/**
* OpenAL cross platform audio library
* Copyright (C) 2009 by Konstantinos Natsakis <konstantinos.natsakis@gmail.com>
* Copyright (C) 2010 by Chris Robinson <chris.kcat@gmail.com>
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
* Or go to http://www.gnu.org/copyleft/lgpl.html
*/
#include "config.h"
#include "backends/pulseaudio.h"
#include <poll.h>
#include <cstring>
#include <array>
#include <string>
#include <vector>
#include <atomic>
#include <thread>
#include <algorithm>
#include <condition_variable>
#include "alcmain.h"
#include "alu.h"
#include "alconfig.h"
#include "compat.h"
#include "alexcpt.h"
#include <pulse/pulseaudio.h>
namespace {
#ifdef HAVE_DYNLOAD
#define PULSE_FUNCS(MAGIC) \
MAGIC(pa_mainloop_new); \
MAGIC(pa_mainloop_free); \
MAGIC(pa_mainloop_set_poll_func); \
MAGIC(pa_mainloop_run); \
MAGIC(pa_mainloop_get_api); \
MAGIC(pa_context_new); \
MAGIC(pa_context_unref); \
MAGIC(pa_context_get_state); \
MAGIC(pa_context_disconnect); \
MAGIC(pa_context_set_state_callback); \
MAGIC(pa_context_errno); \
MAGIC(pa_context_connect); \
MAGIC(pa_context_get_server_info); \
MAGIC(pa_context_get_sink_info_by_name); \
MAGIC(pa_context_get_sink_info_list); \
MAGIC(pa_context_get_source_info_by_name); \
MAGIC(pa_context_get_source_info_list); \
MAGIC(pa_stream_new); \
MAGIC(pa_stream_unref); \
MAGIC(pa_stream_drop); \
MAGIC(pa_stream_get_state); \
MAGIC(pa_stream_peek); \
MAGIC(pa_stream_write); \
MAGIC(pa_stream_connect_record); \
MAGIC(pa_stream_connect_playback); \
MAGIC(pa_stream_readable_size); \
MAGIC(pa_stream_writable_size); \
MAGIC(pa_stream_is_corked); \
MAGIC(pa_stream_cork); \
MAGIC(pa_stream_is_suspended); \
MAGIC(pa_stream_get_device_name); \
MAGIC(pa_stream_get_latency); \
MAGIC(pa_stream_set_write_callback); \
MAGIC(pa_stream_set_buffer_attr); \
MAGIC(pa_stream_get_buffer_attr); \
MAGIC(pa_stream_get_sample_spec); \
MAGIC(pa_stream_get_time); \
MAGIC(pa_stream_set_read_callback); \
MAGIC(pa_stream_set_state_callback); \
MAGIC(pa_stream_set_moved_callback); \
MAGIC(pa_stream_set_underflow_callback); \
MAGIC(pa_stream_new_with_proplist); \
MAGIC(pa_stream_disconnect); \
MAGIC(pa_stream_set_buffer_attr_callback); \
MAGIC(pa_stream_begin_write); \
MAGIC(pa_channel_map_init_auto); \
MAGIC(pa_channel_map_parse); \
MAGIC(pa_channel_map_snprint); \
MAGIC(pa_channel_map_equal); \
MAGIC(pa_channel_map_superset); \
MAGIC(pa_operation_get_state); \
MAGIC(pa_operation_unref); \
MAGIC(pa_sample_spec_valid); \
MAGIC(pa_frame_size); \
MAGIC(pa_strerror); \
MAGIC(pa_path_get_filename); \
MAGIC(pa_get_binary_name); \
MAGIC(pa_xmalloc); \
MAGIC(pa_xfree);
void *pulse_handle;
#define MAKE_FUNC(x) decltype(x) * p##x
PULSE_FUNCS(MAKE_FUNC)
#undef MAKE_FUNC
#ifndef IN_IDE_PARSER
#define pa_mainloop_new ppa_mainloop_new
#define pa_mainloop_free ppa_mainloop_free
#define pa_mainloop_set_poll_func ppa_mainloop_set_poll_func
#define pa_mainloop_run ppa_mainloop_run
#define pa_mainloop_get_api ppa_mainloop_get_api
#define pa_context_new ppa_context_new
#define pa_context_unref ppa_context_unref
#define pa_context_get_state ppa_context_get_state
#define pa_context_disconnect ppa_context_disconnect
#define pa_context_set_state_callback ppa_context_set_state_callback
#define pa_context_errno ppa_context_errno
#define pa_context_connect ppa_context_connect
#define pa_context_get_server_info ppa_context_get_server_info
#define pa_context_get_sink_info_by_name ppa_context_get_sink_info_by_name
#define pa_context_get_sink_info_list ppa_context_get_sink_info_list
#define pa_context_get_source_info_by_name ppa_context_get_source_info_by_name
#define pa_context_get_source_info_list ppa_context_get_source_info_list
#define pa_stream_new ppa_stream_new
#define pa_stream_unref ppa_stream_unref
#define pa_stream_disconnect ppa_stream_disconnect
#define pa_stream_drop ppa_stream_drop
#define pa_stream_set_write_callback ppa_stream_set_write_callback
#define pa_stream_set_buffer_attr ppa_stream_set_buffer_attr
#define pa_stream_get_buffer_attr ppa_stream_get_buffer_attr
#define pa_stream_get_sample_spec ppa_stream_get_sample_spec
#define pa_stream_get_time ppa_stream_get_time
#define pa_stream_set_read_callback ppa_stream_set_read_callback
#define pa_stream_set_state_callback ppa_stream_set_state_callback
#define pa_stream_set_moved_callback ppa_stream_set_moved_callback
#define pa_stream_set_underflow_callback ppa_stream_set_underflow_callback
#define pa_stream_connect_record ppa_stream_connect_record
#define pa_stream_connect_playback ppa_stream_connect_playback
#define pa_stream_readable_size ppa_stream_readable_size
#define pa_stream_writable_size ppa_stream_writable_size
#define pa_stream_is_corked ppa_stream_is_corked
#define pa_stream_cork ppa_stream_cork
#define pa_stream_is_suspended ppa_stream_is_suspended
#define pa_stream_get_device_name ppa_stream_get_device_name
#define pa_stream_get_latency ppa_stream_get_latency
#define pa_stream_set_buffer_attr_callback ppa_stream_set_buffer_attr_callback
#define pa_stream_begin_write ppa_stream_begin_write*/
#define pa_channel_map_init_auto ppa_channel_map_init_auto
#define pa_channel_map_parse ppa_channel_map_parse
#define pa_channel_map_snprint ppa_channel_map_snprint
#define pa_channel_map_equal ppa_channel_map_equal
#define pa_channel_map_superset ppa_channel_map_superset
#define pa_operation_get_state ppa_operation_get_state
#define pa_operation_unref ppa_operation_unref
#define pa_sample_spec_valid ppa_sample_spec_valid
#define pa_frame_size ppa_frame_size
#define pa_strerror ppa_strerror
#define pa_stream_get_state ppa_stream_get_state
#define pa_stream_peek ppa_stream_peek
#define pa_stream_write ppa_stream_write
#define pa_xfree ppa_xfree
#define pa_path_get_filename ppa_path_get_filename
#define pa_get_binary_name ppa_get_binary_name
#define pa_xmalloc ppa_xmalloc
#endif /* IN_IDE_PARSER */
#endif
constexpr pa_channel_map MonoChanMap{
1, {PA_CHANNEL_POSITION_MONO}
}, StereoChanMap{
2, {PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT}
}, QuadChanMap{
4, {
PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT
}
}, X51ChanMap{
6, {
PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
PA_CHANNEL_POSITION_FRONT_CENTER, PA_CHANNEL_POSITION_LFE,
PA_CHANNEL_POSITION_SIDE_LEFT, PA_CHANNEL_POSITION_SIDE_RIGHT
}
}, X51RearChanMap{
6, {
PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
PA_CHANNEL_POSITION_FRONT_CENTER, PA_CHANNEL_POSITION_LFE,
PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT
}
}, X61ChanMap{
7, {
PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
PA_CHANNEL_POSITION_FRONT_CENTER, PA_CHANNEL_POSITION_LFE,
PA_CHANNEL_POSITION_REAR_CENTER,
PA_CHANNEL_POSITION_SIDE_LEFT, PA_CHANNEL_POSITION_SIDE_RIGHT
}
}, X71ChanMap{
8, {
PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
PA_CHANNEL_POSITION_FRONT_CENTER, PA_CHANNEL_POSITION_LFE,
PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT,
PA_CHANNEL_POSITION_SIDE_LEFT, PA_CHANNEL_POSITION_SIDE_RIGHT
}
};
size_t ChannelFromPulse(pa_channel_position_t chan)
{
switch(chan)
{
case PA_CHANNEL_POSITION_INVALID: break;
case PA_CHANNEL_POSITION_MONO: return FrontCenter;
case PA_CHANNEL_POSITION_FRONT_LEFT: return FrontLeft;
case PA_CHANNEL_POSITION_FRONT_RIGHT: return FrontRight;
case PA_CHANNEL_POSITION_FRONT_CENTER: return FrontCenter;
case PA_CHANNEL_POSITION_REAR_CENTER: return BackCenter;
case PA_CHANNEL_POSITION_REAR_LEFT: return BackLeft;
case PA_CHANNEL_POSITION_REAR_RIGHT: return BackRight;
case PA_CHANNEL_POSITION_LFE: return LFE;
case PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER: break;
case PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER: break;
case PA_CHANNEL_POSITION_SIDE_LEFT: return SideLeft;
case PA_CHANNEL_POSITION_SIDE_RIGHT: return SideRight;
case PA_CHANNEL_POSITION_AUX0: return Aux0;
case PA_CHANNEL_POSITION_AUX1: return Aux1;
case PA_CHANNEL_POSITION_AUX2: return Aux2;
case PA_CHANNEL_POSITION_AUX3: return Aux3;
case PA_CHANNEL_POSITION_AUX4: return Aux4;
case PA_CHANNEL_POSITION_AUX5: return Aux5;
case PA_CHANNEL_POSITION_AUX6: return Aux6;
case PA_CHANNEL_POSITION_AUX7: return Aux7;
case PA_CHANNEL_POSITION_AUX8: return Aux8;
case PA_CHANNEL_POSITION_AUX9: return Aux9;
case PA_CHANNEL_POSITION_AUX10: return Aux10;
case PA_CHANNEL_POSITION_AUX11: return Aux11;
case PA_CHANNEL_POSITION_AUX12: return Aux12;
case PA_CHANNEL_POSITION_AUX13: return Aux13;
case PA_CHANNEL_POSITION_AUX14: return Aux14;
case PA_CHANNEL_POSITION_AUX15: return Aux15;
case PA_CHANNEL_POSITION_AUX16: break;
case PA_CHANNEL_POSITION_AUX17: break;
case PA_CHANNEL_POSITION_AUX18: break;
case PA_CHANNEL_POSITION_AUX19: break;
case PA_CHANNEL_POSITION_AUX20: break;
case PA_CHANNEL_POSITION_AUX21: break;
case PA_CHANNEL_POSITION_AUX22: break;
case PA_CHANNEL_POSITION_AUX23: break;
case PA_CHANNEL_POSITION_AUX24: break;
case PA_CHANNEL_POSITION_AUX25: break;
case PA_CHANNEL_POSITION_AUX26: break;
case PA_CHANNEL_POSITION_AUX27: break;
case PA_CHANNEL_POSITION_AUX28: break;
case PA_CHANNEL_POSITION_AUX29: break;
case PA_CHANNEL_POSITION_AUX30: break;
case PA_CHANNEL_POSITION_AUX31: break;
case PA_CHANNEL_POSITION_TOP_CENTER: break;
case PA_CHANNEL_POSITION_TOP_FRONT_LEFT: return UpperFrontLeft;
case PA_CHANNEL_POSITION_TOP_FRONT_RIGHT: return UpperFrontRight;
case PA_CHANNEL_POSITION_TOP_FRONT_CENTER: break;
case PA_CHANNEL_POSITION_TOP_REAR_LEFT: return UpperBackLeft;
case PA_CHANNEL_POSITION_TOP_REAR_RIGHT: return UpperBackRight;
case PA_CHANNEL_POSITION_TOP_REAR_CENTER: break;
case PA_CHANNEL_POSITION_MAX: break;
}
throw al::backend_exception{ALC_INVALID_VALUE, "Unexpected channel enum %d", chan};
}
void SetChannelOrderFromMap(ALCdevice *device, const pa_channel_map &chanmap)
{
device->RealOut.ChannelIndex.fill(-1);
for(int i{0};i < chanmap.channels;++i)
device->RealOut.ChannelIndex[ChannelFromPulse(chanmap.map[i])] = i;
}
/* *grumble* Don't use enums for bitflags. */
inline pa_stream_flags_t operator|(pa_stream_flags_t lhs, pa_stream_flags_t rhs)
{ return pa_stream_flags_t(int(lhs) | int(rhs)); }
inline pa_stream_flags_t& operator|=(pa_stream_flags_t &lhs, pa_stream_flags_t rhs)
{
lhs = pa_stream_flags_t(int(lhs) | int(rhs));
return lhs;
}
inline pa_context_flags_t& operator|=(pa_context_flags_t &lhs, pa_context_flags_t rhs)
{
lhs = pa_context_flags_t(int(lhs) | int(rhs));
return lhs;
}
inline pa_stream_flags_t& operator&=(pa_stream_flags_t &lhs, int rhs)
{
lhs = pa_stream_flags_t(int(lhs) & rhs);
return lhs;
}
/* Global flags and properties */
pa_context_flags_t pulse_ctx_flags;
pa_mainloop *pulse_mainloop{nullptr};
std::mutex pulse_lock;
std::condition_variable pulse_condvar;
int pulse_poll_func(struct pollfd *ufds, unsigned long nfds, int timeout, void *userdata)
{
auto plock = static_cast<std::unique_lock<std::mutex>*>(userdata);
plock->unlock();
int r{poll(ufds, nfds, timeout)};
plock->lock();
return r;
}
int pulse_mainloop_thread()
{
SetRTPriority();
std::unique_lock<std::mutex> plock{pulse_lock};
pulse_mainloop = pa_mainloop_new();
pa_mainloop_set_poll_func(pulse_mainloop, pulse_poll_func, &plock);
pulse_condvar.notify_all();
int ret{};
pa_mainloop_run(pulse_mainloop, &ret);
pa_mainloop_free(pulse_mainloop);
pulse_mainloop = nullptr;
return ret;
}
/* PulseAudio Event Callbacks */
void context_state_callback(pa_context *context, void* /*pdata*/)
{
pa_context_state_t state{pa_context_get_state(context)};
if(state == PA_CONTEXT_READY || !PA_CONTEXT_IS_GOOD(state))
pulse_condvar.notify_all();
}
void stream_state_callback(pa_stream *stream, void* /*pdata*/)
{
pa_stream_state_t state{pa_stream_get_state(stream)};
if(state == PA_STREAM_READY || !PA_STREAM_IS_GOOD(state))
pulse_condvar.notify_all();
}
void stream_success_callback(pa_stream* /*stream*/, int /*success*/, void* /*pdata*/)
{
pulse_condvar.notify_all();
}
void wait_for_operation(pa_operation *op, std::unique_lock<std::mutex> &plock)
{
if(op)
{
while(pa_operation_get_state(op) == PA_OPERATION_RUNNING)
pulse_condvar.wait(plock);
pa_operation_unref(op);
}
}
pa_context *connect_context(std::unique_lock<std::mutex> &plock)
{
const char *name{"OpenAL Soft"};
const PathNamePair &binname = GetProcBinary();
if(!binname.fname.empty())
name = binname.fname.c_str();
if(UNLIKELY(!pulse_mainloop))
{
std::thread{pulse_mainloop_thread}.detach();
while(!pulse_mainloop)
pulse_condvar.wait(plock);
}
pa_context *context{pa_context_new(pa_mainloop_get_api(pulse_mainloop), name)};
if(!context) throw al::backend_exception{ALC_OUT_OF_MEMORY, "pa_context_new() failed"};
pa_context_set_state_callback(context, context_state_callback, nullptr);
int err;
if((err=pa_context_connect(context, nullptr, pulse_ctx_flags, nullptr)) >= 0)
{
pa_context_state_t state;
while((state=pa_context_get_state(context)) != PA_CONTEXT_READY)
{
if(!PA_CONTEXT_IS_GOOD(state))
{
err = pa_context_errno(context);
if(err > 0) err = -err;
break;
}
pulse_condvar.wait(plock);
}
}
pa_context_set_state_callback(context, nullptr, nullptr);
if(err < 0)
{
pa_context_unref(context);
throw al::backend_exception{ALC_INVALID_VALUE, "Context did not connect (%s)",
pa_strerror(err)};
}
return context;
}
void pulse_close(pa_context *context, pa_stream *stream)
{
std::lock_guard<std::mutex> _{pulse_lock};
if(stream)
{
pa_stream_set_state_callback(stream, nullptr, nullptr);
pa_stream_set_moved_callback(stream, nullptr, nullptr);
pa_stream_set_write_callback(stream, nullptr, nullptr);
pa_stream_set_buffer_attr_callback(stream, nullptr, nullptr);
pa_stream_disconnect(stream);
pa_stream_unref(stream);
}
pa_context_disconnect(context);
pa_context_unref(context);
}
struct DevMap {
std::string name;
std::string device_name;
};
bool checkName(const al::vector<DevMap> &list, const std::string &name)
{
return std::find_if(list.cbegin(), list.cend(),
[&name](const DevMap &entry) -> bool
{ return entry.name == name; }
) != list.cend();
}
al::vector<DevMap> PlaybackDevices;
al::vector<DevMap> CaptureDevices;
pa_stream *pulse_connect_stream(const char *device_name, std::unique_lock<std::mutex> &plock,
pa_context *context, pa_stream_flags_t flags, pa_buffer_attr *attr, pa_sample_spec *spec,
pa_channel_map *chanmap, BackendType type)
{
const char *stream_id{(type==BackendType::Playback) ? "Playback Stream" : "Capture Stream"};
pa_stream *stream{pa_stream_new(context, stream_id, spec, chanmap)};
if(!stream)
throw al::backend_exception{ALC_OUT_OF_MEMORY, "pa_stream_new() failed (%s)",
pa_strerror(pa_context_errno(context))};
pa_stream_set_state_callback(stream, stream_state_callback, nullptr);
int err{(type==BackendType::Playback) ?
pa_stream_connect_playback(stream, device_name, attr, flags, nullptr, nullptr) :
pa_stream_connect_record(stream, device_name, attr, flags)};
if(err < 0)
{
pa_stream_unref(stream);
throw al::backend_exception{ALC_INVALID_VALUE, "%s did not connect (%s)", stream_id,
pa_strerror(err)};
}
pa_stream_state_t state;
while((state=pa_stream_get_state(stream)) != PA_STREAM_READY)
{
if(!PA_STREAM_IS_GOOD(state))
{
int err{pa_context_errno(context)};
pa_stream_unref(stream);
throw al::backend_exception{ALC_INVALID_VALUE, "%s did not get ready (%s)", stream_id,
pa_strerror(err)};
}
pulse_condvar.wait(plock);
}
pa_stream_set_state_callback(stream, nullptr, nullptr);
return stream;
}
void device_sink_callback(pa_context*, const pa_sink_info *info, int eol, void*)
{
if(eol)
{
pulse_condvar.notify_all();
return;
}
/* Skip this device is if it's already in the list. */
if(std::find_if(PlaybackDevices.cbegin(), PlaybackDevices.cend(),
[info](const DevMap &entry) -> bool
{ return entry.device_name == info->name; }
) != PlaybackDevices.cend())
return;
/* Make sure the display name (description) is unique. Append a number
* counter as needed.
*/
int count{1};
std::string newname{info->description};
while(checkName(PlaybackDevices, newname))
{
newname = info->description;
newname += " #";
newname += std::to_string(++count);
}
PlaybackDevices.emplace_back(DevMap{std::move(newname), info->name});
DevMap &newentry = PlaybackDevices.back();
TRACE("Got device \"%s\", \"%s\"\n", newentry.name.c_str(), newentry.device_name.c_str());
}
void probePlaybackDevices()
{
PlaybackDevices.clear();
try {
std::unique_lock<std::mutex> plock{pulse_lock};
pa_context *context{connect_context(plock)};
const pa_stream_flags_t flags{PA_STREAM_FIX_FORMAT | PA_STREAM_FIX_RATE |
PA_STREAM_FIX_CHANNELS | PA_STREAM_DONT_MOVE};
pa_sample_spec spec{};
spec.format = PA_SAMPLE_S16NE;
spec.rate = 44100;
spec.channels = 2;
pa_stream *stream{pulse_connect_stream(nullptr, plock, context, flags, nullptr, &spec,
nullptr, BackendType::Playback)};
pa_operation *op{pa_context_get_sink_info_by_name(context,
pa_stream_get_device_name(stream), device_sink_callback, nullptr)};
wait_for_operation(op, plock);
pa_stream_disconnect(stream);
pa_stream_unref(stream);
stream = nullptr;
op = pa_context_get_sink_info_list(context, device_sink_callback, nullptr);
wait_for_operation(op, plock);
pa_context_disconnect(context);
pa_context_unref(context);
}
catch(std::exception &e) {
ERR("Error enumerating devices: %s\n", e.what());
}
}
void device_source_callback(pa_context*, const pa_source_info *info, int eol, void*)
{
if(eol)
{
pulse_condvar.notify_all();
return;
}
/* Skip this device is if it's already in the list. */
if(std::find_if(CaptureDevices.cbegin(), CaptureDevices.cend(),
[info](const DevMap &entry) -> bool
{ return entry.device_name == info->name; }
) != CaptureDevices.cend())
return;
/* Make sure the display name (description) is unique. Append a number
* counter as needed.
*/
int count{1};
std::string newname{info->description};
while(checkName(CaptureDevices, newname))
{
newname = info->description;
newname += " #";
newname += std::to_string(++count);
}
CaptureDevices.emplace_back(DevMap{std::move(newname), info->name});
DevMap &newentry = CaptureDevices.back();
TRACE("Got device \"%s\", \"%s\"\n", newentry.name.c_str(), newentry.device_name.c_str());
}
void probeCaptureDevices()
{
CaptureDevices.clear();
try {
std::unique_lock<std::mutex> plock{pulse_lock};
pa_context *context{connect_context(plock)};
const pa_stream_flags_t flags{PA_STREAM_FIX_FORMAT | PA_STREAM_FIX_RATE |
PA_STREAM_FIX_CHANNELS | PA_STREAM_DONT_MOVE};
pa_sample_spec spec{};
spec.format = PA_SAMPLE_S16NE;
spec.rate = 44100;
spec.channels = 1;
pa_stream *stream{pulse_connect_stream(nullptr, plock, context, flags, nullptr, &spec, nullptr,
BackendType::Capture)};
pa_operation *op{pa_context_get_source_info_by_name(context,
pa_stream_get_device_name(stream), device_source_callback, nullptr)};
wait_for_operation(op, plock);
pa_stream_disconnect(stream);
pa_stream_unref(stream);
stream = nullptr;
op = pa_context_get_source_info_list(context, device_source_callback, nullptr);
wait_for_operation(op, plock);
pa_context_disconnect(context);
pa_context_unref(context);
}
catch(std::exception &e) {
ERR("Error enumerating devices: %s\n", e.what());
}
}
struct PulsePlayback final : public BackendBase {
PulsePlayback(ALCdevice *device) noexcept : BackendBase{device} { }
~PulsePlayback() override;
static void bufferAttrCallbackC(pa_stream *stream, void *pdata);
void bufferAttrCallback(pa_stream *stream);
static void contextStateCallbackC(pa_context *context, void *pdata);
void contextStateCallback(pa_context *context);
static void streamStateCallbackC(pa_stream *stream, void *pdata);
void streamStateCallback(pa_stream *stream);
static void streamWriteCallbackC(pa_stream *stream, size_t nbytes, void *pdata);
void streamWriteCallback(pa_stream *stream, size_t nbytes);
static void sinkInfoCallbackC(pa_context *context, const pa_sink_info *info, int eol, void *pdata);
void sinkInfoCallback(pa_context *context, const pa_sink_info *info, int eol);
static void sinkNameCallbackC(pa_context *context, const pa_sink_info *info, int eol, void *pdata);
void sinkNameCallback(pa_context *context, const pa_sink_info *info, int eol);
static void streamMovedCallbackC(pa_stream *stream, void *pdata);
void streamMovedCallback(pa_stream *stream);
ALCenum open(const ALCchar *name) override;
ALCboolean reset() override;
ALCboolean start() override;
void stop() override;
ClockLatency getClockLatency() override;
void lock() override;
void unlock() override;
std::string mDeviceName;
pa_buffer_attr mAttr;
pa_sample_spec mSpec;
pa_stream *mStream{nullptr};
pa_context *mContext{nullptr};
ALuint mFrameSize{0u};
DEF_NEWDEL(PulsePlayback)
};
PulsePlayback::~PulsePlayback()
{
if(!mContext)
return;
pulse_close(mContext, mStream);
mContext = nullptr;
mStream = nullptr;
}
void PulsePlayback::bufferAttrCallbackC(pa_stream *stream, void *pdata)
{ static_cast<PulsePlayback*>(pdata)->bufferAttrCallback(stream); }
void PulsePlayback::bufferAttrCallback(pa_stream *stream)
{
/* FIXME: Update the device's UpdateSize (and/or BufferSize) using the new
* buffer attributes? Changing UpdateSize will change the ALC_REFRESH
* property, which probably shouldn't change between device resets. But
* leaving it alone means ALC_REFRESH will be off.
*/
mAttr = *(pa_stream_get_buffer_attr(stream));
TRACE("minreq=%d, tlength=%d, prebuf=%d\n", mAttr.minreq, mAttr.tlength, mAttr.prebuf);
}
void PulsePlayback::contextStateCallbackC(pa_context *context, void *pdata)
{ static_cast<PulsePlayback*>(pdata)->contextStateCallback(context); }
void PulsePlayback::contextStateCallback(pa_context *context)
{
if(pa_context_get_state(context) == PA_CONTEXT_FAILED)
{
ERR("Received context failure!\n");
aluHandleDisconnect(mDevice, "Playback state failure");
}
pulse_condvar.notify_all();
}
void PulsePlayback::streamStateCallbackC(pa_stream *stream, void *pdata)
{ static_cast<PulsePlayback*>(pdata)->streamStateCallback(stream); }
void PulsePlayback::streamStateCallback(pa_stream *stream)
{
if(pa_stream_get_state(stream) == PA_STREAM_FAILED)
{
ERR("Received stream failure!\n");
aluHandleDisconnect(mDevice, "Playback stream failure");
}
pulse_condvar.notify_all();
}
void PulsePlayback::streamWriteCallbackC(pa_stream *stream, size_t nbytes, void *pdata)
{ static_cast<PulsePlayback*>(pdata)->streamWriteCallback(stream, nbytes); }
void PulsePlayback::streamWriteCallback(pa_stream *stream, size_t nbytes)
{
void *buf{pa_xmalloc(nbytes)};
aluMixData(mDevice, buf, nbytes/mFrameSize);
int ret{pa_stream_write(stream, buf, nbytes, pa_xfree, 0, PA_SEEK_RELATIVE)};
if(UNLIKELY(ret != PA_OK))
ERR("Failed to write to stream: %d, %s\n", ret, pa_strerror(ret));
}
void PulsePlayback::sinkInfoCallbackC(pa_context *context, const pa_sink_info *info, int eol, void *pdata)
{ static_cast<PulsePlayback*>(pdata)->sinkInfoCallback(context, info, eol); }
void PulsePlayback::sinkInfoCallback(pa_context*, const pa_sink_info *info, int eol)
{
struct ChannelMap {
DevFmtChannels chans;
pa_channel_map map;
};
static constexpr std::array<ChannelMap,7> chanmaps{{
{ DevFmtX71, X71ChanMap },
{ DevFmtX61, X61ChanMap },
{ DevFmtX51, X51ChanMap },
{ DevFmtX51Rear, X51RearChanMap },
{ DevFmtQuad, QuadChanMap },
{ DevFmtStereo, StereoChanMap },
{ DevFmtMono, MonoChanMap }
}};
if(eol)
{
pulse_condvar.notify_all();
return;
}
auto chanmap = std::find_if(chanmaps.cbegin(), chanmaps.cend(),
[info](const ChannelMap &chanmap) -> bool
{ return pa_channel_map_superset(&info->channel_map, &chanmap.map); }
);
if(chanmap != chanmaps.cend())
{
if(!mDevice->Flags.get<ChannelsRequest>())
mDevice->FmtChans = chanmap->chans;
}
else
{
char chanmap_str[PA_CHANNEL_MAP_SNPRINT_MAX]{};
pa_channel_map_snprint(chanmap_str, sizeof(chanmap_str), &info->channel_map);
WARN("Failed to find format for channel map:\n %s\n", chanmap_str);
}
if(info->active_port)
TRACE("Active port: %s (%s)\n", info->active_port->name, info->active_port->description);
mDevice->IsHeadphones = (mDevice->FmtChans == DevFmtStereo &&
info->active_port && strcmp(info->active_port->name, "analog-output-headphones") == 0);
}
void PulsePlayback::sinkNameCallbackC(pa_context *context, const pa_sink_info *info, int eol, void *pdata)
{ static_cast<PulsePlayback*>(pdata)->sinkNameCallback(context, info, eol); }
void PulsePlayback::sinkNameCallback(pa_context*, const pa_sink_info *info, int eol)
{
if(eol)
{
pulse_condvar.notify_all();
return;
}
mDevice->DeviceName = info->description;
}
void PulsePlayback::streamMovedCallbackC(pa_stream *stream, void *pdata)
{ static_cast<PulsePlayback*>(pdata)->streamMovedCallback(stream); }
void PulsePlayback::streamMovedCallback(pa_stream *stream)
{
mDeviceName = pa_stream_get_device_name(stream);
TRACE("Stream moved to %s\n", mDeviceName.c_str());
}
ALCenum PulsePlayback::open(const ALCchar *name)
{
const char *pulse_name{nullptr};
const char *dev_name{nullptr};
if(name)
{
if(PlaybackDevices.empty())
probePlaybackDevices();
auto iter = std::find_if(PlaybackDevices.cbegin(), PlaybackDevices.cend(),
[name](const DevMap &entry) -> bool
{ return entry.name == name; }
);
if(iter == PlaybackDevices.cend())
throw al::backend_exception{ALC_INVALID_VALUE, "Device name \"%s\" not found", name};
pulse_name = iter->device_name.c_str();
dev_name = iter->name.c_str();
}
std::unique_lock<std::mutex> plock{pulse_lock};
mContext = connect_context(plock);
pa_context_set_state_callback(mContext, &PulsePlayback::contextStateCallbackC, this);
pa_stream_flags_t flags{PA_STREAM_FIX_FORMAT | PA_STREAM_FIX_RATE | PA_STREAM_FIX_CHANNELS};
if(!GetConfigValueBool(nullptr, "pulse", "allow-moves", 1))
flags |= PA_STREAM_DONT_MOVE;
pa_sample_spec spec{};
spec.format = PA_SAMPLE_S16NE;
spec.rate = 44100;
spec.channels = 2;
if(!pulse_name)
{
pulse_name = getenv("ALSOFT_PULSE_DEFAULT");
if(pulse_name && !pulse_name[0]) pulse_name = nullptr;
}
TRACE("Connecting to \"%s\"\n", pulse_name ? pulse_name : "(default)");
mStream = pulse_connect_stream(pulse_name, plock, mContext, flags, nullptr, &spec, nullptr,
BackendType::Playback);
pa_stream_set_moved_callback(mStream, &PulsePlayback::streamMovedCallbackC, this);
mFrameSize = pa_frame_size(pa_stream_get_sample_spec(mStream));
mDeviceName = pa_stream_get_device_name(mStream);
if(!dev_name)
{
pa_operation *op{pa_context_get_sink_info_by_name(mContext, mDeviceName.c_str(),
&PulsePlayback::sinkNameCallbackC, this)};
wait_for_operation(op, plock);
}
else
mDevice->DeviceName = dev_name;
return ALC_NO_ERROR;
}
ALCboolean PulsePlayback::reset()
{
std::unique_lock<std::mutex> plock{pulse_lock};
if(mStream)
{
pa_stream_set_state_callback(mStream, nullptr, nullptr);
pa_stream_set_moved_callback(mStream, nullptr, nullptr);
pa_stream_set_write_callback(mStream, nullptr, nullptr);
pa_stream_set_buffer_attr_callback(mStream, nullptr, nullptr);
pa_stream_disconnect(mStream);
pa_stream_unref(mStream);
mStream = nullptr;
}
pa_operation *op{pa_context_get_sink_info_by_name(mContext, mDeviceName.c_str(),
&PulsePlayback::sinkInfoCallbackC, this)};
wait_for_operation(op, plock);
pa_stream_flags_t flags{PA_STREAM_START_CORKED | PA_STREAM_INTERPOLATE_TIMING |
PA_STREAM_AUTO_TIMING_UPDATE | PA_STREAM_EARLY_REQUESTS};
if(!GetConfigValueBool(nullptr, "pulse", "allow-moves", 1))
flags |= PA_STREAM_DONT_MOVE;
if(GetConfigValueBool(mDevice->DeviceName.c_str(), "pulse", "adjust-latency", 0))
{
/* ADJUST_LATENCY can't be specified with EARLY_REQUESTS, for some
* reason. So if the user wants to adjust the overall device latency,
* we can't ask to get write signals as soon as minreq is reached.
*/
flags &= ~PA_STREAM_EARLY_REQUESTS;
flags |= PA_STREAM_ADJUST_LATENCY;
}
if(GetConfigValueBool(mDevice->DeviceName.c_str(), "pulse", "fix-rate", 0) ||
!mDevice->Flags.get<FrequencyRequest>())
flags |= PA_STREAM_FIX_RATE;
pa_channel_map chanmap{};
switch(mDevice->FmtChans)
{
case DevFmtMono:
chanmap = MonoChanMap;
break;
case DevFmtAmbi3D:
mDevice->FmtChans = DevFmtStereo;
/*fall-through*/
case DevFmtStereo:
chanmap = StereoChanMap;
break;
case DevFmtQuad:
chanmap = QuadChanMap;
break;
case DevFmtX51:
chanmap = X51ChanMap;
break;
case DevFmtX51Rear:
chanmap = X51RearChanMap;
break;
case DevFmtX61:
chanmap = X61ChanMap;
break;
case DevFmtX71:
chanmap = X71ChanMap;
break;
}
SetChannelOrderFromMap(mDevice, chanmap);
switch(mDevice->FmtType)
{
case DevFmtByte:
mDevice->FmtType = DevFmtUByte;
/* fall-through */
case DevFmtUByte:
mSpec.format = PA_SAMPLE_U8;
break;
case DevFmtUShort:
mDevice->FmtType = DevFmtShort;
/* fall-through */
case DevFmtShort:
mSpec.format = PA_SAMPLE_S16NE;
break;
case DevFmtUInt:
mDevice->FmtType = DevFmtInt;
/* fall-through */
case DevFmtInt:
mSpec.format = PA_SAMPLE_S32NE;
break;
case DevFmtFloat:
mSpec.format = PA_SAMPLE_FLOAT32NE;
break;
}
mSpec.rate = mDevice->Frequency;
mSpec.channels = mDevice->channelsFromFmt();
if(pa_sample_spec_valid(&mSpec) == 0)
throw al::backend_exception{ALC_INVALID_VALUE, "Invalid sample spec"};
mAttr.maxlength = -1;
mAttr.tlength = mDevice->BufferSize * pa_frame_size(&mSpec);
mAttr.prebuf = 0;
mAttr.minreq = mDevice->UpdateSize * pa_frame_size(&mSpec);
mAttr.fragsize = -1;
mStream = pulse_connect_stream(mDeviceName.c_str(), plock, mContext, flags, &mAttr, &mSpec,
&chanmap, BackendType::Playback);
pa_stream_set_state_callback(mStream, &PulsePlayback::streamStateCallbackC, this);
pa_stream_set_moved_callback(mStream, &PulsePlayback::streamMovedCallbackC, this);
mSpec = *(pa_stream_get_sample_spec(mStream));
mFrameSize = pa_frame_size(&mSpec);
if(mDevice->Frequency != mSpec.rate)
{
/* Server updated our playback rate, so modify the buffer attribs
* accordingly.
*/
const auto scale = static_cast<double>(mSpec.rate) / mDevice->Frequency;
const ALuint perlen{static_cast<ALuint>(clampd(scale*mDevice->UpdateSize + 0.5, 64.0,
8192.0))};
const ALuint buflen{static_cast<ALuint>(clampd(scale*mDevice->BufferSize + 0.5, perlen*2,
std::numeric_limits<int>::max()/mFrameSize))};
mAttr.maxlength = -1;
mAttr.tlength = buflen * mFrameSize;
mAttr.prebuf = 0;
mAttr.minreq = perlen * mFrameSize;
op = pa_stream_set_buffer_attr(mStream, &mAttr, stream_success_callback, nullptr);
wait_for_operation(op, plock);
mDevice->Frequency = mSpec.rate;
}
pa_stream_set_buffer_attr_callback(mStream, &PulsePlayback::bufferAttrCallbackC, this);
bufferAttrCallback(mStream);
mDevice->BufferSize = mAttr.tlength / mFrameSize;
mDevice->UpdateSize = mAttr.minreq / mFrameSize;
/* HACK: prebuf should be 0 as that's what we set it to. However on some
* systems it comes back as non-0, so we have to make sure the device will
* write enough audio to start playback. The lack of manual start control
* may have unintended consequences, but it's better than not starting at
* all.
*/
if(mAttr.prebuf != 0)
{
ALuint len{mAttr.prebuf / mFrameSize};
if(len <= mDevice->BufferSize)
ERR("Non-0 prebuf, %u samples (%u bytes), device has %u samples\n",
len, mAttr.prebuf, mDevice->BufferSize);
}
return ALC_TRUE;
}
ALCboolean PulsePlayback::start()
{
std::unique_lock<std::mutex> plock{pulse_lock};
pa_stream_set_write_callback(mStream, &PulsePlayback::streamWriteCallbackC, this);
pa_operation *op{pa_stream_cork(mStream, 0, stream_success_callback, nullptr)};
wait_for_operation(op, plock);
return ALC_TRUE;
}
void PulsePlayback::stop()
{
std::unique_lock<std::mutex> plock{pulse_lock};
pa_stream_set_write_callback(mStream, nullptr, nullptr);
pa_operation *op{pa_stream_cork(mStream, 1, stream_success_callback, nullptr)};
wait_for_operation(op, plock);
}
ClockLatency PulsePlayback::getClockLatency()
{
ClockLatency ret;
pa_usec_t latency;
int neg, err;
{ std::lock_guard<std::mutex> _{pulse_lock};
ret.ClockTime = GetDeviceClockTime(mDevice);
err = pa_stream_get_latency(mStream, &latency, &neg);
}
if(UNLIKELY(err != 0))
{
/* FIXME: if err = -PA_ERR_NODATA, it means we were called too soon
* after starting the stream and no timing info has been received from
* the server yet. Should we wait, possibly stalling the app, or give a
* dummy value? Either way, it shouldn't be 0. */
if(err != -PA_ERR_NODATA)
ERR("Failed to get stream latency: 0x%x\n", err);
latency = 0;
neg = 0;
}
else if(UNLIKELY(neg))
latency = 0;
ret.Latency = std::chrono::microseconds{latency};
return ret;
}
void PulsePlayback::lock()
{ pulse_lock.lock(); }
void PulsePlayback::unlock()
{ pulse_lock.unlock(); }
struct PulseCapture final : public BackendBase {
PulseCapture(ALCdevice *device) noexcept : BackendBase{device} { }
~PulseCapture() override;
static void contextStateCallbackC(pa_context *context, void *pdata);
void contextStateCallback(pa_context *context);
static void streamStateCallbackC(pa_stream *stream, void *pdata);
void streamStateCallback(pa_stream *stream);
static void sourceNameCallbackC(pa_context *context, const pa_source_info *info, int eol, void *pdata);
void sourceNameCallback(pa_context *context, const pa_source_info *info, int eol);
static void streamMovedCallbackC(pa_stream *stream, void *pdata);
void streamMovedCallback(pa_stream *stream);
ALCenum open(const ALCchar *name) override;
ALCboolean start() override;
void stop() override;
ALCenum captureSamples(ALCvoid *buffer, ALCuint samples) override;
ALCuint availableSamples() override;
ClockLatency getClockLatency() override;
void lock() override;
void unlock() override;
std::string mDeviceName;
ALCuint mLastReadable{0u};
al::byte mSilentVal{};
al::span<const al::byte> mCapBuffer;
ssize_t mCapLen{0};
pa_buffer_attr mAttr{};
pa_sample_spec mSpec{};
pa_stream *mStream{nullptr};
pa_context *mContext{nullptr};
DEF_NEWDEL(PulseCapture)
};
PulseCapture::~PulseCapture()
{
if(!mContext)
return;
pulse_close(mContext, mStream);
mContext = nullptr;
mStream = nullptr;
}
void PulseCapture::contextStateCallbackC(pa_context *context, void *pdata)
{ static_cast<PulseCapture*>(pdata)->contextStateCallback(context); }
void PulseCapture::contextStateCallback(pa_context *context)
{
if(pa_context_get_state(context) == PA_CONTEXT_FAILED)
{
ERR("Received context failure!\n");
aluHandleDisconnect(mDevice, "Capture state failure");
}
pulse_condvar.notify_all();
}
void PulseCapture::streamStateCallbackC(pa_stream *stream, void *pdata)
{ static_cast<PulseCapture*>(pdata)->streamStateCallback(stream); }
void PulseCapture::streamStateCallback(pa_stream *stream)
{
if(pa_stream_get_state(stream) == PA_STREAM_FAILED)
{
ERR("Received stream failure!\n");
aluHandleDisconnect(mDevice, "Capture stream failure");
}
pulse_condvar.notify_all();
}
void PulseCapture::sourceNameCallbackC(pa_context *context, const pa_source_info *info, int eol, void *pdata)
{ static_cast<PulseCapture*>(pdata)->sourceNameCallback(context, info, eol); }
void PulseCapture::sourceNameCallback(pa_context*, const pa_source_info *info, int eol)
{
if(eol)
{
pulse_condvar.notify_all();
return;
}
mDevice->DeviceName = info->description;
}
void PulseCapture::streamMovedCallbackC(pa_stream *stream, void *pdata)
{ static_cast<PulseCapture*>(pdata)->streamMovedCallback(stream); }
void PulseCapture::streamMovedCallback(pa_stream *stream)
{
mDeviceName = pa_stream_get_device_name(stream);
TRACE("Stream moved to %s\n", mDeviceName.c_str());
}
ALCenum PulseCapture::open(const ALCchar *name)
{
const char *pulse_name{nullptr};
if(name)
{
if(CaptureDevices.empty())
probeCaptureDevices();
auto iter = std::find_if(CaptureDevices.cbegin(), CaptureDevices.cend(),
[name](const DevMap &entry) -> bool
{ return entry.name == name; }
);
if(iter == CaptureDevices.cend())
throw al::backend_exception{ALC_INVALID_VALUE, "Device name \"%s\" not found", name};
pulse_name = iter->device_name.c_str();
mDevice->DeviceName = iter->name;
}
std::unique_lock<std::mutex> plock{pulse_lock};
mContext = connect_context(plock);
pa_context_set_state_callback(mContext, &PulseCapture::contextStateCallbackC, this);
pa_channel_map chanmap{};
switch(mDevice->FmtChans)
{
case DevFmtMono:
chanmap = MonoChanMap;
break;
case DevFmtStereo:
chanmap = StereoChanMap;
break;
case DevFmtQuad:
chanmap = QuadChanMap;
break;
case DevFmtX51:
chanmap = X51ChanMap;
break;
case DevFmtX51Rear:
chanmap = X51RearChanMap;
break;
case DevFmtX61:
chanmap = X61ChanMap;
break;
case DevFmtX71:
chanmap = X71ChanMap;
break;
case DevFmtAmbi3D:
throw al::backend_exception{ALC_INVALID_VALUE, "%s capture samples not supported",
DevFmtChannelsString(mDevice->FmtChans)};
}
SetChannelOrderFromMap(mDevice, chanmap);
switch(mDevice->FmtType)
{
case DevFmtUByte:
mSilentVal = al::byte(0x80);
mSpec.format = PA_SAMPLE_U8;
break;
case DevFmtShort:
mSpec.format = PA_SAMPLE_S16NE;
break;
case DevFmtInt:
mSpec.format = PA_SAMPLE_S32NE;
break;
case DevFmtFloat:
mSpec.format = PA_SAMPLE_FLOAT32NE;
break;
case DevFmtByte:
case DevFmtUShort:
case DevFmtUInt:
throw al::backend_exception{ALC_INVALID_VALUE, "%s capture samples not supported",
DevFmtTypeString(mDevice->FmtType)};
}
mSpec.rate = mDevice->Frequency;
mSpec.channels = mDevice->channelsFromFmt();
if(pa_sample_spec_valid(&mSpec) == 0)
throw al::backend_exception{ALC_INVALID_VALUE, "Invalid sample format"};
ALuint samples{mDevice->BufferSize};
samples = maxu(samples, 100 * mDevice->Frequency / 1000);
mAttr.minreq = -1;
mAttr.prebuf = -1;
mAttr.maxlength = samples * pa_frame_size(&mSpec);
mAttr.tlength = -1;
mAttr.fragsize = minu(samples, 50*mDevice->Frequency/1000) * pa_frame_size(&mSpec);
pa_stream_flags_t flags{PA_STREAM_START_CORKED | PA_STREAM_ADJUST_LATENCY};
if(!GetConfigValueBool(nullptr, "pulse", "allow-moves", 1))
flags |= PA_STREAM_DONT_MOVE;
TRACE("Connecting to \"%s\"\n", pulse_name ? pulse_name : "(default)");
mStream = pulse_connect_stream(pulse_name, plock, mContext, flags, &mAttr, &mSpec, &chanmap,
BackendType::Capture);
pa_stream_set_moved_callback(mStream, &PulseCapture::streamMovedCallbackC, this);
pa_stream_set_state_callback(mStream, &PulseCapture::streamStateCallbackC, this);
mDeviceName = pa_stream_get_device_name(mStream);
if(mDevice->DeviceName.empty())
{
pa_operation *op{pa_context_get_source_info_by_name(mContext, mDeviceName.c_str(),
&PulseCapture::sourceNameCallbackC, this)};
wait_for_operation(op, plock);
}
return ALC_NO_ERROR;
}
ALCboolean PulseCapture::start()
{
std::unique_lock<std::mutex> plock{pulse_lock};
pa_operation *op{pa_stream_cork(mStream, 0, stream_success_callback, nullptr)};
wait_for_operation(op, plock);
return ALC_TRUE;
}
void PulseCapture::stop()
{
std::unique_lock<std::mutex> plock{pulse_lock};
pa_operation *op{pa_stream_cork(mStream, 1, stream_success_callback, nullptr)};
wait_for_operation(op, plock);
}
ALCenum PulseCapture::captureSamples(ALCvoid *buffer, ALCuint samples)
{
al::span<al::byte> dstbuf{static_cast<al::byte*>(buffer), samples * pa_frame_size(&mSpec)};
/* Capture is done in fragment-sized chunks, so we loop until we get all
* that's available */
mLastReadable -= dstbuf.size();
std::lock_guard<std::mutex> _{pulse_lock};
while(!dstbuf.empty())
{
if(mCapBuffer.empty())
{
if(UNLIKELY(!mDevice->Connected.load(std::memory_order_acquire)))
break;
const pa_stream_state_t state{pa_stream_get_state(mStream)};
if(UNLIKELY(!PA_STREAM_IS_GOOD(state)))
{
aluHandleDisconnect(mDevice, "Bad capture state: %u", state);
break;
}
const void *capbuf;
size_t caplen;
if(UNLIKELY(pa_stream_peek(mStream, &capbuf, &caplen) < 0))
{
aluHandleDisconnect(mDevice, "Failed retrieving capture samples: %s",
pa_strerror(pa_context_errno(mContext)));
break;
}
if(caplen == 0) break;
if(UNLIKELY(!capbuf))
mCapLen = -static_cast<ssize_t>(caplen);
else
mCapLen = static_cast<ssize_t>(caplen);
mCapBuffer = {static_cast<const al::byte*>(capbuf), caplen};
}
const size_t rem{minz(dstbuf.size(), mCapBuffer.size())};
if(UNLIKELY(mCapLen < 0))
std::fill_n(dstbuf.begin(), rem, mSilentVal);
else
std::copy_n(mCapBuffer.begin(), rem, dstbuf.begin());
dstbuf = dstbuf.subspan(rem);
mCapBuffer = mCapBuffer.subspan(rem);
if(mCapBuffer.empty())
{
pa_stream_drop(mStream);
mCapLen = 0;
}
}
if(!dstbuf.empty())
std::fill(dstbuf.begin(), dstbuf.end(), mSilentVal);
return ALC_NO_ERROR;
}
ALCuint PulseCapture::availableSamples()
{
size_t readable{mCapBuffer.size()};
if(mDevice->Connected.load(std::memory_order_acquire))
{
std::lock_guard<std::mutex> _{pulse_lock};
size_t got{pa_stream_readable_size(mStream)};
if(static_cast<ssize_t>(got) < 0)
{
ERR("pa_stream_readable_size() failed: %s\n", pa_strerror(got));
aluHandleDisconnect(mDevice, "Failed getting readable size: %s", pa_strerror(got));
}
else
{
const auto caplen = static_cast<size_t>(std::abs(mCapLen));
if(got > caplen) readable += got - caplen;
}
}
readable = std::min<size_t>(readable, std::numeric_limits<ALCuint>::max());
mLastReadable = std::max(mLastReadable, static_cast<ALCuint>(readable));
return mLastReadable / pa_frame_size(&mSpec);
}
ClockLatency PulseCapture::getClockLatency()
{
ClockLatency ret;
pa_usec_t latency;
int neg, err;
{ std::lock_guard<std::mutex> _{pulse_lock};
ret.ClockTime = GetDeviceClockTime(mDevice);
err = pa_stream_get_latency(mStream, &latency, &neg);
}
if(UNLIKELY(err != 0))
{
ERR("Failed to get stream latency: 0x%x\n", err);
latency = 0;
neg = 0;
}
else if(UNLIKELY(neg))
latency = 0;
ret.Latency = std::chrono::microseconds{latency};
return ret;
}
void PulseCapture::lock()
{ pulse_lock.lock(); }
void PulseCapture::unlock()
{ pulse_lock.unlock(); }
} // namespace
bool PulseBackendFactory::init()
{
#ifdef HAVE_DYNLOAD
if(!pulse_handle)
{
bool ret{true};
std::string missing_funcs;
#ifdef _WIN32
#define PALIB "libpulse-0.dll"
#elif defined(__APPLE__) && defined(__MACH__)
#define PALIB "libpulse.0.dylib"
#else
#define PALIB "libpulse.so.0"
#endif
pulse_handle = LoadLib(PALIB);
if(!pulse_handle)
{
WARN("Failed to load %s\n", PALIB);
return false;
}
#define LOAD_FUNC(x) do { \
p##x = reinterpret_cast<decltype(p##x)>(GetSymbol(pulse_handle, #x)); \
if(!(p##x)) { \
ret = false; \
missing_funcs += "\n" #x; \
} \
} while(0)
PULSE_FUNCS(LOAD_FUNC)
#undef LOAD_FUNC
if(!ret)
{
WARN("Missing expected functions:%s\n", missing_funcs.c_str());
CloseLib(pulse_handle);
pulse_handle = nullptr;
return false;
}
}
#endif /* HAVE_DYNLOAD */
pulse_ctx_flags = PA_CONTEXT_NOFLAGS;
if(!GetConfigValueBool(nullptr, "pulse", "spawn-server", 1))
pulse_ctx_flags |= PA_CONTEXT_NOAUTOSPAWN;
try {
std::unique_lock<std::mutex> plock{pulse_lock};
pa_context *context{connect_context(plock)};
pa_context_disconnect(context);
pa_context_unref(context);
return true;
}
catch(...) {
return false;
}
}
bool PulseBackendFactory::querySupport(BackendType type)
{ return type == BackendType::Playback || type == BackendType::Capture; }
void PulseBackendFactory::probe(DevProbe type, std::string *outnames)
{
auto add_device = [outnames](const DevMap &entry) -> void
{
/* +1 to also append the null char (to ensure a null-separated list and
* double-null terminated list).
*/
outnames->append(entry.name.c_str(), entry.name.length()+1);
};
switch(type)
{
case DevProbe::Playback:
probePlaybackDevices();
std::for_each(PlaybackDevices.cbegin(), PlaybackDevices.cend(), add_device);
break;
case DevProbe::Capture:
probeCaptureDevices();
std::for_each(CaptureDevices.cbegin(), CaptureDevices.cend(), add_device);
break;
}
}
BackendPtr PulseBackendFactory::createBackend(ALCdevice *device, BackendType type)
{
if(type == BackendType::Playback)
return BackendPtr{new PulsePlayback{device}};
if(type == BackendType::Capture)
return BackendPtr{new PulseCapture{device}};
return nullptr;
}
BackendFactory &PulseBackendFactory::getFactory()
{
static PulseBackendFactory factory{};
return factory;
}