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 typedef struct producer_ppm_s *producer_ppm;
30 struct mlt_producer_s parent;
37 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index );
38 static void producer_close( mlt_producer parent );
40 mlt_producer producer_ppm_init( void *command )
42 producer_ppm this = calloc( sizeof( struct producer_ppm_s ), 1 );
43 if ( this != NULL && mlt_producer_init( &this->parent, this ) == 0 )
45 mlt_producer producer = &this->parent;
46 mlt_properties properties = mlt_producer_properties( producer );
48 producer->get_frame = producer_get_frame;
49 producer->close = producer_close;
51 if ( command != NULL )
53 mlt_properties_set( properties, "resource", command );
54 this->command = strdup( command );
58 mlt_properties_set( properties, "resource", "ppm test" );
67 static int producer_get_image( mlt_frame this, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
69 // Get the frames properties
70 mlt_properties properties = mlt_frame_properties( this );
72 if ( mlt_properties_get_int( properties, "has_image" ) )
75 uint8_t *rgb = mlt_properties_get_data( properties, "image", NULL );
77 // Get width and height
78 *width = mlt_properties_get_int( properties, "width" );
79 *height = mlt_properties_get_int( properties, "height" );
81 // Convert to requested format
82 if ( *format == mlt_image_yuv422 )
84 uint8_t *image = malloc( *width * *height * 2 );
85 mlt_convert_rgb24_to_yuv422( rgb, *width, *height, *width * 3, image );
86 mlt_properties_set_data( properties, "image", image, *width * *height * 2, free, NULL );
89 else if ( *format == mlt_image_rgb24 )
96 mlt_frame_get_image( this, buffer, format, width, height, writable );
102 FILE *producer_ppm_run_video( producer_ppm this )
104 if ( this->video == NULL )
106 if ( this->command == NULL )
108 this->video = popen( "image2raw -k -r 25 -ppm /usr/share/pixmaps/*.png", "r" );
112 char command[ 1024 ];
113 float fps = mlt_producer_get_fps( &this->parent );
114 float position = mlt_producer_position( &this->parent );
115 sprintf( command, "ffmpeg -i \"%s\" -ss %f -f imagepipe -r %f -img ppm - 2>/dev/null", this->command, position, fps );
116 this->video = popen( command, "r" );
122 FILE *producer_ppm_run_audio( producer_ppm this )
124 if ( this->audio == NULL )
126 if ( this->command != NULL )
128 char command[ 1024 ];
129 float position = mlt_producer_position( &this->parent );
130 sprintf( command, "ffmpeg -i \"%s\" -ss %f -f s16le -ar 48000 -ac 2 - 2>/dev/null", this->command, position );
131 this->audio = popen( command, "r" );
137 static void producer_ppm_position( producer_ppm this, uint64_t requested )
139 if ( requested != this->expected )
141 if ( this->video != NULL )
142 pclose( this->video );
144 if ( this->audio != NULL )
145 pclose( this->audio );
149 // This is the next frame we expect
150 this->expected = mlt_producer_frame( &this->parent ) + 1;
153 this->video = producer_ppm_run_video( this );
155 // Open the audio pipe
156 this->audio = producer_ppm_run_audio( this );
160 static int producer_get_audio( mlt_frame this, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples )
162 // Get the frames properties
163 mlt_properties properties = mlt_frame_properties( this );
165 FILE *pipe = mlt_properties_get_data( properties, "audio.pipe", NULL );
172 int size = *samples * *channels * 2;
175 *buffer = malloc( size );
179 fread( *buffer, size, 1, pipe );
181 memset( *buffer, 0, size );
183 // Pass the data on the frame properties
184 mlt_properties_set_data( properties, "audio", *buffer, size, free, NULL );
189 static int read_ppm_header( FILE *video, int *width, int *height )
194 fgets( temp, 132, video );
195 fgets( temp, 132, video );
196 count += sscanf( temp, "%d %d", width, height );
197 fgets( temp, 132, video );
202 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
204 producer_ppm this = producer->child;
208 // Construct a test frame
209 *frame = mlt_frame_init( );
211 // Are we at the position expected?
212 producer_ppm_position( this, mlt_producer_frame( producer ) );
214 // Get the frames properties
215 mlt_properties properties = mlt_frame_properties( *frame );
217 FILE *video = this->video;
218 FILE *audio = this->audio;
221 if ( video != NULL && read_ppm_header( video, &width, &height ) == 2 )
225 uint8_t *image = malloc( width * height * 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 * 3, free, 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 );
236 // Push the image callback
237 mlt_frame_push_get_image( *frame, producer_get_image );
241 // Push the image callback
242 mlt_frame_push_get_image( *frame, producer_get_image );
245 // Set the audio pipe
246 mlt_properties_set_data( properties, "audio.pipe", audio, 0, NULL, NULL );
248 // Hmm - register audio callback
249 ( *frame )->get_audio = producer_get_audio;
251 // Update timecode on the frame we're creating
252 mlt_frame_set_timecode( *frame, mlt_producer_position( producer ) );
254 // Calculate the next timecode
255 mlt_producer_prepare_next( producer );
260 static void producer_close( mlt_producer parent )
262 producer_ppm this = parent->child;
264 pclose( this->video );
266 pclose( this->audio );
267 free( this->command );
268 parent->close = NULL;
269 mlt_producer_close( parent );