1 #include "x264_dynamic.h"
14 X264Dynamic load_x264_for_bit_depth(unsigned depth)
17 #if defined(X264_BIT_DEPTH) && X264_BIT_DEPTH == 0
18 bool suitable = true; // x264 compiled to support all bit depths.
19 #elif defined(X264_BIT_DEPTH)
20 bool suitable = X264_BIT_DEPTH >= depth;
22 bool suitable = unsigned(x264_bit_depth) >= depth;
25 // Just use the one we are linked to.
27 dyn.x264_encoder_close = x264_encoder_close;
28 dyn.x264_encoder_delayed_frames = x264_encoder_delayed_frames;
29 dyn.x264_encoder_encode = x264_encoder_encode;
30 dyn.x264_encoder_headers = x264_encoder_headers;
31 dyn.x264_encoder_open = x264_encoder_open;
32 dyn.x264_encoder_parameters = x264_encoder_parameters;
33 dyn.x264_encoder_reconfig = x264_encoder_reconfig;
34 dyn.x264_param_apply_profile = x264_param_apply_profile;
35 dyn.x264_param_default_preset = x264_param_default_preset;
36 dyn.x264_param_parse = x264_param_parse;
37 dyn.x264_picture_init = x264_picture_init;
41 // Uh-oh, our currently loaded library doesn't have the required support.
42 // Let's try to dynamically load a 10-bit version; in particular, Debian
43 // has a version in /usr/lib/x86_64-linux-gnu/x264-10bit/libx264.so.<soname>,
44 // so we try to figure out where our libx264 comes from, and modify that path.
45 string x264_dir, x264_suffix;
46 void *handle = dlopen(nullptr, RTLD_NOW);
48 int err = dlinfo(handle, RTLD_DI_LINKMAP, &m);
50 for ( ; m != nullptr; m = m->l_next) {
51 if (m->l_name == nullptr) {
54 const char *ptr = strstr(m->l_name, "/libx264.so.");
56 x264_dir = string(m->l_name, ptr - m->l_name);
57 x264_suffix = string(ptr, (m->l_name + strlen(m->l_name)) - ptr);
63 if (x264_dir.empty()) {
64 fprintf(stderr, "ERROR: Requested %d-bit x264, but is not linked to such an x264, and could not find one.\n",
69 string x264_10b_string = x264_dir + "/x264-10bit" + x264_suffix;
70 void *x264_dlhandle = dlopen(x264_10b_string.c_str(), RTLD_NOW);
71 if (x264_dlhandle == nullptr) {
72 fprintf(stderr, "ERROR: Requested %d-bit x264, but is not linked to such an x264, and %s would not load.\n",
73 depth, x264_10b_string.c_str());
77 dyn.handle = x264_dlhandle;
78 dyn.x264_encoder_close = (decltype(::x264_encoder_close) *)dlsym(x264_dlhandle, "x264_encoder_close");
79 dyn.x264_encoder_delayed_frames = (decltype(::x264_encoder_delayed_frames) *)dlsym(x264_dlhandle, "x264_encoder_delayed_frames");
80 dyn.x264_encoder_encode = (decltype(::x264_encoder_encode) *)dlsym(x264_dlhandle, "x264_encoder_encode");
81 dyn.x264_encoder_headers = (decltype(::x264_encoder_headers) *)dlsym(x264_dlhandle, "x264_encoder_headers");
82 char x264_encoder_open_symname[256];
83 snprintf(x264_encoder_open_symname, sizeof(x264_encoder_open_symname), "x264_encoder_open_%d", X264_BUILD);
84 dyn.x264_encoder_open = (decltype(::x264_encoder_open) *)dlsym(x264_dlhandle, x264_encoder_open_symname);
85 dyn.x264_encoder_parameters = (decltype(::x264_encoder_parameters) *)dlsym(x264_dlhandle, "x264_encoder_parameters");
86 dyn.x264_encoder_reconfig = (decltype(::x264_encoder_reconfig) *)dlsym(x264_dlhandle, "x264_encoder_reconfig");
87 dyn.x264_param_apply_profile = (decltype(::x264_param_apply_profile) *)dlsym(x264_dlhandle, "x264_param_apply_profile");
88 dyn.x264_param_default_preset = (decltype(::x264_param_default_preset) *)dlsym(x264_dlhandle, "x264_param_default_preset");
89 dyn.x264_param_parse = (decltype(::x264_param_parse) *)dlsym(x264_dlhandle, "x264_param_parse");
90 dyn.x264_picture_init = (decltype(::x264_picture_init) *)dlsym(x264_dlhandle, "x264_picture_init");