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/* GStreamer
* Copyright (C) <2016> Carlos Rafael Giani <dv at pseudoterminal dot 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_RAW_AUDIO_PARSE_H__
#define __GST_RAW_AUDIO_PARSE_H__
#include <gst/gst.h>
#include <gst/audio/audio.h>
#include "gstrawbaseparse.h"
G_BEGIN_DECLS
#define GST_TYPE_RAW_AUDIO_PARSE \
(gst_raw_audio_parse_get_type())
#define GST_RAW_AUDIO_PARSE(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj), GST_TYPE_RAW_AUDIO_PARSE, GstRawAudioParse))
#define GST_RAW_AUDIO_PARSE_CAST(obj) \
((GstRawAudioParse *)(obj))
#define GST_RAW_AUDIO_PARSE_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass), GST_TYPE_RAW_AUDIO_PARSE, GstRawAudioParseClass))
#define GST_IS_RAW_AUDIO_PARSE(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_RAW_AUDIO_PARSE))
#define GST_IS_RAW_AUDIO_PARSE_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass), GST_TYPE_RAW_AUDIO_PARSE))
typedef enum _GstRawAudioParseFormat GstRawAudioParseFormat;
typedef struct _GstRawAudioParseConfig GstRawAudioParseConfig;
typedef struct _GstRawAudioParse GstRawAudioParse;
typedef struct _GstRawAudioParseClass GstRawAudioParseClass;
enum _GstRawAudioParseFormat
{
GST_RAW_AUDIO_PARSE_FORMAT_PCM,
GST_RAW_AUDIO_PARSE_FORMAT_MULAW,
GST_RAW_AUDIO_PARSE_FORMAT_ALAW
};
/* Contains information about the sample rate, format, and channel count to use. */
struct _GstRawAudioParseConfig
{
/* If TRUE, then this configuration is ready to use */
gboolean ready;
/* Format of the configuration. Can be PCM, a-law, mu-law. */
GstRawAudioParseFormat format;
/* If format is set to PCM, this specifies the exact PCM format in use.
* Meaningless if format is set to anything other than PCM. */
GstAudioFormat pcm_format;
/* Bytes per frame. Calculated as: bpf = bytes_per_sample * num_channels
* Must be nonzero. This is the size of one frame, the value returned
* by the GstRawBaseParseClass get_config_frame_size() vfunc. */
guint bpf;
/* Sample rate in Hz - must be nonzero */
guint sample_rate;
/* Number of channels - must be nonzero */
guint num_channels;
/* TRUE if the data is interleaved, FALSE otherwise */
gboolean interleaved;
/* Array of channel positions, one position per channel; its first
* num_channels values are valid. They are computed out of the number
* of channels if no positions are explicitely given. */
GstAudioChannelPosition channel_positions[64];
/* If the channel_positions are in a valid GStreamer channel order, then
* this is not used, and needs_channel_reordering is FALSE. Otherwise,
* this contains the same positions as in channel_positions, but in the
* order GStreamer expects. needs_channel_reordering will be TRUE in that
* case. This is used for reordering samples in outgoing buffers if
* necessary. */
GstAudioChannelPosition reordered_channel_positions[64];
/* TRUE if channel reordering is necessary, FALSE otherwise. See above
* for details. */
gboolean needs_channel_reordering;
};
struct _GstRawAudioParse
{
GstRawBaseParse parent;
/*< private > */
/* Configuration controlled by the object properties. Its ready value
* is set to TRUE from the start, so it can be used right away.
*/
GstRawAudioParseConfig properties_config;
/* Configuration controlled by the sink caps. Its ready value is
* initially set to FALSE until valid sink caps come in. It is set to
* FALSE again when the stream-start event is observed.
*/
GstRawAudioParseConfig sink_caps_config;
/* Currently active configuration. Points either to properties_config
* or to sink_caps_config. This is never NULL. */
GstRawAudioParseConfig *current_config;
};
struct _GstRawAudioParseClass
{
GstRawBaseParseClass parent_class;
};
GType gst_raw_audio_parse_get_type (void);
GType gst_raw_audio_parse_format_get_type (void);
G_END_DECLS
#endif
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