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In fit-down mode only 1.0 rates are supported, and the element will fit audio data in buffers to their advertised duration. This is useful in speech synthesis cases, where elements such as awspolly will generate audio data from text, and assign the duration of the input text buffers to their output buffers Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/8149>
116 lines
3.3 KiB
C
116 lines
3.3 KiB
C
/*
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* GStreamer
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* Copyright (C) 2008 Rov Juvano <rovjuvano@users.sourceforge.net>
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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_SCALETEMPO_H__
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#define __GST_SCALETEMPO_H__
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#include <gst/gst.h>
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#include <gst/base/gstbasetransform.h>
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G_BEGIN_DECLS
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#define GST_TYPE_SCALETEMPO (gst_scaletempo_get_type())
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#define GST_SCALETEMPO(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj), GST_TYPE_SCALETEMPO, GstScaletempo))
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#define GST_SCALETEMPO_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass), GST_TYPE_SCALETEMPO, GstScaletempoClass))
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#define GST_IS_SCALETEMPO(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_SCALETEMPO))
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#define GST_IS_SCALETEMPO_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass), GST_TYPE_SCALETEMPO))
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typedef struct _GstScaletempo GstScaletempo;
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typedef struct _GstScaletempoClass GstScaletempoClass;
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typedef struct _GstScaletempoPrivate GstScaletempoPrivate;
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/**
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* GstScaletempoMode:
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* @GST_SCALETEMPO_MODE_NONE: scale according to segment rate
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* @GST_SCALETEMPO_MODE_FIT_DOWN: fit audio data to buffer duration, only supported with rate == 1.0
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*
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* Possible values for the GstScaletempo:mode property.
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*
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* Since: 1.26
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*/
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typedef enum {
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GST_SCALETEMPO_MODE_NONE = 0,
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GST_SCALETEMPO_MODE_FIT_DOWN = (1 << 0),
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} GstScaletempoMode;
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struct _GstScaletempo
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{
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GstBaseTransform element;
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gdouble scale;
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gboolean reverse;
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/* parameters */
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guint ms_stride;
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gdouble percent_overlap;
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guint ms_search;
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GstScaletempoMode mode;
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/* caps */
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GstAudioFormat format;
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guint samples_per_frame; /* AKA number of channels */
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guint bytes_per_sample;
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guint bytes_per_frame;
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guint sample_rate;
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/* stride */
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gdouble frames_stride_scaled;
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gdouble frames_stride_error;
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guint bytes_stride;
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gdouble bytes_stride_scaled;
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guint bytes_queue_max;
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guint bytes_queued;
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guint bytes_to_slide;
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gint8 *buf_queue;
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/* overlap */
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guint samples_overlap;
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guint samples_standing;
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guint bytes_overlap;
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guint bytes_standing;
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gpointer buf_overlap;
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gpointer table_blend;
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void (*output_overlap) (GstScaletempo * scaletempo, gpointer out_buf, guint bytes_off);
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/* best overlap */
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guint frames_search;
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gpointer buf_pre_corr;
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gpointer table_window;
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guint (*best_overlap_offset) (GstScaletempo * scaletempo);
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/* gstreamer */
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GstSegment in_segment, out_segment;
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GstClockTime latency;
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/* threads */
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gboolean reinit_buffers;
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};
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struct _GstScaletempoClass
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{
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GstBaseTransformClass parent_class;
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};
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GType gst_scaletempo_get_type (void);
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GST_ELEMENT_REGISTER_DECLARE (scaletempo);
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G_END_DECLS
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#endif /* __GST_SCALETEMPO_H__ */
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