merge FAAD2 - the GPL AAC decoder library.

xine_decoder.c is working, but demux_qt must send some needed
initialization data. currently it's hardcoded to play my test stream, so
it's not usable yet.

CVS patchset: 2266
CVS date: 2002/07/14 23:33:35

1 files changed, 136 insertions, 0 deletions

diff --git a/src/libfaad/codebook/hcb.h b/src/libfaad/codebook/hcb.h
new file mode 100644
index 000000000..4a368d669
--- /dev/null
+++ b/src/libfaad/codebook/hcb.h
@@ -0,0 +1,136 @@
+/*
+** FAAD - Freeware Advanced Audio Decoder
+** Copyright (C) 2002 M. Bakker
+**
+** This program is free software; you can redistribute it and/or modify
+** it under the terms of the GNU General Public License as published by
+** the Free Software Foundation; either version 2 of the License, or
+** (at your option) any later version.
+**
+** This program is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+** GNU General Public License for more details.
+**
+** You should have received a copy of the GNU General Public License
+** along with this program; if not, write to the Free Software
+** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+**
+** $Id: hcb.h,v 1.1 2002/07/14 23:33:35 miguelfreitas Exp $
+**/
+
+#ifndef __HCB_H__
+#define __HCB_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ *  Optimal huffman decoding for AAC taken from:
+ *  "SELECTING AN OPTIMAL HUFFMAN DECODER FOR AAC" by
+ *  VLADIMIR Z. MESAROVIC , RAGHUNATH RAO, MIROSLAV V. DOKIC, and SACHIN DEO
+ *  AES paper 5436
+ *
+ *   2 methods are used for huffman decoding:
+ *   - binary search
+ *   - 2-step table lookup
+ *
+ *   The choice of the "optimal" method is based on the fact that if the
+ *   memory size for the Two-step is exorbitantly high then the decision
+ *   is Binary search for that codebook. However, for marginally more memory
+ *   size, if Twostep outperforms even the best case of Binary then the
+ *   decision is Two-step for that codebook.
+ *
+ *   The following methods are used for the different tables.
+ *   codebook   "optimal" method
+ *    HCB_1      2-Step
+ *    HCB_2      2-Step
+ *    HCB_3      Binary
+ *    HCB_4      2-Step
+ *    HCB_5      Binary
+ *    HCB_6      2-Step
+ *    HCB_7      Binary
+ *    HCB_8      2-Step
+ *    HCB_9      Binary
+ *    HCB_10     2-Step
+ *    HCB_11     2-Step
+ *    HCB_SF     Binary
+ *
+ */
+
+
+#define ZERO_HCB       0
+#define FIRST_PAIR_HCB 5
+#define ESC_HCB        11
+#define QUAD_LEN       4
+#define PAIR_LEN       2
+#define BOOKSCL        12
+#define NOISE_HCB      13
+#define INTENSITY_HCB2 14
+#define INTENSITY_HCB  15
+
+/* 1st step table */
+typedef struct
+{
+    uint8_t offset;
+    uint8_t extra_bits;
+} hcb;
+
+/* 2nd step table with quadruple data */
+typedef struct
+{
+    uint8_t bits;
+    int8_t x;
+    int8_t y;
+} hcb_2_pair;
+
+typedef struct
+{
+    uint8_t bits;
+    int8_t x;
+    int8_t y;
+    int8_t v;
+    int8_t w;
+} hcb_2_quad;
+
+/* binary search table */
+typedef struct
+{
+    uint8_t is_leaf;
+    int8_t data[4];
+} hcb_bin_quad;
+
+typedef struct
+{
+    uint8_t is_leaf;
+    int8_t data[2];
+} hcb_bin_pair;
+
+extern hcb hcb1_1[];
+extern hcb hcb2_1[];
+extern hcb hcb4_1[];
+extern hcb hcb6_1[];
+extern hcb hcb8_1[];
+extern hcb hcb10_1[];
+extern hcb hcb11_1[];
+
+extern hcb_2_quad hcb1_2[];
+extern hcb_2_quad hcb2_2[];
+extern hcb_2_quad hcb4_2[];
+extern hcb_2_pair hcb6_2[];
+extern hcb_2_pair hcb8_2[];
+extern hcb_2_pair hcb10_2[];
+extern hcb_2_pair hcb11_2[];
+
+extern hcb_bin_quad hcb3[];
+extern hcb_bin_pair hcb5[];
+extern hcb_bin_pair hcb7[];
+extern hcb_bin_pair hcb9[];
+
+extern uint8_t hcb_sf[][2];
+
+#ifdef __cplusplus
+}
+#endif
+#endif