2 * Copyright (C) 2014 Collabora Ltd.
3 * Author: Nicolas Dufresne <nicolas.dufresne@collabora.com>
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.
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.
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.
24 #include "ext/videodev2.h"
25 #include "gstv4l2allocator.h"
26 #include "v4l2_calls.h"
28 #include <gst/allocators/gstdmabuf.h>
33 #include <sys/types.h>
36 #define GST_V4L2_MEMORY_TYPE "V4l2Memory"
38 #define gst_v4l2_allocator_parent_class parent_class
39 G_DEFINE_TYPE (GstV4l2Allocator, gst_v4l2_allocator, GST_TYPE_ALLOCATOR);
41 GST_DEBUG_CATEGORY_STATIC (v4l2allocator_debug);
42 #define GST_CAT_DEFAULT v4l2allocator_debug
44 #define UNSET_QUEUED(buffer) \
45 ((buffer).flags &= ~(V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE))
47 #define SET_QUEUED(buffer) ((buffer).flags |= V4L2_BUF_FLAG_QUEUED)
49 #define IS_QUEUED(buffer) \
50 ((buffer).flags & (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE))
58 static guint gst_v4l2_allocator_signals[LAST_SIGNAL] = { 0 };
60 static void gst_v4l2_allocator_release (GstV4l2Allocator * allocator,
64 memory_type_to_str (guint32 memory)
67 case V4L2_MEMORY_MMAP:
69 case V4L2_MEMORY_USERPTR:
71 case V4L2_MEMORY_DMABUF:
78 /*************************************/
79 /* GstV4lMemory implementation */
80 /*************************************/
83 _v4l2mem_map (GstV4l2Memory * mem, gsize maxsize, GstMapFlags flags)
87 switch (mem->group->buffer.memory) {
88 case V4L2_MEMORY_MMAP:
89 case V4L2_MEMORY_USERPTR:
92 case V4L2_MEMORY_DMABUF:
93 /* v4l2 dmabuf memory are not shared with downstream */
94 g_assert_not_reached ();
97 GST_WARNING ("Unknown memory type %i", mem->group->buffer.memory);
104 _v4l2mem_unmap (GstV4l2Memory * mem)
106 gboolean ret = FALSE;
108 switch (mem->group->buffer.memory) {
109 case V4L2_MEMORY_MMAP:
110 case V4L2_MEMORY_USERPTR:
113 case V4L2_MEMORY_DMABUF:
114 /* v4l2 dmabuf memory are not share with downstream */
115 g_assert_not_reached ();
118 GST_WARNING ("Unknown memory type %i", mem->group->buffer.memory);
125 _v4l2mem_dispose (GstV4l2Memory * mem)
127 GstV4l2Allocator *allocator = (GstV4l2Allocator *) mem->mem.allocator;
128 GstV4l2MemoryGroup *group = mem->group;
131 if (group->mem[mem->plane]) {
132 /* We may have a dmabuf, replace it with returned original memory */
133 group->mem[mem->plane] = gst_memory_ref ((GstMemory *) mem);
134 gst_v4l2_allocator_release (allocator, mem);
137 gst_object_ref (allocator);
145 _v4l2mem_free (GstV4l2Memory * mem)
149 g_slice_free (GstV4l2Memory, mem);
152 static inline GstV4l2Memory *
153 _v4l2mem_new (GstMemoryFlags flags, GstAllocator * allocator,
154 GstMemory * parent, gsize maxsize, gsize align, gsize offset, gsize size,
155 gint plane, gpointer data, int dmafd, GstV4l2MemoryGroup * group)
159 mem = g_slice_new0 (GstV4l2Memory);
160 gst_memory_init (GST_MEMORY_CAST (mem),
161 flags, allocator, parent, maxsize, align, offset, size);
164 mem->mem.mini_object.dispose =
165 (GstMiniObjectDisposeFunction) _v4l2mem_dispose;
175 static GstV4l2Memory *
176 _v4l2mem_share (GstV4l2Memory * mem, gssize offset, gsize size)
181 /* find the real parent */
182 if ((parent = mem->mem.parent) == NULL)
183 parent = (GstMemory *) mem;
186 size = mem->mem.size - offset;
188 /* the shared memory is always readonly */
189 sub = _v4l2mem_new (GST_MINI_OBJECT_FLAGS (parent) |
190 GST_MINI_OBJECT_FLAG_LOCK_READONLY, mem->mem.allocator, parent,
191 mem->mem.maxsize, mem->mem.align, offset, size, mem->plane, mem->data,
198 _v4l2mem_is_span (GstV4l2Memory * mem1, GstV4l2Memory * mem2, gsize * offset)
201 *offset = mem1->mem.offset - mem1->mem.parent->offset;
203 /* and memory is contiguous */
204 return mem1->mem.offset + mem1->mem.size == mem2->mem.offset;
208 _v4l2mem_parent_to_dmabuf (GstV4l2Memory * mem, GstMemory * dma_mem)
210 gst_memory_lock (&mem->mem, GST_LOCK_FLAG_EXCLUSIVE);
211 dma_mem->parent = gst_memory_ref (&mem->mem);
215 gst_is_v4l2_memory (GstMemory * mem)
217 return gst_memory_is_type (mem, GST_V4L2_MEMORY_TYPE);
221 /*************************************/
222 /* GstV4l2MemoryGroup implementation */
223 /*************************************/
226 gst_v4l2_memory_group_free (GstV4l2MemoryGroup * group)
230 for (i = 0; i < group->n_mem; i++) {
231 GstMemory *mem = group->mem[i];
232 group->mem[i] = NULL;
234 gst_memory_unref (mem);
237 g_slice_free (GstV4l2MemoryGroup, group);
240 static GstV4l2MemoryGroup *
241 gst_v4l2_memory_group_new (GstV4l2Allocator * allocator, guint32 index)
243 gint video_fd = allocator->video_fd;
244 guint32 memory = allocator->memory;
245 struct v4l2_format *format = &allocator->format;
246 GstV4l2MemoryGroup *group;
247 gsize img_size, buf_size;
249 group = g_slice_new0 (GstV4l2MemoryGroup);
251 group->buffer.type = format->type;
252 group->buffer.index = index;
253 group->buffer.memory = memory;
255 if (V4L2_TYPE_IS_MULTIPLANAR (format->type)) {
256 group->n_mem = group->buffer.length = format->fmt.pix_mp.num_planes;
257 group->buffer.m.planes = group->planes;
262 if (v4l2_ioctl (video_fd, VIDIOC_QUERYBUF, &group->buffer) < 0)
263 goto querybuf_failed;
265 /* Check that provided size matches the format we have negotiation. Failing
266 * there usually means a driver of libv4l bug. */
267 if (V4L2_TYPE_IS_MULTIPLANAR (allocator->type)) {
270 for (i = 0; i < group->n_mem; i++) {
271 img_size = allocator->format.fmt.pix_mp.plane_fmt[i].sizeimage;
272 buf_size = group->planes[i].length;
273 if (buf_size < img_size)
274 goto buffer_too_short;
277 img_size = allocator->format.fmt.pix.sizeimage;
278 buf_size = group->buffer.length;
279 if (buf_size < img_size)
280 goto buffer_too_short;
283 /* We save non planar buffer information into the multi-planar plane array
284 * to avoid duplicating the code later */
285 if (!V4L2_TYPE_IS_MULTIPLANAR (format->type)) {
286 group->planes[0].bytesused = group->buffer.bytesused;
287 group->planes[0].length = group->buffer.length;
288 g_assert (sizeof (group->planes[0].m) == sizeof (group->buffer.m));
289 memcpy (&group->planes[0].m, &group->buffer.m, sizeof (group->buffer.m));
292 GST_LOG_OBJECT (allocator, "Got %s buffer", memory_type_to_str (memory));
293 GST_LOG_OBJECT (allocator, " index: %u", group->buffer.index);
294 GST_LOG_OBJECT (allocator, " type: %d", group->buffer.type);
295 GST_LOG_OBJECT (allocator, " flags: %08x", group->buffer.flags);
296 GST_LOG_OBJECT (allocator, " field: %d", group->buffer.field);
297 GST_LOG_OBJECT (allocator, " memory: %d", group->buffer.memory);
298 GST_LOG_OBJECT (allocator, " planes: %d", group->n_mem);
300 #ifndef GST_DISABLE_GST_DEBUG
301 if (memory == V4L2_MEMORY_MMAP) {
303 for (i = 0; i < group->n_mem; i++) {
304 GST_LOG_OBJECT (allocator, " [%u] bytesused: %u, length: %u", i,
305 group->planes[i].bytesused, group->planes[i].length);
306 GST_LOG_OBJECT (allocator, " [%u] MMAP offset: %u", i,
307 group->planes[i].m.mem_offset);
316 GST_ERROR ("error querying buffer %d: %s", index, g_strerror (errno));
321 GST_ERROR ("buffer size %" G_GSIZE_FORMAT
322 " is smaller then negotiated size %" G_GSIZE_FORMAT
323 ", this is usually the result of a bug in the v4l2 driver or libv4l.",
328 gst_v4l2_memory_group_free (group);
333 /*************************************/
334 /* GstV4lAllocator implementation */
335 /*************************************/
338 gst_v4l2_allocator_release (GstV4l2Allocator * allocator, GstV4l2Memory * mem)
340 GstV4l2MemoryGroup *group = mem->group;
342 GST_LOG_OBJECT (allocator, "plane %i of buffer %u released",
343 mem->plane, group->buffer.index);
345 switch (allocator->memory) {
346 case V4L2_MEMORY_DMABUF:
350 case V4L2_MEMORY_USERPTR:
357 /* When all memory are back, put the group back in the free queue */
358 if (g_atomic_int_dec_and_test (&group->mems_allocated)) {
359 GST_LOG_OBJECT (allocator, "buffer %u released", group->buffer.index);
360 gst_atomic_queue_push (allocator->free_queue, group);
361 g_signal_emit (allocator, gst_v4l2_allocator_signals[GROUP_RELEASED], 0);
364 /* Keep last, allocator may be freed after this call */
365 g_object_unref (allocator);
369 gst_v4l2_allocator_free (GstAllocator * gallocator, GstMemory * gmem)
371 GstV4l2Allocator *allocator = (GstV4l2Allocator *) gallocator;
372 GstV4l2Memory *mem = (GstV4l2Memory *) gmem;
373 GstV4l2MemoryGroup *group = mem->group;
375 GST_LOG_OBJECT (allocator, "freeing plane %i of buffer %u",
376 mem->plane, group->buffer.index);
378 switch (allocator->memory) {
379 case V4L2_MEMORY_MMAP:
381 v4l2_munmap (mem->data, group->planes[mem->plane].length);
382 } else if (group->planes[mem->plane].m.fd > 0) {
383 close (group->planes[mem->plane].m.fd);
395 gst_v4l2_allocator_dispose (GObject * obj)
397 GstV4l2Allocator *allocator = (GstV4l2Allocator *) obj;
400 GST_LOG_OBJECT (obj, "called");
402 for (i = 0; i < allocator->count; i++) {
403 GstV4l2MemoryGroup *group = allocator->groups[i];
404 allocator->groups[i] = NULL;
406 gst_v4l2_memory_group_free (group);
409 G_OBJECT_CLASS (parent_class)->dispose (obj);
413 gst_v4l2_allocator_finalize (GObject * obj)
415 GstV4l2Allocator *allocator = (GstV4l2Allocator *) obj;
417 GST_LOG_OBJECT (obj, "called");
419 v4l2_close (allocator->video_fd);
420 gst_atomic_queue_unref (allocator->free_queue);
422 G_OBJECT_CLASS (parent_class)->finalize (obj);
426 gst_v4l2_allocator_class_init (GstV4l2AllocatorClass * klass)
428 GObjectClass *object_class;
429 GstAllocatorClass *allocator_class;
431 allocator_class = (GstAllocatorClass *) klass;
432 object_class = (GObjectClass *) klass;
434 allocator_class->alloc = NULL;
435 allocator_class->free = gst_v4l2_allocator_free;
437 object_class->dispose = gst_v4l2_allocator_dispose;
438 object_class->finalize = gst_v4l2_allocator_finalize;
440 gst_v4l2_allocator_signals[GROUP_RELEASED] = g_signal_new ("group-released",
441 G_TYPE_FROM_CLASS (object_class), G_SIGNAL_RUN_LAST, 0, NULL, NULL, NULL,
444 GST_DEBUG_CATEGORY_INIT (v4l2allocator_debug, "v4l2allocator", 0,
449 gst_v4l2_allocator_init (GstV4l2Allocator * allocator)
451 GstAllocator *alloc = GST_ALLOCATOR_CAST (allocator);
453 alloc->mem_type = GST_V4L2_MEMORY_TYPE;
454 alloc->mem_map = (GstMemoryMapFunction) _v4l2mem_map;
455 alloc->mem_unmap = (GstMemoryUnmapFunction) _v4l2mem_unmap;
456 alloc->mem_share = (GstMemoryShareFunction) _v4l2mem_share;
457 alloc->mem_is_span = (GstMemoryIsSpanFunction) _v4l2mem_is_span;
458 /* Use the default, fallback copy function */
460 allocator->free_queue = gst_atomic_queue_new (VIDEO_MAX_FRAME);
462 GST_OBJECT_FLAG_SET (allocator, GST_ALLOCATOR_FLAG_CUSTOM_ALLOC);
465 #define GST_V4L2_ALLOCATOR_PROBE(obj,type) \
466 gst_v4l2_allocator_probe ((obj), V4L2_MEMORY_ ## type, \
467 GST_V4L2_ALLOCATOR_FLAG_ ## type ## _REQBUFS, \
468 GST_V4L2_ALLOCATOR_FLAG_ ## type ## _CREATE_BUFS)
470 gst_v4l2_allocator_probe (GstV4l2Allocator * allocator, guint32 memory,
471 guint32 breq_flag, guint32 bcreate_flag)
473 struct v4l2_requestbuffers breq = { 0 };
476 breq.type = allocator->type;
478 breq.memory = memory;
480 if (v4l2_ioctl (allocator->video_fd, VIDIOC_REQBUFS, &breq) == 0) {
481 struct v4l2_create_buffers bcreate = { 0 };
485 bcreate.memory = V4L2_MEMORY_MMAP;
486 bcreate.format = allocator->format;
488 if ((v4l2_ioctl (allocator->video_fd, VIDIOC_CREATE_BUFS, &bcreate) == 0))
489 flags |= bcreate_flag;
495 static GstV4l2MemoryGroup *
496 gst_v4l2_allocator_create_buf (GstV4l2Allocator * allocator)
498 struct v4l2_create_buffers bcreate = { 0 };
499 GstV4l2MemoryGroup *group = NULL;
501 GST_OBJECT_LOCK (allocator);
503 if (!allocator->active)
506 bcreate.memory = allocator->memory;
507 bcreate.format = allocator->format;
510 if (!allocator->can_allocate)
513 if (v4l2_ioctl (allocator->video_fd, VIDIOC_CREATE_BUFS, &bcreate) < 0)
514 goto create_bufs_failed;
516 group = gst_v4l2_memory_group_new (allocator, bcreate.index);
519 allocator->groups[bcreate.index] = group;
524 GST_OBJECT_UNLOCK (allocator);
529 GST_WARNING_OBJECT (allocator, "error creating a new buffer: %s",
535 static GstV4l2MemoryGroup *
536 gst_v4l2_allocator_alloc (GstV4l2Allocator * allocator)
538 GstV4l2MemoryGroup *group;
540 if (!g_atomic_int_get (&allocator->active))
543 group = gst_atomic_queue_pop (allocator->free_queue);
546 if (allocator->can_allocate) {
547 group = gst_v4l2_allocator_create_buf (allocator);
549 /* Don't hammer on CREATE_BUFS */
551 allocator->can_allocate = FALSE;
559 gst_v4l2_allocator_reset_size (GstV4l2Allocator * allocator,
560 GstV4l2MemoryGroup * group)
564 if (V4L2_TYPE_IS_MULTIPLANAR (allocator->type)) {
567 for (i = 0; i < group->n_mem; i++) {
568 size = allocator->format.fmt.pix_mp.plane_fmt[i].sizeimage;
569 gst_memory_resize (group->mem[i], 0, size);
573 size = allocator->format.fmt.pix.sizeimage;
574 gst_memory_resize (group->mem[0], 0, size);
579 _cleanup_failed_alloc (GstV4l2Allocator * allocator, GstV4l2MemoryGroup * group)
581 if (group->mems_allocated > 0) {
583 /* If one or more mmap worked, we need to unref the memory, otherwise
584 * they will keep a ref on the allocator and leak it. This will put back
585 * the group into the free_queue */
586 for (i = 0; i < group->n_mem; i++)
587 gst_memory_unref (group->mem[i]);
589 /* Otherwise, group has to be on free queue for _stop() to work */
590 gst_atomic_queue_push (allocator->free_queue, group);
597 gst_v4l2_allocator_new (GstObject * parent, gint video_fd,
598 struct v4l2_format *format)
600 GstV4l2Allocator *allocator;
602 gchar *name, *parent_name;
604 parent_name = gst_object_get_name (parent);
605 name = g_strconcat (parent_name, ":allocator", NULL);
606 g_free (parent_name);
608 allocator = g_object_new (GST_TYPE_V4L2_ALLOCATOR, "name", name, NULL);
611 /* Save everything */
612 allocator->video_fd = v4l2_dup (video_fd);
613 allocator->type = format->type;
614 allocator->format = *format;
616 flags |= GST_V4L2_ALLOCATOR_PROBE (allocator, MMAP);
617 flags |= GST_V4L2_ALLOCATOR_PROBE (allocator, USERPTR);
618 flags |= GST_V4L2_ALLOCATOR_PROBE (allocator, DMABUF);
620 GST_OBJECT_FLAG_SET (allocator, flags);
629 GST_ERROR_OBJECT (allocator,
630 "No memory model supported by GStreamer for this device");
631 g_object_unref (allocator);
637 gst_v4l2_allocator_start (GstV4l2Allocator * allocator, guint32 count,
640 struct v4l2_requestbuffers breq = { count, allocator->type, memory };
641 gboolean can_allocate;
644 g_return_val_if_fail (count != 0, 0);
646 GST_OBJECT_LOCK (allocator);
648 if (allocator->active)
651 if (v4l2_ioctl (allocator->video_fd, VIDIOC_REQBUFS, &breq) < 0)
658 case V4L2_MEMORY_MMAP:
659 can_allocate = GST_V4L2_ALLOCATOR_CAN_ALLOCATE (allocator, MMAP);
661 case V4L2_MEMORY_USERPTR:
662 can_allocate = GST_V4L2_ALLOCATOR_CAN_ALLOCATE (allocator, USERPTR);
664 case V4L2_MEMORY_DMABUF:
665 can_allocate = GST_V4L2_ALLOCATOR_CAN_ALLOCATE (allocator, DMABUF);
668 can_allocate = FALSE;
672 GST_DEBUG_OBJECT (allocator, "allocated %u %s buffers out of %u requested",
673 breq.count, memory_type_to_str (memory), count);
675 allocator->can_allocate = can_allocate;
676 allocator->count = breq.count;
677 allocator->memory = memory;
679 /* Create memory groups */
680 for (i = 0; i < allocator->count; i++) {
681 allocator->groups[i] = gst_v4l2_memory_group_new (allocator, i);
682 if (allocator->groups[i] == NULL)
685 gst_atomic_queue_push (allocator->free_queue, allocator->groups[i]);
688 g_atomic_int_set (&allocator->active, TRUE);
691 GST_OBJECT_UNLOCK (allocator);
696 GST_ERROR_OBJECT (allocator,
697 "error requesting %d buffers: %s", count, g_strerror (errno));
702 GST_ERROR_OBJECT (allocator,
703 "error requesting %d buffers: %s", count, g_strerror (errno));
708 GST_ERROR_OBJECT (allocator, "Not enough memory to allocate buffers");
719 gst_v4l2_allocator_stop (GstV4l2Allocator * allocator)
721 struct v4l2_requestbuffers breq = { 0, allocator->type, allocator->memory };
723 GstV4l2Return ret = GST_V4L2_OK;
725 GST_DEBUG_OBJECT (allocator, "stop allocator");
727 GST_OBJECT_LOCK (allocator);
729 if (!allocator->active)
732 if (gst_atomic_queue_length (allocator->free_queue) != allocator->count) {
733 GST_DEBUG_OBJECT (allocator, "allocator is still in use");
738 while (gst_atomic_queue_pop (allocator->free_queue)) {
742 for (i = 0; i < allocator->count; i++) {
743 GstV4l2MemoryGroup *group = allocator->groups[i];
744 allocator->groups[i] = NULL;
746 gst_v4l2_memory_group_free (group);
749 if (v4l2_ioctl (allocator->video_fd, VIDIOC_REQBUFS, &breq) < 0)
752 g_atomic_int_set (&allocator->active, FALSE);
755 GST_OBJECT_UNLOCK (allocator);
760 GST_ERROR_OBJECT (allocator,
761 "error releasing buffers buffers: %s", g_strerror (errno));
762 ret = GST_V4L2_ERROR;
768 gst_v4l2_allocator_alloc_mmap (GstV4l2Allocator * allocator)
770 GstV4l2MemoryGroup *group;
773 g_return_val_if_fail (allocator->memory == V4L2_MEMORY_MMAP, NULL);
775 group = gst_v4l2_allocator_alloc (allocator);
780 for (i = 0; i < group->n_mem; i++) {
781 if (group->mem[i] == NULL) {
783 data = v4l2_mmap (NULL, group->planes[i].length, PROT_READ | PROT_WRITE,
784 MAP_SHARED, allocator->video_fd, group->planes[i].m.mem_offset);
786 if (data == MAP_FAILED)
789 GST_LOG_OBJECT (allocator,
790 "mmap buffer length %d, data offset %d, plane %d",
791 group->planes[i].length, group->planes[i].data_offset, i);
793 group->mem[i] = (GstMemory *) _v4l2mem_new (0, GST_ALLOCATOR (allocator),
794 NULL, group->planes[i].length, 0, 0, group->planes[i].length, i,
797 /* Take back the allocator reference */
798 gst_object_ref (allocator);
801 group->mems_allocated++;
804 /* Ensure group size. Unlike GST, v4l2 have size (bytesused) initially set
805 * to 0. As length might be bigger then the expected size exposed in the
806 * format, we simply set bytesused initially and reset it here for
808 gst_v4l2_allocator_reset_size (allocator, group);
814 GST_ERROR_OBJECT (allocator, "Failed to mmap buffer: %s",
816 _cleanup_failed_alloc (allocator, group);
822 gst_v4l2_allocator_alloc_dmabuf (GstV4l2Allocator * allocator,
823 GstAllocator * dmabuf_allocator)
825 GstV4l2MemoryGroup *group;
828 g_return_val_if_fail (allocator->memory == V4L2_MEMORY_MMAP, NULL);
830 group = gst_v4l2_allocator_alloc (allocator);
835 for (i = 0; i < group->n_mem; i++) {
840 if (group->mem[i] == NULL) {
841 struct v4l2_exportbuffer expbuf = { 0 };
843 expbuf.type = allocator->type;
844 expbuf.index = group->buffer.index;
846 expbuf.flags = O_CLOEXEC | O_RDWR;
848 if (v4l2_ioctl (allocator->video_fd, VIDIOC_EXPBUF, &expbuf) < 0)
851 GST_LOG_OBJECT (allocator, "exported DMABUF as fd %i plane %d",
854 group->mem[i] = (GstMemory *) _v4l2mem_new (0, GST_ALLOCATOR (allocator),
855 NULL, group->planes[i].length, 0, 0, group->planes[i].length, i,
856 NULL, expbuf.fd, group);
858 /* Take back the allocator reference */
859 gst_object_ref (allocator);
862 g_assert (gst_is_v4l2_memory (group->mem[i]));
863 mem = (GstV4l2Memory *) group->mem[i];
865 if ((dmafd = dup (mem->dmafd)) < 0)
868 dma_mem = gst_dmabuf_allocator_alloc (dmabuf_allocator, dmafd,
870 _v4l2mem_parent_to_dmabuf (mem, dma_mem);
872 group->mem[i] = dma_mem;
873 group->mems_allocated++;
876 gst_v4l2_allocator_reset_size (allocator, group);
882 GST_ERROR_OBJECT (allocator, "Failed to export DMABUF: %s",
888 GST_ERROR_OBJECT (allocator, "Failed to dup DMABUF descriptor: %s",
894 _cleanup_failed_alloc (allocator, group);
900 gst_v4l2_allocator_clear_dmabufin (GstV4l2Allocator * allocator,
901 GstV4l2MemoryGroup * group)
906 g_return_if_fail (allocator->memory == V4L2_MEMORY_DMABUF);
908 for (i = 0; i < group->n_mem; i++) {
910 mem = (GstV4l2Memory *) group->mem[i];
912 GST_LOG_OBJECT (allocator, "clearing DMABUF import, fd %i plane %d",
919 mem->mem.maxsize = 0;
924 /* Update v4l2 structure */
925 group->planes[i].length = 0;
926 group->planes[i].bytesused = 0;
927 group->planes[i].m.fd = -1;
928 group->planes[i].data_offset = 0;
931 if (!V4L2_TYPE_IS_MULTIPLANAR (allocator->type)) {
932 group->buffer.bytesused = 0;
933 group->buffer.length = 0;
934 group->buffer.m.fd = -1;
939 gst_v4l2_allocator_alloc_dmabufin (GstV4l2Allocator * allocator)
941 GstV4l2MemoryGroup *group;
944 g_return_val_if_fail (allocator->memory == V4L2_MEMORY_DMABUF, NULL);
946 group = gst_v4l2_allocator_alloc (allocator);
951 for (i = 0; i < group->n_mem; i++) {
952 GST_LOG_OBJECT (allocator, "allocation empty DMABUF import group");
954 if (group->mem[i] == NULL) {
955 group->mem[i] = (GstMemory *) _v4l2mem_new (0, GST_ALLOCATOR (allocator),
956 NULL, 0, 0, 0, 0, i, NULL, -1, group);
958 /* Take back the allocator reference */
959 gst_object_ref (allocator);
962 group->mems_allocated++;
965 gst_v4l2_allocator_clear_dmabufin (allocator, group);
971 gst_v4l2_allocator_clear_userptr (GstV4l2Allocator * allocator,
972 GstV4l2MemoryGroup * group)
977 g_return_if_fail (allocator->memory == V4L2_MEMORY_USERPTR);
979 for (i = 0; i < group->n_mem; i++) {
980 mem = (GstV4l2Memory *) group->mem[i];
982 GST_LOG_OBJECT (allocator, "clearing USERPTR %p plane %d size %"
983 G_GSIZE_FORMAT, mem->data, i, mem->mem.size);
985 mem->mem.maxsize = 0;
989 group->planes[i].length = 0;
990 group->planes[i].bytesused = 0;
991 group->planes[i].m.userptr = 0;
994 if (!V4L2_TYPE_IS_MULTIPLANAR (allocator->type)) {
995 group->buffer.bytesused = 0;
996 group->buffer.length = 0;
997 group->buffer.m.userptr = 0;
1001 GstV4l2MemoryGroup *
1002 gst_v4l2_allocator_alloc_userptr (GstV4l2Allocator * allocator)
1004 GstV4l2MemoryGroup *group;
1007 g_return_val_if_fail (allocator->memory == V4L2_MEMORY_USERPTR, NULL);
1009 group = gst_v4l2_allocator_alloc (allocator);
1014 for (i = 0; i < group->n_mem; i++) {
1016 GST_LOG_OBJECT (allocator, "allocating empty USERPTR group");
1018 if (group->mem[i] == NULL) {
1019 group->mem[i] = (GstMemory *) _v4l2mem_new (0, GST_ALLOCATOR (allocator),
1020 NULL, 0, 0, 0, 0, i, NULL, -1, group);
1022 /* Take back the allocator reference */
1023 gst_object_ref (allocator);
1026 group->mems_allocated++;
1029 gst_v4l2_allocator_clear_userptr (allocator, group);
1035 gst_v4l2_allocator_import_dmabuf (GstV4l2Allocator * allocator,
1036 GstV4l2MemoryGroup * group, gint n_mem, GstMemory ** dma_mem)
1041 g_return_val_if_fail (allocator->memory == V4L2_MEMORY_DMABUF, FALSE);
1043 if (group->n_mem != n_mem)
1044 goto n_mem_missmatch;
1046 for (i = 0; i < group->n_mem; i++) {
1048 gsize size, offset, maxsize;
1050 if (!gst_is_dmabuf_memory (dma_mem[i]))
1053 size = gst_memory_get_sizes (dma_mem[i], &offset, &maxsize);
1055 if ((dmafd = dup (gst_dmabuf_memory_get_fd (dma_mem[i]))) < 0)
1058 GST_LOG_OBJECT (allocator, "imported DMABUF as fd %i plane %d", dmafd, i);
1060 mem = (GstV4l2Memory *) group->mem[i];
1063 mem->mem.maxsize = maxsize;
1064 mem->mem.offset = offset;
1065 mem->mem.size = size;
1068 /* Update v4l2 structure */
1069 group->planes[i].length = maxsize;
1070 group->planes[i].bytesused = size;
1071 group->planes[i].m.fd = dmafd;
1072 group->planes[i].data_offset = offset;
1075 /* Copy into buffer structure if not using planes */
1076 if (!V4L2_TYPE_IS_MULTIPLANAR (allocator->type)) {
1077 group->buffer.bytesused = group->planes[0].bytesused;
1078 group->buffer.length = group->planes[0].length;
1079 group->buffer.m.fd = group->planes[0].m.userptr;
1081 group->buffer.length = group->n_mem;
1088 GST_ERROR_OBJECT (allocator, "Got %i dmabuf but needed %i", n_mem,
1094 GST_ERROR_OBJECT (allocator, "Memory %i is not of DMABUF", i);
1099 GST_ERROR_OBJECT (allocator, "Failed to dup DMABUF descriptor: %s",
1100 g_strerror (errno));
1106 gst_v4l2_allocator_import_userptr (GstV4l2Allocator * allocator,
1107 GstV4l2MemoryGroup * group, gsize img_size, int n_planes,
1108 gpointer * data, gsize * offset)
1113 g_return_val_if_fail (allocator->memory == V4L2_MEMORY_USERPTR, FALSE);
1115 /* TODO Support passing N plane from 1 memory to MPLANE v4l2 format */
1116 if (n_planes != group->n_mem)
1117 goto n_mem_missmatch;
1119 for (i = 0; i < group->n_mem; i++) {
1120 gsize size, maxsize;
1122 if (V4L2_TYPE_IS_MULTIPLANAR (allocator->type)) {
1123 struct v4l2_pix_format_mplane *pix = &allocator->format.fmt.pix_mp;
1124 maxsize = pix->plane_fmt[i].sizeimage;
1126 maxsize = allocator->format.fmt.pix.sizeimage;
1129 if ((i + 1) == n_planes) {
1130 size = img_size - offset[i];
1132 size = offset[i + 1] - offset[i];
1135 g_assert (size <= img_size);
1137 GST_LOG_OBJECT (allocator, "imported USERPTR %p plane %d size %"
1138 G_GSIZE_FORMAT, data[i], i, size);
1140 mem = (GstV4l2Memory *) group->mem[i];
1142 mem->mem.maxsize = maxsize;
1143 mem->mem.size = size;
1144 mem->data = data[i];
1146 group->planes[i].length = maxsize;
1147 group->planes[i].bytesused = size;
1148 group->planes[i].m.userptr = (unsigned long) data[i];
1149 group->planes[i].data_offset = 0;
1152 /* Copy into buffer structure if not using planes */
1153 if (!V4L2_TYPE_IS_MULTIPLANAR (allocator->type)) {
1154 group->buffer.bytesused = group->planes[0].bytesused;
1155 group->buffer.length = group->planes[0].length;
1156 group->buffer.m.userptr = group->planes[0].m.userptr;
1158 group->buffer.length = group->n_mem;
1165 GST_ERROR_OBJECT (allocator, "Got %i userptr plane while driver need %i",
1166 n_planes, group->n_mem);
1172 gst_v4l2_allocator_flush (GstV4l2Allocator * allocator)
1176 GST_OBJECT_LOCK (allocator);
1178 if (!allocator->active)
1181 for (i = 0; i < allocator->count; i++) {
1182 GstV4l2MemoryGroup *group = allocator->groups[i];
1185 if (IS_QUEUED (group->buffer)) {
1186 UNSET_QUEUED (group->buffer);
1188 for (n = 0; n < group->n_mem; n++)
1189 gst_memory_unref (group->mem[n]);
1194 GST_OBJECT_UNLOCK (allocator);
1198 gst_v4l2_allocator_qbuf (GstV4l2Allocator * allocator,
1199 GstV4l2MemoryGroup * group)
1201 gboolean ret = TRUE;
1205 if (V4L2_TYPE_IS_MULTIPLANAR (allocator->type)) {
1206 for (i = 0; i < group->n_mem; i++)
1207 group->planes[i].bytesused =
1208 gst_memory_get_sizes (group->mem[i], NULL, NULL);
1210 group->buffer.bytesused = gst_memory_get_sizes (group->mem[0], NULL, NULL);
1213 if (v4l2_ioctl (allocator->video_fd, VIDIOC_QBUF, &group->buffer) < 0) {
1214 GST_ERROR_OBJECT (allocator, "failed queing buffer %i: %s",
1215 group->buffer.index, g_strerror (errno));
1217 if (IS_QUEUED (group->buffer)) {
1218 GST_DEBUG_OBJECT (allocator,
1219 "driver pretends buffer is queued even if queue failed");
1220 UNSET_QUEUED (group->buffer);
1225 GST_LOG_OBJECT (allocator, "queued buffer %i (flags 0x%X)",
1226 group->buffer.index, group->buffer.flags);
1228 if (!IS_QUEUED (group->buffer)) {
1229 GST_DEBUG_OBJECT (allocator,
1230 "driver pretends buffer is not queued even if queue succeeded");
1231 SET_QUEUED (group->buffer);
1234 /* Ensure the memory will stay around and is RO */
1235 for (i = 0; i < group->n_mem; i++)
1236 gst_memory_ref (group->mem[i]);
1242 GstV4l2MemoryGroup *
1243 gst_v4l2_allocator_dqbuf (GstV4l2Allocator * allocator)
1245 struct v4l2_buffer buffer = { 0 };
1246 struct v4l2_plane planes[VIDEO_MAX_PLANES] = { {0} };
1249 GstV4l2MemoryGroup *group = NULL;
1251 buffer.type = allocator->type;
1252 buffer.memory = allocator->memory;
1254 if (V4L2_TYPE_IS_MULTIPLANAR (allocator->type)) {
1255 buffer.length = allocator->format.fmt.pix_mp.num_planes;
1256 buffer.m.planes = planes;
1259 if (v4l2_ioctl (allocator->video_fd, VIDIOC_DQBUF, &buffer) < 0)
1262 group = allocator->groups[buffer.index];
1263 group->buffer = buffer;
1265 GST_LOG_OBJECT (allocator, "dequeued buffer %i (flags 0x%X)", buffer.index,
1268 if (IS_QUEUED (group->buffer)) {
1269 GST_DEBUG_OBJECT (allocator,
1270 "driver pretends buffer is queued even if dequeue succeeded");
1271 UNSET_QUEUED (group->buffer);
1274 if (V4L2_TYPE_IS_MULTIPLANAR (allocator->type)) {
1275 group->buffer.m.planes = group->planes;
1276 memcpy (group->planes, buffer.m.planes, sizeof (planes));
1278 group->planes[0].bytesused = group->buffer.bytesused;
1279 group->planes[0].length = group->buffer.length;
1280 g_assert (sizeof (group->planes[0].m) == sizeof (group->buffer.m));
1281 memcpy (&group->planes[0].m, &group->buffer.m, sizeof (group->buffer.m));
1284 /* And update memory size */
1285 if (V4L2_TYPE_IS_OUTPUT (allocator->type)) {
1286 gst_v4l2_allocator_reset_size (allocator, group);
1288 /* for capture, simply read the size */
1289 for (i = 0; i < group->n_mem; i++) {
1290 gst_memory_resize (group->mem[i], 0, group->planes[i].bytesused);
1294 /* Release the memory, possibly making it RW again */
1295 for (i = 0; i < group->n_mem; i++)
1296 gst_memory_unref (group->mem[i]);
1301 GST_ERROR_OBJECT (allocator, "failed dequeuing a %s buffer: %s",
1302 memory_type_to_str (allocator->memory), g_strerror (errno));
1306 GST_WARNING_OBJECT (allocator,
1307 "Non-blocking I/O has been selected using O_NONBLOCK and"
1308 " no buffer was in the outgoing queue.");
1311 GST_ERROR_OBJECT (allocator,
1312 "The buffer type is not supported, or the index is out of bounds, "
1313 "or no buffers have been allocated yet, or the userptr "
1314 "or length are invalid.");
1317 GST_ERROR_OBJECT (allocator,
1318 "insufficient memory to enqueue a user pointer buffer");
1321 GST_INFO_OBJECT (allocator,
1322 "VIDIOC_DQBUF failed due to an internal error."
1323 " Can also indicate temporary problems like signal loss."
1324 " Note the driver might dequeue an (empty) buffer despite"
1325 " returning an error, or even stop capturing.");
1326 /* have we de-queued a buffer ? */
1327 if (!IS_QUEUED (buffer)) {
1328 GST_DEBUG_OBJECT (allocator, "reenqueing buffer");
1329 /* FIXME ... should we do something here? */
1333 GST_WARNING_OBJECT (allocator, "could not sync on a buffer on device");
1336 GST_WARNING_OBJECT (allocator,
1337 "Grabbing frame got interrupted unexpectedly. %d: %s.", errno,
1338 g_strerror (errno));
1346 gst_v4l2_allocator_reset_group (GstV4l2Allocator * allocator,
1347 GstV4l2MemoryGroup * group)
1349 switch (allocator->memory) {
1350 case V4L2_MEMORY_USERPTR:
1351 gst_v4l2_allocator_clear_userptr (allocator, group);
1353 case V4L2_MEMORY_DMABUF:
1354 gst_v4l2_allocator_clear_dmabufin (allocator, group);
1356 case V4L2_MEMORY_MMAP:
1357 gst_v4l2_allocator_reset_size (allocator, group);
1360 g_assert_not_reached ();