mirror of https://github.com/FFmpeg/FFmpeg.git
Based on the work of Jeff Moguillansky <Jeff.Moguillansky@am.sony.com>. See thread: Subject: [FFmpeg-devel] x11 output device for libavdevice Date: Wed, 10 Apr 2013 23:10:47 +0000pull/23/head
Stefano Sabatini
12 years ago
parent
1bbbbb0a32
commit
9f8937b5ef
7 changed files with 290 additions and 2 deletions
@ -0,0 +1,217 @@ |
||||
/*
|
||||
* 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 |
||||
* - add support to window id specification |
||||
*/ |
||||
|
||||
#include <X11/Xlib.h> |
||||
#include <X11/extensions/Xv.h> |
||||
#include <X11/extensions/Xvlib.h> |
||||
#include <X11/extensions/XShm.h> |
||||
#include <sys/shm.h> |
||||
|
||||
#include "libavutil/opt.h" |
||||
#include "libavutil/pixdesc.h" |
||||
#include "avdevice.h" |
||||
|
||||
typedef struct { |
||||
AVClass *class; |
||||
GC gc; |
||||
|
||||
Window window; |
||||
char *window_title; |
||||
int window_width, window_height; |
||||
int window_x, window_y; |
||||
|
||||
Display* display; |
||||
char *display_name; |
||||
|
||||
XvImage* yuv_image; |
||||
int image_width, image_height; |
||||
XShmSegmentInfo yuv_shminfo; |
||||
int xv_port; |
||||
} XVContext; |
||||
|
||||
static int xv_write_header(AVFormatContext *s) |
||||
{ |
||||
XVContext *xv = s->priv_data; |
||||
unsigned int num_adaptors; |
||||
XvAdaptorInfo *ai; |
||||
XvImageFormatValues *fv; |
||||
int num_formats = 0, j; |
||||
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); |
||||
} |
||||
|
||||
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) { |
||||
xv->window_width = encctx->width; |
||||
xv->window_height = encctx->height; |
||||
} |
||||
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))) |
||||
return AVERROR(ENOMEM); |
||||
} |
||||
XStoreName(xv->display, xv->window, xv->window_title); |
||||
XMapWindow(xv->display, xv->window); |
||||
|
||||
if (XvQueryAdaptors(xv->display, DefaultRootWindow(xv->display), &num_adaptors, &ai) != Success) |
||||
return AVERROR_EXTERNAL; |
||||
xv->xv_port = ai[0].base_id; |
||||
|
||||
if (encctx->pix_fmt != AV_PIX_FMT_YUV420P) { |
||||
av_log(s, AV_LOG_ERROR, |
||||
"Unsupported pixel format '%s', only yuv420p is currently supported\n", |
||||
av_get_pix_fmt_name(encctx->pix_fmt)); |
||||
return AVERROR_PATCHWELCOME; |
||||
} |
||||
|
||||
fv = XvListImageFormats(xv->display, xv->xv_port, &num_formats); |
||||
if (!fv) |
||||
return AVERROR_EXTERNAL; |
||||
for (j = 0; j < num_formats; j++) { |
||||
if (fv[j].id == MKTAG('I','4','2','0')) { |
||||
break; |
||||
} |
||||
} |
||||
XFree(fv); |
||||
|
||||
if (j >= num_formats) { |
||||
av_log(s, AV_LOG_ERROR, |
||||
"Device does not support pixel format yuv420p, aborting\n"); |
||||
return AVERROR(EINVAL); |
||||
} |
||||
|
||||
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, |
||||
MKTAG('I','4','2','0'), 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); |
||||
|
||||
return 0; |
||||
} |
||||
|
||||
static int xv_write_packet(AVFormatContext *s, AVPacket *pkt) |
||||
{ |
||||
XVContext *xv = s->priv_data; |
||||
XvImage *img = xv->yuv_image; |
||||
XWindowAttributes window_attrs; |
||||
AVPicture pict; |
||||
AVCodecContext *ctx = s->streams[0]->codec; |
||||
int y, h; |
||||
|
||||
h = img->height / 2; |
||||
|
||||
avpicture_fill(&pict, pkt->data, ctx->pix_fmt, ctx->width, ctx->height); |
||||
for (y = 0; y < img->height; y++) { |
||||
memcpy(&img->data[img->offsets[0] + (y * img->pitches[0])], |
||||
&pict.data[0][y * pict.linesize[0]], img->pitches[0]); |
||||
} |
||||
|
||||
for (y = 0; y < h; ++y) { |
||||
memcpy(&img->data[img->offsets[1] + (y * img->pitches[1])], |
||||
&pict.data[1][y * pict.linesize[1]], img->pitches[1]); |
||||
memcpy(&img->data[img->offsets[2] + (y * img->pitches[2])], |
||||
&pict.data[2][y * pict.linesize[2]], img->pitches[2]); |
||||
} |
||||
|
||||
XGetWindowAttributes(xv->display, xv->window, &window_attrs); |
||||
if (XvShmPutImage(xv->display, xv->xv_port, xv->window, xv->gc, |
||||
xv->yuv_image, 0, 0, xv->image_width, xv->image_height, 0, 0, |
||||
window_attrs.width, window_attrs.height, 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 xv_write_trailer(AVFormatContext *s) |
||||
{ |
||||
XVContext *xv = s->priv_data; |
||||
|
||||
XShmDetach(xv->display, &xv->yuv_shminfo); |
||||
shmdt(xv->yuv_image->data); |
||||
XFree(xv->yuv_image); |
||||
XCloseDisplay(xv->display); |
||||
return 0; |
||||
} |
||||
|
||||
#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_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, |
||||
}; |
||||
|
||||
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_trailer = xv_write_trailer, |
||||
.flags = AVFMT_NOFILE | AVFMT_VARIABLE_FPS | AVFMT_NOTIMESTAMPS, |
||||
.priv_class = &xv_class, |
||||
}; |
||||
Loading…
Reference in new issue