Initial PulseAudio code.

Makefile

@@ -42,6 +42,11 @@ ifeq ($(HAVE_JACK),1)
    OBJ += audio/jack.o
    LIBS += -ljack
 endif
+ifeq ($(HAVE_PULSE), 1)
+   OBJ += audio/pulse.o
+   LIBS += $(PULSE_LIBS)
+   DEFINES += $(PULSE_CFLAGS)
+endif
 
 ifeq ($(HAVE_SDL), 1)
    OBJ += gfx/gl.o input/sdl.o audio/sdl.o audio/buffer.o

README.md

@@ -26,7 +26,7 @@ SSNES can utilize these libraries if enabled:
    - libxml2 (bSNES XML shaders)
    - libfreetype2 (TTF font rendering on screen)
 
-SSNES needs one of these audio driver libraries:
+SSNES needs at least one of these audio driver libraries:
 
    - ALSA
    - OSS
@@ -35,6 +35,8 @@ SSNES needs one of these audio driver libraries:
    - OpenAL
    - JACK
    - SDL
+   - XAudio2 (Win32)
+   - PulseAudio
 
 # Building libsnes
 

audio/pulse.c

@@ -0,0 +1,191 @@
+/*  SSNES - A Super Nintendo Entertainment System (SNES) Emulator frontend for libsnes.
+ *  Copyright (C) 2010-2011 - Hans-Kristian Arntzen
+ *
+ *  Some code herein may be based on code found in BSNES.
+ * 
+ *  SSNES 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.
+ *
+ *  SSNES 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 SSNES.
+ *  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#include "driver.h"
+#include "general.h"
+#include <pulse/pulseaudio.h>
+#include <stdbool.h>
+#include <string.h>
+
+#include <stdio.h>
+
+typedef struct
+{
+   pa_mainloop *mainloop;
+   pa_context *context;
+   pa_stream *stream;
+   bool nonblock;
+} pa_t;
+
+static void __pulse_free(void *data)
+{
+   pa_t *pa = data;
+   if (pa)
+   {
+      if (pa->stream)
+      {
+         pa_stream_disconnect(pa->stream);
+         pa_stream_unref(pa->stream);
+      }
+
+      if (pa->context)
+      {
+         pa_context_disconnect(pa->context);
+         pa_context_unref(pa->context);
+      }
+
+      if (pa->mainloop)
+         pa_mainloop_free(pa->mainloop);
+
+      free(pa);
+   }
+}
+
+static inline uint8_t is_little_endian(void)
+{
+   union
+   {
+      uint16_t x;
+      uint8_t y[2];
+   } u;
+
+   u.x = 1;
+   return u.y[0];
+}
+
+static void* __pulse_init(const char* device, int rate, int latency)
+{
+   pa_t *pa = calloc(1, sizeof(*pa));
+   if (!pa)
+      goto error;
+
+   pa->mainloop = pa_mainloop_new();
+   if (!pa->mainloop)
+      goto error;
+
+   pa->context = pa_context_new(pa_mainloop_get_api(pa->mainloop), "SSNES");
+   if (!pa->context)
+      goto error;
+   if (pa_context_connect(pa->context, device, PA_CONTEXT_NOFLAGS, NULL) < 0)
+      goto error;
+
+   pa_context_state_t cstate;
+   do
+   {
+      pa_mainloop_iterate(pa->mainloop, 1, NULL);
+      cstate = pa_context_get_state(pa->context);
+      if (!PA_CONTEXT_IS_GOOD(cstate)) goto error;
+   } while (cstate != PA_CONTEXT_READY);
+
+   pa_sample_spec spec = {
+      .format = is_little_endian() ? PA_SAMPLE_FLOAT32LE : PA_SAMPLE_FLOAT32BE,
+      .channels = 2,
+      .rate = rate
+   };
+
+   pa->stream = pa_stream_new(pa->context, "audio", &spec, NULL);
+   if (!pa->stream)
+      goto error;
+
+   pa_buffer_attr buffer_attr = {
+      .maxlength = -1,
+      .tlength = pa_usec_to_bytes(latency * PA_USEC_PER_MSEC, &spec),
+      .prebuf = -1,
+      .minreq = -1,
+      .fragsize = -1
+   };
+
+   if (pa_stream_connect_playback(pa->stream, NULL, &buffer_attr, PA_STREAM_ADJUST_LATENCY, NULL, NULL) < 0)
+      goto error;
+
+   pa_stream_state_t sstate;
+   do 
+   {
+      pa_mainloop_iterate(pa->mainloop, 1, NULL);
+      sstate = pa_stream_get_state(pa->stream);
+      if(!PA_STREAM_IS_GOOD(sstate)) goto error;
+   } while(sstate != PA_STREAM_READY);
+
+   return pa;
+
+error:
+   __pulse_free(pa); 
+   return NULL;
+}
+
+static ssize_t __pulse_write(void* data, const void* buf, size_t size)
+{
+   pa_t *pa = data;
+
+   unsigned length = pa_stream_writable_size(pa->stream);
+   while (length < size)
+   {
+      pa_mainloop_iterate(pa->mainloop, 1, NULL);
+
+      length = pa_stream_writable_size(pa->stream);
+
+      if (pa->nonblock)
+         break;
+   }
+
+   size_t write_size = length < size ? length : size;
+
+   pa_stream_write(pa->stream, buf, write_size, NULL, 0LL, PA_SEEK_RELATIVE);
+   return write_size;
+}
+
+static bool __pulse_stop(void *data)
+{
+   (void)data;
+   return true;
+}
+
+static bool __pulse_start(void *data)
+{
+   (void)data;
+   return true;
+}
+
+static void __pulse_set_nonblock_state(void *data, bool state)
+{
+   pa_t *pa = data;
+   pa->nonblock = state;
+}
+
+static bool __pulse_use_float(void *data)
+{
+   (void)data;
+   return true;
+}
+
+const audio_driver_t audio_pulse = {
+   .init = __pulse_init,
+   .write = __pulse_write,
+   .stop = __pulse_stop,
+   .start = __pulse_start,
+   .set_nonblock_state = __pulse_set_nonblock_state,
+   .use_float = __pulse_use_float,
+   .free = __pulse_free,
+   .ident = "pulse"
+};
+
+   
+
+
+   
+   

config.def.h

@@ -54,6 +54,7 @@
 #define AUDIO_JACK 6
 #define AUDIO_SDL 8
 #define AUDIO_XAUDIO 9
+#define AUDIO_PULSE 10
 ////////////////////////
 #define INPUT_SDL 7
 ////////////////////////
@@ -62,6 +63,8 @@
 
 #if defined(HAVE_ALSA)
 #define AUDIO_DEFAULT_DRIVER AUDIO_ALSA
+#elif defined(HAVE_PULSE)
+#define AUDIO_DEFAULT_DRIVER AUDIO_PULSE
 #elif defined(HAVE_OSS)
 #define AUDIO_DEFAULT_DRIVER AUDIO_OSS
 #elif defined(HAVE_JACK)

driver.c

@@ -52,6 +52,9 @@ static const audio_driver_t *audio_drivers[] = {
 #ifdef HAVE_XAUDIO
    &audio_xa,
 #endif
+#ifdef HAVE_PULSE
+   &audio_pulse,
+#endif
 };
 
 static const video_driver_t *video_drivers[] = {

driver.h

@@ -139,6 +139,7 @@ extern const audio_driver_t audio_openal;
 extern const audio_driver_t audio_jack;
 extern const audio_driver_t audio_sdl;
 extern const audio_driver_t audio_xa;
+extern const audio_driver_t audio_pulse;
 extern const video_driver_t video_gl;
 extern const input_driver_t input_sdl;
 ////////////////////////////////////////////////

qb/config.libs.sh

@@ -21,6 +21,7 @@ check_lib AL -lopenal alcOpenDevice
 check_lib RSOUND -lrsound rsd_init
 check_lib ROAR -lroar roar_vs_new
 check_lib JACK -ljack jack_client_open
+check_pkgconf PULSE libpulse
 
 check_pkgconf SDL sdl 1.2.10
 check_critical SDL "Cannot find SDL library."
@@ -46,7 +47,7 @@ check_lib DYNAMIC -ldl dlopen
 check_pkgconf FREETYPE freetype2
 
 # Creates config.mk and config.h.
-VARS="ALSA OSS AL RSOUND ROAR JACK SDL FILTER CG XML DYNAMIC FFMPEG AVCODEC AVFORMAT AVCORE AVUTIL SWSCALE SRC CONFIGFILE FREETYPE"
+VARS="ALSA OSS AL RSOUND ROAR JACK PULSE SDL FILTER CG XML DYNAMIC FFMPEG AVCODEC AVFORMAT AVCORE AVUTIL SWSCALE SRC CONFIGFILE FREETYPE"
 create_config_make config.mk $VARS
 create_config_header config.h $VARS
 

qb/config.params.sh

@@ -20,4 +20,5 @@ add_command_line_enable RSOUND "Enable RSound support" auto
 add_command_line_enable ROAR "Enable RoarAudio support" auto
 add_command_line_enable AL "Enable OpenAL support" auto
 add_command_line_enable JACK "Enable JACK support" auto
+add_command_line_enable PULSE "Enable PulseAudio support" auto
 add_command_line_enable FREETYPE "Enable FreeType support" auto

settings.c

@@ -72,6 +72,9 @@ static void set_defaults(void)
       case AUDIO_XAUDIO:
          def_audio = "xaudio";
          break;
+      case AUDIO_PULSE:
+         def_audio = "pulse";
+         break;
       default:
          break;
    }

ssnes.cfg

@@ -19,7 +19,7 @@
 # Video vsync.
 # video_vsync = true
 
-# Smoothens picture with bilinear filtering. Should be disabled if using Cg shaders.
+# Smoothens picture with bilinear filtering. Should be disabled if using pixel shaders.
 # video_smooth = true
 
 # Forces rendering area to stay equal to SNES aspect ratio 4:3 or as defined in video_aspect_ratio.
@@ -28,10 +28,10 @@
 # A floating point value for video aspect ratio (width / height)
 # video_aspect_ratio = 1.333
 
-# Path to Cg shader. If enabled
+# Path to Cg shader.
 # video_cg_shader = "/path/to/cg/shader.cg"
 
-# Path to bSNES-style XML shader. If both Cg shader path and XML shader path are defined, Cg shader will take priority.
+# Path to bSNES-style XML shader (GLSL only). If both Cg shader path and XML shader path are defined, Cg shader will take priority.
 # video_bsnes_shader = "/path/to/bsnes/xml/shader.shader"
 
 # CPU-based filter. Valid ones are: hq2x, hq4x, grayscale, bleed, ntsc.
@@ -43,7 +43,8 @@
 # Size of the TTF font rendered.
 # video_font_size = 48
 
-# Offset for where messages will be placed on screen. Values are in range 0.0 to 1.0 for both x and y values.
+# Offset for where messages will be placed on screen. Values are in range 0.0 to 1.0 for both x and y values. 
+# [0.0, 0.0] maps to the lower left corner of the screen.
 # video_message_pos_x = 0.05
 # video_message_pox_y = 0.05
 
@@ -61,10 +62,10 @@
 # but lots of dropped frames. Reasonable values for this is 32000 +/- 100 Hz.
 # audio_in_rate = 31980
 
-# Audio driver backend. Depending on configuration possible candidates are: alsa, oss, jack, rsound, roar, openal, sdl and xaudio
+# Audio driver backend. Depending on configuration possible candidates are: alsa, pulse, oss, jack, rsound, roar, openal, sdl and xaudio
 # audio_driver =
 
-# Override the default audio device the audio_driver uses.
+# Override the default audio device the audio_driver uses. This is driver dependant. E.g. ALSA wants a PCM device, OSS wants a path (e.g. /dev/dsp), Jack wants portnames (e.g. system:playback1,system:playback_2), and so on ...
 # audio_device =
 
 # Will sync (block) on audio. Recommended.
@@ -73,7 +74,7 @@
 # Desired audio latency in milliseconds. Might not be honored if driver can't provide given latency.
 # audio_latency = 64
 
-# libsamplerate quality. Valid values are from 1 to 5. These values map to zero_order_hold, linear, sinc_fastest, sinc_medium and sinc_best.
+# libsamplerate quality. Valid values are from 1 to 5. These values map to zero_order_hold, linear, sinc_fastest, sinc_medium and sinc_best respectively.
 # audio_src_quality =
 
 ### Input
@@ -98,11 +99,14 @@
 # input_player1_up = up
 # input_player1_down = down
 
-# If desired, it is possible to override which joypads are being used for player 1 and 2. First joypad available is 0.
+# If desired, it is possible to override which joypads are being used for player 1 through 5. First joypad available is 0.
 # input_player1_joypad_index = 0
 # input_player2_joypad_index = 1
+# input_player3_joypad_index = 2
+# input_player4_joypad_index = 3
+# input_player5_joypad_index = 4
 
-# Joypad buttons. Figure these out by looking at jstest /dev/input/js0 output.
+# Joypad buttons. Figure these out by looking at jstest /dev/input/js0 output, or use ssnes-joyconfig.
 # You can use joypad hats with hnxx, where n is the hat, and xx is a string representing direction. 
 # E.g. "h0up"
 # input_player1_a_btn = 1
@@ -118,7 +122,7 @@
 # input_player1_up_btn = 13
 # input_player1_down_btn = 14
 
-# Axis for DPAD. 
+# Axis for SNES DPAD. 
 # Needs to be either '+' or '-' in the first character signaling either positive or negative direction of the axis, then the axis number. 
 # Do note that every other input option has the corresponding _btn and _axis binds as well; they are omitted here for clarity.
 # input_player1_left_axis = -0
@@ -159,6 +163,8 @@
 # input_player2_up_axis = -1
 # input_player2_down_axis = +1
 
+# This goes all the way to player 5, but again omitted for clarity.
+
 # Toggles fullscreen.
 # input_toggle_fullscreen = f
 # Saves state.