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/*
* -- http://android-fb2png.googlecode.com/svn/trunk/adb_screenshoot.c --
*
* Copyright 2011, Kyan He <kyan.ql.he@gmail.com>
*
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <netdb.h>
#include <netinet/in.h>
#include "fb.h"
#include "log.h"
#define DEFAULT_SAVE_PATH "fbdump.png"
/* defined in $T/system/core/adb/framebuffer_service.c */
#define DDMS_RAWIMAGE_VERSION 1
struct fbinfo {
unsigned int version;
unsigned int bpp;
unsigned int size;
unsigned int width;
unsigned int height;
unsigned int red_offset;
unsigned int red_length;
unsigned int blue_offset;
unsigned int blue_length;
unsigned int green_offset;
unsigned int green_length;
unsigned int alpha_offset;
unsigned int alpha_length;
} __attribute__((packed));
static int remote_socket(const char *host, int port)
{
struct sockaddr_in sa;
struct hostent *hp;
int s;
if(!(hp = gethostbyname(host))){ return -1; }
memset(&sa, 0, sizeof(sa));
sa.sin_port = htons(port);
sa.sin_family = hp->h_addrtype;
memcpy((void*) &sa.sin_addr, (void*) hp->h_addr, hp->h_length);
if((s = socket(hp->h_addrtype, SOCK_STREAM, 0)) < 0) {
return -1;
}
if(connect(s, (struct sockaddr*) &sa, sizeof(sa)) != 0){
close(s);
return -1;
}
return s;
}
char *target = "usb";
static int adb_fd;
/**
* Write command through adb protocol.
* Return
* Bytes have been wrote.
*/
static int adb_write(const char *cmd)
{
char buf[1024];
int sz;
/* Construct command. */
sz = sprintf(buf, "%04x%s", strlen(cmd), cmd);
write(adb_fd, buf, sz);
#if 0
D("<< %s", buf);
#endif
return sz;
}
/**
* Read data through adb protocol.
* Return
* Bytes have been read.
*/
static int adb_read(char *buf, int sz)
{
sz = read(adb_fd, buf, sz);
if (sz < 0) {
E("Fail to read from adb socket, %s", strerror(errno));
}
buf[sz] = '\0';
#if 0
D(">> %d", sz);
#endif
return sz;
}
static int get_fb_from_adb(struct fb *fb)
{
char buf[1024];
const struct fbinfo* fbinfo;
/* Init socket */
adb_fd = remote_socket("localhost", 5037);
if (adb_fd < 0) {
E("Fail to create socket, %s", strerror(errno));
}
adb_write("host:transport-");
adb_read(buf, 1024);
adb_write("framebuffer:");
adb_read(buf, 1024);
/* Parse FB header. */
adb_read(buf, sizeof(struct fbinfo));
fbinfo = (struct fbinfo*) buf;
if (fbinfo->version != DDMS_RAWIMAGE_VERSION) {
E("unspport adb version");
}
/* Assemble struct fb */
memcpy(fb, &fbinfo->bpp, sizeof(struct fbinfo) - 4);
fb_dump(fb);
fb->data = malloc(fb->size);
if (!fb->data) return -1;
/* Read out the whole framebuffer */
int bytes_read = 0;
while (bytes_read < fb->size) {
bytes_read += adb_read(fb->data + bytes_read, fb->size - bytes_read);
}
return 0;
}
int fb2png(const char* path)
{
struct fb fb;
if (get_fb_from_adb(&fb)) {
D("cannot get framebuffer.");
return -1;
}
return fb_save_png(&fb, path);
}
int main(int argc, char *argv[])
{
char fn[128];
if (argc == 2) {
//if (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help")) {
if (argv[1][0] == '-') {
printf(
"Usage: fb2png [path/to/output.png]\n"
" The default output path is ./fbdump.png\n"
);
exit(0);
} else {
sprintf(fn, "%s", argv[1]);
}
} else {
sprintf(fn, "%s", DEFAULT_SAVE_PATH);
}
return fb2png(fn);
}
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