diff options
Diffstat (limited to 'ext/eglgles/gstegladaptation_eagl.m')
| -rw-r--r-- | ext/eglgles/gstegladaptation_eagl.m | 279 |
1 files changed, 279 insertions, 0 deletions
diff --git a/ext/eglgles/gstegladaptation_eagl.m b/ext/eglgles/gstegladaptation_eagl.m new file mode 100644 index 000000000..55c0a23fc --- /dev/null +++ b/ext/eglgles/gstegladaptation_eagl.m @@ -0,0 +1,279 @@ +/* + * GStreamer EGL/GLES Sink Adaptation for IOS + * Copyright (C) 2013 Collabora Ltd. + * @author: Thiago Santos <thiago.sousa.santos@collabora.com> + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + * Alternatively, the contents of this file may be used under the + * GNU Lesser General Public License Version 2.1 (the "LGPL"), in + * which case the following provisions apply instead of the ones + * mentioned above: + * + * 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., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ + +typedef struct _GstEaglContext +{ + EAGLContext *eagl_context; + GLUint framebuffer; + GLUint color_renderbuffer; +} GstEaglContext; + +void +gst_egl_adaptation_context_init (GstEglAdaptationContext * ctx) +{ + ctx->eaglctx = g_new0 (GstEaglContext, 1); +} + +void +gst_egl_adaptation_context_deinit (GstEglAdaptationContext * ctx) +{ + g_free (ctx->eaglctx); +} + +gboolean +gst_egl_adaptation_init_display (GstEglAdaptationContext * ctx) +{ + /* NOP - the display should be initialized by the application */ +} + +void +gst_egl_adaptation_context_terminate_display (GstEglAdaptationContext * ctx) +{ + /* NOP */ +} + +void +gst_egl_adaptation_context_bind_API (GstEglAdaptationContext * ctx) +{ + /* NOP */ +} + +gboolean +gst_egl_adaptation_create_native_window (GstEglAdaptationContext * ctx, gint width, gint height, gpointer * own_window_data) +{ +} + +void +gst_egl_adaptation_destroy_native_window (GstEglAdaptationContext * ctx, gpointer * own_window_data) +{ +} + +gboolean +gst_egl_adaptation_create_egl_context (GstEglAdaptationContext * ctx) +{ + EAGLContext *context; + context = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2]; + if (context == nil) + GST_ERROR_OBJECT (ctx->element, "Failed to create EAGL GLES2 context"); + return FALSE; + } + ctx->eagl_context = context; + + return TRUE; +} + +gboolean +gst_egl_adaptation_context_make_current (GstEglAdaptationContext * ctx, + gboolean bind) +{ + if (bind && ctx->eagl_context) { + EAGLContext *cur_ctx = [EAGLContext currentContext]; + + if (cur_ctx == ctx->eagl_context) { + GST_DEBUG_OBJECT (ctx->element, + "Already attached the context to thread %p", g_thread_self ()); + return TRUE; + } + + GST_DEBUG_OBJECT (ctx->element, "Attaching context to thread %p", + g_thread_self ()); + if ([EAGLContext setCurrentContext: ctx->eagl_context] == NO) { + got_egl_error ("eglMakeCurrent"); + GST_ERROR_OBJECT (ctx->element, "Couldn't bind context"); + return FALSE; + } + } else { + GST_DEBUG_OBJECT (ctx->element, "Detaching context from thread %p", + g_thread_self ()); + if ([EAGLContext setCurrentContext: nil] == NO) { + got_egl_error ("eglMakeCurrent"); + GST_ERROR_OBJECT (ctx->element, "Couldn't unbind context"); + return FALSE; + } + } + + return TRUE; +} + +gboolean +gst_egl_adaptation_create_surface (GstEglAdaptationContext * ctx) +{ + GLuint framebuffer; + GLuint colorRenderbuffer; + GLint width; + GLint height; + GLuint depthRenderbuffer; + GLenum status; + + /* Allocate framebuffer */ + glGenFramebuffers(1, &framebuffer); + glBindFramebuffer(GL_FRAMEBUFFER, framebuffer); + + /* Allocate color render buffer */ + glGenRenderbuffers(1, &colorRenderbuffer); + glBindRenderbuffer(GL_RENDERBUFFER, colorRenderbuffer); + [ctx->eagl_context renderbufferStorage:GL_RENDERBUFFER fromDrawable:myEAGLLayer]; + glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, + GL_RENDERBUFFER, colorRenderbuffer); + + /* Get renderbuffer width/height */ + glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_WIDTH, &width); + glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_HEIGHT, &height); + + /* allocate depth render buffer */ + glGenRenderbuffers(1, &depthRenderbuffer); + glBindRenderbuffer(GL_RENDERBUFFER, depthRenderbuffer); + glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT16, width, height); + glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, + GL_RENDERBUFFER, depthRenderbuffer); + + /* check creation status */ + status = glCheckFramebufferStatus(GL_FRAMEBUFFER); + if(status != GL_FRAMEBUFFER_COMPLETE) { + NSLog(@"failed to make complete framebuffer object %x", status); + return FALSE; + } + + ctx->framebuffer = framebuffer; + ctx->color_renderbuffer = colorRenderbuffer; + + return TRUE; +} + +gboolean +_gst_egl_choose_config (GstEglAdaptationContext * ctx, gboolean try_only, gint * num_configs) +{ + CAEAGLLayer *eaglLayer = (CAEAGLLayer *)[[UIView ctx->window] layer]; + NSDictionary *dict = [NSDictionary dictionaryWithObjectsAndKeys: + [NSNumber numberWithBool:NO], kEAGLDrawablePropertyRetainedBacking, + kEAGLColorFormatRGBA8888, kEAGLDrawablePropertyColorFormat, + nil]; + [eaglLayer setOpaque:YES]; + [eaglLayer setDrawableProperties:dict]; + + if (num_configs) + *num_configs = 1; +} + +void +gst_egl_adaptation_query_buffer_preserved (GstEglAdaptationContext * ctx) +{ + CAEAGLLayer *eaglLayer = (CAEAGLLayer *)[[UIView ctx->window] layer]; + NSDictionary *dict = [eaglLayer drawableProperties]; + + ctx->buffer_preserved = FALSE; + if ([dict objectForKey: kEAGLDrawablePropertyRetainedBacking] != nil) { + NSNumber n = [dict objectForKey: kEAGLDrawablePropertyRetainedBacking]; + ctx->buffer_preserved = n != [NSNumber numberWithBool:NO]; + } else { + GST_DEBUG_OBJECT (ctx->element, "No information about buffer preserving in layer properties"); + } +} + +void +gst_egl_adaptation_query_par (GstEglAdaptationContext * ctx) +{ + /* TODO how can we check this? */ + ctx->pixel_aspect_ratio = EGL_DISPLAY_SCALING; +} + +gboolean +gst_egl_adaptation_context_update_surface_dimensions (GstEglAdaptationContext * + ctx) +{ + GLint width; + GLint height; + + /* Get renderbuffer width/height */ + glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_WIDTH, &width); + glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_HEIGHT, &height); + + if (width != ctx->surface_width || height != ctx->surface_height) { + ctx->surface_width = width; + ctx->surface_height = height; + GST_INFO_OBJECT (ctx->element, "Got surface of %dx%d pixels", width, + height); + return TRUE; + } + + return FALSE; +} + +void +gst_egl_adaptation_context_init_egl_exts (GstEglAdaptationContext * ctx) +{ + NSString *extensionsString = [NSString stringWithCString:glGetString(GL_EXTENSIONS) encoding: NSASCIIStringEncoding]; + + GST_DEBUG_OBJECT (ctx->element, "Available GL extensions: %s\n", + GST_STR_NULL ([extensionsString UTF8String])); +} + +void +gst_egl_adaptation_destroy_surface (GstEglAdaptationContext * ctx) +{ + if (ctx->framebuffer) { + glDeleteFrameuffers (1, &ctx->framebuffer); + ctx->framebuffer = 0; + ctx->have_surface = FALSE; + } +} + +void +gst_egl_adaptation_destroy_context (GstEglAdaptationContext * ctx) +{ + if (ctx->eglglesctx.eglcontext) { + [ctx->eagl_context dealloc]; + ctx->eagl_context = NULL; + } +} + +gboolean +gst_egl_adaptation_context_swap_buffers (GstEglAdaptationContext * ctx) +{ + glBindRenderbuffer(GL_RENDERBUFFER, ctx->colorRenderbuffer); + [context presentRenderbuffer:GL_RENDERBUFFER]; + + return TRUE; +} + |