COSMETICS: Remove all trailing whitespace.
[libav.git] / vhook / watermark.c
1 /*
2 * Watermark Hook
3 * Copyright (c) 2005 Marcus Engene myfirstname(at)mylastname.se
4 *
5 * The watermarkpicture works like this. (Assuming colorintencities 0..0xff)
6 * Per color do this:
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
12 *
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).
15 *
16 * An example watermark file is at
17 * http://engene.se/ffmpeg_watermark.gif
18 *
19 * Example usage:
20 * ffmpeg -i infile -vhook '/path/watermark.so -f wm.gif' out.mov
21 *
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.
24 *
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.
29 *
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.
34 *
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
38 */
39
40 //#include <stdlib.h>
41 //#include <fcntl.h>
42 #include <unistd.h>
43 #include <stdarg.h>
44
45 #include "common.h"
46 #include "avformat.h"
47
48 #include "framehook.h"
49
50 typedef struct {
51 char filename[2000];
52 int x_size;
53 int y_size;
54
55 /* get_watermark_picture() variables */
56 AVFormatContext *pFormatCtx;
57 const char *p_ext;
58 int videoStream;
59 int frameFinished;
60 AVCodecContext *pCodecCtx;
61 AVCodec *pCodec;
62 AVFrame *pFrame;
63 AVPacket packet;
64 int numBytes;
65 uint8_t *buffer;
66 int i;
67 AVInputFormat *file_iformat;
68 AVStream *st;
69 int is_done;
70 AVFrame *pFrameRGB;
71 } ContextInfo;
72
73 int get_watermark_picture(ContextInfo *ci, int cleanup);
74
75
76 /****************************************************************************
77 *
78 ****************************************************************************/
79 void Release(void *ctx)
80 {
81 ContextInfo *ci;
82 ci = (ContextInfo *) ctx;
83
84 if (ci) get_watermark_picture(ci, 1);
85
86 if (ctx)
87 av_free(ctx);
88 }
89
90
91 /****************************************************************************
92 *
93 ****************************************************************************/
94 int Configure(void **ctxp, int argc, char *argv[])
95 {
96 ContextInfo *ci;
97 int c;
98
99 if (0 == (*ctxp = av_mallocz(sizeof(ContextInfo)))) return -1;
100 ci = (ContextInfo *) *ctxp;
101
102 optind = 1;
103
104 // Struct is mallocz:ed so no need to reset.
105
106 while ((c = getopt(argc, argv, "f:")) > 0) {
107 switch (c) {
108 case 'f':
109 strncpy(ci->filename, optarg, 1999);
110 ci->filename[1999] = 0;
111 break;
112 default:
113 av_log(NULL, AV_LOG_ERROR, "Watermark: Unrecognized argument '%s'\n", argv[optind]);
114 return -1;
115 }
116 }
117
118 //
119 if (0 == ci->filename[0]) {
120 av_log(NULL, AV_LOG_ERROR, "Watermark: There is no filename specified.\n");
121 return -1;
122 }
123
124 av_register_all();
125 return get_watermark_picture(ci, 0);
126 }
127
128
129 /****************************************************************************
130 * Why is this a void returning functions? I want to be able to go wrong!
131 ****************************************************************************/
132 void Process(void *ctx,
133 AVPicture *picture,
134 enum PixelFormat pix_fmt,
135 int src_width,
136 int src_height,
137 int64_t pts)
138 {
139 ContextInfo *ci = (ContextInfo *) ctx;
140 char *buf = 0;
141 AVPicture picture1;
142 AVPicture *pict = picture;
143
144 AVFrame *pFrameRGB;
145 int xm_size;
146 int ym_size;
147
148 // int retval = -1;
149 int x;
150 int y;
151 int offs, offsm;
152 int mpoffs;
153 uint32_t *p_pixel = 0;
154 uint32_t pixel_meck;
155 uint32_t pixel;
156 uint32_t pixelm;
157 int tmp;
158
159
160 //?? (void) ci;
161
162 if (pix_fmt != PIX_FMT_RGBA32) {
163 int size;
164
165 size = avpicture_get_size(PIX_FMT_RGBA32, src_width, src_height);
166 buf = av_malloc(size);
167
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) {
171 av_free(buf);
172 return;
173 }
174 pict = &picture1;
175 }
176
177 /* Insert filter code here */ /* ok */
178
179 // Get me next frame
180 if (0 > get_watermark_picture(ci, 0)) {
181 return;
182 }
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;
187
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]);
196 pixelm = *p_pixel;
197 p_pixel = (uint32_t *)&((pict->data[0])[offs]);
198 pixel = *p_pixel;
199 // pixelm = *((uint32_t *)&(pFrameRGB->data[mpoffs]));
200 pixel_meck = pixel & 0xff000000;
201
202 // R
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;
207 // G
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;
212 // B
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;
217
218
219 // test:
220 //pixel_meck = pixel & 0xff000000;
221 //pixel_meck |= (pixelm & 0x00ffffff);
222
223 *p_pixel = pixel_meck;
224
225 offs += 4;
226 } // foreach X
227 } // foreach Y
228
229
230
231
232 if (pix_fmt != PIX_FMT_RGBA32) {
233 if (img_convert(picture, pix_fmt,
234 &picture1, PIX_FMT_RGBA32, src_width, src_height) < 0) {
235 }
236 }
237
238 av_free(buf);
239 }
240
241
242 /****************************************************************************
243 * When cleanup == 0, we try to get the next frame. If no next frame, nothing
244 * is done.
245 *
246 * This code follows the example on
247 * http://www.inb.uni-luebeck.de/~boehme/using_libavcodec.html
248 *
249 * 0 = ok, -1 = error
250 ****************************************************************************/
251 int get_watermark_picture(ContextInfo *ci, int cleanup)
252 {
253 if (1 == ci->is_done && 0 == cleanup) return 0;
254
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 &&
258 0 == cleanup)
259 {
260
261 /*
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!)
265 */
266 if (av_open_input_file(&ci->pFormatCtx, ci->filename, NULL, 0, NULL) != 0) {
267
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);
271 if (0 == ci->i) {
272 av_log(NULL, AV_LOG_ERROR, "get_watermark_picture() No filename to watermark vhook\n");
273 return -1;
274 }
275 while (ci->i > 0) {
276 if (ci->filename[ci->i] == '.') {
277 ci->i++;
278 break;
279 }
280 ci->i--;
281 }
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);
286 return -1;
287 }
288 // now continues the Martin template.
289
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);
292 return -1;
293 }
294 }
295
296 /*
297 * This fills the streams field of the AVFormatContext with valid information.
298 */
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");
301 return -1;
302 }
303
304 /*
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
307 * find.
308 */
309 ci->videoStream=-1;
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)
312 {
313 ci->videoStream = ci->i;
314 break;
315 }
316 if(ci->videoStream == -1) {
317 av_log(NULL, AV_LOG_ERROR, "get_watermark_picture() Failed to find any video stream\n");
318 return -1;
319 }
320
321 ci->st = ci->pFormatCtx->streams[ci->videoStream];
322 ci->x_size = ci->st->codec->width;
323 ci->y_size = ci->st->codec->height;
324
325 // Get a pointer to the codec context for the video stream
326 ci->pCodecCtx = ci->pFormatCtx->streams[ci->videoStream]->codec;
327
328
329 /*
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.
332 */
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");
337 return -1;
338 }
339
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;
344
345 // Open codec
346 if(avcodec_open(ci->pCodecCtx, ci->pCodec)<0) {
347 av_log(NULL, AV_LOG_ERROR, "get_watermark_picture() Failed to open codec\n");
348 return -1;
349 }
350
351 // Hack to correct wrong frame rates that seem to be generated by some
352 // codecs
353 if (ci->pCodecCtx->time_base.den>1000 && ci->pCodecCtx->time_base.num==1)
354 ci->pCodecCtx->time_base.num=1000;
355
356 /*
357 * Allocate a video frame to store the decoded images in.
358 */
359 ci->pFrame = avcodec_alloc_frame();
360
361
362 /*
363 * The RGB image pFrameRGB (of type AVFrame *) is allocated like this:
364 */
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");
369 return -1;
370 }
371
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);
376
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);
380 }
381 // TODO loop, pingpong etc?
382 if (0 == cleanup)
383 {
384 // av_log(NULL, AV_LOG_DEBUG, "get_watermark_picture() Get a frame\n");
385 while(av_read_frame(ci->pFormatCtx, &ci->packet)>=0)
386 {
387 // Is this a packet from the video stream?
388 if(ci->packet.stream_index == ci->videoStream)
389 {
390 // Decode video frame
391 avcodec_decode_video(ci->pCodecCtx, ci->pFrame, &ci->frameFinished,
392 ci->packet.data, ci->packet.size);
393
394 // Did we get a video frame?
395 if(ci->frameFinished)
396 {
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);
401
402 // Process the video frame (save to disk etc.)
403 //fprintf(stderr,"banan() New frame!\n");
404 //DoSomethingWithTheImage(ci->pFrameRGB);
405 return 0;
406 }
407 }
408
409 // Free the packet that was allocated by av_read_frame
410 av_free_packet(&ci->packet);
411 }
412 ci->is_done = 1;
413 return 0;
414 } // if 0 != cleanup
415
416 if (0 != cleanup)
417 {
418 // Free the RGB image
419 if (0 != ci->buffer) {
420 av_free(ci->buffer);
421 ci->buffer = 0;
422 }
423 if (0 != ci->pFrameRGB) {
424 av_free(ci->pFrameRGB);
425 ci->pFrameRGB = 0;
426 }
427
428 // Close the codec
429 if (0 != ci->pCodecCtx) {
430 avcodec_close(ci->pCodecCtx);
431 ci->pCodecCtx = 0;
432 }
433
434 // Close the video file
435 if (0 != ci->pFormatCtx) {
436 av_close_input_file(ci->pFormatCtx);
437 ci->pFormatCtx = 0;
438 }
439
440 ci->is_done = 0;
441 }
442 return 0;
443 }
444
445
446 void parse_arg_file(const char *filename)
447 {
448 }