#include <errno.h>
#include <stdio.h>
#include <sys/mman.h>
 
#include <spa/param/video/format-utils.h>
 
 
#define WIDTH   640
#define HEIGHT  480
#define BPP    3
 
#include "sdl.h"
 
#define M_PI_M2f (float)(M_PI+M_PI)
 
#define MAX_BUFFERS     64
 
#define DEFAULT_PARAM 0.1
 
struct props {
        double param;
};
 
static void reset_props(struct props *props)
{
        props->param = DEFAULT_PARAM;
}
 
struct data {
        struct props props;
 
        const char *path;
 
        SDL_Renderer *renderer;
        SDL_Window *window;
        SDL_Texture *texture;
 
        struct pw_main_loop *loop;
 
        struct pw_context *context;
 
        struct pw_core *core;
        struct spa_hook core_listener;
 
        struct spa_node impl_node;
        struct spa_hook_list hooks;
        struct spa_io_buffers *io;
        struct spa_io_sequence *io_notify;
        uint32_t io_notify_size;
        float param_accum;
 
 
        struct spa_video_info_raw format;
        int32_t stride;
 
        struct spa_port_info info;
        struct spa_param_info params[5];
 
        struct spa_region region;
 
        struct spa_buffer *buffers[MAX_BUFFERS];
        uint32_t n_buffers;
};
 
static void handle_events(struct data *data)
{
        SDL_Event event;
        while (SDL_PollEvent(&event)) {
                switch (event.type) {
                case SDL_QUIT:
                        break;
                }
        }
}
 
static void update_param(struct data *data)
{
 
        if (data->io_notify == NULL)
                return;
 
 
        data->param_accum += M_PI_M2f / 30.0f;
        if (data->param_accum >= M_PI_M2f)
                data->param_accum -= M_PI_M2f;
}
 
static int impl_send_command(
void *
object, 
const struct spa_command *command)
 
{
        return 0;
}
 
static int impl_add_listener(void *object,
                void *data)
{
        struct data *d = object;
        uint64_t old;
 
 
        old = d->info.change_mask;
        d->info.change_mask = old;
 
 
        return 0;
}
 
static int impl_set_callbacks(void *object,
{
        return 0;
}
 
static int impl_set_io(void *object,
                            uint32_t id, void *data, size_t size)
{
        return 0;
}
 
static int impl_port_set_io(void *object,
                            uint32_t id, void *data, size_t size)
{
        struct data *d = object;
 
        switch (id) {
                d->io = data;
                break;
                d->io_notify = data;
                d->io_notify_size = size;
                break;
        default:
                return -ENOENT;
        }
        return 0;
}
 
static int impl_port_enum_params(
void *
object, 
int seq,
 
                                 uint32_t id, uint32_t start, uint32_t num,
{
        struct data *d = object;
        uint8_t buffer[1024];
        uint32_t count = 0;
 
        result.next = start;
        result.index = result.next++;
 
 
        switch (id) {
        {
                SDL_RendererInfo info;
 
                if (result.index != 0)
                        return 0;
 
                SDL_GetRendererInfo(d->renderer, &info);
                param = sdl_build_formats(&info, &b);
                break;
        }
                if (result.index != 0 || d->format.format == 0)
                        return 0;
                break;
 
                if (result.index != 0)
                        return 0;
 
                break;
 
                switch (result.index) {
                case 0:
                        break;
                case 1:
                        break;
                default:
                        return 0;
                }
                break;
 
                switch (result.index) {
                case 0:
                        break;
                case 1:
                        break;
                default:
                        return 0;
                }
                break;
        default:
                return -ENOENT;
        }
 
 
 
        if (++count != num)
 
        return 0;
}
 
static int port_set_format(void *object,
                           uint32_t flags, 
const struct spa_pod *format)
{
        struct data *d = object;
        Uint32 sdl_format;
        void *dest;
 
        if (format == NULL) {
                SDL_DestroyTexture(d->texture);
                d->texture = NULL;
        } else {
 
 
                sdl_format = id_to_sdl_format(d->format.format);
                if (sdl_format == SDL_PIXELFORMAT_UNKNOWN)
                        return -EINVAL;
                if (d->format.size.width == 0 ||
                    d->format.size.height == 0)
                        return -EINVAL;
 
                d->texture = SDL_CreateTexture(d->renderer,
                                                  sdl_format,
                                                  SDL_TEXTUREACCESS_STREAMING,
                                                  d->format.size.width,
                                                  d->format.size.height);
                SDL_LockTexture(d->texture, NULL, &dest, &d->stride);
                SDL_UnlockTexture(d->texture);
 
        }
        if (format) {
        } else {
        }
 
        d->info.change_mask = 0;
 
        return 0;
}
 
static int impl_port_set_param(void *object,
                               uint32_t id, uint32_t flags,
{
                return port_set_format(object, direction, port_id, flags, param);
        }
        else
                return -ENOENT;
}
 
static int impl_port_use_buffers(void *object,
                uint32_t flags,
{
        struct data *d = object;
        uint32_t i;
 
        if (n_buffers > MAX_BUFFERS)
                return -ENOSPC;
 
        for (i = 0; i < n_buffers; i++)
                d->buffers[i] = buffers[i];
        d->n_buffers = n_buffers;
        return 0;
}
 
static int do_render(
struct spa_loop *loop, 
bool async, uint32_t 
seq,
 
                     const void *_data, size_t size, void *user_data)
{
        struct data *d = user_data;
        uint8_t *map;
        void *sdata, *ddata;
        int sstride, dstride, ostride;
        uint32_t i;
        uint8_t *src, *dst;
 
        handle_events(d);
 
                sdata = map;
                map = NULL;
        } else
                return -EINVAL;
 
        if (SDL_LockTexture(d->texture, NULL, &ddata, &dstride) < 0) {
                fprintf(stderr, "Couldn't lock texture: %s\n", SDL_GetError());
                return -EIO;
        }
 
                                break;
                        if (memcmp(&
r->region, &d->region, 
sizeof(
struct spa_region)) == 0)
 
                                break;
                        fprintf(stderr, "region %dx%d->%dx%d\n",
                                        r->region.position.x, 
r->region.position.y,
 
                                        r->region.size.width, 
r->region.size.height);
 
                }
        }
 
        ostride = 
SPA_MIN(sstride, dstride);
 
        src = sdata;
        dst = ddata;
        for (i = 0; i < d->format.size.height; i++) {
                memcpy(dst, src, ostride);
                src += sstride;
                dst += dstride;
        }
        SDL_UnlockTexture(d->texture);
 
        SDL_RenderClear(d->renderer);
        SDL_RenderCopy(d->renderer, d->texture, NULL, NULL);
        SDL_RenderPresent(d->renderer);
 
        if (map)
 
        return 0;
}
 
static int impl_node_process(void *object)
{
        struct data *d = object;
 
 
        if (d->io->buffer_id >= d->n_buffers)
 
        buf = d->buffers[d->io->buffer_id];
 
                                  false, d)) < 0)
 
        update_param(d);
 
}
 
        .add_listener = impl_add_listener,
        .set_callbacks = impl_set_callbacks,
        .set_io = impl_set_io,
        .send_command = impl_send_command,
        .port_set_io = impl_port_set_io,
        .port_enum_params = impl_port_enum_params,
        .port_set_param = impl_port_set_param,
        .port_use_buffers = impl_port_use_buffers,
        .process = impl_node_process,
};
 
static void make_node(struct data *data)
{
 
        if (data->path)
 
                        &impl_node, data);
                        &props->
dict, &data->impl_node, 0);
}
 
static void set_permissions(struct data *data)
{
 
        
        
 
}
 
static void on_core_error(
void *data, uint32_t 
id, 
int seq, 
int res, 
const char *
message)
 
{
        struct data *d = data;
 
 
}
 
        .error = on_core_error,
};
 
int main(int argc, char *argv[])
{
        struct data data = { 0, };
 
 
        data.path = argc > 1 ? argv[1] : NULL;
 
 
        data.info.flags = 0;
        data.info.params = data.params;
        data.info.n_params = 5;
 
        reset_props(&data.props);
 
        if (SDL_Init(SDL_INIT_VIDEO) < 0) {
                printf("can't initialize SDL: %s\n", SDL_GetError());
                return -1;
        }
 
        if (SDL_CreateWindowAndRenderer
            (WIDTH, HEIGHT, SDL_WINDOW_RESIZABLE, &data.window, &data.renderer)) {
                printf("can't create window: %s\n", SDL_GetError());
                return -1;
        }
 
        if (data.core == NULL) {
                printf("can't connect: %m\n");
                return -1;
        }
 
        set_permissions(&data);
 
        make_node(&data);
 
 
 
        return 0;
}
PW_API_CLIENT_IMPL int pw_client_update_permissions(struct pw_client *object, uint32_t n_permissions, const struct pw_permission *permissions)
Manage the permissions of the global objects for this client.
Definition client.h:214
void pw_context_destroy(struct pw_context *context)
destroy a context object, all resources except the main_loop will be destroyed
Definition context.c:522
struct pw_context * pw_context_new(struct pw_loop *main_loop, struct pw_properties *props, size_t user_data_size)
Make a new context object for a given main_loop.
Definition context.c:310
buffer[1023]
Definition core.h:437
#define PW_ID_CORE
default ID for the core object after connect
Definition core.h:73
struct pw_core * pw_context_connect(struct pw_context *context, struct pw_properties *properties, size_t user_data_size)
Connect to a PipeWire instance.
Definition core.c:410
#define PW_ID_ANY
Definition core.h:77
PW_API_CORE_IMPL int pw_core_add_listener(struct pw_core *object, struct spa_hook *listener, const struct pw_core_events *events, void *data)
Definition core.h:389
uint32_t int seq
Definition core.h:432
struct pw_client * pw_core_get_client(struct pw_core *core)
Get the client proxy of the connected core.
Definition core.c:273
struct pw_proxy * pw_core_export(struct pw_core *core, const char *type, const struct spa_dict *props, void *object, size_t user_data_size)
Export an object into the PipeWire instance associated with core.
Definition core.c:285
uint32_t id
Definition core.h:432
uint32_t int int const char * message
Definition core.h:433
uint32_t int int const char int r
Definition core.h:447
uint32_t int int res
Definition core.h:433
#define PW_VERSION_CORE_EVENTS
Definition core.h:141
#define PW_KEY_MEDIA_TYPE
Media.
Definition keys.h:499
#define PW_KEY_NODE_AUTOCONNECT
node wants to be automatically connected to a compatible node
Definition keys.h:237
#define PW_KEY_TARGET_OBJECT
a target object to link to.
Definition keys.h:566
#define PW_KEY_MEDIA_ROLE
Role: Movie, Music, Camera, Screen, Communication, Game, Notification, DSP, Production,...
Definition keys.h:505
#define PW_KEY_MEDIA_CATEGORY
Media Category: Playback, Capture, Duplex, Monitor, Manager.
Definition keys.h:502
#define PW_KEY_MEDIA_CLASS
class Ex: "Video/Source"
Definition keys.h:510
#define pw_log_error(...)
Definition log.h:178
PW_API_LOOP_IMPL int pw_loop_invoke(struct pw_loop *object, spa_invoke_func_t func, uint32_t seq, const void *data, size_t size, bool block, void *user_data)
Definition loop.h:66
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
#define PW_PERM_X
methods can be called on the object.
Definition permission.h:36
#define PW_PERM_R
object can be seen and events can be received
Definition permission.h:32
#define PW_PERMISSION_INIT(id, p)
Definition permission.h:75
void pw_init(int *argc, char **argv[])
Initialize PipeWire.
Definition pipewire.c:488
void pw_properties_free(struct pw_properties *properties)
Free a properties object.
Definition properties.c:558
struct pw_properties * pw_properties_new(const char *key,...)
Make a new properties object.
Definition properties.c:97
int pw_properties_set(struct pw_properties *properties, const char *key, const char *value)
Set a property value.
Definition properties.c:585
SPA_API_BUFFER struct spa_meta * spa_buffer_find_meta(const struct spa_buffer *b, uint32_t type)
Find metadata in a buffer.
Definition buffer.h:118
#define spa_meta_for_each(pos, meta)
iterate all the items in a metadata
Definition meta.h:108
SPA_API_META bool spa_meta_region_is_valid(const struct spa_meta_region *m)
Definition meta.h:103
@ SPA_META_VideoDamage
array of struct spa_meta_region with damage, where an invalid entry or end-of-array marks the end.
Definition meta.h:39
@ SPA_META_Header
struct spa_meta_header
Definition meta.h:37
@ SPA_DATA_MemFd
memfd, mmap to get to memory.
Definition buffer.h:45
@ SPA_DATA_MemPtr
pointer to memory, the data field in struct spa_data is set.
Definition buffer.h:43
@ SPA_DATA_DmaBuf
fd to dmabuf memory.
Definition buffer.h:46
@ SPA_CONTROL_Properties
SPA_TYPE_OBJECT_Props.
Definition control.h:32
SPA_API_DEBUG_FORMAT int spa_debug_format(int indent, const struct spa_type_info *info, const struct spa_pod *format)
Definition format.h:217
SPA_API_HOOK void spa_hook_list_isolate(struct spa_hook_list *list, struct spa_hook_list *save, struct spa_hook *hook, const void *funcs, void *data)
Definition hook.h:485
SPA_API_HOOK void spa_hook_list_join(struct spa_hook_list *list, struct spa_hook_list *save)
Definition hook.h:499
SPA_API_HOOK void spa_hook_list_init(struct spa_hook_list *list)
Initialize a hook list to the empty list.
Definition hook.h:437
#define SPA_INTERFACE_INIT(_type, _version, _funcs, _data)
Initialize a spa_interface.
Definition hook.h:167
#define SPA_PORT_CHANGE_MASK_FLAGS
Definition node.h:105
#define spa_node_emit_port_info(hooks,...)
Definition utils.h:128
#define SPA_PORT_INFO_INIT()
Definition node.h:149
#define SPA_STATUS_HAVE_DATA
Definition io.h:86
#define SPA_TYPE_INTERFACE_Node
Definition node.h:47
#define SPA_STATUS_NEED_DATA
Definition io.h:84
#define SPA_VERSION_NODE
Definition node.h:50
#define SPA_PORT_CHANGE_MASK_PARAMS
Definition node.h:111
#define SPA_RESULT_TYPE_NODE_PARAMS
Definition node.h:154
#define spa_node_emit_result(hooks,...)
Definition utils.h:129
#define SPA_VERSION_NODE_METHODS
Definition node.h:341
@ SPA_IO_Notify
area for notify messages, struct spa_io_sequence
Definition io.h:44
@ SPA_IO_Buffers
area to exchange buffers, struct spa_io_buffers
Definition io.h:38
#define SPA_PARAM_INFO_WRITE
Definition param.h:59
#define SPA_PARAM_INFO_READ
Definition param.h:57
#define SPA_PARAM_INFO_READWRITE
Definition param.h:61
SPA_API_VIDEO_RAW_UTILS int spa_format_video_raw_parse(const struct spa_pod *format, struct spa_video_info_raw *info)
Definition raw-utils.h:37
#define SPA_PARAM_INFO(id, flags)
Definition param.h:71
SPA_API_VIDEO_RAW_UTILS struct spa_pod * spa_format_video_raw_build(struct spa_pod_builder *builder, uint32_t id, const struct spa_video_info_raw *info)
Definition raw-utils.h:68
@ SPA_PROP_contrast
Definition props.h:106
@ SPA_PARAM_META_size
the expected maximum size the meta (Int)
Definition buffers.h:40
@ SPA_PARAM_META_type
the metadata, one of enum spa_meta_type (Id enum spa_meta_type)
Definition buffers.h:39
@ SPA_PARAM_Format
configured format as SPA_TYPE_OBJECT_Format
Definition param.h:34
@ SPA_PARAM_Meta
allowed metadata for buffers as SPA_TYPE_OBJECT_ParamMeta
Definition param.h:36
@ SPA_PARAM_IO
configurable IO areas as SPA_TYPE_OBJECT_ParamIO
Definition param.h:37
@ SPA_PARAM_EnumFormat
available formats as SPA_TYPE_OBJECT_Format
Definition param.h:33
@ SPA_PARAM_Buffers
buffer configurations as SPA_TYPE_OBJECT_ParamBuffers
Definition param.h:35
@ SPA_PARAM_IO_id
type ID, uniquely identifies the io area (Id enum spa_io_type)
Definition buffers.h:46
@ SPA_PARAM_IO_size
size of the io area (Int)
Definition buffers.h:47
@ SPA_PARAM_BUFFERS_size
size of a data block memory (Int)
Definition buffers.h:29
@ SPA_PARAM_BUFFERS_stride
stride of data block memory (Int)
Definition buffers.h:30
@ SPA_PARAM_BUFFERS_blocks
number of data blocks per buffer (Int)
Definition buffers.h:28
@ SPA_PARAM_BUFFERS_buffers
number of buffers (Int)
Definition buffers.h:27
SPA_API_POD_BUILDER void * spa_pod_builder_pop(struct spa_pod_builder *builder, struct spa_pod_frame *frame)
Definition builder.h:187
#define SPA_POD_CHOICE_RANGE_Int(def, min, max)
Definition vararg.h:58
SPA_API_POD_BUILDER int spa_pod_builder_control(struct spa_pod_builder *builder, uint32_t offset, uint32_t type)
Definition builder.h:515
#define SPA_POD_Id(val)
Definition vararg.h:49
SPA_API_POD_BUILDER int spa_pod_builder_push_object(struct spa_pod_builder *builder, struct spa_pod_frame *frame, uint32_t type, uint32_t id)
Definition builder.h:479
SPA_API_POD_FILTER int spa_pod_filter(struct spa_pod_builder *b, struct spa_pod **result, const struct spa_pod *pod, const struct spa_pod *filter)
Definition filter.h:445
SPA_API_POD_BUILDER void spa_pod_builder_init(struct spa_pod_builder *builder, void *data, uint32_t size)
Definition builder.h:97
#define spa_pod_builder_add_object(b, type, id,...)
Definition builder.h:703
SPA_API_POD_BUILDER int spa_pod_builder_float(struct spa_pod_builder *builder, float val)
Definition builder.h:284
SPA_API_POD_BUILDER int spa_pod_builder_push_sequence(struct spa_pod_builder *builder, struct spa_pod_frame *frame, uint32_t unit)
Definition builder.h:504
#define SPA_POD_Int(val)
Definition vararg.h:54
SPA_API_POD_BUILDER int spa_pod_builder_prop(struct spa_pod_builder *builder, uint32_t key, uint32_t flags)
Definition builder.h:494
SPA_API_RESULT const char * spa_strerror(int err)
Definition result.h:61
@ SPA_TYPE_OBJECT_ParamBuffers
Definition type.h:88
@ SPA_TYPE_OBJECT_ParamIO
Definition type.h:90
@ SPA_TYPE_OBJECT_Props
Definition type.h:86
@ SPA_TYPE_OBJECT_ParamMeta
Definition type.h:89
#define SPA_MIN(a, b)
Definition defs.h:165
#define spa_zero(x)
Definition defs.h:508
#define SPA_ID_INVALID
Definition defs.h:250
spa_direction
Definition defs.h:106
@ SPA_DIRECTION_INPUT
Definition defs.h:107
Core events.
Definition core.h:139
Definition permission.h:69
uint32_t permissions
bitmask of above permissions
Definition permission.h:71
Definition properties.h:39
struct spa_dict dict
dictionary of key/values
Definition properties.h:40
A Buffer.
Definition buffer.h:110
struct spa_data * datas
array of data members
Definition buffer.h:114
int32_t stride
stride of valid data
Definition buffer.h:65
struct spa_chunk * chunk
valid chunk of memory
Definition buffer.h:106
int64_t fd
optional fd for data
Definition buffer.h:102
uint32_t mapoffset
offset to map fd at, this is page aligned
Definition buffer.h:103
void * data
optional data pointer
Definition buffer.h:105
uint32_t maxsize
max size of data
Definition buffer.h:104
uint32_t type
memory type, one of enum spa_data_type, when allocating memory, the type contains a bitmask of allowe...
Definition buffer.h:79
A list of hooks.
Definition hook.h:416
A hook, contains the structure with functions and the data passed to the functions.
Definition hook.h:427
IO area to exchange buffers.
Definition io.h:80
control stream, io area for SPA_IO_Control and SPA_IO_Notify
Definition io.h:200
Node callbacks.
Definition node.h:242
events from the spa_node.
Definition node.h:186
Node methods.
Definition node.h:337
the result of enum_params or port_enum_params.
Definition node.h:162
uint32_t next
next index of iteration
Definition node.h:165
uint32_t id
id of parameter
Definition node.h:163