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/* GStreamer
*
* Copyright (C) 2016 Igalia
*
* Authors:
* Víctor Manuel Jáquez Leal <vjaquez@igalia.com>
* Javier Martin <javiermartin@by.com.es>
*
* 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.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <drm_fourcc.h>
#include "gstkmsutils.h"
/* *INDENT-OFF* */
static const struct
{
guint32 fourcc;
GstVideoFormat format;
} format_map[] = {
#define DEF_FMT(fourcc, fmt) \
{ DRM_FORMAT_##fourcc,GST_VIDEO_FORMAT_##fmt }
/* DEF_FMT (XRGB1555, ???), */
/* DEF_FMT (XBGR1555, ???), */
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
DEF_FMT (ARGB8888, BGRA),
DEF_FMT (XRGB8888, BGRx),
DEF_FMT (ABGR8888, RGBA),
DEF_FMT (XBGR8888, RGBx),
#else
DEF_FMT (ARGB8888, ARGB),
DEF_FMT (XRGB8888, xRGB),
DEF_FMT (ABGR8888, ABGR),
DEF_FMT (XBGR8888, xBGR),
#endif
/* DEF_FMT (YUYV, ???), */
/* DEF_FMT (YVYU, ???), */
DEF_FMT (YUV420, I420),
DEF_FMT (YVU420, YV12),
DEF_FMT (YUV422, Y42B),
DEF_FMT (NV12, NV12),
DEF_FMT (NV21, NV21),
#undef DEF_FMT
};
/* *INDENT-ON* */
GstVideoFormat
gst_video_format_from_drm (guint32 drmfmt)
{
gint i;
for (i = 0; i < G_N_ELEMENTS (format_map); i++) {
if (format_map[i].fourcc == drmfmt)
return format_map[i].format;
}
return GST_VIDEO_FORMAT_UNKNOWN;
}
guint32
gst_drm_format_from_video (GstVideoFormat fmt)
{
gint i;
for (i = 0; i < G_N_ELEMENTS (format_map); i++) {
if (format_map[i].format == fmt)
return format_map[i].fourcc;
}
return 0;
}
static GstStructure *
gst_video_format_to_structure (GstVideoFormat format)
{
GstStructure *structure;
structure = NULL;
if (format != GST_VIDEO_FORMAT_UNKNOWN)
structure = gst_structure_new ("video/x-raw", "format", G_TYPE_STRING,
gst_video_format_to_string (format), NULL);
return structure;
}
GstCaps *
gst_kms_sink_caps_template_fill (void)
{
gint i;
GstCaps *caps;
GstStructure *template;
caps = gst_caps_new_empty ();
for (i = 0; i < G_N_ELEMENTS (format_map); i++) {
template = gst_video_format_to_structure (format_map[i].format);
gst_structure_set (template,
"width", GST_TYPE_INT_RANGE, 1, G_MAXINT,
"height", GST_TYPE_INT_RANGE, 1, G_MAXINT,
"framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL);
gst_caps_append_structure (caps, template);
}
return gst_caps_simplify (caps);
}
static const gint device_par_map[][2] = {
{1, 1}, /* regular screen */
{16, 15}, /* PAL TV */
{11, 10}, /* 525 line Rec.601 video */
{54, 59}, /* 625 line Rec.601 video */
{64, 45}, /* 1280x1024 on 16:9 display */
{5, 3}, /* 1280x1024 on 4:3 display */
{4, 3} /* 800x600 on 16:9 display */
};
#define DELTA(ratio, idx, w) \
(ABS(ratio - ((gdouble)device_par_map[idx][w] / device_par_map[idx][!(w)])))
void
gst_video_calculate_device_ratio (guint dev_width, guint dev_height,
guint dev_width_mm, guint dev_height_mm,
guint * dpy_par_n, guint * dpy_par_d)
{
gdouble ratio, delta, cur_delta;
gint i, j, index, windex;
/* First, calculate the "real" ratio based on the X values; which is
* the "physical" w/h divided by the w/h in pixels of the display */
if (dev_width == 0 || dev_height == 0
|| dev_width_mm == 0 || dev_height_mm == 0)
ratio = 1.0;
else
ratio = (gdouble) (dev_width_mm * dev_height) / (dev_height_mm * dev_width);
/* Now, find the one from device_par_map[][2] with the lowest delta
* to the real one */
delta = DELTA (ratio, 0, 0);
index = 0;
windex = 0;
for (i = 1; i < G_N_ELEMENTS (device_par_map); i++) {
for (j = 0; j < 2; j++) {
cur_delta = DELTA (ratio, i, j);
if (cur_delta < delta) {
index = i;
windex = j;
delta = cur_delta;
}
}
}
if (dpy_par_n)
*dpy_par_n = device_par_map[index][windex];
if (dpy_par_d)
*dpy_par_d = device_par_map[index][windex ^ 1];
}
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