diff options
Diffstat (limited to 'src/modules/module-loopback.c')
| -rw-r--r-- | src/modules/module-loopback.c | 783 |
1 files changed, 783 insertions, 0 deletions
diff --git a/src/modules/module-loopback.c b/src/modules/module-loopback.c new file mode 100644 index 00000000..d9edbac0 --- /dev/null +++ b/src/modules/module-loopback.c @@ -0,0 +1,783 @@ +/*** + This file is part of PulseAudio. + + Copyright 2009 Intel Corporation + Contributor: Pierre-Louis Bossart <pierre-louis.bossart@intel.com> + + 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 2.1 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 <stdio.h> +#include <math.h> + +#include <pulse/xmalloc.h> + +#include <pulsecore/sink-input.h> +#include <pulsecore/module.h> +#include <pulsecore/modargs.h> +#include <pulsecore/namereg.h> +#include <pulsecore/log.h> +#include <pulsecore/core-util.h> + +#include <pulse/rtclock.h> +#include <pulse/timeval.h> + +#include "module-loopback-symdef.h" + +PA_MODULE_AUTHOR("Pierre-Louis Bossart"); +PA_MODULE_DESCRIPTION("Loopback from source to sink"); +PA_MODULE_VERSION(PACKAGE_VERSION); +PA_MODULE_LOAD_ONCE(FALSE); +PA_MODULE_USAGE( + "source=<source to connect to> " + "sink=<sink to connect to> " + "adjust_time=<how often to readjust rates in s> " + "latency_msec=<latency in ms> " + "format=<sample format> " + "rate=<sample rate> " + "channels=<number of channels> " + "channel_map=<channel map>"); + +#define DEFAULT_LATENCY_MSEC 200 + +#define MEMBLOCKQ_MAXLENGTH (1024*1024*16) + +#define DEFAULT_ADJUST_TIME_USEC (10*PA_USEC_PER_SEC) + +struct userdata { + pa_core *core; + pa_module *module; + + pa_sink_input *sink_input; + pa_source_output *source_output; + + pa_asyncmsgq *asyncmsgq; + pa_memblockq *memblockq; + + pa_rtpoll_item *rtpoll_item_read, *rtpoll_item_write; + + pa_time_event *time_event; + pa_usec_t adjust_time; + + int64_t recv_counter; + int64_t send_counter; + + size_t skip; + pa_usec_t latency; + + pa_bool_t in_pop; + size_t min_memblockq_length; + + struct { + int64_t send_counter; + size_t source_output_buffer; + pa_usec_t source_latency; + + int64_t recv_counter; + size_t sink_input_buffer; + pa_usec_t sink_latency; + + size_t min_memblockq_length; + size_t max_request; + } latency_snapshot; +}; + +static const char* const valid_modargs[] = { + "source", + "sink", + "latency", + "format", + "rate", + "channels", + "channel_map", + NULL, +}; + +enum { + SINK_INPUT_MESSAGE_POST = PA_SINK_INPUT_MESSAGE_MAX, + SINK_INPUT_MESSAGE_REWIND, + SINK_INPUT_MESSAGE_LATENCY_SNAPSHOT, + SINK_INPUT_MESSAGE_MAX_REQUEST_CHANGED +}; + +enum { + SOURCE_OUTPUT_MESSAGE_LATENCY_SNAPSHOT +}; + +/* Called from main context */ +static void teardown(struct userdata *u) { + pa_assert(u); + pa_assert_ctl_context(); + + if (u->sink_input) + pa_sink_input_unlink(u->sink_input); + + if (u->source_output) + pa_source_output_unlink(u->source_output); + + if (u->sink_input) { + pa_sink_input_unref(u->sink_input); + u->sink_input = NULL; + } + + if (u->source_output) { + pa_source_output_unref(u->source_output); + u->source_output = NULL; + } +} + +/* Called from main context */ +static void adjust_rates(struct userdata *u) { + size_t buffer, fs; + uint32_t old_rate, base_rate, new_rate; + pa_usec_t buffer_latency; + + pa_assert(u); + pa_assert_ctl_context(); + + pa_asyncmsgq_send(u->source_output->source->asyncmsgq, PA_MSGOBJECT(u->source_output), SOURCE_OUTPUT_MESSAGE_LATENCY_SNAPSHOT, NULL, 0, NULL); + pa_asyncmsgq_send(u->sink_input->sink->asyncmsgq, PA_MSGOBJECT(u->sink_input), SINK_INPUT_MESSAGE_LATENCY_SNAPSHOT, NULL, 0, NULL); + + buffer = + u->latency_snapshot.sink_input_buffer + + u->latency_snapshot.source_output_buffer; + + if (u->latency_snapshot.recv_counter <= u->latency_snapshot.send_counter) + buffer += (size_t) (u->latency_snapshot.send_counter - u->latency_snapshot.recv_counter); + else + buffer += PA_CLIP_SUB(buffer, (size_t) (u->latency_snapshot.recv_counter - u->latency_snapshot.send_counter)); + + buffer_latency = pa_bytes_to_usec(buffer, &u->sink_input->sample_spec); + + pa_log_info("Loopback overall latency is %0.2f ms + %0.2f ms + %0.2f ms = %0.2f ms", + (double) u->latency_snapshot.sink_latency / PA_USEC_PER_MSEC, + (double) buffer_latency / PA_USEC_PER_MSEC, + (double) u->latency_snapshot.source_latency / PA_USEC_PER_MSEC, + ((double) u->latency_snapshot.sink_latency + buffer_latency + u->latency_snapshot.source_latency) / PA_USEC_PER_MSEC); + + pa_log_info("Should buffer %lu bytes, buffered at minimum %lu bytes", + u->latency_snapshot.max_request*2, + u->latency_snapshot.min_memblockq_length); + + fs = pa_frame_size(&u->sink_input->sample_spec); + old_rate = u->sink_input->sample_spec.rate; + base_rate = u->source_output->sample_spec.rate; + + if (u->latency_snapshot.min_memblockq_length < u->latency_snapshot.max_request*2) + new_rate = base_rate - (((u->latency_snapshot.max_request*2 - u->latency_snapshot.min_memblockq_length) / fs) *PA_USEC_PER_SEC)/u->adjust_time; + else + new_rate = base_rate + (((u->latency_snapshot.min_memblockq_length - u->latency_snapshot.max_request*2) / fs) *PA_USEC_PER_SEC)/u->adjust_time; + + pa_log_info("Old rate %lu Hz, new rate %lu Hz", (unsigned long) old_rate, (unsigned long) new_rate); + + pa_sink_input_set_rate(u->sink_input, new_rate); + + pa_core_rttime_restart(u->core, u->time_event, pa_rtclock_now() + u->adjust_time); +} + +/* Called from main context */ +static void time_callback(pa_mainloop_api *a, pa_time_event *e, const struct timeval *t, void *userdata) { + struct userdata *u = userdata; + + pa_assert(u); + pa_assert(a); + pa_assert(u->time_event == e); + + adjust_rates(u); +} + +/* Called from input thread context */ +static void source_output_push_cb(pa_source_output *o, const pa_memchunk *chunk) { + struct userdata *u; + pa_memchunk copy; + + pa_source_output_assert_ref(o); + pa_source_output_assert_io_context(o); + pa_assert_se(u = o->userdata); + + if (u->skip > chunk->length) { + u->skip -= chunk->length; + return; + } + + if (u->skip > 0) { + copy = *chunk; + copy.index += u->skip; + copy.length -= u->skip; + u->skip = 0; + + chunk = © + } + + pa_asyncmsgq_post(u->asyncmsgq, PA_MSGOBJECT(u->sink_input), SINK_INPUT_MESSAGE_POST, NULL, 0, chunk, NULL); + u->send_counter += (int64_t) chunk->length; +} + +/* Called from input thread context */ +static void source_output_process_rewind_cb(pa_source_output *o, size_t nbytes) { + struct userdata *u; + + pa_source_output_assert_ref(o); + pa_source_output_assert_io_context(o); + pa_assert_se(u = o->userdata); + + pa_asyncmsgq_post(u->asyncmsgq, PA_MSGOBJECT(u->sink_input), SINK_INPUT_MESSAGE_REWIND, NULL, (int64_t) nbytes, NULL, NULL); + u->send_counter -= (int64_t) nbytes; +} + +/* Called from output thread context */ +static int source_output_process_msg_cb(pa_msgobject *obj, int code, void *data, int64_t offset, pa_memchunk *chunk) { + struct userdata *u = PA_SOURCE_OUTPUT(obj)->userdata; + + switch (code) { + + case SOURCE_OUTPUT_MESSAGE_LATENCY_SNAPSHOT: { + size_t length; + + length = pa_memblockq_get_length(u->source_output->thread_info.delay_memblockq); + + u->latency_snapshot.send_counter = u->send_counter; + u->latency_snapshot.source_output_buffer = u->source_output->thread_info.resampler ? pa_resampler_result(u->source_output->thread_info.resampler, length) : length; + u->latency_snapshot.source_latency = pa_source_get_latency_within_thread(u->source_output->source); + + return 0; + } + } + + return pa_source_output_process_msg(obj, code, data, offset, chunk); +} + +/* Called from output thread context */ +static void source_output_attach_cb(pa_source_output *o) { + struct userdata *u; + + pa_source_output_assert_ref(o); + pa_source_output_assert_io_context(o); + pa_assert_se(u = o->userdata); + + u->rtpoll_item_write = pa_rtpoll_item_new_asyncmsgq_write( + o->source->thread_info.rtpoll, + PA_RTPOLL_LATE, + u->asyncmsgq); +} + +/* Called from output thread context */ +static void source_output_detach_cb(pa_source_output *o) { + struct userdata *u; + + pa_source_output_assert_ref(o); + pa_source_output_assert_io_context(o); + pa_assert_se(u = o->userdata); + + if (u->rtpoll_item_write) { + pa_rtpoll_item_free(u->rtpoll_item_write); + u->rtpoll_item_write = NULL; + } +} + +/* Called from output thread context */ +static void source_output_state_change_cb(pa_source_output *o, pa_source_output_state_t state) { + struct userdata *u; + + pa_source_output_assert_ref(o); + pa_source_output_assert_io_context(o); + pa_assert_se(u = o->userdata); + + if (PA_SOURCE_OUTPUT_IS_LINKED(state) && o->thread_info.state == PA_SOURCE_OUTPUT_INIT) { + + u->skip = pa_usec_to_bytes(PA_CLIP_SUB(pa_source_get_latency_within_thread(o->source), + u->latency), + &o->sample_spec); + + pa_log_info("Skipping %lu bytes", (unsigned long) u->skip); + } +} + +/* Called from main thread */ +static void source_output_kill_cb(pa_source_output *o) { + struct userdata *u; + + pa_source_output_assert_ref(o); + pa_assert_ctl_context(); + pa_assert_se(u = o->userdata); + + teardown(u); + pa_module_unload_request(u->module, TRUE); +} + +/* Called from main thread */ +static pa_bool_t source_output_may_move_to_cb(pa_source_output *o, pa_source *dest) { + struct userdata *u; + + pa_source_output_assert_ref(o); + pa_assert_ctl_context(); + pa_assert_se(u = o->userdata); + + return dest != u->sink_input->sink->monitor_source; +} + +/* Called from main thread */ +static void source_output_moving_cb(pa_source_output *o, pa_source *dest) { + pa_proplist *p; + const char *n; + struct userdata *u; + + pa_source_output_assert_ref(o); + pa_assert_ctl_context(); + pa_assert_se(u = o->userdata); + + p = pa_proplist_new(); + pa_proplist_setf(p, PA_PROP_MEDIA_NAME, "Loopback of %s", pa_strnull(pa_proplist_gets(dest->proplist, PA_PROP_DEVICE_DESCRIPTION))); + + if ((n = pa_proplist_gets(dest->proplist, PA_PROP_DEVICE_ICON_NAME))) + pa_proplist_sets(p, PA_PROP_MEDIA_ICON_NAME, n); + + pa_sink_input_update_proplist(u->sink_input, PA_UPDATE_REPLACE, p); + pa_proplist_free(p); +} + +/* Called from output thread context */ +static void update_min_memblockq_length(struct userdata *u) { + size_t length; + + pa_assert(u); + pa_sink_input_assert_io_context(u->sink_input); + + length = pa_memblockq_get_length(u->memblockq); + + if (u->min_memblockq_length == (size_t) -1 || + length < u->min_memblockq_length) + u->min_memblockq_length = length; +} + +/* Called from output thread context */ +static int sink_input_pop_cb(pa_sink_input *i, size_t nbytes, pa_memchunk *chunk) { + struct userdata *u; + + pa_sink_input_assert_ref(i); + pa_sink_input_assert_io_context(i); + pa_assert_se(u = i->userdata); + pa_assert(chunk); + + u->in_pop = TRUE; + while (pa_asyncmsgq_process_one(u->asyncmsgq) > 0) + ; + u->in_pop = FALSE; + + if (pa_memblockq_peek(u->memblockq, chunk) < 0) { + pa_log_info("Coud not peek into queue"); + return -1; + } + + chunk->length = PA_MIN(chunk->length, nbytes); + pa_memblockq_drop(u->memblockq, chunk->length); + + update_min_memblockq_length(u); + + return 0; +} + +/* Called from output thread context */ +static void sink_input_process_rewind_cb(pa_sink_input *i, size_t nbytes) { + struct userdata *u; + + pa_sink_input_assert_ref(i); + pa_sink_input_assert_io_context(i); + pa_assert_se(u = i->userdata); + + pa_memblockq_rewind(u->memblockq, nbytes); +} + +/* Called from output thread context */ +static int sink_input_process_msg_cb(pa_msgobject *obj, int code, void *data, int64_t offset, pa_memchunk *chunk) { + struct userdata *u = PA_SINK_INPUT(obj)->userdata; + + switch (code) { + + case PA_SINK_INPUT_MESSAGE_GET_LATENCY: { + pa_usec_t *r = data; + + pa_sink_input_assert_io_context(u->sink_input); + + *r = pa_bytes_to_usec(pa_memblockq_get_length(u->memblockq), &u->sink_input->sample_spec); + + /* Fall through, the default handler will add in the extra + * latency added by the resampler */ + break; + } + + case SINK_INPUT_MESSAGE_POST: + + pa_sink_input_assert_io_context(u->sink_input); + + if (PA_SINK_IS_OPENED(u->sink_input->sink->thread_info.state)) + pa_memblockq_push_align(u->memblockq, chunk); + else + pa_memblockq_flush_write(u->memblockq); + + update_min_memblockq_length(u); + + /* Is this the end of an underrun? Then let's start things + * right-away */ + if (!u->in_pop && + u->sink_input->thread_info.underrun_for > 0 && + pa_memblockq_is_readable(u->memblockq)) { + + pa_log_debug("Requesting rewind due to end of underrun."); + pa_sink_input_request_rewind(u->sink_input, + (size_t) (u->sink_input->thread_info.underrun_for == (size_t) -1 ? 0 : u->sink_input->thread_info.underrun_for), + FALSE, TRUE, FALSE); + } + + u->recv_counter += (int64_t) chunk->length; + + return 0; + + case SINK_INPUT_MESSAGE_REWIND: + + pa_sink_input_assert_io_context(u->sink_input); + + if (PA_SINK_IS_OPENED(u->sink_input->sink->thread_info.state)) + pa_memblockq_seek(u->memblockq, -offset, PA_SEEK_RELATIVE, TRUE); + else + pa_memblockq_flush_write(u->memblockq); + + u->recv_counter -= offset; + + update_min_memblockq_length(u); + + return 0; + + case SINK_INPUT_MESSAGE_LATENCY_SNAPSHOT: { + size_t length; + + update_min_memblockq_length(u); + + length = pa_memblockq_get_length(u->sink_input->thread_info.render_memblockq); + + u->latency_snapshot.recv_counter = u->recv_counter; + u->latency_snapshot.sink_input_buffer = + pa_memblockq_get_length(u->memblockq) + + (u->sink_input->thread_info.resampler ? pa_resampler_request(u->sink_input->thread_info.resampler, length) : length); + u->latency_snapshot.sink_latency = pa_sink_get_latency_within_thread(u->sink_input->sink); + + u->latency_snapshot.max_request = pa_sink_input_get_max_request(u->sink_input); + + u->latency_snapshot.min_memblockq_length = u->min_memblockq_length; + u->min_memblockq_length = (size_t) -1; + + return 0; + } + + case SINK_INPUT_MESSAGE_MAX_REQUEST_CHANGED: { + /* This message is sent from the IO thread to the main + * thread! So don't be confused. All the user cases above + * are executed in thread context, but this one is not! */ + + pa_assert_ctl_context(); + + adjust_rates(u); + return 0; + } + } + + return pa_sink_input_process_msg(obj, code, data, offset, chunk); +} + +/* Called from output thread context */ +static void sink_input_attach_cb(pa_sink_input *i) { + struct userdata *u; + + pa_sink_input_assert_ref(i); + pa_sink_input_assert_io_context(i); + pa_assert_se(u = i->userdata); + + u->rtpoll_item_read = pa_rtpoll_item_new_asyncmsgq_read( + i->sink->thread_info.rtpoll, + PA_RTPOLL_LATE, + u->asyncmsgq); + + pa_memblockq_set_prebuf(u->memblockq, pa_sink_input_get_max_request(i)*2); + pa_memblockq_set_maxrewind(u->memblockq, pa_sink_input_get_max_rewind(i)); + + u->min_memblockq_length = (size_t) -1; +} + +/* Called from output thread context */ +static void sink_input_detach_cb(pa_sink_input *i) { + struct userdata *u; + + pa_sink_input_assert_ref(i); + pa_sink_input_assert_io_context(i); + pa_assert_se(u = i->userdata); + + if (u->rtpoll_item_read) { + pa_rtpoll_item_free(u->rtpoll_item_read); + u->rtpoll_item_read = NULL; + } +} + +/* Called from output thread context */ +static void sink_input_update_max_rewind_cb(pa_sink_input *i, size_t nbytes) { + struct userdata *u; + + pa_sink_input_assert_ref(i); + pa_sink_input_assert_io_context(i); + pa_assert_se(u = i->userdata); + + pa_memblockq_set_maxrewind(u->memblockq, nbytes); +} + +/* Called from output thread context */ +static void sink_input_update_max_request_cb(pa_sink_input *i, size_t nbytes) { + struct userdata *u; + + pa_sink_input_assert_ref(i); + pa_sink_input_assert_io_context(i); + pa_assert_se(u = i->userdata); + + pa_memblockq_set_prebuf(u->memblockq, nbytes*2); + pa_log_info("Max request changed"); + pa_asyncmsgq_post(pa_thread_mq_get()->outq, PA_MSGOBJECT(u->sink_input), SINK_INPUT_MESSAGE_MAX_REQUEST_CHANGED, NULL, 0, NULL, NULL); +} + +/* Called from main thread */ +static void sink_input_kill_cb(pa_sink_input *i) { + struct userdata *u; + + pa_sink_input_assert_ref(i); + pa_assert_ctl_context(); + pa_assert_se(u = i->userdata); + + teardown(u); + pa_module_unload_request(u->module, TRUE); +} + +/* Called from main thread */ +static void sink_input_moving_cb(pa_sink_input *i, pa_sink *dest) { + struct userdata *u; + pa_proplist *p; + const char *n; + + pa_sink_input_assert_ref(i); + pa_assert_ctl_context(); + pa_assert_se(u = i->userdata); + + p = pa_proplist_new(); + pa_proplist_setf(p, PA_PROP_MEDIA_NAME, "Loopback to %s", pa_strnull(pa_proplist_gets(dest->proplist, PA_PROP_DEVICE_DESCRIPTION))); + + if ((n = pa_proplist_gets(dest->proplist, PA_PROP_DEVICE_ICON_NAME))) + pa_proplist_sets(p, PA_PROP_MEDIA_ICON_NAME, n); + + pa_source_output_update_proplist(u->source_output, PA_UPDATE_REPLACE, p); + pa_proplist_free(p); +} + +/* Called from main thread */ +static pa_bool_t sink_input_may_move_to_cb(pa_sink_input *i, pa_sink *dest) { + struct userdata *u; + + pa_sink_input_assert_ref(i); + pa_assert_ctl_context(); + pa_assert_se(u = i->userdata); + + if (!u->source_output->source->monitor_of) + return TRUE; + + return dest != u->source_output->source->monitor_of; +} + +int pa__init(pa_module *m) { + pa_modargs *ma = NULL; + struct userdata *u; + pa_sink *sink; + pa_sink_input_new_data sink_input_data; + pa_source *source; + pa_source_output_new_data source_output_data; + uint32_t latency_msec; + pa_sample_spec ss; + pa_channel_map map; + pa_memchunk silence; + uint32_t adjust_time_sec; + const char *n; + + pa_assert(m); + + if (!(ma = pa_modargs_new(m->argument, valid_modargs))) { + pa_log("Failed to parse module arguments"); + goto fail; + } + + if (!(source = pa_namereg_get(m->core, pa_modargs_get_value(ma, "source", NULL), PA_NAMEREG_SOURCE))) { + pa_log("No such source."); + goto fail; + } + + if (!(sink = pa_namereg_get(m->core, pa_modargs_get_value(ma, "sink", NULL), PA_NAMEREG_SINK))) { + pa_log("No such sink."); + goto fail; + } + + ss = sink->sample_spec; + map = sink->channel_map; + if (pa_modargs_get_sample_spec_and_channel_map(ma, &ss, &map, PA_CHANNEL_MAP_DEFAULT) < 0) { + pa_log("Invalid sample format specification or channel map"); + goto fail; + } + + latency_msec = DEFAULT_LATENCY_MSEC; + if (pa_modargs_get_value_u32(ma, "latency_msec", &latency_msec) < 0 || latency_msec < 1 || latency_msec > 2000) { + pa_log("Invalid latency specification"); + goto fail; + } + + m->userdata = u = pa_xnew0(struct userdata, 1); + u->core = m->core; + u->module = m; + u->latency = (pa_usec_t) latency_msec * PA_USEC_PER_MSEC; + + adjust_time_sec = DEFAULT_ADJUST_TIME_USEC / PA_USEC_PER_SEC; + if (pa_modargs_get_value_u32(ma, "adjust_time", &adjust_time_sec) < 0) { + pa_log("Failed to parse adjust_time value"); + goto fail; + } + + if (adjust_time_sec != DEFAULT_ADJUST_TIME_USEC / PA_USEC_PER_SEC) + u->adjust_time = adjust_time_sec * PA_USEC_PER_SEC; + else + u->adjust_time = DEFAULT_ADJUST_TIME_USEC; + + pa_sink_input_new_data_init(&sink_input_data); + sink_input_data.driver = __FILE__; + sink_input_data.module = m; + sink_input_data.sink = sink; + + pa_proplist_setf(sink_input_data.proplist, PA_PROP_MEDIA_NAME, "Loopback of %s", + pa_strnull(pa_proplist_gets(source->proplist, PA_PROP_DEVICE_DESCRIPTION))); + if ((n = pa_proplist_gets(source->proplist, PA_PROP_DEVICE_ICON_NAME))) + pa_proplist_sets(sink_input_data.proplist, PA_PROP_MEDIA_ICON_NAME, n); + pa_proplist_sets(sink_input_data.proplist, PA_PROP_MEDIA_ROLE, "abstract"); + pa_sink_input_new_data_set_sample_spec(&sink_input_data, &ss); + pa_sink_input_new_data_set_channel_map(&sink_input_data, &map); + + pa_sink_input_new(&u->sink_input, m->core, &sink_input_data, PA_SINK_INPUT_VARIABLE_RATE); + pa_sink_input_new_data_done(&sink_input_data); + + if (!u->sink_input) + goto fail; + + u->sink_input->parent.process_msg = sink_input_process_msg_cb; + u->sink_input->pop = sink_input_pop_cb; + u->sink_input->process_rewind = sink_input_process_rewind_cb; + u->sink_input->kill = sink_input_kill_cb; + u->sink_input->attach = sink_input_attach_cb; + u->sink_input->detach = sink_input_detach_cb; + u->sink_input->update_max_rewind = sink_input_update_max_rewind_cb; + u->sink_input->update_max_request = sink_input_update_max_request_cb; + u->sink_input->may_move_to = sink_input_may_move_to_cb; + u->sink_input->moving = sink_input_moving_cb; + u->sink_input->userdata = u; + + pa_sink_input_set_requested_latency(u->sink_input, u->latency/3); + + pa_source_output_new_data_init(&source_output_data); + source_output_data.driver = __FILE__; + source_output_data.module = m; + source_output_data.source = source; + pa_proplist_setf(source_output_data.proplist, PA_PROP_MEDIA_NAME, "Loopback to %s", + pa_strnull(pa_proplist_gets(sink->proplist, PA_PROP_DEVICE_DESCRIPTION))); + if ((n = pa_proplist_gets(sink->proplist, PA_PROP_DEVICE_ICON_NAME))) + pa_proplist_sets(source_output_data.proplist, PA_PROP_MEDIA_ICON_NAME, n); + pa_proplist_sets(source_output_data.proplist, PA_PROP_MEDIA_ROLE, "abstract"); + pa_source_output_new_data_set_sample_spec(&source_output_data, &ss); + pa_sink_input_new_data_set_channel_map(&sink_input_data, &map); + + pa_source_output_new(&u->source_output, m->core, &source_output_data, 0); + pa_source_output_new_data_done(&source_output_data); + + if (!u->source_output) + goto fail; + + u->source_output->parent.process_msg = source_output_process_msg_cb; + u->source_output->push = source_output_push_cb; + u->source_output->process_rewind = source_output_process_rewind_cb; + u->source_output->kill = source_output_kill_cb; + u->source_output->attach = source_output_attach_cb; + u->source_output->detach = source_output_detach_cb; + u->source_output->state_change = source_output_state_change_cb; + u->source_output->may_move_to = source_output_may_move_to_cb; + u->source_output->moving = source_output_moving_cb; + u->source_output->userdata = u; + + pa_source_output_set_requested_latency(u->source_output, u->latency/3); + + pa_sink_input_get_silence(u->sink_input, &silence); + u->memblockq = pa_memblockq_new( + 0, /* idx */ + MEMBLOCKQ_MAXLENGTH, /* maxlength */ + MEMBLOCKQ_MAXLENGTH, /* tlength */ + pa_frame_size(&ss), /* base */ + 0, /* prebuf */ + 0, /* minreq */ + 0, /* maxrewind */ + &silence); /* silence frame */ + pa_memblock_unref(silence.memblock); + + u->asyncmsgq = pa_asyncmsgq_new(0); + + pa_sink_input_put(u->sink_input); + pa_source_output_put(u->source_output); + + if (u->adjust_time > 0) + u->time_event = pa_core_rttime_new(m->core, pa_rtclock_now() + u->adjust_time, time_callback, u); + + pa_modargs_free(ma); + return 0; + +fail: + if (ma) + pa_modargs_free(ma); + + pa__done(m); + + return -1; +} + +void pa__done(pa_module*m) { + struct userdata *u; + + pa_assert(m); + + if (!(u = m->userdata)) + return; + + teardown(u); + + if (u->memblockq) + pa_memblockq_free(u->memblockq); + + if (u->asyncmsgq) + pa_asyncmsgq_unref(u->asyncmsgq); + + if (u->time_event) + u->core->mainloop->time_free(u->time_event); + + pa_xfree(u); +} |