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audio: split audio header into logical parts

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This commit is contained in:
Wim Taymans 2012-06-08 10:10:08 +02:00
parent d7ee6a9c57
commit 3da0b71876
9 changed files with 1818 additions and 1609 deletions
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9
gst-libs/gst/audio/Makefile.am
View file

@ -1,6 +1,9 @@
# variables used for enum/marshal generation
glib_enum_headers= \
audio.h \
audio-format.h \
audio-channels.h \
audio-info.h \
gstaudioringbuffer.h
glib_enum_define = GST_AUDIO
@ -20,6 +23,9 @@ CLEANFILES = $(BUILT_SOURCES)
libgstaudio_@GST_API_VERSION@_la_SOURCES = \
audio.c \
audio-format.c \
audio-channels.c \
audio-info.c \
gstaudioringbuffer.c \
gstaudioclock.c \
gstaudiocdsrc.c \
@ -39,6 +45,9 @@ nodist_libgstaudio_@GST_API_VERSION@_la_SOURCES = $(built_sources) $(built_heade
libgstaudio_@GST_API_VERSION@includedir = $(includedir)/gstreamer-@GST_API_VERSION@/gst/audio
libgstaudio_@GST_API_VERSION@include_HEADERS = \
audio.h \
audio-format.h \
audio-channels.h \
audio-info.h \
gstaudioringbuffer.h \
gstaudioclock.h \
gstaudiofilter.h \

464
gst-libs/gst/audio/audio-channels.c Normal file
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@ -0,0 +1,464 @@
/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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.
*/
/**
* SECTION:gstaudio
* @short_description: Support library for audio elements
*
* This library contains some helper functions for audio elements.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <string.h>
#include "audio-channels.h"
static const GstAudioChannelPosition default_channel_order[64] = {
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
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,
GST_AUDIO_CHANNEL_POSITION_INVALID,
GST_AUDIO_CHANNEL_POSITION_INVALID,
GST_AUDIO_CHANNEL_POSITION_INVALID,
GST_AUDIO_CHANNEL_POSITION_INVALID,
GST_AUDIO_CHANNEL_POSITION_INVALID,
GST_AUDIO_CHANNEL_POSITION_INVALID,
GST_AUDIO_CHANNEL_POSITION_INVALID,
GST_AUDIO_CHANNEL_POSITION_INVALID,
GST_AUDIO_CHANNEL_POSITION_INVALID,
GST_AUDIO_CHANNEL_POSITION_INVALID,
GST_AUDIO_CHANNEL_POSITION_INVALID,
GST_AUDIO_CHANNEL_POSITION_INVALID,
GST_AUDIO_CHANNEL_POSITION_INVALID,
GST_AUDIO_CHANNEL_POSITION_INVALID,
GST_AUDIO_CHANNEL_POSITION_INVALID,
GST_AUDIO_CHANNEL_POSITION_INVALID,
GST_AUDIO_CHANNEL_POSITION_INVALID,
GST_AUDIO_CHANNEL_POSITION_INVALID,
GST_AUDIO_CHANNEL_POSITION_INVALID,
GST_AUDIO_CHANNEL_POSITION_INVALID,
GST_AUDIO_CHANNEL_POSITION_INVALID,
GST_AUDIO_CHANNEL_POSITION_INVALID,
GST_AUDIO_CHANNEL_POSITION_INVALID,
GST_AUDIO_CHANNEL_POSITION_INVALID,
GST_AUDIO_CHANNEL_POSITION_INVALID,
GST_AUDIO_CHANNEL_POSITION_INVALID,
GST_AUDIO_CHANNEL_POSITION_INVALID,
GST_AUDIO_CHANNEL_POSITION_INVALID,
GST_AUDIO_CHANNEL_POSITION_INVALID,
GST_AUDIO_CHANNEL_POSITION_INVALID,
GST_AUDIO_CHANNEL_POSITION_INVALID,
GST_AUDIO_CHANNEL_POSITION_INVALID,
GST_AUDIO_CHANNEL_POSITION_INVALID,
GST_AUDIO_CHANNEL_POSITION_INVALID,
GST_AUDIO_CHANNEL_POSITION_INVALID,
GST_AUDIO_CHANNEL_POSITION_INVALID
};
static gboolean
check_valid_channel_positions (const GstAudioChannelPosition * position,
gint channels, gboolean enforce_order, guint64 * channel_mask_out)
{
gint i, j;
guint64 channel_mask = 0;
if (channels == 1 && position[0] == GST_AUDIO_CHANNEL_POSITION_MONO) {
if (channel_mask_out)
*channel_mask_out = 0;
return TRUE;
}
if (channels > 0 && position[0] == GST_AUDIO_CHANNEL_POSITION_NONE) {
if (channel_mask_out)
*channel_mask_out = 0;
return TRUE;
}
j = 0;
for (i = 0; i < channels; i++) {
while (j < G_N_ELEMENTS (default_channel_order)
&& default_channel_order[j] != position[i])
j++;
if (position[i] == GST_AUDIO_CHANNEL_POSITION_INVALID ||
position[i] == GST_AUDIO_CHANNEL_POSITION_MONO ||
position[i] == GST_AUDIO_CHANNEL_POSITION_NONE)
return FALSE;
/* Is this in valid channel order? */
if (enforce_order && j == G_N_ELEMENTS (default_channel_order))
return FALSE;
j++;
if ((channel_mask & (G_GUINT64_CONSTANT (1) << position[i])))
return FALSE;
channel_mask |= (G_GUINT64_CONSTANT (1) << position[i]);
}
if (channel_mask_out)
*channel_mask_out = channel_mask;
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,
const GstAudioChannelPosition * to)
{
const GstAudioFormatInfo *info;
gint i, j, n;
gint reorder_map[64] = { 0, };
guint8 *ptr;
gint bpf, bps;
guint8 tmp[64 * 8];
info = gst_audio_format_get_info (format);
g_return_val_if_fail (data != NULL, FALSE);
g_return_val_if_fail (from != NULL, FALSE);
g_return_val_if_fail (to != NULL, FALSE);
g_return_val_if_fail (info != NULL && info->width > 0, FALSE);
g_return_val_if_fail (info->width > 0, FALSE);
g_return_val_if_fail (info->width <= 8 * 64, FALSE);
g_return_val_if_fail (size % ((info->width * channels) / 8) == 0, FALSE);
g_return_val_if_fail (channels > 0, FALSE);
g_return_val_if_fail (channels <= 64, FALSE);
if (size == 0)
return TRUE;
if (memcmp (from, to, channels * sizeof (from[0])) == 0)
return TRUE;
if (!gst_audio_get_channel_reorder_map (channels, from, to, reorder_map))
return FALSE;
bps = info->width / 8;
bpf = bps * channels;
ptr = data;
n = size / bpf;
for (i = 0; i < n; i++) {
memcpy (tmp, ptr, bpf);
for (j = 0; j < channels; j++)
memcpy (ptr + reorder_map[j] * bps, tmp + j * bps, bps);
ptr += bpf;
}
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)
{
GstMapInfo info;
gboolean ret;
g_return_val_if_fail (GST_IS_BUFFER (buffer), FALSE);
g_return_val_if_fail (gst_buffer_is_writable (buffer), FALSE);
gst_buffer_map (buffer, &info, GST_MAP_READWRITE);
ret =
gst_audio_reorder_channels (info.data, info.size, format, channels, from,
to);
gst_buffer_unmap (buffer, &info);
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_channel_positions_to_mask:
* @position: The %GstAudioChannelPositions
* @channels: The number of channels.
* @force_order: Only consider the GStreamer channel order.
* @channel_mask: the output channel mask
*
* Convert the @position array of @channels channels to a bitmask.
*
* 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 and could be converted.
*/
gboolean
gst_audio_channel_positions_to_mask (const GstAudioChannelPosition * position,
gint channels, gboolean force_order, guint64 * channel_mask)
{
return check_valid_channel_positions (position, channels, force_order,
channel_mask);
}
/**
* gst_audio_channel_positions_from_mask:
* @channels: The number of channels
* @channel_mask: The input channel_mask
* @position: The %GstAudioChannelPositions
* @caps: a #GstCaps
*
* Convert the @channels present in @channel_mask to a @position array
* (which should have at least @channels entries ensured by caller).
* If @channel_mask is set to 0, it is considered as 'not present' for purpose
* of conversion.
*
* Returns: %TRUE if channel and channel mask are valid and could be converted
*/
gboolean
gst_audio_channel_positions_from_mask (gint channels, guint64 channel_mask,
GstAudioChannelPosition * position)
{
g_return_val_if_fail (position != NULL, FALSE);
g_return_val_if_fail (channels != 0, FALSE);
GST_DEBUG ("converting %d channels for "
" channel mask 0x%016" G_GINT64_MODIFIER "x", channels, channel_mask);
if (!channel_mask) {
if (channels == 1) {
position[0] = GST_AUDIO_CHANNEL_POSITION_MONO;
} else if (channels == 2) {
position[0] = GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT;
position[1] = GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT;
} else {
goto no_channel_mask;
}
} else {
gint i, j;
j = 0;
for (i = 0; i < 64; i++) {
if ((channel_mask & (G_GUINT64_CONSTANT (1) << i))) {
if (j < channels)
position[j] = default_channel_order[i];
if (default_channel_order[i] == GST_AUDIO_CHANNEL_POSITION_INVALID)
goto invalid_channel_mask;
j++;
}
}
if (j != channels)
goto invalid_channel_mask;
}
return TRUE;
/* ERROR */
no_channel_mask:
{
GST_ERROR ("no channel-mask property given");
return FALSE;
}
invalid_channel_mask:
{
GST_ERROR ("Invalid channel mask 0x%016" G_GINT64_MODIFIER
"x for %d channels", channel_mask, channels);
return FALSE;
}
}
/**
* 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;
}
/**
* 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;
}

166
gst-libs/gst/audio/audio-channels.h Normal file
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@ -0,0 +1,166 @@
/* 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
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __GST_AUDIO_CHANNELS_H__
#define __GST_AUDIO_CHANNELS_H__
#include <gst/gst.h>
#include <gst/audio/audio-format.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)
gboolean gst_audio_buffer_reorder_channels (GstBuffer * buffer,
GstAudioFormat format,
gint channels,
const GstAudioChannelPosition * from,
const GstAudioChannelPosition * to);
gboolean gst_audio_reorder_channels (gpointer data, gsize size,
GstAudioFormat format,
gint channels,
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);
gboolean gst_audio_channel_positions_to_mask (const GstAudioChannelPosition *position,
gint channels, gboolean force_order,
guint64 *channel_mask);
gboolean gst_audio_channel_positions_from_mask (gint channels, guint64 channel_mask,
GstAudioChannelPosition * position);
gboolean gst_audio_get_channel_reorder_map (gint channels,
const GstAudioChannelPosition * from,
const GstAudioChannelPosition * to,
gint *reorder_map);
G_END_DECLS
#endif /* __GST_AUDIO_CHANNELS_H__ */

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/* GStreamer
* Copyright (C) <2012> 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
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <string.h>
#include "audio-format.h"
#define SINT (GST_AUDIO_FORMAT_FLAG_INTEGER | GST_AUDIO_FORMAT_FLAG_SIGNED)
#define UINT (GST_AUDIO_FORMAT_FLAG_INTEGER)
#define MAKE_FORMAT(str,desc,flags,end,width,depth,silent) \
{ GST_AUDIO_FORMAT_ ##str, G_STRINGIFY(str), desc, flags, end, width, depth, silent }
#define SILENT_0 { 0, 0, 0, 0, 0, 0, 0, 0 }
#define SILENT_U8 { 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80 }
#define SILENT_U16LE { 0x00, 0x80, 0x00, 0x80, 0x00, 0x80, 0x00, 0x80 }
#define SILENT_U16BE { 0x80, 0x00, 0x80, 0x00, 0x80, 0x00, 0x80, 0x00 }
#define SILENT_U24_32LE { 0x00, 0x00, 0x80, 0x00, 0x00, 0x00, 0x80, 0x00 }
#define SILENT_U24_32BE { 0x00, 0x80, 0x00, 0x00, 0x00, 0x80, 0x00, 0x00 }
#define SILENT_U32LE { 0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00, 0x80 }
#define SILENT_U32BE { 0x80, 0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00 }
#define SILENT_U24LE { 0x00, 0x00, 0x80, 0x00, 0x00, 0x80 }
#define SILENT_U24BE { 0x80, 0x00, 0x00, 0x80, 0x00, 0x00 }
#define SILENT_U20LE { 0x00, 0x00, 0x08, 0x00, 0x00, 0x08 }
#define SILENT_U20BE { 0x08, 0x00, 0x00, 0x08, 0x00, 0x00 }
#define SILENT_U18LE { 0x00, 0x00, 0x02, 0x00, 0x00, 0x02 }
#define SILENT_U18BE { 0x02, 0x00, 0x00, 0x02, 0x00, 0x00 }
static GstAudioFormatInfo formats[] = {
{GST_AUDIO_FORMAT_UNKNOWN, "UNKNOWN", "Unknown audio", 0, 0, 0, 0},
{GST_AUDIO_FORMAT_ENCODED, "ENCODED", "Encoded audio",
GST_AUDIO_FORMAT_FLAG_COMPLEX, 0, 0, 0},
/* 8 bit */
MAKE_FORMAT (S8, "8-bit signed PCM audio", SINT, 0, 8, 8, SILENT_0),
MAKE_FORMAT (U8, "8-bit unsigned PCM audio", UINT, 0, 8, 8, SILENT_U8),
/* 16 bit */
MAKE_FORMAT (S16LE, "16-bit signed PCM audio", SINT, G_LITTLE_ENDIAN, 16, 16,
SILENT_0),
MAKE_FORMAT (S16BE, "16-bit signed PCM audio", SINT, G_BIG_ENDIAN, 16, 16,
SILENT_0),
MAKE_FORMAT (U16LE, "16-bit unsigned PCM audio", UINT, G_LITTLE_ENDIAN, 16,
16, SILENT_U16LE),
MAKE_FORMAT (U16BE, "16-bit unsigned PCM audio", UINT, G_BIG_ENDIAN, 16, 16,
SILENT_U16BE),
/* 24 bit in low 3 bytes of 32 bits */
MAKE_FORMAT (S24_32LE, "24-bit signed PCM audio", SINT, G_LITTLE_ENDIAN, 32,
24, SILENT_0),
MAKE_FORMAT (S24_32BE, "24-bit signed PCM audio", SINT, G_BIG_ENDIAN, 32, 24,
SILENT_0),
MAKE_FORMAT (U24_32LE, "24-bit unsigned PCM audio", UINT, G_LITTLE_ENDIAN, 32,
24, SILENT_U24_32LE),
MAKE_FORMAT (U24_32BE, "24-bit unsigned PCM audio", UINT, G_BIG_ENDIAN, 32,
24, SILENT_U24_32BE),
/* 32 bit */
MAKE_FORMAT (S32LE, "32-bit signed PCM audio", SINT, G_LITTLE_ENDIAN, 32, 32,
SILENT_0),
MAKE_FORMAT (S32BE, "32-bit signed PCM audio", SINT, G_BIG_ENDIAN, 32, 32,
SILENT_0),
MAKE_FORMAT (U32LE, "32-bit unsigned PCM audio", UINT, G_LITTLE_ENDIAN, 32,
32, SILENT_U32LE),
MAKE_FORMAT (U32BE, "32-bit unsigned PCM audio", UINT, G_BIG_ENDIAN, 32, 32,
SILENT_U32BE),
/* 24 bit in 3 bytes */
MAKE_FORMAT (S24LE, "24-bit signed PCM audio", SINT, G_LITTLE_ENDIAN, 24, 24,
SILENT_0),
MAKE_FORMAT (S24BE, "24-bit signed PCM audio", SINT, G_BIG_ENDIAN, 24, 24,
SILENT_0),
MAKE_FORMAT (U24LE, "24-bit unsigned PCM audio", UINT, G_LITTLE_ENDIAN, 24,
24, SILENT_U24LE),
MAKE_FORMAT (U24BE, "24-bit unsigned PCM audio", UINT, G_BIG_ENDIAN, 24, 24,
SILENT_U24BE),
/* 20 bit in 3 bytes */
MAKE_FORMAT (S20LE, "20-bit signed PCM audio", SINT, G_LITTLE_ENDIAN, 24, 20,
SILENT_0),
MAKE_FORMAT (S20BE, "20-bit signed PCM audio", SINT, G_BIG_ENDIAN, 24, 20,
SILENT_0),
MAKE_FORMAT (U20LE, "20-bit unsigned PCM audio", UINT, G_LITTLE_ENDIAN, 24,
20, SILENT_U20LE),
MAKE_FORMAT (U20BE, "20-bit unsigned PCM audio", UINT, G_BIG_ENDIAN, 24, 20,
SILENT_U20BE),
/* 18 bit in 3 bytes */
MAKE_FORMAT (S18LE, "18-bit signed PCM audio", SINT, G_LITTLE_ENDIAN, 24, 18,
SILENT_0),
MAKE_FORMAT (S18BE, "18-bit signed PCM audio", SINT, G_BIG_ENDIAN, 24, 18,
SILENT_0),
MAKE_FORMAT (U18LE, "18-bit unsigned PCM audio", UINT, G_LITTLE_ENDIAN, 24,
18, SILENT_U18LE),
MAKE_FORMAT (U18BE, "18-bit unsigned PCM audio", UINT, G_BIG_ENDIAN, 24, 18,
SILENT_U18BE),
/* float */
MAKE_FORMAT (F32LE, "32-bit floating-point audio",
GST_AUDIO_FORMAT_FLAG_FLOAT, G_LITTLE_ENDIAN, 32, 32,
SILENT_0),
MAKE_FORMAT (F32BE, "32-bit floating-point audio",
GST_AUDIO_FORMAT_FLAG_FLOAT, G_BIG_ENDIAN, 32, 32,
SILENT_0),
MAKE_FORMAT (F64LE, "64-bit floating-point audio",
GST_AUDIO_FORMAT_FLAG_FLOAT, G_LITTLE_ENDIAN, 64, 64,
SILENT_0),
MAKE_FORMAT (F64BE, "64-bit floating-point audio",
GST_AUDIO_FORMAT_FLAG_FLOAT, G_BIG_ENDIAN, 64, 64,
SILENT_0)
};
G_DEFINE_POINTER_TYPE (GstAudioFormatInfo, gst_audio_format_info);
/**
* gst_audio_format_build_integer:
* @sign: signed or unsigned format
* @endianness: G_LITTLE_ENDIAN or G_BIG_ENDIAN
* @width: amount of bits used per sample
* @depth: amount of used bits in @width
*
* Construct a #GstAudioFormat with given parameters.
*
* Returns: a #GstAudioFormat or GST_AUDIO_FORMAT_UNKNOWN when no audio format
* exists with the given parameters.
*/
GstAudioFormat
gst_audio_format_build_integer (gboolean sign, gint endianness,
gint width, gint depth)
{
gint i, e;
for (i = 0; i < G_N_ELEMENTS (formats); i++) {
GstAudioFormatInfo *finfo = &formats[i];
/* must be int */
if (!GST_AUDIO_FORMAT_INFO_IS_INTEGER (finfo))
continue;
/* width and depth must match */
if (width != GST_AUDIO_FORMAT_INFO_WIDTH (finfo))
continue;
if (depth != GST_AUDIO_FORMAT_INFO_DEPTH (finfo))
continue;
/* if there is endianness, it must match */
e = GST_AUDIO_FORMAT_INFO_ENDIANNESS (finfo);
if (e && e != endianness)
continue;
/* check sign */
if ((sign && !GST_AUDIO_FORMAT_INFO_IS_SIGNED (finfo)) ||
(!sign && GST_AUDIO_FORMAT_INFO_IS_SIGNED (finfo)))
continue;
return GST_AUDIO_FORMAT_INFO_FORMAT (finfo);
}
return GST_AUDIO_FORMAT_UNKNOWN;
}
/**
* gst_audio_format_from_string:
* @format: a format string
*
* Convert the @format string to its #GstAudioFormat.
*
* Returns: the #GstAudioFormat for @format or GST_AUDIO_FORMAT_UNKNOWN when the
* string is not a known format.
*/
GstAudioFormat
gst_audio_format_from_string (const gchar * format)
{
guint i;
for (i = 0; i < G_N_ELEMENTS (formats); i++) {
if (strcmp (GST_AUDIO_FORMAT_INFO_NAME (&formats[i]), format) == 0)
return GST_AUDIO_FORMAT_INFO_FORMAT (&formats[i]);
}
return GST_AUDIO_FORMAT_UNKNOWN;
}
const gchar *
gst_audio_format_to_string (GstAudioFormat format)
{
g_return_val_if_fail (format != GST_AUDIO_FORMAT_UNKNOWN, NULL);
if (format >= G_N_ELEMENTS (formats))
return NULL;
return GST_AUDIO_FORMAT_INFO_NAME (&formats[format]);
}
/**
* gst_audio_format_get_info:
* @format: a #GstAudioFormat
*
* Get the #GstAudioFormatInfo for @format
*
* Returns: The #GstAudioFormatInfo for @format.
*/
const GstAudioFormatInfo *
gst_audio_format_get_info (GstAudioFormat format)
{
g_return_val_if_fail (format < G_N_ELEMENTS (formats), NULL);
return &formats[format];
}
/**
* gst_audio_format_fill_silence:
* @info: a #GstAudioFormatInfo
* @dest: a destination to fill
* @length: the length to fill
*
* Fill @length bytes in @dest with silence samples for @info.
*/
void
gst_audio_format_fill_silence (const GstAudioFormatInfo * info,
gpointer dest, gsize length)
{
guint8 *dptr = dest;
g_return_if_fail (info != NULL);
g_return_if_fail (dest != NULL);
if (info->flags & GST_AUDIO_FORMAT_FLAG_FLOAT ||
info->flags & GST_AUDIO_FORMAT_FLAG_SIGNED) {
/* float or signed always 0 */
memset (dest, 0, length);
} else {
gint i, j, bps = info->width >> 3;
switch (bps) {
case 1:
memset (dest, info->silence[0], length);
break;
default:
for (i = 0; i < length; i += bps) {
for (j = 0; j < bps; j++)
*dptr++ = info->silence[j];
}
break;
}
}
}

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/* 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
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <gst/gst.h>
#ifndef __GST_AUDIO_FORMAT_H__
#define __GST_AUDIO_FORMAT_H__
G_BEGIN_DECLS
#include <gst/audio/audio-enumtypes.h>
#if G_BYTE_ORDER == G_BIG_ENDIAN
#define _GST_AUDIO_FORMAT_NE(fmt) GST_AUDIO_FORMAT_ ## fmt ## BE
#elif G_BYTE_ORDER == G_LITTLE_ENDIAN
#define _GST_AUDIO_FORMAT_NE(fmt) GST_AUDIO_FORMAT_ ## fmt ## LE
#endif
/**
* GstAudioFormat:
* @GST_AUDIO_FORMAT_UNKNOWN: unknown or unset audio format
* @GST_AUDIO_FORMAT_ENCODED: encoded audio format
* @GST_AUDIO_FORMAT_S8: 8 bits in 8 bits, signed
* @GST_AUDIO_FORMAT_U8: 8 bits in 8 bits, unsigned
* @GST_AUDIO_FORMAT_S16LE: 16 bits in 16 bits, signed, little endian
* @GST_AUDIO_FORMAT_S16BE: 16 bits in 16 bits, signed, big endian
* @GST_AUDIO_FORMAT_U16LE: 16 bits in 16 bits, unsigned, little endian
* @GST_AUDIO_FORMAT_U16BE: 16 bits in 16 bits, unsigned, big endian
* @GST_AUDIO_FORMAT_S24_32LE: 24 bits in 32 bits, signed, little endian
* @GST_AUDIO_FORMAT_S24_32BE: 24 bits in 32 bits, signed, big endian
* @GST_AUDIO_FORMAT_U24_32LE: 24 bits in 32 bits, unsigned, little endian
* @GST_AUDIO_FORMAT_U24_32BE: 24 bits in 32 bits, unsigned, big endian
* @GST_AUDIO_FORMAT_S32LE: 32 bits in 32 bits, signed, little endian
* @GST_AUDIO_FORMAT_S32BE: 32 bits in 32 bits, signed, big endian
* @GST_AUDIO_FORMAT_U32LE: 32 bits in 32 bits, unsigned, little endian
* @GST_AUDIO_FORMAT_U32BE: 32 bits in 32 bits, unsigned, big endian
* @GST_AUDIO_FORMAT_S24LE: 24 bits in 24 bits, signed, little endian
* @GST_AUDIO_FORMAT_S24BE: 24 bits in 24 bits, signed, big endian
* @GST_AUDIO_FORMAT_U24LE: 24 bits in 24 bits, unsigned, little endian
* @GST_AUDIO_FORMAT_U24BE: 24 bits in 24 bits, unsigned, big endian
* @GST_AUDIO_FORMAT_S20LE: 20 bits in 24 bits, signed, little endian
* @GST_AUDIO_FORMAT_S20BE: 20 bits in 24 bits, signed, big endian
* @GST_AUDIO_FORMAT_U20LE: 20 bits in 24 bits, unsigned, little endian
* @GST_AUDIO_FORMAT_U20BE: 20 bits in 24 bits, unsigned, big endian
* @GST_AUDIO_FORMAT_S18LE: 18 bits in 24 bits, signed, little endian
* @GST_AUDIO_FORMAT_S18BE: 18 bits in 24 bits, signed, big endian
* @GST_AUDIO_FORMAT_U18LE: 18 bits in 24 bits, unsigned, little endian
* @GST_AUDIO_FORMAT_U18BE: 18 bits in 24 bits, unsigned, big endian
* @GST_AUDIO_FORMAT_F32LE: 32-bit floating point samples, little endian
* @GST_AUDIO_FORMAT_F32BE: 32-bit floating point samples, big endian
* @GST_AUDIO_FORMAT_F64LE: 64-bit floating point samples, little endian
* @GST_AUDIO_FORMAT_F64BE: 64-bit floating point samples, big endian
* @GST_AUDIO_FORMAT_S16: 16 bits in 16 bits, signed, native endianness
* @GST_AUDIO_FORMAT_U16: 16 bits in 16 bits, unsigned, native endianness
* @GST_AUDIO_FORMAT_S24_32: 24 bits in 32 bits, signed, native endianness
* @GST_AUDIO_FORMAT_U24_32: 24 bits in 32 bits, unsigned, native endianness
* @GST_AUDIO_FORMAT_S32: 32 bits in 32 bits, signed, native endianness
* @GST_AUDIO_FORMAT_U32: 32 bits in 32 bits, unsigned, native endianness
* @GST_AUDIO_FORMAT_S24: 24 bits in 24 bits, signed, native endianness
* @GST_AUDIO_FORMAT_U24: 24 bits in 24 bits, unsigned, native endianness
* @GST_AUDIO_FORMAT_S20: 20 bits in 24 bits, signed, native endianness
* @GST_AUDIO_FORMAT_U20: 20 bits in 24 bits, unsigned, native endianness
* @GST_AUDIO_FORMAT_S18: 18 bits in 24 bits, signed, native endianness
* @GST_AUDIO_FORMAT_U18: 18 bits in 24 bits, unsigned, native endianness
* @GST_AUDIO_FORMAT_F32: 32-bit floating point samples, native endianness
* @GST_AUDIO_FORMAT_F64: 64-bit floating point samples, native endianness
*
* Enum value describing the most common audio formats.
*/
typedef enum {
GST_AUDIO_FORMAT_UNKNOWN,
GST_AUDIO_FORMAT_ENCODED,
/* 8 bit */
GST_AUDIO_FORMAT_S8,
GST_AUDIO_FORMAT_U8,
/* 16 bit */
GST_AUDIO_FORMAT_S16LE,
GST_AUDIO_FORMAT_S16BE,
GST_AUDIO_FORMAT_U16LE,
GST_AUDIO_FORMAT_U16BE,
/* 24 bit in low 3 bytes of 32 bits*/
GST_AUDIO_FORMAT_S24_32LE,
GST_AUDIO_FORMAT_S24_32BE,
GST_AUDIO_FORMAT_U24_32LE,
GST_AUDIO_FORMAT_U24_32BE,
/* 32 bit */
GST_AUDIO_FORMAT_S32LE,
GST_AUDIO_FORMAT_S32BE,
GST_AUDIO_FORMAT_U32LE,
GST_AUDIO_FORMAT_U32BE,
/* 24 bit in 3 bytes*/
GST_AUDIO_FORMAT_S24LE,
GST_AUDIO_FORMAT_S24BE,
GST_AUDIO_FORMAT_U24LE,
GST_AUDIO_FORMAT_U24BE,
/* 20 bit in 3 bytes*/
GST_AUDIO_FORMAT_S20LE,
GST_AUDIO_FORMAT_S20BE,
GST_AUDIO_FORMAT_U20LE,
GST_AUDIO_FORMAT_U20BE,
/* 18 bit in 3 bytes*/
GST_AUDIO_FORMAT_S18LE,
GST_AUDIO_FORMAT_S18BE,
GST_AUDIO_FORMAT_U18LE,
GST_AUDIO_FORMAT_U18BE,
/* float */
GST_AUDIO_FORMAT_F32LE,
GST_AUDIO_FORMAT_F32BE,
GST_AUDIO_FORMAT_F64LE,
GST_AUDIO_FORMAT_F64BE,
/* native endianness equivalents */
GST_AUDIO_FORMAT_S16 = _GST_AUDIO_FORMAT_NE(S16),
GST_AUDIO_FORMAT_U16 = _GST_AUDIO_FORMAT_NE(U16),
GST_AUDIO_FORMAT_S24_32 = _GST_AUDIO_FORMAT_NE(S24_32),
GST_AUDIO_FORMAT_U24_32 = _GST_AUDIO_FORMAT_NE(U24_32),
GST_AUDIO_FORMAT_S32 = _GST_AUDIO_FORMAT_NE(S32),
GST_AUDIO_FORMAT_U32 = _GST_AUDIO_FORMAT_NE(U32),
GST_AUDIO_FORMAT_S24 = _GST_AUDIO_FORMAT_NE(S24),
GST_AUDIO_FORMAT_U24 = _GST_AUDIO_FORMAT_NE(U24),
GST_AUDIO_FORMAT_S20 = _GST_AUDIO_FORMAT_NE(S20),
GST_AUDIO_FORMAT_U20 = _GST_AUDIO_FORMAT_NE(U20),
GST_AUDIO_FORMAT_S18 = _GST_AUDIO_FORMAT_NE(S18),
GST_AUDIO_FORMAT_U18 = _GST_AUDIO_FORMAT_NE(U18),
GST_AUDIO_FORMAT_F32 = _GST_AUDIO_FORMAT_NE(F32),
GST_AUDIO_FORMAT_F64 = _GST_AUDIO_FORMAT_NE(F64)
} GstAudioFormat;
typedef struct _GstAudioFormatInfo GstAudioFormatInfo;
/**
* GstAudioFormatFlags:
* @GST_AUDIO_FORMAT_FLAG_INTEGER: integer samples
* @GST_AUDIO_FORMAT_FLAG_FLOAT: float samples
* @GST_AUDIO_FORMAT_FLAG_SIGNED: signed samples
* @GST_AUDIO_FORMAT_FLAG_COMPLEX: complex layout
*
* The different audio flags that a format info can have.
*/
typedef enum
{
GST_AUDIO_FORMAT_FLAG_INTEGER = (1 << 0),
GST_AUDIO_FORMAT_FLAG_FLOAT = (1 << 1),
GST_AUDIO_FORMAT_FLAG_SIGNED = (1 << 2),
GST_AUDIO_FORMAT_FLAG_COMPLEX = (1 << 4)
} GstAudioFormatFlags;
/**
* GstAudioPackFlags:
* @GST_AUDIO_PACK_FLAG_NONE: No flag
*
* The different flags that can be used when packing and unpacking.
*/
typedef enum
{
GST_AUDIO_PACK_FLAG_NONE = 0
} GstAudioPackFlags;
/**
* GstAudioFormatUnpack:
* @info: a #GstAudioFormatInfo
* @dest: a destination array
* @data: pointer to the audio data
* @length: the amount of samples to unpack.
*
* Unpacks @length samples from the given data of format @info.
* The samples will be unpacked into @dest which each channel
* interleaved. @dest should at least be big enough to hold @length *
* channels * size(unpack_format) bytes.
*/
typedef void (*GstAudioFormatUnpack) (const GstAudioFormatInfo *info,
GstAudioPackFlags flags, gpointer dest,
const gpointer data, gint length);
/**
* GstAudioFormatPack:
* @info: a #GstAudioFormatInfo
* @src: a source array
* @data: pointer to the destination data
* @length: the amount of samples to pack.
*
* Packs @length samples from @src to the data array in format @info.
* The samples from source have each channel interleaved
* and will be packed into @data.
*/
typedef void (*GstAudioFormatPack) (const GstAudioFormatInfo *info,
GstAudioPackFlags flags, const gpointer src,
gpointer data, gint length);
/**
* GstAudioFormatInfo:
* @format: #GstAudioFormat
* @name: string representation of the format
* @description: user readable description of the format
* @flags: #GstAudioFormatFlags
* @endianness: the endianness
* @width: amount of bits used for one sample
* @depth: amount of valid bits in @width
* @silence: @width/8 bytes with 1 silent sample
* @unpack_format: the format of the unpacked samples
* @unpack_func: function to unpack samples
* @pack_func: function to pack samples
*
* Information for an audio format.
*/
struct _GstAudioFormatInfo {
GstAudioFormat format;
const gchar *name;
const gchar *description;
GstAudioFormatFlags flags;
gint endianness;
gint width;
gint depth;
guint8 silence[8];
GstAudioFormat unpack_format;
GstAudioFormatUnpack unpack_func;
GstAudioFormatPack pack_func;
/*< private >*/
gpointer _gst_reserved[GST_PADDING];
};
GType gst_audio_format_info_get_type (void);
#define GST_AUDIO_FORMAT_INFO_FORMAT(info) ((info)->format)
#define GST_AUDIO_FORMAT_INFO_NAME(info) ((info)->name)
#define GST_AUDIO_FORMAT_INFO_FLAGS(info) ((info)->flags)
#define GST_AUDIO_FORMAT_INFO_IS_INTEGER(info) !!((info)->flags & GST_AUDIO_FORMAT_FLAG_INTEGER)
#define GST_AUDIO_FORMAT_INFO_IS_FLOAT(info) !!((info)->flags & GST_AUDIO_FORMAT_FLAG_FLOAT)
#define GST_AUDIO_FORMAT_INFO_IS_SIGNED(info) !!((info)->flags & GST_AUDIO_FORMAT_FLAG_SIGNED)
#define GST_AUDIO_FORMAT_INFO_ENDIANNESS(info) ((info)->endianness)
#define GST_AUDIO_FORMAT_INFO_IS_LITTLE_ENDIAN(info) ((info)->endianness == G_LITTLE_ENDIAN)
#define GST_AUDIO_FORMAT_INFO_IS_BIG_ENDIAN(info) ((info)->endianness == G_BIG_ENDIAN)
#define GST_AUDIO_FORMAT_INFO_WIDTH(info) ((info)->width)
#define GST_AUDIO_FORMAT_INFO_DEPTH(info) ((info)->depth)
GstAudioFormat gst_audio_format_build_integer (gboolean sign, gint endianness,
gint width, gint depth) G_GNUC_CONST;
GstAudioFormat gst_audio_format_from_string (const gchar *format) G_GNUC_CONST;
const gchar * gst_audio_format_to_string (GstAudioFormat format) G_GNUC_CONST;
const GstAudioFormatInfo *
gst_audio_format_get_info (GstAudioFormat format) G_GNUC_CONST;
void gst_audio_format_fill_silence (const GstAudioFormatInfo *info,
gpointer dest, gsize length);
#define GST_AUDIO_RATE_RANGE "(int) [ 1, max ]"
#define GST_AUDIO_CHANNELS_RANGE "(int) [ 1, max ]"
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
# define GST_AUDIO_NE(s) G_STRINGIFY(s)"LE"
# define GST_AUDIO_OE(s) G_STRINGIFY(s)"BE"
#else
# define GST_AUDIO_NE(s) G_STRINGIFY(s)"BE"
# define GST_AUDIO_OE(s) G_STRINGIFY(s)"LE"
#endif
#define GST_AUDIO_FORMATS_ALL " { S8, U8, " \
"S16LE, S16BE, U16LE, U16BE, " \
"S24_32LE, S24_32BE, U24_32LE, U24_32BE, " \
"S32LE, S32BE, U32LE, U32BE, " \
"S24LE, S24BE, U24LE, U24BE, " \
"S20LE, S20BE, U20LE, U20BE, " \
"S18LE, S18BE, U18LE, U18BE, " \
"F32LE, F32BE, F64LE, F64BE }"
/**
* GST_AUDIO_CAPS_MAKE:
* @format: string format that describes the sample layout, as string
* (e.g. "S16LE", "S8", etc.)
*
* Generic caps string for audio, for use in pad templates.
*/
#define GST_AUDIO_CAPS_MAKE(format) \
"audio/x-raw, " \
"format = (string) " format ", " \
"rate = " GST_AUDIO_RATE_RANGE ", " \
"channels = " GST_AUDIO_CHANNELS_RANGE
/**
* GST_AUDIO_DEF_RATE:
*
* Standard sampling rate used in consumer audio.
*/
#define GST_AUDIO_DEF_RATE 44100
/**
* GST_AUDIO_DEF_CHANNELS:
*
* Standard number of channels used in consumer audio.
*/
#define GST_AUDIO_DEF_CHANNELS 2
/**
* GST_AUDIO_DEF_FORMAT:
*
* Standard format used in consumer audio.
*/
#define GST_AUDIO_DEF_FORMAT "S16LE"
G_END_DECLS
#endif /* __GST_AUDIO_FORMAT_H__ */

460
gst-libs/gst/audio/audio-info.c Normal file
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@ -0,0 +1,460 @@
/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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.
*/
/**
* SECTION:gstaudio
* @short_description: Support library for audio elements
*
* This library contains some helper functions for audio elements.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <string.h>
#include "audio.h"
#include <gst/gststructure.h>
/**
* gst_audio_info_copy:
* @info: a #GstAudioInfo
*
* Copy a GstAudioInfo structure.
*
* Returns: a new #GstAudioInfo. free with gst_audio_info_free.
*/
GstAudioInfo *
gst_audio_info_copy (const GstAudioInfo * info)
{
return g_slice_dup (GstAudioInfo, info);
}
/**
* gst_audio_info_free:
* @info: a #GstAudioInfo
*
* Free a GstAudioInfo structure previously allocated with gst_audio_info_new()
* or gst_audio_info_copy().
*/
void
gst_audio_info_free (GstAudioInfo * info)
{
g_slice_free (GstAudioInfo, info);
}
G_DEFINE_BOXED_TYPE (GstAudioInfo, gst_audio_info,
(GBoxedCopyFunc) gst_audio_info_copy, (GBoxedFreeFunc) gst_audio_info_free);
/**
* gst_audio_info_new:
*
* Allocate a new #GstAudioInfo that is also initialized with
* gst_audio_info_init().
*
* Returns: a new #GstAudioInfo. free with gst_audio_info_free().
*/
GstAudioInfo *
gst_audio_info_new (void)
{
GstAudioInfo *info;
info = g_slice_new (GstAudioInfo);
gst_audio_info_init (info);
return info;
}
/**
* gst_audio_info_init:
* @info: a #GstAudioInfo
*
* Initialize @info with default values.
*/
void
gst_audio_info_init (GstAudioInfo * info)
{
g_return_if_fail (info != NULL);
memset (info, 0, sizeof (GstAudioInfo));
info->finfo = gst_audio_format_get_info (GST_AUDIO_FORMAT_UNKNOWN);
memset (&info->position, 0xff, sizeof (info->position));
}
/**
* gst_audio_info_set_format:
* @info: a #GstAudioInfo
* @format: the format
* @rate: the samplerate
* @channels: the number of channels
* @position: the channel positions
*
* Set the default info for the audio info of @format and @rate and @channels.
*/
void
gst_audio_info_set_format (GstAudioInfo * info, GstAudioFormat format,
gint rate, gint channels, const GstAudioChannelPosition * position)
{
const GstAudioFormatInfo *finfo;
gint i;
g_return_if_fail (info != NULL);
g_return_if_fail (format != GST_AUDIO_FORMAT_UNKNOWN);
finfo = gst_audio_format_get_info (format);
info->flags = 0;
info->layout = GST_AUDIO_LAYOUT_INTERLEAVED;
info->finfo = finfo;
info->rate = rate;
info->channels = channels;
info->bpf = (finfo->width * channels) / 8;
memset (&info->position, 0xff, sizeof (info->position));
if (!position && channels == 1) {
info->position[0] = GST_AUDIO_CHANNEL_POSITION_MONO;
return;
} else if (!position && channels == 2) {
info->position[0] = GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT;
info->position[1] = GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT;
return;
} else {
if (!position
|| !gst_audio_check_valid_channel_positions (position, channels,
TRUE)) {
if (position)
g_warning ("Invalid channel positions");
} else {
memcpy (&info->position, position,
info->channels * sizeof (info->position[0]));
if (info->position[0] == GST_AUDIO_CHANNEL_POSITION_NONE)
info->flags |= GST_AUDIO_FLAG_UNPOSITIONED;
return;
}
}
/* Otherwise a NONE layout */
info->flags |= GST_AUDIO_FLAG_UNPOSITIONED;
for (i = 0; i < MIN (64, channels); i++)
info->position[i] = GST_AUDIO_CHANNEL_POSITION_NONE;
}
/**
* gst_audio_info_from_caps:
* @info: a #GstAudioInfo
* @caps: a #GstCaps
*
* Parse @caps and update @info.
*
* Returns: TRUE if @caps could be parsed
*/
gboolean
gst_audio_info_from_caps (GstAudioInfo * info, const GstCaps * caps)
{
GstStructure *str;
const gchar *s;
GstAudioFormat format;
gint rate, channels;
guint64 channel_mask;
gint i;
GstAudioChannelPosition position[64];
g_return_val_if_fail (info != NULL, FALSE);
g_return_val_if_fail (caps != NULL, FALSE);
g_return_val_if_fail (gst_caps_is_fixed (caps), FALSE);
GST_DEBUG ("parsing caps %" GST_PTR_FORMAT, caps);
info->flags = 0;
str = gst_caps_get_structure (caps, 0);
if (!gst_structure_has_name (str, "audio/x-raw"))
goto wrong_name;
if (!(s = gst_structure_get_string (str, "format")))
goto no_format;
format = gst_audio_format_from_string (s);
if (format == GST_AUDIO_FORMAT_UNKNOWN)
goto unknown_format;
if (!(s = gst_structure_get_string (str, "layout")))
goto no_layout;
if (g_str_equal (s, "interleaved"))
info->layout = GST_AUDIO_LAYOUT_INTERLEAVED;
else if (g_str_equal (s, "non-interleaved"))
info->layout = GST_AUDIO_LAYOUT_NON_INTERLEAVED;
else
goto unknown_layout;
if (!gst_structure_get_int (str, "rate", &rate))
goto no_rate;
if (!gst_structure_get_int (str, "channels", &channels))
goto no_channels;
if (!gst_structure_get (str, "channel-mask", GST_TYPE_BITMASK, &channel_mask,
NULL)) {
if (channels == 1) {
position[0] = GST_AUDIO_CHANNEL_POSITION_MONO;
} else if (channels == 2) {
position[0] = GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT;
position[1] = GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT;
} else {
goto no_channel_mask;
}
} else if (channel_mask == 0) {
info->flags |= GST_AUDIO_FLAG_UNPOSITIONED;
for (i = 0; i < MIN (64, channels); i++)
position[i] = GST_AUDIO_CHANNEL_POSITION_NONE;
} else {
if (!gst_audio_channel_positions_from_mask (channels, channel_mask,
position))
goto invalid_channel_mask;
}
gst_audio_info_set_format (info, format, rate, channels, position);
return TRUE;
/* ERROR */
wrong_name:
{
GST_ERROR ("wrong name, expected audio/x-raw");
return FALSE;
}
no_format:
{
GST_ERROR ("no format given");
return FALSE;
}
unknown_format:
{
GST_ERROR ("unknown format given");
return FALSE;
}
no_layout:
{
GST_ERROR ("no layout given");
return FALSE;
}
unknown_layout:
{
GST_ERROR ("unknown layout given");
return FALSE;
}
no_rate:
{
GST_ERROR ("no rate property given");
return FALSE;
}
no_channels:
{
GST_ERROR ("no channels property given");
return FALSE;
}
no_channel_mask:
{
GST_ERROR ("no channel-mask property given");
return FALSE;
}
invalid_channel_mask:
{
GST_ERROR ("Invalid channel mask 0x%016" G_GINT64_MODIFIER
"x for %d channels", channel_mask, channels);
return FALSE;
}
}
/**
* gst_audio_info_to_caps:
* @info: a #GstAudioInfo
*
* Convert the values of @info into a #GstCaps.
*
* Returns: (transfer full): the new #GstCaps containing the
* info of @info.
*/
GstCaps *
gst_audio_info_to_caps (const GstAudioInfo * info)
{
GstCaps *caps;
const gchar *format;
const gchar *layout;
GstAudioFlags flags;
g_return_val_if_fail (info != NULL, NULL);
g_return_val_if_fail (info->finfo != NULL, NULL);
g_return_val_if_fail (info->finfo->format != GST_AUDIO_FORMAT_UNKNOWN, NULL);
format = gst_audio_format_to_string (info->finfo->format);
g_return_val_if_fail (format != NULL, NULL);
if (info->layout == GST_AUDIO_LAYOUT_INTERLEAVED)
layout = "interleaved";
else if (info->layout == GST_AUDIO_LAYOUT_NON_INTERLEAVED)
layout = "non-interleaved";
else
g_return_val_if_reached (NULL);
flags = info->flags;
if ((flags & GST_AUDIO_FLAG_UNPOSITIONED) && info->channels > 1
&& info->position[0] != GST_AUDIO_CHANNEL_POSITION_NONE) {
flags &= ~GST_AUDIO_FLAG_UNPOSITIONED;
g_warning ("Unpositioned audio channel position flag set but "
"channel positions present");
} else if (!(flags & GST_AUDIO_FLAG_UNPOSITIONED) && info->channels > 1
&& info->position[0] == GST_AUDIO_CHANNEL_POSITION_NONE) {
flags |= GST_AUDIO_FLAG_UNPOSITIONED;
g_warning ("Unpositioned audio channel position flag not set "
"but no channel positions present");
}
caps = gst_caps_new_simple ("audio/x-raw",
"format", G_TYPE_STRING, format,
"layout", G_TYPE_STRING, layout,
"rate", G_TYPE_INT, info->rate,
"channels", G_TYPE_INT, info->channels, NULL);
if (info->channels > 1
|| info->position[0] != GST_AUDIO_CHANNEL_POSITION_MONO) {
guint64 channel_mask = 0;
if ((flags & GST_AUDIO_FLAG_UNPOSITIONED)) {
channel_mask = 0;
} else {
if (!gst_audio_channel_positions_to_mask (info->position, info->channels,
TRUE, &channel_mask))
goto invalid_channel_positions;
}
if (info->channels == 1
&& info->position[0] == GST_AUDIO_CHANNEL_POSITION_MONO) {
/* Default mono special case */
} else {
gst_caps_set_simple (caps, "channel-mask", GST_TYPE_BITMASK, channel_mask,
NULL);
}
}
return caps;
invalid_channel_positions:
{
GST_ERROR ("Invalid channel positions");
gst_caps_unref (caps);
return NULL;
}
}
/**
* gst_audio_info_convert:
* @info: a #GstAudioInfo
* @src_format: #GstFormat of the @src_value
* @src_value: value to convert
* @dest_format: #GstFormat of the @dest_value
* @dest_value: pointer to destination value
*
* Converts among various #GstFormat types. This function handles
* GST_FORMAT_BYTES, GST_FORMAT_TIME, and GST_FORMAT_DEFAULT. For
* raw audio, GST_FORMAT_DEFAULT corresponds to audio frames. This
* function can be used to handle pad queries of the type GST_QUERY_CONVERT.
*
* Returns: TRUE if the conversion was successful.
*/
gboolean
gst_audio_info_convert (const GstAudioInfo * info,
GstFormat src_fmt, gint64 src_val, GstFormat dest_fmt, gint64 * dest_val)
{
gboolean res = TRUE;
gint bpf, rate;
GST_DEBUG ("converting value %" G_GINT64_FORMAT " from %s (%d) to %s (%d)",
src_val, gst_format_get_name (src_fmt), src_fmt,
gst_format_get_name (dest_fmt), dest_fmt);
if (src_fmt == dest_fmt || src_val == -1) {
*dest_val = src_val;
goto done;
}
/* get important info */
bpf = GST_AUDIO_INFO_BPF (info);
rate = GST_AUDIO_INFO_RATE (info);
if (bpf == 0 || rate == 0) {
GST_DEBUG ("no rate or bpf configured");
res = FALSE;
goto done;
}
switch (src_fmt) {
case GST_FORMAT_BYTES:
switch (dest_fmt) {
case GST_FORMAT_TIME:
*dest_val = GST_FRAMES_TO_CLOCK_TIME (src_val / bpf, rate);
break;
case GST_FORMAT_DEFAULT:
*dest_val = src_val / bpf;
break;
default:
res = FALSE;
break;
}
break;
case GST_FORMAT_DEFAULT:
switch (dest_fmt) {
case GST_FORMAT_TIME:
*dest_val = GST_FRAMES_TO_CLOCK_TIME (src_val, rate);
break;
case GST_FORMAT_BYTES:
*dest_val = src_val * bpf;
break;
default:
res = FALSE;
break;
}
break;
case GST_FORMAT_TIME:
switch (dest_fmt) {
case GST_FORMAT_DEFAULT:
*dest_val = GST_CLOCK_TIME_TO_FRAMES (src_val, rate);
break;
case GST_FORMAT_BYTES:
*dest_val = GST_CLOCK_TIME_TO_FRAMES (src_val, rate);
*dest_val *= bpf;
break;
default:
res = FALSE;
break;
}
break;
default:
res = FALSE;
break;
}
done:
GST_DEBUG ("ret=%d result %" G_GINT64_FORMAT, res, *dest_val);
return res;
}

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gst-libs/gst/audio/audio-info.h Normal file
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@ -0,0 +1,133 @@
/* 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
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __GST_AUDIO_INFO_H__
#define __GST_AUDIO_INFO_H__
#include <gst/gst.h>
#include <gst/audio/audio-enumtypes.h>
#include <gst/audio/audio-format.h>
#include <gst/audio/audio-channels.h>
G_BEGIN_DECLS
typedef struct _GstAudioInfo GstAudioInfo;
/**
* GstAudioFlags:
* @GST_AUDIO_FLAG_NONE: no valid flag
* @GST_AUDIO_FLAG_UNPOSITIONED: the position array explicitly
* contains unpositioned channels.
*
* Extra audio flags
*/
typedef enum {
GST_AUDIO_FLAG_NONE = 0,
GST_AUDIO_FLAG_UNPOSITIONED = (1 << 0)
} GstAudioFlags;
/**
* GstAudioLayout:
* @GST_AUDIO_LAYOUT_INTERLEAVED: interleaved audio
* @GST_AUDIO_LAYOUT_NON_INTERLEAVED: non-interleaved audio
*
* Layout of the audio samples for the different channels.
*/
typedef enum {
GST_AUDIO_LAYOUT_INTERLEAVED = 0,
GST_AUDIO_LAYOUT_NON_INTERLEAVED
} GstAudioLayout;
/**
* GstAudioInfo:
* @finfo: the format info of the audio
* @flags: additional audio flags
* @layout: audio layout
* @rate: the audio sample rate
* @channels: the number of channels
* @bpf: the number of bytes for one frame, this is the size of one
* sample * @channels
* @position: the positions for each channel
*
* Information describing audio properties. This information can be filled
* in from GstCaps with gst_audio_info_from_caps().
*
* Use the provided macros to access the info in this structure.
*/
struct _GstAudioInfo {
const GstAudioFormatInfo *finfo;
GstAudioFlags flags;
GstAudioLayout layout;
gint rate;
gint channels;
gint bpf;
GstAudioChannelPosition position[64];
/*< private >*/
gpointer _gst_reserved[GST_PADDING];
};
GType gst_audio_info_get_type (void);
#define GST_AUDIO_INFO_IS_VALID(i) ((i)->finfo != NULL && (i)->rate > 0 && (i)->channels > 0 && (i)->bpf > 0)
#define GST_AUDIO_INFO_FORMAT(i) (GST_AUDIO_FORMAT_INFO_FORMAT((i)->finfo))
#define GST_AUDIO_INFO_NAME(i) (GST_AUDIO_FORMAT_INFO_NAME((i)->finfo))
#define GST_AUDIO_INFO_WIDTH(i) (GST_AUDIO_FORMAT_INFO_WIDTH((i)->finfo))
#define GST_AUDIO_INFO_DEPTH(i) (GST_AUDIO_FORMAT_INFO_DEPTH((i)->finfo))
#define GST_AUDIO_INFO_BPS(info) (GST_AUDIO_INFO_DEPTH(info) >> 3)
#define GST_AUDIO_INFO_IS_INTEGER(i) (GST_AUDIO_FORMAT_INFO_IS_INTEGER((i)->finfo))
#define GST_AUDIO_INFO_IS_FLOAT(i) (GST_AUDIO_FORMAT_INFO_IS_FLOAT((i)->finfo))
#define GST_AUDIO_INFO_IS_SIGNED(i) (GST_AUDIO_FORMAT_INFO_IS_SIGNED((i)->finfo))
#define GST_AUDIO_INFO_ENDIANNESS(i) (GST_AUDIO_FORMAT_INFO_ENDIANNES((i)->finfo))
#define GST_AUDIO_INFO_IS_LITTLE_ENDIAN(i) (GST_AUDIO_FORMAT_INFO_IS_LITTLE_ENDIAN((i)->finfo))
#define GST_AUDIO_INFO_IS_BIG_ENDIAN(i) (GST_AUDIO_FORMAT_INFO_IS_BIG_ENDIAN((i)->finfo))
#define GST_AUDIO_INFO_FLAGS(info) ((info)->flags)
#define GST_AUDIO_INFO_IS_UNPOSITIONED(info) ((info)->flags & GST_AUDIO_FLAG_UNPOSITIONED)
#define GST_AUDIO_INFO_LAYOUT(info) ((info)->layout)
#define GST_AUDIO_INFO_RATE(info) ((info)->rate)
#define GST_AUDIO_INFO_CHANNELS(info) ((info)->channels)
#define GST_AUDIO_INFO_BPF(info) ((info)->bpf)
#define GST_AUDIO_INFO_POSITION(info,c) ((info)->position[c])
GstAudioInfo * gst_audio_info_new (void);
void gst_audio_info_init (GstAudioInfo *info);
GstAudioInfo * gst_audio_info_copy (const GstAudioInfo *info);
void gst_audio_info_free (GstAudioInfo *info);
void gst_audio_info_set_format (GstAudioInfo *info, GstAudioFormat format,
gint rate, gint channels,
const GstAudioChannelPosition *position);
gboolean gst_audio_info_from_caps (GstAudioInfo *info, const GstCaps *caps);
GstCaps * gst_audio_info_to_caps (const GstAudioInfo *info);
gboolean gst_audio_info_convert (const GstAudioInfo * info,
GstFormat src_fmt, gint64 src_val,
GstFormat dest_fmt, gint64 * dest_val);
G_END_DECLS
#endif /* __GST_AUDIO_INFO_H__ */

1085
gst-libs/gst/audio/audio.c
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529
gst-libs/gst/audio/audio.h
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@ -19,506 +19,16 @@
* Boston, MA 02111-1307, USA.
*/
#include <gst/gst.h>
#ifndef __GST_AUDIO_AUDIO_H__
#define __GST_AUDIO_AUDIO_H__
G_BEGIN_DECLS
#include <gst/gst.h>
#include <gst/audio/audio-enumtypes.h>
#include <gst/audio/audio-format.h>
#include <gst/audio/audio-channels.h>
#include <gst/audio/audio-info.h>
#if G_BYTE_ORDER == G_BIG_ENDIAN
#define _GST_AUDIO_FORMAT_NE(fmt) GST_AUDIO_FORMAT_ ## fmt ## BE
#elif G_BYTE_ORDER == G_LITTLE_ENDIAN
#define _GST_AUDIO_FORMAT_NE(fmt) GST_AUDIO_FORMAT_ ## fmt ## LE
#endif
/**
* GstAudioFormat:
* @GST_AUDIO_FORMAT_UNKNOWN: unknown audio format
* @GST_AUDIO_FORMAT_S8: 8 bits in 8 bits, signed
* @GST_AUDIO_FORMAT_U8: 8 bits in 8 bits, unsigned
* @GST_AUDIO_FORMAT_S16LE: 16 bits in 16 bits, signed, little endian
* @GST_AUDIO_FORMAT_S16BE: 16 bits in 16 bits, signed, big endian
* @GST_AUDIO_FORMAT_U16LE: 16 bits in 16 bits, unsigned, little endian
* @GST_AUDIO_FORMAT_U16BE: 16 bits in 16 bits, unsigned, big endian
* @GST_AUDIO_FORMAT_S24_32LE: 24 bits in 32 bits, signed, little endian
* @GST_AUDIO_FORMAT_S24_32BE: 24 bits in 32 bits, signed, big endian
* @GST_AUDIO_FORMAT_U24_32LE: 24 bits in 32 bits, unsigned, little endian
* @GST_AUDIO_FORMAT_U24_32BE: 24 bits in 32 bits, unsigned, big endian
* @GST_AUDIO_FORMAT_S32LE: 32 bits in 32 bits, signed, little endian
* @GST_AUDIO_FORMAT_S32BE: 32 bits in 32 bits, signed, big endian
* @GST_AUDIO_FORMAT_U32LE: 32 bits in 32 bits, unsigned, little endian
* @GST_AUDIO_FORMAT_U32BE: 32 bits in 32 bits, unsigned, big endian
* @GST_AUDIO_FORMAT_S24LE: 24 bits in 24 bits, signed, little endian
* @GST_AUDIO_FORMAT_S24BE: 24 bits in 24 bits, signed, big endian
* @GST_AUDIO_FORMAT_U24LE: 24 bits in 24 bits, unsigned, little endian
* @GST_AUDIO_FORMAT_U24BE: 24 bits in 24 bits, unsigned, big endian
* @GST_AUDIO_FORMAT_S20LE: 20 bits in 24 bits, signed, little endian
* @GST_AUDIO_FORMAT_S20BE: 20 bits in 24 bits, signed, big endian
* @GST_AUDIO_FORMAT_U20LE: 20 bits in 24 bits, unsigned, little endian
* @GST_AUDIO_FORMAT_U20BE: 20 bits in 24 bits, unsigned, big endian
* @GST_AUDIO_FORMAT_S18LE: 18 bits in 24 bits, signed, little endian
* @GST_AUDIO_FORMAT_S18BE: 18 bits in 24 bits, signed, big endian
* @GST_AUDIO_FORMAT_U18LE: 18 bits in 24 bits, unsigned, little endian
* @GST_AUDIO_FORMAT_U18BE: 18 bits in 24 bits, unsigned, big endian
* @GST_AUDIO_FORMAT_F32LE: 32-bit floating point samples, little endian
* @GST_AUDIO_FORMAT_F32BE: 32-bit floating point samples, big endian
* @GST_AUDIO_FORMAT_F64LE: 64-bit floating point samples, little endian
* @GST_AUDIO_FORMAT_F64BE: 64-bit floating point samples, big endian
* @GST_AUDIO_FORMAT_S16: 16 bits in 16 bits, signed, native endianness
* @GST_AUDIO_FORMAT_U16: 16 bits in 16 bits, unsigned, native endianness
* @GST_AUDIO_FORMAT_S24_32: 24 bits in 32 bits, signed, native endianness
* @GST_AUDIO_FORMAT_U24_32: 24 bits in 32 bits, unsigned, native endianness
* @GST_AUDIO_FORMAT_S32: 32 bits in 32 bits, signed, native endianness
* @GST_AUDIO_FORMAT_U32: 32 bits in 32 bits, unsigned, native endianness
* @GST_AUDIO_FORMAT_S24: 24 bits in 24 bits, signed, native endianness
* @GST_AUDIO_FORMAT_U24: 24 bits in 24 bits, unsigned, native endianness
* @GST_AUDIO_FORMAT_S20: 20 bits in 24 bits, signed, native endianness
* @GST_AUDIO_FORMAT_U20: 20 bits in 24 bits, unsigned, native endianness
* @GST_AUDIO_FORMAT_S18: 18 bits in 24 bits, signed, native endianness
* @GST_AUDIO_FORMAT_U18: 18 bits in 24 bits, unsigned, native endianness
* @GST_AUDIO_FORMAT_F32: 32-bit floating point samples, native endianness
* @GST_AUDIO_FORMAT_F64: 64-bit floating point samples, native endianness
*
* Enum value describing the most common audio formats.
*/
typedef enum {
GST_AUDIO_FORMAT_UNKNOWN,
/* 8 bit */
GST_AUDIO_FORMAT_S8,
GST_AUDIO_FORMAT_U8,
/* 16 bit */
GST_AUDIO_FORMAT_S16LE,
GST_AUDIO_FORMAT_S16BE,
GST_AUDIO_FORMAT_U16LE,
GST_AUDIO_FORMAT_U16BE,
/* 24 bit in low 3 bytes of 32 bits*/
GST_AUDIO_FORMAT_S24_32LE,
GST_AUDIO_FORMAT_S24_32BE,
GST_AUDIO_FORMAT_U24_32LE,
GST_AUDIO_FORMAT_U24_32BE,
/* 32 bit */
GST_AUDIO_FORMAT_S32LE,
GST_AUDIO_FORMAT_S32BE,
GST_AUDIO_FORMAT_U32LE,
GST_AUDIO_FORMAT_U32BE,
/* 24 bit in 3 bytes*/
GST_AUDIO_FORMAT_S24LE,
GST_AUDIO_FORMAT_S24BE,
GST_AUDIO_FORMAT_U24LE,
GST_AUDIO_FORMAT_U24BE,
/* 20 bit in 3 bytes*/
GST_AUDIO_FORMAT_S20LE,
GST_AUDIO_FORMAT_S20BE,
GST_AUDIO_FORMAT_U20LE,
GST_AUDIO_FORMAT_U20BE,
/* 18 bit in 3 bytes*/
GST_AUDIO_FORMAT_S18LE,
GST_AUDIO_FORMAT_S18BE,
GST_AUDIO_FORMAT_U18LE,
GST_AUDIO_FORMAT_U18BE,
/* float */
GST_AUDIO_FORMAT_F32LE,
GST_AUDIO_FORMAT_F32BE,
GST_AUDIO_FORMAT_F64LE,
GST_AUDIO_FORMAT_F64BE,
/* native endianness equivalents */
GST_AUDIO_FORMAT_S16 = _GST_AUDIO_FORMAT_NE(S16),
GST_AUDIO_FORMAT_U16 = _GST_AUDIO_FORMAT_NE(U16),
GST_AUDIO_FORMAT_S24_32 = _GST_AUDIO_FORMAT_NE(S24_32),
GST_AUDIO_FORMAT_U24_32 = _GST_AUDIO_FORMAT_NE(U24_32),
GST_AUDIO_FORMAT_S32 = _GST_AUDIO_FORMAT_NE(S32),
GST_AUDIO_FORMAT_U32 = _GST_AUDIO_FORMAT_NE(U32),
GST_AUDIO_FORMAT_S24 = _GST_AUDIO_FORMAT_NE(S24),
GST_AUDIO_FORMAT_U24 = _GST_AUDIO_FORMAT_NE(U24),
GST_AUDIO_FORMAT_S20 = _GST_AUDIO_FORMAT_NE(S20),
GST_AUDIO_FORMAT_U20 = _GST_AUDIO_FORMAT_NE(U20),
GST_AUDIO_FORMAT_S18 = _GST_AUDIO_FORMAT_NE(S18),
GST_AUDIO_FORMAT_U18 = _GST_AUDIO_FORMAT_NE(U18),
GST_AUDIO_FORMAT_F32 = _GST_AUDIO_FORMAT_NE(F32),
GST_AUDIO_FORMAT_F64 = _GST_AUDIO_FORMAT_NE(F64)
} GstAudioFormat;
typedef struct _GstAudioFormatInfo GstAudioFormatInfo;
typedef struct _GstAudioInfo GstAudioInfo;
/**
* GstAudioFormatFlags:
* @GST_AUDIO_FORMAT_FLAG_INTEGER: integer samples
* @GST_AUDIO_FORMAT_FLAG_FLOAT: float samples
* @GST_AUDIO_FORMAT_FLAG_SIGNED: signed samples
* @GST_AUDIO_FORMAT_FLAG_COMPLEX: complex layout
*
* The different audio flags that a format info can have.
*/
typedef enum
{
GST_AUDIO_FORMAT_FLAG_INTEGER = (1 << 0),
GST_AUDIO_FORMAT_FLAG_FLOAT = (1 << 1),
GST_AUDIO_FORMAT_FLAG_SIGNED = (1 << 2),
GST_AUDIO_FORMAT_FLAG_COMPLEX = (1 << 4)
} GstAudioFormatFlags;
/**
* GstAudioPackFlags:
* @GST_AUDIO_PACK_FLAG_NONE: No flag
*
* The different flags that can be used when packing and unpacking.
*/
typedef enum
{
GST_AUDIO_PACK_FLAG_NONE = 0
} GstAudioPackFlags;
/**
* GstAudioFormatUnpack:
* @info: a #GstAudioFormatInfo
* @dest: a destination array
* @data: pointer to the audio data
* @length: the amount of samples to unpack.
*
* Unpacks @length samples from the given data of format @info.
* The samples will be unpacked into @dest which each channel
* interleaved. @dest should at least be big enough to hold @length *
* channels * size(unpack_format) bytes.
*/
typedef void (*GstAudioFormatUnpack) (const GstAudioFormatInfo *info,
GstAudioPackFlags flags, gpointer dest,
const gpointer data, gint length);
/**
* GstAudioFormatPack:
* @info: a #GstAudioFormatInfo
* @src: a source array
* @data: pointer to the destination data
* @length: the amount of samples to pack.
*
* Packs @length samples from @src to the data array in format @info.
* The samples from source have each channel interleaved
* and will be packed into @data.
*/
typedef void (*GstAudioFormatPack) (const GstAudioFormatInfo *info,
GstAudioPackFlags flags, const gpointer src,
gpointer data, gint length);
/**
* GstAudioFormatInfo:
* @format: #GstAudioFormat
* @name: string representation of the format
* @description: user readable description of the format
* @flags: #GstAudioFormatFlags
* @endianness: the endianness
* @width: amount of bits used for one sample
* @depth: amount of valid bits in @width
* @silence: @width/8 bytes with 1 silent sample
* @unpack_format: the format of the unpacked samples
* @unpack_func: function to unpack samples
* @pack_func: function to pack samples
*
* Information for an audio format.
*/
struct _GstAudioFormatInfo {
GstAudioFormat format;
const gchar *name;
const gchar *description;
GstAudioFormatFlags flags;
gint endianness;
gint width;
gint depth;
guint8 silence[8];
GstAudioFormat unpack_format;
GstAudioFormatUnpack unpack_func;
GstAudioFormatPack pack_func;
/*< private >*/
gpointer _gst_reserved[GST_PADDING];
};
GType gst_audio_format_info_get_type (void);
#define GST_AUDIO_FORMAT_INFO_FORMAT(info) ((info)->format)
#define GST_AUDIO_FORMAT_INFO_NAME(info) ((info)->name)
#define GST_AUDIO_FORMAT_INFO_FLAGS(info) ((info)->flags)
#define GST_AUDIO_FORMAT_INFO_IS_INTEGER(info) !!((info)->flags & GST_AUDIO_FORMAT_FLAG_INTEGER)
#define GST_AUDIO_FORMAT_INFO_IS_FLOAT(info) !!((info)->flags & GST_AUDIO_FORMAT_FLAG_FLOAT)
#define GST_AUDIO_FORMAT_INFO_IS_SIGNED(info) !!((info)->flags & GST_AUDIO_FORMAT_FLAG_SIGNED)
#define GST_AUDIO_FORMAT_INFO_ENDIANNESS(info) ((info)->endianness)
#define GST_AUDIO_FORMAT_INFO_IS_LITTLE_ENDIAN(info) ((info)->endianness == G_LITTLE_ENDIAN)
#define GST_AUDIO_FORMAT_INFO_IS_BIG_ENDIAN(info) ((info)->endianness == G_BIG_ENDIAN)
#define GST_AUDIO_FORMAT_INFO_WIDTH(info) ((info)->width)
#define GST_AUDIO_FORMAT_INFO_DEPTH(info) ((info)->depth)
GstAudioFormat gst_audio_format_build_integer (gboolean sign, gint endianness,
gint width, gint depth) G_GNUC_CONST;
GstAudioFormat gst_audio_format_from_string (const gchar *format) G_GNUC_CONST;
const gchar * gst_audio_format_to_string (GstAudioFormat format) G_GNUC_CONST;
const GstAudioFormatInfo *
gst_audio_format_get_info (GstAudioFormat format) G_GNUC_CONST;
void gst_audio_format_fill_silence (const GstAudioFormatInfo *info,
gpointer dest, gsize length);
/**
* 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)
/**
* GstAudioFlags:
* @GST_AUDIO_FLAG_NONE: no valid flag
* @GST_AUDIO_FLAG_UNPOSITIONED: the position array explicitly
* contains unpositioned channels.
*
* Extra audio flags
*/
typedef enum {
GST_AUDIO_FLAG_NONE = 0,
GST_AUDIO_FLAG_UNPOSITIONED = (1 << 0)
} GstAudioFlags;
/**
* GstAudioLayout:
* @GST_AUDIO_LAYOUT_INTERLEAVED: interleaved audio
* @GST_AUDIO_LAYOUT_NON_INTERLEAVED: non-interleaved audio
*
* Layout of the audio samples for the different channels.
*/
typedef enum {
GST_AUDIO_LAYOUT_INTERLEAVED = 0,
GST_AUDIO_LAYOUT_NON_INTERLEAVED
} GstAudioLayout;
/**
* GstAudioInfo:
* @finfo: the format info of the audio
* @flags: additional audio flags
* @layout: audio layout
* @rate: the audio sample rate
* @channels: the number of channels
* @bpf: the number of bytes for one frame, this is the size of one
* sample * @channels
* @position: the positions for each channel
*
* Information describing audio properties. This information can be filled
* in from GstCaps with gst_audio_info_from_caps().
*
* Use the provided macros to access the info in this structure.
*/
struct _GstAudioInfo {
const GstAudioFormatInfo *finfo;
GstAudioFlags flags;
GstAudioLayout layout;
gint rate;
gint channels;
gint bpf;
GstAudioChannelPosition position[64];
/*< private >*/
gpointer _gst_reserved[GST_PADDING];
};
GType gst_audio_info_get_type (void);
#define GST_AUDIO_INFO_IS_VALID(i) ((i)->finfo != NULL && (i)->rate > 0 && (i)->channels > 0 && (i)->bpf > 0)
#define GST_AUDIO_INFO_FORMAT(i) (GST_AUDIO_FORMAT_INFO_FORMAT((i)->finfo))
#define GST_AUDIO_INFO_NAME(i) (GST_AUDIO_FORMAT_INFO_NAME((i)->finfo))
#define GST_AUDIO_INFO_WIDTH(i) (GST_AUDIO_FORMAT_INFO_WIDTH((i)->finfo))
#define GST_AUDIO_INFO_DEPTH(i) (GST_AUDIO_FORMAT_INFO_DEPTH((i)->finfo))
#define GST_AUDIO_INFO_BPS(info) (GST_AUDIO_INFO_DEPTH(info) >> 3)
#define GST_AUDIO_INFO_IS_INTEGER(i) (GST_AUDIO_FORMAT_INFO_IS_INTEGER((i)->finfo))
#define GST_AUDIO_INFO_IS_FLOAT(i) (GST_AUDIO_FORMAT_INFO_IS_FLOAT((i)->finfo))
#define GST_AUDIO_INFO_IS_SIGNED(i) (GST_AUDIO_FORMAT_INFO_IS_SIGNED((i)->finfo))
#define GST_AUDIO_INFO_ENDIANNESS(i) (GST_AUDIO_FORMAT_INFO_ENDIANNES((i)->finfo))
#define GST_AUDIO_INFO_IS_LITTLE_ENDIAN(i) (GST_AUDIO_FORMAT_INFO_IS_LITTLE_ENDIAN((i)->finfo))
#define GST_AUDIO_INFO_IS_BIG_ENDIAN(i) (GST_AUDIO_FORMAT_INFO_IS_BIG_ENDIAN((i)->finfo))
#define GST_AUDIO_INFO_FLAGS(info) ((info)->flags)
#define GST_AUDIO_INFO_IS_UNPOSITIONED(info) ((info)->flags & GST_AUDIO_FLAG_UNPOSITIONED)
#define GST_AUDIO_INFO_LAYOUT(info) ((info)->layout)
#define GST_AUDIO_INFO_RATE(info) ((info)->rate)
#define GST_AUDIO_INFO_CHANNELS(info) ((info)->channels)
#define GST_AUDIO_INFO_BPF(info) ((info)->bpf)
#define GST_AUDIO_INFO_POSITION(info,c) ((info)->position[c])
GstAudioInfo * gst_audio_info_new (void);
void gst_audio_info_init (GstAudioInfo *info);
GstAudioInfo * gst_audio_info_copy (const GstAudioInfo *info);
void gst_audio_info_free (GstAudioInfo *info);
void gst_audio_info_set_format (GstAudioInfo *info, GstAudioFormat format,
gint rate, gint channels,
const GstAudioChannelPosition *position);
gboolean gst_audio_info_from_caps (GstAudioInfo *info, const GstCaps *caps);
GstCaps * gst_audio_info_to_caps (const GstAudioInfo *info);
gboolean gst_audio_info_convert (const GstAudioInfo * info,
GstFormat src_fmt, gint64 src_val,
GstFormat dest_fmt, gint64 * dest_val);
#define GST_AUDIO_RATE_RANGE "(int) [ 1, max ]"
#define GST_AUDIO_CHANNELS_RANGE "(int) [ 1, max ]"
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
# define GST_AUDIO_NE(s) G_STRINGIFY(s)"LE"
# define GST_AUDIO_OE(s) G_STRINGIFY(s)"BE"
#else
# define GST_AUDIO_NE(s) G_STRINGIFY(s)"BE"
# define GST_AUDIO_OE(s) G_STRINGIFY(s)"LE"
#endif
#define GST_AUDIO_FORMATS_ALL " { S8, U8, " \
"S16LE, S16BE, U16LE, U16BE, " \
"S24_32LE, S24_32BE, U24_32LE, U24_32BE, " \
"S32LE, S32BE, U32LE, U32BE, " \
"S24LE, S24BE, U24LE, U24BE, " \
"S20LE, S20BE, U20LE, U20BE, " \
"S18LE, S18BE, U18LE, U18BE, " \
"F32LE, F32BE, F64LE, F64BE }"
/**
* GST_AUDIO_CAPS_MAKE:
* @format: string format that describes the pixel layout, as string
* (e.g. "S16LE", "S8", etc.)
*
* Generic caps string for audio, for use in pad templates.
*/
#define GST_AUDIO_CAPS_MAKE(format) \
"audio/x-raw, " \
"format = (string) " format ", " \
"rate = " GST_AUDIO_RATE_RANGE ", " \
"channels = " GST_AUDIO_CHANNELS_RANGE
/**
* GST_AUDIO_DEF_RATE:
*
* Standard sampling rate used in consumer audio.
*/
#define GST_AUDIO_DEF_RATE 44100
/**
* GST_AUDIO_DEF_CHANNELS:
*
* Standard number of channels used in consumer audio.
*/
#define GST_AUDIO_DEF_CHANNELS 2
/**
* GST_AUDIO_DEF_FORMAT:
*
* Standard format used in consumer audio.
*/
#define GST_AUDIO_DEF_FORMAT "S16LE"
G_BEGIN_DECLS
/* conversion macros */
/**
@ -550,35 +60,6 @@ GstBuffer * gst_audio_buffer_clip (GstBuffer *buffer, GstSegment *segment
gint rate, gint bpf);
gboolean gst_audio_buffer_reorder_channels (GstBuffer * buffer,
GstAudioFormat format,
gint channels,
const GstAudioChannelPosition * from,
const GstAudioChannelPosition * to);
gboolean gst_audio_reorder_channels (gpointer data, gsize size,
GstAudioFormat format,
gint channels,
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);
gboolean gst_audio_channel_positions_to_mask (const GstAudioChannelPosition *position,
gint channels, guint64 *channel_mask);
gboolean gst_audio_channel_positions_from_mask (gint channels, guint64 channel_mask,
GstAudioChannelPosition * position);
gboolean gst_audio_get_channel_reorder_map (gint channels,
const GstAudioChannelPosition * from,
const GstAudioChannelPosition * to,
gint *reorder_map);
G_END_DECLS
#endif /* __GST_AUDIO_AUDIO_H__ */