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/* |
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* Copyright (c) 2013 Jeff Moguillansky |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/** |
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* @file |
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* XVideo output device |
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* |
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* TODO: |
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* - add support to more formats |
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*/ |
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#include <X11/Xlib.h> |
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#include <X11/extensions/Xv.h> |
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#include <X11/extensions/XShm.h> |
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#include <X11/extensions/Xvlib.h> |
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#include <sys/shm.h> |
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#include "libavutil/opt.h" |
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#include "libavutil/pixdesc.h" |
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#include "libavutil/imgutils.h" |
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#include "libavformat/internal.h" |
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#include "avdevice.h" |
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typedef struct { |
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AVClass *class; |
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GC gc; |
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Window window; |
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int64_t window_id; |
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char *window_title; |
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int window_width, window_height; |
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int window_x, window_y; |
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int dest_x, dest_y; /**< display area position */ |
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unsigned int dest_w, dest_h; /**< display area dimensions */ |
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Display* display; |
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char *display_name; |
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XvImage* yuv_image; |
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enum AVPixelFormat image_format; |
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int image_width, image_height; |
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XShmSegmentInfo yuv_shminfo; |
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int xv_port; |
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Atom wm_delete_message; |
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} XVContext; |
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typedef struct XVTagFormatMap |
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{ |
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int tag; |
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enum AVPixelFormat format; |
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} XVTagFormatMap; |
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static const XVTagFormatMap tag_codec_map[] = { |
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{ MKTAG('I','4','2','0'), AV_PIX_FMT_YUV420P }, |
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{ MKTAG('U','Y','V','Y'), AV_PIX_FMT_UYVY422 }, |
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{ MKTAG('Y','U','Y','2'), AV_PIX_FMT_YUYV422 }, |
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{ 0, AV_PIX_FMT_NONE } |
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}; |
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static int xv_get_tag_from_format(enum AVPixelFormat format) |
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{ |
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const XVTagFormatMap *m = tag_codec_map; |
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int i; |
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for (i = 0; m->tag; m = &tag_codec_map[++i]) { |
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if (m->format == format) |
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return m->tag; |
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} |
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return 0; |
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} |
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static int xv_write_trailer(AVFormatContext *s) |
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{ |
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XVContext *xv = s->priv_data; |
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if (xv->display) { |
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XShmDetach(xv->display, &xv->yuv_shminfo); |
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if (xv->yuv_image) |
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shmdt(xv->yuv_image->data); |
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XFree(xv->yuv_image); |
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if (xv->gc) |
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XFreeGC(xv->display, xv->gc); |
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XCloseDisplay(xv->display); |
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} |
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return 0; |
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} |
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static int xv_write_header(AVFormatContext *s) |
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{ |
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XVContext *xv = s->priv_data; |
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unsigned int num_adaptors; |
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XvAdaptorInfo *ai; |
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XvImageFormatValues *fv; |
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XColor fgcolor; |
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XWindowAttributes window_attrs; |
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int num_formats = 0, j, tag, ret; |
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AVCodecParameters *par = s->streams[0]->codecpar; |
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if ( s->nb_streams > 1 |
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|| par->codec_type != AVMEDIA_TYPE_VIDEO |
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|| (par->codec_id != AV_CODEC_ID_WRAPPED_AVFRAME && par->codec_id != AV_CODEC_ID_RAWVIDEO)) { |
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av_log(s, AV_LOG_ERROR, "Only a single raw or wrapped avframe video stream is supported.\n"); |
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return AVERROR(EINVAL); |
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} |
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if (!(tag = xv_get_tag_from_format(par->format))) { |
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av_log(s, AV_LOG_ERROR, |
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"Unsupported pixel format '%s', only yuv420p, uyvy422, yuyv422 are currently supported\n", |
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av_get_pix_fmt_name(par->format)); |
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return AVERROR_PATCHWELCOME; |
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} |
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xv->image_format = par->format; |
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xv->display = XOpenDisplay(xv->display_name); |
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if (!xv->display) { |
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av_log(s, AV_LOG_ERROR, "Could not open the X11 display '%s'\n", xv->display_name); |
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return AVERROR(EINVAL); |
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} |
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xv->image_width = par->width; |
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xv->image_height = par->height; |
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if (!xv->window_width && !xv->window_height) { |
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AVRational sar = par->sample_aspect_ratio; |
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xv->window_width = par->width; |
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xv->window_height = par->height; |
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if (sar.num) { |
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if (sar.num > sar.den) |
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xv->window_width = av_rescale(xv->window_width, sar.num, sar.den); |
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if (sar.num < sar.den) |
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xv->window_height = av_rescale(xv->window_height, sar.den, sar.num); |
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} |
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} |
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if (!xv->window_id) { |
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xv->window = XCreateSimpleWindow(xv->display, DefaultRootWindow(xv->display), |
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xv->window_x, xv->window_y, |
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xv->window_width, xv->window_height, |
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0, 0, 0); |
153 |
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if (!xv->window_title) { |
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if (!(xv->window_title = av_strdup(s->url))) { |
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ret = AVERROR(ENOMEM); |
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goto fail; |
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} |
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} |
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XStoreName(xv->display, xv->window, xv->window_title); |
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xv->wm_delete_message = XInternAtom(xv->display, "WM_DELETE_WINDOW", False); |
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XSetWMProtocols(xv->display, xv->window, &xv->wm_delete_message, 1); |
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XMapWindow(xv->display, xv->window); |
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} else |
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xv->window = xv->window_id; |
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if (XvQueryAdaptors(xv->display, DefaultRootWindow(xv->display), &num_adaptors, &ai) != Success) { |
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ret = AVERROR_EXTERNAL; |
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goto fail; |
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} |
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if (!num_adaptors) { |
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av_log(s, AV_LOG_ERROR, "No X-Video adaptors present\n"); |
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return AVERROR(ENODEV); |
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} |
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xv->xv_port = ai[0].base_id; |
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XvFreeAdaptorInfo(ai); |
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fv = XvListImageFormats(xv->display, xv->xv_port, &num_formats); |
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if (!fv) { |
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ret = AVERROR_EXTERNAL; |
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goto fail; |
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} |
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for (j = 0; j < num_formats; j++) { |
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if (fv[j].id == tag) { |
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break; |
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} |
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} |
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XFree(fv); |
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if (j >= num_formats) { |
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av_log(s, AV_LOG_ERROR, |
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"Device does not support pixel format %s, aborting\n", |
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av_get_pix_fmt_name(par->format)); |
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ret = AVERROR(EINVAL); |
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goto fail; |
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} |
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xv->gc = XCreateGC(xv->display, xv->window, 0, 0); |
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xv->image_width = par->width; |
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xv->image_height = par->height; |
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xv->yuv_image = XvShmCreateImage(xv->display, xv->xv_port, tag, 0, |
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xv->image_width, xv->image_height, &xv->yuv_shminfo); |
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xv->yuv_shminfo.shmid = shmget(IPC_PRIVATE, xv->yuv_image->data_size, |
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IPC_CREAT | 0777); |
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xv->yuv_shminfo.shmaddr = (char *)shmat(xv->yuv_shminfo.shmid, 0, 0); |
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xv->yuv_image->data = xv->yuv_shminfo.shmaddr; |
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xv->yuv_shminfo.readOnly = False; |
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XShmAttach(xv->display, &xv->yuv_shminfo); |
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XSync(xv->display, False); |
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shmctl(xv->yuv_shminfo.shmid, IPC_RMID, 0); |
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XGetWindowAttributes(xv->display, xv->window, &window_attrs); |
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fgcolor.red = fgcolor.green = fgcolor.blue = 0; |
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fgcolor.flags = DoRed | DoGreen | DoBlue; |
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XAllocColor(xv->display, window_attrs.colormap, &fgcolor); |
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XSetForeground(xv->display, xv->gc, fgcolor.pixel); |
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//force display area recalculation at first frame |
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xv->window_width = xv->window_height = 0; |
219 |
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220 |
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return 0; |
221 |
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fail: |
222 |
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xv_write_trailer(s); |
223 |
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return ret; |
224 |
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} |
225 |
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226 |
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static void compute_display_area(AVFormatContext *s) |
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{ |
228 |
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XVContext *xv = s->priv_data; |
229 |
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AVRational sar, dar; /* sample and display aspect ratios */ |
230 |
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AVStream *st = s->streams[0]; |
231 |
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AVCodecParameters *par = st->codecpar; |
232 |
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233 |
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/* compute overlay width and height from the codec context information */ |
234 |
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sar = st->sample_aspect_ratio.num ? st->sample_aspect_ratio : (AVRational){ 1, 1 }; |
235 |
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dar = av_mul_q(sar, (AVRational){ par->width, par->height }); |
236 |
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237 |
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/* we suppose the screen has a 1/1 sample aspect ratio */ |
238 |
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/* fit in the window */ |
239 |
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if (av_cmp_q(dar, (AVRational){ xv->dest_w, xv->dest_h }) > 0) { |
240 |
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/* fit in width */ |
241 |
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xv->dest_y = xv->dest_h; |
242 |
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xv->dest_x = 0; |
243 |
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xv->dest_h = av_rescale(xv->dest_w, dar.den, dar.num); |
244 |
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xv->dest_y -= xv->dest_h; |
245 |
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xv->dest_y /= 2; |
246 |
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} else { |
247 |
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/* fit in height */ |
248 |
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xv->dest_x = xv->dest_w; |
249 |
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xv->dest_y = 0; |
250 |
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xv->dest_w = av_rescale(xv->dest_h, dar.num, dar.den); |
251 |
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xv->dest_x -= xv->dest_w; |
252 |
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xv->dest_x /= 2; |
253 |
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} |
254 |
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} |
255 |
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256 |
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static int xv_repaint(AVFormatContext *s) |
257 |
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{ |
258 |
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XVContext *xv = s->priv_data; |
259 |
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XWindowAttributes window_attrs; |
260 |
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261 |
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XGetWindowAttributes(xv->display, xv->window, &window_attrs); |
262 |
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if (window_attrs.width != xv->window_width || window_attrs.height != xv->window_height) { |
263 |
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XRectangle rect[2]; |
264 |
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xv->dest_w = window_attrs.width; |
265 |
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xv->dest_h = window_attrs.height; |
266 |
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compute_display_area(s); |
267 |
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if (xv->dest_x) { |
268 |
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rect[0].width = rect[1].width = xv->dest_x; |
269 |
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rect[0].height = rect[1].height = window_attrs.height; |
270 |
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rect[0].y = rect[1].y = 0; |
271 |
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rect[0].x = 0; |
272 |
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rect[1].x = xv->dest_w + xv->dest_x; |
273 |
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XFillRectangles(xv->display, xv->window, xv->gc, rect, 2); |
274 |
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} |
275 |
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if (xv->dest_y) { |
276 |
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rect[0].width = rect[1].width = window_attrs.width; |
277 |
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rect[0].height = rect[1].height = xv->dest_y; |
278 |
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rect[0].x = rect[1].x = 0; |
279 |
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rect[0].y = 0; |
280 |
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rect[1].y = xv->dest_h + xv->dest_y; |
281 |
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XFillRectangles(xv->display, xv->window, xv->gc, rect, 2); |
282 |
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} |
283 |
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} |
284 |
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285 |
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if (XvShmPutImage(xv->display, xv->xv_port, xv->window, xv->gc, |
286 |
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xv->yuv_image, 0, 0, xv->image_width, xv->image_height, |
287 |
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xv->dest_x, xv->dest_y, xv->dest_w, xv->dest_h, True) != Success) { |
288 |
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av_log(s, AV_LOG_ERROR, "Could not copy image to XV shared memory buffer\n"); |
289 |
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return AVERROR_EXTERNAL; |
290 |
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} |
291 |
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return 0; |
292 |
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} |
293 |
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294 |
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static int write_picture(AVFormatContext *s, uint8_t *input_data[4], |
295 |
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int linesize[4]) |
296 |
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{ |
297 |
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XVContext *xv = s->priv_data; |
298 |
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XvImage *img = xv->yuv_image; |
299 |
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uint8_t *data[3] = { |
300 |
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img->data + img->offsets[0], |
301 |
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img->data + img->offsets[1], |
302 |
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img->data + img->offsets[2] |
303 |
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}; |
304 |
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|
305 |
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/* Check messages. Window might get closed. */ |
306 |
|
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if (!xv->window_id) { |
307 |
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XEvent event; |
308 |
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while (XPending(xv->display)) { |
309 |
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XNextEvent(xv->display, &event); |
310 |
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if (event.type == ClientMessage && event.xclient.data.l[0] == xv->wm_delete_message) { |
311 |
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av_log(xv, AV_LOG_DEBUG, "Window close event.\n"); |
312 |
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return AVERROR(EPIPE); |
313 |
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} |
314 |
|
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} |
315 |
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} |
316 |
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|
317 |
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av_image_copy(data, img->pitches, (const uint8_t **)input_data, linesize, |
318 |
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xv->image_format, img->width, img->height); |
319 |
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return xv_repaint(s); |
320 |
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} |
321 |
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|
322 |
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static int xv_write_packet(AVFormatContext *s, AVPacket *pkt) |
323 |
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{ |
324 |
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AVCodecParameters *par = s->streams[0]->codecpar; |
325 |
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|
326 |
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if (par->codec_id == AV_CODEC_ID_WRAPPED_AVFRAME) { |
327 |
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AVFrame *frame = (AVFrame *)pkt->data; |
328 |
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return write_picture(s, frame->data, frame->linesize); |
329 |
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} else { |
330 |
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uint8_t *data[4]; |
331 |
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int linesize[4]; |
332 |
|
|
|
333 |
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av_image_fill_arrays(data, linesize, pkt->data, par->format, |
334 |
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par->width, par->height, 1); |
335 |
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return write_picture(s, data, linesize); |
336 |
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} |
337 |
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} |
338 |
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|
339 |
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static int xv_write_frame(AVFormatContext *s, int stream_index, AVFrame **frame, |
340 |
|
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unsigned flags) |
341 |
|
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{ |
342 |
|
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/* xv_write_header() should have accepted only supported formats */ |
343 |
|
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if ((flags & AV_WRITE_UNCODED_FRAME_QUERY)) |
344 |
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return 0; |
345 |
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return write_picture(s, (*frame)->data, (*frame)->linesize); |
346 |
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} |
347 |
|
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|
348 |
|
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static int xv_control_message(AVFormatContext *s, int type, void *data, size_t data_size) |
349 |
|
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{ |
350 |
|
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switch(type) { |
351 |
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case AV_APP_TO_DEV_WINDOW_REPAINT: |
352 |
|
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return xv_repaint(s); |
353 |
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|
default: |
354 |
|
|
break; |
355 |
|
|
} |
356 |
|
|
return AVERROR(ENOSYS); |
357 |
|
|
} |
358 |
|
|
|
359 |
|
|
#define OFFSET(x) offsetof(XVContext, x) |
360 |
|
|
static const AVOption options[] = { |
361 |
|
|
{ "display_name", "set display name", OFFSET(display_name), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM }, |
362 |
|
|
{ "window_id", "set existing window id", OFFSET(window_id), AV_OPT_TYPE_INT64, {.i64 = 0 }, 0, INT64_MAX, AV_OPT_FLAG_ENCODING_PARAM }, |
363 |
|
|
{ "window_size", "set window forced size", OFFSET(window_width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, AV_OPT_FLAG_ENCODING_PARAM }, |
364 |
|
|
{ "window_title", "set window title", OFFSET(window_title), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM }, |
365 |
|
|
{ "window_x", "set window x offset", OFFSET(window_x), AV_OPT_TYPE_INT, {.i64 = 0 }, -INT_MAX, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM }, |
366 |
|
|
{ "window_y", "set window y offset", OFFSET(window_y), AV_OPT_TYPE_INT, {.i64 = 0 }, -INT_MAX, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM }, |
367 |
|
|
{ NULL } |
368 |
|
|
|
369 |
|
|
}; |
370 |
|
|
|
371 |
|
|
static const AVClass xv_class = { |
372 |
|
|
.class_name = "xvideo outdev", |
373 |
|
|
.item_name = av_default_item_name, |
374 |
|
|
.option = options, |
375 |
|
|
.version = LIBAVUTIL_VERSION_INT, |
376 |
|
|
.category = AV_CLASS_CATEGORY_DEVICE_VIDEO_OUTPUT, |
377 |
|
|
}; |
378 |
|
|
|
379 |
|
|
AVOutputFormat ff_xv_muxer = { |
380 |
|
|
.name = "xv", |
381 |
|
|
.long_name = NULL_IF_CONFIG_SMALL("XV (XVideo) output device"), |
382 |
|
|
.priv_data_size = sizeof(XVContext), |
383 |
|
|
.audio_codec = AV_CODEC_ID_NONE, |
384 |
|
|
.video_codec = AV_CODEC_ID_WRAPPED_AVFRAME, |
385 |
|
|
.write_header = xv_write_header, |
386 |
|
|
.write_packet = xv_write_packet, |
387 |
|
|
.write_uncoded_frame = xv_write_frame, |
388 |
|
|
.write_trailer = xv_write_trailer, |
389 |
|
|
.control_message = xv_control_message, |
390 |
|
|
.flags = AVFMT_NOFILE | AVFMT_VARIABLE_FPS | AVFMT_NOTIMESTAMPS, |
391 |
|
|
.priv_class = &xv_class, |
392 |
|
|
}; |