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picture.c
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picture.c
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/* picture.c
*
* Various funtions for saving/loading pictures.
* Copyright 2002 by Jeroen Vreeken ([email protected])
* Portions of this file are Copyright by Lionnel Maugis
* Portions of this file are Copyright 2010 by Wim Lewis ([email protected])
* This software is distributed under the GNU public license version 2
* See also the file 'COPYING'.
*
*/
#include "picture.h"
#include "event.h"
#include <assert.h>
#undef HAVE_STDLIB_H
#include <jpeglib.h>
#include <jerror.h>
/*
* The following declarations and 5 functions are jpeg related
* functions used by put_jpeg_grey_memory and put_jpeg_yuv420p_memory.
*/
typedef struct {
struct jpeg_destination_mgr pub;
JOCTET *buf;
size_t bufsize;
size_t jpegsize;
} mem_destination_mgr;
typedef mem_destination_mgr *mem_dest_ptr;
METHODDEF(void) init_destination(j_compress_ptr cinfo)
{
mem_dest_ptr dest = (mem_dest_ptr) cinfo->dest;
dest->pub.next_output_byte = dest->buf;
dest->pub.free_in_buffer = dest->bufsize;
dest->jpegsize = 0;
}
METHODDEF(boolean) empty_output_buffer(j_compress_ptr cinfo)
{
mem_dest_ptr dest = (mem_dest_ptr) cinfo->dest;
dest->pub.next_output_byte = dest->buf;
dest->pub.free_in_buffer = dest->bufsize;
return FALSE;
ERREXIT(cinfo, JERR_BUFFER_SIZE);
}
METHODDEF(void) term_destination(j_compress_ptr cinfo)
{
mem_dest_ptr dest = (mem_dest_ptr) cinfo->dest;
dest->jpegsize = dest->bufsize - dest->pub.free_in_buffer;
}
static GLOBAL(void) _jpeg_mem_dest(j_compress_ptr cinfo, JOCTET* buf, size_t bufsize)
{
mem_dest_ptr dest;
if (cinfo->dest == NULL) {
cinfo->dest = (struct jpeg_destination_mgr *)
(*cinfo->mem->alloc_small)((j_common_ptr)cinfo, JPOOL_PERMANENT,
sizeof(mem_destination_mgr));
}
dest = (mem_dest_ptr) cinfo->dest;
dest->pub.init_destination = init_destination;
dest->pub.empty_output_buffer = empty_output_buffer;
dest->pub.term_destination = term_destination;
dest->buf = buf;
dest->bufsize = bufsize;
dest->jpegsize = 0;
}
static GLOBAL(int) _jpeg_mem_size(j_compress_ptr cinfo)
{
mem_dest_ptr dest = (mem_dest_ptr) cinfo->dest;
return dest->jpegsize;
}
/* EXIF image data is always in TIFF format, even if embedded in another
* file type. This consists of a constant header (TIFF file header,
* IFD header) followed by the tags in the IFD and then the data
* from any tags which do not fit inline in the IFD.
*
* The tags we write in the main IFD are:
* 0x010E Image description
* 0x8769 Exif sub-IFD
* 0x882A Time zone of time stamps
* and in the Exif sub-IFD:
* 0x9000 Exif version
* 0x9003 File date and time
* 0x9291 File date and time subsecond info
* But we omit any empty IFDs.
*/
#define TIFF_TAG_IMAGE_DESCRIPTION 0x010E
#define TIFF_TAG_DATETIME 0x0132
#define TIFF_TAG_EXIF_IFD 0x8769
#define TIFF_TAG_TZ_OFFSET 0x882A
#define EXIF_TAG_EXIF_VERSION 0x9000
#define EXIF_TAG_ORIGINAL_DATETIME 0x9003
#define EXIF_TAG_SUBJECT_AREA 0x9214
#define EXIF_TAG_TIFF_DATETIME_SS 0x9290
#define EXIF_TAG_ORIGINAL_DATETIME_SS 0x9291
#define TIFF_TYPE_ASCII 2 /* ASCII text */
#define TIFF_TYPE_USHORT 3 /* Unsigned 16-bit int */
#define TIFF_TYPE_LONG 4 /* Unsigned 32-bit int */
#define TIFF_TYPE_UNDEF 7 /* Byte blob */
#define TIFF_TYPE_SSHORT 8 /* Signed 16-bit int */
static const char exif_marker_start[14] = {
'E', 'x', 'i', 'f', 0, 0, /* EXIF marker signature */
'M', 'M', 0, 42, /* TIFF file header (big-endian) */
0, 0, 0, 8, /* Offset to first toplevel IFD */
};
static const char exif_version_tag[12] = {
0x90, 0x00, /* EXIF version tag, 0x9000 */
0x00, 0x07, /* Data type 7 = "unknown" (raw byte blob) */
0x00, 0x00, 0x00, 0x04, /* Data length */
0x30, 0x32, 0x32, 0x30 /* Inline data, EXIF version 2.2 */
};
static const char exif_subifd_tag[8] = {
0x87, 0x69, /* EXIF Sub-IFD tag */
0x00, 0x04, /* Data type 4 = uint32 */
0x00, 0x00, 0x00, 0x01, /* Number of values */
};
static const char exif_tzoffset_tag[12] = {
0x88, 0x2A, /* TIFF/EP time zone offset tag */
0x00, 0x08, /* Data type 8 = sint16 */
0x00, 0x00, 0x00, 0x01, /* Number of values */
0, 0, 0, 0 /* Dummy data */
};
static void put_uint16(JOCTET *buf, unsigned value)
{
buf[0] = ( value & 0xFF00 ) >> 8;
buf[1] = ( value & 0x00FF );
}
static void put_sint16(JOCTET *buf, int value)
{
buf[0] = ( value & 0xFF00 ) >> 8;
buf[1] = ( value & 0x00FF );
}
static void put_uint32(JOCTET *buf, unsigned value)
{
buf[0] = ( value & 0xFF000000 ) >> 24;
buf[1] = ( value & 0x00FF0000 ) >> 16;
buf[2] = ( value & 0x0000FF00 ) >> 8;
buf[3] = ( value & 0x000000FF );
}
struct tiff_writing {
JOCTET * const base;
JOCTET *buf;
unsigned data_offset;
};
static void put_direntry(struct tiff_writing *into, const char *data, unsigned length)
{
if (length <= 4) {
/* Entries that fit in the directory entry are stored there */
memset(into->buf, 0, 4);
memcpy(into->buf, data, length);
} else {
/* Longer entries are stored out-of-line */
unsigned offset = into->data_offset;
while ((offset & 0x03) != 0) { /* Alignment */
into->base[offset] = 0;
offset ++;
}
put_uint32(into->buf, offset);
memcpy(into->base + offset, data, length);
into->data_offset = offset + length;
}
}
static void put_stringentry(struct tiff_writing *into, unsigned tag, const char *str, int with_nul)
{
unsigned stringlength = strlen(str) + (with_nul?1:0);
put_uint16(into->buf, tag);
put_uint16(into->buf + 2, TIFF_TYPE_ASCII);
put_uint32(into->buf + 4, stringlength);
into->buf += 8;
put_direntry(into, str, stringlength);
into->buf += 4;
}
static void put_subjectarea(struct tiff_writing *into, const struct coord *box)
{
put_uint16(into->buf , EXIF_TAG_SUBJECT_AREA);
put_uint16(into->buf + 2, TIFF_TYPE_USHORT);
put_uint32(into->buf + 4, 4 /* Four USHORTs */);
put_uint32(into->buf + 8, into->data_offset);
into->buf += 12;
JOCTET *ool = into->base + into->data_offset;
put_uint16(ool , box->x); /* Center.x */
put_uint16(ool+2, box->y); /* Center.y */
put_uint16(ool+4, box->width);
put_uint16(ool+6, box->height);
into->data_offset += 8;
}
/*
* put_jpeg_exif writes the EXIF APP1 chunk to the jpeg file.
* It must be called after jpeg_start_compress() but before
* any image data is written by jpeg_write_scanlines().
*/
static void put_jpeg_exif(j_compress_ptr cinfo,
const struct context *cnt,
const struct tm *timestamp,
const struct coord *box)
{
/* description, datetime, and subtime are the values that are actually
* put into the EXIF data
*/
char *description, *datetime, *subtime;
char datetime_buf[22];
if (timestamp) {
/* Exif requires this exact format */
snprintf(datetime_buf, 21, "%04d:%02d:%02d %02d:%02d:%02d",
timestamp->tm_year + 1900,
timestamp->tm_mon + 1,
timestamp->tm_mday,
timestamp->tm_hour,
timestamp->tm_min,
timestamp->tm_sec);
datetime = datetime_buf;
} else {
datetime = NULL;
}
// TODO: Extract subsecond timestamp from somewhere, but only
// use as much of it as is indicated by conf->frame_limit
subtime = NULL;
if (cnt->conf.exif_text) {
description = malloc(PATH_MAX);
mystrftime(cnt, description, PATH_MAX-1,
cnt->conf.exif_text,
timestamp, NULL, 0, 0);
} else {
description = NULL;
}
/* Calculate an upper bound on the size of the APP1 marker so
* we can allocate a buffer for it.
*/
/* Count up the number of tags and max amount of OOL data */
int ifd0_tagcount = 0;
int ifd1_tagcount = 0;
unsigned datasize = 0;
if (description) {
ifd0_tagcount ++;
datasize += 5 + strlen(description); /* Add 5 for NUL and alignment */
}
if (datetime) {
/* We write this to both the TIFF datetime tag (which most programs
* treat as "last-modified-date") and the EXIF "time of creation of
* original image" tag (which many programs ignore). This is
* redundant but seems to be the thing to do.
*/
ifd0_tagcount++;
ifd1_tagcount++;
/* We also write the timezone-offset tag in IFD0 */
ifd0_tagcount++;
/* It would be nice to use the same offset for both tags' values,
* but I don't want to write the bookkeeping for that right now */
datasize += 2 * (5 + strlen(datetime));
}
if (subtime) {
ifd1_tagcount++;
datasize += 5 + strlen(subtime);
}
if (box) {
ifd1_tagcount++;
datasize += 2 * 4; /* Four 16-bit ints */
}
if (ifd1_tagcount > 0) {
/* If we're writing the Exif sub-IFD, account for the
* two tags that requires */
ifd0_tagcount ++; /* The tag in IFD0 that points to IFD1 */
ifd1_tagcount ++; /* The EXIF version tag */
}
/* Each IFD takes 12 bytes per tag, plus six more (the tag count and the
* pointer to the next IFD, always zero in our case)
*/
unsigned int ifds_size =
( ifd1_tagcount > 0 ? ( 12 * ifd1_tagcount + 6 ) : 0 ) +
( ifd0_tagcount > 0 ? ( 12 * ifd0_tagcount + 6 ) : 0 );
if (ifds_size == 0) {
/* We're not actually going to write any information. */
return;
}
unsigned int buffer_size = 6 /* EXIF marker signature */ +
8 /* TIFF file header */ +
ifds_size /* the tag directories */ +
datasize;
JOCTET *marker = malloc(buffer_size);
memcpy(marker, exif_marker_start, 14); /* EXIF and TIFF headers */
struct tiff_writing writing = (struct tiff_writing) {
.base = marker + 6, /* base address for intra-TIFF offsets */
.buf = marker + 14, /* current write position */
.data_offset = 8 + ifds_size, /* where to start storing data */
};
/* Write IFD 0 */
/* Note that tags are stored in numerical order */
put_uint16(writing.buf, ifd0_tagcount);
writing.buf += 2;
if (description)
put_stringentry(&writing, TIFF_TAG_IMAGE_DESCRIPTION, description, 0);
if (datetime)
put_stringentry(&writing, TIFF_TAG_DATETIME, datetime, 1);
if (ifd1_tagcount > 0) {
/* Offset of IFD1 - TIFF header + IFD0 size. */
unsigned ifd1_offset = 8 + 6 + ( 12 * ifd0_tagcount );
memcpy(writing.buf, exif_subifd_tag, 8);
put_uint32(writing.buf + 8, ifd1_offset);
writing.buf += 12;
}
if (datetime) {
memcpy(writing.buf, exif_tzoffset_tag, 12);
put_sint16(writing.buf+8, timestamp->tm_gmtoff / 3600);
writing.buf += 12;
}
put_uint32(writing.buf, 0); /* Next IFD offset = 0 (no next IFD) */
writing.buf += 4;
/* Write IFD 1 */
if (ifd1_tagcount > 0) {
/* (remember that the tags in any IFD must be in numerical order
* by tag) */
put_uint16(writing.buf, ifd1_tagcount);
memcpy(writing.buf + 2, exif_version_tag, 12); /* tag 0x9000 */
writing.buf += 14;
if (datetime)
put_stringentry(&writing, EXIF_TAG_ORIGINAL_DATETIME, datetime, 1);
if (box)
put_subjectarea(&writing, box);
if (subtime)
put_stringentry(&writing, EXIF_TAG_ORIGINAL_DATETIME_SS, subtime, 0);
put_uint32(writing.buf, 0); /* Next IFD = 0 (no next IFD) */
writing.buf += 4;
}
/* We should have met up with the OOL data */
assert( (writing.buf - writing.base) == 8 + ifds_size );
/* The buffer is complete; write it out */
unsigned marker_len = 6 + writing.data_offset;
/* assert we didn't underestimate the original buffer size */
assert(marker_len <= buffer_size);
/* EXIF data lives in a JPEG APP1 marker */
jpeg_write_marker(cinfo, JPEG_APP0 + 1, marker, marker_len);
if (description)
free(description);
free(marker);
}
#if defined(HAVE_FFMPEG) && 0
/**
* put_jpeg_yuv420p_memory
* Converts an input image in the YUV420P format into a jpeg image and puts
* it in a memory buffer.
* Inputs:
* - image_size is the size of the input image buffer.
* - input_image is the image in YUV420P format.
* - width and height are the dimensions of the image
* - quality is the jpeg encoding quality 0-100%
*
* Output:
* - dest_image is a pointer to the jpeg image buffer
*
* Returns buffer size of jpeg image
*/
static int put_jpeg_yuv420p_memory(unsigned char *dest_image, int image_size,
unsigned char *input_image, int width, int height, int quality,
struct context *cnt, struct tm *tm, struct coord *box)
{
AVCodec *codec;
AVCodecContext *c= NULL;
int i, out_size, size, x, y, outbuf_size;
FILE *f;
AVFrame *picture;
uint8_t *outbuf, *picture_buf;
00209 printf("Video encoding\n");
/* find the jpeg encoder */
codec = avcodec_find_encoder(CODEC_ID_MJPEG);
if (!codec) {
fprintf(stderr, "codec not found\n");
exit(1);
}
c= avcodec_alloc_context();
picture= avcodec_alloc_frame();
00221 /* put sample parameters */
00222 c->bit_rate = 400000;
00223 /* resolution must be a multiple of two */
00224 c->width = 352;
00225 c->height = 288;
00226 /* frames per second */
00227 c->time_base= (AVRational){1,25};
00228 c->gop_size = 10; /* emit one intra frame every ten frames */
00229 c->max_b_frames=1;
00230 c->pix_fmt = PIX_FMT_YUV420P;
00231
00232 /* open it */
00233 if (avcodec_open(c, codec) < 0) {
00234 fprintf(stderr, "could not open codec\n");
00235 exit(1);
00236 }
00237
00238 f = fopen(filename, "wb");
00239 if (!f) {
00240 fprintf(stderr, "could not open %s\n", filename);
00241 exit(1);
00242 }
00243
00244 /* alloc image and output buffer */
00245 outbuf_size = 100000;
00246 outbuf = malloc(outbuf_size);
00247 size = c->width * c->height;
00248 picture_buf = malloc((size * 3) / 2); /* size for YUV 420 */
00249
00250 picture->data[0] = picture_buf;
00251 picture->data[1] = picture->data[0] + size;
00252 picture->data[2] = picture->data[1] + size / 4;
00253 picture->linesize[0] = c->width;
00254 picture->linesize[1] = c->width / 2;
00255 picture->linesize[2] = c->width / 2;
00256
00257 /* encode 1 second of video */
00258 for(i=0;i<25;i++) {
00259 fflush(stdout);
00260 /* prepare a dummy image */
00261 /* Y */
00262 for(y=0;y<c->height;y++) {
00263 for(x=0;x<c->width;x++) {
00264 picture->data[0][y * picture->linesize[0] + x] = x + y + i * 3;
00265 }
00266 }
00267
00268 /* Cb and Cr */
00269 for(y=0;y<c->height/2;y++) {
00270 for(x=0;x<c->width/2;x++) {
00271 picture->data[1][y * picture->linesize[1] + x] = 128 + y + i * 2;
00272 picture->data[2][y * picture->linesize[2] + x] = 64 + x + i * 5;
00273 }
00274 }
00275
00276 /* encode the image */
00277 out_size = avcodec_encode_video(c, outbuf, outbuf_size, picture);
00278 printf("encoding frame %3d (size=%5d)\n", i, out_size);
00279 fwrite(outbuf, 1, out_size, f);
00280 }
00281
00282 /* get the delayed frames */
00283 for(; out_size; i++) {
00284 fflush(stdout);
00285
00286 out_size = avcodec_encode_video(c, outbuf, outbuf_size, NULL);
00287 printf("write frame %3d (size=%5d)\n", i, out_size);
00288 fwrite(outbuf, 1, out_size, f);
00289 }
/* add sequence end code to have a real mpeg file */
00292 outbuf[0] = 0x00;
00293 outbuf[1] = 0x00;
00294 outbuf[2] = 0x01;
00295 outbuf[3] = 0xb7;
00296 fwrite(outbuf, 1, 4, f);
00297 fclose(f);
00298 free(picture_buf);
00299 free(outbuf);
00300
00301 avcodec_close(c);
00302 av_free(c);
00303 av_free(picture);
00304 printf("\n");
}
#else
/**
* put_jpeg_yuv420p_memory
* Converts an input image in the YUV420P format into a jpeg image and puts
* it in a memory buffer.
* Inputs:
* - image_size is the size of the input image buffer.
* - input_image is the image in YUV420P format.
* - width and height are the dimensions of the image
* - quality is the jpeg encoding quality 0-100%
*
* Output:
* - dest_image is a pointer to the jpeg image buffer
*
* Returns buffer size of jpeg image
*/
static int put_jpeg_yuv420p_memory(unsigned char *dest_image, int image_size,
unsigned char *input_image, int width, int height, int quality,
struct context *cnt, struct tm *tm, struct coord *box)
{
int i, j, jpeg_image_size;
JSAMPROW y[16],cb[16],cr[16]; // y[2][5] = color sample of row 2 and pixel column 5; (one plane)
JSAMPARRAY data[3]; // t[0][2][5] = color sample 0 of row 2 and column 5
struct jpeg_compress_struct cinfo;
struct jpeg_error_mgr jerr;
data[0] = y;
data[1] = cb;
data[2] = cr;
cinfo.err = jpeg_std_error(&jerr); // Errors get written to stderr
int jpeg_height = height - (height % 16);
jpeg_create_compress(&cinfo);
cinfo.image_width = width;
cinfo.image_height = jpeg_height;
cinfo.input_components = 3;
jpeg_set_defaults(&cinfo);
jpeg_set_colorspace(&cinfo, JCS_YCbCr);
cinfo.raw_data_in = TRUE; // Supply downsampled data
#if JPEG_LIB_VERSION >= 70
cinfo.do_fancy_downsampling = FALSE; // Fix segfault with v7
#endif
cinfo.comp_info[0].h_samp_factor = 2;
cinfo.comp_info[0].v_samp_factor = 2;
cinfo.comp_info[1].h_samp_factor = 1;
cinfo.comp_info[1].v_samp_factor = 1;
cinfo.comp_info[2].h_samp_factor = 1;
cinfo.comp_info[2].v_samp_factor = 1;
jpeg_set_quality(&cinfo, quality, TRUE);
cinfo.dct_method = JDCT_FASTEST;
_jpeg_mem_dest(&cinfo, dest_image, image_size); // Data written to mem
jpeg_start_compress(&cinfo, TRUE);
put_jpeg_exif(&cinfo, cnt, tm, box);
for (j = 0; j < jpeg_height; j += 16) {
for (i = 0; i < 16; i++) {
y[i] = input_image + width * (i + j);
if (i % 2 == 0) {
cb[i / 2] = input_image + width * height + width / 2 * ((i + j) /2);
cr[i / 2] = input_image + width * height + width * height / 4 + width / 2 * ((i + j) / 2);
}
}
jpeg_write_raw_data(&cinfo, data, 16);
}
jpeg_finish_compress(&cinfo);
jpeg_image_size = _jpeg_mem_size(&cinfo);
jpeg_destroy_compress(&cinfo);
return jpeg_image_size;
}
#endif
/**
* put_jpeg_grey_memory
* Converts an input image in the grayscale format into a jpeg image.
*
* Inputs:
* - image_size is the size of the input image buffer.
* - input_image is the image in grayscale format.
* - width and height are the dimensions of the image
* - quality is the jpeg encoding quality 0-100%
*
* Output:
* - dest_image is a pointer to the jpeg image buffer
*
* Returns buffer size of jpeg image.
*/
static int put_jpeg_grey_memory(unsigned char *dest_image, int image_size, unsigned char *input_image, int width, int height, int quality)
{
int y, dest_image_size;
JSAMPROW row_ptr[1];
struct jpeg_compress_struct cjpeg;
struct jpeg_error_mgr jerr;
cjpeg.err = jpeg_std_error(&jerr);
jpeg_create_compress(&cjpeg);
cjpeg.image_width = width;
cjpeg.image_height = height;
cjpeg.input_components = 1; /* One colour component */
cjpeg.in_color_space = JCS_GRAYSCALE;
jpeg_set_defaults(&cjpeg);
jpeg_set_quality(&cjpeg, quality, TRUE);
cjpeg.dct_method = JDCT_FASTEST;
_jpeg_mem_dest(&cjpeg, dest_image, image_size); // Data written to mem
jpeg_start_compress (&cjpeg, TRUE);
put_jpeg_exif(&cjpeg, NULL, NULL, NULL);
row_ptr[0] = input_image;
for (y = 0; y < height; y++) {
jpeg_write_scanlines(&cjpeg, row_ptr, 1);
row_ptr[0] += width;
}
jpeg_finish_compress(&cjpeg);
dest_image_size = _jpeg_mem_size(&cjpeg);
jpeg_destroy_compress(&cjpeg);
return dest_image_size;
}
/**
* put_jpeg_yuv420p_file
* Converts an YUV420P coded image to a jpeg image and writes
* it to an already open file.
*
* Inputs:
* - image is the image in YUV420P format.
* - width and height are the dimensions of the image
* - quality is the jpeg encoding quality 0-100%
*
* Output:
* - The jpeg is written directly to the file given by the file pointer fp
*
* Returns nothing
*/
static void put_jpeg_yuv420p_file(FILE *fp,
unsigned char *image, int width, int height,
int quality,
struct context *cnt, struct tm *tm, struct coord *box)
{
int i, j;
JSAMPROW y[16],cb[16],cr[16]; // y[2][5] = color sample of row 2 and pixel column 5; (one plane)
JSAMPARRAY data[3]; // t[0][2][5] = color sample 0 of row 2 and column 5
struct jpeg_compress_struct cinfo;
struct jpeg_error_mgr jerr;
data[0] = y;
data[1] = cb;
data[2] = cr;
cinfo.err = jpeg_std_error(&jerr); // Errors get written to stderr
jpeg_create_compress(&cinfo);
cinfo.image_width = width;
cinfo.image_height = height;
cinfo.input_components = 3;
jpeg_set_defaults(&cinfo);
jpeg_set_colorspace(&cinfo, JCS_YCbCr);
cinfo.raw_data_in = TRUE; // Supply downsampled data
#if JPEG_LIB_VERSION >= 70
cinfo.do_fancy_downsampling = FALSE; // Fix segfault with v7
#endif
cinfo.comp_info[0].h_samp_factor = 2;
cinfo.comp_info[0].v_samp_factor = 2;
cinfo.comp_info[1].h_samp_factor = 1;
cinfo.comp_info[1].v_samp_factor = 1;
cinfo.comp_info[2].h_samp_factor = 1;
cinfo.comp_info[2].v_samp_factor = 1;
jpeg_set_quality(&cinfo, quality, TRUE);
cinfo.dct_method = JDCT_FASTEST;
jpeg_stdio_dest(&cinfo, fp); // Data written to file
jpeg_start_compress(&cinfo, TRUE);
put_jpeg_exif(&cinfo, cnt, tm, box);
for (j = 0; j < height; j += 16) {
for (i = 0; i < 16; i++) {
y[i] = image + width * (i + j);
if (i % 2 == 0) {
cb[i / 2] = image + width * height + width / 2 * ((i + j) / 2);
cr[i / 2] = image + width * height + width * height / 4 + width / 2 * ((i + j) / 2);
}
}
jpeg_write_raw_data(&cinfo, data, 16);
}
jpeg_finish_compress(&cinfo);
jpeg_destroy_compress(&cinfo);
}
/**
* put_jpeg_grey_file
* Converts an greyscale image to a jpeg image and writes
* it to an already open file.
*
* Inputs:
* - image is the image in greyscale format.
* - width and height are the dimensions of the image
* - quality is the jpeg encoding quality 0-100%
* Output:
* - The jpeg is written directly to the file given by the file pointer fp
*
* Returns nothing
*/
static void put_jpeg_grey_file(FILE *picture, unsigned char *image, int width, int height, int quality)
{
int y;
JSAMPROW row_ptr[1];
struct jpeg_compress_struct cjpeg;
struct jpeg_error_mgr jerr;
cjpeg.err = jpeg_std_error(&jerr);
jpeg_create_compress(&cjpeg);
cjpeg.image_width = width;
cjpeg.image_height = height;
cjpeg.input_components = 1; /* One colour component */
cjpeg.in_color_space = JCS_GRAYSCALE;
jpeg_set_defaults(&cjpeg);
jpeg_set_quality(&cjpeg, quality, TRUE);
cjpeg.dct_method = JDCT_FASTEST;
jpeg_stdio_dest(&cjpeg, picture);
jpeg_start_compress(&cjpeg, TRUE);
put_jpeg_exif(&cjpeg, NULL, NULL, NULL);
row_ptr[0] = image;
for (y = 0; y < height; y++) {
jpeg_write_scanlines(&cjpeg, row_ptr, 1);
row_ptr[0] += width;
}
jpeg_finish_compress(&cjpeg);
jpeg_destroy_compress(&cjpeg);
}
/**
* put_ppm_bgr24_file
* Converts an greyscale image to a PPM image and writes
* it to an already open file.
* Inputs:
* - image is the image in YUV420P format.
* - width and height are the dimensions of the image
*
* Output:
* - The PPM is written directly to the file given by the file pointer fp
*
* Returns nothing
*/
static void put_ppm_bgr24_file(FILE *picture, unsigned char *image, int width, int height)
{
int x, y;
unsigned char *l = image;
unsigned char *u = image + width * height;
unsigned char *v = u + (width * height) / 4;
int r, g, b;
int warningkiller;
unsigned char rgb[3];
/*
* ppm header
* width height
* maxval
*/
fprintf(picture, "P6\n");
fprintf(picture, "%d %d\n", width, height);
fprintf(picture, "%d\n", 255);
for (y = 0; y < height; y++) {
for (x = 0; x < width; x++) {
r = 76283 * (((int)*l) - 16)+104595*(((int)*u) - 128);
g = 76283 * (((int)*l) - 16)- 53281*(((int)*u) - 128) - 25625 * (((int)*v) - 128);
b = 76283 * (((int)*l) - 16) + 132252 * (((int)*v) - 128);
r = r >> 16;
g = g >> 16;
b = b >> 16;
if (r < 0)
r = 0;
else if (r > 255)
r = 255;
if (g < 0)
g = 0;
else if (g > 255)
g = 255;
if (b < 0)
b = 0;
else if (b > 255)
b = 255;
rgb[0] = b;
rgb[1] = g;
rgb[2] = r;
l++;
if (x & 1) {
u++;
v++;
}
/* ppm is rgb not bgr */
warningkiller = fwrite(rgb, 1, 3, picture);
}
if (y & 1) {
u -= width / 2;
v -= width / 2;
}
}
}
/**
* overlay_smartmask
* Copies smartmask as an overlay into motion images and movies.
*
* Returns nothing.
*/
void overlay_smartmask(struct context *cnt, unsigned char *out)
{
int i, x, v, width, height, line;
struct images *imgs = &cnt->imgs;
unsigned char *smartmask = imgs->smartmask_final;
unsigned char *out_y, *out_u, *out_v;
i = imgs->motionsize;
v = i + ((imgs->motionsize) / 4);
width = imgs->width;
height = imgs->height;
/* Set V to 255 to make smartmask appear red. */
out_v = out + v;
out_u = out + i;
for (i = 0; i < height; i += 2) {
line = i * width;
for (x = 0; x < width; x += 2) {
if (smartmask[line + x] == 0 || smartmask[line + x + 1] == 0 ||
smartmask[line + width + x] == 0 ||
smartmask[line + width + x + 1] == 0) {
*out_v = 255;
*out_u = 128;
}
out_v++;
out_u++;
}
}
out_y = out;
/* Set colour intensity for smartmask. */
for (i = 0; i < imgs->motionsize; i++) {
if (smartmask[i] == 0)
*out_y = 0;
out_y++;
}
}
/**
* overlay_fixed_mask
* Copies fixed mask as green overlay into motion images and movies.
*
* Returns nothing.
*/
void overlay_fixed_mask(struct context *cnt, unsigned char *out)
{
int i, x, v, width, height, line;
struct images *imgs = &cnt->imgs;
unsigned char *mask = imgs->mask;
unsigned char *out_y, *out_u, *out_v;
i = imgs->motionsize;
v = i + ((imgs->motionsize) / 4);
width = imgs->width;
height = imgs->height;
/* Set U and V to 0 to make fixed mask appear green. */
out_v = out + v;
out_u = out + i;
for (i = 0; i < height; i += 2) {
line = i * width;
for (x = 0; x < width; x += 2) {
if (mask[line + x] == 0 || mask[line + x + 1] == 0 ||
mask[line + width + x] == 0 ||
mask[line + width + x + 1] == 0) {
*out_v = 0;
*out_u = 0;
}
out_v++;
out_u++;
}
}
out_y = out;
/* Set colour intensity for mask. */
for (i = 0; i < imgs->motionsize; i++) {
if (mask[i] == 0)
*out_y = 0;
out_y++;
}
}
/**
* overlay_largest_label
* Copies largest label as an overlay into motion images and movies.
*
* Returns nothing.
*/
void overlay_largest_label(struct context *cnt, unsigned char *out)
{
int i, x, v, width, height, line;
struct images *imgs = &cnt->imgs;
int *labels = imgs->labels;
unsigned char *out_y, *out_u, *out_v;
i = imgs->motionsize;
v = i + ((imgs->motionsize) / 4);
width = imgs->width;
height = imgs->height;
/* Set U to 255 to make label appear blue. */
out_u = out + i;
out_v = out + v;
for (i = 0; i < height; i += 2) {
line = i * width;
for (x = 0; x < width; x += 2) {
if (labels[line + x] & 32768 || labels[line + x + 1] & 32768 ||
labels[line + width + x] & 32768 ||
labels[line + width + x + 1] & 32768) {
*out_u = 255;
*out_v = 128;
}
out_u++;
out_v++;
}
}
out_y = out;
/* Set intensity for coloured label to have better visibility. */
for (i = 0; i < imgs->motionsize; i++) {
if (*labels++ & 32768)
*out_y = 0;
out_y++;
}
}
/**
* put_picture_mem
* Is used for the webcam feature. Depending on the image type
* (colour YUV420P or greyscale) the corresponding put_jpeg_X_memory function is called.
* Inputs:
* - cnt is the global context struct and only cnt->imgs.type is used.
* - image_size is the size of the input image buffer