#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <ctype.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
typedef struct producer_ffmpeg_s *producer_ffmpeg;
+/** Bi-directional pipe structure.
+*/
+
+typedef struct rwpipe
+{
+ int pid;
+ FILE *reader;
+ FILE *writer;
+}
+rwpipe;
+
+/** Create a bidirectional pipe for the given command.
+*/
+
+rwpipe *rwpipe_open( char *command )
+{
+ rwpipe *this = malloc( sizeof( rwpipe ) );
+
+ if ( this != NULL )
+ {
+ int input[ 2 ];
+ int output[ 2 ];
+
+ pipe( input );
+ pipe( output );
+
+ this->pid = fork();
+
+ if ( this->pid == 0 )
+ {
+ signal( SIGPIPE, SIG_DFL );
+ signal( SIGHUP, SIG_DFL );
+ signal( SIGINT, SIG_DFL );
+ signal( SIGTERM, SIG_DFL );
+ signal( SIGSTOP, SIG_DFL );
+ signal( SIGCHLD, SIG_DFL );
+
+ dup2( output[ 0 ], STDIN_FILENO );
+ dup2( input[ 1 ], STDOUT_FILENO );
+
+ close( input[ 0 ] );
+ close( input[ 1 ] );
+ close( output[ 0 ] );
+ close( output[ 1 ] );
+
+ execl( "/bin/sh", "sh", "-c", command, NULL );
+ exit( 255 );
+ }
+ else
+ {
+ setpgid( this->pid, this->pid );
+
+ close( input[ 1 ] );
+ close( output[ 0 ] );
+
+ this->reader = fdopen( input[ 0 ], "r" );
+ this->writer = fdopen( output[ 1 ], "w" );
+ }
+ }
+
+ return this;
+}
+
+/** Read data from the pipe.
+*/
+
+FILE *rwpipe_reader( rwpipe *this )
+{
+ if ( this != NULL )
+ return this->reader;
+ else
+ return NULL;
+}
+
+/** Write data to the pipe.
+*/
+
+FILE *rwpipe_writer( rwpipe *this )
+{
+ if ( this != NULL )
+ return this->writer;
+ else
+ return NULL;
+}
+
+/** Close the pipe and process.
+*/
+
+void rwpipe_close( rwpipe *this )
+{
+ if ( this != NULL )
+ {
+ fclose( this->reader );
+ fclose( this->writer );
+ kill( - this->pid, SIGKILL );
+ waitpid( - this->pid, NULL, 0 );
+ free( this );
+ }
+}
+
struct producer_ffmpeg_s
{
struct mlt_producer_s parent;
+ rwpipe *video_pipe;
+ rwpipe *audio_pipe;
FILE *video;
FILE *audio;
uint64_t expected;
mlt_producer producer_ffmpeg_init( char *file )
{
producer_ffmpeg this = calloc( sizeof( struct producer_ffmpeg_s ), 1 );
- if ( this != NULL && mlt_producer_init( &this->parent, this ) == 0 )
+ if ( file != NULL && this != NULL && mlt_producer_init( &this->parent, this ) == 0 )
{
// Get the producer
mlt_producer producer = &this->parent;
// Set the properties
mlt_properties_set( properties, "mlt_type", "producer_ffmpeg" );
- if ( file != NULL && !strcmp( file, "v4l" ) )
+ if ( !strcmp( file, "v4l" ) )
{
mlt_properties_set( properties, "video_type", "v4l" );
mlt_properties_set( properties, "video_file", "/dev/video0" );
mlt_properties_set_int( properties, "audio_channels", 2 );
mlt_properties_set_int( properties, "audio_track", 0 );
+ mlt_properties_set( properties, "log_id", file );
+ mlt_properties_set( properties, "resource", file );
+
this->buffer = malloc( 1024 * 1024 * 2 );
return producer;
return 0;
}
-FILE *producer_ffmpeg_run_video( producer_ffmpeg this )
+FILE *producer_ffmpeg_run_video( producer_ffmpeg this, mlt_timecode position )
{
if ( this->video == NULL )
{
float video_rate = mlt_properties_get_double( properties, "fps" );
char *video_size = mlt_properties_get( properties, "video_size" );
char command[ 1024 ] = "";
- float position = mlt_producer_position( &this->parent );
-
- if ( video_loop ) position = 0;
sprintf( command, "%s/ffmpeg/video.sh \"%s\" \"%s\" \"%s\" %f %f 2>/dev/null",
mlt_prefix,
video_file,
video_size,
video_rate,
- position );
+ ( float )position );
- this->video = popen( command, "r" );
+ this->video_pipe = rwpipe_open( command );
+ this->video = rwpipe_reader( this->video_pipe );
}
}
return this->video;
}
-FILE *producer_ffmpeg_run_audio( producer_ffmpeg this )
+FILE *producer_ffmpeg_run_audio( producer_ffmpeg this, mlt_timecode position )
{
// Get the producer
mlt_producer producer = &this->parent;
int channels = mlt_properties_get_int( properties, "audio_channels" );
int track = mlt_properties_get_int( properties, "audio_track" );
char command[ 1024 ] = "";
- float position = mlt_producer_position( &this->parent );
-
- if ( audio_loop ) position = 0;
sprintf( command, "%s/ffmpeg/audio.sh \"%s\" \"%s\" %f %d %d %d 2>/dev/null",
mlt_prefix,
audio_type,
audio_file,
- position,
+ ( float )position,
frequency,
channels,
track );
- this->audio = popen( command, "r" );
+ this->audio_pipe = rwpipe_open( command );
+ this->audio = rwpipe_reader( this->audio_pipe );
}
}
return this->audio;
{
// Close the video pipe
if ( this->video != NULL )
- pclose( this->video );
+ rwpipe_close( this->video_pipe );
this->video = NULL;
// Close the audio pipe
if ( this->audio != NULL )
- pclose( this->audio );
+ rwpipe_close( this->audio_pipe );
this->audio = NULL;
// We should not be open now
}
// This is the next frame we expect
- this->expected = mlt_producer_frame( &this->parent ) + 1;
+ this->expected = requested + 1;
// Open the pipe
- this->video = producer_ffmpeg_run_video( this );
+ this->video = producer_ffmpeg_run_video( this, 0 );
// Open the audio pipe
- this->audio = producer_ffmpeg_run_audio( this );
+ this->audio = producer_ffmpeg_run_audio( this, 0 );
// We should be open now
this->open = 1;
}
-static int sample_calculator( float fps, int frequency, int64_t position )
-{
- int samples = 0;
-
- if ( fps == 25 )
- {
- samples = frequency / 25;
- }
- else if ( fps >= 29.97 && fps < 29.98 )
- {
- samples = frequency / 30;
-
- switch ( frequency )
- {
- case 48000:
- if ( position % 5 != 0 )
- samples += 2;
- break;
- case 44100:
- if ( position % 300 == 0 )
- samples = 1471;
- else if ( position % 30 == 0 )
- samples = 1470;
- else if ( position % 2 == 0 )
- samples = 1472;
- else
- samples = 1471;
- break;
- case 32000:
- if ( position % 30 == 0 )
- samples = 1068;
- else if ( position % 29 == 0 )
- samples = 1067;
- else if ( position % 4 == 2 )
- samples = 1067;
- else
- samples = 1068;
- break;
- default:
- samples = 0;
- }
- }
- else
- {
- if ( fps != 0 )
- samples = frequency / fps;
- }
-
- return samples;
-}
-
static int producer_get_audio( mlt_frame this, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples )
{
// Get the frames properties
{
do
{
- *samples = sample_calculator( fps, *frequency, target - skip );
+ *samples = mlt_sample_calculator( fps, *frequency, target - skip );
if ( fread( *buffer, *samples * *channels * 2, 1, producer->audio ) != 1 )
{
- pclose( producer->audio );
+ rwpipe_close( producer->audio_pipe );
producer->audio = NULL;
producer->end_of_audio = 1;
}
}
else
{
- *samples = sample_calculator( fps, *frequency, target );
+ *samples = mlt_sample_calculator( fps, *frequency, target );
memset( *buffer, 0, size );
}
// Inform caller that end of clip is reached
this->end_of_video = !video_loop;
- pclose( this->video );
+ rwpipe_close( this->video_pipe );
this->video = NULL;
}
// Set the audio pipe
mlt_properties_set_data( properties, "producer_ffmpeg", this, 0, NULL, NULL );
- mlt_properties_set_int( properties, "end_of_clip", this->end_of_video && this->end_of_audio );
// Hmm - register audio callback
( *frame )->get_audio = producer_get_audio;
// Get the additional properties
double aspect_ratio = mlt_properties_get_double( producer_properties, "aspect_ratio" );
double speed = mlt_properties_get_double( producer_properties, "speed" );
+ char *video_file = mlt_properties_get( producer_properties, "video_file" );
// Set them on the frame
mlt_properties_set_double( properties, "aspect_ratio", aspect_ratio );
mlt_properties_set_double( properties, "speed", speed );
+ if ( strchr( video_file, '/' ) != NULL )
+ mlt_properties_set( properties, "file", strrchr( video_file, '/' ) + 1 );
+ else
+ mlt_properties_set( properties, "file", video_file );
+
// Set the out point on the producer
- if ( !this->end_of_video || !this->end_of_audio )
- mlt_producer_set_in_and_out( &this->parent, mlt_producer_get_in( &this->parent ), mlt_producer_position( &this->parent ) + 1 );
- else
+ if ( this->end_of_video && this->end_of_audio )
+ {
+ mlt_properties_set_int( properties, "end_of_clip", 1 );
+ mlt_properties_set_timecode( producer_properties, "length", mlt_producer_position( &this->parent ) );
mlt_producer_set_in_and_out( &this->parent, mlt_producer_get_in( &this->parent ), mlt_producer_position( &this->parent ) );
+ }
// Update timecode on the frame we're creating
mlt_frame_set_timecode( *frame, mlt_producer_position( producer ) );
{
producer_ffmpeg this = parent->child;
if ( this->video )
- pclose( this->video );
+ rwpipe_close( this->video_pipe );
if ( this->audio )
- pclose( this->audio );
+ rwpipe_close( this->audio_pipe );
parent->close = NULL;
mlt_producer_close( parent );
free( this->buffer );
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