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mpv/libvo/vo_png.c

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/*
* Portable Network Graphics renderer
*
* Copyright 2001 by Felix Buenemann <atmosfear@users.sourceforge.net>
*
* Uses libpng (which uses zlib), so see according licenses.
*
* This file is part of MPlayer.
*
* MPlayer 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.
*
* MPlayer 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 MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <png.h>
#include "config.h"
#include "mp_msg.h"
#include "mp_msg.h"
#include "help_mp.h"
#include "video_out.h"
#include "video_out_internal.h"
#include "subopt-helper.h"
#include "mplayer.h"
#define BUFLENGTH 512
static const vo_info_t info =
{
"PNG file",
"png",
"Felix Buenemann <atmosfear@users.sourceforge.net>",
""
};
const LIBVO_EXTERN (png)
static int z_compression = Z_NO_COMPRESSION;
static char *png_outdir = NULL;
static int framenum = 0;
static int use_alpha;
struct pngdata {
FILE * fp;
png_structp png_ptr;
png_infop info_ptr;
enum {OK,ERROR} status;
};
static void png_mkdir(char *buf, int verbose) {
struct stat stat_p;
#ifndef __MINGW32__
if ( mkdir(buf, 0755) < 0 ) {
#else
if ( mkdir(buf) < 0 ) {
#endif
switch (errno) { /* use switch in case other errors need to be caught
and handled in the future */
case EEXIST:
if ( stat(buf, &stat_p ) < 0 ) {
mp_msg(MSGT_VO, MSGL_ERR, "%s: %s: %s\n", info.short_name,
MSGTR_VO_GenericError, strerror(errno) );
mp_msg(MSGT_VO, MSGL_ERR, "%s: %s %s\n", info.short_name,
MSGTR_VO_UnableToAccess,buf);
exit_player(MSGTR_Exit_error);
}
if ( !S_ISDIR(stat_p.st_mode) ) {
mp_msg(MSGT_VO, MSGL_ERR, "%s: %s %s\n", info.short_name,
buf, MSGTR_VO_ExistsButNoDirectory);
exit_player(MSGTR_Exit_error);
}
if ( !(stat_p.st_mode & S_IWUSR) ) {
mp_msg(MSGT_VO, MSGL_ERR, "%s: %s - %s\n", info.short_name,
buf, MSGTR_VO_DirExistsButNotWritable);
exit_player(MSGTR_Exit_error);
}
mp_msg(MSGT_VO, MSGL_INFO, "%s: %s - %s\n", info.short_name,
buf, MSGTR_VO_DirExistsAndIsWritable);
break;
default:
mp_msg(MSGT_VO, MSGL_ERR, "%s: %s: %s\n", info.short_name,
MSGTR_VO_GenericError, strerror(errno) );
mp_msg(MSGT_VO, MSGL_ERR, "%s: %s - %s\n", info.short_name,
buf, MSGTR_VO_CantCreateDirectory);
exit_player(MSGTR_Exit_error);
} /* end switch */
} else if ( verbose ) {
mp_msg(MSGT_VO, MSGL_INFO, "%s: %s - %s\n", info.short_name,
buf, MSGTR_VO_DirectoryCreateSuccess);
} /* end if */
}
static int
config(uint32_t width, uint32_t height, uint32_t d_width, uint32_t d_height, uint32_t flags, char *title, uint32_t format)
{
char buf[BUFLENGTH];
if(z_compression == 0) {
mp_msg(MSGT_VO,MSGL_INFO, MSGTR_LIBVO_PNG_Warning1);
mp_msg(MSGT_VO,MSGL_INFO, MSGTR_LIBVO_PNG_Warning2);
mp_msg(MSGT_VO,MSGL_INFO, MSGTR_LIBVO_PNG_Warning3);
}
snprintf(buf, BUFLENGTH, "%s", png_outdir);
png_mkdir(buf, 1);
mp_msg(MSGT_VO,MSGL_DBG2, "PNG Compression level %i\n", z_compression);
return 0;
}
static struct pngdata create_png (char * fname, int image_width, int image_height, int swapped)
{
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) {
mp_msg(MSGT_VO,MSGL_DBG2, "PNG Failed to init png pointer\n");
png.status = ERROR;
return png;
}
if (!png.info_ptr) {
mp_msg(MSGT_VO,MSGL_DBG2, "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)) {
mp_msg(MSGT_VO,MSGL_DBG2, "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) {
mp_msg(MSGT_VO,MSGL_WARN, MSGTR_LIBVO_PNG_ErrorOpeningForWriting, strerror(errno));
png.status = ERROR;
return png;
}
mp_msg(MSGT_VO,MSGL_DBG2, "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, use_alpha ? PNG_COLOR_TYPE_RGBA : PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
mp_msg(MSGT_VO,MSGL_DBG2, "PNG Write Info\n");
png_write_info(png.png_ptr, png.info_ptr);
if(swapped) {
mp_msg(MSGT_VO,MSGL_DBG2, "PNG Set BGR Conversion\n");
png_set_bgr(png.png_ptr);
}
png.status = OK;
return png;
}
static uint8_t destroy_png(struct pngdata png) {
mp_msg(MSGT_VO,MSGL_DBG2, "PNG Write End\n");
png_write_end(png.png_ptr, png.info_ptr);
mp_msg(MSGT_VO,MSGL_DBG2, "PNG Destroy Write Struct\n");
png_destroy_write_struct(&png.png_ptr, &png.info_ptr);
fclose (png.fp);
return 0;
}
static uint32_t draw_image(mp_image_t* mpi){
char buf[100];
int k;
struct pngdata png;
png_byte *row_pointers[mpi->h];
// if -dr or -slices then do nothing:
if(mpi->flags&(MP_IMGFLAG_DIRECT|MP_IMGFLAG_DRAW_CALLBACK)) return VO_TRUE;
snprintf (buf, 100, "%s/%08d.png", png_outdir, ++framenum);
png = create_png(buf, mpi->w, mpi->h, IMGFMT_IS_BGR(mpi->imgfmt));
if(png.status){
mp_msg(MSGT_VO,MSGL_WARN, MSGTR_LIBVO_PNG_ErrorInCreatePng);
return 1;
}
mp_msg(MSGT_VO,MSGL_DBG2, "PNG Creating Row Pointers\n");
for ( k = 0; k < mpi->h; k++ )
row_pointers[k] = mpi->planes[0]+mpi->stride[0]*k;
//png_write_flush(png.png_ptr);
//png_set_flush(png.png_ptr, nrows);
if( mp_msg_test(MSGT_VO,MSGL_DBG2) ) {
mp_msg(MSGT_VO,MSGL_DBG2, "PNG Writing Image Data\n"); }
png_write_image(png.png_ptr, row_pointers);
destroy_png(png);
return VO_TRUE;
}
static void draw_osd(void){}
static void flip_page (void){}
static int draw_frame(uint8_t * src[])
{
return -1;
}
static int draw_slice( uint8_t *src[],int stride[],int w,int h,int x,int y )
{
return -1;
}
static int
query_format(uint32_t format)
{
const int supported_flags = VFCAP_CSP_SUPPORTED|VFCAP_CSP_SUPPORTED_BY_HW|VFCAP_ACCEPT_STRIDE;
switch(format){
case IMGFMT_RGB24:
case IMGFMT_BGR24:
return use_alpha ? 0 : supported_flags;
case IMGFMT_RGBA:
case IMGFMT_BGRA:
return use_alpha ? supported_flags : 0;
}
return 0;
}
static void uninit(void){
if (png_outdir) {
free(png_outdir);
png_outdir = NULL;
}
}
static void check_events(void){}
static int int_zero_to_nine(int *sh)
{
if ( (*sh < 0) || (*sh > 9) )
return 0;
return 1;
}
static opt_t subopts[] = {
{"alpha", OPT_ARG_BOOL, &use_alpha, NULL, 0},
{"z", OPT_ARG_INT, &z_compression, (opt_test_f)int_zero_to_nine},
{"outdir", OPT_ARG_MSTRZ, &png_outdir, NULL, 0},
{NULL}
};
static int preinit(const char *arg)
{
z_compression = 0;
png_outdir = strdup(".");
use_alpha = 0;
if (subopt_parse(arg, subopts) != 0) {
return -1;
}
return 0;
}
static int control(uint32_t request, void *data, ...)
{
switch (request) {
case VOCTRL_DRAW_IMAGE:
return draw_image(data);
case VOCTRL_QUERY_FORMAT:
return query_format(*((uint32_t*)data));
}
return VO_NOTIMPL;
}
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