mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-07-10 08:35:58 +00:00
Code Issues 1 Projects Releases Wiki Activity

audio: Add function to reorder channel positions from any order to the GStreamer order

Browse source
This commit is contained in:
Sebastian Dröge 2011-12-31 13:33:01 +01:00
parent bd40936409
commit e2c6b8ec4d
2 changed files with 48 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

45
gst-libs/gst/audio/audio.c
View file

@ -1103,3 +1103,48 @@ gst_audio_get_channel_reorder_map (gint channels,
return TRUE;
}
/**
* gst_audio_channel_positions_to_valid_order:
* @position: The channel positions to reorder to.
* @channels: The number of channels.
*
* Reorders the channel positions in @position from any order to
* the GStreamer channel order.
*
* Returns: %TRUE if the channel positions are valid and reordering
* was successful.
*/
gboolean
gst_audio_channel_positions_to_valid_order (GstAudioChannelPosition * position,
gint channels)
{
GstAudioChannelPosition tmp[64];
guint64 channel_mask = 0;
gint i, j;
g_return_val_if_fail (channels > 0, FALSE);
g_return_val_if_fail (position != NULL, FALSE);
g_return_val_if_fail (check_valid_channel_positions (position, channels,
FALSE, NULL), FALSE);
if (channels == 1 && position[0] == GST_AUDIO_CHANNEL_POSITION_MONO)
return TRUE;
if (position[0] == GST_AUDIO_CHANNEL_POSITION_NONE)
return TRUE;
check_valid_channel_positions (position, channels, FALSE, &channel_mask);
memset (tmp, 0xff, sizeof (tmp));
j = 0;
for (i = 0; i < 64; i++) {
if ((channel_mask & (G_GUINT64_CONSTANT (1) << i))) {
tmp[j] = i;
j++;
}
}
memcpy (position, tmp, sizeof (tmp[0]) * channels);
return TRUE;
}

3
gst-libs/gst/audio/audio.h
View file

@ -532,6 +532,9 @@ gboolean gst_audio_reorder_channels (gpointer data, gsize size,
const GstAudioChannelPosition * from,
const GstAudioChannelPosition * to);
gboolean gst_audio_channel_positions_to_valid_order (GstAudioChannelPosition *position,
gint channels);
gboolean gst_audio_check_valid_channel_positions (const GstAudioChannelPosition *position,
gint channels, gboolean force_order);