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gstreamer/gst-libs/gst/gl/gstglmemory.c
Matthew Waters a9cf8476ea glmemory: unset GL_UNPACK_ROW_LENGTH in opengl3 
If the user uploads their own texture without setting the unpack length, then
then the result will have the appearance of stride mismanagement due to
an incorrect row length.
2016-03-17 22:56:05 +11:00

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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)
|| USING_OPENGL3 (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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