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client API: remove deprecated qthelper.hpp header 

No replacement. Qt or C++ code has no business in this repository, and
new code (even if it uses Qt) should not use it. Get rid of it.

We consider the libmpv API itself as stable. Symbols can be deprecated,
but not be removed. However, qthelper.hpp was never considered part of
the libmpv API. There no ABI implications either, since it's a header-
only implementation that uses C API symbols only. It's just a header
provided for convenience for Qt/C++ programs (i.e. extremely limited
usefulness).
This commit is contained in:
wm4 2020-03-06 19:37:44 +01:00
parent 2337fa4e02
commit 575197ff8b
3 changed files with 11 additions and 387 deletions
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10
DOCS/client-api-changes.rst
View File

@ -32,6 +32,16 @@ API changes
::
--- mpv 0.33.0 ---
1.107 - Remove the deprecated qthelper.hpp. This was obviously not part of the
libmpv API, only an "additionally" provided helper, thus this is not
considered an API change. If you are maintaining a project that relies
on this header, you can simply download this file and adjust the
include statement to use it instead:
https://raw.githubusercontent.com/mpv-player/mpv/v0.32.0/libmpv/qthelper.hpp
It is a good idea to write better wrappers for your use, though.
--- mpv 0.31.0 ---
1.107 - Deprecate MPV_EVENT_TICK

386
libmpv/qthelper.hpp
View File

@ -1,386 +0,0 @@
/* Copyright (C) 2017 the mpv developers
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef MPV_CLIENT_API_QTHELPER_H_
#define MPV_CLIENT_API_QTHELPER_H_
#include <mpv/client.h>
#if !MPV_ENABLE_DEPRECATED
#error "This helper is deprecated. Copy it into your project instead."
#else
/**
* Note: these helpers are provided for convenience for C++/Qt applications.
* This is based on the public API in client.h, and it does not encode any
* knowledge that is not known or guaranteed outside of the C client API. You
* can even copy and modify this code as you like, or implement similar things
* for other languages.
*/
#include <cstring>
#include <QVariant>
#include <QString>
#include <QList>
#include <QHash>
#include <QSharedPointer>
#include <QMetaType>
namespace mpv {
namespace qt {
// Wrapper around mpv_handle. Does refcounting under the hood.
class Handle
{
struct container {
container(mpv_handle *h) : mpv(h) {}
~container() { mpv_terminate_destroy(mpv); }
mpv_handle *mpv;
};
QSharedPointer<container> sptr;
public:
// Construct a new Handle from a raw mpv_handle with refcount 1. If the
// last Handle goes out of scope, the mpv_handle will be destroyed with
// mpv_terminate_destroy().
// Never destroy the mpv_handle manually when using this wrapper. You
// will create dangling pointers. Just let the wrapper take care of
// destroying the mpv_handle.
// Never create multiple wrappers from the same raw mpv_handle; copy the
// wrapper instead (that's what it's for).
static Handle FromRawHandle(mpv_handle *handle) {
Handle h;
h.sptr = QSharedPointer<container>(new container(handle));
return h;
}
// Return the raw handle; for use with the libmpv C API.
operator mpv_handle*() const { return sptr ? (*sptr).mpv : 0; }
};
static inline QVariant node_to_variant(const mpv_node *node)
{
switch (node->format) {
case MPV_FORMAT_STRING:
return QVariant(QString::fromUtf8(node->u.string));
case MPV_FORMAT_FLAG:
return QVariant(static_cast<bool>(node->u.flag));
case MPV_FORMAT_INT64:
return QVariant(static_cast<qlonglong>(node->u.int64));
case MPV_FORMAT_DOUBLE:
return QVariant(node->u.double_);
case MPV_FORMAT_NODE_ARRAY: {
mpv_node_list *list = node->u.list;
QVariantList qlist;
for (int n = 0; n < list->num; n++)
qlist.append(node_to_variant(&list->values[n]));
return QVariant(qlist);
}
case MPV_FORMAT_NODE_MAP: {
mpv_node_list *list = node->u.list;
QVariantMap qmap;
for (int n = 0; n < list->num; n++) {
qmap.insert(QString::fromUtf8(list->keys[n]),
node_to_variant(&list->values[n]));
}
return QVariant(qmap);
}
default: // MPV_FORMAT_NONE, unknown values (e.g. future extensions)
return QVariant();
}
}
struct node_builder {
node_builder(const QVariant& v) {
set(&node_, v);
}
~node_builder() {
free_node(&node_);
}
mpv_node *node() { return &node_; }
private:
Q_DISABLE_COPY(node_builder)
mpv_node node_;
mpv_node_list *create_list(mpv_node *dst, bool is_map, int num) {
dst->format = is_map ? MPV_FORMAT_NODE_MAP : MPV_FORMAT_NODE_ARRAY;
mpv_node_list *list = new mpv_node_list();
dst->u.list = list;
if (!list)
goto err;
list->values = new mpv_node[num]();
if (!list->values)
goto err;
if (is_map) {
list->keys = new char*[num]();
if (!list->keys)
goto err;
}
return list;
err:
free_node(dst);
return NULL;
}
char *dup_qstring(const QString &s) {
QByteArray b = s.toUtf8();
char *r = new char[b.size() + 1];
if (r)
std::memcpy(r, b.data(), b.size() + 1);
return r;
}
bool test_type(const QVariant &v, QMetaType::Type t) {
// The Qt docs say: "Although this function is declared as returning
// "QVariant::Type(obsolete), the return value should be interpreted
// as QMetaType::Type."
// So a cast really seems to be needed to avoid warnings (urgh).
return static_cast<int>(v.type()) == static_cast<int>(t);
}
void set(mpv_node *dst, const QVariant &src) {
if (test_type(src, QMetaType::QString)) {
dst->format = MPV_FORMAT_STRING;
dst->u.string = dup_qstring(src.toString());
if (!dst->u.string)
goto fail;
} else if (test_type(src, QMetaType::Bool)) {
dst->format = MPV_FORMAT_FLAG;
dst->u.flag = src.toBool() ? 1 : 0;
} else if (test_type(src, QMetaType::Int) ||
test_type(src, QMetaType::LongLong) ||
test_type(src, QMetaType::UInt) ||
test_type(src, QMetaType::ULongLong))
{
dst->format = MPV_FORMAT_INT64;
dst->u.int64 = src.toLongLong();
} else if (test_type(src, QMetaType::Double)) {
dst->format = MPV_FORMAT_DOUBLE;
dst->u.double_ = src.toDouble();
} else if (src.canConvert<QVariantList>()) {
QVariantList qlist = src.toList();
mpv_node_list *list = create_list(dst, false, qlist.size());
if (!list)
goto fail;
list->num = qlist.size();
for (int n = 0; n < qlist.size(); n++)
set(&list->values[n], qlist[n]);
} else if (src.canConvert<QVariantMap>()) {
QVariantMap qmap = src.toMap();
mpv_node_list *list = create_list(dst, true, qmap.size());
if (!list)
goto fail;
list->num = qmap.size();
for (int n = 0; n < qmap.size(); n++) {
list->keys[n] = dup_qstring(qmap.keys()[n]);
if (!list->keys[n]) {
free_node(dst);
goto fail;
}
set(&list->values[n], qmap.values()[n]);
}
} else {
goto fail;
}
return;
fail:
dst->format = MPV_FORMAT_NONE;
}
void free_node(mpv_node *dst) {
switch (dst->format) {
case MPV_FORMAT_STRING:
delete[] dst->u.string;
break;
case MPV_FORMAT_NODE_ARRAY:
case MPV_FORMAT_NODE_MAP: {
mpv_node_list *list = dst->u.list;
if (list) {
for (int n = 0; n < list->num; n++) {
if (list->keys)
delete[] list->keys[n];
if (list->values)
free_node(&list->values[n]);
}
delete[] list->keys;
delete[] list->values;
}
delete list;
break;
}
default: ;
}
dst->format = MPV_FORMAT_NONE;
}
};
/**
* RAII wrapper that calls mpv_free_node_contents() on the pointer.
*/
struct node_autofree {
mpv_node *ptr;
node_autofree(mpv_node *a_ptr) : ptr(a_ptr) {}
~node_autofree() { mpv_free_node_contents(ptr); }
};
#if MPV_ENABLE_DEPRECATED
/**
* Return the given property as mpv_node converted to QVariant, or QVariant()
* on error.
*
* @deprecated use get_property() instead
*
* @param name the property name
*/
static inline QVariant get_property_variant(mpv_handle *ctx, const QString &name)
{
mpv_node node;
if (mpv_get_property(ctx, name.toUtf8().data(), MPV_FORMAT_NODE, &node) < 0)
return QVariant();
node_autofree f(&node);
return node_to_variant(&node);
}
/**
* Set the given property as mpv_node converted from the QVariant argument.
* @deprecated use set_property() instead
*/
static inline int set_property_variant(mpv_handle *ctx, const QString &name,
const QVariant &v)
{
node_builder node(v);
return mpv_set_property(ctx, name.toUtf8().data(), MPV_FORMAT_NODE, node.node());
}
/**
* Set the given option as mpv_node converted from the QVariant argument.
*
* @deprecated use set_property() instead
*/
static inline int set_option_variant(mpv_handle *ctx, const QString &name,
const QVariant &v)
{
node_builder node(v);
return mpv_set_option(ctx, name.toUtf8().data(), MPV_FORMAT_NODE, node.node());
}
/**
* mpv_command_node() equivalent. Returns QVariant() on error (and
* unfortunately, the same on success).
*
* @deprecated use command() instead
*/
static inline QVariant command_variant(mpv_handle *ctx, const QVariant &args)
{
node_builder node(args);
mpv_node res;
if (mpv_command_node(ctx, node.node(), &res) < 0)
return QVariant();
node_autofree f(&res);
return node_to_variant(&res);
}
#endif
/**
* This is used to return error codes wrapped in QVariant for functions which
* return QVariant.
*
* You can use get_error() or is_error() to extract the error status from a
* QVariant value.
*/
struct ErrorReturn
{
/**
* enum mpv_error value (or a value outside of it if ABI was extended)
*/
int error;
ErrorReturn() : error(0) {}
explicit ErrorReturn(int err) : error(err) {}
};
/**
* Return the mpv error code packed into a QVariant, or 0 (success) if it's not
* an error value.
*
* @return error code (<0) or success (>=0)
*/
static inline int get_error(const QVariant &v)
{
if (!v.canConvert<ErrorReturn>())
return 0;
return v.value<ErrorReturn>().error;
}
/**
* Return whether the QVariant carries a mpv error code.
*/
static inline bool is_error(const QVariant &v)
{
return get_error(v) < 0;
}
/**
* Return the given property as mpv_node converted to QVariant, or QVariant()
* on error.
*
* @param name the property name
* @return the property value, or an ErrorReturn with the error code
*/
static inline QVariant get_property(mpv_handle *ctx, const QString &name)
{
mpv_node node;
int err = mpv_get_property(ctx, name.toUtf8().data(), MPV_FORMAT_NODE, &node);
if (err < 0)
return QVariant::fromValue(ErrorReturn(err));
node_autofree f(&node);
return node_to_variant(&node);
}
/**
* Set the given property as mpv_node converted from the QVariant argument.
*
* @return mpv error code (<0 on error, >= 0 on success)
*/
static inline int set_property(mpv_handle *ctx, const QString &name,
const QVariant &v)
{
node_builder node(v);
return mpv_set_property(ctx, name.toUtf8().data(), MPV_FORMAT_NODE, node.node());
}
/**
* mpv_command_node() equivalent.
*
* @param args command arguments, with args[0] being the command name as string
* @return the property value, or an ErrorReturn with the error code
*/
static inline QVariant command(mpv_handle *ctx, const QVariant &args)
{
node_builder node(args);
mpv_node res;
int err = mpv_command_node(ctx, node.node(), &res);
if (err < 0)
return QVariant::fromValue(ErrorReturn(err));
node_autofree f(&res);
return node_to_variant(&res);
}
}
}
Q_DECLARE_METATYPE(mpv::qt::ErrorReturn)
#endif /* else #if MPV_ENABLE_DEPRECATED */
#endif

2
wscript_build.py
View File

@ -718,7 +718,7 @@ def build(ctx):
PRIV_LIBS = get_deps(),
)
headers = ["client.h", "qthelper.hpp", "opengl_cb.h", "render.h",
headers = ["client.h", "opengl_cb.h", "render.h",
"render_gl.h", "stream_cb.h"]
for f in headers:
ctx.install_as(ctx.env.INCLUDEDIR + '/mpv/' + f, 'libmpv/' + f)