--- libavdevice/x11grab.c | 41 +++++++++++++++++++++++++++++++---------- 1 files changed, 31 insertions(+), 10 deletions(-)
diff --git a/libavdevice/x11grab.c b/libavdevice/x11grab.c index 0e63d09..cb643d8 100644 --- a/libavdevice/x11grab.c +++ b/libavdevice/x11grab.c @@ -37,6 +37,8 @@ #include "config.h" #include "libavformat/avformat.h" +#include "libavutil/log.h" +#include "libavutil/opt.h" #include <time.h> #include <X11/X.h> #include <X11/Xlib.h> @@ -52,6 +54,7 @@ */ struct x11_grab { + AVClass *class; /**< Class for private options. */ int frame_size; /**< Size in bytes of a grabbed frame */ AVRational time_base; /**< Time base */ int64_t time_frame; /**< Current time */ @@ -100,7 +103,12 @@ x11grab_read_header(AVFormatContext *s1, AVFormatParameters *ap) *offset= 0; } - av_log(s1, AV_LOG_INFO, "device: %s -> display: %s x: %d y: %d width: %d height: %d\n", s1->filename, param, x_off, y_off, ap->width, ap->height); + if (ap->width > 0) + x11grab->width = ap->width; + if (ap->height > 0) + x11grab->height = ap->height; + + av_log(s1, AV_LOG_INFO, "device: %s -> display: %s x: %d y: %d width: %d height: %d\n", s1->filename, param, x_off, y_off, x11grab->width, x11grab->height); dpy = XOpenDisplay(param); if(!dpy) { @@ -108,8 +116,8 @@ x11grab_read_header(AVFormatContext *s1, AVFormatParameters *ap) return AVERROR(EIO); } - if (ap->width <= 0 || ap->height <= 0 || ap->time_base.den <= 0) { - av_log(s1, AV_LOG_ERROR, "AVParameters don't have video size and/or rate. Use -s and -r.\n"); + if ( ap->time_base.den <= 0) { + av_log(s1, AV_LOG_ERROR, "AVParameters don't have video rate. Use -r.\n"); return AVERROR(EIO); } @@ -130,7 +138,7 @@ x11grab_read_header(AVFormatContext *s1, AVFormatParameters *ap) ZPixmap, NULL, &x11grab->shminfo, - ap->width, ap->height); + x11grab->width,x11grab->height); x11grab->shminfo.shmid = shmget(IPC_PRIVATE, image->bytes_per_line * image->height, IPC_CREAT|0777); @@ -149,7 +157,7 @@ x11grab_read_header(AVFormatContext *s1, AVFormatParameters *ap) } else { image = XGetImage(dpy, RootWindow(dpy, DefaultScreen(dpy)), x_off,y_off, - ap->width,ap->height, + x11grab->width, x11grab->height, AllPlanes, ZPixmap); } @@ -213,10 +221,9 @@ x11grab_read_header(AVFormatContext *s1, AVFormatParameters *ap) return -1; } - x11grab->frame_size = ap->width * ap->height * image->bits_per_pixel/8; + + x11grab->frame_size = x11grab->width * x11grab->height * image->bits_per_pixel/8; x11grab->dpy = dpy; - x11grab->width = ap->width; - x11grab->height = ap->height; x11grab->time_base = ap->time_base; x11grab->time_frame = av_gettime() / av_q2d(ap->time_base); x11grab->x_off = x_off; @@ -226,8 +233,8 @@ x11grab_read_header(AVFormatContext *s1, AVFormatParameters *ap) st->codec->codec_type = AVMEDIA_TYPE_VIDEO; st->codec->codec_id = CODEC_ID_RAWVIDEO; - st->codec->width = ap->width; - st->codec->height = ap->height; + st->codec->width = x11grab->width; + st->codec->height = x11grab->height; st->codec->pix_fmt = input_pixfmt; st->codec->time_base = ap->time_base; st->codec->bit_rate = x11grab->frame_size * 1/av_q2d(ap->time_base) * 8; @@ -439,6 +446,19 @@ x11grab_read_close(AVFormatContext *s1) return 0; } +static const AVOption options[] = { + { "width", "", offsetof(struct x11_grab, width), FF_OPT_TYPE_INT, {.dbl = 640}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM }, + { "height", "", offsetof(struct x11_grab, height), FF_OPT_TYPE_INT, {.dbl = 480}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM }, + { NULL }, +}; + +static const AVClass x11_class = { + .class_name = "X11 grab interface", + .item_name = av_default_item_name, + .option = options, + .version = LIBAVUTIL_VERSION_INT, +}; + /** x11 grabber device demuxer declaration */ AVInputFormat ff_x11_grab_device_demuxer = { @@ -450,4 +470,5 @@ AVInputFormat ff_x11_grab_device_demuxer = x11grab_read_packet, x11grab_read_close, .flags = AVFMT_NOFILE, + .priv_class = &x11_class, }; -- 1.7.5.1 _______________________________________________ libav-devel mailing list libav-devel@libav.org https://lists.libav.org/mailman/listinfo/libav-devel