termux-packages/packages/libpulseaudio/module-aaudio-sink.c

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/***
This file is part of PulseAudio.
Copyright 2004-2008 Lennart Poettering
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 <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <pulse/rtclock.h>
#include <pulse/timeval.h>
#include <pulse/xmalloc.h>
#include <pulsecore/i18n.h>
#include <pulsecore/macro.h>
#include <pulsecore/sink.h>
#include <pulsecore/module.h>
#include <pulsecore/core-util.h>
#include <pulsecore/modargs.h>
#include <pulsecore/log.h>
#include <pulsecore/thread.h>
#include <pulsecore/thread-mq.h>
#include <pulsecore/rtpoll.h>
#include <aaudio/AAudio.h>
PA_MODULE_AUTHOR("Tom Yan");
PA_MODULE_DESCRIPTION("Android AAudio 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> "
"rate=<sampling rate> "
"latency=<buffer length> "
"no_close_hack=<avoid segfault caused by AAudioStream_close()> "
);
#define DEFAULT_SINK_NAME "AAudio sink"
struct userdata {
pa_core *core;
pa_module *module;
pa_sink *sink;
pa_thread *thread;
pa_thread_mq thread_mq;
pa_rtpoll *rtpoll;
uint32_t latency;
uint32_t rate;
bool no_close;
pa_memchunk memchunk;
size_t frame_size;
AAudioStreamBuilder *builder;
AAudioStream *stream;
pa_sample_spec ss;
};
static const char* const valid_modargs[] = {
"sink_name",
"sink_properties",
"rate",
"latency",
"no_close_hack",
NULL
};
static void update_latency(struct userdata *u) {
pa_usec_t block_usec;
if(!u->latency) {
block_usec = PA_USEC_PER_SEC * AAudioStream_getBufferSizeInFrames(u->stream) / u->sink->sample_spec.rate / 2;
if(!pa_thread_mq_get())
pa_sink_set_fixed_latency(u->sink, block_usec);
else
pa_sink_set_fixed_latency_within_thread(u->sink, block_usec);
}
}
static aaudio_data_callback_result_t buffer_callback(AAudioStream *stream, void *userdata, void *audioData, int32_t numFrames) {
struct userdata* u = userdata;
pa_assert(u);
if (!pa_thread_mq_get()) {
pa_log_debug("Thread starting up");
pa_thread_mq_install(&u->thread_mq);
}
u->memchunk.memblock = pa_memblock_new_fixed(u->core->mempool, audioData, numFrames * u->frame_size, false);
u->memchunk.length = numFrames * u->frame_size;
pa_sink_render_into_full(u->sink, &u->memchunk);
pa_memblock_unref_fixed(u->memchunk.memblock);
return AAUDIO_CALLBACK_RESULT_CONTINUE;
}
static void error_callback(AAudioStream *stream, void *userdata, aaudio_result_t error) {
struct userdata* u = userdata;
pa_assert(u);
if (error == AAUDIO_ERROR_DISCONNECTED) {
if (!pa_thread_mq_get()) {
pa_sink_suspend(u->sink, true, PA_SUSPEND_UNAVAILABLE);
pa_sink_suspend(u->sink, false, PA_SUSPEND_UNAVAILABLE);
} else {
AAudioStream_requestStop(u->stream);
AAudioStream_requestStart(u->stream);
update_latency(u);
pa_log("Failed to reconfigure sink for new device.\n");
}
}
}
#define CHK(stmt) { \
aaudio_result_t res = stmt; \
if (res != AAUDIO_OK) { \
fprintf(stderr, "error %d at %s:%d\n", res, __FILE__, __LINE__); \
goto fail; \
} \
}
static int pa_open_aaudio_stream(struct userdata *u)
{
bool want_float;
aaudio_format_t format;
pa_sample_spec *ss = &u->ss;
CHK(AAudio_createStreamBuilder(&u->builder));
AAudioStreamBuilder_setPerformanceMode(u->builder, AAUDIO_PERFORMANCE_MODE_LOW_LATENCY);
AAudioStreamBuilder_setDataCallback(u->builder, buffer_callback, u);
AAudioStreamBuilder_setErrorCallback(u->builder, error_callback, u);
want_float = ss->format > PA_SAMPLE_S16BE;
ss->format = want_float ? PA_SAMPLE_FLOAT32LE : PA_SAMPLE_S16LE;
format = want_float ? AAUDIO_FORMAT_PCM_FLOAT : AAUDIO_FORMAT_PCM_I16;
AAudioStreamBuilder_setFormat(u->builder, format);
if (u->rate)
AAudioStreamBuilder_setSampleRate(u->builder, u->rate);
AAudioStreamBuilder_setChannelCount(u->builder, ss->channels);
CHK(AAudioStreamBuilder_openStream(u->builder, &u->stream));
CHK(AAudioStreamBuilder_delete(u->builder));
ss->rate = AAudioStream_getSampleRate(u->stream);
u->frame_size = pa_frame_size(ss);
return 0;
fail:
return -1;
}
#undef CHK
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);
for (;;) {
int ret;
if (PA_SINK_IS_LINKED(u->sink->thread_info.state)) {
AAudioStream_requestStart(u->stream);
update_latency(u);
break;
}
/* Hmm, nothing to do. Let's sleep */
if ((ret = pa_rtpoll_run(u->rtpoll)) < 0)
goto fail;
if (ret == 0)
goto finish;
}
for (;;) {
int ret;
/* Hmm, nothing to do. Let's sleep */
if ((ret = pa_rtpoll_run(u->rtpoll)) < 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");
}
static int state_func(pa_sink *s, pa_sink_state_t state, pa_suspend_cause_t suspend_cause) {
struct userdata *u = s->userdata;
int r = 0;
uint32_t idx;
pa_sink_input *i;
pa_idxset *inputs;
if ((PA_SINK_IS_OPENED(s->state) && state == PA_SINK_SUSPENDED) ||
(PA_SINK_IS_LINKED(s->state) && state == PA_SINK_UNLINKED)) {
if (u->no_close) {
AAudioStream_requestStop(u->stream);
} else {
AAudioStream_close(u->stream);
}
} else if (s->state == PA_SINK_SUSPENDED && PA_SINK_IS_OPENED(state)) {
pa_open_aaudio_stream(u);
inputs = pa_idxset_copy(s->inputs, NULL);
PA_IDXSET_FOREACH(i, inputs, idx) {
if (i->state == PA_SINK_INPUT_RUNNING) {
pa_sink_input_cork(i, true);
} else {
pa_idxset_remove_by_index(inputs, idx);
}
}
s->alternate_sample_rate = u->ss.rate;
pa_sink_reconfigure(s, &u->ss, false);
s->default_sample_rate = u->ss.rate;
/* Avoid infinite loop triggered if uncork in this case */
if (s->suspend_cause == PA_SUSPEND_IDLE)
pa_sink_suspend(u->sink, true, PA_SUSPEND_UNAVAILABLE);
PA_IDXSET_FOREACH(i, inputs, idx) pa_sink_input_cork(i, false);
pa_idxset_free(inputs, NULL);
AAudioStream_requestStart(u->stream);
update_latency(u);
}
return r;
}
static int reconfigure_func(pa_sink *s, pa_sample_spec *ss, bool passthrough) {
s->sample_spec.rate = ss->rate;
return 0;
}
static void process_rewind(pa_sink *s) {
pa_sink_process_rewind(s, 0);
}
int pa__init(pa_module*m) {
struct userdata *u = NULL;
pa_channel_map map;
pa_modargs *ma = NULL;
pa_sink_new_data data;
pa_usec_t block_usec;
pa_assert(m);
m->userdata = u = pa_xnew0(struct userdata, 1);
u->core = m->core;
u->module = m;
u->rtpoll = pa_rtpoll_new();
pa_thread_mq_init(&u->thread_mq, m->core->mainloop, u->rtpoll);
if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
pa_log("Failed to parse module arguments.");
goto fail;
}
u->ss = m->core->default_sample_spec;
map = m->core->default_channel_map;
pa_modargs_get_sample_rate(ma, &u->rate);
pa_modargs_get_value_boolean(ma, "no_close_hack", &u->no_close);
if (pa_open_aaudio_stream(u) < 0)
goto fail;
pa_sink_new_data_init(&data);
data.driver = __FILE__;
data.module = m;
pa_sink_new_data_set_name(&data, pa_modargs_get_value(ma, "sink_name", DEFAULT_SINK_NAME));
pa_sink_new_data_set_sample_spec(&data, &u->ss);
pa_sink_new_data_set_channel_map(&data, &map);
pa_proplist_sets(data.proplist, PA_PROP_DEVICE_DESCRIPTION, _("AAudio Output"));
pa_proplist_sets(data.proplist, PA_PROP_DEVICE_CLASS, "abstract");
if (pa_modargs_get_proplist(ma, "sink_properties", data.proplist, PA_UPDATE_REPLACE) < 0) {
pa_log("Invalid properties");
pa_sink_new_data_done(&data);
goto fail;
}
u->sink = pa_sink_new(m->core, &data, 0);
pa_sink_new_data_done(&data);
if (!u->sink) {
pa_log("Failed to create sink object.");
goto fail;
}
u->sink->parent.process_msg = pa_sink_process_msg;
u->sink->set_state_in_main_thread = state_func;
u->sink->reconfigure = reconfigure_func;
u->sink->request_rewind = process_rewind;
u->sink->userdata = u;
pa_sink_set_asyncmsgq(u->sink, u->thread_mq.inq);
pa_sink_set_rtpoll(u->sink, u->rtpoll);
pa_modargs_get_value_u32(ma, "latency", &u->latency);
if (u->latency) {
block_usec = PA_USEC_PER_MSEC * u->latency;
pa_sink_set_fixed_latency(u->sink, block_usec);
}
if (!(u->thread = pa_thread_new("aaudio-sink", thread_func, u))) {
pa_log("Failed to create thread.");
goto fail;
}
pa_sink_put(u->sink);
pa_modargs_free(ma);
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_assert(m);
if (!(u = m->userdata))
return;
if (u->sink)
pa_sink_unlink(u->sink);
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);
if (u->sink)
pa_sink_unref(u->sink);
if (u->rtpoll)
pa_rtpoll_free(u->rtpoll);
pa_xfree(u);
}