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374d52d257
This queries port roles from the LV2 data and converts it into GStreamer channel positions. This should allow any type of multi-channel plugin (including beyond stereo, e.g. surround) to work fine in GStreamer, and with elements that require channel positions to be explicitly stated.
143 lines
4.6 KiB
C
143 lines
4.6 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2005 Wim Taymans <wim@fluendo.com>
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*
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* gstsignalprocessor.h:
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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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_SIGNAL_PROCESSOR_H__
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#define __GST_SIGNAL_PROCESSOR_H__
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#include <gst/gst.h>
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#include <gst/audio/multichannel.h>
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G_BEGIN_DECLS
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typedef enum
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{
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GST_SIGNAL_PROCESSOR_CLASS_FLAG_CAN_PROCESS_IN_PLACE = 1<<0
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} GstSignalProcessorClassFlags;
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#define GST_SIGNAL_PROCESSOR_CLASS_CAN_PROCESS_IN_PLACE(klass) \
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(GST_SIGNAL_PROCESSOR_CLASS (klass)->flags & \
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GST_SIGNAL_PROCESSOR_CLASS_FLAG_CAN_PROCESS_IN_PLACE)
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#define GST_SIGNAL_PROCESSOR_CLASS_SET_CAN_PROCESS_IN_PLACE(klass) \
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GST_SIGNAL_PROCESSOR_CLASS (klass)->flags |= \
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GST_SIGNAL_PROCESSOR_CLASS_FLAG_CAN_PROCESS_IN_PLACE
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typedef enum
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{
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GST_SIGNAL_PROCESSOR_STATE_NULL,
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GST_SIGNAL_PROCESSOR_STATE_INITIALIZED,
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GST_SIGNAL_PROCESSOR_STATE_RUNNING
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} GstSignalProcessorState;
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#define GST_TYPE_SIGNAL_PROCESSOR (gst_signal_processor_get_type())
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#define GST_SIGNAL_PROCESSOR(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_SIGNAL_PROCESSOR,GstSignalProcessor))
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#define GST_SIGNAL_PROCESSOR_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_SIGNAL_PROCESSOR,GstSignalProcessorClass))
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#define GST_SIGNAL_PROCESSOR_GET_CLASS(obj) \
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(G_TYPE_INSTANCE_GET_CLASS ((obj),GST_TYPE_SIGNAL_PROCESSOR,GstSignalProcessorClass))
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#define GST_IS_SIGNAL_PROCESSOR(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_SIGNAL_PROCESSOR))
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#define GST_IS_SIGNAL_PROCESSOR_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_SIGNAL_PROCESSOR))
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#define GST_SIGNAL_PROCESSOR_IS_INITIALIZED(obj) \
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(GST_SIGNAL_PROCESSOR (obj)->state >= GST_SIGNAL_PROCESSOR_STATE_INITIALIZED)
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#define GST_SIGNAL_PROCESSOR_IS_RUNNING(obj) \
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(GST_SIGNAL_PROCESSOR (obj)->state == GST_SIGNAL_PROCESSOR_STATE_RUNNING)
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typedef struct _GstSignalProcessorGroup GstSignalProcessorGroup;
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typedef struct _GstSignalProcessor GstSignalProcessor;
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typedef struct _GstSignalProcessorClass GstSignalProcessorClass;
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struct _GstSignalProcessorGroup {
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guint channels; /**< Number of channels in buffers */
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guint nframes; /**< Number of frames currently allocated per channel */
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gfloat *interleaved_buffer; /**< Interleaved buffer (c1c2c1c2...)*/
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gfloat *buffer; /**< De-interleaved buffer (c1c1...c2c2...) */
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};
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struct _GstSignalProcessor {
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GstElement element;
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GstCaps *caps;
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guint sample_rate;
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GstSignalProcessorState state;
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GstFlowReturn flow_state;
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GstActivateMode mode;
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/* pending inputs before processing can take place */
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guint pending_in;
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/* pending outputs to be filled */
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guint pending_out;
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/* multi-channel signal pads */
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GstSignalProcessorGroup *group_in;
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GstSignalProcessorGroup *group_out;
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/* single channel signal pads */
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gfloat **audio_in;
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gfloat **audio_out;
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/* controls */
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gfloat *control_in;
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gfloat *control_out;
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};
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struct _GstSignalProcessorClass {
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GstElementClass parent_class;
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/*< public >*/
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guint num_group_in;
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guint num_group_out;
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guint num_audio_in;
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guint num_audio_out;
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guint num_control_in;
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guint num_control_out;
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guint flags;
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/* virtual methods for subclasses */
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gboolean (*setup) (GstSignalProcessor *self, guint sample_rate);
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gboolean (*start) (GstSignalProcessor *self);
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void (*stop) (GstSignalProcessor *self);
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void (*cleanup) (GstSignalProcessor *self);
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void (*process) (GstSignalProcessor *self, guint num_frames);
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gboolean (*event) (GstSignalProcessor *self, GstEvent *event);
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};
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GType gst_signal_processor_get_type (void);
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void gst_signal_processor_class_add_pad_template (GstSignalProcessorClass *klass,
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const gchar *name, GstPadDirection direction, guint index, guint channels,
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const GstAudioChannelPosition *pos);
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G_END_DECLS
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#endif /* __GST_SIGNAL_PROCESSOR_H__ */
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