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

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* Library <2001> Thomas Vander Stichele <thomas@apestaart.org>
*
* 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_AUDIO_H__
#define __GST_AUDIO_AUDIO_H__
#include <gst/audio/multichannel.h>
G_BEGIN_DECLS
/**
* GstAudioFormat:
* @GST_AUDIO_FORMAT_UNKNOWN: unknown audio format
* @GST_AUDIO_FORMAT_S8: sample
* @GST_AUDIO_FORMAT_U8: sample
* @GST_AUDIO_FORMAT_S16_LE: sample
* @GST_AUDIO_FORMAT_S16_BE: sample
* @GST_AUDIO_FORMAT_U16_LE: sample
* @GST_AUDIO_FORMAT_U16_BE: sample
* @GST_AUDIO_FORMAT_S24_LE: sample
* @GST_AUDIO_FORMAT_S24_BE: sample
* @GST_AUDIO_FORMAT_U24_LE: sample
* @GST_AUDIO_FORMAT_U24_BE: sample
* @GST_AUDIO_FORMAT_S32_LE: sample
* @GST_AUDIO_FORMAT_S32_BE: sample
* @GST_AUDIO_FORMAT_U32_LE: sample
* @GST_AUDIO_FORMAT_U32_BE: sample
* @GST_AUDIO_FORMAT_S24_3LE: sample
* @GST_AUDIO_FORMAT_S24_3BE: sample
* @GST_AUDIO_FORMAT_U24_3LE: sample
* @GST_AUDIO_FORMAT_U24_3BE: sample
* @GST_AUDIO_FORMAT_S20_3LE: sample
* @GST_AUDIO_FORMAT_S20_3BE: sample
* @GST_AUDIO_FORMAT_U20_3LE: sample
* @GST_AUDIO_FORMAT_U20_3BE: sample
* @GST_AUDIO_FORMAT_S18_3LE: sample
* @GST_AUDIO_FORMAT_S18_3BE: sample
* @GST_AUDIO_FORMAT_U18_3LE: sample
* @GST_AUDIO_FORMAT_U18_3BE: sample
* @GST_AUDIO_FORMAT_F32_LE: sample
* @GST_AUDIO_FORMAT_F32_BE: sample
* @GST_AUDIO_FORMAT_F64_LE: sample
* @GST_AUDIO_FORMAT_F64_BE: sample
*
* Enum value describing the most common audio formats.
*
* Since: 0.10.36
*/
typedef enum {
GST_AUDIO_FORMAT_UNKNOWN,
/* 8 bit */
GST_AUDIO_FORMAT_S8,
GST_AUDIO_FORMAT_U8,
/* 16 bit */
GST_AUDIO_FORMAT_S16_LE,
GST_AUDIO_FORMAT_S16_BE,
GST_AUDIO_FORMAT_U16_LE,
GST_AUDIO_FORMAT_U16_BE,
/* 24 bit in low 3 bytes of 32 bits*/
GST_AUDIO_FORMAT_S24_LE,
GST_AUDIO_FORMAT_S24_BE,
GST_AUDIO_FORMAT_U24_LE,
GST_AUDIO_FORMAT_U24_BE,
/* 32 bit */
GST_AUDIO_FORMAT_S32_LE,
GST_AUDIO_FORMAT_S32_BE,
GST_AUDIO_FORMAT_U32_LE,
GST_AUDIO_FORMAT_U32_BE,
/* 24 bit in 3 bytes*/
GST_AUDIO_FORMAT_S24_3LE,
GST_AUDIO_FORMAT_S24_3BE,
GST_AUDIO_FORMAT_U24_3LE,
GST_AUDIO_FORMAT_U24_3BE,
/* 20 bit in 3 bytes*/
GST_AUDIO_FORMAT_S20_3LE,
GST_AUDIO_FORMAT_S20_3BE,
GST_AUDIO_FORMAT_U20_3LE,
GST_AUDIO_FORMAT_U20_3BE,
/* 18 bit in 3 bytes*/
GST_AUDIO_FORMAT_S18_3LE,
GST_AUDIO_FORMAT_S18_3BE,
GST_AUDIO_FORMAT_U18_3LE,
GST_AUDIO_FORMAT_U18_3BE,
/* float */
GST_AUDIO_FORMAT_F32_LE,
GST_AUDIO_FORMAT_F32_BE,
GST_AUDIO_FORMAT_F64_LE,
GST_AUDIO_FORMAT_F64_BE,
#if G_BYTE_ORDER == G_BIG_ENDIAN
GST_AUDIO_FORMAT_S16 = GST_AUDIO_FORMAT_S16_BE,
GST_AUDIO_FORMAT_U16 = GST_AUDIO_FORMAT_U16_BE,
GST_AUDIO_FORMAT_S24 = GST_AUDIO_FORMAT_S24_BE,
GST_AUDIO_FORMAT_U24 = GST_AUDIO_FORMAT_U24_BE,
GST_AUDIO_FORMAT_S32 = GST_AUDIO_FORMAT_S32_BE,
GST_AUDIO_FORMAT_U32 = GST_AUDIO_FORMAT_U32_BE,
GST_AUDIO_FORMAT_S24_3 = GST_AUDIO_FORMAT_S24_3BE,
GST_AUDIO_FORMAT_U24_3 = GST_AUDIO_FORMAT_U24_3BE,
GST_AUDIO_FORMAT_S20_3 = GST_AUDIO_FORMAT_S20_3BE,
GST_AUDIO_FORMAT_U20_3 = GST_AUDIO_FORMAT_U20_3BE,
GST_AUDIO_FORMAT_S18_3 = GST_AUDIO_FORMAT_S18_3BE,
GST_AUDIO_FORMAT_U18_3 = GST_AUDIO_FORMAT_U18_3BE,
GST_AUDIO_FORMAT_F32 = GST_AUDIO_FORMAT_F32_BE,
GST_AUDIO_FORMAT_F64 = GST_AUDIO_FORMAT_F64_BE
#elif G_BYTE_ORDER == G_LITTLE_ENDIAN
GST_AUDIO_FORMAT_S16 = GST_AUDIO_FORMAT_S16_LE,
GST_AUDIO_FORMAT_U16 = GST_AUDIO_FORMAT_U16_LE,
GST_AUDIO_FORMAT_S24 = GST_AUDIO_FORMAT_S24_LE,
GST_AUDIO_FORMAT_U24 = GST_AUDIO_FORMAT_U24_LE,
GST_AUDIO_FORMAT_S32 = GST_AUDIO_FORMAT_S32_LE,
GST_AUDIO_FORMAT_U32 = GST_AUDIO_FORMAT_U32_LE,
GST_AUDIO_FORMAT_S24_3 = GST_AUDIO_FORMAT_S24_3LE,
GST_AUDIO_FORMAT_U24_3 = GST_AUDIO_FORMAT_U24_3LE,
GST_AUDIO_FORMAT_S20_3 = GST_AUDIO_FORMAT_S20_3LE,
GST_AUDIO_FORMAT_U20_3 = GST_AUDIO_FORMAT_U20_3LE,
GST_AUDIO_FORMAT_S18_3 = GST_AUDIO_FORMAT_S18_3LE,
GST_AUDIO_FORMAT_U18_3 = GST_AUDIO_FORMAT_U18_3LE,
GST_AUDIO_FORMAT_F32 = GST_AUDIO_FORMAT_F32_LE,
GST_AUDIO_FORMAT_F64 = GST_AUDIO_FORMAT_F64_LE
#endif
} GstAudioFormat;
/* FIXME: need GTypes */
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.
*
* Since: 0.10.36
*/
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;
/**
* GstAudioFormatInfo:
* @format: #GstAudioFormat
* @name: string representation 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
*
* Information for an audio format.
*
* Since: 0.10.36
*/
struct _GstAudioFormatInfo {
GstAudioFormat format;
const gchar * name;
GstAudioFormatFlags flags;
gint endianness;
gint width;
gint depth;
guint8 silence[8];
/*< private >*/
guint padding_i[4];
gpointer padding_p[4];
};
#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_LE(info) ((info)->endianness == G_LITTLE_ENDIAN)
#define GST_AUDIO_FORMAT_INFO_IS_BE(info) ((info)->endianness == G_BIG_ENDIAN)
#define GST_AUDIO_FORMAT_INFO_WIDTH(info) ((info)->width)
#define GST_AUDIO_FORMAT_INFO_DEPTH(info) ((info)->depth)
const GstAudioFormatInfo * gst_audio_format_get_info (GstAudioFormat format) G_GNUC_CONST;
/**
* GstAudioFlags:
* @GST_AUDIO_FLAG_NONE: no valid flag
* @GST_AUDIO_FLAG_DEFAULT_POSITIONS: unpositioned audio layout, position array
* contains the default layout (meaning that the channel layout was not
* explicitly specified in the caps)
*
* Extra audio flags
*
* Since: 0.10.36
*/
typedef enum {
GST_AUDIO_FLAG_NONE = 0,
GST_AUDIO_FLAG_DEFAULT_POSITIONS = (1 << 0)
} GstAudioFlags;
/**
* GstAudioInfo:
* @finfo: the format info of the audio
* @flags: additional audio flags
* @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
* @positions: 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.
*
* Since: 0.10.36
*/
struct _GstAudioInfo {
const GstAudioFormatInfo *finfo;
GstAudioFlags flags;
gint rate;
gint channels;
gint bpf;
GstAudioChannelPosition position[64];
};
#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_FLAGS(info) ((info)->flags)
#define GST_AUDIO_INFO_HAS_DEFAULT_POSITIONS(info) ((info)->flags & GST_AUDIO_FLAG_DEFAULT_POSITIONS)
#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])
void gst_audio_info_init (GstAudioInfo * info);
void gst_audio_info_clear (GstAudioInfo * info);
GstAudioInfo * gst_audio_info_copy (GstAudioInfo * info);
void gst_audio_info_free (GstAudioInfo * info);
gboolean gst_audio_info_from_caps (GstAudioInfo * info, const GstCaps * caps);
GstCaps * gst_audio_info_to_caps (GstAudioInfo * info);
gboolean gst_audio_info_convert (GstAudioInfo * info,
GstFormat src_fmt, gint64 src_val,
GstFormat dest_fmt, gint64 * dest_val);
/* For people that are looking at this source: the purpose of these defines is
* to make GstCaps a bit easier, in that you don't have to know all of the
* properties that need to be defined. you can just use these macros. currently
* (8/01) the only plugins that use these are the passthrough, speed, volume,
* adder, and [de]interleave plugins. These are for convenience only, and do not
* specify the 'limits' of GStreamer. you might also use these definitions as a
* base for making your own caps, if need be.
*
* For example, to make a source pad that can output streams of either mono
* float or any channel int:
*
* template = gst_pad_template_new
* ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
* gst_caps_append(gst_caps_new ("sink_int", "audio/x-raw-int",
* GST_AUDIO_INT_PAD_TEMPLATE_PROPS),
* gst_caps_new ("sink_float", "audio/x-raw-float",
* GST_AUDIO_FLOAT_PAD_TEMPLATE_PROPS)),
* NULL);
*
* sinkpad = gst_pad_new_from_template(template, "sink");
*
* Andy Wingo, 18 August 2001
* Thomas, 6 September 2002 */
/* conversion macros */
/**
* GST_FRAMES_TO_CLOCK_TIME:
* @frames: sample frames
* @rate: sampling rate
*
* Calculate clocktime from sample @frames and @rate.
*/
#define GST_FRAMES_TO_CLOCK_TIME(frames, rate) \
((GstClockTime) gst_util_uint64_scale_round (frames, GST_SECOND, rate))
/**
* GST_CLOCK_TIME_TO_FRAMES:
* @clocktime: clock time
* @rate: sampling rate
*
* Calculate frames from @clocktime and sample @rate.
*/
#define GST_CLOCK_TIME_TO_FRAMES(clocktime, rate) \
gst_util_uint64_scale_round (clocktime, rate, GST_SECOND)
/**
* GST_AUDIO_DEF_RATE:
*
* Standard sampling rate used in consumer audio.
*/
#define GST_AUDIO_DEF_RATE 44100
/**
* GST_AUDIO_INT_PAD_TEMPLATE_CAPS:
*
* Template caps for integer audio. Can be used when defining a
* #GstStaticPadTemplate
*/
#define GST_AUDIO_INT_PAD_TEMPLATE_CAPS \
"audio/x-raw-int, " \
"rate = (int) [ 1, MAX ], " \
"channels = (int) [ 1, MAX ], " \
"endianness = (int) { LITTLE_ENDIAN, BIG_ENDIAN }, " \
"width = (int) { 8, 16, 24, 32 }, " \
"depth = (int) [ 1, 32 ], " \
"signed = (boolean) { true, false }"
/**
* GST_AUDIO_INT_STANDARD_PAD_TEMPLATE_CAPS:
*
* Template caps for 16bit integer stereo audio in native byte-order.
* Can be used when defining a #GstStaticPadTemplate
*/
#define GST_AUDIO_INT_STANDARD_PAD_TEMPLATE_CAPS \
"audio/x-raw-int, " \
"rate = (int) [ 1, MAX ], " \
"channels = (int) 2, " \
"endianness = (int) BYTE_ORDER, " \
"width = (int) 16, " \
"depth = (int) 16, " \
"signed = (boolean) true"
/**
* GST_AUDIO_FLOAT_PAD_TEMPLATE_CAPS:
*
* Template caps for float audio. Can be used when defining a
* #GstStaticPadTemplate
*/
#define GST_AUDIO_FLOAT_PAD_TEMPLATE_CAPS \
"audio/x-raw-float, " \
"rate = (int) [ 1, MAX ], " \
"channels = (int) [ 1, MAX ], " \
"endianness = (int) { LITTLE_ENDIAN , BIG_ENDIAN }, " \
"width = (int) { 32, 64 }"
/**
* GST_AUDIO_FLOAT_STANDARD_PAD_TEMPLATE_CAPS:
*
* Template caps for 32bit float mono audio in native byte-order.
* Can be used when defining a #GstStaticPadTemplate
*/
#define GST_AUDIO_FLOAT_STANDARD_PAD_TEMPLATE_CAPS \
"audio/x-raw-float, " \
"width = (int) 32, " \
"rate = (int) [ 1, MAX ], " \
"channels = (int) 1, " \
"endianness = (int) BYTE_ORDER"
/*
* this library defines and implements some helper functions for audio
* handling
*/
/* get byte size of audio frame (based on caps of pad */
int gst_audio_frame_byte_size (GstPad* pad);
/* get length in frames of buffer */
long gst_audio_frame_length (GstPad* pad, GstBuffer* buf);
GstClockTime gst_audio_duration_from_pad_buffer (GstPad * pad, GstBuffer * buf);
/* check if the buffer size is a whole multiple of the frame size */
gboolean gst_audio_is_buffer_framed (GstPad* pad, GstBuffer* buf);
/* functions useful for _getcaps functions */
/**
* GstAudioFieldFlag:
* @GST_AUDIO_FIELD_RATE: add rate field to caps
* @GST_AUDIO_FIELD_CHANNELS: add channels field to caps
* @GST_AUDIO_FIELD_ENDIANNESS: add endianness field to caps
* @GST_AUDIO_FIELD_WIDTH: add width field to caps
* @GST_AUDIO_FIELD_DEPTH: add depth field to caps
* @GST_AUDIO_FIELD_SIGNED: add signed field to caps
*
* Do not use anymore.
*
* Deprecated: use gst_structure_set() directly
*/
#ifndef GST_DISABLE_DEPRECATED
typedef enum {
GST_AUDIO_FIELD_RATE = (1 << 0),
GST_AUDIO_FIELD_CHANNELS = (1 << 1),
GST_AUDIO_FIELD_ENDIANNESS = (1 << 2),
GST_AUDIO_FIELD_WIDTH = (1 << 3),
GST_AUDIO_FIELD_DEPTH = (1 << 4),
GST_AUDIO_FIELD_SIGNED = (1 << 5)
} GstAudioFieldFlag;
#endif
#ifndef GST_DISABLE_DEPRECATED
void gst_audio_structure_set_int (GstStructure *structure, GstAudioFieldFlag flag);
#endif /* GST_DISABLE_DEPRECATED */
GstBuffer *gst_audio_buffer_clip (GstBuffer *buffer, GstSegment *segment, gint rate, gint frame_size);
G_END_DECLS
#endif /* __GST_AUDIO_AUDIO_H__ */
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