1 /* GStreamer
2 *
3 * Copyright (C) 2016 Igalia
4 *
5 * Authors:
6 * Víctor Manuel Jáquez Leal <vjaquez@igalia.com>
7 * Javier Martin <javiermartin@by.com.es>
8 *
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Library General Public
11 * License as published by the Free Software Foundation; either
12 * version 2 of the License, or (at your option) any later version.
13 *
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Library General Public License for more details.
18 *
19 * You should have received a copy of the GNU Library General Public
20 * License along with this library; if not, write to the
21 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
22 * Boston, MA 02110-1301, USA.
23 *
24 */
25
26 #ifdef HAVE_CONFIG_H
27 #include "config.h"
28 #endif
29
30 #include <drm_fourcc.h>
31
32 #include "gstkmsutils.h"
33
34 /* *INDENT-OFF* */
35 static const struct
36 {
37 guint32 fourcc;
38 GstVideoFormat format;
39 } format_map[] = {
40 #define DEF_FMT(fourcc, fmt) \
41 { DRM_FORMAT_##fourcc,GST_VIDEO_FORMAT_##fmt }
42
43 /* Keep sorted by decreasing quality, refer to GST_VIDEO_FORMATS_ALL order
44 * if unsure */
45
46 /* 32bits/p RGB with Alpha */
47 DEF_FMT (ARGB8888, BGRA),
48 DEF_FMT (ABGR8888, RGBA),
49
50 /* 16bits/c YUV 4:2:0 */
51 DEF_FMT (P016, P016_LE),
52
53 /* 16bits/c YUV 4:2:0 */
54 DEF_FMT (P010, P010_10LE),
55
56 /* YUV 4:4:4 */
57 DEF_FMT (NV24, NV24),
58
59 /* 32bits/p RGB opaque */
60 DEF_FMT (XRGB8888, BGRx),
61 DEF_FMT (XBGR8888, RGBx),
62
63 /* 24bits RGB opaque */
64 DEF_FMT (BGR888, RGB),
65 DEF_FMT (RGB888, BGR),
66
67 /* 8bits/c YUV 4:2:2 */
68 DEF_FMT (YUV422, Y42B),
69 DEF_FMT (NV61, NV61),
70 DEF_FMT (NV16, NV16),
71 DEF_FMT (UYVY, UYVY),
72 DEF_FMT (YVYU, YVYU),
73 DEF_FMT (YUYV, YUY2),
74
75 /* 8bits/c YUV 4:2:0 */
76 DEF_FMT (YUV420, I420),
77 DEF_FMT (YVU420, YV12),
78 DEF_FMT (NV21, NV21),
79 DEF_FMT (NV12, NV12),
80
81 /* 16bits/p RGB */
82 DEF_FMT (RGB565, RGB16),
83 DEF_FMT (BGR565, BGR16),
84
85 #undef DEF_FMT
86 };
87 /* *INDENT-ON* */
88
89 GstVideoFormat
gst_video_format_from_drm(guint32 drmfmt)90 gst_video_format_from_drm (guint32 drmfmt)
91 {
92 gint i;
93
94 for (i = 0; i < G_N_ELEMENTS (format_map); i++) {
95 if (format_map[i].fourcc == drmfmt)
96 return format_map[i].format;
97 }
98
99 return GST_VIDEO_FORMAT_UNKNOWN;
100 }
101
102 guint32
gst_drm_format_from_video(GstVideoFormat fmt)103 gst_drm_format_from_video (GstVideoFormat fmt)
104 {
105 gint i;
106
107 for (i = 0; i < G_N_ELEMENTS (format_map); i++) {
108 if (format_map[i].format == fmt)
109 return format_map[i].fourcc;
110 }
111
112 return 0;
113 }
114
115 guint32
gst_drm_bpp_from_drm(guint32 drmfmt)116 gst_drm_bpp_from_drm (guint32 drmfmt)
117 {
118 guint32 bpp;
119
120 switch (drmfmt) {
121 case DRM_FORMAT_YUV420:
122 case DRM_FORMAT_YVU420:
123 case DRM_FORMAT_YUV422:
124 case DRM_FORMAT_NV12:
125 case DRM_FORMAT_NV21:
126 case DRM_FORMAT_NV16:
127 case DRM_FORMAT_NV61:
128 case DRM_FORMAT_NV24:
129 bpp = 8;
130 break;
131 case DRM_FORMAT_P010:
132 bpp = 10;
133 break;
134 case DRM_FORMAT_UYVY:
135 case DRM_FORMAT_YUYV:
136 case DRM_FORMAT_YVYU:
137 case DRM_FORMAT_P016:
138 case DRM_FORMAT_RGB565:
139 case DRM_FORMAT_BGR565:
140 bpp = 16;
141 break;
142 case DRM_FORMAT_BGR888:
143 case DRM_FORMAT_RGB888:
144 bpp = 24;
145 break;
146 default:
147 bpp = 32;
148 break;
149 }
150
151 return bpp;
152 }
153
154 guint32
gst_drm_height_from_drm(guint32 drmfmt,guint32 height)155 gst_drm_height_from_drm (guint32 drmfmt, guint32 height)
156 {
157 guint32 ret;
158
159 switch (drmfmt) {
160 case DRM_FORMAT_YUV420:
161 case DRM_FORMAT_YVU420:
162 case DRM_FORMAT_YUV422:
163 case DRM_FORMAT_NV12:
164 case DRM_FORMAT_NV21:
165 case DRM_FORMAT_P010:
166 case DRM_FORMAT_P016:
167 ret = height * 3 / 2;
168 break;
169 case DRM_FORMAT_NV16:
170 case DRM_FORMAT_NV61:
171 ret = height * 2;
172 break;
173 case DRM_FORMAT_NV24:
174 ret = height * 3;
175 break;
176 default:
177 ret = height;
178 break;
179 }
180
181 return ret;
182 }
183
184 static GstStructure *
gst_video_format_to_structure(GstVideoFormat format)185 gst_video_format_to_structure (GstVideoFormat format)
186 {
187 GstStructure *structure;
188
189 structure = NULL;
190 if (format != GST_VIDEO_FORMAT_UNKNOWN)
191 structure = gst_structure_new ("video/x-raw", "format", G_TYPE_STRING,
192 gst_video_format_to_string (format), NULL);
193
194 return structure;
195 }
196
197 GstCaps *
gst_kms_sink_caps_template_fill(void)198 gst_kms_sink_caps_template_fill (void)
199 {
200 gint i;
201 GstCaps *caps;
202 GstStructure *template;
203
204 caps = gst_caps_new_empty ();
205 for (i = 0; i < G_N_ELEMENTS (format_map); i++) {
206 template = gst_video_format_to_structure (format_map[i].format);
207 gst_structure_set (template,
208 "width", GST_TYPE_INT_RANGE, 1, G_MAXINT,
209 "height", GST_TYPE_INT_RANGE, 1, G_MAXINT,
210 "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL);
211 gst_caps_append_structure (caps, template);
212 }
213 return gst_caps_simplify (caps);
214 }
215
216 static const gint device_par_map[][2] = {
217 {1, 1}, /* regular screen */
218 {16, 15}, /* PAL TV */
219 {11, 10}, /* 525 line Rec.601 video */
220 {54, 59}, /* 625 line Rec.601 video */
221 {64, 45}, /* 1280x1024 on 16:9 display */
222 {5, 3}, /* 1280x1024 on 4:3 display */
223 {4, 3} /* 800x600 on 16:9 display */
224 };
225
226 #define DELTA(ratio, idx, w) \
227 (ABS(ratio - ((gdouble)device_par_map[idx][w] / device_par_map[idx][!(w)])))
228
229 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)230 gst_video_calculate_device_ratio (guint dev_width, guint dev_height,
231 guint dev_width_mm, guint dev_height_mm,
232 guint * dpy_par_n, guint * dpy_par_d)
233 {
234 gdouble ratio, delta, cur_delta;
235 gint i, j, index, windex;
236
237 /* First, calculate the "real" ratio based on the X values; which is
238 * the "physical" w/h divided by the w/h in pixels of the display */
239 if (dev_width == 0 || dev_height == 0
240 || dev_width_mm == 0 || dev_height_mm == 0)
241 ratio = 1.0;
242 else
243 ratio = (gdouble) (dev_width_mm * dev_height) / (dev_height_mm * dev_width);
244
245 /* Now, find the one from device_par_map[][2] with the lowest delta
246 * to the real one */
247 delta = DELTA (ratio, 0, 0);
248 index = 0;
249 windex = 0;
250
251 for (i = 1; i < G_N_ELEMENTS (device_par_map); i++) {
252 for (j = 0; j < 2; j++) {
253 cur_delta = DELTA (ratio, i, j);
254 if (cur_delta < delta) {
255 index = i;
256 windex = j;
257 delta = cur_delta;
258 }
259 }
260 }
261
262 if (dpy_par_n)
263 *dpy_par_n = device_par_map[index][windex];
264
265 if (dpy_par_d)
266 *dpy_par_d = device_par_map[index][windex ^ 1];
267 }
268