mingw: update w32api to 3.13
[libav.git] / libavdevice / vfwcap.c
CommitLineData
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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
245976da 22#include "libavformat/avformat.h"
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23#include <vfw.h>
24#include <windows.h>
25
26//#define DEBUG_VFW
27
28/* Defines for VFW missing from MinGW.
29 * Remove this when MinGW incorporates them. */
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30#define HWND_MESSAGE ((HWND)-3)
31
32#define BI_RGB 0
33
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34/* End of missing MinGW defines */
35
36struct vfw_ctx {
37 HWND hwnd;
38 HANDLE mutex;
39 HANDLE event;
40 AVPacketList *pktl;
41 AVFormatContext *s;
42 unsigned int curbufsize;
43 unsigned int frame_num;
44};
45
46static enum PixelFormat vfw_pixfmt(DWORD biCompression, WORD biBitCount)
47{
48 switch(biCompression) {
49 case MKTAG('Y', 'U', 'Y', '2'):
50 return PIX_FMT_YUYV422;
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51 case MKTAG('I', '4', '2', '0'):
52 return PIX_FMT_YUV420P;
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53 case BI_RGB:
54 switch(biBitCount) { /* 1-8 are untested */
55 case 1:
56 return PIX_FMT_MONOWHITE;
57 case 4:
58 return PIX_FMT_RGB4;
59 case 8:
60 return PIX_FMT_RGB8;
61 case 16:
62 return PIX_FMT_RGB555;
63 case 24:
64 return PIX_FMT_BGR24;
65 case 32:
66 return PIX_FMT_RGB32;
67 }
68 }
69 return -1;
70}
71
72#define dstruct(pctx, sname, var, type) \
73 av_log(pctx, AV_LOG_DEBUG, #var":\t%"type"\n", sname->var)
74
75static void dump_captureparms(AVFormatContext *s, CAPTUREPARMS *cparms)
76{
77 av_log(s, AV_LOG_DEBUG, "CAPTUREPARMS\n");
78 dstruct(s, cparms, dwRequestMicroSecPerFrame, "lu");
79 dstruct(s, cparms, fMakeUserHitOKToCapture, "d");
80 dstruct(s, cparms, wPercentDropForError, "u");
81 dstruct(s, cparms, fYield, "d");
82 dstruct(s, cparms, dwIndexSize, "lu");
83 dstruct(s, cparms, wChunkGranularity, "u");
84 dstruct(s, cparms, fUsingDOSMemory, "d");
85 dstruct(s, cparms, wNumVideoRequested, "u");
86 dstruct(s, cparms, fCaptureAudio, "d");
87 dstruct(s, cparms, wNumAudioRequested, "u");
88 dstruct(s, cparms, vKeyAbort, "u");
89 dstruct(s, cparms, fAbortLeftMouse, "d");
90 dstruct(s, cparms, fAbortRightMouse, "d");
91 dstruct(s, cparms, fLimitEnabled, "d");
92 dstruct(s, cparms, wTimeLimit, "u");
93 dstruct(s, cparms, fMCIControl, "d");
94 dstruct(s, cparms, fStepMCIDevice, "d");
95 dstruct(s, cparms, dwMCIStartTime, "lu");
96 dstruct(s, cparms, dwMCIStopTime, "lu");
97 dstruct(s, cparms, fStepCaptureAt2x, "d");
98 dstruct(s, cparms, wStepCaptureAverageFrames, "u");
99 dstruct(s, cparms, dwAudioBufferSize, "lu");
100 dstruct(s, cparms, fDisableWriteCache, "d");
101 dstruct(s, cparms, AVStreamMaster, "u");
102}
103
104static void dump_videohdr(AVFormatContext *s, VIDEOHDR *vhdr)
105{
106#ifdef DEBUG_VFW
107 av_log(s, AV_LOG_DEBUG, "VIDEOHDR\n");
108 dstruct(s, vhdr, lpData, "p");
109 dstruct(s, vhdr, dwBufferLength, "lu");
110 dstruct(s, vhdr, dwBytesUsed, "lu");
111 dstruct(s, vhdr, dwTimeCaptured, "lu");
112 dstruct(s, vhdr, dwUser, "lu");
113 dstruct(s, vhdr, dwFlags, "lu");
114 dstruct(s, vhdr, dwReserved[0], "lu");
115 dstruct(s, vhdr, dwReserved[1], "lu");
116 dstruct(s, vhdr, dwReserved[2], "lu");
117 dstruct(s, vhdr, dwReserved[3], "lu");
118#endif
119}
120
121static void dump_bih(AVFormatContext *s, BITMAPINFOHEADER *bih)
122{
123 av_log(s, AV_LOG_DEBUG, "BITMAPINFOHEADER\n");
124 dstruct(s, bih, biSize, "lu");
125 dstruct(s, bih, biWidth, "ld");
126 dstruct(s, bih, biHeight, "ld");
127 dstruct(s, bih, biPlanes, "d");
128 dstruct(s, bih, biBitCount, "d");
129 dstruct(s, bih, biCompression, "lu");
130 av_log(s, AV_LOG_DEBUG, " biCompression:\t\"%.4s\"\n",
131 (char*) &bih->biCompression);
132 dstruct(s, bih, biSizeImage, "lu");
133 dstruct(s, bih, biXPelsPerMeter, "lu");
134 dstruct(s, bih, biYPelsPerMeter, "lu");
135 dstruct(s, bih, biClrUsed, "lu");
136 dstruct(s, bih, biClrImportant, "lu");
137}
138
139static int shall_we_drop(struct vfw_ctx *ctx)
140{
141 AVFormatContext *s = ctx->s;
142 const uint8_t dropscore[] = {62, 75, 87, 100};
37d3e066 143 const int ndropscores = FF_ARRAY_ELEMS(dropscore);
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144 unsigned int buffer_fullness = (ctx->curbufsize*100)/s->max_picture_buffer;
145
d76c3e07 146 if(dropscore[++ctx->frame_num%ndropscores] <= buffer_fullness) {
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147 av_log(ctx->s, AV_LOG_ERROR,
148 "real-time buffer %d%% full! frame dropped!\n", buffer_fullness);
149 return 1;
150 }
151
152 return 0;
153}
154
155static LRESULT CALLBACK videostream_cb(HWND hwnd, LPVIDEOHDR vdhdr)
156{
157 struct vfw_ctx *ctx;
158 AVPacketList **ppktl, *pktl_next;
159
160 ctx = (struct vfw_ctx *) GetWindowLongPtr(hwnd, GWLP_USERDATA);
161
162 dump_videohdr(ctx->s, vdhdr);
163
164 if(shall_we_drop(ctx))
165 return FALSE;
166
167 WaitForSingleObject(ctx->mutex, INFINITE);
168
169 pktl_next = av_mallocz(sizeof(AVPacketList));
170 if(!pktl_next)
171 goto fail;
172
173 if(av_new_packet(&pktl_next->pkt, vdhdr->dwBytesUsed) < 0) {
174 av_free(pktl_next);
175 goto fail;
176 }
177
178 pktl_next->pkt.pts = vdhdr->dwTimeCaptured;
179 memcpy(pktl_next->pkt.data, vdhdr->lpData, vdhdr->dwBytesUsed);
180
181 for(ppktl = &ctx->pktl ; *ppktl ; ppktl = &(*ppktl)->next);
182 *ppktl = pktl_next;
183
184 ctx->curbufsize += vdhdr->dwBytesUsed;
185
186 SetEvent(ctx->event);
187 ReleaseMutex(ctx->mutex);
188
189 return TRUE;
190fail:
191 ReleaseMutex(ctx->mutex);
192 return FALSE;
193}
194
195static int vfw_read_close(AVFormatContext *s);
196
197static int vfw_read_header(AVFormatContext *s, AVFormatParameters *ap)
198{
199 struct vfw_ctx *ctx = s->priv_data;
200 AVCodecContext *codec;
201 AVStream *st;
202 int devnum;
203 int bisize;
204 BITMAPINFO *bi;
205 CAPTUREPARMS cparms;
206 DWORD biCompression;
207 WORD biBitCount;
208 int width;
209 int height;
210 int ret;
211
212 if(!ap->time_base.den) {
213 av_log(s, AV_LOG_ERROR, "A time base must be specified.\n");
214 return AVERROR_IO;
215 }
216
217 ctx->s = s;
218
219 ctx->hwnd = capCreateCaptureWindow(NULL, 0, 0, 0, 0, 0, HWND_MESSAGE, 0);
220 if(!ctx->hwnd) {
221 av_log(s, AV_LOG_ERROR, "Could not create capture window.\n");
222 return AVERROR_IO;
223 }
224
225 /* If atoi fails, devnum==0 and the default device is used */
226 devnum = atoi(s->filename);
227
228 ret = SendMessage(ctx->hwnd, WM_CAP_DRIVER_CONNECT, devnum, 0);
229 if(!ret) {
230 av_log(s, AV_LOG_ERROR, "Could not connect to device.\n");
231 DestroyWindow(ctx->hwnd);
232 return AVERROR(ENODEV);
233 }
234
235 SendMessage(ctx->hwnd, WM_CAP_SET_OVERLAY, 0, 0);
236 SendMessage(ctx->hwnd, WM_CAP_SET_PREVIEW, 0, 0);
237
238 ret = SendMessage(ctx->hwnd, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0,
239 (LPARAM) videostream_cb);
240 if(!ret) {
241 av_log(s, AV_LOG_ERROR, "Could not set video stream callback.\n");
76c2662b 242 goto fail_io;
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243 }
244
245 SetWindowLongPtr(ctx->hwnd, GWLP_USERDATA, (LONG_PTR) ctx);
246
247 st = av_new_stream(s, 0);
248 if(!st) {
249 vfw_read_close(s);
250 return AVERROR_NOMEM;
251 }
252
253 /* Set video format */
254 bisize = SendMessage(ctx->hwnd, WM_CAP_GET_VIDEOFORMAT, 0, 0);
e4d286f1 255 if(!bisize)
76c2662b 256 goto fail_io;
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257 bi = av_malloc(bisize);
258 if(!bi) {
259 vfw_read_close(s);
260 return AVERROR_NOMEM;
261 }
262 ret = SendMessage(ctx->hwnd, WM_CAP_GET_VIDEOFORMAT, bisize, (LPARAM) bi);
e4d286f1 263 if(!ret)
e110f486 264 goto fail_bi;
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265
266 dump_bih(s, &bi->bmiHeader);
267
268 width = ap->width ? ap->width : bi->bmiHeader.biWidth ;
269 height = ap->height ? ap->height : bi->bmiHeader.biHeight;
270 bi->bmiHeader.biWidth = width ;
271 bi->bmiHeader.biHeight = height;
272
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273#if 0
274 /* For testing yet unsupported compressions
4b1131a0 275 * Copy these values from user-supplied verbose information */
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276 bi->bmiHeader.biWidth = 320;
277 bi->bmiHeader.biHeight = 240;
278 bi->bmiHeader.biPlanes = 1;
279 bi->bmiHeader.biBitCount = 12;
280 bi->bmiHeader.biCompression = MKTAG('I','4','2','0');
281 bi->bmiHeader.biSizeImage = 115200;
282 dump_bih(s, &bi->bmiHeader);
283#endif
284
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285 ret = SendMessage(ctx->hwnd, WM_CAP_SET_VIDEOFORMAT, bisize, (LPARAM) bi);
286 if(!ret) {
287 av_log(s, AV_LOG_ERROR, "Could not set Video Format.\n");
e110f486 288 goto fail_bi;
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289 }
290
291 biCompression = bi->bmiHeader.biCompression;
292 biBitCount = bi->bmiHeader.biBitCount;
293
294 av_free(bi);
295
296 /* Set sequence setup */
297 ret = SendMessage(ctx->hwnd, WM_CAP_GET_SEQUENCE_SETUP, sizeof(cparms),
298 (LPARAM) &cparms);
e4d286f1 299 if(!ret)
76c2662b 300 goto fail_io;
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301
302 dump_captureparms(s, &cparms);
303
304 cparms.fYield = 1; // Spawn a background thread
305 cparms.dwRequestMicroSecPerFrame =
306 (ap->time_base.num*1000000) / ap->time_base.den;
307 cparms.fAbortLeftMouse = 0;
308 cparms.fAbortRightMouse = 0;
309 cparms.fCaptureAudio = 0;
310 cparms.vKeyAbort = 0;
311
312 ret = SendMessage(ctx->hwnd, WM_CAP_SET_SEQUENCE_SETUP, sizeof(cparms),
313 (LPARAM) &cparms);
e4d286f1 314 if(!ret)
76c2662b 315 goto fail_io;
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316
317 codec = st->codec;
318 codec->time_base = ap->time_base;
319 codec->codec_type = CODEC_TYPE_VIDEO;
320 codec->width = width;
321 codec->height = height;
322 codec->codec_id = CODEC_ID_RAWVIDEO;
323 codec->pix_fmt = vfw_pixfmt(biCompression, biBitCount);
324 if(biCompression == BI_RGB)
00adc1e5 325 codec->bits_per_coded_sample = biBitCount;
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326
327 av_set_pts_info(st, 32, 1, 1000);
328
329 if(codec->pix_fmt == -1) {
330 av_log(s, AV_LOG_ERROR, "Unknown compression type."
331 "Please report verbose (-v 99) debug information.\n");
332 vfw_read_close(s);
333 return AVERROR_PATCHWELCOME;
334 }
335
336 ctx->mutex = CreateMutex(NULL, 0, NULL);
337 if(!ctx->mutex) {
338 av_log(s, AV_LOG_ERROR, "Could not create Mutex.\n" );
76c2662b 339 goto fail_io;
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340 }
341 ctx->event = CreateEvent(NULL, 1, 0, NULL);
342 if(!ctx->event) {
343 av_log(s, AV_LOG_ERROR, "Could not create Event.\n" );
76c2662b 344 goto fail_io;
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345 }
346
347 ret = SendMessage(ctx->hwnd, WM_CAP_SEQUENCE_NOFILE, 0, 0);
348 if(!ret) {
349 av_log(s, AV_LOG_ERROR, "Could not start capture sequence.\n" );
76c2662b 350 goto fail_io;
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351 }
352
353 return 0;
76c2662b 354
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355fail_bi:
356 av_free(bi);
357
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358fail_io:
359 vfw_read_close(s);
360 return AVERROR_IO;
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361}
362
363static int vfw_read_packet(AVFormatContext *s, AVPacket *pkt)
364{
365 struct vfw_ctx *ctx = s->priv_data;
366 AVPacketList *pktl = NULL;
367
368 while(!pktl) {
369 WaitForSingleObject(ctx->mutex, INFINITE);
370 pktl = ctx->pktl;
371 if(ctx->pktl) {
372 *pkt = ctx->pktl->pkt;
373 ctx->pktl = ctx->pktl->next;
374 av_free(pktl);
375 }
376 ResetEvent(ctx->event);
377 ReleaseMutex(ctx->mutex);
378 if(!pktl) {
379 if(s->flags & AVFMT_FLAG_NONBLOCK) {
380 return AVERROR(EAGAIN);
381 } else {
382 WaitForSingleObject(ctx->event, INFINITE);
383 }
384 }
385 }
386
387 ctx->curbufsize -= pkt->size;
388
389 return pkt->size;
390}
391
392static int vfw_read_close(AVFormatContext *s)
393{
394 struct vfw_ctx *ctx = s->priv_data;
395
396 if(ctx->hwnd) {
397 SendMessage(ctx->hwnd, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0, 0);
398 SendMessage(ctx->hwnd, WM_CAP_DRIVER_DISCONNECT, 0, 0);
399 DestroyWindow(ctx->hwnd);
400 }
401 if(ctx->mutex)
402 CloseHandle(ctx->mutex);
403 if(ctx->event)
404 CloseHandle(ctx->event);
405
406 return 0;
407}
408
409AVInputFormat vfwcap_demuxer = {
410 "vfwcap",
bde15e74 411 NULL_IF_CONFIG_SMALL("VFW video capture"),
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412 sizeof(struct vfw_ctx),
413 NULL,
414 vfw_read_header,
415 vfw_read_packet,
416 vfw_read_close,
417 .flags = AVFMT_NOFILE,
418};