Android/scrcpy
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Rename screen -> scrcpy -> main

Browse source 
Rename scrcpy.c to main.c (this file handles the command line parsing),
and screen.c to scrcpy.c (it exposes the entry point scrcpy()).
This commit is contained in:
Romain Vimont 2018-01-23 16:32:29 +01:00
parent 8984c1a7c4
commit 2c35220618
5 changed files with 592 additions and 592 deletions
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4
app/meson.build
View file

@ -1,7 +1,7 @@
project('scrcpy-app', 'c')
src = [
'src/scrcpy.c',
'src/main.c',
'src/command.c',
'src/control.c',
'src/controlevent.c',
@ -10,7 +10,7 @@ src = [
'src/frames.c',
'src/lockutil.c',
'src/netutil.c',
'src/screen.c',
'src/scrcpy.c',
'src/server.c',
'src/strutil.c',
]

73
app/src/main.c Normal file
View file

@ -0,0 +1,73 @@
#include "scrcpy.h"
#include <unistd.h>
#include <libavformat/avformat.h>
#include <SDL2/SDL.h>
#define DEFAULT_LOCAL_PORT 27183
struct args {
const char *serial;
Uint16 port;
};
int parse_args(struct args *args, int argc, char *argv[]) {
int c;
while ((c = getopt(argc, argv, "p:")) != -1) {
switch (c) {
case 'p': {
char *endptr;
long int value = strtol(optarg, &endptr, 0);
if (*optarg == '\0' || *endptr != '\0') {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Invalid port: %s\n", optarg);
return -1;
}
if (value & ~0xffff) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Port out of range: %ld\n", value);
return -1;
}
args->port = (Uint16) value;
break;
}
default:
// getopt prints the error message on stderr
return -1;
}
}
int index = optind;
if (index < argc) {
args->serial = argv[index++];
}
if (index < argc) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Unexpected additional argument: %s\n", argv[index]);
return -1;
}
return 0;
}
int main(int argc, char *argv[]) {
int res;
struct args args = {
.serial = NULL,
.port = DEFAULT_LOCAL_PORT,
};
if (parse_args(&args, argc, argv)) {
return 1;
}
av_register_all();
if (avformat_network_init()) {
return 1;
}
SDL_LogSetAllPriority(SDL_LOG_PRIORITY_DEBUG);
res = scrcpy(args.serial, args.port) ? 0 : 1;
avformat_network_deinit(); // ignore failure
return res;
}

565
app/src/scrcpy.c
View file

@ -1,73 +1,540 @@
#include "screen.h"
#include "scrcpy.h"
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <libavformat/avformat.h>
#include <sys/time.h>
#include <SDL2/SDL.h>
#include <SDL2/SDL_net.h>
#define DEFAULT_LOCAL_PORT 27183
#include "command.h"
#include "common.h"
#include "control.h"
#include "convert.h"
#include "decoder.h"
#include "events.h"
#include "frames.h"
#include "lockutil.h"
#include "netutil.h"
#include "server.h"
struct args {
const char *serial;
Uint16 port;
};
#define DEVICE_NAME_FIELD_LENGTH 64
#define DISPLAY_MARGINS 96
int parse_args(struct args *args, int argc, char *argv[]) {
int c;
while ((c = getopt(argc, argv, "p:")) != -1) {
switch (c) {
case 'p': {
char *endptr;
long int value = strtol(optarg, &endptr, 0);
if (*optarg == '\0' || *endptr != '\0') {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Invalid port: %s\n", optarg);
return -1;
}
if (value & ~0xffff) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Port out of range: %ld\n", value);
return -1;
}
args->port = (Uint16) value;
break;
static struct frames frames;
static struct decoder decoder;
static struct controller controller;
static SDL_Window *window;
static SDL_Renderer *renderer;
static SDL_Texture *texture;
static struct size frame_size;
static SDL_bool texture_empty = SDL_TRUE;
static SDL_bool fullscreen = SDL_FALSE;
static long timestamp_ms(void) {
struct timeval tv;
gettimeofday(&tv, NULL);
return tv.tv_sec * 1000 + tv.tv_usec / 1000;
}
static void count_frame(void) {
static long ts = 0;
static int nbframes = 0;
long now = timestamp_ms();
++nbframes;
if (now - ts > 1000) {
SDL_LogDebug(SDL_LOG_CATEGORY_APPLICATION, "%d fps", nbframes);
ts = now;
nbframes = 0;
}
}
static TCPsocket listen_on_port(Uint16 port) {
IPaddress addr = {
.host = INADDR_ANY,
.port = SDL_SwapBE16(port),
};
return SDLNet_TCP_Open(&addr);
}
// name must be at least DEVICE_NAME_FIELD_LENGTH bytes
SDL_bool read_initial_device_info(TCPsocket socket, char *device_name, struct size *size) {
unsigned char buf[DEVICE_NAME_FIELD_LENGTH + 4];
if (SDLNet_TCP_Recv(socket, buf, sizeof(buf)) <= 0) {
return SDL_FALSE;
}
buf[DEVICE_NAME_FIELD_LENGTH - 1] = '\0'; // in case the client sends garbage
// scrcpy is safe here, since name contains at least DEVICE_NAME_FIELD_LENGTH bytes
// and strlen(buf) < DEVICE_NAME_FIELD_LENGTH
strcpy(device_name, (char *) buf);
size->width = (buf[DEVICE_NAME_FIELD_LENGTH] << 8) | buf[DEVICE_NAME_FIELD_LENGTH + 1];
size->height = (buf[DEVICE_NAME_FIELD_LENGTH + 2] << 8) | buf[DEVICE_NAME_FIELD_LENGTH + 3];
return SDL_TRUE;
}
#if SDL_VERSION_ATLEAST(2, 0, 5)
# define GET_DISPLAY_BOUNDS(i, r) SDL_GetDisplayUsableBounds((i), (r))
#else
# define GET_DISPLAY_BOUNDS(i, r) SDL_GetDisplayBounds((i), (r))
#endif
// init the preferred display_bounds (i.e. the screen bounds with some margins)
static SDL_bool get_preferred_display_bounds(struct size *bounds) {
SDL_Rect rect;
if (GET_DISPLAY_BOUNDS(0, &rect)) {
SDL_LogWarn(SDL_LOG_CATEGORY_SYSTEM, "Could not get display usable bounds: %s", SDL_GetError());
return SDL_FALSE;
}
bounds->width = MAX(0, rect.w - DISPLAY_MARGINS);
bounds->height = MAX(0, rect.h - DISPLAY_MARGINS);
return SDL_TRUE;
}
static inline struct size get_window_size(SDL_Window *window) {
int width;
int height;
SDL_GetWindowSize(window, &width, &height);
struct size size;
size.width = width;
size.height = height;
return size;
}
static inline struct position get_mouse_position() {
int x;
int y;
SDL_GetMouseState(&x, &y);
SDL_assert_release(x >= 0 && x < 0x10000 && y >= 0 && y < 0x10000);
return (struct position) {
.x = (Uint16) x,
.y = (Uint16) y,
};
}
// return the optimal size of the window, with the following constraints:
// - it attempts to keep at least one dimension of the current_size (i.e. it crops the black borders)
// - it keeps the aspect ratio
// - it scales down to make it fit in the display_size
// TODO unit test
static struct size get_optimal_size(struct size current_size, struct size frame_size) {
struct size display_size;
// 32 bits because we need to multiply two 16 bits values
Uint32 w;
Uint32 h;
if (!get_preferred_display_bounds(&display_size)) {
// cannot get display bounds, do not constraint the size
w = current_size.width;
h = current_size.height;
} else {
w = MIN(current_size.width, display_size.width);
h = MIN(current_size.height, display_size.height);
}
SDL_bool keep_width = frame_size.width * h > frame_size.height * w;
if (keep_width) {
// remove black borders on top and bottom
h = frame_size.height * w / frame_size.width;
} else {
// remove black borders on left and right (or none at all if it already fits)
w = frame_size.width * h / frame_size.height;
}
// w and h must fit into 16 bits
SDL_assert_release(w < 0x10000 && h < 0x10000);
return (struct size) {w, h};
}
// initially, there is no current size, so use the frame size as current size
static inline struct size get_initial_optimal_size(struct size frame_size) {
return get_optimal_size(frame_size, frame_size);
}
// same as get_optimal_size(), but read the current size from the window
static inline struct size get_optimal_window_size(SDL_Window *window, struct size frame_size) {
struct size current_size = get_window_size(window);
return get_optimal_size(current_size, frame_size);
}
static inline SDL_bool prepare_for_frame(SDL_Window *window, SDL_Renderer *renderer, SDL_Texture **texture,
struct size old_frame_size, struct size frame_size) {
(void) window; // might be used to resize the window automatically
if (old_frame_size.width != frame_size.width || old_frame_size.height != frame_size.height) {
if (SDL_RenderSetLogicalSize(renderer, frame_size.width, frame_size.height)) {
SDL_LogError(SDL_LOG_CATEGORY_RENDER, "Could not set renderer logical size: %s", SDL_GetError());
return SDL_FALSE;
}
default:
// getopt prints the error message on stderr
return -1;
// frame dimension changed, destroy texture
SDL_DestroyTexture(*texture);
struct size current_size = get_window_size(window);
struct size target_size = {
(Uint32) current_size.width * frame_size.width / old_frame_size.width,
(Uint32) current_size.height * frame_size.height / old_frame_size.height,
};
target_size = get_optimal_size(target_size, frame_size);
SDL_SetWindowSize(window, target_size.width, target_size.height);
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION, "New texture: %" PRIu16 "x%" PRIu16, frame_size.width, frame_size.height);
*texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_YV12, SDL_TEXTUREACCESS_STREAMING, frame_size.width, frame_size.height);
if (!*texture) {
SDL_LogCritical(SDL_LOG_CATEGORY_RENDER, "Could not create texture: %s", SDL_GetError());
return SDL_FALSE;
}
}
int index = optind;
if (index < argc) {
args->serial = argv[index++];
return SDL_TRUE;
}
static void update_texture(const AVFrame *frame, SDL_Texture *texture) {
SDL_UpdateYUVTexture(texture, NULL,
frame->data[0], frame->linesize[0],
frame->data[1], frame->linesize[1],
frame->data[2], frame->linesize[2]);
}
static void render(SDL_Renderer *renderer, SDL_Texture *texture) {
SDL_RenderClear(renderer);
if (texture) {
SDL_RenderCopy(renderer, texture, NULL, NULL);
}
if (index < argc) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Unexpected additional argument: %s\n", argv[index]);
SDL_RenderPresent(renderer);
}
static int wait_for_success(process_t proc, const char *name) {
if (proc == PROCESS_NONE) {
SDL_LogError(SDL_LOG_CATEGORY_SYSTEM, "Could not execute \"%s\"", name);
return -1;
}
exit_code_t exit_code;
if (!cmd_simple_wait(proc, &exit_code)) {
if (exit_code != NO_EXIT_CODE) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "\"%s\" returned with value %" PRIexitcode, name, exit_code);
} else {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "\"%s\" exited unexpectedly", name);
}
return -1;
}
return 0;
}
int main(int argc, char *argv[]) {
int res;
struct args args = {
.serial = NULL,
.port = DEFAULT_LOCAL_PORT,
};
if (parse_args(&args, argc, argv)) {
return 1;
static SDL_bool handle_new_frame(void) {
mutex_lock(frames.mutex);
AVFrame *frame = frames.rendering_frame;
frames.rendering_frame_consumed = SDL_TRUE;
if (!decoder.skip_frames) {
cond_signal(frames.rendering_frame_consumed_cond);
}
av_register_all();
if (avformat_network_init()) {
return 1;
struct size current_frame_size = {frame->width, frame->height};
if (!prepare_for_frame(window, renderer, &texture, frame_size, current_frame_size)) {
return SDL_FALSE;
}
SDL_LogSetAllPriority(SDL_LOG_PRIORITY_DEBUG);
frame_size = current_frame_size;
res = show_screen(args.serial, args.port) ? 0 : 1;
update_texture(frame, texture);
mutex_unlock(frames.mutex);
avformat_network_deinit(); // ignore failure
return res;
render(renderer, texture);
return SDL_TRUE;
}
static void handle_text_input(const SDL_TextInputEvent *event) {
struct control_event control_event;
control_event.type = CONTROL_EVENT_TYPE_TEXT;
strncpy(control_event.text_event.text, event->text, TEXT_MAX_LENGTH);
control_event.text_event.text[TEXT_MAX_LENGTH] = '\0';
if (!controller_push_event(&controller, &control_event)) {
SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION, "Cannot send text event");
}
}
static void handle_key(const SDL_KeyboardEvent *event) {
SDL_Keycode keycode = event->keysym.sym;
SDL_bool ctrl = event->keysym.mod & (KMOD_LCTRL | KMOD_RCTRL);
SDL_bool shift = event->keysym.mod & (KMOD_LSHIFT | KMOD_RSHIFT);
SDL_bool repeat = event->repeat;
// Capture Ctrl+x: optimal size
if (keycode == SDLK_x && !repeat && ctrl && !shift) {
if (event->type == SDL_KEYDOWN) {
struct size optimal_size = get_optimal_window_size(window, frame_size);
SDL_SetWindowSize(window, optimal_size.width, optimal_size.height);
}
return;
}
// Capture Ctrl+f: switch fullscreen
if (keycode == SDLK_f && !repeat && ctrl && !shift) {
if (event->type == SDL_KEYDOWN) {
Uint32 new_mode = fullscreen ? 0 : SDL_WINDOW_FULLSCREEN_DESKTOP;
if (!SDL_SetWindowFullscreen(window, new_mode)) {
fullscreen = !fullscreen;
render(renderer, texture_empty ? NULL : texture);
} else {
SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION, "Could not switch fullscreen mode: %s", SDL_GetError());
}
}
return;
}
struct control_event control_event;
if (input_key_from_sdl_to_android(event, &control_event)) {
if (!controller_push_event(&controller, &control_event)) {
SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION, "Cannot send control event");
}
}
}
static void handle_mouse_motion(const SDL_MouseMotionEvent *event, struct size screen_size) {
struct control_event control_event;
if (mouse_motion_from_sdl_to_android(event, screen_size, &control_event)) {
if (!controller_push_event(&controller, &control_event)) {
SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION, "Cannot send mouse motion event");
}
}
}
static void handle_mouse_button(const SDL_MouseButtonEvent *event, struct size screen_size) {
struct control_event control_event;
if (mouse_button_from_sdl_to_android(event, screen_size, &control_event)) {
if (!controller_push_event(&controller, &control_event)) {
SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION, "Cannot send mouse button event");
}
}
}
static void handle_mouse_wheel(const SDL_MouseWheelEvent *event, struct point point) {
struct control_event control_event;
if (mouse_wheel_from_sdl_to_android(event, point, &control_event)) {
if (!controller_push_event(&controller, &control_event)) {
SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION, "Cannot send wheel button event");
}
}
}
void event_loop(void) {
SDL_Event event;
while (SDL_WaitEvent(&event)) {
switch (event.type) {
case EVENT_DECODER_STOPPED:
SDL_LogDebug(SDL_LOG_CATEGORY_APPLICATION, "Video decoder stopped");
case SDL_QUIT:
return;
case EVENT_NEW_FRAME:
if (!handle_new_frame()) {
return;
}
texture_empty = SDL_FALSE;
count_frame(); // display fps for debug
break;
case SDL_WINDOWEVENT:
switch (event.window.event) {
case SDL_WINDOWEVENT_EXPOSED:
case SDL_WINDOWEVENT_SIZE_CHANGED:
render(renderer, texture_empty ? NULL : texture);
break;
}
break;
case SDL_TEXTINPUT: {
handle_text_input(&event.text);
break;
}
case SDL_KEYDOWN:
case SDL_KEYUP:
handle_key(&event.key);
break;
case SDL_MOUSEMOTION:
handle_mouse_motion(&event.motion, frame_size);
break;
case SDL_MOUSEWHEEL: {
struct point point = {
.screen_size = frame_size,
.position = get_mouse_position(),
};
handle_mouse_wheel(&event.wheel, point);
break;
}
case SDL_MOUSEBUTTONDOWN:
case SDL_MOUSEBUTTONUP: {
handle_mouse_button(&event.button, frame_size);
break;
}
}
}
}
SDL_bool scrcpy(const char *serial, Uint16 local_port) {
SDL_bool ret = 0;
process_t push_proc = push_server(serial);
if (wait_for_success(push_proc, "adb push")) {
return SDL_FALSE;
}
process_t reverse_tunnel_proc = enable_tunnel(serial, local_port);
if (wait_for_success(reverse_tunnel_proc, "adb reverse")) {
return SDL_FALSE;
}
TCPsocket server_socket = listen_on_port(local_port);
if (!server_socket) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Could not open video socket");
goto screen_finally_adb_reverse_remove;
}
// server will connect to our socket
process_t server = start_server(serial);
if (server == PROCESS_NONE) {
ret = SDL_FALSE;
SDLNet_TCP_Close(server_socket);
goto screen_finally_adb_reverse_remove;
}
// to reduce startup time, we could be tempted to init other stuff before blocking here
// but we should not block after SDL_Init since it handles the signals (Ctrl+C) in its
// event loop: blocking could lead to deadlock
TCPsocket device_socket = blocking_accept(server_socket);
// we don't need the server socket anymore
SDLNet_TCP_Close(server_socket);
if (!device_socket) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Could not accept video socket: %s", SDL_GetError());
ret = SDL_FALSE;
stop_server(server);
goto screen_finally_adb_reverse_remove;
}
char device_name[DEVICE_NAME_FIELD_LENGTH];
// screenrecord does not send frames when the screen content does not change
// therefore, we transmit the screen size before the video stream, to be able
// to init the window immediately
if (!read_initial_device_info(device_socket, device_name, &frame_size)) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Could not retrieve initial screen size");
ret = SDL_FALSE;
SDLNet_TCP_Close(device_socket);
stop_server(server);
goto screen_finally_adb_reverse_remove;
}
if (!frames_init(&frames)) {
ret = SDL_FALSE;
SDLNet_TCP_Close(device_socket);
stop_server(server);
goto screen_finally_adb_reverse_remove;
}
decoder.frames = &frames;
decoder.video_socket = device_socket;
decoder.skip_frames = SDL_TRUE;
// now we consumed the header values, the socket receives the video stream
// start the decoder
if (!decoder_start(&decoder)) {
ret = SDL_FALSE;
SDLNet_TCP_Close(device_socket);
stop_server(server);
goto screen_finally_destroy_frames;
}
if (!controller_init(&controller, device_socket)) {
ret = SDL_FALSE;
SDLNet_TCP_Close(device_socket);
stop_server(server);
goto screen_finally_stop_decoder;
}
if (!controller_start(&controller)) {
ret = SDL_FALSE;
SDLNet_TCP_Close(device_socket);
stop_server(server);
goto screen_finally_destroy_controller;
}
if (SDL_Init(SDL_INIT_VIDEO)) {
SDL_LogCritical(SDL_LOG_CATEGORY_APPLICATION, "Could not initialize SDL: %s", SDL_GetError());
ret = SDL_FALSE;
goto screen_finally_stop_and_join_controller;
}
// FIXME it may crash in SDL_Quit in i965_dri.so
// As a workaround, do not call SDL_Quit() (we are exiting anyway).
// atexit(SDL_Quit);
// Bilinear resizing
if (!SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "1")) {
SDL_LogWarn(SDL_LOG_CATEGORY_VIDEO, "Could not enable bilinear filtering");
}
struct size window_size = get_initial_optimal_size(frame_size);
window = SDL_CreateWindow(device_name, SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
window_size.width, window_size.height, SDL_WINDOW_SHOWN | SDL_WINDOW_RESIZABLE);
if (!window) {
SDL_LogCritical(SDL_LOG_CATEGORY_SYSTEM, "Could not create window: %s", SDL_GetError());
ret = SDL_FALSE;
goto screen_finally_stop_decoder;
}
renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
if (!renderer) {
SDL_LogCritical(SDL_LOG_CATEGORY_RENDER, "Could not create renderer: %s", SDL_GetError());
ret = SDL_FALSE;
goto screen_finally_destroy_window;
}
if (SDL_RenderSetLogicalSize(renderer, frame_size.width, frame_size.height)) {
SDL_LogError(SDL_LOG_CATEGORY_RENDER, "Could not set renderer logical size: %s", SDL_GetError());
ret = SDL_FALSE;
goto screen_finally_destroy_renderer;
}
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION, "Initial texture: %" PRIu16 "x%" PRIu16, frame_size.width, frame_size.height);
texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_YV12, SDL_TEXTUREACCESS_STREAMING, frame_size.width, frame_size.height);
if (!texture) {
SDL_LogCritical(SDL_LOG_CATEGORY_RENDER, "Could not create texture: %s", SDL_GetError());
ret = SDL_FALSE;
goto screen_finally_destroy_renderer;
}
SDL_RenderClear(renderer);
SDL_RenderPresent(renderer);
event_loop();
SDL_LogDebug(SDL_LOG_CATEGORY_APPLICATION, "quit...");
SDL_DestroyTexture(texture);
screen_finally_destroy_renderer:
// FIXME it may crash at exit if we destroy the renderer or the window,
// with the exact same stack trace as <https://bugs.launchpad.net/mir/+bug/1466535>.
// As a workaround, leak the renderer and the window (we are exiting anyway).
//SDL_DestroyRenderer(renderer);
screen_finally_destroy_window:
//SDL_DestroyWindow(window);
screen_finally_stop_and_join_controller:
controller_stop(&controller);
controller_join(&controller);
screen_finally_destroy_controller:
controller_destroy(&controller);
screen_finally_stop_decoder:
SDLNet_TCP_Close(device_socket);
// kill the server before decoder_join() to wake up the decoder
stop_server(server);
decoder_join(&decoder);
screen_finally_destroy_frames:
frames_destroy(&frames);
screen_finally_adb_reverse_remove:
{
process_t remove = disable_tunnel(serial);
if (remove != PROCESS_NONE) {
// ignore failure
cmd_simple_wait(remove, NULL);
}
}
return ret;
}

2
app/src/screen.h → app/src/scrcpy.h
View file

@ -3,6 +3,6 @@
#include <SDL2/SDL_stdinc.h>
SDL_bool show_screen(const char *serial, Uint16 local_port);
SDL_bool scrcpy(const char *serial, Uint16 local_port);
#endif

540
app/src/screen.c
View file

@ -1,540 +0,0 @@
#include "screen.h"
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <libavformat/avformat.h>
#include <sys/time.h>
#include <SDL2/SDL.h>
#include <SDL2/SDL_net.h>
#include "command.h"
#include "common.h"
#include "control.h"
#include "convert.h"
#include "decoder.h"
#include "events.h"
#include "frames.h"
#include "lockutil.h"
#include "netutil.h"
#include "server.h"
#define DEVICE_NAME_FIELD_LENGTH 64
#define DISPLAY_MARGINS 96
static struct frames frames;
static struct decoder decoder;
static struct controller controller;
static SDL_Window *window;
static SDL_Renderer *renderer;
static SDL_Texture *texture;
static struct size frame_size;
static SDL_bool texture_empty = SDL_TRUE;
static SDL_bool fullscreen = SDL_FALSE;
static long timestamp_ms(void) {
struct timeval tv;
gettimeofday(&tv, NULL);
return tv.tv_sec * 1000 + tv.tv_usec / 1000;
}
static void count_frame(void) {
static long ts = 0;
static int nbframes = 0;
long now = timestamp_ms();
++nbframes;
if (now - ts > 1000) {
SDL_LogDebug(SDL_LOG_CATEGORY_APPLICATION, "%d fps", nbframes);
ts = now;
nbframes = 0;
}
}
static TCPsocket listen_on_port(Uint16 port) {
IPaddress addr = {
.host = INADDR_ANY,
.port = SDL_SwapBE16(port),
};
return SDLNet_TCP_Open(&addr);
}
// name must be at least DEVICE_NAME_FIELD_LENGTH bytes
SDL_bool read_initial_device_info(TCPsocket socket, char *device_name, struct size *size) {
unsigned char buf[DEVICE_NAME_FIELD_LENGTH + 4];
if (SDLNet_TCP_Recv(socket, buf, sizeof(buf)) <= 0) {
return SDL_FALSE;
}
buf[DEVICE_NAME_FIELD_LENGTH - 1] = '\0'; // in case the client sends garbage
// scrcpy is safe here, since name contains at least DEVICE_NAME_FIELD_LENGTH bytes
// and strlen(buf) < DEVICE_NAME_FIELD_LENGTH
strcpy(device_name, (char *) buf);
size->width = (buf[DEVICE_NAME_FIELD_LENGTH] << 8) | buf[DEVICE_NAME_FIELD_LENGTH + 1];
size->height = (buf[DEVICE_NAME_FIELD_LENGTH + 2] << 8) | buf[DEVICE_NAME_FIELD_LENGTH + 3];
return SDL_TRUE;
}
#if SDL_VERSION_ATLEAST(2, 0, 5)
# define GET_DISPLAY_BOUNDS(i, r) SDL_GetDisplayUsableBounds((i), (r))
#else
# define GET_DISPLAY_BOUNDS(i, r) SDL_GetDisplayBounds((i), (r))
#endif
// init the preferred display_bounds (i.e. the screen bounds with some margins)
static SDL_bool get_preferred_display_bounds(struct size *bounds) {
SDL_Rect rect;
if (GET_DISPLAY_BOUNDS(0, &rect)) {
SDL_LogWarn(SDL_LOG_CATEGORY_SYSTEM, "Could not get display usable bounds: %s", SDL_GetError());
return SDL_FALSE;
}
bounds->width = MAX(0, rect.w - DISPLAY_MARGINS);
bounds->height = MAX(0, rect.h - DISPLAY_MARGINS);
return SDL_TRUE;
}
static inline struct size get_window_size(SDL_Window *window) {
int width;
int height;
SDL_GetWindowSize(window, &width, &height);
struct size size;
size.width = width;
size.height = height;
return size;
}
static inline struct position get_mouse_position() {
int x;
int y;
SDL_GetMouseState(&x, &y);
SDL_assert_release(x >= 0 && x < 0x10000 && y >= 0 && y < 0x10000);
return (struct position) {
.x = (Uint16) x,
.y = (Uint16) y,
};
}
// return the optimal size of the window, with the following constraints:
// - it attempts to keep at least one dimension of the current_size (i.e. it crops the black borders)
// - it keeps the aspect ratio
// - it scales down to make it fit in the display_size
// TODO unit test
static struct size get_optimal_size(struct size current_size, struct size frame_size) {
struct size display_size;
// 32 bits because we need to multiply two 16 bits values
Uint32 w;
Uint32 h;
if (!get_preferred_display_bounds(&display_size)) {
// cannot get display bounds, do not constraint the size
w = current_size.width;
h = current_size.height;
} else {
w = MIN(current_size.width, display_size.width);
h = MIN(current_size.height, display_size.height);
}
SDL_bool keep_width = frame_size.width * h > frame_size.height * w;
if (keep_width) {
// remove black borders on top and bottom
h = frame_size.height * w / frame_size.width;
} else {
// remove black borders on left and right (or none at all if it already fits)
w = frame_size.width * h / frame_size.height;
}
// w and h must fit into 16 bits
SDL_assert_release(w < 0x10000 && h < 0x10000);
return (struct size) {w, h};
}
// initially, there is no current size, so use the frame size as current size
static inline struct size get_initial_optimal_size(struct size frame_size) {
return get_optimal_size(frame_size, frame_size);
}
// same as get_optimal_size(), but read the current size from the window
static inline struct size get_optimal_window_size(SDL_Window *window, struct size frame_size) {
struct size current_size = get_window_size(window);
return get_optimal_size(current_size, frame_size);
}
static inline SDL_bool prepare_for_frame(SDL_Window *window, SDL_Renderer *renderer, SDL_Texture **texture,
struct size old_frame_size, struct size frame_size) {
(void) window; // might be used to resize the window automatically
if (old_frame_size.width != frame_size.width || old_frame_size.height != frame_size.height) {
if (SDL_RenderSetLogicalSize(renderer, frame_size.width, frame_size.height)) {
SDL_LogError(SDL_LOG_CATEGORY_RENDER, "Could not set renderer logical size: %s", SDL_GetError());
return SDL_FALSE;
}
// frame dimension changed, destroy texture
SDL_DestroyTexture(*texture);
struct size current_size = get_window_size(window);
struct size target_size = {
(Uint32) current_size.width * frame_size.width / old_frame_size.width,
(Uint32) current_size.height * frame_size.height / old_frame_size.height,
};
target_size = get_optimal_size(target_size, frame_size);
SDL_SetWindowSize(window, target_size.width, target_size.height);
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION, "New texture: %" PRIu16 "x%" PRIu16, frame_size.width, frame_size.height);
*texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_YV12, SDL_TEXTUREACCESS_STREAMING, frame_size.width, frame_size.height);
if (!*texture) {
SDL_LogCritical(SDL_LOG_CATEGORY_RENDER, "Could not create texture: %s", SDL_GetError());
return SDL_FALSE;
}
}
return SDL_TRUE;
}
static void update_texture(const AVFrame *frame, SDL_Texture *texture) {
SDL_UpdateYUVTexture(texture, NULL,
frame->data[0], frame->linesize[0],
frame->data[1], frame->linesize[1],
frame->data[2], frame->linesize[2]);
}
static void render(SDL_Renderer *renderer, SDL_Texture *texture) {
SDL_RenderClear(renderer);
if (texture) {
SDL_RenderCopy(renderer, texture, NULL, NULL);
}
SDL_RenderPresent(renderer);
}
static int wait_for_success(process_t proc, const char *name) {
if (proc == PROCESS_NONE) {
SDL_LogError(SDL_LOG_CATEGORY_SYSTEM, "Could not execute \"%s\"", name);
return -1;
}
exit_code_t exit_code;
if (!cmd_simple_wait(proc, &exit_code)) {
if (exit_code != NO_EXIT_CODE) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "\"%s\" returned with value %" PRIexitcode, name, exit_code);
} else {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "\"%s\" exited unexpectedly", name);
}
return -1;
}
return 0;
}
static SDL_bool handle_new_frame(void) {
mutex_lock(frames.mutex);
AVFrame *frame = frames.rendering_frame;
frames.rendering_frame_consumed = SDL_TRUE;
if (!decoder.skip_frames) {
cond_signal(frames.rendering_frame_consumed_cond);
}
struct size current_frame_size = {frame->width, frame->height};
if (!prepare_for_frame(window, renderer, &texture, frame_size, current_frame_size)) {
return SDL_FALSE;
}
frame_size = current_frame_size;
update_texture(frame, texture);
mutex_unlock(frames.mutex);
render(renderer, texture);
return SDL_TRUE;
}
static void handle_text_input(const SDL_TextInputEvent *event) {
struct control_event control_event;
control_event.type = CONTROL_EVENT_TYPE_TEXT;
strncpy(control_event.text_event.text, event->text, TEXT_MAX_LENGTH);
control_event.text_event.text[TEXT_MAX_LENGTH] = '\0';
if (!controller_push_event(&controller, &control_event)) {
SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION, "Cannot send text event");
}
}
static void handle_key(const SDL_KeyboardEvent *event) {
SDL_Keycode keycode = event->keysym.sym;
SDL_bool ctrl = event->keysym.mod & (KMOD_LCTRL | KMOD_RCTRL);
SDL_bool shift = event->keysym.mod & (KMOD_LSHIFT | KMOD_RSHIFT);
SDL_bool repeat = event->repeat;
// Capture Ctrl+x: optimal size
if (keycode == SDLK_x && !repeat && ctrl && !shift) {
if (event->type == SDL_KEYDOWN) {
struct size optimal_size = get_optimal_window_size(window, frame_size);
SDL_SetWindowSize(window, optimal_size.width, optimal_size.height);
}
return;
}
// Capture Ctrl+f: switch fullscreen
if (keycode == SDLK_f && !repeat && ctrl && !shift) {
if (event->type == SDL_KEYDOWN) {
Uint32 new_mode = fullscreen ? 0 : SDL_WINDOW_FULLSCREEN_DESKTOP;
if (!SDL_SetWindowFullscreen(window, new_mode)) {
fullscreen = !fullscreen;
render(renderer, texture_empty ? NULL : texture);
} else {
SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION, "Could not switch fullscreen mode: %s", SDL_GetError());
}
}
return;
}
struct control_event control_event;
if (input_key_from_sdl_to_android(event, &control_event)) {
if (!controller_push_event(&controller, &control_event)) {
SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION, "Cannot send control event");
}
}
}
static void handle_mouse_motion(const SDL_MouseMotionEvent *event, struct size screen_size) {
struct control_event control_event;
if (mouse_motion_from_sdl_to_android(event, screen_size, &control_event)) {
if (!controller_push_event(&controller, &control_event)) {
SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION, "Cannot send mouse motion event");
}
}
}
static void handle_mouse_button(const SDL_MouseButtonEvent *event, struct size screen_size) {
struct control_event control_event;
if (mouse_button_from_sdl_to_android(event, screen_size, &control_event)) {
if (!controller_push_event(&controller, &control_event)) {
SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION, "Cannot send mouse button event");
}
}
}
static void handle_mouse_wheel(const SDL_MouseWheelEvent *event, struct point point) {
struct control_event control_event;
if (mouse_wheel_from_sdl_to_android(event, point, &control_event)) {
if (!controller_push_event(&controller, &control_event)) {
SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION, "Cannot send wheel button event");
}
}
}
void event_loop(void) {
SDL_Event event;
while (SDL_WaitEvent(&event)) {
switch (event.type) {
case EVENT_DECODER_STOPPED:
SDL_LogDebug(SDL_LOG_CATEGORY_APPLICATION, "Video decoder stopped");
case SDL_QUIT:
return;
case EVENT_NEW_FRAME:
if (!handle_new_frame()) {
return;
}
texture_empty = SDL_FALSE;
count_frame(); // display fps for debug
break;
case SDL_WINDOWEVENT:
switch (event.window.event) {
case SDL_WINDOWEVENT_EXPOSED:
case SDL_WINDOWEVENT_SIZE_CHANGED:
render(renderer, texture_empty ? NULL : texture);
break;
}
break;
case SDL_TEXTINPUT: {
handle_text_input(&event.text);
break;
}
case SDL_KEYDOWN:
case SDL_KEYUP:
handle_key(&event.key);
break;
case SDL_MOUSEMOTION:
handle_mouse_motion(&event.motion, frame_size);
break;
case SDL_MOUSEWHEEL: {
struct point point = {
.screen_size = frame_size,
.position = get_mouse_position(),
};
handle_mouse_wheel(&event.wheel, point);
break;
}
case SDL_MOUSEBUTTONDOWN:
case SDL_MOUSEBUTTONUP: {
handle_mouse_button(&event.button, frame_size);
break;
}
}
}
}
SDL_bool show_screen(const char *serial, Uint16 local_port) {
SDL_bool ret = 0;
process_t push_proc = push_server(serial);
if (wait_for_success(push_proc, "adb push")) {
return SDL_FALSE;
}
process_t reverse_tunnel_proc = enable_tunnel(serial, local_port);
if (wait_for_success(reverse_tunnel_proc, "adb reverse")) {
return SDL_FALSE;
}
TCPsocket server_socket = listen_on_port(local_port);
if (!server_socket) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Could not open video socket");
goto screen_finally_adb_reverse_remove;
}
// server will connect to our socket
process_t server = start_server(serial);
if (server == PROCESS_NONE) {
ret = SDL_FALSE;
SDLNet_TCP_Close(server_socket);
goto screen_finally_adb_reverse_remove;
}
// to reduce startup time, we could be tempted to init other stuff before blocking here
// but we should not block after SDL_Init since it handles the signals (Ctrl+C) in its
// event loop: blocking could lead to deadlock
TCPsocket device_socket = blocking_accept(server_socket);
// we don't need the server socket anymore
SDLNet_TCP_Close(server_socket);
if (!device_socket) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Could not accept video socket: %s", SDL_GetError());
ret = SDL_FALSE;
stop_server(server);
goto screen_finally_adb_reverse_remove;
}
char device_name[DEVICE_NAME_FIELD_LENGTH];
// screenrecord does not send frames when the screen content does not change
// therefore, we transmit the screen size before the video stream, to be able
// to init the window immediately
if (!read_initial_device_info(device_socket, device_name, &frame_size)) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Could not retrieve initial screen size");
ret = SDL_FALSE;
SDLNet_TCP_Close(device_socket);
stop_server(server);
goto screen_finally_adb_reverse_remove;
}
if (!frames_init(&frames)) {
ret = SDL_FALSE;
SDLNet_TCP_Close(device_socket);
stop_server(server);
goto screen_finally_adb_reverse_remove;
}
decoder.frames = &frames;
decoder.video_socket = device_socket;
decoder.skip_frames = SDL_TRUE;
// now we consumed the header values, the socket receives the video stream
// start the decoder
if (!decoder_start(&decoder)) {
ret = SDL_FALSE;
SDLNet_TCP_Close(device_socket);
stop_server(server);
goto screen_finally_destroy_frames;
}
if (!controller_init(&controller, device_socket)) {
ret = SDL_FALSE;
SDLNet_TCP_Close(device_socket);
stop_server(server);
goto screen_finally_stop_decoder;
}
if (!controller_start(&controller)) {
ret = SDL_FALSE;
SDLNet_TCP_Close(device_socket);
stop_server(server);
goto screen_finally_destroy_controller;
}
if (SDL_Init(SDL_INIT_VIDEO)) {
SDL_LogCritical(SDL_LOG_CATEGORY_APPLICATION, "Could not initialize SDL: %s", SDL_GetError());
ret = SDL_FALSE;
goto screen_finally_stop_and_join_controller;
}
// FIXME it may crash in SDL_Quit in i965_dri.so
// As a workaround, do not call SDL_Quit() (we are exiting anyway).
// atexit(SDL_Quit);
// Bilinear resizing
if (!SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "1")) {
SDL_LogWarn(SDL_LOG_CATEGORY_VIDEO, "Could not enable bilinear filtering");
}
struct size window_size = get_initial_optimal_size(frame_size);
window = SDL_CreateWindow(device_name, SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
window_size.width, window_size.height, SDL_WINDOW_SHOWN | SDL_WINDOW_RESIZABLE);
if (!window) {
SDL_LogCritical(SDL_LOG_CATEGORY_SYSTEM, "Could not create window: %s", SDL_GetError());
ret = SDL_FALSE;
goto screen_finally_stop_decoder;
}
renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
if (!renderer) {
SDL_LogCritical(SDL_LOG_CATEGORY_RENDER, "Could not create renderer: %s", SDL_GetError());
ret = SDL_FALSE;
goto screen_finally_destroy_window;
}
if (SDL_RenderSetLogicalSize(renderer, frame_size.width, frame_size.height)) {
SDL_LogError(SDL_LOG_CATEGORY_RENDER, "Could not set renderer logical size: %s", SDL_GetError());
ret = SDL_FALSE;
goto screen_finally_destroy_renderer;
}
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION, "Initial texture: %" PRIu16 "x%" PRIu16, frame_size.width, frame_size.height);
texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_YV12, SDL_TEXTUREACCESS_STREAMING, frame_size.width, frame_size.height);
if (!texture) {
SDL_LogCritical(SDL_LOG_CATEGORY_RENDER, "Could not create texture: %s", SDL_GetError());
ret = SDL_FALSE;
goto screen_finally_destroy_renderer;
}
SDL_RenderClear(renderer);
SDL_RenderPresent(renderer);
event_loop();
SDL_LogDebug(SDL_LOG_CATEGORY_APPLICATION, "quit...");
SDL_DestroyTexture(texture);
screen_finally_destroy_renderer:
// FIXME it may crash at exit if we destroy the renderer or the window,
// with the exact same stack trace as <https://bugs.launchpad.net/mir/+bug/1466535>.
// As a workaround, leak the renderer and the window (we are exiting anyway).
//SDL_DestroyRenderer(renderer);
screen_finally_destroy_window:
//SDL_DestroyWindow(window);
screen_finally_stop_and_join_controller:
controller_stop(&controller);
controller_join(&controller);
screen_finally_destroy_controller:
controller_destroy(&controller);
screen_finally_stop_decoder:
SDLNet_TCP_Close(device_socket);
// kill the server before decoder_join() to wake up the decoder
stop_server(server);
decoder_join(&decoder);
screen_finally_destroy_frames:
frames_destroy(&frames);
screen_finally_adb_reverse_remove:
{
process_t remove = disable_tunnel(serial);
if (remove != PROCESS_NONE) {
// ignore failure
cmd_simple_wait(remove, NULL);
}
}
return ret;
}