For SunAudio audio playback. We need to investigate whether we care about
this or whether we are just going to support PulseAudio.

diff --git a/media/libcubeb/src/cubeb.c b/media/libcubeb/src/cubeb.c
--- a/media/libcubeb/src/cubeb.c
+++ b/media/libcubeb/src/cubeb.c
@@ -56,6 +56,9 @@
 #if defined(USE_AUDIOTRACK)
 int audiotrack_init(cubeb ** context, char const * context_name);
 #endif
+#if defined(USE_SUN)
+int sunaudio_init(cubeb ** context, char const * context_name);
+#endif
 
 int
 validate_stream_params(cubeb_stream_params stream_params)
@@ -122,6 +125,9 @@
 #if defined(USE_AUDIOTRACK)
     audiotrack_init,
 #endif
+#if defined(USE_SUN)
+    sunaudio_init,
+#endif
   };
   int i;
 
diff --git a/media/libcubeb/src/moz.build b/media/libcubeb/src/moz.build
--- a/media/libcubeb/src/moz.build
+++ b/media/libcubeb/src/moz.build
@@ -31,6 +31,12 @@
     ]
     DEFINES['USE_SNDIO'] = True
 
+if CONFIG['OS_ARCH'] == 'SunOS':
+    SOURCES += [
+        'cubeb_sun.c',
+    ]
+    DEFINES['USE_SUN'] = True
+
 if CONFIG['OS_TARGET'] == 'Darwin':
     SOURCES += [
         'cubeb_audiounit.c',
diff --git a/media/libcubeb/src/cubeb_sun.c b/media/libcubeb/src/cubeb_sun.c
new file mode 100644
--- /dev/null
+++ b/media/libcubeb/src/cubeb_sun.c
@@ -0,0 +1,500 @@
+/*
+ * Copyright (c) 2013 Ginn Chen <[email protected]>
+ *
+ * This program is made available under an ISC-style license.  See the
+ * accompanying file LICENSE for details.
+ */
+#include <poll.h>
+#include <pthread.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/audio.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <sys/stropts.h>
+#include "cubeb/cubeb.h"
+#include "cubeb-internal.h"
+
+/* Macros copied from audio_oss.h */
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (C) 4Front Technologies 1996-2008.
+ *
+ * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+#define OSSIOCPARM_MASK 0x1fff          /* parameters must be < 8192 bytes */
+#define OSSIOC_VOID     0x00000000      /* no parameters */
+#define OSSIOC_OUT      0x20000000      /* copy out parameters */
+#define OSSIOC_IN       0x40000000      /* copy in parameters */
+#define OSSIOC_INOUT    (OSSIOC_IN|OSSIOC_OUT)
+#define OSSIOC_SZ(t)    ((sizeof (t) & OSSIOCPARM_MASK) << 16)
+#define __OSSIO(x, y)           ((int)(OSSIOC_VOID|(x<<8)|y))
+#define __OSSIOR(x, y, t)       ((int)(OSSIOC_OUT|OSSIOC_SZ(t)|(x<<8)|y))
+#define __OSSIOWR(x, y, t)      ((int)(OSSIOC_INOUT|OSSIOC_SZ(t)|(x<<8)|y))
+#define SNDCTL_DSP_SPEED        __OSSIOWR('P', 2, int)
+#define SNDCTL_DSP_CHANNELS     __OSSIOWR('P', 6, int)
+#define SNDCTL_DSP_SETFMT       __OSSIOWR('P', 5, int)  /* Selects ONE fmt */
+#define SNDCTL_DSP_GETODELAY    __OSSIOR('P', 23, int)
+#define SNDCTL_DSP_HALT_OUTPUT  __OSSIO('P', 34)
+#define AFMT_S16_LE     0x00000010
+#define AFMT_S16_BE     0x00000020
+
+#if defined(WORDS_BIGENDIAN) || defined(__BIG_ENDIAN__)
+#define AFMT_S16_NE    AFMT_S16_BE
+#else
+#define AFMT_S16_NE    AFMT_S16_LE
+#endif
+
+#define DEFAULT_AUDIO_DEVICE "/dev/audio"
+#define DEFAULT_DSP_DEVICE   "/dev/dsp"
+
+#define BUF_SIZE_MS 10
+
+#if defined(CUBEB_SUNAUDIO_DEBUG)
+#define DPR(...) fprintf(stderr, __VA_ARGS__);
+#else
+#define DPR(...) do {} while(0)
+#endif
+
+static struct cubeb_ops const sunaudio_ops;
+
+struct cubeb {
+  struct cubeb_ops const * ops;
+};
+
+struct cubeb_stream {
+  cubeb * context;
+  pthread_t th;			  /* to run real-time audio i/o */
+  pthread_mutex_t mutex;	  /* protects fd and frm_played */
+  int fd;			  /* link us to sunaudio */
+  int active;			  /* cubec_start() called */
+  int conv;			  /* need float->s16 conversion */
+  int using_oss;
+  unsigned char *buf;		  /* data is prepared here */
+  unsigned int rate;
+  unsigned int n_channles;
+  unsigned int bytes_per_ch;
+  unsigned int n_frm;
+  unsigned int buffer_size;
+  int64_t frm_played;
+  cubeb_data_callback data_cb;    /* cb to preapare data */
+  cubeb_state_callback state_cb;  /* cb to notify about state changes */
+  void *arg;			  /* user arg to {data,state}_cb */
+};
+
+static void
+float_to_s16(void *ptr, long nsamp)
+{
+  int16_t *dst = ptr;
+  float *src = ptr;
+
+  while (nsamp-- > 0)
+    *(dst++) = *(src++) * 32767;
+}
+
+static void *
+sunaudio_mainloop(void *arg)
+{
+  struct cubeb_stream *s = arg;
+  int state;
+
+  DPR("sunaudio_mainloop()\n");
+
+  s->state_cb(s, s->arg, CUBEB_STATE_STARTED);
+
+  pthread_mutex_lock(&s->mutex);
+  DPR("sunaudio_mainloop(), started\n");
+
+  for (;;) {
+    if (!s->active) {
+      DPR("sunaudio_mainloop() stopped\n");
+      state = CUBEB_STATE_STOPPED;
+      break;
+    }
+
+    if (!s->using_oss) {
+      audio_info_t info;
+      ioctl(s->fd, AUDIO_GETINFO, &info);
+      if (s->frm_played > info.play.samples + 3 * s->n_frm) {
+        pthread_mutex_unlock(&s->mutex);
+        struct timespec ts = {0, 10000}; // 10 ms
+        nanosleep(&ts, NULL);
+        pthread_mutex_lock(&s->mutex);
+        continue;
+      }
+    }
+
+    pthread_mutex_unlock(&s->mutex);
+    unsigned int got = s->data_cb(s, s->arg, s->buf, s->n_frm);
+    DPR("sunaudio_mainloop() ask %d got %d\n", s->n_frm, got);
+    pthread_mutex_lock(&s->mutex);
+
+    if (got < 0) {
+      DPR("sunaudio_mainloop() cb err\n");
+      state = CUBEB_STATE_ERROR;
+      break;
+    }
+
+    if (s->conv) {
+      float_to_s16(s->buf, got * s->n_channles);
+    }
+
+    unsigned int avail = got * 2 * s->n_channles; // coverted to s16
+    unsigned int pos = 0;
+
+    while (avail > 0 && s->active) {
+      int written = write(s->fd, s->buf + pos, avail);
+      if (written == -1) {
+        if (errno != EINTR && errno != EWOULDBLOCK) {
+          DPR("sunaudio_mainloop() write err\n");
+          state = CUBEB_STATE_ERROR;
+          break;
+        }
+        pthread_mutex_unlock(&s->mutex);
+        struct timespec ts = {0, 10000}; // 10 ms
+        nanosleep(&ts, NULL);
+        pthread_mutex_lock(&s->mutex);
+      } else {
+        pos += written;
+        DPR("sunaudio_mainloop() write %d pos %d\n", written, pos);
+        s->frm_played += written / 2 / s->n_channles;
+        avail -= written;
+      }
+    }
+
+    if ((got  < s->n_frm)) {
+      DPR("sunaudio_mainloop() drained\n");
+      state = CUBEB_STATE_DRAINED;
+      break;
+    }
+  }
+
+  pthread_mutex_unlock(&s->mutex);
+  s->state_cb(s, s->arg, state);
+
+  return NULL;
+}
+
+/*static*/ int
+sunaudio_init(cubeb **context, char const *context_name)
+{
+  DPR("sunaudio_init(%s)\n", context_name);
+  *context = malloc(sizeof(*context));
+  (*context)->ops = &sunaudio_ops;
+  (void)context_name;
+  return CUBEB_OK;
+}
+
+static char const *
+sunaudio_get_backend_id(cubeb *context)
+{
+  return "sunaudio";
+}
+
+static void
+sunaudio_destroy(cubeb *context)
+{
+  DPR("sunaudio_destroy()\n");
+  free(context);
+}
+
+static int
+sunaudio_stream_init(cubeb *context,
+                  cubeb_stream **stream,
+                  char const *stream_name,
+                  cubeb_stream_params stream_params, unsigned int latency,
+                  cubeb_data_callback data_callback,
+                  cubeb_state_callback state_callback,
+                  void *user_ptr)
+{
+  struct cubeb_stream *s;
+  DPR("sunaudio_stream_init(%s)\n", stream_name);
+  size_t size;
+
+  s = malloc(sizeof(struct cubeb_stream));
+  if (s == NULL)
+    return CUBEB_ERROR;
+  s->context = context;
+
+  // If UTAUDIODEV is set, use it with Sun Audio interface
+  char * sa_device_name = getenv("UTAUDIODEV");
+  char * dsp_device_name = NULL;
+  if (!sa_device_name) {
+    dsp_device_name = getenv("AUDIODSP");
+    if (!dsp_device_name) {
+      dsp_device_name = DEFAULT_DSP_DEVICE;
+    }
+    sa_device_name = getenv("AUDIODEV");
+    if (!sa_device_name) {
+      sa_device_name = DEFAULT_AUDIO_DEVICE;
+    }
+  }
+
+  s->using_oss = 0;
+  // Try to use OSS if available
+  if (dsp_device_name) {
+    s->fd = open(dsp_device_name, O_WRONLY | O_NONBLOCK);
+    if (s->fd >= 0) {
+      s->using_oss = 1;
+    }
+  }
+
+  // Try Sun Audio
+  if (!s->using_oss) {
+    s->fd = open(sa_device_name, O_WRONLY | O_NONBLOCK);
+  }
+
+  if (s->fd < 0) {
+    free(s);
+    DPR("sunaudio_stream_init(), open() failed\n");
+    return CUBEB_ERROR;
+  }
+
+  if (s->using_oss) {
+    if (ioctl(s->fd, SNDCTL_DSP_SPEED, &stream_params.rate) < 0) {
+      DPR("ioctl SNDCTL_DSP_SPEED failed.\n");
+      close(s->fd);
+      free(s);
+      return CUBEB_ERROR_INVALID_FORMAT;
+    }
+
+    if (ioctl(s->fd, SNDCTL_DSP_CHANNELS, &stream_params.channels) < 0) {
+      DPR("ioctl SNDCTL_DSP_CHANNELS failed.\n");
+      close(s->fd);
+      free(s);
+      return CUBEB_ERROR_INVALID_FORMAT;
+    }
+
+    int format = AFMT_S16_NE;
+    if (ioctl(s->fd, SNDCTL_DSP_SETFMT, &format) < 0) {
+      DPR("ioctl SNDCTL_DSP_SETFMT failed.\n");
+      close(s->fd);
+      free(s);
+      return CUBEB_ERROR_INVALID_FORMAT;
+    }
+  } else {
+    audio_info_t audio_info;
+    AUDIO_INITINFO(&audio_info)
+    audio_info.play.sample_rate = stream_params.rate;
+    audio_info.play.channels = stream_params.channels;
+    audio_info.play.encoding = AUDIO_ENCODING_LINEAR;
+    audio_info.play.precision = 16;
+    if (ioctl(s->fd, AUDIO_SETINFO, &audio_info) == -1) {
+      DPR("ioctl AUDIO_SETINFO failed.\n");
+      close(s->fd);
+      free(s);
+      return CUBEB_ERROR_INVALID_FORMAT;
+    }
+  }
+
+  s->conv = 0;
+  switch (stream_params.format) {
+    case CUBEB_SAMPLE_S16NE:
+      s->bytes_per_ch = 2;
+      break;
+    case CUBEB_SAMPLE_FLOAT32NE:
+      s->bytes_per_ch = 4;
+      s->conv = 1;
+      break;
+    default:
+      DPR("sunaudio_stream_init() unsupported format\n");
+      close(s->fd);
+      free(s);
+      return CUBEB_ERROR_INVALID_FORMAT;
+  }
+
+  s->active = 0;
+  s->rate = stream_params.rate;
+  s->n_channles = stream_params.channels;
+  s->data_cb = data_callback;
+  s->state_cb = state_callback;
+  s->arg = user_ptr;
+  if (pthread_mutex_init(&s->mutex, NULL) != 0) {
+    free(s);
+    return CUBEB_ERROR;
+  }
+  s->frm_played = 0;
+  s->n_frm = s->rate * BUF_SIZE_MS / 1000;
+  s->buffer_size = s->bytes_per_ch * s->n_channles * s->n_frm;
+  s->buf = malloc(s->buffer_size);
+  if (s->buf == NULL) {
+    close(s->fd);
+    free(s);
+    return CUBEB_ERROR;
+  }
+
+  *stream = s;
+  DPR("sunaudio_stream_init() end, ok\n");
+  return CUBEB_OK;
+}
+
+static void
+sunaudio_stream_destroy(cubeb_stream *s)
+{
+  DPR("sunaudio_stream_destroy()\n");
+  if (s->fd > 0) {
+    // Flush buffer
+    if (s->using_oss) {
+      ioctl(s->fd, SNDCTL_DSP_HALT_OUTPUT);
+    } else {
+      ioctl(s->fd, I_FLUSH);
+    }
+    close(s->fd);
+  }
+  free(s->buf);
+  free(s);
+}
+
+static int
+sunaudio_stream_start(cubeb_stream *s)
+{
+  int err;
+
+  DPR("sunaudio_stream_start()\n");
+  s->active = 1;
+  err = pthread_create(&s->th, NULL, sunaudio_mainloop, s);
+  if (err) {
+    s->active = 0;
+    return CUBEB_ERROR;
+  }
+  return CUBEB_OK;
+}
+
+static int
+sunaudio_stream_stop(cubeb_stream *s)
+{
+  void *dummy;
+
+  DPR("sunaudio_stream_stop()\n");
+  if (s->active) {
+    s->active = 0;
+    pthread_join(s->th, &dummy);
+  }
+  return CUBEB_OK;
+}
+
+static int
+sunaudio_stream_get_position(cubeb_stream *s, uint64_t *p)
+{
+  int rv = CUBEB_OK;
+  pthread_mutex_lock(&s->mutex);
+  if (s->active && s->fd > 0) {
+    if (s->using_oss) {
+      int delay;
+      ioctl(s->fd, SNDCTL_DSP_GETODELAY, &delay);
+      int64_t t = s->frm_played - delay / s->n_channles / 2;
+      if (t < 0) {
+        *p = 0;
+      } else {
+        *p = t;
+      }
+    } else {
+      audio_info_t info;
+      ioctl(s->fd, AUDIO_GETINFO, &info);
+      *p = info.play.samples;
+    }
+    DPR("sunaudio_stream_get_position() %lld\n", *p);
+  } else {
+    rv = CUBEB_ERROR;
+  }
+  pthread_mutex_unlock(&s->mutex);
+  return rv;
+}
+
+static int
+sunaudio_get_max_channel_count(cubeb * ctx, uint32_t * max_channels)
+{
+  if (!ctx || !max_channels)
+    return CUBEB_ERROR;
+
+  *max_channels = 2;
+
+  return CUBEB_OK;
+}
+
+static int
+sunaudio_get_preferred_sample_rate(cubeb * ctx, uint32_t * rate)
+{
+  if (!ctx || !rate)
+    return CUBEB_ERROR;
+
+  // XXX Not yet implemented.
+  *rate = 44100;
+
+  return CUBEB_OK;
+}
+
+static int
+sunaudio_get_min_latency(cubeb * ctx, cubeb_stream_params params, uint32_t * latency_ms)
+{
+  if (!ctx || !latency_ms)
+    return CUBEB_ERROR;
+
+  // XXX Not yet implemented.
+  *latency_ms = 20;
+
+  return CUBEB_OK;
+}
+
+static int
+sunaudio_stream_get_latency(cubeb_stream * s, uint32_t * latency)
+{
+  if (!s || !latency)
+    return CUBEB_ERROR;
+
+  int rv = CUBEB_OK;
+  pthread_mutex_lock(&s->mutex);
+  if (s->active && s->fd > 0) {
+    if (s->using_oss) {
+      int delay;
+      ioctl(s->fd, SNDCTL_DSP_GETODELAY, &delay);
+      *latency = delay / s->n_channles / 2 / s->rate;
+    } else {
+      audio_info_t info;
+      ioctl(s->fd, AUDIO_GETINFO, &info);
+      *latency = (s->frm_played - info.play.samples) / s->rate;
+    }
+    DPR("sunaudio_stream_get_position() %lld\n", *p);
+  } else {
+    rv = CUBEB_ERROR;
+  }
+  pthread_mutex_unlock(&s->mutex);
+  return rv;
+}
+
+static struct cubeb_ops const sunaudio_ops = {
+  .init = sunaudio_init,
+  .get_backend_id = sunaudio_get_backend_id,
+  .destroy = sunaudio_destroy,
+  .get_preferred_sample_rate = sunaudio_get_preferred_sample_rate,
+  .stream_init = sunaudio_stream_init,
+  .stream_destroy = sunaudio_stream_destroy,
+  .stream_start = sunaudio_stream_start,
+  .stream_stop = sunaudio_stream_stop,
+  .stream_get_position = sunaudio_stream_get_position,
+  .get_max_channel_count = sunaudio_get_max_channel_count,
+  .get_min_latency = sunaudio_get_min_latency,
+  .stream_get_latency = sunaudio_stream_get_latency
+};