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gstreamer/gst-libs/gst/gl/gstglmemory.c
Matthew Waters 18a812a30f gl*memory: document new functionality and objects
2017-12-09 19:32:17 +00:00

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/*
* GStreamer
* Copyright (C) 2015 Matthew Waters <matthew@centricular.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 <string.h>
#include <gst/video/video.h>
#include <gst/gl/gstglbasememory.h>
#include <gst/gl/gstglmemory.h>
/**
* SECTION:gstglmemory
* @short_description: memory subclass for GL textures
* @see_also: #GstMemory, #GstAllocator, #GstGLBufferPool
*
* GstGLMemory is a #GstGLBaseMemory subclass providing support for the mapping of
* OpenGL textures.
*
* #GstGLMemory is created or wrapped through gst_gl_base_memory_alloc()
* with #GstGLVideoAllocationParams.
*
* Data is uploaded or downloaded from the GPU as is necessary.
*/
#define USING_OPENGL(context) (gst_gl_context_check_gl_version (context, GST_GL_API_OPENGL, 1, 0))
#define USING_OPENGL3(context) (gst_gl_context_check_gl_version (context, GST_GL_API_OPENGL3, 3, 1))
#define USING_GLES(context) (gst_gl_context_check_gl_version (context, GST_GL_API_GLES, 1, 0))
#define USING_GLES2(context) (gst_gl_context_check_gl_version (context, GST_GL_API_GLES2, 2, 0))
#define USING_GLES3(context) (gst_gl_context_check_gl_version (context, GST_GL_API_GLES2, 3, 0))
#define GL_MEM_WIDTH(gl_mem) _get_plane_width (&gl_mem->info, gl_mem->plane)
#define GL_MEM_HEIGHT(gl_mem) _get_plane_height (&gl_mem->info, gl_mem->plane)
#define GL_MEM_STRIDE(gl_mem) GST_VIDEO_INFO_PLANE_STRIDE (&gl_mem->info, gl_mem->plane)
static GstAllocator *_gl_memory_allocator;
GST_DEBUG_CATEGORY_STATIC (GST_CAT_GL_MEMORY);
#define GST_CAT_DEFAULT GST_CAT_GL_MEMORY
/* compatability definitions... */
#ifndef GL_UNPACK_ROW_LENGTH
#define GL_UNPACK_ROW_LENGTH 0x0CF2
#endif
#ifndef GL_TEXTURE_RECTANGLE
#define GL_TEXTURE_RECTANGLE 0x84F5
#endif
#ifndef GL_TEXTURE_EXTERNAL_OES
#define GL_TEXTURE_EXTERNAL_OES 0x8D65
#endif
G_DEFINE_TYPE (GstGLMemoryAllocator, gst_gl_memory_allocator,
GST_TYPE_GL_BASE_MEMORY_ALLOCATOR);
typedef struct
{
/* in */
GstGLMemory *src;
GstVideoGLTextureType out_format;
guint out_width, out_height;
GstGLTextureTarget tex_target;
GstVideoGLTextureType tex_type;
/* inout */
guint tex_id;
/* out */
gboolean result;
} GstGLMemoryCopyParams;
static inline guint
_get_plane_width (GstVideoInfo * info, guint plane)
{
if (GST_VIDEO_INFO_IS_YUV (info))
/* For now component width and plane width are the same and the
* plane-component mapping matches
*/
return GST_VIDEO_INFO_COMP_WIDTH (info, plane);
else /* RGB, GRAY */
return GST_VIDEO_INFO_WIDTH (info);
}
static inline guint
_get_plane_height (GstVideoInfo * info, guint plane)
{
if (GST_VIDEO_INFO_IS_YUV (info))
/* For now component width and plane width are the same and the
* plane-component mapping matches
*/
return GST_VIDEO_INFO_COMP_HEIGHT (info, plane);
else /* RGB, GRAY */
return GST_VIDEO_INFO_HEIGHT (info);
}
static inline void
_calculate_unpack_length (GstGLMemory * gl_mem, GstGLContext * context)
{
guint n_gl_bytes;
gl_mem->tex_scaling[0] = 1.0f;
gl_mem->tex_scaling[1] = 1.0f;
gl_mem->unpack_length = 1;
gl_mem->tex_width = GL_MEM_WIDTH (gl_mem);
n_gl_bytes = gst_gl_texture_type_n_bytes (gl_mem->tex_type);
if (n_gl_bytes == 0) {
GST_ERROR ("Unsupported texture type %d", gl_mem->tex_type);
return;
}
if (USING_OPENGL (context) || USING_GLES3 (context)
|| USING_OPENGL3 (context)) {
gl_mem->unpack_length = GL_MEM_STRIDE (gl_mem) / n_gl_bytes;
} else if (USING_GLES2 (context)) {
guint j = 8;
while (j >= n_gl_bytes) {
/* GST_ROUND_UP_j(GL_MEM_WIDTH (gl_mem) * n_gl_bytes) */
guint round_up_j =
((GL_MEM_WIDTH (gl_mem) * n_gl_bytes) + j - 1) & ~(j - 1);
if (round_up_j == GL_MEM_STRIDE (gl_mem)) {
GST_CAT_LOG (GST_CAT_GL_MEMORY, "Found alignment of %u based on "
"width (with plane width:%u, plane stride:%u and pixel stride:%u. "
"RU%u(%u*%u) = %u)", j, GL_MEM_WIDTH (gl_mem),
GL_MEM_STRIDE (gl_mem), n_gl_bytes, j, GL_MEM_WIDTH (gl_mem),
n_gl_bytes, round_up_j);
gl_mem->unpack_length = j;
break;
}
j >>= 1;
}
if (j < n_gl_bytes) {
/* Failed to find a suitable alignment, try based on plane_stride and
* scale in the shader. Useful for alignments that are greater than 8.
*/
j = 8;
while (j >= n_gl_bytes) {
/* GST_ROUND_UP_j((GL_MEM_STRIDE (gl_mem)) */
guint round_up_j = ((GL_MEM_STRIDE (gl_mem)) + j - 1) & ~(j - 1);
if (round_up_j == (GL_MEM_STRIDE (gl_mem))) {
GST_CAT_LOG (GST_CAT_GL_MEMORY, "Found alignment of %u based "
"on stride (with plane stride:%u and pixel stride:%u. "
"RU%u(%u) = %u)", j, GL_MEM_STRIDE (gl_mem), n_gl_bytes, j,
GL_MEM_STRIDE (gl_mem), round_up_j);
gl_mem->unpack_length = j;
gl_mem->tex_scaling[0] =
(gfloat) (GL_MEM_WIDTH (gl_mem) * n_gl_bytes) /
(gfloat) GL_MEM_STRIDE (gl_mem);
gl_mem->tex_width = GL_MEM_STRIDE (gl_mem) / n_gl_bytes;
break;
}
j >>= 1;
}
if (j < n_gl_bytes) {
GST_CAT_ERROR (GST_CAT_GL_MEMORY, "Failed to find matching "
"alignment. Image may look corrupted. plane width:%u, "
"plane stride:%u and pixel stride:%u", GL_MEM_WIDTH (gl_mem),
GL_MEM_STRIDE (gl_mem), n_gl_bytes);
}
}
}
if (gl_mem->tex_target == GST_GL_TEXTURE_TARGET_RECTANGLE) {
guint w_sub =
GST_VIDEO_FORMAT_INFO_W_SUB (gl_mem->info.finfo, gl_mem->plane);
guint h_sub =
GST_VIDEO_FORMAT_INFO_H_SUB (gl_mem->info.finfo, gl_mem->plane);
if (w_sub)
gl_mem->tex_scaling[0] /= (1 << w_sub);
if (h_sub)
gl_mem->tex_scaling[1] /= (1 << h_sub);
}
}
static guint
_new_texture (GstGLContext * context, guint target, guint internal_format,
guint format, guint type, guint width, guint height)
{
const GstGLFuncs *gl = context->gl_vtable;
guint tex_id;
gl->GenTextures (1, &tex_id);
gl->BindTexture (target, tex_id);
if (target == GL_TEXTURE_2D || target == GL_TEXTURE_RECTANGLE)
gl->TexImage2D (target, 0, internal_format, width, height, 0, format, type,
NULL);
gl->TexParameteri (target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
gl->TexParameteri (target, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
gl->TexParameteri (target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
gl->TexParameteri (target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
gl->BindTexture (target, 0);
return tex_id;
}
static gboolean
_gl_tex_create (GstGLMemory * gl_mem, GError ** error)
{
GstGLContext *context = gl_mem->mem.context;
GLenum internal_format;
GLenum tex_format;
GLenum tex_type;
tex_format = gst_gl_format_from_gl_texture_type (gl_mem->tex_type);
tex_type = GL_UNSIGNED_BYTE;
if (gl_mem->tex_type == GST_VIDEO_GL_TEXTURE_TYPE_RGB16)
tex_type = GL_UNSIGNED_SHORT_5_6_5;
internal_format =
gst_gl_sized_gl_format_from_gl_format_type (context, tex_format,
tex_type);
if (!gl_mem->texture_wrapped) {
gl_mem->tex_id =
_new_texture (context, gst_gl_texture_target_to_gl (gl_mem->tex_target),
internal_format, tex_format, tex_type, gl_mem->tex_width,
GL_MEM_HEIGHT (gl_mem));
GST_TRACE ("Generating texture id:%u format:%u type:%u dimensions:%ux%u",
gl_mem->tex_id, tex_format, tex_type, gl_mem->tex_width,
GL_MEM_HEIGHT (gl_mem));
}
return TRUE;
}
/**
* gst_gl_memory_init:
* @mem: the #GstGLBaseMemory to initialize
* @allocator: the #GstAllocator to initialize with
* @parent: (allow-none): the parent #GstMemory to initialize with
* @context: the #GstGLContext to initialize with
* @target: the #GstGLTextureTarget for this #GstGLMemory
* @params: (allow-none): the @GstAllocationParams to initialize with
* @info: the #GstVideoInfo for this #GstGLMemory
* @plane: the plane number (starting from 0) for this #GstGLMemory
* @valign: (allow-none): optional #GstVideoAlignment parameters
* @notify: (allow-none): a #GDestroyNotify
* @user_data: (allow-none): user data to call @notify with
*
* Initializes @mem with the required parameters. @info is assumed to have
* already have been modified with gst_video_info_align().
*
* Since: 1.8
*/
void
gst_gl_memory_init (GstGLMemory * mem, GstAllocator * allocator,
GstMemory * parent, GstGLContext * context, GstGLTextureTarget target,
GstAllocationParams * params, GstVideoInfo * info, guint plane,
GstVideoAlignment * valign, gpointer user_data, GDestroyNotify notify)
{
const gchar *target_str;
gsize size;
g_return_if_fail (plane < GST_VIDEO_INFO_N_PLANES (info));
mem->info = *info;
if (valign)
mem->valign = *valign;
else
gst_video_alignment_reset (&mem->valign);
/* double-check alignment requirements (caller should've taken care of this) */
if (params) {
guint max_align, n;
max_align = gst_memory_alignment;
max_align |= params->align;
for (n = 0; n < GST_VIDEO_MAX_PLANES; ++n)
max_align |= mem->valign.stride_align[n];
if (params->align < max_align && max_align > gst_memory_alignment) {
GST_WARNING ("allocation params alignment %" G_GSIZE_FORMAT " is smaller "
"than the max required video alignment %u", params->align, max_align);
}
}
size = gst_gl_get_plane_data_size (info, valign, plane);
mem->tex_target = target;
mem->tex_type =
gst_gl_texture_type_from_format (context, GST_VIDEO_INFO_FORMAT (info),
plane);
mem->plane = plane;
_calculate_unpack_length (mem, context);
gst_gl_base_memory_init ((GstGLBaseMemory *) mem, allocator, parent, context,
params, size, user_data, notify);
target_str = gst_gl_texture_target_to_string (target);
GST_CAT_DEBUG (GST_CAT_GL_MEMORY, "new GL texture context:%"
GST_PTR_FORMAT " memory:%p target:%s format:%u dimensions:%ux%u "
"stride:%u size:%" G_GSIZE_FORMAT, context, mem, target_str,
mem->tex_type, mem->tex_width, GL_MEM_HEIGHT (mem), GL_MEM_STRIDE (mem),
mem->mem.mem.size);
}
/**
* gst_gl_memory_read_pixels:
* @gl_mem: a #GstGLMemory
* @read_pointer: the data pointer to pass to glReadPixels
*
* Reads the texture in #GstGLMemory into @read_pointer if no buffer is bound
* to %GL_PIXEL_PACK_BUFFER. Otherwise @read_pointer is the byte offset into
* the currently bound %GL_PIXEL_PACK_BUFFER buffer to store the result of
* glReadPixels. See the OpenGL specification for glReadPixels for more
* details.
*
* Returns: whether theread operation succeeded
*
* Since: 1.8
*/
gboolean
gst_gl_memory_read_pixels (GstGLMemory * gl_mem, gpointer read_pointer)
{
GstGLContext *context = gl_mem->mem.context;
const GstGLFuncs *gl = context->gl_vtable;
guint format, type;
guint fbo;
format = gst_gl_format_from_gl_texture_type (gl_mem->tex_type);
type = GL_UNSIGNED_BYTE;
if (gl_mem->tex_type == GST_VIDEO_GL_TEXTURE_TYPE_RGB16)
type = GL_UNSIGNED_SHORT_5_6_5;
/* FIXME: avoid creating a framebuffer every download/copy */
gl->GenFramebuffers (1, &fbo);
gl->BindFramebuffer (GL_FRAMEBUFFER, fbo);
gl->FramebufferTexture2D (GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
gst_gl_texture_target_to_gl (gl_mem->tex_target), gl_mem->tex_id, 0);
if (!gst_gl_context_check_framebuffer_status (context)) {
GST_CAT_WARNING (GST_CAT_GL_MEMORY,
"Could not create framebuffer to read pixels for memory %p", gl_mem);
gl->DeleteFramebuffers (1, &fbo);
return FALSE;
}
gst_gl_query_start_log (GST_GL_BASE_MEMORY_CAST (gl_mem)->query,
GST_CAT_GL_MEMORY, GST_LEVEL_LOG, NULL, "%s", "glReadPixels took");
gl->ReadPixels (0, 0, gl_mem->tex_width, GL_MEM_HEIGHT (gl_mem), format,
type, read_pointer);
gst_gl_query_end (GST_GL_BASE_MEMORY_CAST (gl_mem)->query);
gl->BindFramebuffer (GL_FRAMEBUFFER, 0);
gl->DeleteFramebuffers (1, &fbo);
return TRUE;
}
static gpointer
_gl_tex_download_get_tex_image (GstGLMemory * gl_mem, GstMapInfo * info,
gsize size)
{
GstGLContext *context = gl_mem->mem.context;
const GstGLFuncs *gl = context->gl_vtable;
if (size != -1 && size != ((GstMemory *) gl_mem)->maxsize)
return NULL;
if (USING_GLES2 (context) || USING_GLES3 (context))
return NULL;
/* taken care of by read pixels */
if (gl_mem->tex_type != GST_VIDEO_GL_TEXTURE_TYPE_LUMINANCE
&& gl_mem->tex_type != GST_VIDEO_GL_TEXTURE_TYPE_LUMINANCE_ALPHA)
return NULL;
if (info->flags & GST_MAP_READ
&& GST_MEMORY_FLAG_IS_SET (gl_mem,
GST_GL_BASE_MEMORY_TRANSFER_NEED_DOWNLOAD)) {
guint format, type;
guint target;
GST_CAT_TRACE (GST_CAT_GL_MEMORY, "attempting download of texture %u "
"using glGetTexImage", gl_mem->tex_id);
format = gst_gl_format_from_gl_texture_type (gl_mem->tex_type);
type = GL_UNSIGNED_BYTE;
if (gl_mem->tex_type == GST_VIDEO_GL_TEXTURE_TYPE_RGB16)
type = GL_UNSIGNED_SHORT_5_6_5;
target = gst_gl_texture_target_to_gl (gl_mem->tex_target);
gl->BindTexture (target, gl_mem->tex_id);
gst_gl_query_start_log (GST_GL_BASE_MEMORY_CAST (gl_mem)->query,
GST_CAT_GL_MEMORY, GST_LEVEL_LOG, NULL, "%s", "glGetTexImage took");
gl->GetTexImage (target, 0, format, type, gl_mem->mem.data);
gst_gl_query_end (GST_GL_BASE_MEMORY_CAST (gl_mem)->query);
gl->BindTexture (target, 0);
}
return gl_mem->mem.data;
}
static gpointer
_gl_tex_download_read_pixels (GstGLMemory * gl_mem, GstMapInfo * info,
gsize size)
{
if (size != -1 && size != ((GstMemory *) gl_mem)->maxsize)
return NULL;
if (info->flags & GST_MAP_READ
&& GST_MEMORY_FLAG_IS_SET (gl_mem,
GST_GL_BASE_MEMORY_TRANSFER_NEED_DOWNLOAD)) {
GST_CAT_TRACE (GST_CAT_GL_MEMORY,
"attempting download of texture %u " "using glReadPixels",
gl_mem->tex_id);
if (!gst_gl_memory_read_pixels (gl_mem, gl_mem->mem.data))
return NULL;
}
return gl_mem->mem.data;
}
static gpointer
_gl_tex_map_cpu_access (GstGLMemory * gl_mem, GstMapInfo * info, gsize size)
{
gpointer data = NULL;
if (!gst_gl_base_memory_alloc_data (GST_GL_BASE_MEMORY_CAST (gl_mem)))
return NULL;
if (!data)
data = _gl_tex_download_get_tex_image (gl_mem, info, size);
if (!data)
data = _gl_tex_download_read_pixels (gl_mem, info, size);
return data;
}
static void
_upload_cpu_write (GstGLMemory * gl_mem, GstMapInfo * info, gsize maxsize)
{
gst_gl_memory_texsubimage (gl_mem, gl_mem->mem.data);
}
/**
* gst_gl_memory_texsubimage:
* @gl_mem: a #GstGLMemory
* @read_pointer: the data pointer to pass to glTexSubImage
*
* See gst_gl_memory_read_pixels() for what @read_pointer signifies.
*
* Since: 1.8
*/
void
gst_gl_memory_texsubimage (GstGLMemory * gl_mem, gpointer read_pointer)
{
GstGLContext *context = gl_mem->mem.context;
const GstGLFuncs *gl;
GLenum gl_format, gl_type, gl_target;
gpointer data;
gsize plane_start;
if (!GST_MEMORY_FLAG_IS_SET (gl_mem, GST_GL_BASE_MEMORY_TRANSFER_NEED_UPLOAD))
return;
gl = context->gl_vtable;
gl_type = GL_UNSIGNED_BYTE;
if (gl_mem->tex_type == GST_VIDEO_GL_TEXTURE_TYPE_RGB16)
gl_type = GL_UNSIGNED_SHORT_5_6_5;
gl_format = gst_gl_format_from_gl_texture_type (gl_mem->tex_type);
gl_target = gst_gl_texture_target_to_gl (gl_mem->tex_target);
if (USING_OPENGL (context) || USING_GLES3 (context)
|| USING_OPENGL3 (context)) {
gl->PixelStorei (GL_UNPACK_ROW_LENGTH, gl_mem->unpack_length);
} else if (USING_GLES2 (context)) {
gl->PixelStorei (GL_UNPACK_ALIGNMENT, gl_mem->unpack_length);
}
GST_CAT_LOG (GST_CAT_GL_MEMORY, "upload for texture id:%u, %ux%u",
gl_mem->tex_id, gl_mem->tex_width, GL_MEM_HEIGHT (gl_mem));
/* find the start of the plane data including padding */
plane_start =
gst_gl_get_plane_start (&gl_mem->info, &gl_mem->valign,
gl_mem->plane) + gl_mem->mem.mem.offset;
data = (gpointer) ((gintptr) plane_start + (gintptr) read_pointer);
gl->BindTexture (gl_target, gl_mem->tex_id);
gst_gl_query_start_log (GST_GL_BASE_MEMORY_CAST (gl_mem)->query,
GST_CAT_GL_MEMORY, GST_LEVEL_LOG, NULL, "%s", "glTexSubImage took");
gl->TexSubImage2D (gl_target, 0, 0, 0, gl_mem->tex_width,
GL_MEM_HEIGHT (gl_mem), gl_format, gl_type, data);
gst_gl_query_end (GST_GL_BASE_MEMORY_CAST (gl_mem)->query);
/* Reset to default values */
if (USING_OPENGL (context) || USING_GLES3 (context)) {
gl->PixelStorei (GL_UNPACK_ROW_LENGTH, 0);
} else if (USING_GLES2 (context)) {
gl->PixelStorei (GL_UNPACK_ALIGNMENT, 4);
}
gl->BindTexture (gl_target, 0);
}
static gpointer
_default_gl_tex_map (GstGLMemory * gl_mem, GstMapInfo * info, gsize size)
{
if ((info->flags & GST_MAP_GL) == GST_MAP_GL) {
_upload_cpu_write (gl_mem, info, size);
return &gl_mem->tex_id;
} else {
return _gl_tex_map_cpu_access (gl_mem, info, size);
}
}
static gpointer
_gl_tex_map (GstGLMemory * gl_mem, GstMapInfo * info, gsize maxsize)
{
GstGLMemoryAllocatorClass *alloc_class;
gpointer data;
alloc_class = GST_GL_MEMORY_ALLOCATOR_GET_CLASS (gl_mem->mem.mem.allocator);
if ((info->flags & GST_MAP_GL) == GST_MAP_GL) {
if (gl_mem->tex_target == GST_GL_TEXTURE_TARGET_EXTERNAL_OES)
return &gl_mem->tex_id;
} else { /* not GL */
if (gl_mem->tex_target == GST_GL_TEXTURE_TARGET_EXTERNAL_OES) {
GST_CAT_ERROR (GST_CAT_GL_MEMORY, "Cannot map External OES textures");
return NULL;
}
}
g_return_val_if_fail (alloc_class->map != NULL, NULL);
data = alloc_class->map (GST_GL_BASE_MEMORY_CAST (gl_mem), info, maxsize);
return data;
}
static void
_default_gl_tex_unmap (GstGLMemory * gl_mem, GstMapInfo * info)
{
}
static void
_gl_tex_unmap (GstGLMemory * gl_mem, GstMapInfo * info)
{
GstGLMemoryAllocatorClass *alloc_class;
alloc_class = GST_GL_MEMORY_ALLOCATOR_GET_CLASS (gl_mem->mem.mem.allocator);
g_return_if_fail (alloc_class->unmap != NULL);
alloc_class->unmap (GST_GL_BASE_MEMORY_CAST (gl_mem), info);
}
/**
* gst_gl_memory_copy_texiamge:
* @gl_mem: the source #GstGLMemory
* @tex_id: the destination texture id
* @out_target: the destination #GstGLTextureTarget
* @out_tex_type: the destination #GstVideoGLTextureType
* @out_width: the destination width
* @out_height: the destination height
*
* Copies the texture in #GstGLMemory into the texture specified by @tex_id,
* @out_target, @out_tex_type, @out_width and @out_height.
*
* Returns: whether the copy succeeded.
*
* Since: 1.8
*/
gboolean
gst_gl_memory_copy_teximage (GstGLMemory * src, guint tex_id,
GstGLTextureTarget out_target, GstVideoGLTextureType out_tex_type,
gint out_width, gint out_height)
{
const GstGLFuncs *gl;
guint out_gl_format, out_tex_target;
GstMapInfo sinfo;
guint src_tex_id;
guint fbo;
gl = src->mem.context->gl_vtable;
out_tex_target = gst_gl_texture_target_to_gl (out_target);
out_gl_format = gst_gl_format_from_gl_texture_type (out_tex_type);
if (!gl->GenFramebuffers) {
GST_CAT_ERROR (GST_CAT_GL_MEMORY, "Framebuffer objects not supported");
goto error;
}
if (!gst_memory_map (GST_MEMORY_CAST (src), &sinfo,
GST_MAP_READ | GST_MAP_GL)) {
GST_CAT_ERROR (GST_CAT_GL_MEMORY,
"Failed to map source memory for copying");
goto error;
}
src_tex_id = *(guint *) sinfo.data;
GST_CAT_LOG (GST_CAT_GL_MEMORY, "copying memory %p, tex %u into "
"texture %i", src, src_tex_id, tex_id);
/* FIXME: try and avoid creating and destroying fbo's every copy... */
/* create a framebuffer object */
gl->GenFramebuffers (1, &fbo);
gl->BindFramebuffer (GL_FRAMEBUFFER, fbo);
gl->FramebufferTexture2D (GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
gst_gl_texture_target_to_gl (src->tex_target), src_tex_id, 0);
// if (!gst_gl_context_check_framebuffer_status (src->context))
// goto fbo_error;
gl->BindTexture (out_tex_target, tex_id);
gst_gl_query_start_log (GST_GL_BASE_MEMORY_CAST (src)->query,
GST_CAT_GL_MEMORY, GST_LEVEL_LOG, NULL, "%s", "CopyTexImage2D took");
gl->CopyTexImage2D (out_tex_target, 0, out_gl_format, 0, 0, out_width,
out_height, 0);
gst_gl_query_end (GST_GL_BASE_MEMORY_CAST (src)->query);
gl->BindTexture (out_tex_target, 0);
gl->BindFramebuffer (GL_FRAMEBUFFER, 0);
gl->DeleteFramebuffers (1, &fbo);
gst_memory_unmap (GST_MEMORY_CAST (src), &sinfo);
return TRUE;
error:
return FALSE;
}
static void
_gl_tex_copy_thread (GstGLContext * context, gpointer data)
{
GstGLMemoryCopyParams *copy_params;
copy_params = (GstGLMemoryCopyParams *) data;
if (!copy_params->tex_id) {
guint internal_format, out_gl_format, out_gl_type, out_tex_target;
out_tex_target = gst_gl_texture_target_to_gl (copy_params->tex_target);
out_gl_format =
gst_gl_format_from_gl_texture_type (copy_params->src->tex_type);
out_gl_type = GL_UNSIGNED_BYTE;
if (copy_params->out_format == GST_VIDEO_GL_TEXTURE_TYPE_RGB16)
out_gl_type = GL_UNSIGNED_SHORT_5_6_5;
internal_format =
gst_gl_sized_gl_format_from_gl_format_type (context, out_gl_format,
out_gl_type);
copy_params->tex_id =
_new_texture (context, out_tex_target,
internal_format, out_gl_format, out_gl_type, copy_params->out_width,
copy_params->out_height);
}
copy_params->result = gst_gl_memory_copy_teximage (copy_params->src,
copy_params->tex_id, copy_params->tex_target, copy_params->tex_type,
copy_params->out_width, copy_params->out_height);
}
static GstMemory *
_default_gl_tex_copy (GstGLMemory * src, gssize offset, gssize size)
{
GstAllocationParams params = { 0, GST_MEMORY_CAST (src)->align, 0, 0 };
GstGLBaseMemoryAllocator *base_mem_allocator;
GstAllocator *allocator;
GstGLMemory *dest = NULL;
allocator = GST_MEMORY_CAST (src)->allocator;
base_mem_allocator = (GstGLBaseMemoryAllocator *) allocator;
if (src->tex_target == GST_GL_TEXTURE_TARGET_EXTERNAL_OES) {
GST_CAT_ERROR (GST_CAT_GL_MEMORY, "Cannot copy External OES textures");
return NULL;
}
/* If not doing a full copy, then copy to sysmem, the 2D represention of the
* texture would become wrong */
if (offset > 0 || size < GST_MEMORY_CAST (src)->size) {
return base_mem_allocator->fallback_mem_copy (GST_MEMORY_CAST (src), offset,
size);
}
dest = g_new0 (GstGLMemory, 1);
gst_gl_memory_init (dest, allocator, NULL, src->mem.context, src->tex_target,
&params, &src->info, src->plane, &src->valign, NULL, NULL);
if (GST_MEMORY_FLAG_IS_SET (src, GST_GL_BASE_MEMORY_TRANSFER_NEED_UPLOAD)) {
if (!gst_gl_base_memory_memcpy ((GstGLBaseMemory *) src,
(GstGLBaseMemory *) dest, offset, size)) {
GST_CAT_WARNING (GST_CAT_GL_MEMORY, "Could not copy GL Memory");
gst_memory_unref (GST_MEMORY_CAST (dest));
return NULL;
}
} else {
GstMapInfo dinfo;
if (!gst_memory_map (GST_MEMORY_CAST (dest), &dinfo,
GST_MAP_WRITE | GST_MAP_GL)) {
GST_CAT_WARNING (GST_CAT_GL_MEMORY,
"Failed not map destination " "for writing");
gst_memory_unref (GST_MEMORY_CAST (dest));
return NULL;
}
if (!gst_gl_memory_copy_into ((GstGLMemory *) src,
((GstGLMemory *) dest)->tex_id, src->tex_target,
src->tex_type, src->tex_width, GL_MEM_HEIGHT (src))) {
GST_CAT_WARNING (GST_CAT_GL_MEMORY, "Could not copy GL Memory");
gst_memory_unmap (GST_MEMORY_CAST (dest), &dinfo);
gst_memory_unref (GST_MEMORY_CAST (dest));
return NULL;
}
gst_memory_unmap (GST_MEMORY_CAST (dest), &dinfo);
}
return (GstMemory *) dest;
}
static GstMemory *
_gl_tex_copy (GstGLMemory * src, gssize offset, gssize size)
{
GstGLMemoryAllocatorClass *alloc_class;
alloc_class = GST_GL_MEMORY_ALLOCATOR_GET_CLASS (src->mem.mem.allocator);
if (src->tex_target == GST_GL_TEXTURE_TARGET_EXTERNAL_OES) {
GST_CAT_ERROR (GST_CAT_GL_MEMORY, "Cannot copy External OES textures");
return NULL;
}
g_return_val_if_fail (alloc_class->copy, NULL);
return (GstMemory *) alloc_class->copy (GST_GL_BASE_MEMORY_CAST (src), offset,
size);
}
static GstMemory *
_gl_tex_alloc (GstAllocator * allocator, gsize size,
GstAllocationParams * params)
{
g_warning ("Use gst_gl_base_memory_alloc to allocate from this allocator");
return NULL;
}
static void
_gl_tex_destroy (GstGLMemory * gl_mem)
{
const GstGLFuncs *gl = gl_mem->mem.context->gl_vtable;
if (gl_mem->tex_id && !gl_mem->texture_wrapped)
gl->DeleteTextures (1, &gl_mem->tex_id);
}
static GstGLMemory *
_default_gl_tex_alloc (GstGLMemoryAllocator * allocator,
GstGLVideoAllocationParams * params)
{
guint alloc_flags = params->parent.alloc_flags;
GstGLMemory *mem;
g_return_val_if_fail (alloc_flags & GST_GL_ALLOCATION_PARAMS_ALLOC_FLAG_VIDEO,
NULL);
mem = g_new0 (GstGLMemory, 1);
if (alloc_flags & GST_GL_ALLOCATION_PARAMS_ALLOC_FLAG_WRAP_GPU_HANDLE) {
mem->tex_id = params->parent.gl_handle;
mem->texture_wrapped = TRUE;
}
gst_gl_memory_init (mem, GST_ALLOCATOR_CAST (allocator), NULL,
params->parent.context, params->target, params->parent.alloc_params,
params->v_info, params->plane, params->valign, params->parent.user_data,
params->parent.notify);
if (alloc_flags & GST_GL_ALLOCATION_PARAMS_ALLOC_FLAG_WRAP_GPU_HANDLE) {
GST_MINI_OBJECT_FLAG_SET (mem, GST_GL_BASE_MEMORY_TRANSFER_NEED_DOWNLOAD);
}
if (alloc_flags & GST_GL_ALLOCATION_PARAMS_ALLOC_FLAG_WRAP_SYSMEM) {
mem->mem.data = params->parent.wrapped_data;
GST_MINI_OBJECT_FLAG_SET (mem, GST_GL_BASE_MEMORY_TRANSFER_NEED_UPLOAD);
}
return mem;
}
static void
gst_gl_memory_allocator_class_init (GstGLMemoryAllocatorClass * klass)
{
GstGLBaseMemoryAllocatorClass *gl_base;
GstAllocatorClass *allocator_class;
gl_base = (GstGLBaseMemoryAllocatorClass *) klass;
allocator_class = (GstAllocatorClass *) klass;
klass->map = (GstGLBaseMemoryAllocatorMapFunction) _default_gl_tex_map;
klass->unmap = (GstGLBaseMemoryAllocatorUnmapFunction) _default_gl_tex_unmap;
klass->copy = (GstGLBaseMemoryAllocatorCopyFunction) _default_gl_tex_copy;
gl_base->alloc =
(GstGLBaseMemoryAllocatorAllocFunction) _default_gl_tex_alloc;
gl_base->create = (GstGLBaseMemoryAllocatorCreateFunction) _gl_tex_create;
gl_base->map = (GstGLBaseMemoryAllocatorMapFunction) _gl_tex_map;
gl_base->unmap = (GstGLBaseMemoryAllocatorUnmapFunction) _gl_tex_unmap;
gl_base->copy = (GstGLBaseMemoryAllocatorCopyFunction) _gl_tex_copy;
gl_base->destroy = (GstGLBaseMemoryAllocatorDestroyFunction) _gl_tex_destroy;
allocator_class->alloc = _gl_tex_alloc;
}
static void
gst_gl_memory_allocator_init (GstGLMemoryAllocator * allocator)
{
GstAllocator *alloc = GST_ALLOCATOR_CAST (allocator);
alloc->mem_type = GST_GL_MEMORY_ALLOCATOR_NAME;
GST_OBJECT_FLAG_SET (allocator, GST_ALLOCATOR_FLAG_CUSTOM_ALLOC);
}
/**
* gst_gl_memory_copy_into:
* @gl_mem:a #GstGLMemory
* @tex_id:OpenGL texture id
* @target: the #GstGLTextureTarget
* @tex_type: the #GstVideoGLTextureType
* @width: width of @tex_id
* @height: height of @tex_id
*
* Copies @gl_mem into the texture specfified by @tex_id. The format of @tex_id
* is specified by @tex_type, @width and @height.
*
* Returns: Whether the copy suceeded
*
* Since: 1.8
*/
gboolean
gst_gl_memory_copy_into (GstGLMemory * gl_mem, guint tex_id,
GstGLTextureTarget target, GstVideoGLTextureType tex_type, gint width,
gint height)
{
GstGLMemoryCopyParams copy_params;
copy_params.src = gl_mem;
copy_params.tex_id = tex_id;
copy_params.tex_target = target;
copy_params.tex_type = tex_type;
copy_params.out_width = width;
copy_params.out_height = height;
gst_gl_context_thread_add (gl_mem->mem.context, _gl_tex_copy_thread,
&copy_params);
return copy_params.result;
}
/**
* gst_gl_memory_get_texture_width:
* @gl_mem: a #GstGLMemory
*
* Returns: the texture width of @gl_mem
*
* Since: 1.8
*/
gint
gst_gl_memory_get_texture_width (GstGLMemory * gl_mem)
{
g_return_val_if_fail (gst_is_gl_memory ((GstMemory *) gl_mem), 0);
return gl_mem->tex_width;
}
/**
* gst_gl_memory_get_texture_height:
* @gl_mem: a #GstGLMemory
*
* Returns: the texture height of @gl_mem
*
* Since: 1.8
*/
gint
gst_gl_memory_get_texture_height (GstGLMemory * gl_mem)
{
g_return_val_if_fail (gst_is_gl_memory ((GstMemory *) gl_mem), 0);
return _get_plane_height (&gl_mem->info, gl_mem->plane);
}
/**
* gst_gl_memory_get_texture_type:
* @gl_mem: a #GstGLMemory
*
* Returns: the #GstVideoGLTextureType of @gl_mem
*
* Since: 1.8
*/
GstVideoGLTextureType
gst_gl_memory_get_texture_type (GstGLMemory * gl_mem)
{
g_return_val_if_fail (gst_is_gl_memory ((GstMemory *) gl_mem), 0);
return gl_mem->tex_type;
}
/**
* gst_gl_memory_get_texture_target:
* @gl_mem: a #GstGLMemory
*
* Returns: the #GstGLTextureTarget of @gl_mem
*
* Since: 1.8
*/
GstGLTextureTarget
gst_gl_memory_get_texture_target (GstGLMemory * gl_mem)
{
g_return_val_if_fail (gst_is_gl_memory ((GstMemory *) gl_mem), 0);
return gl_mem->tex_target;
}
/**
* gst_gl_memory_get_texture_id:
* @gl_mem: a #GstGLMemory
*
* Returns: the OpenGL texture handle of @gl_mem
*
* Since: 1.8
*/
guint
gst_gl_memory_get_texture_id (GstGLMemory * gl_mem)
{
g_return_val_if_fail (gst_is_gl_memory ((GstMemory *) gl_mem), 0);
return gl_mem->tex_id;
}
/**
* gst_gl_memory_init_once:
*
* Initializes the GL Base Texture allocator. It is safe to call this function
* multiple times. This must be called before any other GstGLMemory operation.
*
* Since: 1.4
*/
void
gst_gl_memory_init_once (void)
{
static volatile gsize _init = 0;
if (g_once_init_enter (&_init)) {
gst_gl_base_memory_init_once ();
GST_DEBUG_CATEGORY_INIT (GST_CAT_GL_MEMORY, "glbasetexture", 0,
"OpenGL Base Texture Memory");
_gl_memory_allocator = g_object_new (GST_TYPE_GL_MEMORY_ALLOCATOR, NULL);
gst_allocator_register (GST_GL_MEMORY_ALLOCATOR_NAME, _gl_memory_allocator);
g_once_init_leave (&_init, 1);
}
}
/**
* gst_is_gl_memory:
* @mem:a #GstMemory
*
* Returns: whether the memory at @mem is a #GstGLMemory
*
* Since: 1.4
*/
gboolean
gst_is_gl_memory (GstMemory * mem)
{
return mem != NULL && mem->allocator != NULL
&& g_type_is_a (G_OBJECT_TYPE (mem->allocator),
GST_TYPE_GL_MEMORY_ALLOCATOR);
}
static void
_gst_gl_video_allocation_params_set_video_alignment (GstGLVideoAllocationParams
* params, GstVideoAlignment * valign)
{
g_return_if_fail (params != NULL);
if (!params->valign)
params->valign = g_new0 (GstVideoAlignment, 1);
if (valign) {
*params->valign = *valign;
} else {
gst_video_alignment_reset (params->valign);
}
}
/**
* gst_gl_video_allocation_params_init_full:
* @params: a #GstGLVideoAllocationParams to initialize
* @struct_size: the size of the struct in @params
* @alloc_flags: some allocation flags
* @copy: a copy function
* @free: a free function
* @context: a #GstGLContext
* @alloc_params: (allow-none): the #GstAllocationParams for @wrapped_data
* @v_info: the #GstVideoInfo for @wrapped_data
* @plane: the video plane @wrapped_data represents
* @valign: (allow-none): any #GstVideoAlignment applied to symem mappings of @wrapped_data
* @target: the #GstGLTextureTarget
* @wrapped_data: (allow-none): the optional data pointer to wrap
* @gl_handle: the optional OpenGL handle to wrap or 0
* @user_data: (allow-none): user data to call @notify with
* @notify: (allow-none): a #GDestroyNotify
*
* Intended for subclass usage
*
* Returns: initializes @params with the parameters specified
*
* Since: 1.8
*/
gboolean
gst_gl_video_allocation_params_init_full (GstGLVideoAllocationParams * params,
gsize struct_size, guint alloc_flags, GstGLAllocationParamsCopyFunc copy,
GstGLAllocationParamsFreeFunc free, GstGLContext * context,
GstAllocationParams * alloc_params, GstVideoInfo * v_info,
guint plane, GstVideoAlignment * valign, GstGLTextureTarget target,
gpointer wrapped_data, guint gl_handle, gpointer user_data,
GDestroyNotify notify)
{
guint i;
g_return_val_if_fail (params != NULL, FALSE);
g_return_val_if_fail (copy != NULL, FALSE);
g_return_val_if_fail (free != NULL, FALSE);
g_return_val_if_fail (GST_IS_GL_CONTEXT (context), FALSE);
g_return_val_if_fail (v_info != NULL, FALSE);
memset (params, 0, sizeof (*params));
if (!gst_gl_allocation_params_init ((GstGLAllocationParams *) params,
struct_size, alloc_flags, copy, free, context, 0, alloc_params,
wrapped_data, gl_handle, user_data, notify))
return FALSE;
params->v_info = g_new0 (GstVideoInfo, 1);
*params->v_info = *v_info;
for (i = 0; i < GST_VIDEO_MAX_PLANES; i++) {
params->v_info->offset[i] = v_info->offset[i];
params->v_info->stride[i] = v_info->stride[i];
}
_gst_gl_video_allocation_params_set_video_alignment (params, valign);
params->target = target;
params->plane = plane;
return TRUE;
}
/**
* gst_gl_video_allocation_params_new:
* @context: a #GstGLContext
* @alloc_params: (allow-none): the #GstAllocationParams for @wrapped_data
* @v_info: the #GstVideoInfo for @wrapped_data
* @plane: the video plane @wrapped_data represents
* @valign: (allow-none): any #GstVideoAlignment applied to symem mappings of @wrapped_data
* @target: the #GstGLTextureTarget for @wrapped_data
*
* Returns: a new #GstGLVideoAllocationParams for allocating #GstGLMemory's
*
* Since: 1.8
*/
GstGLVideoAllocationParams *
gst_gl_video_allocation_params_new (GstGLContext * context,
GstAllocationParams * alloc_params, GstVideoInfo * v_info, guint plane,
GstVideoAlignment * valign, GstGLTextureTarget target)
{
GstGLVideoAllocationParams *params = g_new0 (GstGLVideoAllocationParams, 1);
if (!gst_gl_video_allocation_params_init_full (params,
sizeof (GstGLVideoAllocationParams),
GST_GL_ALLOCATION_PARAMS_ALLOC_FLAG_ALLOC |
GST_GL_ALLOCATION_PARAMS_ALLOC_FLAG_VIDEO,
(GstGLAllocationParamsCopyFunc)
gst_gl_video_allocation_params_copy_data,
(GstGLAllocationParamsFreeFunc)
gst_gl_video_allocation_params_free_data, context, alloc_params,
v_info, plane, valign, target, NULL, 0, NULL, NULL)) {
g_free (params);
return NULL;
}
return params;
}
/**
* gst_gl_video_allocation_params_new_wrapped_data:
* @context: a #GstGLContext
* @alloc_params: (allow-none): the #GstAllocationParams for @wrapped_data
* @v_info: the #GstVideoInfo for @wrapped_data
* @plane: the video plane @wrapped_data represents
* @valign: (allow-none): any #GstVideoAlignment applied to symem mappings of @wrapped_data
* @target: the #GstGLTextureTarget for @wrapped_data
* @wrapped_data: the data pointer to wrap
* @user_data: (allow-none): user data to call @notify with
* @notify: (allow-none): a #GDestroyNotify
*
* Returns: a new #GstGLVideoAllocationParams for wrapping @wrapped_data
*
* Since: 1.8
*/
GstGLVideoAllocationParams *
gst_gl_video_allocation_params_new_wrapped_data (GstGLContext * context,
GstAllocationParams * alloc_params, GstVideoInfo * v_info, guint plane,
GstVideoAlignment * valign, GstGLTextureTarget target,
gpointer wrapped_data, gpointer user_data, GDestroyNotify notify)
{
GstGLVideoAllocationParams *params = g_new0 (GstGLVideoAllocationParams, 1);
if (!gst_gl_video_allocation_params_init_full (params,
sizeof (GstGLVideoAllocationParams),
GST_GL_ALLOCATION_PARAMS_ALLOC_FLAG_WRAP_SYSMEM |
GST_GL_ALLOCATION_PARAMS_ALLOC_FLAG_VIDEO,
(GstGLAllocationParamsCopyFunc)
gst_gl_video_allocation_params_copy_data,
(GstGLAllocationParamsFreeFunc)
gst_gl_video_allocation_params_free_data, context, alloc_params,
v_info, plane, valign, target, wrapped_data, 0, user_data, notify)) {
g_free (params);
return NULL;
}
return params;
}
/**
* gst_gl_video_allocation_params_new_wrapped_texture:
* @context: a #GstGLContext
* @alloc_params: (allow-none): the #GstAllocationParams for @tex_id
* @v_info: the #GstVideoInfo for @tex_id
* @plane: the video plane @tex_id represents
* @valign: (allow-none): any #GstVideoAlignment applied to symem mappings of @tex_id
* @target: the #GstGLTextureTarget for @tex_id
* @tex_id: the GL texture to wrap
* @user_data: (allow-none): user data to call @notify with
* @notify: (allow-none): a #GDestroyNotify
*
* Returns: a new #GstGLVideoAllocationParams for wrapping @tex_id
*
* Since: 1.8
*/
GstGLVideoAllocationParams *
gst_gl_video_allocation_params_new_wrapped_texture (GstGLContext * context,
GstAllocationParams * alloc_params, GstVideoInfo * v_info, guint plane,
GstVideoAlignment * valign, GstGLTextureTarget target,
guint tex_id, gpointer user_data, GDestroyNotify notify)
{
GstGLVideoAllocationParams *params = g_new0 (GstGLVideoAllocationParams, 1);
if (!gst_gl_video_allocation_params_init_full (params,
sizeof (GstGLVideoAllocationParams),
GST_GL_ALLOCATION_PARAMS_ALLOC_FLAG_WRAP_GPU_HANDLE |
GST_GL_ALLOCATION_PARAMS_ALLOC_FLAG_VIDEO,
(GstGLAllocationParamsCopyFunc)
gst_gl_video_allocation_params_copy_data,
(GstGLAllocationParamsFreeFunc)
gst_gl_video_allocation_params_free_data, context, alloc_params,
v_info, plane, valign, target, NULL, tex_id, user_data, notify)) {
g_free (params);
return NULL;
}
return params;
}
/**
* gst_gl_video_allocation_params_free_data:
* @params: a #GstGLVideoAllocationParams
*
* Unset and free any dynamically allocated resources. Intended for subclass
* usage only to chain up at the end of a subclass free function.
*
* Since: 1.8
*/
void
gst_gl_video_allocation_params_free_data (GstGLVideoAllocationParams * params)
{
g_free (params->v_info);
g_free (params->valign);
gst_gl_allocation_params_free_data (&params->parent);
}
/**
* gst_gl_video_allocation_params_copy_data:
* @src_vid: source #GstGLVideoAllocationParams to copy from
* @dest_vid: destination #GstGLVideoAllocationParams to copy into
*
* Copy and set any dynamically allocated resources in @dest_vid. Intended
* for subclass usage only to chain up at the end of a subclass copy function.
*
* Since: 1.8
*/
void
gst_gl_video_allocation_params_copy_data (GstGLVideoAllocationParams * src_vid,
GstGLVideoAllocationParams * dest_vid)
{
GstGLAllocationParams *src = (GstGLAllocationParams *) src_vid;
GstGLAllocationParams *dest = (GstGLAllocationParams *) dest_vid;
guint i;
gst_gl_allocation_params_copy_data (src, dest);
dest_vid->v_info = g_new0 (GstVideoInfo, 1);
*dest_vid->v_info = *src_vid->v_info;
for (i = 0; i < GST_VIDEO_MAX_PLANES; i++) {
dest_vid->v_info->offset[i] = src_vid->v_info->offset[i];
dest_vid->v_info->stride[i] = src_vid->v_info->stride[i];
}
_gst_gl_video_allocation_params_set_video_alignment (dest_vid,
src_vid->valign);
dest_vid->target = src_vid->target;
dest_vid->plane = src_vid->plane;
}
/**
* gst_gl_memory_setup_buffer:
* @allocator: the @GstGLMemoryAllocator to allocate from
* @buffer: a #GstBuffer to setup
* @params: the #GstGLVideoAllocationParams to allocate with
*
* Returns: whether the buffer was correctly setup
*
* Since: 1.8
*/
gboolean
gst_gl_memory_setup_buffer (GstGLMemoryAllocator * allocator,
GstBuffer * buffer, GstGLVideoAllocationParams * params)
{
GstGLBaseMemoryAllocator *base_allocator;
guint n_mem, i, v, views;
guint alloc_flags = params->parent.alloc_flags;
g_return_val_if_fail (params != NULL, FALSE);
g_return_val_if_fail ((alloc_flags &
GST_GL_ALLOCATION_PARAMS_ALLOC_FLAG_WRAP_SYSMEM)
== 0, FALSE);
g_return_val_if_fail ((params->parent.alloc_flags &
GST_GL_ALLOCATION_PARAMS_ALLOC_FLAG_WRAP_GPU_HANDLE) == 0, FALSE);
g_return_val_if_fail (alloc_flags & GST_GL_ALLOCATION_PARAMS_ALLOC_FLAG_VIDEO,
FALSE);
base_allocator = GST_GL_BASE_MEMORY_ALLOCATOR (allocator);
n_mem = GST_VIDEO_INFO_N_PLANES (params->v_info);
if (GST_VIDEO_INFO_MULTIVIEW_MODE (params->v_info) ==
GST_VIDEO_MULTIVIEW_MODE_SEPARATED)
views = params->v_info->views;
else
views = 1;
for (v = 0; v < views; v++) {
for (i = 0; i < n_mem; i++) {
GstGLMemory *gl_mem;
params->plane = i;
if (!(gl_mem = (GstGLMemory *) gst_gl_base_memory_alloc (base_allocator,
(GstGLAllocationParams *) params)))
return FALSE;
gst_buffer_append_memory (buffer, (GstMemory *) gl_mem);
}
gst_buffer_add_video_meta_full (buffer, v,
GST_VIDEO_INFO_FORMAT (params->v_info),
GST_VIDEO_INFO_WIDTH (params->v_info),
GST_VIDEO_INFO_HEIGHT (params->v_info), n_mem, params->v_info->offset,
params->v_info->stride);
}
return TRUE;
}
/**
* gst_gl_memory_allocator_get_default:
* @context: a #GstGLContext
*
* Returns: the default #GstGLMemoryAllocator supported by @context
*
* Since: 1.8
*/
GstGLMemoryAllocator *
gst_gl_memory_allocator_get_default (GstGLContext * context)
{
GstGLMemoryAllocator *allocator = NULL;
g_return_val_if_fail (GST_IS_GL_CONTEXT (context), NULL);
/* we can only use the pbo allocator with GL > 3.0 contexts */
if (gst_gl_context_check_gl_version (context,
GST_GL_API_OPENGL | GST_GL_API_OPENGL3 | GST_GL_API_GLES2, 3, 0)) {
allocator = (GstGLMemoryAllocator *)
gst_allocator_find (GST_GL_MEMORY_PBO_ALLOCATOR_NAME);
} else {
allocator = (GstGLMemoryAllocator *)
gst_allocator_find (GST_GL_MEMORY_ALLOCATOR_NAME);
}
return allocator;
}
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