vhook/watermark.c

   1 /*
   2  * Watermark Hook
   3  * Copyright (c) 2005 Marcus Engene myfirstname(at)mylastname.se
   4  *
   5  * flags to watermark:
   6  *  -m nbr = nbr is 0..1. 0 is the default mode, see below.
   7  *  -t nbr = nbr is six digit hex. Threshold.
   8  *  -f file = File is the filename of watermark image. You must specify this!
   9  *
  10  * MODE 0:
  11  * The watermarkpicture works like this. (Assuming colorintencities 0..0xff)
  12  * Per color do this:
  13  * If mask color is 0x80, no change to original frame.
  14  * If mask color is < 0x80 the abs difference is subtracted from frame. If
  15  * result < 0, result = 0
  16  * If mask color is > 0x80 the abs difference is added to frame. If result
  17  * > 0xff, result = 0xff
  18  *
  19  * You can override the 0x80 level with the -t flag. Eg if threshold is 000000
  20  * the color values of watermark is added to destination.
  21  *
  22  * This way a mask that is visible both in light pictures and in dark can be
  23  * made (fex by using a picture generated by gimp and the bump map tool).
  24  *
  25  * An example watermark file is at
  26  * http://engene.se/ffmpeg_watermark.gif
  27  *
  28  * MODE 1:
  29  * Per color do this:
  30  * If mask color > threshold color, watermark pixel is going to be used.
  31  *
  32  * Example usage:
  33  *  ffmpeg -i infile -vhook '/path/watermark.so -f wm.gif' -an out.mov
  34  *  ffmpeg -i infile -vhook '/path/watermark.so -f wm.gif -m 1 -t 222222' -an out.mov
  35  *
  36  * Note that the entire vhook argument is encapsulated in ''. This
  37  * way, arguments to the vhook won't be mixed up with those to ffmpeg.
  38  *
  39  * This library is free software; you can redistribute it and/or
  40  * modify it under the terms of the GNU Lesser General Public
  41  * License as published by the Free Software Foundation; either
  42  * version 2 of the License, or (at your option) any later version.
  43  *
  44  * This library is distributed in the hope that it will be useful,
  45  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  46  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  47  * Lesser General Public License for more details.
  48  *
  49  * You should have received a copy of the GNU Lesser General Public
  50  * License along with this library; if not, write to the Free Software
  51  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  52  */
  53
  54 #include <stdlib.h>
  55 //#include <fcntl.h>
  56 #include <unistd.h>
  57 #include <stdarg.h>
  58
  59 #include "common.h"
  60 #include "avformat.h"
  61
  62 #include "framehook.h"
  63 #include "cmdutils.h"
  64
  65 typedef struct {
  66     char            filename[2000];
  67     int             x_size;
  68     int             y_size;
  69
  70     /* get_watermark_picture() variables */
  71     AVFormatContext *pFormatCtx;
  72     const char     *p_ext;
  73     int             videoStream;
  74     int             frameFinished;
  75     AVCodecContext *pCodecCtx;
  76     AVCodec        *pCodec;
  77     AVFrame        *pFrame;
  78     AVPacket        packet;
  79     int             numBytes;
  80     uint8_t        *buffer;
  81     int             i;
  82     AVInputFormat  *file_iformat;
  83     AVStream       *st;
  84     int             is_done;
  85     AVFrame        *pFrameRGB;
  86     int             thrR;
  87     int             thrG;
  88     int             thrB;
  89     int             mode;
  90 } ContextInfo;
  91
  92 int get_watermark_picture(ContextInfo *ci, int cleanup);
  93
  94
  95 /****************************************************************************
  96  *
  97  ****************************************************************************/
  98 void Release(void *ctx)
  99 {
 100     ContextInfo *ci;
 101     ci = (ContextInfo *) ctx;
 102
 103     if (ci) get_watermark_picture(ci, 1);
 104
 105     if (ctx)
 106         av_free(ctx);
 107 }
 108
 109
 110 /****************************************************************************
 111  *
 112  ****************************************************************************/
 113 int Configure(void **ctxp, int argc, char *argv[])
 114 {
 115     ContextInfo *ci;
 116     int c;
 117     int tmp = 0;
 118
 119     if (0 == (*ctxp = av_mallocz(sizeof(ContextInfo)))) return -1;
 120     ci = (ContextInfo *) *ctxp;
 121
 122     optind = 1;
 123
 124     // Struct is mallocz:ed so no need to reset.
 125     ci->thrR = 0x80;
 126     ci->thrG = 0x80;
 127     ci->thrB = 0x80;
 128
 129     while ((c = getopt(argc, argv, "f:m:t:")) > 0) {
 130         switch (c) {
 131             case 'f':
 132                 strncpy(ci->filename, optarg, 1999);
 133                 ci->filename[1999] = 0;
 134                 break;
 135             case 'm':
 136                 ci->mode = atoi(optarg);
 137                 break;
 138             case 't':
 139                 if (1 != sscanf(optarg, "%x", &tmp)) {
 140                     av_log(NULL, AV_LOG_ERROR, "Watermark: argument to -t must be a 6 digit hex number\n");
 141                     return -1;
 142                 }
 143                 ci->thrR = (tmp >> 16) & 0xff;
 144                 ci->thrG = (tmp >> 8) & 0xff;
 145                 ci->thrB = (tmp >> 0) & 0xff;
 146                 break;
 147             default:
 148                 av_log(NULL, AV_LOG_ERROR, "Watermark: Unrecognized argument '%s'\n", argv[optind]);
 149                 return -1;
 150         }
 151     }
 152
 153     //
 154     if (0 == ci->filename[0]) {
 155         av_log(NULL, AV_LOG_ERROR, "Watermark: There is no filename specified.\n");
 156         return -1;
 157     }
 158
 159     av_register_all();
 160     return get_watermark_picture(ci, 0);
 161 }
 162
 163
 164 /****************************************************************************
 165  * For mode 0 (the original one)
 166  ****************************************************************************/
 167 static void Process0(void *ctx,
 168               AVPicture *picture,
 169               enum PixelFormat pix_fmt,
 170               int src_width,
 171               int src_height,
 172               int64_t pts)
 173 {
 174     ContextInfo *ci = (ContextInfo *) ctx;
 175     char *buf = 0;
 176     AVPicture picture1;
 177     AVPicture *pict = picture;
 178
 179     AVFrame *pFrameRGB;
 180     int xm_size;
 181     int ym_size;
 182
 183     int x;
 184     int y;
 185     int offs, offsm;
 186     int mpoffs;
 187     uint32_t *p_pixel = 0;
 188     uint32_t pixel_meck;
 189     uint32_t pixel;
 190     uint32_t pixelm;
 191     int tmp;
 192     int thrR = ci->thrR;
 193     int thrG = ci->thrG;
 194     int thrB = ci->thrB;
 195
 196     if (pix_fmt != PIX_FMT_RGBA32) {
 197         int size;
 198
 199         size = avpicture_get_size(PIX_FMT_RGBA32, src_width, src_height);
 200         buf = av_malloc(size);
 201
 202         avpicture_fill(&picture1, buf, PIX_FMT_RGBA32, src_width, src_height);
 203         if (img_convert(&picture1, PIX_FMT_RGBA32,
 204                         picture, pix_fmt, src_width, src_height) < 0) {
 205             av_free(buf);
 206             return;
 207         }
 208         pict = &picture1;
 209     }
 210
 211     /* Insert filter code here */ /* ok */
 212
 213     // Get me next frame
 214     if (0 > get_watermark_picture(ci, 0)) {
 215         return;
 216     }
 217     // These are the three original static variables in the ffmpeg hack.
 218     pFrameRGB = ci->pFrameRGB;
 219     xm_size = ci->x_size;
 220     ym_size = ci->y_size;
 221
 222     // I'll do the *4 => <<2 crap later. Most compilers understand that anyway.
 223     // According to avcodec.h PIX_FMT_RGBA32 is handled in endian specific manner.
 224     for (y=0; y<src_height; y++) {
 225         offs = y * (src_width * 4);
 226         offsm = (((y * ym_size) / src_height) * 4) * xm_size; // offsm first in maskline. byteoffs!
 227         for (x=0; x<src_width; x++) {
 228             mpoffs = offsm + (((x * xm_size) / src_width) * 4);
 229             p_pixel = (uint32_t *)&((pFrameRGB->data[0])[mpoffs]);
 230             pixelm = *p_pixel;
 231             p_pixel = (uint32_t *)&((pict->data[0])[offs]);
 232             pixel = *p_pixel;
 233 //          pixelm = *((uint32_t *)&(pFrameRGB->data[mpoffs]));
 234             pixel_meck = pixel & 0xff000000;
 235
 236             // R
 237             tmp = (int)((pixel >> 16) & 0xff) + (int)((pixelm >> 16) & 0xff) - thrR;
 238             if (tmp > 255) tmp = 255;
 239             if (tmp < 0) tmp = 0;
 240             pixel_meck |= (tmp << 16) & 0xff0000;
 241             // G
 242             tmp = (int)((pixel >> 8) & 0xff) + (int)((pixelm >> 8) & 0xff) - thrG;
 243             if (tmp > 255) tmp = 255;
 244             if (tmp < 0) tmp = 0;
 245             pixel_meck |= (tmp << 8) & 0xff00;
 246             // B
 247             tmp = (int)((pixel >> 0) & 0xff) + (int)((pixelm >> 0) & 0xff) - thrB;
 248             if (tmp > 255) tmp = 255;
 249             if (tmp < 0) tmp = 0;
 250             pixel_meck |= (tmp << 0) & 0xff;
 251
 252
 253             // test:
 254             //pixel_meck = pixel & 0xff000000;
 255             //pixel_meck |= (pixelm & 0x00ffffff);
 256
 257             *p_pixel = pixel_meck;
 258
 259             offs += 4;
 260         } // foreach X
 261     } // foreach Y
 262
 263
 264
 265
 266     if (pix_fmt != PIX_FMT_RGBA32) {
 267         if (img_convert(picture, pix_fmt,
 268                         &picture1, PIX_FMT_RGBA32, src_width, src_height) < 0) {
 269         }
 270     }
 271
 272     av_free(buf);
 273 }
 274
 275
 276 /****************************************************************************
 277  * For mode 1 (the original one)
 278  ****************************************************************************/
 279 static void Process1(void *ctx,
 280               AVPicture *picture,
 281               enum PixelFormat pix_fmt,
 282               int src_width,
 283               int src_height,
 284               int64_t pts)
 285 {
 286     ContextInfo *ci = (ContextInfo *) ctx;
 287     char *buf = 0;
 288     AVPicture picture1;
 289     AVPicture *pict = picture;
 290
 291     AVFrame *pFrameRGB;
 292     int xm_size;
 293     int ym_size;
 294
 295     int x;
 296     int y;
 297     int offs, offsm;
 298     int mpoffs;
 299     uint32_t *p_pixel = 0;
 300     uint32_t pixel;
 301     uint32_t pixelm;
 302
 303     if (pix_fmt != PIX_FMT_RGBA32) {
 304         int size;
 305
 306         size = avpicture_get_size(PIX_FMT_RGBA32, src_width, src_height);
 307         buf = av_malloc(size);
 308
 309         avpicture_fill(&picture1, buf, PIX_FMT_RGBA32, src_width, src_height);
 310         if (img_convert(&picture1, PIX_FMT_RGBA32,
 311                         picture, pix_fmt, src_width, src_height) < 0) {
 312             av_free(buf);
 313             return;
 314         }
 315         pict = &picture1;
 316     }
 317
 318     /* Insert filter code here */ /* ok */
 319
 320     // Get me next frame
 321     if (0 > get_watermark_picture(ci, 0)) {
 322         return;
 323     }
 324     // These are the three original static variables in the ffmpeg hack.
 325     pFrameRGB = ci->pFrameRGB;
 326     xm_size = ci->x_size;
 327     ym_size = ci->y_size;
 328
 329     // I'll do the *4 => <<2 crap later. Most compilers understand that anyway.
 330     // According to avcodec.h PIX_FMT_RGBA32 is handled in endian specific manner.
 331     for (y=0; y<src_height; y++) {
 332         offs = y * (src_width * 4);
 333         offsm = (((y * ym_size) / src_height) * 4) * xm_size; // offsm first in maskline. byteoffs!
 334         for (x=0; x<src_width; x++) {
 335             mpoffs = offsm + (((x * xm_size) / src_width) * 4);
 336             p_pixel = (uint32_t *)&((pFrameRGB->data[0])[mpoffs]);
 337             pixelm = *p_pixel; /* watermark pixel */
 338             p_pixel = (uint32_t *)&((pict->data[0])[offs]);
 339             pixel = *p_pixel;
 340
 341             if (((pixelm >> 16) & 0xff) > ci->thrR ||
 342                 ((pixelm >>  8) & 0xff) > ci->thrG ||
 343                 ((pixelm >>  0) & 0xff) > ci->thrB)
 344             {
 345                 *p_pixel = pixelm;
 346             } else {
 347                 *p_pixel = pixel;
 348             }
 349             offs += 4;
 350         } // foreach X
 351     } // foreach Y
 352
 353     if (pix_fmt != PIX_FMT_RGBA32) {
 354         if (img_convert(picture, pix_fmt,
 355                         &picture1, PIX_FMT_RGBA32, src_width, src_height) < 0) {
 356         }
 357     }
 358
 359     av_free(buf);
 360 }
 361
 362
 363 /****************************************************************************
 364  * This is the function ffmpeg.c callbacks.
 365  ****************************************************************************/
 366 void Process(void *ctx,
 367              AVPicture *picture,
 368              enum PixelFormat pix_fmt,
 369              int src_width,
 370              int src_height,
 371              int64_t pts)
 372 {
 373     ContextInfo *ci = (ContextInfo *) ctx;
 374     if (1 == ci->mode) {
 375         return Process1(ctx, picture, pix_fmt, src_width, src_height, pts);
 376     } else {
 377         return Process0(ctx, picture, pix_fmt, src_width, src_height, pts);
 378     }
 379 }
 380
 381
 382 /****************************************************************************
 383  * When cleanup == 0, we try to get the next frame. If no next frame, nothing
 384  * is done.
 385  *
 386  * This code follows the example on
 387  * http://www.inb.uni-luebeck.de/~boehme/using_libavcodec.html
 388  *
 389  * 0 = ok, -1 = error
 390  ****************************************************************************/
 391 int get_watermark_picture(ContextInfo *ci, int cleanup)
 392 {
 393     if (1 == ci->is_done && 0 == cleanup) return 0;
 394
 395     // Yes, *pFrameRGB arguments must be null the first time otherwise it's not good..
 396     // This block is only executed the first time we enter this function.
 397     if (0 == ci->pFrameRGB &&
 398         0 == cleanup)
 399     {
 400
 401         /*
 402          * The last three parameters specify the file format, buffer size and format
 403          * parameters; by simply specifying NULL or 0 we ask libavformat to auto-detect
 404          * the format and use a default buffer size. (Didn't work!)
 405          */
 406         if (av_open_input_file(&ci->pFormatCtx, ci->filename, NULL, 0, NULL) != 0) {
 407
 408             // Martin says this should not be necessary but it failed for me sending in
 409             // NULL instead of file_iformat to av_open_input_file()
 410             ci->i = strlen(ci->filename);
 411             if (0 == ci->i) {
 412                 av_log(NULL, AV_LOG_ERROR, "get_watermark_picture() No filename to watermark vhook\n");
 413                 return -1;
 414             }
 415             while (ci->i > 0) {
 416                 if (ci->filename[ci->i] == '.') {
 417                     ci->i++;
 418                     break;
 419                 }
 420                 ci->i--;
 421             }
 422                ci->p_ext = &(ci->filename[ci->i]);
 423             ci->file_iformat = av_find_input_format (ci->p_ext);
 424             if (0 == ci->file_iformat) {
 425                 av_log(NULL, AV_LOG_ERROR, "get_watermark_picture() Really failed to find iformat [%s]\n", ci->p_ext);
 426                 return -1;
 427             }
 428             // now continues the Martin template.
 429
 430             if (av_open_input_file(&ci->pFormatCtx, ci->filename, ci->file_iformat, 0, NULL)!=0) {
 431                 av_log(NULL, AV_LOG_ERROR, "get_watermark_picture() Failed to open input file [%s]\n", ci->filename);
 432                 return -1;
 433             }
 434         }
 435
 436         /*
 437          * This fills the streams field of the AVFormatContext with valid information.
 438          */
 439         if(av_find_stream_info(ci->pFormatCtx)<0) {
 440             av_log(NULL, AV_LOG_ERROR, "get_watermark_picture() Failed to find stream info\n");
 441             return -1;
 442         }
 443
 444         /*
 445          * As mentioned in the introduction, we'll handle only video streams, not audio
 446          * streams. To make things nice and easy, we simply use the first video stream we
 447          * find.
 448          */
 449         ci->videoStream=-1;
 450         for(ci->i = 0; ci->i < ci->pFormatCtx->nb_streams; ci->i++)
 451             if(ci->pFormatCtx->streams[ci->i]->codec->codec_type==CODEC_TYPE_VIDEO)
 452             {
 453                 ci->videoStream = ci->i;
 454                 break;
 455             }
 456         if(ci->videoStream == -1) {
 457             av_log(NULL, AV_LOG_ERROR, "get_watermark_picture() Failed to find any video stream\n");
 458             return -1;
 459         }
 460
 461         ci->st = ci->pFormatCtx->streams[ci->videoStream];
 462         ci->x_size = ci->st->codec->width;
 463         ci->y_size = ci->st->codec->height;
 464
 465         // Get a pointer to the codec context for the video stream
 466         ci->pCodecCtx = ci->pFormatCtx->streams[ci->videoStream]->codec;
 467
 468
 469         /*
 470          * OK, so now we've got a pointer to the so-called codec context for our video
 471          * stream, but we still have to find the actual codec and open it.
 472          */
 473         // Find the decoder for the video stream
 474         ci->pCodec = avcodec_find_decoder(ci->pCodecCtx->codec_id);
 475         if(ci->pCodec == NULL) {
 476             av_log(NULL, AV_LOG_ERROR, "get_watermark_picture() Failed to find any codec\n");
 477             return -1;
 478         }
 479
 480         // Inform the codec that we can handle truncated bitstreams -- i.e.,
 481         // bitstreams where frame boundaries can fall in the middle of packets
 482         if (ci->pCodec->capabilities & CODEC_CAP_TRUNCATED)
 483             ci->pCodecCtx->flags|=CODEC_FLAG_TRUNCATED;
 484
 485         // Open codec
 486         if(avcodec_open(ci->pCodecCtx, ci->pCodec)<0) {
 487             av_log(NULL, AV_LOG_ERROR, "get_watermark_picture() Failed to open codec\n");
 488             return -1;
 489         }
 490
 491         // Hack to correct wrong frame rates that seem to be generated by some
 492         // codecs
 493         if (ci->pCodecCtx->time_base.den>1000 && ci->pCodecCtx->time_base.num==1)
 494             ci->pCodecCtx->time_base.num=1000;
 495
 496         /*
 497          * Allocate a video frame to store the decoded images in.
 498          */
 499         ci->pFrame = avcodec_alloc_frame();
 500
 501
 502         /*
 503          * The RGB image pFrameRGB (of type AVFrame *) is allocated like this:
 504          */
 505         // Allocate an AVFrame structure
 506         ci->pFrameRGB=avcodec_alloc_frame();
 507         if(ci->pFrameRGB==NULL) {
 508             av_log(NULL, AV_LOG_ERROR, "get_watermark_picture() Failed to alloc pFrameRGB\n");
 509             return -1;
 510         }
 511
 512         // Determine required buffer size and allocate buffer
 513         ci->numBytes = avpicture_get_size(PIX_FMT_RGBA32, ci->pCodecCtx->width,
 514             ci->pCodecCtx->height);
 515         ci->buffer = av_malloc(ci->numBytes);
 516
 517         // Assign appropriate parts of buffer to image planes in pFrameRGB
 518         avpicture_fill((AVPicture *)ci->pFrameRGB, ci->buffer, PIX_FMT_RGBA32,
 519             ci->pCodecCtx->width, ci->pCodecCtx->height);
 520     }
 521     // TODO loop, pingpong etc?
 522     if (0 == cleanup)
 523     {
 524 //        av_log(NULL, AV_LOG_DEBUG, "get_watermark_picture() Get a frame\n");
 525         while(av_read_frame(ci->pFormatCtx, &ci->packet)>=0)
 526         {
 527             // Is this a packet from the video stream?
 528             if(ci->packet.stream_index == ci->videoStream)
 529             {
 530                 // Decode video frame
 531                 avcodec_decode_video(ci->pCodecCtx, ci->pFrame, &ci->frameFinished,
 532                     ci->packet.data, ci->packet.size);
 533
 534                 // Did we get a video frame?
 535                 if(ci->frameFinished)
 536                 {
 537                     // Convert the image from its native format to RGBA32
 538                     img_convert((AVPicture *)ci->pFrameRGB, PIX_FMT_RGBA32,
 539                         (AVPicture*)(ci->pFrame), ci->pCodecCtx->pix_fmt, ci->pCodecCtx->width,
 540                         ci->pCodecCtx->height);
 541
 542                     // Process the video frame (save to disk etc.)
 543                     //fprintf(stderr,"banan() New frame!\n");
 544                     //DoSomethingWithTheImage(ci->pFrameRGB);
 545                     return 0;
 546                 }
 547             }
 548
 549             // Free the packet that was allocated by av_read_frame
 550             av_free_packet(&ci->packet);
 551         }
 552         ci->is_done = 1;
 553         return 0;
 554     } // if 0 != cleanup
 555
 556     if (0 != cleanup)
 557     {
 558         // Free the RGB image
 559         if (0 != ci->buffer) {
 560             av_free(ci->buffer);
 561             ci->buffer = 0;
 562         }
 563         if (0 != ci->pFrameRGB) {
 564             av_free(ci->pFrameRGB);
 565             ci->pFrameRGB = 0;
 566         }
 567
 568         // Close the codec
 569         if (0 != ci->pCodecCtx) {
 570             avcodec_close(ci->pCodecCtx);
 571             ci->pCodecCtx = 0;
 572         }
 573
 574         // Close the video file
 575         if (0 != ci->pFormatCtx) {
 576             av_close_input_file(ci->pFormatCtx);
 577             ci->pFormatCtx = 0;
 578         }
 579
 580         ci->is_done = 0;
 581     }
 582     return 0;
 583 }
 584
 585
 586 void parse_arg_file(const char *filename)
 587 {
 588 }