2 * Copyright (c) 2013 Jeff Moguillansky
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 * XVideo output device
26 * - add support to more formats
27 * - add support to window id specification
31 #include <X11/extensions/Xv.h>
32 #include <X11/extensions/XShm.h>
33 #include <X11/extensions/Xvlib.h>
36 #include "libavutil/opt.h"
37 #include "libavutil/pixdesc.h"
46 int window_width, window_height;
47 int window_x, window_y;
53 int image_width, image_height;
54 XShmSegmentInfo yuv_shminfo;
58 static int xv_write_header(AVFormatContext *s)
60 XVContext *xv = s->priv_data;
61 unsigned int num_adaptors;
63 XvImageFormatValues *fv;
64 int num_formats = 0, j;
65 AVCodecContext *encctx = s->streams[0]->codec;
67 if ( s->nb_streams > 1
68 || encctx->codec_type != AVMEDIA_TYPE_VIDEO
69 || encctx->codec_id != AV_CODEC_ID_RAWVIDEO) {
70 av_log(s, AV_LOG_ERROR, "Only supports one rawvideo stream\n");
71 return AVERROR(EINVAL);
74 xv->display = XOpenDisplay(xv->display_name);
76 av_log(s, AV_LOG_ERROR, "Could not open the X11 display '%s'\n", xv->display_name);
77 return AVERROR(EINVAL);
80 xv->image_width = encctx->width;
81 xv->image_height = encctx->height;
82 if (!xv->window_width && !xv->window_height) {
83 xv->window_width = encctx->width;
84 xv->window_height = encctx->height;
86 xv->window = XCreateSimpleWindow(xv->display, DefaultRootWindow(xv->display),
87 xv->window_x, xv->window_y,
88 xv->window_width, xv->window_height,
90 if (!xv->window_title) {
91 if (!(xv->window_title = av_strdup(s->filename)))
92 return AVERROR(ENOMEM);
94 XStoreName(xv->display, xv->window, xv->window_title);
95 XMapWindow(xv->display, xv->window);
97 if (XvQueryAdaptors(xv->display, DefaultRootWindow(xv->display), &num_adaptors, &ai) != Success)
98 return AVERROR_EXTERNAL;
99 xv->xv_port = ai[0].base_id;
101 if (encctx->pix_fmt != AV_PIX_FMT_YUV420P) {
102 av_log(s, AV_LOG_ERROR,
103 "Unsupported pixel format '%s', only yuv420p is currently supported\n",
104 av_get_pix_fmt_name(encctx->pix_fmt));
105 return AVERROR_PATCHWELCOME;
108 fv = XvListImageFormats(xv->display, xv->xv_port, &num_formats);
110 return AVERROR_EXTERNAL;
111 for (j = 0; j < num_formats; j++) {
112 if (fv[j].id == MKTAG('I','4','2','0')) {
118 if (j >= num_formats) {
119 av_log(s, AV_LOG_ERROR,
120 "Device does not support pixel format yuv420p, aborting\n");
121 return AVERROR(EINVAL);
124 xv->gc = XCreateGC(xv->display, xv->window, 0, 0);
125 xv->image_width = encctx->width;
126 xv->image_height = encctx->height;
127 xv->yuv_image = XvShmCreateImage(xv->display, xv->xv_port,
128 MKTAG('I','4','2','0'), 0,
129 xv->image_width, xv->image_height, &xv->yuv_shminfo);
130 xv->yuv_shminfo.shmid = shmget(IPC_PRIVATE, xv->yuv_image->data_size,
132 xv->yuv_shminfo.shmaddr = (char *)shmat(xv->yuv_shminfo.shmid, 0, 0);
133 xv->yuv_image->data = xv->yuv_shminfo.shmaddr;
134 xv->yuv_shminfo.readOnly = False;
136 XShmAttach(xv->display, &xv->yuv_shminfo);
137 XSync(xv->display, False);
138 shmctl(xv->yuv_shminfo.shmid, IPC_RMID, 0);
143 static int xv_write_packet(AVFormatContext *s, AVPacket *pkt)
145 XVContext *xv = s->priv_data;
146 XvImage *img = xv->yuv_image;
147 XWindowAttributes window_attrs;
149 AVCodecContext *ctx = s->streams[0]->codec;
154 avpicture_fill(&pict, pkt->data, ctx->pix_fmt, ctx->width, ctx->height);
155 for (y = 0; y < img->height; y++) {
156 memcpy(&img->data[img->offsets[0] + (y * img->pitches[0])],
157 &pict.data[0][y * pict.linesize[0]], img->pitches[0]);
160 for (y = 0; y < h; ++y) {
161 memcpy(&img->data[img->offsets[1] + (y * img->pitches[1])],
162 &pict.data[1][y * pict.linesize[1]], img->pitches[1]);
163 memcpy(&img->data[img->offsets[2] + (y * img->pitches[2])],
164 &pict.data[2][y * pict.linesize[2]], img->pitches[2]);
167 XGetWindowAttributes(xv->display, xv->window, &window_attrs);
168 if (XvShmPutImage(xv->display, xv->xv_port, xv->window, xv->gc,
169 xv->yuv_image, 0, 0, xv->image_width, xv->image_height, 0, 0,
170 window_attrs.width, window_attrs.height, True) != Success) {
171 av_log(s, AV_LOG_ERROR, "Could not copy image to XV shared memory buffer\n");
172 return AVERROR_EXTERNAL;
177 static int xv_write_trailer(AVFormatContext *s)
179 XVContext *xv = s->priv_data;
181 XShmDetach(xv->display, &xv->yuv_shminfo);
182 shmdt(xv->yuv_image->data);
183 XFree(xv->yuv_image);
184 XCloseDisplay(xv->display);
188 #define OFFSET(x) offsetof(XVContext, x)
189 static const AVOption options[] = {
190 { "display_name", "set display name", OFFSET(display_name), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM },
191 { "window_size", "set window forced size", OFFSET(window_width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, AV_OPT_FLAG_ENCODING_PARAM },
192 { "window_title", "set window title", OFFSET(window_title), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM },
193 { "window_x", "set window x offset", OFFSET(window_x), AV_OPT_TYPE_INT, {.i64 = 0 }, -INT_MAX, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
194 { "window_y", "set window y offset", OFFSET(window_y), AV_OPT_TYPE_INT, {.i64 = 0 }, -INT_MAX, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
199 static const AVClass xv_class = {
200 .class_name = "xvideo outdev",
201 .item_name = av_default_item_name,
203 .version = LIBAVUTIL_VERSION_INT,
206 AVOutputFormat ff_xv_muxer = {
208 .long_name = NULL_IF_CONFIG_SMALL("XV (XVideo) output device"),
209 .priv_data_size = sizeof(XVContext),
210 .audio_codec = AV_CODEC_ID_NONE,
211 .video_codec = AV_CODEC_ID_RAWVIDEO,
212 .write_header = xv_write_header,
213 .write_packet = xv_write_packet,
214 .write_trailer = xv_write_trailer,
215 .flags = AVFMT_NOFILE | AVFMT_VARIABLE_FPS | AVFMT_NOTIMESTAMPS,
216 .priv_class = &xv_class,