]> git.sesse.net Git - mlt/blob - src/modules/opengl/transition_movit_mix.cpp
Add property animation to the other movit services.
[mlt] / src / modules / opengl / transition_movit_mix.cpp
1 /*
2  * transition_movit_mix.cpp
3  * Copyright (C) 2013 Dan Dennedy <dan@dennedy.org>
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License as published by
7  * the Free Software Foundation; either version 2 of the License, or
8  * (at your option) any later version.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software Foundation,
17  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18  */
19
20
21 #include <framework/mlt.h>
22 #include <string.h>
23 #include <assert.h>
24
25 #include "glsl_manager.h"
26 #include <movit/init.h>
27 #include <movit/effect_chain.h>
28 #include <movit/util.h>
29 #include <movit/mix_effect.h>
30 #include "mlt_movit_input.h"
31 #include "mlt_flip_effect.h"
32
33 static int get_image( mlt_frame a_frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
34 {
35         int error = 0;
36
37         // Get the b frame from the stack
38         mlt_frame b_frame = (mlt_frame) mlt_frame_pop_frame( a_frame );
39
40         // Get the transition object
41         mlt_transition transition = (mlt_transition) mlt_frame_pop_service( a_frame );
42
43         // Get the properties of the transition
44         mlt_properties properties = MLT_TRANSITION_PROPERTIES( transition );
45
46         // Get the properties of the a frame
47         mlt_properties a_props = MLT_FRAME_PROPERTIES( a_frame );
48
49         // Get the movit objects
50         mlt_service service = MLT_TRANSITION_SERVICE( transition );
51         mlt_service_lock( service );
52         EffectChain* chain = GlslManager::get_chain( service );
53         Effect* effect = (Effect*) mlt_properties_get_data( properties, "movit effect", NULL );
54         MltInput* a_input = GlslManager::get_input( service );
55         MltInput* b_input = (MltInput*) mlt_properties_get_data( properties, "movit input B", NULL );
56         mlt_image_format output_format = *format;
57
58         if ( !chain || !a_input ) {
59                 mlt_service_unlock( service );
60                 return 2;
61         }
62
63         // Get the transition parameters
64         mlt_position position = mlt_transition_get_position( transition, a_frame );
65         mlt_position length = mlt_transition_get_length( transition );
66         int reverse = mlt_properties_get_int( properties, "reverse" );
67         double mix = mlt_properties_get( properties, "mix" ) ?
68                 mlt_properties_anim_get_double( properties, "mix", position, length ) :
69                 mlt_transition_get_progress( transition, a_frame );
70         double inverse = 1.0 - mix;
71
72         // Set the movit parameters
73         bool ok = effect->set_float( "strength_first",  reverse ? mix : inverse );
74         ok     |= effect->set_float( "strength_second", reverse ? inverse : mix );
75         assert( ok );
76
77         // Get the frames' textures
78         GLuint* texture_id[2] = {0, 0};
79         *format = mlt_image_glsl_texture;
80         mlt_frame_get_image( a_frame, (uint8_t**) &texture_id[0], format, width, height, 0 );
81         a_input->useFBOInput( chain, *texture_id[0] );
82         *format = mlt_image_glsl_texture;
83         mlt_frame_get_image( b_frame, (uint8_t**) &texture_id[1], format, width, height, 0 );
84         b_input->useFBOInput( chain, *texture_id[1] );
85
86         // Set resolution to that of the a_frame
87         *width = mlt_properties_get_int( a_props, "width" );
88         *height = mlt_properties_get_int( a_props, "height" );
89
90         // Setup rendering to an FBO
91         GlslManager* glsl = GlslManager::get_instance();
92         glsl_fbo fbo = glsl->get_fbo( *width, *height );
93         if ( output_format == mlt_image_glsl_texture ) {
94                 glsl_texture texture = glsl->get_texture( *width, *height, GL_RGBA );
95
96                 glBindFramebuffer( GL_FRAMEBUFFER, fbo->fbo );
97                 check_error();
98                 glFramebufferTexture2D( GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture->texture, 0 );
99                 check_error();
100                 glBindFramebuffer( GL_FRAMEBUFFER, 0 );
101                 check_error();
102
103                 GlslManager::render( service, chain, fbo->fbo, *width, *height );
104
105                 glFinish();
106                 check_error();
107                 glBindFramebuffer( GL_FRAMEBUFFER, 0 );
108                 check_error();
109
110                 *image = (uint8_t*) &texture->texture;
111                 mlt_frame_set_image( a_frame, *image, 0, NULL );
112                 mlt_properties_set_data( properties, "movit.convert", texture, 0,
113                         (mlt_destructor) GlslManager::release_texture, NULL );
114                 *format = output_format;
115         }
116         else {
117                 // Use a PBO to hold the data we read back with glReadPixels()
118                 // (Intel/DRI goes into a slow path if we don't read to PBO)
119                 GLenum gl_format = ( output_format == mlt_image_rgb24a || output_format == mlt_image_opengl )?
120                         GL_RGBA : GL_RGB;
121                 int img_size = *width * *height * ( gl_format == GL_RGB? 3 : 4 );
122                 glsl_pbo pbo = glsl->get_pbo( img_size );
123                 glsl_texture texture = glsl->get_texture( *width, *height, gl_format );
124
125                 if ( fbo && pbo && texture ) {
126                         // Set the FBO
127                         glBindFramebuffer( GL_FRAMEBUFFER, fbo->fbo );
128                         check_error();
129                         glFramebufferTexture2D( GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture->texture, 0 );
130                         check_error();
131                         glBindFramebuffer( GL_FRAMEBUFFER, 0 );
132                         check_error();
133
134                         GlslManager::render( service, chain, fbo->fbo, *width, *height );
135
136                         // Read FBO into PBO
137                         glBindBuffer( GL_PIXEL_PACK_BUFFER_ARB, pbo->pbo );
138                         check_error();
139                         glBufferData( GL_PIXEL_PACK_BUFFER_ARB, img_size, NULL, GL_STREAM_READ );
140                         check_error();
141                         glReadPixels( 0, 0, *width, *height, gl_format, GL_UNSIGNED_BYTE, BUFFER_OFFSET(0) );
142                         check_error();
143
144                         // Copy from PBO
145                         uint8_t* buf = (uint8_t*) glMapBuffer( GL_PIXEL_PACK_BUFFER_ARB, GL_READ_ONLY );
146                         check_error();
147
148                         *format = gl_format == GL_RGBA ? mlt_image_rgb24a : mlt_image_rgb24;
149                         *image = (uint8_t*) mlt_pool_alloc( img_size );
150                         mlt_frame_set_image( a_frame, *image, img_size, mlt_pool_release );
151                         memcpy( *image, buf, img_size );
152
153                         // Release PBO and FBO
154                         glUnmapBuffer( GL_PIXEL_PACK_BUFFER_ARB );
155                         check_error();
156                         glBindBuffer( GL_PIXEL_PACK_BUFFER_ARB, 0 );
157                         check_error();
158                         glBindFramebuffer( GL_FRAMEBUFFER, 0 );
159                         check_error();
160                         glBindTexture( GL_TEXTURE_2D, 0 );
161                         check_error();
162                         GlslManager::release_texture( texture );
163                 }
164                 else {
165                         error = 1;
166                 }
167         }
168         if ( fbo ) GlslManager::release_fbo( fbo );
169         mlt_service_unlock( service );
170
171         return error;
172 }
173
174 static mlt_frame process( mlt_transition transition, mlt_frame a_frame, mlt_frame b_frame )
175 {
176         mlt_service service = MLT_TRANSITION_SERVICE(transition);
177
178         if ( !GlslManager::init_chain( service ) ) {
179                 // Create the Movit effect chain
180                 EffectChain* chain = GlslManager::get_chain( service );
181                 mlt_profile profile = mlt_service_profile( service );
182                 Input* b_input = new MltInput( profile->width, profile->height );
183                 ImageFormat output_format;
184                 output_format.color_space = COLORSPACE_sRGB;
185                 output_format.gamma_curve = GAMMA_sRGB;
186                 chain->add_input( b_input );
187                 chain->add_output( output_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED );
188                 chain->set_dither_bits( 8 );
189
190                 Effect* effect = chain->add_effect( new MixEffect(),
191                         GlslManager::get_input( service ), b_input );
192
193                 // Save these new effects on properties for get_image
194                 mlt_properties properties = MLT_TRANSITION_PROPERTIES(transition);
195                 mlt_properties_set_data( properties, "movit effect", effect, 0, NULL, NULL );
196                 mlt_properties_set_data( properties, "movit input B", b_input, 0, NULL, NULL );
197         }
198
199         // Push the transition on to the frame
200         mlt_frame_push_service( a_frame, transition );
201
202         // Push the b_frame on to the stack
203         mlt_frame_push_frame( a_frame, b_frame );
204
205         // Push the transition method
206         mlt_frame_push_get_image( a_frame, get_image );
207
208         return a_frame;
209 }
210
211 extern "C"
212 mlt_transition transition_movit_mix_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
213 {
214         mlt_transition transition = NULL;
215         GlslManager* glsl = GlslManager::get_instance();
216         if ( glsl && ( transition = mlt_transition_new() ) ) {
217                 transition->process = process;
218                 mlt_properties_set( MLT_TRANSITION_PROPERTIES( transition ), "mix", arg );
219                 
220                 // Inform apps and framework that this is a video only transition
221                 mlt_properties_set_int( MLT_TRANSITION_PROPERTIES( transition ), "_transition_type", 1 );
222         }
223         return transition;
224 }