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producer_melt.c
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producer_melt.c
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/*
* producer_melt.c -- load from melt command line syntax
* Copyright (C) 2003-2004 Ushodaya Enterprises Limited
* Author: Charles Yates <charles.yates@pandora.be>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <framework/mlt.h>
#define MELT_FILE_MAX_LINES (100000)
#define MELT_FILE_MAX_LENGTH (2048)
mlt_producer producer_melt_init( mlt_profile profile, mlt_service_type type, const char *id, char **argv );
mlt_producer producer_melt_file_init( mlt_profile profile, mlt_service_type type, const char *id, char *file )
{
// Convert file name string encoding.
mlt_properties properties = mlt_properties_new();
mlt_properties_set( properties, "filename", filename );
mlt_properties_from_utf8( properties, "filename", "_filename" );
file = mlt_properties_get( properties, "_filename" );
mlt_properties_close( properties );
FILE *input = fopen( file, "r" );
char **args = calloc( sizeof( char * ), MELT_FILE_MAX_LINES );
int count = 0;
char temp[ MELT_FILE_MAX_LENGTH ];
if ( input != NULL )
{
while( fgets( temp, MELT_FILE_MAX_LENGTH, input ) && count < MELT_FILE_MAX_LINES )
{
if ( temp[ strlen( temp ) - 1 ] != '\n' )
mlt_log_warning( NULL, "Exceeded maximum line length (%d) while reading a melt file.\n", MELT_FILE_MAX_LENGTH );
temp[ strlen( temp ) - 1 ] = '\0';
if ( strcmp( temp, "" ) )
args[ count ++ ] = strdup( temp );
}
fclose( input );
if ( count == MELT_FILE_MAX_LINES )
mlt_log_warning( NULL, "Reached the maximum number of lines (%d) while reading a melt file.\n"
"Consider using MLT XML.\n", MELT_FILE_MAX_LINES );
}
mlt_producer result = producer_melt_init( profile, type, id, args );
if ( result != NULL )
{
mlt_properties properties = MLT_PRODUCER_PROPERTIES( result );
mlt_properties_set( properties, "resource", file );
}
while( count -- )
free( args[ count ] );
free( args );
return result;
}
static void track_service( mlt_field field, void *service, mlt_destructor destructor )
{
mlt_properties properties = mlt_field_properties( field );
int registered = mlt_properties_get_int( properties, "registered" );
char *key = mlt_properties_get( properties, "registered" );
mlt_properties_set_data( properties, key, service, 0, destructor, NULL );
mlt_properties_set_int( properties, "registered", ++ registered );
}
static mlt_producer create_producer( mlt_profile profile, mlt_field field, char *file )
{
mlt_producer result = mlt_factory_producer( profile, NULL, file );
if ( result != NULL )
track_service( field, result, ( mlt_destructor )mlt_producer_close );
return result;
}
static mlt_filter create_attach( mlt_profile profile, mlt_field field, char *id, int track )
{
char *temp = strdup( id );
char *arg = strchr( temp, ':' );
if ( arg != NULL )
*arg ++ = '\0';
mlt_filter filter = mlt_factory_filter( profile, temp, arg );
if ( filter != NULL )
track_service( field, filter, ( mlt_destructor )mlt_filter_close );
free( temp );
return filter;
}
static mlt_filter create_filter( mlt_profile profile, mlt_field field, char *id, int track )
{
char *temp = strdup( id );
char *arg = strchr( temp, ':' );
if ( arg != NULL )
*arg ++ = '\0';
mlt_filter filter = mlt_factory_filter( profile, temp, arg );
if ( filter != NULL )
{
mlt_field_plant_filter( field, filter, track );
track_service( field, filter, ( mlt_destructor )mlt_filter_close );
}
free( temp );
return filter;
}
static mlt_transition create_transition( mlt_profile profile, mlt_field field, char *id, int track )
{
char *arg = strchr( id, ':' );
if ( arg != NULL )
*arg ++ = '\0';
mlt_transition transition = mlt_factory_transition( profile, id, arg );
if ( transition != NULL )
{
mlt_field_plant_transition( field, transition, track, track + 1 );
track_service( field, transition, ( mlt_destructor )mlt_transition_close );
}
return transition;
}
mlt_producer producer_melt_init( mlt_profile profile, mlt_service_type type, const char *id, char **argv )
{
int i;
int track = 0;
mlt_producer producer = NULL;
mlt_tractor mix = NULL;
mlt_playlist playlist = mlt_playlist_new( profile );
mlt_properties group = mlt_properties_new( );
mlt_tractor tractor = mlt_tractor_new( );
mlt_properties properties = MLT_TRACTOR_PROPERTIES( tractor );
mlt_field field = mlt_tractor_field( tractor );
mlt_properties field_properties = mlt_field_properties( field );
mlt_multitrack multitrack = mlt_tractor_multitrack( tractor );
char *title = NULL;
// Assistance for template construction (allows -track usage to specify the first track)
mlt_properties_set_int( MLT_PLAYLIST_PROPERTIES( playlist ), "_melt_first", 1 );
// We need to track the number of registered filters
mlt_properties_set_int( field_properties, "registered", 0 );
// Parse the arguments
if ( argv )
for ( i = 0; argv[ i ] != NULL; i ++ )
{
if ( argv[ i + 1 ] == NULL && (
!strcmp( argv[ i ], "-attach" ) ||
!strcmp( argv[ i ], "-attach-cut" ) ||
!strcmp( argv[ i ], "-attach-track" ) ||
!strcmp( argv[ i ], "-attach-clip" ) ||
!strcmp( argv[ i ], "-repeat" ) ||
!strcmp( argv[ i ], "-split" ) ||
!strcmp( argv[ i ], "-join" ) ||
!strcmp( argv[ i ], "-mixer" ) ||
!strcmp( argv[ i ], "-mix" ) ||
!strcmp( argv[ i ], "-filter" ) ||
!strcmp( argv[ i ], "-transition" ) ||
!strcmp( argv[ i ], "-blank" ) ) )
{
fprintf( stderr, "Argument missing for %s.\n", argv[ i ] );
break;
}
if ( !strcmp( argv[ i ], "-group" ) )
{
if ( mlt_properties_count( group ) != 0 )
{
mlt_properties_close( group );
group = mlt_properties_new( );
}
if ( group != NULL )
properties = group;
}
else if ( !strcmp( argv[ i ], "-attach" ) ||
!strcmp( argv[ i ], "-attach-cut" ) ||
!strcmp( argv[ i ], "-attach-track" ) ||
!strcmp( argv[ i ], "-attach-clip" ) )
{
int type = !strcmp( argv[ i ], "-attach" ) ? 0 :
!strcmp( argv[ i ], "-attach-cut" ) ? 1 :
!strcmp( argv[ i ], "-attach-track" ) ? 2 : 3;
mlt_filter filter = create_attach( profile, field, argv[ ++ i ], track );
if ( producer != NULL && !mlt_producer_is_cut( producer ) )
{
mlt_playlist_clip_info info;
mlt_playlist_append( playlist, producer );
mlt_playlist_get_clip_info( playlist, &info, mlt_playlist_count( playlist ) - 1 );
producer = info.cut;
}
if ( type == 1 || type == 2 )
{
mlt_playlist_clip_info info;
mlt_playlist_get_clip_info( playlist, &info, mlt_playlist_count( playlist ) - 1 );
producer = info.cut;
}
if ( filter != NULL && mlt_playlist_count( playlist ) > 0 )
{
if ( type == 0 )
mlt_service_attach( ( mlt_service )properties, filter );
else if ( type == 1 )
mlt_service_attach( ( mlt_service )producer, filter );
else if ( type == 2 )
mlt_service_attach( ( mlt_service )playlist, filter );
else if ( type == 3 )
mlt_service_attach( ( mlt_service )mlt_producer_cut_parent( producer ), filter );
properties = MLT_FILTER_PROPERTIES( filter );
mlt_properties_inherit( properties, group );
}
else if ( filter != NULL )
{
mlt_service_attach( ( mlt_service )playlist, filter );
properties = MLT_FILTER_PROPERTIES( filter );
mlt_properties_inherit( properties, group );
}
}
else if ( !strcmp( argv[ i ], "-repeat" ) )
{
int repeat = atoi( argv[ ++ i ] );
if ( producer != NULL && !mlt_producer_is_cut( producer ) )
mlt_playlist_append( playlist, producer );
producer = NULL;
if ( mlt_playlist_count( playlist ) > 0 )
{
mlt_playlist_clip_info info;
mlt_playlist_repeat_clip( playlist, mlt_playlist_count( playlist ) - 1, repeat );
mlt_playlist_get_clip_info( playlist, &info, mlt_playlist_count( playlist ) - 1 );
producer = info.cut;
properties = MLT_PRODUCER_PROPERTIES( producer );
}
}
else if ( !strcmp( argv[ i ], "-split" ) )
{
int split = atoi( argv[ ++ i ] );
if ( producer != NULL && !mlt_producer_is_cut( producer ) )
mlt_playlist_append( playlist, producer );
producer = NULL;
if ( mlt_playlist_count( playlist ) > 0 )
{
mlt_playlist_clip_info info;
mlt_playlist_get_clip_info( playlist, &info, mlt_playlist_count( playlist ) - 1 );
split = split < 0 ? info.frame_out + split : split;
mlt_playlist_split( playlist, mlt_playlist_count( playlist ) - 1, split );
mlt_playlist_get_clip_info( playlist, &info, mlt_playlist_count( playlist ) - 1 );
producer = info.cut;
properties = MLT_PRODUCER_PROPERTIES( producer );
}
}
else if ( !strcmp( argv[ i ], "-swap" ) )
{
if ( producer != NULL && !mlt_producer_is_cut( producer ) )
mlt_playlist_append( playlist, producer );
producer = NULL;
if ( mlt_playlist_count( playlist ) >= 2 )
{
mlt_playlist_clip_info info;
mlt_playlist_move( playlist, mlt_playlist_count( playlist ) - 2, mlt_playlist_count( playlist ) - 1 );
mlt_playlist_get_clip_info( playlist, &info, mlt_playlist_count( playlist ) - 1 );
producer = info.cut;
properties = MLT_PRODUCER_PROPERTIES( producer );
}
}
else if ( !strcmp( argv[ i ], "-join" ) )
{
int clips = atoi( argv[ ++ i ] );
if ( producer != NULL && !mlt_producer_is_cut( producer ) )
mlt_playlist_append( playlist, producer );
producer = NULL;
if ( mlt_playlist_count( playlist ) > 0 )
{
mlt_playlist_clip_info info;
int clip = clips <= 0 ? 0 : mlt_playlist_count( playlist ) - clips - 1;
if ( clip < 0 ) clip = 0;
if ( clip >= mlt_playlist_count( playlist ) ) clip = mlt_playlist_count( playlist ) - 2;
if ( clips < 0 ) clips = mlt_playlist_count( playlist ) - 1;
mlt_playlist_join( playlist, clip, clips, 0 );
mlt_playlist_get_clip_info( playlist, &info, mlt_playlist_count( playlist ) - 1 );
producer = info.cut;
properties = MLT_PRODUCER_PROPERTIES( producer );
}
}
else if ( !strcmp( argv[ i ], "-remove" ) )
{
if ( producer != NULL && !mlt_producer_is_cut( producer ) )
mlt_playlist_append( playlist, producer );
producer = NULL;
if ( mlt_playlist_count( playlist ) > 0 )
{
mlt_playlist_clip_info info;
mlt_playlist_remove( playlist, mlt_playlist_count( playlist ) - 1 );
mlt_playlist_get_clip_info( playlist, &info, mlt_playlist_count( playlist ) - 1 );
producer = info.cut;
properties = MLT_PRODUCER_PROPERTIES( producer );
}
}
else if ( !strcmp( argv[ i ], "-mix" ) )
{
int length = atoi( argv[ ++ i ] );
if ( producer != NULL && !mlt_producer_is_cut( producer ) )
mlt_playlist_append( playlist, producer );
producer = NULL;
if ( mlt_playlist_count( playlist ) >= 2 )
{
if ( mlt_playlist_mix( playlist, mlt_playlist_count( playlist ) - 2, length, NULL ) == 0 )
{
mlt_playlist_clip_info info;
mlt_playlist_get_clip_info( playlist, &info, mlt_playlist_count( playlist ) - 1 );
if ( mlt_properties_get_data( ( mlt_properties )info.producer, "mlt_mix", NULL ) == NULL )
mlt_playlist_get_clip_info( playlist, &info, mlt_playlist_count( playlist ) - 2 );
mix = ( mlt_tractor )mlt_properties_get_data( ( mlt_properties )info.producer, "mlt_mix", NULL );
properties = NULL;
}
else
{
fprintf( stderr, "Mix failed?\n" );
}
}
else
{
fprintf( stderr, "Invalid position for a mix...\n" );
}
}
else if ( !strcmp( argv[ i ], "-mixer" ) )
{
if ( mix != NULL )
{
char *id = strdup( argv[ ++ i ] );
char *arg = strchr( id, ':' );
mlt_field field = mlt_tractor_field( mix );
mlt_transition transition = NULL;
if ( arg != NULL )
*arg ++ = '\0';
transition = mlt_factory_transition( profile, id, arg );
if ( transition != NULL )
{
properties = MLT_TRANSITION_PROPERTIES( transition );
mlt_properties_inherit( properties, group );
mlt_field_plant_transition( field, transition, 0, 1 );
mlt_properties_set_position( properties, "in", 0 );
mlt_properties_set_position( properties, "out", mlt_producer_get_out( ( mlt_producer )mix ) );
mlt_transition_close( transition );
}
free( id );
}
else
{
fprintf( stderr, "Invalid mixer...\n" );
}
}
else if ( !strcmp( argv[ i ], "-filter" ) )
{
mlt_filter filter = create_filter( profile, field, argv[ ++ i ], track );
if ( filter != NULL )
{
properties = MLT_FILTER_PROPERTIES( filter );
mlt_properties_inherit( properties, group );
}
}
else if ( !strcmp( argv[ i ], "-transition" ) )
{
mlt_transition transition = create_transition( profile, field, argv[ ++ i ], track - 1 );
if ( transition != NULL )
{
properties = MLT_TRANSITION_PROPERTIES( transition );
mlt_properties_inherit( properties, group );
}
}
else if ( !strcmp( argv[ i ], "-blank" ) )
{
if ( producer != NULL && !mlt_producer_is_cut( producer ) )
mlt_playlist_append( playlist, producer );
producer = NULL;
if ( strchr( argv[ i + 1 ], ':' ) )
mlt_playlist_blank_time( playlist, argv[ ++ i ] );
else
// support for legacy where plain int is an out point instead of length
mlt_playlist_blank( playlist, atof( argv[ ++ i ] ) );
}
else if ( !strcmp( argv[ i ], "-track" ) ||
!strcmp( argv[ i ], "-null-track" ) ||
!strcmp( argv[ i ], "-video-track" ) ||
!strcmp( argv[ i ], "-audio-track" ) ||
!strcmp( argv[ i ], "-hide-track" ) ||
!strcmp( argv[ i ], "-hide-video" ) ||
!strcmp( argv[ i ], "-hide-audio" ) )
{
if ( producer != NULL && !mlt_producer_is_cut( producer ) )
mlt_playlist_append( playlist, producer );
producer = NULL;
if ( !mlt_properties_get_int( MLT_PLAYLIST_PROPERTIES( playlist ), "_melt_first" ) ||
mlt_producer_get_playtime( MLT_PLAYLIST_PRODUCER( playlist ) ) > 0 )
{
mlt_multitrack_connect( multitrack, MLT_PLAYLIST_PRODUCER( playlist ), track ++ );
track_service( field, playlist, ( mlt_destructor )mlt_playlist_close );
playlist = mlt_playlist_new( profile );
}
if ( playlist != NULL )
{
properties = MLT_PLAYLIST_PROPERTIES( playlist );
if ( !strcmp( argv[ i ], "-null-track" ) || !strcmp( argv[ i ], "-hide-track" ) )
mlt_properties_set_int( properties, "hide", 3 );
else if ( !strcmp( argv[ i ], "-audio-track" ) || !strcmp( argv[ i ], "-hide-video" ) )
mlt_properties_set_int( properties, "hide", 1 );
else if ( !strcmp( argv[ i ], "-video-track" ) || !strcmp( argv[ i ], "-hide-audio" ) )
mlt_properties_set_int( properties, "hide", 2 );
}
}
else if ( strchr( argv[ i ], '=' ) && strstr( argv[ i ], "<?xml" ) != argv[ i ] &&
// Prevent interpreting URL with parameters as a property.
// This does not support property names containing a colon.
( !strchr( argv[ i ], ':' ) || strchr( argv[ i ], ':' ) > strchr( argv[ i ], '=' ) ) )
{
mlt_properties_parse( properties, argv[ i ] );
}
else if ( argv[ i ][ 0 ] != '-' )
{
if ( producer != NULL && !mlt_producer_is_cut( producer ) )
mlt_playlist_append( playlist, producer );
if ( title == NULL && strstr( argv[ i ], "<?xml" ) != argv[ i ] )
title = argv[ i ];
producer = create_producer( profile, field, argv[ i ] );
if ( producer != NULL )
{
properties = MLT_PRODUCER_PROPERTIES( producer );
mlt_properties_inherit( properties, group );
}
else
{
fprintf( stderr, "Failed to load \"%s\"\n", argv[ i ] );
}
}
else
{
int backtrack = 0;
if ( !strcmp( argv[ i ], "-serialise" ) ||
!strcmp( argv[ i ], "-consumer" ) ||
!strcmp( argv[ i ], "-profile" ) )
{
i += 2;
backtrack = 1;
}
while ( argv[ i ] != NULL && strchr( argv[ i ], '=' ) &&
( !strchr( argv[ i ], ':' ) || strchr( argv[ i ], ':' ) > strchr( argv[ i ], '=' ) ) )
{
i ++;
backtrack = 1;
}
if ( backtrack )
i --;
}
}
// Connect last producer to playlist
if ( producer != NULL && !mlt_producer_is_cut( producer ) )
mlt_playlist_append( playlist, producer );
// Track the last playlist too
track_service( field, playlist, ( mlt_destructor )mlt_playlist_close );
// We must have a playlist to connect
if ( playlist && ( !mlt_properties_get_int( MLT_PLAYLIST_PROPERTIES( playlist ), "_melt_first" ) ||
mlt_producer_get_playtime( MLT_PLAYLIST_PRODUCER( playlist ) ) > 0 ) )
mlt_multitrack_connect( multitrack, MLT_PLAYLIST_PRODUCER( playlist ), track );
mlt_producer prod = MLT_TRACTOR_PRODUCER( tractor );
mlt_producer_optimise( prod );
mlt_properties props = MLT_TRACTOR_PROPERTIES( tractor );
mlt_properties_set_data( props, "group", group, 0, ( mlt_destructor )mlt_properties_close, NULL );
mlt_properties_set_position( props, "length", mlt_producer_get_out( MLT_MULTITRACK_PRODUCER( multitrack ) ) + 1 );
mlt_producer_set_in_and_out( prod, 0, mlt_producer_get_out( MLT_MULTITRACK_PRODUCER( multitrack ) ) );
if ( title != NULL )
mlt_properties_set( props, "title", strchr( title, '/' ) ? strrchr( title, '/' ) + 1 : title );
// If the last producer has a consumer property connect it tractor
if ( producer )
{
mlt_consumer consumer = mlt_properties_get_data( MLT_PRODUCER_PROPERTIES(producer), "consumer", NULL );
if ( consumer )
mlt_consumer_connect( consumer, MLT_PRODUCER_SERVICE(prod) );
}
return prod;
}