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builder: improve builder

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Only write a prop or control header when not already done.
This commit is contained in:
Wim Taymans 2019-01-16 17:33:46 +01:00
parent dad153ce28
commit cb346c0745
1 changed files with 21 additions and 12 deletions
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33
spa/include/spa/pod/builder.h
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@ -44,6 +44,7 @@ struct spa_pod_builder_state {
#define SPA_POD_BUILDER_FLAG_FIRST (1<<1)
#define SPA_POD_BUILDER_FLAG_OBJECT (1<<2)
#define SPA_POD_BUILDER_FLAG_SEQUENCE (1<<3)
#define SPA_POD_BUILDER_FLAG_HEADER (1<<4)
uint32_t flags;
int depth;
};
@ -115,13 +116,13 @@ spa_pod_builder_update_frame(struct spa_pod_builder *builder, struct spa_pod_fra
switch (frame->pod.type) {
case SPA_TYPE_Array:
case SPA_TYPE_Choice:
builder->state.flags |= SPA_POD_BUILDER_FLAG_BODY;
builder->state.flags = SPA_POD_BUILDER_FLAG_BODY;
break;
case SPA_TYPE_Object:
builder->state.flags |= SPA_POD_BUILDER_FLAG_OBJECT;
builder->state.flags = SPA_POD_BUILDER_FLAG_OBJECT;
break;
case SPA_TYPE_Sequence:
builder->state.flags |= SPA_POD_BUILDER_FLAG_SEQUENCE;
builder->state.flags = SPA_POD_BUILDER_FLAG_SEQUENCE;
break;
}
}
@ -134,8 +135,9 @@ spa_pod_builder_push(struct spa_pod_builder *builder,
struct spa_pod_frame *frame = &builder->frame[builder->state.depth++];
frame->pod = *pod;
frame->ref = ref;
builder->state.flags = SPA_POD_BUILDER_FLAG_FIRST;
spa_pod_builder_update_frame(builder, frame);
if (builder->state.flags & SPA_POD_BUILDER_FLAG_BODY)
SPA_FLAG_SET(builder->state.flags, SPA_POD_BUILDER_FLAG_FIRST);
return ref;
}
@ -169,6 +171,7 @@ static inline void spa_pod_builder_pad(struct spa_pod_builder *builder, uint32_t
size = SPA_ROUND_UP_N(size, 8) - size;
if (size)
spa_pod_builder_raw(builder, &zeroes, size);
SPA_FLAG_UNSET(builder->state.flags, SPA_POD_BUILDER_FLAG_HEADER);
}
static inline uint32_t
@ -188,9 +191,10 @@ static inline void *spa_pod_builder_pop(struct spa_pod_builder *builder)
if ((pod = (struct spa_pod *) spa_pod_builder_deref_checked(builder, frame->ref, true)) != NULL)
*pod = frame->pod;
builder->state.flags = 0;
if ((frame = spa_pod_builder_top(builder)) != NULL)
spa_pod_builder_update_frame(builder, frame);
else
builder->state.flags = 0;
spa_pod_builder_pad(builder, builder->state.offset);
@ -425,7 +429,9 @@ static inline uint32_t
spa_pod_builder_prop(struct spa_pod_builder *builder, uint32_t key, uint32_t flags)
{
const struct { uint32_t key; uint32_t flags; } p = { key, flags };
return spa_pod_builder_raw(builder, &p, sizeof(p));
uint32_t ref = spa_pod_builder_raw(builder, &p, sizeof(p));
SPA_FLAG_SET(builder->state.flags, SPA_POD_BUILDER_FLAG_HEADER);
return ref;
}
#define SPA_POD_INIT_Sequence(size,unit) \
@ -444,7 +450,9 @@ static inline uint32_t
spa_pod_builder_control_header(struct spa_pod_builder *builder, uint32_t offset, uint32_t type)
{
const struct { uint32_t offset; uint32_t type; } p = { offset, type };
return spa_pod_builder_raw(builder, &p, sizeof(p));
uint32_t ref = spa_pod_builder_raw(builder, &p, sizeof(p));
SPA_FLAG_SET(builder->state.flags, SPA_POD_BUILDER_FLAG_HEADER);
return ref;
}
static inline uint32_t spa_choice_from_id(char id)
@ -568,14 +576,14 @@ spa_pod_builder_addv(struct spa_pod_builder *builder, va_list args)
int n_values = 1;
bool do_pop = false;
if (SPA_FLAG_CHECK(builder->state.flags, SPA_POD_BUILDER_FLAG_OBJECT)) {
if (builder->state.flags == SPA_POD_BUILDER_FLAG_OBJECT) {
uint32_t key = va_arg(args, uint32_t);
if (key == 0)
break;
if (key != SPA_ID_INVALID)
spa_pod_builder_prop(builder, key, 0);
}
else if (SPA_FLAG_CHECK(builder->state.flags, SPA_POD_BUILDER_FLAG_SEQUENCE)) {
else if (builder->state.flags == SPA_POD_BUILDER_FLAG_SEQUENCE) {
uint32_t offset = va_arg(args, uint32_t);
uint32_t type = va_arg(args, uint32_t);
if (type == 0)
@ -583,6 +591,7 @@ spa_pod_builder_addv(struct spa_pod_builder *builder, va_list args)
if (type != SPA_ID_INVALID)
spa_pod_builder_control_header(builder, offset, type);
}
again:
switch (*format) {
case '{':
@ -671,13 +680,13 @@ static inline void *spa_pod_builder_add(struct spa_pod_builder *builder, ...)
offset, type, ##__VA_ARGS__
#define spa_pod_builder_add_object(b,type,id,...) \
spa_pod_builder_add(b, SPA_POD_Object(type,id,##__VA_ARGS__), NULL)
spa_pod_builder_add(b, SPA_POD_Object(type,id,##__VA_ARGS__), NULL, NULL, NULL)
#define spa_pod_builder_add_struct(b,...) \
spa_pod_builder_add(b, SPA_POD_Struct(__VA_ARGS__), NULL)
spa_pod_builder_add(b, SPA_POD_Struct(__VA_ARGS__), NULL, NULL, NULL)
#define spa_pod_builder_add_sequence(b,unit,...) \
spa_pod_builder_add(b, SPA_POD_Sequence(unit,__VA_ARGS__), NULL)
spa_pod_builder_add(b, SPA_POD_Sequence(unit,__VA_ARGS__), NULL, NULL, NULL)
#define SPA_CHOICE_RANGE(def,min,max) 3,(def),(min),(max)
#define SPA_CHOICE_STEP(def,min,max,step) 4,(def),(min),(max),(step)