gstreamer/sys/xvimage/xvimagepool.c

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/* GStreamer
* Copyright (C) <2005> Julien Moutte <julien@moutte.net>
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
/* Object header */
#include "xvimagepool.h"
#include "xvimageallocator.h"
/* Debugging category */
#include <gst/gstinfo.h>
/* Helper functions */
#include <gst/video/video.h>
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#include <gst/video/gstvideometa.h>
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#include <gst/video/gstvideopool.h>
GST_DEBUG_CATEGORY_EXTERN (gst_debug_xvimagepool);
#define GST_CAT_DEFAULT gst_debug_xvimagepool
struct _GstXvImageBufferPoolPrivate
{
GstXvImageAllocator *allocator;
GstCaps *caps;
gint im_format;
GstVideoRectangle crop;
GstVideoInfo info;
GstVideoAlignment align;
guint padded_width;
guint padded_height;
gboolean add_metavideo;
gboolean need_alignment;
};
/* bufferpool */
static void gst_xvimage_buffer_pool_finalize (GObject * object);
#define GST_XVIMAGE_BUFFER_POOL_GET_PRIVATE(obj) \
(G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_XVIMAGE_BUFFER_POOL, GstXvImageBufferPoolPrivate))
#define gst_xvimage_buffer_pool_parent_class parent_class
G_DEFINE_TYPE (GstXvImageBufferPool, gst_xvimage_buffer_pool,
GST_TYPE_BUFFER_POOL);
static const gchar **
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xvimage_buffer_pool_get_options (GstBufferPool * pool)
{
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static const gchar *options[] = { GST_BUFFER_POOL_OPTION_VIDEO_META,
GST_BUFFER_POOL_OPTION_VIDEO_ALIGNMENT, NULL
};
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return options;
}
static gboolean
xvimage_buffer_pool_set_config (GstBufferPool * pool, GstStructure * config)
{
GstXvImageBufferPool *xvpool = GST_XVIMAGE_BUFFER_POOL_CAST (pool);
GstXvImageBufferPoolPrivate *priv = xvpool->priv;
GstVideoInfo info;
GstCaps *caps;
GstXvContext *context;
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if (!gst_buffer_pool_config_get_params (config, &caps, NULL, NULL, NULL))
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;
GST_LOG_OBJECT (pool, "%dx%d, caps %" GST_PTR_FORMAT, info.width, info.height,
caps);
context = gst_xvimage_allocator_peek_context (priv->allocator);
priv->im_format = gst_xvcontext_get_format_from_info (context, &info);
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if (priv->im_format == -1)
goto unknown_format;
if (priv->caps)
gst_caps_unref (priv->caps);
priv->caps = gst_caps_ref (caps);
/* enable metadata based on config of the pool */
priv->add_metavideo =
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gst_buffer_pool_config_has_option (config,
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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) {
gst_buffer_pool_config_get_video_alignment (config, &priv->align);
GST_LOG_OBJECT (pool, "padding %u-%ux%u-%u", priv->align.padding_top,
priv->align.padding_left, priv->align.padding_left,
priv->align.padding_bottom);
/* do padding and alignment */
gst_video_info_align (&info, &priv->align);
/* we need the video metadata too now */
priv->add_metavideo = TRUE;
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} else {
gst_video_alignment_reset (&priv->align);
}
/* add the padding */
priv->padded_width =
GST_VIDEO_INFO_WIDTH (&info) + priv->align.padding_left +
priv->align.padding_right;
priv->padded_height =
GST_VIDEO_INFO_HEIGHT (&info) + priv->align.padding_top +
priv->align.padding_bottom;
priv->info = info;
priv->crop.x = priv->align.padding_left;
priv->crop.y = priv->align.padding_top;
priv->crop.w = priv->info.width;
priv->crop.h = priv->info.height;
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;
}
unknown_format:
{
GST_WARNING_OBJECT (pool, "failed to get format from caps %"
GST_PTR_FORMAT, caps);
return FALSE;;
}
}
/* This function handles GstXImageBuffer creation depending on XShm availability */
static GstFlowReturn
xvimage_buffer_pool_alloc (GstBufferPool * pool, GstBuffer ** buffer,
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GstBufferPoolAcquireParams * params)
{
GstXvImageBufferPool *xvpool = GST_XVIMAGE_BUFFER_POOL_CAST (pool);
GstXvImageBufferPoolPrivate *priv = xvpool->priv;
GstVideoInfo *info;
GstBuffer *xvimage;
GstMemory *mem;
info = &priv->info;
xvimage = gst_buffer_new ();
mem = gst_xvimage_allocator_alloc (priv->allocator, priv->im_format,
priv->padded_width, priv->padded_height, &priv->crop, NULL);
if (mem == NULL) {
gst_buffer_unref (xvimage);
goto no_buffer;
}
gst_buffer_append_memory (xvimage, mem);
if (priv->add_metavideo) {
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GST_DEBUG_OBJECT (pool, "adding GstVideoMeta");
gst_buffer_add_video_meta_full (xvimage, 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);
}
*buffer = xvimage;
return GST_FLOW_OK;
/* ERROR */
no_buffer:
{
GST_WARNING_OBJECT (pool, "can't create image");
return GST_FLOW_ERROR;
}
}
GstBufferPool *
gst_xvimage_buffer_pool_new (GstXvImageAllocator * allocator)
{
GstXvImageBufferPool *pool;
pool = g_object_new (GST_TYPE_XVIMAGE_BUFFER_POOL, NULL);
pool->priv->allocator = gst_object_ref (allocator);
GST_LOG_OBJECT (pool, "new XvImage buffer pool %p", pool);
return GST_BUFFER_POOL_CAST (pool);
}
static void
gst_xvimage_buffer_pool_class_init (GstXvImageBufferPoolClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstBufferPoolClass *gstbufferpool_class = (GstBufferPoolClass *) klass;
g_type_class_add_private (klass, sizeof (GstXvImageBufferPoolPrivate));
gobject_class->finalize = gst_xvimage_buffer_pool_finalize;
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gstbufferpool_class->get_options = xvimage_buffer_pool_get_options;
gstbufferpool_class->set_config = xvimage_buffer_pool_set_config;
gstbufferpool_class->alloc_buffer = xvimage_buffer_pool_alloc;
}
static void
gst_xvimage_buffer_pool_init (GstXvImageBufferPool * pool)
{
pool->priv = GST_XVIMAGE_BUFFER_POOL_GET_PRIVATE (pool);
}
static void
gst_xvimage_buffer_pool_finalize (GObject * object)
{
GstXvImageBufferPool *pool = GST_XVIMAGE_BUFFER_POOL_CAST (object);
GstXvImageBufferPoolPrivate *priv = pool->priv;
GST_LOG_OBJECT (pool, "finalize XvImage buffer pool %p", pool);
if (priv->caps)
gst_caps_unref (priv->caps);
if (priv->allocator)
gst_object_unref (priv->allocator);
G_OBJECT_CLASS (gst_xvimage_buffer_pool_parent_class)->finalize (object);
}