#define GST_CAT_DEFAULT v4l2_debug
/*
- * GstV4l2Buffer:
- */
-GType
-gst_v4l2_meta_api_get_type (void)
-{
- static volatile GType type;
- static const gchar *tags[] =
- { GST_META_TAG_VIDEO_STR, GST_META_TAG_MEMORY_STR, NULL };
-
- if (g_once_init_enter (&type)) {
- GType _type = gst_meta_api_type_register ("GstV4l2MetaAPI", tags);
- g_once_init_leave (&type, _type);
- }
- return type;
-}
-
-const GstMetaInfo *
-gst_v4l2_meta_get_info (void)
-{
- static const GstMetaInfo *meta_info = NULL;
-
- if (g_once_init_enter (&meta_info)) {
- const GstMetaInfo *meta =
- gst_meta_register (gst_v4l2_meta_api_get_type (), "GstV4l2Meta",
- sizeof (GstV4l2Meta), (GstMetaInitFunction) NULL,
- (GstMetaFreeFunction) NULL, (GstMetaTransformFunction) NULL);
- g_once_init_leave (&meta_info, meta);
- }
- return meta_info;
-}
-
-/*
* GstV4l2BufferPool:
*/
#define gst_v4l2_buffer_pool_parent_class parent_class
G_DEFINE_TYPE (GstV4l2BufferPool, gst_v4l2_buffer_pool, GST_TYPE_BUFFER_POOL);
+enum _GstV4l2BufferPoolAcquireFlags
+{
+ GST_V4L2_POOL_ACQUIRE_FLAG_RESURECT = GST_BUFFER_POOL_ACQUIRE_FLAG_LAST,
+ GST_V4L2_BUFFER_POOL_ACQUIRE_FAG_LAST
+};
+
static void gst_v4l2_buffer_pool_release_buffer (GstBufferPool * bpool,
GstBuffer * buffer);
-static void
-gst_v4l2_buffer_pool_free_buffer (GstBufferPool * bpool, GstBuffer * buffer)
+static gboolean
+gst_v4l2_is_buffer_valid (GstBuffer * buffer, GstV4l2MemoryGroup ** group)
{
- GstV4l2BufferPool *pool = GST_V4L2_BUFFER_POOL (bpool);
- GstV4l2Object *obj;
+ GstMemory *mem = gst_buffer_peek_memory (buffer, 0);
+ gboolean valid = FALSE;
- obj = pool->obj;
+ if (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_TAG_MEMORY))
+ goto done;
- switch (obj->mode) {
- case GST_V4L2_IO_RW:
- case GST_V4L2_IO_DMABUF:
- break;
- case GST_V4L2_IO_MMAP:
- {
- GstV4l2Meta *meta;
- gint index;
- gint i = 0;
-
- meta = GST_V4L2_META_GET (buffer);
- g_assert (meta != NULL);
-
- index = meta->vbuffer.index;
-
- for (i = 0; i < meta->n_planes; i++) {
- GST_LOG_OBJECT (pool,
- "unmap multiplanar buffer %p idx %d (data %p, len %u, plane %u)",
- buffer, index, meta->mem[i], meta->vplanes[i].length, i);
-
- v4l2_munmap (meta->mem[i], meta->vplanes[i].length);
- }
-
- pool->buffers[index] = NULL;
- break;
- }
- case GST_V4L2_IO_USERPTR:
- default:
- g_assert_not_reached ();
- break;
+ if (gst_is_v4l2_memory (mem)) {
+ GstV4l2Memory *vmem = (GstV4l2Memory *) mem;
+ valid = TRUE;
+ if (group)
+ *group = vmem->group;
}
- gst_buffer_unref (buffer);
+
+done:
+ return valid;
}
static GstFlowReturn
GstBufferPoolAcquireParams * params)
{
GstV4l2BufferPool *pool = GST_V4L2_BUFFER_POOL (bpool);
- GstBuffer *newbuf;
- GstV4l2Meta *meta;
+ GstV4l2MemoryGroup *group = NULL;
+ GstBuffer *newbuf = NULL;
GstV4l2Object *obj;
GstVideoInfo *info;
GstVideoAlignment *align;
- guint index;
- gint i;
obj = pool->obj;
info = &obj->info;
switch (obj->mode) {
case GST_V4L2_IO_RW:
- {
newbuf =
gst_buffer_new_allocate (pool->allocator, pool->size, &pool->params);
break;
- }
case GST_V4L2_IO_MMAP:
+ group = gst_v4l2_allocator_alloc_mmap (pool->vallocator);
+ break;
case GST_V4L2_IO_DMABUF:
- {
- if (pool->num_allocated == pool->num_buffers) {
- struct v4l2_create_buffers create_bufs;
-
- memset (&create_bufs, 0, sizeof (struct v4l2_create_buffers));
- create_bufs.count = 1;
- create_bufs.memory = V4L2_MEMORY_MMAP;
- create_bufs.format = obj->format;
-
- if (v4l2_ioctl (pool->video_fd, VIDIOC_CREATE_BUFS, &create_bufs) < 0)
- goto create_bufs_failed;
-
- GST_LOG_OBJECT (pool, "created buffer with index: %u",
- create_bufs.index);
- pool->num_buffers++;
- pool->buffers = g_renew (GstBuffer *, pool->buffers, pool->num_buffers);
- pool->buffers[pool->num_buffers - 1] = NULL;
- }
-
- newbuf = gst_buffer_new ();
- meta = GST_V4L2_META_ADD (newbuf);
-
- index = pool->num_allocated;
-
- GST_LOG_OBJECT (pool, "creating buffer %u, %p", index, newbuf);
-
- /* prepare the buffer */
- memset (&meta->vbuffer, 0x0, sizeof (struct v4l2_buffer));
- meta->vbuffer.index = index;
- meta->vbuffer.type = obj->type;
- meta->vbuffer.memory = V4L2_MEMORY_MMAP;
-
- /* main information */
- meta->n_planes = obj->n_v4l2_planes;
-
- /* prepare the planes of the buffer */
- if (V4L2_TYPE_IS_MULTIPLANAR (obj->type)) {
- /* length is the number of elements in the
- * vplanes array */
- meta->vbuffer.length = obj->n_v4l2_planes;
- meta->vbuffer.m.planes = meta->vplanes;
- }
-
- /* the buffer is prepared, now fill in it with meaningful values */
- if (v4l2_ioctl (pool->video_fd, VIDIOC_QUERYBUF, &meta->vbuffer) < 0)
- goto querybuf_failed;
-
- /* in non MPLANE mode we emulate one plane in order to
- * factorize the code */
- if (!V4L2_TYPE_IS_MULTIPLANAR (obj->type)) {
- /* here meta->n_planes == 1 */
- meta->vplanes[0].length = meta->vbuffer.length;
- meta->vplanes[0].bytesused = meta->vbuffer.bytesused;
- meta->vplanes[0].m.mem_offset = meta->vbuffer.m.offset;
- meta->vplanes[0].data_offset = 0;
- }
-
- GST_LOG_OBJECT (pool, " index: %u", meta->vbuffer.index);
- GST_LOG_OBJECT (pool, " type: %d", meta->vbuffer.type);
- GST_LOG_OBJECT (pool, " flags: %08x", meta->vbuffer.flags);
- GST_LOG_OBJECT (pool, " field: %d", meta->vbuffer.field);
- GST_LOG_OBJECT (pool, " memory: %d", meta->vbuffer.memory);
- GST_LOG_OBJECT (pool, " planes: %d", meta->n_planes);
-
-#ifndef GST_DISABLE_GST_DEBUG
- if (meta->vbuffer.memory == V4L2_MEMORY_MMAP) {
- for (i = 0; i < meta->n_planes; i++) {
- GST_LOG_OBJECT (pool, " bytesused: %u, plane: %u",
- meta->vplanes[i].bytesused, i);
- GST_LOG_OBJECT (pool, " MMAP offset: %u, plane: %u",
- meta->vplanes[i].m.mem_offset, i);
- }
- }
-#endif
-
- if (obj->mode == GST_V4L2_IO_MMAP) {
- /* append one gstmemory for each plane */
- for (i = 0; i < meta->n_planes; i++) {
- meta->mem[i] = v4l2_mmap (0, meta->vplanes[i].length,
- PROT_READ | PROT_WRITE, MAP_SHARED, pool->video_fd,
- meta->vplanes[i].m.mem_offset);
- if (meta->mem[i] == MAP_FAILED)
- goto mmap_failed;
-
- GST_LOG_OBJECT (pool, " buffer length %d, data offset %d, plane %d",
- meta->vplanes[i].length, meta->vplanes[i].data_offset, i);
-
- gst_buffer_append_memory (newbuf,
- gst_memory_new_wrapped (GST_MEMORY_FLAG_NO_SHARE,
- meta->mem[i], meta->vplanes[i].length,
- meta->vplanes[i].data_offset,
- meta->vplanes[i].length, NULL, NULL));
- }
- }
-
- if (obj->mode == GST_V4L2_IO_DMABUF) {
- struct v4l2_exportbuffer expbuf;
-
- memset (&expbuf, 0, sizeof (struct v4l2_exportbuffer));
- expbuf.type = meta->vbuffer.type;
- expbuf.index = meta->vbuffer.index;
- expbuf.flags = O_CLOEXEC;
-
- for (i = 0; i < meta->n_planes; i++) {
- expbuf.plane = i;
-
- if (v4l2_ioctl (pool->video_fd, VIDIOC_EXPBUF, &expbuf) < 0)
- goto expbuf_failed;
-
- gst_buffer_append_memory (newbuf,
- gst_dmabuf_allocator_alloc (pool->allocator, expbuf.fd,
- meta->vplanes[i].length));
- }
-
- meta->vbuffer.memory = V4L2_MEMORY_DMABUF;
-
- /* in non-MPLANE mode our meta is not automatically updated
- * because the plane is emulated (not referenced by
- * meta->vbuffer) */
- if (!V4L2_TYPE_IS_MULTIPLANAR (obj->type))
- meta->vplanes[0].m.fd = meta->vbuffer.m.fd;
- }
-
- /* add metadata to raw video buffers */
- if (pool->add_videometa && info->finfo) {
- const GstVideoFormatInfo *finfo = info->finfo;
- gsize offset[GST_VIDEO_MAX_PLANES];
- gint width, height, n_gst_planes, offs, i, stride[GST_VIDEO_MAX_PLANES];
-
- width = GST_VIDEO_INFO_WIDTH (info);
- height = GST_VIDEO_INFO_HEIGHT (info);
-
- /* n_gst_planes is the number of planes
- * (RGB: 1, YUY2: 1, NV12: 2, I420: 3)
- * It's greater or equal than the number of v4l2 planes. */
- n_gst_planes = GST_VIDEO_INFO_N_PLANES (info);
-
- /* the basic are common between MPLANE mode and non MPLANE mode
- * except a special case inside the loop at the end
- */
- offs = 0;
- for (i = 0; i < n_gst_planes; i++) {
- GST_DEBUG_OBJECT (pool, "adding video meta, bytesperline %d",
- obj->bytesperline[i]);
-
- offset[i] = offs;
-
- if (GST_VIDEO_FORMAT_INFO_IS_TILED (finfo)) {
- guint x_tiles, y_tiles, ws, hs, tile_height;
-
- ws = GST_VIDEO_FORMAT_INFO_TILE_WS (finfo);
- hs = GST_VIDEO_FORMAT_INFO_TILE_HS (finfo);
- tile_height = 1 << hs;
-
- x_tiles = obj->bytesperline[i] >> ws;
- y_tiles = GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (finfo, i,
- GST_ROUND_UP_N (height, tile_height) >> hs);
- stride[i] = GST_VIDEO_TILE_MAKE_STRIDE (x_tiles, y_tiles);
- } else {
- stride[i] = obj->bytesperline[i];
- }
-
- /* when using multiplanar mode and if there is more then one v4l
- * plane for each gst plane
- */
- if (V4L2_TYPE_IS_MULTIPLANAR (obj->type) && meta->n_planes > 1)
- /* non_contiguous case here so we have to make sure that gst goes to the
- * next plane (using default gstvideometa.c::default_map).
- * And the next plane is after length bytes of the previous one from
- * the gst buffer point of view. */
- offs += meta->vplanes[i].length;
- else
- offs += obj->bytesperline[i] *
- GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (finfo, i, height);
- }
-
- gst_buffer_add_video_meta_full (newbuf, GST_VIDEO_FRAME_FLAG_NONE,
- GST_VIDEO_INFO_FORMAT (info), width, height, n_gst_planes,
- offset, stride);
- }
-
- if (pool->add_cropmeta) {
- GstVideoCropMeta *crop;
- crop = gst_buffer_add_video_crop_meta (newbuf);
- crop->x = align->padding_left;
- crop->y = align->padding_top;
- crop->width = info->width;
- crop->width = info->height;
- }
+ /* TODO group = gst_v4l2_allocator_alloc_dmabuf (pool->vallocator); */
break;
- }
case GST_V4L2_IO_USERPTR:
default:
newbuf = NULL;
g_assert_not_reached ();
+ break;
}
- pool->num_allocated++;
+ if (group != NULL) {
+ gint i;
+ newbuf = gst_buffer_new ();
- *buffer = newbuf;
+ for (i = 0; i < group->n_mem; i++)
+ gst_buffer_append_memory (newbuf, group->mem[i]);
+ } else if (newbuf == NULL) {
+ goto allocation_failed;
+ }
- return GST_FLOW_OK;
+ /* add metadata to raw video buffers */
+ if (pool->add_videometa && info->finfo) {
+ const GstVideoFormatInfo *finfo = info->finfo;
+ gsize offset[GST_VIDEO_MAX_PLANES];
+ gint width, height, n_gst_planes, offs, i, stride[GST_VIDEO_MAX_PLANES];
+
+ width = GST_VIDEO_INFO_WIDTH (info);
+ height = GST_VIDEO_INFO_HEIGHT (info);
+
+ /* n_gst_planes is the number of planes
+ * (RGB: 1, YUY2: 1, NV12: 2, I420: 3)
+ * It's greater or equal than the number of v4l2 planes. */
+ n_gst_planes = GST_VIDEO_INFO_N_PLANES (info);
+
+ /* the basic are common between MPLANE mode and non MPLANE mode
+ * except a special case inside the loop at the end
+ */
+ offs = 0;
+ for (i = 0; i < n_gst_planes; i++) {
+ GST_DEBUG_OBJECT (pool, "adding video meta, bytesperline %d",
+ obj->bytesperline[i]);
+
+ offset[i] = offs;
+
+ if (GST_VIDEO_FORMAT_INFO_IS_TILED (finfo)) {
+ guint x_tiles, y_tiles, ws, hs, tile_height;
+
+ ws = GST_VIDEO_FORMAT_INFO_TILE_WS (finfo);
+ hs = GST_VIDEO_FORMAT_INFO_TILE_HS (finfo);
+ tile_height = 1 << hs;
+
+ x_tiles = obj->bytesperline[i] >> ws;
+ y_tiles = GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (finfo, i,
+ GST_ROUND_UP_N (height, tile_height) >> hs);
+ stride[i] = GST_VIDEO_TILE_MAKE_STRIDE (x_tiles, y_tiles);
+ } else {
+ stride[i] = obj->bytesperline[i];
+ }
- /* ERRORS */
-create_bufs_failed:
- {
- gint errnosave = errno;
+ /* when using multiplanar mode and if there is more then one v4l
+ * plane for each gst plane
+ */
+ if (V4L2_TYPE_IS_MULTIPLANAR (obj->type) && group->n_mem > 1)
+ /* non_contiguous case here so we have to make sure that gst goes to the
+ * next plane (using default gstvideometa.c::default_map).
+ * And the next plane is after length bytes of the previous one from
+ * the gst buffer point of view. */
+ offs += gst_memory_get_sizes (group->mem[i], NULL, NULL);
+ else
+ offs += obj->bytesperline[i] *
+ GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (finfo, i, height);
+ }
- GST_WARNING ("Failed CREATE_BUFS: %s", g_strerror (errnosave));
- errno = errnosave;
- return GST_FLOW_ERROR;
+ gst_buffer_add_video_meta_full (newbuf, GST_VIDEO_FRAME_FLAG_NONE,
+ GST_VIDEO_INFO_FORMAT (info), width, height, n_gst_planes,
+ offset, stride);
}
-querybuf_failed:
- {
- gint errnosave = errno;
- GST_WARNING ("Failed QUERYBUF: %s", g_strerror (errnosave));
- gst_buffer_unref (newbuf);
- errno = errnosave;
- return GST_FLOW_ERROR;
+ if (pool->add_cropmeta) {
+ GstVideoCropMeta *crop;
+ crop = gst_buffer_add_video_crop_meta (newbuf);
+ crop->x = align->padding_left;
+ crop->y = align->padding_top;
+ crop->width = info->width;
+ crop->width = info->height;
}
-mmap_failed:
- {
- gint errnosave = errno;
- GST_WARNING ("Failed to mmap: %s", g_strerror (errnosave));
- gst_buffer_unref (newbuf);
- errno = errnosave;
- return GST_FLOW_ERROR;
- }
-expbuf_failed:
- {
- gint errnosave = errno;
+ pool->num_allocated++;
+ *buffer = newbuf;
- GST_WARNING ("Failed EXPBUF: %s", g_strerror (errnosave));
- gst_buffer_unref (newbuf);
- errno = errnosave;
- return GST_FLOW_ERROR;
+ return GST_FLOW_OK;
+
+ /* ERRORS */
+allocation_failed:
+ {
+ GST_WARNING ("Failed to allocated buffer");
+ return GST_FLOW_EOS;
}
}
guint size, min_buffers, max_buffers;
GstAllocator *allocator;
GstAllocationParams params;
-
- GST_DEBUG_OBJECT (pool, "set config");
+ gboolean can_allocate = FALSE;
+ gboolean updated = FALSE;
+ gboolean ret;
pool->add_videometa =
gst_buffer_pool_config_has_option (config,
&max_buffers))
goto wrong_config;
- /* FIXME Check alignement, and S_FMT with new size if different */
-
if (!gst_buffer_pool_config_get_allocator (config, &allocator, ¶ms))
goto wrong_config;
GST_DEBUG_OBJECT (pool, "config %" GST_PTR_FORMAT, config);
- if (obj->mode == GST_V4L2_IO_DMABUF)
- allocator = gst_dmabuf_allocator_new ();
- else if (allocator)
- gst_object_ref (allocator);
-
if (pool->allocator)
gst_object_unref (pool->allocator);
- pool->allocator = allocator;
+ pool->allocator = NULL;
- pool->params = params;
+ switch (obj->mode) {
+ case GST_V4L2_IO_DMABUF:
+ pool->allocator = gst_dmabuf_allocator_new ();
+ can_allocate = GST_V4L2_ALLOCATOR_CAN_ALLOCATE (pool->vallocator, MMAP);
+ break;
+ case GST_V4L2_IO_MMAP:
+ can_allocate = GST_V4L2_ALLOCATOR_CAN_ALLOCATE (pool->vallocator, MMAP);
+ break;
+ case GST_V4L2_IO_USERPTR:
+ can_allocate =
+ GST_V4L2_ALLOCATOR_CAN_ALLOCATE (pool->vallocator, USERPTR);
+ break;
+ case GST_V4L2_IO_RW:
+ default:
+ pool->allocator = g_object_ref (allocator);
+ pool->params = params;
+ /* No need to change the configuration */
+ goto done;
+ break;
+ }
- gst_buffer_pool_config_set_params (config, caps, size, min_buffers,
- max_buffers);
+ if (min_buffers < GST_V4L2_MIN_BUFFERS) {
+ updated = TRUE;
+ min_buffers = GST_V4L2_MIN_BUFFERS;
+ GST_INFO_OBJECT (pool, "increasing minimum buffers to %u", min_buffers);
+ }
- return GST_BUFFER_POOL_CLASS (parent_class)->set_config (bpool, config);
+ if (max_buffers > VIDEO_MAX_FRAME || max_buffers == 0) {
+ updated = TRUE;
+ max_buffers = VIDEO_MAX_FRAME;
+ GST_INFO_OBJECT (pool, "reducing maximum buffers to %u", max_buffers);
+ }
+
+ if (min_buffers > max_buffers) {
+ updated = TRUE;
+ min_buffers = max_buffers;
+ GST_INFO_OBJECT (pool, "reducing minimum buffers to %u", min_buffers);
+ } else if (min_buffers != max_buffers) {
+ if (!can_allocate) {
+ updated = TRUE;
+ max_buffers = min_buffers;
+ GST_INFO_OBJECT (pool, "can't allocate, setting maximum to minimum");
+ }
+ }
+
+ if (updated)
+ gst_buffer_pool_config_set_params (config, caps, size, min_buffers,
+ max_buffers);
+
+done:
+ ret = GST_BUFFER_POOL_CLASS (parent_class)->set_config (bpool, config);
+
+ /* If anything was changed documentation recommand to return FALSE */
+ return !updated && ret;
/* ERRORS */
missing_video_api:
}
}
+static void
+gst_v4l2_buffer_pool_group_released (GstV4l2BufferPool * pool)
+{
+ GstBufferPoolAcquireParams params = { 0 };
+ GstBuffer *buffer = NULL;
+ GstFlowReturn ret;
+
+ GST_DEBUG_OBJECT (pool, "A buffer was lost, reallocating it");
+
+ params.flags = GST_V4L2_POOL_ACQUIRE_FLAG_RESURECT;
+ ret = gst_buffer_pool_acquire_buffer (GST_BUFFER_POOL (pool), &buffer,
+ ¶ms);
+
+ if (ret == GST_FLOW_OK)
+ gst_buffer_unref (buffer);
+}
+
static gboolean
gst_v4l2_buffer_pool_start (GstBufferPool * bpool)
{
GstV4l2Object *obj = pool->obj;
GstStructure *config;
GstCaps *caps;
- guint size, num_buffers, min_buffers, max_buffers, copy_threshold;
- struct v4l2_requestbuffers breq;
+ guint size, min_buffers, max_buffers;
+ guint num_buffers = 0, copy_threshold = 0;
config = gst_buffer_pool_get_config (bpool);
if (!gst_buffer_pool_config_get_params (config, &caps, &size, &min_buffers,
/* we preallocate 1 buffer, this value also instructs the latency
* calculation to have 1 frame latency max */
num_buffers = 1;
- copy_threshold = 0;
break;
case GST_V4L2_IO_DMABUF:
case GST_V4L2_IO_MMAP:
{
- /* request a reasonable number of buffers when no max specified. We will
- * copy when we run out of buffers */
- if (max_buffers == 0)
- num_buffers = MAX (4, min_buffers);
- else
+ guint count;
+
+ if (GST_V4L2_ALLOCATOR_CAN_ALLOCATE (pool->vallocator, MMAP)) {
+ num_buffers = min_buffers;
+ } else {
num_buffers = max_buffers;
+ }
/* first, lets request buffers, and see how many we can get: */
- GST_DEBUG_OBJECT (pool, "starting, requesting %d MMAP buffers",
- num_buffers);
-
- memset (&breq, 0, sizeof (struct v4l2_requestbuffers));
- breq.type = obj->type;
- breq.count = num_buffers;
- breq.memory = V4L2_MEMORY_MMAP;
+ GST_DEBUG_OBJECT (pool, "requesting %d MMAP buffers", num_buffers);
- if (v4l2_ioctl (pool->video_fd, VIDIOC_REQBUFS, &breq) < 0)
- goto reqbufs_failed;
+ count = gst_v4l2_allocator_start (pool->vallocator, num_buffers,
+ V4L2_MEMORY_MMAP);
- GST_LOG_OBJECT (pool, " count: %u", breq.count);
- GST_LOG_OBJECT (pool, " type: %d", breq.type);
- GST_LOG_OBJECT (pool, " memory: %d", breq.memory);
-
- if (breq.count < GST_V4L2_MIN_BUFFERS)
+ if (count < GST_V4L2_MIN_BUFFERS) {
+ num_buffers = count;
goto no_buffers;
-
- if (num_buffers != breq.count) {
- GST_WARNING_OBJECT (pool, "using %u buffers instead", breq.count);
- num_buffers = breq.count;
}
- /* update min buffers with the amount of buffers we just reserved. We need
- * to configure this value in the bufferpool so that the default start
- * implementation calls our allocate function */
- min_buffers = breq.count;
-
- if (max_buffers == 0 || num_buffers < max_buffers) {
- /* if we are asked to provide more buffers than we have allocated, start
- * copying buffers when we only have 2 buffers left in the pool */
- copy_threshold = 2;
- } else {
- /* we are certain that we have enough buffers so we don't need to
- * copy */
- copy_threshold = 0;
+
+ /* V4L2 buffer pool are often very limited in the amount of buffers it
+ * can offer. The copy_threshold will workaround this limitation by
+ * falling back to copy if the pipeline needed more buffers. This also
+ * prevent having to do REQBUFS(N)/REQBUFS(0) everytime configure is
+ * called. */
+ if (count != num_buffers) {
+ GST_WARNING_OBJECT (pool, "using %u buffers instead of %u",
+ count, num_buffers);
+ num_buffers = count;
+ copy_threshold =
+ MAX (GST_V4L2_MIN_BUFFERS, obj->min_buffers_for_capture);
+
+ /* Ensure GstBufferPool don't expect initial minimum */
+ if (min_buffers > count)
+ min_buffers = count;
}
- /* FIXME try to call CREATEBUFS with count 0 to check if max shall
- * remain 0 */
break;
}
case GST_V4L2_IO_USERPTR:
}
pool->size = size;
- pool->num_buffers = num_buffers;
pool->copy_threshold = copy_threshold;
+ pool->num_buffers = num_buffers;
+ pool->num_allocated = 0;
+ pool->num_queued = 0;
gst_buffer_pool_config_set_params (config, caps, size, min_buffers,
max_buffers);
GST_BUFFER_POOL_CLASS (parent_class)->set_config (bpool, config);
-
- pool->obj = obj;
- pool->buffers = g_new0 (GstBuffer *, pool->num_buffers);
- pool->num_allocated = 0;
+ gst_structure_free (config);
/* now, allocate the buffers: */
if (!GST_BUFFER_POOL_CLASS (parent_class)->start (bpool))
if (!start_streaming (pool))
goto start_failed;
+ if (!V4L2_TYPE_IS_OUTPUT (obj->type))
+ pool->group_released_handler =
+ g_signal_connect_swapped (pool->vallocator, "group-released",
+ G_CALLBACK (gst_v4l2_buffer_pool_group_released), pool);
+
gst_poll_set_flushing (obj->poll, FALSE);
return TRUE;
GST_ERROR_OBJECT (pool, "invalid config %" GST_PTR_FORMAT, config);
return FALSE;
}
-reqbufs_failed:
- {
- GST_ERROR_OBJECT (pool,
- "error requesting %d buffers: %s", num_buffers, g_strerror (errno));
- return FALSE;
- }
no_buffers:
{
GST_ERROR_OBJECT (pool,
- "we received %d from device '%s', we want at least %d",
- breq.count, obj->videodev, GST_V4L2_MIN_BUFFERS);
+ "we received %d buffer from device '%s', we want at least %d",
+ num_buffers, obj->videodev, GST_V4L2_MIN_BUFFERS);
return FALSE;
}
start_failed:
}
}
-static void
-gst_v4l2_buffer_pool_free_buffers (GstV4l2BufferPool * pool)
-{
- if (pool->num_buffers > 0) {
- struct v4l2_requestbuffers breq;
- memset (&breq, 0, sizeof (struct v4l2_requestbuffers));
- breq.type = pool->obj->type;
- breq.count = 0;
- breq.memory = V4L2_MEMORY_MMAP;
- if (v4l2_ioctl (pool->video_fd, VIDIOC_REQBUFS, &breq) < 0) {
- GST_ERROR_OBJECT (pool, "error releasing buffers: %s",
- g_strerror (errno));
- }
- pool->num_buffers = 0;
- }
-}
static gboolean
stop_streaming (GstV4l2BufferPool * pool)
{
GstV4l2Object *obj = pool->obj;
+ gint i;
GST_DEBUG_OBJECT (pool, "stopping stream");
GST_DEBUG_OBJECT (pool, "STREAMOFF");
if (v4l2_ioctl (pool->video_fd, VIDIOC_STREAMOFF, &obj->type) < 0)
goto stop_failed;
+
+ gst_v4l2_allocator_flush (pool->vallocator);
+
+ for (i = 0; i < pool->num_allocated; i++) {
+ if (pool->buffers[i]) {
+ GstBufferPool *bpool = (GstBufferPool *) pool;
+ GstBuffer *buffer = pool->buffers[i];
+
+ pool->buffers[i] = NULL;
+ pool->num_queued--;
+
+ if (V4L2_TYPE_IS_OUTPUT (obj->type))
+ gst_buffer_unref (buffer);
+ else
+ /* Give back the outstanding buffer to the pool */
+ GST_BUFFER_POOL_CLASS (parent_class)->release_buffer (bpool,
+ buffer);
+ }
+ }
+ g_return_val_if_fail (pool->num_queued == 0, FALSE);
+
break;
default:
- g_assert_not_reached ();
+ g_return_val_if_reached (FALSE);
break;
}
gboolean ret;
GstV4l2BufferPool *pool = GST_V4L2_BUFFER_POOL (bpool);
GstV4l2Object *obj = pool->obj;
- guint n;
GST_DEBUG_OBJECT (pool, "stopping pool");
- gst_poll_set_flushing (obj->poll, TRUE);
-
- if (pool->streaming) {
- switch (obj->mode) {
- case GST_V4L2_IO_RW:
- break;
- case GST_V4L2_IO_MMAP:
- case GST_V4L2_IO_USERPTR:
- case GST_V4L2_IO_DMABUF:
- /* we actually need to sync on all queued buffers but not
- * on the non-queued ones */
- GST_DEBUG_OBJECT (pool, "STREAMOFF");
- if (v4l2_ioctl (pool->video_fd, VIDIOC_STREAMOFF, &obj->type) < 0)
- goto stop_failed;
- break;
- default:
- g_assert_not_reached ();
- break;
- }
- pool->streaming = FALSE;
+ if (pool->group_released_handler > 0) {
+ g_signal_handler_disconnect (pool->vallocator,
+ pool->group_released_handler);
+ pool->group_released_handler = 0;
}
- /* first free the buffers in the queue */
+ gst_poll_set_flushing (obj->poll, TRUE);
+ if (!stop_streaming (pool))
+ goto stop_failed;
+
ret = GST_BUFFER_POOL_CLASS (parent_class)->stop (bpool);
- /* then free the remaining buffers */
- for (n = 0; n < pool->num_buffers; n++) {
- if (pool->buffers[n])
- gst_v4l2_buffer_pool_free_buffer (bpool, pool->buffers[n]);
- }
- pool->num_queued = 0;
- g_free (pool->buffers);
- pool->buffers = NULL;
+ if (ret) {
+ GstV4l2Return vret;
+
+ vret = gst_v4l2_allocator_stop (pool->vallocator);
- gst_v4l2_buffer_pool_free_buffers (pool);
+ if (vret == GST_V4L2_BUSY) {
+ GST_WARNING_OBJECT (pool, "allocated buffer need to be reclaimed");
+ /* FIXME deal with reclaiming */
+ } else if (vret == GST_V4L2_ERROR) {
+ ret = FALSE;
+ }
+ }
return ret;
static GstFlowReturn
gst_v4l2_buffer_pool_qbuf (GstV4l2BufferPool * pool, GstBuffer * buf)
{
- GstV4l2Meta *meta;
+ GstV4l2MemoryGroup *group = NULL;
gint index;
- gint i = 0;
- meta = GST_V4L2_META_GET (buf);
- if (meta == NULL) {
- GST_LOG_OBJECT (pool, "unref copied buffer %p", buf);
- /* no meta, it was a copied buffer that we can unref */
+ if (!gst_v4l2_is_buffer_valid (buf, &group)) {
+ GST_LOG_OBJECT (pool, "unref copied/invalid buffer %p", buf);
gst_buffer_unref (buf);
return GST_FLOW_OK;
}
- index = meta->vbuffer.index;
-
- /* this field is common to MPLANE and not MPLANE */
- meta->vbuffer.bytesused = gst_buffer_get_size (buf);
-
- for (i = 0; i < meta->n_planes; i++) {
- meta->vplanes[i].bytesused =
- gst_buffer_get_sizes_range (buf, i, 1, NULL, NULL);
-
- GST_LOG_OBJECT (pool,
- "enqueue buffer %p, index:%d, queued:%d, flags:%08x mem:%p used:%d, plane:%d",
- buf, index, pool->num_queued, meta->vbuffer.flags,
- meta->mem[i], meta->vplanes[i].bytesused, i);
- }
+ index = group->buffer.index;
if (pool->buffers[index] != NULL)
goto already_queued;
- GST_LOG_OBJECT (pool, "doing QBUF");
- if (v4l2_ioctl (pool->video_fd, VIDIOC_QBUF, &meta->vbuffer) < 0)
+ GST_LOG_OBJECT (pool, "queuing buffer %i", index);
+
+ if (!gst_v4l2_allocator_qbuf (pool->vallocator, group))
goto queue_failed;
pool->buffers[index] = buf;
return GST_FLOW_OK;
- /* ERRORS */
already_queued:
{
- GST_WARNING_OBJECT (pool, "the buffer was already queued");
+ GST_ERROR_OBJECT (pool, "the buffer %i was already queued", index);
+ gst_buffer_unref (buf);
return GST_FLOW_ERROR;
}
queue_failed:
{
- GST_WARNING_OBJECT (pool, "could not queue a buffer %d (%s)", errno,
- g_strerror (errno));
+ GST_ERROR_OBJECT (pool, "could not queue a buffer %i", index);
+ /* Return broken buffer to the allocator */
+ GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_TAG_MEMORY);
+ gst_buffer_unref (buf);
return GST_FLOW_ERROR;
}
}
{
GstFlowReturn res;
GstBuffer *outbuf;
- struct v4l2_buffer vbuffer;
- struct v4l2_plane vplanes[GST_VIDEO_MAX_PLANES];
GstV4l2Object *obj = pool->obj;
GstClockTime timestamp;
- GstV4l2Meta *meta;
+ GstV4l2MemoryGroup *group;
gint i;
if ((res = gst_v4l2_object_poll (obj)) != GST_FLOW_OK)
- goto poll_error;
-
- /* prepare the buffer */
- memset (&vbuffer, 0x00, sizeof (vbuffer));
- vbuffer.type = obj->type;
-
- if (obj->mode == GST_V4L2_IO_DMABUF)
- vbuffer.memory = V4L2_MEMORY_DMABUF;
- else
- vbuffer.memory = V4L2_MEMORY_MMAP;
-
- /* prepare the planes of the buffer */
- if (V4L2_TYPE_IS_MULTIPLANAR (obj->type)) {
- /* length is the number of elements in the
- * vplanes array */
- vbuffer.length = obj->n_v4l2_planes;
- vbuffer.m.planes = vplanes;
- }
+ goto poll_failed;
- /* the buffer is prepared, now fill in it with meaningful values */
- GST_LOG_OBJECT (pool, "doing DQBUF");
- if (v4l2_ioctl (pool->video_fd, VIDIOC_DQBUF, &vbuffer) < 0)
- goto error;
+ GST_LOG_OBJECT (pool, "dequeueing a buffer");
+
+ group = gst_v4l2_allocator_dqbuf (pool->vallocator);
+ if (group == NULL)
+ goto dqbuf_failed;
/* get our GstBuffer with that index from the pool, if the buffer was
* outstanding we have a serious problem.
*/
- outbuf = pool->buffers[vbuffer.index];
+ outbuf = pool->buffers[group->buffer.index];
if (outbuf == NULL)
goto no_buffer;
/* mark the buffer outstanding */
- pool->buffers[vbuffer.index] = NULL;
+ pool->buffers[group->buffer.index] = NULL;
pool->num_queued--;
- timestamp = GST_TIMEVAL_TO_TIME (vbuffer.timestamp);
-
- meta = GST_V4L2_META_GET (outbuf);
- g_assert (meta != NULL);
-
- /* The size can change at every frame, esp. with jpeg. The GstMemory
- * inside the GstBuffer could have been changed by some other
- * element. So update our meta */
- if (obj->type == V4L2_BUF_TYPE_VIDEO_CAPTURE
- || obj->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
-
- /* this field is common to MPLANE and not MPLANE */
- meta->vbuffer.length = vbuffer.length;
- meta->vbuffer.bytesused = vbuffer.bytesused;
-
- if (obj->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
- for (i = 0; i < meta->n_planes; i++) {
- /* the following also update meta->vbuffer.m.planes[i].length */
- meta->vplanes[i].length = vbuffer.m.planes[i].length;
- /* the following also update meta->vbuffer.m.planes[i].bytesused */
- meta->vplanes[i].bytesused = vbuffer.m.planes[i].bytesused;
- /* the following also update meta->vbuffer.m.planes[i].data_offset */
- meta->vplanes[i].data_offset = vbuffer.m.planes[i].data_offset;
- }
- } else {
- meta->vplanes[0].length = vbuffer.length;
- meta->vplanes[0].bytesused = vbuffer.bytesused;
- meta->vplanes[0].data_offset = 0;
- }
- }
+ timestamp = GST_TIMEVAL_TO_TIME (group->buffer.timestamp);
+
#ifndef GST_DISABLE_GST_DEBUG
- for (i = 0; i < meta->n_planes; i++) {
+ for (i = 0; i < group->n_mem; i++) {
GST_LOG_OBJECT (pool,
"dequeued buffer %p seq:%d (ix=%d), mem %p used %d, plane=%d, flags %08x, ts %"
GST_TIME_FORMAT ", pool-queued=%d, buffer=%p", outbuf,
- vbuffer.sequence, vbuffer.index, meta->mem[i],
- meta->vplanes[i].bytesused, i, vbuffer.flags,
+ group->buffer.sequence, group->buffer.index, group->mem[i],
+ group->planes[i].bytesused, i, group->buffer.flags,
GST_TIME_ARGS (timestamp), pool->num_queued, outbuf);
}
#endif
/* set top/bottom field first if v4l2_buffer has the information */
- if (vbuffer.field == V4L2_FIELD_INTERLACED_TB) {
+ if (group->buffer.field == V4L2_FIELD_INTERLACED_TB) {
GST_BUFFER_FLAG_SET (outbuf, GST_VIDEO_BUFFER_FLAG_INTERLACED);
GST_BUFFER_FLAG_SET (outbuf, GST_VIDEO_BUFFER_FLAG_TFF);
- } else if (vbuffer.field == V4L2_FIELD_INTERLACED_BT) {
+ } else if (group->buffer.field == V4L2_FIELD_INTERLACED_BT) {
GST_BUFFER_FLAG_SET (outbuf, GST_VIDEO_BUFFER_FLAG_INTERLACED);
GST_BUFFER_FLAG_UNSET (outbuf, GST_VIDEO_BUFFER_FLAG_TFF);
} else {
}
if (GST_VIDEO_INFO_FORMAT (&obj->info) == GST_VIDEO_FORMAT_ENCODED) {
- if (vbuffer.flags & V4L2_BUF_FLAG_KEYFRAME)
+ if (group->buffer.flags & V4L2_BUF_FLAG_KEYFRAME)
GST_BUFFER_FLAG_UNSET (outbuf, GST_BUFFER_FLAG_DELTA_UNIT);
else
GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DELTA_UNIT);
}
- /* The size can change at every frame, esp. with jpeg. The GstMemory
- * inside the GstBuffer could have been changed by some other
- * element, so just put back the original one. We always set it as
- * no share, so if it's not there, it's not used at all.
- */
- if (obj->type == V4L2_BUF_TYPE_VIDEO_CAPTURE
- || obj->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
- gst_buffer_remove_all_memory (outbuf);
- for (i = 0; i < meta->n_planes; i++) {
- gst_buffer_append_memory (outbuf,
- gst_memory_new_wrapped (GST_MEMORY_FLAG_NO_SHARE,
- meta->mem[i], meta->vplanes[i].length,
- meta->vplanes[i].data_offset,
- meta->vplanes[i].bytesused, NULL, NULL));
- }
- }
-
GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
*buffer = outbuf;
return GST_FLOW_OK;
/* ERRORS */
-poll_error:
+poll_failed:
{
GST_DEBUG_OBJECT (pool, "poll error %s", gst_flow_get_name (res));
return res;
}
-error:
+dqbuf_failed:
{
- GST_WARNING_OBJECT (pool,
- "problem dequeuing frame %d (ix=%d), pool-ct=%d, buf.flags=%d",
- vbuffer.sequence, vbuffer.index,
- GST_MINI_OBJECT_REFCOUNT (pool), vbuffer.flags);
-
- switch (errno) {
- case EAGAIN:
- GST_WARNING_OBJECT (pool,
- "Non-blocking I/O has been selected using O_NONBLOCK and"
- " no buffer was in the outgoing queue. device %s", obj->videodev);
- break;
- case EINVAL:
- GST_ERROR_OBJECT (pool,
- "The buffer type is not supported, or the index is out of bounds, "
- "or no buffers have been allocated yet, or the userptr "
- "or length are invalid. device %s", obj->videodev);
- break;
- case ENOMEM:
- GST_ERROR_OBJECT (pool,
- "insufficient memory to enqueue a user pointer buffer");
- break;
- case EIO:
- GST_INFO_OBJECT (pool,
- "VIDIOC_DQBUF failed due to an internal error."
- " Can also indicate temporary problems like signal loss."
- " Note the driver might dequeue an (empty) buffer despite"
- " returning an error, or even stop capturing."
- " device %s", obj->videodev);
- /* have we de-queued a buffer ? */
- if (!(vbuffer.flags & (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE))) {
- GST_DEBUG_OBJECT (pool, "reenqueing buffer");
- /* FIXME ... should we do something here? */
- }
- break;
- case EINTR:
- GST_WARNING_OBJECT (pool,
- "could not sync on a buffer on device %s", obj->videodev);
- break;
- default:
- GST_WARNING_OBJECT (pool,
- "Grabbing frame got interrupted on %s unexpectedly. %d: %s.",
- obj->videodev, errno, g_strerror (errno));
- break;
- }
return GST_FLOW_ERROR;
}
no_buffer:
{
GST_ERROR_OBJECT (pool, "No free buffer found in the pool at index %d.",
- vbuffer.index);
+ group->buffer.index);
return GST_FLOW_ERROR;
}
}
break;
case GST_V4L2_IO_DMABUF:
case GST_V4L2_IO_MMAP:
+ /* If this is being called to resurect a lost buffer */
+ if (params && params->flags & GST_V4L2_POOL_ACQUIRE_FLAG_RESURECT) {
+ ret = GST_BUFFER_POOL_CLASS (parent_class)->acquire_buffer (bpool,
+ buffer, params);
+ break;
+ }
+
/* just dequeue a buffer, we basically use the queue of v4l2 as the
* storage for our buffers. This function does poll first so we can
* interrupt it fine. */
if (pool->num_queued < pool->copy_threshold) {
GstBuffer *copy;
- if (pool->can_alloc) {
+ if (GST_V4L2_ALLOCATOR_CAN_ALLOCATE (pool->vallocator, MMAP)) {
if (GST_BUFFER_POOL_CLASS (parent_class)->acquire_buffer (bpool,
©, params) == GST_FLOW_OK) {
gst_v4l2_buffer_pool_release_buffer (bpool, copy);
break;
- } else {
- pool->can_alloc = FALSE;
}
}
case GST_V4L2_IO_DMABUF:
case GST_V4L2_IO_MMAP:
- /* queue back in the device */
- gst_v4l2_buffer_pool_qbuf (pool, buffer);
+ {
+ if (gst_v4l2_is_buffer_valid (buffer, NULL)) {
+ /* queue back in the device */
+ gst_v4l2_buffer_pool_qbuf (pool, buffer);
+ } else {
+ /* Simply release invalide/modified buffer, the allocator will
+ * give it back later */
+ GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_TAG_MEMORY);
+ GST_BUFFER_POOL_CLASS (parent_class)->release_buffer (bpool,
+ buffer);
+ }
break;
-
+ }
case GST_V4L2_IO_USERPTR:
default:
g_assert_not_reached ();
case GST_V4L2_IO_MMAP:
{
- GstV4l2Meta *meta;
+ GstV4l2MemoryGroup *group;
guint index;
- meta = GST_V4L2_META_GET (buffer);
- g_assert (meta != NULL);
+ if (!gst_v4l2_is_buffer_valid (buffer, &group)) {
+ /* Simply release invalide/modified buffer, the allocator will
+ * give it back later */
+ GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_TAG_MEMORY);
+ GST_BUFFER_POOL_CLASS (parent_class)->release_buffer (bpool,
+ buffer);
+ break;
+ }
- index = meta->vbuffer.index;
+ index = group->buffer.index;
if (pool->buffers[index] == NULL) {
GST_LOG_OBJECT (pool, "buffer %u not queued, putting on free list",
index);
- /* reset to the full length, in case it was changed */
- if (V4L2_TYPE_IS_MULTIPLANAR (obj->type)) {
- gint i = 0;
- gint total_length = 0;
- for (i = 0; i < meta->n_planes; i++)
- total_length += meta->vplanes[i].length;
-
- if (total_length != gst_buffer_get_size (buffer) &&
- obj->info.finfo->n_planes > 1) {
- /* FIXME if the lengths has actually changed it may require
- * to restore the sizes of the individual memories and
- * re-add them */
- GST_WARNING_OBJECT (pool,
- "lengths changed, more work required");
- }
-
- gst_buffer_resize (buffer, 0, total_length);
- } else {
- gst_buffer_resize (buffer, 0, meta->vbuffer.length);
- }
+ /* reset to default size */
+ gst_v4l2_allocator_reset_size (pool->vallocator, group);
/* playback, put the buffer back in the queue to refill later. */
GST_BUFFER_POOL_CLASS (parent_class)->release_buffer (bpool,
gst_v4l2_buffer_pool_finalize (GObject * object)
{
GstV4l2BufferPool *pool = GST_V4L2_BUFFER_POOL (object);
+ gint i;
- gst_v4l2_buffer_pool_free_buffers (pool);
+ for (i = 0; i < VIDEO_MAX_FRAME; i++) {
+ if (pool->buffers[i])
+ gst_buffer_replace (&(pool->buffers[i]), NULL);
+ }
if (pool->video_fd >= 0)
v4l2_close (pool->video_fd);
+ if (pool->vallocator)
+ gst_object_unref (pool->vallocator);
if (pool->allocator)
gst_object_unref (pool->allocator);
- g_free (pool->buffers);
+ /* FIXME Is this required to keep around ? */
gst_object_unref (pool->obj->element);
+ /* FIXME have we done enough here ? */
+
G_OBJECT_CLASS (parent_class)->finalize (object);
}
bufferpool_class->alloc_buffer = gst_v4l2_buffer_pool_alloc_buffer;
bufferpool_class->acquire_buffer = gst_v4l2_buffer_pool_acquire_buffer;
bufferpool_class->release_buffer = gst_v4l2_buffer_pool_release_buffer;
- bufferpool_class->free_buffer = gst_v4l2_buffer_pool_free_buffer;
}
/**
{
GstV4l2BufferPool *pool;
GstStructure *config;
+ gchar *name, *parent_name;
gboolean res = FALSE;
gint fd;
guint min, max;
if (fd < 0)
goto dup_failed;
- pool = (GstV4l2BufferPool *) g_object_new (GST_TYPE_V4L2_BUFFER_POOL, NULL);
+ /* setting a significant unique name */
+ parent_name = gst_object_get_name (GST_OBJECT (obj->element));
+ name = g_strconcat (parent_name, ":", "pool:",
+ V4L2_TYPE_IS_OUTPUT (obj->type) ? "sink" : "src", NULL);
+ g_free (parent_name);
+
+ pool = (GstV4l2BufferPool *) g_object_new (GST_TYPE_V4L2_BUFFER_POOL,
+ "name", name, NULL);
+ g_free (name);
+
pool->video_fd = fd;
pool->obj = obj;
- pool->can_alloc = FALSE;
min = max = 2;
- /* Check for CREATE_BUFS support */
+ pool->vallocator =
+ gst_v4l2_allocator_new (GST_OBJECT (pool), obj->video_fd, &obj->format);
+
switch (obj->mode) {
+ case GST_V4L2_IO_RW:
+ max = 0;
+ break;
case GST_V4L2_IO_MMAP:
case GST_V4L2_IO_DMABUF:
- {
- struct v4l2_create_buffers create_bufs = { 0 };
- create_bufs.count = 0;
- create_bufs.memory = V4L2_MEMORY_MMAP;
- create_bufs.format = obj->format;
- if (v4l2_ioctl (pool->video_fd, VIDIOC_CREATE_BUFS, &create_bufs) == 0) {
- pool->can_alloc = TRUE;
- max = 0;
- }
+ if (GST_V4L2_ALLOCATOR_CAN_ALLOCATE (pool->vallocator, MMAP))
+ max = VIDEO_MAX_FRAME;
+ break;
+ case GST_V4L2_IO_USERPTR:
+ if (GST_V4L2_ALLOCATOR_CAN_ALLOCATE (pool->vallocator, USERPTR))
+ max = VIDEO_MAX_FRAME;
break;
- }
default:
+ g_assert_not_reached ();
break;
}
GST_BUFFER_POOL_OPTION_VIDEO_META);
if (obj->need_crop_meta)
- gst_v4l2_buffer_pool_add_crop_meta (pool, obj->need_crop_meta);
+ pool->add_cropmeta = obj->need_crop_meta;
res = gst_buffer_pool_set_config (GST_BUFFER_POOL_CAST (pool), config);
if (!res)
/* ERRORS */
dup_failed:
{
- GST_DEBUG ("failed to dup fd %d (%s)", errno, g_strerror (errno));
+ GST_ERROR ("failed to dup fd %d (%s)", errno, g_strerror (errno));
return NULL;
}
config_failed:
to_queue = gst_buffer_ref (buf);
GST_LOG_OBJECT (pool, "processing buffer from our pool");
} else {
+ GstBufferPoolAcquireParams params = { 0 };
+
GST_LOG_OBJECT (pool, "alloc buffer from our pool");
- /* this can block if all buffers are outstanding which would be
- * strange because we would expect the upstream element to have
+ /* this can return EOS if all buffers are outstanding which would
+ * be strange because we would expect the upstream element to have
* allocated them and returned to us.. */
- ret = gst_buffer_pool_acquire_buffer (bpool, &to_queue, NULL);
+ params.flags = GST_BUFFER_POOL_ACQUIRE_FLAG_DONTWAIT;
+ ret = gst_buffer_pool_acquire_buffer (bpool, &to_queue, ¶ms);
if (ret != GST_FLOW_OK)
goto acquire_failed;
* Then release all buffers that are in pool->buffers array.
* Finally call STREAMON if CAPTURE type
* The caller is responsible to unset flushing on obj->pool
- *
+ *
* Returns: TRUE on success.
*/
gboolean
gst_v4l2_buffer_pool_flush (GstV4l2BufferPool * pool)
{
- GstBufferPool *bpool = GST_BUFFER_POOL_CAST (pool);
GstV4l2Object *obj = pool->obj;
- gint i = 0;
GST_DEBUG_OBJECT (pool, "flush");
stop_streaming (pool);
- switch (obj->type) {
- case V4L2_BUF_TYPE_VIDEO_CAPTURE:
- case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
- case V4L2_BUF_TYPE_VIDEO_OUTPUT:
- case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
- switch (obj->mode) {
- case GST_V4L2_IO_RW:
- break;
- case GST_V4L2_IO_MMAP:
- case GST_V4L2_IO_USERPTR:
- case GST_V4L2_IO_DMABUF:
- {
- for (i = 0; i < pool->num_buffers; i++) {
- GstBuffer *buf = pool->buffers[i];
- if (buf) {
- /* it's necessary to set to NULL before to call
- * gst_v4l2_buffer_pool_release_buffer
- * otherwise it won't go back to the pool */
- pool->buffers[i] = NULL;
-
- /* dicrease counter */
- pool->num_queued--;
-
- /* in CAPTURE mode the pool->num_queued will be re-incremented
- * because the buffers are queued when released */
- if (buf->pool)
- gst_buffer_unref (buf);
- else
- gst_v4l2_buffer_pool_release_buffer (bpool, buf);
- }
- }
-
- /* do not set pool->num_queued to 0 because
- * the buffers are queued when released */
- break;
- }
-
- default:
- g_assert_not_reached ();
- break;
- }
- break;
- default:
- g_assert_not_reached ();
- break;
- }
/* we can start capturing now, we wait for the playback
* case until we queued the first buffer */
if (!V4L2_TYPE_IS_OUTPUT (obj->type))
return FALSE;
}
}
-
-void
-gst_v4l2_buffer_pool_add_crop_meta (GstV4l2BufferPool * bpool, gboolean add)
-{
- bpool->add_cropmeta = add;
-}
projects / platform / upstream / gstreamer.git / commitdiff