gst_gl_memory_init ()

void
gst_gl_memory_init (void);

Initializes the GL Memory allocator. It is safe to call this function multiple times. This must be called before any other GstGLMemory operation.

gst_gl_memory_alloc ()

GstMemory *
gst_gl_memory_alloc (GstGLContext *context,
                     GstAllocationParams *params,
                     GstVideoInfo *info,
                     guint plane,
                     GstVideoAlignment *valign);

Allocated a new GstGlMemory.

gst_gl_memory_wrapped ()

GstGLMemory *
gst_gl_memory_wrapped (GstGLContext *context,
                       GstVideoInfo *info,
                       guint plane,
                       GstVideoAlignment *valign,
                       gpointer data,
                       gpointer user_data,
                       GDestroyNotify notify);

Wrapped data into a GstGLMemory. This version will account for padding added to the allocation and expressed through valign .

gst_gl_memory_wrapped_texture ()

GstGLMemory *
gst_gl_memory_wrapped_texture (GstGLContext *context,
                               guint texture_id,
                               guint texture_target,
                               GstVideoInfo *info,
                               guint plane,
                               GstVideoAlignment *valign,
                               gpointer user_data,
                               GDestroyNotify notify);

Wraps a texture handle into a GstGLMemory.

gst_gl_memory_copy_into_texture ()

gboolean
gst_gl_memory_copy_into_texture (GstGLMemory *gl_mem,
                                 guint tex_id,
                                 GstVideoGLTextureType tex_type,
                                 gint width,
                                 gint height,
                                 gint stride,
                                 gboolean respecify);

Copies gl_mem into the texture specfified by tex_id . The format of tex_id is specified by tex_type , width and height .

If respecify is TRUE, then the copy is performed in terms of the texture data. This is useful for splitting RGBA textures into RG or R textures or vice versa. The requirement for this to succeed is that the backing texture data must be the same size, i.e. say a RGBA8 texture is converted into a RG8 texture, then the RG texture must have twice as many pixels available for output as the RGBA texture.

Otherwise, if respecify is FALSE, then the copy is performed per texel using glCopyTexImage. See the OpenGL specification for details on the mappings between texture formats.

gst_gl_memory_setup_buffer ()

gboolean
gst_gl_memory_setup_buffer (GstGLContext *context,
                            GstAllocationParams *params,
                            GstVideoInfo *info,
                            GstVideoAlignment *valign,
                            GstBuffer *buffer);

Adds the required GstGLMemorys with the correct configuration to buffer based on info . This version handles padding through valign .

gst_gl_memory_setup_wrapped ()

gboolean
gst_gl_memory_setup_wrapped (GstGLContext *context,
                             GstVideoInfo *info,
                             GstVideoAlignment *valign,
                             gpointer data[GST_VIDEO_MAX_PLANES],
                             GstGLMemory *textures[GST_VIDEO_MAX_PLANES]);

Wraps per plane data pointer in data into the corresponding entry in textures based on info and padding from valign .

gst_gl_texture_type_from_format ()

GstVideoGLTextureType
gst_gl_texture_type_from_format (GstGLContext *context,
                                 GstVideoFormat v_format,
                                 guint plane);

gst_is_gl_memory ()

gboolean
gst_is_gl_memory (GstMemory *mem);

GstGLAllocator

typedef struct _GstGLAllocator GstGLAllocator;

Opaque GstGLAllocator struct

GstGLAllocatorClass

typedef struct {
  GstGLBaseBufferAllocatorClass parent_class;
} GstGLAllocatorClass;

The GstGLAllocatorClass only contains private data

GST_GL_MEMORY_ALLOCATOR

#define GST_GL_MEMORY_ALLOCATOR   "GLMemory"

The name of the GL memory allocator

GstGLMemory

typedef struct {
  GstGLBaseBuffer       mem;

  guint                 tex_id;
  guint                 tex_target;
  GstVideoGLTextureType tex_type;
  GstVideoInfo          info;
  GstVideoAlignment     valign;
  guint                 plane;
  gfloat                tex_scaling[2];
} GstGLMemory;

Represents information about a GL texture