2 * consumer_sdl.c -- A Simple DirectMedia Layer consumer
3 * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
4 * Author: Dan Dennedy <dan@dennedy.org>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software Foundation,
18 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 #include "consumer_sdl.h"
22 #include <framework/mlt_frame.h>
28 #include <SDL/SDL_syswm.h>
30 /** This classes definition.
33 typedef struct consumer_sdl_s *consumer_sdl;
37 struct mlt_consumer_s parent;
38 mlt_properties properties;
43 uint8_t audio_buffer[ 4096 * 3 ];
45 pthread_mutex_t audio_mutex;
46 pthread_cond_t audio_cond;
57 SDL_Surface *sdl_screen;
58 SDL_Overlay *sdl_overlay;
62 /** Forward references to static functions.
65 static void consumer_close( mlt_consumer parent );
66 static void *consumer_thread( void * );
67 static int consumer_get_dimensions( int *width, int *height );
69 /** This is what will be called by the factory - anything can be passed in
70 via the argument, but keep it simple.
73 mlt_consumer consumer_sdl_init( char *arg )
75 // Create the consumer object
76 consumer_sdl this = calloc( sizeof( struct consumer_sdl_s ), 1 );
78 // If no malloc'd and consumer init ok
79 if ( this != NULL && mlt_consumer_init( &this->parent, this ) == 0 )
81 // Get the parent consumer object
82 mlt_consumer parent = &this->parent;
84 // We have stuff to clean up, so override the close method
85 parent->close = consumer_close;
87 // get a handle on properties
88 mlt_service service = mlt_consumer_service( parent );
89 this->properties = mlt_service_properties( service );
91 // Set the default volume
92 mlt_properties_set_double( this->properties, "volume", 1.0 );
94 // This is the initialisation of the consumer
96 pthread_mutex_init( &this->audio_mutex, NULL );
97 pthread_cond_init( &this->audio_cond, NULL);
99 // process actual param
100 if ( arg == NULL || !strcmp( arg, "PAL" ) )
105 else if ( !strcmp( arg, "NTSC" ) )
110 else if ( sscanf( arg, "%dx%d", &this->width, &this->height ) != 2 )
116 // Default window size and aspect ratio
117 this->aspect_ratio = 4.0 / 3.0;
118 this->window_width = (int)( (float)this->height * this->aspect_ratio ) + 1;
119 this->window_height = this->height;
122 this->sdl_flags = SDL_HWSURFACE | SDL_DOUBLEBUF | SDL_HWACCEL | SDL_RESIZABLE;
124 // Create the the thread
125 pthread_create( &this->thread, NULL, consumer_thread, this );
127 // Return the consumer produced
131 // malloc or consumer init failed
138 static int sdl_lock_display( )
140 SDL_Surface *screen = SDL_GetVideoSurface( );
141 return screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
144 static void sdl_unlock_display( )
146 SDL_Surface *screen = SDL_GetVideoSurface( );
147 if ( screen != NULL && SDL_MUSTLOCK( screen ) )
148 SDL_UnlockSurface( screen );
151 static void sdl_fill_audio( void *udata, uint8_t *stream, int len )
153 consumer_sdl this = udata;
156 float volume = mlt_properties_get_double( this->properties, "volume" );
158 pthread_mutex_lock( &this->audio_mutex );
160 // Block until audio received
161 while ( this->running && len > this->audio_avail )
162 pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
164 if ( this->audio_avail >= len )
166 // Place in the audio buffer
167 SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
169 // Remove len from the audio available
170 this->audio_avail -= len;
172 // Remove the samples
173 memmove( this->audio_buffer, this->audio_buffer + len, this->audio_avail );
177 // Just to be safe, wipe the stream first
178 memset( stream, 0, len );
180 // Copy what we have into the stream
181 memcpy( stream, this->audio_buffer, this->audio_avail );
184 SDL_MixAudio( stream, stream, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
187 this->audio_avail = 0;
190 // We're definitely playing now
193 pthread_cond_broadcast( &this->audio_cond );
194 pthread_mutex_unlock( &this->audio_mutex );
197 static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_audio )
199 // Get the properties of this consumer
200 mlt_properties properties = this->properties;
201 mlt_audio_format afmt = mlt_audio_pcm;
208 mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
210 if ( mlt_properties_get_int( properties, "audio_off" ) )
216 if ( init_audio == 1 )
218 SDL_AudioSpec request;
221 // specify audio format
222 memset( &request, 0, sizeof( SDL_AudioSpec ) );
224 request.freq = frequency;
225 request.format = AUDIO_S16;
226 request.channels = channels;
227 request.samples = 1024;
228 request.callback = sdl_fill_audio;
229 request.userdata = (void *)this;
230 if ( SDL_OpenAudio( &request, &got ) != 0 )
232 fprintf( stderr, "SDL failed to open audio: %s\n", SDL_GetError() );
245 if ( init_audio == 0 )
247 bytes = ( samples * channels * 2 );
248 pthread_mutex_lock( &this->audio_mutex );
249 while ( bytes > ( sizeof( this->audio_buffer) - this->audio_avail ) )
250 pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
251 mlt_properties properties = mlt_frame_properties( frame );
252 if ( mlt_properties_get_double( properties, "speed" ) == 1 )
253 memcpy( &this->audio_buffer[ this->audio_avail ], pcm, bytes );
255 memset( &this->audio_buffer[ this->audio_avail ], 0, bytes );
256 this->audio_avail += bytes;
257 pthread_cond_broadcast( &this->audio_cond );
258 pthread_mutex_unlock( &this->audio_mutex );
268 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
270 // Get the properties of this consumer
271 mlt_properties properties = this->properties;
273 mlt_image_format vfmt = mlt_image_yuv422;
274 int width = this->width, height = this->height;
278 if ( mlt_properties_get_int( properties, "video_off" ) )
280 mlt_frame_close( frame );
284 if ( this->count == this->size )
287 this->queue = realloc( this->queue, sizeof( mlt_frame ) * this->size );
289 this->queue[ this->count ++ ] = frame;
293 // We're working on the oldest frame now
294 frame = this->queue[ 0 ];
296 // Shunt the frames in the queue down
298 for ( i = 1; i < this->count; i ++ )
299 this->queue[ i - 1 ] = this->queue[ i ];
302 // Get the image, width and height
303 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
305 if ( this->sdl_screen != NULL )
309 changed = consumer_get_dimensions( &this->window_width, &this->window_height );
311 while ( SDL_PollEvent( &event ) )
315 case SDL_VIDEORESIZE:
316 this->window_width = event.resize.w;
317 this->window_height = event.resize.h;
322 mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
323 void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
324 if ( callback != NULL && producer != NULL )
325 callback( producer, SDL_GetKeyName(event.key.keysym.sym) );
333 if ( width != this->width || height != this->height )
336 this->height = height;
340 if ( this->sdl_screen == NULL || changed )
342 double aspect_ratio = mlt_frame_get_aspect_ratio( frame );
343 float display_aspect_ratio = (float)width / (float)height;
346 if ( mlt_properties_get_double( properties, "aspect_ratio" ) )
347 aspect_ratio = mlt_properties_get_double( properties, "aspect_ratio" );
349 if ( aspect_ratio == 1 )
351 rect.w = this->window_width;
352 rect.h = this->window_height;
354 else if ( this->window_width < this->window_height * aspect_ratio )
356 rect.w = this->window_width;
357 rect.h = this->window_width / aspect_ratio;
361 rect.w = this->window_height * aspect_ratio;
362 rect.h = this->window_height;
365 if ( mlt_properties_get_int( properties, "scale_overlay" ) )
367 if ( ( float )rect.w * display_aspect_ratio < this->window_width )
368 rect.w = ( int )( ( float )rect.w * display_aspect_ratio );
369 else if ( ( float )rect.h * display_aspect_ratio < this->window_height )
370 rect.h = ( int )( ( float )rect.h * display_aspect_ratio );
373 rect.x = ( this->window_width - rect.w ) / 2;
374 rect.y = ( this->window_height - rect.h ) / 2;
376 // Force an overlay recreation
377 if ( this->sdl_overlay != NULL )
378 SDL_FreeYUVOverlay( this->sdl_overlay );
380 // open SDL window with video overlay, if possible
381 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
383 if ( this->sdl_screen != NULL )
385 SDL_SetClipRect( this->sdl_screen, &rect );
388 this->sdl_overlay = SDL_CreateYUVOverlay( this->width - (this->width % 4), this->height- (this->height % 2 ), SDL_YUY2_OVERLAY, this->sdl_screen );
389 sdl_unlock_display();
393 if ( this->sdl_screen != NULL && this->sdl_overlay != NULL )
395 this->buffer = this->sdl_overlay->pixels[ 0 ];
396 if ( SDL_LockYUVOverlay( this->sdl_overlay ) >= 0 )
398 mlt_resize_yuv422( this->buffer, this->width - (this->width % 4 ), this->height- (this->height % 2 ), image, width, height );
399 SDL_UnlockYUVOverlay( this->sdl_overlay );
400 SDL_DisplayYUVOverlay( this->sdl_overlay, &this->sdl_screen->clip_rect );
411 mlt_frame_close( frame );
414 mlt_frame_get_image( this->queue[ this->count - 1 ], &image, &vfmt, &width, &height, 0 );
419 /** Threaded wrapper for pipe.
422 static void *consumer_thread( void *arg )
425 consumer_sdl this = arg;
428 mlt_consumer consumer = &this->parent;
430 // Get the service assoicated to the consumer
431 mlt_service service = mlt_consumer_service( consumer );
433 // Define a frame pointer
436 // internal intialization
439 if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_NOPARACHUTE ) < 0 )
441 fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
445 // Loop until told not to
446 while( this->running )
448 // Get a frame from the service (should never return anything other than 0)
449 if ( mlt_service_get_frame( service, &frame, 0 ) == 0 )
451 init_audio = consumer_play_audio( this, frame, init_audio );
452 consumer_play_video( this, frame );
457 if ( init_audio == 0 )
459 if ( this->sdl_overlay != NULL )
460 SDL_FreeYUVOverlay( this->sdl_overlay );
466 static int consumer_get_dimensions( int *width, int *height )
470 // SDL windows manager structure
473 // Specify the SDL Version
474 SDL_VERSION( &wm.version );
476 // Get the wm structure
477 if ( SDL_GetWMInfo( &wm ) == 1 )
479 // Check that we have the X11 wm
480 if ( wm.subsystem == SDL_SYSWM_X11 )
482 // Get the SDL window
483 Window window = wm.info.x11.window;
485 // Get the display session
486 Display *display = wm.info.x11.display;
488 // Get the window attributes
489 XWindowAttributes attr;
490 XGetWindowAttributes( display, window, &attr );
492 // Determine whether window has changed
493 changed = *width != attr.width || *height != attr.height;
495 // Return width and height
497 *height = attr.height;
504 /** Callback to allow override of the close method.
507 static void consumer_close( mlt_consumer parent )
509 // Get the actual object
510 consumer_sdl this = parent->child;
512 // Kill the thread and clean up
515 pthread_mutex_lock( &this->audio_mutex );
516 pthread_cond_broadcast( &this->audio_cond );
517 pthread_mutex_unlock( &this->audio_mutex );
519 pthread_join( this->thread, NULL );
520 pthread_mutex_destroy( &this->audio_mutex );
521 pthread_cond_destroy( &this->audio_cond );
523 // Now clean up the rest (the close = NULL is a bit nasty but needed for now)
524 parent->close = NULL;
525 mlt_consumer_close( parent );
527 // Finally clean up this