home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
MacAddict 83
/
MacAddict_083_2003-07.iso
/
mac
/
Software
/
Development
/
VLC Source 0.5.3.dmg
/
src
/
video_output
/
vout_pictures.c
< prev
next >
Wrap
C/C++ Source or Header
|
2003-04-07
|
26KB
|
711 lines
/*****************************************************************************
* vout_pictures.c : picture management functions
*****************************************************************************
* Copyright (C) 2000 VideoLAN
* $Id: vout_pictures.c,v 1.36 2003/03/28 17:02:25 gbazin Exp $
*
* Authors: Vincent Seguin <seguin@via.ecp.fr>
* Samuel Hocevar <sam@zoy.org>
*
* 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 <stdio.h> /* sprintf() */
#include <string.h> /* strerror() */
#include <vlc/vlc.h>
#include "video.h"
#include "video_output.h"
#include "vout_pictures.h"
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static void CopyPicture( vout_thread_t *, picture_t *, picture_t * );
/*****************************************************************************
* vout_DisplayPicture: display a picture
*****************************************************************************
* Remove the reservation flag of a picture, which will cause it to be ready for
* display. The picture won't be displayed until vout_DatePicture has been
* called.
*****************************************************************************/
void vout_DisplayPicture( vout_thread_t *p_vout, picture_t *p_pic )
{
vlc_mutex_lock( &p_vout->picture_lock );
switch( p_pic->i_status )
{
case RESERVED_PICTURE:
p_pic->i_status = RESERVED_DISP_PICTURE;
break;
case RESERVED_DATED_PICTURE:
p_pic->i_status = READY_PICTURE;
break;
default:
msg_Err( p_vout, "picture to display %p has invalid status %d",
p_pic, p_pic->i_status );
break;
}
vlc_mutex_unlock( &p_vout->picture_lock );
}
/*****************************************************************************
* vout_DatePicture: date a picture
*****************************************************************************
* Remove the reservation flag of a picture, which will cause it to be ready
* for display. The picture won't be displayed until vout_DisplayPicture has
* been called.
*****************************************************************************/
void vout_DatePicture( vout_thread_t *p_vout,
picture_t *p_pic, mtime_t date )
{
vlc_mutex_lock( &p_vout->picture_lock );
p_pic->date = date;
switch( p_pic->i_status )
{
case RESERVED_PICTURE:
p_pic->i_status = RESERVED_DATED_PICTURE;
break;
case RESERVED_DISP_PICTURE:
p_pic->i_status = READY_PICTURE;
break;
default:
msg_Err( p_vout, "picture to date %p has invalid status %d",
p_pic, p_pic->i_status );
break;
}
vlc_mutex_unlock( &p_vout->picture_lock );
}
/*****************************************************************************
* vout_CreatePicture: allocate a picture in the video output heap.
*****************************************************************************
* This function creates a reserved image in the video output heap.
* A null pointer is returned if the function fails. This method provides an
* already allocated zone of memory in the picture data fields. It needs locking
* since several pictures can be created by several producers threads.
*****************************************************************************/
picture_t *vout_CreatePicture( vout_thread_t *p_vout,
vlc_bool_t b_progressive,
vlc_bool_t b_top_field_first,
vlc_bool_t b_repeat_first_field )
{
int i_pic; /* picture index */
picture_t * p_pic;
picture_t * p_freepic = NULL; /* first free picture */
/* Get lock */
vlc_mutex_lock( &p_vout->picture_lock );
/*
* Look for an empty place in the picture heap.
*/
for( i_pic = 0; i_pic < I_RENDERPICTURES; i_pic++ )
{
p_pic = PP_RENDERPICTURE[(p_vout->render.i_last_used_pic + i_pic + 1)
% I_RENDERPICTURES];
switch( p_pic->i_status )
{
case DESTROYED_PICTURE:
/* Memory will not be reallocated, and function can end
* immediately - this is the best possible case, since no
* memory allocation needs to be done */
p_pic->i_status = RESERVED_PICTURE;
p_pic->i_refcount = 0;
p_pic->b_force = 0;
p_pic->b_progressive = b_progressive;
p_pic->b_repeat_first_field = b_repeat_first_field;
p_pic->b_top_field_first = b_top_field_first;
p_vout->i_heap_size++;
p_vout->render.i_last_used_pic =
( p_vout->render.i_last_used_pic + i_pic + 1 )
% I_RENDERPICTURES;
vlc_mutex_unlock( &p_vout->picture_lock );
return( p_pic );
case FREE_PICTURE:
/* Picture is empty and ready for allocation */
p_vout->render.i_last_used_pic =
( p_vout->render.i_last_used_pic + i_pic + 1 )
% I_RENDERPICTURES;
p_freepic = p_pic;
break;
default:
break;
}
}
/*
* Prepare picture
*/
if( p_freepic != NULL )
{
vout_AllocatePicture( p_vout, p_freepic,
p_vout->render.i_width, p_vout->render.i_height,
p_vout->render.i_chroma );
if( p_freepic->i_planes )
{
/* Copy picture information, set some default values */
p_freepic->i_status = RESERVED_PICTURE;
p_freepic->i_type = MEMORY_PICTURE;
p_freepic->i_refcount = 0;
p_freepic->b_force = 0;
p_freepic->b_progressive = b_progressive;
p_freepic->b_repeat_first_field = b_repeat_first_field;
p_freepic->b_top_field_first = b_top_field_first;
p_freepic->i_matrix_coefficients = 1;
p_vout->i_heap_size++;
}
else
{
/* Memory allocation failed : set picture as empty */
p_freepic->i_status = FREE_PICTURE;
p_freepic = NULL;
msg_Err( p_vout, "picture allocation failed" );
}
vlc_mutex_unlock( &p_vout->picture_lock );
return( p_freepic );
}
/* No free or destroyed picture could be found, but the decoder
* will try again in a while. */
vlc_mutex_unlock( &p_vout->picture_lock );
return( NULL );
}
/*****************************************************************************
* vout_DestroyPicture: remove a permanent or reserved picture from the heap
*****************************************************************************
* This function frees a previously reserved picture or a permanent
* picture. It is meant to be used when the construction of a picture aborted.
* Note that the picture will be destroyed even if it is linked !
*****************************************************************************/
void vout_DestroyPicture( vout_thread_t *p_vout, picture_t *p_pic )
{
vlc_mutex_lock( &p_vout->picture_lock );
#ifdef DEBUG
/* Check if picture status is valid */
if( (p_pic->i_status != RESERVED_PICTURE) &&
(p_pic->i_status != RESERVED_DATED_PICTURE) &&
(p_pic->i_status != RESERVED_DISP_PICTURE) )
{
msg_Err( p_vout, "picture to destroy %p has invalid status %d",
p_pic, p_pic->i_status );
}
#endif
p_pic->i_status = DESTROYED_PICTURE;
p_vout->i_heap_size--;
vlc_mutex_unlock( &p_vout->picture_lock );
}
/*****************************************************************************
* vout_LinkPicture: increment reference counter of a picture
*****************************************************************************
* This function increments the reference counter of a picture in the video
* heap. It needs a lock since several producer threads can access the picture.
*****************************************************************************/
void vout_LinkPicture( vout_thread_t *p_vout, picture_t *p_pic )
{
vlc_mutex_lock( &p_vout->picture_lock );
p_pic->i_refcount++;
vlc_mutex_unlock( &p_vout->picture_lock );
}
/*****************************************************************************
* vout_UnlinkPicture: decrement reference counter of a picture
*****************************************************************************
* This function decrement the reference counter of a picture in the video heap.
*****************************************************************************/
void vout_UnlinkPicture( vout_thread_t *p_vout, picture_t *p_pic )
{
vlc_mutex_lock( &p_vout->picture_lock );
p_pic->i_refcount--;
if( p_pic->i_refcount < 0 )
{
msg_Err( p_vout, "picture refcount is %i", p_pic->i_refcount );
p_pic->i_refcount = 0;
}
if( ( p_pic->i_refcount == 0 ) &&
( p_pic->i_status == DISPLAYED_PICTURE ) )
{
p_pic->i_status = DESTROYED_PICTURE;
p_vout->i_heap_size--;
}
vlc_mutex_unlock( &p_vout->picture_lock );
}
/*****************************************************************************
* vout_RenderPicture: render a picture
*****************************************************************************
* This function chooses whether the current picture needs to be copied
* before rendering, does the subpicture magic, and tells the video output
* thread which direct buffer needs to be displayed.
*****************************************************************************/
picture_t * vout_RenderPicture( vout_thread_t *p_vout, picture_t *p_pic,
subpicture_t *p_subpic )
{
if( p_pic == NULL )
{
/* XXX: subtitles */
return NULL;
}
if( p_pic->i_type == DIRECT_PICTURE )
{
if( !p_vout->render.b_allow_modify_pics || p_pic->i_refcount )
{
/* Picture is in a direct buffer and is still in use,
* we need to copy it to another direct buffer before
* displaying it if there are subtitles. */
if( p_subpic != NULL )
{
/* We have subtitles. First copy the picture to
* the spare direct buffer, then render the
* subtitles. */
CopyPicture( p_vout, p_pic, PP_OUTPUTPICTURE[0] );
vout_RenderSubPictures( p_vout, PP_OUTPUTPICTURE[0], p_subpic );
return PP_OUTPUTPICTURE[0];
}
/* No subtitles, picture is in a directbuffer so
* we can display it directly even if it is still
* in use. */
return p_pic;
}
/* Picture is in a direct buffer but isn't used by the
* decoder. We can safely render subtitles on it and
* display it. */
vout_RenderSubPictures( p_vout, p_pic, p_subpic );
return p_pic;
}
/* Not a direct buffer. We either need to copy it to a direct buffer,
* or render it if the chroma isn't the same. */
if( p_vout->b_direct )
{
/* Picture is not in a direct buffer, but is exactly the
* same size as the direct buffers. A memcpy() is enough,
* then render the subtitles. */
if( PP_OUTPUTPICTURE[0]->pf_lock )
if( PP_OUTPUTPICTURE[0]->pf_lock( p_vout, PP_OUTPUTPICTURE[0] ) )
{
if( PP_OUTPUTPICTURE[0]->pf_unlock )
PP_OUTPUTPICTURE[0]->pf_unlock( p_vout, PP_OUTPUTPICTURE[0] );
return NULL;
}
CopyPicture( p_vout, p_pic, PP_OUTPUTPICTURE[0] );
vout_RenderSubPictures( p_vout, PP_OUTPUTPICTURE[0], p_subpic );
if( PP_OUTPUTPICTURE[0]->pf_unlock )
PP_OUTPUTPICTURE[0]->pf_unlock( p_vout, PP_OUTPUTPICTURE[0] );
return PP_OUTPUTPICTURE[0];
}
/* Picture is not in a direct buffer, and needs to be converted to
* another size/chroma. Then the subtitles need to be rendered as
* well. This usually means software YUV, or hardware YUV with a
* different chroma. */
if( p_vout->p_picture[0].pf_lock )
if( p_vout->p_picture[0].pf_lock( p_vout, &p_vout->p_picture[0] ) )
return NULL;
/* Convert image to the first direct buffer */
p_vout->chroma.pf_convert( p_vout, p_pic, &p_vout->p_picture[0] );
/* Render subpictures on the first direct buffer */
vout_RenderSubPictures( p_vout, &p_vout->p_picture[0], p_subpic );
if( p_vout->p_picture[0].pf_unlock )
p_vout->p_picture[0].pf_unlock( p_vout, &p_vout->p_picture[0] );
return &p_vout->p_picture[0];
}
/*****************************************************************************
* vout_PlacePicture: calculate image window coordinates
*****************************************************************************
* This function will be accessed by plugins. It calculates the relative
* position of the output window and the image window.
*****************************************************************************/
void vout_PlacePicture( vout_thread_t *p_vout,
unsigned int i_width, unsigned int i_height,
unsigned int *pi_x, unsigned int *pi_y,
unsigned int *pi_width, unsigned int *pi_height )
{
if( (i_width <= 0) || (i_height <=0) )
{
*pi_width = *pi_height = *pi_x = *pi_y = 0;
return;
}
if( p_vout->b_scale )
{
*pi_width = i_width;
*pi_height = i_height;
}
else
{
*pi_width = __MIN( i_width, p_vout->render.i_width );
*pi_height = __MIN( i_height, p_vout->render.i_height );
}
if( VOUT_ASPECT_FACTOR * *pi_width / *pi_height < p_vout->render.i_aspect )
{
*pi_width = *pi_height * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR;
}
else
{
*pi_height = *pi_width * VOUT_ASPECT_FACTOR / p_vout->render.i_aspect;
}
if( *pi_width > i_width )
{
*pi_width = i_width;
*pi_height = VOUT_ASPECT_FACTOR * *pi_width / p_vout->render.i_aspect;
}
if( *pi_height > i_height )
{
*pi_height = i_height;
*pi_width = *pi_height * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR;
}
*pi_x = ( i_width - *pi_width ) / 2;
*pi_y = ( i_height - *pi_height ) / 2;
}
/*****************************************************************************
* vout_AllocatePicture: allocate a new picture in the heap.
*****************************************************************************
* This function allocates a fake direct buffer in memory, which can be
* used exactly like a video buffer. The video output thread then manages
* how it gets displayed.
*****************************************************************************/
void vout_AllocatePicture( vout_thread_t *p_vout, picture_t *p_pic,
int i_width, int i_height, vlc_fourcc_t i_chroma )
{
int i_bytes, i_index;
/* Store default values */
for( i_index = 0; i_index < VOUT_MAX_PLANES; i_index++ )
{
p_pic->p[i_index].p_pixels = NULL;
p_pic->p[i_index].i_pixel_pitch = 1;
}
/* Calculate coordinates */
switch( i_chroma )
{
case FOURCC_I410:
p_pic->p[ Y_PLANE ].i_lines = i_height;
p_pic->p[ Y_PLANE ].i_pitch = i_width;
p_pic->p[ Y_PLANE ].i_visible_pitch = p_pic->p[ Y_PLANE ].i_pitch;
p_pic->p[ U_PLANE ].i_lines = i_height / 4;
p_pic->p[ U_PLANE ].i_pitch = i_width / 4;
p_pic->p[ U_PLANE ].i_visible_pitch = p_pic->p[ U_PLANE ].i_pitch;
p_pic->p[ V_PLANE ].i_lines = i_height / 4;
p_pic->p[ V_PLANE ].i_pitch = i_width / 4;
p_pic->p[ V_PLANE ].i_visible_pitch = p_pic->p[ V_PLANE ].i_pitch;
p_pic->i_planes = 3;
break;
case FOURCC_YV12:
case FOURCC_I420:
case FOURCC_IYUV:
p_pic->p[ Y_PLANE ].i_lines = i_height;
p_pic->p[ Y_PLANE ].i_pitch = i_width;
p_pic->p[ Y_PLANE ].i_visible_pitch = p_pic->p[ Y_PLANE ].i_pitch;
p_pic->p[ U_PLANE ].i_lines = i_height / 2;
p_pic->p[ U_PLANE ].i_pitch = i_width / 2;
p_pic->p[ U_PLANE ].i_visible_pitch = p_pic->p[ U_PLANE ].i_pitch;
p_pic->p[ V_PLANE ].i_lines = i_height / 2;
p_pic->p[ V_PLANE ].i_pitch = i_width / 2;
p_pic->p[ V_PLANE ].i_visible_pitch = p_pic->p[ V_PLANE ].i_pitch;
p_pic->i_planes = 3;
break;
case FOURCC_I422:
p_pic->p[ Y_PLANE ].i_lines = i_height;
p_pic->p[ Y_PLANE ].i_pitch = i_width;
p_pic->p[ Y_PLANE ].i_visible_pitch = p_pic->p[ Y_PLANE ].i_pitch;
p_pic->p[ U_PLANE ].i_lines = i_height;
p_pic->p[ U_PLANE ].i_pitch = i_width / 2;
p_pic->p[ U_PLANE ].i_visible_pitch = p_pic->p[ U_PLANE ].i_pitch;
p_pic->p[ V_PLANE ].i_lines = i_height;
p_pic->p[ V_PLANE ].i_pitch = i_width / 2;
p_pic->p[ V_PLANE ].i_visible_pitch = p_pic->p[ V_PLANE ].i_pitch;
p_pic->i_planes = 3;
break;
case FOURCC_I444:
p_pic->p[ Y_PLANE ].i_lines = i_height;
p_pic->p[ Y_PLANE ].i_pitch = i_width;
p_pic->p[ Y_PLANE ].i_visible_pitch = p_pic->p[ Y_PLANE ].i_pitch;
p_pic->p[ U_PLANE ].i_lines = i_height;
p_pic->p[ U_PLANE ].i_pitch = i_width;
p_pic->p[ U_PLANE ].i_visible_pitch = p_pic->p[ U_PLANE ].i_pitch;
p_pic->p[ V_PLANE ].i_lines = i_height;
p_pic->p[ V_PLANE ].i_pitch = i_width;
p_pic->p[ V_PLANE ].i_visible_pitch = p_pic->p[ V_PLANE ].i_pitch;
p_pic->i_planes = 3;
break;
case FOURCC_Y211:
p_pic->p->i_lines = i_height;
p_pic->p->i_pitch = i_width;
p_pic->p->i_visible_pitch = p_pic->p->i_pitch;
p_pic->p->i_pixel_pitch = 4;
p_pic->i_planes = 1;
break;
case FOURCC_YUY2:
p_pic->p->i_lines = i_height;
p_pic->p->i_pitch = i_width * 2;
p_pic->p->i_visible_pitch = p_pic->p->i_pitch;
p_pic->p->i_pixel_pitch = 4;
p_pic->i_planes = 1;
break;
case FOURCC_RGB2:
p_pic->p->i_lines = i_height;
p_pic->p->i_pitch = i_width;
p_pic->p->i_visible_pitch = p_pic->p->i_pitch;
p_pic->p->i_pixel_pitch = 1;
p_pic->i_planes = 1;
break;
case FOURCC_RV15:
p_pic->p->i_lines = i_height;
p_pic->p->i_pitch = i_width * 2;
p_pic->p->i_visible_pitch = p_pic->p->i_pitch;
p_pic->p->i_pixel_pitch = 2;
/* FIXME: p_heap isn't always reachable
p_pic->p_heap->i_rmask = 0x001f;
p_pic->p_heap->i_gmask = 0x03e0;
p_pic->p_heap->i_bmask = 0x7c00; */
p_pic->i_planes = 1;
break;
case FOURCC_RV16:
p_pic->p->i_lines = i_height;
p_pic->p->i_pitch = i_width * 2;
p_pic->p->i_visible_pitch = p_pic->p->i_pitch;
p_pic->p->i_pixel_pitch = 2;
/* FIXME: p_heap isn't always reachable
p_pic->p_heap->i_rmask = 0x001f;
p_pic->p_heap->i_gmask = 0x07e0;
p_pic->p_heap->i_bmask = 0xf800; */
p_pic->i_planes = 1;
break;
case FOURCC_RV24:
p_pic->p->i_lines = i_height;
p_pic->p->i_pitch = i_width * 3;
p_pic->p->i_visible_pitch = p_pic->p->i_pitch;
p_pic->p->i_pixel_pitch = 3;
/* FIXME: p_heap isn't always reachable
p_pic->p_heap->i_rmask = 0xff0000;
p_pic->p_heap->i_gmask = 0x00ff00;
p_pic->p_heap->i_bmask = 0x0000ff; */
p_pic->i_planes = 1;
break;
case FOURCC_RV32:
p_pic->p->i_lines = i_height;
p_pic->p->i_pitch = i_width * 4;
p_pic->p->i_visible_pitch = p_pic->p->i_pitch;
p_pic->p->i_pixel_pitch = 4;
/* FIXME: p_heap isn't always reachable
p_pic->p_heap->i_rmask = 0xff0000;
p_pic->p_heap->i_gmask = 0x00ff00;
p_pic->p_heap->i_bmask = 0x0000ff; */
p_pic->i_planes = 1;
break;
default:
msg_Err( p_vout, "unknown chroma type 0x%.8x (%4.4s)",
i_chroma, (char*)&i_chroma );
p_pic->i_planes = 0;
return;
}
/* Calculate how big the new image should be */
for( i_bytes = 0, i_index = 0; i_index < p_pic->i_planes; i_index++ )
{
i_bytes += p_pic->p[ i_index ].i_lines * p_pic->p[ i_index ].i_pitch;
}
p_pic->p_data = vlc_memalign( &p_pic->p_data_orig, 16, i_bytes );
if( p_pic->p_data == NULL )
{
p_pic->i_planes = 0;
return;
}
/* Fill the p_pixels field for each plane */
p_pic->p[ 0 ].p_pixels = p_pic->p_data;
for( i_index = 1; i_index < p_pic->i_planes; i_index++ )
{
p_pic->p[i_index].p_pixels = p_pic->p[i_index-1].p_pixels
+ p_pic->p[i_index-1].i_lines
* p_pic->p[i_index-1].i_pitch;
}
}
/*****************************************************************************
* vout_ChromaCmp: compare two chroma values
*****************************************************************************
* This function returns 1 if the two fourcc values given as argument are
* the same format (eg. UYVY / UYNV) or almost the same format (eg. I420/YV12)
*****************************************************************************/
int vout_ChromaCmp( vlc_fourcc_t i_chroma, vlc_fourcc_t i_amorhc )
{
/* If they are the same, they are the same ! */
if( i_chroma == i_amorhc )
{
return 1;
}
/* Check for equivalence classes */
switch( i_chroma )
{
case FOURCC_I420:
case FOURCC_IYUV:
case FOURCC_YV12:
switch( i_amorhc )
{
case FOURCC_I420:
case FOURCC_IYUV:
case FOURCC_YV12:
return 1;
default:
return 0;
}
case FOURCC_UYVY:
case FOURCC_UYNV:
case FOURCC_Y422:
switch( i_amorhc )
{
case FOURCC_UYVY:
case FOURCC_UYNV:
case FOURCC_Y422:
return 1;
default:
return 0;
}
case FOURCC_YUY2:
case FOURCC_YUNV:
switch( i_amorhc )
{
case FOURCC_YUY2:
case FOURCC_YUNV:
return 1;
default:
return 0;
}
default:
return 0;
}
}
/* Following functions are local */
/*****************************************************************************
* CopyPicture: copy a picture to another one
*****************************************************************************
* This function takes advantage of the image format, and reduces the
* number of calls to memcpy() to the minimum. Source and destination
* images must have same width (hence i_visible_pitch), height, and chroma.
*****************************************************************************/
static void CopyPicture( vout_thread_t * p_vout,
picture_t *p_src, picture_t *p_dest )
{
int i;
for( i = 0; i < p_src->i_planes ; i++ )
{
if( p_src->p[i].i_pitch == p_dest->p[i].i_pitch )
{
/* There are margins, but with the same width : perfect ! */
p_vout->p_vlc->pf_memcpy(
p_dest->p[i].p_pixels, p_src->p[i].p_pixels,
p_src->p[i].i_pitch * p_src->p[i].i_lines );
}
else
{
/* We need to proceed line by line */
uint8_t *p_in = p_src->p[i].p_pixels;
uint8_t *p_out = p_dest->p[i].p_pixels;
int i_line;
for( i_line = p_src->p[i].i_lines; i_line--; )
{
p_vout->p_vlc->pf_memcpy( p_out, p_in,
p_src->p[i].i_visible_pitch );
p_in += p_src->p[i].i_pitch;
p_out += p_dest->p[i].i_pitch;
}
}
}
p_dest->date = p_src->date;
}