2 * producer_ppm.c -- simple ppm test case
3 * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
4 * Author: Charles Yates <charles.yates@pandora.be>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library 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 GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #include <framework/mlt_producer.h>
22 #include <framework/mlt_frame.h>
27 typedef struct producer_ppm_s
*producer_ppm
;
31 struct mlt_producer_s parent
;
38 static int producer_get_frame( mlt_producer producer
, mlt_frame_ptr frame
, int index
);
39 static void producer_close( mlt_producer parent
);
41 mlt_producer
producer_ppm_init( mlt_profile profile
, mlt_service_type type
, const char *id
, char *command
)
43 producer_ppm
this = calloc( sizeof( struct producer_ppm_s
), 1 );
44 if ( this != NULL
&& mlt_producer_init( &this->parent
, this ) == 0 )
46 mlt_producer producer
= &this->parent
;
47 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( producer
);
49 producer
->get_frame
= producer_get_frame
;
50 producer
->close
= ( mlt_destructor
)producer_close
;
52 if ( command
!= NULL
)
54 mlt_properties_set( properties
, "resource", command
);
55 this->command
= strdup( command
);
59 mlt_properties_set( properties
, "resource", "ppm test" );
68 static int producer_get_image( mlt_frame
this, uint8_t **buffer
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
70 // Get the frames properties
71 mlt_properties properties
= MLT_FRAME_PROPERTIES( this );
73 if ( mlt_properties_get_int( properties
, "has_image" ) )
76 uint8_t *rgb
= mlt_properties_get_data( properties
, "image", NULL
);
78 // Get width and height
79 *width
= mlt_properties_get_int( properties
, "width" );
80 *height
= mlt_properties_get_int( properties
, "height" );
82 // Convert to requested format
83 if ( *format
== mlt_image_yuv422
)
85 uint8_t *image
= mlt_pool_alloc( *width
* ( *height
+ 1 ) * 2 );
86 mlt_convert_rgb24_to_yuv422( rgb
, *width
, *height
, *width
* 3, image
);
87 mlt_properties_set_data( properties
, "image", image
, *width
* ( *height
+ 1 ) * 2, ( mlt_destructor
)mlt_pool_release
, NULL
);
90 else if ( *format
== mlt_image_rgb24
)
97 mlt_frame_get_image( this, buffer
, format
, width
, height
, writable
);
103 FILE *producer_ppm_run_video( producer_ppm
this )
105 if ( this->video
== NULL
)
107 if ( this->command
== NULL
)
109 this->video
= popen( "image2raw -k -r 25 -ppm /usr/share/pixmaps/*.png", "r" );
113 char command
[ 1024 ];
114 float fps
= mlt_producer_get_fps( &this->parent
);
115 float position
= mlt_producer_position( &this->parent
);
116 sprintf( command
, "ffmpeg -i \"%s\" -ss %f -f imagepipe -r %f -img ppm - 2>/dev/null", this->command
, position
, fps
);
117 this->video
= popen( command
, "r" );
123 FILE *producer_ppm_run_audio( producer_ppm
this )
125 if ( this->audio
== NULL
)
127 if ( this->command
!= NULL
)
129 char command
[ 1024 ];
130 float position
= mlt_producer_position( &this->parent
);
131 sprintf( command
, "ffmpeg -i \"%s\" -ss %f -f s16le -ar 48000 -ac 2 - 2>/dev/null", this->command
, position
);
132 this->audio
= popen( command
, "r" );
138 static void producer_ppm_position( producer_ppm
this, uint64_t requested
)
140 if ( requested
!= this->expected
)
142 if ( this->video
!= NULL
)
143 pclose( this->video
);
145 if ( this->audio
!= NULL
)
146 pclose( this->audio
);
150 // This is the next frame we expect
151 this->expected
= mlt_producer_frame( &this->parent
) + 1;
154 this->video
= producer_ppm_run_video( this );
156 // Open the audio pipe
157 this->audio
= producer_ppm_run_audio( this );
161 static int producer_get_audio( mlt_frame
this, int16_t **buffer
, mlt_audio_format
*format
, int *frequency
, int *channels
, int *samples
)
163 // Get the frames properties
164 mlt_properties properties
= MLT_FRAME_PROPERTIES( this );
166 FILE *pipe
= mlt_properties_get_data( properties
, "audio.pipe", NULL
);
173 int size
= *samples
* *channels
* 2;
176 *buffer
= malloc( size
);
180 fread( *buffer
, size
, 1, pipe
);
182 memset( *buffer
, 0, size
);
184 // Pass the data on the frame properties
185 mlt_properties_set_data( properties
, "audio", *buffer
, size
, free
, NULL
);
190 static int read_ppm_header( FILE *video
, int *width
, int *height
)
195 fgets( temp
, 132, video
);
196 fgets( temp
, 132, video
);
197 count
+= sscanf( temp
, "%d %d", width
, height
);
198 fgets( temp
, 132, video
);
203 static int producer_get_frame( mlt_producer producer
, mlt_frame_ptr frame
, int index
)
205 producer_ppm
this = producer
->child
;
209 // Construct a test frame
210 *frame
= mlt_frame_init( MLT_PRODUCER_SERVICE( producer
) );
212 // Are we at the position expected?
213 producer_ppm_position( this, mlt_producer_frame( producer
) );
215 // Get the frames properties
216 mlt_properties properties
= MLT_FRAME_PROPERTIES( *frame
);
218 FILE *video
= this->video
;
219 FILE *audio
= this->audio
;
222 if ( video
!= NULL
&& read_ppm_header( video
, &width
, &height
) == 2 )
225 uint8_t *image
= mlt_pool_alloc( width
* ( height
+ 1 ) * 3 );
228 fread( image
, width
* height
* 3, 1, video
);
230 // Pass the data on the frame properties
231 mlt_properties_set_data( properties
, "image", image
, width
* ( height
+ 1 ) * 3, ( mlt_destructor
)mlt_pool_release
, NULL
);
232 mlt_properties_set_int( properties
, "width", width
);
233 mlt_properties_set_int( properties
, "height", height
);
234 mlt_properties_set_int( properties
, "has_image", 1 );
235 mlt_properties_set_int( properties
, "progressive", 1 );
236 mlt_properties_set_double( properties
, "aspect_ratio", 1 );
238 // Push the image callback
239 mlt_frame_push_get_image( *frame
, producer_get_image
);
243 // Push the image callback
244 mlt_frame_push_get_image( *frame
, producer_get_image
);
247 // Set the audio pipe
248 mlt_properties_set_data( properties
, "audio.pipe", audio
, 0, NULL
, NULL
);
250 // Hmm - register audio callback
251 mlt_frame_push_audio( *frame
, producer_get_audio
);
253 // Update timecode on the frame we're creating
254 mlt_frame_set_position( *frame
, mlt_producer_position( producer
) );
256 // Calculate the next timecode
257 mlt_producer_prepare_next( producer
);
262 static void producer_close( mlt_producer parent
)
264 producer_ppm
this = parent
->child
;
266 pclose( this->video
);
268 pclose( this->audio
);
269 free( this->command
);
270 parent
->close
= NULL
;
271 mlt_producer_close( parent
);