From b7bc3f0d4488b6822506b9f93121249d078c38e3 Mon Sep 17 00:00:00 2001
From: dyknon <dyknon@r5f.jp>
Date: Sun, 11 Jan 2026 23:04:54 +0900
Subject: Rewritten: stop using ffmpeg. better flexibility about image size.

---
 ytdlsb-mpv.c | 102 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 102 insertions(+)
 create mode 100644 ytdlsb-mpv.c

(limited to 'ytdlsb-mpv.c')

diff --git a/ytdlsb-mpv.c b/ytdlsb-mpv.c
new file mode 100644
index 0000000..f5f7600
--- /dev/null
+++ b/ytdlsb-mpv.c
@@ -0,0 +1,102 @@
+#include "ytdlsb-mpv.h"
+#include "ytdlsb-utils.h"
+#include <stdio.h>
+#include <assert.h>
+
+int ytdlsb_mpv_overlay_add(mpv_handle *m,
+    int id, int x, int y,
+    char *buf, size_t off, size_t w, size_t h, size_t stride,
+    size_t dw, size_t dh
+){
+    char *command_keys[] = {
+        "name", "id", "x", "y",
+        "file", "offset", "fmt", "w", "h", "stride",
+        "dw", "dh",
+    };
+    char filename[32];  // enough for 64bit int + 1byte prefix
+    CKA(snprintf(filename, 32, "&%tu", (ptrdiff_t)((void *)buf - NULL)), < 32);
+    mpv_node command_vals[] = {
+        {
+            .format = MPV_FORMAT_STRING,
+            .u.string = "overlay-add",
+        }, {
+            .format = MPV_FORMAT_INT64,
+            .u.int64 = TRY_NUMCAST(a, int64_t, id),
+        }, {
+            .format = MPV_FORMAT_INT64,
+            .u.int64 = TRY_NUMCAST(a, int64_t, x),
+        }, {
+            .format = MPV_FORMAT_INT64,
+            .u.int64 = TRY_NUMCAST(a, int64_t, y),
+        }, {
+            .format = MPV_FORMAT_STRING,
+            .u.string = filename,
+        }, {
+            .format = MPV_FORMAT_INT64,
+            .u.int64 = TRY_NUMCAST(a, int64_t, off),
+        }, {
+            .format = MPV_FORMAT_STRING,
+            .u.string = "bgra",
+        }, {
+            .format = MPV_FORMAT_INT64,
+            .u.int64 = TRY_NUMCAST(a, int64_t, w),
+        }, {
+            .format = MPV_FORMAT_INT64,
+            .u.int64 = TRY_NUMCAST(a, int64_t, h),
+        }, {
+            .format = MPV_FORMAT_INT64,
+            .u.int64 = TRY_NUMCAST(a, int64_t, stride),
+        }, {
+            .format = MPV_FORMAT_INT64,
+            .u.int64 = TRY_NUMCAST(a, int64_t, dw),
+        }, {
+            .format = MPV_FORMAT_INT64,
+            .u.int64 = TRY_NUMCAST(a, int64_t, dh),
+        },
+    };
+    assert(sizeof(command_keys)/sizeof(command_keys[0])
+        == sizeof(command_vals)/sizeof(command_vals[0]));
+    mpv_node_list command_list = {
+        .num = sizeof(command_keys)/sizeof(command_keys[0]),
+        .values = command_vals,
+        .keys = command_keys,
+    };
+    mpv_node command = {
+        .format = MPV_FORMAT_NODE_MAP,
+        .u.list = &command_list,
+    };
+    CKM(err, mpv_command_node(m, &command, NULL));
+    return 0;
+a:
+    abort();
+err:
+    return -1;
+}
+
+int ytdlsb_mpv_overlay_remove(mpv_handle *m, int id){
+    char *command_keys[] = {"name", "id"};
+    mpv_node command_vals[] = {
+        {
+            .format = MPV_FORMAT_STRING,
+            .u.string = "overlay-remove",
+        }, {
+            .format = MPV_FORMAT_INT64,
+            .u.int64 = TRY_NUMCAST(a, int64_t, id),
+        },
+    };
+    assert(sizeof(command_keys)/sizeof(command_keys[0])
+        == sizeof(command_vals)/sizeof(command_vals[0]));
+    mpv_node_list command_list = {
+        .num = sizeof(command_keys)/sizeof(command_keys[0]),
+        .values = command_vals,
+        .keys = command_keys,
+    };
+    mpv_node command = {
+        .format = MPV_FORMAT_NODE_MAP,
+        .u.list = &command_list,
+    };
+    CKM(err, mpv_command_node(m, &command, NULL));
+    return 0;
+a:  abort();
+err: return -1;
+}
-- 
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