mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-25 11:11:08 +00:00
audio: Add documentation for the new functions
This commit is contained in:
Sebastian Dröge
parent
c9c12372a5
commit
9e930a1ade
1 changed files with 132 additions and 70 deletions
|
|
@ -922,76 +922,21 @@ gst_audio_buffer_clip (GstBuffer * buffer, GstSegment * segment, gint rate,
|
|||
return ret;
|
||||
}
|
||||
|
||||
gboolean
|
||||
gst_audio_buffer_reorder_channels (GstBuffer * buffer,
|
||||
GstAudioFormat format, gint channels,
|
||||
const GstAudioChannelPosition * from, const GstAudioChannelPosition * to)
|
||||
{
|
||||
gsize size;
|
||||
guint8 *data;
|
||||
gboolean ret;
|
||||
|
||||
g_return_val_if_fail (GST_IS_BUFFER (buffer), FALSE);
|
||||
|
||||
data = gst_buffer_map (buffer, &size, NULL, GST_MAP_READ | GST_MAP_WRITE);
|
||||
|
||||
ret = gst_audio_reorder_channels (data, size, format, channels, from, to);
|
||||
|
||||
gst_buffer_unmap (buffer, data, size);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
gboolean
|
||||
gst_audio_check_valid_channel_positions (const GstAudioChannelPosition *
|
||||
position, gint channels, gboolean force_order)
|
||||
{
|
||||
return check_valid_channel_positions (position, channels, force_order, NULL);
|
||||
}
|
||||
|
||||
gboolean
|
||||
gst_audio_get_channel_reorder_map (gint channels,
|
||||
const GstAudioChannelPosition * from, const GstAudioChannelPosition * to,
|
||||
gint * reorder_map)
|
||||
{
|
||||
gint i, j;
|
||||
|
||||
g_return_val_if_fail (reorder_map != NULL, FALSE);
|
||||
g_return_val_if_fail (channels > 0, FALSE);
|
||||
g_return_val_if_fail (from != NULL, FALSE);
|
||||
g_return_val_if_fail (to != NULL, FALSE);
|
||||
g_return_val_if_fail (check_valid_channel_positions (from, channels, FALSE,
|
||||
NULL), FALSE);
|
||||
g_return_val_if_fail (check_valid_channel_positions (to, channels, FALSE,
|
||||
NULL), FALSE);
|
||||
|
||||
/* Build reorder map and check compatibility */
|
||||
for (i = 0; i < channels; i++) {
|
||||
if (from[i] == GST_AUDIO_CHANNEL_POSITION_NONE
|
||||
|| to[i] == GST_AUDIO_CHANNEL_POSITION_NONE)
|
||||
return FALSE;
|
||||
if (from[i] == GST_AUDIO_CHANNEL_POSITION_INVALID
|
||||
|| to[i] == GST_AUDIO_CHANNEL_POSITION_INVALID)
|
||||
return FALSE;
|
||||
if (from[i] == GST_AUDIO_CHANNEL_POSITION_MONO
|
||||
|| to[i] == GST_AUDIO_CHANNEL_POSITION_MONO)
|
||||
return FALSE;
|
||||
|
||||
for (j = 0; j < channels; j++) {
|
||||
if (from[i] == to[j]) {
|
||||
reorder_map[i] = j;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/* Not all channels present in both */
|
||||
if (j == channels)
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
/**
|
||||
* gst_audio_reorder_channels:
|
||||
* @data: The pointer to the memory.
|
||||
* @size: The size of the memory.
|
||||
* @format: The %GstAudioFormat of the buffer.
|
||||
* @channels: The number of channels.
|
||||
* @from: The channel positions in the buffer.
|
||||
* @to: The channel positions to convert to.
|
||||
*
|
||||
* Reorders @data from the channel positions @from to the channel
|
||||
* positions @to. @from and @to must contain the same number of
|
||||
* positions and the same positions, only in a different order.
|
||||
*
|
||||
* Returns: %TRUE if the reordering was possible.
|
||||
*/
|
||||
gboolean
|
||||
gst_audio_reorder_channels (gpointer data, gsize size, GstAudioFormat format,
|
||||
gint channels, const GstAudioChannelPosition * from,
|
||||
|
|
@ -1041,3 +986,120 @@ gst_audio_reorder_channels (gpointer data, gsize size, GstAudioFormat format,
|
|||
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
/**
|
||||
* gst_audio_buffer_reorder_channels:
|
||||
* @buffer: The buffer to reorder.
|
||||
* @format: The %GstAudioFormat of the buffer.
|
||||
* @channels: The number of channels.
|
||||
* @from: The channel positions in the buffer.
|
||||
* @to: The channel positions to convert to.
|
||||
*
|
||||
* Reorders @buffer from the channel positions @from to the channel
|
||||
* positions @to. @from and @to must contain the same number of
|
||||
* positions and the same positions, only in a different order.
|
||||
* @buffer must be writable.
|
||||
*
|
||||
* Returns: %TRUE if the reordering was possible.
|
||||
*/
|
||||
gboolean
|
||||
gst_audio_buffer_reorder_channels (GstBuffer * buffer,
|
||||
GstAudioFormat format, gint channels,
|
||||
const GstAudioChannelPosition * from, const GstAudioChannelPosition * to)
|
||||
{
|
||||
gsize size;
|
||||
guint8 *data;
|
||||
gboolean ret;
|
||||
|
||||
g_return_val_if_fail (GST_IS_BUFFER (buffer), FALSE);
|
||||
g_return_val_if_fail (gst_buffer_is_writable (buffer), FALSE);
|
||||
|
||||
data = gst_buffer_map (buffer, &size, NULL, GST_MAP_READ | GST_MAP_WRITE);
|
||||
|
||||
ret = gst_audio_reorder_channels (data, size, format, channels, from, to);
|
||||
|
||||
gst_buffer_unmap (buffer, data, size);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
* gst_audio_check_valid_channel_positions:
|
||||
* @position: The %GstAudioChannelPositions to check.
|
||||
* @channels: The number of channels.
|
||||
* @force_order: Only consider the GStreamer channel order.
|
||||
*
|
||||
* Checks if @position contains valid channel positions for
|
||||
* @channels channels. If @force_order is %TRUE it additionally
|
||||
* checks if the channels are in the order required by GStreamer.
|
||||
*
|
||||
* Returns: %TRUE if the channel positions are valid.
|
||||
*/
|
||||
gboolean
|
||||
gst_audio_check_valid_channel_positions (const GstAudioChannelPosition *
|
||||
position, gint channels, gboolean force_order)
|
||||
{
|
||||
return check_valid_channel_positions (position, channels, force_order, NULL);
|
||||
}
|
||||
|
||||
/**
|
||||
* gst_audio_get_channel_reorder_map:
|
||||
* @channels: The number of channels.
|
||||
* @from: The channel positions to reorder from.
|
||||
* @to: The channel positions to reorder to.
|
||||
* @reorder_map: Pointer to the reorder map.
|
||||
*
|
||||
* Returns a reorder map for @from to @to that can be used in
|
||||
* custom channel reordering code, e.g. to convert from or to the
|
||||
* GStreamer channel order. @from and @to must contain the same
|
||||
* number of positions and the same positions, only in a
|
||||
* different order.
|
||||
*
|
||||
* The resulting @reorder_map can be used for reordering by assigning
|
||||
* channel i of the input to channel reorder_map[i] of the output.
|
||||
*
|
||||
* Returns: %TRUE if the channel positions are valid and reordering
|
||||
* is possible.
|
||||
*/
|
||||
gboolean
|
||||
gst_audio_get_channel_reorder_map (gint channels,
|
||||
const GstAudioChannelPosition * from, const GstAudioChannelPosition * to,
|
||||
gint * reorder_map)
|
||||
{
|
||||
gint i, j;
|
||||
|
||||
g_return_val_if_fail (reorder_map != NULL, FALSE);
|
||||
g_return_val_if_fail (channels > 0, FALSE);
|
||||
g_return_val_if_fail (from != NULL, FALSE);
|
||||
g_return_val_if_fail (to != NULL, FALSE);
|
||||
g_return_val_if_fail (check_valid_channel_positions (from, channels, FALSE,
|
||||
NULL), FALSE);
|
||||
g_return_val_if_fail (check_valid_channel_positions (to, channels, FALSE,
|
||||
NULL), FALSE);
|
||||
|
||||
/* Build reorder map and check compatibility */
|
||||
for (i = 0; i < channels; i++) {
|
||||
if (from[i] == GST_AUDIO_CHANNEL_POSITION_NONE
|
||||
|| to[i] == GST_AUDIO_CHANNEL_POSITION_NONE)
|
||||
return FALSE;
|
||||
if (from[i] == GST_AUDIO_CHANNEL_POSITION_INVALID
|
||||
|| to[i] == GST_AUDIO_CHANNEL_POSITION_INVALID)
|
||||
return FALSE;
|
||||
if (from[i] == GST_AUDIO_CHANNEL_POSITION_MONO
|
||||
|| to[i] == GST_AUDIO_CHANNEL_POSITION_MONO)
|
||||
return FALSE;
|
||||
|
||||
for (j = 0; j < channels; j++) {
|
||||
if (from[i] == to[j]) {
|
||||
reorder_map[i] = j;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/* Not all channels present in both */
|
||||
if (j == channels)
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue