Add log_level_offset to AVCodecContext.
[libav.git] / libavdevice / vfwcap.c
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/avformat.h"
23 #include <windows.h>
24 #include <vfw.h>
25
26 //#define DEBUG_VFW
27
28 /* Defines for VFW missing from MinGW.
29 * Remove this when MinGW incorporates them. */
30 #define HWND_MESSAGE ((HWND)-3)
31
32 #define BI_RGB 0
33
34 /* End of missing MinGW defines */
35
36 struct vfw_ctx {
37 HWND hwnd;
38 HANDLE mutex;
39 HANDLE event;
40 AVPacketList *pktl;
41 unsigned int curbufsize;
42 unsigned int frame_num;
43 };
44
45 static enum PixelFormat vfw_pixfmt(DWORD biCompression, WORD biBitCount)
46 {
47 switch(biCompression) {
48 case MKTAG('U', 'Y', 'V', 'Y'):
49 return PIX_FMT_UYVY422;
50 case MKTAG('Y', 'U', 'Y', '2'):
51 return PIX_FMT_YUYV422;
52 case MKTAG('I', '4', '2', '0'):
53 return PIX_FMT_YUV420P;
54 case BI_RGB:
55 switch(biBitCount) { /* 1-8 are untested */
56 case 1:
57 return PIX_FMT_MONOWHITE;
58 case 4:
59 return PIX_FMT_RGB4;
60 case 8:
61 return PIX_FMT_RGB8;
62 case 16:
63 return PIX_FMT_RGB555;
64 case 24:
65 return PIX_FMT_BGR24;
66 case 32:
67 return PIX_FMT_RGB32;
68 }
69 }
70 return PIX_FMT_NONE;
71 }
72
73 static enum CodecID vfw_codecid(DWORD biCompression)
74 {
75 switch(biCompression) {
76 case MKTAG('d', 'v', 's', 'd'):
77 return CODEC_ID_DVVIDEO;
78 case MKTAG('M', 'J', 'P', 'G'):
79 case MKTAG('m', 'j', 'p', 'g'):
80 return CODEC_ID_MJPEG;
81 }
82 return CODEC_ID_NONE;
83 }
84
85 #define dstruct(pctx, sname, var, type) \
86 av_log(pctx, AV_LOG_DEBUG, #var":\t%"type"\n", sname->var)
87
88 static void dump_captureparms(AVFormatContext *s, CAPTUREPARMS *cparms)
89 {
90 av_log(s, AV_LOG_DEBUG, "CAPTUREPARMS\n");
91 dstruct(s, cparms, dwRequestMicroSecPerFrame, "lu");
92 dstruct(s, cparms, fMakeUserHitOKToCapture, "d");
93 dstruct(s, cparms, wPercentDropForError, "u");
94 dstruct(s, cparms, fYield, "d");
95 dstruct(s, cparms, dwIndexSize, "lu");
96 dstruct(s, cparms, wChunkGranularity, "u");
97 dstruct(s, cparms, fUsingDOSMemory, "d");
98 dstruct(s, cparms, wNumVideoRequested, "u");
99 dstruct(s, cparms, fCaptureAudio, "d");
100 dstruct(s, cparms, wNumAudioRequested, "u");
101 dstruct(s, cparms, vKeyAbort, "u");
102 dstruct(s, cparms, fAbortLeftMouse, "d");
103 dstruct(s, cparms, fAbortRightMouse, "d");
104 dstruct(s, cparms, fLimitEnabled, "d");
105 dstruct(s, cparms, wTimeLimit, "u");
106 dstruct(s, cparms, fMCIControl, "d");
107 dstruct(s, cparms, fStepMCIDevice, "d");
108 dstruct(s, cparms, dwMCIStartTime, "lu");
109 dstruct(s, cparms, dwMCIStopTime, "lu");
110 dstruct(s, cparms, fStepCaptureAt2x, "d");
111 dstruct(s, cparms, wStepCaptureAverageFrames, "u");
112 dstruct(s, cparms, dwAudioBufferSize, "lu");
113 dstruct(s, cparms, fDisableWriteCache, "d");
114 dstruct(s, cparms, AVStreamMaster, "u");
115 }
116
117 static void dump_videohdr(AVFormatContext *s, VIDEOHDR *vhdr)
118 {
119 #ifdef DEBUG_VFW
120 av_log(s, AV_LOG_DEBUG, "VIDEOHDR\n");
121 dstruct(s, vhdr, lpData, "p");
122 dstruct(s, vhdr, dwBufferLength, "lu");
123 dstruct(s, vhdr, dwBytesUsed, "lu");
124 dstruct(s, vhdr, dwTimeCaptured, "lu");
125 dstruct(s, vhdr, dwUser, "lu");
126 dstruct(s, vhdr, dwFlags, "lu");
127 dstruct(s, vhdr, dwReserved[0], "lu");
128 dstruct(s, vhdr, dwReserved[1], "lu");
129 dstruct(s, vhdr, dwReserved[2], "lu");
130 dstruct(s, vhdr, dwReserved[3], "lu");
131 #endif
132 }
133
134 static void dump_bih(AVFormatContext *s, BITMAPINFOHEADER *bih)
135 {
136 av_log(s, AV_LOG_DEBUG, "BITMAPINFOHEADER\n");
137 dstruct(s, bih, biSize, "lu");
138 dstruct(s, bih, biWidth, "ld");
139 dstruct(s, bih, biHeight, "ld");
140 dstruct(s, bih, biPlanes, "d");
141 dstruct(s, bih, biBitCount, "d");
142 dstruct(s, bih, biCompression, "lu");
143 av_log(s, AV_LOG_DEBUG, " biCompression:\t\"%.4s\"\n",
144 (char*) &bih->biCompression);
145 dstruct(s, bih, biSizeImage, "lu");
146 dstruct(s, bih, biXPelsPerMeter, "lu");
147 dstruct(s, bih, biYPelsPerMeter, "lu");
148 dstruct(s, bih, biClrUsed, "lu");
149 dstruct(s, bih, biClrImportant, "lu");
150 }
151
152 static int shall_we_drop(AVFormatContext *s)
153 {
154 struct vfw_ctx *ctx = s->priv_data;
155 const uint8_t dropscore[] = {62, 75, 87, 100};
156 const int ndropscores = FF_ARRAY_ELEMS(dropscore);
157 unsigned int buffer_fullness = (ctx->curbufsize*100)/s->max_picture_buffer;
158
159 if(dropscore[++ctx->frame_num%ndropscores] <= buffer_fullness) {
160 av_log(s, AV_LOG_ERROR,
161 "real-time buffer %d%% full! frame dropped!\n", buffer_fullness);
162 return 1;
163 }
164
165 return 0;
166 }
167
168 static LRESULT CALLBACK videostream_cb(HWND hwnd, LPVIDEOHDR vdhdr)
169 {
170 AVFormatContext *s;
171 struct vfw_ctx *ctx;
172 AVPacketList **ppktl, *pktl_next;
173
174 s = (AVFormatContext *) GetWindowLongPtr(hwnd, GWLP_USERDATA);
175 ctx = s->priv_data;
176
177 dump_videohdr(s, vdhdr);
178
179 if(shall_we_drop(s))
180 return FALSE;
181
182 WaitForSingleObject(ctx->mutex, INFINITE);
183
184 pktl_next = av_mallocz(sizeof(AVPacketList));
185 if(!pktl_next)
186 goto fail;
187
188 if(av_new_packet(&pktl_next->pkt, vdhdr->dwBytesUsed) < 0) {
189 av_free(pktl_next);
190 goto fail;
191 }
192
193 pktl_next->pkt.pts = vdhdr->dwTimeCaptured;
194 memcpy(pktl_next->pkt.data, vdhdr->lpData, vdhdr->dwBytesUsed);
195
196 for(ppktl = &ctx->pktl ; *ppktl ; ppktl = &(*ppktl)->next);
197 *ppktl = pktl_next;
198
199 ctx->curbufsize += vdhdr->dwBytesUsed;
200
201 SetEvent(ctx->event);
202 ReleaseMutex(ctx->mutex);
203
204 return TRUE;
205 fail:
206 ReleaseMutex(ctx->mutex);
207 return FALSE;
208 }
209
210 static int vfw_read_close(AVFormatContext *s)
211 {
212 struct vfw_ctx *ctx = s->priv_data;
213 AVPacketList *pktl;
214
215 if(ctx->hwnd) {
216 SendMessage(ctx->hwnd, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0, 0);
217 SendMessage(ctx->hwnd, WM_CAP_DRIVER_DISCONNECT, 0, 0);
218 DestroyWindow(ctx->hwnd);
219 }
220 if(ctx->mutex)
221 CloseHandle(ctx->mutex);
222 if(ctx->event)
223 CloseHandle(ctx->event);
224
225 pktl = ctx->pktl;
226 while (pktl) {
227 AVPacketList *next = pktl->next;
228 av_destruct_packet(&pktl->pkt);
229 av_free(pktl);
230 pktl = next;
231 }
232
233 return 0;
234 }
235
236 static int vfw_read_header(AVFormatContext *s, AVFormatParameters *ap)
237 {
238 struct vfw_ctx *ctx = s->priv_data;
239 AVCodecContext *codec;
240 AVStream *st;
241 int devnum;
242 int bisize;
243 BITMAPINFO *bi;
244 CAPTUREPARMS cparms;
245 DWORD biCompression;
246 WORD biBitCount;
247 int width;
248 int height;
249 int ret;
250
251 if(!ap->time_base.den) {
252 av_log(s, AV_LOG_ERROR, "A time base must be specified.\n");
253 return AVERROR(EIO);
254 }
255
256 ctx->hwnd = capCreateCaptureWindow(NULL, 0, 0, 0, 0, 0, HWND_MESSAGE, 0);
257 if(!ctx->hwnd) {
258 av_log(s, AV_LOG_ERROR, "Could not create capture window.\n");
259 return AVERROR(EIO);
260 }
261
262 /* If atoi fails, devnum==0 and the default device is used */
263 devnum = atoi(s->filename);
264
265 ret = SendMessage(ctx->hwnd, WM_CAP_DRIVER_CONNECT, devnum, 0);
266 if(!ret) {
267 av_log(s, AV_LOG_ERROR, "Could not connect to device.\n");
268 DestroyWindow(ctx->hwnd);
269 return AVERROR(ENODEV);
270 }
271
272 SendMessage(ctx->hwnd, WM_CAP_SET_OVERLAY, 0, 0);
273 SendMessage(ctx->hwnd, WM_CAP_SET_PREVIEW, 0, 0);
274
275 ret = SendMessage(ctx->hwnd, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0,
276 (LPARAM) videostream_cb);
277 if(!ret) {
278 av_log(s, AV_LOG_ERROR, "Could not set video stream callback.\n");
279 goto fail_io;
280 }
281
282 SetWindowLongPtr(ctx->hwnd, GWLP_USERDATA, (LONG_PTR) s);
283
284 st = av_new_stream(s, 0);
285 if(!st) {
286 vfw_read_close(s);
287 return AVERROR(ENOMEM);
288 }
289
290 /* Set video format */
291 bisize = SendMessage(ctx->hwnd, WM_CAP_GET_VIDEOFORMAT, 0, 0);
292 if(!bisize)
293 goto fail_io;
294 bi = av_malloc(bisize);
295 if(!bi) {
296 vfw_read_close(s);
297 return AVERROR(ENOMEM);
298 }
299 ret = SendMessage(ctx->hwnd, WM_CAP_GET_VIDEOFORMAT, bisize, (LPARAM) bi);
300 if(!ret)
301 goto fail_bi;
302
303 dump_bih(s, &bi->bmiHeader);
304
305 width = ap->width ? ap->width : bi->bmiHeader.biWidth ;
306 height = ap->height ? ap->height : bi->bmiHeader.biHeight;
307 bi->bmiHeader.biWidth = width ;
308 bi->bmiHeader.biHeight = height;
309
310 if (0) {
311 /* For testing yet unsupported compressions
312 * Copy these values from user-supplied verbose information */
313 bi->bmiHeader.biWidth = 320;
314 bi->bmiHeader.biHeight = 240;
315 bi->bmiHeader.biPlanes = 1;
316 bi->bmiHeader.biBitCount = 12;
317 bi->bmiHeader.biCompression = MKTAG('I','4','2','0');
318 bi->bmiHeader.biSizeImage = 115200;
319 dump_bih(s, &bi->bmiHeader);
320 }
321
322 ret = SendMessage(ctx->hwnd, WM_CAP_SET_VIDEOFORMAT, bisize, (LPARAM) bi);
323 if(!ret) {
324 av_log(s, AV_LOG_ERROR, "Could not set Video Format.\n");
325 goto fail_bi;
326 }
327
328 biCompression = bi->bmiHeader.biCompression;
329 biBitCount = bi->bmiHeader.biBitCount;
330
331 av_free(bi);
332
333 /* Set sequence setup */
334 ret = SendMessage(ctx->hwnd, WM_CAP_GET_SEQUENCE_SETUP, sizeof(cparms),
335 (LPARAM) &cparms);
336 if(!ret)
337 goto fail_io;
338
339 dump_captureparms(s, &cparms);
340
341 cparms.fYield = 1; // Spawn a background thread
342 cparms.dwRequestMicroSecPerFrame =
343 (ap->time_base.num*1000000) / ap->time_base.den;
344 cparms.fAbortLeftMouse = 0;
345 cparms.fAbortRightMouse = 0;
346 cparms.fCaptureAudio = 0;
347 cparms.vKeyAbort = 0;
348
349 ret = SendMessage(ctx->hwnd, WM_CAP_SET_SEQUENCE_SETUP, sizeof(cparms),
350 (LPARAM) &cparms);
351 if(!ret)
352 goto fail_io;
353
354 codec = st->codec;
355 codec->time_base = ap->time_base;
356 codec->codec_type = AVMEDIA_TYPE_VIDEO;
357 codec->width = width;
358 codec->height = height;
359 codec->pix_fmt = vfw_pixfmt(biCompression, biBitCount);
360 if(codec->pix_fmt == PIX_FMT_NONE) {
361 codec->codec_id = vfw_codecid(biCompression);
362 if(codec->codec_id == CODEC_ID_NONE) {
363 av_log(s, AV_LOG_ERROR, "Unknown compression type. "
364 "Please report verbose (-v 9) debug information.\n");
365 vfw_read_close(s);
366 return AVERROR_PATCHWELCOME;
367 }
368 codec->bits_per_coded_sample = biBitCount;
369 } else {
370 codec->codec_id = CODEC_ID_RAWVIDEO;
371 if(biCompression == BI_RGB) {
372 codec->bits_per_coded_sample = biBitCount;
373 codec->extradata = av_malloc(9 + FF_INPUT_BUFFER_PADDING_SIZE);
374 if (codec->extradata) {
375 codec->extradata_size = 9;
376 memcpy(codec->extradata, "BottomUp", 9);
377 }
378 }
379 }
380
381 av_set_pts_info(st, 32, 1, 1000);
382
383 ctx->mutex = CreateMutex(NULL, 0, NULL);
384 if(!ctx->mutex) {
385 av_log(s, AV_LOG_ERROR, "Could not create Mutex.\n" );
386 goto fail_io;
387 }
388 ctx->event = CreateEvent(NULL, 1, 0, NULL);
389 if(!ctx->event) {
390 av_log(s, AV_LOG_ERROR, "Could not create Event.\n" );
391 goto fail_io;
392 }
393
394 ret = SendMessage(ctx->hwnd, WM_CAP_SEQUENCE_NOFILE, 0, 0);
395 if(!ret) {
396 av_log(s, AV_LOG_ERROR, "Could not start capture sequence.\n" );
397 goto fail_io;
398 }
399
400 return 0;
401
402 fail_bi:
403 av_free(bi);
404
405 fail_io:
406 vfw_read_close(s);
407 return AVERROR(EIO);
408 }
409
410 static int vfw_read_packet(AVFormatContext *s, AVPacket *pkt)
411 {
412 struct vfw_ctx *ctx = s->priv_data;
413 AVPacketList *pktl = NULL;
414
415 while(!pktl) {
416 WaitForSingleObject(ctx->mutex, INFINITE);
417 pktl = ctx->pktl;
418 if(ctx->pktl) {
419 *pkt = ctx->pktl->pkt;
420 ctx->pktl = ctx->pktl->next;
421 av_free(pktl);
422 }
423 ResetEvent(ctx->event);
424 ReleaseMutex(ctx->mutex);
425 if(!pktl) {
426 if(s->flags & AVFMT_FLAG_NONBLOCK) {
427 return AVERROR(EAGAIN);
428 } else {
429 WaitForSingleObject(ctx->event, INFINITE);
430 }
431 }
432 }
433
434 ctx->curbufsize -= pkt->size;
435
436 return pkt->size;
437 }
438
439 AVInputFormat vfwcap_demuxer = {
440 "vfwcap",
441 NULL_IF_CONFIG_SMALL("VFW video capture"),
442 sizeof(struct vfw_ctx),
443 NULL,
444 vfw_read_header,
445 vfw_read_packet,
446 vfw_read_close,
447 .flags = AVFMT_NOFILE,
448 };