From 96a32415ab43377cf1575bd3f4f2980f58028209 Mon Sep 17 00:00:00 2001
From: Determinant <ted.sybil@gmail.com>
Date: Fri, 14 Aug 2015 11:51:42 +0800
Subject: add implementation for kaldi io (by ymz)

---
 kaldi_io/src/init.c | 106 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 106 insertions(+)
 create mode 100644 kaldi_io/src/init.c

(limited to 'kaldi_io/src/init.c')

diff --git a/kaldi_io/src/init.c b/kaldi_io/src/init.c
new file mode 100644
index 0000000..413452c
--- /dev/null
+++ b/kaldi_io/src/init.c
@@ -0,0 +1,106 @@
+#include "nerv/common.h"
+#include "cwrapper_kaldi.h"
+#include <stdio.h>
+
+const char *nerv_kaldi_feat_repo_tname = "nerv.KaldiFeatureRepo";
+const char *nerv_kaldi_label_repo_tname = "nerv.KaldiLabelRepo";
+const char *nerv_matrix_host_float_tname = "nerv.MMatrixFloat";
+
+static int feat_repo_new(lua_State *L) {
+    const char *feature_rsepcifier = luaL_checkstring(L, 1);
+    KaldiFeatureRepo *repo = kaldi_feature_repo_new(feature_rsepcifier);
+    luaT_pushudata(L, repo, nerv_kaldi_feat_repo_tname);
+    return 1;
+}
+
+static int feat_repo_destroy(lua_State *L) {
+    KaldiFeatureRepo *repo = luaT_checkudata(L, 1, nerv_kaldi_feat_repo_tname);
+    kaldi_feature_repo_destroy(repo);
+    return 0;
+}
+
+static int feat_repo_current_utterance(lua_State *L) {
+    KaldiFeatureRepo *repo = luaT_checkudata(L, 1, nerv_kaldi_feat_repo_tname);
+    int debug;
+    if (!lua_isboolean(L, 2))
+        nerv_error(L, "debug flag should be a boolean");
+    debug = lua_toboolean(L, 2);
+    Matrix *utter = kaldi_feature_repo_read_utterance(repo, L, debug);
+    luaT_pushudata(L, utter, nerv_matrix_host_float_tname);
+    return 1;
+}
+
+static int feat_repo_next(lua_State *L) {
+    KaldiFeatureRepo *repo = luaT_checkudata(L, 1, nerv_kaldi_feat_repo_tname);
+    kaldi_feature_repo_next(repo);
+    return 0;
+}
+
+static int feat_repo_is_end(lua_State *L) {
+    KaldiFeatureRepo *repo = luaT_checkudata(L, 1, nerv_kaldi_feat_repo_tname);
+    lua_pushboolean(L, kaldi_feature_repo_is_end(repo));
+    return 1;
+}
+
+static const luaL_Reg feat_repo_methods[] = {
+    {"cur_utter", feat_repo_current_utterance},
+    {"next", feat_repo_next},
+    {"is_end", feat_repo_is_end},
+    {NULL, NULL}
+};
+
+static int label_repo_new(lua_State *L) {
+    const char *targets_rspecifier = luaL_checkstring(L, 1);
+    const char *fmt = luaL_checkstring(L, 2);
+    KaldiLabelRepo *repo = kaldi_label_repo_new(targets_rspecifier, fmt);
+    luaT_pushudata(L, repo, nerv_kaldi_label_repo_tname);
+    return 1;
+}
+
+static int label_repo_read_utterance(lua_State *L) {
+    KaldiLabelRepo *repo = luaT_checkudata(L, 1, nerv_kaldi_label_repo_tname);
+    KaldiFeatureRepo *feat_repo = luaT_checkudata(L, 2, nerv_kaldi_feat_repo_tname);
+    int frm_ext, nframes, debug;
+    if (!lua_isnumber(L, 3))
+        nerv_error(L, "frm_ext should be a number");
+    frm_ext = lua_tonumber(L, 3);
+    if (!lua_isnumber(L, 4))
+        nerv_error(L, "nframes should be a number");
+    nframes = lua_tonumber(L, 4);
+    if (!lua_isboolean(L, 5))
+        nerv_error(L, "debug flag should be a boolean");
+    debug = lua_toboolean(L, 5);
+    Matrix *utter = kaldi_label_repo_read_utterance(repo, feat_repo, frm_ext, nframes, L, debug);
+    luaT_pushudata(L, utter, nerv_matrix_host_float_tname);
+    return 1;
+}
+
+static int label_repo_destroy(lua_State *L) {
+    KaldiLabelRepo *repo = luaT_checkudata(L, 1, nerv_kaldi_label_repo_tname);
+    kaldi_label_repo_destroy(repo);
+    return 0;
+}
+
+static const luaL_Reg label_repo_methods[] = {
+    {"get_utter", label_repo_read_utterance},
+    {NULL, NULL}
+};
+
+static void feat_repo_init(lua_State *L) {
+    luaT_newmetatable(L, nerv_kaldi_feat_repo_tname, NULL,
+                        feat_repo_new, feat_repo_destroy, NULL);
+    luaL_register(L, NULL, feat_repo_methods);
+    lua_pop(L, 1);
+}
+
+static void label_repo_init(lua_State *L) {
+    luaT_newmetatable(L, nerv_kaldi_label_repo_tname, NULL,
+                        label_repo_new, label_repo_destroy, NULL);
+    luaL_register(L, NULL, label_repo_methods);
+    lua_pop(L, 1);
+}
+
+void kaldi_io_init(lua_State *L) {
+    feat_repo_init(L);
+    label_repo_init(L);
+}
-- 
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