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-rw-r--r--libfaad2/huffman.h325
1 files changed, 16 insertions, 309 deletions
diff --git a/libfaad2/huffman.h b/libfaad2/huffman.h
index 09079bd877..30b70fcc4e 100644
--- a/libfaad2/huffman.h
+++ b/libfaad2/huffman.h
@@ -22,7 +22,7 @@
** Commercial non-GPL licensing of this software is possible.
** For more info contact Ahead Software through Mpeg4AAClicense@nero.com.
**
-** $Id: huffman.h,v 1.13 2003/07/29 08:20:12 menno Exp $
+** $Id: huffman.h,v 1.1 2003/08/30 22:30:21 arpi Exp $
**/
#ifndef __HUFFMAN_H__
@@ -32,317 +32,24 @@
extern "C" {
#endif
-#include <stdlib.h>
-#ifdef ANALYSIS
-#include <stdio.h>
-#endif
-#include "bits.h"
-#include "codebook/hcb.h"
-
-
-static INLINE int8_t huffman_scale_factor(bitfile *ld)
-{
- uint16_t offset = 0;
-
- while (hcb_sf[offset][1])
- {
- uint8_t b = faad_get1bit(ld
- DEBUGVAR(1,255,"huffman_scale_factor()"));
- offset += hcb_sf[offset][b];
-
- if (offset > 240)
- {
- /* printf("ERROR: offset into hcb_sf = %d >240!\n", offset); */
- return -1;
- }
- }
-
- return hcb_sf[offset][0];
-}
-
-
-hcb *hcb_table[] = {
- 0, hcb1_1, hcb2_1, 0, hcb4_1, 0, hcb6_1, 0, hcb8_1, 0, hcb10_1, hcb11_1
-};
-
-hcb_2_quad *hcb_2_quad_table[] = {
- 0, hcb1_2, hcb2_2, 0, hcb4_2, 0, 0, 0, 0, 0, 0, 0
-};
-
-hcb_2_pair *hcb_2_pair_table[] = {
- 0, 0, 0, 0, 0, 0, hcb6_2, 0, hcb8_2, 0, hcb10_2, hcb11_2
-};
-
-hcb_bin_pair *hcb_bin_table[] = {
- 0, 0, 0, 0, 0, hcb5, 0, hcb7, 0, hcb9, 0, 0
-};
-
-uint8_t hcbN[] = { 0, 5, 5, 0, 5, 0, 5, 0, 5, 0, 6, 5 };
-
-/* defines whether a huffman codebook is unsigned or not */
-/* Table 4.6.2 */
-uint8_t unsigned_cb[] = { 0, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0,
- /* codebook 16 to 31 */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1
-};
-
-int hcb_2_quad_table_size[] = { 0, 114, 86, 0, 185, 0, 0, 0, 0, 0, 0, 0 };
-int hcb_2_pair_table_size[] = { 0, 0, 0, 0, 0, 0, 126, 0, 83, 0, 210, 373 };
-int hcb_bin_table_size[] = { 0, 0, 0, 161, 0, 161, 0, 127, 0, 337, 0, 0 };
-
-static INLINE void huffman_sign_bits(bitfile *ld, int16_t *sp, uint8_t len)
-{
- uint8_t i;
-
- for(i = 0; i < len; i++)
- {
- if(sp[i])
- {
- if(faad_get1bit(ld
- DEBUGVAR(1,5,"huffman_sign_bits(): sign bit")) & 1)
- {
- sp[i] = -sp[i];
- }
- }
- }
-}
-
-static INLINE int16_t huffman_getescape(bitfile *ld, int16_t sp)
-{
- uint8_t neg, i;
- int16_t j;
- int32_t off;
-
- if (sp < 0) {
- if(sp != -16)
- return sp;
- neg = 1;
- } else {
- if(sp != 16)
- return sp;
- neg = 0;
- }
-
- for (i = 4; ; i++)
- {
- if (faad_get1bit(ld
- DEBUGVAR(1,6,"huffman_getescape(): escape size")) == 0)
- {
- break;
- }
- }
-
- off = faad_getbits(ld, i
- DEBUGVAR(1,9,"huffman_getescape(): escape"));
-
- j = off + (1<<i);
- if (neg)
- j = -j;
-
- return j;
-}
-
-static uint8_t huffman_2step_quad(uint8_t cb, bitfile *ld, int16_t *sp)
-{
- uint32_t cw;
- uint16_t offset = 0;
- uint8_t extra_bits;
- cw = faad_showbits(ld, hcbN[cb]);
- offset = hcb_table[cb][cw].offset;
- extra_bits = hcb_table[cb][cw].extra_bits;
-
- if (extra_bits)
- {
- /* we know for sure it's more than hcbN[cb] bits long */
- faad_flushbits(ld, hcbN[cb]);
- offset += (uint16_t)faad_showbits(ld, extra_bits);
- faad_flushbits(ld, hcb_2_quad_table[cb][offset].bits - hcbN[cb]);
- } else {
- faad_flushbits(ld, hcb_2_quad_table[cb][offset].bits);
- }
-
- if (offset > hcb_2_quad_table_size[cb])
- {
- /* printf("ERROR: offset into hcb_2_quad_table = %d >%d!\n", offset,
- hcb_2_quad_table_size[cb]); */
- return 10;
- }
-
- sp[0] = hcb_2_quad_table[cb][offset].x;
- sp[1] = hcb_2_quad_table[cb][offset].y;
- sp[2] = hcb_2_quad_table[cb][offset].v;
- sp[3] = hcb_2_quad_table[cb][offset].w;
-
- return 0;
-}
-
-static uint8_t huffman_2step_quad_sign(uint8_t cb, bitfile *ld, int16_t *sp)
-{
- uint8_t err = huffman_2step_quad(cb, ld, sp);
- huffman_sign_bits(ld, sp, QUAD_LEN);
-
- return err;
-}
-
-static uint8_t huffman_2step_pair(uint8_t cb, bitfile *ld, int16_t *sp)
-{
- uint32_t cw;
- uint16_t offset = 0;
- uint8_t extra_bits;
-
- cw = faad_showbits(ld, hcbN[cb]);
- offset = hcb_table[cb][cw].offset;
- extra_bits = hcb_table[cb][cw].extra_bits;
-
- if (extra_bits)
- {
- /* we know for sure it's more than hcbN[cb] bits long */
- faad_flushbits(ld, hcbN[cb]);
- offset += (uint16_t)faad_showbits(ld, extra_bits);
- faad_flushbits(ld, hcb_2_pair_table[cb][offset].bits - hcbN[cb]);
- } else {
- faad_flushbits(ld, hcb_2_pair_table[cb][offset].bits);
- }
-
- if (offset > hcb_2_pair_table_size[cb])
- {
- /* printf("ERROR: offset into hcb_2_pair_table = %d >%d!\n", offset,
- hcb_2_pair_table_size[cb]); */
- return 10;
- }
-
- sp[0] = hcb_2_pair_table[cb][offset].x;
- sp[1] = hcb_2_pair_table[cb][offset].y;
-
- return 0;
-}
-
-static huffman_2step_pair_sign(uint8_t cb, bitfile *ld, int16_t *sp)
-{
- uint8_t err = huffman_2step_pair(cb, ld, sp);
- huffman_sign_bits(ld, sp, PAIR_LEN);
-
- return err;
-}
-
-static uint8_t huffman_binary_quad(uint8_t cb, bitfile *ld, int16_t *sp)
-{
- uint16_t offset = 0;
-
- while (!hcb3[offset].is_leaf)
- {
- uint8_t b = faad_get1bit(ld
- DEBUGVAR(1,255,"huffman_spectral_data():3"));
- offset += hcb3[offset].data[b];
- }
-
- if (offset > hcb_bin_table_size[cb])
- {
- /* printf("ERROR: offset into hcb_bin_table = %d >%d!\n", offset,
- hcb_bin_table_size[cb]); */
- return 10;
- }
-
- sp[0] = hcb3[offset].data[0];
- sp[1] = hcb3[offset].data[1];
- sp[2] = hcb3[offset].data[2];
- sp[3] = hcb3[offset].data[3];
-
- return 0;
-}
-
-static uint8_t huffman_binary_quad_sign(uint8_t cb, bitfile *ld, int16_t *sp)
-{
- uint8_t err = huffman_binary_quad(cb, ld, sp);
- huffman_sign_bits(ld, sp, QUAD_LEN);
-
- return err;
-}
-
-static uint8_t huffman_binary_pair(uint8_t cb, bitfile *ld, int16_t *sp)
-{
- uint16_t offset = 0;
-
- while (!hcb_bin_table[cb][offset].is_leaf)
- {
- uint8_t b = faad_get1bit(ld
- DEBUGVAR(1,255,"huffman_spectral_data():9"));
- offset += hcb_bin_table[cb][offset].data[b];
- }
-
- if (offset > hcb_bin_table_size[cb])
- {
- /* printf("ERROR: offset into hcb_bin_table = %d >%d!\n", offset,
- hcb_bin_table_size[cb]); */
- return 10;
- }
-
- sp[0] = hcb_bin_table[cb][offset].data[0];
- sp[1] = hcb_bin_table[cb][offset].data[1];
-
- return 0;
-}
-
-static uint8_t huffman_binary_pair_sign(uint8_t cb, bitfile *ld, int16_t *sp)
-{
- uint8_t err = huffman_binary_pair(cb, ld, sp);
- huffman_sign_bits(ld, sp, PAIR_LEN);
-
- return err;
-}
-
-static int16_t huffman_codebook(uint8_t i)
-{
- static const uint32_t data = 16428320;
- if (i == 0) return (int16_t)(data >> 16) & 0xFFFF;
- else return (int16_t)data & 0xFFFF;
-}
-
-static INLINE uint8_t huffman_spectral_data(uint8_t cb, bitfile *ld, int16_t *sp)
-{
- switch (cb)
- {
- case 1: /* 2-step method for data quadruples */
- case 2:
- return huffman_2step_quad(cb, ld, sp);
- case 3: /* binary search for data quadruples */
- return huffman_binary_quad_sign(cb, ld, sp);
- case 4: /* 2-step method for data quadruples */
- return huffman_2step_quad_sign(cb, ld, sp);
- case 5: /* binary search for data pairs */
- return huffman_binary_pair(cb, ld, sp);
- case 6: /* 2-step method for data pairs */
- return huffman_2step_pair(cb, ld, sp);
- case 7: /* binary search for data pairs */
- case 9:
- return huffman_binary_pair_sign(cb, ld, sp);
- case 8: /* 2-step method for data pairs */
- case 10:
- return huffman_2step_pair_sign(cb, ld, sp);
- case 12: {
- uint8_t err = huffman_2step_quad(1, ld, sp);
- sp[0] = huffman_codebook(0); sp[1] = huffman_codebook(1);
- return err; }
- case 11:
+static INLINE void huffman_sign_bits(bitfile *ld, int16_t *sp, uint8_t len);
+static INLINE int16_t huffman_getescape(bitfile *ld, int16_t sp);
+static uint8_t huffman_2step_quad(uint8_t cb, bitfile *ld, int16_t *sp);
+static uint8_t huffman_2step_quad_sign(uint8_t cb, bitfile *ld, int16_t *sp);
+static uint8_t huffman_2step_pair(uint8_t cb, bitfile *ld, int16_t *sp);
+static huffman_2step_pair_sign(uint8_t cb, bitfile *ld, int16_t *sp);
+static uint8_t huffman_binary_quad(uint8_t cb, bitfile *ld, int16_t *sp);
+static uint8_t huffman_binary_quad_sign(uint8_t cb, bitfile *ld, int16_t *sp);
+static uint8_t huffman_binary_pair(uint8_t cb, bitfile *ld, int16_t *sp);
+static uint8_t huffman_binary_pair_sign(uint8_t cb, bitfile *ld, int16_t *sp);
+static int16_t huffman_codebook(uint8_t i);
+
+int8_t huffman_scale_factor(bitfile *ld);
+uint8_t huffman_spectral_data(uint8_t cb, bitfile *ld, int16_t *sp);
#ifdef ERROR_RESILIENCE
- /* VCB11 uses codebook 11 */
- case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23:
- case 24: case 25: case 26: case 27: case 28: case 29: case 30: case 31:
- /* TODO: If ER is used, some extra error checking should be done */
+int8_t huffman_spectral_data_2(uint8_t cb, bits_t *ld, int16_t *sp);
#endif
- {
- uint8_t err = huffman_2step_pair_sign(11, ld, sp);
- sp[0] = huffman_getescape(ld, sp[0]);
- sp[1] = huffman_getescape(ld, sp[1]);
- return err;
- }
- default:
- /* Non existent codebook number, something went wrong */
- return 11;
- }
-
- return 0;
-}
#ifdef __cplusplus
}
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