3 * Copyright (c) 2005 Marcus Engene myfirstname(at)mylastname.se
5 * The watermarkpicture works like this. (Assuming colorintencities 0..0xff)
7 * If mask color is 0x80, no change to original frame.
8 * If mask color is < 0x80 the abs difference is subtracted from frame. If
9 * result < 0, result = 0
10 * If mask color is > 0x80 the abs difference is added to frame. If result
11 * > 0xff, result = 0xff
13 * This way a mask that is visible both in light pictures and in dark can be
14 * made (fex by using a picture generated by gimp and the bump map tool).
16 * An example watermark file is at
17 * http://engene.se/ffmpeg_watermark.gif
20 * ffmpeg -i infile -vhook '/path/watermark.so -f wm.gif' out.mov
22 * Note that the entire vhook argument is encapsulated in ''. This
23 * way, arguments to the vhook won't be mixed up with those to ffmpeg.
25 * This library is free software; you can redistribute it and/or
26 * modify it under the terms of the GNU Lesser General Public
27 * License as published by the Free Software Foundation; either
28 * version 2 of the License, or (at your option) any later version.
30 * This library is distributed in the hope that it will be useful,
31 * but WITHOUT ANY WARRANTY; without even the implied warranty of
32 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
33 * Lesser General Public License for more details.
35 * You should have received a copy of the GNU Lesser General Public
36 * License along with this library; if not, write to the Free Software
37 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
48 #include "framehook.h"
55 /* get_watermark_picture() variables */
56 AVFormatContext *pFormatCtx;
60 AVCodecContext *pCodecCtx;
67 AVInputFormat *file_iformat;
73 int get_watermark_picture(ContextInfo *ci, int cleanup);
76 /****************************************************************************
78 ****************************************************************************/
79 void Release(void *ctx)
82 ci = (ContextInfo *) ctx;
84 if (ci) get_watermark_picture(ci, 1);
91 /****************************************************************************
93 ****************************************************************************/
94 int Configure(void **ctxp, int argc, char *argv[])
99 if (0 == (*ctxp = av_mallocz(sizeof(ContextInfo)))) return -1;
100 ci = (ContextInfo *) *ctxp;
104 // Struct is mallocz:ed so no need to reset.
106 while ((c = getopt(argc, argv, "f:")) > 0) {
109 strncpy(ci->filename, optarg, 1999);
110 ci->filename[1999] = 0;
113 av_log(NULL, AV_LOG_ERROR, "Watermark: Unrecognized argument '%s'\n", argv[optind]);
119 if (0 == ci->filename[0]) {
120 av_log(NULL, AV_LOG_ERROR, "Watermark: There is no filename specified.\n");
125 return get_watermark_picture(ci, 0);
129 /****************************************************************************
130 * Why is this a void returning functions? I want to be able to go wrong!
131 ****************************************************************************/
132 void Process(void *ctx,
134 enum PixelFormat pix_fmt,
139 ContextInfo *ci = (ContextInfo *) ctx;
142 AVPicture *pict = picture;
153 uint32_t *p_pixel = 0;
162 if (pix_fmt != PIX_FMT_RGBA32) {
165 size = avpicture_get_size(PIX_FMT_RGBA32, src_width, src_height);
166 buf = av_malloc(size);
168 avpicture_fill(&picture1, buf, PIX_FMT_RGBA32, src_width, src_height);
169 if (img_convert(&picture1, PIX_FMT_RGBA32,
170 picture, pix_fmt, src_width, src_height) < 0) {
177 /* Insert filter code here */ /* ok */
180 if (0 > get_watermark_picture(ci, 0)) {
183 // These are the three original static variables in the ffmpeg hack.
184 pFrameRGB = ci->pFrameRGB;
185 xm_size = ci->x_size;
186 ym_size = ci->y_size;
188 // I'll do the *4 => <<2 crap later. Most compilers understand that anyway.
189 // According to avcodec.h PIX_FMT_RGBA32 is handled in endian specific manner.
190 for (y=0; y<src_height; y++) {
191 offs = y * (src_width * 4);
192 offsm = (((y * ym_size) / src_height) * 4) * xm_size; // offsm first in maskline. byteoffs!
193 for (x=0; x<src_width; x++) {
194 mpoffs = offsm + (((x * xm_size) / src_width) * 4);
195 p_pixel = (uint32_t *)&((pFrameRGB->data[0])[mpoffs]);
197 p_pixel = (uint32_t *)&((pict->data[0])[offs]);
199 // pixelm = *((uint32_t *)&(pFrameRGB->data[mpoffs]));
200 pixel_meck = pixel & 0xff000000;
203 tmp = (int)((pixel >> 16) & 0xff) + (int)((pixelm >> 16) & 0xff) - 0x80;
204 if (tmp > 255) tmp = 255;
205 if (tmp < 0) tmp = 0;
206 pixel_meck |= (tmp << 16) & 0xff0000;
208 tmp = (int)((pixel >> 8) & 0xff) + (int)((pixelm >> 8) & 0xff) - 0x80;
209 if (tmp > 255) tmp = 255;
210 if (tmp < 0) tmp = 0;
211 pixel_meck |= (tmp << 8) & 0xff00;
213 tmp = (int)((pixel >> 0) & 0xff) + (int)((pixelm >> 0) & 0xff) - 0x80;
214 if (tmp > 255) tmp = 255;
215 if (tmp < 0) tmp = 0;
216 pixel_meck |= (tmp << 0) & 0xff;
220 //pixel_meck = pixel & 0xff000000;
221 //pixel_meck |= (pixelm & 0x00ffffff);
223 *p_pixel = pixel_meck;
232 if (pix_fmt != PIX_FMT_RGBA32) {
233 if (img_convert(picture, pix_fmt,
234 &picture1, PIX_FMT_RGBA32, src_width, src_height) < 0) {
242 /****************************************************************************
243 * When cleanup == 0, we try to get the next frame. If no next frame, nothing
246 * This code follows the example on
247 * http://www.inb.uni-luebeck.de/~boehme/using_libavcodec.html
250 ****************************************************************************/
251 int get_watermark_picture(ContextInfo *ci, int cleanup)
253 if (1 == ci->is_done && 0 == cleanup) return 0;
255 // Yes, *pFrameRGB arguments must be null the first time otherwise it's not good..
256 // This block is only executed the first time we enter this function.
257 if (0 == ci->pFrameRGB &&
262 * The last three parameters specify the file format, buffer size and format
263 * parameters; by simply specifying NULL or 0 we ask libavformat to auto-detect
264 * the format and use a default buffer size. (Didn't work!)
266 if (av_open_input_file(&ci->pFormatCtx, ci->filename, NULL, 0, NULL) != 0) {
268 // Martin says this should not be necessary but it failed for me sending in
269 // NULL instead of file_iformat to av_open_input_file()
270 ci->i = strlen(ci->filename);
272 av_log(NULL, AV_LOG_ERROR, "get_watermark_picture() No filename to watermark vhook\n");
276 if (ci->filename[ci->i] == '.') {
282 ci->p_ext = &(ci->filename[ci->i]);
283 ci->file_iformat = av_find_input_format (ci->p_ext);
284 if (0 == ci->file_iformat) {
285 av_log(NULL, AV_LOG_ERROR, "get_watermark_picture() Really failed to find iformat [%s]\n", ci->p_ext);
288 // now continues the Martin template.
290 if (av_open_input_file(&ci->pFormatCtx, ci->filename, ci->file_iformat, 0, NULL)!=0) {
291 av_log(NULL, AV_LOG_ERROR, "get_watermark_picture() Failed to open input file [%s]\n", ci->filename);
297 * This fills the streams field of the AVFormatContext with valid information.
299 if(av_find_stream_info(ci->pFormatCtx)<0) {
300 av_log(NULL, AV_LOG_ERROR, "get_watermark_picture() Failed to find stream info\n");
305 * As mentioned in the introduction, we'll handle only video streams, not audio
306 * streams. To make things nice and easy, we simply use the first video stream we
310 for(ci->i = 0; ci->i < ci->pFormatCtx->nb_streams; ci->i++)
311 if(ci->pFormatCtx->streams[ci->i]->codec->codec_type==CODEC_TYPE_VIDEO)
313 ci->videoStream = ci->i;
316 if(ci->videoStream == -1) {
317 av_log(NULL, AV_LOG_ERROR, "get_watermark_picture() Failed to find any video stream\n");
321 ci->st = ci->pFormatCtx->streams[ci->videoStream];
322 ci->x_size = ci->st->codec->width;
323 ci->y_size = ci->st->codec->height;
325 // Get a pointer to the codec context for the video stream
326 ci->pCodecCtx = ci->pFormatCtx->streams[ci->videoStream]->codec;
330 * OK, so now we've got a pointer to the so-called codec context for our video
331 * stream, but we still have to find the actual codec and open it.
333 // Find the decoder for the video stream
334 ci->pCodec = avcodec_find_decoder(ci->pCodecCtx->codec_id);
335 if(ci->pCodec == NULL) {
336 av_log(NULL, AV_LOG_ERROR, "get_watermark_picture() Failed to find any codec\n");
340 // Inform the codec that we can handle truncated bitstreams -- i.e.,
341 // bitstreams where frame boundaries can fall in the middle of packets
342 if (ci->pCodec->capabilities & CODEC_CAP_TRUNCATED)
343 ci->pCodecCtx->flags|=CODEC_FLAG_TRUNCATED;
346 if(avcodec_open(ci->pCodecCtx, ci->pCodec)<0) {
347 av_log(NULL, AV_LOG_ERROR, "get_watermark_picture() Failed to open codec\n");
351 // Hack to correct wrong frame rates that seem to be generated by some
353 if (ci->pCodecCtx->time_base.den>1000 && ci->pCodecCtx->time_base.num==1)
354 ci->pCodecCtx->time_base.num=1000;
357 * Allocate a video frame to store the decoded images in.
359 ci->pFrame = avcodec_alloc_frame();
363 * The RGB image pFrameRGB (of type AVFrame *) is allocated like this:
365 // Allocate an AVFrame structure
366 ci->pFrameRGB=avcodec_alloc_frame();
367 if(ci->pFrameRGB==NULL) {
368 av_log(NULL, AV_LOG_ERROR, "get_watermark_picture() Failed to alloc pFrameRGB\n");
372 // Determine required buffer size and allocate buffer
373 ci->numBytes = avpicture_get_size(PIX_FMT_RGBA32, ci->pCodecCtx->width,
374 ci->pCodecCtx->height);
375 ci->buffer = av_malloc(ci->numBytes);
377 // Assign appropriate parts of buffer to image planes in pFrameRGB
378 avpicture_fill((AVPicture *)ci->pFrameRGB, ci->buffer, PIX_FMT_RGBA32,
379 ci->pCodecCtx->width, ci->pCodecCtx->height);
381 // TODO loop, pingpong etc?
384 // av_log(NULL, AV_LOG_DEBUG, "get_watermark_picture() Get a frame\n");
385 while(av_read_frame(ci->pFormatCtx, &ci->packet)>=0)
387 // Is this a packet from the video stream?
388 if(ci->packet.stream_index == ci->videoStream)
390 // Decode video frame
391 avcodec_decode_video(ci->pCodecCtx, ci->pFrame, &ci->frameFinished,
392 ci->packet.data, ci->packet.size);
394 // Did we get a video frame?
395 if(ci->frameFinished)
397 // Convert the image from its native format to RGBA32
398 img_convert((AVPicture *)ci->pFrameRGB, PIX_FMT_RGBA32,
399 (AVPicture*)(ci->pFrame), ci->pCodecCtx->pix_fmt, ci->pCodecCtx->width,
400 ci->pCodecCtx->height);
402 // Process the video frame (save to disk etc.)
403 //fprintf(stderr,"banan() New frame!\n");
404 //DoSomethingWithTheImage(ci->pFrameRGB);
409 // Free the packet that was allocated by av_read_frame
410 av_free_packet(&ci->packet);
418 // Free the RGB image
419 if (0 != ci->buffer) {
423 if (0 != ci->pFrameRGB) {
424 av_free(ci->pFrameRGB);
429 if (0 != ci->pCodecCtx) {
430 avcodec_close(ci->pCodecCtx);
434 // Close the video file
435 if (0 != ci->pFormatCtx) {
436 av_close_input_file(ci->pFormatCtx);
446 void parse_arg_file(const char *filename)