diff options
Diffstat (limited to 'third_party/pipewire/spa/pod/builder.h')
| -rw-r--r-- | third_party/pipewire/spa/pod/builder.h | 696 |
1 files changed, 696 insertions, 0 deletions
diff --git a/third_party/pipewire/spa/pod/builder.h b/third_party/pipewire/spa/pod/builder.h new file mode 100644 index 0000000000..624b543c40 --- /dev/null +++ b/third_party/pipewire/spa/pod/builder.h @@ -0,0 +1,696 @@ +/* Simple Plugin API + * + * Copyright © 2018 Wim Taymans + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +#ifndef SPA_POD_BUILDER_H +#define SPA_POD_BUILDER_H + +#ifdef __cplusplus +extern "C" { +#endif + +/** \defgroup spa_pod POD + * Binary data serialization format + */ + +/** + * \addtogroup spa_pod + * \{ + */ + +#include <stdarg.h> + +#include <spa/utils/hook.h> +#include <spa/pod/iter.h> +#include <spa/pod/vararg.h> + +struct spa_pod_builder_state { + uint32_t offset; +#define SPA_POD_BUILDER_FLAG_BODY (1<<0) +#define SPA_POD_BUILDER_FLAG_FIRST (1<<1) + uint32_t flags; + struct spa_pod_frame *frame; +}; + +struct spa_pod_builder; + +struct spa_pod_builder_callbacks { +#define SPA_VERSION_POD_BUILDER_CALLBACKS 0 + uint32_t version; + + int (*overflow) (void *data, uint32_t size); +}; + +struct spa_pod_builder { + void *data; + uint32_t size; + uint32_t _padding; + struct spa_pod_builder_state state; + struct spa_callbacks callbacks; +}; + +#define SPA_POD_BUILDER_INIT(buffer,size) (struct spa_pod_builder){ buffer, size, 0, {}, {} } + +static inline void +spa_pod_builder_get_state(struct spa_pod_builder *builder, struct spa_pod_builder_state *state) +{ + *state = builder->state; +} + +static inline void +spa_pod_builder_set_callbacks(struct spa_pod_builder *builder, + const struct spa_pod_builder_callbacks *callbacks, void *data) +{ + builder->callbacks = SPA_CALLBACKS_INIT(callbacks, data); +} + +static inline void +spa_pod_builder_reset(struct spa_pod_builder *builder, struct spa_pod_builder_state *state) +{ + struct spa_pod_frame *f; + uint32_t size = builder->state.offset - state->offset; + builder->state = *state; + for (f = builder->state.frame; f ; f = f->parent) + f->pod.size -= size; +} + +static inline void spa_pod_builder_init(struct spa_pod_builder *builder, void *data, uint32_t size) +{ + *builder = SPA_POD_BUILDER_INIT(data, size); +} + +static inline struct spa_pod * +spa_pod_builder_deref(struct spa_pod_builder *builder, uint32_t offset) +{ + uint32_t size = builder->size; + if (offset + 8 <= size) { + struct spa_pod *pod = SPA_PTROFF(builder->data, offset, struct spa_pod); + if (offset + SPA_POD_SIZE(pod) <= size) + return pod; + } + return NULL; +} + +static inline struct spa_pod * +spa_pod_builder_frame(struct spa_pod_builder *builder, struct spa_pod_frame *frame) +{ + if (frame->offset + SPA_POD_SIZE(&frame->pod) <= builder->size) + return SPA_PTROFF(builder->data, frame->offset, struct spa_pod); + return NULL; +} + +static inline void +spa_pod_builder_push(struct spa_pod_builder *builder, + struct spa_pod_frame *frame, + const struct spa_pod *pod, + uint32_t offset) +{ + frame->pod = *pod; + frame->offset = offset; + frame->parent = builder->state.frame; + frame->flags = builder->state.flags; + builder->state.frame = frame; + + if (frame->pod.type == SPA_TYPE_Array || frame->pod.type == SPA_TYPE_Choice) + builder->state.flags = SPA_POD_BUILDER_FLAG_FIRST | SPA_POD_BUILDER_FLAG_BODY; +} + +static inline int spa_pod_builder_raw(struct spa_pod_builder *builder, const void *data, uint32_t size) +{ + int res = 0; + struct spa_pod_frame *f; + uint32_t offset = builder->state.offset; + + if (offset + size > builder->size) { + res = -ENOSPC; + spa_callbacks_call_res(&builder->callbacks, struct spa_pod_builder_callbacks, res, + overflow, 0, offset + size); + } + if (res == 0 && data) + memcpy(SPA_PTROFF(builder->data, offset, void), data, size); + + builder->state.offset += size; + + for (f = builder->state.frame; f ; f = f->parent) + f->pod.size += size; + + return res; +} + +static inline int spa_pod_builder_pad(struct spa_pod_builder *builder, uint32_t size) +{ + uint64_t zeroes = 0; + size = SPA_ROUND_UP_N(size, 8) - size; + return size ? spa_pod_builder_raw(builder, &zeroes, size) : 0; +} + +static inline int +spa_pod_builder_raw_padded(struct spa_pod_builder *builder, const void *data, uint32_t size) +{ + int r, res = spa_pod_builder_raw(builder, data, size); + if ((r = spa_pod_builder_pad(builder, size)) < 0) + res = r; + return res; +} + +static inline void *spa_pod_builder_pop(struct spa_pod_builder *builder, struct spa_pod_frame *frame) +{ + struct spa_pod *pod; + + if (SPA_FLAG_IS_SET(builder->state.flags, SPA_POD_BUILDER_FLAG_FIRST)) { + const struct spa_pod p = { 0, SPA_TYPE_None }; + spa_pod_builder_raw(builder, &p, sizeof(p)); + } + if ((pod = (struct spa_pod*)spa_pod_builder_frame(builder, frame)) != NULL) + *pod = frame->pod; + + builder->state.frame = frame->parent; + builder->state.flags = frame->flags; + spa_pod_builder_pad(builder, builder->state.offset); + return pod; +} + +static inline int +spa_pod_builder_primitive(struct spa_pod_builder *builder, const struct spa_pod *p) +{ + const void *data; + uint32_t size; + int r, res; + + if (builder->state.flags == SPA_POD_BUILDER_FLAG_BODY) { + data = SPA_POD_BODY_CONST(p); + size = SPA_POD_BODY_SIZE(p); + } else { + data = p; + size = SPA_POD_SIZE(p); + SPA_FLAG_CLEAR(builder->state.flags, SPA_POD_BUILDER_FLAG_FIRST); + } + res = spa_pod_builder_raw(builder, data, size); + if (builder->state.flags != SPA_POD_BUILDER_FLAG_BODY) + if ((r = spa_pod_builder_pad(builder, size)) < 0) + res = r; + return res; +} + +#define SPA_POD_INIT(size,type) (struct spa_pod) { size, type } + +#define SPA_POD_INIT_None() SPA_POD_INIT(0, SPA_TYPE_None) + +static inline int spa_pod_builder_none(struct spa_pod_builder *builder) +{ + const struct spa_pod p = SPA_POD_INIT_None(); + return spa_pod_builder_primitive(builder, &p); +} + +static inline int spa_pod_builder_child(struct spa_pod_builder *builder, uint32_t size, uint32_t type) +{ + const struct spa_pod p = SPA_POD_INIT(size,type); + SPA_FLAG_CLEAR(builder->state.flags, SPA_POD_BUILDER_FLAG_FIRST); + return spa_pod_builder_raw(builder, &p, sizeof(p)); +} + +#define SPA_POD_INIT_Bool(val) (struct spa_pod_bool){ { sizeof(uint32_t), SPA_TYPE_Bool }, val ? 1 : 0, 0 } + +static inline int spa_pod_builder_bool(struct spa_pod_builder *builder, bool val) +{ + const struct spa_pod_bool p = SPA_POD_INIT_Bool(val); + return spa_pod_builder_primitive(builder, &p.pod); +} + +#define SPA_POD_INIT_Id(val) (struct spa_pod_id){ { sizeof(uint32_t), SPA_TYPE_Id }, (uint32_t)val, 0 } + +static inline int spa_pod_builder_id(struct spa_pod_builder *builder, uint32_t val) +{ + const struct spa_pod_id p = SPA_POD_INIT_Id(val); + return spa_pod_builder_primitive(builder, &p.pod); +} + +#define SPA_POD_INIT_Int(val) (struct spa_pod_int){ { sizeof(int32_t), SPA_TYPE_Int }, (int32_t)val, 0 } + +static inline int spa_pod_builder_int(struct spa_pod_builder *builder, int32_t val) +{ + const struct spa_pod_int p = SPA_POD_INIT_Int(val); + return spa_pod_builder_primitive(builder, &p.pod); +} + +#define SPA_POD_INIT_Long(val) (struct spa_pod_long){ { sizeof(int64_t), SPA_TYPE_Long }, (int64_t)val } + +static inline int spa_pod_builder_long(struct spa_pod_builder *builder, int64_t val) +{ + const struct spa_pod_long p = SPA_POD_INIT_Long(val); + return spa_pod_builder_primitive(builder, &p.pod); +} + +#define SPA_POD_INIT_Float(val) (struct spa_pod_float){ { sizeof(float), SPA_TYPE_Float }, val, 0 } + +static inline int spa_pod_builder_float(struct spa_pod_builder *builder, float val) +{ + const struct spa_pod_float p = SPA_POD_INIT_Float(val); + return spa_pod_builder_primitive(builder, &p.pod); +} + +#define SPA_POD_INIT_Double(val) (struct spa_pod_double){ { sizeof(double), SPA_TYPE_Double }, val } + +static inline int spa_pod_builder_double(struct spa_pod_builder *builder, double val) +{ + const struct spa_pod_double p = SPA_POD_INIT_Double(val); + return spa_pod_builder_primitive(builder, &p.pod); +} + +#define SPA_POD_INIT_String(len) (struct spa_pod_string){ { len, SPA_TYPE_String } } + +static inline int +spa_pod_builder_write_string(struct spa_pod_builder *builder, const char *str, uint32_t len) +{ + int r, res; + res = spa_pod_builder_raw(builder, str, len); + if ((r = spa_pod_builder_raw(builder, "", 1)) < 0) + res = r; + if ((r = spa_pod_builder_pad(builder, builder->state.offset)) < 0) + res = r; + return res; +} + +static inline int +spa_pod_builder_string_len(struct spa_pod_builder *builder, const char *str, uint32_t len) +{ + const struct spa_pod_string p = SPA_POD_INIT_String(len+1); + int r, res = spa_pod_builder_raw(builder, &p, sizeof(p)); + if ((r = spa_pod_builder_write_string(builder, str, len)) < 0) + res = r; + return res; +} + +static inline int spa_pod_builder_string(struct spa_pod_builder *builder, const char *str) +{ + uint32_t len = str ? strlen(str) : 0; + return spa_pod_builder_string_len(builder, str ? str : "", len); +} + +#define SPA_POD_INIT_Bytes(len) (struct spa_pod_bytes){ { len, SPA_TYPE_Bytes } } + +static inline int +spa_pod_builder_bytes(struct spa_pod_builder *builder, const void *bytes, uint32_t len) +{ + const struct spa_pod_bytes p = SPA_POD_INIT_Bytes(len); + int r, res = spa_pod_builder_raw(builder, &p, sizeof(p)); + if ((r = spa_pod_builder_raw_padded(builder, bytes, len)) < 0) + res = r; + return res; +} +static inline void * +spa_pod_builder_reserve_bytes(struct spa_pod_builder *builder, uint32_t len) +{ + uint32_t offset = builder->state.offset; + if (spa_pod_builder_bytes(builder, NULL, len) < 0) + return NULL; + return SPA_POD_BODY(spa_pod_builder_deref(builder, offset)); +} + +#define SPA_POD_INIT_Pointer(type,value) (struct spa_pod_pointer){ { sizeof(struct spa_pod_pointer_body), SPA_TYPE_Pointer }, { type, 0, value } } + +static inline int +spa_pod_builder_pointer(struct spa_pod_builder *builder, uint32_t type, const void *val) +{ + const struct spa_pod_pointer p = SPA_POD_INIT_Pointer(type, val); + return spa_pod_builder_primitive(builder, &p.pod); +} + +#define SPA_POD_INIT_Fd(fd) (struct spa_pod_fd){ { sizeof(int64_t), SPA_TYPE_Fd }, fd } + +static inline int spa_pod_builder_fd(struct spa_pod_builder *builder, int64_t fd) +{ + const struct spa_pod_fd p = SPA_POD_INIT_Fd(fd); + return spa_pod_builder_primitive(builder, &p.pod); +} + +#define SPA_POD_INIT_Rectangle(val) (struct spa_pod_rectangle){ { sizeof(struct spa_rectangle), SPA_TYPE_Rectangle }, val } + +static inline int +spa_pod_builder_rectangle(struct spa_pod_builder *builder, uint32_t width, uint32_t height) +{ + const struct spa_pod_rectangle p = SPA_POD_INIT_Rectangle(SPA_RECTANGLE(width, height)); + return spa_pod_builder_primitive(builder, &p.pod); +} + +#define SPA_POD_INIT_Fraction(val) (struct spa_pod_fraction){ { sizeof(struct spa_fraction), SPA_TYPE_Fraction }, val } + +static inline int +spa_pod_builder_fraction(struct spa_pod_builder *builder, uint32_t num, uint32_t denom) +{ + const struct spa_pod_fraction p = SPA_POD_INIT_Fraction(SPA_FRACTION(num, denom)); + return spa_pod_builder_primitive(builder, &p.pod); +} + +static inline int +spa_pod_builder_push_array(struct spa_pod_builder *builder, struct spa_pod_frame *frame) +{ + const struct spa_pod_array p = + { {sizeof(struct spa_pod_array_body) - sizeof(struct spa_pod), SPA_TYPE_Array}, + {{0, 0}} }; + uint32_t offset = builder->state.offset; + int res = spa_pod_builder_raw(builder, &p, sizeof(p) - sizeof(struct spa_pod)); + spa_pod_builder_push(builder, frame, &p.pod, offset); + return res; +} + +static inline int +spa_pod_builder_array(struct spa_pod_builder *builder, + uint32_t child_size, uint32_t child_type, uint32_t n_elems, const void *elems) +{ + const struct spa_pod_array p = { + {(uint32_t)(sizeof(struct spa_pod_array_body) + n_elems * child_size), SPA_TYPE_Array}, + {{child_size, child_type}} + }; + int r, res = spa_pod_builder_raw(builder, &p, sizeof(p)); + if ((r = spa_pod_builder_raw_padded(builder, elems, child_size * n_elems)) < 0) + res = r; + return res; +} + +#define SPA_POD_INIT_CHOICE_BODY(type, flags, child_size, child_type) \ + (struct spa_pod_choice_body) { type, flags, { child_size, child_type }} + +#define SPA_POD_INIT_Choice(type, ctype, child_type, n_vals, ...) \ + (struct { struct spa_pod_choice choice; ctype vals[n_vals];}) \ + { { { n_vals * sizeof(ctype) + sizeof(struct spa_pod_choice_body), SPA_TYPE_Choice }, \ + { type, 0, { sizeof(ctype), child_type } } }, { __VA_ARGS__ } } + +static inline int +spa_pod_builder_push_choice(struct spa_pod_builder *builder, struct spa_pod_frame *frame, + uint32_t type, uint32_t flags) +{ + const struct spa_pod_choice p = + { {sizeof(struct spa_pod_choice_body) - sizeof(struct spa_pod), SPA_TYPE_Choice}, + { type, flags, {0, 0}} }; + uint32_t offset = builder->state.offset; + int res = spa_pod_builder_raw(builder, &p, sizeof(p) - sizeof(struct spa_pod)); + spa_pod_builder_push(builder, frame, &p.pod, offset); + return res; +} + +#define SPA_POD_INIT_Struct(size) (struct spa_pod_struct){ { size, SPA_TYPE_Struct } } + +static inline int +spa_pod_builder_push_struct(struct spa_pod_builder *builder, struct spa_pod_frame *frame) +{ + const struct spa_pod_struct p = SPA_POD_INIT_Struct(0); + uint32_t offset = builder->state.offset; + int res = spa_pod_builder_raw(builder, &p, sizeof(p)); + spa_pod_builder_push(builder, frame, &p.pod, offset); + return res; +} + +#define SPA_POD_INIT_Object(size,type,id,...) (struct spa_pod_object){ { size, SPA_TYPE_Object }, { type, id }, ##__VA_ARGS__ } + +static inline int +spa_pod_builder_push_object(struct spa_pod_builder *builder, struct spa_pod_frame *frame, + uint32_t type, uint32_t id) +{ + const struct spa_pod_object p = + SPA_POD_INIT_Object(sizeof(struct spa_pod_object_body), type, id); + uint32_t offset = builder->state.offset; + int res = spa_pod_builder_raw(builder, &p, sizeof(p)); + spa_pod_builder_push(builder, frame, &p.pod, offset); + return res; +} + +#define SPA_POD_INIT_Prop(key,flags,size,type) \ + (struct spa_pod_prop){ key, flags, { size, type } } + +static inline int +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)); +} + +#define SPA_POD_INIT_Sequence(size,unit) \ + (struct spa_pod_sequence){ { size, SPA_TYPE_Sequence}, {unit, 0 } } + +static inline int +spa_pod_builder_push_sequence(struct spa_pod_builder *builder, struct spa_pod_frame *frame, uint32_t unit) +{ + const struct spa_pod_sequence p = + SPA_POD_INIT_Sequence(sizeof(struct spa_pod_sequence_body), unit); + uint32_t offset = builder->state.offset; + int res = spa_pod_builder_raw(builder, &p, sizeof(p)); + spa_pod_builder_push(builder, frame, &p.pod, offset); + return res; +} + +static inline uint32_t +spa_pod_builder_control(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)); +} + +static inline uint32_t spa_choice_from_id(char id) +{ + switch (id) { + case 'r': + return SPA_CHOICE_Range; + case 's': + return SPA_CHOICE_Step; + case 'e': + return SPA_CHOICE_Enum; + case 'f': + return SPA_CHOICE_Flags; + case 'n': + default: + return SPA_CHOICE_None; + } +} + +#define SPA_POD_BUILDER_COLLECT(builder,type,args) \ +do { \ + switch (type) { \ + case 'b': \ + spa_pod_builder_bool(builder, !!va_arg(args, int)); \ + break; \ + case 'I': \ + spa_pod_builder_id(builder, va_arg(args, uint32_t)); \ + break; \ + case 'i': \ + spa_pod_builder_int(builder, va_arg(args, int)); \ + break; \ + case 'l': \ + spa_pod_builder_long(builder, va_arg(args, int64_t)); \ + break; \ + case 'f': \ + spa_pod_builder_float(builder, va_arg(args, double)); \ + break; \ + case 'd': \ + spa_pod_builder_double(builder, va_arg(args, double)); \ + break; \ + case 's': \ + { \ + char *strval = va_arg(args, char *); \ + if (strval != NULL) { \ + size_t len = strlen(strval); \ + spa_pod_builder_string_len(builder, strval, len); \ + } \ + else \ + spa_pod_builder_none(builder); \ + break; \ + } \ + case 'S': \ + { \ + char *strval = va_arg(args, char *); \ + size_t len = va_arg(args, int); \ + spa_pod_builder_string_len(builder, strval, len); \ + break; \ + } \ + case 'y': \ + { \ + void *ptr = va_arg(args, void *); \ + int len = va_arg(args, int); \ + spa_pod_builder_bytes(builder, ptr, len); \ + break; \ + } \ + case 'R': \ + { \ + struct spa_rectangle *rectval = \ + va_arg(args, struct spa_rectangle *); \ + spa_pod_builder_rectangle(builder, \ + rectval->width, rectval->height); \ + break; \ + } \ + case 'F': \ + { \ + struct spa_fraction *fracval = \ + va_arg(args, struct spa_fraction *); \ + spa_pod_builder_fraction(builder, fracval->num, fracval->denom);\ + break; \ + } \ + case 'a': \ + { \ + int child_size = va_arg(args, int); \ + int child_type = va_arg(args, int); \ + int n_elems = va_arg(args, int); \ + void *elems = va_arg(args, void *); \ + spa_pod_builder_array(builder, child_size, \ + child_type, n_elems, elems); \ + break; \ + } \ + case 'p': \ + { \ + int t = va_arg(args, uint32_t); \ + spa_pod_builder_pointer(builder, t, va_arg(args, void *)); \ + break; \ + } \ + case 'h': \ + spa_pod_builder_fd(builder, va_arg(args, int)); \ + break; \ + case 'P': \ + case 'O': \ + case 'T': \ + case 'V': \ + { \ + struct spa_pod *pod = va_arg(args, struct spa_pod *); \ + if (pod == NULL) \ + spa_pod_builder_none(builder); \ + else \ + spa_pod_builder_primitive(builder, pod); \ + break; \ + } \ + } \ +} while(false) + +static inline int +spa_pod_builder_addv(struct spa_pod_builder *builder, va_list args) +{ + int res = 0; + struct spa_pod_frame *frame = builder->state.frame; + uint32_t ftype = frame ? frame->pod.type : (uint32_t)SPA_TYPE_None; + + do { + const char *format; + int n_values = 1; + struct spa_pod_frame f; + bool choice; + + switch (ftype) { + case SPA_TYPE_Object: + { + uint32_t key = va_arg(args, uint32_t); + if (key == 0) + goto exit; + spa_pod_builder_prop(builder, key, 0); + break; + } + case SPA_TYPE_Sequence: + { + uint32_t offset = va_arg(args, uint32_t); + uint32_t type = va_arg(args, uint32_t); + if (type == 0) + goto exit; + spa_pod_builder_control(builder, offset, type); + SPA_FALLTHROUGH + } + default: + break; + } + if ((format = va_arg(args, const char *)) == NULL) + break; + + choice = *format == '?'; + if (choice) { + uint32_t type = spa_choice_from_id(*++format); + if (*format != '\0') + format++; + + spa_pod_builder_push_choice(builder, &f, type, 0); + + n_values = va_arg(args, int); + } + while (n_values-- > 0) + SPA_POD_BUILDER_COLLECT(builder, *format, args); + + if (choice) + spa_pod_builder_pop(builder, &f); + } while (true); + + exit: + return res; +} + +static inline int spa_pod_builder_add(struct spa_pod_builder *builder, ...) +{ + int res; + va_list args; + + va_start(args, builder); + res = spa_pod_builder_addv(builder, args); + va_end(args); + + return res; +} + +#define spa_pod_builder_add_object(b,type,id,...) \ +({ \ + struct spa_pod_frame _f; \ + spa_pod_builder_push_object(b, &_f, type, id); \ + spa_pod_builder_add(b, ##__VA_ARGS__, 0); \ + spa_pod_builder_pop(b, &_f); \ +}) + +#define spa_pod_builder_add_struct(b,...) \ +({ \ + struct spa_pod_frame _f; \ + spa_pod_builder_push_struct(b, &_f); \ + spa_pod_builder_add(b, ##__VA_ARGS__, NULL); \ + spa_pod_builder_pop(b, &_f); \ +}) + +#define spa_pod_builder_add_sequence(b,unit,...) \ +({ \ + struct spa_pod_frame _f; \ + spa_pod_builder_push_sequence(b, &_f, unit); \ + spa_pod_builder_add(b, ##__VA_ARGS__, 0, 0); \ + spa_pod_builder_pop(b, &_f); \ +}) + +/** Copy a pod structure */ +static inline struct spa_pod * +spa_pod_copy(const struct spa_pod *pod) +{ + size_t size; + struct spa_pod *c; + + size = SPA_POD_SIZE(pod); + if ((c = (struct spa_pod *) malloc(size)) == NULL) + return NULL; + return (struct spa_pod *) memcpy(c, pod, size); +} + +/** + * \} + */ + +#ifdef __cplusplus +} /* extern "C" */ +#endif + +#endif /* SPA_POD_BUILDER_H */ |