Commit 59938083 authored by Pierre d'Herbemont's avatar Pierre d'Herbemont
Browse files

modules/video_output/opengllayer.m: Initial creation of a Mac OS X video...

modules/video_output/opengllayer.m: Initial creation of a Mac OS X video output module. Its output is a CAOpenGLLayer. This needs a special video output module as it is not trivial to create an opengl provider module connected to a layer. (the layer request its frames).
parent e7467eba
/*****************************************************************************
* opengl.c: CAOpenGLLayer (Mac OS X) video output. Display a video output in
* a layer. The layer will register itself to the drawable object stored in
* the "drawable" variable.
*****************************************************************************
* Copyright (C) 2004 the VideoLAN team
* $Id$
*
* Authors: Cyril Deguet <asmax@videolan.org>
* Gildas Bazin <gbazin@videolan.org>
* Eric Petit <titer@m0k.org>
* Cedric Cocquebert <cedric.cocquebert@supelec.fr>
* Pierre d'Herbemont <pdherbemont # videolan.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include <errno.h> /* ENOMEM */
#include <vlc/vlc.h>
#include <vlc_vout.h>
#import <QuartzCore/QuartzCore.h>
#import <Cocoa/Cocoa.h>
#import <OpenGL/OpenGL.h>
/* On OS X, use GL_TEXTURE_RECTANGLE_EXT instead of GL_TEXTURE_2D.
This allows sizes which are not powers of 2 */
#define VLCGL_TARGET GL_TEXTURE_RECTANGLE_EXT
/* OS X OpenGL supports YUV. Hehe. */
#define VLCGL_FORMAT GL_YCBCR_422_APPLE
#define VLCGL_TYPE GL_UNSIGNED_SHORT_8_8_APPLE
/* RV32 */
#define VLCGL_RGB_FORMAT GL_RGBA
#define VLCGL_RGB_TYPE GL_UNSIGNED_BYTE
/* YUY2 */
#ifndef YCBCR_MESA
#define YCBCR_MESA 0x8757
#endif
#ifndef UNSIGNED_SHORT_8_8_MESA
#define UNSIGNED_SHORT_8_8_MESA 0x85BA
#endif
#define VLCGL_YUV_FORMAT YCBCR_MESA
#define VLCGL_YUV_TYPE UNSIGNED_SHORT_8_8_MESA
#ifndef GL_CLAMP_TO_EDGE
# define GL_CLAMP_TO_EDGE 0x812F
#endif
/*****************************************************************************
* Vout interface
*****************************************************************************/
static int CreateVout ( vlc_object_t * );
static void DestroyVout ( vlc_object_t * );
static int Init ( vout_thread_t * );
static void End ( vout_thread_t * );
static int Manage ( vout_thread_t * );
static void Render ( vout_thread_t *, picture_t * );
static void DisplayVideo ( vout_thread_t *, picture_t * );
static int Control ( vout_thread_t *, int, va_list );
static int InitTextures ( vout_thread_t * );
vlc_module_begin();
set_shortname( "OpenGLLayer" );
set_category( CAT_VIDEO );
set_subcategory( SUBCAT_VIDEO_VOUT );
set_description( _("Core Animation OpenGL Layer (Mac OS X)") );
set_capability( "video output", 20 );
add_shortcut( "opengllayer" );
set_callbacks( CreateVout, DestroyVout );
vlc_module_end();
@interface VLCVideoLayer : CAOpenGLLayer {
vout_thread_t * p_vout;
}
+ (id)layerWithVout:(vout_thread_t*)_p_vout;
@end
/*****************************************************************************
* vout_sys_t: video output method descriptor
*****************************************************************************
* This structure is part of the video output thread descriptor.
* It describes the OpenGL specific properties of the output thread.
*****************************************************************************/
struct vout_sys_t
{
vout_thread_t * p_vout;
uint8_t *pp_buffer[2]; /* one last rendered, one to be rendered */
int i_index;
vlc_bool_t b_frame_available;
int i_tex_width;
int i_tex_height;
GLuint p_textures[2];
NSAutoreleasePool *autorealease_pool;
VLCVideoLayer * o_layer;
id o_cocoa_container;
};
/*****************************************************************************
* CreateVout: This function allocates and initializes the OpenGL vout method.
*****************************************************************************/
static int CreateVout( vlc_object_t *p_this )
{
vout_thread_t *p_vout = (vout_thread_t *)p_this;
vout_sys_t *p_sys;
char * psz;
/* Allocate structure */
p_vout->p_sys = p_sys = calloc( sizeof( vout_sys_t ), 1 );
if( p_sys == NULL )
{
msg_Err( p_vout, "out of memory" );
return VLC_EGENERIC;
}
p_sys->i_tex_width = p_vout->fmt_in.i_width;
p_sys->i_tex_height = p_vout->fmt_in.i_height;
msg_Dbg( p_vout, "Texture size: %dx%d", p_sys->i_tex_width,
p_sys->i_tex_height );
p_vout->pf_init = Init;
p_vout->pf_end = End;
p_vout->pf_manage = Manage;
p_vout->pf_render = Render;
p_vout->pf_display = DisplayVideo;
p_vout->pf_control = Control;
return VLC_SUCCESS;
}
/*****************************************************************************
* Init: initialize the OpenGL video thread output method
*****************************************************************************/
static int Init( vout_thread_t *p_vout )
{
vout_sys_t *p_sys = p_vout->p_sys;
int i_pixel_pitch;
vlc_value_t val;
#if ( defined( WORDS_BIGENDIAN ) && VLCGL_FORMAT == GL_YCBCR_422_APPLE ) || (VLCGL_FORMAT == YCBCR_MESA)
p_vout->output.i_chroma = VLC_FOURCC('Y','U','Y','2');
i_pixel_pitch = 2;
#elif (VLCGL_FORMAT == GL_YCBCR_422_APPLE)
p_vout->output.i_chroma = VLC_FOURCC('U','Y','V','Y');
i_pixel_pitch = 2;
#endif
/* Since OpenGL can do rescaling for us, stick to the default
* coordinates and aspect. */
p_vout->output.i_width = p_vout->render.i_width;
p_vout->output.i_height = p_vout->render.i_height;
p_vout->output.i_aspect = p_vout->render.i_aspect;
/* We do need a drawable to work properly */
vlc_value_t value_drawable;
var_Create( p_vout, "drawable", VLC_VAR_DOINHERIT );
var_Get( p_vout, "drawable", &value_drawable );
p_vout->p_sys->o_cocoa_container = (id) value_drawable.i_int;
p_vout->fmt_out = p_vout->fmt_in;
p_vout->fmt_out.i_chroma = p_vout->output.i_chroma;
/* We know the chroma, allocate two buffer which will be used
* directly by the decoder */
int i;
for( i = 0; i < 2; i++ )
{
p_sys->pp_buffer[i] =
malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
if( !p_sys->pp_buffer[i] )
{
msg_Err( p_vout, "out of memory" );
return VLC_EGENERIC;
}
}
p_sys->b_frame_available = VLC_FALSE;
p_sys->i_index = 0;
p_vout->p_picture[0].i_planes = 1;
p_vout->p_picture[0].p->p_pixels = p_sys->pp_buffer[0];
p_vout->p_picture[0].p->i_lines = p_vout->output.i_height;
p_vout->p_picture[0].p->i_visible_lines = p_vout->output.i_height;
p_vout->p_picture[0].p->i_pixel_pitch = i_pixel_pitch;
p_vout->p_picture[0].p->i_pitch = p_vout->output.i_width *
p_vout->p_picture[0].p->i_pixel_pitch;
p_vout->p_picture[0].p->i_visible_pitch = p_vout->output.i_width *
p_vout->p_picture[0].p->i_pixel_pitch;
p_vout->p_picture[0].i_status = DESTROYED_PICTURE;
p_vout->p_picture[0].i_type = DIRECT_PICTURE;
PP_OUTPUTPICTURE[ 0 ] = &p_vout->p_picture[0];
I_OUTPUTPICTURES = 1;
p_sys->autorealease_pool = [[NSAutoreleasePool alloc] init];
[VLCVideoLayer performSelectorOnMainThread:@selector(autoinitInVout:)
withObject:[NSValue valueWithPointer:p_vout]
waitUntilDone:YES];
return 0;
}
/*****************************************************************************
* End: terminate GLX video thread output method
*****************************************************************************/
static void End( vout_thread_t *p_vout )
{
vout_sys_t *p_sys = p_vout->p_sys;
p_vout->p_sys->b_frame_available = 0;
[p_sys->o_layer performSelectorOnMainThread:@selector(removeFromSuperlayer)
withObject:nil waitUntilDone:YES];
[p_sys->o_layer release];
[p_sys->autorealease_pool release];
/* Free the texture buffer*/
glDeleteTextures( 2, p_sys->p_textures );
if( p_sys->pp_buffer[0] ) free( p_sys->pp_buffer[0] );
if( p_sys->pp_buffer[1] ) free( p_sys->pp_buffer[1] );
}
/*****************************************************************************
* Destroy: destroy GLX video thread output method
*****************************************************************************
* Terminate an output method created by CreateVout
*****************************************************************************/
static void DestroyVout( vlc_object_t *p_this )
{
vout_thread_t *p_vout = (vout_thread_t *)p_this;
vout_sys_t *p_sys = p_vout->p_sys;
free( p_sys );
}
/*****************************************************************************
* Manage: handle Sys events
*****************************************************************************
* This function should be called regularly by video output thread. It returns
* a non null value if an error occurred.
*****************************************************************************/
static int Manage( vout_thread_t *p_vout )
{
return VLC_SUCCESS;
}
/*****************************************************************************
* Render: render previously calculated output
*****************************************************************************/
static void Render( vout_thread_t *p_vout, picture_t *p_pic )
{
vout_sys_t *p_sys = p_vout->p_sys;
/* Switch buffers */
int p_new_index;
@synchronized(p_sys->o_layer)
{
p_new_index = (p_sys->i_index + 1) & 1;
}
/* Give a buffer where the image will be rendered */
p_pic->p->p_pixels = p_sys->pp_buffer[p_new_index];
}
/*****************************************************************************
* DisplayVideo: displays previously rendered output
*****************************************************************************/
static void DisplayVideo( vout_thread_t *p_vout, picture_t *p_pic )
{
vout_sys_t *p_sys = p_vout->p_sys;
/* The frame is ready, give its number so the o_layer can display it */
@synchronized(p_sys->o_layer)
{
p_sys->i_index = (p_sys->i_index + 1) & 1; /* Indicate the layer should use that index */
}
p_sys->b_frame_available = 1;
}
/*****************************************************************************
* Control: control facility for the vout
*****************************************************************************/
static int Control( vout_thread_t *p_vout, int i_query, va_list args )
{
vout_sys_t *p_sys = p_vout->p_sys;
switch( i_query )
{
case VOUT_SNAPSHOT:
return vout_vaControlDefault( p_vout, i_query, args );
default:
if( p_sys->p_vout->pf_control )
return p_sys->p_vout->pf_control( p_sys->p_vout, i_query, args );
else
return vout_vaControlDefault( p_vout, i_query, args );
}
}
/*****************************************************************************
* InitTextures
*****************************************************************************/
static int InitTextures( vout_thread_t *p_vout )
{
vout_sys_t *p_sys = p_vout->p_sys;
int i_index;
glDeleteTextures( 2, p_sys->p_textures );
glGenTextures( 2, p_sys->p_textures );
for( i_index = 0; i_index < 2; i_index++ )
{
glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_index] );
/* Set the texture parameters */
glTexParameterf( VLCGL_TARGET, GL_TEXTURE_PRIORITY, 1.0 );
glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
#ifdef __DISABLED_FOR_NOW__
/* Tell the driver not to make a copy of the texture but to use
our buffer */
glEnable( GL_UNPACK_CLIENT_STORAGE_APPLE );
glPixelStorei( GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE );
/* Use AGP texturing */
glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
GL_STORAGE_SHARED_APPLE );
#endif
/* Call glTexImage2D only once, and use glTexSubImage2D later */
glTexImage2D( VLCGL_TARGET, 0, 3, p_sys->i_tex_width,
p_sys->i_tex_height, 0, VLCGL_FORMAT, VLCGL_TYPE,
p_sys->pp_buffer[i_index] );
}
return 0;
}
/*****************************************************************************
* @implementation VLCVideoLayer
*/
@implementation VLCVideoLayer
/*****************************************************************************
* autoinitInVout: Called from the video thread to create a layer.
* The created layer is stored in the p_vout. We do that way because, cocoa
* doesn't support layer creation on non-main thread.
*****************************************************************************/
+ (void)autoinitInVout:(NSValue*)arg
{
vout_thread_t * p_vout = [arg pointerValue];
p_vout->p_sys->o_layer = [[VLCVideoLayer layerWithVout: p_vout] retain];
[p_vout->p_sys->o_cocoa_container addVoutSubview:p_vout->p_sys->o_layer];
}
- (void)setVout:(vout_thread_t*)_p_vout
{
p_vout = _p_vout;
}
+ (id)layerWithVout:(vout_thread_t*)_p_vout
{
VLCVideoLayer* me = [super layer];
if( me )
{
me.asynchronous = YES;
[me setVout: _p_vout];
}
return me;
}
- (BOOL)canDrawInCGLContext:(CGLContextObj)glContext pixelFormat:(CGLPixelFormatObj)pixelFormat forLayerTime:(CFTimeInterval)timeInterval displayTime:(const CVTimeStamp *)timeStamp
{
/* Only draw the frame when if have a frame that was previously rendered */
return p_vout->p_sys->b_frame_available;
}
- (void)drawInCGLContext:(CGLContextObj)glContext pixelFormat:(CGLPixelFormatObj)pixelFormat forLayerTime:(CFTimeInterval)timeInterval displayTime:(const CVTimeStamp *)timeStamp
{
/* Init */
CGLLockContext( glContext );
CGLSetCurrentContext( glContext );
float f_width, f_height, f_x, f_y;
f_x = (float)p_vout->fmt_out.i_x_offset;
f_y = (float)p_vout->fmt_out.i_y_offset;
f_width = (float)p_vout->fmt_out.i_x_offset +
(float)p_vout->fmt_out.i_visible_width;
f_height = (float)p_vout->fmt_out.i_y_offset +
(float)p_vout->fmt_out.i_visible_height;
@synchronized(self)
{
glBindTexture( VLCGL_TARGET, p_vout->p_sys->p_textures[p_vout->p_sys->i_index] );
glTexSubImage2D( VLCGL_TARGET, 0, 0, 0,
p_vout->fmt_out.i_width,
p_vout->fmt_out.i_height,
VLCGL_FORMAT, VLCGL_TYPE, p_vout->p_sys->pp_buffer[p_vout->p_sys->i_index] );
}
glClear( GL_COLOR_BUFFER_BIT );
glEnable( VLCGL_TARGET );
glBegin( GL_POLYGON );
glTexCoord2f( f_x, f_y ); glVertex2f( -1.0, 1.0 );
glTexCoord2f( f_width, f_y ); glVertex2f( 1.0, 1.0 );
glTexCoord2f( f_width, f_height ); glVertex2f( 1.0, -1.0 );
glTexCoord2f( f_x, f_height ); glVertex2f( -1.0, -1.0 );
glEnd();
glDisable( VLCGL_TARGET );
glFlush();
CGLUnlockContext( glContext );
}
- (CGLPixelFormatObj)copyCGLPixelFormatForDisplayMask:(uint32_t)mask
{
GLuint attribs[] =
{
NSOpenGLPFANoRecovery,
NSOpenGLPFAWindow,
NSOpenGLPFAAccelerated,
NSOpenGLPFADoubleBuffer,
NSOpenGLPFAColorSize, 24,
NSOpenGLPFAAlphaSize, 8,
NSOpenGLPFADepthSize, 24,
NSOpenGLPFAStencilSize, 8,
NSOpenGLPFAAccumSize, 0,
0
};
NSOpenGLPixelFormat* fmt = [[NSOpenGLPixelFormat alloc] initWithAttributes: (NSOpenGLPixelFormatAttribute*) attribs];
return [fmt CGLPixelFormatObj];
}
- (CGLContextObj)copyCGLContextForPixelFormat:(CGLPixelFormatObj)pixelFormat
{
CGLContextObj context = [super copyCGLContextForPixelFormat:pixelFormat];
CGLLockContext( context );
CGLSetCurrentContext( context );
InitTextures( p_vout );
glDisable(GL_BLEND);
glDisable(GL_DEPTH_TEST);
glDepthMask(GL_FALSE);
glDisable(GL_CULL_FACE);
glClearColor( 0.0f, 0.0f, 0.0f, 1.0f );
glClear( GL_COLOR_BUFFER_BIT );
CGLUnlockContext( context );
return context;
}
@end
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