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mpv/libmpcodecs/vf_bmovl.c

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/* vf_bmovl.c v0.9.1 - BitMap OVerLay videofilter for MPlayer
*
* (C) 2002 Per Wigren <wigren@home.se>
* Licenced under the GNU General Public License
*
* Use MPlayer as a framebuffer to read bitmaps and commands from a FIFO
* and display them in the window.
*
* Commands are:
*
* RGBA32 width height xpos ypos alpha clear
* * Followed by width*height*4 bytes of raw RGBA32 data.
* ABGR32 width height xpos ypos alpha clear
* * Followed by width*height*4 bytes of raw ABGR32 data.
* RGB24 width height xpos ypos alpha clear
* * Followed by width*height*3 bytes of raw RGB32 data.
* BGR24 width height xpos ypos alpha clear
* * Followed by width*height*3 bytes of raw BGR32 data.
*
* ALPHA width height xpos ypos alpha
* * Change alpha for area
* CLEAR width height xpos ypos
* * Clear area
* OPAQUE
* * Disable all alpha transparency!
* Send "ALPHA 0 0 0 0 0" to enable again!
* HIDE
* * Hide bitmap
* SHOW
* * Show bitmap
*
* Arguments are:
* width, height Size of image/area
* xpos, ypos Start blitting at X/Y position
* alpha Set alpha difference. 0 means same as original.
* 255 makes everything opaque
* -255 makes everything transparent
* If you set this to -255 you can then send a sequence of
* ALPHA-commands to set the area to -225, -200, -175 etc
* for a nice fade-in-effect! ;)
* clear Clear the framebuffer before blitting. 1 means clear.
* If 0, the image will just be blitted on top of the old
* one, so you don't need to send 1,8MB of RGBA32 data
* everytime a small part of the screen is updated.
*
* Arguments for the filter are hidden:opaque:fifo
* For example 1:0:/tmp/myfifo.fifo will start the filter hidden, transparent
* and use /tmp/myfifo.fifo as the fifo.
*
* If you find bugs, please send me patches! ;)
*
* This filter was developed for use in Freevo (http://freevo.sf.net), but
* anyone is free to use it! ;)
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/time.h>
#include <fcntl.h>
#include "config.h"
#include "mp_image.h"
#include "vf.h"
#include "img_format.h"
#include "mp_msg.h"
#include "libavutil/common.h"
#include "libvo/fastmemcpy.h"
#define IS_RAWIMG 0x100
#define IS_IMG 0x200
#define NONE 0x000
#define IMG_RGBA32 0x101
#define IMG_ABGR32 0x102
#define IMG_RGB24 0x103
#define IMG_BGR24 0x104
#define IMG_PNG 0x201
#define CMD_CLEAR 0x001
#define CMD_ALPHA 0x002
#define TRUE 1
#define FALSE 0
#define INRANGE(a,b,c) ( ((a) < (b)) ? (b) : ( ((a) > (c)) ? (c) : (a) ) )
#define rgb2y(R,G,B) ( (( 263*R + 516*G + 100*B) >> 10) + 16 )
#define rgb2u(R,G,B) ( ((-152*R - 298*G + 450*B) >> 10) + 128 )
#define rgb2v(R,G,B) ( (( 450*R - 376*G - 73*B) >> 10) + 128 )
#define DBG(a) (mp_msg(MSGT_VFILTER, MSGL_DBG2, "DEBUG: %d\n", a))
struct vf_priv_s {
int w, h, x1, y1, x2, y2;
struct {
unsigned char *y, *u, *v, *a, *oa;
} bitmap;
int stream_fd;
fd_set stream_fdset;
int opaque, hidden;
};
static int
query_format(struct vf_instance* vf, unsigned int fmt){
if(fmt==IMGFMT_YV12) return VFCAP_CSP_SUPPORTED;
return 0;
}
static int
config(struct vf_instance* vf,
int width, int height, int d_width, int d_height,
unsigned int flags, unsigned int outfmt)
{
vf->priv->bitmap.y = malloc( width*height );
vf->priv->bitmap.u = malloc( width*height/4 );
vf->priv->bitmap.v = malloc( width*height/4 );
vf->priv->bitmap.a = malloc( width*height );
vf->priv->bitmap.oa = malloc( width*height );
if(!( vf->priv->bitmap.y &&
vf->priv->bitmap.u &&
vf->priv->bitmap.v &&
vf->priv->bitmap.a &&
vf->priv->bitmap.oa )) {
mp_msg(MSGT_VFILTER, MSGL_ERR, "vf_bmovl: Could not allocate memory for bitmap buffer: %s\n", strerror(errno) );
return FALSE;
}
// Set default to black...
memset( vf->priv->bitmap.u, 128, width*height/4 );
memset( vf->priv->bitmap.v, 128, width*height/4 );
vf->priv->w = vf->priv->x1 = width;
vf->priv->h = vf->priv->y1 = height;
vf->priv->y2 = vf->priv->x2 = 0;
return vf_next_config(vf, width, height, d_width, d_height, flags, outfmt);
}
static void
uninit(struct vf_instance *vf)
{
if(vf->priv) {
free(vf->priv->bitmap.y);
free(vf->priv->bitmap.u);
free(vf->priv->bitmap.v);
free(vf->priv->bitmap.a);
free(vf->priv->bitmap.oa);
if (vf->priv->stream_fd >= 0)
close(vf->priv->stream_fd);
free(vf->priv);
}
}
static int
_read_cmd(int fd, char *cmd, char *args) {
int done=FALSE, pos=0;
char tmp;
while(!done) {
if(! read( fd, &tmp, 1 ) ) return FALSE;
if( (tmp>='A' && tmp<='Z') || (tmp>='0' && tmp<='9') )
cmd[pos]=tmp;
else if(tmp == ' ') {
cmd[pos]='\0';
done=TRUE;
}
else if(tmp == '\n') {
cmd[pos]='\0';
args[0]='\0';
return TRUE;
}
if(pos++>20) {
cmd[0]='\0';
return TRUE;
}
}
done=FALSE; pos=0;
while(!done) {
if(! read( fd, &tmp, 1 ) ) return FALSE;
if( (tmp >= ' ') && (pos<100) ) args[pos]=tmp;
else {
args[pos]='\0';
done=TRUE;
}
pos++;
}
return TRUE;
}
static int
put_image(struct vf_instance* vf, mp_image_t* mpi, double pts){
int buf_x=0, buf_y=0, buf_pos=0;
int have, got, want;
int xpos=0, ypos=0, pos=0;
unsigned char red=0, green=0, blue=0;
int alpha;
mp_image_t* dmpi;
dmpi = vf_get_image(vf->next, mpi->imgfmt, MP_IMGTYPE_TEMP,
MP_IMGFLAG_ACCEPT_STRIDE | MP_IMGFLAG_PREFER_ALIGNED_STRIDE,
mpi->w, mpi->h);
memcpy_pic( dmpi->planes[0], mpi->planes[0], mpi->width, mpi->height, dmpi->stride[0], mpi->stride[0] );
memcpy_pic( dmpi->planes[1], mpi->planes[1], mpi->chroma_width, mpi->chroma_height, dmpi->stride[1], mpi->stride[1] );
memcpy_pic( dmpi->planes[2], mpi->planes[2], mpi->chroma_width, mpi->chroma_height, dmpi->stride[2], mpi->stride[2] );
if(vf->priv->stream_fd >= 0) {
struct timeval tv;
int ready;
FD_SET( vf->priv->stream_fd, &vf->priv->stream_fdset );
tv.tv_sec=0; tv.tv_usec=0;
ready = select( vf->priv->stream_fd+1, &vf->priv->stream_fdset, NULL, NULL, &tv );
if(ready > 0) {
// We've got new data from the FIFO
char cmd[20], args[100];
int imgw,imgh,imgx,imgy,clear,imgalpha,pxsz=1,command;
unsigned char *buffer = NULL;
if(! _read_cmd( vf->priv->stream_fd, cmd, args) ) {
mp_msg(MSGT_VFILTER, MSGL_ERR, "\nvf_bmovl: Error reading commands: %s\n\n", strerror(errno));
return FALSE;
}
mp_msg(MSGT_VFILTER, MSGL_DBG2, "\nDEBUG: Got: %s+%s\n", cmd, args);
command=NONE;
if ( strncmp(cmd,"RGBA32",6)==0 ) { pxsz=4; command = IMG_RGBA32; }
else if( strncmp(cmd,"ABGR32",6)==0 ) { pxsz=4; command = IMG_ABGR32; }
else if( strncmp(cmd,"RGB24" ,5)==0 ) { pxsz=3; command = IMG_RGB24; }
else if( strncmp(cmd,"BGR24" ,5)==0 ) { pxsz=3; command = IMG_BGR24; }
else if( strncmp(cmd,"CLEAR" ,5)==0 ) { pxsz=1; command = CMD_CLEAR; }
else if( strncmp(cmd,"ALPHA" ,5)==0 ) { pxsz=1; command = CMD_ALPHA; }
else if( strncmp(cmd,"OPAQUE",6)==0 ) vf->priv->opaque=TRUE;
else if( strncmp(cmd,"SHOW", 4)==0 ) vf->priv->hidden=FALSE;
else if( strncmp(cmd,"HIDE", 4)==0 ) vf->priv->hidden=TRUE;
else if( strncmp(cmd,"FLUSH" ,5)==0 ) return vf_next_put_image(vf, dmpi, MP_NOPTS_VALUE);
else {
mp_msg(MSGT_VFILTER, MSGL_WARN, "\nvf_bmovl: Unknown command: '%s'. Ignoring.\n", cmd);
return vf_next_put_image(vf, dmpi, MP_NOPTS_VALUE);
}
if(command == CMD_ALPHA) {
sscanf( args, "%d %d %d %d %d", &imgw, &imgh, &imgx, &imgy, &imgalpha);
mp_msg(MSGT_VFILTER, MSGL_DBG2, "\nDEBUG: ALPHA: %d %d %d %d %d\n\n",
imgw, imgh, imgx, imgy, imgalpha);
if(imgw==0 && imgh==0) vf->priv->opaque=FALSE;
}
if(command & IS_RAWIMG) {
sscanf( args, "%d %d %d %d %d %d",
&imgw, &imgh, &imgx, &imgy, &imgalpha, &clear);
mp_msg(MSGT_VFILTER, MSGL_DBG2, "\nDEBUG: RAWIMG: %d %d %d %d %d %d\n\n",
imgw, imgh, imgx, imgy, imgalpha, clear);
buffer = malloc(imgw*imgh*pxsz);
if(!buffer) {
mp_msg(MSGT_VFILTER, MSGL_WARN, "\nvf_bmovl: Couldn't allocate temporary buffer! Skipping...\n\n");
return vf_next_put_image(vf, dmpi, MP_NOPTS_VALUE);
}
/* pipes/sockets might need multiple calls to read(): */
want = (imgw*imgh*pxsz);
have = 0;
while (have < want) {
got = read( vf->priv->stream_fd, buffer+have, want-have );
if (got == 0) {
mp_msg(MSGT_VFILTER, MSGL_WARN, "\nvf_bmovl: premature EOF...\n\n");
break;
}
if (got < 0) {
mp_msg(MSGT_VFILTER, MSGL_WARN, "\nvf_bmovl: read error: %s\n\n", strerror(errno));
break;
}
have += got;
}
mp_msg(MSGT_VFILTER, MSGL_DBG2, "Got %d bytes... (wanted %d)\n", have, want );
if(clear) {
memset( vf->priv->bitmap.y, 0, vf->priv->w*vf->priv->h );
memset( vf->priv->bitmap.u, 128, vf->priv->w*vf->priv->h/4 );
memset( vf->priv->bitmap.v, 128, vf->priv->w*vf->priv->h/4 );
memset( vf->priv->bitmap.a, 0, vf->priv->w*vf->priv->h );
memset( vf->priv->bitmap.oa, 0, vf->priv->w*vf->priv->h );
vf->priv->x1 = dmpi->width;
vf->priv->y1 = dmpi->height;
vf->priv->x2 = vf->priv->y2 = 0;
}
// Define how much of our bitmap that contains graphics!
vf->priv->x1 = av_clip(imgx, 0, vf->priv->x1);
vf->priv->y1 = av_clip(imgy, 0, vf->priv->y1);
vf->priv->x2 = av_clip(imgx + imgw, vf->priv->x2, vf->priv->w);
vf->priv->y2 = av_clip(imgy + imgh, vf->priv->y2, vf->priv->h);
}
if( command == CMD_CLEAR ) {
sscanf( args, "%d %d %d %d", &imgw, &imgh, &imgx, &imgy);
mp_msg(MSGT_VFILTER, MSGL_DBG2, "\nDEBUG: CLEAR: %d %d %d %d\n\n", imgw, imgh, imgx, imgy);
for( ypos=imgy ; (ypos < (imgy+imgh)) && (ypos < vf->priv->y2) ; ypos++ ) {
memset( vf->priv->bitmap.y + (ypos*vf->priv->w) + imgx, 0, imgw );
memset( vf->priv->bitmap.a + (ypos*vf->priv->w) + imgx, 0, imgw );
memset( vf->priv->bitmap.oa + (ypos*vf->priv->w) + imgx, 0, imgw );
if(ypos%2) {
memset( vf->priv->bitmap.u + ((ypos/2)*dmpi->stride[1]) + (imgx/2), 128, imgw/2 );
memset( vf->priv->bitmap.v + ((ypos/2)*dmpi->stride[2]) + (imgx/2), 128, imgw/2 );
}
} // Recalculate area that contains graphics
if( (imgx <= vf->priv->x1) && ( (imgw+imgx) >= vf->priv->x2) ) {
if( (imgy <= vf->priv->y1) && ( (imgy+imgh) >= vf->priv->y1) )
vf->priv->y1 = imgy+imgh;
if( (imgy <= vf->priv->y2) && ( (imgy+imgh) >= vf->priv->y2) )
vf->priv->y2 = imgy;
}
if( (imgy <= vf->priv->y1) && ( (imgy+imgh) >= vf->priv->y2) ) {
if( (imgx <= vf->priv->x1) && ( (imgx+imgw) >= vf->priv->x1) )
vf->priv->x1 = imgx+imgw;
if( (imgx <= vf->priv->x2) && ( (imgx+imgw) >= vf->priv->x2) )
vf->priv->x2 = imgx;
}
return vf_next_put_image(vf, dmpi, MP_NOPTS_VALUE);
}
for( buf_y=0 ; (buf_y < imgh) && (buf_y < (vf->priv->h-imgy)) ; buf_y++ ) {
for( buf_x=0 ; (buf_x < (imgw*pxsz)) && (buf_x < ((vf->priv->w+imgx)*pxsz)) ; buf_x += pxsz ) {
if(command & IS_RAWIMG) buf_pos = (buf_y * imgw * pxsz) + buf_x;
pos = ((buf_y+imgy) * vf->priv->w) + ((buf_x/pxsz)+imgx);
switch(command) {
case IMG_RGBA32:
red = buffer[buf_pos+0];
green = buffer[buf_pos+1];
blue = buffer[buf_pos+2];
alpha = buffer[buf_pos+3];
break;
case IMG_ABGR32:
alpha = buffer[buf_pos+0];
blue = buffer[buf_pos+1];
green = buffer[buf_pos+2];
red = buffer[buf_pos+3];
break;
case IMG_RGB24:
red = buffer[buf_pos+0];
green = buffer[buf_pos+1];
blue = buffer[buf_pos+2];
alpha = 0xFF;
break;
case IMG_BGR24:
blue = buffer[buf_pos+0];
green = buffer[buf_pos+1];
red = buffer[buf_pos+2];
alpha = 0xFF;
break;
case CMD_ALPHA:
vf->priv->bitmap.a[pos] = INRANGE((vf->priv->bitmap.oa[pos]+imgalpha),0,255);
break;
default:
mp_msg(MSGT_VFILTER, MSGL_ERR, "vf_bmovl: Internal error!\n");
return FALSE;
}
if( command & IS_RAWIMG ) {
vf->priv->bitmap.y[pos] = rgb2y(red,green,blue);
vf->priv->bitmap.oa[pos] = alpha;
vf->priv->bitmap.a[pos] = INRANGE((alpha+imgalpha),0,255);
if((buf_y%2) && ((buf_x/pxsz)%2)) {
pos = ( ((buf_y+imgy)/2) * dmpi->stride[1] ) + (((buf_x/pxsz)+imgx)/2);
vf->priv->bitmap.u[pos] = rgb2u(red,green,blue);
vf->priv->bitmap.v[pos] = rgb2v(red,green,blue);
}
}
} // for buf_x
} // for buf_y
free (buffer);
} else if(ready < 0) {
mp_msg(MSGT_VFILTER, MSGL_WARN, "\nvf_bmovl: Error %d in fifo: %s\n\n", errno, strerror(errno));
}
}
if(vf->priv->hidden) return vf_next_put_image(vf, dmpi, MP_NOPTS_VALUE);
if(vf->priv->opaque) { // Just copy buffer memory to screen
for( ypos=vf->priv->y1 ; ypos < vf->priv->y2 ; ypos++ ) {
fast_memcpy( dmpi->planes[0] + (ypos*dmpi->stride[0]) + vf->priv->x1,
vf->priv->bitmap.y + (ypos*vf->priv->w) + vf->priv->x1,
vf->priv->x2 - vf->priv->x1 );
if(ypos%2) {
fast_memcpy( dmpi->planes[1] + ((ypos/2)*dmpi->stride[1]) + (vf->priv->x1/2),
vf->priv->bitmap.u + (((ypos/2)*(vf->priv->w)/2)) + (vf->priv->x1/2),
(vf->priv->x2 - vf->priv->x1)/2 );
fast_memcpy( dmpi->planes[2] + ((ypos/2)*dmpi->stride[2]) + (vf->priv->x1/2),
vf->priv->bitmap.v + (((ypos/2)*(vf->priv->w)/2)) + (vf->priv->x1/2),
(vf->priv->x2 - vf->priv->x1)/2 );
}
}
} else { // Blit the bitmap to the videoscreen, pixel for pixel
for( ypos=vf->priv->y1 ; ypos < vf->priv->y2 ; ypos++ ) {
for ( xpos=vf->priv->x1 ; xpos < vf->priv->x2 ; xpos++ ) {
pos = (ypos * dmpi->stride[0]) + xpos;
alpha = vf->priv->bitmap.a[pos];
if (alpha == 0) continue; // Completly transparent pixel
if (alpha == 255) { // Opaque pixel
dmpi->planes[0][pos] = vf->priv->bitmap.y[pos];
if ((ypos%2) && (xpos%2)) {
pos = ( (ypos/2) * dmpi->stride[1] ) + (xpos/2);
dmpi->planes[1][pos] = vf->priv->bitmap.u[pos];
dmpi->planes[2][pos] = vf->priv->bitmap.v[pos];
}
} else { // Alphablended pixel
dmpi->planes[0][pos] =
((255 - alpha) * (int)dmpi->planes[0][pos] +
alpha * (int)vf->priv->bitmap.y[pos]) >> 8;
if ((ypos%2) && (xpos%2)) {
pos = ( (ypos/2) * dmpi->stride[1] ) + (xpos/2);
dmpi->planes[1][pos] =
((255 - alpha) * (int)dmpi->planes[1][pos] +
alpha * (int)vf->priv->bitmap.u[pos]) >> 8;
dmpi->planes[2][pos] =
((255 - alpha) * (int)dmpi->planes[2][pos] +
alpha * (int)vf->priv->bitmap.v[pos]) >> 8;
}
}
} // for xpos
} // for ypos
} // if !opaque
return vf_next_put_image(vf, dmpi, MP_NOPTS_VALUE);
} // put_image
static int
vf_open(vf_instance_t* vf, char* args)
{
char filename[1000];
vf->config = config;
vf->put_image = put_image;
vf->query_format = query_format;
vf->uninit = uninit;
vf->priv = malloc(sizeof(struct vf_priv_s));
if(!args || sscanf(args, "%d:%d:%s", &vf->priv->hidden, &vf->priv->opaque, filename) < 3 ) {
mp_msg(MSGT_VFILTER, MSGL_ERR, "vf_bmovl: Bad arguments!\n");
mp_msg(MSGT_VFILTER, MSGL_ERR, "vf_bmovl: Arguments are 'bool hidden:bool opaque:string fifo'\n");
return FALSE;
}
vf->priv->stream_fd = open(filename, O_RDWR);
if(vf->priv->stream_fd >= 0) {
FD_ZERO( &vf->priv->stream_fdset );
mp_msg(MSGT_VFILTER, MSGL_INFO, "vf_bmovl: Opened fifo %s as FD %d\n", filename, vf->priv->stream_fd);
} else {
mp_msg(MSGT_VFILTER, MSGL_WARN, "vf_bmovl: Error! Couldn't open FIFO %s: %s\n", filename, strerror(errno));
vf->priv->stream_fd = -1;
}
return TRUE;
}
const vf_info_t vf_info_bmovl = {
"Read bitmaps from a FIFO and display them in window",
"bmovl",
"Per Wigren",
"",
vf_open,
NULL
};
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