Commit 3cf85c90 authored by Nicolas Dufresne's avatar Nicolas Dufresne

v4l2: Move decide allocation into v4l2object

https://bugzilla.gnome.org/show_bug.cgi?id=720568
parent 34a8cb09
......@@ -3139,3 +3139,104 @@ gst_v4l2_object_get_caps (GstV4l2Object * v4l2object, GstCaps * filter)
return ret;
}
gboolean
gst_v4l2_object_decide_allocation (GstV4l2Object * obj, GstQuery * query)
{
GstBufferPool *pool;
guint size, min, max;
gboolean update;
GST_DEBUG_OBJECT (obj->element, "decide allocation");
g_return_val_if_fail (obj->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
obj->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE, FALSE);
if (gst_query_get_n_allocation_pools (query) > 0) {
gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max);
update = TRUE;
} else {
pool = NULL;
min = max = 0;
size = 0;
update = FALSE;
}
GST_DEBUG_OBJECT (obj->element, "allocation: size:%u min:%u max:%u pool:%"
GST_PTR_FORMAT, size, min, max, pool);
if (min != 0) {
/* if there is a min-buffers suggestion, use it. We add 1 because we need 1
* buffer extra to capture while the other two buffers are downstream */
min += 1;
} else {
min = 2;
}
/* select a pool */
switch (obj->mode) {
case GST_V4L2_IO_RW:
if (pool == NULL) {
/* no downstream pool, use our own then */
GST_DEBUG_OBJECT (obj->element,
"read/write mode: no downstream pool, using our own");
pool = GST_BUFFER_POOL_CAST (obj->pool);
size = obj->sizeimage;
} else {
/* in READ/WRITE mode, prefer a downstream pool because our own pool
* doesn't help much, we have to write to it as well */
GST_DEBUG_OBJECT (obj->element,
"read/write mode: using downstream pool");
/* use the bigest size, when we use our own pool we can't really do any
* other size than what the hardware gives us but for downstream pools
* we can try */
size = MAX (size, obj->sizeimage);
}
break;
case GST_V4L2_IO_MMAP:
case GST_V4L2_IO_USERPTR:
case GST_V4L2_IO_DMABUF:
/* in streaming mode, prefer our own pool */
pool = GST_BUFFER_POOL_CAST (obj->pool);
size = obj->sizeimage;
GST_DEBUG_OBJECT (obj->element,
"streaming mode: using our own pool %" GST_PTR_FORMAT, pool);
break;
case GST_V4L2_IO_AUTO:
default:
GST_WARNING_OBJECT (obj->element, "unhandled mode");
break;
}
if (pool) {
GstStructure *config;
GstCaps *caps;
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_get_params (config, &caps, NULL, NULL, NULL);
gst_buffer_pool_config_set_params (config, caps, size, min, max);
/* if downstream supports video metadata, add this to the pool config */
if (gst_query_find_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL)) {
GST_DEBUG_OBJECT (pool, "activate Video Meta");
gst_buffer_pool_config_add_option (config,
GST_BUFFER_POOL_OPTION_VIDEO_META);
}
gst_buffer_pool_set_config (pool, config);
}
if (update)
gst_query_set_nth_allocation_pool (query, 0, pool, size, min, max);
else
gst_query_add_allocation_pool (query, pool, size, min, max);
return TRUE;
pool_failed:
{
GST_ELEMENT_ERROR (obj->element, RESOURCE, SETTINGS,
(_("Video device could not create buffer pool.")), GST_ERROR_SYSTEM);
return FALSE;
}
}
......@@ -278,6 +278,8 @@ gboolean gst_v4l2_object_setup_format (GstV4l2Object * v4l2object,
GstVideoInfo * info,
GstVideoAlignment * align);
gboolean gst_v4l2_object_decide_allocation (GstV4l2Object * v4l2object,
GstQuery * query);
#define GST_IMPLEMENT_V4L2_PROBE_METHODS(Type_Class, interface_as_function) \
......
......@@ -464,94 +464,13 @@ gst_v4l2src_set_caps (GstBaseSrc * src, GstCaps * caps)
static gboolean
gst_v4l2src_decide_allocation (GstBaseSrc * bsrc, GstQuery * query)
{
GstV4l2Src *src;
GstV4l2Object *obj;
GstBufferPool *pool;
guint size, min, max;
gboolean update;
src = GST_V4L2SRC (bsrc);
obj = src->v4l2object;
if (gst_query_get_n_allocation_pools (query) > 0) {
gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max);
update = TRUE;
} else {
pool = NULL;
min = max = 0;
size = 0;
update = FALSE;
}
GST_DEBUG_OBJECT (src, "allocation: size:%u min:%u max:%u pool:%"
GST_PTR_FORMAT, size, min, max, pool);
GstV4l2Src *src = GST_V4L2SRC (bsrc);
gboolean ret = FALSE;
if (min != 0) {
/* if there is a min-buffers suggestion, use it. We add 1 because we need 1
* buffer extra to capture while the other two buffers are downstream */
min += 1;
} else {
min = 2;
}
if (gst_v4l2_object_decide_allocation (src->v4l2object, query))
ret = GST_BASE_SRC_CLASS (parent_class)->decide_allocation (bsrc, query);
/* select a pool */
switch (obj->mode) {
case GST_V4L2_IO_RW:
if (pool == NULL) {
/* no downstream pool, use our own then */
GST_DEBUG_OBJECT (src,
"read/write mode: no downstream pool, using our own");
pool = GST_BUFFER_POOL_CAST (obj->pool);
size = obj->sizeimage;
} else {
/* in READ/WRITE mode, prefer a downstream pool because our own pool
* doesn't help much, we have to write to it as well */
GST_DEBUG_OBJECT (src, "read/write mode: using downstream pool");
/* use the bigest size, when we use our own pool we can't really do any
* other size than what the hardware gives us but for downstream pools
* we can try */
size = MAX (size, obj->sizeimage);
}
break;
case GST_V4L2_IO_MMAP:
case GST_V4L2_IO_USERPTR:
case GST_V4L2_IO_DMABUF:
/* in streaming mode, prefer our own pool */
pool = GST_BUFFER_POOL_CAST (obj->pool);
size = obj->sizeimage;
GST_DEBUG_OBJECT (src,
"streaming mode: using our own pool %" GST_PTR_FORMAT, pool);
break;
case GST_V4L2_IO_AUTO:
default:
GST_WARNING_OBJECT (src, "unhandled mode");
break;
}
if (pool) {
GstStructure *config;
GstCaps *caps;
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_get_params (config, &caps, NULL, NULL, NULL);
gst_buffer_pool_config_set_params (config, caps, size, min, max);
/* if downstream supports video metadata, add this to the pool config */
if (gst_query_find_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL)) {
GST_DEBUG_OBJECT (pool, "activate Video Meta");
gst_buffer_pool_config_add_option (config,
GST_BUFFER_POOL_OPTION_VIDEO_META);
}
gst_buffer_pool_set_config (pool, config);
}
if (update)
gst_query_set_nth_allocation_pool (query, 0, pool, size, min, max);
else
gst_query_add_allocation_pool (query, pool, size, min, max);
return GST_BASE_SRC_CLASS (parent_class)->decide_allocation (bsrc, query);
return ret;
}
static gboolean
......
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