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