mirror of
https://gitlab.freedesktop.org/pipewire/pipewire
synced 2024-09-06 08:45:44 +00:00
examples: Add video-dsp-src example
This client creates the same output as video-src in the dsp format.
This commit is contained in:
parent
ad6e2ce480
commit
d0e51dd066
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@ -7,6 +7,7 @@ examples = [
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'video-play',
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'video-src',
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'video-dsp-play',
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'video-dsp-src',
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'video-play-pull',
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'video-play-reneg',
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'video-src-alloc',
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376
src/examples/video-dsp-src.c
Normal file
376
src/examples/video-dsp-src.c
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@ -0,0 +1,376 @@
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/* PipeWire */
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/* SPDX-FileCopyrightText: Copyright © 2018 Wim Taymans */
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/* SPDX-FileCopyrightText: Copyright © 2023 Columbarius */
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/* SPDX-License-Identifier: MIT */
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/*
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[title]
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Video source using \ref pw_stream.
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[title]
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*/
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#include <stdio.h>
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#include <errno.h>
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#include <signal.h>
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#include <math.h>
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#include <spa/param/video/format-utils.h>
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#include <spa/param/tag-utils.h>
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#include <spa/debug/pod.h>
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#include <pipewire/pipewire.h>
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#define BPP 16
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#define CURSOR_WIDTH 64
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#define CURSOR_HEIGHT 64
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#define CURSOR_BPP 4
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#define MAX_BUFFERS 64
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#define M_PI_M2 ( M_PI + M_PI )
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struct pixel {
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float r, g, b, a;
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};
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struct data {
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struct pw_main_loop *loop;
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struct spa_source *timer;
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struct pw_context *context;
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struct pw_core *core;
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struct pw_stream *stream;
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struct spa_hook stream_listener;
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struct spa_video_info_dsp format;
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int32_t stride;
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struct spa_io_position *position;
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int counter;
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uint32_t seq;
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double crop;
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double accumulator;
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int res;
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};
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static void draw_elipse(uint32_t *dst, int width, int height, uint32_t color)
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{
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int i, j, r1, r2, r12, r22, r122;
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r1 = width/2;
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r12 = r1 * r1;
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r2 = height/2;
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r22 = r2 * r2;
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r122 = r12 * r22;
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for (i = -r2; i < r2; i++) {
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for (j = -r1; j < r1; j++) {
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dst[(i + r2)*width+(j+r1)] =
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(i * i * r12 + j * j * r22 <= r122) ? color : 0x00000000;
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}
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}
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}
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static inline float map_value(int value)
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{
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return (value%256)/255.0f;
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}
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static void on_process(void *userdata)
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{
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struct data *data = userdata;
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struct pw_buffer *b;
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struct spa_buffer *buf;
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uint32_t i, j;
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uint8_t *p;
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struct pixel *px;
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struct spa_meta *m;
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struct spa_meta_header *h;
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struct spa_meta_region *mc;
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struct spa_meta_cursor *mcs;
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if ((b = pw_stream_dequeue_buffer(data->stream)) == NULL) {
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pw_log_warn("out of buffers: %m");
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return;
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}
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buf = b->buffer;
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if ((p = buf->datas[0].data) == NULL)
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return;
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if ((h = spa_buffer_find_meta_data(buf, SPA_META_Header, sizeof(*h)))) {
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#if 0
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struct timespec now;
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clock_gettime(CLOCK_MONOTONIC, &now);
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h->pts = SPA_TIMESPEC_TO_NSEC(&now);
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#else
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h->pts = -1;
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#endif
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h->flags = 0;
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h->seq = data->seq++;
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h->dts_offset = 0;
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}
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if ((m = spa_buffer_find_meta(buf, SPA_META_VideoDamage))) {
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struct spa_meta_region *r = spa_meta_first(m);
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if (spa_meta_check(r, m)) {
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r->region.position = SPA_POINT(0,0);
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r->region.size = data->position->video.size;
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r++;
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}
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if (spa_meta_check(r, m))
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r->region = SPA_REGION(0,0,0,0);
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}
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if ((mc = spa_buffer_find_meta_data(buf, SPA_META_VideoCrop, sizeof(*mc)))) {
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data->crop = (sin(data->accumulator) + 1.0) * 32.0;
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mc->region.position.x = data->crop;
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mc->region.position.y = data->crop;
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mc->region.size.width = data->position->video.size.width - data->crop*2;
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mc->region.size.height = data->position->video.size.height - data->crop*2;
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}
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if ((mcs = spa_buffer_find_meta_data(buf, SPA_META_Cursor, sizeof(*mcs)))) {
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struct spa_meta_bitmap *mb;
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uint32_t *bitmap, color;
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mcs->id = 1;
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mcs->position.x = (sin(data->accumulator) + 1.0) * 160.0 + 80;
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mcs->position.y = (cos(data->accumulator) + 1.0) * 100.0 + 50;
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mcs->hotspot.x = 0;
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mcs->hotspot.y = 0;
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mcs->bitmap_offset = sizeof(struct spa_meta_cursor);
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mb = SPA_PTROFF(mcs, mcs->bitmap_offset, struct spa_meta_bitmap);
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mb->format = SPA_VIDEO_FORMAT_ARGB;
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mb->size.width = CURSOR_WIDTH;
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mb->size.height = CURSOR_HEIGHT;
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mb->stride = CURSOR_WIDTH * CURSOR_BPP;
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mb->offset = sizeof(struct spa_meta_bitmap);
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bitmap = SPA_PTROFF(mb, mb->offset, uint32_t);
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color = (cos(data->accumulator) + 1.0) * (1 << 23);
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color |= 0xff000000;
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draw_elipse(bitmap, mb->size.width, mb->size.height, color);
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}
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for (i = 0; i < data->position->video.size.height; i++) {
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px = (struct pixel *)p;
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for (j = 0; j < data->position->video.size.width; j++) {
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px[j] = (struct pixel){map_value(data->counter + j * i), map_value(data->counter + j * (i + 1)), map_value(data->counter + j * (i + 2)), 1.0f};
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}
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p += data->stride;
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data->counter += 13;
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}
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data->accumulator += M_PI_M2 / 50.0;
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if (data->accumulator >= M_PI_M2)
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data->accumulator -= M_PI_M2;
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buf->datas[0].chunk->offset = 0;
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buf->datas[0].chunk->size = data->position->video.size.height * data->stride;
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buf->datas[0].chunk->stride = data->stride;
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pw_stream_queue_buffer(data->stream, b);
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}
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static void on_timeout(void *userdata, uint64_t expirations)
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{
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struct data *data = userdata;
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pw_log_trace("timeout");
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pw_stream_trigger_process(data->stream);
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}
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static void on_stream_state_changed(void *_data, enum pw_stream_state old, enum pw_stream_state state,
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const char *error)
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{
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struct data *data = _data;
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printf("stream state: \"%s\"\n", pw_stream_state_as_string(state));
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switch (state) {
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case PW_STREAM_STATE_ERROR:
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case PW_STREAM_STATE_UNCONNECTED:
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pw_main_loop_quit(data->loop);
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break;
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case PW_STREAM_STATE_PAUSED:
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printf("node id: %d\n", pw_stream_get_node_id(data->stream));
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pw_loop_update_timer(pw_main_loop_get_loop(data->loop),
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data->timer, NULL, NULL, false);
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break;
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case PW_STREAM_STATE_STREAMING:
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{
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struct timespec timeout, interval;
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timeout.tv_sec = 0;
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timeout.tv_nsec = 1;
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interval.tv_sec = 0;
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interval.tv_nsec = 40 * SPA_NSEC_PER_MSEC;
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pw_loop_update_timer(pw_main_loop_get_loop(data->loop),
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data->timer, &timeout, &interval, false);
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break;
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}
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default:
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break;
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}
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}
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static void
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on_stream_io_changed(void *_data, uint32_t id, void *area, uint32_t size)
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{
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struct data *data = _data;
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switch (id) {
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case SPA_IO_Position:
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data->position = area;
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if (data->position)
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pw_log_info("Position: %ux%u", data->position->video.size.width, data->position->video.size.height);
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break;
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}
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}
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static void
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on_stream_param_changed(void *_data, uint32_t id, const struct spa_pod *param)
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{
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struct data *data = _data;
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struct pw_stream *stream = data->stream;
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uint8_t params_buffer[1024];
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struct spa_pod_builder b = SPA_POD_BUILDER_INIT(params_buffer, sizeof(params_buffer));
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const struct spa_pod *params[5];
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if (param != NULL && id == SPA_PARAM_Tag) {
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spa_debug_pod(0, NULL, param);
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return;
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}
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if (param == NULL || id != SPA_PARAM_Format)
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return;
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spa_format_video_dsp_parse(param, &data->format);
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data->stride = SPA_ROUND_UP_N(data->position->video.size.width * BPP, 4);
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params[0] = spa_pod_builder_add_object(&b,
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SPA_TYPE_OBJECT_ParamBuffers, SPA_PARAM_Buffers,
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SPA_PARAM_BUFFERS_buffers, SPA_POD_CHOICE_RANGE_Int(8, 2, MAX_BUFFERS),
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SPA_PARAM_BUFFERS_blocks, SPA_POD_Int(1),
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SPA_PARAM_BUFFERS_size, SPA_POD_Int(data->stride * data->position->video.size.height),
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SPA_PARAM_BUFFERS_stride, SPA_POD_Int(data->stride));
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params[1] = spa_pod_builder_add_object(&b,
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SPA_TYPE_OBJECT_ParamMeta, SPA_PARAM_Meta,
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SPA_PARAM_META_type, SPA_POD_Id(SPA_META_Header),
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SPA_PARAM_META_size, SPA_POD_Int(sizeof(struct spa_meta_header)));
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params[2] = spa_pod_builder_add_object(&b,
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SPA_TYPE_OBJECT_ParamMeta, SPA_PARAM_Meta,
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SPA_PARAM_META_type, SPA_POD_Id(SPA_META_VideoDamage),
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SPA_PARAM_META_size, SPA_POD_CHOICE_RANGE_Int(
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sizeof(struct spa_meta_region) * 16,
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sizeof(struct spa_meta_region) * 1,
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sizeof(struct spa_meta_region) * 16));
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params[3] = spa_pod_builder_add_object(&b,
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SPA_TYPE_OBJECT_ParamMeta, SPA_PARAM_Meta,
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SPA_PARAM_META_type, SPA_POD_Id(SPA_META_VideoCrop),
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SPA_PARAM_META_size, SPA_POD_Int(sizeof(struct spa_meta_region)));
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#define CURSOR_META_SIZE(w,h) (sizeof(struct spa_meta_cursor) + \
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sizeof(struct spa_meta_bitmap) + w * h * CURSOR_BPP)
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params[4] = spa_pod_builder_add_object(&b,
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SPA_TYPE_OBJECT_ParamMeta, SPA_PARAM_Meta,
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SPA_PARAM_META_type, SPA_POD_Id(SPA_META_Cursor),
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SPA_PARAM_META_size, SPA_POD_Int(
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CURSOR_META_SIZE(CURSOR_WIDTH,CURSOR_HEIGHT)));
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pw_stream_update_params(stream, params, 5);
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}
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static void
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on_trigger_done(void *_data)
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{
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pw_log_trace("trigger done");
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}
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static const struct pw_stream_events stream_events = {
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PW_VERSION_STREAM_EVENTS,
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.process = on_process,
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.state_changed = on_stream_state_changed,
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.param_changed = on_stream_param_changed,
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.io_changed = on_stream_io_changed,
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.trigger_done = on_trigger_done,
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};
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static void do_quit(void *userdata, int signal_number)
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{
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struct data *data = userdata;
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pw_main_loop_quit(data->loop);
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}
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int main(int argc, char *argv[])
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{
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struct data data = { 0, };
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const struct spa_pod *params[2];
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uint8_t buffer[1024];
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struct spa_pod_builder b = SPA_POD_BUILDER_INIT(buffer, sizeof(buffer));
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pw_init(&argc, &argv);
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data.loop = pw_main_loop_new(NULL);
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pw_loop_add_signal(pw_main_loop_get_loop(data.loop), SIGINT, do_quit, &data);
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pw_loop_add_signal(pw_main_loop_get_loop(data.loop), SIGTERM, do_quit, &data);
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data.context = pw_context_new(pw_main_loop_get_loop(data.loop), NULL, 0);
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data.timer = pw_loop_add_timer(pw_main_loop_get_loop(data.loop), on_timeout, &data);
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data.core = pw_context_connect(data.context, NULL, 0);
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if (data.core == NULL) {
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fprintf(stderr, "can't connect: %m\n");
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data.res = -errno;
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goto cleanup;
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}
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data.stream = pw_stream_new(data.core, "video-src",
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pw_properties_new(
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PW_KEY_MEDIA_CLASS, "Video/Source",
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NULL));
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params[0] = spa_pod_builder_add_object(&b,
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SPA_TYPE_OBJECT_Format, SPA_PARAM_EnumFormat,
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SPA_FORMAT_mediaType, SPA_POD_Id(SPA_MEDIA_TYPE_video),
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SPA_FORMAT_mediaSubtype, SPA_POD_Id(SPA_MEDIA_SUBTYPE_dsp),
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SPA_FORMAT_VIDEO_format, SPA_POD_Id(SPA_VIDEO_FORMAT_DSP_F32));
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{
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struct spa_pod_frame f;
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struct spa_dict_item items[1];
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/* send a tag, output tags travel downstream */
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spa_tag_build_start(&b, &f, SPA_PARAM_Tag, SPA_DIRECTION_OUTPUT);
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items[0] = SPA_DICT_ITEM_INIT("my-tag-key", "my-special-tag-value");
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spa_tag_build_add_dict(&b, &SPA_DICT_INIT(items, 1));
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params[1] = spa_tag_build_end(&b, &f);
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}
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pw_stream_add_listener(data.stream,
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&data.stream_listener,
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&stream_events,
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&data);
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pw_stream_connect(data.stream,
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PW_DIRECTION_OUTPUT,
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PW_ID_ANY,
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PW_STREAM_FLAG_DRIVER |
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PW_STREAM_FLAG_MAP_BUFFERS,
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params, 2);
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pw_main_loop_run(data.loop);
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cleanup:
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pw_context_destroy(data.context);
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pw_main_loop_destroy(data.loop);
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pw_deinit();
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return data.res;
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}
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