Commit 3da0b718 authored by Wim Taymans's avatar Wim Taymans

audio: split audio header into logical parts

parent d7ee6a9c
# 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 \
......
This diff is collapsed.
/* 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__ */
/* 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.
*/
#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__ */
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