As per discussions with FordPrefect. tanuk, theBear, ohsix, etc. on #pulseaudio.
This is an initial, working version. Testing and review are most welcome, plus thoughts on a better lp filter. -- #---------------------------------------------------------------------------# Justin Chudgar | 530-921-0738 | 5040 Saddlehorn Rd, Weed, CA 96094 #---------------------------------------------------------------------------#
subject: patch to add module-lfe-lp for lowpass filtered lfe channel output diff --git a/src/Makefile.am b/src/Makefile.am index 8aacf92..3ceb236 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -1076,6 +1076,7 @@ modlibexec_LTLIBRARIES += \ module-remap-sink.la \ module-ladspa-sink.la \ module-tunnel-sink.la \ + module-lfe-lp.la \ module-tunnel-source.la \ module-position-event-sounds.la \ module-augment-properties.la \ @@ -1088,7 +1089,7 @@ modlibexec_LTLIBRARIES += \ module-switch-on-port-available.la \ module-filter-apply.la \ module-filter-heuristics.la \ - module-role-ducking.la + module-role-ducking.la if HAVE_ESOUND modlibexec_LTLIBRARIES += \ @@ -1340,6 +1341,7 @@ SYMDEF_FILES = \ module-combine-sink-symdef.h \ module-remap-sink-symdef.h \ module-ladspa-sink-symdef.h \ + module-lfe-lp-symdef.h \ module-equalizer-sink-symdef.h \ module-match-symdef.h \ module-tunnel-sink-symdef.h \ @@ -1599,6 +1601,10 @@ module_ladspa_sink_la_CFLAGS += $(DBUS_CFLAGS) module_ladspa_sink_la_LIBADD += $(DBUS_LIBS) endif +module_lfe_lp_la_SOURCES = modules/module-lfe-lp.c +module_lfe_lp_la_LDFLAGS = $(MODULE_LDFLAGS) +module_lfe_lp_la_LIBADD = $(MODULE_LIBADD) $(LIBLTDL) + module_equalizer_sink_la_SOURCES = modules/module-equalizer-sink.c module_equalizer_sink_la_CFLAGS = $(AM_CFLAGS) $(SERVER_CFLAGS) $(DBUS_CFLAGS) $(FFTW_CFLAGS) module_equalizer_sink_la_LDFLAGS = $(MODULE_LDFLAGS) diff --git a/src/modules/module-lfe-lp.c b/src/modules/module-lfe-lp.c new file mode 100644 index 0000000..2c2db73 --- /dev/null +++ b/src/modules/module-lfe-lp.c @@ -0,0 +1,768 @@ +/*** + This file is part of PulseAudio. + + Copyright 2013 Justin Chudgar <[email protected]> + + 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 <pulse/gccmacro.h> +#include <pulse/xmalloc.h> +#include <pulse/def.h> + +#include <pulsecore/i18n.h> +#include <pulsecore/namereg.h> +#include <pulsecore/sink.h> +#include <pulsecore/module.h> +#include <pulsecore/core-util.h> +#include <pulsecore/modargs.h> +#include <pulsecore/log.h> +#include <pulsecore/rtpoll.h> +#include <pulsecore/sample-util.h> +#include <pulsecore/ltdl-helper.h> + +#include "module-lfe-lp-symdef.h" + +PA_MODULE_AUTHOR("Justin Chudgar"); +PA_MODULE_DESCRIPTION(_("LFE LP Filter")); +PA_MODULE_VERSION(PACKAGE_VERSION); +PA_MODULE_LOAD_ONCE(FALSE); +PA_MODULE_USAGE( + _("sink_name=<name for the sink> " + "sink_properties=<properties for the sink> " + "lpfreq=low pass cutoff freq 50-500 Hz" + "master=<name of sink to filter> " + "rate=<sample rate> " + "channels=<number of channels> " + "channel_map=<channel map> " + "use_volume_sharing=<yes or no> " + "force_flat_volume=<yes or no> " + )); + +#define MEMBLOCKQ_MAXLENGTH (16*1024*1024) + +struct userdata { + pa_module *module; + pa_bool_t autoloaded; + pa_sink *sink; + pa_sink_input *sink_input; + pa_memblockq *memblockq; + pa_bool_t auto_desc; + pa_sample_spec sample_spec; + double lpfreq; + unsigned int lfe_index; + unsigned int center_index; + double hp_factor, lp_factor; + double prev_sample[PA_CHANNELS_MAX]; + double filtered[PA_CHANNELS_MAX]; + // TODO: debugging, remove me + FILE *lfe_lp_log; +}; + +static const char* const valid_modargs[] = { + "sink_name", + "sink_properties", + "lpfreq", + "master", + "rate", + "channels", + "channel_map", + "use_volume_sharing", + "force_flat_volume", + NULL +}; + +/* Called from I/O thread context */ +static int sink_process_msg_cb(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_GET_LATENCY: + /* The sink is _put() before the sink input is, so let's make sure + * we don't access it in that time. Also, the sink input is first + * shut down, the sink second. */ + if (!PA_SINK_IS_LINKED(u->sink->thread_info.state) || + !PA_SINK_INPUT_IS_LINKED(u->sink_input->thread_info.state)) { + *((pa_usec_t*) data) = 0; + return 0; + } + /* Get the latency of the master sink and add the latency internal + to our sink input on top */ + *((pa_usec_t*) data) = + pa_sink_get_latency_within_thread(u->sink_input->sink) + + pa_bytes_to_usec(pa_memblockq_get_length(u->sink_input->thread_info.render_memblockq), + &u->sink_input->sink->sample_spec); + return 0; + } + return pa_sink_process_msg(o, code, data, offset, chunk); +} + +/* Called from main context */ +static int sink_set_state_cb(pa_sink *s, pa_sink_state_t state) { + struct userdata *u; + + pa_sink_assert_ref(s); + pa_assert_se(u = s->userdata); + + if (!PA_SINK_IS_LINKED(state) || + !PA_SINK_INPUT_IS_LINKED(pa_sink_input_get_state(u->sink_input))) + return 0; + + pa_sink_input_cork(u->sink_input, state == PA_SINK_SUSPENDED); + return 0; +} + +/* Called from I/O thread context */ +static void sink_request_rewind_cb(pa_sink *s) { + struct userdata *u; + + pa_sink_assert_ref(s); + pa_assert_se(u = s->userdata); + + if (!PA_SINK_IS_LINKED(u->sink->thread_info.state) || + !PA_SINK_INPUT_IS_LINKED(u->sink_input->thread_info.state)) + return; + + /* Just hand this one over to the master sink */ + pa_sink_input_request_rewind(u->sink_input, + s->thread_info.rewind_nbytes + + pa_memblockq_get_length(u->memblockq), TRUE, FALSE, FALSE); +} + +/* Called from I/O thread context */ +static void sink_update_requested_latency_cb(pa_sink *s) { + struct userdata *u; + + pa_sink_assert_ref(s); + pa_assert_se(u = s->userdata); + + if (!PA_SINK_IS_LINKED(u->sink->thread_info.state) || + !PA_SINK_INPUT_IS_LINKED(u->sink_input->thread_info.state)) + return; + + /* Just hand this one over to the master sink */ + pa_sink_input_set_requested_latency_within_thread( + u->sink_input, + pa_sink_get_requested_latency_within_thread(s)); +} + +/* Called from main context */ +static void sink_set_volume_cb(pa_sink *s) { + struct userdata *u; + + pa_sink_assert_ref(s); + pa_assert_se(u = s->userdata); + + if (!PA_SINK_IS_LINKED(pa_sink_get_state(s)) || + !PA_SINK_INPUT_IS_LINKED(pa_sink_input_get_state(u->sink_input))) + return; + + pa_sink_input_set_volume(u->sink_input, &s->real_volume, s->save_volume, TRUE); +} + +/* Called from main context */ +static void sink_set_mute_cb(pa_sink *s) { + struct userdata *u; + + pa_sink_assert_ref(s); + pa_assert_se(u = s->userdata); + + if (!PA_SINK_IS_LINKED(pa_sink_get_state(s)) || + !PA_SINK_INPUT_IS_LINKED(pa_sink_input_get_state(u->sink_input))) + return; + + pa_sink_input_set_mute(u->sink_input, s->muted, s->save_muted); +} + +/** + * \fn sink_input_pop_cb + * \return int: What is the significance of the return value? + * \param sink_input + * \param nbytes + * \param chunk + * Called from I/O thread context + * Low pass filters the LFE channel and high pass filters the remaining channels. + */ +static int sink_input_pop_cb(pa_sink_input *sink_input, + size_t nbytes, + pa_memchunk *chunk) { + struct userdata *u; + float *src, *dst, *cur_sample, *cur_frame, *dst_frame, *dst_sample; + size_t framesize; + unsigned num_frames, frame_index, channel_index; + pa_memchunk tchunk; + pa_usec_t current_latency PA_GCC_UNUSED; + + pa_sink_input_assert_ref(sink_input); + pa_assert(chunk); + pa_assert_se(u = sink_input->userdata); + + /* Hmm, process any rewind request that might be queued up */ + pa_sink_process_rewind(u->sink, 0); + + /* (1) IF YOU NEED A FIXED BLOCK SIZE USE + * pa_memblockq_peek_fixed_size() HERE INSTEAD. NOTE THAT FILTERS + * WHICH CAN DEAL WITH DYNAMIC BLOCK SIZES ARE HIGHLY + * PREFERRED. */ + while (pa_memblockq_peek(u->memblockq, &tchunk) < 0) { + pa_memchunk nchunk; + pa_sink_render(u->sink, nbytes, &nchunk); + pa_memblockq_push(u->memblockq, &nchunk); + pa_memblock_unref(nchunk.memblock); + } + + /* (2) IF YOU NEED A FIXED BLOCK SIZE, THIS NEXT LINE IS NOT NECESSARY */ + tchunk.length = PA_MIN(nbytes, tchunk.length); + pa_assert(tchunk.length > 0); + //pa_log_debug ("JZ: %s[%d] tchunk.length=%d\n", __FILE__, __LINE__, tchunk.length); + + framesize = pa_frame_size(&sink_input->sample_spec); + //pa_log_debug ("JZ: %s[%d] framesize=%d", __FILE__, __LINE__, framesize); + num_frames = (unsigned) (tchunk.length / framesize); + //pa_log_debug ("JZ: %s[%d] num_frames=%d", __FILE__, __LINE__, num_frames); + + pa_assert(num_frames > 0); + + chunk->index = 0; + chunk->length = num_frames*framesize; + chunk->memblock = pa_memblock_new(sink_input->sink->core->mempool, chunk->length); + + pa_memblockq_drop(u->memblockq, chunk->length); + + src = pa_memblock_acquire_chunk(&tchunk); + dst = pa_memblock_acquire(chunk->memblock); + + /* (3) PUT YOUR CODE HERE TO DO SOMETHING WITH THE DATA */ + + for (frame_index = 0; frame_index < num_frames; frame_index++) { + cur_frame = src + frame_index * u->sample_spec.channels; + dst_frame = dst + frame_index * u->sample_spec.channels; + for (channel_index = 0; channel_index < u->sample_spec.channels; channel_index++) { + cur_sample = cur_frame + channel_index; + dst_sample = dst_frame + channel_index; + if (channel_index == u->lfe_index) { // low pass + u->filtered[channel_index] += (u->lp_factor * + ((double)*cur_sample - + u->filtered[channel_index])); + } else if (channel_index == u->center_index) { // high pass + u->filtered[channel_index] = (u->hp_factor * + (u->filtered[channel_index] + + (double)*cur_sample - + u->prev_sample[channel_index])); + u->prev_sample[channel_index] = (double)*cur_sample; + } else { + u->filtered[channel_index] = (double)*cur_sample; + u->prev_sample[channel_index] = (double)*cur_sample; + } + *dst_sample = (float)u->filtered[channel_index]; + /* TODO: debugging, remove me + fprintf (u->lfe_lp_log, + "%u,%+01.12f,%+01.12f\n", + channel_index, + u->filtered[channel_index], + (double)*cur_sample); + */ + } + } + + pa_memblock_release(tchunk.memblock); + pa_memblock_release(chunk->memblock); + + pa_memblock_unref(tchunk.memblock); + + /* (4) IF YOU NEED THE LATENCY FOR SOMETHING ACQUIRE IT LIKE THIS: */ + /* Get the latency of master and add the latency internal to our sink input*/ + current_latency = (pa_sink_get_latency_within_thread(sink_input->sink) + + pa_bytes_to_usec(pa_memblockq_get_length(sink_input->thread_info.render_memblockq), + &sink_input->sink->sample_spec) + ); + + return 0; +} + +/* Called from I/O thread context */ +static void sink_input_process_rewind_cb(pa_sink_input *i, size_t nbytes) { + struct userdata *u; + size_t amount = 0; + + pa_sink_input_assert_ref(i); + pa_assert_se(u = i->userdata); + + if (u->sink->thread_info.rewind_nbytes > 0) { + size_t max_rewrite; + + max_rewrite = nbytes + pa_memblockq_get_length(u->memblockq); + amount = PA_MIN(u->sink->thread_info.rewind_nbytes, max_rewrite); + u->sink->thread_info.rewind_nbytes = 0; + + if (amount > 0) { + pa_memblockq_seek(u->memblockq, - (int64_t) amount, PA_SEEK_RELATIVE, TRUE); + /* (5) PUT YOUR CODE HERE TO RESET YOUR FILTER */ + // TODO: Determine how to reset. + } + } + + pa_sink_process_rewind(u->sink, amount); + pa_memblockq_rewind(u->memblockq, nbytes); +} + +/* Called from I/O 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_assert_se(u = i->userdata); + /* FIXME: Too small max_rewind: + * https://bugs.freedesktop.org/show_bug.cgi?id=53709 */ + pa_memblockq_set_maxrewind(u->memblockq, nbytes); + pa_sink_set_max_rewind_within_thread(u->sink, nbytes); +} + +/* Called from I/O 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_assert_se(u = i->userdata); + /* (6) IF YOU NEED A FIXED BLOCK SIZE ROUND nbytes UP TO MULTIPLES + * OF IT HERE. THE PA_ROUND_UP MACRO IS USEFUL FOR THAT. */ + pa_sink_set_max_request_within_thread(u->sink, nbytes); +} + +/* Called from I/O thread context */ +static void sink_input_update_sink_latency_range_cb(pa_sink_input *i) { + struct userdata *u; + pa_sink_input_assert_ref(i); + pa_assert_se(u = i->userdata); + pa_sink_set_latency_range_within_thread(u->sink, + i->sink->thread_info.min_latency, + i->sink->thread_info.max_latency); +} + +/* Called from I/O thread context */ +static void sink_input_update_sink_fixed_latency_cb(pa_sink_input *i) { + struct userdata *u; + pa_sink_input_assert_ref(i); + pa_assert_se(u = i->userdata); + /* (7) IF YOU NEED A FIXED BLOCK SIZE ADD THE LATENCY FOR ONE BLOCK MINUS + * ONE SAMPLE HERE. pa_usec_to_bytes_round_up() IS USEFUL FOR THAT. */ + pa_sink_set_fixed_latency_within_thread(u->sink, i->sink->thread_info.fixed_latency); +} + +/* Called from I/O thread context */ +static void sink_input_detach_cb(pa_sink_input *i) { + struct userdata *u; + pa_sink_input_assert_ref(i); + pa_assert_se(u = i->userdata); + pa_sink_detach_within_thread(u->sink); + pa_sink_set_rtpoll(u->sink, NULL); +} + +/* Called from I/O thread context */ +static void sink_input_attach_cb(pa_sink_input *i) { + struct userdata *u; + pa_sink_input_assert_ref(i); + pa_assert_se(u = i->userdata); + + pa_sink_set_rtpoll(u->sink, i->sink->thread_info.rtpoll); + pa_sink_set_latency_range_within_thread(u->sink, + i->sink->thread_info.min_latency, + i->sink->thread_info.max_latency); + /* (8.1) IF YOU NEED A FIXED BLOCK SIZE ADD THE LATENCY FOR ONE BLOCK MINUS + * ONE SAMPLE HERE. SEE (7) */ + pa_sink_set_fixed_latency_within_thread(u->sink, i->sink->thread_info.fixed_latency); + /* (8.2) IF YOU NEED A FIXED BLOCK SIZE ROUND pa_sink_input_get_max_request(i) + * UP TO MULTIPLES OF IT HERE. SEE (6) */ + pa_sink_set_max_request_within_thread(u->sink, pa_sink_input_get_max_request(i)); + /* FIXME: Too small max_rewind: + * https://bugs.freedesktop.org/show_bug.cgi?id=53709 */ + pa_sink_set_max_rewind_within_thread(u->sink, pa_sink_input_get_max_rewind(i)); + + pa_sink_attach_within_thread(u->sink); +} + +/* Called from main context */ +static void sink_input_kill_cb(pa_sink_input *i) { + struct userdata *u; + + pa_sink_input_assert_ref(i); + pa_assert_se(u = i->userdata); + + /* The order here matters! We first kill the sink input, followed by the sink. + * That means the sink callbacks must be protected against an unconnected sink input! */ + pa_sink_input_unlink(u->sink_input); + pa_sink_unlink(u->sink); + + pa_sink_input_unref(u->sink_input); + u->sink_input = NULL; + + pa_sink_unref(u->sink); + u->sink = NULL; + + pa_module_unload_request(u->module, TRUE); +} + +/* Called from IO thread context */ +static void sink_input_state_change_cb(pa_sink_input *i, pa_sink_input_state_t state) { + struct userdata *u; + pa_sink_input_assert_ref(i); + pa_assert_se(u = i->userdata); + /* If we are added for the first time, ask for a rewinding so that we are heard right-away. */ + if (PA_SINK_INPUT_IS_LINKED(state) && + i->thread_info.state == PA_SINK_INPUT_INIT) { + pa_log_debug("Requesting rewind due to state change."); + pa_sink_input_request_rewind(i, 0, FALSE, TRUE, TRUE); + } +} + +/* Called from main context */ +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_se(u = i->userdata); + return u->sink != dest; +} + +/* Called from main context */ +static void sink_input_moving_cb(pa_sink_input *i, pa_sink *dest) { + struct userdata *u; + + pa_sink_input_assert_ref(i); + pa_assert_se(u = i->userdata); + + if (dest) { + pa_sink_set_asyncmsgq(u->sink, dest->asyncmsgq); + pa_sink_update_flags(u->sink, PA_SINK_LATENCY|PA_SINK_DYNAMIC_LATENCY, dest->flags); + } else + pa_sink_set_asyncmsgq(u->sink, NULL); + + if (u->auto_desc && dest) { + const char *z; + pa_proplist *pl; + + pl = pa_proplist_new(); + z = pa_proplist_gets(dest->proplist, PA_PROP_DEVICE_DESCRIPTION); + pa_proplist_setf(pl, PA_PROP_DEVICE_DESCRIPTION, "lfe-lp %s on %s", + pa_proplist_gets(u->sink->proplist, "device.vsink.name"), z ? z : dest->name); + + pa_sink_update_proplist(u->sink, PA_UPDATE_REPLACE, pl); + pa_proplist_free(pl); + } +} + +/* Called from main context */ +static void sink_input_volume_changed_cb(pa_sink_input *i) { + struct userdata *u; + pa_sink_input_assert_ref(i); + pa_assert_se(u = i->userdata); + pa_sink_volume_changed(u->sink, &i->volume); +} + +/* Called from main context */ +static void sink_input_mute_changed_cb(pa_sink_input *i) { + struct userdata *u; + pa_sink_input_assert_ref(i); + pa_assert_se(u = i->userdata); + pa_sink_mute_changed(u->sink, i->muted); +} + +int pa__init(pa_module *m) { + struct userdata *u; + pa_channel_map map; + pa_modargs *ma; + pa_sink *master=NULL; + pa_sink_input_new_data sink_input_data; + pa_sink_new_data sink_data; + pa_bool_t use_volume_sharing = TRUE; + pa_bool_t force_flat_volume = FALSE; + float arg_lpfreq = 100.0; + double rc_lp, rc_hp, dt; + pa_memchunk silence; + + pa_assert(m); + + if (!(ma = pa_modargs_new(m->argument, valid_modargs))) { + pa_log("Failed to parse module arguments."); + goto fail; + } + + if (!(master = pa_namereg_get(m->core, pa_modargs_get_value(ma, "master", NULL), PA_NAMEREG_SINK))) { + pa_log("Master sink not found"); + goto fail; + } + pa_assert(master); + + u = pa_xnew0(struct userdata, 1); + + /* TODO: debugging, remove me + u->lfe_lp_log = fopen("/tmp/lfe_lp_log","w"); */ + + // get, validate and assign lowpass cutoff freq + arg_lpfreq = atof(pa_modargs_get_value(ma, "lpfreq", "100.0")); + if ((arg_lpfreq < 20.0) || (arg_lpfreq > 500.0)) { + pa_log ("JZ: %s[%d] lpfreq must be between 20.0 and 500.0.", __FILE__, __LINE__); + goto fail; + } + u->lpfreq = arg_lpfreq; + pa_log_debug ("JZ: %s[%d] lpfreq=%f\n", __FILE__, __LINE__, u->lpfreq ); + + u->sample_spec = master->sample_spec; + u->sample_spec.format = PA_SAMPLE_FLOAT32; + + // setup filter factors + rc_lp = ((double)1.0 / + ((u->lpfreq * (double)0.8408964152537146) * // / sqrt(sqrt(2)) + (double)2.0 * + (double)3.1415926535897932384626433 + ) + ); + rc_hp = ((double)1.0 / + ((u->lpfreq * (double)1.189207115002721) * // * sqrt(sqrt(2)) + (double)2.0 * + (double)3.1415926535897932384626433 + ) + ); + dt = ((double)1.0 / (double)u->sample_spec.rate); + u->lp_factor = dt / (dt + rc_lp); + u->hp_factor = rc_hp / (dt + rc_hp); + pa_log ("JZ: %s[%d]\n\tlp_factor=%f\n\thp_factor=%f\n", + __FILE__, __LINE__, u->lp_factor, u->hp_factor ); + + // init filter data + for (unsigned int i=0; i<PA_CHANNELS_MAX; i++) { + u->filtered[i] = (double)0.0; + u->prev_sample[i] = (double)0.0; + } + + map = master->channel_map; + if (pa_modargs_get_sample_spec_and_channel_map(ma, &u->sample_spec, &map, PA_CHANNEL_MAP_DEFAULT) < 0) { + pa_log("Invalid sample format specification or channel map"); + goto fail; + } + + // make sure we have and lfe channel + u->lfe_index = PA_CHANNELS_MAX + 1; + u->center_index = PA_CHANNELS_MAX + 2; + for (int i=0; i<u->sample_spec.channels; i++) { + if (map.map[i] == PA_CHANNEL_POSITION_LFE) { + u->lfe_index = i; + pa_log ("JZ: %s[%d] lfe_index=%u", __FILE__, __LINE__, u->lfe_index); + } + if (map.map[i] == PA_CHANNEL_POSITION_CENTER) { + u->center_index = i; + pa_log ("JZ: %s[%d] center_index=%u", __FILE__, __LINE__, u->center_index); + } + } + if (u->lfe_index > PA_CHANNELS_MAX) { + pa_log("JZ: %s[%d] no lfe channel found", __FILE__, __LINE__ ); + // TODO: debugging, remove me and reenable fail + //u->lfe_index = 0; + //goto fail; + } + + if (pa_modargs_get_value_boolean(ma, "use_volume_sharing", &use_volume_sharing) < 0) { + pa_log("use_volume_sharing= expects a boolean argument"); + goto fail; + } + + if (pa_modargs_get_value_boolean(ma, "force_flat_volume", &force_flat_volume) < 0) { + pa_log("force_flat_volume= expects a boolean argument"); + goto fail; + } + + if (use_volume_sharing && force_flat_volume) { + pa_log("Flat volume can't be forced when using volume sharing."); + goto fail; + } + + u->module = m; + m->userdata = u; + + /* Create sink */ + pa_sink_new_data_init(&sink_data); + sink_data.driver = __FILE__; + sink_data.module = m; + if (!(sink_data.name = + pa_xstrdup(pa_modargs_get_value(ma, "sink_name", NULL)))) { + sink_data.name = pa_sprintf_malloc("%s.lfe_lp", master->name); + } + pa_sink_new_data_set_sample_spec(&sink_data, &u->sample_spec); + pa_sink_new_data_set_channel_map(&sink_data, &map); + pa_proplist_sets(sink_data.proplist, + PA_PROP_DEVICE_MASTER_DEVICE, + master->name); + pa_proplist_sets(sink_data.proplist, + PA_PROP_DEVICE_CLASS, + "filter"); + pa_proplist_sets(sink_data.proplist, + "device.lfe_lp.name", + sink_data.name); + + if (pa_modargs_get_proplist(ma, + "sink_properties", + sink_data.proplist, + PA_UPDATE_REPLACE) < 0) { + pa_log("Invalid properties"); + pa_sink_new_data_done(&sink_data); + goto fail; + } + + if ((u->auto_desc = !pa_proplist_contains(sink_data.proplist, + PA_PROP_DEVICE_DESCRIPTION))) { + const char *z; + z = pa_proplist_gets(master->proplist, PA_PROP_DEVICE_DESCRIPTION); + pa_proplist_setf(sink_data.proplist, + PA_PROP_DEVICE_DESCRIPTION, + "lfe-lp %s on %s", + sink_data.name, + z ? z : master->name); + } + + // FIXME: should be PA_SINK_SHARE_VOLUME_WITH_MASTER not 0x1000000U + u->sink = pa_sink_new(m->core, &sink_data, (master->flags & (PA_SINK_LATENCY|PA_SINK_DYNAMIC_LATENCY)) + | (use_volume_sharing ? 0x1000000U : 0)); + pa_sink_new_data_done(&sink_data); + + if (!u->sink) { + pa_log("Failed to create sink."); + goto fail; + } + + u->sink->parent.process_msg = sink_process_msg_cb; + u->sink->set_state = sink_set_state_cb; + u->sink->update_requested_latency = sink_update_requested_latency_cb; + u->sink->request_rewind = sink_request_rewind_cb; + pa_sink_set_set_mute_callback(u->sink, sink_set_mute_cb); + if (!use_volume_sharing) { + pa_sink_set_set_volume_callback(u->sink, sink_set_volume_cb); + pa_sink_enable_decibel_volume(u->sink, TRUE); + } + /* Normally this flag would be enabled automatically be we can force it. */ + if (force_flat_volume) + u->sink->flags |= PA_SINK_FLAT_VOLUME; + u->sink->userdata = u; + + pa_sink_set_asyncmsgq(u->sink, master->asyncmsgq); + + /* Create sink input */ + pa_sink_input_new_data_init(&sink_input_data); + sink_input_data.driver = __FILE__; + sink_input_data.module = m; + pa_sink_input_new_data_set_sink(&sink_input_data, master, FALSE); + sink_input_data.origin_sink = u->sink; + pa_proplist_setf(sink_input_data.proplist, + PA_PROP_MEDIA_NAME, + "lfe-lp Stream from %s", + pa_proplist_gets(u->sink->proplist, + PA_PROP_DEVICE_DESCRIPTION) + ); + pa_proplist_sets(sink_input_data.proplist, PA_PROP_MEDIA_ROLE, "filter"); + pa_sink_input_new_data_set_sample_spec(&sink_input_data, &u->sample_spec); + 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_new_data_done(&sink_input_data); + + if (!u->sink_input) + goto fail; + + u->sink_input->pop = sink_input_pop_cb; + u->sink_input->process_rewind = sink_input_process_rewind_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->update_sink_latency_range = sink_input_update_sink_latency_range_cb; + u->sink_input->update_sink_fixed_latency = sink_input_update_sink_fixed_latency_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->state_change = sink_input_state_change_cb; + u->sink_input->may_move_to = sink_input_may_move_to_cb; + u->sink_input->moving = sink_input_moving_cb; + u->sink_input->volume_changed = use_volume_sharing ? NULL : sink_input_volume_changed_cb; + u->sink_input->mute_changed = sink_input_mute_changed_cb; + u->sink_input->userdata = u; + + u->sink->input_to_master = u->sink_input; + + pa_sink_input_get_silence(u->sink_input, &silence); + u->memblockq = pa_memblockq_new("module-lfe-lp memblockq", //name + 0, //start index + MEMBLOCKQ_MAXLENGTH, //max length + 0, //target length + &u->sample_spec, //sample_spec + 1, //prebuf + 1, //minreq + 0, //maxrewind + &silence); //silence + pa_memblock_unref(silence.memblock); + + /* (9) INITIALIZE ANYTHING ELSE YOU NEED HERE */ + pa_sink_put(u->sink); + pa_sink_input_put(u->sink_input); + pa_modargs_free(ma); + pa_log_debug ("JZ: %s[%d] finished lfe-lp.pa__init().", __FILE__, __LINE__ ); + return 0; + +fail: + if (ma) + pa_modargs_free(ma); + pa__done(m); + return -1; +} + +int pa__get_n_used(pa_module *m) { + struct userdata *u; + pa_assert(m); + pa_assert_se(u = m->userdata); + return pa_sink_linked_by(u->sink); +} + +void pa__done(pa_module*m) { + struct userdata *u; + pa_log_debug ("JZ: %s[%d] ", __FILE__, __LINE__ ); + pa_assert(m); + + if (!(u = m->userdata)) + return; + + /* TODO: debugging, remove me + fflush(u->lfe_lp_log); + fclose(u->lfe_lp_log); */ + + /* See comments in sink_input_kill_cb() above regarding + * destruction order! */ + + if (u->sink_input) + pa_sink_input_unlink(u->sink_input); + + if (u->sink) + pa_sink_unlink(u->sink); + + if (u->sink_input) + pa_sink_input_unref(u->sink_input); + + if (u->sink) + pa_sink_unref(u->sink); + + if (u->memblockq) + pa_memblockq_free(u->memblockq); + + pa_xfree(u); +}
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