5 files changed, 144 insertions, 0 deletions
diff --git a/embedding_example/.gitignore b/embedding_example/.gitignore
new file mode 100644
index 0000000..8e68213
--- /dev/null
+++ b/embedding_example/.gitignore
@@ -0,0 +1,2 @@
+main
+main.o
diff --git a/embedding_example/Makefile b/embedding_example/Makefile
new file mode 100644
index 0000000..73287f4
--- /dev/null
+++ b/embedding_example/Makefile
@@ -0,0 +1,20 @@
+CFLAG += -I ../install/include/luajit-2.0/  -I ../install/include/nerv/
+LDFLAG += -L../install/lib/ -lluajit-5.1 -Wl,-rpath=../install/lib/ -lluaT -lnervcore
+GCC := gcc
+
+.PHONY: FORCE
+
+all: main FORCE
+clean:
+	-rm -f *.o
+	-rm main
+
+FORCE: ../install/bin/luarocks
+	echo "#!/bin/bash" > run.sh
+	$< path >> run.sh
+	echo "./main" >> run.sh
+main: main.o
+	$(GCC) -o $@ $<  $(LDFLAG)
+
+main.o: main.c
+	$(GCC) $(CFLAG) -o $@ $< -c
diff --git a/embedding_example/main.c b/embedding_example/main.c
new file mode 100644
index 0000000..8856d58
--- /dev/null
+++ b/embedding_example/main.c
@@ -0,0 +1,93 @@
+#include "lua.h"
+#include "lauxlib.h"
+#include "lualib.h"
+#include "matrix/matrix.h"
+#include "common.h"
+#include "luaT/luaT.h"
+#include <stdio.h>
+
+const char *nerv_matrix_host_float_tname = "nerv.MMatrixFloat";
+const char *input_name = "_nerv_embed_input";
+const char *output_name = "_nerv_embed_output";
+extern Matrix *nerv_matrix_host_float_create(long nrow, long ncol, Status *status);
+extern void nerv_matrix_host_float_data_retain(Matrix *self);
+extern void nerv_matrix_host_float_data_free(Matrix *self, Status *status);
+
+lua_State *L;
+Matrix *input, *output;
+Status status;
+
+void setup_nerv() {
+    L = lua_open();
+    luaL_openlibs(L);
+    luaL_loadfile(L, "setup_nerv.lua");
+    /* network configuration */
+    lua_pushstring(L, "../nerv/examples/swb_baseline.lua");
+    if (lua_pcall(L, 1, LUA_MULTRET, 0))
+    {
+        printf("%s\n", luaL_checkstring(L, 1));
+        exit(1);
+    }
+    /* lua stack now: input width, output width, propagator */
+    input = nerv_matrix_host_float_create(1, luaL_checkinteger(L, 1), &status);
+    NERV_LUA_CHECK_STATUS(L, status);
+    output = nerv_matrix_host_float_create(1, luaL_checkinteger(L, 2), &status);
+    NERV_LUA_CHECK_STATUS(L, status);
+    /* add reference to avoid gc */
+    luaT_pushudata(L, output, nerv_matrix_host_float_tname);
+    luaT_pushudata(L, input, nerv_matrix_host_float_tname);
+    lua_setfield(L, LUA_GLOBALSINDEX, input_name);
+    lua_setfield(L, LUA_GLOBALSINDEX, output_name);
+}
+
+
+void propagate(float for_fun) {
+    int i, j;
+    printf("ok: %d\n", lua_gettop(L));
+    lua_pushvalue(L, 3);
+    /* lua stack now: input width, output width, propagator, propagator */
+    for (i = 0; i < input->nrow; i++) /* nrow is actually 1 */
+    {
+        float *nerv_row = (float *)((char *)input->data.f + i * input->stride);
+        for (j = 0; j < input->ncol; j++)
+        {
+            nerv_row[j] = j * for_fun;
+        }
+    }
+    lua_getfield(L, LUA_GLOBALSINDEX, input_name);
+    lua_getfield(L, LUA_GLOBALSINDEX, output_name);
+    /* lua stack now: input width, output width, propagator, propagator, input, output */
+    if (lua_pcall(L, 2, 0, 0)) /* call propagator with two parameters */
+    {
+        printf("%s\n", luaL_checkstring(L, -1));
+        exit(-1);
+    }
+    /* lua stack now: input width, output width, propagator */
+    printf("## output: %ld %ld ##\n", output->nrow, output->ncol);
+    for (i = 0; i < output->nrow; i++) /* nrow is actually 1 */
+    {
+        float *nerv_row = (float *)((char *)output->data.f + i * output->stride);
+        for (j = 0; j < output->ncol; j++)
+        {
+            printf("%.8f ", nerv_row[j]);
+        }
+    }
+}
+
+void teardown_nerv() {
+    lua_pushnil(L);
+    lua_pushnil(L);
+    lua_setfield(L, LUA_GLOBALSINDEX, input_name);
+    lua_setfield(L, LUA_GLOBALSINDEX, output_name);
+    lua_gc(L, LUA_GCCOLLECT, 0);
+}
+
+int main() {
+    setup_nerv();
+    propagate(1.0);
+    propagate(2.0);
+    propagate(2.0);
+    propagate(3.0);
+    teardown_nerv();
+    return 0;
+}
diff --git a/embedding_example/run.sh b/embedding_example/run.sh
new file mode 100755
index 0000000..e919263
--- /dev/null
+++ b/embedding_example/run.sh
@@ -0,0 +1,4 @@
+#!/bin/bash
+export LUA_PATH='/home/slhome/mfy43/.luarocks/share/lua/5.1/?.lua;/home/slhome/mfy43/.luarocks/share/lua/5.1/?/init.lua;/home/slhome/mfy43/nerv/install/share/lua/5.1/?.lua;/home/slhome/mfy43/nerv/install/share/lua/5.1/?/init.lua;./?.lua;/usr/local/share/luajit-2.0.4/?.lua;/usr/local/share/lua/5.1/?.lua;/usr/local/share/lua/5.1/?/init.lua'
+export LUA_CPATH='/home/slhome/mfy43/.luarocks/lib/lua/5.1/?.so;/home/slhome/mfy43/nerv/install/lib/lua/5.1/?.so;./?.so;/usr/local/lib/lua/5.1/?.so;/usr/local/lib/lua/5.1/loadall.so'
+./main
diff --git a/embedding_example/setup_nerv.lua b/embedding_example/setup_nerv.lua
new file mode 100644
index 0000000..d80c306
--- /dev/null
+++ b/embedding_example/setup_nerv.lua
@@ -0,0 +1,25 @@
+local k,l,_=pcall(require,"luarocks.loader") _=k and l.add_context("nerv","scm-1")
+require 'nerv'
+local arg = {...}
+dofile(arg[1])
+local param_repo = nerv.ParamRepo()
+param_repo:import(gconf.initialized_param, nil, gconf)
+local layer_repo = make_layer_repo(param_repo)
+local network = get_decode_network(layer_repo)
+local global_transf = get_global_transf(layer_repo)
+local batch_size = 1
+network:init(batch_size)
+
+function propagator(input, output)
+    local transformed = nerv.speech_utils.global_transf(
+                            gconf.cumat_type.new_from_host(input),
+                            global_transf, 0, 0, gconf) -- preprocessing
+    local gpu_input = transformed
+    local gpu_output = nerv.CuMatrixFloat(output:nrow(), output:ncol())
+    network:propagate({gpu_input}, {gpu_output})
+    gpu_output:copy_toh(output)
+    -- collect garbage in-time to save GPU memory
+    collectgarbage("collect")
+end
+
+return network.dim_in[1], network.dim_out[1], propagator