cross-platform CI with conan

.github/workflows/conan.yml

@@ -0,0 +1,104 @@
+name: Cross-platform build using conan
+
+on:
+  push:
+    branches: [ "**" ]
+  pull_request:
+    branches: [ "master" ]
+  schedule:
+    - cron: '34 5 * * 5'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  CMake:
+    runs-on: ${{ matrix.platform }}
+    strategy:
+      fail-fast: false
+      matrix:
+        platform: [ ubuntu-latest, macos-latest, windows-latest ]
+        ffmpeg: [ 8.0.1, 7.1.3, 6.1.1 ]
+
+    steps:
+      - name: Restart from scratch every Friday
+        run: gh cache delete --all
+        shell: bash
+        if: github.event_name == 'schedule'
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - uses: conan-io/setup-conan@v1
+      - uses: actions/checkout@v6
+        with:
+          submodules: true
+
+      - name: Get conan home
+        shell: bash
+        id: conan_home
+        run: echo path=`conan config home` >> $GITHUB_OUTPUT
+      - name: Cache conan artifacts
+        id: conan-artifacts
+        uses: actions/cache@v5
+        with:
+          path: ${{ steps.conan_home.outputs.path }}
+          key: conan-${{ matrix.platform }}-${{ matrix.ffmpeg}}-cmake
+
+      - run: conan profile detect --force
+      - run: conan install tests/conan -pr:a=tests/conan/conan.profile -b=missing -of build -o ffmpeg=${{ matrix.ffmpeg }} -o build=CMake
+
+      - name: Generate CMake build (Windows)
+        shell: cmd
+        run: |
+          call conanbuild.bat
+          call conanrun.bat
+          cmake -DCMAKE_BUILD_TYPE=Release ..
+        working-directory: ${{ github.workspace }}/build
+        if: runner.os == 'Windows'
+        env:
+          PKG_CONFIG_EXECUTABLE: pkgconf.exe
+          PKG_CONFIG_PATH: ${{ github.workspace }}/build
+
+      - name: Generate CMake build (Linux/macOS)
+        shell: bash
+        run: |
+          source conanbuild.sh
+          source conanrun.sh
+          cmake -DCMAKE_BUILD_TYPE=Release ..
+        working-directory: ${{ github.workspace }}/build
+        if: runner.os != 'Windows'
+        env:
+          PKG_CONFIG_PATH: ${{ github.workspace }}/build
+
+      - name: Build (Windows)
+        shell: cmd
+        run: |
+          call conanbuild.bat
+          call conanrun.bat
+          cmake --build .
+        if: runner.os == 'Windows'
+        working-directory: ${{ github.workspace }}/build
+
+      - name: Build (Linux/macOS)
+        run: |
+          source conanbuild.sh
+          source conanrun.sh
+          cmake --build .
+        if: runner.os != 'Windows'
+        working-directory: ${{ github.workspace }}/build
+
+      - name: Run the unit tests (Windows)
+        shell: cmd
+        run: |
+          call conanrun.bat
+          ctest --output-on-failure
+        if: runner.os == 'Windows'
+        working-directory: ${{ github.workspace }}/build
+
+      - name: Run the unit tests (Linux/macOS)
+        run: |
+          source conanrun.sh
+          ctest --output-on-failure
+        if: runner.os != 'Windows'
+        working-directory: ${{ github.workspace }}/build

example/api2-samples/CMakeLists.txt

@@ -23,11 +23,14 @@ set(TARGETS
   api2-dict-basic
   api2-timestamp
   api2-demux-seek
-  api2-remux
   api2-hw-encode
   api2-decode-raw-h264
 )
 
+if(NOT WIN32)
+  list(APPEND TARGETS api2-remux)
+endif()
+
 if (AV_DISABLE_AVFORMAT)
   list(REMOVE_ITEM TARGETS
     api2-decode

example/api2-samples/api2-decode-audio.cpp

@@ -31,7 +31,7 @@ int main(int argc, char **argv)
 
     string uri {argv[1]};
 
-    ssize_t      audioStream = -1;
+    long      audioStream = -1;
     AudioDecoderContext adec;
     Stream      ast;
     error_code   ec;

example/api2-samples/api2-decode-encode-audio.cpp

@@ -32,7 +32,7 @@ int main(int argc, char **argv)
     string uri (argv[1]);
     string out (argv[2]);
 
-    ssize_t      audioStream = -1;
+    long      audioStream = -1;
     AudioDecoderContext adec;
     Stream       ast;
     error_code   ec;

example/api2-samples/api2-decode-encode-video.cpp

@@ -38,7 +38,7 @@ int main(int argc, char **argv)
     // INPUT
     //
     FormatContext ictx;
-    ssize_t      videoStream = -1;
+    long      videoStream = -1;
     VideoDecoderContext vdec;
     Stream      vst;
 

example/api2-samples/api2-decode-filter-encode.cpp

@@ -39,7 +39,7 @@ int main(int argc, char **argv)
     string uri{argv[1]};
     string out{argv[2]};
 
-    ssize_t videoStream = -1;
+    long videoStream = -1;
     VideoDecoderContext vdec;
     Stream vst;
     error_code ec;

example/api2-samples/api2-decode-overlay-encode.cpp

@@ -42,7 +42,7 @@ int main(int argc, char **argv)
     // INPUT
     //
     FormatContext ictx;
-    ssize_t videoStream = -1;
+    long videoStream = -1;
     VideoDecoderContext vdec;
     Stream vst;
 
@@ -91,7 +91,7 @@ int main(int argc, char **argv)
     // STATIC IMAGE (more or less identical to INPUT)
     //
     FormatContext static_image_ctx;
-    ssize_t imageStream = -1;
+    long imageStream = -1;
     VideoDecoderContext static_image_dec;
     Stream image_st;
 

example/api2-samples/api2-decode-rasample-audio.cpp

@@ -31,7 +31,7 @@ int main(int argc, char **argv)
 
     string uri {argv[1]};
 
-    ssize_t      audioStream = -1;
+    long      audioStream = -1;
     AudioDecoderContext adec;
     Stream      ast;
     error_code   ec;

example/api2-samples/api2-decode.cpp

@@ -33,7 +33,7 @@ int main(int argc, char **argv)
 
     string uri {argv[1]};
 
-    ssize_t      videoStream = -1;
+    long      videoStream = -1;
     VideoDecoderContext vdec;
     Stream      vst;
     error_code   ec;

example/api2-samples/api2-dict-basic.cpp

@@ -1,4 +1,5 @@
 #include <iostream>
+#include <string>
 
 #include "avcpp/av.h"
 #include "avcpp/dictionary.h"

example/api2-samples/api2-hw-encode.cpp

@@ -86,7 +86,7 @@ int main(int argc, char **argv) {
     // INPUT
     //
     FormatContext ictx;
-    ssize_t videoStream = -1;
+    long videoStream = -1;
     // VideoDecoderContext vdec;
     Stream vst;
 

example/api2-samples/api2-scale-video.cpp

@@ -41,7 +41,7 @@ int main(int argc, char **argv)
     // INPUT
     //
     FormatContext ictx;
-    ssize_t      videoStream = -1;
+    long      videoStream = -1;
     VideoDecoderContext vdec;
     Stream      vst;
 

tests/FormatCustomIO_test.cpp

@@ -95,7 +95,7 @@ struct TestBufferIo : public av::CustomIO
             return _buffer.size();
         }
 
-        ssize_t cur = -1;
+        long cur = -1;
 
         if (whence == SEEK_CUR) {
             cur = std::distance(_buffer.begin(), _pos);
@@ -333,4 +333,4 @@ TEST_CASE("Format Custom IO checks", "[FormatCustomIo]")
     }
 }
 
-#endif
+#endif

tests/conan/conan.profile

@@ -0,0 +1,8 @@
+include(default)
+
+[conf]
+tools.system.package_manager:mode=install
+tools.system.package_manager:sudo=true
+
+[settings]
+compiler.cppstd=20

tests/conan/conanfile.py

@@ -0,0 +1,26 @@
+from conan import ConanFile
+
+required_conan_version = ">=2.0"
+
+class Avcpp(ConanFile):
+    settings = "os", "arch", "compiler", "build_type"
+    options = {
+        "ffmpeg": ["8.0.1", "7.1.3", "6.1.1"],
+        "build": [ "CMake", "meson" ]
+    }
+    default_options = {
+        "ffmpeg": "8.0.1",
+        "build": "CMake"
+    }
+    generators = 'PkgConfigDeps'
+
+    def requirements(self):
+      self.requires(f"ffmpeg/{self.options.ffmpeg}", transitive_headers=True)
+      if self.settings.os == 'Windows':
+         self.tool_requires("pkgconf/2.5.1")
+
+    def configure(self):
+      self.options["ffmpeg"].fPIC = True
+      self.options["ffmpeg"].shared = True
+      self.options["ffmpeg"].postproc = True
+