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examples: video-play-fixate.c add fallback for older PipeWire versions

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The posibility to drop single modifier was added in this development
circle (after 0.3.39 release). To have clients work with older versions
of PipeWire dropping all modifiers can be an option.
This commit is contained in:
columbarius 2021-11-10 21:44:14 +01:00
parent 1c922958bc
commit 06b0512b22
1 changed files with 32 additions and 4 deletions
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36
src/examples/video-play-fixate.c
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@ -52,6 +52,12 @@ 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;
@ -82,6 +88,20 @@ struct data {
int counter;
};
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 init_modifiers(struct data *data)
{
data->n_mod_info = 1;
@ -104,10 +124,18 @@ static void strip_modifier(struct data *data, uint32_t spa_format, uint64_t modi
return;
struct modifier_info *mod_info = &data->mod_info[0];
uint32_t counter = 0;
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];
// 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\n");
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\n");
counter = 0;
}
mod_info->n_modifiers = counter;
}