2 * Copyright (C) <2005> Julien Moutte <julien@moutte.net>
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
25 #include "xvimagesink.h"
27 /* Debugging category */
28 #include <gst/gstinfo.h>
30 /* Helper functions */
31 #include <gst/video/video.h>
32 #include <gst/video/gstmetavideo.h>
33 #include <gst/video/gstvideopool.h>
36 GST_DEBUG_CATEGORY_EXTERN (gst_debug_xvimagepool);
37 #define GST_CAT_DEFAULT gst_debug_xvimagepool
40 struct _GstXvImageBufferPoolPrivate
45 GstVideoAlignment align;
48 gboolean add_metavideo;
49 gboolean need_alignment;
52 static void gst_meta_xvimage_free (GstMetaXvImage * meta, GstBuffer * buffer);
54 /* xvimage metadata */
56 gst_meta_xvimage_get_info (void)
58 static const GstMetaInfo *meta_xvimage_info = NULL;
60 if (meta_xvimage_info == NULL) {
61 meta_xvimage_info = gst_meta_register ("GstMetaXvImage", "GstMetaXvImage",
62 sizeof (GstMetaXvImage),
63 (GstMetaInitFunction) NULL,
64 (GstMetaFreeFunction) gst_meta_xvimage_free,
65 (GstMetaCopyFunction) NULL, (GstMetaTransformFunction) NULL);
67 return meta_xvimage_info;
71 static gboolean error_caught = FALSE;
74 gst_xvimagesink_handle_xerror (Display * display, XErrorEvent * xevent)
78 XGetErrorText (display, xevent->error_code, error_msg, 1024);
79 GST_DEBUG ("xvimagesink triggered an XError. error: %s", error_msg);
84 static GstMetaXvImage *
85 gst_buffer_add_meta_xvimage (GstBuffer * buffer, GstXvImageBufferPool * xvpool)
87 GstXvImageSink *xvimagesink;
88 int (*handler) (Display *, XErrorEvent *);
89 gboolean success = FALSE;
90 GstXContext *xcontext;
92 gint width, height, im_format;
93 GstXvImageBufferPoolPrivate *priv;
96 xvimagesink = xvpool->sink;
97 xcontext = xvimagesink->xcontext;
99 width = priv->padded_width;
100 height = priv->padded_height;
101 im_format = priv->im_format;
104 (GstMetaXvImage *) gst_buffer_add_meta (buffer, GST_META_INFO_XVIMAGE,
107 meta->SHMInfo.shmaddr = ((void *) -1);
108 meta->SHMInfo.shmid = -1;
110 meta->x = priv->align.padding_left;
111 meta->y = priv->align.padding_top;
112 meta->width = priv->info.width;
113 meta->height = priv->info.height;
114 meta->sink = gst_object_ref (xvimagesink);
115 meta->im_format = im_format;
117 GST_DEBUG_OBJECT (xvimagesink, "creating image %p (%dx%d)", buffer,
120 g_mutex_lock (xvimagesink->x_lock);
122 /* Setting an error handler to catch failure */
123 error_caught = FALSE;
124 handler = XSetErrorHandler (gst_xvimagesink_handle_xerror);
127 if (xcontext->use_xshm) {
130 meta->xvimage = XvShmCreateImage (xcontext->disp,
131 xcontext->xv_port_id, im_format, NULL, width, height, &meta->SHMInfo);
132 if (!meta->xvimage || error_caught) {
133 g_mutex_unlock (xvimagesink->x_lock);
135 /* Reset error flag */
136 error_caught = FALSE;
139 GST_ELEMENT_WARNING (xvimagesink, RESOURCE, WRITE,
140 ("Failed to create output image buffer of %dx%d pixels",
142 ("could not XShmCreateImage a %dx%d image", width, height));
144 /* Retry without XShm */
145 xvimagesink->xcontext->use_xshm = FALSE;
147 /* Hold X mutex again to try without XShm */
148 g_mutex_lock (xvimagesink->x_lock);
152 /* we have to use the returned data_size for our shm size */
153 meta->size = meta->xvimage->data_size;
154 GST_LOG_OBJECT (xvimagesink, "XShm image size is %" G_GSIZE_FORMAT,
157 /* calculate the expected size. This is only for sanity checking the
158 * number we get from X. */
160 case GST_MAKE_FOURCC ('I', '4', '2', '0'):
161 case GST_MAKE_FOURCC ('Y', 'V', '1', '2'):
168 pitches[0] = GST_ROUND_UP_4 (width);
169 offsets[1] = offsets[0] + pitches[0] * GST_ROUND_UP_2 (height);
170 pitches[1] = GST_ROUND_UP_8 (width) / 2;
171 offsets[2] = offsets[1] + pitches[1] * GST_ROUND_UP_2 (height) / 2;
172 pitches[2] = GST_ROUND_UP_8 (pitches[0]) / 2;
174 expected_size = offsets[2] + pitches[2] * GST_ROUND_UP_2 (height) / 2;
176 for (plane = 0; plane < meta->xvimage->num_planes; plane++) {
177 GST_DEBUG_OBJECT (xvimagesink,
178 "Plane %u has a expected pitch of %d bytes, " "offset of %d",
179 plane, pitches[plane], offsets[plane]);
183 case GST_MAKE_FOURCC ('Y', 'U', 'Y', '2'):
184 case GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y'):
185 expected_size = height * GST_ROUND_UP_4 (width * 2);
191 if (expected_size != 0 && meta->size != expected_size) {
192 GST_WARNING_OBJECT (xvimagesink,
193 "unexpected XShm image size (got %" G_GSIZE_FORMAT ", expected %d)",
194 meta->size, expected_size);
197 /* Be verbose about our XvImage stride */
201 for (plane = 0; plane < meta->xvimage->num_planes; plane++) {
202 GST_DEBUG_OBJECT (xvimagesink, "Plane %u has a pitch of %d bytes, "
203 "offset of %d", plane, meta->xvimage->pitches[plane],
204 meta->xvimage->offsets[plane]);
208 /* get shared memory */
209 meta->SHMInfo.shmid = shmget (IPC_PRIVATE, meta->size, IPC_CREAT | 0777);
210 if (meta->SHMInfo.shmid == -1)
214 meta->SHMInfo.shmaddr = shmat (meta->SHMInfo.shmid, NULL, 0);
215 if (meta->SHMInfo.shmaddr == ((void *) -1))
218 /* now we can set up the image data */
219 meta->xvimage->data = meta->SHMInfo.shmaddr;
220 meta->SHMInfo.readOnly = FALSE;
222 if (XShmAttach (xcontext->disp, &meta->SHMInfo) == 0)
225 XSync (xcontext->disp, FALSE);
227 /* Delete the shared memory segment as soon as we everyone is attached.
228 * This way, it will be deleted as soon as we detach later, and not
229 * leaked if we crash. */
230 shmctl (meta->SHMInfo.shmid, IPC_RMID, NULL);
232 GST_DEBUG_OBJECT (xvimagesink, "XServer ShmAttached to 0x%x, id 0x%lx",
233 meta->SHMInfo.shmid, meta->SHMInfo.shmseg);
236 #endif /* HAVE_XSHM */
238 meta->xvimage = XvCreateImage (xcontext->disp,
239 xcontext->xv_port_id, im_format, NULL, width, height);
240 if (!meta->xvimage || error_caught)
243 /* we have to use the returned data_size for our image size */
244 meta->size = meta->xvimage->data_size;
245 meta->xvimage->data = g_malloc (meta->size);
247 XSync (xcontext->disp, FALSE);
250 /* Reset error handler */
251 error_caught = FALSE;
252 XSetErrorHandler (handler);
254 gst_buffer_take_memory (buffer, -1,
255 gst_memory_new_wrapped (GST_MEMORY_FLAG_NO_SHARE, meta->xvimage->data,
256 NULL, meta->size, 0, meta->size));
258 g_mutex_unlock (xvimagesink->x_lock);
271 g_mutex_unlock (xvimagesink->x_lock);
272 /* Reset error handler */
273 error_caught = FALSE;
274 XSetErrorHandler (handler);
276 GST_ELEMENT_ERROR (xvimagesink, RESOURCE, WRITE,
277 ("Failed to create output image buffer of %dx%d pixels",
279 ("could not XvShmCreateImage a %dx%d image", width, height));
284 g_mutex_unlock (xvimagesink->x_lock);
285 GST_ELEMENT_ERROR (xvimagesink, RESOURCE, WRITE,
286 ("Failed to create output image buffer of %dx%d pixels",
288 ("could not get shared memory of %" G_GSIZE_FORMAT " bytes",
294 g_mutex_unlock (xvimagesink->x_lock);
295 GST_ELEMENT_ERROR (xvimagesink, RESOURCE, WRITE,
296 ("Failed to create output image buffer of %dx%d pixels",
297 width, height), ("Failed to shmat: %s", g_strerror (errno)));
298 /* Clean up the shared memory segment */
299 shmctl (meta->SHMInfo.shmid, IPC_RMID, NULL);
304 /* Clean up the shared memory segment */
305 shmctl (meta->SHMInfo.shmid, IPC_RMID, NULL);
306 g_mutex_unlock (xvimagesink->x_lock);
308 GST_ELEMENT_ERROR (xvimagesink, RESOURCE, WRITE,
309 ("Failed to create output image buffer of %dx%d pixels",
310 width, height), ("Failed to XShmAttach"));
316 gst_meta_xvimage_free (GstMetaXvImage * meta, GstBuffer * buffer)
318 GstXvImageSink *xvimagesink;
320 xvimagesink = meta->sink;
322 GST_DEBUG_OBJECT (xvimagesink, "free meta on buffer %p", buffer);
324 /* Hold the object lock to ensure the XContext doesn't disappear */
325 GST_OBJECT_LOCK (xvimagesink);
326 /* We might have some buffers destroyed after changing state to NULL */
327 if (xvimagesink->xcontext == NULL) {
328 GST_DEBUG_OBJECT (xvimagesink, "Destroying XvImage after Xcontext");
330 /* Need to free the shared memory segment even if the x context
331 * was already cleaned up */
332 if (meta->SHMInfo.shmaddr != ((void *) -1)) {
333 shmdt (meta->SHMInfo.shmaddr);
339 g_mutex_lock (xvimagesink->x_lock);
342 if (xvimagesink->xcontext->use_xshm) {
343 if (meta->SHMInfo.shmaddr != ((void *) -1)) {
344 GST_DEBUG_OBJECT (xvimagesink, "XServer ShmDetaching from 0x%x id 0x%lx",
345 meta->SHMInfo.shmid, meta->SHMInfo.shmseg);
346 XShmDetach (xvimagesink->xcontext->disp, &meta->SHMInfo);
347 XSync (xvimagesink->xcontext->disp, FALSE);
348 shmdt (meta->SHMInfo.shmaddr);
349 meta->SHMInfo.shmaddr = (void *) -1;
352 XFree (meta->xvimage);
354 #endif /* HAVE_XSHM */
357 g_free (meta->xvimage->data);
358 XFree (meta->xvimage);
362 XSync (xvimagesink->xcontext->disp, FALSE);
364 g_mutex_unlock (xvimagesink->x_lock);
367 GST_OBJECT_UNLOCK (xvimagesink);
369 gst_object_unref (meta->sink);
373 /* This function checks that it is actually really possible to create an image
376 gst_xvimagesink_check_xshm_calls (GstXvImageSink * xvimagesink,
377 GstXContext * xcontext)
380 XShmSegmentInfo SHMInfo;
382 int (*handler) (Display *, XErrorEvent *);
383 gboolean result = FALSE;
384 gboolean did_attach = FALSE;
386 g_return_val_if_fail (xcontext != NULL, FALSE);
388 /* Sync to ensure any older errors are already processed */
389 XSync (xcontext->disp, FALSE);
391 /* Set defaults so we don't free these later unnecessarily */
392 SHMInfo.shmaddr = ((void *) -1);
395 /* Setting an error handler to catch failure */
396 error_caught = FALSE;
397 handler = XSetErrorHandler (gst_xvimagesink_handle_xerror);
399 /* Trying to create a 1x1 picture */
400 GST_DEBUG ("XvShmCreateImage of 1x1");
401 xvimage = XvShmCreateImage (xcontext->disp, xcontext->xv_port_id,
402 xcontext->im_format, NULL, 1, 1, &SHMInfo);
404 /* Might cause an error, sync to ensure it is noticed */
405 XSync (xcontext->disp, FALSE);
406 if (!xvimage || error_caught) {
407 GST_WARNING ("could not XvShmCreateImage a 1x1 image");
410 size = xvimage->data_size;
412 SHMInfo.shmid = shmget (IPC_PRIVATE, size, IPC_CREAT | 0777);
413 if (SHMInfo.shmid == -1) {
414 GST_WARNING ("could not get shared memory of %" G_GSIZE_FORMAT " bytes",
419 SHMInfo.shmaddr = shmat (SHMInfo.shmid, NULL, 0);
420 if (SHMInfo.shmaddr == ((void *) -1)) {
421 GST_WARNING ("Failed to shmat: %s", g_strerror (errno));
422 /* Clean up the shared memory segment */
423 shmctl (SHMInfo.shmid, IPC_RMID, NULL);
427 xvimage->data = SHMInfo.shmaddr;
428 SHMInfo.readOnly = FALSE;
430 if (XShmAttach (xcontext->disp, &SHMInfo) == 0) {
431 GST_WARNING ("Failed to XShmAttach");
432 /* Clean up the shared memory segment */
433 shmctl (SHMInfo.shmid, IPC_RMID, NULL);
437 /* Sync to ensure we see any errors we caused */
438 XSync (xcontext->disp, FALSE);
440 /* Delete the shared memory segment as soon as everyone is attached.
441 * This way, it will be deleted as soon as we detach later, and not
442 * leaked if we crash. */
443 shmctl (SHMInfo.shmid, IPC_RMID, NULL);
446 GST_DEBUG ("XServer ShmAttached to 0x%x, id 0x%lx", SHMInfo.shmid,
450 /* store whether we succeeded in result */
453 GST_WARNING ("MIT-SHM extension check failed at XShmAttach. "
454 "Not using shared memory.");
458 /* Sync to ensure we swallow any errors we caused and reset error_caught */
459 XSync (xcontext->disp, FALSE);
461 error_caught = FALSE;
462 XSetErrorHandler (handler);
465 GST_DEBUG ("XServer ShmDetaching from 0x%x id 0x%lx",
466 SHMInfo.shmid, SHMInfo.shmseg);
467 XShmDetach (xcontext->disp, &SHMInfo);
468 XSync (xcontext->disp, FALSE);
470 if (SHMInfo.shmaddr != ((void *) -1))
471 shmdt (SHMInfo.shmaddr);
476 #endif /* HAVE_XSHM */
479 static void gst_xvimage_buffer_pool_finalize (GObject * object);
481 #define GST_XVIMAGE_BUFFER_POOL_GET_PRIVATE(obj) \
482 (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_XVIMAGE_BUFFER_POOL, GstXvImageBufferPoolPrivate))
484 #define gst_xvimage_buffer_pool_parent_class parent_class
485 G_DEFINE_TYPE (GstXvImageBufferPool, gst_xvimage_buffer_pool,
486 GST_TYPE_BUFFER_POOL);
488 static const gchar **
489 xvimage_buffer_pool_get_options (GstBufferPool * pool)
491 static const gchar *options[] = { GST_BUFFER_POOL_OPTION_META_VIDEO,
492 GST_BUFFER_POOL_OPTION_VIDEO_ALIGNMENT, NULL
499 xvimage_buffer_pool_set_config (GstBufferPool * pool, GstStructure * config)
501 GstXvImageBufferPool *xvpool = GST_XVIMAGE_BUFFER_POOL_CAST (pool);
502 GstXvImageBufferPoolPrivate *priv = xvpool->priv;
506 if (!gst_buffer_pool_config_get (config, &caps, NULL, NULL, NULL, NULL, NULL))
512 /* now parse the caps from the config */
513 if (!gst_video_info_from_caps (&info, caps))
516 GST_LOG_OBJECT (pool, "%dx%d, caps %" GST_PTR_FORMAT, info.width, info.height,
519 priv->im_format = gst_xvimagesink_get_format_from_info (xvpool->sink, &info);
520 if (priv->im_format == -1)
524 gst_caps_unref (priv->caps);
525 priv->caps = gst_caps_copy (caps);
528 /* enable metadata based on config of the pool */
529 priv->add_metavideo =
530 gst_buffer_pool_config_has_option (config,
531 GST_BUFFER_POOL_OPTION_META_VIDEO);
533 /* parse extra alignment info */
534 priv->need_alignment = gst_buffer_pool_config_has_option (config,
535 GST_BUFFER_POOL_OPTION_VIDEO_ALIGNMENT);
537 if (priv->need_alignment) {
538 gst_buffer_pool_config_get_video_alignment (config, &priv->align);
540 GST_LOG_OBJECT (pool, "padding %u-%ux%u-%u", priv->align.padding_top,
541 priv->align.padding_left, priv->align.padding_left,
542 priv->align.padding_bottom);
544 /* we need the video metadata too now */
545 priv->add_metavideo = TRUE;
548 /* add the padding */
550 GST_VIDEO_INFO_WIDTH (&info) + priv->align.padding_left +
551 priv->align.padding_right;
552 priv->padded_height =
553 GST_VIDEO_INFO_HEIGHT (&info) + priv->align.padding_top +
554 priv->align.padding_bottom;
556 return GST_BUFFER_POOL_CLASS (parent_class)->set_config (pool, config);
561 GST_WARNING_OBJECT (pool, "invalid config");
566 GST_WARNING_OBJECT (pool, "no caps in config");
571 GST_WARNING_OBJECT (pool,
572 "failed getting geometry from caps %" GST_PTR_FORMAT, caps);
577 GST_WARNING_OBJECT (xvpool->sink, "failed to get format from caps %"
578 GST_PTR_FORMAT, caps);
579 GST_ELEMENT_ERROR (xvpool->sink, RESOURCE, WRITE,
580 ("Failed to create output image buffer of %dx%d pixels",
581 priv->info.width, priv->info.height), ("Invalid input caps"));
586 /* This function handles GstXImageBuffer creation depending on XShm availability */
588 xvimage_buffer_pool_alloc (GstBufferPool * pool, GstBuffer ** buffer,
589 GstBufferPoolParams * params)
591 GstXvImageBufferPool *xvpool = GST_XVIMAGE_BUFFER_POOL_CAST (pool);
592 GstXvImageBufferPoolPrivate *priv = xvpool->priv;
595 GstMetaXvImage *meta;
599 xvimage = gst_buffer_new ();
600 meta = gst_buffer_add_meta_xvimage (xvimage, xvpool);
602 gst_buffer_unref (xvimage);
606 if (priv->add_metavideo) {
608 const GstVideoFormatInfo *vinfo = info->finfo;
611 GST_DEBUG_OBJECT (pool, "adding GstMetaVideo");
612 /* these are just the defaults for now */
613 meta = gst_buffer_add_meta_video (xvimage, 0, GST_VIDEO_INFO_FORMAT (info),
614 priv->padded_width, priv->padded_height);
616 if (priv->need_alignment) {
617 meta->width = GST_VIDEO_INFO_WIDTH (&priv->info);
618 meta->height = GST_VIDEO_INFO_HEIGHT (&priv->info);
620 /* FIXME, not quite correct, NV12 would apply the vedge twice on the second
622 for (i = 0; i < GST_VIDEO_INFO_N_COMPONENTS (info); i++) {
623 gint vedge, hedge, plane;
626 GST_VIDEO_FORMAT_INFO_SCALE_WIDTH (vinfo, i,
627 priv->align.padding_left);
629 GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (vinfo, i,
630 priv->align.padding_top);
631 plane = GST_VIDEO_FORMAT_INFO_PLANE (vinfo, i);
633 GST_LOG_OBJECT (pool, "comp %d, plane %d: hedge %d, vedge %d", i,
634 plane, hedge, vedge);
636 meta->offset[plane] += (vedge * meta->stride[plane]) + hedge;
648 GST_WARNING_OBJECT (pool, "can't create image");
649 return GST_FLOW_ERROR;
654 xvimage_buffer_pool_free (GstBufferPool * pool, GstBuffer * buffer)
656 gst_buffer_unref (buffer);
660 gst_xvimage_buffer_pool_new (GstXvImageSink * xvimagesink)
662 GstXvImageBufferPool *pool;
664 g_return_val_if_fail (GST_IS_XVIMAGESINK (xvimagesink), NULL);
666 pool = g_object_new (GST_TYPE_XVIMAGE_BUFFER_POOL, NULL);
667 pool->sink = gst_object_ref (xvimagesink);
669 GST_LOG_OBJECT (pool, "new XvImage buffer pool %p", pool);
671 return GST_BUFFER_POOL_CAST (pool);
675 gst_xvimage_buffer_pool_class_init (GstXvImageBufferPoolClass * klass)
677 GObjectClass *gobject_class = (GObjectClass *) klass;
678 GstBufferPoolClass *gstbufferpool_class = (GstBufferPoolClass *) klass;
680 g_type_class_add_private (klass, sizeof (GstXvImageBufferPoolPrivate));
682 gobject_class->finalize = gst_xvimage_buffer_pool_finalize;
684 gstbufferpool_class->get_options = xvimage_buffer_pool_get_options;
685 gstbufferpool_class->set_config = xvimage_buffer_pool_set_config;
686 gstbufferpool_class->alloc_buffer = xvimage_buffer_pool_alloc;
687 gstbufferpool_class->free_buffer = xvimage_buffer_pool_free;
691 gst_xvimage_buffer_pool_init (GstXvImageBufferPool * pool)
693 pool->priv = GST_XVIMAGE_BUFFER_POOL_GET_PRIVATE (pool);
697 gst_xvimage_buffer_pool_finalize (GObject * object)
699 GstXvImageBufferPool *pool = GST_XVIMAGE_BUFFER_POOL_CAST (object);
700 GstXvImageBufferPoolPrivate *priv = pool->priv;
702 GST_LOG_OBJECT (pool, "finalize XvImage buffer pool %p", pool);
705 gst_caps_unref (priv->caps);
706 gst_object_unref (pool->sink);
708 G_OBJECT_CLASS (gst_xvimage_buffer_pool_parent_class)->finalize (object);
711 /* This function tries to get a format matching with a given caps in the
712 supported list of formats we generated in gst_xvimagesink_get_xv_support */
714 gst_xvimagesink_get_format_from_info (GstXvImageSink * xvimagesink,
719 g_return_val_if_fail (GST_IS_XVIMAGESINK (xvimagesink), 0);
721 list = xvimagesink->xcontext->formats_list;
724 GstXvImageFormat *format = list->data;
726 if (format && format->vformat == GST_VIDEO_INFO_FORMAT (info))
727 return format->format;
729 list = g_list_next (list);