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camera: Made a pass over all the sources, cleaning up for SDL3 style, etc.

main
Ryan C. Gordon 2023-11-28 23:03:19 -05:00
parent 7ae955ce68
commit 2ad44bd162
6 changed files with 539 additions and 763 deletions
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325
src/camera/SDL_camera.c
View File

@ -20,8 +20,6 @@
*/
#include "SDL_internal.h"
#include "SDL3/SDL.h"
#include "SDL3/SDL_camera.h"
#include "SDL_syscamera.h"
#include "SDL_camera_c.h"
#include "../video/SDL_pixels_c.h"
@ -29,16 +27,16 @@
#define DEBUG_CAMERA 1
/* list node entries to share frames between SDL and user app */
// list node entries to share frames between SDL and user app
// !!! FIXME: do we need this struct?
typedef struct entry_t
{
SDL_CameraFrame frame;
} entry_t;
static SDL_CameraDevice *open_devices[16];
static SDL_CameraDevice *open_devices[16]; // !!! FIXME: remove limit
static void
close_device(SDL_CameraDevice *device)
static void CloseCameraDevice(SDL_CameraDevice *device)
{
if (!device) {
return;
@ -57,29 +55,25 @@ close_device(SDL_CameraDevice *device)
SDL_DestroyMutex(device->acquiring_lock);
}
{
int i, n = SDL_arraysize(open_devices);
for (i = 0; i < n; i++) {
const int n = SDL_arraysize(open_devices);
for (int i = 0; i < n; i++) {
if (open_devices[i] == device) {
open_devices[i] = NULL;
}
}
}
{
entry_t *entry = NULL;
while (device->buffer_queue != NULL) {
SDL_ListPop(&device->buffer_queue, (void**)&entry);
if (entry) {
SDL_CameraFrame f = entry->frame;
/* Release frames not acquired, if any */
// Release frames not acquired, if any
if (f.timestampNS) {
ReleaseFrame(device, &f);
}
SDL_free(entry);
}
}
}
CloseDevice(device);
@ -87,12 +81,12 @@ close_device(SDL_CameraDevice *device)
SDL_free(device);
}
/* Tell if all device are closed */
SDL_bool check_all_device_closed(void)
// Tell if all devices are closed
SDL_bool CheckAllDeviceClosed(void)
{
int i, n = SDL_arraysize(open_devices);
const int n = SDL_arraysize(open_devices);
int all_closed = SDL_TRUE;
for (i = 0; i < n; i++) {
for (int i = 0; i < n; i++) {
if (open_devices[i]) {
all_closed = SDL_FALSE;
break;
@ -101,11 +95,11 @@ SDL_bool check_all_device_closed(void)
return all_closed;
}
/* Tell if at least one device is in playing state */
SDL_bool check_device_playing(void)
// Tell if at least one device is in playing state
SDL_bool CheckDevicePlaying(void)
{
int i, n = SDL_arraysize(open_devices);
for (i = 0; i < n; i++) {
const int n = SDL_arraysize(open_devices);
for (int i = 0; i < n; i++) {
if (open_devices[i]) {
if (SDL_GetCameraStatus(open_devices[i]) == SDL_CAMERA_PLAYING) {
return SDL_TRUE;
@ -115,35 +109,26 @@ SDL_bool check_device_playing(void)
return SDL_FALSE;
}
void
SDL_CloseCamera(SDL_CameraDevice *device)
void SDL_CloseCamera(SDL_CameraDevice *device)
{
if (!device) {
SDL_InvalidParamError("device");
return;
} else {
CloseCameraDevice(device);
}
close_device(device);
}
int
SDL_StartCamera(SDL_CameraDevice *device)
int SDL_StartCamera(SDL_CameraDevice *device)
{
SDL_CameraStatus status;
int result;
if (!device) {
return SDL_InvalidParamError("device");
}
if (device->is_spec_set == SDL_FALSE) {
} else if (device->is_spec_set == SDL_FALSE) {
return SDL_SetError("no spec set");
}
status = SDL_GetCameraStatus(device);
if (status != SDL_CAMERA_INIT) {
} else if (SDL_GetCameraStatus(device) != SDL_CAMERA_INIT) {
return SDL_SetError("invalid state");
}
result = StartCamera(device);
const int result = StartCamera(device);
if (result < 0) {
return result;
}
@ -153,34 +138,23 @@ SDL_StartCamera(SDL_CameraDevice *device)
return 0;
}
int
SDL_GetCameraSpec(SDL_CameraDevice *device, SDL_CameraSpec *spec)
int SDL_GetCameraSpec(SDL_CameraDevice *device, SDL_CameraSpec *spec)
{
if (!device) {
return SDL_InvalidParamError("device");
}
if (!spec) {
} else if (!spec) {
return SDL_InvalidParamError("spec");
}
SDL_zerop(spec);
return GetDeviceSpec(device, spec);
}
int
SDL_StopCamera(SDL_CameraDevice *device)
int SDL_StopCamera(SDL_CameraDevice *device)
{
SDL_CameraStatus status;
int ret;
if (!device) {
return SDL_InvalidParamError("device");
}
status = SDL_GetCameraStatus(device);
if (status != SDL_CAMERA_PLAYING) {
} else if (SDL_GetCameraStatus(device) != SDL_CAMERA_PLAYING) {
return SDL_SetError("invalid state");
}
@ -188,30 +162,24 @@ SDL_StopCamera(SDL_CameraDevice *device)
SDL_AtomicSet(&device->shutdown, 1);
SDL_LockMutex(device->acquiring_lock);
ret = StopCamera(device);
const int retval = StopCamera(device);
SDL_UnlockMutex(device->acquiring_lock);
if (ret < 0) {
return -1;
return (retval < 0) ? -1 : 0;
}
return 0;
}
/* Check spec has valid format and frame size */
static int
prepare_cameraspec(SDL_CameraDevice *device, const SDL_CameraSpec *desired, SDL_CameraSpec *obtained, int allowed_changes)
// Check spec has valid format and frame size
static int prepare_cameraspec(SDL_CameraDevice *device, const SDL_CameraSpec *desired, SDL_CameraSpec *obtained, int allowed_changes)
{
/* Check format */
{
int i, num = SDL_GetNumCameraFormats(device);
int is_format_valid = 0;
// Check format
const int numfmts = SDL_GetNumCameraFormats(device);
SDL_bool is_format_valid = SDL_FALSE;
for (i = 0; i < num; i++) {
for (int i = 0; i < numfmts; i++) {
Uint32 format;
if (SDL_GetCameraFormat(device, i, &format) == 0) {
if (format == desired->format && format != SDL_PIXELFORMAT_UNKNOWN) {
is_format_valid = 1;
is_format_valid = SDL_TRUE;
obtained->format = format;
break;
}
@ -220,39 +188,34 @@ prepare_cameraspec(SDL_CameraDevice *device, const SDL_CameraSpec *desired, SDL_
if (!is_format_valid) {
if (allowed_changes) {
for (i = 0; i < num; i++) {
for (int i = 0; i < numfmts; i++) {
Uint32 format;
if (SDL_GetCameraFormat(device, i, &format) == 0) {
if (format != SDL_PIXELFORMAT_UNKNOWN) {
obtained->format = format;
is_format_valid = 1;
is_format_valid = SDL_TRUE;
break;
}
}
}
} else {
SDL_SetError("Not allowed to change the format");
return -1;
return SDL_SetError("Not allowed to change the format");
}
}
if (!is_format_valid) {
SDL_SetError("Invalid format");
return -1;
}
return SDL_SetError("Invalid format");
}
/* Check frame size */
{
int i, num = SDL_GetNumCameraFrameSizes(device, obtained->format);
int is_framesize_valid = 0;
// Check frame size
const int numsizes = SDL_GetNumCameraFrameSizes(device, obtained->format);
SDL_bool is_framesize_valid = SDL_FALSE;
for (i = 0; i < num; i++) {
for (int i = 0; i < numsizes; i++) {
int w, h;
if (SDL_GetCameraFrameSize(device, obtained->format, i, &w, &h) == 0) {
if (desired->width == w && desired->height == h) {
is_framesize_valid = 1;
is_framesize_valid = SDL_TRUE;
obtained->width = w;
obtained->height = h;
break;
@ -264,28 +227,23 @@ prepare_cameraspec(SDL_CameraDevice *device, const SDL_CameraSpec *desired, SDL_
if (allowed_changes) {
int w, h;
if (SDL_GetCameraFrameSize(device, obtained->format, 0, &w, &h) == 0) {
is_framesize_valid = 1;
is_framesize_valid = SDL_TRUE;
obtained->width = w;
obtained->height = h;
}
} else {
SDL_SetError("Not allowed to change the frame size");
return -1;
return SDL_SetError("Not allowed to change the frame size");
}
}
if (!is_framesize_valid) {
SDL_SetError("Invalid frame size");
return -1;
}
return SDL_SetError("Invalid frame size");
}
return 0;
}
const char *
SDL_GetCameraDeviceName(SDL_CameraDeviceID instance_id)
const char *SDL_GetCameraDeviceName(SDL_CameraDeviceID instance_id)
{
static char buf[256];
buf[0] = 0;
@ -299,47 +257,41 @@ SDL_GetCameraDeviceName(SDL_CameraDeviceID instance_id)
if (GetCameraDeviceName(instance_id, buf, sizeof (buf)) < 0) {
buf[0] = 0;
}
return buf;
}
SDL_CameraDeviceID *
SDL_GetCameraDevices(int *count)
SDL_CameraDeviceID *SDL_GetCameraDevices(int *count)
{
int dummycount = 0;
if (!count) {
count = &dummycount;
}
int num = 0;
SDL_CameraDeviceID *ret = GetCameraDevices(&num);
if (ret) {
if (count) {
SDL_CameraDeviceID *retval = GetCameraDevices(&num);
if (retval) {
*count = num;
}
return ret;
return retval;
}
/* return list of 0 ID, null terminated */
num = 0;
ret = (SDL_CameraDeviceID *)SDL_malloc((num + 1) * sizeof(*ret));
if (ret == NULL) {
// return list of 0 ID, null terminated
retval = (SDL_CameraDeviceID *)SDL_calloc(1, sizeof(*retval));
if (retval == NULL) {
SDL_OutOfMemory();
if (count) {
*count = 0;
}
return NULL;
}
ret[num] = 0;
if (count) {
*count = num;
retval[0] = 0;
*count = 0;
return retval;
}
return ret;
}
/* Camera thread function */
static int SDLCALL
SDL_CameraThread(void *devicep)
// Camera thread function
static int SDLCALL SDL_CameraThread(void *devicep)
{
const int delay = 20;
SDL_CameraDevice *device = (SDL_CameraDevice *) devicep;
@ -358,23 +310,23 @@ SDL_CameraThread(void *devicep)
Android_JNI_CameraSetThreadPriority(device->iscapture, device);
}*/
#else
/* The camera capture is always a high priority thread */
// The camera capture is always a high priority thread
SDL_SetThreadPriority(SDL_THREAD_PRIORITY_HIGH);
#endif
/* Perform any thread setup */
// Perform any thread setup
device->threadid = SDL_GetCurrentThreadID();
/* Init state */
// Init state
// !!! FIXME: use a semaphore or something
while (!SDL_AtomicGet(&device->enabled)) {
SDL_Delay(delay);
}
/* Loop, filling the camera buffers */
// Loop, filling the camera buffers
while (!SDL_AtomicGet(&device->shutdown)) {
SDL_CameraFrame f;
int ret;
entry_t *entry;
SDL_zero(f);
@ -389,7 +341,7 @@ SDL_CameraThread(void *devicep)
}
if (ret < 0) {
/* Flag it as an error */
// Flag it as an error
#if DEBUG_CAMERA
SDL_Log("dev[%p] error AcquireFrame: %d %s", (void *)device, ret, SDL_GetError());
#endif
@ -397,7 +349,7 @@ SDL_CameraThread(void *devicep)
}
entry = SDL_malloc(sizeof (entry_t));
entry_t *entry = SDL_malloc(sizeof (entry_t));
if (entry == NULL) {
goto error_mem;
}
@ -424,26 +376,25 @@ error_mem:
SDL_Log("dev[%p] End thread 'SDL_CameraThread' with error: %s", (void *)device, SDL_GetError());
#endif
SDL_AtomicSet(&device->shutdown, 1);
SDL_OutOfMemory();
SDL_OutOfMemory(); // !!! FIXME: this error isn't accessible since the thread is about to terminate
return 0;
}
SDL_CameraDevice *
SDL_OpenCamera(SDL_CameraDeviceID instance_id)
SDL_CameraDevice *SDL_OpenCamera(SDL_CameraDeviceID instance_id)
{
int i, n = SDL_arraysize(open_devices);
int id = -1;
const int n = SDL_arraysize(open_devices);
SDL_CameraDevice *device = NULL;
const char *device_name = NULL;
int id = -1;
if (!SDL_WasInit(SDL_INIT_VIDEO)) {
SDL_SetError("Video subsystem is not initialized");
goto error;
}
/* !!! FIXME: there is a race condition here if two devices open from two threads at once. */
/* Find an available device ID... */
for (i = 0; i < n; i++) {
// !!! FIXME: there is a race condition here if two devices open from two threads at once.
// Find an available device ID...
for (int i = 0; i < n; i++) {
if (open_devices[i] == NULL) {
id = i;
break;
@ -470,7 +421,7 @@ SDL_OpenCamera(SDL_CameraDeviceID instance_id)
#if 0
// FIXME do we need this ?
/* Let the user override. */
// Let the user override.
{
const char *dev = SDL_getenv("SDL_CAMERA_DEVICE_NAME");
if (dev && dev[0]) {
@ -490,7 +441,6 @@ SDL_OpenCamera(SDL_CameraDeviceID instance_id)
}
device->dev_name = SDL_strdup(device_name);
SDL_AtomicSet(&device->shutdown, 0);
SDL_AtomicSet(&device->enabled, 0);
@ -510,37 +460,28 @@ SDL_OpenCamera(SDL_CameraDeviceID instance_id)
goto error;
}
/* empty */
// empty
device->buffer_queue = NULL;
open_devices[id] = device; /* add it to our list of open devices. */
open_devices[id] = device; // add it to our list of open devices.
/* Start the camera thread */
{
const size_t stacksize = 64 * 1024;
// Start the camera thread
char threadname[64];
SDL_snprintf(threadname, sizeof (threadname), "SDLCamera%d", id);
device->thread = SDL_CreateThreadInternal(SDL_CameraThread, threadname, stacksize, device);
device->thread = SDL_CreateThreadInternal(SDL_CameraThread, threadname, 0, device);
if (device->thread == NULL) {
SDL_SetError("Couldn't create camera thread");
goto error;
}
}
return device;
error:
close_device(device);
CloseCameraDevice(device);
return NULL;
}
int
SDL_SetCameraSpec(SDL_CameraDevice *device,
const SDL_CameraSpec *desired,
SDL_CameraSpec *obtained,
int allowed_changes)
int SDL_SetCameraSpec(SDL_CameraDevice *device, const SDL_CameraSpec *desired, SDL_CameraSpec *obtained, int allowed_changes)
{
SDL_CameraSpec _obtained;
SDL_CameraSpec _desired;
@ -548,9 +489,7 @@ SDL_SetCameraSpec(SDL_CameraDevice *device,
if (!device) {
return SDL_InvalidParamError("device");
}
if (device->is_spec_set == SDL_TRUE) {
} else if (device->is_spec_set == SDL_TRUE) {
return SDL_SetError("already configured");
}
@ -559,7 +498,7 @@ SDL_SetCameraSpec(SDL_CameraDevice *device,
desired = &_desired;
allowed_changes = SDL_CAMERA_ALLOW_ANY_CHANGE;
} else {
/* in case desired == obtained */
// in case desired == obtained
_desired = *desired;
desired = &_desired;
}
@ -588,14 +527,11 @@ SDL_SetCameraSpec(SDL_CameraDevice *device,
return 0;
}
int
SDL_AcquireCameraFrame(SDL_CameraDevice *device, SDL_CameraFrame *frame)
int SDL_AcquireCameraFrame(SDL_CameraDevice *device, SDL_CameraFrame *frame)
{
if (!device) {
return SDL_InvalidParamError("device");
}
if (!frame) {
} else if (!frame) {
return SDL_InvalidParamError("frame");
}
@ -604,7 +540,7 @@ SDL_AcquireCameraFrame(SDL_CameraDevice *device, SDL_CameraFrame *frame)
if (device->thread == NULL) {
int ret;
/* Wait for a frame */
// Wait for a frame
while ((ret = AcquireFrame(device, frame)) == 0) {
if (frame->num_planes) {
return 0;
@ -622,42 +558,33 @@ SDL_AcquireCameraFrame(SDL_CameraDevice *device, SDL_CameraFrame *frame)
*frame = entry->frame;
SDL_free(entry);
/* Error from thread */
// Error from thread
if (frame->num_planes == 0 && frame->timestampNS == 0) {
return SDL_SetError("error from acquisition thread");
}
} else {
/* Queue is empty. Not an error. */
// Queue is empty. Not an error.
}
}
return 0;
}
int
SDL_ReleaseCameraFrame(SDL_CameraDevice *device, SDL_CameraFrame *frame)
int SDL_ReleaseCameraFrame(SDL_CameraDevice *device, SDL_CameraFrame *frame)
{
if (!device) {
return SDL_InvalidParamError("device");
}
if (frame == NULL) {
} else if (frame == NULL) {
return SDL_InvalidParamError("frame");
}
if (ReleaseFrame(device, frame) < 0) {
} else if (ReleaseFrame(device, frame) < 0) {
return -1;
}
SDL_zerop(frame);
return 0;
}
int
SDL_GetNumCameraFormats(SDL_CameraDevice *device)
int SDL_GetNumCameraFormats(SDL_CameraDevice *device)
{
if (!device) {
return SDL_InvalidParamError("device");
@ -665,21 +592,18 @@ SDL_GetNumCameraFormats(SDL_CameraDevice *device)
return GetNumFormats(device);
}
int
SDL_GetCameraFormat(SDL_CameraDevice *device, int index, Uint32 *format)
int SDL_GetCameraFormat(SDL_CameraDevice *device, int index, Uint32 *format)
{
if (!device) {
return SDL_InvalidParamError("device");
}
if (!format) {
} else if (!format) {
return SDL_InvalidParamError("format");
}
*format = 0;
return GetFormat(device, index, format);
}
int
SDL_GetNumCameraFrameSizes(SDL_CameraDevice *device, Uint32 format)
int SDL_GetNumCameraFrameSizes(SDL_CameraDevice *device, Uint32 format)
{
if (!device) {
return SDL_InvalidParamError("device");
@ -687,29 +611,20 @@ SDL_GetNumCameraFrameSizes(SDL_CameraDevice *device, Uint32 format)
return GetNumFrameSizes(device, format);
}
int
SDL_GetCameraFrameSize(SDL_CameraDevice *device, Uint32 format, int index, int *width, int *height)
int SDL_GetCameraFrameSize(SDL_CameraDevice *device, Uint32 format, int index, int *width, int *height)
{
if (!device) {
return SDL_InvalidParamError("device");
}
if (!width) {
} else if (!width) {
return SDL_InvalidParamError("width");
}
if (!height) {
} else if (!height) {
return SDL_InvalidParamError("height");
}
*width = 0;
*height = 0;
*width = *height = 0;
return GetFrameSize(device, format, index, width, height);
}
SDL_CameraDevice *
SDL_OpenCameraWithSpec(
SDL_CameraDeviceID instance_id,
const SDL_CameraSpec *desired,
SDL_CameraSpec *obtained,
int allowed_changes)
SDL_CameraDevice *SDL_OpenCameraWithSpec(SDL_CameraDeviceID instance_id, const SDL_CameraSpec *desired, SDL_CameraSpec *obtained, int allowed_changes)
{
SDL_CameraDevice *device;
@ -724,42 +639,32 @@ SDL_OpenCameraWithSpec(
return device;
}
SDL_CameraStatus
SDL_GetCameraStatus(SDL_CameraDevice *device)
SDL_CameraStatus SDL_GetCameraStatus(SDL_CameraDevice *device)
{
if (device == NULL) {
return SDL_CAMERA_INIT;
}
if (device->is_spec_set == SDL_FALSE) {
} else if (device->is_spec_set == SDL_FALSE) {
return SDL_CAMERA_INIT;
}
if (SDL_AtomicGet(&device->shutdown)) {
} else if (SDL_AtomicGet(&device->shutdown)) {
return SDL_CAMERA_STOPPED;
}
if (SDL_AtomicGet(&device->enabled)) {
} else if (SDL_AtomicGet(&device->enabled)) {
return SDL_CAMERA_PLAYING;
}
return SDL_CAMERA_INIT;
}
int
SDL_CameraInit(void)
int SDL_CameraInit(void)
{
SDL_zeroa(open_devices);
SDL_SYS_CameraInit();
return 0;
}
void
SDL_QuitCamera(void)
void SDL_QuitCamera(void)
{
int i, n = SDL_arraysize(open_devices);
for (i = 0; i < n; i++) {
close_device(open_devices[i]);
const int n = SDL_arraysize(open_devices);
for (int i = 0; i < n; i++) {
CloseCameraDevice(open_devices[i]);
}
SDL_zeroa(open_devices);

6
src/camera/SDL_camera_c.h
View File

@ -23,10 +23,10 @@
#ifndef SDL_camera_c_h_
#define SDL_camera_c_h_
/* Initialize the camera subsystem */
// Initialize the camera subsystem
int SDL_CameraInit(void);
/* Shutdown the camera subsystem */
// Shutdown the camera subsystem
void SDL_QuitCamera(void);
#endif /* SDL_camera_c_h_ */
#endif // SDL_camera_c_h_

30
src/camera/SDL_syscamera.h
View File

@ -25,45 +25,43 @@
#include "../SDL_list.h"
/* The SDL camera driver */
// The SDL camera driver
typedef struct SDL_CameraDevice SDL_CameraDevice;
/* Define the SDL camera driver structure */
// Define the SDL camera driver structure
struct SDL_CameraDevice
{
/* * * */
/* Data common to all devices */
/* The device's current camera specification */
// The device's current camera specification
SDL_CameraSpec spec;
/* Device name */
// Device name
char *dev_name;
/* Current state flags */
// Current state flags
SDL_AtomicInt shutdown;
SDL_AtomicInt enabled;
SDL_bool is_spec_set;
/* A mutex for locking the queue buffers */
// A mutex for locking the queue buffers
SDL_Mutex *device_lock;
SDL_Mutex *acquiring_lock;
/* A thread to feed the camera device */
// A thread to feed the camera device
SDL_Thread *thread;
SDL_ThreadID threadid;
/* Queued buffers (if app not using callback). */
// Queued buffers (if app not using callback).
SDL_ListNode *buffer_queue;
/* * * */
/* Data private to this driver */
// Data private to this driver
struct SDL_PrivateCameraData *hidden;
};
extern int SDL_SYS_CameraInit(void);
extern int SDL_SYS_CameraQuit(void);
// !!! FIXME: These names need to be made camera-specific.
extern int OpenDevice(SDL_CameraDevice *_this);
extern void CloseDevice(SDL_CameraDevice *_this);
@ -86,7 +84,7 @@ extern int GetFrameSize(SDL_CameraDevice *_this, Uint32 format, int index, int *
extern int GetCameraDeviceName(SDL_CameraDeviceID instance_id, char *buf, int size);
extern SDL_CameraDeviceID *GetCameraDevices(int *count);
extern SDL_bool check_all_device_closed(void);
extern SDL_bool check_device_playing(void);
extern SDL_bool CheckAllDeviceClosed(void);
extern SDL_bool CheckDevicePlaying(void);
#endif /* SDL_syscamera_h_ */
#endif // SDL_syscamera_h_

226
src/camera/android/SDL_camera_android.c
View File

@ -62,8 +62,7 @@
static ACameraManager *cameraMgr = NULL;
static ACameraIdList *cameraIdList = NULL;
static void
create_cameraMgr(void)
static void create_cameraMgr(void)
{
if (cameraMgr == NULL) {
#if 0 // !!! FIXME: this is getting replaced in a different branch.
@ -81,8 +80,7 @@ create_cameraMgr(void)
}
}
static void
delete_cameraMgr(void)
static void delete_cameraMgr(void)
{
if (cameraIdList) {
ACameraManager_deleteCameraIdList(cameraIdList);
@ -104,15 +102,13 @@ struct SDL_PrivateCameraData
ACaptureSessionOutputContainer *sessionOutputContainer;
AImageReader *reader;
int num_formats;
int count_formats[6]; // see format_2_id
int count_formats[6]; // see format_to_id
};
/**/
#define FORMAT_SDL SDL_PIXELFORMAT_NV12
static int
format_2_id(int fmt) {
static int format_to_id(int fmt) {
switch (fmt) {
#define CASE(x, y) case x: return y
CASE(FORMAT_SDL, 0);
@ -127,8 +123,7 @@ format_2_id(int fmt) {
}
}
static int
id_2_format(int fmt) {
static int id_to_format(int fmt) {
switch (fmt) {
#define CASE(x, y) case y: return x
CASE(FORMAT_SDL, 0);
@ -143,8 +138,7 @@ id_2_format(int fmt) {
}
}
static Uint32
format_android_2_sdl(Uint32 fmt)
static Uint32 format_android_to_sdl(Uint32 fmt)
{
switch (fmt) {
#define CASE(x, y) case x: return y
@ -164,8 +158,7 @@ format_android_2_sdl(Uint32 fmt)
}
}
static Uint32
format_sdl_2_android(Uint32 fmt)
static Uint32 format_sdl_to_android(Uint32 fmt)
{
switch (fmt) {
#define CASE(x, y) case y: return x
@ -181,47 +174,49 @@ format_sdl_2_android(Uint32 fmt)
}
static void
onDisconnected(void *context, ACameraDevice *device)
static void onDisconnected(void *context, ACameraDevice *device)
{
// SDL_CameraDevice *_this = (SDL_CameraDevice *) context;
#if DEBUG_CAMERA
SDL_Log("CB onDisconnected");
#endif
}
static void
onError(void *context, ACameraDevice *device, int error)
static void onError(void *context, ACameraDevice *device, int error)
{
// SDL_CameraDevice *_this = (SDL_CameraDevice *) context;
#if DEBUG_CAMERA
SDL_Log("CB onError");
#endif
}
static void
onClosed(void* context, ACameraCaptureSession *session)
static void onClosed(void* context, ACameraCaptureSession *session)
{
// SDL_CameraDevice *_this = (SDL_CameraDevice *) context;
#if DEBUG_CAMERA
SDL_Log("CB onClosed");
#endif
}
static void
onReady(void* context, ACameraCaptureSession *session)
static void onReady(void* context, ACameraCaptureSession *session)
{
// SDL_CameraDevice *_this = (SDL_CameraDevice *) context;
#if DEBUG_CAMERA
SDL_Log("CB onReady");
#endif
}
static void
onActive(void* context, ACameraCaptureSession *session)
static void onActive(void* context, ACameraCaptureSession *session)
{
// SDL_CameraDevice *_this = (SDL_CameraDevice *) context;
#if DEBUG_CAMERA
SDL_Log("CB onActive");
#endif
}
int
OpenDevice(SDL_CameraDevice *_this)
int OpenDevice(SDL_CameraDevice *_this)
{
camera_status_t res;
/* Cannot open a second camera, while the first one is opened.
* If you want to play several camera, they must all be opened first, then played.
*
@ -230,7 +225,7 @@ OpenDevice(SDL_CameraDevice *_this)
* before configuring sessions on any of the camera devices. * "
*
*/
if (check_device_playing()) {
if (CheckDevicePlaying()) {
return SDL_SetError("A camera is already playing");
}
@ -245,7 +240,7 @@ OpenDevice(SDL_CameraDevice *_this)
_this->hidden->dev_callbacks.onDisconnected = onDisconnected;
_this->hidden->dev_callbacks.onError = onError;
res = ACameraManager_openCamera(cameraMgr, _this->dev_name, &_this->hidden->dev_callbacks, &_this->hidden->device);
camera_status_t res = ACameraManager_openCamera(cameraMgr, _this->dev_name, &_this->hidden->dev_callbacks, &_this->hidden->device);
if (res != ACAMERA_OK) {
return SDL_SetError("Failed to open camera");
}
@ -253,8 +248,7 @@ OpenDevice(SDL_CameraDevice *_this)
return 0;
}
void
CloseDevice(SDL_CameraDevice *_this)
void CloseDevice(SDL_CameraDevice *_this)
{
if (_this && _this->hidden) {
if (_this->hidden->session) {
@ -278,13 +272,13 @@ CloseDevice(SDL_CameraDevice *_this)
_this->hidden = NULL;
}
if (check_all_device_closed()) {
// !!! FIXME: just refcount this?
if (CheckAllDeviceClosed()) {
delete_cameraMgr();
}
}
int
InitDevice(SDL_CameraDevice *_this)
int InitDevice(SDL_CameraDevice *_this)
{
size_t size, pitch;
SDL_CalculateSize(_this->spec.format, _this->spec.width, _this->spec.height, &size, &pitch, SDL_FALSE);
@ -292,19 +286,19 @@ InitDevice(SDL_CameraDevice *_this)
return 0;
}
int
GetDeviceSpec(SDL_CameraDevice *_this, SDL_CameraSpec *spec)
int GetDeviceSpec(SDL_CameraDevice *_this, SDL_CameraSpec *spec)
{
// !!! FIXME: catch NULLs at higher level
if (spec) {
*spec = _this->spec;
SDL_copyp(spec, &_this->spec);
return 0;
}
return -1;
}
int
StartCamera(SDL_CameraDevice *_this)
int StartCamera(SDL_CameraDevice *_this)
{
// !!! FIXME: maybe log the error code in SDL_SetError
camera_status_t res;
media_status_t res2;
ANativeWindow *window = NULL;
@ -312,7 +306,7 @@ StartCamera(SDL_CameraDevice *_this)
ACameraOutputTarget *outputTarget;
ACaptureRequest *request;
res2 = AImageReader_new(_this->spec.width, _this->spec.height, format_sdl_2_android(_this->spec.format), 10 /* nb buffers */, &_this->hidden->reader);
res2 = AImageReader_new(_this->spec.width, _this->spec.height, format_sdl_to_android(_this->spec.format), 10 /* nb buffers */, &_this->hidden->reader);
if (res2 != AMEDIA_OK) {
SDL_SetError("Error AImageReader_new");
goto error;
@ -321,10 +315,8 @@ StartCamera(SDL_CameraDevice *_this)
if (res2 != AMEDIA_OK) {
SDL_SetError("Error AImageReader_new");
goto error;
}
res = ACaptureSessionOutput_create(window, &sessionOutput);
if (res != ACAMERA_OK) {
SDL_SetError("Error ACaptureSessionOutput_create");
@ -341,14 +333,12 @@ StartCamera(SDL_CameraDevice *_this)
goto error;
}
res = ACameraOutputTarget_create(window, &outputTarget);
if (res != ACAMERA_OK) {
SDL_SetError("Error ACameraOutputTarget_create");
goto error;
}
res = ACameraDevice_createCaptureRequest(_this->hidden->device, TEMPLATE_RECORD, &request);
if (res != ACAMERA_OK) {
SDL_SetError("Error ACameraDevice_createCaptureRequest");
@ -361,7 +351,6 @@ StartCamera(SDL_CameraDevice *_this)
goto error;
}
_this->hidden->capture_callbacks.context = (void *) _this;
_this->hidden->capture_callbacks.onClosed = onClosed;
_this->hidden->capture_callbacks.onReady = onReady;
@ -388,16 +377,14 @@ error:
return -1;
}
int
StopCamera(SDL_CameraDevice *_this)
int StopCamera(SDL_CameraDevice *_this)
{
ACameraCaptureSession_close(_this->hidden->session);
_this->hidden->session = NULL;
return 0;
}
int
AcquireFrame(SDL_CameraDevice *_this, SDL_CameraFrame *frame)
int AcquireFrame(SDL_CameraDevice *_this, SDL_CameraFrame *frame)
{
media_status_t res;
AImage *image;
@ -406,20 +393,17 @@ AcquireFrame(SDL_CameraDevice *_this, SDL_CameraFrame *frame)
res = AImageReader_acquireLatestImage(_this->hidden->reader, &image);
*/
if (res == AMEDIA_IMGREADER_NO_BUFFER_AVAILABLE ) {
SDL_Delay(20); // TODO fix some delay
#if DEBUG_CAMERA
//SDL_Log("AImageReader_acquireNextImage: AMEDIA_IMGREADER_NO_BUFFER_AVAILABLE");
#endif
return 0;
} else if (res == AMEDIA_OK ) {
int i = 0;
int32_t numPlanes = 0;
AImage_getNumberOfPlanes(image, &numPlanes);
frame->timestampNS = SDL_GetTicksNS();
for (i = 0; i < numPlanes && i < 3; i++) {
for (int i = 0; i < numPlanes && i < 3; i++) {
int dataLength = 0;
int rowStride = 0;
uint8_t *data = NULL;
@ -442,18 +426,16 @@ AcquireFrame(SDL_CameraDevice *_this, SDL_CameraFrame *frame)
}
frame->internal = (void*)image;
return 0;
} else if (res == AMEDIA_IMGREADER_MAX_IMAGES_ACQUIRED) {
SDL_SetError("AMEDIA_IMGREADER_MAX_IMAGES_ACQUIRED");
return SDL_SetError("AMEDIA_IMGREADER_MAX_IMAGES_ACQUIRED");
} else {
SDL_SetError("AImageReader_acquireNextImage: %d", res);
return SDL_SetError("AImageReader_acquireNextImage: %d", res);
}
return -1;
return 0;
}
int
ReleaseFrame(SDL_CameraDevice *_this, SDL_CameraFrame *frame)
int ReleaseFrame(SDL_CameraDevice *_this, SDL_CameraFrame *frame)
{
if (frame->internal){
AImage_delete((AImage *)frame->internal);
@ -461,12 +443,10 @@ ReleaseFrame(SDL_CameraDevice *_this, SDL_CameraFrame *frame)
return 0;
}
int
GetNumFormats(SDL_CameraDevice *_this)
int GetNumFormats(SDL_CameraDevice *_this)
{
camera_status_t res;
int i;
int unknown = 0;
SDL_bool unknown = SDL_FALSE;
ACameraMetadata *metadata;
ACameraMetadata_const_entry entry;
@ -486,17 +466,16 @@ GetNumFormats(SDL_CameraDevice *_this)
SDL_Log("got entry ACAMERA_SCALER_AVAILABLE_STREAM_CONFIGURATIONS");
for (i = 0; i < entry.count; i += 4) {
int32_t format = entry.data.i32[i + 0];
int32_t type = entry.data.i32[i + 3];
Uint32 fmt;
for (int i = 0; i < entry.count; i += 4) {
const int32_t format = entry.data.i32[i + 0];
const int32_t type = entry.data.i32[i + 3];
if (type == ACAMERA_SCALER_AVAILABLE_STREAM_CONFIGURATIONS_INPUT) {
continue;
}
fmt = format_android_2_sdl(format);
_this->hidden->count_formats[format_2_id(fmt)] += 1;
const Uint32 fmt = format_android_to_sdl(format);
_this->hidden->count_formats[format_to_id(fmt)] += 1;
#if DEBUG_CAMERA
if (fmt != SDL_PIXELFORMAT_UNKNOWN) {
@ -504,7 +483,7 @@ GetNumFormats(SDL_CameraDevice *_this)
int h = entry.data.i32[i + 2];
SDL_Log("Got format android 0x%08x -> %s %d x %d", format, SDL_GetPixelFormatName(fmt), w, h);
} else {
unknown += 1;
unknown = SDL_TRUE;
}
#endif
}
@ -526,10 +505,8 @@ GetNumFormats(SDL_CameraDevice *_this)
return _this->hidden->num_formats;
}
int
GetFormat(SDL_CameraDevice *_this, int index, Uint32 *format)
int GetFormat(SDL_CameraDevice *_this, int index, Uint32 *format)
{
int i;
int i2 = 0;
if (_this->hidden->num_formats == 0) {
@ -537,16 +514,17 @@ GetFormat(SDL_CameraDevice *_this, int index, Uint32 *format)
}
if (index < 0 || index >= _this->hidden->num_formats) {
// !!! FIXME: call SDL_SetError()?
return -1;
}
for (i = 0; i < SDL_arraysize(_this->hidden->count_formats); i++) {
for (int i = 0; i < SDL_arraysize(_this->hidden->count_formats); i++) {
if (_this->hidden->count_formats[i] == 0) {
continue;
}
if (i2 == index) {
*format = id_2_format(i);
*format = id_to_format(i);
}
i2++;
@ -555,17 +533,17 @@ GetFormat(SDL_CameraDevice *_this, int index, Uint32 *format)
return 0;
}
int
GetNumFrameSizes(SDL_CameraDevice *_this, Uint32 format)
int GetNumFrameSizes(SDL_CameraDevice *_this, Uint32 format)
{
int i, i2 = 0, index;
// !!! FIXME: call SDL_SetError()?
if (_this->hidden->num_formats == 0) {
GetNumFormats(_this);
}
index = format_2_id(format);
const int index = format_to_id(format);
for (i = 0; i < SDL_arraysize(_this->hidden->count_formats); i++) {
int i2 = 0;
for (int i = 0; i < SDL_arraysize(_this->hidden->count_formats); i++) {
if (_this->hidden->count_formats[i] == 0) {
continue;
}
@ -581,11 +559,10 @@ GetNumFrameSizes(SDL_CameraDevice *_this, Uint32 format)
return -1;
}
int
GetFrameSize(SDL_CameraDevice *_this, Uint32 format, int index, int *width, int *height)
int GetFrameSize(SDL_CameraDevice *_this, Uint32 format, int index, int *width, int *height)
{
// !!! FIXME: call SDL_SetError()?
camera_status_t res;
int i, i2 = 0;
ACameraMetadata *metadata;
ACameraMetadata_const_entry entry;
@ -603,19 +580,18 @@ GetFrameSize(SDL_CameraDevice *_this, Uint32 format, int index, int *width, int
return -1;
}
for (i = 0; i < entry.count; i += 4) {
int i2 = 0;
for (int i = 0; i < entry.count; i += 4) {
int32_t f = entry.data.i32[i + 0];
int w = entry.data.i32[i + 1];
int h = entry.data.i32[i + 2];
const int w = entry.data.i32[i + 1];
const int h = entry.data.i32[i + 2];
int32_t type = entry.data.i32[i + 3];
Uint32 fmt;
if (type == ACAMERA_SCALER_AVAILABLE_STREAM_CONFIGURATIONS_INPUT) {
continue;
}
fmt = format_android_2_sdl(f);
Uint32 fmt = format_android_to_sdl(f);
if (fmt != format) {
continue;
}
@ -628,33 +604,11 @@ GetFrameSize(SDL_CameraDevice *_this, Uint32 format, int index, int *width, int
i2++;
}
return -1;
}
static int GetNumDevices(void);
int
GetCameraDeviceName(SDL_CameraDeviceID instance_id, char *buf, int size)
{
int index = instance_id - 1;
create_cameraMgr();
if (cameraIdList == NULL) {
GetNumDevices();
}
if (cameraIdList) {
if (index >= 0 && index < cameraIdList->numCameras) {
SDL_snprintf(buf, size, "%s", cameraIdList->cameraIds[index]);
return 0;
}
}
return -1;
}
static int
GetNumDevices(void)
static int GetNumDevices(void)
{
camera_status_t res;
create_cameraMgr();
@ -674,37 +628,55 @@ GetNumDevices(void)
return -1;
}
int GetCameraDeviceName(SDL_CameraDeviceID instance_id, char *buf, int size)
{
// !!! FIXME: call SDL_SetError()?
int index = instance_id - 1;
create_cameraMgr();
if (cameraIdList == NULL) {
GetNumDevices();
}
if (cameraIdList) {
if (index >= 0 && index < cameraIdList->numCameras) {
SDL_snprintf(buf, size, "%s", cameraIdList->cameraIds[index]);
return 0;
}
}
return -1;
}
SDL_CameraDeviceID *GetCameraDevices(int *count)
{
/* hard-coded list of ID */
int i;
int num = GetNumDevices();
SDL_CameraDeviceID *ret;
// hard-coded list of ID
const int num = GetNumDevices();
SDL_CameraDeviceID *retval = (SDL_CameraDeviceID *)SDL_malloc((num + 1) * sizeof(*ret));
ret = (SDL_CameraDeviceID *)SDL_malloc((num + 1) * sizeof(*ret));
if (ret == NULL) {
if (retval == NULL) {
SDL_OutOfMemory();
*count = 0;
return NULL;
}
for (i = 0; i < num; i++) {
ret[i] = i + 1;
for (int i = 0; i < num; i++) {
retval[i] = i + 1;
}
ret[num] = 0;
retval[num] = 0;
*count = num;
return ret;
return retval;
}
int SDL_SYS_CameraInit(void) {
int SDL_SYS_CameraInit(void)
{
return 0;
}
int SDL_SYS_CameraQuit(void) {
int SDL_SYS_CameraQuit(void)
{
return 0;
}
#endif

191
src/camera/apple/SDL_camera_apple.m
View File

@ -1,6 +1,6 @@
/*
Simple DirectMedia Layer
Copyright (C) 2021 Valve Corporation
Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
@ -27,7 +27,7 @@
#include "../thread/SDL_systhread.h"
#if defined(HAVE_COREMEDIA) && defined(SDL_PLATFORM_MACOS) && (__MAC_OS_X_VERSION_MAX_ALLOWED < 101500)
/* AVCaptureDeviceTypeBuiltInWideAngleCamera requires macOS SDK 10.15 */
// AVCaptureDeviceTypeBuiltInWideAngleCamera requires macOS SDK 10.15
#undef HAVE_COREMEDIA
#endif
@ -35,7 +35,9 @@
#undef HAVE_COREMEDIA
#endif
#ifndef HAVE_COREMEDIA /* !!! FIXME: use the dummy driver. */
// !!! FIXME: use the dummy driver
// !!! FIXME: actually, move everything over to backend callbacks instead.
#ifndef HAVE_COREMEDIA
int InitDevice(SDL_CameraDevice *_this) {
return -1;
}
@ -119,16 +121,14 @@ struct SDL_PrivateCameraData
CMSimpleQueueRef frame_queue;
};
static NSString *
fourcc_to_nstring(Uint32 code)
static NSString *fourcc_to_nstring(Uint32 code)
{
Uint8 buf[4];
*(Uint32 *)buf = code;
return [NSString stringWithFormat:@"%c%c%c%c", buf[3], buf[2], buf[1], buf[0]];
}
static NSArray<AVCaptureDevice *> *
discover_devices()
static NSArray<AVCaptureDevice *> *DiscoverCameraDevices()
{
NSArray *deviceType = @[AVCaptureDeviceTypeBuiltInWideAngleCamera];
@ -154,10 +154,9 @@ discover_devices()
return devices;
}
static AVCaptureDevice *
get_device_by_name(const char *dev_name)
static AVCaptureDevice *GetCameraDeviceByName(const char *dev_name)
{
NSArray<AVCaptureDevice *> *devices = discover_devices();
NSArray<AVCaptureDevice *> *devices = DiscoverCameraDevices();
for (AVCaptureDevice *device in devices) {
char buf[1024];
@ -171,21 +170,20 @@ get_device_by_name(const char *dev_name)
return nil;
}
static Uint32
nsfourcc_to_sdlformat(NSString *nsfourcc)
static Uint32 nsfourcc_to_sdlformat(NSString *nsfourcc)
{
const char *str = [nsfourcc UTF8String];
/* FIXME
* on IOS this mode gives 2 planes, and it's NV12
* on macos, 1 plane/ YVYU
*
*/
#ifdef SDL_PLATFORM_MACOS
if (SDL_strcmp("420v", str) == 0) return SDL_PIXELFORMAT_YVYU;
#else
if (SDL_strcmp("420v", str) == 0) return SDL_PIXELFORMAT_NV12;
#endif
if (SDL_strcmp("yuvs", str) == 0) return SDL_PIXELFORMAT_UYVY;
if (SDL_strcmp("420f", str) == 0) return SDL_PIXELFORMAT_UNKNOWN;
@ -194,8 +192,7 @@ nsfourcc_to_sdlformat(NSString *nsfourcc)
return SDL_PIXELFORMAT_UNKNOWN;
}
static NSString *
sdlformat_to_nsfourcc(Uint32 fmt)
static NSString *sdlformat_to_nsfourcc(Uint32 fmt)
{
const char *str = "";
NSString *result;
@ -207,9 +204,7 @@ sdlformat_to_nsfourcc(Uint32 fmt)
#endif
if (fmt == SDL_PIXELFORMAT_UYVY) str = "yuvs";
result = [[NSString alloc] initWithUTF8String: str];
return result;
return [[NSString alloc] initWithUTF8String: str];
}
@ -234,27 +229,21 @@ sdlformat_to_nsfourcc(Uint32 fmt)
- (void)captureOutput:(AVCaptureOutput *)output
didDropSampleBuffer:(CMSampleBufferRef)sampleBuffer
fromConnection:(AVCaptureConnection *)connection {
// !!! FIXME #if DEBUG_CAMERA
SDL_Log("Drop frame..");
}
@end
int
OpenDevice(SDL_CameraDevice *_this)
int OpenDevice(SDL_CameraDevice *_this)
{
_this->hidden = (struct SDL_PrivateCameraData *) SDL_calloc(1, sizeof (struct SDL_PrivateCameraData));
if (_this->hidden == NULL) {
SDL_OutOfMemory();
goto error;
return SDL_OutOfMemory();
}
return 0;
error:
return -1;
}
void
CloseDevice(SDL_CameraDevice *_this)
void CloseDevice(SDL_CameraDevice *_this)
{
if (!_this) {
return;
@ -282,9 +271,9 @@ CloseDevice(SDL_CameraDevice *_this)
}
}
int
InitDevice(SDL_CameraDevice *_this)
int InitDevice(SDL_CameraDevice *_this)
{
// !!! FIXME: autorelease pool?
NSString *fmt = sdlformat_to_nsfourcc(_this->spec.format);
int w = _this->spec.width;
int h = _this->spec.height;
@ -298,13 +287,13 @@ InitDevice(SDL_CameraDevice *_this)
#ifdef SDL_PLATFORM_MACOS
if (@available(macOS 10.15, *)) {
/* good. */
// good.
} else {
return -1;
}
#endif
device = get_device_by_name(_this->dev_name);
device = GetCameraDeviceByName(_this->dev_name);
if (!device) {
goto error;
}
@ -317,13 +306,12 @@ InitDevice(SDL_CameraDevice *_this)
[_this->hidden->session setSessionPreset:AVCaptureSessionPresetHigh];
// Pick format that matches the spec
{
NSArray<AVCaptureDeviceFormat *> *formats = [device formats];
for (AVCaptureDeviceFormat *format in formats) {
CMFormatDescriptionRef formatDescription = [format formatDescription];
FourCharCode mediaSubType = CMFormatDescriptionGetMediaSubType(formatDescription);
NSString *str = fourcc_to_nstring(mediaSubType);
if (str == fmt) {
if ([str isEqualToString:fmt]) {
CMVideoDimensions dim = CMVideoFormatDescriptionGetDimensions(formatDescription);
if (dim.width == w && dim.height == h) {
spec_format = format;
@ -334,8 +322,7 @@ InitDevice(SDL_CameraDevice *_this)
}
if (spec_format == nil) {
SDL_SetError("format not found");
goto error;
return SDL_SetError("format not found");
}
// Set format
@ -343,15 +330,13 @@ InitDevice(SDL_CameraDevice *_this)
device.activeFormat = spec_format;
[device unlockForConfiguration];
} else {
SDL_SetError("Cannot lockForConfiguration");
goto error;
return SDL_SetError("Cannot lockForConfiguration");
}
// Input
input = [AVCaptureDeviceInput deviceInputWithDevice:device error:&error];
if (!input) {
SDL_SetError("Cannot create AVCaptureDeviceInput");
goto error;
return SDL_SetError("Cannot create AVCaptureDeviceInput");
}
// Output
@ -373,105 +358,85 @@ InitDevice(SDL_CameraDevice *_this)
CMSimpleQueueCreate(kCFAllocatorDefault, 30 /* buffers */, &_this->hidden->frame_queue);
if (_this->hidden->frame_queue == nil) {
goto error;
return SDL_SetError("CMSimpleQueueCreate() failed");
}
_this->hidden->queue = dispatch_queue_create("my_queue", NULL);
[output setSampleBufferDelegate:_this->hidden->delegate queue:_this->hidden->queue];
if ([_this->hidden->session canAddInput:input] ){
[_this->hidden->session addInput:input];
} else {
SDL_SetError("Cannot add AVCaptureDeviceInput");
goto error;
return SDL_SetError("Cannot add AVCaptureDeviceInput");
}
if ([_this->hidden->session canAddOutput:output] ){
[_this->hidden->session addOutput:output];
} else {
SDL_SetError("Cannot add AVCaptureVideoDataOutput");
goto error;
return SDL_SetError("Cannot add AVCaptureVideoDataOutput");
}
[_this->hidden->session commitConfiguration];
return 0;
error:
return -1;
}
int
GetDeviceSpec(SDL_CameraDevice *_this, SDL_CameraSpec *spec)
int GetDeviceSpec(SDL_CameraDevice *_this, SDL_CameraSpec *spec)
{
// !!! FIXME: make sure higher level checks spec != NULL
if (spec) {
*spec = _this->spec;
SDL_copyp(spec, &_this->spec);
return 0;
}
return -1;
}
int
StartCamera(SDL_CameraDevice *_this)
int StartCamera(SDL_CameraDevice *_this)
{
[_this->hidden->session startRunning];
return 0;
}
int
StopCamera(SDL_CameraDevice *_this)
int StopCamera(SDL_CameraDevice *_this)
{
[_this->hidden->session stopRunning];
return 0;
}
int
AcquireFrame(SDL_CameraDevice *_this, SDL_CameraFrame *frame)
int AcquireFrame(SDL_CameraDevice *_this, SDL_CameraFrame *frame)
{
if (CMSimpleQueueGetCount(_this->hidden->frame_queue) > 0) {
int i, numPlanes, planar;
CMSampleBufferRef sampleBuffer;
CVImageBufferRef image;
sampleBuffer = (CMSampleBufferRef)CMSimpleQueueDequeue(_this->hidden->frame_queue);
CMSampleBufferRef sampleBuffer = (CMSampleBufferRef)CMSimpleQueueDequeue(_this->hidden->frame_queue);
frame->internal = (void *) sampleBuffer;
frame->timestampNS = SDL_GetTicksNS();
i = 0;
image = CMSampleBufferGetImageBuffer(sampleBuffer);
numPlanes = CVPixelBufferGetPlaneCount(image);
planar = CVPixelBufferIsPlanar(image);
CVImageBufferRef image = CMSampleBufferGetImageBuffer(sampleBuffer);
const int numPlanes = CVPixelBufferGetPlaneCount(image);
const int planar = CVPixelBufferIsPlanar(image);
#if 0
int w = CVPixelBufferGetWidth(image);
int h = CVPixelBufferGetHeight(image);
int sz = CVPixelBufferGetDataSize(image);
int pitch = CVPixelBufferGetBytesPerRow(image);
const int w = CVPixelBufferGetWidth(image);
const int h = CVPixelBufferGetHeight(image);
const int sz = CVPixelBufferGetDataSize(image);
const int pitch = CVPixelBufferGetBytesPerRow(image);
SDL_Log("buffer planar=%d count:%d %d x %d sz=%d pitch=%d", planar, numPlanes, w, h, sz, pitch);
#endif
CVPixelBufferLockBaseAddress(image, 0);
if (planar == 0 && numPlanes == 0) {
if ((planar == 0) && (numPlanes == 0)) {
frame->pitch[0] = CVPixelBufferGetBytesPerRow(image);
frame->data[0] = CVPixelBufferGetBaseAddress(image);
frame->num_planes = 1;
} else {
for (i = 0; i < numPlanes && i < 3; i++) {
int rowStride = 0;
uint8_t *data = NULL;
for (int i = 0; (i < numPlanes) && (i < 3); i++) {
frame->num_planes += 1;
rowStride = CVPixelBufferGetBytesPerRowOfPlane(image, i);
data = CVPixelBufferGetBaseAddressOfPlane(image, i);
frame->data[i] = data;
frame->pitch[i] = rowStride;
frame->data[i] = CVPixelBufferGetBaseAddressOfPlane(image, i);
frame->pitch[i] = CVPixelBufferGetBytesPerRowOfPlane(image, i);
}
}
/* Unlocked when frame is released */
// Unlocked when frame is released
} else {
// no frame
SDL_Delay(20); // TODO fix some delay
@ -479,24 +444,21 @@ AcquireFrame(SDL_CameraDevice *_this, SDL_CameraFrame *frame)
return 0;
}
int
ReleaseFrame(SDL_CameraDevice *_this, SDL_CameraFrame *frame)
int ReleaseFrame(SDL_CameraDevice *_this, SDL_CameraFrame *frame)
{
if (frame->internal) {
CMSampleBufferRef sampleBuffer = (CMSampleBufferRef) frame->internal;
CVImageBufferRef image = CMSampleBufferGetImageBuffer(sampleBuffer);
CVPixelBufferUnlockBaseAddress(image, 0);
CFRelease(sampleBuffer);
}
return 0;
}
int
GetNumFormats(SDL_CameraDevice *_this)
int GetNumFormats(SDL_CameraDevice *_this)
{
AVCaptureDevice *device = get_device_by_name(_this->dev_name);
AVCaptureDevice *device = GetCameraDeviceByName(_this->dev_name);
if (device) {
// LIST FORMATS
NSMutableOrderedSet<NSString *> *array_formats = [NSMutableOrderedSet new];
@ -514,10 +476,9 @@ GetNumFormats(SDL_CameraDevice *_this)
return 0;
}
int
GetFormat(SDL_CameraDevice *_this, int index, Uint32 *format)
int GetFormat(SDL_CameraDevice *_this, int index, Uint32 *format)
{
AVCaptureDevice *device = get_device_by_name(_this->dev_name);
AVCaptureDevice *device = GetCameraDeviceByName(_this->dev_name);
if (device) {
// LIST FORMATS
NSMutableOrderedSet<NSString *> *array_formats = [NSMutableOrderedSet new];
@ -542,10 +503,9 @@ GetFormat(SDL_CameraDevice *_this, int index, Uint32 *format)
return -1;
}
int
GetNumFrameSizes(SDL_CameraDevice *_this, Uint32 format)
int GetNumFrameSizes(SDL_CameraDevice *_this, Uint32 format)
{
AVCaptureDevice *device = get_device_by_name(_this->dev_name);
AVCaptureDevice *device = GetCameraDeviceByName(_this->dev_name);
if (device) {
NSString *fmt = sdlformat_to_nsfourcc(format);
int count = 0;
@ -556,8 +516,8 @@ GetNumFrameSizes(SDL_CameraDevice *_this, Uint32 format)
FourCharCode mediaSubType = CMFormatDescriptionGetMediaSubType(formatDescription);
NSString *str = fourcc_to_nstring(mediaSubType);
if (str == fmt) {
count += 1;
if ([str isEqualToString:fmt]) {
count++;
}
}
return count;
@ -568,7 +528,7 @@ GetNumFrameSizes(SDL_CameraDevice *_this, Uint32 format)
int
GetFrameSize(SDL_CameraDevice *_this, Uint32 format, int index, int *width, int *height)
{
AVCaptureDevice *device = get_device_by_name(_this->dev_name);
AVCaptureDevice *device = GetCameraDeviceByName(_this->dev_name);
if (device) {
NSString *fmt = sdlformat_to_nsfourcc(format);
int count = 0;
@ -579,25 +539,24 @@ GetFrameSize(SDL_CameraDevice *_this, Uint32 format, int index, int *width, int
FourCharCode mediaSubType = CMFormatDescriptionGetMediaSubType(formatDescription);
NSString *str = fourcc_to_nstring(mediaSubType);
if (str == fmt) {
if ([str isEqualToString:fmt]) {
if (index == count) {
CMVideoDimensions dim = CMVideoFormatDescriptionGetDimensions(formatDescription);
*width = dim.width;
*height = dim.height;
return 0;
}
count += 1;
count++;
}
}
}
return -1;
}
int
GetCameraDeviceName(SDL_CameraDeviceID instance_id, char *buf, int size)
int GetCameraDeviceName(SDL_CameraDeviceID instance_id, char *buf, int size)
{
int index = instance_id - 1;
NSArray<AVCaptureDevice *> *devices = discover_devices();
NSArray<AVCaptureDevice *> *devices = DiscoverCameraDevices();
if (index < [devices count]) {
AVCaptureDevice *device = devices[index];
NSString *cameraID = [device localizedName];
@ -608,32 +567,28 @@ GetCameraDeviceName(SDL_CameraDeviceID instance_id, char *buf, int size)
return -1;
}
static int
GetNumDevices(void)
static int GetNumDevices(void)
{
NSArray<AVCaptureDevice *> *devices = discover_devices();
NSArray<AVCaptureDevice *> *devices = DiscoverCameraDevices();
return [devices count];
}
SDL_CameraDeviceID *GetCameraDevices(int *count)
{
/* hard-coded list of ID */
int i;
int num = GetNumDevices();
SDL_CameraDeviceID *ret;
// hard-coded list of ID
const int num = GetNumDevices();
SDL_CameraDeviceID *retval = (SDL_CameraDeviceID *)SDL_calloc((num + 1), sizeof(*ret));
ret = (SDL_CameraDeviceID *)SDL_malloc((num + 1) * sizeof(*ret));
if (ret == NULL) {
if (retval == NULL) {
SDL_OutOfMemory();
*count = 0;
return NULL;
}
for (i = 0; i < num; i++) {
ret[i] = i + 1;
for (int i = 0; i < num; i++) {
retval[i] = i + 1;
}
ret[num] = 0;
retval[num] = 0;
*count = num;
return ret;
}
@ -648,7 +603,7 @@ int SDL_SYS_CameraQuit(void)
return 0;
}
#endif /* HAVE_COREMEDIA */
#endif // HAVE_COREMEDIA
#endif /* SDL_CAMERA_APPLE */
#endif // SDL_CAMERA_APPLE

282
src/camera/v4l2/SDL_camera_v4l2.c
View File

@ -28,27 +28,25 @@
#include "../../thread/SDL_systhread.h"
#include "../../core/linux/SDL_evdev_capabilities.h"
#include "../../core/linux/SDL_udev.h"
#include <limits.h> /* INT_MAX */
#include <limits.h> // INT_MAX
#define DEBUG_CAMERA 1
#define MAX_CAMERA_DEVICES 128 /* It's doubtful someone has more than that */
#define MAX_CAMERA_DEVICES 128 // It's doubtful someone has more than that
static int MaybeAddDevice(const char *path);
#ifdef SDL_USE_LIBUDEV
static int MaybeRemoveDevice(const char *path);
static void camera_udev_callback(SDL_UDEV_deviceevent udev_type, int udev_class, const char *devpath);
#endif /* SDL_USE_LIBUDEV */
static void CameraUdevCallback(SDL_UDEV_deviceevent udev_type, int udev_class, const char *devpath);
#endif // SDL_USE_LIBUDEV
/*
* List of available camera devices.
*/
// List of available camera devices.
typedef struct SDL_cameralist_item
{
char *fname; /* Dev path name (like /dev/video0) */
char *bus_info; /* don't add two paths with same bus_info (eg /dev/video0 and /dev/video1 */
char *fname; // Dev path name (like /dev/video0)
char *bus_info; // don't add two paths with same bus_info (eg /dev/video0 and /dev/video1
SDL_CameraDeviceID instance_id;
SDL_CameraDevice *device; /* Associated device */
SDL_CameraDevice *device; // Associated device
struct SDL_cameralist_item *next;
} SDL_cameralist_item;
@ -67,7 +65,7 @@ enum io_method {
struct buffer {
void *start;
size_t length;
int available; /* Is available in userspace */
int available; // Is available in userspace
};
struct SDL_PrivateCameraData
@ -82,34 +80,30 @@ struct SDL_PrivateCameraData
#include <unistd.h>
#include <sys/ioctl.h>
#include <fcntl.h> /* low-level i/o */
#include <fcntl.h> // low-level i/o
#include <errno.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <linux/videodev2.h>
static int
xioctl(int fh, int request, void *arg)
static int xioctl(int fh, int request, void *arg)
{
int r;
do {
r = ioctl(fh, request, arg);
} while (r == -1 && errno == EINTR);
} while ((r == -1) && (errno == EINTR));
return r;
}
/* -1:error 1:frame 0:no frame*/
static int
acquire_frame(SDL_CameraDevice *_this, SDL_CameraFrame *frame)
// -1:error 1:frame 0:no frame
static int acquire_frame(SDL_CameraDevice *_this, SDL_CameraFrame *frame)
{
struct v4l2_buffer buf;
int i;
int fd = _this->hidden->fd;
const int fd = _this->hidden->fd;
enum io_method io = _this->hidden->io;
size_t size = _this->hidden->buffers[0].length;
struct v4l2_buffer buf;
switch (io) {
case IO_METHOD_READ:
@ -119,9 +113,8 @@ acquire_frame(SDL_CameraDevice *_this, SDL_CameraFrame *frame)
return 0;
case EIO:
/* Could ignore EIO, see spec. */
/* fall through */
// Could ignore EIO, see spec.
// fall through
default:
return SDL_SetError("read");
@ -145,9 +138,8 @@ acquire_frame(SDL_CameraDevice *_this, SDL_CameraFrame *frame)
return 0;
case EIO:
/* Could ignore EIO, see spec. */
/* fall through */
// Could ignore EIO, see spec.
// fall through
default:
return SDL_SetError("VIDIOC_DQBUF: %d", errno);
@ -180,15 +172,16 @@ acquire_frame(SDL_CameraDevice *_this, SDL_CameraFrame *frame)
return 0;
case EIO:
/* Could ignore EIO, see spec. */
// Could ignore EIO, see spec.
/* fall through */
// fall through
default:
return SDL_SetError("VIDIOC_DQBUF");
}
}
int i;
for (i = 0; i < _this->hidden->nb_buffers; ++i) {
if (buf.m.userptr == (unsigned long)_this->hidden->buffers[i].start && buf.length == size) {
break;
@ -213,13 +206,12 @@ acquire_frame(SDL_CameraDevice *_this, SDL_CameraFrame *frame)
}
int
ReleaseFrame(SDL_CameraDevice *_this, SDL_CameraFrame *frame)
int ReleaseFrame(SDL_CameraDevice *_this, SDL_CameraFrame *frame)
{
struct v4l2_buffer buf;
int i;
int fd = _this->hidden->fd;
const int fd = _this->hidden->fd;
enum io_method io = _this->hidden->io;
int i;
for (i = 0; i < _this->hidden->nb_buffers; ++i) {
if (frame->num_planes && frame->data[0] == _this->hidden->buffers[i].start) {
@ -268,25 +260,23 @@ ReleaseFrame(SDL_CameraDevice *_this, SDL_CameraFrame *frame)
}
int
AcquireFrame(SDL_CameraDevice *_this, SDL_CameraFrame *frame)
int AcquireFrame(SDL_CameraDevice *_this, SDL_CameraFrame *frame)
{
fd_set fds;
struct timeval tv;
int ret;
int fd = _this->hidden->fd;
const int fd = _this->hidden->fd;
FD_ZERO(&fds);
FD_SET(fd, &fds);
/* Timeout. */
// Timeout.
tv.tv_sec = 0;
tv.tv_usec = 300 * 1000;
ret = select(fd + 1, &fds, NULL, NULL, &tv);
int retval = select(fd + 1, &fds, NULL, NULL, &tv);
if (ret == -1) {
if (retval == -1) {
if (errno == EINTR) {
#if DEBUG_CAMERA
SDL_Log("continue ..");
@ -296,35 +286,34 @@ AcquireFrame(SDL_CameraDevice *_this, SDL_CameraFrame *frame)
return SDL_SetError("select");
}
if (ret == 0) {
/* Timeout. Not an error */
if (retval == 0) {
// Timeout. Not an error
SDL_SetError("timeout select");
return 0;
}
ret = acquire_frame(_this, frame);
if (ret < 0) {
retval = acquire_frame(_this, frame);
if (retval < 0) {
return -1;
}
if (ret == 1){
if (retval == 1){
frame->timestampNS = SDL_GetTicksNS();
} else if (ret == 0) {
} else if (retval == 0) {
#if DEBUG_CAMERA
SDL_Log("No frame continue: %s", SDL_GetError());
#endif
}
/* EAGAIN - continue select loop. */
// EAGAIN - continue select loop.
return 0;
}
int
StopCamera(SDL_CameraDevice *_this)
int StopCamera(SDL_CameraDevice *_this)
{
enum v4l2_buf_type type;
int fd = _this->hidden->fd;
const int fd = _this->hidden->fd;
enum io_method io = _this->hidden->io;
switch (io) {
@ -343,18 +332,16 @@ StopCamera(SDL_CameraDevice *_this)
return 0;
}
static int
enqueue_buffers(SDL_CameraDevice *_this)
static int EnqueueBuffers(SDL_CameraDevice *_this)
{
int i;
int fd = _this->hidden->fd;
const int fd = _this->hidden->fd;
enum io_method io = _this->hidden->io;
switch (io) {
case IO_METHOD_READ:
break;
case IO_METHOD_MMAP:
for (i = 0; i < _this->hidden->nb_buffers; ++i) {
for (int i = 0; i < _this->hidden->nb_buffers; ++i) {
if (_this->hidden->buffers[i].available == 0) {
struct v4l2_buffer buf;
@ -371,7 +358,7 @@ enqueue_buffers(SDL_CameraDevice *_this)
break;
case IO_METHOD_USERPTR:
for (i = 0; i < _this->hidden->nb_buffers; ++i) {
for (int i = 0; i < _this->hidden->nb_buffers; ++i) {
if (_this->hidden->buffers[i].available == 0) {
struct v4l2_buffer buf;
@ -392,11 +379,10 @@ enqueue_buffers(SDL_CameraDevice *_this)
return 0;
}
static int
pre_enqueue_buffers(SDL_CameraDevice *_this)
static int PreEnqueueBuffers(SDL_CameraDevice *_this)
{
struct v4l2_requestbuffers req;
int fd = _this->hidden->fd;
const int fd = _this->hidden->fd;
enum io_method io = _this->hidden->io;
switch (io) {
@ -404,7 +390,6 @@ pre_enqueue_buffers(SDL_CameraDevice *_this)
break;
case IO_METHOD_MMAP:
{
SDL_zero(req);
req.count = _this->hidden->nb_buffers;
req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
@ -423,11 +408,9 @@ pre_enqueue_buffers(SDL_CameraDevice *_this)
}
_this->hidden->nb_buffers = req.count;
}
break;
case IO_METHOD_USERPTR:
{
SDL_zero(req);
req.count = _this->hidden->nb_buffers;
req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
@ -440,40 +423,36 @@ pre_enqueue_buffers(SDL_CameraDevice *_this)
return SDL_SetError("VIDIOC_REQBUFS");
}
}
}
break;
}
return 0;
}
int
StartCamera(SDL_CameraDevice *_this)
int StartCamera(SDL_CameraDevice *_this)
{
enum v4l2_buf_type type;
int fd = _this->hidden->fd;
const int fd = _this->hidden->fd;
enum io_method io = _this->hidden->io;
if (_this->hidden->first_start == 0) {
_this->hidden->first_start = 1;
} else {
int old = _this->hidden->nb_buffers;
const int old = _this->hidden->nb_buffers;
// TODO mmap; doesn't work with stop->start
#if 1
/* Can change nb_buffers for mmap */
if (pre_enqueue_buffers(_this) < 0) {
return -1;
}
if (old != _this->hidden->nb_buffers) {
SDL_SetError("different nb of buffers requested");
// Can change nb_buffers for mmap
if (PreEnqueueBuffers(_this) < 0) {
return -1;
} else if (old != _this->hidden->nb_buffers) {
return SDL_SetError("different nb of buffers requested");
}
#endif
_this->hidden->first_start = 1;
}
if (enqueue_buffers(_this) < 0) {
if (EnqueueBuffers(_this) < 0) {
return -1;
}
@ -493,7 +472,7 @@ StartCamera(SDL_CameraDevice *_this)
return 0;
}
static int alloc_buffer_read(SDL_CameraDevice *_this, size_t buffer_size)
static int AllocBufferRead(SDL_CameraDevice *_this, size_t buffer_size)
{
_this->hidden->buffers[0].length = buffer_size;
_this->hidden->buffers[0].start = SDL_calloc(1, buffer_size);
@ -505,7 +484,7 @@ static int alloc_buffer_read(SDL_CameraDevice *_this, size_t buffer_size)
}
static int
alloc_buffer_mmap(SDL_CameraDevice *_this)
AllocBufferMmap(SDL_CameraDevice *_this)
{
int fd = _this->hidden->fd;
int i;
@ -538,7 +517,7 @@ alloc_buffer_mmap(SDL_CameraDevice *_this)
}
static int
alloc_buffer_userp(SDL_CameraDevice *_this, size_t buffer_size)
AllocBufferUserPtr(SDL_CameraDevice *_this, size_t buffer_size)
{
int i;
for (i = 0; i < _this->hidden->nb_buffers; ++i) {
@ -708,12 +687,12 @@ GetDeviceSpec(SDL_CameraDevice *_this, SDL_CameraSpec *spec)
SDL_zero(fmt);
fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
/* Preserve original settings as set by v4l2-ctl for example */
// Preserve original settings as set by v4l2-ctl for example
if (xioctl(fd, VIDIOC_G_FMT, &fmt) == -1) {
return SDL_SetError("Error VIDIOC_G_FMT");
}
/* Buggy driver paranoia. */
// Buggy driver paranoia.
min = fmt.fmt.pix.width * 2;
if (fmt.fmt.pix.bytesperline < min) {
fmt.fmt.pix.bytesperline = min;
@ -739,29 +718,29 @@ InitDevice(SDL_CameraDevice *_this)
int fd = _this->hidden->fd;
enum io_method io = _this->hidden->io;
int ret = -1;
int retval = -1;
/* Select video input, video standard and tune here. */
// Select video input, video standard and tune here.
SDL_zero(cropcap);
cropcap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
if (xioctl(fd, VIDIOC_CROPCAP, &cropcap) == 0) {
crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
crop.c = cropcap.defrect; /* reset to default */
crop.c = cropcap.defrect; // reset to default
if (xioctl(fd, VIDIOC_S_CROP, &crop) == -1) {
switch (errno) {
case EINVAL:
/* Cropping not supported. */
// Cropping not supported.
break;
default:
/* Errors ignored. */
// Errors ignored.
break;
}
}
} else {
/* Errors ignored. */
// Errors ignored.
}
@ -790,7 +769,7 @@ InitDevice(SDL_CameraDevice *_this)
GetDeviceSpec(_this, &_this->spec);
if (pre_enqueue_buffers(_this) < 0) {
if (PreEnqueueBuffers(_this) < 0) {
return -1;
}
@ -807,28 +786,23 @@ InitDevice(SDL_CameraDevice *_this)
switch (io) {
case IO_METHOD_READ:
ret = alloc_buffer_read(_this, size);
retval = AllocBufferRead(_this, size);
break;
case IO_METHOD_MMAP:
ret = alloc_buffer_mmap(_this);
retval = AllocBufferMmap(_this);
break;
case IO_METHOD_USERPTR:
ret = alloc_buffer_userp(_this, size);
retval = AllocBufferUserPtr(_this, size);
break;
}
}
if (ret < 0) {
return -1;
return (retval < 0) ? -1 : 0;
}
return 0;
}
void
CloseDevice(SDL_CameraDevice *_this)
void CloseDevice(SDL_CameraDevice *_this)
{
if (!_this) {
return;
@ -836,7 +810,6 @@ CloseDevice(SDL_CameraDevice *_this)
if (_this->hidden) {
if (_this->hidden->buffers) {
int i;
enum io_method io = _this->hidden->io;
switch (io) {
@ -845,7 +818,7 @@ CloseDevice(SDL_CameraDevice *_this)
break;
case IO_METHOD_MMAP:
for (i = 0; i < _this->hidden->nb_buffers; ++i) {
for (int i = 0; i < _this->hidden->nb_buffers; ++i) {
if (munmap(_this->hidden->buffers[i].start, _this->hidden->buffers[i].length) == -1) {
SDL_SetError("munmap");
}
@ -853,7 +826,7 @@ CloseDevice(SDL_CameraDevice *_this)
break;
case IO_METHOD_USERPTR:
for (i = 0; i < _this->hidden->nb_buffers; ++i) {
for (int i = 0; i < _this->hidden->nb_buffers; ++i) {
SDL_free(_this->hidden->buffers[i].start);
}
break;
@ -864,7 +837,7 @@ CloseDevice(SDL_CameraDevice *_this)
if (_this->hidden->fd != -1) {
if (close(_this->hidden->fd)) {
SDL_SetError("close camera device");
SDL_SetError("close camera device"); // !!! FIXME: we probably won't ever see this error
}
}
SDL_free(_this->hidden);
@ -874,13 +847,12 @@ CloseDevice(SDL_CameraDevice *_this)
}
int
OpenDevice(SDL_CameraDevice *_this)
int OpenDevice(SDL_CameraDevice *_this)
{
struct stat st;
struct v4l2_capability cap;
int fd;
enum io_method io;
int fd;
_this->hidden = (struct SDL_PrivateCameraData *) SDL_calloc(1, sizeof (struct SDL_PrivateCameraData));
if (_this->hidden == NULL) {
@ -891,19 +863,11 @@ OpenDevice(SDL_CameraDevice *_this)
_this->hidden->fd = -1;
if (stat(_this->dev_name, &st) == -1) {
SDL_SetError("Cannot identify '%s': %d, %s", _this->dev_name, errno, strerror(errno));
return -1;
}
if (!S_ISCHR(st.st_mode)) {
SDL_SetError("%s is no device", _this->dev_name);
return -1;
}
fd = open(_this->dev_name, O_RDWR /* required */ | O_NONBLOCK, 0);
if (fd == -1) {
SDL_SetError("Cannot open '%s': %d, %s", _this->dev_name, errno, strerror(errno));
return -1;
return SDL_SetError("Cannot identify '%s': %d, %s", _this->dev_name, errno, strerror(errno));
} else if (!S_ISCHR(st.st_mode)) {
return SDL_SetError("%s is no device", _this->dev_name);
} else if ((fd = open(_this->dev_name, O_RDWR /* required */ | O_NONBLOCK, 0)) == -1) {
return SDL_SetError("Cannot open '%s': %d, %s", _this->dev_name, errno, strerror(errno));
}
_this->hidden->fd = fd;
@ -914,7 +878,7 @@ OpenDevice(SDL_CameraDevice *_this)
if (_this->hidden->io == IO_METHOD_READ) {
_this->hidden->nb_buffers = 1;
} else {
_this->hidden->nb_buffers = 8; /* Number of image as internal buffer, */
_this->hidden->nb_buffers = 8; // Number of image as internal buffer,
}
io = _this->hidden->io;
@ -954,14 +918,10 @@ OpenDevice(SDL_CameraDevice *_this)
break;
}
return 0;
}
int
GetCameraDeviceName(SDL_CameraDeviceID instance_id, char *buf, int size)
int GetCameraDeviceName(SDL_CameraDeviceID instance_id, char *buf, int size)
{
SDL_cameralist_item *item;
for (item = SDL_cameralist; item; item = item->next) {
@ -971,54 +931,46 @@ GetCameraDeviceName(SDL_CameraDeviceID instance_id, char *buf, int size)
}
}
/* unknown instance_id */
// unknown instance_id
return -1;
}
SDL_CameraDeviceID *GetCameraDevices(int *count)
{
/* real list of ID */
int i = 0;
int num = num_cameras;
SDL_CameraDeviceID *ret;
SDL_cameralist_item *item;
// real list of ID
const int num = num_cameras;
SDL_CameraDeviceID *retval = (SDL_CameraDeviceID *)SDL_malloc((num + 1) * sizeof(*retval));
ret = (SDL_CameraDeviceID *)SDL_malloc((num + 1) * sizeof(*ret));
if (ret == NULL) {
if (retval == NULL) {
SDL_OutOfMemory();
*count = 0;
return NULL;
}
for (item = SDL_cameralist; item; item = item->next) {
ret[i] = item->instance_id;
i++;
int i = 0;
for (SDL_cameralist_item *item = SDL_cameralist; item; item = item->next) {
retval[i++] = item->instance_id;
}
ret[num] = 0;
retval[num] = 0;
*count = num;
return ret;
return retval;
}
/*
* Initializes the subsystem by finding available devices.
*/
// Initializes the subsystem by finding available devices.
int SDL_SYS_CameraInit(void)
{
const char pattern[] = "/dev/video%d";
char path[PATH_MAX];
int i, j;
/*
* Limit amount of checks to MAX_CAMERA_DEVICES since we may or may not have
* permission to some or all devices.
*/
i = 0;
for (j = 0; j < MAX_CAMERA_DEVICES; ++j) {
(void)SDL_snprintf(path, PATH_MAX, pattern, i++);
for (int i = 0; i < MAX_CAMERA_DEVICES; i++) {
(void)SDL_snprintf(path, PATH_MAX, pattern, i);
if (MaybeAddDevice(path) == -2) {
break;
}
@ -1027,27 +979,22 @@ int SDL_SYS_CameraInit(void)
#ifdef SDL_USE_LIBUDEV
if (SDL_UDEV_Init() < 0) {
return SDL_SetError("Could not initialize UDEV");
}
if (SDL_UDEV_AddCallback(camera_udev_callback) < 0) {
} else if (SDL_UDEV_AddCallback(CameraUdevCallback) < 0) {
SDL_UDEV_Quit();
return SDL_SetError("Could not setup Video Capture <-> udev callback");
}
/* Force a scan to build the initial device list */
// Force a scan to build the initial device list
SDL_UDEV_Scan();
#endif /* SDL_USE_LIBUDEV */
#endif // SDL_USE_LIBUDEV
return num_cameras;
}
int SDL_SYS_CameraQuit(void)
{
SDL_cameralist_item *item;
for (item = SDL_cameralist; item; ) {
for (SDL_cameralist_item *item = SDL_cameralist; item; ) {
SDL_cameralist_item *tmp = item->next;
SDL_free(item->fname);
SDL_free(item->bus_info);
SDL_free(item);
@ -1062,7 +1009,7 @@ int SDL_SYS_CameraQuit(void)
}
#ifdef SDL_USE_LIBUDEV
static void camera_udev_callback(SDL_UDEV_deviceevent udev_type, int udev_class, const char *devpath)
static void CameraUdevCallback(SDL_UDEV_deviceevent udev_type, int udev_class, const char *devpath)
{
if (!devpath || !(udev_class & SDL_UDEV_DEVICE_VIDEO_CAPTURE)) {
return;
@ -1081,17 +1028,15 @@ static void camera_udev_callback(SDL_UDEV_deviceevent udev_type, int udev_class,
break;
}
}
#endif /* SDL_USE_LIBUDEV */
#endif // SDL_USE_LIBUDEV
static SDL_bool DeviceExists(const char *path, const char *bus_info) {
SDL_cameralist_item *item;
for (item = SDL_cameralist; item; item = item->next) {
/* found same dev name */
for (SDL_cameralist_item *item = SDL_cameralist; item; item = item->next) {
// found same dev name
if (SDL_strcmp(path, item->fname) == 0) {
return SDL_TRUE;
}
/* found same bus_info */
// found same bus_info
if (SDL_strcmp(bus_info, item->bus_info) == 0) {
return SDL_TRUE;
}
@ -1113,7 +1058,7 @@ static int MaybeAddDevice(const char *path)
fd = open(path, O_RDWR);
if (fd < 0) {
return -2; /* stop iterating /dev/video%d */
return -2; // stop iterating /dev/video%d
}
err = ioctl(fd, VIDIOC_QUERYCAP, &vcap);
close(fd);
@ -1129,7 +1074,7 @@ static int MaybeAddDevice(const char *path)
}
/* Add new item */
// Add new item
item = (SDL_cameralist_item *)SDL_calloc(1, sizeof(SDL_cameralist_item));
if (!item) {
SDL_free(bus_info);
@ -1157,7 +1102,7 @@ static int MaybeAddDevice(const char *path)
++num_cameras;
/* !!! TODO: Send a add event? */
// !!! TODO: Send a add event?
#if DEBUG_CAMERA
SDL_Log("Added video camera ID: %d %s (%s) (total: %d)", item->instance_id, path, bus_info, num_cameras);
#endif
@ -1178,7 +1123,7 @@ static int MaybeRemoveDevice(const char *path)
}
for (item = SDL_cameralist; item; item = item->next) {
/* found it, remove it. */
// found it, remove it.
if (SDL_strcmp(path, item->fname) == 0) {
if (prev) {
prev->next = item->next;
@ -1190,9 +1135,9 @@ static int MaybeRemoveDevice(const char *path)
SDL_cameralist_tail = prev;
}
/* Need to decrement the count */
// Need to decrement the count
--num_cameras;
/* !!! TODO: Send a remove event? */
// !!! TODO: Send a remove event?
SDL_free(item->fname);
SDL_free(item->bus_info);
@ -1203,6 +1148,7 @@ static int MaybeRemoveDevice(const char *path)
}
return 0;
}
#endif /* SDL_USE_LIBUDEV */
#endif // SDL_USE_LIBUDEV
#endif // SDL_CAMERA_V4L2
#endif /* SDL_CAMERA_V4L2 */