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rdpsnd_pulse.c
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/* -*- c-basic-offset: 8 -*-
rdesktop: A Remote Desktop Protocol client.
Sound Channel Process Functions - PulseAudio
Copyright (C) Krupen'ko Nikita <[email protected]> 2010
Copyright (C) Henrik Andersson <[email protected]> 2017
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "rdesktop.h"
#include "rdpsnd.h"
#include "rdpsnd_dsp.h"
#include <unistd.h>
#include <fcntl.h>
#include <assert.h>
#include <errno.h>
#include <sys/time.h>
#include <pulse/version.h>
#ifndef PA_CHECK_VERSION
#define PA_CHECK_VERSION(major, minor, micro) (0)
#endif
#include <pulse/thread-mainloop.h>
#if PA_CHECK_VERSION(0,9,11)
#include <pulse/proplist.h>
#endif
#include <pulse/context.h>
#include <pulse/sample.h>
#include <pulse/stream.h>
#include <pulse/error.h>
#define DEFAULTDEVICE NULL
/* Messages that may be sent from the PulseAudio thread */
enum RDPSND_PULSE_MSG_TYPE
{
RDPSND_PULSE_OUT_AVAIL, // Output space available in output stream
RDPSND_PULSE_IN_AVAIL, // Input data available in input stream
RDPSND_PULSE_OUT_ERR, // An error occured in the output stream
RDPSND_PULSE_IN_ERR // An error occured in the input strem
};
static pa_threaded_mainloop *mainloop;
#if PA_CHECK_VERSION(0,9,11)
static pa_proplist *proplist;
#endif
static pa_context *context;
static pa_stream *playback_stream;
static pa_stream *capture_stream;
static int pulse_ctl[2] = { -1, -1 }; // Pipe for comminicating with main thread
/* Streams states for the possibility of the proper reinitialization */
static RD_BOOL playback_started = False;
static RD_BOOL capture_started = False;
/* Device's parameters */
static const char *device;
static int playback_channels;
static int playback_samplerate;
static int playback_samplewidth;
static int capture_channels;
static int capture_samplerate;
static int capture_samplewidth;
/* Internal audio buffer sizes (latency) */
static const int playback_latency_part = 10; // Playback latency (in part of second)
static const int capture_latency_part = 10; // Capture latency (in part of second)
/* Capture buffer */
static void *capture_buf = NULL;
static size_t capture_buf_size = 0;
static RD_BOOL pulse_init(void);
static void pulse_deinit(void);
static RD_BOOL pulse_context_init(void);
static void pulse_context_deinit(void);
static RD_BOOL pulse_stream_open(pa_stream ** stream, int channels, int samplerate, int samplewidth,
pa_stream_flags_t flags);
static void pulse_stream_close(pa_stream ** stream);
static void pulse_send_msg(int fd, char message);
static RD_BOOL pulse_playback_start(void);
static RD_BOOL pulse_playback_stop(void);
static RD_BOOL pulse_playback_set_audio(int channels, int samplerate, int samplewidth);
static RD_BOOL pulse_play(void);
static RD_BOOL pulse_capture_start(void);
static RD_BOOL pulse_capture_stop(void);
static RD_BOOL pulse_capture_set_audio(int channels, int samplerate, int samplewidth);
static RD_BOOL pulse_record(void);
static RD_BOOL pulse_recover(pa_stream ** stream);
/* Callbacks for the PulseAudio events */
static void pulse_context_state_cb(pa_context * c, void *userdata);
static void pulse_stream_state_cb(pa_stream * p, void *userdata);
static void pulse_write_cb(pa_stream *, size_t nbytes, void *userdata);
static void pulse_read_cb(pa_stream * p, size_t nbytes, void *userdata);
static void pulse_cork_cb(pa_stream * p, int success, void *userdata);
static void pulse_flush_cb(pa_stream * p, int success, void *userdata);
static void pulse_update_timing_cb(pa_stream * p, int success, void *userdata);
static RD_BOOL
pulse_init(void)
{
RD_BOOL ret = False;
do
{
/* PulsaAudio mainloop thread initialization */
mainloop = pa_threaded_mainloop_new();
if (mainloop == NULL)
{
logger(Sound, Error,
"pulse_init(), Error creating PulseAudio threaded mainloop");
break;
}
if (pa_threaded_mainloop_start(mainloop) != 0)
{
logger(Sound, Error,
"pulse_init(), Error starting PulseAudio threaded mainloop");
break;
}
#if PA_CHECK_VERSION(0,9,11)
/* PulseAudio proplist initialization */
proplist = pa_proplist_new();
if (proplist == NULL)
{
logger(Sound, Error, "pulse_init(), Error creating PulseAudio proplist");
break;
}
if (pa_proplist_sets(proplist, PA_PROP_APPLICATION_NAME, "rdesktop") != 0)
{
logger(Sound, Error,
"pulse_init(), Error setting option to PulseAudio proplist");
break;
}
#endif
if (pulse_context_init() != True)
break;
ret = True;
}
while (0);
if (ret != True)
pulse_deinit();
return ret;
}
static void
pulse_deinit(void)
{
pulse_stream_close(&capture_stream);
pulse_stream_close(&playback_stream);
pulse_context_deinit();
#if PA_CHECK_VERSION(0,9,11)
if (proplist != NULL)
{
pa_proplist_free(proplist);
proplist = NULL;
}
#endif
if (mainloop != NULL)
{
pa_threaded_mainloop_stop(mainloop);
pa_threaded_mainloop_free(mainloop);
mainloop = NULL;
}
}
static RD_BOOL
pulse_context_init(void)
{
pa_context_flags_t flags;
pa_context_state_t context_state;
int err;
RD_BOOL ret = False;
pa_threaded_mainloop_lock(mainloop);
do
{
/* Pipe for the control information from the audio thread */
if (pipe(pulse_ctl) != 0)
{
logger(Sound, Error, "pulse_context_init(), pipe: %s", strerror(errno));
pulse_ctl[0] = pulse_ctl[1] = -1;
break;
}
if (fcntl(pulse_ctl[0], F_SETFL, O_NONBLOCK) == -1)
{
logger(Sound, Error, "pulse_context_init(), fcntl: %s", strerror(errno));
break;
}
#if PA_CHECK_VERSION(0,9,11)
context =
pa_context_new_with_proplist(pa_threaded_mainloop_get_api(mainloop), NULL,
proplist);
#else
context = pa_context_new(pa_threaded_mainloop_get_api(mainloop), "rdesktop");
#endif
if (context == NULL)
{
logger(Sound, Error,
"pulse_context_init(), error creating PulseAudio context");
break;
}
pa_context_set_state_callback(context, pulse_context_state_cb, mainloop);
/* PulseAudio context connection */
#if PA_CHECK_VERSION(0,9,15)
flags = PA_CONTEXT_NOFAIL;
#else
flags = 0;
#endif
if (pa_context_connect(context, NULL, flags, NULL) != 0)
{
err = pa_context_errno(context);
logger(Sound, Error, "pulse_context_init(), %s", pa_strerror(err));
break;
}
do
{
context_state = pa_context_get_state(context);
if (context_state == PA_CONTEXT_READY || context_state == PA_CONTEXT_FAILED)
break;
else
pa_threaded_mainloop_wait(mainloop);
}
while (1);
if (context_state != PA_CONTEXT_READY)
{
err = pa_context_errno(context);
logger(Sound, Error, "pulse_context_init(), %s", pa_strerror(err));
break;
}
ret = True;
}
while (0);
pa_threaded_mainloop_unlock(mainloop);
return ret;
}
static void
pulse_context_deinit(void)
{
int err;
if (context != NULL)
{
pa_threaded_mainloop_lock(mainloop);
pa_context_disconnect(context);
pa_context_unref(context);
context = NULL;
pa_threaded_mainloop_unlock(mainloop);
}
if (pulse_ctl[0] != -1)
{
do
err = close(pulse_ctl[0]);
while (err == -1 && errno == EINTR);
if (err == -1)
logger(Sound, Error, "pulse_context_deinit(), close: %s", strerror(errno));
pulse_ctl[0] = -1;
}
if (pulse_ctl[1] != -1)
{
do
err = close(pulse_ctl[1]);
while (err == -1 && errno == EINTR);
if (err == -1)
logger(Sound, Error, "pulse_context_deinit(), close: %s", strerror(errno));
pulse_ctl[1] = 0;
}
}
static RD_BOOL
pulse_stream_open(pa_stream ** stream, int channels, int samplerate, int samplewidth,
pa_stream_flags_t flags)
{
pa_sample_spec samples;
pa_buffer_attr buffer_attr;
pa_stream_state_t state;
int err;
RD_BOOL ret = False;
assert(stream != NULL);
assert(stream == &playback_stream || stream == &capture_stream);
logger(Sound, Debug, "pulse_stream_open(), channels=%d, samplerate=%d, samplewidth=%d",
channels, samplerate, samplewidth);
pa_threaded_mainloop_lock(mainloop);
do
{
/* PulseAudio sample format initialization */
#if PA_CHECK_VERSION(0,9,13)
if (pa_sample_spec_init(&samples) == NULL)
{
logger(Sound, Error,
"pulse_stream_open(), error initializing PulseAudio sample format");
break;
}
#endif
if (samplewidth == 2)
samples.format = PA_SAMPLE_S16LE;
else if (samplewidth == 1)
samples.format = PA_SAMPLE_U8;
else
{
logger(Sound, Error,
"pulse_stream_open(), wrong samplewidth for the PulseAudio stream: %d",
samplewidth);
break;
}
samples.rate = samplerate;
samples.channels = channels;
if (!pa_sample_spec_valid(&samples))
{
logger(Sound, Error,
"pulse_stream_open(), Invalid PulseAudio sample format");
break;
}
/* PulseAudio stream creation */
#if PA_CHECK_VERSION(0,9,11)
if (stream == &playback_stream)
*stream =
pa_stream_new_with_proplist(context, "Playback Stream", &samples,
NULL, proplist);
else
*stream =
pa_stream_new_with_proplist(context, "Capture Stream", &samples,
NULL, proplist);
#else
if (stream == &playback_stream)
*stream = pa_stream_new(context, "Playback Stream", &samples, NULL);
else
*stream = pa_stream_new(context, "Capture Stream", &samples, NULL);
#endif
if (*stream == NULL)
{
err = pa_context_errno(context);
logger(Sound, Error, "pulse_stream_open(), pa_stream_new: %s",
pa_strerror(err));
break;
}
pa_stream_set_state_callback(*stream, pulse_stream_state_cb, mainloop);
buffer_attr.maxlength = (uint32_t) - 1;
buffer_attr.minreq = (uint32_t) - 1;
buffer_attr.prebuf = (uint32_t) - 1;
buffer_attr.tlength = (uint32_t) - 1;
buffer_attr.fragsize = (uint32_t) - 1;
/* PulseAudio stream connection */
if (stream == &playback_stream)
{
#if PA_CHECK_VERSION(0,9,0)
buffer_attr.tlength =
pa_usec_to_bytes(1000000 / playback_latency_part, &samples);
#else
buffer_attr.tlength =
(samples.rate / playback_latency_part) * samples.channels *
(samples.format == PA_SAMPLE_S16LE ? 2 : 1);
#endif
buffer_attr.prebuf = 0;
buffer_attr.maxlength = buffer_attr.tlength;
}
else
{
#if PA_CHECK_VERSION(0,9,0)
buffer_attr.fragsize =
pa_usec_to_bytes(1000000 / capture_latency_part, &samples);
#else
buffer_attr.fragsize =
(samples.rate / capture_latency_part) * samples.channels *
(samples.format == PA_SAMPLE_S16LE ? 2 : 1);
#endif
buffer_attr.maxlength = buffer_attr.fragsize;
}
#if !PA_CHECK_VERSION(0,9,16)
buffer_attr.minreq = (samples.rate / 50) * samples.channels * (samples.format == PA_SAMPLE_S16LE ? 2 : 1); // 20 ms
#endif
if (stream == &playback_stream)
err = pa_stream_connect_playback(*stream, device, &buffer_attr, flags, NULL,
NULL);
else
err = pa_stream_connect_record(*stream, device, &buffer_attr, flags);
if (err)
{
err = pa_context_errno(context);
logger(Sound, Error,
"pulse_stream_open(), error connecting PulseAudio stream: %s",
pa_strerror(err));
break;
}
do
{
state = pa_stream_get_state(*stream);
if (state == PA_STREAM_READY || state == PA_STREAM_FAILED)
break;
else
pa_threaded_mainloop_wait(mainloop);
}
while (1);
if (state != PA_STREAM_READY)
{
err = pa_context_errno(context);
logger(Sound, Error,
"pulse_stream_open(), error connecting PulseAudio stream: %s",
pa_strerror(err));
break;
}
#if PA_CHECK_VERSION(0,9,8)
logger(Sound, Debug, "pulse_stream_open(), opened PulseAudio stream on device %s",
pa_stream_get_device_name(*stream));
#endif
#if PA_CHECK_VERSION(0,9,0)
const pa_buffer_attr *res_ba;
res_ba = pa_stream_get_buffer_attr(*stream);
logger(Sound, Debug,
"pulse_stream_open(), PulseAudio stream buffer metrics: maxlength %u, minreq %u, prebuf %u, tlength %u, fragsize %u",
res_ba->maxlength, res_ba->minreq, res_ba->prebuf, res_ba->tlength,
res_ba->fragsize);
#endif
/* Set the data callbacks for the PulseAudio stream */
if (stream == &playback_stream)
pa_stream_set_write_callback(*stream, pulse_write_cb, mainloop);
else
pa_stream_set_read_callback(*stream, pulse_read_cb, mainloop);
ret = True;
}
while (0);
pa_threaded_mainloop_unlock(mainloop);
return ret;
}
static void
pulse_stream_close(pa_stream ** stream)
{
pa_stream_state_t state;
int err;
assert(stream != NULL);
if (*stream != NULL)
{
pa_threaded_mainloop_lock(mainloop);
state = pa_stream_get_state(*stream);
if (state == PA_STREAM_READY)
{
if (pa_stream_disconnect(*stream) != 0)
{
err = pa_context_errno(context);
logger(Sound, Error,
"pulse_stream_close(), pa_stream_disconnect: %s\n",
pa_strerror(err));
}
}
pa_stream_unref(*stream);
*stream = NULL;
pa_threaded_mainloop_unlock(mainloop);
}
}
static void
pulse_send_msg(int fd, char message)
{
int ret;
do
ret = write(fd, &message, sizeof message);
while (ret == -1 && errno == EINTR);
if (ret == -1)
logger(Sound, Error, "pulse_send_msg(), error writing message to the pipe: %s\n",
strerror(errno));
}
static RD_BOOL
pulse_playback_start(void)
{
RD_BOOL result = False;
int ret;
int err;
pa_operation *po;
if (playback_stream == NULL)
{
logger(Sound, Warning,
"pulse_playback_start(), trying to start PulseAudio stream while it's not exists");
return True;
}
pa_threaded_mainloop_lock(mainloop);
do
{
if (pa_stream_get_state(playback_stream) != PA_STREAM_READY)
{
logger(Sound, Warning,
"pulse_playback_start(), trying to start PulseAudio stream while it's not ready");
break;
}
#if PA_CHECK_VERSION(0,9,11)
ret = pa_stream_is_corked(playback_stream);
#else
ret = 1;
#endif
if (ret < 0)
{
err = pa_context_errno(context);
logger(Sound, Error, "pulse_playback_start(), pa_stream_is_corked: %s",
pa_strerror(err));
break;
}
else if (ret != 0)
{
po = pa_stream_cork(playback_stream, 0, pulse_cork_cb, mainloop);
if (po == NULL)
{
err = pa_context_errno(context);
logger(Sound, Error, "pulse_playback_start(), pa_stream_corked: %s",
pa_strerror(err));
break;
}
while (pa_operation_get_state(po) == PA_OPERATION_RUNNING)
pa_threaded_mainloop_wait(mainloop);
pa_operation_unref(po);
}
result = True;
}
while (0);
pa_threaded_mainloop_unlock(mainloop);
return result;
}
static RD_BOOL
pulse_playback_stop(void)
{
RD_BOOL result = False;
int ret;
int err;
pa_operation *po;
if (playback_stream == NULL)
{
logger(Sound, Debug,
"pulse_playback_stop(), trying to stop PulseAudio stream while it's not exists");
return True;
}
pa_threaded_mainloop_lock(mainloop);
do
{
if (pa_stream_get_state(playback_stream) != PA_STREAM_READY)
{
logger(Sound, Error,
"pulse_playback_stop(), trying to stop PulseAudio stream while it's not ready");
break;
}
#if PA_CHECK_VERSION(0,9,11)
ret = pa_stream_is_corked(playback_stream);
#else
ret = 0;
#endif
if (ret < 0)
{
err = pa_context_errno(context);
logger(Sound, Error, "pulse_playback_stop(), pa_stream_is_corked: %s",
pa_strerror(err));
break;
}
else if (ret == 0)
{
po = pa_stream_cork(playback_stream, 1, pulse_cork_cb, mainloop);
if (po == NULL)
{
err = pa_context_errno(context);
logger(Sound, Error, "pulse_playback_stop(), pa_stream_cork: %s",
pa_strerror(err));
break;
}
while (pa_operation_get_state(po) == PA_OPERATION_RUNNING)
pa_threaded_mainloop_wait(mainloop);
pa_operation_unref(po);
}
po = pa_stream_flush(playback_stream, pulse_flush_cb, mainloop);
if (po == NULL)
{
err = pa_context_errno(context);
logger(Sound, Error, "pulse_playback_stop(), pa_stream_flush: %s",
pa_strerror(err));
break;
}
while (pa_operation_get_state(po) == PA_OPERATION_RUNNING)
pa_threaded_mainloop_wait(mainloop);
pa_operation_unref(po);
result = True;
}
while (0);
pa_threaded_mainloop_unlock(mainloop);
return result;
}
static RD_BOOL
pulse_playback_set_audio(int channels, int samplerate, int samplewidth)
{
pa_stream_flags_t flags;
pulse_stream_close(&playback_stream);
flags = PA_STREAM_START_CORKED | PA_STREAM_INTERPOLATE_TIMING |
PA_STREAM_AUTO_TIMING_UPDATE;
#if PA_CHECK_VERSION(0,9,11)
flags |= PA_STREAM_ADJUST_LATENCY;
#endif
if (pulse_stream_open(&playback_stream, channels, samplerate, samplewidth, flags) != True)
return False;
return True;
}
static RD_BOOL
pulse_capture_start(void)
{
RD_BOOL result = False;
int ret;
int err;
pa_operation *po;
if (capture_stream == NULL)
{
logger(Sound, Warning,
"pulse_capture_start(), trying to start PulseAudio stream while it's not exists");
return True;
}
pa_threaded_mainloop_lock(mainloop);
do
{
if (pa_stream_get_state(capture_stream) != PA_STREAM_READY)
{
logger(Sound, Error,
"pulse_capture_start(), trying to start PulseAudio stream while it's not exists");
break;
}
#if PA_CHECK_VERSION(0,9,11)
ret = pa_stream_is_corked(capture_stream);
#else
ret = 1;
#endif
if (ret < 0)
{
err = pa_context_errno(context);
logger(Sound, Error, "pulse_capture_start(), pa_stream_is_corked: %s",
pa_strerror(err));
break;
}
else if (ret != 0)
{
po = pa_stream_cork(capture_stream, 0, pulse_cork_cb, mainloop);
if (po == NULL)
{
err = pa_context_errno(context);
logger(Sound, Error, "pulse_capture_start(), pa_stream_cork: %s\n",
pa_strerror(err));
break;
}
while (pa_operation_get_state(po) == PA_OPERATION_RUNNING)
pa_threaded_mainloop_wait(mainloop);
pa_operation_unref(po);
}
result = True;
}
while (0);
pa_threaded_mainloop_unlock(mainloop);
return result;
}
static RD_BOOL
pulse_capture_stop(void)
{
RD_BOOL result = False;
int ret;
int err;
pa_operation *po;
if (capture_stream == NULL)
{
logger(Sound, Debug,
"pulse_capture_stop(), trying to stop PulseAudio stream while it's not exists");
return True;
}
pa_threaded_mainloop_lock(mainloop);
do
{
if (pa_stream_get_state(capture_stream) != PA_STREAM_READY)
{
logger(Sound, Error,
"pulse_capture_stop(), trying to stop PulseAudio stream while it's not exists");
break;
}
#if PA_CHECK_VERSION(0,9,11)
ret = pa_stream_is_corked(capture_stream);
#else
ret = 0;
#endif
if (ret < 0)
{
err = pa_context_errno(context);
logger(Sound, Error, "pulse_capture_stop(), pa_stream_is_corked: %s\n",
pa_strerror(err));
break;
}
else if (ret == 0)
{
po = pa_stream_cork(capture_stream, 1, pulse_cork_cb, mainloop);
if (po == NULL)
{
err = pa_context_errno(context);
logger(Sound, Error, "pulse_capture_stop(), pa_stream_cork: %s\n",
pa_strerror(err));
break;
}
while (pa_operation_get_state(po) == PA_OPERATION_RUNNING)
pa_threaded_mainloop_wait(mainloop);
pa_operation_unref(po);
}
result = True;
}
while (0);
pa_threaded_mainloop_unlock(mainloop);
return result;
}
static RD_BOOL
pulse_capture_set_audio(int channels, int samplerate, int samplewidth)
{
pa_stream_flags_t flags;
pa_stream_state_t state;
int ret;
int err;
flags = PA_STREAM_START_CORKED;
#if PA_CHECK_VERSION(0,9,11)
flags |= PA_STREAM_ADJUST_LATENCY;
#endif
if (capture_stream != NULL)
{
pa_threaded_mainloop_lock(mainloop);
state = pa_stream_get_state(capture_stream);
if (state == PA_STREAM_READY)
{
#if PA_CHECK_VERSION(0,9,11)
ret = pa_stream_is_corked(capture_stream);
#else
ret = (capture_started == False);
#endif
if (ret == 0)
flags &= ~PA_STREAM_START_CORKED;
else if (ret < 0)
{
err = pa_context_errno(context);
pa_threaded_mainloop_unlock(mainloop);
logger(Sound, Error,
"pulse_capture_set_audio(), pa_stream_is_corked: %s\n",
pa_strerror(err));
return False;
}
}
pa_threaded_mainloop_unlock(mainloop);
}
pulse_stream_close(&capture_stream);
if (pulse_stream_open(&capture_stream, channels, samplerate, samplewidth, flags) != True)
return False;
return True;
}
static void
pulse_context_state_cb(pa_context * c, void *userdata)
{
pa_context_state_t state;
assert(userdata != NULL);
state = pa_context_get_state(c);
if (state == PA_CONTEXT_READY || state == PA_CONTEXT_FAILED)
pa_threaded_mainloop_signal((pa_threaded_mainloop *) userdata, 0);
}
static void
pulse_stream_state_cb(pa_stream * p, void *userdata)
{
pa_stream_state_t state;
assert(userdata != NULL);
state = pa_stream_get_state(p);
if (state == PA_STREAM_FAILED)
{
if (p == playback_stream)
{
logger(Sound, Debug,
"pulse_stream_state_cb(), PulseAudio playback stream is in a fail state");
pulse_send_msg(pulse_ctl[1], RDPSND_PULSE_OUT_ERR);
}
else
{
logger(Sound, Debug,
"pulse_stream_state_cb(), PulseAudio capture stream is in a fail state");
pulse_send_msg(pulse_ctl[1], RDPSND_PULSE_IN_ERR);
}
}
if (state == PA_STREAM_READY || state == PA_STREAM_FAILED)
pa_threaded_mainloop_signal((pa_threaded_mainloop *) userdata, 0);
}
static void
pulse_read_cb(pa_stream * p, size_t nbytes, void *userdata)
{
assert(userdata != NULL);
pulse_send_msg(pulse_ctl[1], RDPSND_PULSE_IN_AVAIL);
}
static void
pulse_write_cb(pa_stream * p, size_t nbytes, void *userdata)
{
assert(userdata != NULL);
pulse_send_msg(pulse_ctl[1], RDPSND_PULSE_OUT_AVAIL);
}
static void
pulse_cork_cb(pa_stream * p, int success, void *userdata)
{
assert(userdata != NULL);
if (!success)
{
if (p == playback_stream)
{
logger(Sound, Warning,
"pulse_cork_cb(), fail to cork/uncork the PulseAudio playback stream: %s",
pa_strerror(pa_context_errno(context)));
pulse_send_msg(pulse_ctl[1], RDPSND_PULSE_OUT_ERR);
}
else
{
logger(Sound, Warning,
"pulse_cork_cb(), fail to cork/uncork the PulseAudio capture stream: %s",
pa_strerror(pa_context_errno(context)));
pulse_send_msg(pulse_ctl[1], RDPSND_PULSE_IN_ERR);
}
}
pa_threaded_mainloop_signal((pa_threaded_mainloop *) userdata, 0);
}
static void
pulse_flush_cb(pa_stream * p, int success, void *userdata)
{
assert(userdata != NULL);
if (!success)
{
logger(Sound, Warning, "pulse_flush_cb(), Fail to flush the PulseAudio stream: %s",
pa_strerror(pa_context_errno(context)));
pulse_send_msg(pulse_ctl[1], RDPSND_PULSE_OUT_ERR);
}
pa_threaded_mainloop_signal((pa_threaded_mainloop *) userdata, 0);
}
static void
pulse_update_timing_cb(pa_stream * p, int success, void *userdata)
{
assert(userdata != NULL);
if (!success)
{
logger(Sound, Warning,
"pulse_update_timing_cb(), fail to update timing info of the PulseAudio stream: %s",
pa_strerror(pa_context_errno(context)));
pulse_send_msg(pulse_ctl[1], RDPSND_PULSE_OUT_ERR);
}
pa_threaded_mainloop_signal((pa_threaded_mainloop *) userdata, 0);
}
void
pulse_add_fds(int *n, fd_set * rfds, fd_set * wfds, struct timeval *tv)
{
if (pulse_ctl[0] != -1)
{
if (pulse_ctl[0] > *n)
*n = pulse_ctl[0];
FD_SET(pulse_ctl[0], rfds);
}
}
void
pulse_check_fds(fd_set * rfds, fd_set * wfds)
{
char audio_cmd;
int n;
if (pulse_ctl[0] == -1)
return;
if (FD_ISSET(pulse_ctl[0], rfds))
{
do
{
n = read(pulse_ctl[0], &audio_cmd, sizeof audio_cmd);
if (n == -1)
{
if (errno == EINTR)
continue;
else if (errno == EAGAIN || errno == EWOULDBLOCK)
break;
else
{
logger(Sound, Error, "pulse_check_fds(), read: %s\n",
strerror(errno));
return;
}
}
else if (n == 0)
{