diff options
Diffstat (limited to 'src/modules/module-virtual-surround-sink.c')
| -rw-r--r-- | src/modules/module-virtual-surround-sink.c | 952 |
1 files changed, 952 insertions, 0 deletions
diff --git a/src/modules/module-virtual-surround-sink.c b/src/modules/module-virtual-surround-sink.c new file mode 100644 index 0000000..c321073 --- /dev/null +++ b/src/modules/module-virtual-surround-sink.c @@ -0,0 +1,952 @@ +/*** + This file is part of PulseAudio. + + Copyright 2010 Intel Corporation + Contributor: Pierre-Louis Bossart <pierre-louis.bossart@intel.com> + Copyright 2012 Niels Ole Salscheider <niels_ole@salscheider-online.de> + + 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, see <http://www.gnu.org/licenses/>. +***/ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <pulse/gccmacro.h> +#include <pulse/xmalloc.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 <pulsecore/sound-file.h> +#include <pulsecore/resampler.h> + +#include <math.h> + +PA_MODULE_AUTHOR("Niels Ole Salscheider"); +PA_MODULE_DESCRIPTION(_("Virtual surround sink")); +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> " + "master=<name of sink to filter> " + "sink_master=<name of sink to filter> " + "format=<sample format> " + "rate=<sample rate> " + "channels=<number of channels> " + "channel_map=<channel map> " + "use_volume_sharing=<yes or no> " + "force_flat_volume=<yes or no> " + "hrir=/path/to/left_hrir.wav " + "autoloaded=<set if this module is being loaded automatically> " + )); + +#define MEMBLOCKQ_MAXLENGTH (16*1024*1024) +#define DEFAULT_AUTOLOADED false + +struct userdata { + pa_module *module; + + /* FIXME: Uncomment this and take "autoloaded" as a modarg if this is a filter */ + /* bool autoloaded; */ + + pa_sink *sink; + pa_sink_input *sink_input; + + pa_memblockq *memblockq; + + bool auto_desc; + unsigned channels; + unsigned hrir_channels; + + unsigned fs, sink_fs; + + unsigned *mapping_left; + unsigned *mapping_right; + + unsigned hrir_samples; + float *hrir_data; + + float *input_buffer; + int input_buffer_offset; + + bool autoloaded; +}; + +static const char* const valid_modargs[] = { + "sink_name", + "sink_properties", + "master", /* Will be deprecated. */ + "sink_master", + "format", + "rate", + "channels", + "channel_map", + "use_volume_sharing", + "force_flat_volume", + "hrir", + "autoloaded", + 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)) { + *((int64_t*) data) = 0; + return 0; + } + + *((int64_t*) data) = + + /* Get the latency of the master sink */ + pa_sink_get_latency_within_thread(u->sink_input->sink, true) + + + /* Add the latency internal to our sink input on top */ + 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_in_main_thread_cb(pa_sink *s, pa_sink_state_t state, pa_suspend_cause_t suspend_cause) { + 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(u->sink_input->state)) + return 0; + + pa_sink_input_cork(u->sink_input, state == PA_SINK_SUSPENDED); + return 0; +} + +/* Called from the IO thread. */ +static int sink_set_state_in_io_thread_cb(pa_sink *s, pa_sink_state_t new_state, pa_suspend_cause_t new_suspend_cause) { + struct userdata *u; + + pa_assert(s); + pa_assert_se(u = s->userdata); + + /* When set to running or idle for the first time, request a rewind + * of the master sink to make sure we are heard immediately */ + if (PA_SINK_IS_OPENED(new_state) && s->thread_info.state == PA_SINK_INIT) { + pa_log_debug("Requesting rewind due to state change."); + pa_sink_input_request_rewind(u->sink_input, 0, false, true, true); + } + + 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(s->state) || + !PA_SINK_INPUT_IS_LINKED(u->sink_input->state)) + 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(s->state) || + !PA_SINK_INPUT_IS_LINKED(u->sink_input->state)) + return; + + pa_sink_input_set_mute(u->sink_input, s->muted, s->save_muted); +} + +/* Called from I/O thread context */ +static int sink_input_pop_cb(pa_sink_input *i, size_t nbytes, pa_memchunk *chunk) { + struct userdata *u; + float *src, *dst; + unsigned n; + pa_memchunk tchunk; + + unsigned j, k, l; + float sum_right, sum_left; + float current_sample; + + pa_sink_input_assert_ref(i); + pa_assert(chunk); + pa_assert_se(u = i->userdata); + + if (!PA_SINK_IS_LINKED(u->sink->thread_info.state)) + return -1; + + /* Hmm, process any rewind request that might be queued up */ + pa_sink_process_rewind(u->sink, 0); + + while (pa_memblockq_peek(u->memblockq, &tchunk) < 0) { + pa_memchunk nchunk; + + pa_sink_render(u->sink, nbytes * u->sink_fs / u->fs, &nchunk); + pa_memblockq_push(u->memblockq, &nchunk); + pa_memblock_unref(nchunk.memblock); + } + + tchunk.length = PA_MIN(nbytes * u->sink_fs / u->fs, tchunk.length); + pa_assert(tchunk.length > 0); + + n = (unsigned) (tchunk.length / u->sink_fs); + + pa_assert(n > 0); + + chunk->index = 0; + chunk->length = n * u->fs; + chunk->memblock = pa_memblock_new(i->sink->core->mempool, chunk->length); + + pa_memblockq_drop(u->memblockq, n * u->sink_fs); + + src = pa_memblock_acquire_chunk(&tchunk); + dst = pa_memblock_acquire(chunk->memblock); + + for (l = 0; l < n; l++) { + memcpy(((char*) u->input_buffer) + u->input_buffer_offset * u->sink_fs, ((char *) src) + l * u->sink_fs, u->sink_fs); + + sum_right = 0; + sum_left = 0; + + /* fold the input buffer with the impulse response */ + for (j = 0; j < u->hrir_samples; j++) { + for (k = 0; k < u->channels; k++) { + current_sample = u->input_buffer[((u->input_buffer_offset + j) % u->hrir_samples) * u->channels + k]; + + sum_left += current_sample * u->hrir_data[j * u->hrir_channels + u->mapping_left[k]]; + sum_right += current_sample * u->hrir_data[j * u->hrir_channels + u->mapping_right[k]]; + } + } + + dst[2 * l] = PA_CLAMP_UNLIKELY(sum_left, -1.0f, 1.0f); + dst[2 * l + 1] = PA_CLAMP_UNLIKELY(sum_right, -1.0f, 1.0f); + + u->input_buffer_offset--; + if (u->input_buffer_offset < 0) + u->input_buffer_offset += u->hrir_samples; + } + + pa_memblock_release(tchunk.memblock); + pa_memblock_release(chunk->memblock); + + pa_memblock_unref(tchunk.memblock); + + 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 the sink is not yet linked, there is nothing to rewind */ + if (!PA_SINK_IS_LINKED(u->sink->thread_info.state)) + return; + + if (u->sink->thread_info.rewind_nbytes > 0) { + size_t max_rewrite; + + max_rewrite = nbytes * u->sink_fs / u->fs + pa_memblockq_get_length(u->memblockq); + amount = PA_MIN(u->sink->thread_info.rewind_nbytes * u->sink_fs / u->fs, max_rewrite); + u->sink->thread_info.rewind_nbytes = 0; + + if (amount > 0) { + pa_memblockq_seek(u->memblockq, - (int64_t) amount, PA_SEEK_RELATIVE, true); + + /* Reset the input buffer */ + memset(u->input_buffer, 0, u->hrir_samples * u->sink_fs); + u->input_buffer_offset = 0; + } + } + + pa_sink_process_rewind(u->sink, amount); + pa_memblockq_rewind(u->memblockq, nbytes * u->sink_fs / u->fs); +} + +/* 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 * u->sink_fs / u->fs); + pa_sink_set_max_rewind_within_thread(u->sink, nbytes * u->sink_fs / u->fs); +} + +/* 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); + + pa_sink_set_max_request_within_thread(u->sink, nbytes * u->sink_fs / u->fs); +} + +/* 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); + + 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); + + if (PA_SINK_IS_LINKED(u->sink->thread_info.state)) + 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); + + pa_sink_set_fixed_latency_within_thread(u->sink, i->sink->thread_info.fixed_latency); + + pa_sink_set_max_request_within_thread(u->sink, pa_sink_input_get_max_request(i) * u->sink_fs / u->fs); + + /* 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) * u->sink_fs / u->fs); + + if (PA_SINK_IS_LINKED(u->sink->thread_info.state)) + 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 so that streams + * can properly be moved away while the sink input is still connected + * to the master. */ + pa_sink_input_cork(u->sink_input, true); + pa_sink_unlink(u->sink); + pa_sink_input_unlink(u->sink_input); + + 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 main context */ +static bool 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); + + if (u->autoloaded) + return false; + + 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, "Virtual Surround Sink %s on %s", + pa_proplist_gets(u->sink->proplist, "device.vsurroundsink.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); +} + +static pa_channel_position_t mirror_channel(pa_channel_position_t channel) { + switch (channel) { + case PA_CHANNEL_POSITION_FRONT_LEFT: + return PA_CHANNEL_POSITION_FRONT_RIGHT; + + case PA_CHANNEL_POSITION_FRONT_RIGHT: + return PA_CHANNEL_POSITION_FRONT_LEFT; + + case PA_CHANNEL_POSITION_REAR_LEFT: + return PA_CHANNEL_POSITION_REAR_RIGHT; + + case PA_CHANNEL_POSITION_REAR_RIGHT: + return PA_CHANNEL_POSITION_REAR_LEFT; + + case PA_CHANNEL_POSITION_SIDE_LEFT: + return PA_CHANNEL_POSITION_SIDE_RIGHT; + + case PA_CHANNEL_POSITION_SIDE_RIGHT: + return PA_CHANNEL_POSITION_SIDE_LEFT; + + case PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER: + return PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER; + + case PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER: + return PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER; + + case PA_CHANNEL_POSITION_TOP_FRONT_LEFT: + return PA_CHANNEL_POSITION_TOP_FRONT_RIGHT; + + case PA_CHANNEL_POSITION_TOP_FRONT_RIGHT: + return PA_CHANNEL_POSITION_TOP_FRONT_LEFT; + + case PA_CHANNEL_POSITION_TOP_REAR_LEFT: + return PA_CHANNEL_POSITION_TOP_REAR_RIGHT; + + case PA_CHANNEL_POSITION_TOP_REAR_RIGHT: + return PA_CHANNEL_POSITION_TOP_REAR_LEFT; + + default: + return channel; + } +} + +static void normalize_hrir(struct userdata *u) { + /* normalize hrir to avoid audible clipping + * + * The following heuristic tries to avoid audible clipping. It cannot avoid + * clipping in the worst case though, because the scaling factor would + * become too large resulting in a too quiet signal. + * The idea of the heuristic is to avoid clipping when a single click is + * played back on all channels. The scaling factor describes the additional + * factor that is necessary to avoid clipping for "normal" signals. + * + * This algorithm doesn't pretend to be perfect, it's just something that + * appears to work (not too quiet, no audible clipping) on the material that + * it has been tested on. If you find a real-world example where this + * algorithm results in audible clipping, please write a patch that adjusts + * the scaling factor constants or improves the algorithm (or if you can't + * write a patch, at least report the problem to the PulseAudio mailing list + * or bug tracker). */ + + const float scaling_factor = 2.5; + + float hrir_sum, hrir_max; + unsigned i, j; + + hrir_max = 0; + for (i = 0; i < u->hrir_samples; i++) { + hrir_sum = 0; + for (j = 0; j < u->hrir_channels; j++) + hrir_sum += fabs(u->hrir_data[i * u->hrir_channels + j]); + + if (hrir_sum > hrir_max) + hrir_max = hrir_sum; + } + + for (i = 0; i < u->hrir_samples; i++) { + for (j = 0; j < u->hrir_channels; j++) + u->hrir_data[i * u->hrir_channels + j] /= hrir_max * scaling_factor; + } +} + +int pa__init(pa_module*m) { + struct userdata *u; + pa_sample_spec ss, sink_input_ss; + pa_channel_map map, sink_input_map; + pa_modargs *ma; + const char *master_name; + pa_sink *master = NULL; + pa_sink_input_new_data sink_input_data; + pa_sink_new_data sink_data; + bool use_volume_sharing = true; + bool force_flat_volume = false; + pa_memchunk silence; + + const char *hrir_file; + unsigned i, j, found_channel_left, found_channel_right; + float *hrir_data; + + pa_sample_spec hrir_ss; + pa_channel_map hrir_map; + + pa_sample_spec hrir_temp_ss; + pa_memchunk hrir_temp_chunk, hrir_temp_chunk_resampled; + pa_resampler *resampler; + + size_t hrir_copied_length, hrir_total_length; + + hrir_temp_chunk.memblock = NULL; + hrir_temp_chunk_resampled.memblock = NULL; + + pa_assert(m); + + if (!(ma = pa_modargs_new(m->argument, valid_modargs))) { + pa_log("Failed to parse module arguments."); + goto fail; + } + + master_name = pa_modargs_get_value(ma, "sink_master", NULL); + if (!master_name) { + master_name = pa_modargs_get_value(ma, "master", NULL); + if (master_name) + pa_log_warn("The 'master' module argument is deprecated and may be removed in the future, " + "please use the 'sink_master' argument instead."); + } + + master = pa_namereg_get(m->core, master_name, PA_NAMEREG_SINK); + if (!master) { + pa_log("Master sink not found."); + goto fail; + } + + pa_assert(master); + + u = pa_xnew0(struct userdata, 1); + u->module = m; + m->userdata = u; + + /* Initialize hrir and input buffer */ + /* this is the hrir file for the left ear! */ + if (!(hrir_file = pa_modargs_get_value(ma, "hrir", NULL))) { + pa_log("The mandatory 'hrir' module argument is missing."); + goto fail; + } + + if (pa_sound_file_load(master->core->mempool, hrir_file, &hrir_temp_ss, &hrir_map, &hrir_temp_chunk, NULL) < 0) { + pa_log("Cannot load hrir file."); + goto fail; + } + + /* sample spec / map of hrir */ + hrir_ss.format = PA_SAMPLE_FLOAT32; + hrir_ss.rate = master->sample_spec.rate; + hrir_ss.channels = hrir_temp_ss.channels; + + /* sample spec of sink */ + ss = hrir_ss; + map = hrir_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; + } + ss.format = PA_SAMPLE_FLOAT32; + hrir_ss.rate = ss.rate; + u->channels = ss.channels; + + 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; + } + + /* sample spec / map of sink input */ + pa_channel_map_init_stereo(&sink_input_map); + sink_input_ss.channels = 2; + sink_input_ss.format = PA_SAMPLE_FLOAT32; + sink_input_ss.rate = ss.rate; + + u->sink_fs = pa_frame_size(&ss); + u->fs = pa_frame_size(&sink_input_ss); + + /* 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.vsurroundsink", master->name); + pa_sink_new_data_set_sample_spec(&sink_data, &ss); + 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.vsurroundsink.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; + } + + u->autoloaded = DEFAULT_AUTOLOADED; + if (pa_modargs_get_value_boolean(ma, "autoloaded", &u->autoloaded) < 0) { + pa_log("Failed to parse autoloaded value"); + 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, "Virtual Surround Sink %s on %s", sink_data.name, z ? z : master->name); + } + + u->sink = pa_sink_new(m->core, &sink_data, (master->flags & (PA_SINK_LATENCY|PA_SINK_DYNAMIC_LATENCY)) + | (use_volume_sharing ? PA_SINK_SHARE_VOLUME_WITH_MASTER : 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_in_main_thread = sink_set_state_in_main_thread_cb; + u->sink->set_state_in_io_thread = sink_set_state_in_io_thread_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, true); + sink_input_data.origin_sink = u->sink; + pa_proplist_setf(sink_input_data.proplist, PA_PROP_MEDIA_NAME, "Virtual Surround Sink 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, &sink_input_ss); + pa_sink_input_new_data_set_channel_map(&sink_input_data, &sink_input_map); + sink_input_data.flags |= PA_SINK_INPUT_START_CORKED; + + 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->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-virtual-surround-sink memblockq", 0, MEMBLOCKQ_MAXLENGTH, 0, &ss, 1, 1, 0, &silence); + pa_memblock_unref(silence.memblock); + + /* resample hrir */ + resampler = pa_resampler_new(u->sink->core->mempool, &hrir_temp_ss, &hrir_map, &hrir_ss, &hrir_map, u->sink->core->lfe_crossover_freq, + PA_RESAMPLER_SRC_SINC_BEST_QUALITY, PA_RESAMPLER_NO_REMAP); + + u->hrir_samples = hrir_temp_chunk.length / pa_frame_size(&hrir_temp_ss) * hrir_ss.rate / hrir_temp_ss.rate; + if (u->hrir_samples > 64) { + u->hrir_samples = 64; + pa_log("The (resampled) hrir contains more than 64 samples. Only the first 64 samples will be used to limit processor usage."); + } + + hrir_total_length = u->hrir_samples * pa_frame_size(&hrir_ss); + u->hrir_channels = hrir_ss.channels; + + u->hrir_data = (float *) pa_xmalloc(hrir_total_length); + hrir_copied_length = 0; + + /* add silence to the hrir until we get enough samples out of the resampler */ + while (hrir_copied_length < hrir_total_length) { + pa_resampler_run(resampler, &hrir_temp_chunk, &hrir_temp_chunk_resampled); + if (hrir_temp_chunk.memblock != hrir_temp_chunk_resampled.memblock) { + /* Silence input block */ + pa_silence_memblock(hrir_temp_chunk.memblock, &hrir_temp_ss); + } + + if (hrir_temp_chunk_resampled.memblock) { + /* Copy hrir data */ + hrir_data = (float *) pa_memblock_acquire(hrir_temp_chunk_resampled.memblock); + + if (hrir_total_length - hrir_copied_length >= hrir_temp_chunk_resampled.length) { + memcpy(u->hrir_data + hrir_copied_length, hrir_data, hrir_temp_chunk_resampled.length); + hrir_copied_length += hrir_temp_chunk_resampled.length; + } else { + memcpy(u->hrir_data + hrir_copied_length, hrir_data, hrir_total_length - hrir_copied_length); + hrir_copied_length = hrir_total_length; + } + + pa_memblock_release(hrir_temp_chunk_resampled.memblock); + pa_memblock_unref(hrir_temp_chunk_resampled.memblock); + hrir_temp_chunk_resampled.memblock = NULL; + } + } + + pa_resampler_free(resampler); + + pa_memblock_unref(hrir_temp_chunk.memblock); + hrir_temp_chunk.memblock = NULL; + + if (hrir_map.channels < map.channels) { + pa_log("hrir file does not have enough channels!"); + goto fail; + } + + normalize_hrir(u); + + /* create mapping between hrir and input */ + u->mapping_left = (unsigned *) pa_xnew0(unsigned, u->channels); + u->mapping_right = (unsigned *) pa_xnew0(unsigned, u->channels); + for (i = 0; i < map.channels; i++) { + found_channel_left = 0; + found_channel_right = 0; + + for (j = 0; j < hrir_map.channels; j++) { + if (hrir_map.map[j] == map.map[i]) { + u->mapping_left[i] = j; + found_channel_left = 1; + } + + if (hrir_map.map[j] == mirror_channel(map.map[i])) { + u->mapping_right[i] = j; + found_channel_right = 1; + } + } + + if (!found_channel_left) { + pa_log("Cannot find mapping for channel %s", pa_channel_position_to_string(map.map[i])); + goto fail; + } + if (!found_channel_right) { + pa_log("Cannot find mapping for channel %s", pa_channel_position_to_string(mirror_channel(map.map[i]))); + goto fail; + } + } + + u->input_buffer = pa_xmalloc0(u->hrir_samples * u->sink_fs); + u->input_buffer_offset = 0; + + /* The order here is important. The input must be put first, + * otherwise streams might attach to the sink before the sink + * input is attached to the master. */ + pa_sink_input_put(u->sink_input); + pa_sink_put(u->sink); + pa_sink_input_cork(u->sink_input, false); + + pa_modargs_free(ma); + return 0; + +fail: + if (hrir_temp_chunk.memblock) + pa_memblock_unref(hrir_temp_chunk.memblock); + + if (hrir_temp_chunk_resampled.memblock) + pa_memblock_unref(hrir_temp_chunk_resampled.memblock); + + 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_assert(m); + + if (!(u = m->userdata)) + return; + + /* See comments in sink_input_kill_cb() above regarding + * destruction order! */ + + if (u->sink_input) + pa_sink_input_cork(u->sink_input, true); + + if (u->sink) + pa_sink_unlink(u->sink); + + if (u->sink_input) { + pa_sink_input_unlink(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); + + if (u->hrir_data) + pa_xfree(u->hrir_data); + + if (u->input_buffer) + pa_xfree(u->input_buffer); + + if (u->mapping_left) + pa_xfree(u->mapping_left); + if (u->mapping_right) + pa_xfree(u->mapping_right); + + pa_xfree(u); +} |