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/*
* Copyright © 2012 Intel Corporation
*
* Permission to use, copy, modify, distribute, and sell this software and
* its documentation for any purpose is hereby granted without fee, provided
* that the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of the copyright holders not be used in
* advertising or publicity pertaining to distribution of the software
* without specific, written prior permission. The copyright holders make
* no representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <sys/mman.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <assert.h>
#include <cairo.h>
#include "wcap-decode.h"
static void
write_png(struct wcap_decoder *decoder, const char *filename)
{
cairo_surface_t *surface;
surface = cairo_image_surface_create_for_data((unsigned char *) decoder->frame,
CAIRO_FORMAT_ARGB32,
decoder->width,
decoder->height,
decoder->width * 4);
cairo_surface_write_to_png(surface, filename);
cairo_surface_destroy(surface);
}
static inline int
rgb_to_yuv(uint32_t format, uint32_t p, int *u, int *v)
{
int r, g, b, y;
switch (format) {
case WCAP_FORMAT_XRGB8888:
r = (p >> 16) & 0xff;
g = (p >> 8) & 0xff;
b = (p >> 0) & 0xff;
break;
case WCAP_FORMAT_XBGR8888:
r = (p >> 0) & 0xff;
g = (p >> 8) & 0xff;
b = (p >> 16) & 0xff;
break;
default:
assert(0);
}
y = (19595 * r + 38469 * g + 7472 * b) >> 16;
if (y > 255)
y = 255;
*u += 46727 * (r - y);
*v += 36962 * (b - y);
return y;
}
static inline
int clamp_uv(int u)
{
int clamp = (u >> 18) + 128;
if (clamp < 0)
return 0;
else if (clamp > 255)
return 255;
else
return clamp;
}
static void
convert_to_yv12(struct wcap_decoder *decoder, unsigned char *out)
{
unsigned char *y1, *y2, *u, *v;
uint32_t *p1, *p2, *end;
int i, u_accum, v_accum, stride0, stride1;
uint32_t format = decoder->format;
stride0 = decoder->width;
stride1 = decoder->width / 2;
for (i = 0; i < decoder->height; i += 2) {
y1 = out + stride0 * i;
y2 = y1 + stride0;
v = out + stride0 * decoder->height + stride1 * i / 2;
u = v + stride1 * decoder->height / 2;
p1 = decoder->frame + decoder->width * i;
p2 = p1 + decoder->width;
end = p1 + decoder->width;
while (p1 < end) {
u_accum = 0;
v_accum = 0;
y1[0] = rgb_to_yuv(format, p1[0], &u_accum, &v_accum);
y1[1] = rgb_to_yuv(format, p1[1], &u_accum, &v_accum);
y2[0] = rgb_to_yuv(format, p2[0], &u_accum, &v_accum);
y2[1] = rgb_to_yuv(format, p2[1], &u_accum, &v_accum);
u[0] = clamp_uv(u_accum);
v[0] = clamp_uv(v_accum);
y1 += 2;
p1 += 2;
y2 += 2;
p2 += 2;
u++;
v++;
}
}
}
static void
output_yuv_frame(struct wcap_decoder *decoder)
{
static unsigned char *out;
int size;
size = decoder->width * decoder->height * 3 / 2;
if (out == NULL)
out = malloc(size);
convert_to_yv12(decoder, out);
printf("FRAME\n");
fwrite(out, 1, size, stdout);
}
static void
usage(int exit_code)
{
fprintf(stderr, "usage: wcap-snapshot "
"[--help] [--yuv4mpeg2] [--frame=<frame>] [--all] \n"
"\t[--rate=<num:denom>] <wcap file>\n\n"
"\t--help\t\t\tthis help text\n"
"\t--yuv2mpeg4\t\tdump wcap file in yuv4mpeg format\n"
"\t--frame=<frame>\t\twrite out the given frame number as png\n"
"\t--all\t\t\twrite all frames as pngs\n"
"\t--rate=<num:denom>\treplay frame rate for yuv4mpeg2,\n"
"\t\t\t\tspecified as an integer fraction\n\n");
exit(exit_code);
}
int main(int argc, char *argv[])
{
struct wcap_decoder *decoder;
int i, j, output_frame = -1, yuv4mpeg2 = 0, all = 0, has_frame;
int num = 30, denom = 1;
char filename[200];
uint32_t msecs, frame_time, *frame, frame_size;
for (i = 1, j = 1; i < argc; i++) {
if (strcmp(argv[i], "--yuv4mpeg2") == 0) {
yuv4mpeg2 = 1;
} else if (strcmp(argv[i], "--help") == 0) {
usage(EXIT_SUCCESS);
} else if (strcmp(argv[i], "--all") == 0) {
all = 1;
} else if (sscanf(argv[i], "--frame=%d", &output_frame) == 1) {
;
} else if (sscanf(argv[i], "--rate=%d", &num) == 1) {
;
} else if (sscanf(argv[i], "--rate=%d:%d", &num, &denom) == 2) {
;
} else if (strcmp(argv[i], "--") == 0) {
break;
} else if (argv[i][0] == '-') {
fprintf(stderr,
"unknown option or invalid argument: %s\n", argv[i]);
usage(EXIT_FAILURE);
} else {
argv[j++] = argv[i];
}
}
argc = j;
if (argc != 2)
usage(EXIT_FAILURE);
if (denom == 0) {
fprintf(stderr, "invalid rate, denom can not be 0\n");
exit(EXIT_FAILURE);
}
decoder = wcap_decoder_create(argv[1]);
if (yuv4mpeg2) {
printf("YUV4MPEG2 C420jpeg W%d H%d F%d:%d Ip A0:0\n",
decoder->width, decoder->height, num, denom);
fflush(stdout);
}
i = 0;
has_frame = wcap_decoder_get_frame(decoder);
msecs = decoder->msecs;
frame_time = 1000 * denom / num;
frame_size = decoder->width * decoder->height * 4;
frame = malloc(frame_size);
while (has_frame) {
if (decoder->msecs >= msecs)
memcpy(frame, decoder->frame, frame_size);
if (all || i == output_frame) {
snprintf(filename, sizeof filename,
"wcap-frame-%d.png", i);
write_png(decoder, filename);
fprintf(stderr, "wrote %s\n", filename);
}
if (yuv4mpeg2)
output_yuv_frame(decoder);
i++;
msecs += frame_time;
while (decoder->msecs < msecs && has_frame)
has_frame = wcap_decoder_get_frame(decoder);
}
fprintf(stderr, "wcap file: size %dx%d, %d frames\n",
decoder->width, decoder->height, i);
wcap_decoder_destroy(decoder);
return EXIT_SUCCESS;
}
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