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