gstreamer/subprojects/gst-plugins-bad/sys/va/gstvabasetransform.c

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/* GStreamer
* Copyright (C) 2021 Igalia, S.L.
* Author: Víctor Jáquez <vjaquez@igalia.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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstvabasetransform.h"
#include "gstvaallocator.h"
#include "gstvacaps.h"
#include "gstvapool.h"
#include "gstvautils.h"
#define GST_CAT_DEFAULT gst_va_base_transform_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
struct _GstVaBaseTransformPrivate
{
GstVideoInfo srcpad_info;
GstBufferPool *other_pool;
GstCaps *sinkpad_caps;
GstVideoInfo sinkpad_info;
GstBufferPool *sinkpad_pool;
};
/**
* GstVaBaseTransform:
*
* A base class implementation for VA-API filters.
*
* Since: 1.20
*/
#define gst_va_base_transform_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstVaBaseTransform, gst_va_base_transform,
GST_TYPE_BASE_TRANSFORM, G_ADD_PRIVATE (GstVaBaseTransform)
GST_DEBUG_CATEGORY_INIT (gst_va_base_transform_debug,
"vabasetransform", 0, "vabasetransform element");
);
extern GRecMutex GST_VA_SHARED_LOCK;
static void
gst_va_base_transform_dispose (GObject * object)
{
GstVaBaseTransform *self = GST_VA_BASE_TRANSFORM (object);
if (self->priv->other_pool) {
gst_buffer_pool_set_active (self->priv->other_pool, FALSE);
gst_clear_object (&self->priv->other_pool);
}
gst_clear_caps (&self->out_caps);
gst_clear_caps (&self->in_caps);
gst_clear_object (&self->filter);
gst_clear_object (&self->display);
if (self->priv->sinkpad_pool) {
gst_buffer_pool_set_active (self->priv->sinkpad_pool, FALSE);
gst_clear_object (&self->priv->sinkpad_pool);
}
gst_clear_caps (&self->priv->sinkpad_caps);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_va_base_transform_init (GstVaBaseTransform * self)
{
gst_base_transform_set_qos_enabled (GST_BASE_TRANSFORM (self), TRUE);
self->priv = gst_va_base_transform_get_instance_private (self);
}
static gboolean
gst_va_base_transform_query (GstBaseTransform * trans,
GstPadDirection direction, GstQuery * query)
{
GstVaBaseTransform *self = GST_VA_BASE_TRANSFORM (trans);
gboolean ret = FALSE;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_CONTEXT:
{
GstVaDisplay *display = NULL;
gst_object_replace ((GstObject **) & display,
(GstObject *) self->display);
ret = gst_va_handle_context_query (GST_ELEMENT_CAST (self), query,
display);
gst_clear_object (&display);
break;
}
default:
ret = GST_BASE_TRANSFORM_CLASS (parent_class)->query (trans, direction,
query);
break;
}
return ret;
}
static gboolean
gst_va_base_transform_set_caps (GstBaseTransform * trans, GstCaps * incaps,
GstCaps * outcaps)
{
GstVaBaseTransform *self = GST_VA_BASE_TRANSFORM (trans);
GstVaBaseTransformClass *fclass;
GstVideoInfo in_info, out_info;
gboolean res;
/* input caps */
if (!gst_video_info_from_caps (&in_info, incaps))
goto invalid_caps;
/* output caps */
if (!gst_video_info_from_caps (&out_info, outcaps))
goto invalid_caps;
fclass = GST_VA_BASE_TRANSFORM_GET_CLASS (self);
if (fclass->set_info)
res = fclass->set_info (self, incaps, &in_info, outcaps, &out_info);
else
res = TRUE;
self->negotiated = res;
if (res) {
gst_caps_replace (&self->in_caps, incaps);
gst_caps_replace (&self->out_caps, outcaps);
self->in_info = in_info;
self->out_info = out_info;
}
if (self->priv->sinkpad_pool) {
gst_buffer_pool_set_active (self->priv->sinkpad_pool, FALSE);
gst_clear_object (&self->priv->sinkpad_pool);
}
if (self->priv->other_pool) {
gst_buffer_pool_set_active (self->priv->other_pool, FALSE);
gst_clear_object (&self->priv->other_pool);
}
return res;
/* ERRORS */
invalid_caps:
{
GST_ERROR_OBJECT (self, "invalid caps");
self->negotiated = FALSE;
return FALSE;
}
}
/* Answer upstream allocation query. */
static gboolean
gst_va_base_transform_propose_allocation (GstBaseTransform * trans,
GstQuery * decide_query, GstQuery * query)
{
GstVaBaseTransform *self = GST_VA_BASE_TRANSFORM (trans);
GstAllocator *allocator = NULL;
GstAllocationParams params = { 0, };
GstBufferPool *pool;
GstCaps *caps;
GstVideoInfo info;
gboolean update_allocator = FALSE;
guint size, usage_hint = VA_SURFACE_ATTRIB_USAGE_HINT_GENERIC; /* it migth be
* used by a va
* decoder */
gst_clear_caps (&self->priv->sinkpad_caps);
if (!GST_BASE_TRANSFORM_CLASS (parent_class)->propose_allocation (trans,
decide_query, query))
return FALSE;
/* passthrough, we're done */
if (!decide_query)
return TRUE;
if (gst_query_get_n_allocation_pools (query) > 0)
return TRUE;
gst_query_parse_allocation (query, &caps, NULL);
if (!caps)
return FALSE;
if (!gst_video_info_from_caps (&info, caps)) {
GST_ERROR_OBJECT (self, "Cannot parse caps %" GST_PTR_FORMAT, caps);
return FALSE;
}
size = GST_VIDEO_INFO_SIZE (&info);
if (gst_query_get_n_allocation_params (query) > 0) {
gst_query_parse_nth_allocation_param (query, 0, &allocator, &params);
if (!GST_IS_VA_DMABUF_ALLOCATOR (allocator)
&& !GST_IS_VA_ALLOCATOR (allocator))
gst_clear_object (&allocator);
update_allocator = TRUE;
} else {
gst_allocation_params_init (&params);
}
if (!allocator) {
if (!(allocator = gst_va_base_transform_allocator_from_caps (self, caps)))
return FALSE;
}
pool = gst_va_pool_new_with_config (caps, size, 1 + self->extra_min_buffers,
0, usage_hint, allocator, &params);
if (!pool) {
gst_object_unref (allocator);
goto config_failed;
}
if (update_allocator)
gst_query_set_nth_allocation_param (query, 0, allocator, &params);
else
gst_query_add_allocation_param (query, allocator, &params);
gst_query_add_allocation_pool (query, pool, size, 1 + self->extra_min_buffers,
0);
GST_DEBUG_OBJECT (self,
"proposing %" GST_PTR_FORMAT " with allocator %" GST_PTR_FORMAT,
pool, allocator);
gst_object_unref (allocator);
gst_object_unref (pool);
gst_query_add_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL);
self->priv->sinkpad_caps = gst_caps_ref (caps);
return TRUE;
/* ERRORS */
config_failed:
{
GST_ERROR_OBJECT (self, "failed to set config");
return FALSE;
}
}
static GstBufferPool *
_create_other_pool (GstAllocator * allocator,
GstAllocationParams * params, GstCaps * caps, guint size)
{
GstBufferPool *pool = NULL;
GstStructure *config;
pool = gst_video_buffer_pool_new ();
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_set_params (config, caps, size, 0, 0);
gst_buffer_pool_config_set_allocator (config, allocator, params);
if (!gst_buffer_pool_set_config (pool, config)) {
gst_clear_object (&pool);
}
return pool;
}
/* configure the allocation query that was answered downstream, we can
* configure some properties on it. Only it's called when not in
* passthrough mode. */
static gboolean
gst_va_base_transform_decide_allocation (GstBaseTransform * trans,
GstQuery * query)
{
GstVaBaseTransform *self = GST_VA_BASE_TRANSFORM (trans);
GstAllocator *allocator = NULL, *other_allocator = NULL;
GstAllocationParams params, other_params;
GstBufferPool *pool = NULL, *other_pool = NULL;
GstCaps *outcaps = NULL;
GstStructure *config;
GstVideoInfo vinfo;
guint min, max, size = 0, usage_hint = VA_SURFACE_ATTRIB_USAGE_HINT_VPP_WRITE;
gboolean update_pool, update_allocator, has_videometa, copy_frames;
gst_query_parse_allocation (query, &outcaps, NULL);
gst_allocation_params_init (&other_params);
gst_allocation_params_init (&params);
if (!gst_video_info_from_caps (&vinfo, outcaps)) {
GST_ERROR_OBJECT (self, "Cannot parse caps %" GST_PTR_FORMAT, outcaps);
return FALSE;
}
if (gst_query_get_n_allocation_params (query) > 0) {
gst_query_parse_nth_allocation_param (query, 0, &allocator, &other_params);
if (allocator && !(GST_IS_VA_DMABUF_ALLOCATOR (allocator)
|| GST_IS_VA_ALLOCATOR (allocator))) {
/* save the allocator for the other pool */
other_allocator = allocator;
allocator = NULL;
}
update_allocator = TRUE;
} else {
update_allocator = FALSE;
}
if (gst_query_get_n_allocation_pools (query) > 0) {
gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max);
if (pool) {
if (!GST_IS_VA_POOL (pool)) {
GST_DEBUG_OBJECT (self,
"may need other pool for copy frames %" GST_PTR_FORMAT, pool);
other_pool = pool;
pool = NULL;
}
}
update_pool = TRUE;
} else {
size = GST_VIDEO_INFO_SIZE (&vinfo);
min = 1;
max = 0;
update_pool = FALSE;
}
if (!allocator) {
/* XXX(victor): USAGE_HINT_VPP_WRITE creates tiled dmabuf frames
* in iHD */
if (gst_caps_is_dmabuf (outcaps) && GST_VIDEO_INFO_IS_RGB (&vinfo))
usage_hint = VA_SURFACE_ATTRIB_USAGE_HINT_GENERIC;
if (!(allocator =
gst_va_base_transform_allocator_from_caps (self, outcaps)))
return FALSE;
}
if (!pool)
pool = gst_va_pool_new ();
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_set_allocator (config, allocator, &params);
gst_buffer_pool_config_add_option (config, GST_BUFFER_POOL_OPTION_VIDEO_META);
gst_buffer_pool_config_set_params (config, outcaps, size, min, max);
gst_buffer_pool_config_set_va_allocation_params (config, usage_hint);
if (!gst_buffer_pool_set_config (pool, config)) {
gst_object_unref (allocator);
gst_object_unref (pool);
return FALSE;
}
if (GST_IS_VA_DMABUF_ALLOCATOR (allocator)) {
gst_va_dmabuf_allocator_get_format (allocator, &self->priv->srcpad_info,
NULL);
} else if (GST_IS_VA_ALLOCATOR (allocator)) {
gst_va_allocator_get_format (allocator, &self->priv->srcpad_info, NULL);
}
if (update_allocator)
gst_query_set_nth_allocation_param (query, 0, allocator, &params);
else
gst_query_add_allocation_param (query, allocator, &params);
if (update_pool)
gst_query_set_nth_allocation_pool (query, 0, pool, size, min, max);
else
gst_query_add_allocation_pool (query, pool, size, min, max);
has_videometa = gst_query_find_allocation_meta (query,
GST_VIDEO_META_API_TYPE, NULL);
copy_frames = (!has_videometa && gst_va_pool_requires_video_meta (pool)
&& gst_caps_is_raw (outcaps));
if (copy_frames) {
if (other_pool) {
gst_object_replace ((GstObject **) & self->priv->other_pool,
(GstObject *) other_pool);
} else {
self->priv->other_pool =
_create_other_pool (other_allocator, &other_params, outcaps, size);
}
GST_DEBUG_OBJECT (self, "Use the other pool for copy %" GST_PTR_FORMAT,
self->priv->other_pool);
} else {
gst_clear_object (&self->priv->other_pool);
}
GST_DEBUG_OBJECT (self,
"decided pool %" GST_PTR_FORMAT " with allocator %" GST_PTR_FORMAT,
pool, allocator);
gst_object_unref (allocator);
gst_object_unref (pool);
gst_clear_object (&other_allocator);
gst_clear_object (&other_pool);
/* removes allocation metas */
return GST_BASE_TRANSFORM_CLASS (parent_class)->decide_allocation (trans,
query);
}
/* output buffers must be from our VA-based pool, they cannot be
* system-allocated */
static gboolean
gst_va_base_transform_transform_size (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * caps, gsize size,
GstCaps * othercaps, gsize * othersize)
{
return FALSE;
}
static GstFlowReturn
gst_va_base_transform_generate_output (GstBaseTransform * trans,
GstBuffer ** outbuf)
{
GstVaBaseTransform *self = GST_VA_BASE_TRANSFORM (trans);
GstVideoFrame src_frame;
GstVideoFrame dest_frame;
GstBuffer *buffer = NULL;
GstFlowReturn ret;
ret = GST_BASE_TRANSFORM_CLASS (parent_class)->generate_output (trans,
outbuf);
if (ret != GST_FLOW_OK || *outbuf == NULL)
return ret;
if (!self->priv->other_pool)
return GST_FLOW_OK;
/* Now need to copy the output buffer */
ret = GST_FLOW_ERROR;
if (!gst_buffer_pool_set_active (self->priv->other_pool, TRUE)) {
GST_WARNING_OBJECT (self, "failed to active the other pool %"
GST_PTR_FORMAT, self->priv->other_pool);
goto out;
}
ret = gst_buffer_pool_acquire_buffer (self->priv->other_pool, &buffer, NULL);
if (ret != GST_FLOW_OK)
goto out;
if (!gst_video_frame_map (&src_frame, &self->priv->srcpad_info, *outbuf,
GST_MAP_READ))
goto out;
if (!gst_video_frame_map (&dest_frame, &self->out_info, buffer,
GST_MAP_WRITE)) {
gst_video_frame_unmap (&src_frame);
goto out;
}
if (!gst_video_frame_copy (&dest_frame, &src_frame)) {
gst_video_frame_unmap (&src_frame);
gst_video_frame_unmap (&dest_frame);
goto out;
}
gst_video_frame_unmap (&src_frame);
gst_video_frame_unmap (&dest_frame);
gst_buffer_replace (outbuf, buffer);
ret = GST_FLOW_OK;
out:
gst_clear_buffer (&buffer);
return ret;
}
static GstStateChangeReturn
gst_va_base_transform_change_state (GstElement * element,
GstStateChange transition)
{
GstVaBaseTransform *self = GST_VA_BASE_TRANSFORM (element);
GstVaBaseTransformClass *klass = GST_VA_BASE_TRANSFORM_GET_CLASS (element);
GstStateChangeReturn ret;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
if (!gst_va_ensure_element_data (element, klass->render_device_path,
&self->display))
goto open_failed;
gst_clear_object (&self->filter);
self->filter = gst_va_filter_new (self->display);
if (!gst_va_filter_open (self->filter))
goto open_failed;
if (klass->update_properties)
klass->update_properties (self);
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_va_filter_close (self->filter);
break;
case GST_STATE_CHANGE_READY_TO_NULL:
gst_clear_object (&self->filter);
gst_clear_object (&self->display);
break;
default:
break;
}
return ret;
/* Errors */
open_failed:
{
GST_ELEMENT_ERROR (self, LIBRARY, INIT, (NULL), ("Failed to open VPP"));
return GST_STATE_CHANGE_FAILURE;
}
}
static void
gst_va_base_transform_set_context (GstElement * element, GstContext * context)
{
GstVaDisplay *old_display, *new_display;
GstVaBaseTransform *self = GST_VA_BASE_TRANSFORM (element);
GstVaBaseTransformClass *klass = GST_VA_BASE_TRANSFORM_GET_CLASS (self);
gboolean ret;
old_display = self->display ? gst_object_ref (self->display) : NULL;
ret = gst_va_handle_set_context (element, context, klass->render_device_path,
&self->display);
new_display = self->display ? gst_object_ref (self->display) : NULL;
if (!ret
|| (old_display && new_display && old_display != new_display
&& self->filter)) {
GST_ELEMENT_WARNING (element, RESOURCE, BUSY,
("Can't replace VA display while operating"), (NULL));
}
gst_clear_object (&old_display);
gst_clear_object (&new_display);
GST_ELEMENT_CLASS (parent_class)->set_context (element, context);
}
static void
gst_va_base_transform_class_init (GstVaBaseTransformClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *element_class;
GstBaseTransformClass *trans_class;
gobject_class = G_OBJECT_CLASS (klass);
element_class = GST_ELEMENT_CLASS (klass);
trans_class = GST_BASE_TRANSFORM_CLASS (klass);
gobject_class->dispose = gst_va_base_transform_dispose;
trans_class->query = GST_DEBUG_FUNCPTR (gst_va_base_transform_query);
trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_va_base_transform_set_caps);
trans_class->propose_allocation =
GST_DEBUG_FUNCPTR (gst_va_base_transform_propose_allocation);
trans_class->decide_allocation =
GST_DEBUG_FUNCPTR (gst_va_base_transform_decide_allocation);
trans_class->transform_size =
GST_DEBUG_FUNCPTR (gst_va_base_transform_transform_size);
trans_class->generate_output =
GST_DEBUG_FUNCPTR (gst_va_base_transform_generate_output);
element_class->set_context =
GST_DEBUG_FUNCPTR (gst_va_base_transform_set_context);
element_class->change_state =
GST_DEBUG_FUNCPTR (gst_va_base_transform_change_state);
gst_type_mark_as_plugin_api (GST_TYPE_VA_BASE_TRANSFORM, 0);
}
GstAllocator *
gst_va_base_transform_allocator_from_caps (GstVaBaseTransform * self,
GstCaps * caps)
{
GstAllocator *allocator = NULL;
if (gst_caps_is_dmabuf (caps)) {
allocator = gst_va_dmabuf_allocator_new (self->display);
} else {
GArray *surface_formats = gst_va_filter_get_surface_formats (self->filter);
allocator = gst_va_allocator_new (self->display, surface_formats);
}
return allocator;
}
static inline gsize
_get_plane_data_size (GstVideoInfo * info, guint plane)
{
gint height, padded_height;
height = GST_VIDEO_INFO_HEIGHT (info);
padded_height =
GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (info->finfo, plane, height);
return GST_VIDEO_INFO_PLANE_STRIDE (info, plane) * padded_height;
}
static gboolean
_try_import_dmabuf_unlocked (GstVaBaseTransform * self, GstBuffer * inbuf)
{
GstVaBaseTransform *btrans = GST_VA_BASE_TRANSFORM (self);
GstVideoMeta *meta;
GstVideoInfo in_info = btrans->in_info;
GstMemory *mems[GST_VIDEO_MAX_PLANES];
guint i, n_mem, n_planes;
gsize offset[GST_VIDEO_MAX_PLANES];
uintptr_t fd[GST_VIDEO_MAX_PLANES];
n_planes = GST_VIDEO_INFO_N_PLANES (&in_info);
n_mem = gst_buffer_n_memory (inbuf);
meta = gst_buffer_get_video_meta (inbuf);
/* This will eliminate most non-dmabuf out there */
if (!gst_is_dmabuf_memory (gst_buffer_peek_memory (inbuf, 0)))
return FALSE;
/* We cannot have multiple dmabuf per plane */
if (n_mem > n_planes)
return FALSE;
/* Update video info based on video meta */
if (meta) {
GST_VIDEO_INFO_WIDTH (&in_info) = meta->width;
GST_VIDEO_INFO_HEIGHT (&in_info) = meta->height;
for (i = 0; i < meta->n_planes; i++) {
GST_VIDEO_INFO_PLANE_OFFSET (&in_info, i) = meta->offset[i];
GST_VIDEO_INFO_PLANE_STRIDE (&in_info, i) = meta->stride[i];
}
}
/* Find and validate all memories */
for (i = 0; i < n_planes; i++) {
guint plane_size;
guint length;
guint mem_idx;
gsize mem_skip;
plane_size = _get_plane_data_size (&in_info, i);
if (!gst_buffer_find_memory (inbuf, in_info.offset[i], plane_size,
&mem_idx, &length, &mem_skip))
return FALSE;
/* We can't have more then one dmabuf per plane */
if (length != 1)
return FALSE;
mems[i] = gst_buffer_peek_memory (inbuf, mem_idx);
/* And all memory found must be dmabuf */
if (!gst_is_dmabuf_memory (mems[i]))
return FALSE;
offset[i] = mems[i]->offset + mem_skip;
fd[i] = gst_dmabuf_memory_get_fd (mems[i]);
}
/* Now create a VASurfaceID for the buffer */
return gst_va_dmabuf_memories_setup (btrans->display, &in_info, n_planes,
mems, fd, offset, VA_SURFACE_ATTRIB_USAGE_HINT_VPP_READ);
}
static GstBufferPool *
_get_sinkpad_pool (GstVaBaseTransform * self)
{
GstAllocator *allocator;
GstAllocationParams params = { 0, };
GstCaps *caps;
GstVideoInfo in_info;
guint size, usage_hint = VA_SURFACE_ATTRIB_USAGE_HINT_VPP_READ;
if (self->priv->sinkpad_pool)
return self->priv->sinkpad_pool;
gst_allocation_params_init (&params);
if (self->priv->sinkpad_caps) {
caps = self->priv->sinkpad_caps;
gst_video_info_from_caps (&in_info, caps);
} else {
caps = self->in_caps;
in_info = self->in_info;
}
size = GST_VIDEO_INFO_SIZE (&in_info);
allocator = gst_va_base_transform_allocator_from_caps (self, caps);
self->priv->sinkpad_pool = gst_va_pool_new_with_config (caps, size, 1, 0,
usage_hint, allocator, &params);
if (!self->priv->sinkpad_pool) {
gst_object_unref (allocator);
return NULL;
}
if (GST_IS_VA_DMABUF_ALLOCATOR (allocator)) {
gst_va_dmabuf_allocator_get_format (allocator, &self->priv->sinkpad_info,
NULL);
} else if (GST_IS_VA_ALLOCATOR (allocator)) {
gst_va_allocator_get_format (allocator, &self->priv->sinkpad_info, NULL);
}
gst_object_unref (allocator);
gst_buffer_pool_set_active (self->priv->sinkpad_pool, TRUE);
return self->priv->sinkpad_pool;
}
static gboolean
_try_import_buffer (GstVaBaseTransform * self, GstBuffer * inbuf)
{
VASurfaceID surface;
gboolean ret;
surface = gst_va_buffer_get_surface (inbuf);
if (surface != VA_INVALID_ID)
return TRUE;
g_rec_mutex_lock (&GST_VA_SHARED_LOCK);
ret = _try_import_dmabuf_unlocked (self, inbuf);
g_rec_mutex_unlock (&GST_VA_SHARED_LOCK);
return ret;
}
GstFlowReturn
gst_va_base_transform_import_buffer (GstVaBaseTransform * self,
GstBuffer * inbuf, GstBuffer ** buf)
{
GstBuffer *buffer = NULL;
GstBufferPool *pool;
GstFlowReturn ret;
GstVideoFrame in_frame, out_frame;
gboolean imported, copied;
imported = _try_import_buffer (self, inbuf);
if (imported) {
*buf = gst_buffer_ref (inbuf);
return GST_FLOW_OK;
}
/* input buffer doesn't come from a vapool, thus it is required to
* have a pool, grab from it a new buffer and copy the input
* buffer to the new one */
if (!(pool = _get_sinkpad_pool (self)))
return GST_FLOW_ERROR;
ret = gst_buffer_pool_acquire_buffer (pool, &buffer, NULL);
if (ret != GST_FLOW_OK)
return ret;
GST_LOG_OBJECT (self, "copying input frame");
if (!gst_video_frame_map (&in_frame, &self->in_info, inbuf, GST_MAP_READ))
goto invalid_buffer;
if (!gst_video_frame_map (&out_frame, &self->priv->sinkpad_info, buffer,
GST_MAP_WRITE)) {
gst_video_frame_unmap (&in_frame);
goto invalid_buffer;
}
copied = gst_video_frame_copy (&out_frame, &in_frame);
gst_video_frame_unmap (&out_frame);
gst_video_frame_unmap (&in_frame);
if (!copied)
goto invalid_buffer;
/* copy metadata, default implemenation of baseclass will copy everything
* what we need */
GST_BASE_TRANSFORM_CLASS (parent_class)->copy_metadata
(GST_BASE_TRANSFORM_CAST (self), inbuf, buffer);
*buf = buffer;
return GST_FLOW_OK;
invalid_buffer:
{
GST_ELEMENT_WARNING (self, CORE, NOT_IMPLEMENTED, (NULL),
("invalid video buffer received"));
if (buffer)
gst_buffer_unref (buffer);
return GST_FLOW_OK;
}
}