diff options
Diffstat (limited to 'libavfilter/libmpcodecs/vf_screenshot.c')
-rw-r--r-- | libavfilter/libmpcodecs/vf_screenshot.c | 322 |
1 files changed, 322 insertions, 0 deletions
diff --git a/libavfilter/libmpcodecs/vf_screenshot.c b/libavfilter/libmpcodecs/vf_screenshot.c new file mode 100644 index 0000000..82b345b --- /dev/null +++ b/libavfilter/libmpcodecs/vf_screenshot.c @@ -0,0 +1,322 @@ +/* + * 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 "config.h" + +#include <stdio.h> +#include <stdlib.h> +#if HAVE_MALLOC_H +#include <malloc.h> +#endif +#include <string.h> +#include <inttypes.h> + +#include <sys/types.h> +#include <sys/stat.h> +#include <unistd.h> + +#include "mp_msg.h" + +#include "img_format.h" +#include "mp_image.h" +#include "vf.h" +#include "vf_scale.h" + +#include "libswscale/swscale.h" +#include "libavcodec/avcodec.h" + +struct vf_priv_s { + int frameno; + char fname[102]; + /// shot stores current screenshot mode: + /// 0: don't take screenshots + /// 1: take single screenshot, reset to 0 afterwards + /// 2: take screenshots of each frame + int shot, store_slices; + int dw, dh, stride; + uint8_t *buffer; + struct SwsContext *ctx; + AVCodecContext *avctx; + uint8_t *outbuffer; + int outbuffer_size; +}; + +//===========================================================================// + +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->ctx=sws_getContextFromCmdLine(width, height, outfmt, + d_width, d_height, IMGFMT_RGB24); + + vf->priv->outbuffer_size = d_width * d_height * 3 * 2; + vf->priv->outbuffer = realloc(vf->priv->outbuffer, vf->priv->outbuffer_size); + vf->priv->avctx->width = d_width; + vf->priv->avctx->height = d_height; + vf->priv->avctx->pix_fmt = PIX_FMT_RGB24; + vf->priv->avctx->compression_level = 0; + vf->priv->dw = d_width; + vf->priv->dh = d_height; + vf->priv->stride = (3*vf->priv->dw+15)&~15; + + free(vf->priv->buffer); // probably reconfigured + vf->priv->buffer = NULL; + + return vf_next_config(vf,width,height,d_width,d_height,flags,outfmt); +} + +static void write_png(struct vf_priv_s *priv) +{ + char *fname = priv->fname; + FILE * fp; + AVFrame pic; + int size; + + fp = fopen (fname, "wb"); + if (fp == NULL) { + mp_msg(MSGT_VFILTER,MSGL_ERR,"\nPNG Error opening %s for writing!\n", fname); + return; + } + + pic.data[0] = priv->buffer; + pic.linesize[0] = priv->stride; + size = avcodec_encode_video(priv->avctx, priv->outbuffer, priv->outbuffer_size, &pic); + if (size > 0) + fwrite(priv->outbuffer, size, 1, fp); + + fclose (fp); +} + +static int fexists(char *fname) +{ + struct stat dummy; + if (stat(fname, &dummy) == 0) return 1; + else return 0; +} + +static void gen_fname(struct vf_priv_s* priv) +{ + do { + snprintf (priv->fname, 100, "shot%04d.png", ++priv->frameno); + } while (fexists(priv->fname) && priv->frameno < 100000); + if (fexists(priv->fname)) { + priv->fname[0] = '\0'; + return; + } + + mp_msg(MSGT_VFILTER,MSGL_INFO,"*** screenshot '%s' ***\n",priv->fname); + +} + +static void scale_image(struct vf_priv_s* priv, mp_image_t *mpi) +{ + uint8_t *dst[MP_MAX_PLANES] = {NULL}; + int dst_stride[MP_MAX_PLANES] = {0}; + + dst_stride[0] = priv->stride; + if (!priv->buffer) + priv->buffer = av_malloc(dst_stride[0]*priv->dh); + + dst[0] = priv->buffer; + sws_scale(priv->ctx, mpi->planes, mpi->stride, 0, priv->dh, dst, dst_stride); +} + +static void start_slice(struct vf_instance *vf, mp_image_t *mpi) +{ + vf->dmpi=vf_get_image(vf->next,mpi->imgfmt, + mpi->type, mpi->flags, mpi->width, mpi->height); + if (vf->priv->shot) { + vf->priv->store_slices = 1; + if (!vf->priv->buffer) + vf->priv->buffer = av_malloc(vf->priv->stride*vf->priv->dh); + } + +} + +static void draw_slice(struct vf_instance *vf, unsigned char** src, + int* stride, int w,int h, int x, int y) +{ + if (vf->priv->store_slices) { + uint8_t *dst[MP_MAX_PLANES] = {NULL}; + int dst_stride[MP_MAX_PLANES] = {0}; + dst_stride[0] = vf->priv->stride; + dst[0] = vf->priv->buffer; + sws_scale(vf->priv->ctx, src, stride, y, h, dst, dst_stride); + } + vf_next_draw_slice(vf,src,stride,w,h,x,y); +} + +static void get_image(struct vf_instance *vf, mp_image_t *mpi) +{ + // FIXME: should vf.c really call get_image when using slices?? + if (mpi->flags & MP_IMGFLAG_DRAW_CALLBACK) + return; + vf->dmpi= vf_get_image(vf->next, mpi->imgfmt, + mpi->type, mpi->flags/* | MP_IMGFLAG_READABLE*/, mpi->width, mpi->height); + + mpi->planes[0]=vf->dmpi->planes[0]; + mpi->stride[0]=vf->dmpi->stride[0]; + if(mpi->flags&MP_IMGFLAG_PLANAR){ + mpi->planes[1]=vf->dmpi->planes[1]; + mpi->planes[2]=vf->dmpi->planes[2]; + mpi->stride[1]=vf->dmpi->stride[1]; + mpi->stride[2]=vf->dmpi->stride[2]; + } + mpi->width=vf->dmpi->width; + + mpi->flags|=MP_IMGFLAG_DIRECT; + + mpi->priv=(void*)vf->dmpi; +} + +static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts) +{ + mp_image_t *dmpi = (mp_image_t *)mpi->priv; + + if (mpi->flags & MP_IMGFLAG_DRAW_CALLBACK) + dmpi = vf->dmpi; + else + if(!(mpi->flags&MP_IMGFLAG_DIRECT)){ + dmpi=vf_get_image(vf->next,mpi->imgfmt, + MP_IMGTYPE_EXPORT, 0, + mpi->width, mpi->height); + vf_clone_mpi_attributes(dmpi, mpi); + dmpi->planes[0]=mpi->planes[0]; + dmpi->planes[1]=mpi->planes[1]; + dmpi->planes[2]=mpi->planes[2]; + dmpi->stride[0]=mpi->stride[0]; + dmpi->stride[1]=mpi->stride[1]; + dmpi->stride[2]=mpi->stride[2]; + dmpi->width=mpi->width; + dmpi->height=mpi->height; + } + + if(vf->priv->shot) { + if (vf->priv->shot==1) + vf->priv->shot=0; + gen_fname(vf->priv); + if (vf->priv->fname[0]) { + if (!vf->priv->store_slices) + scale_image(vf->priv, dmpi); + write_png(vf->priv); + } + vf->priv->store_slices = 0; + } + + return vf_next_put_image(vf, dmpi, pts); +} + +static int control (vf_instance_t *vf, int request, void *data) +{ + /** data contains an integer argument + * 0: take screenshot with the next frame + * 1: take screenshots with each frame until the same command is given once again + **/ + if(request==VFCTRL_SCREENSHOT) { + if (data && *(int*)data) { // repeated screenshot mode + if (vf->priv->shot==2) + vf->priv->shot=0; + else + vf->priv->shot=2; + } else { // single screenshot + if (!vf->priv->shot) + vf->priv->shot=1; + } + return CONTROL_TRUE; + } + return vf_next_control (vf, request, data); +} + + +//===========================================================================// + +static int query_format(struct vf_instance *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_BGR12: + 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 void uninit(vf_instance_t *vf) +{ + avcodec_close(vf->priv->avctx); + av_freep(&vf->priv->avctx); + if(vf->priv->ctx) sws_freeContext(vf->priv->ctx); + av_free(vf->priv->buffer); + free(vf->priv->outbuffer); + free(vf->priv); +} + +static int vf_open(vf_instance_t *vf, char *args) +{ + vf->config=config; + vf->control=control; + vf->put_image=put_image; + vf->query_format=query_format; + vf->start_slice=start_slice; + vf->draw_slice=draw_slice; + vf->get_image=get_image; + vf->uninit=uninit; + vf->priv=malloc(sizeof(struct vf_priv_s)); + vf->priv->frameno=0; + vf->priv->shot=0; + vf->priv->store_slices=0; + vf->priv->buffer=0; + vf->priv->outbuffer=0; + vf->priv->ctx=0; + vf->priv->avctx = avcodec_alloc_context(); + avcodec_register_all(); + if (avcodec_open(vf->priv->avctx, avcodec_find_encoder(CODEC_ID_PNG))) { + mp_msg(MSGT_VFILTER, MSGL_FATAL, "Could not open libavcodec PNG encoder\n"); + return 0; + } + return 1; +} + + +const vf_info_t vf_info_screenshot = { + "screenshot to file", + "screenshot", + "A'rpi, Jindrich Makovicka", + "", + vf_open, + NULL +}; + +//===========================================================================// |