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v4l2bufferpool: Do not pre-configure the pool

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Pre-configuring the pool is error prone, since it may hide a configuration failure and
endup with a pool that is not configured the way it should (e.g. no video meta, wrong
queue size, etc.)
This commit is contained in:
Nicolas Dufresne 2014-04-15 13:30:02 -04:00
parent fa6cd1d25a
commit cf6c7e9846
1 changed files with 5 additions and 40 deletions
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45
sys/v4l2/gstv4l2bufferpool.c
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@ -1037,9 +1037,7 @@ gst_v4l2_buffer_pool_new (GstV4l2Object * obj, GstCaps * caps)
GstV4l2BufferPool *pool;
GstStructure *config;
gchar *name, *parent_name;
gboolean res = FALSE;
gint fd;
guint min, max;
fd = v4l2_dup (obj->video_fd);
if (fd < 0)
@ -1057,45 +1055,17 @@ gst_v4l2_buffer_pool_new (GstV4l2Object * obj, GstCaps * caps)
pool->video_fd = fd;
pool->obj = obj;
min = max = 2;
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:
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_object_ref (obj->element);
config = gst_buffer_pool_get_config (GST_BUFFER_POOL_CAST (pool));
gst_buffer_pool_config_set_params (config, caps, obj->sizeimage, min, max);
/* Ensure our internal pool has required features */
if (obj->need_video_meta)
gst_buffer_pool_config_add_option (config,
GST_BUFFER_POOL_OPTION_VIDEO_META);
if (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)
goto config_failed;
gst_object_ref (obj->element);
gst_buffer_pool_config_set_params (config, caps, obj->sizeimage, 0, 0);
/* This will simply set a default config, but will not configure the pool
* because min and max are not valid */
gst_buffer_pool_set_config (GST_BUFFER_POOL_CAST (pool), config);
return GST_BUFFER_POOL (pool);
@ -1105,11 +1075,6 @@ dup_failed:
GST_ERROR ("failed to dup fd %d (%s)", errno, g_strerror (errno));
return NULL;
}
config_failed:
{
GST_WARNING ("failed to set pool config");
return NULL;
}
}
static GstFlowReturn