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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 "module-sles-sink-symdef.h"
//Only certain interfaces are supported by the fast mixer. These are:
//SL_IID_ANDROIDSIMPLEBUFFERQUEUE
//SL_IID_VOLUME
//SL_IID_MUTESOLO
#define USE_ANDROID_SIMPLE_BUFFER_QUEUE
#ifdef USE_ANDROID_SIMPLE_BUFFER_QUEUE
#include <SLES/OpenSLES_Android.h>
#define DATALOCATOR_BUFFERQUEUE SL_DATALOCATOR_ANDROIDSIMPLEBUFFERQUEUE
#define IID_BUFFERQUEUE SL_IID_ANDROIDSIMPLEBUFFERQUEUE
#define BufferQueueItf SLAndroidSimpleBufferQueueItf
#define BufferQueueState SLAndroidSimpleBufferQueueState
#define IID_BUFFERQUEUE_USED SL_IID_ANDROIDSIMPLEBUFFERQUEUE
#define INDEX index
#else
#define DATALOCATOR_BUFFERQUEUE SL_DATALOCATOR_BUFFERQUEUE
#define IID_BUFFERQUEUE SL_IID_BUFFERQUEUE
#define BufferQueueItf SLBufferQueueItf
#define BufferQueueState SLBufferQueueState
#define IID_BUFFERQUEUE_USED IID_BUFFERQUEUE
#define INDEX playIndex
#endif
#define checkResult(r) do { \
if ((r) != SL_RESULT_SUCCESS) { \
if ((r) == SL_RESULT_PARAMETER_INVALID) fprintf(stderr, "error SL_RESULT_PARAMETER_INVALID at %s:%d\n", __FILE__, __LINE__); \
else if ((r) == SL_RESULT_PRECONDITIONS_VIOLATED ) fprintf(stderr, "error SL_RESULT_PRECONDITIONS_VIOLATED at %s:%d\n", __FILE__, __LINE__); \
else fprintf(stderr, "error %d at %s:%d\n", (int) r, __FILE__, __LINE__); \
} \
} while (0)
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> ");
#define DEFAULT_SINK_NAME "OpenSL ES sink"
#define BLOCK_USEC (PA_USEC_PER_SEC * 2)
typedef struct pa_memblock_queue_t {
pa_memblock *memblock;
struct pa_memblock_queue_t* next;
} pa_memblock_queue;
struct userdata {
pa_core *core;
pa_module *module;
pa_sink *sink;
pa_thread *thread;
pa_thread_mq thread_mq;
pa_rtpoll *rtpoll;
pa_usec_t block_usec;
pa_usec_t timestamp;
pa_memchunk memchunk;
SLObjectItf engineObject;
SLEngineItf engineEngine;
// output mix interfaces
SLObjectItf outputMixObject;
// buffer queue player interfaces
SLObjectItf bqPlayerObject;
SLPlayItf bqPlayerPlay;
BufferQueueItf bqPlayerBufferQueue;
pa_memblock_queue* current;
pa_memblock_queue* last;
};
static const char* const valid_modargs[] = {
"sink_name",
"sink_properties",
"rate",
NULL
};
static int sink_process_msg(
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_SET_STATE:
if (pa_sink_get_state(u->sink) == PA_SINK_SUSPENDED || pa_sink_get_state(u->sink) == PA_SINK_INIT) {
if (PA_PTR_TO_UINT(data) == PA_SINK_RUNNING || PA_PTR_TO_UINT(data) == PA_SINK_IDLE)
u->timestamp = pa_rtclock_now();
}
break;
case PA_SINK_MESSAGE_GET_LATENCY: {
pa_usec_t now;
now = pa_rtclock_now();
*((pa_usec_t*) data) = u->timestamp > now ? u->timestamp - now : 0ULL;
return 0;
}
}
return pa_sink_process_msg(o, code, data, offset, chunk);
}
static void sink_update_requested_latency_cb(pa_sink *s) {
struct userdata *u;
size_t nbytes;
pa_sink_assert_ref(s);
pa_assert_se(u = s->userdata);
u->block_usec = pa_sink_get_requested_latency_within_thread(s);
if (u->block_usec == (pa_usec_t) -1)
u->block_usec = s->thread_info.max_latency;
nbytes = pa_usec_to_bytes(u->block_usec, &s->sample_spec);
pa_sink_set_max_rewind_within_thread(s, nbytes);
pa_sink_set_max_request_within_thread(s, nbytes);
}
static void pa_sles_callback(BufferQueueItf bq, void *context){
struct userdata* s = (struct userdata*) context;
pa_memblock_queue* next;
if (s->current != NULL){
if (s->current->memblock != NULL) pa_memblock_unref(s->current->memblock);
next = s->current->next;
free(s->current);
s->current = next;
}
}
static int pa_init_sles_player(struct userdata *s, SLint32 sl_rate)
{
if (s == NULL) return -1;
SLresult result;
// create engine
result = slCreateEngine(&(s->engineObject), 0, NULL, 0, NULL, NULL); checkResult(result);
result = (*s->engineObject)->Realize(s->engineObject, SL_BOOLEAN_FALSE); checkResult(result);
result = (*s->engineObject)->GetInterface(s->engineObject, SL_IID_ENGINE, &(s->engineEngine)); checkResult(result);
// create output mix
result = (*s->engineEngine)->CreateOutputMix(s->engineEngine, &(s->outputMixObject), 0, NULL, NULL); checkResult(result);
result = (*s->outputMixObject)->Realize(s->outputMixObject, SL_BOOLEAN_FALSE); checkResult(result);
// create audio player
SLDataLocator_OutputMix locator_outputmix;
locator_outputmix.locatorType = SL_DATALOCATOR_OUTPUTMIX;
locator_outputmix.outputMix = s->outputMixObject;
SLDataLocator_BufferQueue locator_bufferqueue;
locator_bufferqueue.locatorType = DATALOCATOR_BUFFERQUEUE;
locator_bufferqueue.numBuffers = 50;
if (sl_rate < SL_SAMPLINGRATE_8 || sl_rate > SL_SAMPLINGRATE_192) {
pa_log("Incompatible sample rate");
return -1;
}
SLDataFormat_PCM pcm;
pcm.formatType = SL_DATAFORMAT_PCM;
pcm.numChannels = 2;
pcm.samplesPerSec = sl_rate;
pcm.bitsPerSample = SL_PCMSAMPLEFORMAT_FIXED_16;
pcm.containerSize = 16;
pcm.channelMask = SL_SPEAKER_FRONT_LEFT | SL_SPEAKER_FRONT_RIGHT;
pcm.endianness = SL_BYTEORDER_LITTLEENDIAN;
SLDataSource audiosrc;
audiosrc.pLocator = &locator_bufferqueue;
audiosrc.pFormat = &pcm;
SLDataSink audiosnk;
audiosnk.pLocator = &locator_outputmix;
audiosnk.pFormat = NULL;
SLInterfaceID ids[1] = {IID_BUFFERQUEUE};
SLboolean flags[1] = {SL_BOOLEAN_TRUE};
result = (*s->engineEngine)->CreateAudioPlayer(s->engineEngine, &s->bqPlayerObject, &audiosrc, &audiosnk, 1, ids, flags); checkResult(result);
result = (*s->bqPlayerObject)->Realize(s->bqPlayerObject, SL_BOOLEAN_FALSE); checkResult(result);
result = (*s->bqPlayerObject)->GetInterface(s->bqPlayerObject, SL_IID_PLAY, &s->bqPlayerPlay); checkResult(result);
result = (*s->bqPlayerObject)->GetInterface(s->bqPlayerObject, IID_BUFFERQUEUE_USED, &s->bqPlayerBufferQueue); checkResult(result);
result = (*s->bqPlayerBufferQueue)->RegisterCallback(s->bqPlayerBufferQueue, pa_sles_callback, s); checkResult(result);
result = (*s->bqPlayerPlay)->SetPlayState(s->bqPlayerPlay, SL_PLAYSTATE_PLAYING); checkResult(result);
return 0;
}
static void pa_destroy_sles_player(struct userdata *s){
if (s == NULL) return;
(*s->bqPlayerPlay)->SetPlayState(s->bqPlayerPlay, SL_PLAYSTATE_STOPPED);
(*s->bqPlayerObject)->Destroy(s->bqPlayerObject);
(*s->outputMixObject)->Destroy(s->outputMixObject);
(*s->engineObject)->Destroy(s->engineObject);
}
static void process_render(struct userdata *u, pa_usec_t now) {
pa_memblock_queue* current_block;
size_t ate = 0;
pa_assert(u);
/* This is the configured latency. Sink inputs connected to us
might not have a single frame more than the maxrequest value
queued. Hence: at maximum read this many bytes from the sink
inputs. */
/* Fill the buffer up the latency size */
while (u->timestamp < now + u->block_usec) {
void *p;
pa_sink_render(u->sink, u->sink->thread_info.max_request, &u->memchunk);
p = pa_memblock_acquire(u->memchunk.memblock);
(*u->bqPlayerBufferQueue)->Enqueue(u->bqPlayerBufferQueue, (uint8_t*) p + u->memchunk.index, u->memchunk.length);
pa_memblock_release(u->memchunk.memblock);
u->timestamp += pa_bytes_to_usec(u->memchunk.length, &u->sink->sample_spec);
ate += u->memchunk.length;
current_block = malloc(sizeof(pa_memblock_queue));
memset(current_block, 0, sizeof(pa_memblock_queue));
current_block->memblock = u->memchunk.memblock;
if (u->current == NULL) { u->current = current_block; }
if (u->last == NULL) { u->last = current_block; }
else {
u->last->next = current_block;
u->last = current_block;
}
//pa_memblock_unref(u->memchunk.memblock);
pa_memchunk_reset(&u->memchunk);
if (ate >= u->sink->thread_info.max_request) break;
}
}
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);
u->timestamp = pa_rtclock_now();
for (;;) {
pa_usec_t now = 0;
int ret;
if (PA_SINK_IS_OPENED(u->sink->thread_info.state))
now = pa_rtclock_now();
if (PA_UNLIKELY(u->sink->thread_info.rewind_requested))
pa_sink_process_rewind(u->sink, 0);
/* Render some data and drop it immediately */
if (PA_SINK_IS_OPENED(u->sink->thread_info.state)) {
if (u->timestamp <= now)
process_render(u, now);
pa_rtpoll_set_timer_absolute(u->rtpoll, u->timestamp);
} else
pa_rtpoll_set_timer_disabled(u->rtpoll);
/* 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 getenv_int(const char * env, size_t min_len){
char * got_env = getenv(env);
int ret = 0;
if (got_env != NULL && strlen(got_env) >= min_len) ret = atoi(got_env); //"8000" is 4 symbols
return ret;
}
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;
size_t nbytes;
pa_assert(m);
if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
pa_log("Failed to parse module arguments.");
goto fail;
}
// High rate causes glitches on some devices, this is needed to prevent it
//ss.rate = 32000;
//ss.channels = 2;
//ss.format = PA_SAMPLE_S16LE;
//OK. That will allow users to define sampling rate under his responsibility
ss = m->core->default_sample_spec;
map = m->core->default_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;
}
//Needed. Don't touch
ss.channels = 2;
ss.format = PA_SAMPLE_S16LE;
m->userdata = u = pa_xnew0(struct userdata, 1);
int forceFormat = getenv_int("PROPERTY_OUTPUT_SAMPLE_RATE", 4); //"8000" is 4 symbols
if (forceFormat >= 8000 && forceFormat <= 192000) {
ss.rate = forceFormat;
pa_log_info("Sample rate was forced to be %u\n", ss.rate);
}
u->core = m->core;
u->module = m;
u->rtpoll = pa_rtpoll_new();
pa_thread_mq_init(&u->thread_mq, m->core->mainloop, u->rtpoll);
//Pulseaudio uses samples per sec but OpenSL ES uses samples per ms
if (pa_init_sles_player(u, ss.rate * 1000) < 0)
goto fail;
//int buff[2] = {0, 0};
//(*u->bqPlayerBufferQueue)->Enqueue(u->bqPlayerBufferQueue, buff, 1);
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, PA_SINK_LATENCY|PA_SINK_DYNAMIC_LATENCY);
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->update_requested_latency = sink_update_requested_latency_cb;
u->sink->userdata = u;
pa_sink_set_asyncmsgq(u->sink, u->thread_mq.inq);
pa_sink_set_rtpoll(u->sink, u->rtpoll);
u->block_usec = BLOCK_USEC;
nbytes = pa_usec_to_bytes(u->block_usec, &u->sink->sample_spec);
pa_sink_set_max_rewind(u->sink, nbytes);
pa_sink_set_max_request(u->sink, nbytes);
if (!(u->thread = pa_thread_new("sles-sink", thread_func, u))) {
pa_log("Failed to create thread.");
goto fail;
}
pa_sink_set_latency_range(u->sink, 0, BLOCK_USEC);
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);
}
if (u->engineObject){
pa_destroy_sles_player(u);
}
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);
}