Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2014 Collabora Ltd. |
| 3 | * Author: Nicolas Dufresne <nicolas.dufresne@collabora.co.uk> |
| 4 | * |
| 5 | * This library is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU Library General Public |
| 7 | * License as published by the Free Software Foundation; either |
| 8 | * version 2 of the License, or (at your option) any later version. |
| 9 | * |
| 10 | * This library is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | * Library General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU Library General Public |
| 16 | * License along with this library; if not, write to the |
| 17 | * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, |
| 18 | * Boston, MA 02110-1301, USA. |
| 19 | * |
| 20 | */ |
| 21 | |
| 22 | #ifdef HAVE_CONFIG_H |
| 23 | #include "config.h" |
| 24 | #endif |
| 25 | |
| 26 | #include <sys/stat.h> |
| 27 | #include <fcntl.h> |
| 28 | #include <errno.h> |
| 29 | #include <unistd.h> |
| 30 | #include <string.h> |
| 31 | |
Nicolas Dufresne | bec0385 | 2017-07-12 20:49:47 -0400 | [diff] [blame] | 32 | #include "gstv4l2object.h" |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 33 | #include "gstv4l2transform.h" |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 34 | |
| 35 | #include <string.h> |
| 36 | #include <gst/gst-i18n-plugin.h> |
| 37 | |
| 38 | #define DEFAULT_PROP_DEVICE "/dev/video10" |
| 39 | |
| 40 | #define V4L2_TRANSFORM_QUARK \ |
| 41 | g_quark_from_static_string("gst-v4l2-transform-info") |
| 42 | |
| 43 | GST_DEBUG_CATEGORY_STATIC (gst_v4l2_transform_debug); |
| 44 | #define GST_CAT_DEFAULT gst_v4l2_transform_debug |
| 45 | |
| 46 | |
| 47 | enum |
| 48 | { |
| 49 | PROP_0, |
Nicolas Dufresne | 077fcbc | 2014-05-15 18:08:53 -0400 | [diff] [blame] | 50 | V4L2_STD_OBJECT_PROPS |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 51 | }; |
| 52 | |
| 53 | typedef struct |
| 54 | { |
| 55 | gchar *device; |
| 56 | GstCaps *sink_caps; |
| 57 | GstCaps *src_caps; |
| 58 | } GstV4l2TransformCData; |
| 59 | |
| 60 | #define gst_v4l2_transform_parent_class parent_class |
| 61 | G_DEFINE_ABSTRACT_TYPE (GstV4l2Transform, gst_v4l2_transform, |
| 62 | GST_TYPE_BASE_TRANSFORM); |
| 63 | |
| 64 | static void |
| 65 | gst_v4l2_transform_set_property (GObject * object, |
| 66 | guint prop_id, const GValue * value, GParamSpec * pspec) |
| 67 | { |
| 68 | GstV4l2Transform *self = GST_V4L2_TRANSFORM (object); |
| 69 | |
| 70 | switch (prop_id) { |
Nicolas Dufresne | 077fcbc | 2014-05-15 18:08:53 -0400 | [diff] [blame] | 71 | case PROP_OUTPUT_IO_MODE: |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 72 | gst_v4l2_object_set_property_helper (self->v4l2output, prop_id, value, |
| 73 | pspec); |
| 74 | break; |
| 75 | case PROP_CAPTURE_IO_MODE: |
Nicolas Dufresne | 4ecd25d | 2015-11-19 15:33:45 -0500 | [diff] [blame] | 76 | gst_v4l2_object_set_property_helper (self->v4l2capture, prop_id, value, |
| 77 | pspec); |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 78 | break; |
| 79 | |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 80 | /* By default, only set on output */ |
| 81 | default: |
| 82 | if (!gst_v4l2_object_set_property_helper (self->v4l2output, |
| 83 | prop_id, value, pspec)) { |
| 84 | G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
| 85 | } |
| 86 | break; |
| 87 | } |
| 88 | } |
| 89 | |
| 90 | static void |
| 91 | gst_v4l2_transform_get_property (GObject * object, |
| 92 | guint prop_id, GValue * value, GParamSpec * pspec) |
| 93 | { |
| 94 | GstV4l2Transform *self = GST_V4L2_TRANSFORM (object); |
| 95 | |
| 96 | switch (prop_id) { |
Nicolas Dufresne | 077fcbc | 2014-05-15 18:08:53 -0400 | [diff] [blame] | 97 | case PROP_OUTPUT_IO_MODE: |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 98 | gst_v4l2_object_get_property_helper (self->v4l2output, prop_id, value, |
| 99 | pspec); |
| 100 | break; |
| 101 | case PROP_CAPTURE_IO_MODE: |
Nicolas Dufresne | 077fcbc | 2014-05-15 18:08:53 -0400 | [diff] [blame] | 102 | gst_v4l2_object_get_property_helper (self->v4l2capture, prop_id, value, |
| 103 | pspec); |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 104 | break; |
| 105 | |
| 106 | /* By default read from output */ |
| 107 | default: |
| 108 | if (!gst_v4l2_object_get_property_helper (self->v4l2output, |
| 109 | prop_id, value, pspec)) { |
| 110 | G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); |
| 111 | } |
| 112 | break; |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | static gboolean |
Nicolas Dufresne | 783417e | 2014-04-15 17:31:42 -0400 | [diff] [blame] | 117 | gst_v4l2_transform_open (GstV4l2Transform * self) |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 118 | { |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 119 | GST_DEBUG_OBJECT (self, "Opening"); |
| 120 | |
| 121 | if (!gst_v4l2_object_open (self->v4l2output)) |
| 122 | goto failure; |
| 123 | |
| 124 | if (!gst_v4l2_object_open_shared (self->v4l2capture, self->v4l2output)) |
| 125 | goto failure; |
| 126 | |
| 127 | self->probed_sinkcaps = gst_v4l2_object_get_caps (self->v4l2output, |
| 128 | gst_v4l2_object_get_raw_caps ()); |
| 129 | |
| 130 | if (gst_caps_is_empty (self->probed_sinkcaps)) |
| 131 | goto no_input_format; |
| 132 | |
| 133 | self->probed_srccaps = gst_v4l2_object_get_caps (self->v4l2capture, |
| 134 | gst_v4l2_object_get_raw_caps ()); |
| 135 | |
| 136 | if (gst_caps_is_empty (self->probed_srccaps)) |
| 137 | goto no_output_format; |
| 138 | |
| 139 | return TRUE; |
| 140 | |
| 141 | no_input_format: |
| 142 | GST_ELEMENT_ERROR (self, RESOURCE, SETTINGS, |
| 143 | (_("Converter on device %s has no supported input format"), |
| 144 | self->v4l2output->videodev), (NULL)); |
| 145 | goto failure; |
| 146 | |
| 147 | |
| 148 | no_output_format: |
| 149 | GST_ELEMENT_ERROR (self, RESOURCE, SETTINGS, |
| 150 | (_("Converter on device %s has no supported output format"), |
| 151 | self->v4l2output->videodev), (NULL)); |
| 152 | goto failure; |
| 153 | |
| 154 | failure: |
| 155 | if (GST_V4L2_IS_OPEN (self->v4l2output)) |
| 156 | gst_v4l2_object_close (self->v4l2output); |
| 157 | |
| 158 | if (GST_V4L2_IS_OPEN (self->v4l2capture)) |
| 159 | gst_v4l2_object_close (self->v4l2capture); |
| 160 | |
| 161 | gst_caps_replace (&self->probed_srccaps, NULL); |
| 162 | gst_caps_replace (&self->probed_sinkcaps, NULL); |
| 163 | |
| 164 | return FALSE; |
| 165 | } |
| 166 | |
Nicolas Dufresne | 783417e | 2014-04-15 17:31:42 -0400 | [diff] [blame] | 167 | static void |
| 168 | gst_v4l2_transform_close (GstV4l2Transform * self) |
| 169 | { |
| 170 | GST_DEBUG_OBJECT (self, "Closing"); |
| 171 | |
| 172 | gst_v4l2_object_close (self->v4l2output); |
| 173 | gst_v4l2_object_close (self->v4l2capture); |
| 174 | |
| 175 | gst_caps_replace (&self->probed_srccaps, NULL); |
Jean-Michel Hautbois | dd45e45 | 2015-08-20 14:45:33 +0200 | [diff] [blame] | 176 | gst_caps_replace (&self->probed_sinkcaps, NULL); |
Nicolas Dufresne | 783417e | 2014-04-15 17:31:42 -0400 | [diff] [blame] | 177 | } |
| 178 | |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 179 | static gboolean |
| 180 | gst_v4l2_transform_stop (GstBaseTransform * trans) |
| 181 | { |
| 182 | GstV4l2Transform *self = GST_V4L2_TRANSFORM (trans); |
| 183 | |
Nicolas Dufresne | 783417e | 2014-04-15 17:31:42 -0400 | [diff] [blame] | 184 | GST_DEBUG_OBJECT (self, "Stop"); |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 185 | |
Nicolas Dufresne | 6d5ffe8 | 2014-03-15 18:56:51 +0100 | [diff] [blame] | 186 | gst_v4l2_object_stop (self->v4l2output); |
| 187 | gst_v4l2_object_stop (self->v4l2capture); |
Nicolas Dufresne | 026f79b | 2014-04-15 16:43:15 -0400 | [diff] [blame] | 188 | gst_caps_replace (&self->incaps, NULL); |
| 189 | gst_caps_replace (&self->outcaps, NULL); |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 190 | |
| 191 | return TRUE; |
| 192 | } |
| 193 | |
| 194 | static gboolean |
| 195 | gst_v4l2_transform_set_caps (GstBaseTransform * trans, GstCaps * incaps, |
| 196 | GstCaps * outcaps) |
| 197 | { |
Nicolas Dufresne | 3b5cac3 | 2016-06-07 16:04:52 -0400 | [diff] [blame] | 198 | GstV4l2Error error = GST_V4L2_ERROR_INIT; |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 199 | GstV4l2Transform *self = GST_V4L2_TRANSFORM (trans); |
| 200 | |
Nicolas Dufresne | 026f79b | 2014-04-15 16:43:15 -0400 | [diff] [blame] | 201 | if (self->incaps && self->outcaps) { |
| 202 | if (gst_caps_is_equal (incaps, self->incaps) && |
| 203 | gst_caps_is_equal (outcaps, self->outcaps)) { |
| 204 | GST_DEBUG_OBJECT (trans, "Caps did not changed"); |
| 205 | return TRUE; |
| 206 | } |
| 207 | } |
| 208 | |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 209 | /* TODO Add renegotiation support */ |
| 210 | g_return_val_if_fail (!GST_V4L2_IS_ACTIVE (self->v4l2output), FALSE); |
| 211 | g_return_val_if_fail (!GST_V4L2_IS_ACTIVE (self->v4l2capture), FALSE); |
| 212 | |
Nicolas Dufresne | 026f79b | 2014-04-15 16:43:15 -0400 | [diff] [blame] | 213 | gst_caps_replace (&self->incaps, incaps); |
| 214 | gst_caps_replace (&self->outcaps, outcaps); |
| 215 | |
Nicolas Dufresne | 3b5cac3 | 2016-06-07 16:04:52 -0400 | [diff] [blame] | 216 | if (!gst_v4l2_object_set_format (self->v4l2output, incaps, &error)) |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 217 | goto incaps_failed; |
| 218 | |
Nicolas Dufresne | 3b5cac3 | 2016-06-07 16:04:52 -0400 | [diff] [blame] | 219 | if (!gst_v4l2_object_set_format (self->v4l2capture, outcaps, &error)) |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 220 | goto outcaps_failed; |
| 221 | |
Nicolas Dufresne | d4c24cc | 2014-03-20 15:31:22 -0400 | [diff] [blame] | 222 | /* FIXME implement fallback if crop not supported */ |
| 223 | if (!gst_v4l2_object_set_crop (self->v4l2output)) |
| 224 | goto failed; |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 225 | |
Nicolas Dufresne | d4c24cc | 2014-03-20 15:31:22 -0400 | [diff] [blame] | 226 | if (!gst_v4l2_object_set_crop (self->v4l2capture)) |
| 227 | goto failed; |
| 228 | |
| 229 | return TRUE; |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 230 | |
| 231 | incaps_failed: |
| 232 | { |
| 233 | GST_ERROR_OBJECT (self, "failed to set input caps: %" GST_PTR_FORMAT, |
| 234 | incaps); |
Nicolas Dufresne | 3b5cac3 | 2016-06-07 16:04:52 -0400 | [diff] [blame] | 235 | gst_v4l2_error (self, &error); |
Nicolas Dufresne | d4c24cc | 2014-03-20 15:31:22 -0400 | [diff] [blame] | 236 | goto failed; |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 237 | } |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 238 | outcaps_failed: |
| 239 | { |
| 240 | gst_v4l2_object_stop (self->v4l2output); |
| 241 | GST_ERROR_OBJECT (self, "failed to set output caps: %" GST_PTR_FORMAT, |
| 242 | outcaps); |
Nicolas Dufresne | 3b5cac3 | 2016-06-07 16:04:52 -0400 | [diff] [blame] | 243 | gst_v4l2_error (self, &error); |
Nicolas Dufresne | d4c24cc | 2014-03-20 15:31:22 -0400 | [diff] [blame] | 244 | goto failed; |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 245 | } |
Nicolas Dufresne | d4c24cc | 2014-03-20 15:31:22 -0400 | [diff] [blame] | 246 | failed: |
| 247 | return FALSE; |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 248 | } |
| 249 | |
| 250 | static gboolean |
| 251 | gst_v4l2_transform_query (GstBaseTransform * trans, GstPadDirection direction, |
| 252 | GstQuery * query) |
| 253 | { |
| 254 | GstV4l2Transform *self = GST_V4L2_TRANSFORM (trans); |
| 255 | gboolean ret = TRUE; |
| 256 | |
| 257 | switch (GST_QUERY_TYPE (query)) { |
| 258 | case GST_QUERY_CAPS:{ |
| 259 | GstCaps *filter, *caps = NULL, *result = NULL; |
| 260 | GstPad *pad, *otherpad; |
| 261 | |
| 262 | gst_query_parse_caps (query, &filter); |
| 263 | |
| 264 | if (direction == GST_PAD_SRC) { |
| 265 | pad = GST_BASE_TRANSFORM_SRC_PAD (trans); |
| 266 | otherpad = GST_BASE_TRANSFORM_SINK_PAD (trans); |
| 267 | if (self->probed_srccaps) |
| 268 | caps = gst_caps_ref (self->probed_srccaps); |
| 269 | } else { |
| 270 | pad = GST_BASE_TRANSFORM_SINK_PAD (trans); |
| 271 | otherpad = GST_BASE_TRANSFORM_SRC_PAD (trans); |
Nicolas Dufresne | a270dc7 | 2014-05-09 12:14:23 -0400 | [diff] [blame] | 272 | if (self->probed_sinkcaps) |
Nicolas Dufresne | f810196 | 2014-03-20 17:26:05 -0400 | [diff] [blame] | 273 | caps = gst_caps_ref (self->probed_sinkcaps); |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 274 | } |
| 275 | |
| 276 | if (!caps) |
| 277 | caps = gst_pad_get_pad_template_caps (pad); |
| 278 | |
| 279 | if (filter) { |
| 280 | GstCaps *tmp = caps; |
| 281 | caps = gst_caps_intersect_full (filter, tmp, GST_CAPS_INTERSECT_FIRST); |
| 282 | gst_caps_unref (tmp); |
| 283 | } |
| 284 | |
| 285 | result = gst_pad_peer_query_caps (otherpad, caps); |
| 286 | result = gst_caps_make_writable (result); |
| 287 | gst_caps_append (result, caps); |
| 288 | |
| 289 | GST_DEBUG_OBJECT (self, "Returning %s caps %" GST_PTR_FORMAT, |
| 290 | GST_PAD_NAME (pad), result); |
| 291 | |
| 292 | gst_query_set_caps_result (query, result); |
| 293 | gst_caps_unref (result); |
| 294 | break; |
| 295 | } |
| 296 | |
| 297 | default: |
| 298 | ret = GST_BASE_TRANSFORM_CLASS (parent_class)->query (trans, direction, |
| 299 | query); |
| 300 | break; |
| 301 | } |
| 302 | |
| 303 | return ret; |
| 304 | } |
| 305 | |
| 306 | static gboolean |
| 307 | gst_v4l2_transform_decide_allocation (GstBaseTransform * trans, |
| 308 | GstQuery * query) |
| 309 | { |
| 310 | GstV4l2Transform *self = GST_V4L2_TRANSFORM (trans); |
| 311 | gboolean ret = FALSE; |
| 312 | |
Nicolas Dufresne | deb40de | 2014-04-29 12:48:04 -0400 | [diff] [blame] | 313 | GST_DEBUG_OBJECT (self, "called"); |
| 314 | |
Nicolas Dufresne | 91efa79 | 2014-03-16 19:11:16 +0100 | [diff] [blame] | 315 | if (gst_v4l2_object_decide_allocation (self->v4l2capture, query)) { |
| 316 | GstBufferPool *pool = GST_BUFFER_POOL (self->v4l2capture->pool); |
| 317 | |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 318 | ret = GST_BASE_TRANSFORM_CLASS (parent_class)->decide_allocation (trans, |
| 319 | query); |
| 320 | |
Nicolas Dufresne | 91efa79 | 2014-03-16 19:11:16 +0100 | [diff] [blame] | 321 | if (!gst_buffer_pool_set_active (pool, TRUE)) |
| 322 | goto activate_failed; |
| 323 | } |
| 324 | |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 325 | return ret; |
Nicolas Dufresne | 91efa79 | 2014-03-16 19:11:16 +0100 | [diff] [blame] | 326 | |
| 327 | activate_failed: |
| 328 | GST_ELEMENT_ERROR (self, RESOURCE, SETTINGS, |
| 329 | ("failed to activate bufferpool"), ("failed to activate bufferpool")); |
Nicolas Dufresne | 1635697 | 2014-04-08 18:54:50 -0400 | [diff] [blame] | 330 | return TRUE; |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 331 | } |
| 332 | |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 333 | static gboolean |
| 334 | gst_v4l2_transform_propose_allocation (GstBaseTransform * trans, |
| 335 | GstQuery * decide_query, GstQuery * query) |
| 336 | { |
| 337 | GstV4l2Transform *self = GST_V4L2_TRANSFORM (trans); |
| 338 | gboolean ret = FALSE; |
| 339 | |
Nicolas Dufresne | deb40de | 2014-04-29 12:48:04 -0400 | [diff] [blame] | 340 | GST_DEBUG_OBJECT (self, "called"); |
| 341 | |
Nicolas Dufresne | 527df8b | 2014-03-27 13:21:25 -0400 | [diff] [blame] | 342 | if (decide_query == NULL) |
| 343 | ret = TRUE; |
| 344 | else |
| 345 | ret = gst_v4l2_object_propose_allocation (self->v4l2output, query); |
| 346 | |
| 347 | if (ret) |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 348 | ret = GST_BASE_TRANSFORM_CLASS (parent_class)->propose_allocation (trans, |
Nicolas Dufresne | 527df8b | 2014-03-27 13:21:25 -0400 | [diff] [blame] | 349 | decide_query, query); |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 350 | |
| 351 | return ret; |
| 352 | } |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 353 | |
| 354 | /* copies the given caps */ |
| 355 | static GstCaps * |
| 356 | gst_v4l2_transform_caps_remove_format_info (GstCaps * caps) |
| 357 | { |
| 358 | GstStructure *st; |
| 359 | GstCapsFeatures *f; |
| 360 | gint i, n; |
| 361 | GstCaps *res; |
| 362 | |
| 363 | res = gst_caps_new_empty (); |
| 364 | |
| 365 | n = gst_caps_get_size (caps); |
| 366 | for (i = 0; i < n; i++) { |
| 367 | st = gst_caps_get_structure (caps, i); |
| 368 | f = gst_caps_get_features (caps, i); |
| 369 | |
| 370 | /* If this is already expressed by the existing caps |
| 371 | * skip this structure */ |
| 372 | if (i > 0 && gst_caps_is_subset_structure_full (res, st, f)) |
| 373 | continue; |
| 374 | |
| 375 | st = gst_structure_copy (st); |
| 376 | /* Only remove format info for the cases when we can actually convert */ |
| 377 | if (!gst_caps_features_is_any (f) |
| 378 | && gst_caps_features_is_equal (f, |
| 379 | GST_CAPS_FEATURES_MEMORY_SYSTEM_MEMORY)) |
| 380 | gst_structure_remove_fields (st, "format", "colorimetry", "chroma-site", |
Philipp Zabel | 3eeef5f | 2016-05-20 12:49:53 +0200 | [diff] [blame] | 381 | "width", "height", "pixel-aspect-ratio", NULL); |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 382 | |
| 383 | gst_caps_append_structure_full (res, st, gst_caps_features_copy (f)); |
| 384 | } |
| 385 | |
| 386 | return res; |
| 387 | } |
| 388 | |
| 389 | /* The caps can be transformed into any other caps with format info removed. |
| 390 | * However, we should prefer passthrough, so if passthrough is possible, |
| 391 | * put it first in the list. */ |
| 392 | static GstCaps * |
| 393 | gst_v4l2_transform_transform_caps (GstBaseTransform * btrans, |
| 394 | GstPadDirection direction, GstCaps * caps, GstCaps * filter) |
| 395 | { |
| 396 | GstCaps *tmp, *tmp2; |
| 397 | GstCaps *result; |
| 398 | |
| 399 | /* Get all possible caps that we can transform to */ |
| 400 | tmp = gst_v4l2_transform_caps_remove_format_info (caps); |
| 401 | |
| 402 | if (filter) { |
| 403 | tmp2 = gst_caps_intersect_full (filter, tmp, GST_CAPS_INTERSECT_FIRST); |
| 404 | gst_caps_unref (tmp); |
| 405 | tmp = tmp2; |
| 406 | } |
| 407 | |
| 408 | result = tmp; |
| 409 | |
| 410 | GST_DEBUG_OBJECT (btrans, "transformed %" GST_PTR_FORMAT " into %" |
| 411 | GST_PTR_FORMAT, caps, result); |
| 412 | |
| 413 | return result; |
| 414 | } |
| 415 | |
| 416 | static GstCaps * |
| 417 | gst_v4l2_transform_fixate_caps (GstBaseTransform * trans, |
| 418 | GstPadDirection direction, GstCaps * caps, GstCaps * othercaps) |
| 419 | { |
Enrico Jorns | 3067a60 | 2015-01-09 11:36:11 +0100 | [diff] [blame] | 420 | GstStructure *ins, *outs; |
| 421 | const GValue *from_par, *to_par; |
| 422 | GValue fpar = { 0, }, tpar = { |
| 423 | 0,}; |
| 424 | |
| 425 | othercaps = gst_caps_truncate (othercaps); |
| 426 | othercaps = gst_caps_make_writable (othercaps); |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 427 | |
| 428 | GST_DEBUG_OBJECT (trans, "trying to fixate othercaps %" GST_PTR_FORMAT |
| 429 | " based on caps %" GST_PTR_FORMAT, othercaps, caps); |
| 430 | |
Enrico Jorns | 3067a60 | 2015-01-09 11:36:11 +0100 | [diff] [blame] | 431 | ins = gst_caps_get_structure (caps, 0); |
| 432 | outs = gst_caps_get_structure (othercaps, 0); |
| 433 | |
Enrico Jorns | 5829f32 | 2015-01-28 12:07:58 +0100 | [diff] [blame] | 434 | { |
| 435 | const gchar *in_format; |
| 436 | |
| 437 | in_format = gst_structure_get_string (ins, "format"); |
| 438 | if (in_format) { |
| 439 | /* Try to set output format for pass through */ |
| 440 | gst_structure_fixate_field_string (outs, "format", in_format); |
| 441 | } |
| 442 | |
| 443 | } |
| 444 | |
Enrico Jorns | 3067a60 | 2015-01-09 11:36:11 +0100 | [diff] [blame] | 445 | from_par = gst_structure_get_value (ins, "pixel-aspect-ratio"); |
| 446 | to_par = gst_structure_get_value (outs, "pixel-aspect-ratio"); |
| 447 | |
| 448 | /* If we're fixating from the sinkpad we always set the PAR and |
| 449 | * assume that missing PAR on the sinkpad means 1/1 and |
| 450 | * missing PAR on the srcpad means undefined |
| 451 | */ |
| 452 | if (direction == GST_PAD_SINK) { |
| 453 | if (!from_par) { |
| 454 | g_value_init (&fpar, GST_TYPE_FRACTION); |
| 455 | gst_value_set_fraction (&fpar, 1, 1); |
| 456 | from_par = &fpar; |
| 457 | } |
| 458 | if (!to_par) { |
| 459 | g_value_init (&tpar, GST_TYPE_FRACTION_RANGE); |
| 460 | gst_value_set_fraction_range_full (&tpar, 1, G_MAXINT, G_MAXINT, 1); |
| 461 | to_par = &tpar; |
| 462 | } |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 463 | } else { |
Enrico Jorns | 3067a60 | 2015-01-09 11:36:11 +0100 | [diff] [blame] | 464 | if (!to_par) { |
| 465 | g_value_init (&tpar, GST_TYPE_FRACTION); |
| 466 | gst_value_set_fraction (&tpar, 1, 1); |
| 467 | to_par = &tpar; |
| 468 | |
| 469 | gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION, 1, 1, |
| 470 | NULL); |
| 471 | } |
| 472 | if (!from_par) { |
| 473 | g_value_init (&fpar, GST_TYPE_FRACTION); |
| 474 | gst_value_set_fraction (&fpar, 1, 1); |
| 475 | from_par = &fpar; |
| 476 | } |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 477 | } |
| 478 | |
Enrico Jorns | 3067a60 | 2015-01-09 11:36:11 +0100 | [diff] [blame] | 479 | /* we have both PAR but they might not be fixated */ |
| 480 | { |
| 481 | gint from_w, from_h, from_par_n, from_par_d, to_par_n, to_par_d; |
| 482 | gint w = 0, h = 0; |
| 483 | gint from_dar_n, from_dar_d; |
| 484 | gint num, den; |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 485 | |
Enrico Jorns | 3067a60 | 2015-01-09 11:36:11 +0100 | [diff] [blame] | 486 | /* from_par should be fixed */ |
| 487 | g_return_val_if_fail (gst_value_is_fixed (from_par), othercaps); |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 488 | |
Enrico Jorns | 3067a60 | 2015-01-09 11:36:11 +0100 | [diff] [blame] | 489 | from_par_n = gst_value_get_fraction_numerator (from_par); |
| 490 | from_par_d = gst_value_get_fraction_denominator (from_par); |
| 491 | |
| 492 | gst_structure_get_int (ins, "width", &from_w); |
| 493 | gst_structure_get_int (ins, "height", &from_h); |
| 494 | |
| 495 | gst_structure_get_int (outs, "width", &w); |
| 496 | gst_structure_get_int (outs, "height", &h); |
| 497 | |
| 498 | /* if both width and height are already fixed, we can't do anything |
| 499 | * about it anymore */ |
| 500 | if (w && h) { |
| 501 | guint n, d; |
| 502 | |
| 503 | GST_DEBUG_OBJECT (trans, "dimensions already set to %dx%d, not fixating", |
| 504 | w, h); |
| 505 | if (!gst_value_is_fixed (to_par)) { |
| 506 | if (gst_video_calculate_display_ratio (&n, &d, from_w, from_h, |
| 507 | from_par_n, from_par_d, w, h)) { |
| 508 | GST_DEBUG_OBJECT (trans, "fixating to_par to %dx%d", n, d); |
| 509 | if (gst_structure_has_field (outs, "pixel-aspect-ratio")) |
| 510 | gst_structure_fixate_field_nearest_fraction (outs, |
| 511 | "pixel-aspect-ratio", n, d); |
| 512 | else if (n != d) |
| 513 | gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION, |
| 514 | n, d, NULL); |
| 515 | } |
| 516 | } |
| 517 | goto done; |
| 518 | } |
| 519 | |
| 520 | /* Calculate input DAR */ |
| 521 | if (!gst_util_fraction_multiply (from_w, from_h, from_par_n, from_par_d, |
| 522 | &from_dar_n, &from_dar_d)) { |
| 523 | GST_ELEMENT_ERROR (trans, CORE, NEGOTIATION, (NULL), |
| 524 | ("Error calculating the output scaled size - integer overflow")); |
| 525 | goto done; |
| 526 | } |
| 527 | |
| 528 | GST_DEBUG_OBJECT (trans, "Input DAR is %d/%d", from_dar_n, from_dar_d); |
| 529 | |
| 530 | /* If either width or height are fixed there's not much we |
| 531 | * can do either except choosing a height or width and PAR |
| 532 | * that matches the DAR as good as possible |
| 533 | */ |
| 534 | if (h) { |
| 535 | GstStructure *tmp; |
| 536 | gint set_w, set_par_n, set_par_d; |
| 537 | |
| 538 | GST_DEBUG_OBJECT (trans, "height is fixed (%d)", h); |
| 539 | |
| 540 | /* If the PAR is fixed too, there's not much to do |
| 541 | * except choosing the width that is nearest to the |
| 542 | * width with the same DAR */ |
| 543 | if (gst_value_is_fixed (to_par)) { |
| 544 | to_par_n = gst_value_get_fraction_numerator (to_par); |
| 545 | to_par_d = gst_value_get_fraction_denominator (to_par); |
| 546 | |
| 547 | GST_DEBUG_OBJECT (trans, "PAR is fixed %d/%d", to_par_n, to_par_d); |
| 548 | |
| 549 | if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, to_par_d, |
| 550 | to_par_n, &num, &den)) { |
| 551 | GST_ELEMENT_ERROR (trans, CORE, NEGOTIATION, (NULL), |
| 552 | ("Error calculating the output scaled size - integer overflow")); |
| 553 | goto done; |
| 554 | } |
| 555 | |
| 556 | w = (guint) gst_util_uint64_scale_int (h, num, den); |
| 557 | gst_structure_fixate_field_nearest_int (outs, "width", w); |
| 558 | |
| 559 | goto done; |
| 560 | } |
| 561 | |
| 562 | /* The PAR is not fixed and it's quite likely that we can set |
| 563 | * an arbitrary PAR. */ |
| 564 | |
| 565 | /* Check if we can keep the input width */ |
| 566 | tmp = gst_structure_copy (outs); |
| 567 | gst_structure_fixate_field_nearest_int (tmp, "width", from_w); |
| 568 | gst_structure_get_int (tmp, "width", &set_w); |
| 569 | |
| 570 | /* Might have failed but try to keep the DAR nonetheless by |
| 571 | * adjusting the PAR */ |
| 572 | if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, h, set_w, |
| 573 | &to_par_n, &to_par_d)) { |
| 574 | GST_ELEMENT_ERROR (trans, CORE, NEGOTIATION, (NULL), |
| 575 | ("Error calculating the output scaled size - integer overflow")); |
| 576 | gst_structure_free (tmp); |
| 577 | goto done; |
| 578 | } |
| 579 | |
| 580 | if (!gst_structure_has_field (tmp, "pixel-aspect-ratio")) |
| 581 | gst_structure_set_value (tmp, "pixel-aspect-ratio", to_par); |
| 582 | gst_structure_fixate_field_nearest_fraction (tmp, "pixel-aspect-ratio", |
| 583 | to_par_n, to_par_d); |
| 584 | gst_structure_get_fraction (tmp, "pixel-aspect-ratio", &set_par_n, |
| 585 | &set_par_d); |
| 586 | gst_structure_free (tmp); |
| 587 | |
| 588 | /* Check if the adjusted PAR is accepted */ |
| 589 | if (set_par_n == to_par_n && set_par_d == to_par_d) { |
| 590 | if (gst_structure_has_field (outs, "pixel-aspect-ratio") || |
| 591 | set_par_n != set_par_d) |
| 592 | gst_structure_set (outs, "width", G_TYPE_INT, set_w, |
| 593 | "pixel-aspect-ratio", GST_TYPE_FRACTION, set_par_n, set_par_d, |
| 594 | NULL); |
| 595 | goto done; |
| 596 | } |
| 597 | |
| 598 | /* Otherwise scale the width to the new PAR and check if the |
| 599 | * adjusted with is accepted. If all that fails we can't keep |
| 600 | * the DAR */ |
| 601 | if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, set_par_d, |
| 602 | set_par_n, &num, &den)) { |
| 603 | GST_ELEMENT_ERROR (trans, CORE, NEGOTIATION, (NULL), |
| 604 | ("Error calculating the output scaled size - integer overflow")); |
| 605 | goto done; |
| 606 | } |
| 607 | |
| 608 | w = (guint) gst_util_uint64_scale_int (h, num, den); |
| 609 | gst_structure_fixate_field_nearest_int (outs, "width", w); |
| 610 | if (gst_structure_has_field (outs, "pixel-aspect-ratio") || |
| 611 | set_par_n != set_par_d) |
| 612 | gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION, |
| 613 | set_par_n, set_par_d, NULL); |
| 614 | |
| 615 | goto done; |
| 616 | } else if (w) { |
| 617 | GstStructure *tmp; |
| 618 | gint set_h, set_par_n, set_par_d; |
| 619 | |
| 620 | GST_DEBUG_OBJECT (trans, "width is fixed (%d)", w); |
| 621 | |
| 622 | /* If the PAR is fixed too, there's not much to do |
| 623 | * except choosing the height that is nearest to the |
| 624 | * height with the same DAR */ |
| 625 | if (gst_value_is_fixed (to_par)) { |
| 626 | to_par_n = gst_value_get_fraction_numerator (to_par); |
| 627 | to_par_d = gst_value_get_fraction_denominator (to_par); |
| 628 | |
| 629 | GST_DEBUG_OBJECT (trans, "PAR is fixed %d/%d", to_par_n, to_par_d); |
| 630 | |
| 631 | if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, to_par_d, |
| 632 | to_par_n, &num, &den)) { |
| 633 | GST_ELEMENT_ERROR (trans, CORE, NEGOTIATION, (NULL), |
| 634 | ("Error calculating the output scaled size - integer overflow")); |
| 635 | goto done; |
| 636 | } |
| 637 | |
| 638 | h = (guint) gst_util_uint64_scale_int (w, den, num); |
| 639 | gst_structure_fixate_field_nearest_int (outs, "height", h); |
| 640 | |
| 641 | goto done; |
| 642 | } |
| 643 | |
| 644 | /* The PAR is not fixed and it's quite likely that we can set |
| 645 | * an arbitrary PAR. */ |
| 646 | |
| 647 | /* Check if we can keep the input height */ |
| 648 | tmp = gst_structure_copy (outs); |
| 649 | gst_structure_fixate_field_nearest_int (tmp, "height", from_h); |
| 650 | gst_structure_get_int (tmp, "height", &set_h); |
| 651 | |
| 652 | /* Might have failed but try to keep the DAR nonetheless by |
| 653 | * adjusting the PAR */ |
| 654 | if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, set_h, w, |
| 655 | &to_par_n, &to_par_d)) { |
| 656 | GST_ELEMENT_ERROR (trans, CORE, NEGOTIATION, (NULL), |
| 657 | ("Error calculating the output scaled size - integer overflow")); |
| 658 | gst_structure_free (tmp); |
| 659 | goto done; |
| 660 | } |
| 661 | if (!gst_structure_has_field (tmp, "pixel-aspect-ratio")) |
| 662 | gst_structure_set_value (tmp, "pixel-aspect-ratio", to_par); |
| 663 | gst_structure_fixate_field_nearest_fraction (tmp, "pixel-aspect-ratio", |
| 664 | to_par_n, to_par_d); |
| 665 | gst_structure_get_fraction (tmp, "pixel-aspect-ratio", &set_par_n, |
| 666 | &set_par_d); |
| 667 | gst_structure_free (tmp); |
| 668 | |
| 669 | /* Check if the adjusted PAR is accepted */ |
| 670 | if (set_par_n == to_par_n && set_par_d == to_par_d) { |
| 671 | if (gst_structure_has_field (outs, "pixel-aspect-ratio") || |
| 672 | set_par_n != set_par_d) |
| 673 | gst_structure_set (outs, "height", G_TYPE_INT, set_h, |
| 674 | "pixel-aspect-ratio", GST_TYPE_FRACTION, set_par_n, set_par_d, |
| 675 | NULL); |
| 676 | goto done; |
| 677 | } |
| 678 | |
| 679 | /* Otherwise scale the height to the new PAR and check if the |
| 680 | * adjusted with is accepted. If all that fails we can't keep |
| 681 | * the DAR */ |
| 682 | if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, set_par_d, |
| 683 | set_par_n, &num, &den)) { |
| 684 | GST_ELEMENT_ERROR (trans, CORE, NEGOTIATION, (NULL), |
| 685 | ("Error calculating the output scaled size - integer overflow")); |
| 686 | goto done; |
| 687 | } |
| 688 | |
| 689 | h = (guint) gst_util_uint64_scale_int (w, den, num); |
| 690 | gst_structure_fixate_field_nearest_int (outs, "height", h); |
| 691 | if (gst_structure_has_field (outs, "pixel-aspect-ratio") || |
| 692 | set_par_n != set_par_d) |
| 693 | gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION, |
| 694 | set_par_n, set_par_d, NULL); |
| 695 | |
| 696 | goto done; |
| 697 | } else if (gst_value_is_fixed (to_par)) { |
| 698 | GstStructure *tmp; |
| 699 | gint set_h, set_w, f_h, f_w; |
| 700 | |
| 701 | to_par_n = gst_value_get_fraction_numerator (to_par); |
| 702 | to_par_d = gst_value_get_fraction_denominator (to_par); |
| 703 | |
Philipp Zabel | 89a2f0a | 2016-05-20 12:32:25 +0200 | [diff] [blame] | 704 | GST_DEBUG_OBJECT (trans, "PAR is fixed %d/%d", to_par_n, to_par_d); |
| 705 | |
Enrico Jorns | 3067a60 | 2015-01-09 11:36:11 +0100 | [diff] [blame] | 706 | /* Calculate scale factor for the PAR change */ |
Philipp Zabel | 89a2f0a | 2016-05-20 12:32:25 +0200 | [diff] [blame] | 707 | if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, to_par_d, |
| 708 | to_par_n, &num, &den)) { |
Enrico Jorns | 3067a60 | 2015-01-09 11:36:11 +0100 | [diff] [blame] | 709 | GST_ELEMENT_ERROR (trans, CORE, NEGOTIATION, (NULL), |
| 710 | ("Error calculating the output scaled size - integer overflow")); |
| 711 | goto done; |
| 712 | } |
| 713 | |
| 714 | /* Try to keep the input height (because of interlacing) */ |
| 715 | tmp = gst_structure_copy (outs); |
| 716 | gst_structure_fixate_field_nearest_int (tmp, "height", from_h); |
| 717 | gst_structure_get_int (tmp, "height", &set_h); |
| 718 | |
| 719 | /* This might have failed but try to scale the width |
| 720 | * to keep the DAR nonetheless */ |
| 721 | w = (guint) gst_util_uint64_scale_int (set_h, num, den); |
| 722 | gst_structure_fixate_field_nearest_int (tmp, "width", w); |
| 723 | gst_structure_get_int (tmp, "width", &set_w); |
| 724 | gst_structure_free (tmp); |
| 725 | |
| 726 | /* We kept the DAR and the height is nearest to the original height */ |
| 727 | if (set_w == w) { |
| 728 | gst_structure_set (outs, "width", G_TYPE_INT, set_w, "height", |
| 729 | G_TYPE_INT, set_h, NULL); |
| 730 | goto done; |
| 731 | } |
| 732 | |
| 733 | f_h = set_h; |
| 734 | f_w = set_w; |
| 735 | |
| 736 | /* If the former failed, try to keep the input width at least */ |
| 737 | tmp = gst_structure_copy (outs); |
| 738 | gst_structure_fixate_field_nearest_int (tmp, "width", from_w); |
| 739 | gst_structure_get_int (tmp, "width", &set_w); |
| 740 | |
| 741 | /* This might have failed but try to scale the width |
| 742 | * to keep the DAR nonetheless */ |
| 743 | h = (guint) gst_util_uint64_scale_int (set_w, den, num); |
| 744 | gst_structure_fixate_field_nearest_int (tmp, "height", h); |
| 745 | gst_structure_get_int (tmp, "height", &set_h); |
| 746 | gst_structure_free (tmp); |
| 747 | |
| 748 | /* We kept the DAR and the width is nearest to the original width */ |
| 749 | if (set_h == h) { |
| 750 | gst_structure_set (outs, "width", G_TYPE_INT, set_w, "height", |
| 751 | G_TYPE_INT, set_h, NULL); |
| 752 | goto done; |
| 753 | } |
| 754 | |
| 755 | /* If all this failed, keep the height that was nearest to the orignal |
| 756 | * height and the nearest possible width. This changes the DAR but |
| 757 | * there's not much else to do here. |
| 758 | */ |
| 759 | gst_structure_set (outs, "width", G_TYPE_INT, f_w, "height", G_TYPE_INT, |
| 760 | f_h, NULL); |
| 761 | goto done; |
| 762 | } else { |
| 763 | GstStructure *tmp; |
| 764 | gint set_h, set_w, set_par_n, set_par_d, tmp2; |
| 765 | |
| 766 | /* width, height and PAR are not fixed but passthrough is not possible */ |
| 767 | |
| 768 | /* First try to keep the height and width as good as possible |
| 769 | * and scale PAR */ |
| 770 | tmp = gst_structure_copy (outs); |
| 771 | gst_structure_fixate_field_nearest_int (tmp, "height", from_h); |
| 772 | gst_structure_get_int (tmp, "height", &set_h); |
| 773 | gst_structure_fixate_field_nearest_int (tmp, "width", from_w); |
| 774 | gst_structure_get_int (tmp, "width", &set_w); |
| 775 | |
| 776 | if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, set_h, set_w, |
| 777 | &to_par_n, &to_par_d)) { |
| 778 | GST_ELEMENT_ERROR (trans, CORE, NEGOTIATION, (NULL), |
| 779 | ("Error calculating the output scaled size - integer overflow")); |
Luis de Bethencourt | 911f7b3 | 2015-07-02 14:34:57 +0100 | [diff] [blame] | 780 | gst_structure_free (tmp); |
Enrico Jorns | 3067a60 | 2015-01-09 11:36:11 +0100 | [diff] [blame] | 781 | goto done; |
| 782 | } |
| 783 | |
| 784 | if (!gst_structure_has_field (tmp, "pixel-aspect-ratio")) |
| 785 | gst_structure_set_value (tmp, "pixel-aspect-ratio", to_par); |
| 786 | gst_structure_fixate_field_nearest_fraction (tmp, "pixel-aspect-ratio", |
| 787 | to_par_n, to_par_d); |
| 788 | gst_structure_get_fraction (tmp, "pixel-aspect-ratio", &set_par_n, |
| 789 | &set_par_d); |
| 790 | gst_structure_free (tmp); |
| 791 | |
| 792 | if (set_par_n == to_par_n && set_par_d == to_par_d) { |
| 793 | gst_structure_set (outs, "width", G_TYPE_INT, set_w, "height", |
| 794 | G_TYPE_INT, set_h, NULL); |
| 795 | |
| 796 | if (gst_structure_has_field (outs, "pixel-aspect-ratio") || |
| 797 | set_par_n != set_par_d) |
| 798 | gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION, |
| 799 | set_par_n, set_par_d, NULL); |
| 800 | goto done; |
| 801 | } |
| 802 | |
| 803 | /* Otherwise try to scale width to keep the DAR with the set |
| 804 | * PAR and height */ |
| 805 | if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, set_par_d, |
| 806 | set_par_n, &num, &den)) { |
| 807 | GST_ELEMENT_ERROR (trans, CORE, NEGOTIATION, (NULL), |
| 808 | ("Error calculating the output scaled size - integer overflow")); |
| 809 | goto done; |
| 810 | } |
| 811 | |
| 812 | w = (guint) gst_util_uint64_scale_int (set_h, num, den); |
| 813 | tmp = gst_structure_copy (outs); |
| 814 | gst_structure_fixate_field_nearest_int (tmp, "width", w); |
| 815 | gst_structure_get_int (tmp, "width", &tmp2); |
| 816 | gst_structure_free (tmp); |
| 817 | |
| 818 | if (tmp2 == w) { |
| 819 | gst_structure_set (outs, "width", G_TYPE_INT, tmp2, "height", |
| 820 | G_TYPE_INT, set_h, NULL); |
| 821 | if (gst_structure_has_field (outs, "pixel-aspect-ratio") || |
| 822 | set_par_n != set_par_d) |
| 823 | gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION, |
| 824 | set_par_n, set_par_d, NULL); |
| 825 | goto done; |
| 826 | } |
| 827 | |
| 828 | /* ... or try the same with the height */ |
| 829 | h = (guint) gst_util_uint64_scale_int (set_w, den, num); |
| 830 | tmp = gst_structure_copy (outs); |
| 831 | gst_structure_fixate_field_nearest_int (tmp, "height", h); |
| 832 | gst_structure_get_int (tmp, "height", &tmp2); |
| 833 | gst_structure_free (tmp); |
| 834 | |
| 835 | if (tmp2 == h) { |
| 836 | gst_structure_set (outs, "width", G_TYPE_INT, set_w, "height", |
| 837 | G_TYPE_INT, tmp2, NULL); |
| 838 | if (gst_structure_has_field (outs, "pixel-aspect-ratio") || |
| 839 | set_par_n != set_par_d) |
| 840 | gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION, |
| 841 | set_par_n, set_par_d, NULL); |
| 842 | goto done; |
| 843 | } |
| 844 | |
| 845 | /* If all fails we can't keep the DAR and take the nearest values |
| 846 | * for everything from the first try */ |
| 847 | gst_structure_set (outs, "width", G_TYPE_INT, set_w, "height", |
| 848 | G_TYPE_INT, set_h, NULL); |
| 849 | if (gst_structure_has_field (outs, "pixel-aspect-ratio") || |
| 850 | set_par_n != set_par_d) |
| 851 | gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION, |
| 852 | set_par_n, set_par_d, NULL); |
| 853 | } |
| 854 | } |
| 855 | |
| 856 | done: |
| 857 | GST_DEBUG_OBJECT (trans, "fixated othercaps to %" GST_PTR_FORMAT, othercaps); |
| 858 | |
| 859 | if (from_par == &fpar) |
| 860 | g_value_unset (&fpar); |
| 861 | if (to_par == &tpar) |
| 862 | g_value_unset (&tpar); |
| 863 | |
Enrico Jorns | 5829f32 | 2015-01-28 12:07:58 +0100 | [diff] [blame] | 864 | /* fixate remaining fields */ |
| 865 | othercaps = gst_caps_fixate (othercaps); |
| 866 | |
Nicolas Dufresne | f9e01a5 | 2016-06-06 17:54:10 -0400 | [diff] [blame] | 867 | if (direction == GST_PAD_SINK) { |
| 868 | if (gst_caps_is_subset (caps, othercaps)) { |
| 869 | gst_caps_replace (&othercaps, caps); |
| 870 | } |
| 871 | } |
| 872 | |
Enrico Jorns | 3067a60 | 2015-01-09 11:36:11 +0100 | [diff] [blame] | 873 | return othercaps; |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 874 | } |
| 875 | |
| 876 | static GstFlowReturn |
| 877 | gst_v4l2_transform_prepare_output_buffer (GstBaseTransform * trans, |
| 878 | GstBuffer * inbuf, GstBuffer ** outbuf) |
| 879 | { |
| 880 | GstV4l2Transform *self = GST_V4L2_TRANSFORM (trans); |
| 881 | GstBufferPool *pool = GST_BUFFER_POOL (self->v4l2output->pool); |
| 882 | GstFlowReturn ret = GST_FLOW_OK; |
VÃctor Manuel Jáquez Leal | 4f7ee5c | 2014-03-15 16:53:54 +0000 | [diff] [blame] | 883 | GstBaseTransformClass *bclass = GST_BASE_TRANSFORM_CLASS (parent_class); |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 884 | |
| 885 | if (gst_base_transform_is_passthrough (trans)) { |
| 886 | GST_DEBUG_OBJECT (self, "Passthrough, no need to do anything"); |
| 887 | *outbuf = inbuf; |
| 888 | goto beach; |
| 889 | } |
| 890 | |
Nicolas Dufresne | 91efa79 | 2014-03-16 19:11:16 +0100 | [diff] [blame] | 891 | /* Ensure input internal pool is active */ |
Nicolas Dufresne | 23e273a | 2014-04-15 16:43:41 -0400 | [diff] [blame] | 892 | if (!gst_buffer_pool_is_active (pool)) { |
| 893 | GstStructure *config = gst_buffer_pool_get_config (pool); |
Pablo Anton | 927ba93 | 2015-05-21 17:41:12 +0200 | [diff] [blame] | 894 | gint min = self->v4l2output->min_buffers == 0 ? GST_V4L2_MIN_BUFFERS : |
| 895 | self->v4l2output->min_buffers; |
Nicolas Dufresne | 23e273a | 2014-04-15 16:43:41 -0400 | [diff] [blame] | 896 | gst_buffer_pool_config_set_params (config, self->incaps, |
Pablo Anton | 927ba93 | 2015-05-21 17:41:12 +0200 | [diff] [blame] | 897 | self->v4l2output->info.size, min, min); |
Nicolas Dufresne | 23e273a | 2014-04-15 16:43:41 -0400 | [diff] [blame] | 898 | |
| 899 | /* There is no reason to refuse this config */ |
| 900 | if (!gst_buffer_pool_set_config (pool, config)) |
| 901 | goto activate_failed; |
| 902 | |
| 903 | if (!gst_buffer_pool_set_active (pool, TRUE)) |
| 904 | goto activate_failed; |
| 905 | } |
Nicolas Dufresne | 91efa79 | 2014-03-16 19:11:16 +0100 | [diff] [blame] | 906 | |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 907 | GST_DEBUG_OBJECT (self, "Queue input buffer"); |
Nicolas Dufresne | deb40de | 2014-04-29 12:48:04 -0400 | [diff] [blame] | 908 | ret = gst_v4l2_buffer_pool_process (GST_V4L2_BUFFER_POOL (pool), &inbuf); |
Nicolas Dufresne | 91efa79 | 2014-03-16 19:11:16 +0100 | [diff] [blame] | 909 | if (G_UNLIKELY (ret != GST_FLOW_OK)) |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 910 | goto beach; |
| 911 | |
Nicolas Dufresne | b9992e4 | 2014-11-16 12:34:17 -0500 | [diff] [blame] | 912 | do { |
| 913 | pool = gst_base_transform_get_buffer_pool (trans); |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 914 | |
Nicolas Dufresne | b9992e4 | 2014-11-16 12:34:17 -0500 | [diff] [blame] | 915 | if (!gst_buffer_pool_set_active (pool, TRUE)) |
| 916 | goto activate_failed; |
Nicolas Dufresne | 10b67e9 | 2014-03-18 17:33:38 -0400 | [diff] [blame] | 917 | |
Nicolas Dufresne | b9992e4 | 2014-11-16 12:34:17 -0500 | [diff] [blame] | 918 | GST_DEBUG_OBJECT (self, "Dequeue output buffer"); |
| 919 | ret = gst_buffer_pool_acquire_buffer (pool, outbuf, NULL); |
| 920 | g_object_unref (pool); |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 921 | |
Nicolas Dufresne | b9992e4 | 2014-11-16 12:34:17 -0500 | [diff] [blame] | 922 | if (ret != GST_FLOW_OK) |
| 923 | goto alloc_failed; |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 924 | |
Nicolas Dufresne | b9992e4 | 2014-11-16 12:34:17 -0500 | [diff] [blame] | 925 | pool = self->v4l2capture->pool; |
| 926 | ret = gst_v4l2_buffer_pool_process (GST_V4L2_BUFFER_POOL (pool), outbuf); |
| 927 | |
| 928 | } while (ret == GST_V4L2_FLOW_CORRUPTED_BUFFER); |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 929 | |
| 930 | if (ret != GST_FLOW_OK) { |
| 931 | gst_buffer_unref (*outbuf); |
| 932 | *outbuf = NULL; |
| 933 | } |
| 934 | |
VÃctor Manuel Jáquez Leal | 4f7ee5c | 2014-03-15 16:53:54 +0000 | [diff] [blame] | 935 | if (bclass->copy_metadata) |
| 936 | if (!bclass->copy_metadata (trans, inbuf, *outbuf)) { |
| 937 | /* something failed, post a warning */ |
| 938 | GST_ELEMENT_WARNING (self, STREAM, NOT_IMPLEMENTED, |
| 939 | ("could not copy metadata"), (NULL)); |
| 940 | } |
| 941 | |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 942 | beach: |
| 943 | return ret; |
| 944 | |
| 945 | activate_failed: |
| 946 | GST_ELEMENT_ERROR (self, RESOURCE, SETTINGS, |
| 947 | ("failed to activate bufferpool"), ("failed to activate bufferpool")); |
Nicolas Dufresne | 5f10d2b | 2014-05-14 17:18:52 -0400 | [diff] [blame] | 948 | g_object_unref (pool); |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 949 | return GST_FLOW_ERROR; |
| 950 | |
| 951 | alloc_failed: |
| 952 | GST_DEBUG_OBJECT (self, "could not allocate buffer from pool"); |
| 953 | return ret; |
| 954 | } |
| 955 | |
| 956 | static GstFlowReturn |
| 957 | gst_v4l2_transform_transform (GstBaseTransform * trans, GstBuffer * inbuf, |
| 958 | GstBuffer * outbuf) |
| 959 | { |
| 960 | /* Nothing to do */ |
| 961 | return GST_FLOW_OK; |
| 962 | } |
| 963 | |
| 964 | static gboolean |
| 965 | gst_v4l2_transform_sink_event (GstBaseTransform * trans, GstEvent * event) |
| 966 | { |
| 967 | GstV4l2Transform *self = GST_V4L2_TRANSFORM (trans); |
Nicolas Dufresne | a4b5811 | 2014-05-14 17:18:35 -0400 | [diff] [blame] | 968 | gboolean ret; |
| 969 | |
| 970 | /* Nothing to flush in passthrough */ |
| 971 | if (gst_base_transform_is_passthrough (trans)) |
| 972 | return GST_BASE_TRANSFORM_CLASS (parent_class)->sink_event (trans, event); |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 973 | |
| 974 | switch (GST_EVENT_TYPE (event)) { |
| 975 | case GST_EVENT_FLUSH_START: |
Nicolas Dufresne | 6f5edb3 | 2014-04-29 14:56:31 -0400 | [diff] [blame] | 976 | GST_DEBUG_OBJECT (self, "flush start"); |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 977 | gst_v4l2_object_unlock (self->v4l2output); |
| 978 | gst_v4l2_object_unlock (self->v4l2capture); |
Nicolas Dufresne | bf19184 | 2014-05-09 12:11:54 -0400 | [diff] [blame] | 979 | break; |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 980 | default: |
| 981 | break; |
| 982 | } |
| 983 | |
Nicolas Dufresne | a4b5811 | 2014-05-14 17:18:35 -0400 | [diff] [blame] | 984 | ret = GST_BASE_TRANSFORM_CLASS (parent_class)->sink_event (trans, event); |
| 985 | |
| 986 | switch (GST_EVENT_TYPE (event)) { |
| 987 | case GST_EVENT_FLUSH_STOP: |
| 988 | /* Buffer should be back now */ |
Nicolas Dufresne | e2fd7e2 | 2014-05-24 20:20:07 -0400 | [diff] [blame] | 989 | GST_DEBUG_OBJECT (self, "flush stop"); |
| 990 | gst_v4l2_object_unlock_stop (self->v4l2capture); |
| 991 | gst_v4l2_object_unlock_stop (self->v4l2output); |
Nicolas Dufresne | 1f902e2 | 2017-08-05 12:23:30 -0400 | [diff] [blame] | 992 | gst_v4l2_buffer_pool_flush (self->v4l2output->pool); |
| 993 | gst_v4l2_buffer_pool_flush (self->v4l2capture->pool); |
Nicolas Dufresne | a4b5811 | 2014-05-14 17:18:35 -0400 | [diff] [blame] | 994 | break; |
| 995 | default: |
| 996 | break; |
| 997 | } |
| 998 | |
| 999 | return ret; |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 1000 | } |
| 1001 | |
| 1002 | static GstStateChangeReturn |
| 1003 | gst_v4l2_transform_change_state (GstElement * element, |
| 1004 | GstStateChange transition) |
| 1005 | { |
| 1006 | GstV4l2Transform *self = GST_V4L2_TRANSFORM (element); |
Nicolas Dufresne | 783417e | 2014-04-15 17:31:42 -0400 | [diff] [blame] | 1007 | GstStateChangeReturn ret; |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 1008 | |
Nicolas Dufresne | 783417e | 2014-04-15 17:31:42 -0400 | [diff] [blame] | 1009 | switch (transition) { |
| 1010 | case GST_STATE_CHANGE_NULL_TO_READY: |
| 1011 | if (!gst_v4l2_transform_open (self)) |
| 1012 | return GST_STATE_CHANGE_FAILURE; |
| 1013 | break; |
| 1014 | case GST_STATE_CHANGE_PAUSED_TO_READY: |
| 1015 | gst_v4l2_object_unlock (self->v4l2output); |
| 1016 | gst_v4l2_object_unlock (self->v4l2capture); |
| 1017 | break; |
| 1018 | default: |
| 1019 | break; |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 1020 | } |
| 1021 | |
Nicolas Dufresne | 783417e | 2014-04-15 17:31:42 -0400 | [diff] [blame] | 1022 | ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); |
| 1023 | |
| 1024 | switch (transition) { |
| 1025 | case GST_STATE_CHANGE_READY_TO_NULL: |
| 1026 | gst_v4l2_transform_close (self); |
| 1027 | break; |
| 1028 | default: |
| 1029 | break; |
| 1030 | } |
| 1031 | |
| 1032 | return ret; |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 1033 | } |
| 1034 | |
| 1035 | static void |
| 1036 | gst_v4l2_transform_dispose (GObject * object) |
| 1037 | { |
| 1038 | GstV4l2Transform *self = GST_V4L2_TRANSFORM (object); |
| 1039 | |
| 1040 | gst_caps_replace (&self->probed_sinkcaps, NULL); |
| 1041 | gst_caps_replace (&self->probed_srccaps, NULL); |
| 1042 | |
| 1043 | G_OBJECT_CLASS (parent_class)->dispose (object); |
| 1044 | } |
| 1045 | |
| 1046 | static void |
| 1047 | gst_v4l2_transform_finalize (GObject * object) |
| 1048 | { |
| 1049 | GstV4l2Transform *self = GST_V4L2_TRANSFORM (object); |
| 1050 | |
| 1051 | gst_v4l2_object_destroy (self->v4l2capture); |
| 1052 | gst_v4l2_object_destroy (self->v4l2output); |
| 1053 | |
| 1054 | G_OBJECT_CLASS (parent_class)->finalize (object); |
| 1055 | } |
| 1056 | |
| 1057 | static void |
| 1058 | gst_v4l2_transform_init (GstV4l2Transform * self) |
| 1059 | { |
| 1060 | /* V4L2 object are created in subinstance_init */ |
Nicolas Dufresne | 3500e44 | 2014-04-18 17:51:07 -0400 | [diff] [blame] | 1061 | /* enable QoS */ |
| 1062 | gst_base_transform_set_qos_enabled (GST_BASE_TRANSFORM (self), TRUE); |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 1063 | } |
| 1064 | |
| 1065 | static void |
Nicolas Dufresne | 7a4b076 | 2014-03-16 11:36:19 +0100 | [diff] [blame] | 1066 | gst_v4l2_transform_subinstance_init (GTypeInstance * instance, gpointer g_class) |
| 1067 | { |
| 1068 | GstV4l2TransformClass *klass = GST_V4L2_TRANSFORM_CLASS (g_class); |
| 1069 | GstV4l2Transform *self = GST_V4L2_TRANSFORM (instance); |
| 1070 | |
| 1071 | self->v4l2output = gst_v4l2_object_new (GST_ELEMENT (self), |
Nicolas Dufresne | e575e4e | 2017-12-13 14:39:47 -0500 | [diff] [blame] | 1072 | GST_OBJECT (GST_BASE_TRANSFORM_SINK_PAD (self)), |
Nicolas Dufresne | 7a4b076 | 2014-03-16 11:36:19 +0100 | [diff] [blame] | 1073 | V4L2_BUF_TYPE_VIDEO_OUTPUT, klass->default_device, |
| 1074 | gst_v4l2_get_output, gst_v4l2_set_output, NULL); |
| 1075 | self->v4l2output->no_initial_format = TRUE; |
| 1076 | self->v4l2output->keep_aspect = FALSE; |
| 1077 | |
| 1078 | self->v4l2capture = gst_v4l2_object_new (GST_ELEMENT (self), |
Nicolas Dufresne | e575e4e | 2017-12-13 14:39:47 -0500 | [diff] [blame] | 1079 | GST_OBJECT (GST_BASE_TRANSFORM_SRC_PAD (self)), |
Nicolas Dufresne | 7a4b076 | 2014-03-16 11:36:19 +0100 | [diff] [blame] | 1080 | V4L2_BUF_TYPE_VIDEO_CAPTURE, klass->default_device, |
| 1081 | gst_v4l2_get_input, gst_v4l2_set_input, NULL); |
| 1082 | self->v4l2capture->no_initial_format = TRUE; |
| 1083 | self->v4l2output->keep_aspect = FALSE; |
Nicolas Dufresne | 7a4b076 | 2014-03-16 11:36:19 +0100 | [diff] [blame] | 1084 | } |
| 1085 | |
| 1086 | static void |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 1087 | gst_v4l2_transform_class_init (GstV4l2TransformClass * klass) |
| 1088 | { |
| 1089 | GstElementClass *element_class; |
| 1090 | GObjectClass *gobject_class; |
| 1091 | GstBaseTransformClass *base_transform_class; |
| 1092 | |
| 1093 | element_class = (GstElementClass *) klass; |
| 1094 | gobject_class = (GObjectClass *) klass; |
| 1095 | base_transform_class = (GstBaseTransformClass *) klass; |
| 1096 | |
Nicolas Dufresne | 01feadc | 2014-05-04 19:13:37 -0400 | [diff] [blame] | 1097 | GST_DEBUG_CATEGORY_INIT (gst_v4l2_transform_debug, "v4l2transform", 0, |
| 1098 | "V4L2 Converter"); |
| 1099 | |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 1100 | gst_element_class_set_static_metadata (element_class, |
| 1101 | "V4L2 Video Converter", |
Enrico Jorns | 3067a60 | 2015-01-09 11:36:11 +0100 | [diff] [blame] | 1102 | "Filter/Converter/Video/Scaler", |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 1103 | "Transform streams via V4L2 API", |
| 1104 | "Nicolas Dufresne <nicolas.dufresne@collabora.com>"); |
| 1105 | |
| 1106 | gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_v4l2_transform_dispose); |
| 1107 | gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_v4l2_transform_finalize); |
| 1108 | gobject_class->set_property = |
| 1109 | GST_DEBUG_FUNCPTR (gst_v4l2_transform_set_property); |
| 1110 | gobject_class->get_property = |
| 1111 | GST_DEBUG_FUNCPTR (gst_v4l2_transform_get_property); |
| 1112 | |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 1113 | base_transform_class->stop = GST_DEBUG_FUNCPTR (gst_v4l2_transform_stop); |
| 1114 | base_transform_class->set_caps = |
| 1115 | GST_DEBUG_FUNCPTR (gst_v4l2_transform_set_caps); |
| 1116 | base_transform_class->query = GST_DEBUG_FUNCPTR (gst_v4l2_transform_query); |
| 1117 | base_transform_class->sink_event = |
| 1118 | GST_DEBUG_FUNCPTR (gst_v4l2_transform_sink_event); |
| 1119 | base_transform_class->decide_allocation = |
| 1120 | GST_DEBUG_FUNCPTR (gst_v4l2_transform_decide_allocation); |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 1121 | base_transform_class->propose_allocation = |
| 1122 | GST_DEBUG_FUNCPTR (gst_v4l2_transform_propose_allocation); |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 1123 | base_transform_class->transform_caps = |
| 1124 | GST_DEBUG_FUNCPTR (gst_v4l2_transform_transform_caps); |
| 1125 | base_transform_class->fixate_caps = |
| 1126 | GST_DEBUG_FUNCPTR (gst_v4l2_transform_fixate_caps); |
| 1127 | base_transform_class->prepare_output_buffer = |
| 1128 | GST_DEBUG_FUNCPTR (gst_v4l2_transform_prepare_output_buffer); |
| 1129 | base_transform_class->transform = |
| 1130 | GST_DEBUG_FUNCPTR (gst_v4l2_transform_transform); |
| 1131 | |
| 1132 | base_transform_class->passthrough_on_same_caps = TRUE; |
| 1133 | |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 1134 | element_class->change_state = |
| 1135 | GST_DEBUG_FUNCPTR (gst_v4l2_transform_change_state); |
| 1136 | |
Nicolas Dufresne | 077fcbc | 2014-05-15 18:08:53 -0400 | [diff] [blame] | 1137 | gst_v4l2_object_install_m2m_properties_helper (gobject_class); |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 1138 | } |
| 1139 | |
| 1140 | static void |
| 1141 | gst_v4l2_transform_subclass_init (gpointer g_class, gpointer data) |
| 1142 | { |
| 1143 | GstV4l2TransformClass *klass = GST_V4L2_TRANSFORM_CLASS (g_class); |
| 1144 | GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); |
| 1145 | GstV4l2TransformCData *cdata = data; |
| 1146 | |
| 1147 | klass->default_device = cdata->device; |
| 1148 | |
| 1149 | /* Note: gst_pad_template_new() take the floating ref from the caps */ |
| 1150 | gst_element_class_add_pad_template (element_class, |
| 1151 | gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, |
| 1152 | cdata->sink_caps)); |
| 1153 | gst_element_class_add_pad_template (element_class, |
| 1154 | gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS, |
| 1155 | cdata->src_caps)); |
| 1156 | |
| 1157 | g_free (cdata); |
| 1158 | } |
| 1159 | |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 1160 | /* Probing functions */ |
| 1161 | gboolean |
| 1162 | gst_v4l2_is_transform (GstCaps * sink_caps, GstCaps * src_caps) |
| 1163 | { |
| 1164 | gboolean ret = FALSE; |
| 1165 | |
| 1166 | if (gst_caps_is_subset (sink_caps, gst_v4l2_object_get_raw_caps ()) |
| 1167 | && gst_caps_is_subset (src_caps, gst_v4l2_object_get_raw_caps ())) |
| 1168 | ret = TRUE; |
| 1169 | |
| 1170 | return ret; |
| 1171 | } |
| 1172 | |
Nicolas Dufresne | 1762c2e | 2017-07-27 10:51:07 -0400 | [diff] [blame] | 1173 | void |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 1174 | gst_v4l2_transform_register (GstPlugin * plugin, const gchar * basename, |
| 1175 | const gchar * device_path, GstCaps * sink_caps, GstCaps * src_caps) |
| 1176 | { |
| 1177 | GTypeQuery type_query; |
| 1178 | GTypeInfo type_info = { 0, }; |
| 1179 | GType type, subtype; |
| 1180 | gchar *type_name; |
| 1181 | GstV4l2TransformCData *cdata; |
| 1182 | |
| 1183 | cdata = g_new0 (GstV4l2TransformCData, 1); |
| 1184 | cdata->device = g_strdup (device_path); |
| 1185 | cdata->sink_caps = gst_caps_ref (sink_caps); |
| 1186 | cdata->src_caps = gst_caps_ref (src_caps); |
| 1187 | |
| 1188 | type = gst_v4l2_transform_get_type (); |
| 1189 | g_type_query (type, &type_query); |
| 1190 | memset (&type_info, 0, sizeof (type_info)); |
| 1191 | type_info.class_size = type_query.class_size; |
| 1192 | type_info.instance_size = type_query.instance_size; |
| 1193 | type_info.class_init = gst_v4l2_transform_subclass_init; |
| 1194 | type_info.class_data = cdata; |
| 1195 | type_info.instance_init = gst_v4l2_transform_subinstance_init; |
| 1196 | |
| 1197 | type_name = g_strdup_printf ("v4l2%sconvert", basename); |
| 1198 | subtype = g_type_register_static (type, type_name, &type_info, 0); |
| 1199 | |
Nicolas Dufresne | 1762c2e | 2017-07-27 10:51:07 -0400 | [diff] [blame] | 1200 | if (!gst_element_register (plugin, type_name, GST_RANK_NONE, subtype)) |
| 1201 | GST_WARNING ("Failed to register plugin '%s'", type_name); |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 1202 | |
| 1203 | g_free (type_name); |
Nicolas Dufresne | b781156 | 2014-03-04 18:31:27 -0500 | [diff] [blame] | 1204 | } |