first commit

2026-06-03 12:43:14 +08:00
commit ba76cfae28
608 changed files with 120791 additions and 0 deletions
--- a/nodes/ffio/ff_common.cpp
+++ b/nodes/ffio/ff_common.cpp
@@ -0,0 +1,55 @@
+
+#ifdef VP_WITH_FFMPEG
+#include "ff_common.h"
+
+namespace vp_nodes {
+    ff_scaler::ff_scaler(int src_width, 
+            int src_height, 
+            AVPixelFormat src_fmt, 
+            int dst_width, 
+            int dst_height,
+            AVPixelFormat dst_fmt):
+            m_src_width(src_width),
+            m_src_height(src_height),
+            m_src_fmt(src_fmt),
+            m_dst_width(dst_width),
+            m_dst_height(dst_height),
+            m_dst_fmt(dst_fmt) {
+        sws_ctx = sws_getContext(src_width, src_height, src_fmt, dst_width,dst_height, dst_fmt, SWS_FAST_BILINEAR, NULL, NULL, NULL);
+    }
+
+    ff_scaler::~ff_scaler() {
+        if (!sws_ctx) {
+            sws_freeContext(sws_ctx);
+        }
+    }
+
+    bool ff_scaler::scale(ff_av_frame_ptr src, ff_av_frame_ptr& dst) {
+        if (!sws_ctx || !src || !dst) {
+            return false;
+        }
+
+        if (src->format != m_src_fmt || src->width != m_src_width || src->height != m_src_height ||
+            dst->format != m_dst_fmt || dst->width != m_dst_width || dst->height != m_dst_height) {
+            return false;
+        }
+
+        if (dst->format == AV_PIX_FMT_BGR24) {
+            dst->linesize[0] = m_dst_width * 3;
+        }
+
+        /* allocate buffer if need for dst */
+        if (dst->data[0] == NULL) {
+            auto ret = av_frame_get_buffer(dst.get(), 0);
+            if (ret < 0) {
+                return false;
+            }
+        }
+        
+        auto ret = sws_scale(sws_ctx, src->data, src->linesize, 0, src->height, dst->data, dst->linesize);
+        dst->pts = src->pts;
+        dst->pkt_dts = src->pkt_dts;
+        return ret >= 0;
+    }
+}
+#endif