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1 | /* |
2 | * Copyright (c) 2013 Jeff Moguillansky | |
3 | * | |
4 | * This file is part of FFmpeg. | |
5 | * | |
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. | |
10 | * | |
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. | |
15 | * | |
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 | |
19 | */ | |
20 | ||
21 | /** | |
22 | * @file | |
23 | * XVideo output device | |
24 | * | |
25 | * TODO: | |
26 | * - add support to more formats | |
27 | */ | |
28 | ||
29 | #include <X11/Xlib.h> | |
30 | #include <X11/extensions/Xv.h> | |
31 | #include <X11/extensions/XShm.h> | |
32 | #include <X11/extensions/Xvlib.h> | |
33 | #include <sys/shm.h> | |
34 | ||
35 | #include "libavutil/opt.h" | |
36 | #include "libavutil/pixdesc.h" | |
37 | #include "libavutil/imgutils.h" | |
38 | #include "libavformat/internal.h" | |
39 | #include "avdevice.h" | |
40 | ||
41 | typedef struct { | |
42 | AVClass *class; | |
43 | GC gc; | |
44 | ||
45 | Window window; | |
46 | int64_t window_id; | |
47 | char *window_title; | |
48 | int window_width, window_height; | |
49 | int window_x, window_y; | |
50 | int dest_x, dest_y; /**< display area position */ | |
51 | unsigned int dest_w, dest_h; /**< display area dimensions */ | |
52 | ||
53 | Display* display; | |
54 | char *display_name; | |
55 | ||
56 | XvImage* yuv_image; | |
57 | enum AVPixelFormat image_format; | |
58 | int image_width, image_height; | |
59 | XShmSegmentInfo yuv_shminfo; | |
60 | int xv_port; | |
61 | Atom wm_delete_message; | |
62 | } XVContext; | |
63 | ||
64 | typedef struct XVTagFormatMap | |
65 | { | |
66 | int tag; | |
67 | enum AVPixelFormat format; | |
68 | } XVTagFormatMap; | |
69 | ||
70 | static const XVTagFormatMap tag_codec_map[] = { | |
71 | { MKTAG('I','4','2','0'), AV_PIX_FMT_YUV420P }, | |
72 | { MKTAG('U','Y','V','Y'), AV_PIX_FMT_UYVY422 }, | |
73 | { MKTAG('Y','U','Y','2'), AV_PIX_FMT_YUYV422 }, | |
74 | { 0, AV_PIX_FMT_NONE } | |
75 | }; | |
76 | ||
77 | static int xv_get_tag_from_format(enum AVPixelFormat format) | |
78 | { | |
79 | const XVTagFormatMap *m = tag_codec_map; | |
80 | int i; | |
81 | for (i = 0; m->tag; m = &tag_codec_map[++i]) { | |
82 | if (m->format == format) | |
83 | return m->tag; | |
84 | } | |
85 | return 0; | |
86 | } | |
87 | ||
88 | static int xv_write_trailer(AVFormatContext *s) | |
89 | { | |
90 | XVContext *xv = s->priv_data; | |
91 | if (xv->display) { | |
92 | XShmDetach(xv->display, &xv->yuv_shminfo); | |
93 | if (xv->yuv_image) | |
94 | shmdt(xv->yuv_image->data); | |
95 | XFree(xv->yuv_image); | |
96 | if (xv->gc) | |
97 | XFreeGC(xv->display, xv->gc); | |
98 | XCloseDisplay(xv->display); | |
99 | } | |
100 | return 0; | |
101 | } | |
102 | ||
103 | static int xv_write_header(AVFormatContext *s) | |
104 | { | |
105 | XVContext *xv = s->priv_data; | |
106 | unsigned int num_adaptors; | |
107 | XvAdaptorInfo *ai; | |
108 | XvImageFormatValues *fv; | |
109 | XColor fgcolor; | |
110 | XWindowAttributes window_attrs; | |
111 | int num_formats = 0, j, tag, ret; | |
112 | AVCodecContext *encctx = s->streams[0]->codec; | |
113 | ||
114 | if ( s->nb_streams > 1 | |
115 | || encctx->codec_type != AVMEDIA_TYPE_VIDEO | |
116 | || encctx->codec_id != AV_CODEC_ID_RAWVIDEO) { | |
117 | av_log(s, AV_LOG_ERROR, "Only supports one rawvideo stream\n"); | |
118 | return AVERROR(EINVAL); | |
119 | } | |
120 | ||
121 | if (!(tag = xv_get_tag_from_format(encctx->pix_fmt))) { | |
122 | av_log(s, AV_LOG_ERROR, | |
123 | "Unsupported pixel format '%s', only yuv420p, uyvy422, yuyv422 are currently supported\n", | |
124 | av_get_pix_fmt_name(encctx->pix_fmt)); | |
125 | return AVERROR_PATCHWELCOME; | |
126 | } | |
127 | xv->image_format = encctx->pix_fmt; | |
128 | ||
129 | xv->display = XOpenDisplay(xv->display_name); | |
130 | if (!xv->display) { | |
131 | av_log(s, AV_LOG_ERROR, "Could not open the X11 display '%s'\n", xv->display_name); | |
132 | return AVERROR(EINVAL); | |
133 | } | |
134 | ||
135 | xv->image_width = encctx->width; | |
136 | xv->image_height = encctx->height; | |
137 | if (!xv->window_width && !xv->window_height) { | |
138 | AVRational sar = encctx->sample_aspect_ratio; | |
139 | xv->window_width = encctx->width; | |
140 | xv->window_height = encctx->height; | |
141 | if (sar.num) { | |
142 | if (sar.num > sar.den) | |
143 | xv->window_width = av_rescale(xv->window_width, sar.num, sar.den); | |
144 | if (sar.num < sar.den) | |
145 | xv->window_height = av_rescale(xv->window_height, sar.den, sar.num); | |
146 | } | |
147 | } | |
148 | if (!xv->window_id) { | |
149 | xv->window = XCreateSimpleWindow(xv->display, DefaultRootWindow(xv->display), | |
150 | xv->window_x, xv->window_y, | |
151 | xv->window_width, xv->window_height, | |
152 | 0, 0, 0); | |
153 | if (!xv->window_title) { | |
154 | if (!(xv->window_title = av_strdup(s->filename))) { | |
155 | ret = AVERROR(ENOMEM); | |
156 | goto fail; | |
157 | } | |
158 | } | |
159 | XStoreName(xv->display, xv->window, xv->window_title); | |
160 | xv->wm_delete_message = XInternAtom(xv->display, "WM_DELETE_WINDOW", False); | |
161 | XSetWMProtocols(xv->display, xv->window, &xv->wm_delete_message, 1); | |
162 | XMapWindow(xv->display, xv->window); | |
163 | } else | |
164 | xv->window = xv->window_id; | |
165 | ||
166 | if (XvQueryAdaptors(xv->display, DefaultRootWindow(xv->display), &num_adaptors, &ai) != Success) { | |
167 | ret = AVERROR_EXTERNAL; | |
168 | goto fail; | |
169 | } | |
170 | if (!num_adaptors) { | |
171 | av_log(s, AV_LOG_ERROR, "No X-Video adaptors present\n"); | |
172 | return AVERROR(ENODEV); | |
173 | } | |
174 | xv->xv_port = ai[0].base_id; | |
175 | XvFreeAdaptorInfo(ai); | |
176 | ||
177 | fv = XvListImageFormats(xv->display, xv->xv_port, &num_formats); | |
178 | if (!fv) { | |
179 | ret = AVERROR_EXTERNAL; | |
180 | goto fail; | |
181 | } | |
182 | for (j = 0; j < num_formats; j++) { | |
183 | if (fv[j].id == tag) { | |
184 | break; | |
185 | } | |
186 | } | |
187 | XFree(fv); | |
188 | ||
189 | if (j >= num_formats) { | |
190 | av_log(s, AV_LOG_ERROR, | |
191 | "Device does not support pixel format %s, aborting\n", | |
192 | av_get_pix_fmt_name(encctx->pix_fmt)); | |
193 | ret = AVERROR(EINVAL); | |
194 | goto fail; | |
195 | } | |
196 | ||
197 | xv->gc = XCreateGC(xv->display, xv->window, 0, 0); | |
198 | xv->image_width = encctx->width; | |
199 | xv->image_height = encctx->height; | |
200 | xv->yuv_image = XvShmCreateImage(xv->display, xv->xv_port, tag, 0, | |
201 | xv->image_width, xv->image_height, &xv->yuv_shminfo); | |
202 | xv->yuv_shminfo.shmid = shmget(IPC_PRIVATE, xv->yuv_image->data_size, | |
203 | IPC_CREAT | 0777); | |
204 | xv->yuv_shminfo.shmaddr = (char *)shmat(xv->yuv_shminfo.shmid, 0, 0); | |
205 | xv->yuv_image->data = xv->yuv_shminfo.shmaddr; | |
206 | xv->yuv_shminfo.readOnly = False; | |
207 | ||
208 | XShmAttach(xv->display, &xv->yuv_shminfo); | |
209 | XSync(xv->display, False); | |
210 | shmctl(xv->yuv_shminfo.shmid, IPC_RMID, 0); | |
211 | ||
212 | XGetWindowAttributes(xv->display, xv->window, &window_attrs); | |
213 | fgcolor.red = fgcolor.green = fgcolor.blue = 0; | |
214 | fgcolor.flags = DoRed | DoGreen | DoBlue; | |
215 | XAllocColor(xv->display, window_attrs.colormap, &fgcolor); | |
216 | XSetForeground(xv->display, xv->gc, fgcolor.pixel); | |
217 | //force display area recalculation at first frame | |
218 | xv->window_width = xv->window_height = 0; | |
219 | ||
220 | return 0; | |
221 | fail: | |
222 | xv_write_trailer(s); | |
223 | return ret; | |
224 | } | |
225 | ||
226 | static void compute_display_area(AVFormatContext *s) | |
227 | { | |
228 | XVContext *xv = s->priv_data; | |
229 | AVRational sar, dar; /* sample and display aspect ratios */ | |
230 | AVStream *st = s->streams[0]; | |
231 | AVCodecContext *encctx = st->codec; | |
232 | ||
233 | /* compute overlay width and height from the codec context information */ | |
234 | sar = st->sample_aspect_ratio.num ? st->sample_aspect_ratio : (AVRational){ 1, 1 }; | |
235 | dar = av_mul_q(sar, (AVRational){ encctx->width, encctx->height }); | |
236 | ||
237 | /* we suppose the screen has a 1/1 sample aspect ratio */ | |
238 | /* fit in the window */ | |
239 | if (av_cmp_q(dar, (AVRational){ xv->dest_w, xv->dest_h }) > 0) { | |
240 | /* fit in width */ | |
241 | xv->dest_y = xv->dest_h; | |
242 | xv->dest_x = 0; | |
243 | xv->dest_h = av_rescale(xv->dest_w, dar.den, dar.num); | |
244 | xv->dest_y -= xv->dest_h; | |
245 | xv->dest_y /= 2; | |
246 | } else { | |
247 | /* fit in height */ | |
248 | xv->dest_x = xv->dest_w; | |
249 | xv->dest_y = 0; | |
250 | xv->dest_w = av_rescale(xv->dest_h, dar.num, dar.den); | |
251 | xv->dest_x -= xv->dest_w; | |
252 | xv->dest_x /= 2; | |
253 | } | |
254 | } | |
255 | ||
256 | static int xv_repaint(AVFormatContext *s) | |
257 | { | |
258 | XVContext *xv = s->priv_data; | |
259 | XWindowAttributes window_attrs; | |
260 | ||
261 | XGetWindowAttributes(xv->display, xv->window, &window_attrs); | |
262 | if (window_attrs.width != xv->window_width || window_attrs.height != xv->window_height) { | |
263 | XRectangle rect[2]; | |
264 | xv->dest_w = window_attrs.width; | |
265 | xv->dest_h = window_attrs.height; | |
266 | compute_display_area(s); | |
267 | if (xv->dest_x) { | |
268 | rect[0].width = rect[1].width = xv->dest_x; | |
269 | rect[0].height = rect[1].height = window_attrs.height; | |
270 | rect[0].y = rect[1].y = 0; | |
271 | rect[0].x = 0; | |
272 | rect[1].x = xv->dest_w + xv->dest_x; | |
273 | XFillRectangles(xv->display, xv->window, xv->gc, rect, 2); | |
274 | } | |
275 | if (xv->dest_y) { | |
276 | rect[0].width = rect[1].width = window_attrs.width; | |
277 | rect[0].height = rect[1].height = xv->dest_y; | |
278 | rect[0].x = rect[1].x = 0; | |
279 | rect[0].y = 0; | |
280 | rect[1].y = xv->dest_h + xv->dest_y; | |
281 | XFillRectangles(xv->display, xv->window, xv->gc, rect, 2); | |
282 | } | |
283 | } | |
284 | ||
285 | if (XvShmPutImage(xv->display, xv->xv_port, xv->window, xv->gc, | |
286 | xv->yuv_image, 0, 0, xv->image_width, xv->image_height, | |
287 | xv->dest_x, xv->dest_y, xv->dest_w, xv->dest_h, True) != Success) { | |
288 | av_log(s, AV_LOG_ERROR, "Could not copy image to XV shared memory buffer\n"); | |
289 | return AVERROR_EXTERNAL; | |
290 | } | |
291 | return 0; | |
292 | } | |
293 | ||
294 | static int write_picture(AVFormatContext *s, AVPicture *pict) | |
295 | { | |
296 | XVContext *xv = s->priv_data; | |
297 | XvImage *img = xv->yuv_image; | |
298 | uint8_t *data[3] = { | |
299 | img->data + img->offsets[0], | |
300 | img->data + img->offsets[1], | |
301 | img->data + img->offsets[2] | |
302 | }; | |
303 | ||
304 | /* Check messages. Window might get closed. */ | |
305 | if (!xv->window_id) { | |
306 | XEvent event; | |
307 | while (XPending(xv->display)) { | |
308 | XNextEvent(xv->display, &event); | |
309 | if (event.type == ClientMessage && event.xclient.data.l[0] == xv->wm_delete_message) { | |
310 | av_log(xv, AV_LOG_DEBUG, "Window close event.\n"); | |
311 | return AVERROR(EPIPE); | |
312 | } | |
313 | } | |
314 | } | |
315 | ||
316 | av_image_copy(data, img->pitches, (const uint8_t **)pict->data, pict->linesize, | |
317 | xv->image_format, img->width, img->height); | |
318 | return xv_repaint(s); | |
319 | } | |
320 | ||
321 | static int xv_write_packet(AVFormatContext *s, AVPacket *pkt) | |
322 | { | |
323 | AVPicture pict; | |
324 | AVCodecContext *ctx = s->streams[0]->codec; | |
325 | ||
326 | avpicture_fill(&pict, pkt->data, ctx->pix_fmt, ctx->width, ctx->height); | |
327 | return write_picture(s, &pict); | |
328 | } | |
329 | ||
330 | static int xv_write_frame(AVFormatContext *s, int stream_index, AVFrame **frame, | |
331 | unsigned flags) | |
332 | { | |
333 | /* xv_write_header() should have accepted only supported formats */ | |
334 | if ((flags & AV_WRITE_UNCODED_FRAME_QUERY)) | |
335 | return 0; | |
336 | return write_picture(s, (AVPicture *)*frame); | |
337 | } | |
338 | ||
339 | static int xv_control_message(AVFormatContext *s, int type, void *data, size_t data_size) | |
340 | { | |
341 | switch(type) { | |
342 | case AV_APP_TO_DEV_WINDOW_REPAINT: | |
343 | return xv_repaint(s); | |
344 | default: | |
345 | break; | |
346 | } | |
347 | return AVERROR(ENOSYS); | |
348 | } | |
349 | ||
350 | #define OFFSET(x) offsetof(XVContext, x) | |
351 | static const AVOption options[] = { | |
352 | { "display_name", "set display name", OFFSET(display_name), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM }, | |
353 | { "window_id", "set existing window id", OFFSET(window_id), AV_OPT_TYPE_INT64, {.i64 = 0 }, 0, INT64_MAX, AV_OPT_FLAG_ENCODING_PARAM }, | |
354 | { "window_size", "set window forced size", OFFSET(window_width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, AV_OPT_FLAG_ENCODING_PARAM }, | |
355 | { "window_title", "set window title", OFFSET(window_title), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM }, | |
356 | { "window_x", "set window x offset", OFFSET(window_x), AV_OPT_TYPE_INT, {.i64 = 0 }, -INT_MAX, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM }, | |
357 | { "window_y", "set window y offset", OFFSET(window_y), AV_OPT_TYPE_INT, {.i64 = 0 }, -INT_MAX, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM }, | |
358 | { NULL } | |
359 | ||
360 | }; | |
361 | ||
362 | static const AVClass xv_class = { | |
363 | .class_name = "xvideo outdev", | |
364 | .item_name = av_default_item_name, | |
365 | .option = options, | |
366 | .version = LIBAVUTIL_VERSION_INT, | |
367 | .category = AV_CLASS_CATEGORY_DEVICE_VIDEO_OUTPUT, | |
368 | }; | |
369 | ||
370 | AVOutputFormat ff_xv_muxer = { | |
371 | .name = "xv", | |
372 | .long_name = NULL_IF_CONFIG_SMALL("XV (XVideo) output device"), | |
373 | .priv_data_size = sizeof(XVContext), | |
374 | .audio_codec = AV_CODEC_ID_NONE, | |
375 | .video_codec = AV_CODEC_ID_RAWVIDEO, | |
376 | .write_header = xv_write_header, | |
377 | .write_packet = xv_write_packet, | |
378 | .write_uncoded_frame = xv_write_frame, | |
379 | .write_trailer = xv_write_trailer, | |
380 | .control_message = xv_control_message, | |
381 | .flags = AVFMT_NOFILE | AVFMT_VARIABLE_FPS | AVFMT_NOTIMESTAMPS, | |
382 | .priv_class = &xv_class, | |
383 | }; |