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mpv/libvo/vo_png.c

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C
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#define DISP
/*
* vo_png.c, Portable Network Graphics Renderer for Mplayer
*
* Copyright 2001 by Felix Buenemann <atmosfear@users.sourceforge.net>
*
* Uses libpng (which uses zlib), so see according licenses.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <png.h>
//#include "/usr/include/png.h"
#include "config.h"
#include "video_out.h"
#include "video_out_internal.h"
#include "../postproc/swscale.h"
#include "../postproc/rgb2rgb.h"
LIBVO_EXTERN (png)
static vo_info_t vo_info =
{
"PNG file",
"png",
"Felix Buenemann <atmosfear@users.sourceforge.net>",
""
};
#define RGB 0
#define BGR 1
extern int verbose;
int z_compression = Z_NO_COMPRESSION;
static int image_width;
static int image_height;
static int image_format;
static uint8_t *image_data=NULL;
//static char *image_data;
static unsigned int scale_srcW = 0, scale_srcH = 0;
static int bpp = 24;
static int cspace = RGB;
static int framenum = 0;
struct pngdata {
FILE * fp;
png_structp png_ptr;
png_infop info_ptr;
enum {OK,ERROR} status;
};
static void draw_alpha(int x0,int y0, int w,int h, unsigned char* src, unsigned char *srca, int stride){
vo_draw_alpha_rgb24(w, h, src, srca, stride, image_data + 3 * (y0 * image_width + x0), 3 * image_width);
}
static uint32_t
config(uint32_t width, uint32_t height, uint32_t d_width, uint32_t d_height, uint32_t fullscreen, char *title, uint32_t format,const vo_tune_info_t *info)
{
if (fullscreen&0x04 && (width != d_width || height != d_height) &&
((format==IMGFMT_YV12) /*|| (format == IMGFMT_I420) || (format == IMGFMT_IYUV)*/)) {
/* software scaling */
image_width = (d_width + 7) & ~7;
image_height = d_height;
scale_srcW = width;
scale_srcH = height;
SwScale_Init();
}
else {
image_height = height;
image_width = width;
}
image_format = format;
//printf("Verbose level is %i\n", verbose);
switch(format) {
case IMGFMT_BGR32:
bpp = 24;
cspace = BGR;
image_data = malloc(image_width*image_height*3);
break;
case IMGFMT_BGR24:
bpp = 24;
cspace = BGR;
break;
case IMGFMT_RGB24:
bpp = 24;
cspace = RGB;
break;
case IMGFMT_IYUV:
case IMGFMT_I420:
case IMGFMT_YV12:
bpp = 24;
cspace = BGR;
yuv2rgb_init(bpp,MODE_RGB);
image_data = malloc(image_width*image_height*3);
break;
default:
return 1;
}
if((z_compression >= 0) && (z_compression <= 9)) {
if(z_compression == 0) {
printf("PNG Warning: compression level set to 0, compression disabled!\n");
printf("PNG Info: Use the -z <n> switch to set compression level from 0 to 9.\n");
printf("PNG Info: (0 = no compression, 1 = fastest, lowest - 9 best, slowest compression)\n");
}
}
else {
printf("PNG Warning: compression level out of range setting to 1!\n");
printf("PNG Info: Use the -z <n> switch to set compression level from 0 to 9.\n");
printf("PNG Info: (0 = no compression, 1 = fastest, lowest - 9 best, slowest compression)\n");
z_compression = Z_BEST_SPEED;
}
if(verbose) printf("PNG Compression level %i\n", z_compression);
return 0;
}
static const vo_info_t*
get_info(void)
{
return &vo_info;
}
struct pngdata create_png (char * fname)
{
struct pngdata png;
/*png_structp png_ptr = png_create_write_struct
(PNG_LIBPNG_VER_STRING, (png_voidp)user_error_ptr,
user_error_fn, user_warning_fn);*/
//png_byte *row_pointers[image_height];
png.png_ptr = png_create_write_struct
(PNG_LIBPNG_VER_STRING, NULL,
NULL, NULL);
png.info_ptr = png_create_info_struct(png.png_ptr);
if (!png.png_ptr) {
if(verbose > 1) printf("PNG Failed to init png pointer\n");
png.status = ERROR;
return png;
}
if (!png.info_ptr) {
if(verbose > 1) printf("PNG Failed to init png infopointer\n");
png_destroy_write_struct(&png.png_ptr,
(png_infopp)NULL);
png.status = ERROR;
return png;
}
if (setjmp(png.png_ptr->jmpbuf)) {
if(verbose > 1) printf("PNG Internal error!\n");
png_destroy_write_struct(&png.png_ptr, &png.info_ptr);
fclose(png.fp);
png.status = ERROR;
return png;
}
png.fp = fopen (fname, "wb");
if (png.fp == NULL) {
printf("\nPNG Error opening %s for writing!\n", strerror(errno));
png.status = ERROR;
return png;
}
if(verbose > 1) printf("PNG Init IO\n");
png_init_io(png.png_ptr, png.fp);
/* set the zlib compression level */
png_set_compression_level(png.png_ptr, z_compression);
/*png_set_IHDR(png_ptr, info_ptr, width, height,
bit_depth, color_type, interlace_type,
compression_type, filter_type)*/
png_set_IHDR(png.png_ptr, png.info_ptr, image_width, image_height,
8, PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
if(verbose > 1) printf("PNG Write Info\n");
png_write_info(png.png_ptr, png.info_ptr);
if(cspace) {
if(verbose > 1) printf("PNG Set BGR Conversion\n");
png_set_bgr(png.png_ptr);
}
png.status = OK;
return png;
}
static uint8_t destroy_png(struct pngdata png) {
if(verbose > 1) printf("PNG Write End\n");
png_write_end(png.png_ptr, png.info_ptr);
if(verbose > 1) printf("PNG Destroy Write Struct\n");
png_destroy_write_struct(&png.png_ptr, &png.info_ptr);
fclose (png.fp);
return 0;
}
static uint32_t draw_frame(uint8_t * src[])
{
char buf[100];
int k, bppmul = bpp/8;
struct pngdata png;
png_byte *row_pointers[image_height];
snprintf (buf, 100, "%08d.png", ++framenum);
if (image_format == IMGFMT_BGR32)
{
rgb32to24(src[0], image_data, image_width * image_height * 4);
src[0] = image_data;
}
png = create_png(buf);
if(png.status){
printf("PNG Error in create_png\n");
return 1;
}
if(verbose > 1) printf("PNG Creating Row Pointers\n");
for ( k = 0; k < image_height; k++ ) row_pointers[k] = &src[0][image_width*k*bppmul];
//png_write_flush(png.png_ptr);
//png_set_flush(png.png_ptr, nrows);
if(verbose > 1) printf("PNG Writing Image Data\n");
png_write_image(png.png_ptr, row_pointers);
return destroy_png(png);
}
static void draw_osd(void)
{
vo_draw_text(image_width, image_height, draw_alpha);
}
static void flip_page (void)
{
char buf[100];
int k, bppmul = bpp/8;
struct pngdata png;
png_byte *row_pointers[image_height];
if((image_format == IMGFMT_YV12) || (image_format == IMGFMT_IYUV) || (image_format == IMGFMT_I420)) {
snprintf (buf, 100, "%08d.png", ++framenum);
png = create_png(buf);
if(png.status){
printf("PNG Error in create_png\n");
}
if(verbose > 1) printf("PNG Creating Row Pointers\n");
for ( k = 0; k < image_height; k++ ) row_pointers[k] = &image_data[image_width*k*bppmul];
//png_write_flush(png.png_ptr);
//png_set_flush(png.png_ptr, nrows);
if(verbose > 1) printf("PNG Writing Image Data\n");
png_write_image(png.png_ptr, row_pointers);
destroy_png(png);
}
}
static uint32_t draw_slice( uint8_t *src[],int stride[],int w,int h,int x,int y )
{
/* hack: swap planes for I420 ;) -- alex */
if ((image_format == IMGFMT_IYUV) || (image_format == IMGFMT_I420))
{
uint8_t *src_i420[3];
src_i420[0] = src[0];
src_i420[1] = src[2];
src_i420[2] = src[1];
src = src_i420;
}
if (scale_srcW) {
uint8_t *dst[3] = {image_data, NULL, NULL};
SwScale_YV12slice(src,stride,y,h,
dst, image_width*((bpp+7)/8), bpp,
scale_srcW, scale_srcH, image_width, image_height);
}
else {
uint8_t *dst = image_data + (image_width * y + x) * (bpp/8);
yuv2rgb(dst,src[0],src[1],src[2],w,h,image_width*(bpp/8),stride[0],stride[1]);
}
return 0;
}
static uint32_t
query_format(uint32_t format)
{
switch(format){
case IMGFMT_IYUV:
case IMGFMT_I420:
case IMGFMT_YV12:
case IMGFMT_RGB|24:
case IMGFMT_BGR|24:
case IMGFMT_BGR|32:
return 1;
}
return 0;
}
static void
uninit(void)
{
if(image_data){ free(image_data);image_data=NULL;}
}
static void check_events(void)
{
}
static uint32_t preinit(const char *arg)
{
if(arg)
{
printf("PNG Unknown subdevice: %s\n",arg);
return ENOSYS;
}
return 0;
}
static uint32_t control(uint32_t request, void *data, ...)
{
switch (request) {
case VOCTRL_QUERY_FORMAT:
return query_format(*((uint32_t*)data));
}
return VO_NOTIMPL;
}
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