1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491
|
/*
* VFW capture interface
* Copyright (c) 2006-2008 Ramiro Polla
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/internal.h"
#include "libavutil/log.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "libavformat/internal.h"
// windows.h must no be included before winsock2.h, and libavformat internal
// headers may include winsock2.h
#include <windows.h>
// windows.h needs to be included before vfw.h
#include <vfw.h>
#include "avdevice.h"
/* Some obsolete versions of MinGW32 before 4.0.0 lack this. */
#ifndef HWND_MESSAGE
#define HWND_MESSAGE ((HWND) -3)
#endif
struct vfw_ctx {
const AVClass *class;
HWND hwnd;
HANDLE mutex;
HANDLE event;
AVPacketList *pktl;
unsigned int curbufsize;
unsigned int frame_num;
char *video_size; /**< A string describing video size, set by a private option. */
char *framerate; /**< Set by a private option. */
};
static enum AVPixelFormat vfw_pixfmt(DWORD biCompression, WORD biBitCount)
{
switch(biCompression) {
case MKTAG('U', 'Y', 'V', 'Y'):
return AV_PIX_FMT_UYVY422;
case MKTAG('Y', 'U', 'Y', '2'):
return AV_PIX_FMT_YUYV422;
case MKTAG('I', '4', '2', '0'):
return AV_PIX_FMT_YUV420P;
case BI_RGB:
switch(biBitCount) { /* 1-8 are untested */
case 1:
return AV_PIX_FMT_MONOWHITE;
case 4:
return AV_PIX_FMT_RGB4;
case 8:
return AV_PIX_FMT_RGB8;
case 16:
return AV_PIX_FMT_RGB555;
case 24:
return AV_PIX_FMT_BGR24;
case 32:
return AV_PIX_FMT_RGB32;
}
}
return AV_PIX_FMT_NONE;
}
static enum AVCodecID vfw_codecid(DWORD biCompression)
{
switch(biCompression) {
case MKTAG('d', 'v', 's', 'd'):
return AV_CODEC_ID_DVVIDEO;
case MKTAG('M', 'J', 'P', 'G'):
case MKTAG('m', 'j', 'p', 'g'):
return AV_CODEC_ID_MJPEG;
}
return AV_CODEC_ID_NONE;
}
#define dstruct(pctx, sname, var, type) \
av_log(pctx, AV_LOG_DEBUG, #var":\t%"type"\n", sname->var)
static void dump_captureparms(AVFormatContext *s, CAPTUREPARMS *cparms)
{
av_log(s, AV_LOG_DEBUG, "CAPTUREPARMS\n");
dstruct(s, cparms, dwRequestMicroSecPerFrame, "lu");
dstruct(s, cparms, fMakeUserHitOKToCapture, "d");
dstruct(s, cparms, wPercentDropForError, "u");
dstruct(s, cparms, fYield, "d");
dstruct(s, cparms, dwIndexSize, "lu");
dstruct(s, cparms, wChunkGranularity, "u");
dstruct(s, cparms, fUsingDOSMemory, "d");
dstruct(s, cparms, wNumVideoRequested, "u");
dstruct(s, cparms, fCaptureAudio, "d");
dstruct(s, cparms, wNumAudioRequested, "u");
dstruct(s, cparms, vKeyAbort, "u");
dstruct(s, cparms, fAbortLeftMouse, "d");
dstruct(s, cparms, fAbortRightMouse, "d");
dstruct(s, cparms, fLimitEnabled, "d");
dstruct(s, cparms, wTimeLimit, "u");
dstruct(s, cparms, fMCIControl, "d");
dstruct(s, cparms, fStepMCIDevice, "d");
dstruct(s, cparms, dwMCIStartTime, "lu");
dstruct(s, cparms, dwMCIStopTime, "lu");
dstruct(s, cparms, fStepCaptureAt2x, "d");
dstruct(s, cparms, wStepCaptureAverageFrames, "u");
dstruct(s, cparms, dwAudioBufferSize, "lu");
dstruct(s, cparms, fDisableWriteCache, "d");
dstruct(s, cparms, AVStreamMaster, "u");
}
static void dump_videohdr(AVFormatContext *s, VIDEOHDR *vhdr)
{
#ifdef DEBUG
av_log(s, AV_LOG_DEBUG, "VIDEOHDR\n");
dstruct(s, vhdr, lpData, "p");
dstruct(s, vhdr, dwBufferLength, "lu");
dstruct(s, vhdr, dwBytesUsed, "lu");
dstruct(s, vhdr, dwTimeCaptured, "lu");
dstruct(s, vhdr, dwUser, "lu");
dstruct(s, vhdr, dwFlags, "lu");
dstruct(s, vhdr, dwReserved[0], "lu");
dstruct(s, vhdr, dwReserved[1], "lu");
dstruct(s, vhdr, dwReserved[2], "lu");
dstruct(s, vhdr, dwReserved[3], "lu");
#endif
}
static void dump_bih(AVFormatContext *s, BITMAPINFOHEADER *bih)
{
av_log(s, AV_LOG_DEBUG, "BITMAPINFOHEADER\n");
dstruct(s, bih, biSize, "lu");
dstruct(s, bih, biWidth, "ld");
dstruct(s, bih, biHeight, "ld");
dstruct(s, bih, biPlanes, "d");
dstruct(s, bih, biBitCount, "d");
dstruct(s, bih, biCompression, "lu");
av_log(s, AV_LOG_DEBUG, " biCompression:\t\"%.4s\"\n",
(char*) &bih->biCompression);
dstruct(s, bih, biSizeImage, "lu");
dstruct(s, bih, biXPelsPerMeter, "lu");
dstruct(s, bih, biYPelsPerMeter, "lu");
dstruct(s, bih, biClrUsed, "lu");
dstruct(s, bih, biClrImportant, "lu");
}
static int shall_we_drop(AVFormatContext *s)
{
struct vfw_ctx *ctx = s->priv_data;
static const uint8_t dropscore[4] = { 62, 75, 87, 100 };
const int ndropscores = FF_ARRAY_ELEMS(dropscore);
unsigned int buffer_fullness = (ctx->curbufsize*100)/s->max_picture_buffer;
if(dropscore[++ctx->frame_num%ndropscores] <= buffer_fullness) {
av_log(s, AV_LOG_ERROR,
"real-time buffer %d%% full! frame dropped!\n", buffer_fullness);
return 1;
}
return 0;
}
static LRESULT CALLBACK videostream_cb(HWND hwnd, LPVIDEOHDR vdhdr)
{
AVFormatContext *s;
struct vfw_ctx *ctx;
AVPacketList **ppktl, *pktl_next;
s = (AVFormatContext *) GetWindowLongPtr(hwnd, GWLP_USERDATA);
ctx = s->priv_data;
dump_videohdr(s, vdhdr);
if(shall_we_drop(s))
return FALSE;
WaitForSingleObject(ctx->mutex, INFINITE);
pktl_next = av_mallocz(sizeof(AVPacketList));
if(!pktl_next)
goto fail;
if(av_new_packet(&pktl_next->pkt, vdhdr->dwBytesUsed) < 0) {
av_free(pktl_next);
goto fail;
}
pktl_next->pkt.pts = vdhdr->dwTimeCaptured;
memcpy(pktl_next->pkt.data, vdhdr->lpData, vdhdr->dwBytesUsed);
for(ppktl = &ctx->pktl ; *ppktl ; ppktl = &(*ppktl)->next);
*ppktl = pktl_next;
ctx->curbufsize += vdhdr->dwBytesUsed;
SetEvent(ctx->event);
ReleaseMutex(ctx->mutex);
return TRUE;
fail:
ReleaseMutex(ctx->mutex);
return FALSE;
}
static int vfw_read_close(AVFormatContext *s)
{
struct vfw_ctx *ctx = s->priv_data;
AVPacketList *pktl;
if(ctx->hwnd) {
SendMessage(ctx->hwnd, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0, 0);
SendMessage(ctx->hwnd, WM_CAP_DRIVER_DISCONNECT, 0, 0);
DestroyWindow(ctx->hwnd);
}
if(ctx->mutex)
CloseHandle(ctx->mutex);
if(ctx->event)
CloseHandle(ctx->event);
pktl = ctx->pktl;
while (pktl) {
AVPacketList *next = pktl->next;
av_packet_unref(&pktl->pkt);
av_free(pktl);
pktl = next;
}
return 0;
}
static int vfw_read_header(AVFormatContext *s)
{
struct vfw_ctx *ctx = s->priv_data;
AVCodecParameters *par;
AVStream *st;
int devnum;
int bisize;
BITMAPINFO *bi = NULL;
CAPTUREPARMS cparms;
DWORD biCompression;
WORD biBitCount;
int ret;
AVRational framerate_q;
if (!strcmp(s->filename, "list")) {
for (devnum = 0; devnum <= 9; devnum++) {
char driver_name[256];
char driver_ver[256];
ret = capGetDriverDescription(devnum,
driver_name, sizeof(driver_name),
driver_ver, sizeof(driver_ver));
if (ret) {
av_log(s, AV_LOG_INFO, "Driver %d\n", devnum);
av_log(s, AV_LOG_INFO, " %s\n", driver_name);
av_log(s, AV_LOG_INFO, " %s\n", driver_ver);
}
}
return AVERROR(EIO);
}
ctx->hwnd = capCreateCaptureWindow(NULL, 0, 0, 0, 0, 0, HWND_MESSAGE, 0);
if(!ctx->hwnd) {
av_log(s, AV_LOG_ERROR, "Could not create capture window.\n");
return AVERROR(EIO);
}
/* If atoi fails, devnum==0 and the default device is used */
devnum = atoi(s->filename);
ret = SendMessage(ctx->hwnd, WM_CAP_DRIVER_CONNECT, devnum, 0);
if(!ret) {
av_log(s, AV_LOG_ERROR, "Could not connect to device.\n");
DestroyWindow(ctx->hwnd);
return AVERROR(ENODEV);
}
SendMessage(ctx->hwnd, WM_CAP_SET_OVERLAY, 0, 0);
SendMessage(ctx->hwnd, WM_CAP_SET_PREVIEW, 0, 0);
ret = SendMessage(ctx->hwnd, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0,
(LPARAM) videostream_cb);
if(!ret) {
av_log(s, AV_LOG_ERROR, "Could not set video stream callback.\n");
goto fail;
}
SetWindowLongPtr(ctx->hwnd, GWLP_USERDATA, (LONG_PTR) s);
st = avformat_new_stream(s, NULL);
if(!st) {
vfw_read_close(s);
return AVERROR(ENOMEM);
}
/* Set video format */
bisize = SendMessage(ctx->hwnd, WM_CAP_GET_VIDEOFORMAT, 0, 0);
if(!bisize)
goto fail;
bi = av_malloc(bisize);
if(!bi) {
vfw_read_close(s);
return AVERROR(ENOMEM);
}
ret = SendMessage(ctx->hwnd, WM_CAP_GET_VIDEOFORMAT, bisize, (LPARAM) bi);
if(!ret)
goto fail;
dump_bih(s, &bi->bmiHeader);
ret = av_parse_video_rate(&framerate_q, ctx->framerate);
if (ret < 0) {
av_log(s, AV_LOG_ERROR, "Could not parse framerate '%s'.\n", ctx->framerate);
goto fail;
}
if (ctx->video_size) {
ret = av_parse_video_size(&bi->bmiHeader.biWidth, &bi->bmiHeader.biHeight, ctx->video_size);
if (ret < 0) {
av_log(s, AV_LOG_ERROR, "Couldn't parse video size.\n");
goto fail;
}
}
if (0) {
/* For testing yet unsupported compressions
* Copy these values from user-supplied verbose information */
bi->bmiHeader.biWidth = 320;
bi->bmiHeader.biHeight = 240;
bi->bmiHeader.biPlanes = 1;
bi->bmiHeader.biBitCount = 12;
bi->bmiHeader.biCompression = MKTAG('I','4','2','0');
bi->bmiHeader.biSizeImage = 115200;
dump_bih(s, &bi->bmiHeader);
}
ret = SendMessage(ctx->hwnd, WM_CAP_SET_VIDEOFORMAT, bisize, (LPARAM) bi);
if(!ret) {
av_log(s, AV_LOG_ERROR, "Could not set Video Format.\n");
goto fail;
}
biCompression = bi->bmiHeader.biCompression;
biBitCount = bi->bmiHeader.biBitCount;
/* Set sequence setup */
ret = SendMessage(ctx->hwnd, WM_CAP_GET_SEQUENCE_SETUP, sizeof(cparms),
(LPARAM) &cparms);
if(!ret)
goto fail;
dump_captureparms(s, &cparms);
cparms.fYield = 1; // Spawn a background thread
cparms.dwRequestMicroSecPerFrame =
(framerate_q.den*1000000) / framerate_q.num;
cparms.fAbortLeftMouse = 0;
cparms.fAbortRightMouse = 0;
cparms.fCaptureAudio = 0;
cparms.vKeyAbort = 0;
ret = SendMessage(ctx->hwnd, WM_CAP_SET_SEQUENCE_SETUP, sizeof(cparms),
(LPARAM) &cparms);
if(!ret)
goto fail;
st->avg_frame_rate = framerate_q;
par = st->codecpar;
par->codec_type = AVMEDIA_TYPE_VIDEO;
par->width = bi->bmiHeader.biWidth;
par->height = bi->bmiHeader.biHeight;
par->format = vfw_pixfmt(biCompression, biBitCount);
if (par->format == AV_PIX_FMT_NONE) {
par->codec_id = vfw_codecid(biCompression);
if (par->codec_id == AV_CODEC_ID_NONE) {
av_log(s, AV_LOG_ERROR, "Unknown compression type. "
"Please report verbose (-v 9) debug information.\n");
vfw_read_close(s);
return AVERROR_PATCHWELCOME;
}
par->bits_per_coded_sample = biBitCount;
} else {
par->codec_id = AV_CODEC_ID_RAWVIDEO;
if(biCompression == BI_RGB) {
par->bits_per_coded_sample = biBitCount;
par->extradata = av_malloc(9 + AV_INPUT_BUFFER_PADDING_SIZE);
if (par->extradata) {
par->extradata_size = 9;
memcpy(par->extradata, "BottomUp", 9);
}
}
}
av_freep(&bi);
avpriv_set_pts_info(st, 32, 1, 1000);
ctx->mutex = CreateMutex(NULL, 0, NULL);
if(!ctx->mutex) {
av_log(s, AV_LOG_ERROR, "Could not create Mutex.\n" );
goto fail;
}
ctx->event = CreateEvent(NULL, 1, 0, NULL);
if(!ctx->event) {
av_log(s, AV_LOG_ERROR, "Could not create Event.\n" );
goto fail;
}
ret = SendMessage(ctx->hwnd, WM_CAP_SEQUENCE_NOFILE, 0, 0);
if(!ret) {
av_log(s, AV_LOG_ERROR, "Could not start capture sequence.\n" );
goto fail;
}
return 0;
fail:
av_freep(&bi);
vfw_read_close(s);
return AVERROR(EIO);
}
static int vfw_read_packet(AVFormatContext *s, AVPacket *pkt)
{
struct vfw_ctx *ctx = s->priv_data;
AVPacketList *pktl = NULL;
while(!pktl) {
WaitForSingleObject(ctx->mutex, INFINITE);
pktl = ctx->pktl;
if(ctx->pktl) {
*pkt = ctx->pktl->pkt;
ctx->pktl = ctx->pktl->next;
av_free(pktl);
}
ResetEvent(ctx->event);
ReleaseMutex(ctx->mutex);
if(!pktl) {
if(s->flags & AVFMT_FLAG_NONBLOCK) {
return AVERROR(EAGAIN);
} else {
WaitForSingleObject(ctx->event, INFINITE);
}
}
}
ctx->curbufsize -= pkt->size;
return pkt->size;
}
#define OFFSET(x) offsetof(struct vfw_ctx, x)
#define DEC AV_OPT_FLAG_DECODING_PARAM
static const AVOption options[] = {
{ "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
{ "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = "ntsc"}, 0, 0, DEC },
{ NULL },
};
static const AVClass vfw_class = {
.class_name = "VFW indev",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
.category = AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT
};
AVInputFormat ff_vfwcap_demuxer = {
.name = "vfwcap",
.long_name = NULL_IF_CONFIG_SMALL("VfW video capture"),
.priv_data_size = sizeof(struct vfw_ctx),
.read_header = vfw_read_header,
.read_packet = vfw_read_packet,
.read_close = vfw_read_close,
.flags = AVFMT_NOFILE,
.priv_class = &vfw_class,
};
|