[vlc-commits] Add an imem/libvlc_media_new_callbacks example

[Hugo Beauzée-Luyssen]

libvlcpp | branch: master | Hugo Beauzée-Luyssen <hugo at beauzee.fr> | Wed May 13 18:34:37 2015 +0200| [a9da24aa387eeef8302f27b7aa680ef9c5ebd967] | committer: Hugo Beauzée-Luyssen

Add an imem/libvlc_media_new_callbacks example

> http://git.videolan.org/gitweb.cgi/libvlcpp.git/?a=commit;h=a9da24aa387eeef8302f27b7aa680ef9c5ebd967
---

 examples/CMakeLists.txt      |    1 +
 examples/imem/CMakeLists.txt |    6 +++
 examples/imem/imem.cpp       |   86 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 93 insertions(+)

diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt
index 122fa9a..30eab5f 100644
--- a/examples/CMakeLists.txt
+++ b/examples/CMakeLists.txt
@@ -1 +1,2 @@
 subdirs(helloworld)
+subdirs(imem)
diff --git a/examples/imem/CMakeLists.txt b/examples/imem/CMakeLists.txt
new file mode 100644
index 0000000..b0a33f1
--- /dev/null
+++ b/examples/imem/CMakeLists.txt
@@ -0,0 +1,6 @@
+project(imem)
+
+add_executable(${PROJECT_NAME}
+    imem.cpp
+)
+target_link_libraries( ${PROJECT_NAME} ${LIBVLC_LIBRARY} ${LIBVLCCORE_LIBRARY} )
diff --git a/examples/imem/imem.cpp b/examples/imem/imem.cpp
new file mode 100644
index 0000000..21c1f82
--- /dev/null
+++ b/examples/imem/imem.cpp
@@ -0,0 +1,86 @@
+#include "vlcpp/vlc.hpp"
+#include <thread>
+#include <cstring>
+#include <cstdio>
+#include <iostream>
+
+struct ImemOpaque
+{
+    FILE* file;
+    std::string path;
+};
+
+int main(int ac, char**av)
+{
+    if (ac < 3)
+    {
+        std::cerr << "usage: " << av[0] << " <file to play> <another file to play>" << std::endl;
+        return 1;
+    }
+    auto instance = VLC::Instance(0, nullptr);
+    auto dummyOpaque = new ImemOpaque{};
+    dummyOpaque->path = av[1];
+    auto imemMedia = VLC::Media( instance,
+        // Open
+        [dummyOpaque]( void*, void** opaque, uint64_t* p_size ) -> int {
+            dummyOpaque->file = fopen( dummyOpaque->path.c_str(), "rb" );
+            *opaque = dummyOpaque;
+            fseek(dummyOpaque->file, 0, SEEK_END);
+            *p_size = ftell( dummyOpaque->file );
+            rewind( dummyOpaque->file );
+            return 0;
+        },
+        // Read:
+        []( void* opaque, unsigned char* buf, size_t size ) -> ssize_t {
+            auto context = reinterpret_cast<ImemOpaque*>( opaque );
+            auto res = fread( buf, 1, size, context->file );
+            if ( res == 0 )
+                return feof( context->file ) != 0 ? 0 : -1;
+            return res;
+        },
+        []( void* opaque, uint64_t seek ) -> int {
+            auto context = reinterpret_cast<ImemOpaque*>( opaque );
+            if ( fseek( context->file, seek, SEEK_SET ) < 0 )
+                return -1;
+            return 0;
+        },
+        []( void* opaque ) {
+            auto context = reinterpret_cast<ImemOpaque*>( opaque );
+            fclose( context->file );
+        });
+
+    auto opaque2 = new ImemOpaque{};
+    opaque2->file = fopen( av[2], "rb" );
+
+    // Do not use a user defined opaque
+    // This is mostly meant to test that our nullptr overload are functionnal
+    auto imemMedia2 = VLC::Media( instance,
+        nullptr,
+        [opaque2]( void* opaque, unsigned char* buf, size_t size ) -> ssize_t {
+            assert( opaque == nullptr );
+            auto res = fread( buf, 1, size, opaque2->file );
+            if ( res == 0 )
+                return feof( opaque2->file ) != 0 ? 0 : -1;
+            return res;
+        },
+        [opaque2]( void*, uint64_t offset ) {
+            if ( fseek( opaque2->file, offset, SEEK_CUR ) < -1 )
+                return -1;
+            return 0;
+        }, nullptr );
+
+    auto mp = VLC::MediaPlayer( imemMedia );
+    mp.play();
+
+    auto mp2 = VLC::MediaPlayer( imemMedia2 );
+    mp2.play();
+
+    std::this_thread::sleep_for( std::chrono::seconds( 10 ) );
+
+    mp.stop();
+    mp2.stop();
+
+    delete dummyOpaque;
+    fclose(opaque2->file);
+    delete opaque2;
+}