cuda: move --cuda-device to cuda_opts group

Also change a ta_free to talloc_free for consistency reasons.

options/options.c

@@ -363,6 +363,21 @@ const struct m_sub_options mp_osd_render_sub_opts = {
     .change_flags = UPDATE_OSD,
 };
 
+#undef OPT_BASE_STRUCT
+#define OPT_BASE_STRUCT struct cuda_opts
+
+const struct m_sub_options cuda_conf = {
+    .opts = (const struct m_option[]){
+        {"decode-device", OPT_CHOICE(cuda_device, {"auto", -1}),
+            M_RANGE(0, INT_MAX)},
+        {0}
+    },
+    .size = sizeof(struct cuda_opts),
+    .defaults = &(const struct cuda_opts){
+        .cuda_device = -1,
+    },
+};
+
 #undef OPT_BASE_STRUCT
 #define OPT_BASE_STRUCT struct dvd_opts
 
@@ -845,8 +860,7 @@ static const m_option_t mp_opts[] = {
 #endif
 
 #if HAVE_CUDA_HWACCEL
-    {"cuda-decode-device", OPT_CHOICE(cuda_device, {"auto", -1}),
+    {"cuda", OPT_SUBSTRUCT(cuda_opts, cuda_conf)},
-        M_RANGE(0, INT_MAX)},
 #endif
 
 #if HAVE_VAAPI

options/options.h

@@ -365,6 +365,7 @@ typedef struct MPOpts {
     struct drm_opts *drm_opts;
     struct wayland_opts *wayland_opts;
     struct wingl_opts *wingl_opts;
+    struct cuda_opts *cuda_opts;
     struct dvd_opts *dvd_opts;
     struct vaapi_opts *vaapi_opts;
     struct sws_opts *sws_opts;
@@ -373,6 +374,10 @@ typedef struct MPOpts {
     int cuda_device;
 } MPOpts;
 
+struct cuda_opts {
+    int cuda_device;
+};
+
 struct dvd_opts {
     int angle;
     int speed;
@@ -384,6 +389,7 @@ struct filter_opts {
 };
 
 extern const struct m_sub_options vo_sub_opts;
+extern const struct m_sub_options cuda_conf;
 extern const struct m_sub_options dvd_conf;
 extern const struct m_sub_options mp_subtitle_sub_opts;
 extern const struct m_sub_options mp_sub_filter_opts;

video/cuda.c

@@ -17,25 +17,24 @@
 
 #include "hwdec.h"
 #include "options/m_config.h"
+#include "options/options.h"
 
 #include <libavutil/hwcontext.h>
 
 static struct AVBufferRef *cuda_create_standalone(struct mpv_global *global,
         struct mp_log *log, struct hwcontext_create_dev_params *params)
 {
-    int decode_dev_idx;
+    struct cuda_opts *opts = mp_get_config_group(NULL, global, &cuda_conf);
-    mp_read_option_raw(global, "cuda-decode-device", &m_option_type_choice,
-                       &decode_dev_idx);
 
     char *decode_dev = NULL;
-    if (decode_dev_idx != -1) {
+    if (opts->cuda_device != -1)
-        decode_dev = talloc_asprintf(NULL, "%d", decode_dev_idx);
+        decode_dev = talloc_asprintf(NULL, "%d", opts->cuda_device);
-    }
 
     AVBufferRef* ref = NULL;
     av_hwdevice_ctx_create(&ref, AV_HWDEVICE_TYPE_CUDA, decode_dev, NULL, 0);
 
-    ta_free(decode_dev);
+    talloc_free(decode_dev);
+    talloc_free(opts);
     return ref;
 }
 

video/out/hwdec/hwdec_cuda_gl.c

@@ -19,6 +19,7 @@
 
 #include "hwdec_cuda.h"
 #include "options/m_config.h"
+#include "options/options.h"
 #include "video/out/opengl/formats.h"
 #include "video/out/opengl/ra_gl.h"
 
@@ -135,9 +136,9 @@ bool cuda_gl_init(const struct ra_hwdec *hw) {
 
     p->decode_ctx = p->display_ctx;
 
-    int decode_dev_idx = -1;
+    struct cuda_opts *opts = mp_get_config_group(NULL, hw->global, &cuda_conf);
-    mp_read_option_raw(hw->global, "cuda-decode-device", &m_option_type_choice,
+    int decode_dev_idx = opts->cuda_device;
-                       &decode_dev_idx);
+    talloc_free(opts);
 
     if (decode_dev_idx > -1) {
         CUcontext dummy;