mirror of
https://gitlab.freedesktop.org/pipewire/pipewire
synced 2024-09-16 06:29:56 +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
|
@ -7,6 +7,7 @@ examples = [
|
|||
'video-play',
|
||||
'video-src',
|
||||
'video-dsp-play',
|
||||
'video-dsp-src',
|
||||
'video-play-pull',
|
||||
'video-play-reneg',
|
||||
'video-src-alloc',
|
||||
|
|
376
src/examples/video-dsp-src.c
Normal file
376
src/examples/video-dsp-src.c
Normal file
|
@ -0,0 +1,376 @@
|
|||
/* PipeWire */
|
||||
/* SPDX-FileCopyrightText: Copyright © 2018 Wim Taymans */
|
||||
/* SPDX-FileCopyrightText: Copyright © 2023 Columbarius */
|
||||
/* SPDX-License-Identifier: MIT */
|
||||
|
||||
/*
|
||||
[title]
|
||||
Video source using \ref pw_stream.
|
||||
[title]
|
||||
*/
|
||||
|
||||
#include <stdio.h>
|
||||
#include <errno.h>
|
||||
#include <signal.h>
|
||||
#include <math.h>
|
||||
|
||||
#include <spa/param/video/format-utils.h>
|
||||
#include <spa/param/tag-utils.h>
|
||||
#include <spa/debug/pod.h>
|
||||
|
||||
#include <pipewire/pipewire.h>
|
||||
|
||||
#define BPP 16
|
||||
#define CURSOR_WIDTH 64
|
||||
#define CURSOR_HEIGHT 64
|
||||
#define CURSOR_BPP 4
|
||||
|
||||
#define MAX_BUFFERS 64
|
||||
|
||||
#define M_PI_M2 ( M_PI + M_PI )
|
||||
|
||||
struct pixel {
|
||||
float r, g, b, a;
|
||||
};
|
||||
|
||||
struct data {
|
||||
struct pw_main_loop *loop;
|
||||
struct spa_source *timer;
|
||||
|
||||
struct pw_context *context;
|
||||
struct pw_core *core;
|
||||
|
||||
struct pw_stream *stream;
|
||||
struct spa_hook stream_listener;
|
||||
|
||||
struct spa_video_info_dsp format;
|
||||
int32_t stride;
|
||||
struct spa_io_position *position;
|
||||
|
||||
int counter;
|
||||
uint32_t seq;
|
||||
|
||||
double crop;
|
||||
double accumulator;
|
||||
int res;
|
||||
};
|
||||
|
||||
static void draw_elipse(uint32_t *dst, int width, int height, uint32_t color)
|
||||
{
|
||||
int i, j, r1, r2, r12, r22, r122;
|
||||
|
||||
r1 = width/2;
|
||||
r12 = r1 * r1;
|
||||
r2 = height/2;
|
||||
r22 = r2 * r2;
|
||||
r122 = r12 * r22;
|
||||
|
||||
for (i = -r2; i < r2; i++) {
|
||||
for (j = -r1; j < r1; j++) {
|
||||
dst[(i + r2)*width+(j+r1)] =
|
||||
(i * i * r12 + j * j * r22 <= r122) ? color : 0x00000000;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static inline float map_value(int value)
|
||||
{
|
||||
return (value%256)/255.0f;
|
||||
}
|
||||
|
||||
static void on_process(void *userdata)
|
||||
{
|
||||
struct data *data = userdata;
|
||||
struct pw_buffer *b;
|
||||
struct spa_buffer *buf;
|
||||
uint32_t i, j;
|
||||
uint8_t *p;
|
||||
struct pixel *px;
|
||||
struct spa_meta *m;
|
||||
struct spa_meta_header *h;
|
||||
struct spa_meta_region *mc;
|
||||
struct spa_meta_cursor *mcs;
|
||||
|
||||
if ((b = pw_stream_dequeue_buffer(data->stream)) == NULL) {
|
||||
pw_log_warn("out of buffers: %m");
|
||||
return;
|
||||
}
|
||||
|
||||
buf = b->buffer;
|
||||
if ((p = buf->datas[0].data) == NULL)
|
||||
return;
|
||||
|
||||
if ((h = spa_buffer_find_meta_data(buf, SPA_META_Header, sizeof(*h)))) {
|
||||
#if 0
|
||||
struct timespec now;
|
||||
clock_gettime(CLOCK_MONOTONIC, &now);
|
||||
h->pts = SPA_TIMESPEC_TO_NSEC(&now);
|
||||
#else
|
||||
h->pts = -1;
|
||||
#endif
|
||||
h->flags = 0;
|
||||
h->seq = data->seq++;
|
||||
h->dts_offset = 0;
|
||||
}
|
||||
if ((m = spa_buffer_find_meta(buf, SPA_META_VideoDamage))) {
|
||||
struct spa_meta_region *r = spa_meta_first(m);
|
||||
|
||||
if (spa_meta_check(r, m)) {
|
||||
r->region.position = SPA_POINT(0,0);
|
||||
r->region.size = data->position->video.size;
|
||||
r++;
|
||||
}
|
||||
if (spa_meta_check(r, m))
|
||||
r->region = SPA_REGION(0,0,0,0);
|
||||
}
|
||||
if ((mc = spa_buffer_find_meta_data(buf, SPA_META_VideoCrop, sizeof(*mc)))) {
|
||||
data->crop = (sin(data->accumulator) + 1.0) * 32.0;
|
||||
mc->region.position.x = data->crop;
|
||||
mc->region.position.y = data->crop;
|
||||
mc->region.size.width = data->position->video.size.width - data->crop*2;
|
||||
mc->region.size.height = data->position->video.size.height - data->crop*2;
|
||||
}
|
||||
if ((mcs = spa_buffer_find_meta_data(buf, SPA_META_Cursor, sizeof(*mcs)))) {
|
||||
struct spa_meta_bitmap *mb;
|
||||
uint32_t *bitmap, color;
|
||||
|
||||
mcs->id = 1;
|
||||
mcs->position.x = (sin(data->accumulator) + 1.0) * 160.0 + 80;
|
||||
mcs->position.y = (cos(data->accumulator) + 1.0) * 100.0 + 50;
|
||||
mcs->hotspot.x = 0;
|
||||
mcs->hotspot.y = 0;
|
||||
mcs->bitmap_offset = sizeof(struct spa_meta_cursor);
|
||||
|
||||
mb = SPA_PTROFF(mcs, mcs->bitmap_offset, struct spa_meta_bitmap);
|
||||
mb->format = SPA_VIDEO_FORMAT_ARGB;
|
||||
mb->size.width = CURSOR_WIDTH;
|
||||
mb->size.height = CURSOR_HEIGHT;
|
||||
mb->stride = CURSOR_WIDTH * CURSOR_BPP;
|
||||
mb->offset = sizeof(struct spa_meta_bitmap);
|
||||
|
||||
bitmap = SPA_PTROFF(mb, mb->offset, uint32_t);
|
||||
color = (cos(data->accumulator) + 1.0) * (1 << 23);
|
||||
color |= 0xff000000;
|
||||
|
||||
draw_elipse(bitmap, mb->size.width, mb->size.height, color);
|
||||
}
|
||||
|
||||
for (i = 0; i < data->position->video.size.height; i++) {
|
||||
px = (struct pixel *)p;
|
||||
for (j = 0; j < data->position->video.size.width; j++) {
|
||||
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};
|
||||
}
|
||||
p += data->stride;
|
||||
data->counter += 13;
|
||||
}
|
||||
|
||||
data->accumulator += M_PI_M2 / 50.0;
|
||||
if (data->accumulator >= M_PI_M2)
|
||||
data->accumulator -= M_PI_M2;
|
||||
|
||||
buf->datas[0].chunk->offset = 0;
|
||||
buf->datas[0].chunk->size = data->position->video.size.height * data->stride;
|
||||
buf->datas[0].chunk->stride = data->stride;
|
||||
|
||||
pw_stream_queue_buffer(data->stream, b);
|
||||
}
|
||||
|
||||
static void on_timeout(void *userdata, uint64_t expirations)
|
||||
{
|
||||
struct data *data = userdata;
|
||||
pw_log_trace("timeout");
|
||||
pw_stream_trigger_process(data->stream);
|
||||
}
|
||||
|
||||
static void on_stream_state_changed(void *_data, enum pw_stream_state old, enum pw_stream_state state,
|
||||
const char *error)
|
||||
{
|
||||
struct data *data = _data;
|
||||
|
||||
printf("stream state: \"%s\"\n", pw_stream_state_as_string(state));
|
||||
|
||||
switch (state) {
|
||||
case PW_STREAM_STATE_ERROR:
|
||||
case PW_STREAM_STATE_UNCONNECTED:
|
||||
pw_main_loop_quit(data->loop);
|
||||
break;
|
||||
|
||||
case PW_STREAM_STATE_PAUSED:
|
||||
printf("node id: %d\n", pw_stream_get_node_id(data->stream));
|
||||
pw_loop_update_timer(pw_main_loop_get_loop(data->loop),
|
||||
data->timer, NULL, NULL, false);
|
||||
break;
|
||||
case PW_STREAM_STATE_STREAMING:
|
||||
{
|
||||
struct timespec timeout, interval;
|
||||
|
||||
timeout.tv_sec = 0;
|
||||
timeout.tv_nsec = 1;
|
||||
interval.tv_sec = 0;
|
||||
interval.tv_nsec = 40 * SPA_NSEC_PER_MSEC;
|
||||
|
||||
pw_loop_update_timer(pw_main_loop_get_loop(data->loop),
|
||||
data->timer, &timeout, &interval, false);
|
||||
break;
|
||||
}
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
on_stream_io_changed(void *_data, uint32_t id, void *area, uint32_t size)
|
||||
{
|
||||
struct data *data = _data;
|
||||
|
||||
switch (id) {
|
||||
case SPA_IO_Position:
|
||||
data->position = area;
|
||||
if (data->position)
|
||||
pw_log_info("Position: %ux%u", data->position->video.size.width, data->position->video.size.height);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
on_stream_param_changed(void *_data, uint32_t id, const struct spa_pod *param)
|
||||
{
|
||||
struct data *data = _data;
|
||||
struct pw_stream *stream = data->stream;
|
||||
uint8_t params_buffer[1024];
|
||||
struct spa_pod_builder b = SPA_POD_BUILDER_INIT(params_buffer, sizeof(params_buffer));
|
||||
const struct spa_pod *params[5];
|
||||
|
||||
if (param != NULL && id == SPA_PARAM_Tag) {
|
||||
spa_debug_pod(0, NULL, param);
|
||||
return;
|
||||
}
|
||||
if (param == NULL || id != SPA_PARAM_Format)
|
||||
return;
|
||||
|
||||
spa_format_video_dsp_parse(param, &data->format);
|
||||
|
||||
data->stride = SPA_ROUND_UP_N(data->position->video.size.width * BPP, 4);
|
||||
|
||||
params[0] = spa_pod_builder_add_object(&b,
|
||||
SPA_TYPE_OBJECT_ParamBuffers, SPA_PARAM_Buffers,
|
||||
SPA_PARAM_BUFFERS_buffers, SPA_POD_CHOICE_RANGE_Int(8, 2, MAX_BUFFERS),
|
||||
SPA_PARAM_BUFFERS_blocks, SPA_POD_Int(1),
|
||||
SPA_PARAM_BUFFERS_size, SPA_POD_Int(data->stride * data->position->video.size.height),
|
||||
SPA_PARAM_BUFFERS_stride, SPA_POD_Int(data->stride));
|
||||
|
||||
params[1] = spa_pod_builder_add_object(&b,
|
||||
SPA_TYPE_OBJECT_ParamMeta, SPA_PARAM_Meta,
|
||||
SPA_PARAM_META_type, SPA_POD_Id(SPA_META_Header),
|
||||
SPA_PARAM_META_size, SPA_POD_Int(sizeof(struct spa_meta_header)));
|
||||
|
||||
params[2] = spa_pod_builder_add_object(&b,
|
||||
SPA_TYPE_OBJECT_ParamMeta, SPA_PARAM_Meta,
|
||||
SPA_PARAM_META_type, SPA_POD_Id(SPA_META_VideoDamage),
|
||||
SPA_PARAM_META_size, SPA_POD_CHOICE_RANGE_Int(
|
||||
sizeof(struct spa_meta_region) * 16,
|
||||
sizeof(struct spa_meta_region) * 1,
|
||||
sizeof(struct spa_meta_region) * 16));
|
||||
params[3] = spa_pod_builder_add_object(&b,
|
||||
SPA_TYPE_OBJECT_ParamMeta, SPA_PARAM_Meta,
|
||||
SPA_PARAM_META_type, SPA_POD_Id(SPA_META_VideoCrop),
|
||||
SPA_PARAM_META_size, SPA_POD_Int(sizeof(struct spa_meta_region)));
|
||||
#define CURSOR_META_SIZE(w,h) (sizeof(struct spa_meta_cursor) + \
|
||||
sizeof(struct spa_meta_bitmap) + w * h * CURSOR_BPP)
|
||||
params[4] = spa_pod_builder_add_object(&b,
|
||||
SPA_TYPE_OBJECT_ParamMeta, SPA_PARAM_Meta,
|
||||
SPA_PARAM_META_type, SPA_POD_Id(SPA_META_Cursor),
|
||||
SPA_PARAM_META_size, SPA_POD_Int(
|
||||
CURSOR_META_SIZE(CURSOR_WIDTH,CURSOR_HEIGHT)));
|
||||
|
||||
pw_stream_update_params(stream, params, 5);
|
||||
}
|
||||
|
||||
static void
|
||||
on_trigger_done(void *_data)
|
||||
{
|
||||
pw_log_trace("trigger done");
|
||||
}
|
||||
|
||||
static const struct pw_stream_events stream_events = {
|
||||
PW_VERSION_STREAM_EVENTS,
|
||||
.process = on_process,
|
||||
.state_changed = on_stream_state_changed,
|
||||
.param_changed = on_stream_param_changed,
|
||||
.io_changed = on_stream_io_changed,
|
||||
.trigger_done = on_trigger_done,
|
||||
};
|
||||
|
||||
static void do_quit(void *userdata, int signal_number)
|
||||
{
|
||||
struct data *data = userdata;
|
||||
pw_main_loop_quit(data->loop);
|
||||
}
|
||||
|
||||
int main(int argc, char *argv[])
|
||||
{
|
||||
struct data data = { 0, };
|
||||
const struct spa_pod *params[2];
|
||||
uint8_t buffer[1024];
|
||||
struct spa_pod_builder b = SPA_POD_BUILDER_INIT(buffer, sizeof(buffer));
|
||||
|
||||
pw_init(&argc, &argv);
|
||||
|
||||
data.loop = pw_main_loop_new(NULL);
|
||||
|
||||
pw_loop_add_signal(pw_main_loop_get_loop(data.loop), SIGINT, do_quit, &data);
|
||||
pw_loop_add_signal(pw_main_loop_get_loop(data.loop), SIGTERM, do_quit, &data);
|
||||
|
||||
data.context = pw_context_new(pw_main_loop_get_loop(data.loop), NULL, 0);
|
||||
|
||||
data.timer = pw_loop_add_timer(pw_main_loop_get_loop(data.loop), on_timeout, &data);
|
||||
|
||||
data.core = pw_context_connect(data.context, NULL, 0);
|
||||
if (data.core == NULL) {
|
||||
fprintf(stderr, "can't connect: %m\n");
|
||||
data.res = -errno;
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
data.stream = pw_stream_new(data.core, "video-src",
|
||||
pw_properties_new(
|
||||
PW_KEY_MEDIA_CLASS, "Video/Source",
|
||||
NULL));
|
||||
|
||||
params[0] = spa_pod_builder_add_object(&b,
|
||||
SPA_TYPE_OBJECT_Format, SPA_PARAM_EnumFormat,
|
||||
SPA_FORMAT_mediaType, SPA_POD_Id(SPA_MEDIA_TYPE_video),
|
||||
SPA_FORMAT_mediaSubtype, SPA_POD_Id(SPA_MEDIA_SUBTYPE_dsp),
|
||||
SPA_FORMAT_VIDEO_format, SPA_POD_Id(SPA_VIDEO_FORMAT_DSP_F32));
|
||||
|
||||
{
|
||||
struct spa_pod_frame f;
|
||||
struct spa_dict_item items[1];
|
||||
/* send a tag, output tags travel downstream */
|
||||
spa_tag_build_start(&b, &f, SPA_PARAM_Tag, SPA_DIRECTION_OUTPUT);
|
||||
items[0] = SPA_DICT_ITEM_INIT("my-tag-key", "my-special-tag-value");
|
||||
spa_tag_build_add_dict(&b, &SPA_DICT_INIT(items, 1));
|
||||
params[1] = spa_tag_build_end(&b, &f);
|
||||
}
|
||||
|
||||
pw_stream_add_listener(data.stream,
|
||||
&data.stream_listener,
|
||||
&stream_events,
|
||||
&data);
|
||||
|
||||
pw_stream_connect(data.stream,
|
||||
PW_DIRECTION_OUTPUT,
|
||||
PW_ID_ANY,
|
||||
PW_STREAM_FLAG_DRIVER |
|
||||
PW_STREAM_FLAG_MAP_BUFFERS,
|
||||
params, 2);
|
||||
|
||||
pw_main_loop_run(data.loop);
|
||||
|
||||
cleanup:
|
||||
pw_context_destroy(data.context);
|
||||
pw_main_loop_destroy(data.loop);
|
||||
pw_deinit();
|
||||
|
||||
return data.res;
|
||||
}
|
Loading…
Reference in a new issue