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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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1586 lines
40 KiB
C
1586 lines
40 KiB
C
/* GStreamer
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* Copyright (C) <2014> 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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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <string.h>
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#include <stdio.h>
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#include <math.h>
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/**
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* SECTION:gstvideoscaler
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* @title: GstVideoScaler
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* @short_description: Utility object for rescaling video frames
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*
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* #GstVideoScaler is a utility object for rescaling and resampling
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* video frames using various interpolation / sampling methods.
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*
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*/
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#ifndef DISABLE_ORC
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#include <orc/orcfunctions.h>
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#else
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#define orc_memcpy memcpy
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#endif
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#include "video-orc.h"
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#include "video-scaler.h"
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#ifndef GST_DISABLE_GST_DEBUG
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#define GST_CAT_DEFAULT ensure_debug_category()
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static GstDebugCategory *
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ensure_debug_category (void)
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{
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static gsize cat_gonce = 0;
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if (g_once_init_enter (&cat_gonce)) {
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gsize cat_done;
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cat_done = (gsize) _gst_debug_category_new ("video-scaler", 0,
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"video-scaler object");
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g_once_init_leave (&cat_gonce, cat_done);
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}
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return (GstDebugCategory *) cat_gonce;
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}
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#else
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#define ensure_debug_category() /* NOOP */
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#endif /* GST_DISABLE_GST_DEBUG */
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#define SCALE_U8 12
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#define SCALE_U8_ROUND (1 << (SCALE_U8 -1))
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#define SCALE_U8_LQ 6
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#define SCALE_U8_LQ_ROUND (1 << (SCALE_U8_LQ -1))
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#define SCALE_U16 12
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#define SCALE_U16_ROUND (1 << (SCALE_U16 -1))
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#define LQ
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typedef void (*GstVideoScalerHFunc) (GstVideoScaler * scale,
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gpointer src, gpointer dest, guint dest_offset, guint width, guint n_elems);
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typedef void (*GstVideoScalerVFunc) (GstVideoScaler * scale,
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gpointer srcs[], gpointer dest, guint dest_offset, guint width,
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guint n_elems);
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struct _GstVideoScaler
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{
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GstVideoResamplerMethod method;
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GstVideoScalerFlags flags;
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GstVideoResampler resampler;
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gboolean merged;
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gint in_y_offset;
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gint out_y_offset;
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/* cached integer coefficients */
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gint16 *taps_s16;
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gint16 *taps_s16_4;
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guint32 *offset_n;
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/* for ORC */
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gint inc;
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gint tmpwidth;
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gpointer tmpline1;
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gpointer tmpline2;
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};
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static void
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resampler_zip (GstVideoResampler * resampler, const GstVideoResampler * r1,
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const GstVideoResampler * r2)
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{
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guint i, out_size, max_taps, n_phases;
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gdouble *taps;
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guint32 *offset, *phase;
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g_return_if_fail (r1->max_taps == r2->max_taps);
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out_size = r1->out_size + r2->out_size;
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max_taps = r1->max_taps;
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n_phases = out_size;
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offset = g_malloc (sizeof (guint32) * out_size);
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phase = g_malloc (sizeof (guint32) * n_phases);
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taps = g_malloc (sizeof (gdouble) * max_taps * n_phases);
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resampler->in_size = r1->in_size + r2->in_size;
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resampler->out_size = out_size;
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resampler->max_taps = max_taps;
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resampler->n_phases = n_phases;
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resampler->offset = offset;
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resampler->phase = phase;
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resampler->n_taps = g_malloc (sizeof (guint32) * out_size);
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resampler->taps = taps;
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for (i = 0; i < out_size; i++) {
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guint idx = i / 2;
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const GstVideoResampler *r;
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r = (i & 1) ? r2 : r1;
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offset[i] = r->offset[idx] * 2 + (i & 1);
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phase[i] = i;
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memcpy (taps + i * max_taps, r->taps + r->phase[idx] * max_taps,
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max_taps * sizeof (gdouble));
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}
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}
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static void
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realloc_tmplines (GstVideoScaler * scale, gint n_elems, gint width)
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{
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scale->tmpline1 =
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g_realloc (scale->tmpline1,
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sizeof (gint32) * width * n_elems * scale->resampler.max_taps);
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scale->tmpline2 =
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g_realloc (scale->tmpline2, sizeof (gint32) * width * n_elems);
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scale->tmpwidth = width;
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}
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static void
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scaler_dump (GstVideoScaler * scale)
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{
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#if 0
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gint i, j, in_size, out_size, max_taps;
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guint32 *offset, *phase;
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gdouble *taps;
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GstVideoResampler *r = &scale->resampler;
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in_size = r->in_size;
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out_size = r->out_size;
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offset = r->offset;
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phase = r->phase;
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max_taps = r->max_taps;
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taps = r->taps;
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g_print ("in %d, out %d, max_taps %d, n_phases %d\n", in_size, out_size,
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max_taps, r->n_phases);
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for (i = 0; i < out_size; i++) {
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g_print ("%d: \t%d \t%d:", i, offset[i], phase[i]);
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for (j = 0; j < max_taps; j++) {
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g_print ("\t%f", taps[i * max_taps + j]);
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}
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g_print ("\n");
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}
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#endif
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}
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#define INTERLACE_SHIFT 0.5
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/**
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* gst_video_scaler_new: (skip)
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* @method: a #GstVideoResamplerMethod
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* @flags: #GstVideoScalerFlags
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* @n_taps: number of taps to use
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* @in_size: number of source elements
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* @out_size: number of destination elements
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* @options: (allow-none): extra options
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*
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* Make a new @method video scaler. @in_size source lines/pixels will
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* be scaled to @out_size destination lines/pixels.
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*
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* @n_taps specifies the amount of pixels to use from the source for one output
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* pixel. If n_taps is 0, this function chooses a good value automatically based
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* on the @method and @in_size/@out_size.
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*
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* Returns: a #GstVideoScaler
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*/
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GstVideoScaler *
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gst_video_scaler_new (GstVideoResamplerMethod method, GstVideoScalerFlags flags,
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guint n_taps, guint in_size, guint out_size, GstStructure * options)
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{
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GstVideoScaler *scale;
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g_return_val_if_fail (in_size != 0, NULL);
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g_return_val_if_fail (out_size != 0, NULL);
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scale = g_slice_new0 (GstVideoScaler);
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GST_DEBUG ("%d %u %u->%u", method, n_taps, in_size, out_size);
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scale->method = method;
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scale->flags = flags;
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if (flags & GST_VIDEO_SCALER_FLAG_INTERLACED) {
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GstVideoResampler tresamp, bresamp;
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gdouble shift;
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shift = (INTERLACE_SHIFT * out_size) / in_size;
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gst_video_resampler_init (&tresamp, method,
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GST_VIDEO_RESAMPLER_FLAG_HALF_TAPS, (out_size + 1) / 2, n_taps, shift,
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(in_size + 1) / 2, (out_size + 1) / 2, options);
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n_taps = tresamp.max_taps;
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gst_video_resampler_init (&bresamp, method, 0, out_size - tresamp.out_size,
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n_taps, -shift, in_size - tresamp.in_size,
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out_size - tresamp.out_size, options);
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resampler_zip (&scale->resampler, &tresamp, &bresamp);
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gst_video_resampler_clear (&tresamp);
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gst_video_resampler_clear (&bresamp);
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} else {
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gst_video_resampler_init (&scale->resampler, method,
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GST_VIDEO_RESAMPLER_FLAG_NONE, out_size, n_taps, 0.0, in_size, out_size,
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options);
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}
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if (out_size == 1)
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scale->inc = 0;
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else
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scale->inc = ((in_size - 1) << 16) / (out_size - 1) - 1;
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scaler_dump (scale);
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GST_DEBUG ("max_taps %d", scale->resampler.max_taps);
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return scale;
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}
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/**
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* gst_video_scaler_free:
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* @scale: a #GstVideoScaler
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*
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* Free a previously allocated #GstVideoScaler @scale.
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*/
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void
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gst_video_scaler_free (GstVideoScaler * scale)
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{
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g_return_if_fail (scale != NULL);
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gst_video_resampler_clear (&scale->resampler);
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g_free (scale->taps_s16);
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g_free (scale->taps_s16_4);
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g_free (scale->offset_n);
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g_free (scale->tmpline1);
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g_free (scale->tmpline2);
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g_slice_free (GstVideoScaler, scale);
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}
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/**
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* gst_video_scaler_get_max_taps:
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* @scale: a #GstVideoScaler
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*
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* Get the maximum number of taps for @scale.
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*
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* Returns: the maximum number of taps
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*/
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guint
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gst_video_scaler_get_max_taps (GstVideoScaler * scale)
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{
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g_return_val_if_fail (scale != NULL, 0);
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return scale->resampler.max_taps;
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}
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/**
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* gst_video_scaler_get_coeff:
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* @scale: a #GstVideoScaler
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* @out_offset: an output offset
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* @in_offset: result input offset
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* @n_taps: result n_taps
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*
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* For a given pixel at @out_offset, get the first required input pixel at
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* @in_offset and the @n_taps filter coefficients.
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*
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* Note that for interlaced content, @in_offset needs to be incremented with
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* 2 to get the next input line.
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*
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* Returns: an array of @n_tap gdouble values with filter coefficients.
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*/
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const gdouble *
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gst_video_scaler_get_coeff (GstVideoScaler * scale,
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guint out_offset, guint * in_offset, guint * n_taps)
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{
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guint offset, phase;
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g_return_val_if_fail (scale != NULL, NULL);
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g_return_val_if_fail (out_offset < scale->resampler.out_size, NULL);
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offset = scale->resampler.offset[out_offset];
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phase = scale->resampler.phase[out_offset];
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if (in_offset)
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*in_offset = offset;
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if (n_taps) {
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*n_taps = scale->resampler.max_taps;
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if (scale->flags & GST_VIDEO_SCALER_FLAG_INTERLACED)
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*n_taps *= 2;
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}
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return scale->resampler.taps + phase * scale->resampler.max_taps;
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}
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static gboolean
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resampler_convert_coeff (const gdouble * src,
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gpointer dest, guint n, guint bits, guint precision)
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{
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gdouble multiplier;
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gint i, j;
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gdouble offset, l_offset, h_offset;
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gboolean exact = FALSE;
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multiplier = (1 << precision);
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/* Round to integer, but with an adjustable bias that we use to
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* eliminate the DC error. */
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l_offset = 0.0;
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h_offset = 1.0;
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offset = 0.5;
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for (i = 0; i < 64; i++) {
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gint sum = 0;
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for (j = 0; j < n; j++) {
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gint16 tap = floor (offset + src[j] * multiplier);
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((gint16 *) dest)[j] = tap;
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sum += tap;
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}
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if (sum == (1 << precision)) {
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exact = TRUE;
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break;
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}
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if (l_offset == h_offset)
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break;
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if (sum < (1 << precision)) {
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if (offset > l_offset)
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l_offset = offset;
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offset += (h_offset - l_offset) / 2;
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} else {
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if (offset < h_offset)
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h_offset = offset;
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offset -= (h_offset - l_offset) / 2;
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}
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}
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if (!exact)
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GST_WARNING ("can't find exact taps");
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return exact;
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}
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static void
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make_s16_taps (GstVideoScaler * scale, gint n_elems, gint precision)
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{
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gint i, j, max_taps, n_phases, out_size, src_inc;
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gint16 *taps_s16, *taps_s16_4;
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gdouble *taps;
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guint32 *phase, *offset, *offset_n;
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n_phases = scale->resampler.n_phases;
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max_taps = scale->resampler.max_taps;
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taps = scale->resampler.taps;
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taps_s16 = scale->taps_s16 = g_malloc (sizeof (gint16) * n_phases * max_taps);
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for (i = 0; i < n_phases; i++) {
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resampler_convert_coeff (taps, taps_s16, max_taps, 16, precision);
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taps += max_taps;
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taps_s16 += max_taps;
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}
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out_size = scale->resampler.out_size;
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taps_s16 = scale->taps_s16;
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phase = scale->resampler.phase;
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offset = scale->resampler.offset;
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taps_s16_4 = scale->taps_s16_4 =
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g_malloc (sizeof (gint16) * out_size * max_taps * 4);
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offset_n = scale->offset_n =
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g_malloc (sizeof (guint32) * out_size * max_taps);
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if (scale->flags & GST_VIDEO_SCALER_FLAG_INTERLACED)
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src_inc = 2;
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else
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src_inc = 1;
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for (j = 0; j < max_taps; j++) {
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for (i = 0; i < out_size; i++) {
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gint16 tap;
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if (scale->merged) {
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if ((i & 1) == scale->out_y_offset)
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offset_n[j * out_size + i] = offset[i] + (2 * j);
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else
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offset_n[j * out_size + i] = offset[i] + (4 * j);
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} else {
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offset_n[j * out_size + i] = offset[i] + j * src_inc;
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}
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tap = taps_s16[phase[i] * max_taps + j];
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taps_s16_4[(j * out_size + i) * n_elems + 0] = tap;
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if (n_elems > 1)
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taps_s16_4[(j * out_size + i) * n_elems + 1] = tap;
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if (n_elems > 2)
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taps_s16_4[(j * out_size + i) * n_elems + 2] = tap;
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if (n_elems > 3)
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taps_s16_4[(j * out_size + i) * n_elems + 3] = tap;
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}
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}
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}
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#undef ACC_SCALE
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static void
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video_scale_h_near_u8 (GstVideoScaler * scale,
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gpointer src, gpointer dest, guint dest_offset, guint width, guint n_elems)
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{
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guint8 *s, *d;
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gint i;
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d = (guint8 *) dest + dest_offset;
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s = (guint8 *) src;
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{
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#ifndef ACC_SCALE
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guint32 *offset = scale->resampler.offset + dest_offset;
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for (i = 0; i < width; i++)
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d[i] = s[offset[i]];
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#else
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gint acc = 0;
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for (i = 0; i < width; i++) {
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gint j = (acc + 0x8000) >> 16;
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d[i] = s[j];
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acc += scale->inc;
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}
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#endif
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}
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}
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static void
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video_scale_h_near_3u8 (GstVideoScaler * scale,
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gpointer src, gpointer dest, guint dest_offset, guint width, guint n_elems)
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{
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guint8 *s, *d;
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gint i;
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d = (guint8 *) dest + dest_offset;
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s = (guint8 *) src;
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{
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#ifndef ACC_SCALE
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guint32 *offset = scale->resampler.offset + dest_offset;
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for (i = 0; i < width; i++) {
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gint j = offset[i] * 3;
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d[i * 3 + 0] = s[j + 0];
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d[i * 3 + 1] = s[j + 1];
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d[i * 3 + 2] = s[j + 2];
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}
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#else
|
|
gint acc = 0;
|
|
|
|
for (i = 0; i < width; i++) {
|
|
gint j = ((acc + 0x8000) >> 16) * 3;
|
|
|
|
d[i * 3 + 0] = s[j + 0];
|
|
d[i * 3 + 1] = s[j + 1];
|
|
d[i * 3 + 2] = s[j + 2];
|
|
acc += scale->inc;
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
|
|
static void
|
|
video_scale_h_near_u16 (GstVideoScaler * scale,
|
|
gpointer src, gpointer dest, guint dest_offset, guint width, guint n_elems)
|
|
{
|
|
guint16 *s, *d;
|
|
gint i;
|
|
|
|
d = (guint16 *) dest + dest_offset;
|
|
s = (guint16 *) src;
|
|
|
|
{
|
|
#ifndef ACC_SCALE
|
|
guint32 *offset = scale->resampler.offset + dest_offset;
|
|
|
|
for (i = 0; i < width; i++)
|
|
d[i] = s[offset[i]];
|
|
#else
|
|
gint acc = 0;
|
|
|
|
for (i = 0; i < width; i++) {
|
|
gint j = (acc + 0x8000) >> 16;
|
|
d[i] = s[j];
|
|
acc += scale->inc;
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
|
|
static void
|
|
video_scale_h_near_u32 (GstVideoScaler * scale,
|
|
gpointer src, gpointer dest, guint dest_offset, guint width, guint n_elems)
|
|
{
|
|
guint32 *s, *d;
|
|
|
|
d = (guint32 *) dest + dest_offset;
|
|
s = (guint32 *) src;
|
|
|
|
#if 0
|
|
/* ORC is slower on this */
|
|
video_orc_resample_h_near_u32_lq (d, s, 0, scale->inc, width);
|
|
#elif 0
|
|
video_orc_resample_h_near_u32 (d, s, offset, width);
|
|
#else
|
|
{
|
|
gint i;
|
|
#ifndef ACC_SCALE
|
|
guint32 *offset = scale->resampler.offset + dest_offset;
|
|
|
|
for (i = 0; i < width; i++)
|
|
d[i] = s[offset[i]];
|
|
#else
|
|
gint acc = 0;
|
|
|
|
for (i = 0; i < width; i++) {
|
|
gint j = (acc + 0x8000) >> 16;
|
|
d[i] = s[j];
|
|
acc += scale->inc;
|
|
}
|
|
#endif
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
video_scale_h_near_u64 (GstVideoScaler * scale,
|
|
gpointer src, gpointer dest, guint dest_offset, guint width, guint n_elems)
|
|
{
|
|
guint64 *s, *d;
|
|
gint i;
|
|
guint32 *offset;
|
|
|
|
d = (guint64 *) dest + dest_offset;
|
|
s = (guint64 *) src;
|
|
|
|
offset = scale->resampler.offset + dest_offset;
|
|
for (i = 0; i < width; i++)
|
|
d[i] = s[offset[i]];
|
|
}
|
|
|
|
static void
|
|
video_scale_h_2tap_1u8 (GstVideoScaler * scale,
|
|
gpointer src, gpointer dest, guint dest_offset, guint width, guint n_elems)
|
|
{
|
|
guint8 *s, *d;
|
|
|
|
d = (guint8 *) dest + dest_offset;
|
|
s = (guint8 *) src;
|
|
|
|
video_orc_resample_h_2tap_1u8_lq (d, s, 0, scale->inc, width);
|
|
}
|
|
|
|
static void
|
|
video_scale_h_2tap_4u8 (GstVideoScaler * scale,
|
|
gpointer src, gpointer dest, guint dest_offset, guint width, guint n_elems)
|
|
{
|
|
guint32 *s, *d;
|
|
|
|
d = (guint32 *) dest + dest_offset;
|
|
s = (guint32 *) src;
|
|
|
|
video_orc_resample_h_2tap_4u8_lq (d, s, 0, scale->inc, width);
|
|
}
|
|
|
|
static void
|
|
video_scale_h_ntap_u8 (GstVideoScaler * scale,
|
|
gpointer src, gpointer dest, guint dest_offset, guint width, guint n_elems)
|
|
{
|
|
gint16 *taps;
|
|
gint i, max_taps, count;
|
|
gpointer d;
|
|
guint32 *offset_n;
|
|
guint8 *pixels;
|
|
gint16 *temp;
|
|
|
|
if (scale->taps_s16 == NULL)
|
|
#ifdef LQ
|
|
make_s16_taps (scale, n_elems, SCALE_U8_LQ);
|
|
#else
|
|
make_s16_taps (scale, n_elems, SCALE_U8);
|
|
#endif
|
|
|
|
max_taps = scale->resampler.max_taps;
|
|
offset_n = scale->offset_n;
|
|
|
|
pixels = (guint8 *) scale->tmpline1;
|
|
|
|
/* prepare the arrays */
|
|
count = width * max_taps;
|
|
switch (n_elems) {
|
|
case 1:
|
|
{
|
|
guint8 *s = (guint8 *) src;
|
|
|
|
for (i = 0; i < count; i++)
|
|
pixels[i] = s[offset_n[i]];
|
|
|
|
d = (guint8 *) dest + dest_offset;
|
|
break;
|
|
}
|
|
case 2:
|
|
{
|
|
guint16 *p16 = (guint16 *) pixels;
|
|
guint16 *s = (guint16 *) src;
|
|
|
|
for (i = 0; i < count; i++)
|
|
p16[i] = s[offset_n[i]];
|
|
|
|
d = (guint16 *) dest + dest_offset;
|
|
break;
|
|
}
|
|
case 3:
|
|
{
|
|
guint8 *s = (guint8 *) src;
|
|
|
|
for (i = 0; i < count; i++) {
|
|
gint j = offset_n[i] * 3;
|
|
pixels[i * 3 + 0] = s[j + 0];
|
|
pixels[i * 3 + 1] = s[j + 1];
|
|
pixels[i * 3 + 2] = s[j + 2];
|
|
}
|
|
d = (guint8 *) dest + dest_offset * 3;
|
|
break;
|
|
}
|
|
case 4:
|
|
{
|
|
guint32 *p32 = (guint32 *) pixels;
|
|
guint32 *s = (guint32 *) src;
|
|
#if 0
|
|
video_orc_resample_h_near_u32 (p32, s, offset_n, count);
|
|
#else
|
|
for (i = 0; i < count; i++)
|
|
p32[i] = s[offset_n[i]];
|
|
#endif
|
|
d = (guint32 *) dest + dest_offset;
|
|
break;
|
|
}
|
|
default:
|
|
return;
|
|
}
|
|
temp = (gint16 *) scale->tmpline2;
|
|
taps = scale->taps_s16_4;
|
|
count = width * n_elems;
|
|
|
|
#ifdef LQ
|
|
if (max_taps == 2) {
|
|
video_orc_resample_h_2tap_u8_lq (d, pixels, pixels + count, taps,
|
|
taps + count, count);
|
|
} else {
|
|
/* first pixels with first tap to temp */
|
|
if (max_taps >= 3) {
|
|
video_orc_resample_h_multaps3_u8_lq (temp, pixels, pixels + count,
|
|
pixels + count * 2, taps, taps + count, taps + count * 2, count);
|
|
max_taps -= 3;
|
|
pixels += count * 3;
|
|
taps += count * 3;
|
|
} else {
|
|
gint first = max_taps % 3;
|
|
|
|
video_orc_resample_h_multaps_u8_lq (temp, pixels, taps, count);
|
|
video_orc_resample_h_muladdtaps_u8_lq (temp, 0, pixels + count, count,
|
|
taps + count, count * 2, count, first - 1);
|
|
max_taps -= first;
|
|
pixels += count * first;
|
|
taps += count * first;
|
|
}
|
|
while (max_taps > 3) {
|
|
if (max_taps >= 6) {
|
|
video_orc_resample_h_muladdtaps3_u8_lq (temp, pixels, pixels + count,
|
|
pixels + count * 2, taps, taps + count, taps + count * 2, count);
|
|
max_taps -= 3;
|
|
pixels += count * 3;
|
|
taps += count * 3;
|
|
} else {
|
|
video_orc_resample_h_muladdtaps_u8_lq (temp, 0, pixels, count,
|
|
taps, count * 2, count, max_taps - 3);
|
|
pixels += count * (max_taps - 3);
|
|
taps += count * (max_taps - 3);
|
|
max_taps = 3;
|
|
}
|
|
}
|
|
if (max_taps == 3) {
|
|
video_orc_resample_h_muladdscaletaps3_u8_lq (d, pixels, pixels + count,
|
|
pixels + count * 2, taps, taps + count, taps + count * 2, temp,
|
|
count);
|
|
} else {
|
|
if (max_taps) {
|
|
/* add other pixels with other taps to t4 */
|
|
video_orc_resample_h_muladdtaps_u8_lq (temp, 0, pixels, count,
|
|
taps, count * 2, count, max_taps);
|
|
}
|
|
/* scale and write final result */
|
|
video_orc_resample_scaletaps_u8_lq (d, temp, count);
|
|
}
|
|
}
|
|
#else
|
|
/* first pixels with first tap to t4 */
|
|
video_orc_resample_h_multaps_u8 (temp, pixels, taps, count);
|
|
/* add other pixels with other taps to t4 */
|
|
video_orc_resample_h_muladdtaps_u8 (temp, 0, pixels + count, count,
|
|
taps + count, count * 2, count, max_taps - 1);
|
|
/* scale and write final result */
|
|
video_orc_resample_scaletaps_u8 (d, temp, count);
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
video_scale_h_ntap_u16 (GstVideoScaler * scale,
|
|
gpointer src, gpointer dest, guint dest_offset, guint width, guint n_elems)
|
|
{
|
|
gint16 *taps;
|
|
gint i, max_taps, count;
|
|
gpointer d;
|
|
guint32 *offset_n;
|
|
guint16 *pixels;
|
|
gint32 *temp;
|
|
|
|
if (scale->taps_s16 == NULL)
|
|
make_s16_taps (scale, n_elems, SCALE_U16);
|
|
|
|
max_taps = scale->resampler.max_taps;
|
|
offset_n = scale->offset_n;
|
|
|
|
pixels = (guint16 *) scale->tmpline1;
|
|
/* prepare the arrays FIXME, we can add this into ORC */
|
|
count = width * max_taps;
|
|
switch (n_elems) {
|
|
case 1:
|
|
{
|
|
guint16 *s = (guint16 *) src;
|
|
|
|
for (i = 0; i < count; i++)
|
|
pixels[i] = s[offset_n[i]];
|
|
|
|
d = (guint16 *) dest + dest_offset;
|
|
break;
|
|
}
|
|
case 4:
|
|
{
|
|
guint64 *p64 = (guint64 *) pixels;
|
|
guint64 *s = (guint64 *) src;
|
|
#if 0
|
|
video_orc_resample_h_near_u32 (p32, s, offset_n, count);
|
|
#else
|
|
for (i = 0; i < count; i++)
|
|
p64[i] = s[offset_n[i]];
|
|
#endif
|
|
d = (guint64 *) dest + dest_offset;
|
|
break;
|
|
}
|
|
default:
|
|
return;
|
|
}
|
|
|
|
temp = (gint32 *) scale->tmpline2;
|
|
taps = scale->taps_s16_4;
|
|
count = width * n_elems;
|
|
|
|
if (max_taps == 2) {
|
|
video_orc_resample_h_2tap_u16 (d, pixels, pixels + count, taps,
|
|
taps + count, count);
|
|
} else {
|
|
/* first pixels with first tap to t4 */
|
|
video_orc_resample_h_multaps_u16 (temp, pixels, taps, count);
|
|
/* add other pixels with other taps to t4 */
|
|
video_orc_resample_h_muladdtaps_u16 (temp, 0, pixels + count, count * 2,
|
|
taps + count, count * 2, count, max_taps - 1);
|
|
/* scale and write final result */
|
|
video_orc_resample_scaletaps_u16 (d, temp, count);
|
|
}
|
|
}
|
|
|
|
static void
|
|
video_scale_v_near_u8 (GstVideoScaler * scale,
|
|
gpointer srcs[], gpointer dest, guint dest_offset, guint width,
|
|
guint n_elems)
|
|
{
|
|
if (dest != srcs[0])
|
|
memcpy (dest, srcs[0], n_elems * width);
|
|
}
|
|
|
|
static void
|
|
video_scale_v_near_u16 (GstVideoScaler * scale,
|
|
gpointer srcs[], gpointer dest, guint dest_offset, guint width,
|
|
guint n_elems)
|
|
{
|
|
if (dest != srcs[0])
|
|
memcpy (dest, srcs[0], n_elems * 2 * width);
|
|
}
|
|
|
|
static void
|
|
video_scale_v_2tap_u8 (GstVideoScaler * scale,
|
|
gpointer srcs[], gpointer dest, guint dest_offset, guint width,
|
|
guint n_elems)
|
|
{
|
|
gint max_taps, src_inc;
|
|
guint8 *s1, *s2, *d;
|
|
gint16 p1;
|
|
|
|
if (scale->taps_s16 == NULL)
|
|
#ifdef LQ
|
|
make_s16_taps (scale, n_elems, SCALE_U8_LQ + 2);
|
|
#else
|
|
make_s16_taps (scale, n_elems, SCALE_U8);
|
|
#endif
|
|
|
|
max_taps = scale->resampler.max_taps;
|
|
|
|
if (scale->flags & GST_VIDEO_SCALER_FLAG_INTERLACED)
|
|
src_inc = 2;
|
|
else
|
|
src_inc = 1;
|
|
|
|
d = (guint8 *) dest;
|
|
s1 = (guint8 *) srcs[0 * src_inc];
|
|
s2 = (guint8 *) srcs[1 * src_inc];
|
|
p1 = scale->taps_s16[dest_offset * max_taps + 1];
|
|
|
|
#ifdef LQ
|
|
video_orc_resample_v_2tap_u8_lq (d, s1, s2, p1, width * n_elems);
|
|
#else
|
|
video_orc_resample_v_2tap_u8 (d, s1, s2, p1, width * n_elems);
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
video_scale_v_2tap_u16 (GstVideoScaler * scale,
|
|
gpointer srcs[], gpointer dest, guint dest_offset, guint width,
|
|
guint n_elems)
|
|
{
|
|
gint max_taps, src_inc;
|
|
guint16 *s1, *s2, *d;
|
|
gint16 p1;
|
|
|
|
if (scale->taps_s16 == NULL)
|
|
make_s16_taps (scale, n_elems, SCALE_U16);
|
|
|
|
max_taps = scale->resampler.max_taps;
|
|
|
|
if (scale->flags & GST_VIDEO_SCALER_FLAG_INTERLACED)
|
|
src_inc = 2;
|
|
else
|
|
src_inc = 1;
|
|
|
|
d = (guint16 *) dest;
|
|
s1 = (guint16 *) srcs[0 * src_inc];
|
|
s2 = (guint16 *) srcs[1 * src_inc];
|
|
p1 = scale->taps_s16[dest_offset * max_taps + 1];
|
|
|
|
video_orc_resample_v_2tap_u16 (d, s1, s2, p1, width * n_elems);
|
|
}
|
|
|
|
#if 0
|
|
static void
|
|
video_scale_h_4tap_8888 (GstVideoScaler * scale,
|
|
gpointer src, gpointer dest, guint dest_offset, guint width)
|
|
{
|
|
gint16 *taps;
|
|
gint i, max_taps, count;
|
|
guint8 *d;
|
|
guint32 *offset_n;
|
|
guint32 *pixels;
|
|
|
|
if (scale->taps_s16 == NULL)
|
|
make_s16_taps (scale, n_elems, S16_SCALE);
|
|
|
|
max_taps = scale->resampler.max_taps;
|
|
offset_n = scale->offset_n;
|
|
|
|
d = (guint8 *) dest + 4 * dest_offset;
|
|
|
|
/* prepare the arrays FIXME, we can add this into ORC */
|
|
count = width * max_taps;
|
|
pixels = (guint32 *) scale->tmpline1;
|
|
for (i = 0; i < count; i++)
|
|
pixels[i] = ((guint32 *) src)[offset_n[i]];
|
|
|
|
taps = scale->taps_s16_4;
|
|
count = width * 4;
|
|
|
|
video_orc_resample_h_4tap_8 (d, pixels, pixels + width, pixels + 2 * width,
|
|
pixels + 3 * width, taps, taps + count, taps + 2 * count,
|
|
taps + 3 * count, count);
|
|
}
|
|
#endif
|
|
|
|
static void
|
|
video_scale_v_4tap_u8 (GstVideoScaler * scale,
|
|
gpointer srcs[], gpointer dest, guint dest_offset, guint width,
|
|
guint n_elems)
|
|
{
|
|
gint max_taps;
|
|
guint8 *s1, *s2, *s3, *s4, *d;
|
|
gint p1, p2, p3, p4, src_inc;
|
|
gint16 *taps;
|
|
|
|
if (scale->taps_s16 == NULL)
|
|
#ifdef LQ
|
|
make_s16_taps (scale, n_elems, SCALE_U8_LQ);
|
|
#else
|
|
make_s16_taps (scale, n_elems, SCALE_U8);
|
|
#endif
|
|
|
|
max_taps = scale->resampler.max_taps;
|
|
taps = scale->taps_s16 + dest_offset * max_taps;
|
|
|
|
if (scale->flags & GST_VIDEO_SCALER_FLAG_INTERLACED)
|
|
src_inc = 2;
|
|
else
|
|
src_inc = 1;
|
|
|
|
d = (guint8 *) dest;
|
|
s1 = (guint8 *) srcs[0 * src_inc];
|
|
s2 = (guint8 *) srcs[1 * src_inc];
|
|
s3 = (guint8 *) srcs[2 * src_inc];
|
|
s4 = (guint8 *) srcs[3 * src_inc];
|
|
p1 = taps[0];
|
|
p2 = taps[1];
|
|
p3 = taps[2];
|
|
p4 = taps[3];
|
|
|
|
#ifdef LQ
|
|
video_orc_resample_v_4tap_u8_lq (d, s1, s2, s3, s4, p1, p2, p3, p4,
|
|
width * n_elems);
|
|
#else
|
|
video_orc_resample_v_4tap_u8 (d, s1, s2, s3, s4, p1, p2, p3, p4,
|
|
width * n_elems);
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
video_scale_v_ntap_u8 (GstVideoScaler * scale,
|
|
gpointer srcs[], gpointer dest, guint dest_offset, guint width,
|
|
guint n_elems)
|
|
{
|
|
gint16 *taps;
|
|
gint i, max_taps, count, src_inc;
|
|
gpointer d;
|
|
gint16 *temp;
|
|
|
|
if (scale->taps_s16 == NULL)
|
|
#ifdef LQ
|
|
make_s16_taps (scale, n_elems, SCALE_U8_LQ);
|
|
#else
|
|
make_s16_taps (scale, n_elems, SCALE_U8);
|
|
#endif
|
|
|
|
max_taps = scale->resampler.max_taps;
|
|
taps = scale->taps_s16 + (scale->resampler.phase[dest_offset] * max_taps);
|
|
|
|
d = (guint32 *) dest;
|
|
|
|
if (scale->flags & GST_VIDEO_SCALER_FLAG_INTERLACED)
|
|
src_inc = 2;
|
|
else
|
|
src_inc = 1;
|
|
|
|
temp = (gint16 *) scale->tmpline2;
|
|
count = width * n_elems;
|
|
|
|
#ifdef LQ
|
|
if (max_taps >= 4) {
|
|
video_orc_resample_v_multaps4_u8_lq (temp, srcs[0], srcs[1 * src_inc],
|
|
srcs[2 * src_inc], srcs[3 * src_inc], taps[0], taps[1], taps[2],
|
|
taps[3], count);
|
|
max_taps -= 4;
|
|
srcs += 4 * src_inc;
|
|
taps += 4;
|
|
} else {
|
|
gint first = (max_taps % 4);
|
|
|
|
video_orc_resample_v_multaps_u8_lq (temp, srcs[0], taps[0], count);
|
|
for (i = 1; i < first; i++) {
|
|
video_orc_resample_v_muladdtaps_u8_lq (temp, srcs[i * src_inc], taps[i],
|
|
count);
|
|
}
|
|
max_taps -= first;
|
|
srcs += first * src_inc;
|
|
taps += first;
|
|
}
|
|
while (max_taps > 4) {
|
|
if (max_taps >= 8) {
|
|
video_orc_resample_v_muladdtaps4_u8_lq (temp, srcs[0], srcs[1 * src_inc],
|
|
srcs[2 * src_inc], srcs[3 * src_inc], taps[0], taps[1], taps[2],
|
|
taps[3], count);
|
|
max_taps -= 4;
|
|
srcs += 4 * src_inc;
|
|
taps += 4;
|
|
} else {
|
|
for (i = 0; i < max_taps - 4; i++)
|
|
video_orc_resample_v_muladdtaps_u8_lq (temp, srcs[i * src_inc], taps[i],
|
|
count);
|
|
srcs += (max_taps - 4) * src_inc;
|
|
taps += (max_taps - 4);
|
|
max_taps = 4;
|
|
}
|
|
}
|
|
if (max_taps == 4) {
|
|
video_orc_resample_v_muladdscaletaps4_u8_lq (d, srcs[0], srcs[1 * src_inc],
|
|
srcs[2 * src_inc], srcs[3 * src_inc], temp, taps[0], taps[1], taps[2],
|
|
taps[3], count);
|
|
} else {
|
|
for (i = 0; i < max_taps; i++)
|
|
video_orc_resample_v_muladdtaps_u8_lq (temp, srcs[i * src_inc], taps[i],
|
|
count);
|
|
video_orc_resample_scaletaps_u8_lq (d, temp, count);
|
|
}
|
|
|
|
#else
|
|
video_orc_resample_v_multaps_u8 (temp, srcs[0], taps[0], count);
|
|
for (i = 1; i < max_taps; i++) {
|
|
video_orc_resample_v_muladdtaps_u8 (temp, srcs[i * src_inc], taps[i],
|
|
count);
|
|
}
|
|
video_orc_resample_scaletaps_u8 (d, temp, count);
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
video_scale_v_ntap_u16 (GstVideoScaler * scale,
|
|
gpointer srcs[], gpointer dest, guint dest_offset, guint width,
|
|
guint n_elems)
|
|
{
|
|
gint16 *taps;
|
|
gint i, max_taps, count, src_inc;
|
|
gpointer d;
|
|
gint32 *temp;
|
|
|
|
if (scale->taps_s16 == NULL)
|
|
make_s16_taps (scale, n_elems, SCALE_U16);
|
|
|
|
max_taps = scale->resampler.max_taps;
|
|
taps = scale->taps_s16 + (scale->resampler.phase[dest_offset] * max_taps);
|
|
|
|
d = (guint16 *) dest;
|
|
|
|
if (scale->flags & GST_VIDEO_SCALER_FLAG_INTERLACED)
|
|
src_inc = 2;
|
|
else
|
|
src_inc = 1;
|
|
|
|
temp = (gint32 *) scale->tmpline2;
|
|
count = width * n_elems;
|
|
|
|
video_orc_resample_v_multaps_u16 (temp, srcs[0], taps[0], count);
|
|
for (i = 1; i < max_taps; i++) {
|
|
video_orc_resample_v_muladdtaps_u16 (temp, srcs[i * src_inc], taps[i],
|
|
count);
|
|
}
|
|
video_orc_resample_scaletaps_u16 (d, temp, count);
|
|
}
|
|
|
|
static gint
|
|
get_y_offset (GstVideoFormat format)
|
|
{
|
|
switch (format) {
|
|
case GST_VIDEO_FORMAT_YUY2:
|
|
case GST_VIDEO_FORMAT_YVYU:
|
|
return 0;
|
|
default:
|
|
case GST_VIDEO_FORMAT_UYVY:
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_video_scaler_combine_packed_YUV: (skip)
|
|
* @y_scale: a scaler for the Y component
|
|
* @uv_scale: a scaler for the U and V components
|
|
* @in_format: the input video format
|
|
* @out_format: the output video format
|
|
*
|
|
* Combine a scaler for Y and UV into one scaler for the packed @format.
|
|
*
|
|
* Returns: a new horizontal videoscaler for @format.
|
|
*
|
|
* Since: 1.6
|
|
*/
|
|
GstVideoScaler *
|
|
gst_video_scaler_combine_packed_YUV (GstVideoScaler * y_scale,
|
|
GstVideoScaler * uv_scale, GstVideoFormat in_format,
|
|
GstVideoFormat out_format)
|
|
{
|
|
GstVideoScaler *scale;
|
|
GstVideoResampler *resampler;
|
|
guint i, out_size, max_taps, n_phases;
|
|
gdouble *taps;
|
|
guint32 *offset, *phase;
|
|
|
|
g_return_val_if_fail (y_scale != NULL, NULL);
|
|
g_return_val_if_fail (uv_scale != NULL, NULL);
|
|
g_return_val_if_fail (uv_scale->resampler.max_taps ==
|
|
y_scale->resampler.max_taps, NULL);
|
|
|
|
scale = g_slice_new0 (GstVideoScaler);
|
|
|
|
scale->method = y_scale->method;
|
|
scale->flags = y_scale->flags;
|
|
scale->merged = TRUE;
|
|
|
|
resampler = &scale->resampler;
|
|
|
|
out_size = GST_ROUND_UP_4 (y_scale->resampler.out_size * 2);
|
|
max_taps = y_scale->resampler.max_taps;
|
|
n_phases = out_size;
|
|
offset = g_malloc (sizeof (guint32) * out_size);
|
|
phase = g_malloc (sizeof (guint32) * n_phases);
|
|
taps = g_malloc (sizeof (gdouble) * max_taps * n_phases);
|
|
|
|
resampler->in_size = y_scale->resampler.in_size * 2;
|
|
resampler->out_size = out_size;
|
|
resampler->max_taps = max_taps;
|
|
resampler->n_phases = n_phases;
|
|
resampler->offset = offset;
|
|
resampler->phase = phase;
|
|
resampler->n_taps = g_malloc (sizeof (guint32) * out_size);
|
|
resampler->taps = taps;
|
|
|
|
scale->in_y_offset = get_y_offset (in_format);
|
|
scale->out_y_offset = get_y_offset (out_format);
|
|
scale->inc = y_scale->inc;
|
|
|
|
for (i = 0; i < out_size; i++) {
|
|
gint ic;
|
|
|
|
if ((i & 1) == scale->out_y_offset) {
|
|
ic = MIN (i / 2, y_scale->resampler.out_size - 1);
|
|
offset[i] = y_scale->resampler.offset[ic] * 2 + scale->in_y_offset;
|
|
memcpy (taps + i * max_taps, y_scale->resampler.taps +
|
|
y_scale->resampler.phase[ic] * max_taps, max_taps * sizeof (gdouble));
|
|
} else {
|
|
ic = MIN (i / 4, uv_scale->resampler.out_size - 1);
|
|
offset[i] = uv_scale->resampler.offset[ic] * 4 + (i & 3);
|
|
memcpy (taps + i * max_taps, uv_scale->resampler.taps +
|
|
uv_scale->resampler.phase[ic] * max_taps,
|
|
max_taps * sizeof (gdouble));
|
|
}
|
|
phase[i] = i;
|
|
}
|
|
|
|
scaler_dump (scale);
|
|
|
|
return scale;
|
|
}
|
|
|
|
static gboolean
|
|
get_functions (GstVideoScaler * hscale, GstVideoScaler * vscale,
|
|
GstVideoFormat format,
|
|
GstVideoScalerHFunc * hfunc, GstVideoScalerVFunc * vfunc,
|
|
gint * n_elems, guint * width, gint * bits)
|
|
{
|
|
gboolean mono = FALSE;
|
|
|
|
switch (format) {
|
|
case GST_VIDEO_FORMAT_GRAY8:
|
|
*bits = 8;
|
|
*n_elems = 1;
|
|
mono = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_YUY2:
|
|
case GST_VIDEO_FORMAT_YVYU:
|
|
case GST_VIDEO_FORMAT_UYVY:
|
|
*bits = 8;
|
|
*n_elems = 1;
|
|
*width = GST_ROUND_UP_4 (*width * 2);
|
|
break;
|
|
case GST_VIDEO_FORMAT_RGB:
|
|
case GST_VIDEO_FORMAT_BGR:
|
|
case GST_VIDEO_FORMAT_v308:
|
|
case GST_VIDEO_FORMAT_IYU2:
|
|
*bits = 8;
|
|
*n_elems = 3;
|
|
break;
|
|
case GST_VIDEO_FORMAT_AYUV:
|
|
case GST_VIDEO_FORMAT_RGBx:
|
|
case GST_VIDEO_FORMAT_BGRx:
|
|
case GST_VIDEO_FORMAT_xRGB:
|
|
case GST_VIDEO_FORMAT_xBGR:
|
|
case GST_VIDEO_FORMAT_RGBA:
|
|
case GST_VIDEO_FORMAT_BGRA:
|
|
case GST_VIDEO_FORMAT_ARGB:
|
|
case GST_VIDEO_FORMAT_ABGR:
|
|
*bits = 8;
|
|
*n_elems = 4;
|
|
break;
|
|
case GST_VIDEO_FORMAT_ARGB64:
|
|
case GST_VIDEO_FORMAT_AYUV64:
|
|
*bits = 16;
|
|
*n_elems = 4;
|
|
break;
|
|
case GST_VIDEO_FORMAT_GRAY16_LE:
|
|
case GST_VIDEO_FORMAT_GRAY16_BE:
|
|
*bits = 16;
|
|
*n_elems = 1;
|
|
mono = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_NV12:
|
|
case GST_VIDEO_FORMAT_NV16:
|
|
case GST_VIDEO_FORMAT_NV21:
|
|
case GST_VIDEO_FORMAT_NV24:
|
|
case GST_VIDEO_FORMAT_NV61:
|
|
*bits = 8;
|
|
*n_elems = 2;
|
|
break;
|
|
default:
|
|
return FALSE;
|
|
}
|
|
if (*bits == 8) {
|
|
switch (hscale ? hscale->resampler.max_taps : 0) {
|
|
case 0:
|
|
break;
|
|
case 1:
|
|
if (*n_elems == 1)
|
|
*hfunc = video_scale_h_near_u8;
|
|
else if (*n_elems == 2)
|
|
*hfunc = video_scale_h_near_u16;
|
|
else if (*n_elems == 3)
|
|
*hfunc = video_scale_h_near_3u8;
|
|
else if (*n_elems == 4)
|
|
*hfunc = video_scale_h_near_u32;
|
|
break;
|
|
case 2:
|
|
if (*n_elems == 1 && mono)
|
|
*hfunc = video_scale_h_2tap_1u8;
|
|
else if (*n_elems == 4)
|
|
*hfunc = video_scale_h_2tap_4u8;
|
|
else
|
|
*hfunc = video_scale_h_ntap_u8;
|
|
break;
|
|
default:
|
|
*hfunc = video_scale_h_ntap_u8;
|
|
break;
|
|
}
|
|
switch (vscale ? vscale->resampler.max_taps : 0) {
|
|
case 0:
|
|
break;
|
|
case 1:
|
|
*vfunc = video_scale_v_near_u8;
|
|
break;
|
|
case 2:
|
|
*vfunc = video_scale_v_2tap_u8;
|
|
break;
|
|
case 4:
|
|
*vfunc = video_scale_v_4tap_u8;
|
|
break;
|
|
default:
|
|
*vfunc = video_scale_v_ntap_u8;
|
|
break;
|
|
}
|
|
} else if (*bits == 16) {
|
|
switch (hscale ? hscale->resampler.max_taps : 0) {
|
|
case 0:
|
|
break;
|
|
case 1:
|
|
if (*n_elems == 1)
|
|
*hfunc = video_scale_h_near_u16;
|
|
else
|
|
*hfunc = video_scale_h_near_u64;
|
|
break;
|
|
default:
|
|
*hfunc = video_scale_h_ntap_u16;
|
|
break;
|
|
}
|
|
switch (vscale ? vscale->resampler.max_taps : 0) {
|
|
case 0:
|
|
break;
|
|
case 1:
|
|
*vfunc = video_scale_v_near_u16;
|
|
break;
|
|
case 2:
|
|
*vfunc = video_scale_v_2tap_u16;
|
|
break;
|
|
default:
|
|
*vfunc = video_scale_v_ntap_u16;
|
|
break;
|
|
}
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* gst_video_scaler_horizontal:
|
|
* @scale: a #GstVideoScaler
|
|
* @format: a #GstVideoFormat for @src and @dest
|
|
* @src: source pixels
|
|
* @dest: destination pixels
|
|
* @dest_offset: the horizontal destination offset
|
|
* @width: the number of pixels to scale
|
|
*
|
|
* Horizontally scale the pixels in @src to @dest, starting from @dest_offset
|
|
* for @width samples.
|
|
*/
|
|
void
|
|
gst_video_scaler_horizontal (GstVideoScaler * scale, GstVideoFormat format,
|
|
gpointer src, gpointer dest, guint dest_offset, guint width)
|
|
{
|
|
gint n_elems, bits;
|
|
GstVideoScalerHFunc func = NULL;
|
|
|
|
g_return_if_fail (scale != NULL);
|
|
g_return_if_fail (src != NULL);
|
|
g_return_if_fail (dest != NULL);
|
|
g_return_if_fail (dest_offset + width <= scale->resampler.out_size);
|
|
|
|
if (!get_functions (scale, NULL, format, &func, NULL, &n_elems, &width, &bits)
|
|
|| func == NULL)
|
|
goto no_func;
|
|
|
|
if (scale->tmpwidth < width)
|
|
realloc_tmplines (scale, n_elems, width);
|
|
|
|
func (scale, src, dest, dest_offset, width, n_elems);
|
|
return;
|
|
|
|
no_func:
|
|
{
|
|
GST_WARNING ("no scaler function for format");
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_video_scaler_vertical:
|
|
* @scale: a #GstVideoScaler
|
|
* @format: a #GstVideoFormat for @srcs and @dest
|
|
* @src_lines: source pixels lines
|
|
* @dest: destination pixels
|
|
* @dest_offset: the vertical destination offset
|
|
* @width: the number of pixels to scale
|
|
*
|
|
* Vertically combine @width pixels in the lines in @src_lines to @dest.
|
|
* @dest is the location of the target line at @dest_offset and
|
|
* @srcs are the input lines for @dest_offset.
|
|
*/
|
|
void
|
|
gst_video_scaler_vertical (GstVideoScaler * scale, GstVideoFormat format,
|
|
gpointer src_lines[], gpointer dest, guint dest_offset, guint width)
|
|
{
|
|
gint n_elems, bits;
|
|
GstVideoScalerVFunc func = NULL;
|
|
|
|
g_return_if_fail (scale != NULL);
|
|
g_return_if_fail (src_lines != NULL);
|
|
g_return_if_fail (dest != NULL);
|
|
g_return_if_fail (dest_offset < scale->resampler.out_size);
|
|
|
|
if (!get_functions (NULL, scale, format, NULL, &func, &n_elems, &width, &bits)
|
|
|| func == NULL)
|
|
goto no_func;
|
|
|
|
if (scale->tmpwidth < width)
|
|
realloc_tmplines (scale, n_elems, width);
|
|
|
|
func (scale, src_lines, dest, dest_offset, width, n_elems);
|
|
|
|
return;
|
|
|
|
no_func:
|
|
{
|
|
GST_WARNING ("no scaler function for format");
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* gst_video_scaler_2d:
|
|
* @hscale: a horzontal #GstVideoScaler
|
|
* @vscale: a vertical #GstVideoScaler
|
|
* @format: a #GstVideoFormat for @srcs and @dest
|
|
* @src: source pixels
|
|
* @src_stride: source pixels stride
|
|
* @dest: destination pixels
|
|
* @dest_stride: destination pixels stride
|
|
* @x: the horizontal destination offset
|
|
* @y: the vertical destination offset
|
|
* @width: the number of output pixels to scale
|
|
* @height: the number of output lines to scale
|
|
*
|
|
* Scale a rectangle of pixels in @src with @src_stride to @dest with
|
|
* @dest_stride using the horizontal scaler @hscaler and the vertical
|
|
* scaler @vscale.
|
|
*
|
|
* One or both of @hscale and @vscale can be NULL to only perform scaling in
|
|
* one dimension or do a copy without scaling.
|
|
*
|
|
* @x and @y are the coordinates in the destination image to process.
|
|
*/
|
|
void
|
|
gst_video_scaler_2d (GstVideoScaler * hscale, GstVideoScaler * vscale,
|
|
GstVideoFormat format, gpointer src, gint src_stride,
|
|
gpointer dest, gint dest_stride, guint x, guint y,
|
|
guint width, guint height)
|
|
{
|
|
gint n_elems, bits;
|
|
GstVideoScalerHFunc hfunc = NULL;
|
|
GstVideoScalerVFunc vfunc = NULL;
|
|
gint i;
|
|
|
|
g_return_if_fail (src != NULL);
|
|
g_return_if_fail (dest != NULL);
|
|
|
|
if (!get_functions (hscale, vscale, format, &hfunc, &vfunc, &n_elems, &width,
|
|
&bits))
|
|
goto no_func;
|
|
|
|
#define LINE(s,ss,i) ((guint8 *)(s) + ((i) * (ss)))
|
|
#define TMP_LINE(s,i,v) ((guint8 *)(s->tmpline1) + (((i) % (v)) * (sizeof (gint32) * width * n_elems)))
|
|
|
|
if (vscale == NULL) {
|
|
if (hscale == NULL) {
|
|
guint xo, xw;
|
|
guint8 *s, *d;
|
|
|
|
xo = x * n_elems;
|
|
xw = width * n_elems * (bits / 8);
|
|
|
|
s = LINE (src, src_stride, y) + xo;
|
|
d = LINE (dest, dest_stride, y) + xo;
|
|
|
|
/* no scaling, do memcpy */
|
|
for (i = y; i < height; i++) {
|
|
memcpy (d, s, xw);
|
|
d += dest_stride;
|
|
s += src_stride;
|
|
}
|
|
} else {
|
|
if (hscale->tmpwidth < width)
|
|
realloc_tmplines (hscale, n_elems, width);
|
|
|
|
/* only horizontal scaling */
|
|
for (i = y; i < height; i++) {
|
|
hfunc (hscale, LINE (src, src_stride, i), LINE (dest, dest_stride, i),
|
|
x, width, n_elems);
|
|
}
|
|
}
|
|
} else {
|
|
guint v_taps;
|
|
gpointer *lines;
|
|
|
|
if (vscale->tmpwidth < width)
|
|
realloc_tmplines (vscale, n_elems, width);
|
|
|
|
v_taps = vscale->resampler.max_taps;
|
|
lines = g_alloca (v_taps * sizeof (gpointer));
|
|
|
|
if (hscale == NULL) {
|
|
/* only vertical scaling */
|
|
for (i = y; i < height; i++) {
|
|
guint in, j;
|
|
|
|
in = vscale->resampler.offset[i];
|
|
for (j = 0; j < v_taps; j++)
|
|
lines[j] = LINE (src, src_stride, in + j);
|
|
|
|
vfunc (vscale, lines, LINE (dest, dest_stride, i), i, width, n_elems);
|
|
}
|
|
} else {
|
|
gint s1, s2;
|
|
|
|
if (hscale->tmpwidth < width)
|
|
realloc_tmplines (hscale, n_elems, width);
|
|
|
|
s1 = width * vscale->resampler.offset[height - 1];
|
|
s2 = width * height;
|
|
|
|
if (s1 <= s2) {
|
|
gint tmp_in = vscale->resampler.offset[y];
|
|
|
|
for (i = y; i < height; i++) {
|
|
guint in, j;
|
|
|
|
in = vscale->resampler.offset[i];
|
|
while (tmp_in < in)
|
|
tmp_in++;
|
|
while (tmp_in < in + v_taps) {
|
|
hfunc (hscale, LINE (src, src_stride, tmp_in), TMP_LINE (vscale,
|
|
tmp_in, v_taps), x, width, n_elems);
|
|
tmp_in++;
|
|
}
|
|
for (j = 0; j < v_taps; j++)
|
|
lines[j] = TMP_LINE (vscale, in + j, v_taps);
|
|
|
|
vfunc (vscale, lines, LINE (dest, dest_stride, i), i, width, n_elems);
|
|
}
|
|
} else {
|
|
guint vx, vw, w1, ws;
|
|
guint h_taps;
|
|
|
|
h_taps = hscale->resampler.max_taps;
|
|
w1 = x + width - 1;
|
|
ws = hscale->resampler.offset[w1];
|
|
|
|
/* we need to estimate the area that we first need to scale in the
|
|
* vertical direction. Scale x and width to find the lower bound and
|
|
* overshoot the width to find the upper bound */
|
|
vx = (hscale->inc * x) >> 16;
|
|
vx = MIN (vx, hscale->resampler.offset[x]);
|
|
vw = (hscale->inc * (x + width)) >> 16;
|
|
if (hscale->merged) {
|
|
if ((w1 & 1) == hscale->out_y_offset)
|
|
vw = MAX (vw, ws + (2 * h_taps));
|
|
else
|
|
vw = MAX (vw, ws + (4 * h_taps));
|
|
} else {
|
|
vw = MAX (vw, ws + h_taps);
|
|
}
|
|
vw += 1;
|
|
/* but clamp to max size */
|
|
vw = MIN (vw, hscale->resampler.in_size);
|
|
|
|
if (vscale->tmpwidth < vw)
|
|
realloc_tmplines (vscale, n_elems, vw);
|
|
|
|
for (i = y; i < height; i++) {
|
|
guint in, j;
|
|
|
|
in = vscale->resampler.offset[i];
|
|
for (j = 0; j < v_taps; j++)
|
|
lines[j] = LINE (src, src_stride, in + j) + vx * n_elems;
|
|
|
|
vfunc (vscale, lines, TMP_LINE (vscale, 0, v_taps) + vx * n_elems, i,
|
|
vw - vx, n_elems);
|
|
|
|
hfunc (hscale, TMP_LINE (vscale, 0, v_taps), LINE (dest, dest_stride,
|
|
i), x, width, n_elems);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return;
|
|
|
|
no_func:
|
|
{
|
|
GST_WARNING ("no scaler function for format");
|
|
}
|
|
}
|