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412 lines
15 KiB
C
412 lines
15 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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* Library <2001> Thomas Vander Stichele <thomas@apestaart.org>
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* <2011> Wim Taymans <wim.taymans@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_AUDIO_AUDIO_H__
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#include <gst/audio/audio.h>
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#endif
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#ifndef __GST_AUDIO_FORMAT_H__
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#define __GST_AUDIO_FORMAT_H__
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G_BEGIN_DECLS
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#if G_BYTE_ORDER == G_BIG_ENDIAN
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#define _GST_AUDIO_FORMAT_NE(fmt) GST_AUDIO_FORMAT_ ## fmt ## BE
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#define _GST_AUDIO_FORMAT_OE(fmt) GST_AUDIO_FORMAT_ ## fmt ## LE
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#elif G_BYTE_ORDER == G_LITTLE_ENDIAN
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#define _GST_AUDIO_FORMAT_NE(fmt) GST_AUDIO_FORMAT_ ## fmt ## LE
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#define _GST_AUDIO_FORMAT_OE(fmt) GST_AUDIO_FORMAT_ ## fmt ## BE
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#endif
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/**
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* GstAudioFormat:
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* @GST_AUDIO_FORMAT_UNKNOWN: unknown or unset audio format
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* @GST_AUDIO_FORMAT_ENCODED: encoded audio format
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* @GST_AUDIO_FORMAT_S8: 8 bits in 8 bits, signed
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* @GST_AUDIO_FORMAT_U8: 8 bits in 8 bits, unsigned
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* @GST_AUDIO_FORMAT_S16LE: 16 bits in 16 bits, signed, little endian
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* @GST_AUDIO_FORMAT_S16BE: 16 bits in 16 bits, signed, big endian
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* @GST_AUDIO_FORMAT_U16LE: 16 bits in 16 bits, unsigned, little endian
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* @GST_AUDIO_FORMAT_U16BE: 16 bits in 16 bits, unsigned, big endian
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* @GST_AUDIO_FORMAT_S24_32LE: 24 bits in 32 bits, signed, little endian
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* @GST_AUDIO_FORMAT_S24_32BE: 24 bits in 32 bits, signed, big endian
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* @GST_AUDIO_FORMAT_U24_32LE: 24 bits in 32 bits, unsigned, little endian
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* @GST_AUDIO_FORMAT_U24_32BE: 24 bits in 32 bits, unsigned, big endian
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* @GST_AUDIO_FORMAT_S32LE: 32 bits in 32 bits, signed, little endian
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* @GST_AUDIO_FORMAT_S32BE: 32 bits in 32 bits, signed, big endian
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* @GST_AUDIO_FORMAT_U32LE: 32 bits in 32 bits, unsigned, little endian
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* @GST_AUDIO_FORMAT_U32BE: 32 bits in 32 bits, unsigned, big endian
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* @GST_AUDIO_FORMAT_S24LE: 24 bits in 24 bits, signed, little endian
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* @GST_AUDIO_FORMAT_S24BE: 24 bits in 24 bits, signed, big endian
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* @GST_AUDIO_FORMAT_U24LE: 24 bits in 24 bits, unsigned, little endian
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* @GST_AUDIO_FORMAT_U24BE: 24 bits in 24 bits, unsigned, big endian
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* @GST_AUDIO_FORMAT_S20LE: 20 bits in 24 bits, signed, little endian
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* @GST_AUDIO_FORMAT_S20BE: 20 bits in 24 bits, signed, big endian
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* @GST_AUDIO_FORMAT_U20LE: 20 bits in 24 bits, unsigned, little endian
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* @GST_AUDIO_FORMAT_U20BE: 20 bits in 24 bits, unsigned, big endian
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* @GST_AUDIO_FORMAT_S18LE: 18 bits in 24 bits, signed, little endian
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* @GST_AUDIO_FORMAT_S18BE: 18 bits in 24 bits, signed, big endian
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* @GST_AUDIO_FORMAT_U18LE: 18 bits in 24 bits, unsigned, little endian
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* @GST_AUDIO_FORMAT_U18BE: 18 bits in 24 bits, unsigned, big endian
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* @GST_AUDIO_FORMAT_F32LE: 32-bit floating point samples, little endian
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* @GST_AUDIO_FORMAT_F32BE: 32-bit floating point samples, big endian
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* @GST_AUDIO_FORMAT_F64LE: 64-bit floating point samples, little endian
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* @GST_AUDIO_FORMAT_F64BE: 64-bit floating point samples, big endian
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* @GST_AUDIO_FORMAT_S16: 16 bits in 16 bits, signed, native endianness
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* @GST_AUDIO_FORMAT_U16: 16 bits in 16 bits, unsigned, native endianness
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* @GST_AUDIO_FORMAT_S24_32: 24 bits in 32 bits, signed, native endianness
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* @GST_AUDIO_FORMAT_U24_32: 24 bits in 32 bits, unsigned, native endianness
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* @GST_AUDIO_FORMAT_S32: 32 bits in 32 bits, signed, native endianness
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* @GST_AUDIO_FORMAT_U32: 32 bits in 32 bits, unsigned, native endianness
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* @GST_AUDIO_FORMAT_S24: 24 bits in 24 bits, signed, native endianness
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* @GST_AUDIO_FORMAT_U24: 24 bits in 24 bits, unsigned, native endianness
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* @GST_AUDIO_FORMAT_S20: 20 bits in 24 bits, signed, native endianness
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* @GST_AUDIO_FORMAT_U20: 20 bits in 24 bits, unsigned, native endianness
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* @GST_AUDIO_FORMAT_S18: 18 bits in 24 bits, signed, native endianness
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* @GST_AUDIO_FORMAT_U18: 18 bits in 24 bits, unsigned, native endianness
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* @GST_AUDIO_FORMAT_F32: 32-bit floating point samples, native endianness
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* @GST_AUDIO_FORMAT_F64: 64-bit floating point samples, native endianness
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*
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* Enum value describing the most common audio formats.
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*/
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typedef enum {
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GST_AUDIO_FORMAT_UNKNOWN,
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GST_AUDIO_FORMAT_ENCODED,
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/* 8 bit */
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GST_AUDIO_FORMAT_S8,
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GST_AUDIO_FORMAT_U8,
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/* 16 bit */
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GST_AUDIO_FORMAT_S16LE,
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GST_AUDIO_FORMAT_S16BE,
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GST_AUDIO_FORMAT_U16LE,
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GST_AUDIO_FORMAT_U16BE,
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/* 24 bit in low 3 bytes of 32 bits*/
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GST_AUDIO_FORMAT_S24_32LE,
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GST_AUDIO_FORMAT_S24_32BE,
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GST_AUDIO_FORMAT_U24_32LE,
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GST_AUDIO_FORMAT_U24_32BE,
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/* 32 bit */
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GST_AUDIO_FORMAT_S32LE,
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GST_AUDIO_FORMAT_S32BE,
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GST_AUDIO_FORMAT_U32LE,
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GST_AUDIO_FORMAT_U32BE,
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/* 24 bit in 3 bytes*/
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GST_AUDIO_FORMAT_S24LE,
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GST_AUDIO_FORMAT_S24BE,
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GST_AUDIO_FORMAT_U24LE,
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GST_AUDIO_FORMAT_U24BE,
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/* 20 bit in 3 bytes*/
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GST_AUDIO_FORMAT_S20LE,
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GST_AUDIO_FORMAT_S20BE,
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GST_AUDIO_FORMAT_U20LE,
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GST_AUDIO_FORMAT_U20BE,
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/* 18 bit in 3 bytes*/
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GST_AUDIO_FORMAT_S18LE,
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GST_AUDIO_FORMAT_S18BE,
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GST_AUDIO_FORMAT_U18LE,
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GST_AUDIO_FORMAT_U18BE,
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/* float */
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GST_AUDIO_FORMAT_F32LE,
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GST_AUDIO_FORMAT_F32BE,
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GST_AUDIO_FORMAT_F64LE,
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GST_AUDIO_FORMAT_F64BE,
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/* native endianness equivalents */
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GST_AUDIO_FORMAT_S16 = _GST_AUDIO_FORMAT_NE(S16),
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GST_AUDIO_FORMAT_U16 = _GST_AUDIO_FORMAT_NE(U16),
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GST_AUDIO_FORMAT_S24_32 = _GST_AUDIO_FORMAT_NE(S24_32),
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GST_AUDIO_FORMAT_U24_32 = _GST_AUDIO_FORMAT_NE(U24_32),
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GST_AUDIO_FORMAT_S32 = _GST_AUDIO_FORMAT_NE(S32),
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GST_AUDIO_FORMAT_U32 = _GST_AUDIO_FORMAT_NE(U32),
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GST_AUDIO_FORMAT_S24 = _GST_AUDIO_FORMAT_NE(S24),
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GST_AUDIO_FORMAT_U24 = _GST_AUDIO_FORMAT_NE(U24),
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GST_AUDIO_FORMAT_S20 = _GST_AUDIO_FORMAT_NE(S20),
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GST_AUDIO_FORMAT_U20 = _GST_AUDIO_FORMAT_NE(U20),
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GST_AUDIO_FORMAT_S18 = _GST_AUDIO_FORMAT_NE(S18),
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GST_AUDIO_FORMAT_U18 = _GST_AUDIO_FORMAT_NE(U18),
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GST_AUDIO_FORMAT_F32 = _GST_AUDIO_FORMAT_NE(F32),
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GST_AUDIO_FORMAT_F64 = _GST_AUDIO_FORMAT_NE(F64)
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} GstAudioFormat;
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typedef struct _GstAudioFormatInfo GstAudioFormatInfo;
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/**
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* GstAudioFormatFlags:
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* @GST_AUDIO_FORMAT_FLAG_INTEGER: integer samples
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* @GST_AUDIO_FORMAT_FLAG_FLOAT: float samples
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* @GST_AUDIO_FORMAT_FLAG_SIGNED: signed samples
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* @GST_AUDIO_FORMAT_FLAG_COMPLEX: complex layout
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* @GST_AUDIO_FORMAT_FLAG_UNPACK: the format can be used in
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* #GstAudioFormatUnpack and #GstAudioFormatPack functions
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*
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* The different audio flags that a format info can have.
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*/
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typedef enum
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{
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GST_AUDIO_FORMAT_FLAG_INTEGER = (1 << 0),
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GST_AUDIO_FORMAT_FLAG_FLOAT = (1 << 1),
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GST_AUDIO_FORMAT_FLAG_SIGNED = (1 << 2),
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GST_AUDIO_FORMAT_FLAG_COMPLEX = (1 << 4),
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GST_AUDIO_FORMAT_FLAG_UNPACK = (1 << 5)
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} GstAudioFormatFlags;
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/**
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* GstAudioPackFlags:
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* @GST_AUDIO_PACK_FLAG_NONE: No flag
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* @GST_AUDIO_PACK_FLAG_TRUNCATE_RANGE: When the source has a smaller depth
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* than the target format, set the least significant bits of the target
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* to 0. This is likely slightly faster but less accurate. When this flag
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* is not specified, the most significant bits of the source are duplicated
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* in the least significant bits of the destination.
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*
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* The different flags that can be used when packing and unpacking.
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*/
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typedef enum
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{
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GST_AUDIO_PACK_FLAG_NONE = 0,
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GST_AUDIO_PACK_FLAG_TRUNCATE_RANGE = (1 << 0)
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} GstAudioPackFlags;
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/**
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* GstAudioFormatUnpack:
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* @info: a #GstAudioFormatInfo
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* @flags: #GstAudioPackFlags
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* @dest: (array) (element-type guint8): a destination array
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* @data: (array) (element-type guint8): pointer to the audio data
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* @length: the amount of samples to unpack.
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*
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* Unpacks @length samples from the given data of format @info.
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* The samples will be unpacked into @dest which each channel
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* interleaved. @dest should at least be big enough to hold @length *
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* channels * size(unpack_format) bytes.
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*/
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typedef void (*GstAudioFormatUnpack) (const GstAudioFormatInfo *info,
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GstAudioPackFlags flags, gpointer dest,
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gconstpointer data, gint length);
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/**
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* GstAudioFormatPack:
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* @info: a #GstAudioFormatInfo
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* @flags: #GstAudioPackFlags
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* @src: (array) (element-type guint8): a source array
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* @data: (array) (element-type guint8): pointer to the destination
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* data
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* @length: the amount of samples to pack.
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*
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* Packs @length samples from @src to the data array in format @info.
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* The samples from source have each channel interleaved
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* and will be packed into @data.
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*/
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typedef void (*GstAudioFormatPack) (const GstAudioFormatInfo *info,
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GstAudioPackFlags flags, gconstpointer src,
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gpointer data, gint length);
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/**
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* GstAudioFormatInfo:
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* @format: #GstAudioFormat
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* @name: string representation of the format
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* @description: user readable description of the format
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* @flags: #GstAudioFormatFlags
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* @endianness: the endianness
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* @width: amount of bits used for one sample
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* @depth: amount of valid bits in @width
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* @silence: @width/8 bytes with 1 silent sample
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* @unpack_format: the format of the unpacked samples
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* @unpack_func: function to unpack samples
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* @pack_func: function to pack samples
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*
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* Information for an audio format.
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*/
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struct _GstAudioFormatInfo {
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/*< public >*/
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GstAudioFormat format;
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const gchar *name;
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const gchar *description;
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GstAudioFormatFlags flags;
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gint endianness;
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gint width;
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gint depth;
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guint8 silence[8];
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GstAudioFormat unpack_format;
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GstAudioFormatUnpack unpack_func;
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GstAudioFormatPack pack_func;
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/*< private >*/
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gpointer _gst_reserved[GST_PADDING];
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};
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GST_AUDIO_API
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GType gst_audio_format_info_get_type (void);
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#define GST_AUDIO_FORMAT_INFO_FORMAT(info) ((info)->format)
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#define GST_AUDIO_FORMAT_INFO_NAME(info) ((info)->name)
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#define GST_AUDIO_FORMAT_INFO_FLAGS(info) ((info)->flags)
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#define GST_AUDIO_FORMAT_INFO_IS_INTEGER(info) !!((info)->flags & GST_AUDIO_FORMAT_FLAG_INTEGER)
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#define GST_AUDIO_FORMAT_INFO_IS_FLOAT(info) !!((info)->flags & GST_AUDIO_FORMAT_FLAG_FLOAT)
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#define GST_AUDIO_FORMAT_INFO_IS_SIGNED(info) !!((info)->flags & GST_AUDIO_FORMAT_FLAG_SIGNED)
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#define GST_AUDIO_FORMAT_INFO_ENDIANNESS(info) ((info)->endianness)
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#define GST_AUDIO_FORMAT_INFO_IS_LITTLE_ENDIAN(info) ((info)->endianness == G_LITTLE_ENDIAN)
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#define GST_AUDIO_FORMAT_INFO_IS_BIG_ENDIAN(info) ((info)->endianness == G_BIG_ENDIAN)
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#define GST_AUDIO_FORMAT_INFO_WIDTH(info) ((info)->width)
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#define GST_AUDIO_FORMAT_INFO_DEPTH(info) ((info)->depth)
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GST_AUDIO_API
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GstAudioFormat gst_audio_format_build_integer (gboolean sign, gint endianness,
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gint width, gint depth) G_GNUC_CONST;
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GST_AUDIO_API
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GstAudioFormat gst_audio_format_from_string (const gchar *format) G_GNUC_CONST;
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GST_AUDIO_API
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const gchar * gst_audio_format_to_string (GstAudioFormat format) G_GNUC_CONST;
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GST_AUDIO_API
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const GstAudioFormatInfo *
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gst_audio_format_get_info (GstAudioFormat format) G_GNUC_CONST;
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GST_AUDIO_API
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void gst_audio_format_info_fill_silence (const GstAudioFormatInfo *info,
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gpointer dest, gsize length);
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GST_AUDIO_API G_DEPRECATED_FOR(gst_audio_format_info_fill_silence)
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void gst_audio_format_fill_silence (const GstAudioFormatInfo *info,
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gpointer dest, gsize length);
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/**
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* GST_AUDIO_RATE_RANGE:
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*
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* Maximum range of allowed sample rates, for use in template caps strings.
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*/
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#define GST_AUDIO_RATE_RANGE "(int) [ 1, max ]"
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/**
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* GST_AUDIO_CHANNELS_RANGE:
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*
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* Maximum range of allowed channels, for use in template caps strings.
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*/
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#define GST_AUDIO_CHANNELS_RANGE "(int) [ 1, max ]"
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/**
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* GST_AUDIO_NE:
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* @s: format string without endianness marker
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*
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* Turns audio format string @s into the format string for native endianness.
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*/
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/**
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* GST_AUDIO_OE:
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* @s: format string without endianness marker
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*
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* Turns audio format string @s into the format string for other endianness.
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*/
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#if G_BYTE_ORDER == G_LITTLE_ENDIAN
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# define GST_AUDIO_NE(s) G_STRINGIFY(s)"LE"
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# define GST_AUDIO_OE(s) G_STRINGIFY(s)"BE"
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#else
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# define GST_AUDIO_NE(s) G_STRINGIFY(s)"BE"
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# define GST_AUDIO_OE(s) G_STRINGIFY(s)"LE"
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#endif
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/**
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* GST_AUDIO_FORMATS_ALL:
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*
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* List of all audio formats, for use in template caps strings.
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*
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* Formats are sorted by decreasing "quality", using these criteria by priority:
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* - depth
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* - width
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* - Float > Signed > Unsigned
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* - native endianness preferred
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*/
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#if G_BYTE_ORDER == G_BIG_ENDIAN
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#define GST_AUDIO_FORMATS_ALL "{ F64BE, F64LE, " \
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"F32BE, F32LE, S32BE, S32LE, U32BE, U32LE, " \
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"S24_32BE, S24_32LE, U24_32BE, U24_32LE, " \
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"S24BE, S24LE, U24BE, U24LE, " \
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"S20BE, S20LE, U20BE, U20LE, " \
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"S18BE, S18LE, U18BE, U18LE, " \
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"S16BE, S16LE, U16BE, U16LE, " \
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"S8, U8 }"
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#elif G_BYTE_ORDER == G_LITTLE_ENDIAN
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#define GST_AUDIO_FORMATS_ALL "{ F64LE, F64BE, " \
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"F32LE, F32BE, S32LE, S32BE, U32LE, U32BE, " \
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"S24_32LE, S24_32BE, U24_32LE, U24_32BE, " \
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"S24LE, S24BE, U24LE, U24BE, " \
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"S20LE, S20BE, U20LE, U20BE, " \
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"S18LE, S18BE, U18LE, U18BE, " \
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"S16LE, S16BE, U16LE, U16BE, " \
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"S8, U8 }"
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#endif
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GST_AUDIO_API
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const GstAudioFormat * gst_audio_formats_raw (guint * len);
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/**
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* GST_AUDIO_CAPS_MAKE:
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* @format: string format that describes the sample layout, as string
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* (e.g. "S16LE", "S8", etc.)
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*
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* Generic caps string for audio, for use in pad templates.
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*/
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#define GST_AUDIO_CAPS_MAKE(format) \
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"audio/x-raw, " \
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"format = (string) " format ", " \
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"rate = " GST_AUDIO_RATE_RANGE ", " \
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"channels = " GST_AUDIO_CHANNELS_RANGE
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/**
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* GST_AUDIO_DEF_RATE:
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*
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* Standard sampling rate used in consumer audio.
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*/
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#define GST_AUDIO_DEF_RATE 44100
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/**
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* GST_AUDIO_DEF_CHANNELS:
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*
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* Standard number of channels used in consumer audio.
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*/
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#define GST_AUDIO_DEF_CHANNELS 2
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/**
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* GST_AUDIO_DEF_FORMAT:
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*
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* Standard format used in consumer audio.
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*/
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#define GST_AUDIO_DEF_FORMAT "S16LE"
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/**
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* GstAudioLayout:
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* @GST_AUDIO_LAYOUT_INTERLEAVED: interleaved audio
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* @GST_AUDIO_LAYOUT_NON_INTERLEAVED: non-interleaved audio
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*
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* Layout of the audio samples for the different channels.
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*/
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typedef enum {
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GST_AUDIO_LAYOUT_INTERLEAVED = 0,
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GST_AUDIO_LAYOUT_NON_INTERLEAVED
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} GstAudioLayout;
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GST_AUDIO_API
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GstCaps * gst_audio_make_raw_caps (const GstAudioFormat formats[], guint len,
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GstAudioLayout layout);
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G_END_DECLS
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#endif /* __GST_AUDIO_FORMAT_H__ */
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