gstreamer/gst-libs/gst/video/gstvideopool.c
Song Bing e9c6c833c9 videopool: update video alignment after applying
Video buffer pool will update video alignment to respect stride alignment
requirement. But haven't updated it to video alignment in configure.
Which will cause user get wrong video alignment.

Fixes https://bugzilla.gnome.org/show_bug.cgi?id=741501
2014-12-22 09:25:04 -05:00

292 lines
8.6 KiB
C

/* GStreamer
* Copyright (C) <2011> Wim Taymans <wim.taymans@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "gst/video/gstvideometa.h"
#include "gst/video/gstvideopool.h"
/**
* SECTION:gstvideopool
* @short_description: GstBufferPool for raw video buffers
* @see_also: #GstBufferPool
*
* Special GstBufferPool subclass for raw video buffers.
*
* Allows configuration of video-specific requirements such as
* stride alignments or pixel padding, and can also be configured
* to automatically add #GstVideoMeta to the buffers.
*/
/**
* gst_buffer_pool_config_set_video_alignment:
* @config: a #GstStructure
* @align: a #GstVideoAlignment
*
* Set the video alignment in @align to the bufferpool configuration
* @config
*/
void
gst_buffer_pool_config_set_video_alignment (GstStructure * config,
GstVideoAlignment * align)
{
g_return_if_fail (config != NULL);
g_return_if_fail (align != NULL);
gst_structure_set (config,
"padding-top", G_TYPE_UINT, align->padding_top,
"padding-bottom", G_TYPE_UINT, align->padding_bottom,
"padding-left", G_TYPE_UINT, align->padding_left,
"padding-right", G_TYPE_UINT, align->padding_right,
"stride-align0", G_TYPE_UINT, align->stride_align[0],
"stride-align1", G_TYPE_UINT, align->stride_align[1],
"stride-align2", G_TYPE_UINT, align->stride_align[2],
"stride-align3", G_TYPE_UINT, align->stride_align[3], NULL);
}
/**
* gst_buffer_pool_config_get_video_alignment:
* @config: a #GstStructure
* @align: a #GstVideoAlignment
*
* Get the video alignment from the bufferpool configuration @config in
* in @align
*
* Returns: #TRUE if @config could be parsed correctly.
*/
gboolean
gst_buffer_pool_config_get_video_alignment (GstStructure * config,
GstVideoAlignment * align)
{
g_return_val_if_fail (config != NULL, FALSE);
g_return_val_if_fail (align != NULL, FALSE);
return gst_structure_get (config,
"padding-top", G_TYPE_UINT, &align->padding_top,
"padding-bottom", G_TYPE_UINT, &align->padding_bottom,
"padding-left", G_TYPE_UINT, &align->padding_left,
"padding-right", G_TYPE_UINT, &align->padding_right,
"stride-align0", G_TYPE_UINT, &align->stride_align[0],
"stride-align1", G_TYPE_UINT, &align->stride_align[1],
"stride-align2", G_TYPE_UINT, &align->stride_align[2],
"stride-align3", G_TYPE_UINT, &align->stride_align[3], NULL);
}
/* bufferpool */
struct _GstVideoBufferPoolPrivate
{
GstCaps *caps;
GstVideoInfo info;
GstVideoAlignment video_align;
gboolean add_videometa;
gboolean need_alignment;
GstAllocator *allocator;
GstAllocationParams params;
};
static void gst_video_buffer_pool_finalize (GObject * object);
#define GST_VIDEO_BUFFER_POOL_GET_PRIVATE(obj) \
(G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_VIDEO_BUFFER_POOL, GstVideoBufferPoolPrivate))
#define gst_video_buffer_pool_parent_class parent_class
G_DEFINE_TYPE (GstVideoBufferPool, gst_video_buffer_pool, GST_TYPE_BUFFER_POOL);
static const gchar **
video_buffer_pool_get_options (GstBufferPool * pool)
{
static const gchar *options[] = { GST_BUFFER_POOL_OPTION_VIDEO_META,
GST_BUFFER_POOL_OPTION_VIDEO_ALIGNMENT, NULL
};
return options;
}
static gboolean
video_buffer_pool_set_config (GstBufferPool * pool, GstStructure * config)
{
GstVideoBufferPool *vpool = GST_VIDEO_BUFFER_POOL_CAST (pool);
GstVideoBufferPoolPrivate *priv = vpool->priv;
GstVideoInfo info;
GstCaps *caps;
guint size, min_buffers, max_buffers;
gint width, height;
GstAllocator *allocator;
GstAllocationParams params;
if (!gst_buffer_pool_config_get_params (config, &caps, &size, &min_buffers,
&max_buffers))
goto wrong_config;
if (caps == NULL)
goto no_caps;
/* now parse the caps from the config */
if (!gst_video_info_from_caps (&info, caps))
goto wrong_caps;
if (!gst_buffer_pool_config_get_allocator (config, &allocator, &params))
goto wrong_config;
width = info.width;
height = info.height;
GST_LOG_OBJECT (pool, "%dx%d, caps %" GST_PTR_FORMAT, width, height, caps);
if (priv->caps)
gst_caps_unref (priv->caps);
priv->caps = gst_caps_ref (caps);
priv->params = params;
if (priv->allocator)
gst_object_unref (priv->allocator);
if ((priv->allocator = allocator))
gst_object_ref (allocator);
/* enable metadata based on config of the pool */
priv->add_videometa =
gst_buffer_pool_config_has_option (config,
GST_BUFFER_POOL_OPTION_VIDEO_META);
/* parse extra alignment info */
priv->need_alignment = gst_buffer_pool_config_has_option (config,
GST_BUFFER_POOL_OPTION_VIDEO_ALIGNMENT);
if (priv->need_alignment && priv->add_videometa) {
/* get an apply the alignment to the info */
gst_buffer_pool_config_get_video_alignment (config, &priv->video_align);
gst_video_info_align (&info, &priv->video_align);
gst_buffer_pool_config_set_video_alignment (config, &priv->video_align);
}
priv->info = info;
gst_buffer_pool_config_set_params (config, caps, info.size, min_buffers,
max_buffers);
return GST_BUFFER_POOL_CLASS (parent_class)->set_config (pool, config);
/* ERRORS */
wrong_config:
{
GST_WARNING_OBJECT (pool, "invalid config");
return FALSE;
}
no_caps:
{
GST_WARNING_OBJECT (pool, "no caps in config");
return FALSE;
}
wrong_caps:
{
GST_WARNING_OBJECT (pool,
"failed getting geometry from caps %" GST_PTR_FORMAT, caps);
return FALSE;
}
}
static GstFlowReturn
video_buffer_pool_alloc (GstBufferPool * pool, GstBuffer ** buffer,
GstBufferPoolAcquireParams * params)
{
GstVideoBufferPool *vpool = GST_VIDEO_BUFFER_POOL_CAST (pool);
GstVideoBufferPoolPrivate *priv = vpool->priv;
GstVideoInfo *info;
info = &priv->info;
GST_DEBUG_OBJECT (pool, "alloc %" G_GSIZE_FORMAT, info->size);
*buffer =
gst_buffer_new_allocate (priv->allocator, info->size, &priv->params);
if (*buffer == NULL)
goto no_memory;
if (priv->add_videometa) {
GST_DEBUG_OBJECT (pool, "adding GstVideoMeta");
gst_buffer_add_video_meta_full (*buffer, GST_VIDEO_FRAME_FLAG_NONE,
GST_VIDEO_INFO_FORMAT (info),
GST_VIDEO_INFO_WIDTH (info), GST_VIDEO_INFO_HEIGHT (info),
GST_VIDEO_INFO_N_PLANES (info), info->offset, info->stride);
}
return GST_FLOW_OK;
/* ERROR */
no_memory:
{
GST_WARNING_OBJECT (pool, "can't create memory");
return GST_FLOW_ERROR;
}
}
/**
* gst_video_buffer_pool_new:
*
* Create a new bufferpool that can allocate video frames. This bufferpool
* supports all the video bufferpool options.
*
* Returns: (transfer floating): a new #GstBufferPool to allocate video frames
*/
GstBufferPool *
gst_video_buffer_pool_new ()
{
GstVideoBufferPool *pool;
pool = g_object_new (GST_TYPE_VIDEO_BUFFER_POOL, NULL);
GST_LOG_OBJECT (pool, "new video buffer pool %p", pool);
return GST_BUFFER_POOL_CAST (pool);
}
static void
gst_video_buffer_pool_class_init (GstVideoBufferPoolClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstBufferPoolClass *gstbufferpool_class = (GstBufferPoolClass *) klass;
g_type_class_add_private (klass, sizeof (GstVideoBufferPoolPrivate));
gobject_class->finalize = gst_video_buffer_pool_finalize;
gstbufferpool_class->get_options = video_buffer_pool_get_options;
gstbufferpool_class->set_config = video_buffer_pool_set_config;
gstbufferpool_class->alloc_buffer = video_buffer_pool_alloc;
}
static void
gst_video_buffer_pool_init (GstVideoBufferPool * pool)
{
pool->priv = GST_VIDEO_BUFFER_POOL_GET_PRIVATE (pool);
}
static void
gst_video_buffer_pool_finalize (GObject * object)
{
GstVideoBufferPool *pool = GST_VIDEO_BUFFER_POOL_CAST (object);
GstVideoBufferPoolPrivate *priv = pool->priv;
GST_LOG_OBJECT (pool, "finalize video buffer pool %p", pool);
if (priv->caps)
gst_caps_unref (priv->caps);
if (priv->allocator)
gst_object_unref (priv->allocator);
G_OBJECT_CLASS (gst_video_buffer_pool_parent_class)->finalize (object);
}