screenshot filter

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@16447 b3059339-0415-0410-9bf9-f77b7e298cf2

3 files changed, 241 insertions, 0 deletions

diff --git a/libmpcodecs/vf.c b/libmpcodecs/vf.c
index 9623efc6c8..7ddc92a926 100644
--- a/libmpcodecs/vf.c
+++ b/libmpcodecs/vf.c
@@ -98,6 +98,7 @@ extern vf_info_t vf_info_phase;
 extern vf_info_t vf_info_divtc;
 extern vf_info_t vf_info_harddup;
 extern vf_info_t vf_info_softskip;
+extern vf_info_t vf_info_screenshot;
 
 // list of available filters:
 static vf_info_t* filter_list[]={
@@ -185,6 +186,9 @@ static vf_info_t* filter_list[]={
     &vf_info_divtc,
     &vf_info_harddup,
     &vf_info_softskip,
+#ifdef HAVE_PNG
+    &vf_info_screenshot,
+#endif
     NULL
 };
 
diff --git a/libmpcodecs/vf.h b/libmpcodecs/vf.h
index 77f80d2897..4df7cc06af 100644
--- a/libmpcodecs/vf.h
+++ b/libmpcodecs/vf.h
@@ -74,6 +74,7 @@ typedef struct vf_seteq_s
 #define VFCTRL_DUPLICATE_FRAME 11 /* For encoding - encode zero-change frame */
 #define VFCTRL_SKIP_NEXT_FRAME 12 /* For encoding - drop the next frame that passes thru */
 #define VFCTRL_FLUSH_FRAMES    13 /* For encoding - flush delayed frames */
+#define VFCTRL_SCREENSHOT      14 /* Make a screenshot */
 
 #include "vfcap.h"
 
diff --git a/libmpcodecs/vf_screenshot.c b/libmpcodecs/vf_screenshot.c
new file mode 100644
index 0000000000..7aa13a0486
--- /dev/null
+++ b/libmpcodecs/vf_screenshot.c
@@ -0,0 +1,236 @@
+#include "../config.h"
+#ifdef HAVE_PNG
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <inttypes.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include <png.h>
+
+#include "../mp_msg.h"
+
+#include "img_format.h"
+#include "mp_image.h"
+#include "vf.h"
+#include "vf_scale.h"
+
+#include "../libvo/fastmemcpy.h"
+#include "../postproc/swscale.h"
+#include "../postproc/rgb2rgb.h"
+
+struct vf_priv_s {
+    int frameno;
+    int shot;
+    int dw, dh;
+    uint8_t *buffer;
+    struct SwsContext *ctx;
+    mp_image_t *dmpi;
+};
+
+//===========================================================================//
+
+static int config(struct vf_instance_s* vf,
+		  int width, int height, int d_width, int d_height,
+		  unsigned int flags, unsigned int outfmt)
+{
+    int int_sws_flags=0;
+    SwsFilter *srcFilter, *dstFilter;
+    
+    sws_getFlagsAndFilterFromCmdLine(&int_sws_flags, &srcFilter, &dstFilter);
+
+    vf->priv->ctx=sws_getContext(width, height, outfmt,
+				 d_width, d_height, IMGFMT_BGR24,
+				 int_sws_flags | get_sws_cpuflags(), srcFilter, dstFilter, NULL);
+
+    vf->priv->dw = d_width;
+    vf->priv->dh = d_height;
+
+    if (vf->priv->buffer) free(vf->priv->buffer); // probably reconfigured
+    vf->priv->dmpi = NULL;
+
+    return vf_next_config(vf,width,height,d_width,d_height,flags,outfmt);
+}
+
+static int write_png(char *fname, unsigned char *buffer, int width, int height, int stride)
+{
+    FILE * fp;
+    png_structp png_ptr;
+    png_infop info_ptr;
+    png_byte **row_pointers;
+    int k;
+
+    png_ptr = png_create_write_struct (PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
+    info_ptr = png_create_info_struct(png_ptr);
+    fp = NULL;
+
+    if (setjmp(png_ptr->jmpbuf)) {
+	png_destroy_write_struct(&png_ptr, &info_ptr);
+	fclose(fp);
+	return 0;
+    }
+
+    fp = fopen (fname, "wb");
+    if (fp == NULL) {
+	mp_msg(MSGT_VFILTER,MSGL_ERR,"\nPNG Error opening %s for writing!\n", fname);
+	return 0;
+    }
+        
+    png_init_io(png_ptr, fp);
+    png_set_compression_level(png_ptr, 0);
+
+    png_set_IHDR(png_ptr, info_ptr, width, height,
+		 8, PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE,
+		 PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
+
+    png_write_info(png_ptr, info_ptr);
+        
+    png_set_bgr(png_ptr);
+
+    row_pointers = (png_byte**)malloc(height*sizeof(png_byte*));
+    for ( k = 0; k <height; k++ ){
+	unsigned char* s=buffer + stride*k;
+	row_pointers[k] = s;
+    }
+
+    png_write_image(png_ptr, row_pointers);
+    png_write_end(png_ptr, info_ptr);
+    png_destroy_write_struct(&png_ptr, &info_ptr);
+
+    free(row_pointers);
+
+    fclose (fp);
+}
+
+static int fexists(char *fname)
+{
+    struct stat dummy;
+    if (stat(fname, &dummy) == 0) return 1;
+    else return 0;
+}
+
+static void shot(struct vf_priv_s* priv)
+{
+    char fname[102];
+    uint8_t *dst[3];
+    int dst_stride[3];
+	
+    priv->shot=0;
+
+    do {
+	snprintf (fname, 100, "shot%04d.png", ++priv->frameno);
+    } while (fexists(fname) && priv->frameno < 100000);
+    if (fexists(fname)) return;
+
+    mp_msg(MSGT_VFILTER,MSGL_INFO,"*** screenshot '%s' ***\n",fname);
+
+    dst_stride[0] = (3*priv->dw+15)&~15;
+    dst_stride[1] = dst_stride[2] = 0;
+    if (!priv->buffer)
+	priv->buffer = (uint8_t*)memalign(16, dst_stride[0]*priv->dh);
+
+    dst[0] = priv->buffer;
+    dst[1] = dst[2] = 0;
+    sws_scale_ordered(priv->ctx, priv->dmpi->planes, priv->dmpi->stride, 0, priv->dmpi->height, dst, dst_stride);
+
+    write_png(fname, priv->buffer, priv->dw, priv->dh, dst_stride[0]);
+}
+
+static int put_image(struct vf_instance_s* vf, mp_image_t *mpi)
+{
+    vf->priv->dmpi=vf_get_image(vf->next,mpi->imgfmt,
+				MP_IMGTYPE_EXPORT, 0,
+				mpi->w, mpi->h);
+
+    vf->priv->dmpi->planes[0]=mpi->planes[0];
+    vf->priv->dmpi->planes[1]=mpi->planes[1];
+    vf->priv->dmpi->planes[2]=mpi->planes[2];
+    vf->priv->dmpi->stride[0]=mpi->stride[0];
+    vf->priv->dmpi->stride[1]=mpi->stride[1];
+    vf->priv->dmpi->stride[2]=mpi->stride[2];
+    vf->priv->dmpi->width=mpi->width;
+    vf->priv->dmpi->height=mpi->height;
+
+    if(vf->priv->shot) {
+	shot(vf->priv);
+    }
+
+    return vf_next_put_image(vf, vf->priv->dmpi);
+}
+
+int control (vf_instance_t *vf, int request, void *data)
+{
+    if(request==VFCTRL_SCREENSHOT) {
+	vf->priv->shot=1;
+        return CONTROL_TRUE;
+    }
+    return vf_next_control (vf, request, data);
+}
+
+
+//===========================================================================//
+
+static int query_format(struct vf_instance_s* vf, unsigned int fmt)
+{
+    switch(fmt){
+    case IMGFMT_YV12:
+    case IMGFMT_I420:
+    case IMGFMT_IYUV:
+    case IMGFMT_UYVY:
+    case IMGFMT_YUY2:
+    case IMGFMT_BGR32:
+    case IMGFMT_BGR24:
+    case IMGFMT_BGR16:
+    case IMGFMT_BGR15:
+    case IMGFMT_RGB32:
+    case IMGFMT_RGB24:
+    case IMGFMT_Y800: 
+    case IMGFMT_Y8: 
+    case IMGFMT_YVU9: 
+    case IMGFMT_IF09: 
+    case IMGFMT_444P: 
+    case IMGFMT_422P: 
+    case IMGFMT_411P: 
+	return vf_next_query_format(vf, fmt);
+    }
+    return 0;
+}
+
+static int open(vf_instance_t *vf, char* args)
+{
+    vf->config=config;
+    vf->control=control;
+    vf->put_image=put_image;
+    vf->query_format=query_format;
+    vf->priv=malloc(sizeof(struct vf_priv_s));
+    vf->priv->frameno=0;
+    vf->priv->shot=0;
+    vf->priv->buffer=0;
+    vf->priv->ctx=0;
+    return 1;
+}
+
+static void uninit(vf_instance_t *vf)
+{
+    if(vf->priv->ctx) sws_freeContext(vf->priv->ctx);
+    if (vf->priv->buffer) free(vf->priv->buffer);
+    free(vf->priv);
+}
+
+
+vf_info_t vf_info_screenshot = {
+    "screenshot to file",
+    "screenshot",
+    "A'rpi, Jindrich Makovicka",
+    "",
+    open,
+    NULL
+};
+
+//===========================================================================//
+
+#endif /* HAVE_PNG */