From 867de9e1e00ca39f4ec3a72c2e357c9bc2883ee8 Mon Sep 17 00:00:00 2001 From: j-b-m Date: Sat, 31 Mar 2007 00:06:34 +0000 Subject: [PATCH] Fix slowmotion producer (no more variable speed, but at least it works now). git-svn-id: https://mlt.svn.sourceforge.net/svnroot/mlt/trunk/mlt@961 d19143bc-622f-0410-bfdd-b5b2a6649095 --- src/modules/core/producer_framebuffer.c | 67 ++++++++++++------------------- 1 files changed, 26 insertions(+), 41 deletions(-) diff --git a/src/modules/core/producer_framebuffer.c b/src/modules/core/producer_framebuffer.c index 1f6a487..5aad353 100644 --- a/src/modules/core/producer_framebuffer.c +++ b/src/modules/core/producer_framebuffer.c @@ -27,7 +27,12 @@ #include #include -// Image stack(able) method +// Forward references. +static int producer_get_frame( mlt_producer this, mlt_frame_ptr frame, int index ); + +/** Image stack(able) method +*/ + static int framebuffer_get_image( mlt_frame this, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable ) { @@ -37,7 +42,6 @@ static int framebuffer_get_image( mlt_frame this, uint8_t **image, mlt_image_for mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer ); - // Frame properties objects mlt_properties frame_properties = MLT_FRAME_PROPERTIES( this ); mlt_properties first_frame_properties = MLT_FRAME_PROPERTIES( first_frame ); @@ -95,7 +99,7 @@ static int framebuffer_get_image( mlt_frame this, uint8_t **image, mlt_image_for return 0; } -static int framebuffer_get_frame( mlt_producer this, mlt_frame_ptr frame, int index ) +static int producer_get_frame( mlt_producer this, mlt_frame_ptr frame, int index ) { // Construct a new frame *frame = mlt_frame_init( ); @@ -110,25 +114,19 @@ static int framebuffer_get_frame( mlt_producer this, mlt_frame_ptr frame, int in // Get the real producer mlt_producer real_producer = mlt_properties_get_data( properties, "producer", NULL ); - // Our "in" needs to be the same, keep it so - mlt_properties_pass_list( MLT_PRODUCER_PROPERTIES( real_producer ), properties, "in" ); - // get properties - int strobe = mlt_properties_get_int( MLT_PRODUCER_PROPERTIES (this), "strobe"); - double freeze = mlt_properties_get_double( MLT_PRODUCER_PROPERTIES (this), "freeze"); - int freeze_after = mlt_properties_get_int( MLT_PRODUCER_PROPERTIES (this), "freeze_after"); - int freeze_before = mlt_properties_get_int( MLT_PRODUCER_PROPERTIES (this), "freeze_before"); + int strobe = mlt_properties_get_int( properties, "strobe"); + int freeze = mlt_properties_get_int( properties, "freeze"); + int freeze_after = mlt_properties_get_int( properties, "freeze_after"); + int freeze_before = mlt_properties_get_int( properties, "freeze_before"); mlt_position need_first; if (!freeze || freeze_after || freeze_before) { double prod_speed = mlt_properties_get_double( properties, "_speed"); - double prod_end_speed = mlt_properties_get_double( properties, "end_speed"); + double actual_position = prod_speed * (double) mlt_producer_position( this ); - // calculate actual speed and position - double actual_speed = prod_speed + ((double)mlt_producer_position( this ) / (double)mlt_producer_get_length(this)) * (prod_end_speed - prod_speed); - double actual_position = actual_speed * (double)mlt_producer_position( this ); - if (mlt_properties_get_int( properties, "reverse")) actual_position = mlt_producer_get_length(this) - actual_position; + if (mlt_properties_get_int( properties, "reverse")) actual_position = mlt_producer_get_playtime(this) - actual_position; if (strobe < 2) { @@ -186,7 +184,10 @@ static int framebuffer_get_frame( mlt_producer this, mlt_frame_ptr frame, int in mlt_producer producer_framebuffer_init( char *arg ) { - mlt_producer this = mlt_producer_new( ); + + mlt_producer this = NULL; + this = calloc( 1, sizeof( struct mlt_producer_s ) ); + mlt_producer_init( this, NULL ); // Wrap fezzik mlt_producer real_producer; @@ -197,9 +198,6 @@ mlt_producer producer_framebuffer_init( char *arg ) * Speed must be appended to the filename with ':'. To play your video at 50%: inigo framebuffer:my_video.mpg:0.5 - * You can have a variabl speed by specifying a start and an end speed: - inigo framebuffer:my_video.mpg:0.5:1.0 - * Stroboscope effect can be obtained by adding a stobe=x parameter, where x is the number of frames that will be ignored. @@ -211,30 +209,23 @@ mlt_producer producer_framebuffer_init( char *arg ) **/ double speed; - double end_speed; + int count; char *props = strdup( arg ); char *ptr = props; count = strcspn( ptr, ":" ); ptr[count] = '\0'; - real_producer = mlt_factory_producer( "fezzik", ptr ); - ptr += count + 1; - ptr += strspn( ptr, ":" ); - count = strcspn( ptr, ":" ); - ptr[count] = '\0'; - speed = atof(ptr); + real_producer = mlt_factory_producer( "fezzik", props ); ptr += count + 1; ptr += strspn( ptr, ":" ); count = strcspn( ptr, ":" ); ptr[count] = '\0'; - end_speed = atof(ptr); + speed = atof(ptr); free( props ); - - // If no end speed specified, use constant speed + if (speed == 0.0) speed = 1.0; - if (end_speed == 0.0) end_speed = speed; if ( this != NULL && real_producer != NULL) @@ -250,26 +241,20 @@ mlt_producer producer_framebuffer_init( char *arg ) // Grap some stuff from the real_producer mlt_properties_pass_list( properties, MLT_PRODUCER_PROPERTIES( real_producer ), - "in, out, length, resource" ); + "length,resource,width,height" ); - if (speed != 1.0 || end_speed !=1.0) + if ( speed != 1.0 ) { - // Speed is not 1.0, so adjust the clip length - mlt_position real_out = mlt_properties_get_position(properties, "out"); - mlt_properties_set_position( properties, "out", real_out * 2 / (speed + end_speed)); - mlt_properties_set_position( properties, "length", real_out * 2 / (speed + end_speed) + 1); - mlt_properties_set_double( properties, "_speed", speed); - mlt_properties_set_double( properties, "end_speed", end_speed); + double real_length = (double) mlt_producer_get_length( real_producer ); + mlt_properties_set_position( properties, "length", real_length * 2 / speed ); } - else mlt_properties_set_double( properties, "end_speed", 1.0); // Since we control the seeking, prevent it from seeking on its own mlt_producer_set_speed( real_producer, 0 ); mlt_producer_set_speed( this, speed ); // Override the get_frame method - this->get_frame = framebuffer_get_frame; - + this->get_frame = producer_get_frame; } else { -- 1.7.4.4