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2ba45a60 DM |
1 | /* |
2 | * VFW capture interface | |
3 | * Copyright (c) 2006-2008 Ramiro Polla | |
4 | * | |
5 | * This file is part of FFmpeg. | |
6 | * | |
7 | * FFmpeg is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU Lesser General Public | |
9 | * License as published by the Free Software Foundation; either | |
10 | * version 2.1 of the License, or (at your option) any later version. | |
11 | * | |
12 | * FFmpeg is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public | |
18 | * License along with FFmpeg; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
20 | */ | |
21 | ||
22 | #include "libavformat/internal.h" | |
23 | #include "libavutil/log.h" | |
24 | #include "libavutil/opt.h" | |
25 | #include "libavutil/parseutils.h" | |
26 | #include <windows.h> | |
27 | #include <vfw.h> | |
28 | #include "avdevice.h" | |
29 | ||
30 | /* Some obsolete versions of MinGW32 before 4.0.0 lack this. */ | |
31 | #ifndef HWND_MESSAGE | |
32 | #define HWND_MESSAGE ((HWND) -3) | |
33 | #endif | |
34 | ||
35 | struct vfw_ctx { | |
36 | const AVClass *class; | |
37 | HWND hwnd; | |
38 | HANDLE mutex; | |
39 | HANDLE event; | |
40 | AVPacketList *pktl; | |
41 | unsigned int curbufsize; | |
42 | unsigned int frame_num; | |
43 | char *video_size; /**< A string describing video size, set by a private option. */ | |
44 | char *framerate; /**< Set by a private option. */ | |
45 | }; | |
46 | ||
47 | static enum AVPixelFormat vfw_pixfmt(DWORD biCompression, WORD biBitCount) | |
48 | { | |
49 | switch(biCompression) { | |
50 | case MKTAG('U', 'Y', 'V', 'Y'): | |
51 | return AV_PIX_FMT_UYVY422; | |
52 | case MKTAG('Y', 'U', 'Y', '2'): | |
53 | return AV_PIX_FMT_YUYV422; | |
54 | case MKTAG('I', '4', '2', '0'): | |
55 | return AV_PIX_FMT_YUV420P; | |
56 | case BI_RGB: | |
57 | switch(biBitCount) { /* 1-8 are untested */ | |
58 | case 1: | |
59 | return AV_PIX_FMT_MONOWHITE; | |
60 | case 4: | |
61 | return AV_PIX_FMT_RGB4; | |
62 | case 8: | |
63 | return AV_PIX_FMT_RGB8; | |
64 | case 16: | |
65 | return AV_PIX_FMT_RGB555; | |
66 | case 24: | |
67 | return AV_PIX_FMT_BGR24; | |
68 | case 32: | |
69 | return AV_PIX_FMT_RGB32; | |
70 | } | |
71 | } | |
72 | return AV_PIX_FMT_NONE; | |
73 | } | |
74 | ||
75 | static enum AVCodecID vfw_codecid(DWORD biCompression) | |
76 | { | |
77 | switch(biCompression) { | |
78 | case MKTAG('d', 'v', 's', 'd'): | |
79 | return AV_CODEC_ID_DVVIDEO; | |
80 | case MKTAG('M', 'J', 'P', 'G'): | |
81 | case MKTAG('m', 'j', 'p', 'g'): | |
82 | return AV_CODEC_ID_MJPEG; | |
83 | } | |
84 | return AV_CODEC_ID_NONE; | |
85 | } | |
86 | ||
87 | #define dstruct(pctx, sname, var, type) \ | |
88 | av_log(pctx, AV_LOG_DEBUG, #var":\t%"type"\n", sname->var) | |
89 | ||
90 | static void dump_captureparms(AVFormatContext *s, CAPTUREPARMS *cparms) | |
91 | { | |
92 | av_log(s, AV_LOG_DEBUG, "CAPTUREPARMS\n"); | |
93 | dstruct(s, cparms, dwRequestMicroSecPerFrame, "lu"); | |
94 | dstruct(s, cparms, fMakeUserHitOKToCapture, "d"); | |
95 | dstruct(s, cparms, wPercentDropForError, "u"); | |
96 | dstruct(s, cparms, fYield, "d"); | |
97 | dstruct(s, cparms, dwIndexSize, "lu"); | |
98 | dstruct(s, cparms, wChunkGranularity, "u"); | |
99 | dstruct(s, cparms, fUsingDOSMemory, "d"); | |
100 | dstruct(s, cparms, wNumVideoRequested, "u"); | |
101 | dstruct(s, cparms, fCaptureAudio, "d"); | |
102 | dstruct(s, cparms, wNumAudioRequested, "u"); | |
103 | dstruct(s, cparms, vKeyAbort, "u"); | |
104 | dstruct(s, cparms, fAbortLeftMouse, "d"); | |
105 | dstruct(s, cparms, fAbortRightMouse, "d"); | |
106 | dstruct(s, cparms, fLimitEnabled, "d"); | |
107 | dstruct(s, cparms, wTimeLimit, "u"); | |
108 | dstruct(s, cparms, fMCIControl, "d"); | |
109 | dstruct(s, cparms, fStepMCIDevice, "d"); | |
110 | dstruct(s, cparms, dwMCIStartTime, "lu"); | |
111 | dstruct(s, cparms, dwMCIStopTime, "lu"); | |
112 | dstruct(s, cparms, fStepCaptureAt2x, "d"); | |
113 | dstruct(s, cparms, wStepCaptureAverageFrames, "u"); | |
114 | dstruct(s, cparms, dwAudioBufferSize, "lu"); | |
115 | dstruct(s, cparms, fDisableWriteCache, "d"); | |
116 | dstruct(s, cparms, AVStreamMaster, "u"); | |
117 | } | |
118 | ||
119 | static void dump_videohdr(AVFormatContext *s, VIDEOHDR *vhdr) | |
120 | { | |
121 | #ifdef DEBUG | |
122 | av_log(s, AV_LOG_DEBUG, "VIDEOHDR\n"); | |
123 | dstruct(s, vhdr, lpData, "p"); | |
124 | dstruct(s, vhdr, dwBufferLength, "lu"); | |
125 | dstruct(s, vhdr, dwBytesUsed, "lu"); | |
126 | dstruct(s, vhdr, dwTimeCaptured, "lu"); | |
127 | dstruct(s, vhdr, dwUser, "lu"); | |
128 | dstruct(s, vhdr, dwFlags, "lu"); | |
129 | dstruct(s, vhdr, dwReserved[0], "lu"); | |
130 | dstruct(s, vhdr, dwReserved[1], "lu"); | |
131 | dstruct(s, vhdr, dwReserved[2], "lu"); | |
132 | dstruct(s, vhdr, dwReserved[3], "lu"); | |
133 | #endif | |
134 | } | |
135 | ||
136 | static void dump_bih(AVFormatContext *s, BITMAPINFOHEADER *bih) | |
137 | { | |
138 | av_log(s, AV_LOG_DEBUG, "BITMAPINFOHEADER\n"); | |
139 | dstruct(s, bih, biSize, "lu"); | |
140 | dstruct(s, bih, biWidth, "ld"); | |
141 | dstruct(s, bih, biHeight, "ld"); | |
142 | dstruct(s, bih, biPlanes, "d"); | |
143 | dstruct(s, bih, biBitCount, "d"); | |
144 | dstruct(s, bih, biCompression, "lu"); | |
145 | av_log(s, AV_LOG_DEBUG, " biCompression:\t\"%.4s\"\n", | |
146 | (char*) &bih->biCompression); | |
147 | dstruct(s, bih, biSizeImage, "lu"); | |
148 | dstruct(s, bih, biXPelsPerMeter, "lu"); | |
149 | dstruct(s, bih, biYPelsPerMeter, "lu"); | |
150 | dstruct(s, bih, biClrUsed, "lu"); | |
151 | dstruct(s, bih, biClrImportant, "lu"); | |
152 | } | |
153 | ||
154 | static int shall_we_drop(AVFormatContext *s) | |
155 | { | |
156 | struct vfw_ctx *ctx = s->priv_data; | |
157 | static const uint8_t dropscore[] = {62, 75, 87, 100}; | |
158 | const int ndropscores = FF_ARRAY_ELEMS(dropscore); | |
159 | unsigned int buffer_fullness = (ctx->curbufsize*100)/s->max_picture_buffer; | |
160 | ||
161 | if(dropscore[++ctx->frame_num%ndropscores] <= buffer_fullness) { | |
162 | av_log(s, AV_LOG_ERROR, | |
163 | "real-time buffer %d%% full! frame dropped!\n", buffer_fullness); | |
164 | return 1; | |
165 | } | |
166 | ||
167 | return 0; | |
168 | } | |
169 | ||
170 | static LRESULT CALLBACK videostream_cb(HWND hwnd, LPVIDEOHDR vdhdr) | |
171 | { | |
172 | AVFormatContext *s; | |
173 | struct vfw_ctx *ctx; | |
174 | AVPacketList **ppktl, *pktl_next; | |
175 | ||
176 | s = (AVFormatContext *) GetWindowLongPtr(hwnd, GWLP_USERDATA); | |
177 | ctx = s->priv_data; | |
178 | ||
179 | dump_videohdr(s, vdhdr); | |
180 | ||
181 | if(shall_we_drop(s)) | |
182 | return FALSE; | |
183 | ||
184 | WaitForSingleObject(ctx->mutex, INFINITE); | |
185 | ||
186 | pktl_next = av_mallocz(sizeof(AVPacketList)); | |
187 | if(!pktl_next) | |
188 | goto fail; | |
189 | ||
190 | if(av_new_packet(&pktl_next->pkt, vdhdr->dwBytesUsed) < 0) { | |
191 | av_free(pktl_next); | |
192 | goto fail; | |
193 | } | |
194 | ||
195 | pktl_next->pkt.pts = vdhdr->dwTimeCaptured; | |
196 | memcpy(pktl_next->pkt.data, vdhdr->lpData, vdhdr->dwBytesUsed); | |
197 | ||
198 | for(ppktl = &ctx->pktl ; *ppktl ; ppktl = &(*ppktl)->next); | |
199 | *ppktl = pktl_next; | |
200 | ||
201 | ctx->curbufsize += vdhdr->dwBytesUsed; | |
202 | ||
203 | SetEvent(ctx->event); | |
204 | ReleaseMutex(ctx->mutex); | |
205 | ||
206 | return TRUE; | |
207 | fail: | |
208 | ReleaseMutex(ctx->mutex); | |
209 | return FALSE; | |
210 | } | |
211 | ||
212 | static int vfw_read_close(AVFormatContext *s) | |
213 | { | |
214 | struct vfw_ctx *ctx = s->priv_data; | |
215 | AVPacketList *pktl; | |
216 | ||
217 | if(ctx->hwnd) { | |
218 | SendMessage(ctx->hwnd, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0, 0); | |
219 | SendMessage(ctx->hwnd, WM_CAP_DRIVER_DISCONNECT, 0, 0); | |
220 | DestroyWindow(ctx->hwnd); | |
221 | } | |
222 | if(ctx->mutex) | |
223 | CloseHandle(ctx->mutex); | |
224 | if(ctx->event) | |
225 | CloseHandle(ctx->event); | |
226 | ||
227 | pktl = ctx->pktl; | |
228 | while (pktl) { | |
229 | AVPacketList *next = pktl->next; | |
230 | av_free_packet(&pktl->pkt); | |
231 | av_free(pktl); | |
232 | pktl = next; | |
233 | } | |
234 | ||
235 | return 0; | |
236 | } | |
237 | ||
238 | static int vfw_read_header(AVFormatContext *s) | |
239 | { | |
240 | struct vfw_ctx *ctx = s->priv_data; | |
241 | AVCodecContext *codec; | |
242 | AVStream *st; | |
243 | int devnum; | |
244 | int bisize; | |
245 | BITMAPINFO *bi = NULL; | |
246 | CAPTUREPARMS cparms; | |
247 | DWORD biCompression; | |
248 | WORD biBitCount; | |
249 | int ret; | |
250 | AVRational framerate_q; | |
251 | ||
252 | if (!strcmp(s->filename, "list")) { | |
253 | for (devnum = 0; devnum <= 9; devnum++) { | |
254 | char driver_name[256]; | |
255 | char driver_ver[256]; | |
256 | ret = capGetDriverDescription(devnum, | |
257 | driver_name, sizeof(driver_name), | |
258 | driver_ver, sizeof(driver_ver)); | |
259 | if (ret) { | |
260 | av_log(s, AV_LOG_INFO, "Driver %d\n", devnum); | |
261 | av_log(s, AV_LOG_INFO, " %s\n", driver_name); | |
262 | av_log(s, AV_LOG_INFO, " %s\n", driver_ver); | |
263 | } | |
264 | } | |
265 | return AVERROR(EIO); | |
266 | } | |
267 | ||
268 | ctx->hwnd = capCreateCaptureWindow(NULL, 0, 0, 0, 0, 0, HWND_MESSAGE, 0); | |
269 | if(!ctx->hwnd) { | |
270 | av_log(s, AV_LOG_ERROR, "Could not create capture window.\n"); | |
271 | return AVERROR(EIO); | |
272 | } | |
273 | ||
274 | /* If atoi fails, devnum==0 and the default device is used */ | |
275 | devnum = atoi(s->filename); | |
276 | ||
277 | ret = SendMessage(ctx->hwnd, WM_CAP_DRIVER_CONNECT, devnum, 0); | |
278 | if(!ret) { | |
279 | av_log(s, AV_LOG_ERROR, "Could not connect to device.\n"); | |
280 | DestroyWindow(ctx->hwnd); | |
281 | return AVERROR(ENODEV); | |
282 | } | |
283 | ||
284 | SendMessage(ctx->hwnd, WM_CAP_SET_OVERLAY, 0, 0); | |
285 | SendMessage(ctx->hwnd, WM_CAP_SET_PREVIEW, 0, 0); | |
286 | ||
287 | ret = SendMessage(ctx->hwnd, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0, | |
288 | (LPARAM) videostream_cb); | |
289 | if(!ret) { | |
290 | av_log(s, AV_LOG_ERROR, "Could not set video stream callback.\n"); | |
291 | goto fail; | |
292 | } | |
293 | ||
294 | SetWindowLongPtr(ctx->hwnd, GWLP_USERDATA, (LONG_PTR) s); | |
295 | ||
296 | st = avformat_new_stream(s, NULL); | |
297 | if(!st) { | |
298 | vfw_read_close(s); | |
299 | return AVERROR(ENOMEM); | |
300 | } | |
301 | ||
302 | /* Set video format */ | |
303 | bisize = SendMessage(ctx->hwnd, WM_CAP_GET_VIDEOFORMAT, 0, 0); | |
304 | if(!bisize) | |
305 | goto fail; | |
306 | bi = av_malloc(bisize); | |
307 | if(!bi) { | |
308 | vfw_read_close(s); | |
309 | return AVERROR(ENOMEM); | |
310 | } | |
311 | ret = SendMessage(ctx->hwnd, WM_CAP_GET_VIDEOFORMAT, bisize, (LPARAM) bi); | |
312 | if(!ret) | |
313 | goto fail; | |
314 | ||
315 | dump_bih(s, &bi->bmiHeader); | |
316 | ||
317 | ret = av_parse_video_rate(&framerate_q, ctx->framerate); | |
318 | if (ret < 0) { | |
319 | av_log(s, AV_LOG_ERROR, "Could not parse framerate '%s'.\n", ctx->framerate); | |
320 | goto fail; | |
321 | } | |
322 | ||
323 | if (ctx->video_size) { | |
324 | ret = av_parse_video_size(&bi->bmiHeader.biWidth, &bi->bmiHeader.biHeight, ctx->video_size); | |
325 | if (ret < 0) { | |
326 | av_log(s, AV_LOG_ERROR, "Couldn't parse video size.\n"); | |
327 | goto fail; | |
328 | } | |
329 | } | |
330 | ||
331 | if (0) { | |
332 | /* For testing yet unsupported compressions | |
333 | * Copy these values from user-supplied verbose information */ | |
334 | bi->bmiHeader.biWidth = 320; | |
335 | bi->bmiHeader.biHeight = 240; | |
336 | bi->bmiHeader.biPlanes = 1; | |
337 | bi->bmiHeader.biBitCount = 12; | |
338 | bi->bmiHeader.biCompression = MKTAG('I','4','2','0'); | |
339 | bi->bmiHeader.biSizeImage = 115200; | |
340 | dump_bih(s, &bi->bmiHeader); | |
341 | } | |
342 | ||
343 | ret = SendMessage(ctx->hwnd, WM_CAP_SET_VIDEOFORMAT, bisize, (LPARAM) bi); | |
344 | if(!ret) { | |
345 | av_log(s, AV_LOG_ERROR, "Could not set Video Format.\n"); | |
346 | goto fail; | |
347 | } | |
348 | ||
349 | biCompression = bi->bmiHeader.biCompression; | |
350 | biBitCount = bi->bmiHeader.biBitCount; | |
351 | ||
352 | /* Set sequence setup */ | |
353 | ret = SendMessage(ctx->hwnd, WM_CAP_GET_SEQUENCE_SETUP, sizeof(cparms), | |
354 | (LPARAM) &cparms); | |
355 | if(!ret) | |
356 | goto fail; | |
357 | ||
358 | dump_captureparms(s, &cparms); | |
359 | ||
360 | cparms.fYield = 1; // Spawn a background thread | |
361 | cparms.dwRequestMicroSecPerFrame = | |
362 | (framerate_q.den*1000000) / framerate_q.num; | |
363 | cparms.fAbortLeftMouse = 0; | |
364 | cparms.fAbortRightMouse = 0; | |
365 | cparms.fCaptureAudio = 0; | |
366 | cparms.vKeyAbort = 0; | |
367 | ||
368 | ret = SendMessage(ctx->hwnd, WM_CAP_SET_SEQUENCE_SETUP, sizeof(cparms), | |
369 | (LPARAM) &cparms); | |
370 | if(!ret) | |
371 | goto fail; | |
372 | ||
373 | codec = st->codec; | |
374 | codec->time_base = av_inv_q(framerate_q); | |
375 | codec->codec_type = AVMEDIA_TYPE_VIDEO; | |
376 | codec->width = bi->bmiHeader.biWidth; | |
377 | codec->height = bi->bmiHeader.biHeight; | |
378 | codec->pix_fmt = vfw_pixfmt(biCompression, biBitCount); | |
379 | if(codec->pix_fmt == AV_PIX_FMT_NONE) { | |
380 | codec->codec_id = vfw_codecid(biCompression); | |
381 | if(codec->codec_id == AV_CODEC_ID_NONE) { | |
382 | av_log(s, AV_LOG_ERROR, "Unknown compression type. " | |
383 | "Please report verbose (-v 9) debug information.\n"); | |
384 | vfw_read_close(s); | |
385 | return AVERROR_PATCHWELCOME; | |
386 | } | |
387 | codec->bits_per_coded_sample = biBitCount; | |
388 | } else { | |
389 | codec->codec_id = AV_CODEC_ID_RAWVIDEO; | |
390 | if(biCompression == BI_RGB) { | |
391 | codec->bits_per_coded_sample = biBitCount; | |
392 | codec->extradata = av_malloc(9 + FF_INPUT_BUFFER_PADDING_SIZE); | |
393 | if (codec->extradata) { | |
394 | codec->extradata_size = 9; | |
395 | memcpy(codec->extradata, "BottomUp", 9); | |
396 | } | |
397 | } | |
398 | } | |
399 | ||
400 | av_freep(&bi); | |
401 | ||
402 | avpriv_set_pts_info(st, 32, 1, 1000); | |
403 | ||
404 | ctx->mutex = CreateMutex(NULL, 0, NULL); | |
405 | if(!ctx->mutex) { | |
406 | av_log(s, AV_LOG_ERROR, "Could not create Mutex.\n" ); | |
407 | goto fail; | |
408 | } | |
409 | ctx->event = CreateEvent(NULL, 1, 0, NULL); | |
410 | if(!ctx->event) { | |
411 | av_log(s, AV_LOG_ERROR, "Could not create Event.\n" ); | |
412 | goto fail; | |
413 | } | |
414 | ||
415 | ret = SendMessage(ctx->hwnd, WM_CAP_SEQUENCE_NOFILE, 0, 0); | |
416 | if(!ret) { | |
417 | av_log(s, AV_LOG_ERROR, "Could not start capture sequence.\n" ); | |
418 | goto fail; | |
419 | } | |
420 | ||
421 | return 0; | |
422 | ||
423 | fail: | |
424 | av_freep(&bi); | |
425 | vfw_read_close(s); | |
426 | return AVERROR(EIO); | |
427 | } | |
428 | ||
429 | static int vfw_read_packet(AVFormatContext *s, AVPacket *pkt) | |
430 | { | |
431 | struct vfw_ctx *ctx = s->priv_data; | |
432 | AVPacketList *pktl = NULL; | |
433 | ||
434 | while(!pktl) { | |
435 | WaitForSingleObject(ctx->mutex, INFINITE); | |
436 | pktl = ctx->pktl; | |
437 | if(ctx->pktl) { | |
438 | *pkt = ctx->pktl->pkt; | |
439 | ctx->pktl = ctx->pktl->next; | |
440 | av_free(pktl); | |
441 | } | |
442 | ResetEvent(ctx->event); | |
443 | ReleaseMutex(ctx->mutex); | |
444 | if(!pktl) { | |
445 | if(s->flags & AVFMT_FLAG_NONBLOCK) { | |
446 | return AVERROR(EAGAIN); | |
447 | } else { | |
448 | WaitForSingleObject(ctx->event, INFINITE); | |
449 | } | |
450 | } | |
451 | } | |
452 | ||
453 | ctx->curbufsize -= pkt->size; | |
454 | ||
455 | return pkt->size; | |
456 | } | |
457 | ||
458 | #define OFFSET(x) offsetof(struct vfw_ctx, x) | |
459 | #define DEC AV_OPT_FLAG_DECODING_PARAM | |
460 | static const AVOption options[] = { | |
461 | { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC }, | |
462 | { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = "ntsc"}, 0, 0, DEC }, | |
463 | { NULL }, | |
464 | }; | |
465 | ||
466 | static const AVClass vfw_class = { | |
467 | .class_name = "VFW indev", | |
468 | .item_name = av_default_item_name, | |
469 | .option = options, | |
470 | .version = LIBAVUTIL_VERSION_INT, | |
471 | .category = AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT | |
472 | }; | |
473 | ||
474 | AVInputFormat ff_vfwcap_demuxer = { | |
475 | .name = "vfwcap", | |
476 | .long_name = NULL_IF_CONFIG_SMALL("VfW video capture"), | |
477 | .priv_data_size = sizeof(struct vfw_ctx), | |
478 | .read_header = vfw_read_header, | |
479 | .read_packet = vfw_read_packet, | |
480 | .read_close = vfw_read_close, | |
481 | .flags = AVFMT_NOFILE, | |
482 | .priv_class = &vfw_class, | |
483 | }; |