From 7a46c07230b8d8108c0e8e80df4522d0ac116538 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:28:17 +0200 Subject: Adding upstream version 0.3.65. Signed-off-by: Daniel Baumann --- src/examples/video-dsp-play.c | 315 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 315 insertions(+) create mode 100644 src/examples/video-dsp-play.c (limited to 'src/examples/video-dsp-play.c') diff --git a/src/examples/video-dsp-play.c b/src/examples/video-dsp-play.c new file mode 100644 index 0000000..6068e2a --- /dev/null +++ b/src/examples/video-dsp-play.c @@ -0,0 +1,315 @@ +/* PipeWire + * + * Copyright © 2019 Wim Taymans + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +/* + [title] + Video input stream using \ref pw_filter "pw_filter". + [title] + */ + +#include +#include +#include + +#include +#include +#include + +#include +#include + +#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; + + struct pw_main_loop *loop; + + struct pw_filter *filter; + struct spa_hook filter_listener; + + void *in_port; + + struct spa_io_position *position; + struct spa_video_info_dsp format; + + 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: + pw_main_loop_quit(data->loop); + break; + } + } +} + +/* our data processing function is in general: + * + * struct pw_buffer *b; + * b = pw_filter_dequeue_buffer(port); + * + * .. do stuff with buffer ... + * + * pw_filter_queue_buffer(port, b); + */ +static void +on_process(void *_data, struct spa_io_position *position) +{ + struct data *data = _data; + struct pw_buffer *b; + struct spa_buffer *buf; + void *sdata, *ddata; + int sstride, dstride; + uint32_t i, j; + uint8_t *src, *dst; + + b = NULL; + while (true) { + struct pw_buffer *t; + if ((t = pw_filter_dequeue_buffer(data->in_port)) == NULL) + break; + if (b) + pw_filter_queue_buffer(data->in_port, b); + b = t; + } + if (b == NULL) { + pw_log_warn("out of buffers: %m"); + return; + } + + buf = b->buffer; + + pw_log_trace("new buffer %p %dx%d", buf, + data->position->video.size.width, data->position->video.size.height); + + handle_events(data); + + if ((sdata = buf->datas[0].data) == NULL) { + pw_log_error("no buffer data"); + goto done; + } + + if (SDL_LockTexture(data->texture, NULL, &ddata, &dstride) < 0) { + pw_log_error("Couldn't lock texture: %s", SDL_GetError()); + goto done; + } + + /* copy video image in texture */ + sstride = buf->datas[0].chunk->stride; + 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(p[j].r * 255.0f, 0, 255); + dst[j * 4 + 1] = SPA_CLAMP(p[j].g * 255.0f, 0, 255); + dst[j * 4 + 2] = SPA_CLAMP(p[j].b * 255.0f, 0, 255); + dst[j * 4 + 3] = SPA_CLAMP(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: + pw_filter_queue_buffer(data->in_port, b); +} + +static void on_filter_state_changed(void *_data, enum pw_filter_state old, + enum pw_filter_state state, const char *error) +{ + struct data *data = _data; + fprintf(stderr, "filter state: \"%s\"\n", pw_filter_state_as_string(state)); + switch (state) { + case PW_FILTER_STATE_UNCONNECTED: + pw_main_loop_quit(data->loop); + 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) { + case SPA_IO_Position: + 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; + struct pw_filter *filter = data->filter; + + /* NULL means to clear the format */ + if (param == NULL || id != SPA_PARAM_Format) + return; + + /* call a helper function to parse the format for us. */ + spa_format_video_dsp_parse(param, &data->format); + + if (data->format.format != SPA_VIDEO_FORMAT_RGBA_F32) { + pw_filter_set_error(filter, -EINVAL, "unknown format"); + 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) { + pw_filter_set_error(filter, -errno, "can't create texture"); + 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; +} + +/* these are the filter events we listen for */ +static const struct pw_filter_events filter_events = { + PW_VERSION_FILTER_EVENTS, + .state_changed = on_filter_state_changed, + .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, }; + + pw_init(&argc, &argv); + + /* create a main loop */ + data.loop = pw_main_loop_new(NULL); + + data.target = argc > 1 ? argv[1] : NULL; + + /* create a simple filter, the simple filter manages to core and remote + * objects for you if you don't need to deal with them + * + * If you plan to autoconnect your filter, you need to provide at least + * media, category and role properties + * + * Pass your events and a user_data pointer as the last arguments. This + * will inform you about the filter state. The most important event + * you need to listen to is the process event where you need to consume + * the data provided to you. + */ + data.filter = pw_filter_new_simple( + pw_main_loop_get_loop(data.loop), + "video-dsp-play", + pw_properties_new( + PW_KEY_MEDIA_TYPE, "Video", + PW_KEY_MEDIA_CATEGORY, "Capture", + PW_KEY_MEDIA_ROLE, "DSP", + PW_KEY_NODE_AUTOCONNECT, data.target ? "true" : "false", + PW_KEY_TARGET_OBJECT, data.target, + PW_KEY_MEDIA_CLASS, "Stream/Input/Video", + 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; + } + + /* Make a new DSP port. This will automatically set up the right + * parameters for the port */ + data.in_port = pw_filter_add_port(data.filter, + PW_DIRECTION_INPUT, + PW_FILTER_PORT_FLAG_MAP_BUFFERS, + 0, + pw_properties_new( + PW_KEY_FORMAT_DSP, "32 bit float RGBA video", + PW_KEY_PORT_NAME, "input", + NULL), + NULL, 0); + + pw_filter_connect(data.filter, + 0, /* no flags */ + NULL, 0); + + /* do things until we quit the mainloop */ + pw_main_loop_run(data.loop); + + pw_filter_destroy(data.filter); + pw_main_loop_destroy(data.loop); + + SDL_DestroyTexture(data.texture); + if (data.cursor) + SDL_DestroyTexture(data.cursor); + SDL_DestroyRenderer(data.renderer); + SDL_DestroyWindow(data.window); + + return 0; +} -- cgit v1.2.3