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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 <SLES/OpenSLES.h>
#include <SLES/OpenSLES_Android.h>
PA_MODULE_AUTHOR("Lennart Poettering, Nathan Martynov");
PA_MODULE_DESCRIPTION("Android OpenSL ES 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> "
);
#define DEFAULT_SINK_NAME "OpenSL ES sink"
#define BLOCK_USEC (PA_USEC_PER_MSEC * 125)
enum {
SINK_MESSAGE_RENDER = PA_SINK_MESSAGE_MAX
};
struct userdata {
pa_core *core;
pa_module *module;
pa_sink *sink;
pa_thread *thread;
pa_thread_mq thread_mq;
pa_rtpoll *rtpoll;
pa_rtpoll_item *rtpoll_item;
pa_asyncmsgq *sles_msgq;
pa_usec_t block_usec;
pa_memchunk memchunk;
void *buf;
size_t nbytes;
SLObjectItf engineObject;
SLObjectItf outputMixObject;
SLObjectItf bqPlayerObject;
SLEngineItf engineEngine;
SLPlayItf bqPlayerPlay;
SLBufferQueueItf bqPlayerBufferQueue;
};
static const char* const valid_modargs[] = {
"sink_name",
"sink_properties",
"rate",
"latency",
NULL
};
static void process_render(void *userdata) {
struct userdata* u = userdata;
pa_assert(u);
/* a render message could be queued after a set state message */
if (!PA_SINK_IS_LINKED(u->sink->thread_info.state))
return;
u->memchunk.length = u->nbytes;
pa_sink_render_into(u->sink, &u->memchunk);
(*u->bqPlayerBufferQueue)->Enqueue(u->bqPlayerBufferQueue, u->buf, u->memchunk.length);
}
static int sink_process_msg(pa_msgobject *o, int code, void *data, int64_t offset, pa_memchunk *memchunk) {
switch (code) {
case SINK_MESSAGE_RENDER:
process_render(data);
return 0;
}
return pa_sink_process_msg(o, code, data, offset, memchunk);
};
static void sles_callback(SLBufferQueueItf bqPlayerBufferQueue, void *userdata) {
struct userdata* u = userdata;
pa_assert(u);
pa_assert_se(pa_asyncmsgq_send(u->sles_msgq, PA_MSGOBJECT(u->sink), SINK_MESSAGE_RENDER, u, 0, NULL) == 0);
}
#define CHK(stmt) { \
SLresult res = stmt; \
if (res != SL_RESULT_SUCCESS) { \
fprintf(stderr, "error %d at %s:%d\n", res, __FILE__, __LINE__); \
goto fail; \
} \
}
static int pa_init_sles_player(struct userdata *u, pa_sample_spec *ss) {
CHK(slCreateEngine(&(u->engineObject), 0, NULL, 0, NULL, NULL));
CHK((*u->engineObject)->Realize(u->engineObject, SL_BOOLEAN_FALSE));
CHK((*u->engineObject)->GetInterface(u->engineObject, SL_IID_ENGINE, &(u->engineEngine)));
CHK((*u->engineEngine)->CreateOutputMix(u->engineEngine, &(u->outputMixObject), 0, NULL, NULL));
CHK((*u->outputMixObject)->Realize(u->outputMixObject, SL_BOOLEAN_FALSE));
SLDataLocator_BufferQueue locator_bufferqueue;
locator_bufferqueue.locatorType = SL_DATALOCATOR_BUFFERQUEUE;
locator_bufferqueue.numBuffers = 8;
SLAndroidDataFormat_PCM_EX pcm;
if (ss->format == PA_SAMPLE_FLOAT32LE) {
pcm.formatType = SL_ANDROID_DATAFORMAT_PCM_EX;
pcm.representation = SL_ANDROID_PCM_REPRESENTATION_FLOAT;
} else {
pcm.formatType = SL_DATAFORMAT_PCM;
}
pcm.numChannels = ss->channels;
pcm.sampleRate = ss->rate * 1000;
pcm.bitsPerSample = pcm.containerSize = pa_sample_size(ss) * 8;
pcm.channelMask = SL_SPEAKER_FRONT_LEFT | SL_SPEAKER_FRONT_RIGHT;
pcm.endianness = SL_BYTEORDER_LITTLEENDIAN;
SLDataSource audiosrc;
audiosrc.pLocator = &locator_bufferqueue;
audiosrc.pFormat = &pcm;
SLDataLocator_OutputMix locator_outputmix;
locator_outputmix.locatorType = SL_DATALOCATOR_OUTPUTMIX;
locator_outputmix.outputMix = u->outputMixObject;
SLDataSink audiosnk;
audiosnk.pLocator = &locator_outputmix;
audiosnk.pFormat = NULL;
SLInterfaceID ids[1] = {SL_IID_BUFFERQUEUE};
SLboolean flags[1] = {SL_BOOLEAN_TRUE};
CHK((*u->engineEngine)->CreateAudioPlayer(u->engineEngine, &u->bqPlayerObject, &audiosrc, &audiosnk, 1, ids, flags));
CHK((*u->bqPlayerObject)->Realize(u->bqPlayerObject, SL_BOOLEAN_FALSE));
CHK((*u->bqPlayerObject)->GetInterface(u->bqPlayerObject, SL_IID_PLAY, &u->bqPlayerPlay));
CHK((*u->bqPlayerObject)->GetInterface(u->bqPlayerObject, SL_IID_BUFFERQUEUE, &u->bqPlayerBufferQueue));
CHK((*u->bqPlayerBufferQueue)->RegisterCallback(u->bqPlayerBufferQueue, sles_callback, u));
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 ((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;
if (PA_SINK_IS_OPENED(s->state) &&
(state == PA_SINK_SUSPENDED || state == PA_SINK_UNLINKED))
(*u->bqPlayerPlay)->SetPlayState(u->bqPlayerPlay, SL_PLAYSTATE_STOPPED);
else if ((s->state == PA_SINK_SUSPENDED || s->state == PA_SINK_INIT) &&
PA_SINK_IS_OPENED(state))
(*u->bqPlayerPlay)->SetPlayState(u->bqPlayerPlay, SL_PLAYSTATE_PLAYING);
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_sample_spec ss;
pa_channel_map map;
pa_modargs *ma = NULL;
pa_sink_new_data data;
uint32_t latency = 0;
pa_assert(m);
m->userdata = u = pa_xnew0(struct userdata, 1);
u->core = m->core;
u->module = m;
u->rtpoll = pa_rtpoll_new();
if (pa_thread_mq_init(&u->thread_mq, m->core->mainloop, u->rtpoll) < 0) {
pa_log("pa_thread_mq_init() failed.");
goto fail;
}
/* The queue linking the AudioTrack thread and our RT thread */
u->sles_msgq = pa_asyncmsgq_new(0);
if (!u->sles_msgq) {
pa_log("pa_asyncmsgq_new() failed.");
goto fail;
}
/* The msgq from the AudioTrack RT thread should have an even higher
* priority than the normal message queues, to match the guarantee
* all other drivers make: supplying the audio device with data is
* the top priority -- and as long as that is possible we don't do
* anything else */
u->rtpoll_item = pa_rtpoll_item_new_asyncmsgq_read(u->rtpoll, PA_RTPOLL_EARLY-1, u->sles_msgq);
if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
pa_log("Failed to parse module arguments.");
goto fail;
}
ss = m->core->default_sample_spec;
pa_channel_map_init_stereo(&map);
switch (ss.format) {
case PA_SAMPLE_S16LE:
case PA_SAMPLE_S24LE:
case PA_SAMPLE_S32LE:
case PA_SAMPLE_FLOAT32LE:
break;
default:
pa_log("Sample format not supported");
goto fail;
}
pa_modargs_get_sample_rate(ma, &ss.rate);
ss.channels = map.channels;
if (pa_init_sles_player(u, &ss) < 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, &ss);
pa_sink_new_data_set_channel_map(&data, &map);
pa_proplist_sets(data.proplist, PA_PROP_DEVICE_DESCRIPTION, _("OpenSL ES 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 = sink_process_msg;
u->sink->set_state_in_main_thread = state_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", &latency);
if (latency)
u->block_usec = latency * PA_USEC_PER_MSEC;
else
u->block_usec = BLOCK_USEC;
pa_sink_set_fixed_latency(u->sink, u->block_usec);
u->nbytes = pa_usec_to_bytes(u->block_usec, &u->sink->sample_spec);
u->buf = calloc(1, u->nbytes);
u->memchunk.memblock = pa_memblock_new_fixed(m->core->mempool, u->buf, u->nbytes, false);
if (!(u->thread = pa_thread_new("sles-sink", thread_func, u))) {
pa_log("Failed to create thread.");
goto fail;
}
pa_sink_put(u->sink);
sles_callback(u->bqPlayerBufferQueue, u);
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);
}
#define DESTROY(object) if (u->object) (*u->object)->Destroy(u->object);
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);
DESTROY(bqPlayerObject);
DESTROY(outputMixObject);
DESTROY(engineObject);
pa_memblock_unref_fixed(u->memchunk.memblock);
free(u->buf);
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_item)
pa_rtpoll_item_free(u->rtpoll_item);
if (u->sles_msgq)
pa_asyncmsgq_unref(u->sles_msgq);
if (u->rtpoll)
pa_rtpoll_free(u->rtpoll);
pa_xfree(u);
}
#undef DESTROY