#include <stdio.h>
#include <unistd.h>
#include <sys/mman.h>
#include <spa/param/video/format-utils.h>
#define WIDTH 640
#define HEIGHT 480
#define BPP 3
#define MAX_BUFFERS 64
#include "sdl.h"
struct pixel {
float r, g, b, a;
};
struct data {
const char *target;
SDL_Renderer *renderer;
SDL_Window *window;
SDL_Texture *texture;
SDL_Texture *cursor;
void *in_port;
int counter;
SDL_Rect rect;
SDL_Rect cursor_rect;
};
static void handle_events(struct data *data)
{
SDL_Event event;
while (SDL_PollEvent(&event)) {
switch (event.type) {
case SDL_QUIT:
break;
}
}
}
static void
{
struct data *data = _data;
void *sdata, *ddata;
int sstride, dstride;
uint32_t i, j;
uint8_t *src, *dst;
b = NULL;
while (true) {
break;
if (b)
b = t;
}
if (b == NULL) {
return;
}
data->position->video.size.width, data->position->video.size.height);
handle_events(data);
goto done;
}
if (SDL_LockTexture(data->texture, NULL, &ddata, &dstride) < 0) {
goto done;
}
if (sstride == 0)
sstride = buf->
datas[0].
chunk->
size / data->position->video.size.height;
src = sdata;
dst = ddata;
for (i = 0; i < data->position->video.size.height; i++) {
struct pixel *p = (struct pixel *) src;
for (j = 0; j < data->position->video.size.width; j++) {
dst[j * 4 + 0] =
SPA_CLAMP((uint8_t)(p[j].r * 255.0f), 0, 255);
dst[j * 4 + 1] =
SPA_CLAMP((uint8_t)(p[j].g * 255.0f), 0, 255);
dst[j * 4 + 2] =
SPA_CLAMP((uint8_t)(p[j].b * 255.0f), 0, 255);
dst[j * 4 + 3] =
SPA_CLAMP((uint8_t)(p[j].a * 255.0f), 0, 255);
}
src += sstride;
dst += dstride;
}
SDL_UnlockTexture(data->texture);
SDL_RenderClear(data->renderer);
SDL_RenderCopy(data->renderer, data->texture, &data->rect, NULL);
SDL_RenderPresent(data->renderer);
done:
}
{
struct data *data = _data;
switch (state) {
break;
default:
break;
}
}
static void
on_filter_io_changed(void *_data, void *port_data, uint32_t id, void *area, uint32_t size)
{
struct data *data = _data;
switch (id) {
data->position = area;
break;
}
}
static void
on_filter_param_changed(
void *_data,
void *port_data, uint32_t
id,
const struct spa_pod *param)
{
struct data *data = _data;
return;
return;
}
data->texture = SDL_CreateTexture(data->renderer,
SDL_PIXELFORMAT_RGBA32,
SDL_TEXTUREACCESS_STREAMING,
data->position->video.size.width,
data->position->video.size.height);
if (data->texture == NULL) {
return;
}
data->rect.x = 0;
data->rect.y = 0;
data->rect.w = data->position->video.size.width;
data->rect.h = data->position->video.size.height;
}
.io_changed = on_filter_io_changed,
.param_changed = on_filter_param_changed,
.process = on_process,
};
int main(int argc, char *argv[])
{
struct data data = { 0, };
data.target = argc > 1 ? argv[1] : NULL;
"video-dsp-play",
NULL),
&filter_events,
&data);
if (SDL_Init(SDL_INIT_VIDEO) < 0) {
fprintf(stderr, "can't initialize SDL: %s\n", SDL_GetError());
return -1;
}
if (SDL_CreateWindowAndRenderer
(WIDTH, HEIGHT, SDL_WINDOW_RESIZABLE, &data.window, &data.renderer)) {
fprintf(stderr, "can't create window: %s\n", SDL_GetError());
return -1;
}
0,
NULL),
NULL, 0);
0,
NULL, 0);
SDL_DestroyTexture(data.texture);
if (data.cursor)
SDL_DestroyTexture(data.cursor);
SDL_DestroyRenderer(data.renderer);
SDL_DestroyWindow(data.window);
return 0;
}
const char * pw_filter_state_as_string(enum pw_filter_state state)
Convert a filter state to a readable string
Definition filter.c:1326
int pw_filter_connect(struct pw_filter *filter, enum pw_filter_flags flags, const struct spa_pod **params, uint32_t n_params)
Connect a filter for processing.
Definition filter.c:1548
int pw_filter_queue_buffer(void *port_data, struct pw_buffer *buffer)
Submit a buffer for playback or recycle a buffer for capture.
Definition filter.c:1994
pw_filter_state
The state of a filter
Definition filter.h:42
void * pw_filter_add_port(struct pw_filter *filter, enum pw_direction direction, enum pw_filter_port_flags flags, size_t port_data_size, struct pw_properties *props, const struct spa_pod **params, uint32_t n_params)
add a port to the filter, returns user data of port_data_size.
Definition filter.c:1780
#define PW_VERSION_FILTER_EVENTS
Definition filter.h:66
struct pw_buffer * pw_filter_dequeue_buffer(void *port_data)
Get a buffer that can be filled for output ports or consumed for input ports.
Definition filter.c:1976
int pw_filter_set_error(struct pw_filter *filter, int res, const char *error,...)
Set the filter in error state.
Definition filter.c:1866
void pw_filter_destroy(struct pw_filter *filter)
Destroy a filter
Definition filter.c:1385
struct pw_filter * pw_filter_new_simple(struct pw_loop *loop, const char *name, struct pw_properties *props, const struct pw_filter_events *events, void *data)
Definition filter.c:1281
@ PW_FILTER_PORT_FLAG_MAP_BUFFERS
mmap the buffers except DmaBuf that is not explicitly marked as mappable.
Definition filter.h:129
@ PW_FILTER_STATE_UNCONNECTED
unconnected
Definition filter.h:44
#define PW_KEY_PORT_NAME
port name
Definition keys.h:335
#define PW_KEY_MEDIA_TYPE
Media.
Definition keys.h:497
#define PW_KEY_NODE_AUTOCONNECT
node wants to be automatically connected to a compatible node
Definition keys.h:235
#define PW_KEY_TARGET_OBJECT
a target object to link to.
Definition keys.h:564
#define PW_KEY_MEDIA_ROLE
Role: Movie, Music, Camera, Screen, Communication, Game, Notification, DSP, Production,...
Definition keys.h:503
#define PW_KEY_MEDIA_CATEGORY
Media Category: Playback, Capture, Duplex, Monitor, Manager.
Definition keys.h:500
#define PW_KEY_FORMAT_DSP
format related properties
Definition keys.h:540
#define PW_KEY_MEDIA_CLASS
class Ex: "Video/Source"
Definition keys.h:508
#define pw_log_trace(...)
Definition log.h:182
#define pw_log_warn(...)
Definition log.h:179
#define pw_log_error(...)
Definition log.h:178
int pw_main_loop_quit(struct pw_main_loop *loop)
Quit a main loop.
Definition main-loop.c:108
void pw_main_loop_destroy(struct pw_main_loop *loop)
Destroy a loop.
Definition main-loop.c:73
int pw_main_loop_run(struct pw_main_loop *loop)
Run a main loop.
Definition main-loop.c:122
struct pw_main_loop * pw_main_loop_new(const struct spa_dict *props)
Create a new main loop.
Definition main-loop.c:63
struct pw_loop * pw_main_loop_get_loop(struct pw_main_loop *loop)
Get the loop implementation.
Definition main-loop.c:96
void pw_init(int *argc, char **argv[])
Initialize PipeWire.
Definition pipewire.c:488
#define PW_DIRECTION_INPUT
Definition port.h:48
struct pw_properties * pw_properties_new(const char *key,...)
Make a new properties object.
Definition properties.c:96
@ SPA_IO_Position
position information in the graph, struct spa_io_position
Definition io.h:45
static int spa_format_video_dsp_parse(const struct spa_pod *format, struct spa_video_info_dsp *info)
Definition dsp-utils.h:27
@ SPA_PARAM_Format
configured format as SPA_TYPE_OBJECT_Format
Definition param.h:34
@ SPA_VIDEO_FORMAT_RGBA_F32
Definition raw.h:125
#define SPA_CLAMP(v, low, high)
Definition defs.h:177
a buffer structure obtained from pw_stream_dequeue_buffer().
Definition stream.h:212
struct spa_buffer * buffer
the spa buffer
Definition stream.h:213
Events for a filter.
Definition filter.h:64
void(* state_changed)(void *data, enum pw_filter_state old, enum pw_filter_state state, const char *error)
when the filter state changes
Definition filter.h:71
A Buffer.
Definition buffer.h:100
struct spa_data * datas
array of data members
Definition buffer.h:104
int32_t stride
stride of valid data
Definition buffer.h:55
uint32_t size
size of valid data.
Definition buffer.h:53
struct spa_chunk * chunk
valid chunk of memory
Definition buffer.h:96
void * data
optional data pointer
Definition buffer.h:95
A hook, contains the structure with functions and the data passed to the functions.
Definition hook.h:350
The position information adds extra meaning to the raw clock times.
Definition io.h:314