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video-play-fixate.c

Video input stream using pw_stream, with format fixation.

Video input stream using pw_stream, with format fixation.

/* PipeWire */
/* SPDX-FileCopyrightText: Copyright © 2020 Wim Taymans */
/* SPDX-License-Identifier: MIT */
/*
[title]
Video input stream using \ref pw_stream "pw_stream", with format fixation.
[title]
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <libdrm/drm_fourcc.h>
#include <sys/mman.h>
#include <sys/sysmacros.h>
#include <assert.h>
#include <spa/utils/json.h>
#include <spa/utils/result.h>
#include <spa/param/dict-utils.h>
#include <spa/param/peer-utils.h>
#include <spa/param/video/format-utils.h>
#include <spa/param/props.h>
#include <spa/debug/format.h>
#include <spa/debug/pod.h>
#include <pipewire/pipewire.h>
#include <pipewire/capabilities.h>
#include "utils.h"
/* Comment out to test device ID negotation backward compatibility. */
#define SUPPORT_DEVICE_ID_NEGOTIATION 1
/* If defined, emulate failing to import DMA buffer. */
#define EMULATE_DMA_BUF_IMPORT_FAIL 1
#define WIDTH 640
#define HEIGHT 480
#define RATE 30
#define MAX_BUFFERS 64
#define MAX_MOD 8
#define MAX_PARAMS 16
#define MAX_DEVICE_IDS 16
#include "sdl.h"
struct pixel {
float r, g, b, a;
};
struct pw_version {
int major;
int minor;
int micro;
};
struct modifier_info {
uint32_t spa_format;
uint32_t n_modifiers;
uint64_t modifiers[MAX_MOD];
};
struct {
unsigned int major;
unsigned int minor;
struct modifier_info mod_info;
} devices[] = {
#if 1
{
.major = 100,
.minor = 100,
.mod_info = {
.spa_format = SPA_VIDEO_FORMAT_RGBA,
.modifiers = { DRM_FORMAT_MOD_LINEAR, DRM_FORMAT_MOD_INVALID },
.n_modifiers = 2,
},
},
#endif
#if 1
{
.major = 200,
.minor = 200,
.mod_info = {
.spa_format = SPA_VIDEO_FORMAT_RGBA,
.modifiers = {DRM_FORMAT_MOD_LINEAR, DRM_FORMAT_MOD_GENERIC_16_16_TILE},
.n_modifiers = 2,
},
},
#endif
};
struct data {
const char *path;
SDL_Renderer *renderer;
SDL_Window *window;
SDL_Texture *texture;
SDL_Texture *cursor;
struct pw_main_loop *loop;
struct spa_source *reneg;
struct pw_stream *stream;
struct spa_hook stream_listener;
struct spa_video_info format;
int32_t stride;
struct spa_rectangle size;
int counter;
bool capabilities_known;
bool device_negotiation_supported;
dev_t device_ids[MAX_DEVICE_IDS];
size_t n_device_ids;
int used_device_index;
};
static int build_formats(struct data *data, struct spa_pod_builder *b, const struct spa_pod **params);
#ifdef EMULATE_DMA_BUF_IMPORT_FAIL
static struct pw_version parse_pw_version(const char* version) {
struct pw_version pw_version;
sscanf(version, "%d.%d.%d", &pw_version.major, &pw_version.minor,
&pw_version.micro);
return pw_version;
}
static bool has_pw_version(int major, int minor, int micro) {
struct pw_version pw_version = parse_pw_version(pw_get_library_version());
printf("PW Version: %d.%d.%d\n", pw_version.major, pw_version.minor,
pw_version.micro);
return major <= pw_version.major && minor <= pw_version.minor && micro <= pw_version.micro;
}
static void strip_modifier(struct data *data, uint32_t spa_format, uint64_t modifier)
{
struct modifier_info *mod_info;
assert(data->used_device_index >= 0);
mod_info = &devices[data->used_device_index].mod_info;
if (mod_info->spa_format != spa_format)
return;
uint32_t counter = 0;
// Dropping of single modifiers is only supported on PipeWire 0.3.40 and newer.
// On older PipeWire just dropping all modifiers might work on Versions newer then 0.3.33/35
if (has_pw_version(0,3,40)) {
printf("Dropping a single modifier from device %u:%u\n",
devices[data->used_device_index].major,
devices[data->used_device_index].minor);
for (uint32_t i = 0; i < mod_info->n_modifiers; i++) {
if (mod_info->modifiers[i] == modifier)
continue;
mod_info->modifiers[counter++] = mod_info->modifiers[i];
}
} else {
printf("Dropping all modifiers from device %u:%u\n",
devices[data->used_device_index].major,
devices[data->used_device_index].minor);
counter = 0;
}
mod_info->n_modifiers = counter;
}
#endif /* EMULATE_DMA_BUF_IMPORT_FAIL */
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;
}
}
}
static struct spa_pod *build_format(struct data *data, struct spa_pod_builder *b,
SDL_RendererInfo *info, enum spa_video_format format, int device_index)
{
struct spa_pod_frame f[2];
int i, c;
uint64_t *modifiers;
int modifier_count;
if (device_index == -1) {
modifiers = NULL;
modifier_count = 0;
} else {
struct modifier_info *mod_info = &devices[device_index].mod_info;
modifiers = mod_info->modifiers;
modifier_count = mod_info->n_modifiers;
}
spa_pod_builder_push_object(b, &f[0], SPA_TYPE_OBJECT_Format, SPA_PARAM_EnumFormat);
spa_pod_builder_add(b, SPA_FORMAT_mediaType, SPA_POD_Id(SPA_MEDIA_TYPE_video), 0);
spa_pod_builder_add(b, SPA_FORMAT_mediaSubtype, SPA_POD_Id(SPA_MEDIA_SUBTYPE_raw), 0);
/* device */
if (data->device_negotiation_supported && device_index >= 0) {
dev_t device_id = makedev(devices[device_index].major,
devices[device_index].minor);
spa_pod_builder_prop(b, SPA_FORMAT_VIDEO_deviceId,
SPA_POD_PROP_FLAG_MANDATORY);
spa_pod_builder_bytes(b, &device_id, sizeof device_id);
}
/* format */
spa_pod_builder_add(b, SPA_FORMAT_VIDEO_format, SPA_POD_Id(format), 0);
/* modifiers */
if (modifier_count == 1 && modifiers[0] == DRM_FORMAT_MOD_INVALID) {
// we only support implicit modifiers, use shortpath to skip fixation phase
spa_pod_builder_prop(b, SPA_FORMAT_VIDEO_modifier, SPA_POD_PROP_FLAG_MANDATORY);
spa_pod_builder_long(b, modifiers[0]);
} else if (modifier_count > 0) {
// build an enumeration of modifiers
spa_pod_builder_prop(b, SPA_FORMAT_VIDEO_modifier, SPA_POD_PROP_FLAG_MANDATORY | SPA_POD_PROP_FLAG_DONT_FIXATE);
spa_pod_builder_push_choice(b, &f[1], SPA_CHOICE_Enum, 0);
// modifiers from the array
for (i = 0, c = 0; i < modifier_count; i++) {
spa_pod_builder_long(b, modifiers[i]);
if (c++ == 0)
spa_pod_builder_long(b, modifiers[i]);
}
spa_pod_builder_pop(b, &f[1]);
}
spa_pod_builder_add(b, SPA_FORMAT_VIDEO_size,
SPA_POD_CHOICE_RANGE_Rectangle(
&SPA_RECTANGLE(WIDTH, HEIGHT),
&SPA_RECTANGLE(1,1),
&SPA_RECTANGLE(info->max_texture_width,
info->max_texture_height)),
0);
spa_pod_builder_add(b, SPA_FORMAT_VIDEO_framerate,
SPA_POD_CHOICE_RANGE_Fraction(
&SPA_FRACTION(25,1),
&SPA_FRACTION(0,1),
&SPA_FRACTION(30,1)),
0);
return spa_pod_builder_pop(b, &f[0]);
}
/* our data processing function is in general:
*
* struct pw_buffer *b;
* b = pw_stream_dequeue_buffer(stream);
*
* .. do stuff with buffer ...
*
* pw_stream_queue_buffer(stream, b);
*/
static void
on_process(void *_data)
{
struct data *data = _data;
struct pw_stream *stream = data->stream;
struct pw_buffer *b;
struct spa_buffer *buf;
struct spa_data *d;
void *sdata, *ddata;
int sstride, dstride, ostride;
uint32_t i;
uint8_t *src, *dst;
bool needs_unmap = false;
b = NULL;
/* dequeue and queue old buffers, use the last available
* buffer */
while (true) {
struct pw_buffer *t;
if ((t = pw_stream_dequeue_buffer(stream)) == NULL)
break;
if (b)
pw_stream_queue_buffer(stream, b);
b = t;
}
if (b == NULL) {
pw_log_warn("out of buffers: %m");
return;
}
buf = b->buffer;
d = buf->datas;
pw_log_info("new buffer %p", buf);
handle_events(data);
#ifdef EMULATE_DMA_BUF_IMPORT_FAIL
if (buf->datas[0].type == SPA_DATA_DmaBuf) {
// Simulate a failed import of a DmaBuf
// We should try another modifier
printf("Failed to import dmabuf, stripping modifier %"PRIu64"\n", data->format.info.raw.modifier);
strip_modifier(data, data->format.info.raw.format, data->format.info.raw.modifier);
pw_loop_signal_event(pw_main_loop_get_loop(data->loop), data->reneg);
goto done;
}
#endif
if (buf->datas[0].type == SPA_DATA_DmaBuf) {
sdata = mmap(NULL, d[0].maxsize, PROT_READ,
MAP_SHARED, d[0].fd, d[0].mapoffset);
needs_unmap = true;
} else {
sdata = buf->datas[0].data;
}
if (sdata == NULL)
goto done;
if (SDL_LockTexture(data->texture, NULL, &ddata, &dstride) < 0) {
fprintf(stderr, "Couldn't lock texture: %s\n", 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->size.height;
ostride = SPA_MIN(sstride, dstride);
src = sdata;
dst = ddata;
for (i = 0; i < data->size.height; i++) {
memcpy(dst, src, ostride);
src += sstride;
dst += dstride;
}
SDL_UnlockTexture(data->texture);
SDL_RenderClear(data->renderer);
/* now render the video */
SDL_RenderCopy(data->renderer, data->texture, NULL, NULL);
SDL_RenderPresent(data->renderer);
done:
if (needs_unmap)
munmap(d[0].data, d[0].maxsize);
pw_stream_queue_buffer(stream, b);
}
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;
fprintf(stderr, "stream state: \"%s\"\n", pw_stream_state_as_string(state));
switch (state) {
case PW_STREAM_STATE_UNCONNECTED:
pw_main_loop_quit(data->loop);
break;
case PW_STREAM_STATE_PAUSED:
break;
case PW_STREAM_STATE_STREAMING:
default:
break;
}
}
static void
collect_device_ids(struct data *data, const char *json)
{
struct spa_json it;
int len;
const char *value;
struct spa_json sub;
char key[1024];
if ((len = spa_json_begin(&it, json, strlen(json), &value)) <= 0) {
fprintf(stderr, "invalid device IDs value\n");
return;
}
if (!spa_json_is_object(value, len)) {
fprintf(stderr, "device IDs not object\n");
return;
}
spa_json_enter(&it, &sub);
while ((len = spa_json_object_next(&sub, key, sizeof(key), &value)) > 0) {
struct spa_json devices_sub;
if (!spa_json_is_array(value, len)) {
fprintf(stderr, "available-devices not array\n");
return;
}
spa_json_enter(&sub, &devices_sub);
while ((len = spa_json_next(&devices_sub, &value)) > 0) {
char *string;
union {
dev_t device_id;
uint8_t buffer[1024];
} dec;
string = alloca(len + 1);
if (!spa_json_is_string(value, len)) {
fprintf(stderr, "device ID not string\n");
return;
}
if (spa_json_parse_string(value, len, string) <= 0) {
fprintf(stderr, "invalid device ID string\n");
return;
}
if (decode_hex(string, dec.buffer, sizeof (dec.buffer)) < 0) {
fprintf(stderr, "invalid device ID string\n");
return;
}
fprintf(stderr, "discovered device ID %u:%u\n",
major(dec.device_id), minor(dec.device_id));
data->device_ids[data->n_device_ids++] = dec.device_id;
}
}
}
static void
discover_capabilities(struct data *data, const struct spa_pod *param)
{
#ifdef SUPPORT_DEVICE_ID_NEGOTIATION
struct spa_peer_param_info info;
void *state = NULL;
while (spa_peer_param_parse(param, &info, sizeof(info), &state) == 1) {
struct spa_param_dict_info di;
if (spa_param_dict_parse(info.param, &di, sizeof(di)) > 0) {
struct spa_dict dict;
struct spa_dict_item *items;
const struct spa_dict_item *it;
if (spa_param_dict_info_parse(&di, sizeof(di), &dict, NULL) < 0)
return;
items = alloca(sizeof(struct spa_dict_item) * dict.n_items);
if (spa_param_dict_info_parse(&di, sizeof(di), &dict, items) < 0)
return;
spa_dict_for_each(it, &dict) {
if (spa_streq(it->key, PW_CAPABILITY_DEVICE_ID_NEGOTIATION)) {
int version = atoi(it->value);
if (version >= 1)
data->device_negotiation_supported = true;
} else if (spa_streq(it->key, PW_CAPABILITY_DEVICE_IDS)) {
collect_device_ids(data, it->value);
}
}
}
}
#endif /* SUPPORT_DEVICE_ID_NEGOTIATION */
}
static void
on_stream_peer_capability_changed(struct data *data, const struct spa_pod *param)
{
struct pw_stream *stream = data->stream;
printf("peer capability param changed: \n");
spa_debug_pod(4, NULL, param);
discover_capabilities(data, param);
if (!data->capabilities_known) {
const struct spa_pod *params[MAX_PARAMS];
uint32_t n_params = 0;
uint8_t buffer[1024];
struct spa_pod_builder b = SPA_POD_BUILDER_INIT(buffer, sizeof(buffer));
data->capabilities_known = true;
if (data->device_negotiation_supported)
printf("stream supports device negotiation\n");
else
printf("stream does not support device negotiation\n");
/* build the extra parameters to connect with. To connect, we can provide
* a list of supported formats. We use a builder that writes the param
* object to the stack. */
printf("supported formats:\n");
n_params = build_formats(data, &b, params);
pw_stream_update_params(data->stream, params, n_params);
printf("activating stream\n");
pw_stream_set_active(stream, true);
}
}
static int
find_device_id_from_param(const struct spa_pod *format, dev_t *device_id)
{
const struct spa_pod_prop *device_prop;
const void *bytes;
uint32_t size;
device_prop = spa_pod_find_prop(format, NULL, SPA_FORMAT_VIDEO_deviceId);
if (device_prop == NULL)
return -ENOENT;
if (spa_pod_parse_object (format, SPA_TYPE_OBJECT_Format, NULL,
SPA_FORMAT_VIDEO_deviceId, SPA_POD_OPT_Bytes(&bytes, &size)) < 0)
return -EINVAL;
if (size != sizeof(dev_t))
return -EINVAL;
*device_id = *(dev_t *)bytes;
return 0;
}
/* Be notified when the stream format param changes.
*
* We are now supposed to call pw_stream_finish_format() with success or
* failure, depending on if we can support the format. Because we gave
* a list of supported formats, this should be ok.
*
* As part of pw_stream_finish_format() we can provide parameters that
* will control the buffer memory allocation. This includes the metadata
* that we would like on our buffer, the size, alignment, etc.
*/
static void
on_stream_format_changed(struct data *data, const struct spa_pod *param)
{
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[MAX_PARAMS];
uint32_t n_params = 0;
Uint32 sdl_format;
void *d;
fprintf(stderr, "got format:\n");
spa_debug_format(2, NULL, param);
if (spa_format_parse(param, &data->format.media_type, &data->format.media_subtype) < 0)
return;
if (data->format.media_type != SPA_MEDIA_TYPE_video ||
data->format.media_subtype != SPA_MEDIA_SUBTYPE_raw)
return;
/* call a helper function to parse the format for us. */
spa_format_video_raw_parse(param, &data->format.info.raw);
sdl_format = id_to_sdl_format(data->format.info.raw.format);
data->size = data->format.info.raw.size;
if (data->device_negotiation_supported) {
dev_t device_id;
if (find_device_id_from_param(param, &device_id) == 0) {
size_t i;
for (i = 0; i < SPA_N_ELEMENTS(devices); i++) {
if (major(device_id) == devices[i].major &&
minor(device_id) == devices[i].minor) {
data->used_device_index = i;
printf("using negotiated device %u:%u\n",
devices[i].major, devices[i].minor);
break;
}
}
}
} else {
data->used_device_index = 0;
printf("using implicitly assumed device %u:%u\n",
devices[0].major, devices[0].minor);
}
if (sdl_format == SDL_PIXELFORMAT_UNKNOWN) {
pw_stream_set_error(stream, -EINVAL, "unknown pixel format");
return;
}
if (data->size.width == 0 || data->size.height == 0) {
pw_stream_set_error(stream, -EINVAL, "invalid size");
return;
}
data->texture = SDL_CreateTexture(data->renderer,
sdl_format,
SDL_TEXTUREACCESS_STREAMING,
data->size.width,
data->size.height);
if (SDL_LockTexture(data->texture, NULL, &d, &data->stride) < 0) {
pw_stream_set_error(stream, -EINVAL, "invalid texture format");
return;
}
SDL_UnlockTexture(data->texture);
/* a SPA_TYPE_OBJECT_ParamBuffers object defines the acceptable size,
* number, stride etc of the buffers */
params[n_params++] = 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->size.height),
SPA_PARAM_BUFFERS_stride, SPA_POD_Int(data->stride),
SPA_PARAM_BUFFERS_dataType, SPA_POD_CHOICE_FLAGS_Int((1<<SPA_DATA_MemPtr) | (1<<SPA_DATA_DmaBuf)));
/* we are done */
pw_stream_update_params(stream, params, n_params);
}
static void
on_stream_param_changed(void *_data, uint32_t id, const struct spa_pod *param)
{
struct data *data = _data;
if (param == NULL)
return;
switch (id) {
case SPA_PARAM_PeerCapability:
on_stream_peer_capability_changed(data, param);
break;
case SPA_PARAM_Format:
on_stream_format_changed(data, param);
break;
}
}
/* these are the stream events we listen for */
static const struct pw_stream_events stream_events = {
PW_VERSION_STREAM_EVENTS,
.state_changed = on_stream_state_changed,
.param_changed = on_stream_param_changed,
.process = on_process,
};
static bool
has_device_id(struct data *data, dev_t device_id)
{
size_t i;
if (data->n_device_ids == 0)
return true;
for (i = 0; i < data->n_device_ids; i++) {
if (data->device_ids[i] == device_id)
return true;
}
return false;
}
static int build_formats(struct data *data, struct spa_pod_builder *b, const struct spa_pod **params)
{
SDL_RendererInfo info;
int n_params = 0;
SDL_GetRendererInfo(data->renderer, &info);
if (data->device_negotiation_supported) {
size_t i;
for (i = 0; i < SPA_N_ELEMENTS(devices); i++) {
dev_t device_id;
device_id = makedev(devices[i].major, devices[i].minor);
if (!has_device_id(data, device_id)) {
fprintf(stderr, "filtered out %u:%u\n",
devices[i].major, devices[i].minor);
continue;
}
params[n_params++] = build_format(data, b,
&info, SPA_VIDEO_FORMAT_RGBA, i);
}
} else {
params[n_params++] = build_format(data, b,
&info, SPA_VIDEO_FORMAT_RGBA, 0);
}
params[n_params++] = build_format(data, b, &info, SPA_VIDEO_FORMAT_RGBA, -1);
for (int i=0; i < n_params; i++) {
spa_debug_format(2, NULL, params[i]);
}
return n_params;
}
static void reneg_format(void *_data, uint64_t expiration)
{
struct data *data = (struct data*) _data;
uint8_t buffer[1024];
struct spa_pod_builder b = SPA_POD_BUILDER_INIT(buffer, sizeof(buffer));
const struct spa_pod *params[MAX_PARAMS];
uint32_t n_params;
if (data->format.info.raw.format == 0)
return;
fprintf(stderr, "renegotiate formats:\n");
n_params = build_formats(data, &b, params);
pw_stream_update_params(data->stream, params, n_params);
}
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[MAX_PARAMS];
uint8_t buffer[1024];
struct spa_pod_builder b = SPA_POD_BUILDER_INIT(buffer, sizeof(buffer));
struct spa_pod_frame f;
struct pw_properties *props;
int res, n_params = 0;
SDL_RendererInfo info;
pw_init(&argc, &argv);
/* create a main loop */
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);
/* create a simple stream, the simple stream manages to core and remote
* objects for you if you don't need to deal with them
*
* If you plan to autoconnect your stream, 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 stream state. The most important event
* you need to listen to is the process event where you need to consume
* the data provided to you.
*/
props = pw_properties_new(PW_KEY_MEDIA_TYPE, "Video",
PW_KEY_MEDIA_CATEGORY, "Capture",
PW_KEY_MEDIA_ROLE, "Camera",
NULL),
data.path = argc > 1 ? argv[1] : NULL;
if (data.path)
/* Set stream target if given on command line */
pw_properties_set(props, PW_KEY_TARGET_OBJECT, data.path);
data.used_device_index = -1;
data.stream = pw_stream_new_simple(
pw_main_loop_get_loop(data.loop),
"video-play-fixate",
props,
&stream_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;
}
SDL_GetRendererInfo(data.renderer, &info);
/* Push bare minimum video format to inactive stream, and wait for
* sending actual format until capability discovery is done. */
spa_pod_builder_push_object(&b, &f, SPA_TYPE_OBJECT_Format, SPA_PARAM_EnumFormat);
spa_pod_builder_add(&b, SPA_FORMAT_mediaType,
SPA_POD_Id (SPA_MEDIA_TYPE_video),
0);
spa_pod_builder_add(&b, SPA_FORMAT_mediaSubtype,
SPA_POD_Id (SPA_MEDIA_SUBTYPE_raw),
0);
spa_pod_builder_add(&b, SPA_FORMAT_VIDEO_format,
SPA_POD_Id(SPA_VIDEO_FORMAT_RGBA),
0);
spa_pod_builder_add(&b, SPA_FORMAT_VIDEO_size,
SPA_POD_CHOICE_RANGE_Rectangle(
&SPA_RECTANGLE(WIDTH, HEIGHT),
&SPA_RECTANGLE(1,1),
&SPA_RECTANGLE(info.max_texture_width,
info.max_texture_height)),
0);
params[n_params++] = spa_pod_builder_pop(&b, &f);
#ifdef SUPPORT_DEVICE_ID_NEGOTIATION
params[n_params++] =
spa_param_dict_build_dict(&b, SPA_PARAM_Capability,
&SPA_DICT_ITEMS(
SPA_DICT_ITEM(PW_CAPABILITY_DEVICE_ID_NEGOTIATION, "1")));
#endif
/* now connect the stream, we need a direction (input/output),
* an optional target node to connect to, some flags and parameters
*/
if ((res = pw_stream_connect(data.stream,
PW_DIRECTION_INPUT,
PW_ID_ANY,
PW_STREAM_FLAG_AUTOCONNECT | /* try to automatically connect this stream */
PW_STREAM_FLAG_INACTIVE | /* set active after capability discovery */
PW_STREAM_FLAG_MAP_BUFFERS, /* mmap the buffer data for us */
params, n_params)) /* extra parameters, see above */ < 0) {
fprintf(stderr, "can't connect: %s\n", spa_strerror(res));
return -1;
}
data.reneg = pw_loop_add_event(pw_main_loop_get_loop(data.loop), reneg_format, &data);
/* do things until we quit the mainloop */
pw_main_loop_run(data.loop);
pw_stream_destroy(data.stream);
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);
pw_deinit();
return 0;
}
capabilities.h
pipewire/capabilities.h
format.h
spa/debug/format.h
pod.h
spa/debug/pod.h
dict-utils.h
PW_CAPABILITY_DEVICE_IDS
#define PW_CAPABILITY_DEVICE_IDS
Definition capabilities.h:38
PW_CAPABILITY_DEVICE_ID_NEGOTIATION
#define PW_CAPABILITY_DEVICE_ID_NEGOTIATION
< Link capable of device ID negotiation.
Definition capabilities.h:31
buffer
buffer[1023]
Definition core.h:437
PW_ID_ANY
#define PW_ID_ANY
Definition core.h:77
r
uint32_t int int const char int r
Definition core.h:447
res
uint32_t int int res
Definition core.h:433
PW_KEY_MEDIA_TYPE
#define PW_KEY_MEDIA_TYPE
Media.
Definition keys.h:512
PW_KEY_TARGET_OBJECT
#define PW_KEY_TARGET_OBJECT
a target object to link to.
Definition keys.h:579
PW_KEY_MEDIA_ROLE
#define PW_KEY_MEDIA_ROLE
Role: Movie, Music, Camera, Screen, Communication, Game, Notification, DSP, Production,...
Definition keys.h:518
PW_KEY_MEDIA_CATEGORY
#define PW_KEY_MEDIA_CATEGORY
Media Category: Playback, Capture, Duplex, Monitor, Manager.
Definition keys.h:515
pw_log_warn
#define pw_log_warn(...)
Definition log.h:179
pw_log_info
#define pw_log_info(...)
Definition log.h:180
pw_loop_signal_event
PW_API_LOOP_IMPL int pw_loop_signal_event(struct pw_loop *object, struct spa_source *source)
Definition loop.h:160
pw_loop_add_signal
PW_API_LOOP_IMPL struct spa_source * pw_loop_add_signal(struct pw_loop *object, int signal_number, spa_source_signal_func_t func, void *data)
Definition loop.h:177
pw_loop_add_event
PW_API_LOOP_IMPL struct spa_source * pw_loop_add_event(struct pw_loop *object, spa_source_event_func_t func, void *data)
Definition loop.h:156
pw_main_loop_quit
int pw_main_loop_quit(struct pw_main_loop *loop)
Quit a main loop.
Definition main-loop.c:108
pw_main_loop_destroy
void pw_main_loop_destroy(struct pw_main_loop *loop)
Destroy a loop.
Definition main-loop.c:73
pw_main_loop_run
int pw_main_loop_run(struct pw_main_loop *loop)
Run a main loop.
Definition main-loop.c:122
pw_main_loop_new
struct pw_main_loop * pw_main_loop_new(const struct spa_dict *props)
Create a new main loop.
Definition main-loop.c:63
pw_main_loop_get_loop
struct pw_loop * pw_main_loop_get_loop(struct pw_main_loop *loop)
Get the loop implementation.
Definition main-loop.c:96
pw_init
void pw_init(int *argc, char **argv[])
Initialize PipeWire.
Definition pipewire.c:499
pw_deinit
void pw_deinit(void)
Deinitialize PipeWire.
Definition pipewire.c:614
PW_DIRECTION_INPUT
#define PW_DIRECTION_INPUT
Definition port.h:53
pw_properties_new
struct pw_properties * pw_properties_new(const char *key,...)
Make a new properties object.
Definition properties.c:97
pw_properties_set
int pw_properties_set(struct pw_properties *properties, const char *key, const char *value)
Set a property value.
Definition properties.c:586
pw_stream_connect
int pw_stream_connect(struct pw_stream *stream, enum pw_direction direction, uint32_t target_id, enum pw_stream_flags flags, const struct spa_pod **params, uint32_t n_params)
Connect a stream for input or output on port_path.
Definition stream.c:1972
pw_stream_dequeue_buffer
struct pw_buffer * pw_stream_dequeue_buffer(struct pw_stream *stream)
Get a buffer that can be filled for playback streams or consumed for capture streams.
Definition stream.c:2543
pw_stream_state_as_string
const char * pw_stream_state_as_string(enum pw_stream_state state)
Convert a stream state to a readable string.
Definition stream.c:1705
pw_stream_state
pw_stream_state
The state of a stream.
Definition stream.h:251
pw_stream_set_error
int pw_stream_set_error(struct pw_stream *stream, int res, const char *error,...)
Set the stream in error state.
Definition stream.c:2278
pw_stream_update_params
int pw_stream_update_params(struct pw_stream *stream, const struct spa_pod **params, uint32_t n_params)
Update the param exposed on the stream.
Definition stream.c:2304
pw_stream_set_active
int pw_stream_set_active(struct pw_stream *stream, bool active)
Activate or deactivate the stream.
Definition stream.c:2433
pw_stream_queue_buffer
int pw_stream_queue_buffer(struct pw_stream *stream, struct pw_buffer *buffer)
Submit a buffer for playback or recycle a buffer for capture.
Definition stream.c:2584
pw_stream_new_simple
struct pw_stream * pw_stream_new_simple(struct pw_loop *loop, const char *name, struct pw_properties *props, const struct pw_stream_events *events, void *data)
Definition stream.c:1661
PW_VERSION_STREAM_EVENTS
#define PW_VERSION_STREAM_EVENTS
Definition stream.h:424
pw_stream_destroy
void pw_stream_destroy(struct pw_stream *stream)
Destroy a stream.
Definition stream.c:1780
PW_STREAM_FLAG_INACTIVE
@ PW_STREAM_FLAG_INACTIVE
start the stream inactive, pw_stream_set_active() needs to be called explicitly
Definition stream.h:473
PW_STREAM_FLAG_MAP_BUFFERS
@ PW_STREAM_FLAG_MAP_BUFFERS
mmap the buffers except DmaBuf that is not explicitly marked as mappable.
Definition stream.h:476
PW_STREAM_FLAG_AUTOCONNECT
@ PW_STREAM_FLAG_AUTOCONNECT
try to automatically connect this stream
Definition stream.h:471
PW_STREAM_STATE_PAUSED
@ PW_STREAM_STATE_PAUSED
paused
Definition stream.h:255
PW_STREAM_STATE_UNCONNECTED
@ PW_STREAM_STATE_UNCONNECTED
unconnected
Definition stream.h:253
PW_STREAM_STATE_STREAMING
@ PW_STREAM_STATE_STREAMING
streaming
Definition stream.h:256
SPA_DATA_MemPtr
@ SPA_DATA_MemPtr
pointer to memory, the data field in struct spa_data is set.
Definition buffer.h:43
SPA_DATA_DmaBuf
@ SPA_DATA_DmaBuf
fd to dmabuf memory.
Definition buffer.h:46
spa_debug_pod
SPA_API_DEBUG_POD int spa_debug_pod(int indent, const struct spa_type_info *info, const struct spa_pod *pod)
Definition pod.h:248
spa_debug_format
SPA_API_DEBUG_FORMAT int spa_debug_format(int indent, const struct spa_type_info *info, const struct spa_pod *format)
Definition format.h:222
SPA_DICT_ITEMS
#define SPA_DICT_ITEMS(...)
Definition dict.h:64
SPA_DICT_ITEM
#define SPA_DICT_ITEM(key, value)
Definition dict.h:47
spa_dict_for_each
#define spa_dict_for_each(item, dict)
Definition dict.h:71
spa_json_object_next
SPA_API_JSON_UTILS int spa_json_object_next(struct spa_json *iter, char *key, int maxkeylen, const char **value)
Definition json.h:151
spa_json_begin
SPA_API_JSON_UTILS int spa_json_begin(struct spa_json *iter, const char *data, size_t size, const char **val)
Definition json.h:47
spa_json_is_string
SPA_API_JSON bool spa_json_is_string(const char *val, int len)
Definition json-core.h:521
spa_json_next
SPA_API_JSON int spa_json_next(struct spa_json *iter, const char **value)
Get the next token.
Definition json-core.h:101
spa_json_is_object
SPA_API_JSON int spa_json_is_object(const char *val, int len)
Definition json-core.h:416
spa_json_enter
SPA_API_JSON void spa_json_enter(struct spa_json *iter, struct spa_json *sub)
Definition json-core.h:78
spa_json_is_array
SPA_API_JSON bool spa_json_is_array(const char *val, int len)
Definition json-core.h:422
spa_json_parse_string
SPA_API_JSON int spa_json_parse_string(const char *val, int len, char *result)
Definition json-core.h:608
spa_param_dict_info_parse
SPA_API_DICT_UTILS int spa_param_dict_info_parse(const struct spa_param_dict_info *info, size_t size, struct spa_dict *dict, struct spa_dict_item *items)
Definition dict-utils.h:89
spa_param_dict_parse
SPA_API_DICT_UTILS int spa_param_dict_parse(const struct spa_pod *dict, struct spa_param_dict_info *info, size_t size)
Definition dict-utils.h:80
spa_format
spa_format
properties for audio SPA_TYPE_OBJECT_Format
Definition format.h:96
spa_peer_param_parse
SPA_API_PEER_PARAM_UTILS int spa_peer_param_parse(const struct spa_pod *param, struct spa_peer_param_info *info, size_t size, void **state)
Definition peer-utils.h:42
spa_format_video_raw_parse
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:38
spa_format_parse
SPA_API_FORMAT_UTILS int spa_format_parse(const struct spa_pod *format, uint32_t *media_type, uint32_t *media_subtype)
Definition format-utils.h:37
spa_video_format
spa_video_format
Video formats.
Definition raw.h:43
spa_param_dict_build_dict
SPA_API_DICT_UTILS struct spa_pod * spa_param_dict_build_dict(struct spa_pod_builder *builder, uint32_t id, struct spa_dict *dict)
Definition dict-utils.h:48
SPA_MEDIA_TYPE_video
@ SPA_MEDIA_TYPE_video
Definition format.h:28
SPA_PARAM_Capability
@ SPA_PARAM_Capability
capability info, a SPA_TYPE_OBJECT_ParamDict, Since 1.5.84
Definition param.h:50
SPA_PARAM_PeerCapability
@ SPA_PARAM_PeerCapability
peer capabilities, a SPA_TYPE_OBJECT_PeerParam with SPA_TYPE_OBJECT_ParamDict, since 1....
Definition param.h:51
SPA_PARAM_Format
@ SPA_PARAM_Format
configured format as SPA_TYPE_OBJECT_Format
Definition param.h:34
SPA_PARAM_EnumFormat
@ SPA_PARAM_EnumFormat
available formats as SPA_TYPE_OBJECT_Format
Definition param.h:33
SPA_PARAM_Buffers
@ SPA_PARAM_Buffers
buffer configurations as SPA_TYPE_OBJECT_ParamBuffers
Definition param.h:35
SPA_FORMAT_VIDEO_framerate
@ SPA_FORMAT_VIDEO_framerate
frame rate (Fraction)
Definition format.h:134
SPA_FORMAT_mediaType
@ SPA_FORMAT_mediaType
media type (Id enum spa_media_type)
Definition format.h:99
SPA_FORMAT_VIDEO_size
@ SPA_FORMAT_VIDEO_size
size (Rectangle)
Definition format.h:133
SPA_FORMAT_VIDEO_modifier
@ SPA_FORMAT_VIDEO_modifier
format modifier (Long) use only with DMA-BUF and omit for other buffer types
Definition format.h:131
SPA_FORMAT_VIDEO_deviceId
@ SPA_FORMAT_VIDEO_deviceId
dev_t identifier (Bytes)
Definition format.h:152
SPA_FORMAT_VIDEO_format
@ SPA_FORMAT_VIDEO_format
video format (Id enum spa_video_format)
Definition format.h:130
SPA_FORMAT_mediaSubtype
@ SPA_FORMAT_mediaSubtype
media subtype (Id enum spa_media_subtype)
Definition format.h:100
SPA_MEDIA_SUBTYPE_raw
@ SPA_MEDIA_SUBTYPE_raw
Definition format.h:38
SPA_VIDEO_FORMAT_RGBA
@ SPA_VIDEO_FORMAT_RGBA
Definition raw.h:56
SPA_PARAM_BUFFERS_dataType
@ SPA_PARAM_BUFFERS_dataType
possible memory types (flags choice Int, mask of enum spa_data_type)
Definition buffers.h:32
SPA_PARAM_BUFFERS_size
@ SPA_PARAM_BUFFERS_size
size of a data block memory (Int)
Definition buffers.h:29
SPA_PARAM_BUFFERS_stride
@ SPA_PARAM_BUFFERS_stride
stride of data block memory (Int)
Definition buffers.h:30
SPA_PARAM_BUFFERS_blocks
@ SPA_PARAM_BUFFERS_blocks
number of data blocks per buffer (Int)
Definition buffers.h:28
SPA_PARAM_BUFFERS_buffers
@ SPA_PARAM_BUFFERS_buffers
number of buffers (Int)
Definition buffers.h:27
spa_pod_builder_pop
SPA_API_POD_BUILDER void * spa_pod_builder_pop(struct spa_pod_builder *builder, struct spa_pod_frame *frame)
Definition builder.h:213
spa_pod_builder_long
SPA_API_POD_BUILDER int spa_pod_builder_long(struct spa_pod_builder *builder, int64_t val)
Definition builder.h:305
spa_pod_builder_push_choice
SPA_API_POD_BUILDER int spa_pod_builder_push_choice(struct spa_pod_builder *builder, struct spa_pod_frame *frame, uint32_t type, uint32_t flags)
Definition builder.h:446
spa_pod_find_prop
SPA_API_POD_ITER const struct spa_pod_prop * spa_pod_find_prop(const struct spa_pod *pod, const struct spa_pod_prop *start, uint32_t key)
Definition iter.h:274
SPA_POD_CHOICE_RANGE_Fraction
#define SPA_POD_CHOICE_RANGE_Fraction(def, min, max)
Definition vararg.h:123
SPA_POD_PROP_FLAG_MANDATORY
#define SPA_POD_PROP_FLAG_MANDATORY
is mandatory, when filtering, both sides need this property or filtering fails.
Definition pod.h:241
SPA_POD_CHOICE_RANGE_Int
#define SPA_POD_CHOICE_RANGE_Int(def, min, max)
Definition vararg.h:62
spa_pod_builder_add
SPA_API_POD_BUILDER int spa_pod_builder_add(struct spa_pod_builder *builder,...)
Definition builder.h:713
SPA_POD_Id
#define SPA_POD_Id(val)
Definition vararg.h:53
SPA_POD_BUILDER_INIT
#define SPA_POD_BUILDER_INIT(buffer, size)
Definition builder.h:72
SPA_POD_CHOICE_RANGE_Rectangle
#define SPA_POD_CHOICE_RANGE_Rectangle(def, min, max)
Definition vararg.h:114
spa_pod_builder_push_object
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:475
SPA_POD_PROP_FLAG_DONT_FIXATE
#define SPA_POD_PROP_FLAG_DONT_FIXATE
choices need no fixation
Definition pod.h:244
spa_pod_builder_bytes
SPA_API_POD_BUILDER int spa_pod_builder_bytes(struct spa_pod_builder *builder, const void *bytes, uint32_t len)
Definition builder.h:361
spa_pod_builder_add_object
#define spa_pod_builder_add_object(b, type, id,...)
Definition builder.h:725
spa_pod_parse_object
#define spa_pod_parse_object(pod, type, id,...)
Definition parser.h:935
SPA_POD_Int
#define SPA_POD_Int(val)
Definition vararg.h:58
SPA_POD_CHOICE_FLAGS_Int
#define SPA_POD_CHOICE_FLAGS_Int(flags)
Definition vararg.h:66
spa_pod_builder_prop
SPA_API_POD_BUILDER int spa_pod_builder_prop(struct spa_pod_builder *builder, uint32_t key, uint32_t flags)
Definition builder.h:490
SPA_POD_OPT_Bytes
#define SPA_POD_OPT_Bytes(val, len)
Definition parser.h:878
SPA_CHOICE_Enum
@ SPA_CHOICE_Enum
list: default, alternative,...
Definition pod.h:164
spa_streq
SPA_API_STRING bool spa_streq(const char *s1, const char *s2)
Definition string.h:52
SPA_TYPE_OBJECT_ParamBuffers
@ SPA_TYPE_OBJECT_ParamBuffers
Definition type.h:88
SPA_TYPE_OBJECT_Format
@ SPA_TYPE_OBJECT_Format
Definition type.h:87
SPA_MIN
#define SPA_MIN(a, b)
Definition defs.h:165
SPA_FRACTION
#define SPA_FRACTION(num, denom)
Definition defs.h:136
SPA_N_ELEMENTS
#define SPA_N_ELEMENTS(arr)
Definition defs.h:143
SPA_RECTANGLE
#define SPA_RECTANGLE(width, height)
Definition defs.h:115
json.h
spa/utils/json.h
peer-utils.h
pipewire.h
pipewire/pipewire.h
props.h
result.h
spa/utils/result.h
pw_buffer
a buffer structure obtained from pw_stream_dequeue_buffer().
Definition stream.h:261
pw_buffer::buffer
struct spa_buffer * buffer
the spa buffer
Definition stream.h:262
pw_properties
Definition properties.h:39
pw_stream_events
Events for a stream.
Definition stream.h:422
pw_stream
spa_buffer
A Buffer.
Definition buffer.h:110
spa_buffer::datas
struct spa_data * datas
array of data members
Definition buffer.h:114
spa_chunk::stride
int32_t stride
stride of valid data
Definition buffer.h:65
spa_chunk::size
uint32_t size
size of valid data.
Definition buffer.h:63
spa_data
Data for a buffer this stays constant for a buffer.
Definition buffer.h:78
spa_data::chunk
struct spa_chunk * chunk
valid chunk of memory
Definition buffer.h:106
spa_data::data
void * data
optional data pointer
Definition buffer.h:105
spa_data::type
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
spa_dict_item
Definition dict.h:41
spa_dict
Definition dict.h:51
spa_json
Definition json-core.h:49
spa_param_dict_info
helper structure for managing info objects
Definition dict.h:35
spa_peer_param_info
Definition peer.h:30
spa_pod_builder
Definition builder.h:63
spa_pod_frame
Definition body.h:38
spa_pod_prop
Definition pod.h:227
spa_pod
Definition pod.h:57