src/pulseutil.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of gst-pulse.
   5
   6   gst-pulse is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU Lesser General Public License as
   8   published by the Free Software Foundation; either version 2.1 of the
   9   License, or (at your option) any later version.
  10
  11   gst-pulse is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public
  17   License along with gst-pulse; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include "config.h"
  24 #endif
  25
  26 #include "pulseutil.h"
  27 #include <gst/audio/multichannel.h>
  28
  29 static pa_channel_position_t gst_pos_to_pa[GST_AUDIO_CHANNEL_POSITION_NUM]  = {
  30     [GST_AUDIO_CHANNEL_POSITION_FRONT_MONO]            = PA_CHANNEL_POSITION_MONO,
  31     [GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT]            = PA_CHANNEL_POSITION_FRONT_LEFT,
  32     [GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT]           = PA_CHANNEL_POSITION_FRONT_RIGHT,
  33     [GST_AUDIO_CHANNEL_POSITION_REAR_CENTER]           = PA_CHANNEL_POSITION_REAR_CENTER,
  34     [GST_AUDIO_CHANNEL_POSITION_REAR_LEFT]             = PA_CHANNEL_POSITION_REAR_LEFT,
  35     [GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT]            = PA_CHANNEL_POSITION_REAR_RIGHT,
  36     [GST_AUDIO_CHANNEL_POSITION_LFE]                   = PA_CHANNEL_POSITION_LFE,
  37     [GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER]          = PA_CHANNEL_POSITION_FRONT_CENTER,
  38     [GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER]  = PA_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER,
  39     [GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER] = PA_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER,
  40     [GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT]             = PA_CHANNEL_POSITION_SIDE_LEFT,
  41     [GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT]            = PA_CHANNEL_POSITION_SIDE_RIGHT,
  42     [GST_AUDIO_CHANNEL_POSITION_NONE]                  = PA_CHANNEL_POSITION_INVALID
  43 };
  44
  45 gboolean gst_pulse_fill_sample_spec(GstRingBufferSpec *spec, pa_sample_spec *ss) {
  46
  47     if (spec->format == GST_MU_LAW && spec->width == 8)
  48         ss->format = PA_SAMPLE_ULAW;
  49     else if (spec->format == GST_A_LAW && spec->width == 8)
  50         ss->format = PA_SAMPLE_ALAW;
  51     else if (spec->format == GST_U8 && spec->width == 8)
  52         ss->format = PA_SAMPLE_U8;
  53     else if (spec->format == GST_S16_LE && spec->width == 16)
  54         ss->format = PA_SAMPLE_S16LE;
  55     else if (spec->format == GST_S16_BE && spec->width == 16)
  56         ss->format = PA_SAMPLE_S16BE;
  57     else if (spec->format == GST_FLOAT32_LE && spec->width == 32)
  58         ss->format = PA_SAMPLE_FLOAT32LE;
  59     else if (spec->format == GST_FLOAT32_BE && spec->width == 32)
  60         ss->format = PA_SAMPLE_FLOAT32BE;
  61     else
  62         return FALSE;
  63
  64     ss->channels = spec->channels;
  65     ss->rate = spec->rate;
  66
  67     if (!pa_sample_spec_valid(ss))
  68         return FALSE;
  69
  70     return TRUE;
  71 }
  72
  73 gchar *gst_pulse_client_name(void) {
  74     gchar buf[PATH_MAX];
  75     const char *c;
  76
  77     if ((c = g_get_application_name()))
  78         return g_strdup_printf("%s", c);
  79     else if (pa_get_binary_name(buf, sizeof(buf)))
  80         return g_strdup_printf("%s", buf);
  81     else
  82         return g_strdup("GStreamer");
  83 }
  84
  85 pa_channel_map* gst_pulse_gst_to_channel_map(pa_channel_map* map, GstRingBufferSpec *spec) {
  86     int i;
  87     GstAudioChannelPosition* pos;
  88
  89     pa_channel_map_init(map);
  90
  91     if (!(pos = gst_audio_get_channel_positions(gst_caps_get_structure(spec->caps, 0)))) {
  92 /*         g_debug("%s: No channel positions!\n", G_STRFUNC); */
  93         return NULL;
  94     }
  95
  96 /*     g_debug("%s: Got channel positions:\n", G_STRFUNC); */
  97
  98     for (i = 0; i < spec->channels; i++) {
  99
 100         if (pos[i] == GST_AUDIO_CHANNEL_POSITION_NONE) {
 101             /* no valid mappings for these channels */
 102             g_free(pos);
 103             return NULL;
 104         } else if (pos[i] < GST_AUDIO_CHANNEL_POSITION_NUM)
 105             map->map[i] = gst_pos_to_pa[pos[i]];
 106         else
 107             map->map[i] = PA_CHANNEL_POSITION_INVALID;
 108
 109         /*g_debug("  channel %d: gst: %d pulse: %d\n", i, pos[i], map->map[i]);*/
 110     }
 111
 112     g_free(pos);
 113     map->channels = spec->channels;
 114
 115     if (!pa_channel_map_valid(map)) {
 116 /*         g_debug("generated invalid map!\n"); */
 117         return NULL;
 118     }
 119
 120     return map;
 121 }