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gstreamer/gst-libs/gst/audio/audio-channels.h

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audio: split audio header into logical parts
2012-06-08 08:10:08 +00:00
/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* Library <2001> Thomas Vander Stichele <thomas@apestaart.org>
* <2011> Wim Taymans <wim.taymans@gmail.com>
*
* 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
Fix FSF address https://bugzilla.gnome.org/show_bug.cgi?id=687520
2012-11-03 23:05:09 +00:00
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
audio: split audio header into logical parts
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*/
audio: make direct includes work again Not nice to break people's code if we can avoid it. Could add a warning in the next cycle, and then require single includes in the cycle after. https://bugzilla.gnome.org/show_bug.cgi?id=695889
2013-08-16 12:06:58 +00:00
#ifndef __GST_AUDIO_AUDIO_H__
#include <gst/audio/audio.h>
#endif
audio: split audio header into logical parts
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#ifndef __GST_AUDIO_CHANNELS_H__
#define __GST_AUDIO_CHANNELS_H__
G_BEGIN_DECLS
/**
* GstAudioChannelPosition:
* @GST_AUDIO_CHANNEL_POSITION_MONO: Mono without direction;
* can only be used with 1 channel
* @GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT: Front left
* @GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT: Front right
* @GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER: Front center
* @GST_AUDIO_CHANNEL_POSITION_LFE1: Low-frequency effects 1 (subwoofer)
* @GST_AUDIO_CHANNEL_POSITION_REAR_LEFT: Rear left
* @GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT: Rear right
* @GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER: Front left of center
* @GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER: Front right of center
* @GST_AUDIO_CHANNEL_POSITION_REAR_CENTER: Rear center
* @GST_AUDIO_CHANNEL_POSITION_LFE2: Low-frequency effects 2 (subwoofer)
* @GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT: Side left
* @GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT: Side right
* @GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_LEFT: Top front left
* @GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_RIGHT: Top front right
* @GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_CENTER: Top front center
* @GST_AUDIO_CHANNEL_POSITION_TOP_CENTER: Top center
* @GST_AUDIO_CHANNEL_POSITION_TOP_REAR_LEFT: Top rear left
* @GST_AUDIO_CHANNEL_POSITION_TOP_REAR_RIGHT: Top rear right
* @GST_AUDIO_CHANNEL_POSITION_TOP_SIDE_LEFT: Top side right
* @GST_AUDIO_CHANNEL_POSITION_TOP_SIDE_RIGHT: Top rear right
* @GST_AUDIO_CHANNEL_POSITION_TOP_REAR_CENTER: Top rear center
* @GST_AUDIO_CHANNEL_POSITION_BOTTOM_FRONT_CENTER: Bottom front center
* @GST_AUDIO_CHANNEL_POSITION_BOTTOM_FRONT_LEFT: Bottom front left
* @GST_AUDIO_CHANNEL_POSITION_BOTTOM_FRONT_RIGHT: Bottom front right
* @GST_AUDIO_CHANNEL_POSITION_WIDE_LEFT: Wide left (between front left and side left)
* @GST_AUDIO_CHANNEL_POSITION_WIDE_RIGHT: Wide right (between front right and side right)
* @GST_AUDIO_CHANNEL_POSITION_SURROUND_LEFT: Surround left (between rear left and side left)
* @GST_AUDIO_CHANNEL_POSITION_SURROUND_RIGHT: Surround right (between rear right and side right)
* @GST_AUDIO_CHANNEL_POSITION_NONE: used for position-less channels, e.g.
* from a sound card that records 1024 channels; mutually exclusive with
* any other channel position
* @GST_AUDIO_CHANNEL_POSITION_INVALID: invalid position
*
* Audio channel positions.
*
* These are the channels defined in SMPTE 2036-2-2008
* Table 1 for 22.2 audio systems with the Surround and Wide channels from
* DTS Coherent Acoustics (v.1.3.1) and 10.2 and 7.1 layouts. In the caps the
* actual channel layout is expressed with a channel count and a channel mask,
* which describes the existing channels. The positions in the bit mask correspond
* to the enum values.
* For negotiation it is allowed to have more bits set in the channel mask than
* the number of channels to specify the allowed channel positions but this is
* not allowed in negotiated caps. It is not allowed in any situation other
* than the one mentioned below to have less bits set in the channel mask than
* the number of channels.
*
* @GST_AUDIO_CHANNEL_POSITION_MONO can only be used with a single mono channel that
* has no direction information and would be mixed into all directional channels.
* This is expressed in caps by having a single channel and no channel mask.
*
* @GST_AUDIO_CHANNEL_POSITION_NONE can only be used if all channels have this position.
* This is expressed in caps by having a channel mask with no bits set.
*
* As another special case it is allowed to have two channels without a channel mask.
* This implicitely means that this is a stereo stream with a front left and front right
* channel.
*/
typedef enum {
/* These get negative indices to allow to use
* the enum values of the normal cases for the
* bit-mask position */
GST_AUDIO_CHANNEL_POSITION_NONE = -3,
GST_AUDIO_CHANNEL_POSITION_MONO = -2,
GST_AUDIO_CHANNEL_POSITION_INVALID = -1,
/* Normal cases */
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT = 0,
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
GST_AUDIO_CHANNEL_POSITION_LFE1,
GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT,
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER,
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER,
GST_AUDIO_CHANNEL_POSITION_REAR_CENTER,
GST_AUDIO_CHANNEL_POSITION_LFE2,
GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT,
GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT,
GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_LEFT,
GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_RIGHT,
GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_CENTER,
GST_AUDIO_CHANNEL_POSITION_TOP_CENTER,
GST_AUDIO_CHANNEL_POSITION_TOP_REAR_LEFT,
GST_AUDIO_CHANNEL_POSITION_TOP_REAR_RIGHT,
GST_AUDIO_CHANNEL_POSITION_TOP_SIDE_LEFT,
GST_AUDIO_CHANNEL_POSITION_TOP_SIDE_RIGHT,
GST_AUDIO_CHANNEL_POSITION_TOP_REAR_CENTER,
GST_AUDIO_CHANNEL_POSITION_BOTTOM_FRONT_CENTER,
GST_AUDIO_CHANNEL_POSITION_BOTTOM_FRONT_LEFT,
GST_AUDIO_CHANNEL_POSITION_BOTTOM_FRONT_RIGHT,
GST_AUDIO_CHANNEL_POSITION_WIDE_LEFT,
GST_AUDIO_CHANNEL_POSITION_WIDE_RIGHT,
GST_AUDIO_CHANNEL_POSITION_SURROUND_LEFT,
GST_AUDIO_CHANNEL_POSITION_SURROUND_RIGHT
} GstAudioChannelPosition;
#define GST_AUDIO_CHANNEL_POSITION_MASK(pos) (G_GUINT64_CONSTANT(1)<< GST_AUDIO_CHANNEL_POSITION_ ## pos)
audio: GST_EXPORT -> GST_AUDIO_API We need different export decorators for the different libs. For now no actual change though, just rename before the release, and add prelude headers to define the new decorator to GST_EXPORT.
2018-03-13 10:36:56 +00:00
GST_AUDIO_API
audio: split audio header into logical parts
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gboolean gst_audio_buffer_reorder_channels (GstBuffer * buffer,
GstAudioFormat format,
gint channels,
const GstAudioChannelPosition * from,
const GstAudioChannelPosition * to);
audio: GST_EXPORT -> GST_AUDIO_API We need different export decorators for the different libs. For now no actual change though, just rename before the release, and add prelude headers to define the new decorator to GST_EXPORT.
2018-03-13 10:36:56 +00:00
GST_AUDIO_API
audio: split audio header into logical parts
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gboolean gst_audio_reorder_channels (gpointer data, gsize size,
GstAudioFormat format,
gint channels,
const GstAudioChannelPosition * from,
const GstAudioChannelPosition * to);
audio: GST_EXPORT -> GST_AUDIO_API We need different export decorators for the different libs. For now no actual change though, just rename before the release, and add prelude headers to define the new decorator to GST_EXPORT.
2018-03-13 10:36:56 +00:00
GST_AUDIO_API
audio: split audio header into logical parts
2012-06-08 08:10:08 +00:00
gboolean gst_audio_channel_positions_to_valid_order (GstAudioChannelPosition *position,
gint channels);
audio: GST_EXPORT -> GST_AUDIO_API We need different export decorators for the different libs. For now no actual change though, just rename before the release, and add prelude headers to define the new decorator to GST_EXPORT.
2018-03-13 10:36:56 +00:00
GST_AUDIO_API
audio: split audio header into logical parts
2012-06-08 08:10:08 +00:00
gboolean gst_audio_check_valid_channel_positions (const GstAudioChannelPosition *position,
gint channels, gboolean force_order);
audio: GST_EXPORT -> GST_AUDIO_API We need different export decorators for the different libs. For now no actual change though, just rename before the release, and add prelude headers to define the new decorator to GST_EXPORT.
2018-03-13 10:36:56 +00:00
GST_AUDIO_API
audio: split audio header into logical parts
2012-06-08 08:10:08 +00:00
gboolean gst_audio_channel_positions_to_mask (const GstAudioChannelPosition *position,
gint channels, gboolean force_order,
guint64 *channel_mask);
audio: GST_EXPORT -> GST_AUDIO_API We need different export decorators for the different libs. For now no actual change though, just rename before the release, and add prelude headers to define the new decorator to GST_EXPORT.
2018-03-13 10:36:56 +00:00
GST_AUDIO_API
audio: split audio header into logical parts
2012-06-08 08:10:08 +00:00
gboolean gst_audio_channel_positions_from_mask (gint channels, guint64 channel_mask,
GstAudioChannelPosition * position);
audio: GST_EXPORT -> GST_AUDIO_API We need different export decorators for the different libs. For now no actual change though, just rename before the release, and add prelude headers to define the new decorator to GST_EXPORT.
2018-03-13 10:36:56 +00:00
GST_AUDIO_API
audio: split audio header into logical parts
2012-06-08 08:10:08 +00:00
gboolean gst_audio_get_channel_reorder_map (gint channels,
const GstAudioChannelPosition * from,
const GstAudioChannelPosition * to,
gint *reorder_map);
audio: mark symbols explicitly for export with GST_EXPORT
2017-05-15 23:45:41 +00:00
audio: GST_EXPORT -> GST_AUDIO_API We need different export decorators for the different libs. For now no actual change though, just rename before the release, and add prelude headers to define the new decorator to GST_EXPORT.
2018-03-13 10:36:56 +00:00
GST_AUDIO_API
audio-channels: rename get_default_mask Rename _get_default_mask() to _get_fallback_mask() to make it more clear that the function only provides a fallback if nothing else can be done. Also clarify this in the documentation. API: gst_audio_channel_get_fallback_mask()
2015-11-05 11:42:56 +00:00
guint64 gst_audio_channel_get_fallback_mask (gint channels);
audio: split audio header into logical parts
2012-06-08 08:10:08 +00:00
audio: GST_EXPORT -> GST_AUDIO_API We need different export decorators for the different libs. For now no actual change though, just rename before the release, and add prelude headers to define the new decorator to GST_EXPORT.
2018-03-13 10:36:56 +00:00
GST_AUDIO_API
gst-audio: add gst_audio_channel_positions_to_string() We currently don't log much about channel positions making debugging harder as it should be. This is the first step in my attempt to improve this. https://bugzilla.gnome.org/show_bug.cgi?id=763985
2016-03-21 10:46:45 +00:00
gchar* gst_audio_channel_positions_to_string (const GstAudioChannelPosition * position,
gint channels);
audio: split audio header into logical parts
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G_END_DECLS
#endif /* __GST_AUDIO_CHANNELS_H__ */
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