1 files changed, 138 insertions, 0 deletions
diff --git a/ext/pulse/pulseutil.c b/ext/pulse/pulseutil.c
new file mode 100644
index 00000000..518bce2f
--- /dev/null
+++ b/ext/pulse/pulseutil.c
@@ -0,0 +1,138 @@
+/*
+ *  GStreamer pulseaudio plugin
+ *
+ *  Copyright (c) 2004-2008 Lennart Poettering
+ *
+ *  gst-pulse is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU Lesser General Public License as
+ *  published by the Free Software Foundation; either version 2.1 of the
+ *  License, or (at your option) any later version.
+ *
+ *  gst-pulse 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
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with gst-pulse; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ *  USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "pulseutil.h"
+#include <gst/audio/multichannel.h>
+
+static const pa_channel_position_t gst_pos_to_pa[GST_AUDIO_CHANNEL_POSITION_NUM]
+    = {
+  [GST_AUDIO_CHANNEL_POSITION_FRONT_MONO] = PA_CHANNEL_POSITION_MONO,
+  [GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT] = PA_CHANNEL_POSITION_FRONT_LEFT,
+  [GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT] = PA_CHANNEL_POSITION_FRONT_RIGHT,
+  [GST_AUDIO_CHANNEL_POSITION_REAR_CENTER] = PA_CHANNEL_POSITION_REAR_CENTER,
+  [GST_AUDIO_CHANNEL_POSITION_REAR_LEFT] = PA_CHANNEL_POSITION_REAR_LEFT,
+  [GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT] = PA_CHANNEL_POSITION_REAR_RIGHT,
+  [GST_AUDIO_CHANNEL_POSITION_LFE] = PA_CHANNEL_POSITION_LFE,
+  [GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER] = PA_CHANNEL_POSITION_FRONT_CENTER,
+  [GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER] =
+      PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER,
+  [GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER] =
+      PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER,
+  [GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT] = PA_CHANNEL_POSITION_SIDE_LEFT,
+  [GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT] = PA_CHANNEL_POSITION_SIDE_RIGHT,
+  [GST_AUDIO_CHANNEL_POSITION_NONE] = PA_CHANNEL_POSITION_INVALID
+};
+
+gboolean
+gst_pulse_fill_sample_spec (GstRingBufferSpec * spec, pa_sample_spec * ss)
+{
+
+  if (spec->format == GST_MU_LAW && spec->width == 8)
+    ss->format = PA_SAMPLE_ULAW;
+  else if (spec->format == GST_A_LAW && spec->width == 8)
+    ss->format = PA_SAMPLE_ALAW;
+  else if (spec->format == GST_U8 && spec->width == 8)
+    ss->format = PA_SAMPLE_U8;
+  else if (spec->format == GST_S16_LE && spec->width == 16)
+    ss->format = PA_SAMPLE_S16LE;
+  else if (spec->format == GST_S16_BE && spec->width == 16)
+    ss->format = PA_SAMPLE_S16BE;
+  else if (spec->format == GST_FLOAT32_LE && spec->width == 32)
+    ss->format = PA_SAMPLE_FLOAT32LE;
+  else if (spec->format == GST_FLOAT32_BE && spec->width == 32)
+    ss->format = PA_SAMPLE_FLOAT32BE;
+  else if (spec->format == GST_S32_LE && spec->width == 32)
+    ss->format = PA_SAMPLE_S32LE;
+  else if (spec->format == GST_S32_BE && spec->width == 32)
+    ss->format = PA_SAMPLE_S32BE;
+  else
+    return FALSE;
+
+  ss->channels = spec->channels;
+  ss->rate = spec->rate;
+
+  if (!pa_sample_spec_valid (ss))
+    return FALSE;
+
+  return TRUE;
+}
+
+gchar *
+gst_pulse_client_name (void)
+{
+  gchar buf[PATH_MAX];
+
+  const char *c;
+
+  if ((c = g_get_application_name ()))
+    return g_strdup_printf ("%s", c);
+  else if (pa_get_binary_name (buf, sizeof (buf)))
+    return g_strdup_printf ("%s", buf);
+  else
+    return g_strdup ("GStreamer");
+}
+
+pa_channel_map *
+gst_pulse_gst_to_channel_map (pa_channel_map * map, GstRingBufferSpec * spec)
+{
+  int i;
+
+  GstAudioChannelPosition *pos;
+
+  pa_channel_map_init (map);
+
+  if (!(pos =
+          gst_audio_get_channel_positions (gst_caps_get_structure (spec->caps,
+                  0)))) {
+/*         g_debug("%s: No channel positions!\n", G_STRFUNC); */
+    return NULL;
+  }
+
+/*     g_debug("%s: Got channel positions:\n", G_STRFUNC); */
+
+  for (i = 0; i < spec->channels; i++) {
+
+    if (pos[i] == GST_AUDIO_CHANNEL_POSITION_NONE) {
+      /* no valid mappings for these channels */
+      g_free (pos);
+      return NULL;
+    } else if (pos[i] < GST_AUDIO_CHANNEL_POSITION_NUM)
+      map->map[i] = gst_pos_to_pa[pos[i]];
+    else
+      map->map[i] = PA_CHANNEL_POSITION_INVALID;
+
+    /*g_debug("  channel %d: gst: %d pulse: %d\n", i, pos[i], map->map[i]); */
+  }
+
+  g_free (pos);
+  map->channels = spec->channels;
+
+  if (!pa_channel_map_valid (map)) {
+/*         g_debug("generated invalid map!\n"); */
+    return NULL;
+  }
+
+  return map;
+}