/* * Copyright (c) 2013 Jeff Moguillansky * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file * XVideo output device * * TODO: * - add support to more formats */ #include <X11/Xlib.h> #include <X11/extensions/Xv.h> #include <X11/extensions/XShm.h> #include <X11/extensions/Xvlib.h> #include <sys/shm.h> #include "libavutil/opt.h" #include "libavutil/pixdesc.h" #include "libavutil/imgutils.h" #include "libavformat/internal.h" #include "avdevice.h" typedef struct { AVClass *class; GC gc; Window window; int64_t window_id; char *window_title; int window_width, window_height; int window_x, window_y; int dest_x, dest_y; /**< display area position */ unsigned int dest_w, dest_h; /**< display area dimensions */ Display* display; char *display_name; XvImage* yuv_image; enum AVPixelFormat image_format; int image_width, image_height; XShmSegmentInfo yuv_shminfo; int xv_port; Atom wm_delete_message; } XVContext; typedef struct XVTagFormatMap { int tag; enum AVPixelFormat format; } XVTagFormatMap; static XVTagFormatMap tag_codec_map[] = { { MKTAG('I','4','2','0'), AV_PIX_FMT_YUV420P }, { MKTAG('U','Y','V','Y'), AV_PIX_FMT_UYVY422 }, { MKTAG('Y','U','Y','2'), AV_PIX_FMT_YUYV422 }, { 0, AV_PIX_FMT_NONE } }; static int xv_get_tag_from_format(enum AVPixelFormat format) { XVTagFormatMap *m = tag_codec_map; int i; for (i = 0; m->tag; m = &tag_codec_map[++i]) { if (m->format == format) return m->tag; } return 0; } static int xv_write_trailer(AVFormatContext *s) { XVContext *xv = s->priv_data; if (xv->display) { XShmDetach(xv->display, &xv->yuv_shminfo); if (xv->yuv_image) shmdt(xv->yuv_image->data); XFree(xv->yuv_image); if (xv->gc) XFreeGC(xv->display, xv->gc); XCloseDisplay(xv->display); } return 0; } static int xv_write_header(AVFormatContext *s) { XVContext *xv = s->priv_data; unsigned int num_adaptors; XvAdaptorInfo *ai; XvImageFormatValues *fv; XColor fgcolor; XWindowAttributes window_attrs; int num_formats = 0, j, tag, ret; AVCodecContext *encctx = s->streams[0]->codec; if ( s->nb_streams > 1 || encctx->codec_type != AVMEDIA_TYPE_VIDEO || encctx->codec_id != AV_CODEC_ID_RAWVIDEO) { av_log(s, AV_LOG_ERROR, "Only supports one rawvideo stream\n"); return AVERROR(EINVAL); } if (!(tag = xv_get_tag_from_format(encctx->pix_fmt))) { av_log(s, AV_LOG_ERROR, "Unsupported pixel format '%s', only yuv420p, uyvy422, yuyv422 are currently supported\n", av_get_pix_fmt_name(encctx->pix_fmt)); return AVERROR_PATCHWELCOME; } xv->image_format = encctx->pix_fmt; xv->display = XOpenDisplay(xv->display_name); if (!xv->display) { av_log(s, AV_LOG_ERROR, "Could not open the X11 display '%s'\n", xv->display_name); return AVERROR(EINVAL); } xv->image_width = encctx->width; xv->image_height = encctx->height; if (!xv->window_width && !xv->window_height) { AVRational sar = encctx->sample_aspect_ratio; xv->window_width = encctx->width; xv->window_height = encctx->height; if (sar.num) { if (sar.num > sar.den) xv->window_width = av_rescale(xv->window_width, sar.num, sar.den); if (sar.num < sar.den) xv->window_height = av_rescale(xv->window_height, sar.den, sar.num); } } if (!xv->window_id) { xv->window = XCreateSimpleWindow(xv->display, DefaultRootWindow(xv->display), xv->window_x, xv->window_y, xv->window_width, xv->window_height, 0, 0, 0); if (!xv->window_title) { if (!(xv->window_title = av_strdup(s->filename))) { ret = AVERROR(ENOMEM); goto fail; } } XStoreName(xv->display, xv->window, xv->window_title); xv->wm_delete_message = XInternAtom(xv->display, "WM_DELETE_WINDOW", False); XSetWMProtocols(xv->display, xv->window, &xv->wm_delete_message, 1); XMapWindow(xv->display, xv->window); } else xv->window = xv->window_id; if (XvQueryAdaptors(xv->display, DefaultRootWindow(xv->display), &num_adaptors, &ai) != Success) { ret = AVERROR_EXTERNAL; goto fail; } if (!num_adaptors) { av_log(s, AV_LOG_ERROR, "No X-Video adaptors present\n"); return AVERROR(ENODEV); } xv->xv_port = ai[0].base_id; XvFreeAdaptorInfo(ai); fv = XvListImageFormats(xv->display, xv->xv_port, &num_formats); if (!fv) { ret = AVERROR_EXTERNAL; goto fail; } for (j = 0; j < num_formats; j++) { if (fv[j].id == tag) { break; } } XFree(fv); if (j >= num_formats) { av_log(s, AV_LOG_ERROR, "Device does not support pixel format %s, aborting\n", av_get_pix_fmt_name(encctx->pix_fmt)); ret = AVERROR(EINVAL); goto fail; } xv->gc = XCreateGC(xv->display, xv->window, 0, 0); xv->image_width = encctx->width; xv->image_height = encctx->height; xv->yuv_image = XvShmCreateImage(xv->display, xv->xv_port, tag, 0, xv->image_width, xv->image_height, &xv->yuv_shminfo); xv->yuv_shminfo.shmid = shmget(IPC_PRIVATE, xv->yuv_image->data_size, IPC_CREAT | 0777); xv->yuv_shminfo.shmaddr = (char *)shmat(xv->yuv_shminfo.shmid, 0, 0); xv->yuv_image->data = xv->yuv_shminfo.shmaddr; xv->yuv_shminfo.readOnly = False; XShmAttach(xv->display, &xv->yuv_shminfo); XSync(xv->display, False); shmctl(xv->yuv_shminfo.shmid, IPC_RMID, 0); XGetWindowAttributes(xv->display, xv->window, &window_attrs); fgcolor.red = fgcolor.green = fgcolor.blue = 0; fgcolor.flags = DoRed | DoGreen | DoBlue; XAllocColor(xv->display, window_attrs.colormap, &fgcolor); XSetForeground(xv->display, xv->gc, fgcolor.pixel); //force display area recalculation at first frame xv->window_width = xv->window_height = 0; return 0; fail: xv_write_trailer(s); return ret; } static void compute_display_area(AVFormatContext *s) { XVContext *xv = s->priv_data; AVRational sar, dar; /* sample and display aspect ratios */ AVStream *st = s->streams[0]; AVCodecContext *encctx = st->codec; /* compute overlay width and height from the codec context information */ sar = st->sample_aspect_ratio.num ? st->sample_aspect_ratio : (AVRational){ 1, 1 }; dar = av_mul_q(sar, (AVRational){ encctx->width, encctx->height }); /* we suppose the screen has a 1/1 sample aspect ratio */ /* fit in the window */ if (av_cmp_q(dar, (AVRational){ xv->dest_w, xv->dest_h }) > 0) { /* fit in width */ xv->dest_y = xv->dest_h; xv->dest_x = 0; xv->dest_h = av_rescale(xv->dest_w, dar.den, dar.num); xv->dest_y -= xv->dest_h; xv->dest_y /= 2; } else { /* fit in height */ xv->dest_x = xv->dest_w; xv->dest_y = 0; xv->dest_w = av_rescale(xv->dest_h, dar.num, dar.den); xv->dest_x -= xv->dest_w; xv->dest_x /= 2; } } static int xv_repaint(AVFormatContext *s) { XVContext *xv = s->priv_data; XWindowAttributes window_attrs; XGetWindowAttributes(xv->display, xv->window, &window_attrs); if (window_attrs.width != xv->window_width || window_attrs.height != xv->window_height) { XRectangle rect[2]; xv->dest_w = window_attrs.width; xv->dest_h = window_attrs.height; compute_display_area(s); if (xv->dest_x) { rect[0].width = rect[1].width = xv->dest_x; rect[0].height = rect[1].height = window_attrs.height; rect[0].y = rect[1].y = 0; rect[0].x = 0; rect[1].x = xv->dest_w + xv->dest_x; XFillRectangles(xv->display, xv->window, xv->gc, rect, 2); } if (xv->dest_y) { rect[0].width = rect[1].width = window_attrs.width; rect[0].height = rect[1].height = xv->dest_y; rect[0].x = rect[1].x = 0; rect[0].y = 0; rect[1].y = xv->dest_h + xv->dest_y; XFillRectangles(xv->display, xv->window, xv->gc, rect, 2); } } if (XvShmPutImage(xv->display, xv->xv_port, xv->window, xv->gc, xv->yuv_image, 0, 0, xv->image_width, xv->image_height, xv->dest_x, xv->dest_y, xv->dest_w, xv->dest_h, True) != Success) { av_log(s, AV_LOG_ERROR, "Could not copy image to XV shared memory buffer\n"); return AVERROR_EXTERNAL; } return 0; } static int write_picture(AVFormatContext *s, AVPicture *pict) { XVContext *xv = s->priv_data; XvImage *img = xv->yuv_image; uint8_t *data[3] = { img->data + img->offsets[0], img->data + img->offsets[1], img->data + img->offsets[2] }; /* Check messages. Window might get closed. */ if (!xv->window_id) { XEvent event; while (XPending(xv->display)) { XNextEvent(xv->display, &event); if (event.type == ClientMessage && event.xclient.data.l[0] == xv->wm_delete_message) { av_log(xv, AV_LOG_DEBUG, "Window close event.\n"); return AVERROR(EPIPE); } } } av_image_copy(data, img->pitches, (const uint8_t **)pict->data, pict->linesize, xv->image_format, img->width, img->height); return xv_repaint(s); } static int xv_write_packet(AVFormatContext *s, AVPacket *pkt) { AVPicture pict; AVCodecContext *ctx = s->streams[0]->codec; avpicture_fill(&pict, pkt->data, ctx->pix_fmt, ctx->width, ctx->height); return write_picture(s, &pict); } static int xv_write_frame(AVFormatContext *s, int stream_index, AVFrame **frame, unsigned flags) { /* xv_write_header() should have accepted only supported formats */ if ((flags & AV_WRITE_UNCODED_FRAME_QUERY)) return 0; return write_picture(s, (AVPicture *)*frame); } static int xv_control_message(AVFormatContext *s, int type, void *data, size_t data_size) { switch(type) { case AV_APP_TO_DEV_WINDOW_REPAINT: return xv_repaint(s); default: break; } return AVERROR(ENOSYS); } #define OFFSET(x) offsetof(XVContext, x) static const AVOption options[] = { { "display_name", "set display name", OFFSET(display_name), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM }, { "window_id", "set existing window id", OFFSET(window_id), AV_OPT_TYPE_INT64, {.i64 = 0 }, 0, INT64_MAX, AV_OPT_FLAG_ENCODING_PARAM }, { "window_size", "set window forced size", OFFSET(window_width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, AV_OPT_FLAG_ENCODING_PARAM }, { "window_title", "set window title", OFFSET(window_title), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM }, { "window_x", "set window x offset", OFFSET(window_x), AV_OPT_TYPE_INT, {.i64 = 0 }, -INT_MAX, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM }, { "window_y", "set window y offset", OFFSET(window_y), AV_OPT_TYPE_INT, {.i64 = 0 }, -INT_MAX, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM }, { NULL } }; static const AVClass xv_class = { .class_name = "xvideo outdev", .item_name = av_default_item_name, .option = options, .version = LIBAVUTIL_VERSION_INT, .category = AV_CLASS_CATEGORY_DEVICE_VIDEO_OUTPUT, }; AVOutputFormat ff_xv_muxer = { .name = "xv", .long_name = NULL_IF_CONFIG_SMALL("XV (XVideo) output device"), .priv_data_size = sizeof(XVContext), .audio_codec = AV_CODEC_ID_NONE, .video_codec = AV_CODEC_ID_RAWVIDEO, .write_header = xv_write_header, .write_packet = xv_write_packet, .write_uncoded_frame = xv_write_frame, .write_trailer = xv_write_trailer, .control_message = xv_control_message, .flags = AVFMT_NOFILE | AVFMT_VARIABLE_FPS | AVFMT_NOTIMESTAMPS, .priv_class = &xv_class, };