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"
22 #include <framework/mlt_frame.h>
26 static int producer_get_frame( mlt_producer producer
, mlt_frame_ptr frame
, int index
);
27 static void producer_close( mlt_producer parent
);
29 mlt_producer
producer_ppm_init( void *command
)
31 producer_ppm
this = calloc( sizeof( struct producer_ppm_s
), 1 );
32 if ( this != NULL
&& mlt_producer_init( &this->parent
, this ) == 0 )
34 mlt_producer producer
= &this->parent
;
36 producer
->get_frame
= producer_get_frame
;
37 producer
->close
= producer_close
;
39 if ( command
!= NULL
)
40 this->command
= strdup( command
);
48 static int producer_get_image( mlt_frame
this, uint8_t **buffer
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
50 // Get the frames properties
51 mlt_properties properties
= mlt_frame_properties( this );
54 uint8_t *rgb
= mlt_properties_get_data( properties
, "image", NULL
);
56 // Get width and height
57 *width
= mlt_properties_get_int( properties
, "width" );
58 *height
= mlt_properties_get_int( properties
, "height" );
60 // Convert to requested format
61 if ( *format
== mlt_image_yuv422
)
63 uint8_t *image
= malloc( *width
* *height
* 2 );
64 mlt_convert_rgb24_to_yuv422( rgb
, *width
, *height
, *width
* 3, image
);
65 mlt_properties_set_data( properties
, "image", image
, *width
* *height
* 2, free
, NULL
);
68 else if ( *format
== mlt_image_rgb24
)
76 static void producer_ppm_position( producer_ppm
this, uint64_t requested
)
78 if ( requested
!= this->expected
)
80 if ( this->video
!= NULL
)
81 pclose( this->video
);
83 if ( this->audio
!= NULL
)
84 pclose( this->audio
);
88 // This is the next frame we expect
89 this->expected
= mlt_producer_frame( &this->parent
) + 1;
92 FILE *producer_ppm_run_video( producer_ppm
this )
94 if ( this->video
== NULL
)
96 if ( this->command
== NULL
)
98 this->video
= popen( "image2raw -n -a -r 3 -ppm /usr/share/pixmaps/*.png", "r" );
102 char command
[ 1024 ];
103 float fps
= mlt_producer_get_fps( &this->parent
);
104 float position
= mlt_producer_position( &this->parent
);
105 sprintf( command
, "ffmpeg -i \"%s\" -ss %f -f imagepipe -r %f -img ppm -", this->command
, position
, fps
);
106 this->video
= popen( command
, "r" );
112 FILE *producer_ppm_run_audio( producer_ppm
this )
114 if ( this->audio
== NULL
)
116 if ( this->command
!= NULL
)
118 char command
[ 1024 ];
119 float position
= mlt_producer_position( &this->parent
);
120 sprintf( command
, "ffmpeg -i \"%s\" -ss %f -f s16le -ar 48000 -ac 2 -", this->command
, position
);
121 this->audio
= popen( command
, "r" );
128 static int producer_get_audio( mlt_frame
this, int16_t **buffer
, mlt_audio_format
*format
, int *frequency
, int *channels
, int *samples
)
130 // Get the frames properties
131 mlt_properties properties
= mlt_frame_properties( this );
133 FILE *pipe
= mlt_properties_get_data( properties
, "audio.pipe", NULL
);
140 int size
= *samples
* *channels
* 2;
143 *buffer
= malloc( size
);
146 fread( *buffer
, size
, 1, pipe
);
148 // Pass the data on the frame properties
149 mlt_properties_set_data( properties
, "audio", *buffer
, size
, free
, NULL
);
154 static int producer_get_frame( mlt_producer producer
, mlt_frame_ptr frame
, int index
)
156 producer_ppm
this = producer
->child
;
160 // Construct a test frame
161 *frame
= mlt_frame_init( );
163 // Are we at the position expected?
164 producer_ppm_position( this, mlt_producer_frame( producer
) );
167 FILE *video
= producer_ppm_run_video( this );
169 // Open the audio pipe
170 FILE *audio
= producer_ppm_run_audio( this );
172 // Get the frames properties
173 mlt_properties properties
= mlt_frame_properties( *frame
);
176 if ( video
!= NULL
&& fscanf( video
, "P6\n%d %d\n255\n", &width
, &height
) == 2 )
179 uint8_t *image
= malloc( width
* height
* 3 );
182 fread( image
, width
* height
* 3, 1, video
);
184 // Pass the data on the frame properties
185 mlt_properties_set_data( properties
, "image", image
, width
* height
* 3, free
, NULL
);
186 mlt_properties_set_int( properties
, "width", width
);
187 mlt_properties_set_int( properties
, "height", height
);
189 // Push the image callback
190 mlt_frame_push_get_image( *frame
, producer_get_image
);
196 // Set the audio pipe
197 mlt_properties_set_data( properties
, "audio.pipe", audio
, 0, NULL
, NULL
);
199 // Hmm - register audio callback
200 ( *frame
)->get_audio
= producer_get_audio
;
203 // Update timecode on the frame we're creating
204 mlt_frame_set_timecode( *frame
, mlt_producer_position( producer
) );
206 // Calculate the next timecode
207 mlt_producer_prepare_next( producer
);
212 static void producer_close( mlt_producer parent
)
214 producer_ppm
this = parent
->child
;
216 pclose( this->video
);
218 pclose( this->audio
);
219 free( this->command
);
220 parent
->close
= NULL
;
221 mlt_producer_close( parent
);