From b61e94ed3cdf01fb850b07d6aa3a5780e4401463 Mon Sep 17 00:00:00 2001
From: bnnm <bananaman255@gmail.com>
Date: Sun, 15 May 2022 12:23:01 +0200
Subject: [PATCH] Fix some .tun [NBA Inside Drive 2000 (PC)]

---
 src/formats.c   |  2 +-
 src/meta/meta.h |  2 +-
 src/meta/tun.c  | 30 +++++++++++++++++++++---------
 src/vgmstream.c |  2 +-
 src/vgmstream.h |  2 +-
 5 files changed, 25 insertions(+), 13 deletions(-)

diff --git a/src/formats.c b/src/formats.c
index d231c8ca..9cac65d9 100644
--- a/src/formats.c
+++ b/src/formats.c
@@ -1205,7 +1205,7 @@ static const meta_info meta_info_list[] = {
         {meta_MTAF,                 "Konami MTAF header"},
         {meta_PS2_VAG1,             "Konami VAG1 header"},
         {meta_PS2_VAG2,             "Konami VAG2 header"},
-        {meta_TUN,                  "Lego Racers ALP header"},
+        {meta_ALP,                  "High Voltage ALP header"},
         {meta_WPD,                  "WPD 'DPW' header"},
         {meta_MN_STR,               "Mini Ninjas 'STR' header"},
         {meta_MSS,                  "Guerilla MCSS header"},
diff --git a/src/meta/meta.h b/src/meta/meta.h
index 064e8553..f423926f 100644
--- a/src/meta/meta.h
+++ b/src/meta/meta.h
@@ -541,7 +541,7 @@ VGMSTREAM * init_vgmstream_eb_sf0(STREAMFILE* streamFile);
 
 VGMSTREAM * init_vgmstream_mtaf(STREAMFILE* streamFile);
 
-VGMSTREAM * init_vgmstream_tun(STREAMFILE* streamFile);
+VGMSTREAM* init_vgmstream_alp(STREAMFILE* sf);
 
 VGMSTREAM * init_vgmstream_wpd(STREAMFILE* streamFile);
 
diff --git a/src/meta/tun.c b/src/meta/tun.c
index 78dfbb2a..4af0e2e6 100644
--- a/src/meta/tun.c
+++ b/src/meta/tun.c
@@ -1,31 +1,43 @@
 #include "meta.h"
 #include "../coding/coding.h"
 
-/* ALP - from LEGO Racers (PC) */
-VGMSTREAM* init_vgmstream_tun(STREAMFILE* sf) {
+/* ALP - from High Voltage games [LEGO Racers (PC), NBA Inside Drive 2000 (PC)] */
+VGMSTREAM* init_vgmstream_alp(STREAMFILE* sf) {
     VGMSTREAM* vgmstream = NULL;
     off_t start_offset;
-    int loop_flag, channels;
+    int loop_flag, channels, sample_rate;
 
     /* checks */
     if (!is_id32be(0x00,sf, "ALP "))
         goto fail;
     if (!check_extensions(sf,"tun"))
         goto fail;
-    /* also "ADPCM" at 0x08 */
 
-    channels = 2; /* probably at 0x0F */
+    start_offset = read_u32le(0x04, sf) + 0x08;
+    if (!is_id32be(0x08,sf, "ADPC")) /* codec, probably */
+        goto fail;
+    /* 0x0c: "M\0\0" */
+    channels = read_u8(0x0f, sf);
+    if (channels != 2) /* not seen though mono should work (raw IMA_HV in NBA Hangtime uses it) */
+        goto fail;
+
+    /* NBA Inside Drive (PC) */
+    if (start_offset >= 0x14)
+        sample_rate = read_s32le(0x10, sf); /* still 22050 thogh */
+    else
+        sample_rate = 22050;
+
     loop_flag = 0;
-    start_offset = 0x10;
+
 
     /* build the VGMSTREAM */
     vgmstream = allocate_vgmstream(channels,loop_flag);
     if (!vgmstream) goto fail;
 
-    vgmstream->meta_type = meta_TUN;
+    vgmstream->meta_type = meta_ALP;
     vgmstream->channels = channels;
-    vgmstream->sample_rate = 22050;
-    vgmstream->num_samples = ima_bytes_to_samples(get_streamfile_size(sf) - 0x10, channels);
+    vgmstream->sample_rate = sample_rate;
+    vgmstream->num_samples = ima_bytes_to_samples(get_streamfile_size(sf) - start_offset, channels);
 
     vgmstream->coding_type = coding_HV_IMA;
     vgmstream->layout_type = layout_interleave;
diff --git a/src/vgmstream.c b/src/vgmstream.c
index 12061537..dd87b4bd 100644
--- a/src/vgmstream.c
+++ b/src/vgmstream.c
@@ -257,7 +257,7 @@ VGMSTREAM* (*init_vgmstream_functions[])(STREAMFILE* sf) = {
     init_vgmstream_eb_sfx,
     init_vgmstream_eb_sf0,
     init_vgmstream_mtaf,
-    init_vgmstream_tun,
+    init_vgmstream_alp,
     init_vgmstream_wpd,
     init_vgmstream_mn_str,
     init_vgmstream_mss,
diff --git a/src/vgmstream.h b/src/vgmstream.h
index 4257e019..06ff5297 100644
--- a/src/vgmstream.h
+++ b/src/vgmstream.h
@@ -568,7 +568,7 @@ typedef enum {
     meta_MTAF,
     meta_PS2_VAG1,          /* Metal Gear Solid 3 VAG1 */
     meta_PS2_VAG2,          /* Metal Gear Solid 3 VAG2 */
-    meta_TUN,               /* LEGO Racers (PC) */
+    meta_ALP,
     meta_WPD,               /* Shuffle! (PC) */
     meta_MN_STR,            /* Mini Ninjas (PC/PS3/WII) */
     meta_MSS,               /* Guerilla: ShellShock Nam '67 (PS2/Xbox), Killzone (PS2) */