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mpv/libvo/vo_vesa.c
nick da677ba40f Replacing -x, -y on -screenw, -screenh 
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@2334 b3059339-0415-0410-9bf9-f77b7e298cf2
2001-10-21 12:50:45 +00:00

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/*
* video_out_vesa.c
*
* Copyright (C) Nick Kurshev <nickols_k@mail.ru> - Oct 2001
*
* You can redistribute this file under terms and conditions
* GNU General Public licence v2.
* This file is partly based on vbetest.c from lrmi distributive.
*/
/*
TODO:
- DGA support (need volunteers who have corresponding hardware)
- hw YUV support (need volunteers who have corresponding hardware)
- double (triple) buffering (if it will really speedup playback).
- refresh rate support (need additional info from mplayer)
*/
#include <stdio.h>
#include <string.h>
#include <stddef.h>
#include <limits.h>
#include "config.h"
#include "video_out.h"
#include "video_out_internal.h"
#include "fastmemcpy.h"
#include "yuv2rgb.h"
#include "linux/lrmi.h"
#include "linux/vbelib.h"
#include "bswap.h"
#include "../postproc/swscale.h"
LIBVO_EXTERN(vesa)
extern int verbose;
#ifndef max
#define max(a,b) ((a)>(b)?(a):(b))
#endif
#ifndef min
#define min(a,b) ((a)<(b)?(a):(b))
#endif
static vo_info_t vo_info =
{
"VESA VBE 2.0 video output",
"vesa",
"Nick Kurshev <nickols_k@mail.ru>",
"Requires ROOT privileges"
};
/* driver data */
/*
TODO: for linear framebuffer mode:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
win.ptr = linear address of frame buffer;
win.low = 0;
win.high = vide_memory_size;
*/
struct win_frame
{
uint8_t *ptr; /* pointer to window's frame memory */
uint32_t low; /* lowest boundary of frame */
uint32_t high; /* highest boundary of frame */
uint8_t idx; /* indicates index of relocatable frame (A or B) */
};
static int vesa_zoom=0; /* software scaling */
static unsigned int scale_xinc=0;
static unsigned int scale_yinc=0;
static uint32_t image_width, image_height; /* source image dimension */
static int32_t x_offset,y_offset; /* to center image on screen */
static unsigned init_mode; /* mode before run of mplayer */
static void *init_state = NULL; /* state before run of mplayer */
static struct win_frame win; /* real-mode window to video memory */
static uint8_t *yuv_buffer = NULL; /* for yuv2rgb and sw_scaling */
static unsigned video_mode; /* selected video mode for playback */
static struct VesaModeInfoBlock video_mode_info;
static int flip_trigger = 0;
#define MOVIE_MODE (MODE_ATTR_COLOR | MODE_ATTR_GRAPHICS)
#define FRAME_MODE (MODE_WIN_RELOCATABLE | MODE_WIN_READABLE | MODE_WIN_WRITEABLE)
static char * vbeErrToStr(int err)
{
char *retval;
static char sbuff[80];
if((err & VBE_VESA_ERROR_MASK) == VBE_VESA_ERROR_MASK)
{
sprintf(sbuff,"VESA failed = 0x4f%x",(err & VBE_VESA_ERRCODE_MASK)>>8);
retval = sbuff;
}
else
switch(err)
{
case VBE_OK: retval = "No error"; break;
case VBE_VM86_FAIL: retval = "vm86() syscall failed"; break;
case VBE_OUT_OF_DOS_MEM: retval = "Out of DOS memory"; break;
case VBE_OUT_OF_MEM: retval = "Out of memory"; break;
default: sprintf(sbuff,"Uknown error: %i",err); retval=sbuff; break;
}
return retval;
}
#define PRINT_VBE_ERR(name,err) { printf("vo_vesa: %s returns: %s\n",name,vbeErrToStr(err)); fflush(stdout); }
static void vesa_term( void )
{
int err;
if((err=vbeRestoreState(init_state)) != VBE_OK) PRINT_VBE_ERR("vbeRestoreState",err);
if((err=vbeSetMode(init_mode,NULL)) != VBE_OK) PRINT_VBE_ERR("vbeSetMode",err);
free(yuv_buffer);
vbeDestroy();
}
#define VALID_WIN_FRAME(offset) (offset >= win.low && offset < win.high)
#define VIDEO_PTR(offset) (win.ptr + offset - win.low)
static inline void __vbeSwitchBank(unsigned long offset)
{
unsigned long gran;
unsigned new_offset;
int err;
gran = video_mode_info.WinGranularity*1024;
new_offset = offset / gran;
if((err=vbeSetWindow(win.idx,new_offset)) != VBE_OK)
{
PRINT_VBE_ERR("vbeSetWindow",err);
printf("vo_vesa: Fatal error occured! Can't continue\n");
vesa_term();
exit(-1);
}
win.low = new_offset * gran;
win.high = win.low + video_mode_info.WinSize*1024;
}
static void __vbeSetPixel(int x, int y, int r, int g, int b)
{
int x_res = video_mode_info.XResolution;
int y_res = video_mode_info.YResolution;
int shift_r = video_mode_info.RedFieldPosition;
int shift_g = video_mode_info.GreenFieldPosition;
int shift_b = video_mode_info.BlueFieldPosition;
int pixel_size = (video_mode_info.BitsPerPixel+7)/8;
int bpl = video_mode_info.BytesPerScanLine;
int color, offset;
if (x < 0 || x >= x_res || y < 0 || y >= y_res) return;
r >>= 8 - video_mode_info.RedMaskSize;
g >>= 8 - video_mode_info.GreenMaskSize;
b >>= 8 - video_mode_info.BlueMaskSize;
color = (r << shift_r) | (g << shift_g) | (b << shift_b);
offset = y * bpl + (x * pixel_size);
if(!VALID_WIN_FRAME(offset)) __vbeSwitchBank(offset);
memcpy(VIDEO_PTR(offset), &color, pixel_size);
}
/*
Copies line of frame to video memory. Data should be in the same format as video
memory.
*/
static void __vbeCopyBlock(unsigned long offset,uint8_t *image,unsigned long size)
{
unsigned long delta,src_idx = 0;
while(size)
{
if(!VALID_WIN_FRAME(offset)) __vbeSwitchBank(offset);
delta = min(size,win.high - offset);
memcpy(VIDEO_PTR(offset),&image[src_idx],delta);
src_idx += delta;
offset += delta;
size -= delta;
}
}
static void __vbeCopyBlockSwap(unsigned long offset,uint8_t *image,unsigned long size)
{
unsigned byte_len;
uint8_t ch;
while(size)
{
switch(video_mode_info.BitsPerPixel)
{
case 8: byte_len = 1; break;
default:
case 15:
printf("vo_vesa: Can't swap non byte aligned data\n");
vesa_term();
exit(-1);
case 16: *(image + offset) = ByteSwap16(*(image + offset));
byte_len = 2; break;
case 24: ch = *(image+offset);
*(image+offset) = *(image+offset+3);
*(image+offset+3) = ch;
byte_len = 3; break;
case 32: *(image + offset) = ByteSwap32(*(image + offset));
byte_len = 4; break;
}
__vbeCopyBlock(offset,image,byte_len);
size -= byte_len;
image += byte_len;
offset += byte_len;
}
}
/*
Copies frame to video memory. Data should be in the same format as video
memory.
*/
static void __vbeCopyData(uint8_t *image)
{
unsigned long i,j,image_offset,offset;
unsigned pixel_size,image_line_size,screen_line_size,x_shift;
pixel_size = (video_mode_info.BitsPerPixel+7)/8;
screen_line_size = video_mode_info.XResolution*pixel_size;
image_line_size = image_width*pixel_size;
if(image_width == video_mode_info.XResolution)
{
/* Special case for zooming */
__vbeCopyBlock(y_offset*screen_line_size,image,image_line_size*image_height);
}
else
{
x_shift = x_offset*pixel_size;
for(j=0,i=y_offset;j<image_height;i++,j++)
{
offset = i*screen_line_size+x_shift;
image_offset = j*image_line_size;
__vbeCopyBlock(offset,&image[image_offset],image_line_size);
}
}
}
/* is called for yuv only */
static uint32_t draw_slice(uint8_t *image[], int stride[], int w,int h,int x,int y)
{
if(vesa_zoom)
{
SwScale_YV12slice_brg24(image,stride,y,h,
yuv_buffer,
image_width*((video_mode_info.BitsPerPixel+7)/8),
image_width, video_mode_info.BitsPerPixel,
scale_xinc, scale_yinc);
}
else
{
uint8_t *yuv_slice;
yuv_slice=yuv_buffer+(image_width*y+x)*((video_mode_info.BitsPerPixel+7)/8);
yuv2rgb(yuv_slice, image[0], image[1], image[2], w, h,
image_width * ((video_mode_info.BitsPerPixel+7)/8),
stride[0], stride[1]);
}
flip_trigger = 1;
return 0;
}
static void draw_osd(void)
{
/* nothing to do for now */
}
static void flip_page(void)
{
if(flip_trigger) { __vbeCopyData(yuv_buffer); flip_trigger = 0; }
}
/* is called for rgb only */
static uint32_t draw_frame(uint8_t *src[])
{
__vbeCopyData(src[0]);
return 0;
}
static uint32_t query_format(uint32_t format)
{
uint32_t retval;
switch(format)
{
case IMGFMT_YV12:
#if 0 /* Should be tested better */
case IMGFMT_I420:
case IMGFMT_IYUV:
#endif
case IMGFMT_RGB8:
case IMGFMT_RGB15:
case IMGFMT_RGB16:
case IMGFMT_RGB24:
case IMGFMT_RGB32:
case IMGFMT_BGR8:
case IMGFMT_BGR15:
case IMGFMT_BGR16:
case IMGFMT_BGR24:
case IMGFMT_BGR32:
retval = 1; break;
default:
if(verbose)
printf("vo_vesa: unknown format: %x = %s\n",format,vo_format_name(format));
retval = 0;
}
return retval;
}
static void vesa_aspect(uint32_t width,uint32_t height,
uint32_t xres,uint32_t yres,
uint32_t *image_width,uint32_t *image_height)
{
float aspect_factor;
aspect_factor = (float)width / height;
*image_width = xres;
*image_height = xres /aspect_factor;
if(verbose) printf("vo_vesa: aspect factor = %f(%ux%u) *image=%ux%u screen=%ux%u\n",aspect_factor,width,height,*image_width,*image_height,xres,yres);
if((*image_height) > yres)
{
*image_height = yres;
*image_width = yres * aspect_factor;
if(verbose) printf("vo_vesa: Y > X therefore *image=%ux%u\n",*image_width,*image_height);
}
}
static char *model2str(unsigned char type)
{
char *retval;
switch(type)
{
case memText: retval = "Text"; break;
case memCGA: retval="CGA"; break;
case memHercules: retval="Hercules"; break;
case memPL: retval="Planar"; break;
case memPK: retval="Packed pixel"; break;
case mem256: retval="256"; break;
case memRGB: retval="Direct color RGB"; break;
case memYUV: retval="Direct color YUV"; break;
default: retval="Unknown"; break;
}
return retval;
}
/* fullscreen:
* bit 0 (0x01) means fullscreen (-fs)
* bit 1 (0x02) means mode switching (-vm)
* bit 2 (0x04) enables software scaling (-zoom)
* bit 3 (0x08) enables flipping (-flip)
*/
static uint32_t
init(uint32_t width, uint32_t height, uint32_t d_width, uint32_t d_height, uint32_t flags, char *title, uint32_t format)
{
struct VbeInfoBlock vib;
struct VesaModeInfoBlock vmib;
size_t i,num_modes;
uint32_t w,h;
unsigned short *mode_ptr,win_seg;
unsigned bpp,best_x = UINT_MAX,best_y=UINT_MAX,best_mode_idx = UINT_MAX;
int err;
image_width = width;
image_height = height;
if(flags & 0x8)
{
printf("vo_vesa: switch -flip is not supported\n");
}
if(flags & 0x04) vesa_zoom = 1;
if(flags & 0x01) vesa_zoom = 2;
if((err=vbeInit()) != VBE_OK) { PRINT_VBE_ERR("vbeInit",err); return -1; }
memcpy(vib.VESASignature,"VBE2",4);
if((err=vbeGetControllerInfo(&vib)) != VBE_OK)
{
PRINT_VBE_ERR("vbeGetControllerInfo",err);
printf("vo_vesa: possible reason: No VBE2 BIOS found\n");
return -1;
}
/* Print general info here */
printf("vo_vesa: Found VESA VBE BIOS Version %x.%x Revision: %x\n",
(int)(vib.VESAVersion >> 8) & 0xff,
(int)(vib.VESAVersion & 0xff),
(int)(vib.OemSoftwareRev & 0xffff));
printf("vo_vesa: Video memory: %u Kb\n",vib.TotalMemory*64);
printf("vo_vesa: VESA Capabilities: %s %s %s %s %s\n"
,vib.Capabilities & VBE_DAC_8BIT ? "8-bit DAC," : "6-bit DAC,"
,vib.Capabilities & VBE_NONVGA_CRTC ? "non-VGA CRTC,":"VGA CRTC,"
,vib.Capabilities & VBE_SNOWED_RAMDAC ? "snowed RAMDAC,":"normal RAMDAC,"
,vib.Capabilities & VBE_STEREOSCOPIC ? "stereoscopic,":"no stereoscopic,"
,vib.Capabilities & VBE_STEREO_EVC ? "Stereo EVC":"no stereo");
printf("vo_vesa: !!! Below will be printed OEM info. !!!\n");
printf("vo_vesa: You should watch 5 OEM related lines below else you've broken vm86\n");
printf("vo_vesa: OEM info: %s\n",vib.OemStringPtr);
printf("vo_vesa: OEM Revision: %x\n",vib.OemSoftwareRev);
printf("vo_vesa: OEM vendor: %s\n",vib.OemVendorNamePtr);
printf("vo_vesa: OEM Product Name: %s\n",vib.OemProductNamePtr);
printf("vo_vesa: OEM Product Rev: %s\n",vib.OemProductRevPtr);
printf("vo_vesa: Hint: To get workable TV-Out you should have plugged tv-connector in\n"
"vo_vesa: before booting PC since VESA BIOS initializes itself only during POST\n");
/* Find best mode here */
num_modes = 0;
mode_ptr = vib.VideoModePtr;
while(*mode_ptr++ != 0xffff) num_modes++;
if(vo_dbpp)
{
bpp = vo_dbpp;
if(format == IMGFMT_YV12 || format == IMGFMT_I420 || format == IMGFMT_IYUV)
yuv2rgb_init(bpp, MODE_RGB);
}
else
switch(format)
{
case IMGFMT_BGR8:
case IMGFMT_RGB8: bpp = 8; break;
case IMGFMT_BGR15:
case IMGFMT_RGB15: bpp = 15; break;
case IMGFMT_YV12:
case IMGFMT_I420:
case IMGFMT_IYUV: bpp=16;
yuv2rgb_init(bpp, MODE_RGB);
default:
case IMGFMT_BGR16:
case IMGFMT_RGB16: bpp = 16; break;
case IMGFMT_BGR24:
case IMGFMT_RGB24: bpp = 24; break;
case IMGFMT_BGR32:
case IMGFMT_RGB32: bpp = 32; break;
}
if(verbose)
{
printf("vo_vesa: Requested mode: %ux%u@%u (%s)\n",width,height,bpp,vo_format_name(format));
printf("vo_vesa: Total modes found: %u\n",num_modes);
mode_ptr = vib.VideoModePtr;
printf("vo_vesa: Mode list:");
for(i = 0;i < num_modes;i++)
{
printf(" %04X",mode_ptr[i]);
}
printf("\nvo_vesa: Modes in detail:\n");
}
mode_ptr = vib.VideoModePtr;
w = vo_screenwidth ? vo_screenwidth : width;
h = vo_screenheight ? vo_screenheight : height;
for(i=0;i < num_modes;i++)
{
if((err=vbeGetModeInfo(mode_ptr[i],&vmib)) != VBE_OK)
{
PRINT_VBE_ERR("vbeGetModeInfo",err);
return -1;
}
if(vmib.XResolution >= w &&
vmib.YResolution >= h &&
(vmib.ModeAttributes & MOVIE_MODE) == MOVIE_MODE &&
vmib.BitsPerPixel == bpp &&
vmib.MemoryModel == memRGB)
{
if(vmib.XResolution <= best_x &&
vmib.YResolution <= best_y)
{
best_x = vmib.XResolution;
best_y = vmib.YResolution;
best_mode_idx = i;
}
}
if(verbose)
{
printf("vo_vesa: Mode (%03u): mode=%04X %ux%u@%u attr=%04X\n"
"vo_vesa: #planes=%u model=%u(%s) #pages=%u\n"
"vo_vesa: winA=%X(attr=%u) winB=%X(attr=%u) winSize=%u winGran=%u\n"
"vo_vesa: direct_color=%u DGA_phys_addr=%08X\n"
,i,mode_ptr[i],vmib.XResolution,vmib.YResolution,vmib.BitsPerPixel,vmib.ModeAttributes
,vmib.NumberOfPlanes,vmib.MemoryModel,model2str(vmib.MemoryModel),vmib.NumberOfImagePages
,vmib.WinASegment,vmib.WinAAttributes,vmib.WinBSegment,vmib.WinBAttributes,vmib.WinSize,vmib.WinGranularity
,vmib.DirectColorModeInfo,vmib.PhysBasePtr);
if(vmib.MemoryModel == 6 || vmib.MemoryModel == 7)
printf("vo_vesa: direct_color_info = %u:%u:%u:%u\n"
,vmib.RedMaskSize,vmib.GreenMaskSize,vmib.BlueMaskSize,vmib.RsvdMaskSize);
fflush(stdout);
}
}
if(best_mode_idx != UINT_MAX)
{
video_mode = vib.VideoModePtr[best_mode_idx];
fflush(stdout);
if((err=vbeGetMode(&init_mode)) != VBE_OK)
{
PRINT_VBE_ERR("vbeGetMode",err);
return -1;
}
if(verbose) printf("vo_vesa: Initial video mode: %x\n",init_mode);
if((err=vbeGetModeInfo(video_mode,&video_mode_info)) != VBE_OK)
{
PRINT_VBE_ERR("vbeGetModeInfo",err);
return -1;
}
printf("vo_vesa: Using VESA mode (%u) = %x [%ux%u@%u]\n"
,best_mode_idx,video_mode,video_mode_info.XResolution
,video_mode_info.YResolution,video_mode_info.BitsPerPixel);
if( vesa_zoom )
{
if( format==IMGFMT_YV12 )
{
/* software scale */
if(vesa_zoom > 1)
{
image_width = video_mode_info.XResolution;
image_height = video_mode_info.YResolution;
}
else
vesa_aspect(width,height,
video_mode_info.XResolution,video_mode_info.YResolution,
&image_width,&image_height);
scale_xinc=(width << 16) / image_width - 2; /* needed for proper rounding */
scale_yinc=(height << 16) / image_height + 2;
SwScale_Init();
if(verbose) printf("vo_vesa: Using SCALE\n");
}
else
{
printf("vo_vesa: Can't apply zooming to non YV12 formats\n");
return -1;
}
}
if((video_mode_info.WinAAttributes & FRAME_MODE) == FRAME_MODE)
win.idx = 0; /* frame A */
else
if((video_mode_info.WinBAttributes & FRAME_MODE) == FRAME_MODE)
win.idx = 1; /* frame B */
else { printf("vo_vesa: Can't find usable frame of window\n"); return -1; }
if(!(win_seg = win.idx == 0 ? video_mode_info.WinASegment:video_mode_info.WinBSegment))
{
printf("vo_vesa: Can't find valid window address\n");
if(video_mode_info.ModeAttributes & MODE_ATTR_LINEAR)
printf("vo_vesa: Your BIOS supports DGA access which is not implemented for now\n");
return -1;
}
win.ptr = PhysToVirtSO(win_seg,0);
win.low = 0L;
win.high= video_mode_info.WinSize*1024;
if(video_mode_info.XResolution > image_width)
x_offset = (video_mode_info.XResolution - image_width) / 2;
else x_offset = 0;
if(video_mode_info.YResolution > image_height)
y_offset = (video_mode_info.YResolution - image_height) / 2;
else y_offset = 0;
if(verbose)
printf("vo_vesa: image: %ux%u screen = %ux%u x_offset = %u y_offset = %u\n"
,image_width,image_height
,video_mode_info.XResolution,video_mode_info.YResolution
,x_offset,y_offset);
if(!(yuv_buffer = malloc(image_width*image_height*bpp)))
{
printf("vo_vesa: Can't allocate temporary buffer\n");
return -1;
}
if((err=vbeSaveState(&init_state)) != VBE_OK)
{
PRINT_VBE_ERR("vbeSaveState",err);
return -1;
}
if((err=vbeSetMode(video_mode,NULL)) != VBE_OK)
{
PRINT_VBE_ERR("vbeSetMode",err);
return -1;
}
/* Now we are in video mode!!!*/
if(verbose)
{
printf("vo_vesa: Graphics mode was activated\n");
fflush(stdout);
}
}
else
{
printf("vo_vesa: Can't find mode for: %ux%u@%u\n",width,height,bpp);
return -1;
}
if(verbose)
{
printf("vo_vesa: VESA initialization complete\n");
fflush(stdout);
}
if(verbose)
{
int x_res = video_mode_info.XResolution;
int y_res = video_mode_info.YResolution;
int x, y;
for (y = 0; y < y_res; ++y)
{
for (x = 0; x < x_res; ++x)
{
int r, g, b;
if ((x & 16) ^ (y & 16))
{
r = x * 255 / x_res;
g = y * 255 / y_res;
b = 255 - x * 255 / x_res;
}
else
{
r = 255 - x * 255 / x_res;
g = y * 255 / y_res;
b = 255 - y * 255 / y_res;
}
__vbeSetPixel(x, y, r, g, b);
}
}
}
return 0;
}
static const vo_info_t*
get_info(void)
{
return &vo_info;
}
static void
uninit(void)
{
vesa_term();
}
static void check_events(void)
{
/* Nothing to do */
}
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