mirror of
https://github.com/FFmpeg/FFmpeg.git
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281 lines
9.2 KiB
C
281 lines
9.2 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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* - add support to window id specification
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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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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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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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} 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 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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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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int num_formats = 0, j, tag, ret;
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AVCodecContext *encctx = s->streams[0]->codec;
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if ( s->nb_streams > 1
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|| encctx->codec_type != AVMEDIA_TYPE_VIDEO
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|| encctx->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(encctx->pix_fmt))) {
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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(encctx->pix_fmt));
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return AVERROR_PATCHWELCOME;
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}
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xv->image_format = encctx->pix_fmt;
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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 = encctx->width;
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xv->image_height = encctx->height;
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if (!xv->window_width && !xv->window_height) {
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AVRational sar = encctx->sample_aspect_ratio;
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xv->window_width = encctx->width;
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xv->window_height = encctx->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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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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XMapWindow(xv->display, xv->window);
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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(encctx->pix_fmt));
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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 = encctx->width;
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xv->image_height = encctx->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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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 int write_picture(AVFormatContext *s, AVPicture *pict)
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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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XWindowAttributes window_attrs;
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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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av_image_copy(data, img->pitches, (const uint8_t **)pict->data, pict->linesize,
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xv->image_format, img->width, img->height);
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XGetWindowAttributes(xv->display, xv->window, &window_attrs);
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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, 0, 0,
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window_attrs.width, window_attrs.height, 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 xv_write_packet(AVFormatContext *s, AVPacket *pkt)
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{
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AVPicture pict;
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AVCodecContext *ctx = s->streams[0]->codec;
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avpicture_fill(&pict, pkt->data, ctx->pix_fmt, ctx->width, ctx->height);
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return write_picture(s, &pict);
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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, (AVPicture *)*frame);
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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_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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.flags = AVFMT_NOFILE | AVFMT_VARIABLE_FPS | AVFMT_NOTIMESTAMPS,
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.priv_class = &xv_class,
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};
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