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gstreamer/gst-libs/gst/gl/gstglmemory.c
Matthew Waters 598a79a5e2 gl/mem: implement texture copying between formats with strides properly 
Previously, we used the width to determine the amount of data to be
copied using pbos.  This, makes it allocate enough data for the
the strides as well.
2014-05-01 14:00:04 +10:00

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/*
* 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;
/* compatability definitions... */
#ifndef GL_RED
#define GL_RED 0x1903
#endif
#ifndef GL_RG
#define GL_RG 0x8227
#endif
#ifndef GL_PIXEL_PACK_BUFFER
#define GL_PIXEL_PACK_BUFFER 0x88EB
#endif
#ifndef GL_PIXEL_UNPACK_BUFFER
#define GL_PIXEL_UNPACK_BUFFER 0x88EC
#endif
#ifndef GL_STREAM_COPY
#define GL_STREAM_COPY 0x88E2
#endif
typedef struct
{
/* in */
GstGLMemory *src;
GstVideoGLTextureType out_format;
guint out_width, out_height;
guint out_stride;
gboolean respecify;
/* inout */
guint tex_id;
/* out */
gboolean result;
} GstGLMemoryCopyParams;
static inline guint
_gl_format_n_components (guint format)
{
switch (format) {
case GST_VIDEO_GL_TEXTURE_TYPE_RGBA:
case GL_RGBA:
return 4;
case GST_VIDEO_GL_TEXTURE_TYPE_RGB:
case GST_VIDEO_GL_TEXTURE_TYPE_RGB16:
case GL_RGB:
return 3;
case GST_VIDEO_GL_TEXTURE_TYPE_LUMINANCE_ALPHA:
case GST_VIDEO_GL_TEXTURE_TYPE_RG:
case GL_LUMINANCE_ALPHA:
case GL_RG:
return 2;
case GST_VIDEO_GL_TEXTURE_TYPE_LUMINANCE:
case GST_VIDEO_GL_TEXTURE_TYPE_R:
case GL_LUMINANCE:
case GL_RED:
return 1;
default:
return 0;
}
}
static inline guint
_gl_type_n_components (guint type)
{
switch (type) {
case GL_UNSIGNED_BYTE:
return 1;
case GL_UNSIGNED_SHORT_5_6_5:
return 3;
default:
g_assert_not_reached ();
return 0;
}
}
static inline guint
_gl_type_n_bytes (guint type)
{
switch (type) {
case GL_UNSIGNED_BYTE:
return 1;
case GL_UNSIGNED_SHORT_5_6_5:
return 2;
default:
g_assert_not_reached ();
return 0;
}
}
static inline guint
_gl_format_type_n_bytes (guint format, guint type)
{
return _gl_format_n_components (format) / _gl_type_n_components (type) *
_gl_type_n_bytes (type);
}
static inline GLenum
_gst_gl_format_from_gl_texture_type (GstVideoGLTextureType tex_format)
{
switch (tex_format) {
case GST_VIDEO_GL_TEXTURE_TYPE_LUMINANCE_ALPHA:
return GL_LUMINANCE_ALPHA;
case GST_VIDEO_GL_TEXTURE_TYPE_LUMINANCE:
return GL_LUMINANCE;
case GST_VIDEO_GL_TEXTURE_TYPE_RGBA:
return GL_RGBA;
case GST_VIDEO_GL_TEXTURE_TYPE_RGB:
case GST_VIDEO_GL_TEXTURE_TYPE_RGB16:
return GL_RGB;
case GST_VIDEO_GL_TEXTURE_TYPE_RG:
return GL_RG;
case GST_VIDEO_GL_TEXTURE_TYPE_R:
return GL_RED;
default:
return GST_VIDEO_GL_TEXTURE_TYPE_RGBA;
}
}
static inline guint
_gl_texture_type_n_bytes (GstVideoGLTextureType tex_format)
{
guint format, type;
format = _gst_gl_format_from_gl_texture_type (tex_format);
type = GL_UNSIGNED_BYTE;
if (tex_format == GST_VIDEO_GL_TEXTURE_TYPE_RGB16)
type = GL_UNSIGNED_SHORT_5_6_5;
return _gl_format_type_n_bytes (format, type);
}
GstVideoGLTextureType
gst_gl_texture_type_from_format (GstVideoFormat v_format, guint plane)
{
switch (v_format) {
case GST_VIDEO_FORMAT_RGBx:
case GST_VIDEO_FORMAT_BGRx:
case GST_VIDEO_FORMAT_xRGB:
case GST_VIDEO_FORMAT_xBGR:
case GST_VIDEO_FORMAT_RGBA:
case GST_VIDEO_FORMAT_BGRA:
case GST_VIDEO_FORMAT_ARGB:
case GST_VIDEO_FORMAT_ABGR:
case GST_VIDEO_FORMAT_AYUV:
return GST_VIDEO_GL_TEXTURE_TYPE_RGBA;
break;
case GST_VIDEO_FORMAT_RGB:
case GST_VIDEO_FORMAT_BGR:
return GST_VIDEO_GL_TEXTURE_TYPE_RGB;
break;
case GST_VIDEO_FORMAT_GRAY8:
return GST_VIDEO_GL_TEXTURE_TYPE_LUMINANCE;
break;
case GST_VIDEO_FORMAT_GRAY16_BE:
case GST_VIDEO_FORMAT_GRAY16_LE:
return GST_VIDEO_GL_TEXTURE_TYPE_LUMINANCE_ALPHA;
break;
case GST_VIDEO_FORMAT_YUY2:
case GST_VIDEO_FORMAT_UYVY:
return GST_VIDEO_GL_TEXTURE_TYPE_RGBA;
break;
case GST_VIDEO_FORMAT_NV12:
case GST_VIDEO_FORMAT_NV21:
if (plane == 0)
return GST_VIDEO_GL_TEXTURE_TYPE_LUMINANCE;
return GST_VIDEO_GL_TEXTURE_TYPE_LUMINANCE_ALPHA;
break;
case GST_VIDEO_FORMAT_Y444:
case GST_VIDEO_FORMAT_Y42B:
case GST_VIDEO_FORMAT_Y41B:
case GST_VIDEO_FORMAT_I420:
case GST_VIDEO_FORMAT_YV12:
return GST_VIDEO_GL_TEXTURE_TYPE_LUMINANCE;
break;
default:
g_assert_not_reached ();
break;
}
return GST_VIDEO_GL_TEXTURE_TYPE_RGBA;
}
static inline guint
_get_plane_width (GstVideoInfo * info, guint plane)
{
if (GST_VIDEO_INFO_FORMAT (info) == GST_VIDEO_FORMAT_YUY2
|| GST_VIDEO_INFO_FORMAT (info) == GST_VIDEO_FORMAT_UYVY) {
return GST_VIDEO_INFO_COMP_WIDTH (info, 1);
}
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);
}
typedef struct _GenTexture
{
guint width, height;
GLenum gl_format;
GLenum gl_type;
guint result;
} GenTexture;
static void
_generate_texture (GstGLContext * context, GenTexture * data)
{
const GstGLFuncs *gl = context->gl_vtable;
GST_CAT_TRACE (GST_CAT_GL_MEMORY,
"Generating texture format:%u type:%u dimensions:%ux%u", data->gl_format,
data->gl_type, data->width, data->height);
gl->GenTextures (1, &data->result);
gl->BindTexture (GL_TEXTURE_2D, data->result);
gl->TexImage2D (GL_TEXTURE_2D, 0, data->gl_format, data->width,
data->height, 0, data->gl_format, data->gl_type, NULL);
gl->TexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
gl->TexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
gl->TexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
gl->TexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
GST_CAT_LOG (GST_CAT_GL_MEMORY, "generated texture id:%d", data->result);
}
static void
_upload_memory (GstGLContext * context, GstGLMemory * gl_mem)
{
const GstGLFuncs *gl;
GLenum gl_format, gl_type;
if (!GST_GL_MEMORY_FLAG_IS_SET (gl_mem, GST_GL_MEMORY_FLAG_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);
#if GST_GL_HAVE_OPENGL || GST_GL_HAVE_GLES3
if (USING_OPENGL (context) || USING_GLES3 (context)) {
gl->PixelStorei (GL_UNPACK_ROW_LENGTH, gl_mem->unpack_length);
}
#endif
#if GST_GL_HAVE_GLES2
if (USING_GLES2 (context)) {
gl->PixelStorei (GL_UNPACK_ALIGNMENT, gl_mem->unpack_length);
}
#endif
GST_CAT_LOG (GST_CAT_GL_MEMORY, "upload for texture id:%u, %ux%u",
gl_mem->tex_id, gl_mem->width, gl_mem->height);
gl->BindTexture (GL_TEXTURE_2D, gl_mem->tex_id);
gl->TexSubImage2D (GL_TEXTURE_2D, 0, 0, 0, gl_mem->width, gl_mem->height,
gl_format, gl_type, gl_mem->data);
/* Reset to default values */
#if GST_GL_HAVE_OPENGL || GST_GL_HAVE_GLES3
if (USING_OPENGL (context) || USING_GLES3 (context)) {
gl->PixelStorei (GL_UNPACK_ROW_LENGTH, 0);
}
#endif
#if GST_GL_HAVE_GLES2
if (USING_GLES2 (context)) {
gl->PixelStorei (GL_UNPACK_ALIGNMENT, 4);
}
#endif
gl->BindTexture (GL_TEXTURE_2D, 0);
GST_GL_MEMORY_FLAG_UNSET (gl_mem, GST_GL_MEMORY_FLAG_NEED_UPLOAD);
}
static inline void
_calculate_unpack_length (GstGLMemory * gl_mem)
{
guint n_gl_bytes;
gl_mem->tex_scaling[0] = 1.0f;
gl_mem->tex_scaling[1] = 1.0f;
gl_mem->unpack_length = 1;
n_gl_bytes = _gl_texture_type_n_bytes (gl_mem->tex_type);
if (n_gl_bytes == 0) {
GST_CAT_ERROR (GST_CAT_GL_MEMORY, "Unsupported texture type %d",
gl_mem->tex_type);
return;
}
#if GST_GL_HAVE_OPENGL || GST_GL_HAVE_GLES3
if (USING_OPENGL (gl_mem->context) || USING_GLES3 (gl_mem->context)) {
gl_mem->unpack_length = gl_mem->stride / n_gl_bytes;
}
#endif
#if GST_GL_HAVE_GLES2
if (USING_GLES2 (gl_mem->context)) {
guint j = 8;
while (j >= n_gl_bytes) {
/* GST_ROUND_UP_j(gl_mem->width * n_gl_bytes) */
guint round_up_j = ((gl_mem->width * n_gl_bytes) + j - 1) & ~(j - 1);
if (round_up_j == gl_mem->stride) {
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->stride, n_gl_bytes,
j, gl_mem->width, 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) */
guint round_up_j = ((gl_mem->stride) + j - 1) & ~(j - 1);
if (round_up_j == gl_mem->stride) {
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, n_gl_bytes, j,
gl_mem->stride, round_up_j);
gl_mem->unpack_length = j;
gl_mem->tex_scaling[0] =
(gfloat) (gl_mem->width * n_gl_bytes) / (gfloat) gl_mem->stride;
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->stride, n_gl_bytes);
}
}
}
#endif
}
static void
_download_memory (GstGLContext * context, GstGLMemory * gl_mem)
{
const GstGLFuncs *gl;
guint format, type;
GLuint fboId;
gl = context->gl_vtable;
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;
if (!gl->GenFramebuffers) {
gst_gl_context_set_error (context, "Cannot download GL texture "
"without support for Framebuffers");
goto error;
}
if (gst_gl_context_get_gl_api (context) & GST_GL_API_GLES2
&& (gl_mem->tex_type == GST_VIDEO_GL_TEXTURE_TYPE_LUMINANCE
|| gl_mem->tex_type == GST_VIDEO_GL_TEXTURE_TYPE_LUMINANCE_ALPHA)) {
gst_gl_context_set_error (context, "Cannot download GL luminance/"
"luminance alpha textures");
goto error;
}
GST_CAT_LOG (GST_CAT_GL_MEMORY, "downloading memory %p, tex %u into %p",
gl_mem, gl_mem->tex_id, gl_mem->data);
if (gl_mem->tex_type == GST_VIDEO_GL_TEXTURE_TYPE_LUMINANCE
|| gl_mem->tex_type == GST_VIDEO_GL_TEXTURE_TYPE_LUMINANCE_ALPHA) {
gl->BindTexture (GL_TEXTURE_2D, gl_mem->tex_id);
gl->GetTexImage (GL_TEXTURE_2D, 0, format, type, gl_mem->data);
gl->BindTexture (GL_TEXTURE_2D, 0);
} else {
/* FIXME: try and avoid creating and destroying fbo's every download... */
/* create a framebuffer object */
gl->GenFramebuffers (1, &fboId);
gl->BindFramebuffer (GL_FRAMEBUFFER, fboId);
gl->FramebufferTexture2D (GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL_TEXTURE_2D, gl_mem->tex_id, 0);
if (!gst_gl_context_check_framebuffer_status (context))
goto fbo_error;
gl->ReadPixels (0, 0, gl_mem->width, gl_mem->height, format, type,
gl_mem->data);
gl->BindFramebuffer (GL_FRAMEBUFFER, 0);
fbo_error:
gl->DeleteFramebuffers (1, &fboId);
}
error:
return;
}
static void
_gl_mem_init (GstGLMemory * mem, GstAllocator * allocator, GstMemory * parent,
GstGLContext * context, GstVideoGLTextureType tex_type, gint width,
gint height, gint stride, gpointer user_data, GDestroyNotify notify)
{
gsize maxsize;
maxsize = _gl_texture_type_n_bytes (tex_type) * stride * height;
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->tex_type = tex_type;
mem->width = width;
mem->height = height;
mem->stride = stride;
mem->notify = notify;
mem->user_data = user_data;
mem->data_wrapped = FALSE;
mem->texture_wrapped = FALSE;
_calculate_unpack_length (mem);
GST_CAT_DEBUG (GST_CAT_GL_MEMORY, "new GL texture memory:%p format:%u "
"dimensions:%ux%u", mem, tex_type, width, height);
}
static GstGLMemory *
_gl_mem_new (GstAllocator * allocator, GstMemory * parent,
GstGLContext * context, GstVideoGLTextureType tex_type, gint width,
gint height, gint stride, gpointer user_data, GDestroyNotify notify)
{
GstGLMemory *mem;
GenTexture data = { 0, };
data.width = width;
data.height = height;
data.gl_format = _gst_gl_format_from_gl_texture_type (tex_type);
data.gl_type = GL_UNSIGNED_BYTE;
if (tex_type == GST_VIDEO_GL_TEXTURE_TYPE_RGB16)
data.gl_type = GL_UNSIGNED_SHORT_5_6_5;
gst_gl_context_thread_add (context,
(GstGLContextThreadFunc) _generate_texture, &data);
if (!data.result) {
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", data.result);
mem = g_slice_new0 (GstGLMemory);
_gl_mem_init (mem, allocator, parent, context, tex_type, width, height,
stride, user_data, notify);
mem->tex_id = data.result;
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)) {
gst_gl_context_thread_add (gl_mem->context,
(GstGLContextThreadFunc) _upload_memory, gl_mem);
GST_GL_MEMORY_FLAG_UNSET (gl_mem, GST_GL_MEMORY_FLAG_NEED_UPLOAD);
}
} 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)) {
gst_gl_context_thread_add (gl_mem->context,
(GstGLContextThreadFunc) _download_memory, gl_mem);
GST_GL_MEMORY_FLAG_UNSET (gl_mem, GST_GL_MEMORY_FLAG_NEED_DOWNLOAD);
}
} 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;
}
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)
{
const GstGLFuncs *gl;
GstGLMemoryCopyParams *copy_params;
GstGLMemory *src;
guint tex_id;
GLuint fboId;
gsize out_width, out_height, out_stride;
GLuint out_gl_format, out_gl_type;
GLuint in_gl_format, in_gl_type;
gsize in_size, out_size;
copy_params = (GstGLMemoryCopyParams *) data;
src = copy_params->src;
tex_id = copy_params->tex_id;
out_width = copy_params->out_width;
out_height = copy_params->out_height;
out_stride = copy_params->out_stride;
gl = src->context->gl_vtable;
out_gl_format = _gst_gl_format_from_gl_texture_type (copy_params->out_format);
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;
in_gl_format = _gst_gl_format_from_gl_texture_type (src->tex_type);
in_gl_type = GL_UNSIGNED_BYTE;
if (src->tex_type == GST_VIDEO_GL_TEXTURE_TYPE_RGB16)
in_gl_type = GL_UNSIGNED_SHORT_5_6_5;
if (!gl->GenFramebuffers) {
gst_gl_context_set_error (src->context,
"Context, EXT_framebuffer_object not supported");
goto error;
}
in_size = src->height * src->stride;
out_size = out_height * out_stride;
if (copy_params->respecify) {
if (in_size != out_size) {
GST_ERROR ("Cannot copy between textures with backing data of different"
"sizes. input %" G_GSIZE_FORMAT " output %" G_GSIZE_FORMAT, in_size,
out_size);
goto error;
}
}
if (!tex_id) {
GenTexture data = { 0, };
data.width = copy_params->out_width;
data.height = copy_params->out_height;
data.gl_format = out_gl_format;
data.gl_type = GL_UNSIGNED_BYTE;
if (copy_params->out_format == GST_VIDEO_GL_TEXTURE_TYPE_RGB16)
data.gl_type = GL_UNSIGNED_SHORT_5_6_5;
_generate_texture (context, &data);
tex_id = data.result;
}
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);
gl->FramebufferTexture2D (GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL_TEXTURE_2D, src->tex_id, 0);
if (!gst_gl_context_check_framebuffer_status (src->context))
goto fbo_error;
gl->BindTexture (GL_TEXTURE_2D, tex_id);
if (copy_params->respecify) {
if (!gl->GenBuffers) {
gst_gl_context_set_error (context, "Cannot reinterpret texture contents "
"without buffer objects");
gl->BindTexture (GL_TEXTURE_2D, 0);
goto fbo_error;
}
if (!src->pbo)
gl->GenBuffers (1, &src->pbo);
GST_TRACE ("copying texture data with size of %u*%u*%u",
_gl_format_type_n_bytes (in_gl_format, in_gl_type), src->width,
src->height);
/* copy tex */
gl->BindBuffer (GL_PIXEL_PACK_BUFFER, src->pbo);
gl->BufferData (GL_PIXEL_PACK_BUFFER, in_size, NULL, GL_STREAM_COPY);
gl->ReadPixels (0, 0, src->width, src->height, in_gl_format, in_gl_type, 0);
gl->BindBuffer (GL_PIXEL_PACK_BUFFER, 0);
gl->BindBuffer (GL_PIXEL_UNPACK_BUFFER, src->pbo);
gl->TexSubImage2D (GL_TEXTURE_2D, 0, 0, 0, out_width, out_height,
out_gl_format, out_gl_type, 0);
gl->BindBuffer (GL_PIXEL_UNPACK_BUFFER, 0);
} else { /* different sizes */
gl->CopyTexImage2D (GL_TEXTURE_2D, 0, out_gl_format, 0, 0, out_width,
out_height, 0);
}
gl->BindTexture (GL_TEXTURE_2D, 0);
gl->BindFramebuffer (GL_FRAMEBUFFER, 0);
gl->DeleteFramebuffers (1, &fboId);
copy_params->tex_id = tex_id;
copy_params->result = TRUE;
return;
/* ERRORS */
fbo_error:
{
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;
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->tex_type,
src->width, src->height, src->stride, 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 {
GstGLMemoryCopyParams copy_params;
copy_params.src = src;
copy_params.tex_id = 0;
copy_params.out_format = src->tex_type;
copy_params.out_width = src->width;
copy_params.out_height = src->height;
copy_params.out_stride = src->height;
copy_params.respecify = FALSE;
gst_gl_context_thread_add (src->context, _gl_mem_copy_thread, &copy_params);
dest = g_slice_new0 (GstGLMemory);
_gl_mem_init (dest, src->mem.allocator, NULL, src->context, src->tex_type,
src->width, src->height, src->stride, 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
_destroy_gl_objects (GstGLContext * context, GstGLMemory * gl_mem)
{
const GstGLFuncs *gl = context->gl_vtable;
if (gl_mem->tex_id && !gl_mem->texture_wrapped)
gl->DeleteTextures (1, &gl_mem->tex_id);
if (gl_mem->pbo)
gl->DeleteBuffers (1, &gl_mem->pbo);
}
static void
_gl_mem_free (GstAllocator * allocator, GstMemory * mem)
{
GstGLMemory *gl_mem = (GstGLMemory *) mem;
gst_gl_context_thread_add (gl_mem->context,
(GstGLContextThreadFunc) _destroy_gl_objects, gl_mem);
if (gl_mem->notify)
gl_mem->notify (gl_mem->user_data);
if (gl_mem->data && !gl_mem->data_wrapped) {
g_free (gl_mem->data);
gl_mem->data = NULL;
}
gst_object_unref (gl_mem->context);
g_slice_free (GstGLMemory, gl_mem);
}
/**
* gst_gl_memory_copy_into_texture:
* @gl_mem:a #GstGLMemory
* @tex_id:OpenGL texture id
* @tex_type: a #GstVideoGLTextureType
* @width: width of @tex_id
* @height: height of @tex_id
* @stride: stride of the backing texture data
* @respecify: whether to copy the data or copy per texel
*
* 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.
*
* Returns: Whether the copy suceeded
*/
gboolean
gst_gl_memory_copy_into_texture (GstGLMemory * gl_mem, guint tex_id,
GstVideoGLTextureType tex_type, gint width, gint height, gint stride,
gboolean respecify)
{
GstGLMemoryCopyParams copy_params;
copy_params.src = gl_mem;
copy_params.tex_id = tex_id;
copy_params.out_format = tex_type;
copy_params.out_width = width;
copy_params.out_height = height;
copy_params.out_stride = stride;
copy_params.respecify = respecify;
gst_gl_context_thread_add (gl_mem->context, _gl_mem_copy_thread,
&copy_params);
return copy_params.result;
}
GstGLMemory *
gst_gl_memory_wrapped_texture (GstGLContext * context, guint texture_id,
GstVideoGLTextureType tex_type, gint width, gint height, gpointer user_data,
GDestroyNotify notify)
{
GstGLMemory *mem;
guint n_gl_bytes = _gl_texture_type_n_bytes (tex_type);
mem = g_slice_new0 (GstGLMemory);
_gl_mem_init (mem, _gl_allocator, NULL, context, tex_type, width, height,
width * n_gl_bytes, NULL, NULL);
mem->tex_id = texture_id;
mem->texture_wrapped = TRUE;
mem->data = g_malloc (mem->mem.maxsize);
if (mem->data == NULL) {
gst_memory_unref ((GstMemory *) mem);
return NULL;
}
GST_GL_MEMORY_FLAG_SET (mem, GST_GL_MEMORY_FLAG_NEED_DOWNLOAD);
return mem;
}
/**
* 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, GstVideoGLTextureType tex_type,
gint width, gint height, gint stride)
{
GstGLMemory *mem;
mem = _gl_mem_new (_gl_allocator, NULL, context, tex_type, width, height,
stride, 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, GstVideoGLTextureType tex_type,
gint width, gint height, gint stride, gpointer data, gpointer user_data,
GDestroyNotify notify)
{
GstGLMemory *mem;
mem = _gl_mem_new (_gl_allocator, NULL, context, tex_type, width, height,
stride, user_data, notify);
mem->data = data;
mem->data_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;
}
/**
* gst_gl_memory_setup_buffer:
* @context: a #GstGLContext
* @info: a #GstVideoInfo
* @buffer: a #GstBuffer
*
* Adds the required #GstGLMemory<!-- -->s with the correct configuration to
* @buffer based on @info.
*
* Returns: whether the memory's were sucessfully added.
*/
gboolean
gst_gl_memory_setup_buffer (GstGLContext * context, GstVideoInfo * info,
GstBuffer * buffer)
{
GstGLMemory *gl_mem[GST_VIDEO_MAX_PLANES] = { NULL, };
GstVideoGLTextureType tex_type;
guint n_mem, i;
n_mem = GST_VIDEO_INFO_N_PLANES (info);
for (i = 0; i < n_mem; i++) {
tex_type =
gst_gl_texture_type_from_format (GST_VIDEO_INFO_FORMAT (info), i);
gl_mem[i] =
(GstGLMemory *) gst_gl_memory_alloc (context, tex_type,
_get_plane_width (info, i), _get_plane_height (info, i),
GST_VIDEO_INFO_PLANE_STRIDE (info, i));
gst_buffer_append_memory (buffer, (GstMemory *) gl_mem[i]);
}
gst_buffer_add_video_meta_full (buffer, 0,
GST_VIDEO_INFO_FORMAT (info), GST_VIDEO_INFO_WIDTH (info),
GST_VIDEO_INFO_HEIGHT (info), n_mem, info->offset, info->stride);
return TRUE;
}
/**
* gst_gl_memory_setup_wrapped:
* @context: a #GstGLContext
* @info: a #GstVideoInfo
* @data: a list of per plane data pointers
* @textures: (transfer out): a list of #GstGLMemory
*
* Wraps per plane data pointer in @data into the corresponding entry in
* @textures based on @info.
*
* Returns: whether the memory's were sucessfully created.
*/
gboolean
gst_gl_memory_setup_wrapped (GstGLContext * context, GstVideoInfo * info,
gpointer data[GST_VIDEO_MAX_PLANES],
GstGLMemory * textures[GST_VIDEO_MAX_PLANES])
{
GstVideoGLTextureType tex_type;
gint i;
for (i = 0; i < GST_VIDEO_INFO_N_PLANES (info); i++) {
tex_type =
gst_gl_texture_type_from_format (GST_VIDEO_INFO_FORMAT (info), i);
textures[i] = (GstGLMemory *) gst_gl_memory_wrapped (context, tex_type,
_get_plane_width (info, i), _get_plane_height (info, i),
GST_VIDEO_INFO_PLANE_STRIDE (info, i), data[i], NULL, NULL);
}
return TRUE;
}
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