#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <dlfcn.h>
#include <poll.h>
#include <pthread.h>
#include <errno.h>
#include <sys/mman.h>
#include <SDL2/SDL.h>
#define MAX_BUFFERS 8
struct buffer {
SDL_Texture *texture;
};
struct data {
const char *plugin_dir;
uint32_t n_support;
SDL_Renderer *renderer;
SDL_Window *window;
SDL_Texture *texture;
bool use_buffer;
bool running;
pthread_t thread;
struct buffer buffers[MAX_BUFFERS];
unsigned int n_buffers;
};
static int load_handle(
struct data *data,
struct spa_handle **handle,
const char *lib,
const char *name)
{
int res;
void *hnd;
uint32_t i;
char *path = NULL;
if ((path =
spa_aprintf(
"%s/%s", data->plugin_dir, lib)) == NULL) {
return -ENOMEM;
}
if ((hnd = dlopen(path, RTLD_NOW)) == NULL) {
printf("can't load %s: %s\n", path, dlerror());
free(path);
return -ENOENT;
}
free(path);
printf("can't find enum function\n");
return -ENOENT;
}
for (i = 0;;) {
if ((res = enum_func(&factory, &i)) <= 0) {
if (res != 0)
printf(
"can't enumerate factories: %s\n",
spa_strerror(res));
break;
}
continue;
continue;
NULL, data->support,
data->n_support)) < 0) {
printf("can't make factory instance: %d\n", res);
return res;
}
return 0;
}
return -EBADF;
}
static int make_node(
struct data *data,
struct spa_node **node,
const char *lib,
const char *name)
{
void *iface;
int res;
if ((res = load_handle(data, &handle, lib, name)) < 0)
return res;
printf("can't get interface %d\n", res);
return res;
}
*node = iface;
return 0;
}
static int on_source_ready(void *_data, int status)
{
struct data *data = _data;
int res;
struct buffer *b;
void *sdata, *ddata;
int sstride, dstride;
int i;
uint8_t *src, *dst;
return -EINVAL;
datas = b->buffer.datas;
if (b->texture) {
SDL_Texture *texture = b->texture;
SDL_UnlockTexture(texture);
SDL_RenderClear(data->renderer);
SDL_RenderCopy(data->renderer, texture, NULL, NULL);
SDL_RenderPresent(data->renderer);
if (SDL_LockTexture(texture, NULL, &sdata, &sstride) < 0) {
fprintf(stderr, "Couldn't lock texture: %s\n", SDL_GetError());
return -EIO;
}
} else {
uint8_t *map;
if (SDL_LockTexture(data->texture, NULL, &ddata, &dstride) < 0) {
fprintf(stderr, "Couldn't lock texture: %s\n", SDL_GetError());
return -EIO;
}
map = mmap(NULL, datas[0].maxsize + datas[0].mapoffset, PROT_READ,
MAP_PRIVATE, datas[0].fd, 0);
if (map == MAP_FAILED)
return -errno;
sdata =
SPA_PTROFF(map, datas[0].mapoffset, uint8_t);
map = NULL;
} else
return -EIO;
for (i = 0; i < 240; i++) {
src = ((uint8_t *) sdata + i * sstride);
dst = ((uint8_t *) ddata + i * dstride);
memcpy(dst, src,
SPA_MIN(sstride, dstride));
}
SDL_UnlockTexture(data->texture);
SDL_RenderClear(data->renderer);
SDL_RenderCopy(data->renderer, data->texture, NULL, NULL);
SDL_RenderPresent(data->renderer);
if (map)
munmap(map, datas[0].maxsize + datas[0].mapoffset);
}
printf("got process error %d\n", res);
return 0;
}
.ready = on_source_ready,
};
static int make_nodes(struct data *data, const char *device)
{
int res;
uint8_t buffer[256];
uint32_t index;
if ((res =
"v4l2/libspa-v4l2.so",
printf("can't create v4l2-source: %d\n", res);
return res;
}
index = 0;
&index, NULL, &props, &b)) == 1) {
}
printf("got set_props error %d\n", res);
return res;
}
static int setup_buffers(
struct data *
data)
{
int i;
for (i = 0; i < MAX_BUFFERS; i++) {
struct buffer *b = &data->buffers[i];
data->bp[i] = &b->buffer;
b->texture = NULL;
b->buffer.metas = b->metas;
b->buffer.n_metas = 1;
b->buffer.datas = b->datas;
b->buffer.n_datas = 1;
b->header.flags = 0;
b->header.seq = 0;
b->header.pts = 0;
b->header.dts_offset = 0;
b->metas[0].data = &b->header;
b->metas[0].size = sizeof(b->header);
b->datas[0].type = 0;
b->datas[0].flags = 0;
b->datas[0].fd = -1;
b->datas[0].mapoffset = 0;
b->datas[0].maxsize = 0;
b->datas[0].data = NULL;
b->datas[0].chunk = &b->chunks[0];
b->datas[0].chunk->offset = 0;
b->datas[0].chunk->size = 0;
b->datas[0].chunk->stride = 0;
}
data->n_buffers = MAX_BUFFERS;
return 0;
}
static int sdl_alloc_buffers(struct data *data)
{
int i;
for (i = 0; i < MAX_BUFFERS; i++) {
struct buffer *b = &data->buffers[i];
SDL_Texture *texture;
void *ptr;
int stride;
texture = SDL_CreateTexture(data->renderer,
SDL_PIXELFORMAT_YUY2,
SDL_TEXTUREACCESS_STREAMING, 320, 240);
if (!texture) {
printf("can't create texture: %s\n", SDL_GetError());
return -ENOMEM;
}
if (SDL_LockTexture(texture, NULL, &ptr, &stride) < 0) {
fprintf(stderr, "Couldn't lock texture: %s\n", SDL_GetError());
return -EIO;
}
b->texture = texture;
b->datas[0].maxsize = stride * 240;
b->datas[0].data = ptr;
b->datas[0].chunk->offset = 0;
b->datas[0].chunk->size = stride * 240;
b->datas[0].chunk->stride = stride;
}
return 0;
}
static int negotiate_formats(struct data *data)
{
int res;
uint8_t buffer[256];
if ((res =
&
data->source_output[0],
sizeof(
data->source_output[0]))) < 0)
return res;
format)) < 0)
return res;
if ((res = sdl_alloc_buffers(
data)) < 0)
return res;
return -1;
}
} else {
unsigned int n_buffers;
data->texture = SDL_CreateTexture(
data->renderer,
SDL_PIXELFORMAT_YUY2,
SDL_TEXTUREACCESS_STREAMING, 320, 240);
printf("can't create texture: %s\n", SDL_GetError());
return -1;
}
n_buffers = MAX_BUFFERS;
data->bp, n_buffers)) < 0) {
return -1;
}
data->n_buffers = n_buffers;
}
return 0;
}
static void *loop(void *user_data)
{
struct data *data = user_data;
printf("enter thread\n");
while (data->running) {
}
printf("leave thread\n");
return NULL;
}
static void run_async_source(struct data *data)
{
int res, err;
SDL_Event event;
bool running = true;
printf("got error %d\n", res);
data->running = true;
if ((err = pthread_create(&data->thread, NULL, loop, data)) != 0) {
printf("can't create thread: %d %s", err, strerror(err));
data->running = false;
}
while (running && SDL_WaitEvent(&event)) {
switch (event.type) {
case SDL_QUIT:
running = false;
break;
}
}
if (data->running) {
data->running = false;
pthread_join(data->thread, NULL);
}
printf("got error %d\n", res);
}
int main(int argc, char *argv[])
{
struct data data = { 0 };
int res;
const char *str;
void *iface;
if ((str = getenv("SPA_PLUGIN_DIR")) == NULL)
str = PLUGINDIR;
data.plugin_dir = str;
if ((res = load_handle(&data, &handle,
"support/libspa-support.so",
return res;
printf("can't get System interface %d\n", res);
return res;
}
data.system = iface;
if ((res = load_handle(&data, &handle,
"support/libspa-support.so",
return res;
printf("can't get interface %d\n", res);
return res;
}
data.loop = iface;
printf("can't get interface %d\n", res);
return res;
}
data.control = iface;
data.use_buffer = true;
data.log = &default_log.log;
if ((str = getenv("SPA_DEBUG")))
data.log->level = atoi(str);
if (SDL_Init(SDL_INIT_VIDEO) < 0) {
printf("can't initialize SDL: %s\n", SDL_GetError());
return -1;
}
if (SDL_CreateWindowAndRenderer
(320, 240, SDL_WINDOW_RESIZABLE, &data.window, &data.renderer)) {
printf("can't create window: %s\n", SDL_GetError());
return -1;
}
if ((res = make_nodes(&data, argv[1])) < 0) {
printf("can't make nodes: %d\n", res);
return -1;
}
if ((res = negotiate_formats(&data)) < 0) {
printf("can't negotiate nodes: %d\n", res);
return -1;
}
run_async_source(&data);
SDL_DestroyRenderer(data.renderer);
return 0;
}