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-rw-r--r--lv2/lv2plug.in/ns/ext/atom/forge.h72
1 files changed, 46 insertions, 26 deletions
diff --git a/lv2/lv2plug.in/ns/ext/atom/forge.h b/lv2/lv2plug.in/ns/ext/atom/forge.h
index 19b76e7..4db9638 100644
--- a/lv2/lv2plug.in/ns/ext/atom/forge.h
+++ b/lv2/lv2plug.in/ns/ext/atom/forge.h
@@ -53,11 +53,13 @@ extern "C" {
# include <stdbool.h>
#endif
+/** Handle for LV2_Atom_Forge_Sink. */
typedef void* LV2_Atom_Forge_Sink_Handle;
-typedef uint32_t (*LV2_Atom_Forge_Sink)(LV2_Atom_Forge_Sink_Handle handle,
- const void* buf,
- uint32_t size);
+/** Sink function for writing output. See lv2_atom_forge_set_sink(). */
+typedef void* (*LV2_Atom_Forge_Sink)(LV2_Atom_Forge_Sink_Handle handle,
+ const void* buf,
+ uint32_t size);
/** A stack frame used for keeping track of nested Atom containers. */
typedef struct _LV2_Atom_Forge_Frame {
@@ -125,9 +127,22 @@ lv2_atom_forge_set_buffer(LV2_Atom_Forge* forge, uint8_t* buf, size_t size)
forge->buf = buf;
forge->size = size;
forge->offset = 0;
+ forge->sink = NULL;
+ forge->handle = NULL;
}
-/** Set the sink function where @p forge will write output. */
+/**
+ Set the sink function where @p forge will write output.
+
+ The return value of forge functions is a pointer to the written data, which
+ is used for updating parent sizes. To enable this, the sink function must
+ return a valid pointer to a contiguous LV2_Atom header. For ringbuffers,
+ this should be possible as long as the size of the buffer is a multiple of
+ sizeof(LV2_Atom), since atoms are always aligned. When using a ringbuffer,
+ the returned pointers may not point to a complete atom (including body).
+ The user must take care to only use these return values in a way compatible
+ with the sink used.
+*/
static inline void
lv2_atom_forge_set_sink(LV2_Atom_Forge* forge,
LV2_Atom_Forge_Sink sink,
@@ -172,15 +187,21 @@ lv2_atom_forge_write_nopad(LV2_Atom_Forge* forge,
const void* data,
uint32_t size)
{
- /* TODO: Write to sink, if set */
- uint8_t* const out = forge->buf + forge->offset;
- if (forge->offset + size > forge->size) {
- return NULL;
+ uint8_t* out = NULL;
+ if (forge->sink) {
+ out = forge->sink(forge->handle, data, size);
+ } else {
+ out = forge->buf + forge->offset;
+ if (forge->offset + size > forge->size) {
+ return NULL;
+ }
+ forge->offset += size;
+ memcpy(out, data, size);
}
- forge->offset += size;
- memcpy(out, data, size);
- for (LV2_Atom_Forge_Frame* f = forge->stack; f; f = f->parent) {
- f->atom->size += size;
+ if (out) {
+ for (LV2_Atom_Forge_Frame* f = forge->stack; f; f = f->parent) {
+ f->atom->size += size;
+ }
}
return out;
}
@@ -351,8 +372,7 @@ lv2_atom_forge_vector_head(LV2_Atom_Forge* forge,
elem_count,
elem_type
};
- return (LV2_Atom_Vector*)lv2_atom_forge_write(
- forge, &a, sizeof(a));
+ return (LV2_Atom_Vector*)lv2_atom_forge_write(forge, &a, sizeof(a));
}
/** Write a complete atom:Vector. */
@@ -388,12 +408,12 @@ lv2_atom_forge_vector(LV2_Atom_Forge* forge,
lv2_atom_forge_pop(forge, &frame);
@endcode
*/
-static inline LV2_Atom*
+static inline LV2_Atom_Tuple*
lv2_atom_forge_tuple(LV2_Atom_Forge* forge, LV2_Atom_Forge_Frame* frame)
{
const LV2_Atom_Tuple a = { { forge->Tuple, 0 } };
LV2_Atom* atom = lv2_atom_forge_write(forge, &a, sizeof(a));
- return lv2_atom_forge_push(forge, frame, atom);
+ return (LV2_Atom_Tuple*)lv2_atom_forge_push(forge, frame, atom);
}
/**
@@ -420,7 +440,7 @@ lv2_atom_forge_tuple(LV2_Atom_Forge* forge, LV2_Atom_Forge_Frame* frame)
lv2_atom_forge_pop(forge, &frame);
@endcode
*/
-static inline LV2_Atom*
+static inline LV2_Atom_Object*
lv2_atom_forge_resource(LV2_Atom_Forge* forge,
LV2_Atom_Forge_Frame* frame,
LV2_URID id,
@@ -432,13 +452,13 @@ lv2_atom_forge_resource(LV2_Atom_Forge* forge,
otype
};
LV2_Atom* atom = (LV2_Atom*)lv2_atom_forge_write(forge, &a, sizeof(a));
- return lv2_atom_forge_push(forge, frame, atom);
+ return (LV2_Atom_Object*)lv2_atom_forge_push(forge, frame, atom);
}
/**
The same as lv2_atom_forge_resource(), but for object:Blank.
*/
-static inline LV2_Atom*
+static inline LV2_Atom_Object*
lv2_atom_forge_blank(LV2_Atom_Forge* forge,
LV2_Atom_Forge_Frame* frame,
uint32_t id,
@@ -450,7 +470,7 @@ lv2_atom_forge_blank(LV2_Atom_Forge* forge,
otype
};
LV2_Atom* atom = (LV2_Atom*)lv2_atom_forge_write(forge, &a, sizeof(a));
- return lv2_atom_forge_push(forge, frame, atom);
+ return (LV2_Atom_Object*)lv2_atom_forge_push(forge, frame, atom);
}
/**
@@ -472,7 +492,7 @@ lv2_atom_forge_property_head(LV2_Atom_Forge* forge,
The size of the returned sequence will be 0, so passing it as the parent
parameter to other forge methods will do the right thing.
*/
-static inline LV2_Atom*
+static inline LV2_Atom_Sequence*
lv2_atom_forge_sequence_head(LV2_Atom_Forge* forge,
LV2_Atom_Forge_Frame* frame,
uint32_t unit)
@@ -483,7 +503,7 @@ lv2_atom_forge_sequence_head(LV2_Atom_Forge* forge,
0
};
LV2_Atom* atom = (LV2_Atom*)lv2_atom_forge_write(forge, &a, sizeof(a));
- return lv2_atom_forge_push(forge, frame, atom);
+ return (LV2_Atom_Sequence*)lv2_atom_forge_push(forge, frame, atom);
}
/**
@@ -491,13 +511,13 @@ lv2_atom_forge_sequence_head(LV2_Atom_Forge* forge,
After this, call the appropriate forge method(s) to write the body, passing
the same @p parent parameter. Note the returned LV2_Event is NOT an Atom.
*/
-static inline LV2_Atom_Event*
+static inline LV2_Atom_Audio_Time*
lv2_atom_forge_audio_time(LV2_Atom_Forge* forge,
uint32_t frames,
uint32_t subframes)
{
const LV2_Atom_Audio_Time a = { frames, subframes };
- return (LV2_Atom_Event*)lv2_atom_forge_write(forge, &a, sizeof(a));
+ return (LV2_Atom_Audio_Time*)lv2_atom_forge_write(forge, &a, sizeof(a));
}
/**
@@ -505,11 +525,11 @@ lv2_atom_forge_audio_time(LV2_Atom_Forge* forge,
After this, call the appropriate forge method(s) to write the body, passing
the same @p parent parameter. Note the returned LV2_Event is NOT an Atom.
*/
-static inline LV2_Atom_Event*
+static inline double*
lv2_atom_forge_beat_time(LV2_Atom_Forge* forge,
double beats)
{
- return (LV2_Atom_Event*)lv2_atom_forge_write(forge, &beats, sizeof(beats));
+ return (double*)lv2_atom_forge_write(forge, &beats, sizeof(beats));
}
#ifdef __cplusplus
generated by cgit v1.2.1 (git 2.18.0) at 2024-12-28 04:51:01 +0000