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 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 "producer_ppm.h"
23 #include <framework/mlt_frame.h>
28 typedef struct producer_ppm_s
*producer_ppm
;
32 struct mlt_producer_s parent
;
39 static int producer_get_frame( mlt_producer producer
, mlt_frame_ptr frame
, int index
);
40 static void producer_close( mlt_producer parent
);
42 mlt_producer
producer_ppm_init( void *command
)
44 producer_ppm
this = calloc( sizeof( struct producer_ppm_s
), 1 );
45 if ( this != NULL
&& mlt_producer_init( &this->parent
, this ) == 0 )
47 mlt_producer producer
= &this->parent
;
48 mlt_properties properties
= mlt_producer_properties( producer
);
50 producer
->get_frame
= producer_get_frame
;
51 producer
->close
= producer_close
;
53 if ( command
!= NULL
)
55 mlt_properties_set( properties
, "resource", command
);
56 this->command
= strdup( command
);
60 mlt_properties_set( properties
, "resource", "ppm test" );
69 static int producer_get_image( mlt_frame
this, uint8_t **buffer
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
71 // Get the frames properties
72 mlt_properties properties
= mlt_frame_properties( this );
74 if ( mlt_properties_get_int( properties
, "has_image" ) )
77 uint8_t *rgb
= mlt_properties_get_data( properties
, "image", NULL
);
79 // Get width and height
80 *width
= mlt_properties_get_int( properties
, "width" );
81 *height
= mlt_properties_get_int( properties
, "height" );
83 // Convert to requested format
84 if ( *format
== mlt_image_yuv422
)
87 uint8_t *image
= malloc( *width
* ( *height
+ 1 ) * 2 );
88 mlt_convert_rgb24_to_yuv422( rgb
, *width
, *height
, *width
* 3, image
);
89 mlt_properties_set_data( properties
, "image", image
, *width
* ( *height
+ 1 ) * 2, free
, NULL
);
92 else if ( *format
== mlt_image_rgb24
)
99 mlt_frame_get_image( this, buffer
, format
, width
, height
, writable
);
105 FILE *producer_ppm_run_video( producer_ppm
this )
107 if ( this->video
== NULL
)
109 if ( this->command
== NULL
)
111 this->video
= popen( "image2raw -k -r 25 -ppm /usr/share/pixmaps/*.png", "r" );
115 char command
[ 1024 ];
116 float fps
= mlt_producer_get_fps( &this->parent
);
117 float position
= mlt_producer_position( &this->parent
);
118 sprintf( command
, "ffmpeg -i \"%s\" -ss %f -f imagepipe -r %f -img ppm - 2>/dev/null", this->command
, position
, fps
);
119 this->video
= popen( command
, "r" );
125 FILE *producer_ppm_run_audio( producer_ppm
this )
127 if ( this->audio
== NULL
)
129 if ( this->command
!= NULL
)
131 char command
[ 1024 ];
132 float position
= mlt_producer_position( &this->parent
);
133 sprintf( command
, "ffmpeg -i \"%s\" -ss %f -f s16le -ar 48000 -ac 2 - 2>/dev/null", this->command
, position
);
134 this->audio
= popen( command
, "r" );
140 static void producer_ppm_position( producer_ppm
this, uint64_t requested
)
142 if ( requested
!= this->expected
)
144 if ( this->video
!= NULL
)
145 pclose( this->video
);
147 if ( this->audio
!= NULL
)
148 pclose( this->audio
);
152 // This is the next frame we expect
153 this->expected
= mlt_producer_frame( &this->parent
) + 1;
156 this->video
= producer_ppm_run_video( this );
158 // Open the audio pipe
159 this->audio
= producer_ppm_run_audio( this );
163 static int producer_get_audio( mlt_frame
this, int16_t **buffer
, mlt_audio_format
*format
, int *frequency
, int *channels
, int *samples
)
165 // Get the frames properties
166 mlt_properties properties
= mlt_frame_properties( this );
168 FILE *pipe
= mlt_properties_get_data( properties
, "audio.pipe", NULL
);
175 int size
= *samples
* *channels
* 2;
178 *buffer
= malloc( size
);
182 fread( *buffer
, size
, 1, pipe
);
184 memset( *buffer
, 0, size
);
186 // Pass the data on the frame properties
187 mlt_properties_set_data( properties
, "audio", *buffer
, size
, free
, NULL
);
192 static int read_ppm_header( FILE *video
, int *width
, int *height
)
197 fgets( temp
, 132, video
);
198 fgets( temp
, 132, video
);
199 count
+= sscanf( temp
, "%d %d", width
, height
);
200 fgets( temp
, 132, video
);
205 static int producer_get_frame( mlt_producer producer
, mlt_frame_ptr frame
, int index
)
207 producer_ppm
this = producer
->child
;
211 // Construct a test frame
212 *frame
= mlt_frame_init( );
214 // Are we at the position expected?
215 producer_ppm_position( this, mlt_producer_frame( producer
) );
217 // Get the frames properties
218 mlt_properties properties
= mlt_frame_properties( *frame
);
220 FILE *video
= this->video
;
221 FILE *audio
= this->audio
;
224 if ( video
!= NULL
&& read_ppm_header( video
, &width
, &height
) == 2 )
229 uint8_t *image
= malloc( width
* ( height
+ 1 ) * 3 );
232 fread( image
, width
* height
* 3, 1, video
);
234 // Pass the data on the frame properties
235 mlt_properties_set_data( properties
, "image", image
, width
* ( height
+ 1 ) * 3, free
, NULL
);
236 mlt_properties_set_int( properties
, "width", width
);
237 mlt_properties_set_int( properties
, "height", height
);
238 mlt_properties_set_int( properties
, "has_image", 1 );
239 mlt_properties_set_int( properties
, "progressive", 1 );
240 mlt_properties_set_double( properties
, "aspect_ratio", ( double )width
/ height
);
242 // Push the image callback
243 mlt_frame_push_get_image( *frame
, producer_get_image
);
247 // Push the image callback
248 mlt_frame_push_get_image( *frame
, producer_get_image
);
251 // Set the audio pipe
252 mlt_properties_set_data( properties
, "audio.pipe", audio
, 0, NULL
, NULL
);
254 // Hmm - register audio callback
255 ( *frame
)->get_audio
= producer_get_audio
;
257 // Update timecode on the frame we're creating
258 mlt_frame_set_position( *frame
, mlt_producer_position( producer
) );
260 // Calculate the next timecode
261 mlt_producer_prepare_next( producer
);
266 static void producer_close( mlt_producer parent
)
268 producer_ppm
this = parent
->child
;
270 pclose( this->video
);
272 pclose( this->audio
);
273 free( this->command
);
274 parent
->close
= NULL
;
275 mlt_producer_close( parent
);