]> git.sesse.net Git - mlt/blobdiff - src/modules/sdl/consumer_sdl.c
Attempt at an aspect ratio clean up
[mlt] / src / modules / sdl / consumer_sdl.c
index ee62a2d7ac7e2ef26c0db1b36908f43381ae1f23..b707f78696d89d0bf5bccae0260f3c9e2fb8dc75 100644 (file)
@@ -27,7 +27,7 @@
 #include <pthread.h>
 #include <SDL/SDL.h>
 #include <SDL/SDL_syswm.h>
-#include <sys/timeb.h>
+#include <sys/time.h>
 
 /** This classes definition.
 */
@@ -40,20 +40,26 @@ struct consumer_sdl_s
        mlt_properties properties;
        mlt_deque queue;
        pthread_t thread;
+       int joined;
        int running;
-       uint8_t audio_buffer[ 4096 * 24 ];
+       uint8_t audio_buffer[ 4096 * 10 ];
        int audio_avail;
        pthread_mutex_t audio_mutex;
        pthread_cond_t audio_cond;
+       pthread_mutex_t video_mutex;
+       pthread_cond_t video_cond;
        int window_width;
        int window_height;
        float aspect_ratio;
+       float display_aspect;
+       double last_frame_aspect;
        int width;
        int height;
        int playing;
        int sdl_flags;
        SDL_Surface *sdl_screen;
        SDL_Overlay *sdl_overlay;
+       SDL_Rect rect;
        uint8_t *buffer;
 };
 
@@ -66,6 +72,7 @@ static int consumer_is_stopped( mlt_consumer parent );
 static void consumer_close( mlt_consumer parent );
 static void *consumer_thread( void * );
 static int consumer_get_dimensions( int *width, int *height );
+static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
 
 /** This is what will be called by the factory - anything can be passed in
        via the argument, but keep it simple.
@@ -98,15 +105,29 @@ mlt_consumer consumer_sdl_init( char *arg )
                // This is the initialisation of the consumer
                pthread_mutex_init( &this->audio_mutex, NULL );
                pthread_cond_init( &this->audio_cond, NULL);
+               pthread_mutex_init( &this->video_mutex, NULL );
+               pthread_cond_init( &this->video_cond, NULL);
                
                // Default scaler (for now we'll use nearest)
                mlt_properties_set( this->properties, "rescale", "nearest" );
 
+               // Default buffer for low latency
+               mlt_properties_set_int( this->properties, "buffer", 1 );
+
                // Default progressive true
-               mlt_properties_set_int( this->properties, "progressive", 1 );
+               mlt_properties_set_int( this->properties, "progressive", 0 );
+
+               // Default audio buffer
+               mlt_properties_set_int( this->properties, "audio_buffer", 1024 );
 
-               // Get aspect ratio
+               // Get sample aspect ratio
                this->aspect_ratio = mlt_properties_get_double( this->properties, "aspect_ratio" );
+
+               // Ensure we don't join on a non-running object
+               this->joined = 1;
+               
+               // Default display aspect ratio
+               this->display_aspect = 4.0 / 3.0;
                
                // process actual param
                if ( arg == NULL || sscanf( arg, "%dx%d", &this->width, &this->height ) != 2 )
@@ -116,17 +137,20 @@ mlt_consumer consumer_sdl_init( char *arg )
                }
 
                // Default window size
-               this->window_width = (int)( (float)this->height * this->aspect_ratio ) + 1;
+               this->window_width = ( float )this->height * this->display_aspect;
                this->window_height = this->height;
-               
+
                // Set the sdl flags
-               this->sdl_flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL | SDL_RESIZABLE;
+               this->sdl_flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL | SDL_RESIZABLE | SDL_DOUBLEBUF;
 
                // Allow thread to be started/stopped
                parent->start = consumer_start;
                parent->stop = consumer_stop;
                parent->is_stopped = consumer_is_stopped;
 
+               // Register specific events
+               mlt_events_register( this->properties, "consumer-sdl-event", ( mlt_transmitter )consumer_sdl_event );
+
                // Return the consumer produced
                return parent;
        }
@@ -138,14 +162,37 @@ mlt_consumer consumer_sdl_init( char *arg )
        return NULL;
 }
 
+static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
+{
+       if ( listener != NULL )
+               listener( owner, this, ( SDL_Event * )args[ 0 ] );
+}
+
 int consumer_start( mlt_consumer parent )
 {
        consumer_sdl this = parent->child;
 
        if ( !this->running )
        {
+               pthread_attr_t thread_attributes;
+               
+               consumer_stop( parent );
+
                this->running = 1;
-               pthread_create( &this->thread, NULL, consumer_thread, this );
+               this->joined = 0;
+
+               // Allow the user to force resizing to window size
+               if ( mlt_properties_get_int( this->properties, "resize" ) )
+               {
+                       mlt_properties_set_int( this->properties, "width", this->width );
+                       mlt_properties_set_int( this->properties, "height", this->height );
+               }
+
+               // Inherit the scheduling priority
+               pthread_attr_init( &thread_attributes );
+               pthread_attr_setinheritsched( &thread_attributes, PTHREAD_INHERIT_SCHED );
+
+               pthread_create( &this->thread, &thread_attributes, consumer_thread, this );
        }
 
        return 0;
@@ -156,7 +203,7 @@ int consumer_stop( mlt_consumer parent )
        // Get the actual object
        consumer_sdl this = parent->child;
 
-       if ( this->running )
+       if ( this->joined == 0 )
        {
                // Kill the thread and clean up
                this->running = 0;
@@ -166,6 +213,7 @@ int consumer_stop( mlt_consumer parent )
                pthread_mutex_unlock( &this->audio_mutex );
 
                pthread_join( this->thread, NULL );
+               this->joined = 1;
        }
 
        return 0;
@@ -206,7 +254,7 @@ static void sdl_fill_audio( void *udata, uint8_t *stream, int len )
        if ( this->audio_avail >= len )
        {
                // Place in the audio buffer
-               SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
+               memcpy( stream, this->audio_buffer, len );
 
                // Remove len from the audio available
                this->audio_avail -= len;
@@ -243,11 +291,9 @@ static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_aud
        mlt_audio_format afmt = mlt_audio_pcm;
 
        // Set the preferred params of the test card signal
-       int channels = 2;
-       int frequency = 48000;
+       int channels = mlt_properties_get_int( properties, "channels" );
+       int frequency = mlt_properties_get_int( properties, "frequency" );
        static int counter = 0;
-       if ( mlt_properties_get_int( properties, "frequency" ) != 0 )
-               frequency =  mlt_properties_get_int( properties, "frequency" );
 
        int samples = mlt_sample_calculator( mlt_properties_get_double( this->properties, "fps" ), frequency, counter++ );
        
@@ -260,6 +306,7 @@ static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_aud
        if ( mlt_properties_get_int( properties, "audio_off" ) )
        {
                this->playing = 1;
+               init_audio = 1;
                return init_audio;
        }
 
@@ -268,19 +315,20 @@ static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_aud
                SDL_AudioSpec request;
                SDL_AudioSpec got;
 
+               int audio_buffer = mlt_properties_get_int( properties, "audio_buffer" );
+
                // specify audio format
                memset( &request, 0, sizeof( SDL_AudioSpec ) );
                this->playing = 0;
                request.freq = frequency;
                request.format = AUDIO_S16;
                request.channels = channels;
-               request.samples = 2048;
+               request.samples = audio_buffer;
                request.callback = sdl_fill_audio;
                request.userdata = (void *)this;
                if ( SDL_OpenAudio( &request, &got ) != 0 )
                {
                        fprintf( stderr, "SDL failed to open audio: %s\n", SDL_GetError() );
-                       mlt_properties_set_int( properties, "audio_off", 1 );
                        init_audio = 2;
                }
                else if ( got.size != 0 )
@@ -292,16 +340,19 @@ static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_aud
 
        if ( init_audio == 0 )
        {
+               mlt_properties properties = mlt_frame_properties( frame );
                bytes = ( samples * channels * 2 );
                pthread_mutex_lock( &this->audio_mutex );
-               while ( bytes > ( sizeof( this->audio_buffer) - this->audio_avail ) )
+               while ( this->running && bytes > ( sizeof( this->audio_buffer) - this->audio_avail ) )
                        pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
-               mlt_properties properties = mlt_frame_properties( frame );
-               if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
-                       memcpy( &this->audio_buffer[ this->audio_avail ], pcm, bytes );
-               else
-                       memset( &this->audio_buffer[ this->audio_avail ], 0, bytes );
-               this->audio_avail += bytes;
+               if ( this->running )
+               {
+                       if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
+                               memcpy( &this->audio_buffer[ this->audio_avail ], pcm, bytes );
+                       else
+                               memset( &this->audio_buffer[ this->audio_avail ], 0, bytes );
+                       this->audio_avail += bytes;
+               }
                pthread_cond_broadcast( &this->audio_cond );
                pthread_mutex_unlock( &this->audio_mutex );
        }
@@ -313,9 +364,8 @@ static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_aud
        return init_audio;
 }
 
-static int consumer_play_video( consumer_sdl this, mlt_frame frame, int64_t elapsed, int64_t playtime )
+static int consumer_play_video( consumer_sdl this, mlt_frame frame )
 {
-       int error = 0;
        // Get the properties of this consumer
        mlt_properties properties = this->properties;
 
@@ -323,98 +373,24 @@ static int consumer_play_video( consumer_sdl this, mlt_frame frame, int64_t elap
        int width = this->width, height = this->height;
        uint8_t *image;
        int changed = 0;
-       struct timeb now;
-       ftime( &now );
-       int64_t start = ( ( int64_t )now.time * 1000 + now.millitm );
-
-       if ( mlt_properties_get_int( properties, "video_off" ) )
-       {
-               mlt_frame_close( frame );
-               return 0;
-       }
-
-       if ( frame != NULL )
-       {
-               // Set playtime
-               mlt_properties_set_position( mlt_frame_properties( frame ), "playtime", playtime );
-               mlt_properties_set_double( mlt_frame_properties( frame ), "consumer_scale", ( double )height / mlt_properties_get_double( properties, "height" ) );
-
-               // Push this frame to the back of the queue
-               mlt_deque_push_back( this->queue, frame );
-       }
 
-       if ( this->playing )
-       {
-               // We might want to use an old frame if the current frame is skipped
-               mlt_frame candidate = NULL;
-               frame = NULL;
-
-               while ( frame == NULL && mlt_deque_count( this->queue ) )
-               {
-                       frame = mlt_deque_peek_front( this->queue );
-                       playtime = mlt_properties_get_position( mlt_frame_properties( frame ), "playtime" );
-
-                       // Check if frame is in the future or past
-                       if ( playtime > elapsed + 500 )
-                       {
-                               // Too far in the future - play it now
-                               frame = mlt_deque_pop_front( this->queue );
-                       }
-                       else if ( playtime > elapsed + 160 )
-                       {
-                               // Time to squeeze a few more frames in
-                               frame = candidate;
-                               candidate = NULL;
-                               error = 1;
-                               break;
-                       }
-                       else if ( playtime < elapsed )
-                       {
-                               if ( candidate != NULL )
-                                       mlt_frame_close( candidate );
-                               candidate = mlt_deque_pop_front( this->queue );
-                               frame = NULL;
-                       }
-                       else
-                       {
-                               // Get the frame at the front of the queue
-                               frame = mlt_deque_pop_front( this->queue );
-                       }
-               }
-
-               if ( frame == NULL )
-                       frame = candidate;
-               else if ( candidate != NULL )
-                       mlt_frame_close( candidate );
-       }
-       else
-       {
-               if ( frame != NULL )
-                       mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
-               frame = NULL;
-       }
-
-       if ( this->playing && frame != NULL )
+       if ( mlt_properties_get_int( properties, "video_off" ) == 0 )
        {
                // Get the image, width and height
+               mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
                mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
-               ftime( &now );
-               elapsed += ( ( int64_t )now.time * 1000 + now.millitm ) - start;
-
-               playtime = mlt_properties_get_position( mlt_frame_properties( frame ), "playtime" );
-               struct timespec slow = { 0, ( playtime - elapsed ) * 1000 };
-               if ( slow.tv_nsec > 50 )
-                       nanosleep( &slow, NULL );
-
+               
                // Handle events
                if ( this->sdl_screen != NULL )
                {
                        SDL_Event event;
        
                        changed = consumer_get_dimensions( &this->window_width, &this->window_height );
-       
+
                        while ( SDL_PollEvent( &event ) )
                        {
+                               mlt_events_fire( this->properties, "consumer-sdl-event", &event, NULL );
+
                                switch( event.type )
                                {
                                        case SDL_VIDEORESIZE:
@@ -422,6 +398,9 @@ static int consumer_play_video( consumer_sdl this, mlt_frame frame, int64_t elap
                                                this->window_height = event.resize.h;
                                                changed = 1;
                                                break;
+                                       case SDL_QUIT:
+                                               this->running = 0;
+                                               break;
                                        case SDL_KEYDOWN:
                                                {
                                                        mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
@@ -438,83 +417,205 @@ static int consumer_play_video( consumer_sdl this, mlt_frame frame, int64_t elap
                        }
                }
        
-               if ( width != this->width || height != this->height )
+               if ( width != this->width || height != this->height || 
+                        ( ( int )( this->last_frame_aspect * 1000 ) != ( int )( mlt_frame_get_aspect_ratio( frame ) * 1000 ) &&
+                        ( mlt_frame_get_aspect_ratio( frame ) != 1.0 || this->last_frame_aspect == 0.0 ) ) )
                {
                        this->width = width;
                        this->height = height;
+                       this->last_frame_aspect = mlt_frame_get_aspect_ratio( frame );
                        changed = 1;
                }
 
-               if ( this->sdl_screen == NULL || changed )
+               if ( this->running && ( this->sdl_screen == NULL || changed ) )
                {
-                       double aspect_ratio = mlt_frame_get_aspect_ratio( frame );
-                       float display_aspect_ratio = (float)width / (float)height;
-                       SDL_Rect rect;
+                       // Force an overlay recreation
+                       if ( this->sdl_overlay != NULL )
+                               SDL_FreeYUVOverlay( this->sdl_overlay );
+
+                       // open SDL window with video overlay, if possible
+                       sdl_lock_display();
+                       this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
+                       sdl_unlock_display();
+                       if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
+                               this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
+                       //SDL_Flip( this->sdl_screen );
+                       mlt_properties_set_int( properties, "changed", 0 );
+
+                       // Determine window's new display aspect ratio
+                       float this_aspect = ( float )this->window_width / this->window_height;
 
-                       if ( mlt_properties_get_double( properties, "aspect_ratio" ) )
-                               aspect_ratio = mlt_properties_get_double( properties, "aspect_ratio" );
+                       // Determine frame's display aspect ratio
+                       float frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
+                       this->width = width;
+                       this->height = height;
 
-                       if ( aspect_ratio == 1 )
+                       // If using hardware scaler
+                       if ( mlt_properties_get( properties, "rescale" ) != NULL &&
+                               !strcmp( mlt_properties_get( properties, "rescale" ), "none" ) )
                        {
-                               rect.w = this->window_width;
-                               rect.h = this->window_height;
+                               // Special case optimisation to negate odd effect of sample aspect ratio
+                               // not corresponding exactly with image resolution.
+                               if ( ( (int)( this_aspect * 1000 ) == (int)( this->display_aspect * 1000 ) ) && 
+                                        ( (int)( mlt_frame_get_aspect_ratio( frame ) * 1000 ) == (int)( this->aspect_ratio * 1000 ) ) )
+                               {
+                                       this->rect.w = this->window_width;
+                                       this->rect.h = this->window_height;
+                               }
+                               else
+                               {
+                                       // Use hardware scaler to normalise display aspect ratio
+                                       this->rect.w = frame_aspect / this_aspect * this->window_width;
+                                       this->rect.h = this->window_height;
+                                       if ( this->rect.w > this->window_width )
+                                       {
+                                               this->rect.w = this->window_width;
+                                               this->rect.h = this_aspect / frame_aspect * this->window_height;
+                                       }
+                               }
                        }
-                       else if ( this->window_width < this->window_height * aspect_ratio )
+                       // Special case optimisation to negate odd effect of sample aspect ratio
+                       // not corresponding exactly with image resolution.
+                       else if ( (int)( this_aspect * 1000 ) == (int)( this->display_aspect * 1000 ) ) 
                        {
-                               rect.w = this->window_width;
-                               rect.h = this->window_width / aspect_ratio;
+                               this->rect.w = this->window_width;
+                               this->rect.h = this->window_height;
                        }
-                       else
+                       // Use hardware scaler to normalise sample aspect ratio
+                       else if ( this->window_height * this->display_aspect > this->window_width )
                        {
-                               rect.w = this->window_height * aspect_ratio;
-                               rect.h = this->window_height;
+                               this->rect.w = this->window_width;
+                               this->rect.h = this->window_width / this->display_aspect;
                        }
-
-                       if ( mlt_properties_get_int( properties, "scale_overlay" ) )
+                       else
                        {
-                               if ( ( float )rect.w * display_aspect_ratio < this->window_width )
-                                       rect.w = ( int )( ( float )rect.w * display_aspect_ratio );
-                               else if ( ( float )rect.h * display_aspect_ratio < this->window_height )
-                                       rect.h = ( int )( ( float )rect.h * display_aspect_ratio );
+                               this->rect.w = this->window_height * this->display_aspect;
+                               this->rect.h = this->window_height;
                        }
+                       
+                       this->rect.x = ( this->window_width - this->rect.w ) / 2;
+                       this->rect.y = ( this->window_height - this->rect.h ) / 2;
 
-                       rect.x = ( this->window_width - rect.w ) / 2;
-                       rect.y = ( this->window_height - rect.h ) / 2;
-
-                       // Force an overlay recreation
-                       if ( this->sdl_overlay != NULL )
-                               SDL_FreeYUVOverlay( this->sdl_overlay );
-
-                       // open SDL window with video overlay, if possible
-                       this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
+                       mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
+                       mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
+                       mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
+                       mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
 
                        if ( this->sdl_screen != NULL )
                        {
-                               SDL_SetClipRect( this->sdl_screen, &rect );
-                       
+                               SDL_SetClipRect( this->sdl_screen, &this->rect );
                                sdl_lock_display();
-                               this->sdl_overlay = SDL_CreateYUVOverlay( this->width - (this->width % 4), this->height- (this->height % 2 ), SDL_YUY2_OVERLAY, this->sdl_screen );
+                               this->sdl_overlay = SDL_CreateYUVOverlay( this->width, this->height, SDL_YUY2_OVERLAY, this->sdl_screen );
                                sdl_unlock_display();
                        }
                }
-                       
+               else if ( mlt_properties_get_int( properties, "changed" ) )
+               {
+                       sdl_lock_display();
+                       this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
+                       SDL_SetClipRect( this->sdl_screen, &this->rect );
+                       //SDL_Flip( this->sdl_screen );
+                       sdl_unlock_display();
+                       mlt_properties_set_int( properties, "changed", 0 );
+               }
+
                if ( this->sdl_screen != NULL && this->sdl_overlay != NULL )
                {
                        this->buffer = this->sdl_overlay->pixels[ 0 ];
+                       sdl_lock_display();
                        if ( SDL_LockYUVOverlay( this->sdl_overlay ) >= 0 )
                        {
-                               memcpy( this->buffer, image, width * height * 2 );
+                               if ( image != NULL )
+                                       memcpy( this->buffer, image, width * height * 2 );
                                SDL_UnlockYUVOverlay( this->sdl_overlay );
                                SDL_DisplayYUVOverlay( this->sdl_overlay, &this->sdl_screen->clip_rect );
                        }
+                       sdl_unlock_display();
                }
        }
 
-       // Close the frame
-       if ( frame != NULL )
-               mlt_frame_close( frame );
+       return 0;
+}
+
+static void *video_thread( void *arg )
+{
+       // Identify the arg
+       consumer_sdl this = arg;
+
+       // Obtain time of thread start
+       struct timeval now;
+       int64_t start = 0;
+       int64_t elapsed = 0;
+       struct timespec tm;
+       mlt_frame next = NULL;
+       mlt_properties properties = NULL;
+       double speed = 0;
+
+       // Get real time flag
+       int real_time = mlt_properties_get_int( this->properties, "real_time" );
+
+       // Get the current time
+       gettimeofday( &now, NULL );
+
+       // Determine start time
+       start = ( int64_t )now.tv_sec * 1000000 + now.tv_usec;
+
+       while ( this->running )
+       {
+               // Pop the next frame
+               pthread_mutex_lock( &this->video_mutex );
+               while ( ( next = mlt_deque_pop_front( this->queue ) ) == NULL && this->running )
+                       pthread_cond_wait( &this->video_cond, &this->video_mutex );
+               pthread_mutex_unlock( &this->video_mutex );
+
+               // Get the properties
+               properties =  mlt_frame_properties( next );
+
+               // Get the speed of the frame
+               speed = mlt_properties_get_double( properties, "_speed" );
+
+               // Get the current time
+               gettimeofday( &now, NULL );
+
+               // Get the elapsed time
+               elapsed = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - start;
+
+               // See if we have to delay the display of the current frame
+               if ( mlt_properties_get_int( properties, "rendered" ) == 1 && this->running )
+               {
+                       // Obtain the scheduled playout time
+                       mlt_position scheduled = mlt_properties_get_position( properties, "playtime" );
+
+                       // Determine the difference between the elapsed time and the scheduled playout time
+                       mlt_position difference = scheduled - elapsed;
+
+                       // Smooth playback a bit
+                       if ( real_time && ( difference > 20000 && speed == 1.0 ) )
+                       {
+                               tm.tv_sec = difference / 1000000;
+                               tm.tv_nsec = ( difference % 1000000 ) * 500;
+                               nanosleep( &tm, NULL );
+                       }
+
+                       // Show current frame if not too old
+                       if ( !real_time || ( difference > -10000 || speed != 1.0 || mlt_deque_count( this->queue ) < 2 ) )
+                               consumer_play_video( this, next );
+
+                       // If the queue is empty, recalculate start to allow build up again
+                       if ( real_time && ( mlt_deque_count( this->queue ) == 0 && speed == 1.0 ) )
+                       {
+                               gettimeofday( &now, NULL );
+                               start = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - scheduled + 20000;
+                       }
+               }
 
-       return error;
+               // This frame can now be closed
+               mlt_frame_close( next );
+       }
+
+       mlt_consumer_stopped( &this->parent );
+
+       return NULL;
 }
 
 /** Threaded wrapper for pipe.
@@ -528,80 +629,98 @@ static void *consumer_thread( void *arg )
        // Get the consumer
        mlt_consumer consumer = &this->parent;
 
+       // Video thread
+       pthread_t thread;
+
        // internal intialization
        int init_audio = 1;
-
-       // Obtain time of thread start
-       struct timeb now;
-       int64_t start = 0;
-       int64_t elapsed = 0;
+       int init_video = 1;
+       mlt_frame frame = NULL;
+       mlt_properties properties = NULL;
        int duration = 0;
        int64_t playtime = 0;
+       struct timespec tm = { 0, 100000 };
 
-       // Initialise the SDL subsystem
-       if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_NOPARACHUTE ) < 0 )
+       if ( mlt_properties_get_int( mlt_consumer_properties( consumer ), "sdl_started" ) == 0 )
        {
-               fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
-               return NULL;
+               if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE ) < 0 )
+               {
+                       fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
+                       return NULL;
+               }
+
+               SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
+               SDL_EnableUNICODE( 1 );
+       }
+       else
+       {
+               if ( SDL_GetVideoSurface( ) != NULL )
+                       consumer_get_dimensions( &this->window_width, &this->window_height );
        }
 
-       // Additional initialisation
-       SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
-       SDL_EnableUNICODE( 1 );
+       if ( !mlt_properties_get_int( mlt_consumer_properties( consumer ), "audio_off" ) )
+               SDL_InitSubSystem( SDL_INIT_AUDIO );
 
        // Loop until told not to
        while( this->running )
        {
                // Get a frame from the attached producer
-               mlt_frame frame = mlt_consumer_get_frame( consumer );
-               mlt_frame video_frame = frame;
-               int done = 0;
+               frame = mlt_consumer_rt_frame( consumer );
 
                // Ensure that we have a frame
-               while ( !done )
+               if ( frame != NULL )
                {
+                       // Get the frame properties
+                       properties =  mlt_frame_properties( frame );
+
                        // Play audio
-                       if ( sizeof( this->audio_buffer ) - this->audio_avail > 8192 || mlt_deque_count( this->queue ) == 1 )
-                       {
-                               init_audio = consumer_play_audio( this, frame, init_audio, &duration );
-                               done = 1;
-                       }
+                       init_audio = consumer_play_audio( this, frame, init_audio, &duration );
 
-                       if ( this->playing )
+                       // Determine the start time now
+                       if ( this->playing && init_video )
                        {
-                               // Get the current time
-                               ftime( &now );
+                               // Create the video thread
+                               pthread_create( &thread, NULL, video_thread, this );
 
-                               // Determine elapsed time
-                               if ( start == 0 )
-                                       start = ( int64_t )now.time * 1000 + now.millitm;
-                               else
-                                       elapsed = ( ( int64_t )now.time * 1000 + now.millitm ) - start;
+                               // Video doesn't need to be initialised any more
+                               init_video = 0;
                        }
 
-                       if ( consumer_play_video( this, video_frame, elapsed, playtime ) )
-                       {
-                               if ( !done )
-                               {
-                                       init_audio = consumer_play_audio( this, frame, init_audio, &duration );
-                                       done = 1;
-                               }
-                       }
+                       // Set playtime for this frame
+                       mlt_properties_set_position( properties, "playtime", playtime );
 
-                       if ( video_frame != NULL )
-                       {
-                               video_frame = NULL;
-                               playtime += duration;
-                       }
+                       while ( this->running && mlt_deque_count( this->queue ) > 15 )
+                               nanosleep( &tm, NULL );
+
+                       // Push this frame to the back of the queue
+                       pthread_mutex_lock( &this->video_mutex );
+                       mlt_deque_push_back( this->queue, frame );
+                       pthread_cond_broadcast( &this->video_cond );
+                       pthread_mutex_unlock( &this->video_mutex );
+
+                       // Calculate the next playtime
+                       playtime += ( duration * 1000 );
                }
        }
 
+       // Kill the video thread
+       if ( init_video == 0 )
+       {
+               pthread_mutex_lock( &this->video_mutex );
+               pthread_cond_broadcast( &this->video_cond );
+               pthread_mutex_unlock( &this->video_mutex );
+               pthread_join( thread, NULL );
+       }
+
        // internal cleanup
-       if ( init_audio == 0 )
-               SDL_AudioQuit( );
        if ( this->sdl_overlay != NULL )
                SDL_FreeYUVOverlay( this->sdl_overlay );
-       SDL_Quit( );
+
+       if ( !mlt_properties_get_int( mlt_consumer_properties( consumer ), "audio_off" ) )
+               SDL_QuitSubSystem( SDL_INIT_AUDIO );
+
+       if ( mlt_properties_get_int( mlt_consumer_properties( consumer ), "sdl_started" ) == 0 )
+               SDL_Quit( );
 
        while( mlt_deque_count( this->queue ) )
                mlt_frame_close( mlt_deque_pop_back( this->queue ) );
@@ -623,6 +742,9 @@ static int consumer_get_dimensions( int *width, int *height )
        // Specify the SDL Version
        SDL_VERSION( &wm.version );
 
+       // Lock the display
+       sdl_lock_display();
+
        // Get the wm structure
        if ( SDL_GetWMInfo( &wm ) == 1 )
        {
@@ -648,6 +770,9 @@ static int consumer_get_dimensions( int *width, int *height )
                }
        }
 
+       // Unlock the display
+       sdl_lock_display();
+
        return changed;
 }
 
@@ -662,6 +787,9 @@ static void consumer_close( mlt_consumer parent )
        // Stop the consumer
        mlt_consumer_stop( parent );
 
+       // Close the queue
+       mlt_deque_close( this->queue );
+
        // Destroy mutexes
        pthread_mutex_destroy( &this->audio_mutex );
        pthread_cond_destroy( &this->audio_cond );
@@ -672,4 +800,3 @@ static void consumer_close( mlt_consumer parent )
        // Finally clean up this
        free( this );
 }
-