gstreamer/omx/gstomxbufferpool.c
Guillaume Desmottes ea2df994f3 add support for NV12_10LE32 and NV16_10LE32 on zynqultrascaleplus
The encoder and decoder on zynqultrascaleplus support these new 10 bits
format.

https://bugzilla.gnome.org/show_bug.cgi?id=793694
2018-02-28 08:32:26 -05:00

694 lines
21 KiB
C

/*
* Copyright (C) 2011, Hewlett-Packard Development Company, L.P.
* Author: Sebastian Dröge <sebastian.droege@collabora.co.uk>, Collabora Ltd.
* Copyright (C) 2013, Collabora Ltd.
* Author: Sebastian Dröge <sebastian.droege@collabora.co.uk>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation
* version 2.1 of the License.
*
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstomxbufferpool.h"
#include <gst/allocators/gstdmabuf.h>
GST_DEBUG_CATEGORY_STATIC (gst_omx_buffer_pool_debug_category);
#define GST_CAT_DEFAULT gst_omx_buffer_pool_debug_category
GST_DEBUG_CATEGORY_STATIC (CAT_PERFORMANCE);
typedef struct _GstOMXMemory GstOMXMemory;
typedef struct _GstOMXMemoryAllocator GstOMXMemoryAllocator;
typedef struct _GstOMXMemoryAllocatorClass GstOMXMemoryAllocatorClass;
struct _GstOMXMemory
{
GstMemory mem;
GstOMXBuffer *buf;
};
struct _GstOMXMemoryAllocator
{
GstAllocator parent;
};
struct _GstOMXMemoryAllocatorClass
{
GstAllocatorClass parent_class;
};
#define GST_OMX_MEMORY_TYPE "openmax"
static GstMemory *
gst_omx_memory_allocator_alloc_dummy (GstAllocator * allocator, gsize size,
GstAllocationParams * params)
{
g_assert_not_reached ();
return NULL;
}
static void
gst_omx_memory_allocator_free (GstAllocator * allocator, GstMemory * mem)
{
GstOMXMemory *omem = (GstOMXMemory *) mem;
/* TODO: We need to remember which memories are still used
* so we can wait until everything is released before allocating
* new memory
*/
g_slice_free (GstOMXMemory, omem);
}
static gpointer
gst_omx_memory_map (GstMemory * mem, gsize maxsize, GstMapFlags flags)
{
GstOMXMemory *omem = (GstOMXMemory *) mem;
return omem->buf->omx_buf->pBuffer + omem->mem.offset;
}
static void
gst_omx_memory_unmap (GstMemory * mem)
{
}
static GstMemory *
gst_omx_memory_share (GstMemory * mem, gssize offset, gssize size)
{
g_assert_not_reached ();
return NULL;
}
GType gst_omx_memory_allocator_get_type (void);
G_DEFINE_TYPE (GstOMXMemoryAllocator, gst_omx_memory_allocator,
GST_TYPE_ALLOCATOR);
#define GST_TYPE_OMX_MEMORY_ALLOCATOR (gst_omx_memory_allocator_get_type())
#define GST_IS_OMX_MEMORY_ALLOCATOR(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_OMX_MEMORY_ALLOCATOR))
static void
gst_omx_memory_allocator_class_init (GstOMXMemoryAllocatorClass * klass)
{
GstAllocatorClass *allocator_class;
allocator_class = (GstAllocatorClass *) klass;
allocator_class->alloc = gst_omx_memory_allocator_alloc_dummy;
allocator_class->free = gst_omx_memory_allocator_free;
}
static void
gst_omx_memory_allocator_init (GstOMXMemoryAllocator * allocator)
{
GstAllocator *alloc = GST_ALLOCATOR_CAST (allocator);
alloc->mem_type = GST_OMX_MEMORY_TYPE;
alloc->mem_map = gst_omx_memory_map;
alloc->mem_unmap = gst_omx_memory_unmap;
alloc->mem_share = gst_omx_memory_share;
/* default copy & is_span */
GST_OBJECT_FLAG_SET (allocator, GST_ALLOCATOR_FLAG_CUSTOM_ALLOC);
}
static GstMemory *
gst_omx_memory_allocator_alloc (GstAllocator * allocator, GstMemoryFlags flags,
GstOMXBuffer * buf)
{
GstOMXMemory *mem;
gint align;
/* FIXME: We don't allow sharing because we need to know
* when the memory becomes unused and can only then put
* it back to the pool. Which is done in the pool's release
* function
*/
flags |= GST_MEMORY_FLAG_NO_SHARE;
/* GStreamer uses a bitmask for the alignment while
* OMX uses the alignment itself. So we have to convert
* here */
align = buf->port->port_def.nBufferAlignment;
if (align > 0)
align -= 1;
if (((align + 1) & align) != 0) {
GST_WARNING ("Invalid alignment that is not a power of two: %u",
(guint) buf->port->port_def.nBufferAlignment);
align = 0;
}
mem = g_slice_new (GstOMXMemory);
/* the shared memory is always readonly */
gst_memory_init (GST_MEMORY_CAST (mem), flags, allocator, NULL,
buf->omx_buf->nAllocLen, align, 0, buf->omx_buf->nAllocLen);
mem->buf = buf;
return GST_MEMORY_CAST (mem);
}
/* Buffer pool for the buffers of an OpenMAX port.
*
* This pool is only used if we either passed buffers from another
* pool to the OMX port or provide the OMX buffers directly to other
* elements.
*
*
* A buffer is in the pool if it is currently owned by the port,
* i.e. after OMX_{Fill,Empty}ThisBuffer(). A buffer is outside
* the pool after it was taken from the port after it was handled
* by the port, i.e. {Empty,Fill}BufferDone.
*
* Buffers can be allocated by us (OMX_AllocateBuffer()) or allocated
* by someone else and (temporarily) passed to this pool
* (OMX_UseBuffer(), OMX_UseEGLImage()). In the latter case the pool of
* the buffer will be overriden, and restored in free_buffer(). Other
* buffers are just freed there.
*
* The pool always has a fixed number of minimum and maximum buffers
* and these are allocated while starting the pool and released afterwards.
* They correspond 1:1 to the OMX buffers of the port, which are allocated
* before the pool is started.
*
* Acquiring a buffer from this pool happens after the OMX buffer has
* been acquired from the port. gst_buffer_pool_acquire_buffer() is
* supposed to return the buffer that corresponds to the OMX buffer.
*
* For buffers provided to upstream, the buffer will be passed to
* the component manually when it arrives and then unreffed. If the
* buffer is released before reaching the component it will be just put
* back into the pool as if EmptyBufferDone has happened. If it was
* passed to the component, it will be back into the pool when it was
* released and EmptyBufferDone has happened.
*
* For buffers provided to downstream, the buffer will be returned
* back to the component (OMX_FillThisBuffer()) when it is released.
*/
static GQuark gst_omx_buffer_data_quark = 0;
#define DEBUG_INIT \
GST_DEBUG_CATEGORY_INIT (gst_omx_buffer_pool_debug_category, "omxbufferpool", 0, \
"debug category for gst-omx buffer pool base class");
G_DEFINE_TYPE_WITH_CODE (GstOMXBufferPool, gst_omx_buffer_pool,
GST_TYPE_BUFFER_POOL, DEBUG_INIT);
static void gst_omx_buffer_pool_free_buffer (GstBufferPool * bpool,
GstBuffer * buffer);
static gboolean
gst_omx_buffer_pool_start (GstBufferPool * bpool)
{
GstOMXBufferPool *pool = GST_OMX_BUFFER_POOL (bpool);
/* Only allow to start the pool if we still are attached
* to a component and port */
GST_OBJECT_LOCK (pool);
if (!pool->component || !pool->port) {
GST_OBJECT_UNLOCK (pool);
return FALSE;
}
GST_OBJECT_UNLOCK (pool);
return
GST_BUFFER_POOL_CLASS (gst_omx_buffer_pool_parent_class)->start (bpool);
}
static gboolean
gst_omx_buffer_pool_stop (GstBufferPool * bpool)
{
GstOMXBufferPool *pool = GST_OMX_BUFFER_POOL (bpool);
gint i = 0;
/* When not using the default GstBufferPool::GstAtomicQueue then
* GstBufferPool::free_buffer is not called while stopping the pool
* (because the queue is empty) */
for (i = 0; i < pool->buffers->len; i++)
GST_BUFFER_POOL_CLASS (gst_omx_buffer_pool_parent_class)->release_buffer
(bpool, g_ptr_array_index (pool->buffers, i));
/* Remove any buffers that are there */
g_ptr_array_set_size (pool->buffers, 0);
if (pool->caps)
gst_caps_unref (pool->caps);
pool->caps = NULL;
pool->add_videometa = FALSE;
return GST_BUFFER_POOL_CLASS (gst_omx_buffer_pool_parent_class)->stop (bpool);
}
static const gchar **
gst_omx_buffer_pool_get_options (GstBufferPool * bpool)
{
static const gchar *raw_video_options[] =
{ GST_BUFFER_POOL_OPTION_VIDEO_META, NULL };
static const gchar *options[] = { NULL };
GstOMXBufferPool *pool = GST_OMX_BUFFER_POOL (bpool);
GST_OBJECT_LOCK (pool);
if (pool->port && pool->port->port_def.eDomain == OMX_PortDomainVideo
&& pool->port->port_def.format.video.eCompressionFormat ==
OMX_VIDEO_CodingUnused) {
GST_OBJECT_UNLOCK (pool);
return raw_video_options;
}
GST_OBJECT_UNLOCK (pool);
return options;
}
static gboolean
gst_omx_buffer_pool_set_config (GstBufferPool * bpool, GstStructure * config)
{
GstOMXBufferPool *pool = GST_OMX_BUFFER_POOL (bpool);
GstCaps *caps;
GST_OBJECT_LOCK (pool);
if (!gst_buffer_pool_config_get_params (config, &caps, NULL, NULL, NULL))
goto wrong_config;
if (caps == NULL)
goto no_caps;
if (pool->port && pool->port->port_def.eDomain == OMX_PortDomainVideo
&& pool->port->port_def.format.video.eCompressionFormat ==
OMX_VIDEO_CodingUnused) {
GstVideoInfo info;
/* now parse the caps from the config */
if (!gst_video_info_from_caps (&info, caps))
goto wrong_video_caps;
/* enable metadata based on config of the pool */
pool->add_videometa =
gst_buffer_pool_config_has_option (config,
GST_BUFFER_POOL_OPTION_VIDEO_META);
pool->video_info = info;
}
if (pool->caps)
gst_caps_unref (pool->caps);
pool->caps = gst_caps_ref (caps);
GST_OBJECT_UNLOCK (pool);
return GST_BUFFER_POOL_CLASS (gst_omx_buffer_pool_parent_class)->set_config
(bpool, config);
/* ERRORS */
wrong_config:
{
GST_OBJECT_UNLOCK (pool);
GST_WARNING_OBJECT (pool, "invalid config");
return FALSE;
}
no_caps:
{
GST_OBJECT_UNLOCK (pool);
GST_WARNING_OBJECT (pool, "no caps in config");
return FALSE;
}
wrong_video_caps:
{
GST_OBJECT_UNLOCK (pool);
GST_WARNING_OBJECT (pool,
"failed getting geometry from caps %" GST_PTR_FORMAT, caps);
return FALSE;
}
}
static GstFlowReturn
gst_omx_buffer_pool_alloc_buffer (GstBufferPool * bpool,
GstBuffer ** buffer, GstBufferPoolAcquireParams * params)
{
GstOMXBufferPool *pool = GST_OMX_BUFFER_POOL (bpool);
GstBuffer *buf;
GstOMXBuffer *omx_buf;
g_return_val_if_fail (pool->allocating, GST_FLOW_ERROR);
omx_buf = g_ptr_array_index (pool->port->buffers, pool->current_buffer_index);
g_return_val_if_fail (omx_buf != NULL, GST_FLOW_ERROR);
if (pool->other_pool) {
guint i, n;
buf = g_ptr_array_index (pool->buffers, pool->current_buffer_index);
g_assert (pool->other_pool == buf->pool);
gst_object_replace ((GstObject **) & buf->pool, NULL);
n = gst_buffer_n_memory (buf);
for (i = 0; i < n; i++) {
GstMemory *mem = gst_buffer_peek_memory (buf, i);
/* FIXME: We don't allow sharing because we need to know
* when the memory becomes unused and can only then put
* it back to the pool. Which is done in the pool's release
* function
*/
GST_MINI_OBJECT_FLAG_SET (mem, GST_MEMORY_FLAG_NO_SHARE);
}
if (pool->add_videometa) {
GstVideoMeta *meta;
meta = gst_buffer_get_video_meta (buf);
if (!meta) {
gst_buffer_add_video_meta (buf, GST_VIDEO_FRAME_FLAG_NONE,
GST_VIDEO_INFO_FORMAT (&pool->video_info),
GST_VIDEO_INFO_WIDTH (&pool->video_info),
GST_VIDEO_INFO_HEIGHT (&pool->video_info));
}
}
pool->need_copy = FALSE;
} else {
GstMemory *mem;
const guint nstride = pool->port->port_def.format.video.nStride;
const guint nslice = pool->port->port_def.format.video.nSliceHeight;
gsize offset[GST_VIDEO_MAX_PLANES] = { 0, };
gint stride[GST_VIDEO_MAX_PLANES] = { nstride, 0, };
if (pool->output_mode == GST_OMX_BUFFER_MODE_DMABUF) {
gint fd;
GstMapInfo map;
fd = GPOINTER_TO_INT (omx_buf->omx_buf->pBuffer);
mem =
gst_dmabuf_allocator_alloc (pool->allocator, fd,
omx_buf->omx_buf->nAllocLen);
if (!gst_caps_features_contains (gst_caps_get_features (pool->caps, 0),
GST_CAPS_FEATURE_MEMORY_DMABUF)) {
/* Check if the memory is actually mappable */
if (!gst_memory_map (mem, &map, GST_MAP_READWRITE)) {
GST_ERROR_OBJECT (pool,
"dmabuf memory is not mappable but caps does not have the 'memory:DMABuf' feature");
gst_memory_unref (mem);
return GST_FLOW_ERROR;
}
gst_memory_unmap (mem, &map);
}
} else {
mem = gst_omx_memory_allocator_alloc (pool->allocator, 0, omx_buf);
}
buf = gst_buffer_new ();
gst_buffer_append_memory (buf, mem);
g_ptr_array_add (pool->buffers, buf);
switch (GST_VIDEO_INFO_FORMAT (&pool->video_info)) {
case GST_VIDEO_FORMAT_ABGR:
case GST_VIDEO_FORMAT_ARGB:
case GST_VIDEO_FORMAT_RGB16:
case GST_VIDEO_FORMAT_BGR16:
case GST_VIDEO_FORMAT_YUY2:
case GST_VIDEO_FORMAT_UYVY:
case GST_VIDEO_FORMAT_YVYU:
case GST_VIDEO_FORMAT_GRAY8:
break;
case GST_VIDEO_FORMAT_I420:
stride[1] = nstride / 2;
offset[1] = offset[0] + stride[0] * nslice;
stride[2] = nstride / 2;
offset[2] = offset[1] + (stride[1] * nslice / 2);
break;
case GST_VIDEO_FORMAT_NV12:
case GST_VIDEO_FORMAT_NV12_10LE32:
case GST_VIDEO_FORMAT_NV16:
case GST_VIDEO_FORMAT_NV16_10LE32:
stride[1] = nstride;
offset[1] = offset[0] + stride[0] * nslice;
break;
default:
g_assert_not_reached ();
break;
}
if (pool->add_videometa) {
pool->need_copy = FALSE;
} else {
GstVideoInfo info;
gboolean need_copy = FALSE;
gint i;
gst_video_info_init (&info);
gst_video_info_set_format (&info,
GST_VIDEO_INFO_FORMAT (&pool->video_info),
GST_VIDEO_INFO_WIDTH (&pool->video_info),
GST_VIDEO_INFO_HEIGHT (&pool->video_info));
for (i = 0; i < GST_VIDEO_INFO_N_PLANES (&pool->video_info); i++) {
if (info.stride[i] != stride[i] || info.offset[i] != offset[i]) {
GST_CAT_DEBUG_OBJECT (CAT_PERFORMANCE, pool,
"Need to copy output frames because of stride/offset mismatch: plane %d stride %d (expected: %d) offset %"
G_GSIZE_FORMAT " (expected: %" G_GSIZE_FORMAT
") nStride: %d nSliceHeight: %d ", i, stride[i], info.stride[i],
offset[i], info.offset[i], nstride, nslice);
need_copy = TRUE;
break;
}
}
pool->need_copy = need_copy;
}
if (pool->need_copy || pool->add_videometa) {
/* We always add the videometa. It's the job of the user
* to copy the buffer if pool->need_copy is TRUE
*/
gst_buffer_add_video_meta_full (buf, GST_VIDEO_FRAME_FLAG_NONE,
GST_VIDEO_INFO_FORMAT (&pool->video_info),
GST_VIDEO_INFO_WIDTH (&pool->video_info),
GST_VIDEO_INFO_HEIGHT (&pool->video_info),
GST_VIDEO_INFO_N_PLANES (&pool->video_info), offset, stride);
}
}
gst_mini_object_set_qdata (GST_MINI_OBJECT_CAST (buf),
gst_omx_buffer_data_quark, omx_buf, NULL);
*buffer = buf;
pool->current_buffer_index++;
return GST_FLOW_OK;
}
static void
gst_omx_buffer_pool_free_buffer (GstBufferPool * bpool, GstBuffer * buffer)
{
GstOMXBufferPool *pool = GST_OMX_BUFFER_POOL (bpool);
/* If the buffers belong to another pool, restore them now */
GST_OBJECT_LOCK (pool);
if (pool->other_pool) {
gst_object_replace ((GstObject **) & buffer->pool,
(GstObject *) pool->other_pool);
}
GST_OBJECT_UNLOCK (pool);
gst_mini_object_set_qdata (GST_MINI_OBJECT_CAST (buffer),
gst_omx_buffer_data_quark, NULL, NULL);
GST_BUFFER_POOL_CLASS (gst_omx_buffer_pool_parent_class)->free_buffer (bpool,
buffer);
}
static GstFlowReturn
gst_omx_buffer_pool_acquire_buffer (GstBufferPool * bpool,
GstBuffer ** buffer, GstBufferPoolAcquireParams * params)
{
GstFlowReturn ret;
GstOMXBufferPool *pool = GST_OMX_BUFFER_POOL (bpool);
if (pool->port->port_def.eDir == OMX_DirOutput) {
GstBuffer *buf;
g_return_val_if_fail (pool->current_buffer_index != -1, GST_FLOW_ERROR);
buf = g_ptr_array_index (pool->buffers, pool->current_buffer_index);
g_return_val_if_fail (buf != NULL, GST_FLOW_ERROR);
*buffer = buf;
ret = GST_FLOW_OK;
/* If it's our own memory we have to set the sizes */
if (!pool->other_pool) {
GstMemory *mem = gst_buffer_peek_memory (*buffer, 0);
GstOMXBuffer *omx_buf;
if (pool->output_mode == GST_OMX_BUFFER_MODE_DMABUF) {
omx_buf =
gst_mini_object_get_qdata (GST_MINI_OBJECT_CAST (buf),
gst_omx_buffer_data_quark);
} else {
g_assert (mem
&& g_strcmp0 (mem->allocator->mem_type, GST_OMX_MEMORY_TYPE) == 0);
/* We already have a pointer to the GstOMXBuffer, no need to retrieve it
* from the qdata */
omx_buf = ((GstOMXMemory *) mem)->buf;
}
mem->size = omx_buf->omx_buf->nFilledLen;
mem->offset = omx_buf->omx_buf->nOffset;
}
} else {
/* Acquire any buffer that is available to be filled by upstream */
ret =
GST_BUFFER_POOL_CLASS (gst_omx_buffer_pool_parent_class)->acquire_buffer
(bpool, buffer, params);
}
return ret;
}
static void
gst_omx_buffer_pool_release_buffer (GstBufferPool * bpool, GstBuffer * buffer)
{
GstOMXBufferPool *pool = GST_OMX_BUFFER_POOL (bpool);
OMX_ERRORTYPE err;
GstOMXBuffer *omx_buf;
g_assert (pool->component && pool->port);
if (!pool->allocating && !pool->deactivated) {
omx_buf =
gst_mini_object_get_qdata (GST_MINI_OBJECT_CAST (buffer),
gst_omx_buffer_data_quark);
if (pool->port->port_def.eDir == OMX_DirOutput && !omx_buf->used) {
/* Release back to the port, can be filled again */
err = gst_omx_port_release_buffer (pool->port, omx_buf);
if (err != OMX_ErrorNone) {
GST_ELEMENT_ERROR (pool->element, LIBRARY, SETTINGS, (NULL),
("Failed to relase output buffer to component: %s (0x%08x)",
gst_omx_error_to_string (err), err));
}
} else if (!omx_buf->used) {
/* TODO: Implement.
*
* If not used (i.e. was not passed to the component) this should do
* the same as EmptyBufferDone.
* If it is used (i.e. was passed to the component) this should do
* nothing until EmptyBufferDone.
*
* EmptyBufferDone should release the buffer to the pool so it can
* be allocated again
*
* Needs something to call back here in EmptyBufferDone, like keeping
* a ref on the buffer in GstOMXBuffer until EmptyBufferDone... which
* would ensure that the buffer is always unused when this is called.
*/
g_assert_not_reached ();
GST_BUFFER_POOL_CLASS (gst_omx_buffer_pool_parent_class)->release_buffer
(bpool, buffer);
}
}
}
static void
gst_omx_buffer_pool_finalize (GObject * object)
{
GstOMXBufferPool *pool = GST_OMX_BUFFER_POOL (object);
if (pool->element)
gst_object_unref (pool->element);
pool->element = NULL;
if (pool->buffers)
g_ptr_array_unref (pool->buffers);
pool->buffers = NULL;
if (pool->other_pool)
gst_object_unref (pool->other_pool);
pool->other_pool = NULL;
if (pool->allocator)
gst_object_unref (pool->allocator);
pool->allocator = NULL;
if (pool->caps)
gst_caps_unref (pool->caps);
pool->caps = NULL;
G_OBJECT_CLASS (gst_omx_buffer_pool_parent_class)->finalize (object);
}
static void
gst_omx_buffer_pool_class_init (GstOMXBufferPoolClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstBufferPoolClass *gstbufferpool_class = (GstBufferPoolClass *) klass;
gst_omx_buffer_data_quark = g_quark_from_static_string ("GstOMXBufferData");
gobject_class->finalize = gst_omx_buffer_pool_finalize;
gstbufferpool_class->start = gst_omx_buffer_pool_start;
gstbufferpool_class->stop = gst_omx_buffer_pool_stop;
gstbufferpool_class->get_options = gst_omx_buffer_pool_get_options;
gstbufferpool_class->set_config = gst_omx_buffer_pool_set_config;
gstbufferpool_class->alloc_buffer = gst_omx_buffer_pool_alloc_buffer;
gstbufferpool_class->free_buffer = gst_omx_buffer_pool_free_buffer;
gstbufferpool_class->acquire_buffer = gst_omx_buffer_pool_acquire_buffer;
gstbufferpool_class->release_buffer = gst_omx_buffer_pool_release_buffer;
GST_DEBUG_CATEGORY_GET (CAT_PERFORMANCE, "GST_PERFORMANCE");
}
static void
gst_omx_buffer_pool_init (GstOMXBufferPool * pool)
{
pool->buffers = g_ptr_array_new ();
}
GstBufferPool *
gst_omx_buffer_pool_new (GstElement * element, GstOMXComponent * component,
GstOMXPort * port, GstOMXBufferMode output_mode)
{
GstOMXBufferPool *pool;
pool = g_object_new (gst_omx_buffer_pool_get_type (), NULL);
pool->element = gst_object_ref (element);
pool->component = component;
pool->port = port;
pool->output_mode = output_mode;
switch (output_mode) {
case GST_OMX_BUFFER_MODE_DMABUF:
pool->allocator = gst_dmabuf_allocator_new ();
break;
case GST_OMX_BUFFER_MODE_SYSTEM_MEMORY:
pool->allocator =
g_object_new (gst_omx_memory_allocator_get_type (), NULL);
break;
default:
g_assert_not_reached ();
}
return GST_BUFFER_POOL (pool);
}