mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-05 09:00:54 +00:00
114 lines
3.8 KiB
C
114 lines
3.8 KiB
C
/* GStreamer Jack utility functions
|
|
* Copyright (C) 2010 Tristan Matthews <tristan@sat.qc.ca>
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#include "gstjackutil.h"
|
|
#include <gst/audio/multichannel.h>
|
|
|
|
static const GstAudioChannelPosition default_positions[8][8] = {
|
|
/* 1 channel */
|
|
{
|
|
GST_AUDIO_CHANNEL_POSITION_FRONT_MONO,
|
|
},
|
|
/* 2 channels */
|
|
{
|
|
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
|
|
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
|
|
},
|
|
/* 3 channels (2.1) */
|
|
{
|
|
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
|
|
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
|
|
GST_AUDIO_CHANNEL_POSITION_LFE, /* or FRONT_CENTER for 3.0? */
|
|
},
|
|
/* 4 channels (4.0 or 3.1?) */
|
|
{
|
|
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
|
|
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
|
|
GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
|
|
GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT,
|
|
},
|
|
/* 5 channels */
|
|
{
|
|
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
|
|
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
|
|
GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
|
|
GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT,
|
|
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
|
|
},
|
|
/* 6 channels */
|
|
{
|
|
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
|
|
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
|
|
GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
|
|
GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT,
|
|
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
|
|
GST_AUDIO_CHANNEL_POSITION_LFE,
|
|
},
|
|
/* 7 channels */
|
|
{
|
|
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
|
|
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
|
|
GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
|
|
GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT,
|
|
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
|
|
GST_AUDIO_CHANNEL_POSITION_LFE,
|
|
GST_AUDIO_CHANNEL_POSITION_REAR_CENTER,
|
|
},
|
|
/* 8 channels */
|
|
{
|
|
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
|
|
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
|
|
GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
|
|
GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT,
|
|
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
|
|
GST_AUDIO_CHANNEL_POSITION_LFE,
|
|
GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT,
|
|
GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT,
|
|
}
|
|
};
|
|
|
|
|
|
/* if channels are less than or equal to 8, we set a default layout,
|
|
* otherwise set layout to an array of GST_AUDIO_CHANNEL_POSITION_NONE */
|
|
void
|
|
gst_jack_set_layout_on_caps (GstCaps ** caps, gint channels)
|
|
{
|
|
int c;
|
|
GValue pos = { 0 };
|
|
GValue chanpos = { 0 };
|
|
gst_caps_unref (*caps);
|
|
|
|
if (channels <= 8) {
|
|
g_assert (channels >= 1);
|
|
gst_audio_set_channel_positions (gst_caps_get_structure (*caps, 0),
|
|
default_positions[channels - 1]);
|
|
} else {
|
|
g_value_init (&chanpos, GST_TYPE_ARRAY);
|
|
g_value_init (&pos, GST_TYPE_AUDIO_CHANNEL_POSITION);
|
|
for (c = 0; c < channels; c++) {
|
|
g_value_set_enum (&pos, GST_AUDIO_CHANNEL_POSITION_NONE);
|
|
gst_value_array_append_value (&chanpos, &pos);
|
|
}
|
|
g_value_unset (&pos);
|
|
gst_structure_set_value (gst_caps_get_structure (*caps, 0),
|
|
"channel-positions", &chanpos);
|
|
g_value_unset (&chanpos);
|
|
}
|
|
gst_caps_ref (*caps);
|
|
}
|