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watermark filter by (Marcus Engene <ffmpeg engene se>)

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Originally committed as revision 3983 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2005-02-25 22:22:20 +00:00
parent 8dd2a893dd
commit 21754ce65c
2 changed files with 442 additions and 1 deletions
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2
vhook/Makefile
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@ -7,7 +7,7 @@ CFLAGS=-fPIC $(SHCFLAGS) -I.. -I$(SRC_PATH) -I$(SRC_PATH)/libavformat -I$(SRC_PA
ifeq ($(CONFIG_DARWIN),yes)
SHFLAGS+=-flat_namespace -undefined suppress
endif
HOOKS=null.so fish.so ppm.so
HOOKS=null.so fish.so ppm.so watermark.so
ifeq ($(HAVE_IMLIB2),yes)
HOOKS += imlib2.so

441
vhook/watermark.c Normal file
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@ -0,0 +1,441 @@
/*
* Watermark Hook
* Copyright (c) 2005 Marcus Engene myfirstname(at)mylastname.se
*
* The watermarkpicture works like this. (Assuming colorintencities 0..0xff)
* Per color do this:
* If mask color is 0x80, no change to original frame.
* If mask color is < 0x80 the abs difference is subtracted from frame. If
* result < 0, result = 0
* If mask color is > 0x80 the abs difference is added to frame. If result
* > 0xff, result = 0xff
*
* This way a mask that is visible both in light pictures and in dark can be
* made (fex by using a picture generated by gimp and the bump map tool).
*
* An example watermark file is at
* http://engene.se/ffmpeg_watermark.gif
*
* This library 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 of the License, or (at your option) any later version.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
//#include <stdlib.h>
//#include <fcntl.h>
#include <unistd.h>
#include <stdarg.h>
#include "common.h"
#include "avformat.h"
#include "framehook.h"
typedef struct {
char filename[2000];
int x_size;
int y_size;
/* get_watermark_picture() variables */
AVFormatContext *pFormatCtx;
const char *p_ext;
int videoStream;
int frameFinished;
AVCodecContext *pCodecCtx;
AVCodec *pCodec;
AVFrame *pFrame;
AVPacket packet;
int numBytes;
uint8_t *buffer;
int i;
AVInputFormat *file_iformat;
AVStream *st;
int is_done;
AVFrame *pFrameRGB;
} ContextInfo;
int get_watermark_picture(ContextInfo *ci, int cleanup);
/****************************************************************************
*
****************************************************************************/
void Release(void *ctx)
{
ContextInfo *ci;
ci = (ContextInfo *) ctx;
if (ci) get_watermark_picture(ci, 1);
if (ctx)
av_free(ctx);
}
/****************************************************************************
*
****************************************************************************/
int Configure(void **ctxp, int argc, char *argv[])
{
ContextInfo *ci;
int c;
if (0 == (*ctxp = av_mallocz(sizeof(ContextInfo)))) return -1;
ci = (ContextInfo *) *ctxp;
optind = 0;
// Struct is mallocz:ed so no need to reset.
while ((c = getopt(argc, argv, "f:")) > 0) {
switch (c) {
case 'f':
strncpy(ci->filename, optarg, 1999);
ci->filename[1999] = 0;
break;
default:
av_log(NULL, AV_LOG_DEBUG, "Unrecognized argument '%s'\n", argv[optind]);
return -1;
}
}
//
if (0 == ci->filename[0]) return -1;
av_register_all();
return get_watermark_picture(ci, 0);
return 0;
}
/****************************************************************************
* Why is this a void returning functions? I want to be able to go wrong!
****************************************************************************/
void Process(void *ctx,
AVPicture *picture,
enum PixelFormat pix_fmt,
int src_width,
int src_height,
int64_t pts)
{
ContextInfo *ci = (ContextInfo *) ctx;
char *buf = 0;
AVPicture picture1;
AVPicture *pict = picture;
AVFrame *pFrameRGB;
int xm_size;
int ym_size;
// int retval = -1;
int x;
int y;
int offs, offsm;
int mpoffs;
uint32_t *p_pixel = 0;
uint32_t pixel_meck;
uint32_t pixel;
uint32_t pixelm;
int tmp;
//?? (void) ci;
if (pix_fmt != PIX_FMT_RGBA32) {
int size;
size = avpicture_get_size(PIX_FMT_RGBA32, src_width, src_height);
buf = av_malloc(size);
avpicture_fill(&picture1, buf, PIX_FMT_RGBA32, src_width, src_height);
if (img_convert(&picture1, PIX_FMT_RGBA32,
picture, pix_fmt, src_width, src_height) < 0) {
av_free(buf);
return;
}
pict = &picture1;
}
/* Insert filter code here */ /* ok */
// Get me next frame
if (0 > get_watermark_picture(ci, 0)) {
return;
}
// These are the three original static variables in the ffmpeg hack.
pFrameRGB = ci->pFrameRGB;
xm_size = ci->x_size;
ym_size = ci->y_size;
// I'll do the *4 => <<2 crap later. Most compilers understand that anyway.
// According to avcodec.h PIX_FMT_RGBA32 is handled in endian specific manner.
for (y=0; y<src_height; y++) {
offs = y * (src_width * 4);
offsm = (((y * ym_size) / src_height) * 4) * xm_size; // offsm first in maskline. byteoffs!
for (x=0; x<src_width; x++) {
mpoffs = offsm + (((x * xm_size) / src_width) * 4);
p_pixel = (uint32_t *)&((pFrameRGB->data[0])[mpoffs]);
pixelm = *p_pixel;
p_pixel = (uint32_t *)&((pict->data[0])[offs]);
pixel = *p_pixel;
// pixelm = *((uint32_t *)&(pFrameRGB->data[mpoffs]));
pixel_meck = pixel & 0xff000000;
// R
tmp = (int)((pixel >> 16) & 0xff) + (int)((pixelm >> 16) & 0xff) - 0x80;
if (tmp > 255) tmp = 255;
if (tmp < 0) tmp = 0;
pixel_meck |= (tmp << 16) & 0xff0000;
// G
tmp = (int)((pixel >> 8) & 0xff) + (int)((pixelm >> 8) & 0xff) - 0x80;
if (tmp > 255) tmp = 255;
if (tmp < 0) tmp = 0;
pixel_meck |= (tmp << 8) & 0xff00;
// B
tmp = (int)((pixel >> 0) & 0xff) + (int)((pixelm >> 0) & 0xff) - 0x80;
if (tmp > 255) tmp = 255;
if (tmp < 0) tmp = 0;
pixel_meck |= (tmp << 0) & 0xff;
// test:
//pixel_meck = pixel & 0xff000000;
//pixel_meck |= (pixelm & 0x00ffffff);
*p_pixel = pixel_meck;
offs += 4;
} // foreach X
} // foreach Y
if (pix_fmt != PIX_FMT_RGBA32) {
if (img_convert(picture, pix_fmt,
&picture1, PIX_FMT_RGBA32, src_width, src_height) < 0) {
}
}
av_free(buf);
}
/****************************************************************************
* When cleanup == 0, we try to get the next frame. If no next frame, nothing
* is done.
*
* This code follows the example on
* http://www.inb.uni-luebeck.de/~boehme/using_libavcodec.html
*
* 0 = ok, -1 = error
****************************************************************************/
int get_watermark_picture(ContextInfo *ci, int cleanup)
{
if (1 == ci->is_done && 0 == cleanup) return 0;
// Yes, *pFrameRGB arguments must be null the first time otherwise it's not good..
// This block is only executed the first time we enter this function.
if (0 == ci->pFrameRGB &&
0 == cleanup)
{
/*
* The last three parameters specify the file format, buffer size and format
* parameters; by simply specifying NULL or 0 we ask libavformat to auto-detect
* the format and use a default buffer size. (Didn't work!)
*/
if (av_open_input_file(&ci->pFormatCtx, ci->filename, NULL, 0, NULL) != 0) {
// Martin says this should not be necessary but it failed for me sending in
// NULL instead of file_iformat to av_open_input_file()
ci->i = strlen(ci->filename);
if (0 == ci->i) {
av_log(NULL, AV_LOG_DEBUG, "get_watermark_picture() No filename to watermark vhook\n");
return -1;
}
while (ci->i > 0) {
if (ci->filename[ci->i] == '.') {
ci->i++;
break;
}
ci->i--;
}
ci->p_ext = &(ci->filename[ci->i]);
ci->file_iformat = av_find_input_format (ci->p_ext);
if (0 == ci->file_iformat) {
av_log(NULL, AV_LOG_DEBUG, "get_watermark_picture() Really failed to find iformat [%s]\n", ci->p_ext);
return -1;
}
// now continues the Martin template.
if (av_open_input_file(&ci->pFormatCtx, ci->filename, ci->file_iformat, 0, NULL)!=0) {
av_log(NULL, AV_LOG_DEBUG, "get_watermark_picture() Failed to open input file [%s]\n", ci->filename);
return -1;
}
}
/*
* This fills the streams field of the AVFormatContext with valid information.
*/
if(av_find_stream_info(ci->pFormatCtx)<0) {
av_log(NULL, AV_LOG_DEBUG, "get_watermark_picture() Failed to find stream info\n");
return -1;
}
/*
* As mentioned in the introduction, we'll handle only video streams, not audio
* streams. To make things nice and easy, we simply use the first video stream we
* find.
*/
ci->videoStream=-1;
for(ci->i = 0; ci->i < ci->pFormatCtx->nb_streams; ci->i++)
if(ci->pFormatCtx->streams[ci->i]->codec.codec_type==CODEC_TYPE_VIDEO)
{
ci->videoStream = ci->i;
break;
}
if(ci->videoStream == -1) {
av_log(NULL, AV_LOG_DEBUG, "get_watermark_picture() Failed to find any video stream\n");
return -1;
}
ci->st = ci->pFormatCtx->streams[ci->videoStream];
ci->x_size = ci->st->codec.width;
ci->y_size = ci->st->codec.height;
// Get a pointer to the codec context for the video stream
ci->pCodecCtx = &ci->pFormatCtx->streams[ci->videoStream]->codec;
/*
* OK, so now we've got a pointer to the so-called codec context for our video
* stream, but we still have to find the actual codec and open it.
*/
// Find the decoder for the video stream
ci->pCodec = avcodec_find_decoder(ci->pCodecCtx->codec_id);
if(ci->pCodec == NULL) {
av_log(NULL, AV_LOG_DEBUG, "get_watermark_picture() Failed to find any codec\n");
return -1;
}
// Inform the codec that we can handle truncated bitstreams -- i.e.,
// bitstreams where frame boundaries can fall in the middle of packets
if (ci->pCodec->capabilities & CODEC_CAP_TRUNCATED)
ci->pCodecCtx->flags|=CODEC_FLAG_TRUNCATED;
// Open codec
if(avcodec_open(ci->pCodecCtx, ci->pCodec)<0) {
av_log(NULL, AV_LOG_DEBUG, "get_watermark_picture() Failed to open codec\n");
return -1;
}
// Hack to correct wrong frame rates that seem to be generated by some
// codecs
if (ci->pCodecCtx->frame_rate>1000 && ci->pCodecCtx->frame_rate_base==1)
ci->pCodecCtx->frame_rate_base=1000;
/*
* Allocate a video frame to store the decoded images in.
*/
ci->pFrame = avcodec_alloc_frame();
/*
* The RGB image pFrameRGB (of type AVFrame *) is allocated like this:
*/
// Allocate an AVFrame structure
ci->pFrameRGB=avcodec_alloc_frame();
if(ci->pFrameRGB==NULL) {
av_log(NULL, AV_LOG_DEBUG, "get_watermark_picture() Failed to alloc pFrameRGB\n");
return -1;
}
// Determine required buffer size and allocate buffer
ci->numBytes = avpicture_get_size(PIX_FMT_RGBA32, ci->pCodecCtx->width,
ci->pCodecCtx->height);
ci->buffer = av_malloc(ci->numBytes);
// Assign appropriate parts of buffer to image planes in pFrameRGB
avpicture_fill((AVPicture *)ci->pFrameRGB, ci->buffer, PIX_FMT_RGBA32,
ci->pCodecCtx->width, ci->pCodecCtx->height);
}
// TODO loop, pingpong etc?
if (0 == cleanup)
{
// av_log(NULL, AV_LOG_DEBUG, "get_watermark_picture() Get a frame\n");
while(av_read_frame(ci->pFormatCtx, &ci->packet)>=0)
{
// Is this a packet from the video stream?
if(ci->packet.stream_index == ci->videoStream)
{
// Decode video frame
avcodec_decode_video(ci->pCodecCtx, ci->pFrame, &ci->frameFinished,
ci->packet.data, ci->packet.size);
// Did we get a video frame?
if(ci->frameFinished)
{
// Convert the image from its native format to RGBA32
img_convert((AVPicture *)ci->pFrameRGB, PIX_FMT_RGBA32,
(AVPicture*)(ci->pFrame), ci->pCodecCtx->pix_fmt, ci->pCodecCtx->width,
ci->pCodecCtx->height);
// Process the video frame (save to disk etc.)
//fprintf(stderr,"banan() New frame!\n");
//DoSomethingWithTheImage(ci->pFrameRGB);
return 0;
}
}
// Free the packet that was allocated by av_read_frame
av_free_packet(&ci->packet);
}
ci->is_done = 1;
return 0;
} // if 0 != cleanup
if (0 != cleanup)
{
// Free the RGB image
if (0 != ci->buffer) {
av_free(ci->buffer);
ci->buffer = 0;
}
if (0 != ci->pFrameRGB) {
av_free(ci->pFrameRGB);
ci->pFrameRGB = 0;
}
// Close the codec
if (0 != ci->pCodecCtx) {
avcodec_close(ci->pCodecCtx);
ci->pCodecCtx = 0;
}
// Close the video file
if (0 != ci->pFormatCtx) {
av_close_input_file(ci->pFormatCtx);
ci->pFormatCtx = 0;
}
ci->is_done = 0;
}
return 0;
}
void parse_arg_file(const char *filename)
{
}