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librsound.c
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/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
* Copyright (C) 2011-2017 - Daniel De Matteis
*
* RetroArch 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 Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* RetroArch 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 RetroArch.
* If not, see <http://www.gnu.org/licenses/>.
*/
/* RSound - A PCM audio client/server
* Copyright (C) 2010 - Hans-Kristian Arntzen
*
* RSound 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 Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* RSound 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 RSound.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include "drivers/rsound.h"
#if defined(__CELLOS_LV2__)
#include <cell/sysmodule.h>
#include <sys/timer.h>
#include <sys/sys_time.h>
/* Network headers */
#include <netex/net.h>
#include <netex/errno.h>
#define NETWORK_COMPAT_HEADERS 1
#elif defined(GEKKO)
#include <network.h>
#else
#define NETWORK_COMPAT_HEADERS 1
#endif
#ifdef NETWORK_COMPAT_HEADERS
#include <sys/socket.h>
#include <netdb.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include <sys/poll.h>
#endif
#include <fcntl.h>
#ifdef _WIN32
#include <direct.h>
#else
#include <unistd.h>
#endif
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <time.h>
#include <errno.h>
#include <compat/strl.h>
#include <retro_inline.h>
#include <retro_assert.h>
#include <retro_miscellaneous.h>
#include <retro_timers.h>
/*
****************************************************************************
Naming convention. Functions for use in API are called rsd_*(), *
internal function are called rsnd_*() *
****************************************************************************
*/
// Internal enumerations
enum rsd_logtype
{
RSD_LOG_DEBUG = 0,
RSD_LOG_WARN,
RSD_LOG_ERR
};
enum rsd_conn_type
{
RSD_CONN_TCP = 0x0000,
RSD_CONN_UNIX = 0x0001,
RSD_CONN_DECNET = 0x0002,
RSD_CONN_PROTO = 0x100
};
// Some logging macros.
#define RSD_WARN(fmt, args...)
#define RSD_ERR(fmt, args...)
#define RSD_DEBUG(fmt, args...)
#if defined(__CELLOS_LV2__)
static int init_count = 0;
#define pollfd_fd(x) x.fd
#define net_send(a,b,c,d) send(a,b,c,d)
#define net_socket(a,b,c) socket(a,b,c)
#define net_connect(a,b,c) connect(a,b,c)
#define net_shutdown(a,b) shutdown(a,b)
#define net_socketclose(x) socketclose(x)
#define net_recv(a,b,c,d) recv(a,b,c,d)
#elif defined(GEKKO)
#define SHUT_RD 0
#define socketpoll(x, y, z) net_poll(x, y, z)
#define pollfd pollsd
#define pollfd_fd(x) x.socket
#define gethostbyname net_gethostbyname
#define getsockopt net_getsockopt
#define setsockopt net_setsockopt
#define net_send(a,b,c,d) net_send(a,b,c,d)
#define net_socket(a,b,c) net_socket(a,b,c)
#define net_connect(a,b,c) net_connect(a,b,c)
#define net_shutdown(a,b) net_shutdown(a,b)
#define net_socketclose(x) net_close(x)
#define net_recv(a,b,c,d) net_recv(a,b,c,d)
#else
#define pollfd_fd(x) x.fd
#define net_socket(a,b,c) socket(a,b,c)
#define socketpoll(x, y, z) poll(x, y, z)
#define net_send(a,b,c,d) send(a,b,c,d)
#define net_connect(a,b,c) connect(a,b,c)
#define net_shutdown(a,b) shutdown(a,b)
#define net_socketclose(x) close(x)
#define net_recv(a,b,c,d) recv(a,b,c,d)
#endif
static ssize_t rsnd_send_chunk(int socket, const void *buf, size_t size, int blocking);
static ssize_t rsnd_recv_chunk(int socket, void *buf, size_t size, int blocking);
static int rsnd_start_thread(rsound_t *rd);
static int rsnd_stop_thread(rsound_t *rd);
static size_t rsnd_get_delay(rsound_t *rd);
static size_t rsnd_get_ptr(rsound_t *rd);
static int rsnd_reset(rsound_t *rd);
// Protocol functions
static int rsnd_send_identity_info(rsound_t *rd);
static int rsnd_close_ctl(rsound_t *rd);
static int rsnd_send_info_query(rsound_t *rd);
static int rsnd_update_server_info(rsound_t *rd);
static int rsnd_poll(struct pollfd *fd, int numfd, int timeout);
static void rsnd_cb_thread(void *thread_data);
static void rsnd_thread(void *thread_data);
/* Determine whether we're running big- or little endian */
static INLINE int rsnd_is_little_endian(void)
{
uint16_t i = 1;
return *((uint8_t*)&i);
}
/* Simple functions for swapping bytes */
static INLINE void rsnd_swap_endian_16 ( uint16_t * x )
{
*x = (*x>>8) | (*x<<8);
}
static INLINE void rsnd_swap_endian_32 ( uint32_t * x )
{
*x = (*x >> 24 ) |
((*x<<8) & 0x00FF0000) |
((*x>>8) & 0x0000FF00) |
(*x << 24);
}
static INLINE int rsnd_format_to_samplesize ( uint16_t fmt )
{
switch(fmt)
{
case RSD_S32_LE:
case RSD_S32_BE:
case RSD_S32_NE:
case RSD_U32_LE:
case RSD_U32_BE:
case RSD_U32_NE:
return 4;
case RSD_S16_LE:
case RSD_U16_LE:
case RSD_S16_BE:
case RSD_U16_BE:
case RSD_S16_NE:
case RSD_U16_NE:
return 2;
case RSD_U8:
case RSD_S8:
case RSD_ALAW:
case RSD_MULAW:
return 1;
default:
return -1;
}
}
int rsd_samplesize( rsound_t *rd )
{
retro_assert(rd != NULL);
return rd->samplesize;
}
/* Creates sockets and attempts to connect to the server. Returns -1 when failed, and 0 when success. */
static int rsnd_connect_server( rsound_t *rd )
{
struct sockaddr_in addr;
struct pollfd fd;
int i = 1;
(void)i;
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_port = htons(atoi(rd->port));
if (!isdigit(rd->host[0]))
{
struct hostent *host = gethostbyname(rd->host);
if (host == NULL)
return -1;
addr.sin_addr.s_addr = inet_addr(host->h_addr_list[0]);
}
else
addr.sin_addr.s_addr = inet_addr(rd->host);
rd->conn_type = RSD_CONN_TCP;
rd->conn.socket = net_socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if ( rd->conn.socket < 0 )
goto error;
rd->conn.ctl_socket = net_socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if ( rd->conn.ctl_socket < 0 )
goto error;
/* Uses non-blocking IO since it performed more deterministic with poll()/send() */
#ifdef __CELLOS_LV2__
setsockopt(rd->conn.socket, SOL_SOCKET, SO_NBIO, &i, sizeof(int));
setsockopt(rd->conn.ctl_socket, SOL_SOCKET, SO_NBIO, &i, sizeof(int));
#else
fcntl(rd->conn.socket, F_SETFL, O_NONBLOCK);
fcntl(rd->conn.ctl_socket, F_SETFL, O_NONBLOCK);
#endif
/* Nonblocking connect with 3 second timeout */
net_connect(rd->conn.socket, (struct sockaddr*)&addr, sizeof(addr));
pollfd_fd(fd) = rd->conn.socket;
fd.events = POLLOUT;
rsnd_poll(&fd, 1, 3000);
if (!(fd.revents & POLLOUT))
goto error;
net_connect(rd->conn.ctl_socket, (struct sockaddr*)&addr, sizeof(addr));
pollfd_fd(fd) = rd->conn.ctl_socket;
rsnd_poll(&fd, 1, 3000);
if (!(fd.revents & POLLOUT))
goto error;
return 0;
/* Cleanup for errors. */
error:
RSD_ERR("[RSound] Connecting to server failed. \"%s\"", rd->host);
return -1;
}
/* Conjures a WAV-header and sends this to server. Returns -1 when failed, and 0 when success. */
static int rsnd_send_header_info(rsound_t *rd)
{
/* Defines the size of a wave header */
#define HEADER_SIZE 44
char *header = calloc(1, HEADER_SIZE);
if (header == NULL)
{
RSD_ERR("[RSound] Could not allocate memory.");
return -1;
}
uint16_t temp16;
uint32_t temp32;
/* These magic numbers represent the position of the elements in the wave header.
We can't simply send a wave struct over the network since the compiler is allowed to
pad our structs as they like, so sizeof(waveheader) might not be similar on two different
systems. */
#define RATE 24
#define CHANNEL 22
#define FRAMESIZE 34
#define FORMAT 42
uint32_t temp_rate = rd->rate;
uint16_t temp_channels = rd->channels;
uint16_t temp_bits = 8 * rsnd_format_to_samplesize(rd->format);
uint16_t temp_format = rd->format;
// Checks the format for native endian which will need to be set properly.
switch ( temp_format )
{
case RSD_S16_NE:
if ( rsnd_is_little_endian() )
temp_format = RSD_S16_LE;
else
temp_format = RSD_S16_BE;
break;
case RSD_U16_NE:
if ( rsnd_is_little_endian() )
temp_format = RSD_U16_LE;
else
temp_format = RSD_U16_BE;
break;
case RSD_S32_NE:
if ( rsnd_is_little_endian() )
temp_format = RSD_S32_LE;
else
temp_format = RSD_S32_BE;
break;
case RSD_U32_NE:
if ( rsnd_is_little_endian() )
temp_format = RSD_U32_LE;
else
temp_format = RSD_U32_BE;
break;
default:
break;
}
/* Since the values in the wave header we are interested in, are little endian (>_<), we need
to determine whether we're running it or not, so we can byte swap accordingly.
Could determine this compile time, but it was simpler to do it this way. */
// Fancy macros for embedding little endian values into the header.
#define SET32(buf,offset,x) (*((uint32_t*)(buf+offset)) = x)
#define SET16(buf,offset,x) (*((uint16_t*)(buf+offset)) = x)
#define LSB16(x) if ( !rsnd_is_little_endian() ) { rsnd_swap_endian_16(&(x)); }
#define LSB32(x) if ( !rsnd_is_little_endian() ) { rsnd_swap_endian_32(&(x)); }
/* Here we embed in the rest of the WAV header for it to be somewhat valid */
strlcpy(header, "RIFF", sizeof(header));
SET32(header, 4, 0);
strlcpy(header+8, "WAVE", sizeof(header));
strlcpy(header+12, "fmt ", sizeof(header));
temp32 = 16;
LSB32(temp32);
SET32(header, 16, temp32);
temp16 = 0; // PCM data
switch( rd->format )
{
case RSD_S16_LE:
case RSD_U8:
temp16 = 1;
break;
case RSD_ALAW:
temp16 = 6;
break;
case RSD_MULAW:
temp16 = 7;
break;
}
LSB16(temp16);
SET16(header, 20, temp16);
// Channels here
LSB16(temp_channels);
SET16(header, CHANNEL, temp_channels);
// Samples per sec
LSB32(temp_rate);
SET32(header, RATE, temp_rate);
temp32 = rd->rate * rd->channels * rsnd_format_to_samplesize(rd->format);
LSB32(temp32);
SET32(header, 28, temp32);
temp16 = rd->channels * rsnd_format_to_samplesize(rd->format);
LSB16(temp16);
SET16(header, 32, temp16);
// Bits per sample
LSB16(temp_bits);
SET16(header, FRAMESIZE, temp_bits);
strlcpy(header+36, "data", sizeof(header));
/* Do not care about cksize here (impossible to know beforehand).
* It is used by the server for format. */
LSB16(temp_format);
SET16(header, FORMAT, temp_format);
/* End static header */
if ( rsnd_send_chunk(rd->conn.socket, header, HEADER_SIZE, 1) != HEADER_SIZE )
{
free(header);
return -1;
}
free(header);
return 0;
}
/* Recieves backend info from server that is of interest to the client. (This mini-protocol might be extended later on.) */
static int rsnd_get_backend_info ( rsound_t *rd )
{
#define RSND_HEADER_SIZE 8
#define LATENCY 0
#define CHUNKSIZE 1
// Header is 2 uint32_t's. = 8 bytes.
uint32_t rsnd_header[2] = {0};
if ( rsnd_recv_chunk(rd->conn.socket, rsnd_header, RSND_HEADER_SIZE, 1) != RSND_HEADER_SIZE )
{
RSD_ERR("[RSound] Couldn't receive chunk.\n");
return -1;
}
/* Again, we can't be 100% certain that sizeof(backend_info_t) is equal on every system */
if ( rsnd_is_little_endian() )
{
rsnd_swap_endian_32(&rsnd_header[LATENCY]);
rsnd_swap_endian_32(&rsnd_header[CHUNKSIZE]);
}
rd->backend_info.latency = rsnd_header[LATENCY];
rd->backend_info.chunk_size = rsnd_header[CHUNKSIZE];
#define MAX_CHUNK_SIZE 1024 // We do not want larger chunk sizes than this.
if ( rd->backend_info.chunk_size > MAX_CHUNK_SIZE || rd->backend_info.chunk_size <= 0 )
rd->backend_info.chunk_size = MAX_CHUNK_SIZE;
/* Assumes a default buffer size should it cause problems of being too small */
if ( rd->buffer_size == 0 || rd->buffer_size < rd->backend_info.chunk_size * 2 )
rd->buffer_size = rd->backend_info.chunk_size * 32;
if ( rd->fifo_buffer != NULL )
fifo_free(rd->fifo_buffer);
rd->fifo_buffer = fifo_new (rd->buffer_size);
if ( rd->fifo_buffer == NULL )
{
RSD_ERR("[RSound] Failed to create FIFO buffer.\n");
return -1;
}
// Only bother with setting network buffer size if we're doing TCP.
if ( rd->conn_type & RSD_CONN_TCP )
{
#define MAX_TCP_BUFSIZE (1 << 14)
int bufsiz = rd->buffer_size;
if (bufsiz > MAX_TCP_BUFSIZE)
bufsiz = MAX_TCP_BUFSIZE;
setsockopt(rd->conn.socket, SOL_SOCKET, SO_SNDBUF, &bufsiz, sizeof(int));
bufsiz = rd->buffer_size;
setsockopt(rd->conn.ctl_socket, SOL_SOCKET, SO_SNDBUF, &bufsiz, sizeof(int));
bufsiz = rd->buffer_size;
setsockopt(rd->conn.ctl_socket, SOL_SOCKET, SO_RCVBUF, &bufsiz, sizeof(int));
int flag = 1;
setsockopt(rd->conn.socket, IPPROTO_TCP, TCP_NODELAY, &flag, sizeof(int));
flag = 1;
setsockopt(rd->conn.ctl_socket, IPPROTO_TCP, TCP_NODELAY, &flag, sizeof(int));
}
// Can we read the last 8 bytes so we can use the protocol interface?
// This is non-blocking.
if ( rsnd_recv_chunk(rd->conn.socket, rsnd_header, RSND_HEADER_SIZE, 0) == RSND_HEADER_SIZE )
rd->conn_type |= RSD_CONN_PROTO;
else
{ RSD_DEBUG("[RSound] Failed to get new proto.\n"); }
// We no longer want to read from this socket.
#ifdef _WIN32
net_shutdown(rd->conn.socket, SD_RECEIVE);
#elif !defined(__APPLE__) // OSX doesn't seem to like shutdown()
net_shutdown(rd->conn.socket, SHUT_RD);
#endif
return 0;
}
/* Makes sure that we're connected and done with wave header handshaking. Returns -1 on error, and 0 on success.
This goes for all other functions in use. */
static int rsnd_create_connection(rsound_t *rd)
{
int rc;
/* Are we connected to the server? If not, these values have been set to <0, so we make sure that we connect */
if ( rd->conn.socket <= 0 && rd->conn.ctl_socket <= 0 )
{
rc = rsnd_connect_server(rd);
if (rc < 0)
{
RSD_ERR("[RSound] connect server failed.\n");
rsd_stop(rd);
return -1;
}
/* After connecting, makes really sure that we have a working connection. */
struct pollfd fd;
pollfd_fd(fd) = rd->conn.socket;
fd.events = POLLOUT;
if ( rsnd_poll(&fd, 1, 2000) < 0 )
{
RSD_ERR("[RSound] rsnd_poll failed.\n");
rsd_stop(rd);
return -1;
}
if ( !(fd.revents & POLLOUT) )
{
RSD_ERR("[RSound] Poll didn't return what we wanted.\n");
rsd_stop(rd);
return -1;
}
}
/* Is the server ready for data? The first thing it expects is the wave header */
if ( !rd->ready_for_data )
{
/* Part of the uber simple protocol.
1. Send wave header.
2. Recieve backend info like latency and preferred packet size.
3. Starts the playback thread. */
rc = rsnd_send_header_info(rd);
if (rc < 0)
{
RSD_ERR("[RSound] Send header failed.\n");
rsd_stop(rd);
return -1;
}
rc = rsnd_get_backend_info(rd);
if (rc < 0)
{
RSD_ERR("[RSound] Get backend info failed.\n");
rsd_stop(rd);
return -1;
}
rc = rsnd_start_thread(rd);
if (rc < 0)
{
RSD_ERR("[RSound] Starting thread failed.\n");
rsd_stop(rd);
return -1;
}
if ( (rd->conn_type & RSD_CONN_PROTO) && strlen(rd->identity) > 0 )
{
rsnd_send_identity_info(rd);
}
rd->ready_for_data = 1;
}
return 0;
}
/* Sends a chunk over the network. Makes sure that everything is sent if blocking. Returns -1 if connection is lost, non-negative if success.
* If blocking, and not enough data is recieved, it will return -1. */
static ssize_t rsnd_send_chunk(int socket, const void* buf, size_t size, int blocking)
{
ssize_t rc = 0;
size_t wrote = 0;
ssize_t send_size = 0;
struct pollfd fd;
pollfd_fd(fd) = socket;
fd.events = POLLOUT;
int sleep_time = (blocking) ? 10000 : 0;
#define MAX_PACKET_SIZE 1024
while ( wrote < size )
{
if ( rsnd_poll(&fd, 1, sleep_time) < 0 )
return -1;
if ( fd.revents & POLLHUP )
{
RSD_WARN("*** Remote side hung up! ***");
return -1;
}
if ( fd.revents & POLLOUT )
{
/* We try to limit ourselves to 1KiB packet sizes. */
send_size = (size - wrote) > MAX_PACKET_SIZE ? MAX_PACKET_SIZE : size - wrote;
rc = net_send(socket, (const char*)buf + wrote, send_size, 0);
if ( rc < 0 )
{
RSD_ERR("[RSound] Error sending chunk, %s.\n", strerror(errno));
return rc;
}
wrote += rc;
}
else
{
/* If server hasn't stopped blocking after 10 secs, then we should probably shut down the stream. */
if ( blocking )
return -1;
else
return wrote;
}
}
return (ssize_t)wrote;
}
/* Recieved chunk. Makes sure that everything is recieved if blocking. Returns -1 if connection is lost, non-negative if success.
* If blocking, and not enough data is recieved, it will return -1. */
static ssize_t rsnd_recv_chunk(int socket, void *buf, size_t size, int blocking)
{
ssize_t rc = 0;
size_t has_read = 0;
ssize_t read_size = 0;
struct pollfd fd;
pollfd_fd(fd) = socket;
fd.events = POLLIN;
int sleep_time = (blocking) ? 5000 : 0;
while ( has_read < size )
{
if ( rsnd_poll(&fd, 1, sleep_time) < 0 )
{
RSD_ERR("[RSound] Poll failed.\n");
return -1;
}
if ( fd.revents & POLLHUP )
{
RSD_ERR("[RSound] Server hung up.\n");
return -1;
}
if ( fd.revents & POLLIN )
{
read_size = (size - has_read) > MAX_PACKET_SIZE ? MAX_PACKET_SIZE : size - has_read;
rc = net_recv(socket, (char*)buf + has_read, read_size, 0);
if ( rc <= 0 )
{
RSD_ERR("[RSound] Error receiving chunk, %s.\n", strerror(errno));
return rc;
}
has_read += rc;
}
else
{
if ( blocking )
{
RSD_ERR("[RSound] Block fail.\n");
return -1;
}
else
return has_read;
}
}
return (ssize_t)has_read;
}
static int rsnd_poll(struct pollfd *fd, int numfd, int timeout)
{
for(;;)
{
if ( socketpoll(fd, numfd, timeout) < 0 )
{
if ( errno == EINTR )
continue;
perror("poll");
return -1;
}
return 0;
}
}
static int64_t rsnd_get_time_usec(void)
{
#if defined(_WIN32)
static LARGE_INTEGER freq;
if (!freq.QuadPart && !QueryPerformanceFrequency(&freq)) // Frequency is guaranteed to not change.
return 0;
LARGE_INTEGER count;
if (!QueryPerformanceCounter(&count))
return 0;
return count.QuadPart * 1000000 / freq.QuadPart;
#elif defined(__CELLOS_LV2__)
return sys_time_get_system_time();
#elif defined(GEKKO)
return ticks_to_microsecs(gettime());
#elif defined(__MACH__) // OSX doesn't have clock_gettime ...
clock_serv_t cclock;
mach_timespec_t mts;
host_get_clock_service(mach_host_self(), CALENDAR_CLOCK, &cclock);
clock_get_time(cclock, &mts);
mach_port_deallocate(mach_task_self(), cclock);
return mts.tv_sec * INT64_C(1000000) + (mts.tv_nsec + 500) / 1000;
#elif defined(_POSIX_MONOTONIC_CLOCK) || defined(__QNX__) || defined(ANDROID)
struct timespec tv;
if (clock_gettime(CLOCK_MONOTONIC, &tv) < 0)
return 0;
return tv.tv_sec * INT64_C(1000000) + (tv.tv_nsec + 500) / 1000;
#elif defined(EMSCRIPTEN)
return emscripten_get_now() * 1000;
#else
#error "Your platform does not have a timer function implemented in rsnd_get_time_usec(). Cannot continue."
#endif
}
/* Calculates how many bytes there are in total in the virtual buffer. This is calculated client side.
It should be accurate enough unless we have big problems with buffer underruns.
This function is called by rsd_delay() to determine the latency.
This function might be changed in the future to correctly determine latency from server. */
static void rsnd_drain(rsound_t *rd)
{
/* If the audio playback has started on the server we need to use timers. */
if ( rd->has_written )
{
/* Calculates the amount of bytes that the server has consumed. */
int64_t time = rsnd_get_time_usec();
int64_t delta = time - rd->start_time;
delta *= rd->rate * rd->channels * rd->samplesize;
delta /= 1000000;
/* Calculates the amount of data we have in our virtual buffer. Only used to calculate delay. */
slock_lock(rd->thread.mutex);
rd->bytes_in_buffer = (int)((int64_t)rd->total_written + (int64_t)fifo_read_avail(rd->fifo_buffer) - delta);
slock_unlock(rd->thread.mutex);
}
else
{
slock_lock(rd->thread.mutex);
rd->bytes_in_buffer = fifo_read_avail(rd->fifo_buffer);
slock_unlock(rd->thread.mutex);
}
}
/* Tries to fill the buffer. Uses signals to determine when the buffer is ready to be filled. Should the thread not be active
it will treat this as an error. Crude implementation of a blocking FIFO. */
static size_t rsnd_fill_buffer(rsound_t *rd, const char *buf, size_t size)
{
/* Wait until we have a ready buffer */
for (;;)
{
/* Should the thread be shut down while we're running, return with error */
if ( !rd->thread_active )
return 0;
slock_lock(rd->thread.mutex);
if ( fifo_write_avail(rd->fifo_buffer) >= size )
{
slock_unlock(rd->thread.mutex);
break;
}
slock_unlock(rd->thread.mutex);
/* Sleeps until we can write to the FIFO. */
slock_lock(rd->thread.cond_mutex);
scond_signal(rd->thread.cond);
RSD_DEBUG("[RSound] rsnd_fill_buffer: Going to sleep.\n");
scond_wait(rd->thread.cond, rd->thread.cond_mutex);
RSD_DEBUG("[RSound] rsnd_fill_buffer: Woke up.\n");
slock_unlock(rd->thread.cond_mutex);
}
slock_lock(rd->thread.mutex);
fifo_write(rd->fifo_buffer, buf, size);
slock_unlock(rd->thread.mutex);
//RSD_DEBUG("[RSound] fill_buffer: Wrote to buffer.\n");
/* Send signal to thread that buffer has been updated */
//RSD_DEBUG("[RSound] fill_buffer: Waking up thread.\n");
scond_signal(rd->thread.cond);
return size;
}
static int rsnd_start_thread(rsound_t *rd)
{
if ( !rd->thread_active )
{
rd->thread_active = 1;
rd->thread.thread = (sthread_t*)sthread_create(rd->audio_callback ? rsnd_cb_thread : rsnd_thread, rd);
if ( !rd->thread.thread )
{
rd->thread_active = 0;
RSD_ERR("[RSound] Failed to create thread.");
return -1;
}
return 0;
}
else
return 0;
}
/* Makes sure that the playback thread has been correctly shut down */
static int rsnd_stop_thread(rsound_t *rd)
{
if ( rd->thread_active )
{
RSD_DEBUG("[RSound] Shutting down thread.\n");
slock_lock(rd->thread.cond_mutex);
rd->thread_active = 0;
scond_signal(rd->thread.cond);
slock_unlock(rd->thread.cond_mutex);
sthread_join(rd->thread.thread);
RSD_DEBUG("[RSound] Thread joined successfully.\n");
return 0;
}
else
{
RSD_DEBUG("Thread is already shut down.\n");
return 0;
}
}
/* Calculates audio delay in bytes */
static size_t rsnd_get_delay(rsound_t *rd)
{
int ptr;
rsnd_drain(rd);
ptr = rd->bytes_in_buffer;
/* Adds the backend latency to the calculated latency. */
ptr += (int)rd->backend_info.latency;
slock_lock(rd->thread.mutex);
ptr += rd->delay_offset;
RSD_DEBUG("Offset: %d.\n", rd->delay_offset);
slock_unlock(rd->thread.mutex);
if ( ptr < 0 )
ptr = 0;
return (size_t)ptr;
}
static size_t rsnd_get_ptr(rsound_t *rd)
{
int ptr;
slock_lock(rd->thread.mutex);
ptr = fifo_read_avail(rd->fifo_buffer);
slock_unlock(rd->thread.mutex);
return ptr;
}
static int rsnd_send_identity_info(rsound_t *rd)
{
#define RSD_PROTO_MAXSIZE 256
#define RSD_PROTO_CHUNKSIZE 8
char tmpbuf[RSD_PROTO_MAXSIZE];
char sendbuf[RSD_PROTO_MAXSIZE];
snprintf(tmpbuf, RSD_PROTO_MAXSIZE - 1, " IDENTITY %s", rd->identity);
tmpbuf[RSD_PROTO_MAXSIZE - 1] = '\0';
snprintf(sendbuf, RSD_PROTO_MAXSIZE - 1, "RSD%5d%s", (int)strlen(tmpbuf), tmpbuf);
sendbuf[RSD_PROTO_MAXSIZE - 1] = '\0';
if ( rsnd_send_chunk(rd->conn.ctl_socket, sendbuf, strlen(sendbuf), 0) != (ssize_t)strlen(sendbuf) )
return -1;
return 0;
}
static int rsnd_close_ctl(rsound_t *rd)
{
if ( !(rd->conn_type & RSD_CONN_PROTO) )
return -1;
struct pollfd fd;
pollfd_fd(fd) = rd->conn.ctl_socket;
fd.events = POLLOUT;
if ( rsnd_poll(&fd, 1, 0) < 0 )
return -1;
if ( fd.revents & POLLOUT )
{
const char *sendbuf = "RSD 9 CLOSECTL";
if (net_send(rd->conn.ctl_socket, sendbuf, strlen(sendbuf), 0) < 0 )
return -1;
}
else if ( fd.revents & POLLHUP )
return 0;
// Let's wait for reply (or POLLHUP)
fd.events = POLLIN;
int index = 0;
char buf[RSD_PROTO_MAXSIZE*2] = {0};
for(;;)
{
if ( rsnd_poll(&fd, 1, 2000) < 0 )
return -1;
if ( fd.revents & POLLHUP )
break;
else if ( fd.revents & POLLIN )
{
const char *subchar;
// We just read everything in large chunks until we find what we're looking for
int rc = net_recv(rd->conn.ctl_socket, buf + index, RSD_PROTO_MAXSIZE*2 - 1 - index, 0);
if (rc <= 0 )
return -1;
// Can we find it directly?
if ( strstr(buf, "RSD 12 CLOSECTL OK") != NULL )
break;
else if ( strstr(buf, "RSD 15 CLOSECTL ERROR") != NULL )
return -1;
subchar = strrchr(buf, 'R');
if ( subchar == NULL )
index = 0;
else
{
memmove(buf, subchar, strlen(subchar) + 1);
index = strlen(buf);
}
}
else
return -1;
}
net_socketclose(rd->conn.ctl_socket);
return 0;
}
// Sends delay info request to server on the ctl socket. This code section isn't critical, and will work if it works.
// It will never block.
static int rsnd_send_info_query(rsound_t *rd)
{
char tmpbuf[RSD_PROTO_MAXSIZE];
char sendbuf[RSD_PROTO_MAXSIZE];
snprintf(tmpbuf, RSD_PROTO_MAXSIZE - 1, " INFO %lld", (long long int)rd->total_written);
tmpbuf[RSD_PROTO_MAXSIZE - 1] = '\0';
snprintf(sendbuf, RSD_PROTO_MAXSIZE - 1, "RSD%5d%s", (int)strlen(tmpbuf), tmpbuf);
sendbuf[RSD_PROTO_MAXSIZE - 1] = '\0';
if ( rsnd_send_chunk(rd->conn.ctl_socket, sendbuf, strlen(sendbuf), 0) != (ssize_t)strlen(sendbuf) )
return -1;
return 0;
}