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