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ffmpeg / libavdevice / vfwcap.c @ 4f54d924

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1 c2345207 Ramiro Polla
/*
2
 * VFW capture interface
3 406792e7 Diego Biurrun
 * Copyright (c) 2006-2008 Ramiro Polla
4 c2345207 Ramiro Polla
 *
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 245976da Diego Biurrun
#include "libavformat/avformat.h"
23 c2345207 Ramiro Polla
#include <windows.h>
24 420755dd kemuri
#include <vfw.h>
25 c2345207 Ramiro Polla
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 e24080f0 Ramiro Polla
    case MKTAG('U', 'Y', 'V', 'Y'):
49
        return PIX_FMT_UYVY422;
50 c2345207 Ramiro Polla
    case MKTAG('Y', 'U', 'Y', '2'):
51
        return PIX_FMT_YUYV422;
52 23ef6da8 Ramiro Polla
    case MKTAG('I', '4', '2', '0'):
53
        return PIX_FMT_YUV420P;
54 c2345207 Ramiro Polla
    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 d40b45e8 Ramiro Polla
    return PIX_FMT_NONE;
71 c2345207 Ramiro Polla
}
72
73 1c0b9215 Ramiro Polla
static enum CodecID vfw_codecid(DWORD biCompression)
74
{
75
    switch(biCompression) {
76
    case MKTAG('d', 'v', 's', 'd'):
77
        return CODEC_ID_DVVIDEO;
78 d7a4961e Nash Tsai
    case MKTAG('M', 'J', 'P', 'G'):
79
    case MKTAG('m', 'j', 'p', 'g'):
80
        return CODEC_ID_MJPEG;
81 1c0b9215 Ramiro Polla
    }
82
    return CODEC_ID_NONE;
83
}
84
85 c2345207 Ramiro Polla
#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 ce03ed4d Ramiro Polla
static int shall_we_drop(AVFormatContext *s)
153 c2345207 Ramiro Polla
{
154 ce03ed4d Ramiro Polla
    struct vfw_ctx *ctx = s->priv_data;
155 c2345207 Ramiro Polla
    const uint8_t dropscore[] = {62, 75, 87, 100};
156 37d3e066 Aurelien Jacobs
    const int ndropscores = FF_ARRAY_ELEMS(dropscore);
157 c2345207 Ramiro Polla
    unsigned int buffer_fullness = (ctx->curbufsize*100)/s->max_picture_buffer;
158
159 d76c3e07 Ramiro Polla
    if(dropscore[++ctx->frame_num%ndropscores] <= buffer_fullness) {
160 ce03ed4d Ramiro Polla
        av_log(s, AV_LOG_ERROR,
161 c2345207 Ramiro Polla
              "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 ce03ed4d Ramiro Polla
    AVFormatContext *s;
171 c2345207 Ramiro Polla
    struct vfw_ctx *ctx;
172
    AVPacketList **ppktl, *pktl_next;
173
174 ce03ed4d Ramiro Polla
    s = (AVFormatContext *) GetWindowLongPtr(hwnd, GWLP_USERDATA);
175
    ctx = s->priv_data;
176 c2345207 Ramiro Polla
177 ce03ed4d Ramiro Polla
    dump_videohdr(s, vdhdr);
178 c2345207 Ramiro Polla
179 ce03ed4d Ramiro Polla
    if(shall_we_drop(s))
180 c2345207 Ramiro Polla
        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 c959c6ee Diego Biurrun
static int vfw_read_close(AVFormatContext *s)
211
{
212
    struct vfw_ctx *ctx = s->priv_data;
213 ad8eede7 Ramiro Polla
    AVPacketList *pktl;
214 c959c6ee Diego Biurrun
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 ad8eede7 Ramiro Polla
    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 c959c6ee Diego Biurrun
    return 0;
234
}
235 c2345207 Ramiro Polla
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 5ae092ee Stefano Sabatini
        return AVERROR(EIO);
254 c2345207 Ramiro Polla
    }
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 5ae092ee Stefano Sabatini
        return AVERROR(EIO);
260 c2345207 Ramiro Polla
    }
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 76c2662b Ramiro Polla
        goto fail_io;
280 c2345207 Ramiro Polla
    }
281
282 ce03ed4d Ramiro Polla
    SetWindowLongPtr(ctx->hwnd, GWLP_USERDATA, (LONG_PTR) s);
283 c2345207 Ramiro Polla
284
    st = av_new_stream(s, 0);
285
    if(!st) {
286
        vfw_read_close(s);
287 2874c81c Stefano Sabatini
        return AVERROR(ENOMEM);
288 c2345207 Ramiro Polla
    }
289
290
    /* Set video format */
291
    bisize = SendMessage(ctx->hwnd, WM_CAP_GET_VIDEOFORMAT, 0, 0);
292 e4d286f1 Ramiro Polla
    if(!bisize)
293 76c2662b Ramiro Polla
        goto fail_io;
294 c2345207 Ramiro Polla
    bi = av_malloc(bisize);
295
    if(!bi) {
296
        vfw_read_close(s);
297 2874c81c Stefano Sabatini
        return AVERROR(ENOMEM);
298 c2345207 Ramiro Polla
    }
299
    ret = SendMessage(ctx->hwnd, WM_CAP_GET_VIDEOFORMAT, bisize, (LPARAM) bi);
300 e4d286f1 Ramiro Polla
    if(!ret)
301 e110f486 Ramiro Polla
        goto fail_bi;
302 c2345207 Ramiro Polla
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 a9decf00 Ramiro Polla
    if (0) {
311 315fa33f Ramiro Polla
        /* 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 a9decf00 Ramiro Polla
    }
321 cada0327 Ramiro Polla
322 c2345207 Ramiro Polla
    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 e110f486 Ramiro Polla
        goto fail_bi;
326 c2345207 Ramiro Polla
    }
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 e4d286f1 Ramiro Polla
    if(!ret)
337 76c2662b Ramiro Polla
        goto fail_io;
338 c2345207 Ramiro Polla
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 e4d286f1 Ramiro Polla
    if(!ret)
352 76c2662b Ramiro Polla
        goto fail_io;
353 c2345207 Ramiro Polla
354
    codec = st->codec;
355
    codec->time_base = ap->time_base;
356 72415b2a Stefano Sabatini
    codec->codec_type = AVMEDIA_TYPE_VIDEO;
357 c2345207 Ramiro Polla
    codec->width = width;
358
    codec->height = height;
359
    codec->pix_fmt = vfw_pixfmt(biCompression, biBitCount);
360 d40b45e8 Ramiro Polla
    if(codec->pix_fmt == PIX_FMT_NONE) {
361 1c0b9215 Ramiro Polla
        codec->codec_id = vfw_codecid(biCompression);
362
        if(codec->codec_id == CODEC_ID_NONE) {
363 155b0f00 Ramiro Polla
            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 1c0b9215 Ramiro Polla
        }
368
        codec->bits_per_coded_sample = biBitCount;
369 155b0f00 Ramiro Polla
    } else {
370
        codec->codec_id = CODEC_ID_RAWVIDEO;
371
        if(biCompression == BI_RGB)
372
            codec->bits_per_coded_sample = biBitCount;
373 1c0b9215 Ramiro Polla
    }
374 42477de5 Ramiro Polla
375
    av_set_pts_info(st, 32, 1, 1000);
376 c2345207 Ramiro Polla
377
    ctx->mutex = CreateMutex(NULL, 0, NULL);
378
    if(!ctx->mutex) {
379
        av_log(s, AV_LOG_ERROR, "Could not create Mutex.\n" );
380 76c2662b Ramiro Polla
        goto fail_io;
381 c2345207 Ramiro Polla
    }
382
    ctx->event = CreateEvent(NULL, 1, 0, NULL);
383
    if(!ctx->event) {
384
        av_log(s, AV_LOG_ERROR, "Could not create Event.\n" );
385 76c2662b Ramiro Polla
        goto fail_io;
386 c2345207 Ramiro Polla
    }
387
388
    ret = SendMessage(ctx->hwnd, WM_CAP_SEQUENCE_NOFILE, 0, 0);
389
    if(!ret) {
390
        av_log(s, AV_LOG_ERROR, "Could not start capture sequence.\n" );
391 76c2662b Ramiro Polla
        goto fail_io;
392 c2345207 Ramiro Polla
    }
393
394
    return 0;
395 76c2662b Ramiro Polla
396 e110f486 Ramiro Polla
fail_bi:
397
    av_free(bi);
398
399 76c2662b Ramiro Polla
fail_io:
400
    vfw_read_close(s);
401 5ae092ee Stefano Sabatini
    return AVERROR(EIO);
402 c2345207 Ramiro Polla
}
403
404
static int vfw_read_packet(AVFormatContext *s, AVPacket *pkt)
405
{
406
    struct vfw_ctx *ctx = s->priv_data;
407
    AVPacketList *pktl = NULL;
408
409
    while(!pktl) {
410
        WaitForSingleObject(ctx->mutex, INFINITE);
411
        pktl = ctx->pktl;
412
        if(ctx->pktl) {
413
            *pkt = ctx->pktl->pkt;
414
            ctx->pktl = ctx->pktl->next;
415
            av_free(pktl);
416
        }
417
        ResetEvent(ctx->event);
418
        ReleaseMutex(ctx->mutex);
419
        if(!pktl) {
420
            if(s->flags & AVFMT_FLAG_NONBLOCK) {
421
                return AVERROR(EAGAIN);
422
            } else {
423
                WaitForSingleObject(ctx->event, INFINITE);
424
            }
425
        }
426
    }
427
428
    ctx->curbufsize -= pkt->size;
429
430
    return pkt->size;
431
}
432
433
AVInputFormat vfwcap_demuxer = {
434
    "vfwcap",
435 bde15e74 Stefano Sabatini
    NULL_IF_CONFIG_SMALL("VFW video capture"),
436 c2345207 Ramiro Polla
    sizeof(struct vfw_ctx),
437
    NULL,
438
    vfw_read_header,
439
    vfw_read_packet,
440
    vfw_read_close,
441
    .flags = AVFMT_NOFILE,
442
};