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![Derek Buitenhuis](/assets/img/avatar_default.png)
* commit '9200514ad8717c63f82101dc394f4378854325bf': lavf: replace AVStream.codec with AVStream.codecpar This has been a HUGE effort from: - Derek Buitenhuis <derek.buitenhuis@gmail.com> - Hendrik Leppkes <h.leppkes@gmail.com> - wm4 <nfxjfg@googlemail.com> - Clément Bœsch <clement@stupeflix.com> - James Almer <jamrial@gmail.com> - Michael Niedermayer <michael@niedermayer.cc> - Rostislav Pehlivanov <atomnuker@gmail.com> Merged-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
387 lines
13 KiB
C
387 lines
13 KiB
C
/*
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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_RAWVIDEO) {
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av_log(s, AV_LOG_ERROR, "Only supports one rawvideo stream\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);
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if (!xv->window_title) {
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if (!(xv->window_title = av_strdup(s->filename))) {
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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;
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return 0;
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fail:
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xv_write_trailer(s);
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return ret;
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}
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static void compute_display_area(AVFormatContext *s)
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{
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XVContext *xv = s->priv_data;
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AVRational sar, dar; /* sample and display aspect ratios */
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AVStream *st = s->streams[0];
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AVCodecParameters *par = st->codecpar;
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/* compute overlay width and height from the codec context information */
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sar = st->sample_aspect_ratio.num ? st->sample_aspect_ratio : (AVRational){ 1, 1 };
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dar = av_mul_q(sar, (AVRational){ par->width, par->height });
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/* we suppose the screen has a 1/1 sample aspect ratio */
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/* fit in the window */
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if (av_cmp_q(dar, (AVRational){ xv->dest_w, xv->dest_h }) > 0) {
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/* fit in width */
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xv->dest_y = xv->dest_h;
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xv->dest_x = 0;
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xv->dest_h = av_rescale(xv->dest_w, dar.den, dar.num);
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xv->dest_y -= xv->dest_h;
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xv->dest_y /= 2;
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} else {
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/* fit in height */
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xv->dest_x = xv->dest_w;
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xv->dest_y = 0;
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xv->dest_w = av_rescale(xv->dest_h, dar.num, dar.den);
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xv->dest_x -= xv->dest_w;
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xv->dest_x /= 2;
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}
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}
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static int xv_repaint(AVFormatContext *s)
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{
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XVContext *xv = s->priv_data;
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XWindowAttributes window_attrs;
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XGetWindowAttributes(xv->display, xv->window, &window_attrs);
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if (window_attrs.width != xv->window_width || window_attrs.height != xv->window_height) {
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XRectangle rect[2];
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xv->dest_w = window_attrs.width;
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xv->dest_h = window_attrs.height;
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compute_display_area(s);
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if (xv->dest_x) {
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rect[0].width = rect[1].width = xv->dest_x;
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rect[0].height = rect[1].height = window_attrs.height;
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rect[0].y = rect[1].y = 0;
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rect[0].x = 0;
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rect[1].x = xv->dest_w + xv->dest_x;
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XFillRectangles(xv->display, xv->window, xv->gc, rect, 2);
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}
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if (xv->dest_y) {
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rect[0].width = rect[1].width = window_attrs.width;
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rect[0].height = rect[1].height = xv->dest_y;
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rect[0].x = rect[1].x = 0;
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rect[0].y = 0;
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rect[1].y = xv->dest_h + xv->dest_y;
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XFillRectangles(xv->display, xv->window, xv->gc, rect, 2);
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}
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}
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if (XvShmPutImage(xv->display, xv->xv_port, xv->window, xv->gc,
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xv->yuv_image, 0, 0, xv->image_width, xv->image_height,
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xv->dest_x, xv->dest_y, xv->dest_w, xv->dest_h, True) != Success) {
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av_log(s, AV_LOG_ERROR, "Could not copy image to XV shared memory buffer\n");
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return AVERROR_EXTERNAL;
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}
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return 0;
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}
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static int write_picture(AVFormatContext *s, uint8_t *input_data[4],
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int linesize[4])
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{
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XVContext *xv = s->priv_data;
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XvImage *img = xv->yuv_image;
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uint8_t *data[3] = {
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img->data + img->offsets[0],
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img->data + img->offsets[1],
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img->data + img->offsets[2]
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};
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/* Check messages. Window might get closed. */
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if (!xv->window_id) {
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XEvent event;
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while (XPending(xv->display)) {
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XNextEvent(xv->display, &event);
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if (event.type == ClientMessage && event.xclient.data.l[0] == xv->wm_delete_message) {
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av_log(xv, AV_LOG_DEBUG, "Window close event.\n");
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return AVERROR(EPIPE);
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}
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}
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}
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av_image_copy(data, img->pitches, (const uint8_t **)input_data, linesize,
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xv->image_format, img->width, img->height);
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return xv_repaint(s);
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}
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static int xv_write_packet(AVFormatContext *s, AVPacket *pkt)
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{
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AVCodecParameters *par = s->streams[0]->codecpar;
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uint8_t *data[4];
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int linesize[4];
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av_image_fill_arrays(data, linesize, pkt->data, par->format,
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par->width, par->height, 1);
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return write_picture(s, data, linesize);
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}
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static int xv_write_frame(AVFormatContext *s, int stream_index, AVFrame **frame,
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unsigned flags)
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{
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/* xv_write_header() should have accepted only supported formats */
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if ((flags & AV_WRITE_UNCODED_FRAME_QUERY))
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return 0;
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return write_picture(s, (*frame)->data, (*frame)->linesize);
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}
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static int xv_control_message(AVFormatContext *s, int type, void *data, size_t data_size)
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{
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switch(type) {
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case AV_APP_TO_DEV_WINDOW_REPAINT:
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return xv_repaint(s);
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default:
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break;
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}
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return AVERROR(ENOSYS);
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}
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#define OFFSET(x) offsetof(XVContext, x)
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static const AVOption options[] = {
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{ "display_name", "set display name", OFFSET(display_name), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM },
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{ "window_id", "set existing window id", OFFSET(window_id), AV_OPT_TYPE_INT64, {.i64 = 0 }, 0, INT64_MAX, AV_OPT_FLAG_ENCODING_PARAM },
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{ "window_size", "set window forced size", OFFSET(window_width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, AV_OPT_FLAG_ENCODING_PARAM },
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{ "window_title", "set window title", OFFSET(window_title), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM },
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{ "window_x", "set window x offset", OFFSET(window_x), AV_OPT_TYPE_INT, {.i64 = 0 }, -INT_MAX, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
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{ "window_y", "set window y offset", OFFSET(window_y), AV_OPT_TYPE_INT, {.i64 = 0 }, -INT_MAX, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
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{ NULL }
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};
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static const AVClass xv_class = {
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.class_name = "xvideo outdev",
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.item_name = av_default_item_name,
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.option = options,
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.version = LIBAVUTIL_VERSION_INT,
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.category = AV_CLASS_CATEGORY_DEVICE_VIDEO_OUTPUT,
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};
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AVOutputFormat ff_xv_muxer = {
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.name = "xv",
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.long_name = NULL_IF_CONFIG_SMALL("XV (XVideo) output device"),
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.priv_data_size = sizeof(XVContext),
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.audio_codec = AV_CODEC_ID_NONE,
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.video_codec = AV_CODEC_ID_RAWVIDEO,
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.write_header = xv_write_header,
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.write_packet = xv_write_packet,
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.write_uncoded_frame = xv_write_frame,
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.write_trailer = xv_write_trailer,
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.control_message = xv_control_message,
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.flags = AVFMT_NOFILE | AVFMT_VARIABLE_FPS | AVFMT_NOTIMESTAMPS,
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.priv_class = &xv_class,
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};
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