gstreamer/gst-libs/gst/gl/gstglmemory.c
2014-04-02 23:05:47 +11:00

525 lines
14 KiB
C

/*
* GStreamer
* Copyright (C) 2012 Matthew Waters <ystreet00@gmail.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 "gstglmemory.h"
/**
* SECTION:gstglmemory
* @short_description: memory subclass for GL textures
* @see_also: #GstMemory, #GstAllocator, #GstGLBufferPool
*
* GstGLMemory is a #GstMemory subclass providing support for the mapping of
* GL textures.
*
* #GstGLMemory is created through gst_gl_memory_alloc() or system memory can
* be wrapped through gst_gl_memory_wrapped().
*
* Data is uploaded or downloaded from the GPU as is necessary.
*/
#define USING_OPENGL(context) (gst_gl_context_get_gl_api (context) & GST_GL_API_OPENGL)
#define USING_OPENGL3(context) (gst_gl_context_get_gl_api (context) & GST_GL_API_OPENGL3)
#define USING_GLES(context) (gst_gl_context_get_gl_api (context) & GST_GL_API_GLES)
#define USING_GLES2(context) (gst_gl_context_get_gl_api (context) & GST_GL_API_GLES2)
#define USING_GLES3(context) (gst_gl_context_get_gl_api (context) & GST_GL_API_GLES3)
GST_DEBUG_CATEGORY_STATIC (GST_CAT_GL_MEMORY);
#define GST_CAT_DEFUALT GST_CAT_GL_MEMORY
static GstAllocator *_gl_allocator;
typedef struct
{
GstGLMemory *src;
GLuint tex_id;
gboolean result;
} GstGLMemoryCopyParams;
static void
_gl_mem_init (GstGLMemory * mem, GstAllocator * allocator, GstMemory * parent,
GstGLContext * context, GstVideoInfo * v_info, gpointer user_data,
GDestroyNotify notify)
{
gsize maxsize;
maxsize = v_info->size;
gst_memory_init (GST_MEMORY_CAST (mem), GST_MEMORY_FLAG_NO_SHARE,
allocator, parent, maxsize, 0, 0, maxsize);
mem->context = gst_object_ref (context);
mem->gl_format = GL_RGBA;
mem->v_info = *v_info;
mem->notify = notify;
mem->user_data = user_data;
mem->wrapped = FALSE;
mem->upload = gst_gl_upload_new (context);
mem->download = gst_gl_download_new (context);
GST_CAT_DEBUG (GST_CAT_GL_MEMORY, "new GL texture memory:%p format:%u "
"dimensions:%ux%u", mem, GST_VIDEO_INFO_FORMAT (v_info),
GST_VIDEO_INFO_WIDTH (v_info), GST_VIDEO_INFO_HEIGHT (v_info));
}
static GstGLMemory *
_gl_mem_new (GstAllocator * allocator, GstMemory * parent,
GstGLContext * context, GstVideoInfo * v_info, gpointer user_data,
GDestroyNotify notify)
{
GstGLMemory *mem;
GLuint tex_id;
gst_gl_context_gen_texture (context, &tex_id,
GST_VIDEO_INFO_FORMAT (v_info), GST_VIDEO_INFO_WIDTH (v_info),
GST_VIDEO_INFO_HEIGHT (v_info));
if (!tex_id) {
GST_CAT_WARNING (GST_CAT_GL_MEMORY,
"Could not create GL texture with context:%p", context);
}
GST_CAT_TRACE (GST_CAT_GL_MEMORY, "created texture %u", tex_id);
mem = g_slice_alloc (sizeof (GstGLMemory));
_gl_mem_init (mem, allocator, parent, context, v_info, user_data, notify);
mem->tex_id = tex_id;
return mem;
}
static gpointer
_gl_mem_map (GstGLMemory * gl_mem, gsize maxsize, GstMapFlags flags)
{
gpointer data;
g_return_val_if_fail (maxsize == gl_mem->mem.maxsize, NULL);
if ((flags & GST_MAP_GL) == GST_MAP_GL) {
if ((flags & GST_MAP_READ) == GST_MAP_READ) {
GST_CAT_TRACE (GST_CAT_GL_MEMORY, "mapping GL texture:%u for reading",
gl_mem->tex_id);
if (GST_GL_MEMORY_FLAG_IS_SET (gl_mem, GST_GL_MEMORY_FLAG_NEED_UPLOAD)) {
if (!GST_GL_MEMORY_FLAG_IS_SET (gl_mem,
GST_GL_MEMORY_FLAG_UPLOAD_INITTED)) {
if (!gst_gl_upload_init_format (gl_mem->upload, &gl_mem->v_info,
&gl_mem->v_info)) {
goto error;
}
GST_GL_MEMORY_FLAG_SET (gl_mem, GST_GL_MEMORY_FLAG_UPLOAD_INITTED);
}
if (!gst_gl_upload_perform_with_memory (gl_mem->upload, gl_mem)) {
goto error;
}
}
} else {
GST_CAT_TRACE (GST_CAT_GL_MEMORY, "mapping GL texture:%u for writing",
gl_mem->tex_id);
}
data = &gl_mem->tex_id;
} else { /* not GL */
if ((flags & GST_MAP_READ) == GST_MAP_READ) {
GST_CAT_TRACE (GST_CAT_GL_MEMORY,
"mapping GL texture:%u for reading from system memory",
gl_mem->tex_id);
if (GST_GL_MEMORY_FLAG_IS_SET (gl_mem, GST_GL_MEMORY_FLAG_NEED_DOWNLOAD)) {
if (!GST_GL_MEMORY_FLAG_IS_SET (gl_mem,
GST_GL_MEMORY_FLAG_DOWNLOAD_INITTED)) {
if (!gst_gl_download_init_format (gl_mem->download,
GST_VIDEO_INFO_FORMAT (&gl_mem->v_info),
GST_VIDEO_INFO_WIDTH (&gl_mem->v_info),
GST_VIDEO_INFO_HEIGHT (&gl_mem->v_info))) {
goto error;
}
GST_GL_MEMORY_FLAG_SET (gl_mem, GST_GL_MEMORY_FLAG_DOWNLOAD_INITTED);
}
if (!gst_gl_download_perform_with_memory (gl_mem->download, gl_mem)) {
goto error;
}
}
} else {
GST_CAT_TRACE (GST_CAT_GL_MEMORY,
"mapping GL texture:%u for writing to system memory", gl_mem->tex_id);
}
data = gl_mem->data;
}
gl_mem->map_flags = flags;
return data;
error:
{
return NULL;
}
}
static void
_gl_mem_unmap (GstGLMemory * gl_mem)
{
if ((gl_mem->map_flags & GST_MAP_WRITE) == GST_MAP_WRITE) {
if ((gl_mem->map_flags & GST_MAP_GL) == GST_MAP_GL) {
GST_GL_MEMORY_FLAG_SET (gl_mem, GST_GL_MEMORY_FLAG_NEED_DOWNLOAD);
} else {
GST_GL_MEMORY_FLAG_SET (gl_mem, GST_GL_MEMORY_FLAG_NEED_UPLOAD);
}
}
gl_mem->map_flags = 0;
}
static void
_gl_mem_copy_thread (GstGLContext * context, gpointer data)
{
GstGLMemoryCopyParams *copy_params;
GstGLMemory *src;
GLuint tex_id;
GLuint rboId, fboId;
gsize width, height;
GLuint gl_format;
GstVideoFormat v_format;
GstGLFuncs *gl;
copy_params = (GstGLMemoryCopyParams *) data;
src = copy_params->src;
tex_id = copy_params->tex_id;
width = GST_VIDEO_INFO_WIDTH (&src->v_info);
height = GST_VIDEO_INFO_HEIGHT (&src->v_info);
v_format = GST_VIDEO_INFO_FORMAT (&src->v_info);
gl_format = src->gl_format;
gl = src->context->gl_vtable;
if (!gl->GenFramebuffers) {
gst_gl_context_set_error (src->context,
"Context, EXT_framebuffer_object not supported");
goto error;
}
if (!tex_id)
gst_gl_context_gen_texture (src->context, &tex_id, v_format, width, height);
if (!tex_id) {
GST_CAT_WARNING (GST_CAT_GL_MEMORY,
"Could not create GL texture with context:%p", src->context);
}
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, &fboId);
gl->BindFramebuffer (GL_FRAMEBUFFER, fboId);
/* create a renderbuffer object */
gl->GenRenderbuffers (1, &rboId);
gl->BindRenderbuffer (GL_RENDERBUFFER, rboId);
if (USING_OPENGL (src->context)) {
gl->RenderbufferStorage (GL_RENDERBUFFER, GL_DEPTH_COMPONENT, width,
height);
gl->RenderbufferStorage (GL_RENDERBUFFER, GL_DEPTH24_STENCIL8,
width, height);
}
if (USING_GLES2 (src->context)) {
gl->RenderbufferStorage (GL_RENDERBUFFER, GL_DEPTH_COMPONENT16,
width, height);
}
/* attach the renderbuffer to depth attachment point */
gl->FramebufferRenderbuffer (GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
GL_RENDERBUFFER, rboId);
if (USING_OPENGL (src->context)) {
gl->FramebufferRenderbuffer (GL_FRAMEBUFFER,
GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, rboId);
}
gl->FramebufferTexture2D (GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL_TEXTURE_2D, src->tex_id, 0);
/* check FBO status */
if (!gst_gl_context_check_framebuffer_status (src->context))
goto fbo_error;
/* copy tex */
gl->BindTexture (GL_TEXTURE_2D, tex_id);
gl->CopyTexImage2D (GL_TEXTURE_2D, 0, gl_format, 0, 0, width, height, 0);
gl->BindTexture (GL_TEXTURE_2D, 0);
gl->BindFramebuffer (GL_FRAMEBUFFER, 0);
gl->DeleteRenderbuffers (1, &rboId);
gl->DeleteFramebuffers (1, &fboId);
copy_params->tex_id = tex_id;
copy_params->result = TRUE;
return;
/* ERRORS */
fbo_error:
{
gl->DeleteRenderbuffers (1, &rboId);
gl->DeleteFramebuffers (1, &fboId);
copy_params->tex_id = 0;
copy_params->result = FALSE;
return;
}
error:
{
copy_params->result = FALSE;
return;
}
}
static GstMemory *
_gl_mem_copy (GstGLMemory * src, gssize offset, gssize size)
{
GstGLMemory *dest;
GstGLMemoryCopyParams copy_params;
if (GST_GL_MEMORY_FLAG_IS_SET (src, GST_GL_MEMORY_FLAG_NEED_UPLOAD)) {
dest = _gl_mem_new (src->mem.allocator, NULL, src->context, &src->v_info,
NULL, NULL);
dest->data = g_malloc (src->mem.maxsize);
memcpy (dest->data, src->data, src->mem.maxsize);
GST_GL_MEMORY_FLAG_SET (dest, GST_GL_MEMORY_FLAG_NEED_UPLOAD);
} else {
copy_params = (GstGLMemoryCopyParams) {
src, 0,};
gst_gl_context_thread_add (src->context, _gl_mem_copy_thread, &copy_params);
dest = g_slice_alloc (sizeof (GstGLMemory));
_gl_mem_init (dest, src->mem.allocator, NULL, src->context, &src->v_info,
NULL, NULL);
if (!copy_params.result) {
GST_CAT_WARNING (GST_CAT_GL_MEMORY, "Could not copy GL Memory");
gst_memory_unref ((GstMemory *) dest);
return NULL;
}
dest->tex_id = copy_params.tex_id;
dest->data = g_malloc (src->mem.maxsize);
if (dest->data == NULL) {
GST_CAT_WARNING (GST_CAT_GL_MEMORY, "Could not copy GL Memory");
gst_memory_unref ((GstMemory *) dest);
return NULL;
}
GST_GL_MEMORY_FLAG_SET (dest, GST_GL_MEMORY_FLAG_NEED_DOWNLOAD);
}
return (GstMemory *) dest;
}
static GstMemory *
_gl_mem_share (GstGLMemory * mem, gssize offset, gssize size)
{
return NULL;
}
static gboolean
_gl_mem_is_span (GstGLMemory * mem1, GstGLMemory * mem2, gsize * offset)
{
return FALSE;
}
static GstMemory *
_gl_mem_alloc (GstAllocator * allocator, gsize size,
GstAllocationParams * params)
{
g_warning ("use gst_gl_memory_alloc () to allocate from this "
"GstGLMemory allocator");
return NULL;
}
static void
_gl_mem_free (GstAllocator * allocator, GstMemory * mem)
{
GstGLMemory *gl_mem = (GstGLMemory *) mem;
if (gl_mem->tex_id)
gst_gl_context_del_texture (gl_mem->context, &gl_mem->tex_id);
gst_object_unref (gl_mem->upload);
gst_object_unref (gl_mem->download);
gst_object_unref (gl_mem->context);
if (gl_mem->notify)
gl_mem->notify (gl_mem->user_data);
if (gl_mem->data && !gl_mem->wrapped) {
g_free (gl_mem->data);
gl_mem->data = NULL;
}
g_slice_free (GstGLMemory, gl_mem);
}
/**
* gst_gl_memory_copy_into_texture:
* @gl_mem:a #GstGLMemory
* @tex_id:OpenGL texture id
*
* Copies @gl_mem into the texture specfified by @tex_id. This assumes that
* @tex_id has the same dimensions as @gl_mem.
*
* Returns: Whether the copy suceeded
*/
gboolean
gst_gl_memory_copy_into_texture (GstGLMemory * gl_mem, guint tex_id)
{
GstGLMemoryCopyParams copy_params;
copy_params.src = gl_mem;
copy_params.tex_id = tex_id;
gst_gl_context_thread_add (gl_mem->context, _gl_mem_copy_thread,
&copy_params);
return copy_params.result;
}
/**
* gst_gl_memory_alloc:
* @context:a #GstGLContext
* @v_info: the #GstVideoInfo of the memory
*
* Returns: a #GstMemory object with a GL texture specified by @v_info
* from @context
*/
GstMemory *
gst_gl_memory_alloc (GstGLContext * context, GstVideoInfo * v_info)
{
GstGLMemory *mem;
mem = _gl_mem_new (_gl_allocator, NULL, context, v_info, NULL, NULL);
mem->data = g_malloc (mem->mem.maxsize);
if (mem->data == NULL) {
gst_memory_unref ((GstMemory *) mem);
return NULL;
}
return (GstMemory *) mem;
}
/**
* gst_gl_memory_wrapped
* @context:a #GstGLContext
* @v_info: the #GstVideoInfo of the memory and data
* @data: the data to wrap
* @user_data: data called with for @notify
* @notify: function called with @user_data when @data needs to be freed
*
* Returns: a #GstGLMemory object with a GL texture specified by @v_info
* from @context and contents specified by @data
*/
GstGLMemory *
gst_gl_memory_wrapped (GstGLContext * context, GstVideoInfo * v_info,
gpointer data, gpointer user_data, GDestroyNotify notify)
{
GstGLMemory *mem;
mem = _gl_mem_new (_gl_allocator, NULL, context, v_info, user_data, notify);
mem->data = data;
mem->wrapped = TRUE;
GST_GL_MEMORY_FLAG_SET (mem, GST_GL_MEMORY_FLAG_NEED_UPLOAD);
return mem;
}
G_DEFINE_TYPE (GstGLAllocator, gst_gl_allocator, GST_TYPE_ALLOCATOR);
static void
gst_gl_allocator_class_init (GstGLAllocatorClass * klass)
{
GstAllocatorClass *allocator_class;
allocator_class = (GstAllocatorClass *) klass;
allocator_class->alloc = _gl_mem_alloc;
allocator_class->free = _gl_mem_free;
}
static void
gst_gl_allocator_init (GstGLAllocator * allocator)
{
GstAllocator *alloc = GST_ALLOCATOR_CAST (allocator);
alloc->mem_type = GST_GL_MEMORY_ALLOCATOR;
alloc->mem_map = (GstMemoryMapFunction) _gl_mem_map;
alloc->mem_unmap = (GstMemoryUnmapFunction) _gl_mem_unmap;
alloc->mem_copy = (GstMemoryCopyFunction) _gl_mem_copy;
alloc->mem_share = (GstMemoryShareFunction) _gl_mem_share;
alloc->mem_is_span = (GstMemoryIsSpanFunction) _gl_mem_is_span;
}
/**
* gst_gl_memory_init:
*
* Initializes the GL Memory allocator. It is safe to call this function
* multiple times. This must be called before any other GstGLMemory operation.
*/
void
gst_gl_memory_init (void)
{
static volatile gsize _init = 0;
if (g_once_init_enter (&_init)) {
GST_DEBUG_CATEGORY_INIT (GST_CAT_GL_MEMORY, "glmemory", 0, "OpenGL Memory");
_gl_allocator = g_object_new (gst_gl_allocator_get_type (), NULL);
gst_allocator_register (GST_GL_MEMORY_ALLOCATOR,
gst_object_ref (_gl_allocator));
g_once_init_leave (&_init, 1);
}
}
/**
* gst_is_gl_memory:
* @mem:a #GstMemory
*
* Returns: whether the memory at @mem is a #GstGLMemory
*/
gboolean
gst_is_gl_memory (GstMemory * mem)
{
return mem != NULL && mem->allocator == _gl_allocator;
}