RECORD_STREAM); +#endif + pa_tagstruct_putu32(t, u->ctag++); + pa_tagstruct_putu32(t, u->channel); + pa_tagstruct_put_boolean(t, !!cork); + pa_pstream_send_tagstruct(u->pstream, t); + + request_latency(u); +} + +/* Called from IO thread context */ +static void stream_suspend_within_thread(struct userdata *u, pa_bool_t suspend) { + pa_usec_t x; + pa_assert(u); + + if (u->remote_suspended == suspend) + return; + + u->remote_suspended = suspend; + + x = pa_rtclock_usec(); + + /* Correct by the time this needed to travel from the other side. + * This is a valid thread-safe access, because the main thread is + * waiting for us */ + if (u->transport_usec_valid) + x -= u->transport_usec; + + if (u->remote_suspended || u->remote_corked) + pa_smoother_pause(u->smoother, x); + else + pa_smoother_resume(u->smoother, x); +} + +#ifdef TUNNEL_SINK + +/* Called from IO thread context */ +static void send_data(struct userdata *u) { + pa_assert(u); + + while (u->requested_bytes > 0) { + pa_memchunk memchunk; + + pa_sink_render(u->sink, u->requested_bytes, &memchunk); + pa_asyncmsgq_post(u->thread_mq.outq, PA_MSGOBJECT(u->sink), SINK_MESSAGE_POST, NULL, 0, &memchunk, NULL); + pa_memblock_unref(memchunk.memblock); + + u->requested_bytes -= memchunk.length; + + u->counter += memchunk.length; + } +} + +/* This function is called from IO context -- except when it is not. */ +static int sink_process_msg(pa_msgobject *o, int code, void *data, int64_t offset, pa_memchunk *chunk) { + struct userdata *u = PA_SINK(o)->userdata; + + switch (code) { + + case PA_SINK_MESSAGE_SET_STATE: { + int r; + + /* First, change the state, because otherwide pa_sink_render() would fail */ + if ((r = pa_sink_process_msg(o, code, data, offset, chunk)) >= 0) { + + stream_cork_within_thread(u, u->sink->state == PA_SINK_SUSPENDED); + + if (PA_SINK_IS_OPENED(u->sink->state)) + send_data(u); + } + + return r; + } + + case PA_SINK_MESSAGE_GET_LATENCY: { + pa_usec_t yl, yr, *usec = data; + + yl = pa_bytes_to_usec(u->counter, &u->sink->sample_spec); + yr = pa_smoother_get(u->smoother, pa_rtclock_usec()); + + *usec = yl > yr ? yl - yr : 0; + return 0; + } + + case SINK_MESSAGE_REQUEST: + + pa_assert(offset > 0); + u->requested_bytes += (size_t) offset; + + if (PA_SINK_IS_OPENED(u->sink->thread_info.state)) + send_data(u); + + return 0; + + + case SINK_MESSAGE_REMOTE_SUSPEND: + + stream_suspend_within_thread(u, !!PA_PTR_TO_UINT(data)); + return 0; + + + case SINK_MESSAGE_UPDATE_LATENCY: { + pa_usec_t y; + + y = pa_bytes_to_usec(u->counter, &u->sink->sample_spec); + + if (y > (pa_usec_t) offset || offset < 0) + y -= offset; + else + y = 0; + + pa_smoother_put(u->smoother, pa_rtclock_usec(), y); + + return 0; + } + + case SINK_MESSAGE_POST: + + /* OK, This might be a bit confusing. This message is + * delivered to us from the main context -- NOT from the + * IO thread context where the rest of the messages are + * dispatched. Yeah, ugly, but I am a lazy bastard. */ + + pa_pstream_send_memblock(u->pstream, u->channel, 0, PA_SEEK_RELATIVE, chunk); + + u->counter_delta += chunk->length; + + return 0; + } + + return pa_sink_process_msg(o, code, data, offset, chunk); +} + +/* Called from main context */ +static int sink_set_state(pa_sink *s, pa_sink_state_t state) { + struct userdata *u; + pa_sink_assert_ref(s); + u = s->userdata; + + switch ((pa_sink_state_t) state) { + + case PA_SINK_SUSPENDED: + pa_assert(PA_SINK_IS_OPENED(s->state)); + stream_cork(u, TRUE); + break; + + case PA_SINK_IDLE: + case PA_SINK_RUNNING: + if (s->state == PA_SINK_SUSPENDED) + stream_cork(u, FALSE); + break; + + case PA_SINK_UNLINKED: + case PA_SINK_INIT: + ; + } + + return 0; +} + +#else + +/* This function is called from IO context -- except when it is not. */ +static int source_process_msg(pa_msgobject *o, int code, void *data, int64_t offset, pa_memchunk *chunk) { + struct userdata *u = PA_SOURCE(o)->userdata; + + switch (code) { + + case PA_SINK_MESSAGE_SET_STATE: { + int r; + + if ((r = pa_sink_process_msg(o, code, data, offset, chunk)) >= 0) + stream_cork_within_thread(u, u->source->state == PA_SOURCE_SUSPENDED); + + return r; + } + + case PA_SOURCE_MESSAGE_GET_LATENCY: { + pa_usec_t yr, yl, *usec = data; + + yl = pa_bytes_to_usec(u->counter, &PA_SINK(o)->sample_spec); + yr = pa_smoother_get(u->smoother, pa_rtclock_usec()); + + *usec = yr > yl ? yr - yl : 0; + return 0; + } + + case SOURCE_MESSAGE_POST: + + if (PA_SOURCE_IS_OPENED(u->source->thread_info.state)) + pa_source_post(u->source, chunk); + + u->counter += chunk->length; + + return 0; + + case SOURCE_MESSAGE_REMOTE_SUSPEND: + + stream_suspend_within_thread(u, !!PA_PTR_TO_UINT(data)); + return 0; + + case SOURCE_MESSAGE_UPDATE_LATENCY: { + pa_usec_t y; + + y = pa_bytes_to_usec(u->counter, &u->source->sample_spec); + + if (offset >= 0 || y > (pa_usec_t) -offset) + y += offset; + else + y = 0; + + pa_smoother_put(u->smoother, pa_rtclock_usec(), y); + + return 0; + } + } + + return pa_source_process_msg(o, code, data, offset, chunk); +} + +/* Called from main context */ +static int source_set_state(pa_source *s, pa_source_state_t state) { + struct userdata *u; + pa_source_assert_ref(s); + u = s->userdata; + + switch ((pa_source_state_t) state) { + + case PA_SOURCE_SUSPENDED: + pa_assert(PA_SOURCE_IS_OPENED(s->state)); + stream_cork(u, TRUE); + break; + + case PA_SOURCE_IDLE: + case PA_SOURCE_RUNNING: + if (s->state == PA_SOURCE_SUSPENDED) + stream_cork(u, FALSE); + break; + + case PA_SOURCE_UNLINKED: + case PA_SOURCE_INIT: + ; + } + + return 0; +} + +#endif + +static void thread_func(void *userdata) { + struct userdata *u = userdata; + + pa_assert(u); + + pa_log_debug("Thread starting up"); + + pa_thread_mq_install(&u->thread_mq); + pa_rtpoll_install(u->rtpoll); + + for (;;) { + int ret; + + if ((ret = pa_rtpoll_run(u->rtpoll, TRUE)) < 0) + goto fail; + + if (ret == 0) + goto finish; + } + +fail: + /* If this was no regular exit from the loop we have to continue + * processing messages until we received PA_MESSAGE_SHUTDOWN */ + pa_asyncmsgq_post(u->thread_mq.outq, PA_MSGOBJECT(u->core), PA_CORE_MESSAGE_UNLOAD_MODULE, u->module, 0, NULL, NULL); + pa_asyncmsgq_wait_for(u->thread_mq.inq, PA_MESSAGE_SHUTDOWN); + +finish: + pa_log_debug("Thread shutting down"); +} + +#ifdef TUNNEL_SINK +/* Called from main context */ +static void command_request(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) { + struct userdata *u = userdata; + uint32_t bytes, channel; + + pa_assert(pd); + pa_assert(command == PA_COMMAND_REQUEST); + pa_assert(t); + pa_assert(u); + pa_assert(u->pdispatch == pd); + + if (pa_tagstruct_getu32(t, &channel) < 0 || + pa_tagstruct_getu32(t, &bytes) < 0) { + pa_log("Invalid protocol reply"); + goto fail; + } + + if (channel != u->channel) { + pa_log("Recieved data for invalid channel"); + goto fail; + } + + pa_asyncmsgq_post(u->sink->asyncmsgq, PA_MSGOBJECT(u->sink), SINK_MESSAGE_REQUEST, NULL, bytes, NULL, NULL); + return; + +fail: + pa_module_unload_request(u->module); +} + +#endif + +/* Called from main context */ +static void stream_get_latency_callback(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) { + struct userdata *u = userdata; + pa_usec_t sink_usec, source_usec, transport_usec; + pa_bool_t playing; + int64_t write_index, read_index; + struct timeval local, remote, now; + pa_sample_spec *ss; + int64_t delay; + + pa_assert(pd); + pa_assert(u); + + if (command != PA_COMMAND_REPLY) { + if (command == PA_COMMAND_ERROR) + pa_log("Failed to get latency."); + else + pa_log("Protocol error."); + goto fail; + } + + if (pa_tagstruct_get_usec(t, &sink_usec) < 0 || + pa_tagstruct_get_usec(t, &source_usec) < 0 || + pa_tagstruct_get_boolean(t, &playing) < 0 || + pa_tagstruct_get_timeval(t, &local) < 0 || + pa_tagstruct_get_timeval(t, &remote) < 0 || + pa_tagstruct_gets64(t, &write_index) < 0 || + pa_tagstruct_gets64(t, &read_index) < 0) { + pa_log("Invalid reply."); + goto fail; + } + +#ifdef TUNNEL_SINK + if (u->version >= 13) { + uint64_t underrun_for = 0, playing_for = 0; + + if (pa_tagstruct_getu64(t, &underrun_for) < 0 || + pa_tagstruct_getu64(t, &playing_for) < 0) { + pa_log("Invalid reply."); + goto fail; + } + } +#endif + + if (!pa_tagstruct_eof(t)) { + pa_log("Invalid reply."); + goto fail; + } + + if (tag < u->ignore_latency_before) { + request_latency(u); + return; + } + + pa_gettimeofday(&now); + + /* Calculate transport usec */ + if (pa_timeval_cmp(&local, &remote) < 0 && pa_timeval_cmp(&remote, &now)) { + /* local and remote seem to have synchronized clocks */ +#ifdef TUNNEL_SINK + u->transport_usec = pa_timeval_diff(&remote, &local); +#else + u->transport_usec = pa_timeval_diff(&now, &remote); +#endif + } else + u->transport_usec = pa_timeval_diff(&now, &local)/2; + u->transport_usec_valid = TRUE; + + /* First, take the device's delay */ +#ifdef TUNNEL_SINK + delay = (int64_t) sink_usec; + ss = &u->sink->sample_spec; +#else + delay = (int64_t) source_usec; + ss = &u->source->sample_spec; +#endif + + /* Add the length of our server-side buffer */ + if (write_index >= read_index) + delay += (int64_t) pa_bytes_to_usec(write_index-read_index, ss); + else + delay -= (int64_t) pa_bytes_to_usec(read_index-write_index, ss); + + /* Our measurements are already out of date, hence correct by the * + * transport latency */ +#ifdef TUNNEL_SINK + delay -= (int64_t) transport_usec; +#else + delay += (int64_t) transport_usec; +#endif + + /* Now correct by what we have have read/written since we requested the update */ +#ifdef TUNNEL_SINK + delay += (int64_t) pa_bytes_to_usec(u->counter_delta, ss); +#else + delay -= (int64_t) pa_bytes_to_usec(u->counter_delta, ss); +#endif + +#ifdef TUNNEL_SINK + pa_asyncmsgq_send(u->sink->asyncmsgq, PA_MSGOBJECT(u->sink), SINK_MESSAGE_UPDATE_LATENCY, 0, delay, NULL); +#else + pa_asyncmsgq_send(u->source->asyncmsgq, PA_MSGOBJECT(u->source), SOURCE_MESSAGE_UPDATE_LATENCY, 0, delay, NULL); +#endif + + return; + +fail: + + pa_module_unload_request(u->module); +} + +/* Called from main context */ +static void request_latency(struct userdata *u) { + pa_tagstruct *t; + struct timeval now; + uint32_t tag; + pa_assert(u); + + t = pa_tagstruct_new(NULL, 0); +#ifdef TUNNEL_SINK + pa_tagstruct_putu32(t, PA_COMMAND_GET_PLAYBACK_LATENCY); +#else + pa_tagstruct_putu32(t, PA_COMMAND_GET_RECORD_LATENCY); +#endif + pa_tagstruct_putu32(t, tag = u->ctag++); + pa_tagstruct_putu32(t, u->channel); + + pa_gettimeofday(&now); + pa_tagstruct_put_timeval(t, &now); + + pa_pstream_send_tagstruct(u->pstream, t); + pa_pdispatch_register_reply(u->pdispatch, tag, DEFAULT_TIMEOUT, stream_get_latency_callback, u, NULL); + + u->ignore_latency_before = tag; + u->counter_delta = 0; +} + +/* Called from main context */ +static void timeout_callback(pa_mainloop_api *m, pa_time_event*e, const struct timeval *tv, void *userdata) { + struct userdata *u = userdata; + struct timeval ntv; + + pa_assert(m); + pa_assert(e); + pa_assert(u); + + request_latency(u); + + pa_gettimeofday(&ntv); + ntv.tv_sec += LATENCY_INTERVAL; + m->time_restart(e, &ntv); +} + +/* Called from main context */ +static void update_description(struct userdata *u) { + char *d; + char un[128], hn[128]; + pa_tagstruct *t; + + pa_assert(u); + + if (!u->server_fqdn || !u->user_name || !u->device_description) + return; + + d = pa_sprintf_malloc("%s on %s@%s", u->device_description, u->user_name, u->server_fqdn); + +#ifdef TUNNEL_SINK + pa_sink_set_description(u->sink, d); + pa_proplist_sets(u->sink->proplist, "tunnel.remote.user", u->user_name); + pa_proplist_sets(u->sink->proplist, "tunnel.remote.fqdn", u->server_fqdn); + pa_proplist_sets(u->sink->proplist, "tunnel.remote.description", u->device_description); +#else + pa_source_set_description(u->source, d); + pa_proplist_sets(u->source->proplist, "tunnel.remote.user", u->user_name); + pa_proplist_sets(u->source->proplist, "tunnel.remote.fqdn", u->server_fqdn); + pa_proplist_sets(u->source->proplist, "tunnel.remote.description", u->device_description); +#endif + + pa_xfree(d); + + d = pa_sprintf_malloc("%s for %s@%s", u->device_description, + pa_get_user_name(un, sizeof(un)), + pa_get_host_name(hn, sizeof(hn))); + + t = pa_tagstruct_new(NULL, 0); +#ifdef TUNNEL_SINK + pa_tagstruct_putu32(t, PA_COMMAND_SET_PLAYBACK_STREAM_NAME); +#else + pa_tagstruct_putu32(t, PA_COMMAND_SET_RECORD_STREAM_NAME); +#endif + pa_tagstruct_putu32(t, u->ctag++); + pa_tagstruct_putu32(t, u->channel); + pa_tagstruct_puts(t, d); + pa_pstream_send_tagstruct(u->pstream, t); + + pa_xfree(d); +} + +/* Called from main context */ +static void server_info_cb(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) { + struct userdata *u = userdata; + pa_sample_spec ss; + const char *server_name, *server_version, *user_name, *host_name, *default_sink_name, *default_source_name; + uint32_t cookie; + + pa_assert(pd); + pa_assert(u); + + if (command != PA_COMMAND_REPLY) { + if (command == PA_COMMAND_ERROR) + pa_log("Failed to get info."); + else + pa_log("Protocol error."); + goto fail; + } + + if (pa_tagstruct_gets(t, &server_name) < 0 || + pa_tagstruct_gets(t, &server_version) < 0 || + pa_tagstruct_gets(t, &user_name) < 0 || + pa_tagstruct_gets(t, &host_name) < 0 || + pa_tagstruct_get_sample_spec(t, &ss) < 0 || + pa_tagstruct_gets(t, &default_sink_name) < 0 || + pa_tagstruct_gets(t, &default_source_name) < 0 || + pa_tagstruct_getu32(t, &cookie) < 0) { + + pa_log("Parse failure"); + goto fail; + } + + if (!pa_tagstruct_eof(t)) { + pa_log("Packet too long"); + goto fail; + } + + pa_xfree(u->server_fqdn); + u->server_fqdn = pa_xstrdup(host_name); + + pa_xfree(u->user_name); + u->user_name = pa_xstrdup(user_name); + + update_description(u); + + return; + +fail: + pa_module_unload_request(u->module); +} + +#ifdef TUNNEL_SINK + +/* Called from main context */ +static void sink_info_cb(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) { + struct userdata *u = userdata; + uint32_t idx, owner_module, monitor_source, flags; + const char *name, *description, *monitor_source_name, *driver; + pa_sample_spec ss; + pa_channel_map cm; + pa_cvolume volume; + pa_bool_t mute; + pa_usec_t latency; + pa_proplist *pl; + + pa_assert(pd); + pa_assert(u); + + pl = pa_proplist_new(); + + if (command != PA_COMMAND_REPLY) { + if (command == PA_COMMAND_ERROR) + pa_log("Failed to get info."); + else + pa_log("Protocol error."); + goto fail; + } + + if (pa_tagstruct_getu32(t, &idx) < 0 || + pa_tagstruct_gets(t, &name) < 0 || + pa_tagstruct_gets(t, &description) < 0 || + pa_tagstruct_get_sample_spec(t, &ss) < 0 || + pa_tagstruct_get_channel_map(t, &cm) < 0 || + pa_tagstruct_getu32(t, &owner_module) < 0 || + pa_tagstruct_get_cvolume(t, &volume) < 0 || + pa_tagstruct_get_boolean(t, &mute) < 0 || + pa_tagstruct_getu32(t, &monitor_source) < 0 || + pa_tagstruct_gets(t, &monitor_source_name) < 0 || + pa_tagstruct_get_usec(t, &latency) < 0 || + pa_tagstruct_gets(t, &driver) < 0 || + pa_tagstruct_getu32(t, &flags) < 0) { + + pa_log("Parse failure"); + goto fail; + } + + if (u->version >= 13) { + pa_usec_t configured_latency; + + if (pa_tagstruct_get_proplist(t, pl) < 0 || + pa_tagstruct_get_usec(t, &configured_latency) < 0) { + + pa_log("Parse failure"); + goto fail; + } + } + + if (!pa_tagstruct_eof(t)) { + pa_log("Packet too long"); + goto fail; + } + + pa_proplist_free(pl); + + if (!u->sink_name || strcmp(name, u->sink_name)) + return; + + pa_xfree(u->device_description); + u->device_description = pa_xstrdup(description); + + update_description(u); + + return; + +fail: + pa_module_unload_request(u->module); + pa_proplist_free(pl); +} + +/* Called from main context */ +static void sink_input_info_cb(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) { + struct userdata *u = userdata; + uint32_t idx, owner_module, client, sink; + pa_usec_t buffer_usec, sink_usec; + const char *name, *driver, *resample_method; + pa_bool_t mute; + pa_sample_spec sample_spec; + pa_channel_map channel_map; + pa_cvolume volume; + pa_proplist *pl; + + pa_assert(pd); + pa_assert(u); + + pl = pa_proplist_new(); + + if (command != PA_COMMAND_REPLY) { + if (command == PA_COMMAND_ERROR) + pa_log("Failed to get info."); + else + pa_log("Protocol error."); + goto fail; + } + + if (pa_tagstruct_getu32(t, &idx) < 0 || + pa_tagstruct_gets(t, &name) < 0 || + pa_tagstruct_getu32(t, &owner_module) < 0 || + pa_tagstruct_getu32(t, &client) < 0 || + pa_tagstruct_getu32(t, &sink) < 0 || + pa_tagstruct_get_sample_spec(t, &sample_spec) < 0 || + pa_tagstruct_get_channel_map(t, &channel_map) < 0 || + pa_tagstruct_get_cvolume(t, &volume) < 0 || + pa_tagstruct_get_usec(t, &buffer_usec) < 0 || + pa_tagstruct_get_usec(t, &sink_usec) < 0 || + pa_tagstruct_gets(t, &resample_method) < 0 || + pa_tagstruct_gets(t, &driver) < 0) { + + pa_log("Parse failure"); + goto fail; + } + + if (u->version >= 11) { + if (pa_tagstruct_get_boolean(t, &mute) < 0) { + + pa_log("Parse failure"); + goto fail; + } + } + + if (u->version >= 13) { + if (pa_tagstruct_get_proplist(t, pl) < 0) { + + pa_log("Parse failure"); + goto fail; + } + } + + if (!pa_tagstruct_eof(t)) { + pa_log("Packet too long"); + goto fail; + } + + pa_proplist_free(pl); + + if (idx != u->device_index) + return; + + pa_assert(u->sink); + + if ((u->version < 11 || !!mute == !!u->sink->muted) && + pa_cvolume_equal(&volume, &u->sink->volume)) + return; + + memcpy(&u->sink->volume, &volume, sizeof(pa_cvolume)); + + if (u->version >= 11) + u->sink->muted = !!mute; + + pa_subscription_post(u->sink->core, PA_SUBSCRIPTION_EVENT_SINK|PA_SUBSCRIPTION_EVENT_CHANGE, u->sink->index); + return; + +fail: + pa_module_unload_request(u->module); + pa_proplist_free(pl); +} + +#else + +/* Called from main context */ +static void source_info_cb(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) { + struct userdata *u = userdata; + uint32_t idx, owner_module, monitor_of_sink, flags; + const char *name, *description, *monitor_of_sink_name, *driver; + pa_sample_spec ss; + pa_channel_map cm; + pa_cvolume volume; + pa_bool_t mute; + pa_usec_t latency, configured_latency; + pa_proplist *pl; + + pa_assert(pd); + pa_assert(u); + + pl = pa_proplist_new(); + + if (command != PA_COMMAND_REPLY) { + if (command == PA_COMMAND_ERROR) + pa_log("Failed to get info."); + else + pa_log("Protocol error."); + goto fail; + } + + if (pa_tagstruct_getu32(t, &idx) < 0 || + pa_tagstruct_gets(t, &name) < 0 || + pa_tagstruct_gets(t, &description) < 0 || + pa_tagstruct_get_sample_spec(t, &ss) < 0 || + pa_tagstruct_get_channel_map(t, &cm) < 0 || + pa_tagstruct_getu32(t, &owner_module) < 0 || + pa_tagstruct_get_cvolume(t, &volume) < 0 || + pa_tagstruct_get_boolean(t, &mute) < 0 || + pa_tagstruct_getu32(t, &monitor_of_sink) < 0 || + pa_tagstruct_gets(t, &monitor_of_sink_name) < 0 || + pa_tagstruct_get_usec(t, &latency) < 0 || + pa_tagstruct_gets(t, &driver) < 0 || + pa_tagstruct_getu32(t, &flags) < 0) { + + pa_log("Parse failure"); + goto fail; + } + + if (u->version >= 13) { + if (pa_tagstruct_get_proplist(t, pl) < 0 || + pa_tagstruct_get_usec(t, &configured_latency) < 0) { + + pa_log("Parse failure"); + goto fail; + } + } + + if (!pa_tagstruct_eof(t)) { + pa_log("Packet too long"); + goto fail; + } + + pa_proplist_free(pl); + + if (!u->source_name || strcmp(name, u->source_name)) + return; + + pa_xfree(u->device_description); + u->device_description = pa_xstrdup(description); + + update_description(u); + + return; + +fail: + pa_module_unload_request(u->module); + pa_proplist_free(pl); +} + +#endif + +/* Called from main context */ +static void request_info(struct userdata *u) { + pa_tagstruct *t; + uint32_t tag; + pa_assert(u); + + t = pa_tagstruct_new(NULL, 0); + pa_tagstruct_putu32(t, PA_COMMAND_GET_SERVER_INFO); + pa_tagstruct_putu32(t, tag = u->ctag++); + pa_pstream_send_tagstruct(u->pstream, t); + pa_pdispatch_register_reply(u->pdispatch, tag, DEFAULT_TIMEOUT, server_info_cb, u, NULL); + +#ifdef TUNNEL_SINK + t = pa_tagstruct_new(NULL, 0); + pa_tagstruct_putu32(t, PA_COMMAND_GET_SINK_INPUT_INFO); + pa_tagstruct_putu32(t, tag = u->ctag++); + pa_tagstruct_putu32(t, u->device_index); + pa_pstream_send_tagstruct(u->pstream, t); + pa_pdispatch_register_reply(u->pdispatch, tag, DEFAULT_TIMEOUT, sink_input_info_cb, u, NULL); + + if (u->sink_name) { + t = pa_tagstruct_new(NULL, 0); + pa_tagstruct_putu32(t, PA_COMMAND_GET_SINK_INFO); + pa_tagstruct_putu32(t, tag = u->ctag++); + pa_tagstruct_putu32(t, PA_INVALID_INDEX); + pa_tagstruct_puts(t, u->sink_name); + pa_pstream_send_tagstruct(u->pstream, t); + pa_pdispatch_register_reply(u->pdispatch, tag, DEFAULT_TIMEOUT, sink_info_cb, u, NULL); + } +#else + if (u->source_name) { + t = pa_tagstruct_new(NULL, 0); + pa_tagstruct_putu32(t, PA_COMMAND_GET_SOURCE_INFO); + pa_tagstruct_putu32(t, tag = u->ctag++); + pa_tagstruct_putu32(t, PA_INVALID_INDEX); + pa_tagstruct_puts(t, u->source_name); + pa_pstream_send_tagstruct(u->pstream, t); + pa_pdispatch_register_reply(u->pdispatch, tag, DEFAULT_TIMEOUT, source_info_cb, u, NULL); + } +#endif +} + +/* Called from main context */ +static void command_subscribe_event(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) { + struct userdata *u = userdata; + pa_subscription_event_type_t e; + uint32_t idx; + + pa_assert(pd); + pa_assert(t); + pa_assert(u); + pa_assert(command == PA_COMMAND_SUBSCRIBE_EVENT); + + if (pa_tagstruct_getu32(t, &e) < 0 || + pa_tagstruct_getu32(t, &idx) < 0) { + pa_log("Invalid protocol reply"); + pa_module_unload_request(u->module); + return; + } + + if (e != (PA_SUBSCRIPTION_EVENT_SERVER|PA_SUBSCRIPTION_EVENT_CHANGE) && +#ifdef TUNNEL_SINK + e != (PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE) && + e != (PA_SUBSCRIPTION_EVENT_SINK|PA_SUBSCRIPTION_EVENT_CHANGE) +#else + e != (PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE) +#endif + ) + return; + + request_info(u); +} + +/* Called from main context */ +static void start_subscribe(struct userdata *u) { + pa_tagstruct *t; + uint32_t tag; + pa_assert(u); + + t = pa_tagstruct_new(NULL, 0); + pa_tagstruct_putu32(t, PA_COMMAND_SUBSCRIBE); + pa_tagstruct_putu32(t, tag = u->ctag++); + pa_tagstruct_putu32(t, PA_SUBSCRIPTION_MASK_SERVER| +#ifdef TUNNEL_SINK + PA_SUBSCRIPTION_MASK_SINK_INPUT|PA_SUBSCRIPTION_MASK_SINK +#else + PA_SUBSCRIPTION_MASK_SOURCE +#endif + ); + + pa_pstream_send_tagstruct(u->pstream, t); +} + +/* Called from main context */ +static void create_stream_callback(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) { + struct userdata *u = userdata; + struct timeval ntv; +#ifdef TUNNEL_SINK + uint32_t bytes; +#endif + + pa_assert(pd); + pa_assert(u); + pa_assert(u->pdispatch == pd); + + if (command != PA_COMMAND_REPLY) { + if (command == PA_COMMAND_ERROR) + pa_log("Failed to create stream."); + else + pa_log("Protocol error."); + goto fail; + } + + if (pa_tagstruct_getu32(t, &u->channel) < 0 || + pa_tagstruct_getu32(t, &u->device_index) < 0 +#ifdef TUNNEL_SINK + || pa_tagstruct_getu32(t, &bytes) < 0 +#endif + ) + goto parse_error; + + if (u->version >= 9) { +#ifdef TUNNEL_SINK + if (pa_tagstruct_getu32(t, &u->maxlength) < 0 || + pa_tagstruct_getu32(t, &u->tlength) < 0 || + pa_tagstruct_getu32(t, &u->prebuf) < 0 || + pa_tagstruct_getu32(t, &u->minreq) < 0) + goto parse_error; +#else + if (pa_tagstruct_getu32(t, &u->maxlength) < 0 || + pa_tagstruct_getu32(t, &u->fragsize) < 0) + goto parse_error; +#endif + } + + if (u->version >= 12) { + pa_sample_spec ss; + pa_channel_map cm; + uint32_t device_index; + const char *dn; + pa_bool_t suspended; + + if (pa_tagstruct_get_sample_spec(t, &ss) < 0 || + pa_tagstruct_get_channel_map(t, &cm) < 0 || + pa_tagstruct_getu32(t, &device_index) < 0 || + pa_tagstruct_gets(t, &dn) < 0 || + pa_tagstruct_get_boolean(t, &suspended) < 0) + goto parse_error; + +#ifdef TUNNEL_SINK + pa_xfree(u->sink_name); + u->sink_name = pa_xstrdup(dn); +#else + pa_xfree(u->source_name); + u->source_name = pa_xstrdup(dn); +#endif + } + + if (u->version >= 13) { + pa_usec_t usec; + + if (pa_tagstruct_get_usec(t, &usec) < 0) + goto parse_error; + +#ifdef TUNNEL_SINK + pa_sink_set_latency_range(u->sink, usec + MIN_NETWORK_LATENCY_USEC, 0); +#else + pa_source_set_latency_range(u->source, usec + MIN_NETWORK_LATENCY_USEC, 0); +#endif + } + + if (!pa_tagstruct_eof(t)) + goto parse_error; + + start_subscribe(u); + request_info(u); + + pa_assert(!u->time_event); + pa_gettimeofday(&ntv); + ntv.tv_sec += LATENCY_INTERVAL; + u->time_event = u->core->mainloop->time_new(u->core->mainloop, &ntv, timeout_callback, u); + + request_latency(u); + + pa_log_debug("Stream created."); + +#ifdef TUNNEL_SINK + pa_asyncmsgq_post(u->sink->asyncmsgq, PA_MSGOBJECT(u->sink), SINK_MESSAGE_REQUEST, NULL, bytes, NULL, NULL); +#endif + + return; + +parse_error: + pa_log("Invalid reply. (Create stream)"); + +fail: + pa_module_unload_request(u->module); + +} + +/* Called from main context */ +static void setup_complete_callback(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) { + struct userdata *u = userdata; + pa_tagstruct *reply; + char name[256], un[128], hn[128]; +#ifdef TUNNEL_SINK + pa_cvolume volume; +#endif + + pa_assert(pd); + pa_assert(u); + pa_assert(u->pdispatch == pd); + + if (command != PA_COMMAND_REPLY || + pa_tagstruct_getu32(t, &u->version) < 0 || + !pa_tagstruct_eof(t)) { + + if (command == PA_COMMAND_ERROR) + pa_log("Failed to authenticate"); + else + pa_log("Protocol error."); + + goto fail; + } + + /* Minimum supported protocol version */ + if (u->version < 8) { + pa_log("Incompatible protocol version"); + goto fail; + } + + /* Starting with protocol version 13 the MSB of the version tag + reflects if shm is enabled for this connection or not. We don't + support SHM here at all, so we just ignore this. */ + + if (u->version >= 13) + u->version &= 0x7FFFFFFFU; + + pa_log_debug("Protocol version: remote %u, local %u", u->version, PA_PROTOCOL_VERSION); + +#ifdef TUNNEL_SINK + pa_snprintf(name, sizeof(name), "%s for %s@%s", + u->sink_name, + pa_get_user_name(un, sizeof(un)), + pa_get_host_name(hn, sizeof(hn))); +#else + pa_snprintf(name, sizeof(name), "%s for %s@%s", + u->source_name, + pa_get_user_name(un, sizeof(un)), + pa_get_host_name(hn, sizeof(hn))); +#endif + + reply = pa_tagstruct_new(NULL, 0); + pa_tagstruct_putu32(reply, PA_COMMAND_SET_CLIENT_NAME); + pa_tagstruct_putu32(reply, tag = u->ctag++); + + if (u->version >= 13) { + pa_proplist *pl; + pl = pa_proplist_new(); + pa_init_proplist(pl); + pa_proplist_sets(pl, PA_PROP_APPLICATION_ID, "org.PulseAudio.PulseAudio"); + pa_proplist_sets(pl, PA_PROP_APPLICATION_VERSION, PACKAGE_VERSION); + pa_tagstruct_put_proplist(reply, pl); + pa_proplist_free(pl); + } else + pa_tagstruct_puts(reply, "PulseAudio"); + + pa_pstream_send_tagstruct(u->pstream, reply); + /* We ignore the server's reply here */ + + reply = pa_tagstruct_new(NULL, 0); + + if (u->version < 13) + /* Only for older PA versions we need to fill in the maxlength */ + u->maxlength = 4*1024*1024; + +#ifdef TUNNEL_SINK + u->tlength = pa_usec_to_bytes(PA_USEC_PER_MSEC * DEFAULT_TLENGTH_MSEC, &u->sink->sample_spec); + u->minreq = pa_usec_to_bytes(PA_USEC_PER_MSEC * DEFAULT_MINREQ_MSEC, &u->sink->sample_spec); + u->prebuf = u->tlength; +#else + u->fragsize = pa_usec_to_bytes(PA_USEC_PER_MSEC * DEFAULT_FRAGSIZE_MSEC, &u->source->sample_spec); +#endif + +#ifdef TUNNEL_SINK + pa_tagstruct_putu32(reply, PA_COMMAND_CREATE_PLAYBACK_STREAM); + pa_tagstruct_putu32(reply, tag = u->ctag++); + + if (u->version < 13) + pa_tagstruct_puts(reply, name); + + pa_tagstruct_put_sample_spec(reply, &u->sink->sample_spec); + pa_tagstruct_put_channel_map(reply, &u->sink->channel_map); + pa_tagstruct_putu32(reply, PA_INVALID_INDEX); + pa_tagstruct_puts(reply, u->sink_name); + pa_tagstruct_putu32(reply, u->maxlength); + pa_tagstruct_put_boolean(reply, !PA_SINK_IS_OPENED(pa_sink_get_state(u->sink))); + pa_tagstruct_putu32(reply, u->tlength); + pa_tagstruct_putu32(reply, u->prebuf); + pa_tagstruct_putu32(reply, u->minreq); + pa_tagstruct_putu32(reply, 0); + pa_cvolume_reset(&volume, u->sink->sample_spec.channels); + pa_tagstruct_put_cvolume(reply, &volume); +#else + pa_tagstruct_putu32(reply, PA_COMMAND_CREATE_RECORD_STREAM); + pa_tagstruct_putu32(reply, tag = u->ctag++); + + if (u->version < 13) + pa_tagstruct_puts(reply, name); + + pa_tagstruct_put_sample_spec(reply, &u->source->sample_spec); + pa_tagstruct_put_channel_map(reply, &u->source->channel_map); + pa_tagstruct_putu32(reply, PA_INVALID_INDEX); + pa_tagstruct_puts(reply, u->source_name); + pa_tagstruct_putu32(reply, u->maxlength); + pa_tagstruct_put_boolean(reply, !PA_SOURCE_IS_OPENED(pa_source_get_state(u->source))); + pa_tagstruct_putu32(reply, u->fragsize); +#endif + + if (u->version >= 12) { + pa_tagstruct_put_boolean(reply, FALSE); /* no_remap */ + pa_tagstruct_put_boolean(reply, FALSE); /* no_remix */ + pa_tagstruct_put_boolean(reply, FALSE); /* fix_format */ + pa_tagstruct_put_boolean(reply, FALSE); /* fix_rate */ + pa_tagstruct_put_boolean(reply, FALSE); /* fix_channels */ + pa_tagstruct_put_boolean(reply, TRUE); /* no_move */ + pa_tagstruct_put_boolean(reply, FALSE); /* variable_rate */ + } + + if (u->version >= 13) { + pa_proplist *pl; + + pa_tagstruct_put_boolean(reply, FALSE); /* start muted/peak detect*/ + pa_tagstruct_put_boolean(reply, TRUE); /* adjust_latency */ + + pl = pa_proplist_new(); + pa_proplist_sets(pl, PA_PROP_MEDIA_NAME, name); + pa_proplist_sets(pl, PA_PROP_MEDIA_ROLE, "abstract"); + pa_tagstruct_put_proplist(reply, pl); + pa_proplist_free(pl); + +#ifndef TUNNEL_SINK + pa_tagstruct_putu32(reply, PA_INVALID_INDEX); /* direct on input */ +#endif + } + + pa_pstream_send_tagstruct(u->pstream, reply); + pa_pdispatch_register_reply(u->pdispatch, tag, DEFAULT_TIMEOUT, create_stream_callback, u, NULL); + + pa_log_debug("Connection authenticated, creating stream ..."); + + return; + +fail: + pa_module_unload_request(u->module); +} + +/* Called from main context */ +static void pstream_die_callback(pa_pstream *p, void *userdata) { + struct userdata *u = userdata; + + pa_assert(p); + pa_assert(u); + + pa_log_warn("Stream died."); + pa_module_unload_request(u->module); +} + +/* Called from main context */ +static void pstream_packet_callback(pa_pstream *p, pa_packet *packet, const pa_creds *creds, void *userdata) { + struct userdata *u = userdata; + + pa_assert(p); + pa_assert(packet); + pa_assert(u); + + if (pa_pdispatch_run(u->pdispatch, packet, creds, u) < 0) { + pa_log("Invalid packet"); + pa_module_unload_request(u->module); + return; + } +} + +#ifndef TUNNEL_SINK +/* Called from main context */ +static void pstream_memblock_callback(pa_pstream *p, uint32_t channel, int64_t offset, pa_seek_mode_t seek, const pa_memchunk *chunk, void *userdata) { + struct userdata *u = userdata; + + pa_assert(p); + pa_assert(chunk); + pa_assert(u); + + if (channel != u->channel) { + pa_log("Recieved memory block on bad channel."); + pa_module_unload_request(u->module); + return; + } + + pa_asyncmsgq_send(u->source->asyncmsgq, PA_MSGOBJECT(u->source), SOURCE_MESSAGE_POST, PA_UINT_TO_PTR(seek), offset, chunk); + + u->counter_delta += chunk->length; +} + +#endif + +/* Called from main context */ +static void on_connection(pa_socket_client *sc, pa_iochannel *io, void *userdata) { + struct userdata *u = userdata; + pa_tagstruct *t; + uint32_t tag; + + pa_assert(sc); + pa_assert(u); + pa_assert(u->client == sc); + + pa_socket_client_unref(u->client); + u->client = NULL; + + if (!io) { + pa_log("Connection failed: %s", pa_cstrerror(errno)); + pa_module_unload_request(u->module); + return; + } + + u->pstream = pa_pstream_new(u->core->mainloop, io, u->core->mempool); + u->pdispatch = pa_pdispatch_new(u->core->mainloop, command_table, PA_COMMAND_MAX); + + pa_pstream_set_die_callback(u->pstream, pstream_die_callback, u); + pa_pstream_set_recieve_packet_callback(u->pstream, pstream_packet_callback, u); +#ifndef TUNNEL_SINK + pa_pstream_set_recieve_memblock_callback(u->pstream, pstream_memblock_callback, u); +#endif + + t = pa_tagstruct_new(NULL, 0); + pa_tagstruct_putu32(t, PA_COMMAND_AUTH); + pa_tagstruct_putu32(t, tag = u->ctag++); + pa_tagstruct_putu32(t, PA_PROTOCOL_VERSION); + pa_tagstruct_put_arbitrary(t, u->auth_cookie, sizeof(u->auth_cookie)); + +#ifdef HAVE_CREDS +{ + pa_creds ucred; + + if (pa_iochannel_creds_supported(io)) + pa_iochannel_creds_enable(io); + + ucred.uid = getuid(); + ucred.gid = getgid(); + + pa_pstream_send_tagstruct_with_creds(u->pstream, t, &ucred); +} +#else + pa_pstream_send_tagstruct(u->pstream, t); +#endif + + pa_pdispatch_register_reply(u->pdispatch, tag, DEFAULT_TIMEOUT, setup_complete_callback, u, NULL); + + pa_log_debug("Connection established, authenticating ..."); +} + +#ifdef TUNNEL_SINK + +/* Called from main context */ +static int sink_set_volume(pa_sink *sink) { + struct userdata *u; + pa_tagstruct *t; + uint32_t tag; + + pa_assert(sink); + u = sink->userdata; + pa_assert(u); + + t = pa_tagstruct_new(NULL, 0); + pa_tagstruct_putu32(t, PA_COMMAND_SET_SINK_INPUT_VOLUME); + pa_tagstruct_putu32(t, tag = u->ctag++); + pa_tagstruct_putu32(t, u->device_index); + pa_tagstruct_put_cvolume(t, &sink->volume); + pa_pstream_send_tagstruct(u->pstream, t); + + return 0; +} + +/* Called from main context */ +static int sink_set_mute(pa_sink *sink) { + struct userdata *u; + pa_tagstruct *t; + uint32_t tag; + + pa_assert(sink); + u = sink->userdata; + pa_assert(u); + + if (u->version < 11) + return -1; + + t = pa_tagstruct_new(NULL, 0); + pa_tagstruct_putu32(t, PA_COMMAND_SET_SINK_INPUT_MUTE); + pa_tagstruct_putu32(t, tag = u->ctag++); + pa_tagstruct_putu32(t, u->device_index); + pa_tagstruct_put_boolean(t, !!sink->muted); + pa_pstream_send_tagstruct(u->pstream, t); + + return 0; +} + +#endif + +/* Called from main context */ +static int load_key(struct userdata *u, const char*fn) { + pa_assert(u); + + u->auth_cookie_in_property = FALSE; + + if (!fn && pa_authkey_prop_get(u->core, PA_NATIVE_COOKIE_PROPERTY_NAME, u->auth_cookie, sizeof(u->auth_cookie)) >= 0) { + pa_log_debug("Using already loaded auth cookie."); + pa_authkey_prop_ref(u->core, PA_NATIVE_COOKIE_PROPERTY_NAME); + u->auth_cookie_in_property = 1; + return 0; + } + + if (!fn) + fn = PA_NATIVE_COOKIE_FILE; + + if (pa_authkey_load_auto(fn, u->auth_cookie, sizeof(u->auth_cookie)) < 0) + return -1; + + pa_log_debug("Loading cookie from disk."); + + if (pa_authkey_prop_put(u->core, PA_NATIVE_COOKIE_PROPERTY_NAME, u->auth_cookie, sizeof(u->auth_cookie)) >= 0) + u->auth_cookie_in_property = TRUE; + + return 0; +} + +int pa__init(pa_module*m) { + pa_modargs *ma = NULL; + struct userdata *u = NULL; + pa_sample_spec ss; + pa_channel_map map; + char *dn = NULL; +#ifdef TUNNEL_SINK + pa_sink_new_data data; +#else + pa_source_new_data data; +#endif + + pa_assert(m); + + if (!(ma = pa_modargs_new(m->argument, valid_modargs))) { + pa_log("Failed to parse module arguments"); + goto fail; + } + + m->userdata = u = pa_xnew0(struct userdata, 1); + u->core = m->core; + u->module = m; + u->client = NULL; + u->pdispatch = NULL; + u->pstream = NULL; + u->server_name = NULL; +#ifdef TUNNEL_SINK + u->sink_name = pa_xstrdup(pa_modargs_get_value(ma, "sink", NULL));; + u->sink = NULL; + u->requested_bytes = 0; +#else + u->source_name = pa_xstrdup(pa_modargs_get_value(ma, "source", NULL));; + u->source = NULL; +#endif + u->smoother = pa_smoother_new(PA_USEC_PER_SEC, PA_USEC_PER_SEC*2, TRUE, 10); + u->ctag = 1; + u->device_index = u->channel = PA_INVALID_INDEX; + u->auth_cookie_in_property = FALSE; + u->time_event = NULL; + u->ignore_latency_before = 0; + u->transport_usec = 0; + u->transport_usec_valid = FALSE; + u->remote_suspended = u->remote_corked = FALSE; + u->counter = u->counter_delta = 0; + + u->rtpoll = pa_rtpoll_new(); + pa_thread_mq_init(&u->thread_mq, m->core->mainloop, u->rtpoll); + + if (load_key(u, pa_modargs_get_value(ma, "cookie", NULL)) < 0) + goto fail; + + if (!(u->server_name = pa_xstrdup(pa_modargs_get_value(ma, "server", NULL)))) { + pa_log("No server specified."); + goto fail; + } + + ss = m->core->default_sample_spec; + if (pa_modargs_get_sample_spec_and_channel_map(ma, &ss, &map, PA_CHANNEL_MAP_DEFAULT) < 0) { + pa_log("Invalid sample format specification"); + goto fail; + } + + if (!(u->client = pa_socket_client_new_string(m->core->mainloop, u->server_name, PA_NATIVE_DEFAULT_PORT))) { + pa_log("Failed to connect to server '%s'", u->server_name); + goto fail; + } + + pa_socket_client_set_callback(u->client, on_connection, u); + +#ifdef TUNNEL_SINK + + if (!(dn = pa_xstrdup(pa_modargs_get_value(ma, "sink_name", NULL)))) + dn = pa_sprintf_malloc("tunnel.%s", u->server_name); + + pa_sink_new_data_init(&data); + data.driver = __FILE__; + data.module = m; + data.namereg_fail = TRUE; + pa_sink_new_data_set_name(&data, dn); + pa_sink_new_data_set_sample_spec(&data, &ss); + pa_sink_new_data_set_channel_map(&data, &map); + pa_proplist_setf(data.proplist, PA_PROP_DEVICE_DESCRIPTION, "%s%s%s", pa_strempty(u->sink_name), u->sink_name ? " on " : "", u->server_name); + pa_proplist_sets(data.proplist, "tunnel.remote.server", u->server_name); + if (u->sink_name) + pa_proplist_sets(data.proplist, "tunnel.remote.sink", u->sink_name); + + u->sink = pa_sink_new(m->core, &data, PA_SINK_NETWORK|PA_SINK_LATENCY|PA_SINK_HW_VOLUME_CTRL); + pa_sink_new_data_done(&data); + + if (!u->sink) { + pa_log("Failed to create sink."); + goto fail; + } + + u->sink->parent.process_msg = sink_process_msg; + u->sink->userdata = u; + u->sink->set_state = sink_set_state; + u->sink->set_volume = sink_set_volume; + u->sink->set_mute = sink_set_mute; + + u->sink->refresh_volume = u->sink->refresh_muted = FALSE; + + pa_sink_set_latency_range(u->sink, MIN_NETWORK_LATENCY_USEC, 0); + + pa_sink_set_asyncmsgq(u->sink, u->thread_mq.inq); + pa_sink_set_rtpoll(u->sink, u->rtpoll); + +#else + + if (!(dn = pa_xstrdup(pa_modargs_get_value(ma, "source_name", NULL)))) + dn = pa_sprintf_malloc("tunnel.%s", u->server_name); + + pa_source_new_data_init(&data); + data.driver = __FILE__; + data.module = m; + data.namereg_fail = TRUE; + pa_source_new_data_set_name(&data, dn); + pa_source_new_data_set_sample_spec(&data, &ss); + pa_source_new_data_set_channel_map(&data, &map); + pa_proplist_setf(data.proplist, PA_PROP_DEVICE_DESCRIPTION, "%s%s%s", pa_strempty(u->source_name), u->source_name ? " on " : "", u->server_name); + pa_proplist_sets(data.proplist, "tunnel.remote.server", u->server_name); + if (u->source_name) + pa_proplist_sets(data.proplist, "tunnel.remote.source", u->source_name); + + u->source = pa_source_new(m->core, &data, PA_SOURCE_NETWORK|PA_SOURCE_LATENCY); + pa_source_new_data_done(&data); + + if (!u->source) { + pa_log("Failed to create source."); + goto fail; + } + + u->source->parent.process_msg = source_process_msg; + u->source->set_state = source_set_state; + u->source->userdata = u; + + pa_source_set_latency_range(u->source, MIN_NETWORK_LATENCY_USEC, 0); + + pa_source_set_asyncmsgq(u->source, u->thread_mq.inq); + pa_source_set_rtpoll(u->source, u->rtpoll); +#endif + + pa_xfree(dn); + + u->time_event = NULL; + + u->maxlength = 0; +#ifdef TUNNEL_SINK + u->tlength = u->minreq = u->prebuf = 0; +#else + u->fragsize = 0; +#endif + + pa_smoother_set_time_offset(u->smoother, pa_rtclock_usec()); + + if (!(u->thread = pa_thread_new(thread_func, u))) { + pa_log("Failed to create thread."); + goto fail; + } + +#ifdef TUNNEL_SINK + pa_sink_put(u->sink); +#else + pa_source_put(u->source); +#endif + + pa_modargs_free(ma); + + return 0; + +fail: + pa__done(m); + + if (ma) + pa_modargs_free(ma); + + pa_xfree(dn); + + return -1; +} + +void pa__done(pa_module*m) { + struct userdata* u; + + pa_assert(m); + + if (!(u = m->userdata)) + return; + +#ifdef TUNNEL_SINK + if (u->sink) + pa_sink_unlink(u->sink); +#else + if (u->source) + pa_source_unlink(u->source); +#endif + + if (u->thread) { + pa_asyncmsgq_send(u->thread_mq.inq, NULL, PA_MESSAGE_SHUTDOWN, NULL, 0, NULL); + pa_thread_free(u->thread); + } + + pa_thread_mq_done(&u->thread_mq); + +#ifdef TUNNEL_SINK + if (u->sink) + pa_sink_unref(u->sink); +#else + if (u->source) + pa_source_unref(u->source); +#endif + + if (u->rtpoll) + pa_rtpoll_free(u->rtpoll); + + if (u->pstream) { + pa_pstream_unlink(u->pstream); + pa_pstream_unref(u->pstream); + } + + if (u->pdispatch) + pa_pdispatch_unref(u->pdispatch); + + if (u->client) + pa_socket_client_unref(u->client); + + if (u->auth_cookie_in_property) + pa_authkey_prop_unref(m->core, PA_NATIVE_COOKIE_PROPERTY_NAME); + + if (u->smoother) + pa_smoother_free(u->smoother); + + if (u->time_event) + u->core->mainloop->time_free(u->time_event); + +#ifdef TUNNEL_SINK + pa_xfree(u->sink_name); +#else + pa_xfree(u->source_name); +#endif + pa_xfree(u->server_name); + + pa_xfree(u->device_description); + pa_xfree(u->server_fqdn); + pa_xfree(u->user_name); + + pa_xfree(u); +} |