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VLC Source 0.5.3.dmg
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video_output
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video_output.c
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2003-04-07
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/*****************************************************************************
* video_output.c : video output thread
* This module describes the programming interface for video output threads.
* It includes functions allowing to open a new thread, send pictures to a
* thread, and destroy a previously oppened video output thread.
*****************************************************************************
* Copyright (C) 2000-2001 VideoLAN
* $Id: video_output.c,v 1.217 2003/03/28 17:02:25 gbazin Exp $
*
* Authors: Vincent Seguin <seguin@via.ecp.fr>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include <stdlib.h> /* free() */
#include <vlc/vlc.h>
#ifdef HAVE_SYS_TIMES_H
# include <sys/times.h>
#endif
#include "video.h"
#include "video_output.h"
#include <vlc/input.h> /* for input_thread_t and i_pts_delay */
#if defined( SYS_DARWIN )
#include "darwin_specific.h"
#endif
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static int InitThread ( vout_thread_t * );
static void RunThread ( vout_thread_t * );
static void ErrorThread ( vout_thread_t * );
static void EndThread ( vout_thread_t * );
static void DestroyThread ( vout_thread_t * );
static int ReduceHeight ( int );
static int BinaryLog ( uint32_t );
static void MaskToShift ( int *, int *, uint32_t );
static void InitWindowSize ( vout_thread_t *, int *, int * );
/*****************************************************************************
* vout_Request: find a video output thread, create one, or destroy one.
*****************************************************************************
* This function looks for a video output thread matching the current
* properties. If not found, it spawns a new one.
*****************************************************************************/
vout_thread_t * __vout_Request ( vlc_object_t *p_this, vout_thread_t *p_vout,
unsigned int i_width, unsigned int i_height,
vlc_fourcc_t i_chroma, unsigned int i_aspect )
{
if( !i_width || !i_height || !i_chroma )
{
/* Reattach video output to input before bailing out */
if( p_vout )
{
vlc_object_t *p_input;
char *psz_sout = config_GetPsz( p_this, "sout" );
p_input = vlc_object_find( p_this, VLC_OBJECT_INPUT, FIND_PARENT );
if( p_input && (!psz_sout || !*psz_sout) )
{
vlc_object_detach( p_vout );
vlc_object_attach( p_vout, p_input );
}
else
{
vlc_object_detach( p_vout );
vlc_object_release( p_vout );
vout_Destroy( p_vout );
}
if( psz_sout ) free( psz_sout );
if( p_input ) vlc_object_release( p_input );
}
return NULL;
}
/* If a video output was provided, lock it, otherwise look for one. */
if( p_vout )
{
vlc_object_yield( p_vout );
}
else
{
p_vout = vlc_object_find( p_this, VLC_OBJECT_VOUT, FIND_CHILD );
if( !p_vout )
{
vlc_object_t *p_input;
p_input = vlc_object_find( p_this, VLC_OBJECT_INPUT, FIND_PARENT );
if( p_input )
{
p_vout = vlc_object_find( p_input, VLC_OBJECT_VOUT,
FIND_CHILD );
vlc_object_release( p_input );
}
}
}
/* If we now have a video output, check it has the right properties */
if( p_vout )
{
char *psz_filter_chain;
/* We don't directly check for the "filter" variable for obvious
* performance reasons. */
if( p_vout->b_filter_change )
{
psz_filter_chain = config_GetPsz( p_this, "filter" );
if( psz_filter_chain && !*psz_filter_chain )
{
free( psz_filter_chain );
psz_filter_chain = NULL;
}
if( p_vout->psz_filter_chain && !*p_vout->psz_filter_chain )
{
free( p_vout->psz_filter_chain );
p_vout->psz_filter_chain = NULL;
}
if( ( !psz_filter_chain && !p_vout->psz_filter_chain ) ||
( psz_filter_chain && p_vout->psz_filter_chain &&
!strcmp( psz_filter_chain, p_vout->psz_filter_chain ) ) )
{
p_vout->b_filter_change = VLC_FALSE;
}
if( psz_filter_chain ) free( psz_filter_chain );
}
if( ( p_vout->render.i_width != i_width ) ||
( p_vout->render.i_height != i_height ) ||
( p_vout->render.i_chroma != i_chroma ) ||
( p_vout->render.i_aspect != i_aspect
&& !p_vout->b_override_aspect ) ||
p_vout->b_filter_change )
{
/* We are not interested in this format, close this vout */
vlc_object_detach( p_vout );
vlc_object_release( p_vout );
vout_Destroy( p_vout );
p_vout = NULL;
}
else
{
/* This video output is cool! Hijack it. */
vlc_object_detach( p_vout );
vlc_object_attach( p_vout, p_this );
vlc_object_release( p_vout );
}
}
if( !p_vout )
{
msg_Dbg( p_this, "no usable vout present, spawning one" );
p_vout = vout_Create( p_this, i_width, i_height, i_chroma, i_aspect );
}
return p_vout;
}
/*****************************************************************************
* vout_Create: creates a new video output thread
*****************************************************************************
* This function creates a new video output thread, and returns a pointer
* to its description. On error, it returns NULL.
*****************************************************************************/
vout_thread_t * __vout_Create( vlc_object_t *p_parent,
unsigned int i_width, unsigned int i_height,
vlc_fourcc_t i_chroma, unsigned int i_aspect )
{
vout_thread_t * p_vout; /* thread descriptor */
input_thread_t * p_input_thread;
int i_index; /* loop variable */
char * psz_plugin;
vlc_value_t val;
/* Allocate descriptor */
p_vout = vlc_object_create( p_parent, VLC_OBJECT_VOUT );
if( p_vout == NULL )
{
msg_Err( p_parent, "out of memory" );
return NULL;
}
var_Create( p_vout, "intf-change", VLC_VAR_BOOL );
val.b_bool = VLC_TRUE;
var_Set( p_vout, "intf-change", val );
p_vout->b_override_aspect = VLC_FALSE;
/* If the parent is not a VOUT object, that means we are at the start of
* the video output pipe */
if( p_parent->i_object_type != VLC_OBJECT_VOUT )
{
char *psz_aspect = config_GetPsz( p_parent, "aspect-ratio" );
/* Check whether the user tried to override aspect ratio */
if( psz_aspect )
{
unsigned int i_new_aspect = i_aspect;
char *psz_parser = strchr( psz_aspect, ':' );
if( psz_parser )
{
*psz_parser++ = '\0';
i_new_aspect = atoi( psz_aspect ) * VOUT_ASPECT_FACTOR
/ atoi( psz_parser );
}
else
{
i_new_aspect = i_width * VOUT_ASPECT_FACTOR
* atof( psz_aspect )
/ i_height;
}
free( psz_aspect );
if( i_new_aspect && i_new_aspect != i_aspect )
{
int i_pgcd = ReduceHeight( i_new_aspect );
msg_Dbg( p_vout, "overriding source aspect ratio to %i:%i",
i_new_aspect / i_pgcd, VOUT_ASPECT_FACTOR / i_pgcd );
i_aspect = i_new_aspect;
p_vout->b_override_aspect = VLC_TRUE;
}
}
/* Look for the default filter configuration */
p_vout->psz_filter_chain = config_GetPsz( p_parent, "filter" );
}
else
{
/* continue the parent's filter chain */
char *psz_end;
psz_end = strchr( ((vout_thread_t *)p_parent)->psz_filter_chain, ':' );
if( psz_end && *(psz_end+1) )
p_vout->psz_filter_chain = strdup( psz_end+1 );
else p_vout->psz_filter_chain = NULL;
}
/* Choose the video output module */
if( !p_vout->psz_filter_chain || !*p_vout->psz_filter_chain )
{
psz_plugin = config_GetPsz( p_parent, "vout" );
}
else
{
/* the filter chain is a string list of filters separated by double
* colons */
char *psz_end;
psz_end = strchr( p_vout->psz_filter_chain, ':' );
if( psz_end )
psz_plugin = strndup( p_vout->psz_filter_chain,
psz_end - p_vout->psz_filter_chain );
else psz_plugin = strdup( p_vout->psz_filter_chain );
}
/* Initialize pictures and subpictures - translation tables and functions
* will be initialized later in InitThread */
for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES; i_index++)
{
p_vout->p_picture[i_index].pf_lock = NULL;
p_vout->p_picture[i_index].pf_unlock = NULL;
p_vout->p_picture[i_index].i_status = FREE_PICTURE;
p_vout->p_picture[i_index].i_type = EMPTY_PICTURE;
}
for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++)
{
p_vout->p_subpicture[i_index].i_status = FREE_SUBPICTURE;
p_vout->p_subpicture[i_index].i_type = EMPTY_SUBPICTURE;
}
/* No images in the heap */
p_vout->i_heap_size = 0;
/* Initialize the rendering heap */
I_RENDERPICTURES = 0;
p_vout->render.i_width = i_width;
p_vout->render.i_height = i_height;
p_vout->render.i_chroma = i_chroma;
p_vout->render.i_aspect = i_aspect;
p_vout->render.i_rmask = 0;
p_vout->render.i_gmask = 0;
p_vout->render.i_bmask = 0;
p_vout->render.i_last_used_pic = -1;
p_vout->render.b_allow_modify_pics = 1;
/* Zero the output heap */
I_OUTPUTPICTURES = 0;
p_vout->output.i_width = 0;
p_vout->output.i_height = 0;
p_vout->output.i_chroma = 0;
p_vout->output.i_aspect = 0;
p_vout->output.i_rmask = 0;
p_vout->output.i_gmask = 0;
p_vout->output.i_bmask = 0;
/* Initialize misc stuff */
p_vout->i_changes = 0;
p_vout->f_gamma = 0;
p_vout->b_grayscale = 0;
p_vout->b_info = 0;
p_vout->b_interface = 0;
p_vout->b_scale = 1;
p_vout->b_fullscreen = 0;
p_vout->render_time = 10;
p_vout->c_fps_samples = 0;
p_vout->b_filter_change = 0;
/* Mouse coordinates */
var_Create( p_vout, "mouse-x", VLC_VAR_INTEGER );
var_Create( p_vout, "mouse-y", VLC_VAR_INTEGER );
var_Create( p_vout, "mouse-button-down", VLC_VAR_INTEGER );
var_Create( p_vout, "mouse-moved", VLC_VAR_BOOL );
var_Create( p_vout, "mouse-clicked", VLC_VAR_INTEGER );
var_Create( p_vout, "key-pressed", VLC_VAR_STRING );
/* user requested fullscreen? */
if( config_GetInt( p_vout, "fullscreen" ) )
{
p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
}
/* Initialize the dimensions of the video window */
InitWindowSize( p_vout, &p_vout->i_window_width,
&p_vout->i_window_height );
p_vout->p_module = module_Need( p_vout,
( p_vout->psz_filter_chain &&
*p_vout->psz_filter_chain ) ?
"video filter" : "video output",
psz_plugin );
if( psz_plugin ) free( psz_plugin );
if( p_vout->p_module == NULL )
{
msg_Err( p_vout, "no suitable vout module" );
vlc_object_destroy( p_vout );
return NULL;
}
/* Calculate delay created by internal caching */
p_input_thread = (input_thread_t *)vlc_object_find( p_vout,
VLC_OBJECT_INPUT, FIND_ANYWHERE );
if( p_input_thread )
{
p_vout->i_pts_delay = p_input_thread->i_pts_delay;
vlc_object_release( p_input_thread );
}
else
{
p_vout->i_pts_delay = DEFAULT_PTS_DELAY;
}
/* Create thread and set locks */
vlc_mutex_init( p_vout, &p_vout->picture_lock );
vlc_mutex_init( p_vout, &p_vout->subpicture_lock );
vlc_mutex_init( p_vout, &p_vout->change_lock );
vlc_object_attach( p_vout, p_parent );
if( vlc_thread_create( p_vout, "video output", RunThread,
VLC_THREAD_PRIORITY_OUTPUT, VLC_FALSE ) )
{
msg_Err( p_vout, "out of memory" );
module_Unneed( p_vout, p_vout->p_module );
vlc_object_destroy( p_vout );
return NULL;
}
return p_vout;
}
/*****************************************************************************
* vout_Destroy: destroys a previously created video output
*****************************************************************************
* Destroy a terminated thread.
* The function will request a destruction of the specified thread. If pi_error
* is NULL, it will return once the thread is destroyed. Else, it will be
* update using one of the THREAD_* constants.
*****************************************************************************/
void vout_Destroy( vout_thread_t *p_vout )
{
/* Request thread destruction */
p_vout->b_die = VLC_TRUE;
vlc_thread_join( p_vout );
var_Destroy( p_vout, "intf-change" );
/* Free structure */
vlc_object_destroy( p_vout );
}
/*****************************************************************************
* InitThread: initialize video output thread
*****************************************************************************
* This function is called from RunThread and performs the second step of the
* initialization. It returns 0 on success. Note that the thread's flag are not
* modified inside this function.
*****************************************************************************/
static int InitThread( vout_thread_t *p_vout )
{
int i, i_pgcd;
vlc_mutex_lock( &p_vout->change_lock );
#ifdef STATS
p_vout->c_loops = 0;
#endif
/* Initialize output method, it allocates direct buffers for us */
if( p_vout->pf_init( p_vout ) )
{
vlc_mutex_unlock( &p_vout->change_lock );
return VLC_EGENERIC;
}
if( !I_OUTPUTPICTURES )
{
msg_Err( p_vout, "plugin was unable to allocate at least "
"one direct buffer" );
p_vout->pf_end( p_vout );
vlc_mutex_unlock( &p_vout->change_lock );
return VLC_EGENERIC;
}
if( I_OUTPUTPICTURES > VOUT_MAX_PICTURES )
{
msg_Err( p_vout, "plugin allocated too many direct buffers, "
"our internal buffers must have overflown." );
p_vout->pf_end( p_vout );
vlc_mutex_unlock( &p_vout->change_lock );
return VLC_EGENERIC;
}
msg_Dbg( p_vout, "got %i direct buffer(s)", I_OUTPUTPICTURES );
#if 0
if( !p_vout->psz_filter_chain )
{
char *psz_aspect = config_GetPsz( p_vout, "pixel-ratio" );
if( psz_aspect )
{
int i_new_aspect = p_vout->output.i_width * VOUT_ASPECT_FACTOR
* atof( psz_aspect )
/ p_vout->output.i_height;
free( psz_aspect );
if( i_new_aspect && i_new_aspect != p_vout->output.i_aspect )
{
int i_pgcd = ReduceHeight( i_new_aspect );
msg_Dbg( p_vout, "output ratio forced to %i:%i\n",
i_new_aspect / i_pgcd, VOUT_ASPECT_FACTOR / i_pgcd );
p_vout->output.i_aspect = i_new_aspect;
}
}
}
#endif
i_pgcd = ReduceHeight( p_vout->render.i_aspect );
msg_Dbg( p_vout,
"picture in %ix%i, chroma 0x%.8x (%4.4s), aspect ratio %i:%i",
p_vout->render.i_width, p_vout->render.i_height,
p_vout->render.i_chroma, (char*)&p_vout->render.i_chroma,
p_vout->render.i_aspect / i_pgcd, VOUT_ASPECT_FACTOR / i_pgcd );
i_pgcd = ReduceHeight( p_vout->output.i_aspect );
msg_Dbg( p_vout,
"picture out %ix%i, chroma 0x%.8x (%4.4s), aspect ratio %i:%i",
p_vout->output.i_width, p_vout->output.i_height,
p_vout->output.i_chroma, (char*)&p_vout->output.i_chroma,
p_vout->output.i_aspect / i_pgcd, VOUT_ASPECT_FACTOR / i_pgcd );
/* Calculate shifts from system-updated masks */
MaskToShift( &p_vout->output.i_lrshift, &p_vout->output.i_rrshift,
p_vout->output.i_rmask );
MaskToShift( &p_vout->output.i_lgshift, &p_vout->output.i_rgshift,
p_vout->output.i_gmask );
MaskToShift( &p_vout->output.i_lbshift, &p_vout->output.i_rbshift,
p_vout->output.i_bmask );
/* Check whether we managed to create direct buffers similar to
* the render buffers, ie same size and chroma */
if( ( p_vout->output.i_width == p_vout->render.i_width )
&& ( p_vout->output.i_height == p_vout->render.i_height )
&& ( vout_ChromaCmp( p_vout->output.i_chroma, p_vout->render.i_chroma ) ) )
{
/* Cool ! We have direct buffers, we can ask the decoder to
* directly decode into them ! Map the first render buffers to
* the first direct buffers, but keep the first direct buffer
* for memcpy operations */
p_vout->b_direct = 1;
for( i = 1; i < VOUT_MAX_PICTURES; i++ )
{
if( p_vout->p_picture[ i ].i_type != DIRECT_PICTURE &&
I_RENDERPICTURES >= VOUT_MIN_DIRECT_PICTURES - 1 &&
p_vout->p_picture[ i - 1 ].i_type == DIRECT_PICTURE )
{
/* We have enough direct buffers so there's no need to
* try to use system memory buffers. */
break;
}
PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
I_RENDERPICTURES++;
}
msg_Dbg( p_vout, "direct render, mapping "
"render pictures 0-%i to system pictures 1-%i",
VOUT_MAX_PICTURES - 2, VOUT_MAX_PICTURES - 1 );
}
else
{
/* Rats... Something is wrong here, we could not find an output
* plugin able to directly render what we decode. See if we can
* find a chroma plugin to do the conversion */
p_vout->b_direct = 0;
/* Choose the best module */
p_vout->chroma.p_module = module_Need( p_vout, "chroma", NULL );
if( p_vout->chroma.p_module == NULL )
{
msg_Err( p_vout, "no chroma module for %4.4s to %4.4s",
(char*)&p_vout->render.i_chroma,
(char*)&p_vout->output.i_chroma );
p_vout->pf_end( p_vout );
vlc_mutex_unlock( &p_vout->change_lock );
return VLC_EGENERIC;
}
msg_Dbg( p_vout, "indirect render, mapping "
"render pictures 0-%i to system pictures %i-%i",
VOUT_MAX_PICTURES - 1, I_OUTPUTPICTURES,
I_OUTPUTPICTURES + VOUT_MAX_PICTURES - 1 );
/* Append render buffers after the direct buffers */
for( i = I_OUTPUTPICTURES; i < 2 * VOUT_MAX_PICTURES; i++ )
{
PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
I_RENDERPICTURES++;
/* Check if we have enough render pictures */
if( I_RENDERPICTURES == VOUT_MAX_PICTURES )
break;
}
}
/* Link pictures back to their heap */
for( i = 0 ; i < I_RENDERPICTURES ; i++ )
{
PP_RENDERPICTURE[ i ]->p_heap = &p_vout->render;
}
for( i = 0 ; i < I_OUTPUTPICTURES ; i++ )
{
PP_OUTPUTPICTURE[ i ]->p_heap = &p_vout->output;
}
/* XXX XXX mark thread ready */
return VLC_SUCCESS;
}
/*****************************************************************************
* RunThread: video output thread
*****************************************************************************
* Video output thread. This function does only returns when the thread is
* terminated. It handles the pictures arriving in the video heap and the
* display device events.
*****************************************************************************/
static void RunThread( vout_thread_t *p_vout)
{
int i_index; /* index in heap */
int i_idle_loops = 0; /* loops without displaying a picture */
mtime_t current_date; /* current date */
mtime_t display_date; /* display date */
picture_t * p_picture; /* picture pointer */
picture_t * p_last_picture = NULL; /* last picture */
picture_t * p_directbuffer; /* direct buffer to display */
subpicture_t * p_subpic; /* subpicture pointer */
/*
* Initialize thread
*/
p_vout->b_error = InitThread( p_vout );
if( p_vout->b_error )
{
/* Destroy thread structures allocated by Create and InitThread */
DestroyThread( p_vout );
return;
}
/*
* Main loop - it is not executed if an error occured during
* initialization
*/
while( (!p_vout->b_die) && (!p_vout->b_error) )
{
/* Initialize loop variables */
p_picture = NULL;
display_date = 0;
current_date = mdate();
#ifdef STATS
p_vout->c_loops++;
if( !(p_vout->c_loops % VOUT_STATS_NB_LOOPS) )
{
msg_Dbg( p_vout, "picture heap: %d/%d",
I_RENDERPICTURES, p_vout->i_heap_size );
}
#endif
/*
* Find the picture to display (the one with the earliest date).
* This operation does not need lock, since only READY_PICTUREs
* are handled. */
for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
{
if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
&& ( (p_picture == NULL) ||
(PP_RENDERPICTURE[i_index]->date < display_date) ) )
{
p_picture = PP_RENDERPICTURE[i_index];
display_date = p_picture->date;
}
}
if( p_picture )
{
/* If we met the last picture, parse again to see whether there is
* a more appropriate one. */
if( p_picture == p_last_picture )
{
for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
{
if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
&& (PP_RENDERPICTURE[i_index] != p_last_picture)
&& ((p_picture == p_last_picture) ||
(PP_RENDERPICTURE[i_index]->date < display_date)) )
{
p_picture = PP_RENDERPICTURE[i_index];
display_date = p_picture->date;
}
}
}
/* If we found better than the last picture, destroy it */
if( p_last_picture && p_picture != p_last_picture )
{
vlc_mutex_lock( &p_vout->picture_lock );
if( p_last_picture->i_refcount )
{
p_last_picture->i_status = DISPLAYED_PICTURE;
}
else
{
p_last_picture->i_status = DESTROYED_PICTURE;
p_vout->i_heap_size--;
}
vlc_mutex_unlock( &p_vout->picture_lock );
p_last_picture = NULL;
}
/* Compute FPS rate */
p_vout->p_fps_sample[ p_vout->c_fps_samples++ % VOUT_FPS_SAMPLES ]
= display_date;
if( !p_picture->b_force &&
p_picture != p_last_picture &&
display_date < current_date + p_vout->render_time )
{
/* Picture is late: it will be destroyed and the thread
* will directly choose the next picture */
vlc_mutex_lock( &p_vout->picture_lock );
if( p_picture->i_refcount )
{
/* Pretend we displayed the picture, but don't destroy
* it since the decoder might still need it. */
p_picture->i_status = DISPLAYED_PICTURE;
}
else
{
/* Destroy the picture without displaying it */
p_picture->i_status = DESTROYED_PICTURE;
p_vout->i_heap_size--;
}
msg_Warn( p_vout, "late picture skipped ("I64Fd")",
current_date - display_date );
vlc_mutex_unlock( &p_vout->picture_lock );
continue;
}
if( display_date >
current_date + p_vout->i_pts_delay + VOUT_BOGUS_DELAY )
{
/* Picture is waaay too early: it will be destroyed */
vlc_mutex_lock( &p_vout->picture_lock );
if( p_picture->i_refcount )
{
/* Pretend we displayed the picture, but don't destroy
* it since the decoder might still need it. */
p_picture->i_status = DISPLAYED_PICTURE;
}
else
{
/* Destroy the picture without displaying it */
p_picture->i_status = DESTROYED_PICTURE;
p_vout->i_heap_size--;
}
msg_Warn( p_vout, "vout warning: early picture skipped "
"("I64Fd")", display_date - current_date
- p_vout->i_pts_delay );
vlc_mutex_unlock( &p_vout->picture_lock );
continue;
}
if( display_date > current_date + VOUT_DISPLAY_DELAY )
{
/* A picture is ready to be rendered, but its rendering date
* is far from the current one so the thread will perform an
* empty loop as if no picture were found. The picture state
* is unchanged */
p_picture = NULL;
display_date = 0;
}
else if( p_picture == p_last_picture )
{
/* We are asked to repeat the previous picture, but we first
* wait for a couple of idle loops */
if( i_idle_loops < 4 )
{
p_picture = NULL;
display_date = 0;
}
else
{
/* We set the display date to something high, otherwise
* we'll have lots of problems with late pictures */
display_date = current_date + p_vout->render_time;
}
}
}
if( p_picture == NULL )
{
i_idle_loops++;
}
/*
* Check for subpictures to display
*/
p_subpic = vout_SortSubPictures( p_vout, display_date );
/*
* Perform rendering
*/
p_directbuffer = vout_RenderPicture( p_vout, p_picture, p_subpic );
/*
* Call the plugin-specific rendering method if there is one
*/
if( p_picture != NULL && p_directbuffer != NULL && p_vout->pf_render )
{
/* Render the direct buffer returned by vout_RenderPicture */
p_vout->pf_render( p_vout, p_directbuffer );
}
/*
* Sleep, wake up
*/
if( display_date != 0 && p_directbuffer != NULL )
{
/* Store render time using a sliding mean */
p_vout->render_time += mdate() - current_date;
p_vout->render_time >>= 1;
}
/* Give back change lock */
vlc_mutex_unlock( &p_vout->change_lock );
/* Sleep a while or until a given date */
if( display_date != 0 )
{
mwait( display_date - VOUT_MWAIT_TOLERANCE );
}
else
{
msleep( VOUT_IDLE_SLEEP );
}
/* On awakening, take back lock and send immediately picture
* to display. */
vlc_mutex_lock( &p_vout->change_lock );
/*
* Display the previously rendered picture
*/
if( p_picture != NULL && p_directbuffer != NULL )
{
/* Display the direct buffer returned by vout_RenderPicture */
if( p_vout->pf_display )
{
p_vout->pf_display( p_vout, p_directbuffer );
}
/* Reinitialize idle loop count */
i_idle_loops = 0;
/* Tell the vout this was the last picture and that it does not
* need to be forced anymore. */
p_last_picture = p_picture;
p_last_picture->b_force = 0;
}
/*
* Check events and manage thread
*/
if( p_vout->pf_manage && p_vout->pf_manage( p_vout ) )
{
/* A fatal error occured, and the thread must terminate
* immediately, without displaying anything - setting b_error to 1
* causes the immediate end of the main while() loop. */
p_vout->b_error = 1;
}
if( p_vout->i_changes & VOUT_SIZE_CHANGE )
{
/* this must only happen when the vout plugin is incapable of
* rescaling the picture itself. In this case we need to destroy
* the current picture buffers and recreate new ones with the right
* dimensions */
int i;
p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
p_vout->pf_end( p_vout );
for( i = 0; i < I_OUTPUTPICTURES; i++ )
p_vout->p_picture[ i ].i_status = FREE_PICTURE;
I_OUTPUTPICTURES = 0;
if( p_vout->pf_init( p_vout ) )
{
msg_Err( p_vout, "cannot resize display" );
/* FIXME: pf_end will be called again in EndThread() */
p_vout->b_error = 1;
}
/* Need to reinitialise the chroma plugin */
p_vout->chroma.p_module->pf_deactivate( VLC_OBJECT(p_vout) );
p_vout->chroma.p_module->pf_activate( VLC_OBJECT(p_vout) );
}
}
/*
* Error loop - wait until the thread destruction is requested
*/
if( p_vout->b_error )
{
ErrorThread( p_vout );
}
/* End of thread */
EndThread( p_vout );
/* Destroy thread structures allocated by CreateThread */
DestroyThread( p_vout );
}
/*****************************************************************************
* ErrorThread: RunThread() error loop
*****************************************************************************
* This function is called when an error occured during thread main's loop. The
* thread can still receive feed, but must be ready to terminate as soon as
* possible.
*****************************************************************************/
static void ErrorThread( vout_thread_t *p_vout )
{
/* Wait until a `die' order */
while( !p_vout->b_die )
{
/* Sleep a while */
msleep( VOUT_IDLE_SLEEP );
}
}
/*****************************************************************************
* EndThread: thread destruction
*****************************************************************************
* This function is called when the thread ends after a sucessful
* initialization. It frees all ressources allocated by InitThread.
*****************************************************************************/
static void EndThread( vout_thread_t *p_vout )
{
int i_index; /* index in heap */
#ifdef STATS
{
struct tms cpu_usage;
times( &cpu_usage );
msg_Dbg( p_vout, "cpu usage (user: %d, system: %d)",
cpu_usage.tms_utime, cpu_usage.tms_stime );
}
#endif
if( !p_vout->b_direct )
{
module_Unneed( p_vout, p_vout->chroma.p_module );
}
/* Destroy all remaining pictures */
for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES; i_index++ )
{
if ( p_vout->p_picture[i_index].i_type == MEMORY_PICTURE )
{
free( p_vout->p_picture[i_index].p_data_orig );
}
}
/* Destroy all remaining subpictures */
for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++ )
{
if( p_vout->p_subpicture[i_index].i_status != FREE_SUBPICTURE )
{
vout_DestroySubPicture( p_vout,
&p_vout->p_subpicture[i_index] );
}
}
/* Destroy translation tables */
p_vout->pf_end( p_vout );
/* Release the change lock */
vlc_mutex_unlock( &p_vout->change_lock );
}
/*****************************************************************************
* DestroyThread: thread destruction
*****************************************************************************
* This function is called when the thread ends. It frees all ressources
* allocated by CreateThread. Status is available at this stage.
*****************************************************************************/
static void DestroyThread( vout_thread_t *p_vout )
{
/* Destroy the locks */
vlc_mutex_destroy( &p_vout->picture_lock );
vlc_mutex_destroy( &p_vout->subpicture_lock );
vlc_mutex_destroy( &p_vout->change_lock );
/* Release the module */
module_Unneed( p_vout, p_vout->p_module );
}
/* following functions are local */
static int ReduceHeight( int i_ratio )
{
int i_dummy = VOUT_ASPECT_FACTOR;
int i_pgcd = 1;
if( !i_ratio )
{
return i_pgcd;
}
/* VOUT_ASPECT_FACTOR is (2^7 * 3^3 * 5^3), we just check for 2, 3 and 5 */
while( !(i_ratio & 1) && !(i_dummy & 1) )
{
i_ratio >>= 1;
i_dummy >>= 1;
i_pgcd <<= 1;
}
while( !(i_ratio % 3) && !(i_dummy % 3) )
{
i_ratio /= 3;
i_dummy /= 3;
i_pgcd *= 3;
}
while( !(i_ratio % 5) && !(i_dummy % 5) )
{
i_ratio /= 5;
i_dummy /= 5;
i_pgcd *= 5;
}
return i_pgcd;
}
/*****************************************************************************
* BinaryLog: computes the base 2 log of a binary value
*****************************************************************************
* This functions is used by MaskToShift, to get a bit index from a binary
* value.
*****************************************************************************/
static int BinaryLog( uint32_t i )
{
int i_log = 0;
if( i == 0 ) return -31337;
if( i & 0xffff0000 ) i_log += 16;
if( i & 0xff00ff00 ) i_log += 8;
if( i & 0xf0f0f0f0 ) i_log += 4;
if( i & 0xcccccccc ) i_log += 2;
if( i & 0xaaaaaaaa ) i_log += 1;
return i_log;
}
/*****************************************************************************
* MaskToShift: transform a color mask into right and left shifts
*****************************************************************************
* This function is used for obtaining color shifts from masks.
*****************************************************************************/
static void MaskToShift( int *pi_left, int *pi_right, uint32_t i_mask )
{
uint32_t i_low, i_high; /* lower hand higher bits of the mask */
if( !i_mask )
{
*pi_left = *pi_right = 0;
return;
}
/* Get bits */
i_low = i_mask & (- (int32_t)i_mask); /* lower bit of the mask */
i_high = i_mask + i_low; /* higher bit of the mask */
/* Transform bits into an index */
i_low = BinaryLog (i_low);
i_high = BinaryLog (i_high);
/* Update pointers and return */
*pi_left = i_low;
*pi_right = (8 - i_high + i_low);
}
/*****************************************************************************
* InitWindowSize: find the initial dimensions the video window should have.
*****************************************************************************
* This function will check the "width", "height" and "zoom" config options and
* will calculate the size that the video window should have.
*****************************************************************************/
static void InitWindowSize( vout_thread_t *p_vout, int *pi_width,
int *pi_height )
{
int i_width, i_height;
uint64_t ll_zoom;
#define FP_FACTOR 1000 /* our fixed point factor */
i_width = config_GetInt( p_vout, "width" );
i_height = config_GetInt( p_vout, "height" );
ll_zoom = (uint64_t)( FP_FACTOR * config_GetFloat( p_vout, "zoom" ) );
if( (i_width >= 0) && (i_height >= 0))
{
*pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
*pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
return;
}
else if( i_width >= 0 )
{
*pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
*pi_height = (int)( i_width * ll_zoom * VOUT_ASPECT_FACTOR /
p_vout->render.i_aspect / FP_FACTOR );
return;
}
else if( i_height >= 0 )
{
*pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
*pi_width = (int)( i_height * ll_zoom * p_vout->render.i_aspect /
VOUT_ASPECT_FACTOR / FP_FACTOR );
return;
}
if( p_vout->render.i_height * p_vout->render.i_aspect
>= p_vout->render.i_width * VOUT_ASPECT_FACTOR )
{
*pi_width = (int)( p_vout->render.i_height * ll_zoom
* p_vout->render.i_aspect / VOUT_ASPECT_FACTOR / FP_FACTOR );
*pi_height = (int)( p_vout->render.i_height * ll_zoom / FP_FACTOR );
}
else
{
*pi_width = (int)( p_vout->render.i_width * ll_zoom / FP_FACTOR );
*pi_height = (int)( p_vout->render.i_width * ll_zoom
* VOUT_ASPECT_FACTOR / p_vout->render.i_aspect / FP_FACTOR );
}
#undef FP_FACTOR
}
/*****************************************************************************
* vout_VarCallback: generic callback for intf variables
*****************************************************************************/
int vout_VarCallback( vlc_object_t * p_this, const char * psz_variable,
vlc_value_t old_value, vlc_value_t new_value,
void * unused )
{
vout_thread_t * p_vout = (vout_thread_t *)p_this;
vlc_value_t val;
val.b_bool = 1;
var_Set( p_vout, "intf-change", val );
return 0;
}