The Omega Update(TM) Part 3 (Rendering)

src/ffmpeg.cpp

@@ -0,0 +1,60 @@
+#include "ffmpeg.h"
+
+bool 
+ffmpeg_render
+(
+    const std::string& ffmpegPath, 
+    const std::string& outputPath, 
+    const std::vector<Texture>& frames,
+    ivec2 size, 
+    s32 fps,
+    enum RenderType type
+)
+{
+    if (frames.empty() || size.x <= 0 || size.y <= 0 || fps <= 0 || ffmpegPath.empty() || outputPath.empty()) return false;
+ 
+    std::string command{};
+
+    switch (type)
+    {
+        case RENDER_GIF:
+            command = std::format(FFMPEG_GIF_FORMAT, ffmpegPath, size.x, size.y, fps, outputPath);
+            break;
+        case RENDER_WEBM:
+            command = std::format(FFMPEG_WEBM_FORMAT, ffmpegPath, size.x, size.y, fps, outputPath);
+            break;
+        default:
+            return false;
+    }
+
+    FILE* fp = POPEN(command.c_str(), PWRITE_MODE);
+
+    if (!fp) 
+    {
+        log_info(std::format(FFMPEG_POPEN_ERROR, strerror(errno)));
+        return false;
+    }
+
+    size_t frameBytes = size.x * size.y * TEXTURE_CHANNELS;
+
+    for (const auto& frame : frames) 
+    {
+        std::vector<u8> rgba = texture_download(&frame);
+
+        if (rgba.size() != frameBytes) 
+        { 
+            PCLOSE(fp);
+            return false; 
+        }
+
+        if (fwrite(rgba.data(), 1, frameBytes, fp) != frameBytes) 
+        {
+            PCLOSE(fp);
+            return false;
+        }
+    }
+
+    const int code = PCLOSE(fp);
+
+    return (code == 0);
+}