[FFmpeg-cvslog] r9082 - in trunk/libavcodec: Makefile mpegaudio.c mpegaudio.h mpegaudiodec.c mpegaudioenc.c

aurel subversion
Mon May 21 00:50:30 CEST 2007


Author: aurel
Date: Mon May 21 00:50:29 2007
New Revision: 9082

Log:
remove dependency of mpeg audio encoder over mpeg audio decoder

Added:
   trunk/libavcodec/mpegaudio.c
      - copied, changed from r9081, /trunk/libavcodec/mpegaudiodec.c
   trunk/libavcodec/mpegaudioenc.c
      - copied, changed from r9081, /trunk/libavcodec/mpegaudio.c
Modified:
   trunk/libavcodec/Makefile
   trunk/libavcodec/mpegaudio.h
   trunk/libavcodec/mpegaudiodec.c

Modified: trunk/libavcodec/Makefile
==============================================================================
--- trunk/libavcodec/Makefile	(original)
+++ trunk/libavcodec/Makefile	Mon May 21 00:50:29 2007
@@ -19,7 +19,7 @@ OBJS= bitstream.o \
       motion_est.o \
       imgconvert.o \
       mpeg12.o \
-      mpegaudiodec.o mpegaudiodecheader.o mpegaudiodata.o \
+      mpegaudiodec.o mpegaudiodecheader.o mpegaudiodata.o mpegaudio.o \
       simple_idct.o \
       ratecontrol.o \
       eval.o \
@@ -108,7 +108,7 @@ OBJS-$(CONFIG_MJPEG_DECODER)           +
 OBJS-$(CONFIG_MJPEG_ENCODER)           += mjpegenc.o mjpeg.o mpegvideo.o
 OBJS-$(CONFIG_MJPEGB_DECODER)          += mjpegbdec.o mjpegdec.o mjpeg.o
 OBJS-$(CONFIG_MMVIDEO_DECODER)         += mmvideo.o
-OBJS-$(CONFIG_MP2_ENCODER)             += mpegaudio.o mpegaudiodata.o
+OBJS-$(CONFIG_MP2_ENCODER)             += mpegaudioenc.o mpegaudio.o mpegaudiodata.o
 OBJS-$(CONFIG_MPC7_DECODER)            += mpc.o
 OBJS-$(CONFIG_MSMPEG4V1_DECODER)       += msmpeg4.o msmpeg4data.o
 OBJS-$(CONFIG_MSMPEG4V1_ENCODER)       += msmpeg4.o msmpeg4data.o

Copied: trunk/libavcodec/mpegaudio.c (from r9081, /trunk/libavcodec/mpegaudiodec.c)
==============================================================================
--- /trunk/libavcodec/mpegaudiodec.c	(original)
+++ trunk/libavcodec/mpegaudio.c	Mon May 21 00:50:29 2007
@@ -1,5 +1,5 @@
 /*
- * MPEG Audio decoder
+ * MPEG Audio common code
  * Copyright (c) 2001, 2002 Fabrice Bellard.
  *
  * This file is part of FFmpeg.
@@ -20,1128 +20,15 @@
  */
 
 /**
- * @file mpegaudiodec.c
- * MPEG Audio decoder.
- */
-
-//#define DEBUG
-#include "avcodec.h"
-#include "bitstream.h"
-#include "dsputil.h"
-
-/*
- * TODO:
- *  - in low precision mode, use more 16 bit multiplies in synth filter
- *  - test lsf / mpeg25 extensively.
+ * @file mpegaudio.c
+ * MPEG Audio common code.
  */
 
-/* define USE_HIGHPRECISION to have a bit exact (but slower) mpeg
-   audio decoder */
-#ifdef CONFIG_MPEGAUDIO_HP
-#   define USE_HIGHPRECISION
-#endif
-
 #include "mpegaudio.h"
-#include "mpegaudiodecheader.h"
-
-#include "mathops.h"
-
-#define FRAC_ONE    (1 << FRAC_BITS)
-
-#define FIX(a)   ((int)((a) * FRAC_ONE))
-/* WARNING: only correct for posititive numbers */
-#define FIXR(a)   ((int)((a) * FRAC_ONE + 0.5))
-#define FRAC_RND(a) (((a) + (FRAC_ONE/2)) >> FRAC_BITS)
-
-#define FIXHR(a) ((int)((a) * (1LL<<32) + 0.5))
-
-/****************/
-
-#define HEADER_SIZE 4
-
-/**
- * Context for MP3On4 decoder
- */
-typedef struct MP3On4DecodeContext {
-    int frames;   ///< number of mp3 frames per block (number of mp3 decoder instances)
-    int chan_cfg; ///< channel config number
-    MPADecodeContext *mp3decctx[5]; ///< MPADecodeContext for every decoder instance
-} MP3On4DecodeContext;
-
-/* layer 3 "granule" */
-typedef struct GranuleDef {
-    uint8_t scfsi;
-    int part2_3_length;
-    int big_values;
-    int global_gain;
-    int scalefac_compress;
-    uint8_t block_type;
-    uint8_t switch_point;
-    int table_select[3];
-    int subblock_gain[3];
-    uint8_t scalefac_scale;
-    uint8_t count1table_select;
-    int region_size[3]; /* number of huffman codes in each region */
-    int preflag;
-    int short_start, long_end; /* long/short band indexes */
-    uint8_t scale_factors[40];
-    int32_t sb_hybrid[SBLIMIT * 18]; /* 576 samples */
-} GranuleDef;
-
-#define MODE_EXT_MS_STEREO 2
-#define MODE_EXT_I_STEREO  1
-
-/* layer 3 huffman tables */
-typedef struct HuffTable {
-    int xsize;
-    const uint8_t *bits;
-    const uint16_t *codes;
-} HuffTable;
-
-#include "mpegaudiodata.h"
-#include "mpegaudiodectab.h"
-
-static void compute_antialias_integer(MPADecodeContext *s, GranuleDef *g);
-static void compute_antialias_float(MPADecodeContext *s, GranuleDef *g);
-
-/* vlc structure for decoding layer 3 huffman tables */
-static VLC huff_vlc[16];
-static VLC huff_quad_vlc[2];
-/* computed from band_size_long */
-static uint16_t band_index_long[9][23];
-/* XXX: free when all decoders are closed */
-#define TABLE_4_3_SIZE (8191 + 16)*4
-static int8_t  table_4_3_exp[TABLE_4_3_SIZE];
-static uint32_t table_4_3_value[TABLE_4_3_SIZE];
-static uint32_t exp_table[512];
-static uint32_t expval_table[512][16];
-/* intensity stereo coef table */
-static int32_t is_table[2][16];
-static int32_t is_table_lsf[2][2][16];
-static int32_t csa_table[8][4];
-static float csa_table_float[8][4];
-static int32_t mdct_win[8][36];
-
-/* lower 2 bits: modulo 3, higher bits: shift */
-static uint16_t scale_factor_modshift[64];
-/* [i][j]:  2^(-j/3) * FRAC_ONE * 2^(i+2) / (2^(i+2) - 1) */
-static int32_t scale_factor_mult[15][3];
-/* mult table for layer 2 group quantization */
-
-#define SCALE_GEN(v) \
-{ FIXR(1.0 * (v)), FIXR(0.7937005259 * (v)), FIXR(0.6299605249 * (v)) }
-
-static const int32_t scale_factor_mult2[3][3] = {
-    SCALE_GEN(4.0 / 3.0), /* 3 steps */
-    SCALE_GEN(4.0 / 5.0), /* 5 steps */
-    SCALE_GEN(4.0 / 9.0), /* 9 steps */
-};
-
-static DECLARE_ALIGNED_16(MPA_INT, window[512]);
-
-/* layer 1 unscaling */
-/* n = number of bits of the mantissa minus 1 */
-static inline int l1_unscale(int n, int mant, int scale_factor)
-{
-    int shift, mod;
-    int64_t val;
-
-    shift = scale_factor_modshift[scale_factor];
-    mod = shift & 3;
-    shift >>= 2;
-    val = MUL64(mant + (-1 << n) + 1, scale_factor_mult[n-1][mod]);
-    shift += n;
-    /* NOTE: at this point, 1 <= shift >= 21 + 15 */
-    return (int)((val + (1LL << (shift - 1))) >> shift);
-}
-
-static inline int l2_unscale_group(int steps, int mant, int scale_factor)
-{
-    int shift, mod, val;
-
-    shift = scale_factor_modshift[scale_factor];
-    mod = shift & 3;
-    shift >>= 2;
-
-    val = (mant - (steps >> 1)) * scale_factor_mult2[steps >> 2][mod];
-    /* NOTE: at this point, 0 <= shift <= 21 */
-    if (shift > 0)
-        val = (val + (1 << (shift - 1))) >> shift;
-    return val;
-}
-
-/* compute value^(4/3) * 2^(exponent/4). It normalized to FRAC_BITS */
-static inline int l3_unscale(int value, int exponent)
-{
-    unsigned int m;
-    int e;
-
-    e = table_4_3_exp  [4*value + (exponent&3)];
-    m = table_4_3_value[4*value + (exponent&3)];
-    e -= (exponent >> 2);
-    assert(e>=1);
-    if (e > 31)
-        return 0;
-    m = (m + (1 << (e-1))) >> e;
-
-    return m;
-}
-
-/* all integer n^(4/3) computation code */
-#define DEV_ORDER 13
-
-#define POW_FRAC_BITS 24
-#define POW_FRAC_ONE    (1 << POW_FRAC_BITS)
-#define POW_FIX(a)   ((int)((a) * POW_FRAC_ONE))
-#define POW_MULL(a,b) (((int64_t)(a) * (int64_t)(b)) >> POW_FRAC_BITS)
-
-static int dev_4_3_coefs[DEV_ORDER];
-
-#if 0 /* unused */
-static int pow_mult3[3] = {
-    POW_FIX(1.0),
-    POW_FIX(1.25992104989487316476),
-    POW_FIX(1.58740105196819947474),
-};
-#endif
-
-static void int_pow_init(void)
-{
-    int i, a;
-
-    a = POW_FIX(1.0);
-    for(i=0;i<DEV_ORDER;i++) {
-        a = POW_MULL(a, POW_FIX(4.0 / 3.0) - i * POW_FIX(1.0)) / (i + 1);
-        dev_4_3_coefs[i] = a;
-    }
-}
-
-#if 0 /* unused, remove? */
-/* return the mantissa and the binary exponent */
-static int int_pow(int i, int *exp_ptr)
-{
-    int e, er, eq, j;
-    int a, a1;
-
-    /* renormalize */
-    a = i;
-    e = POW_FRAC_BITS;
-    while (a < (1 << (POW_FRAC_BITS - 1))) {
-        a = a << 1;
-        e--;
-    }
-    a -= (1 << POW_FRAC_BITS);
-    a1 = 0;
-    for(j = DEV_ORDER - 1; j >= 0; j--)
-        a1 = POW_MULL(a, dev_4_3_coefs[j] + a1);
-    a = (1 << POW_FRAC_BITS) + a1;
-    /* exponent compute (exact) */
-    e = e * 4;
-    er = e % 3;
-    eq = e / 3;
-    a = POW_MULL(a, pow_mult3[er]);
-    while (a >= 2 * POW_FRAC_ONE) {
-        a = a >> 1;
-        eq++;
-    }
-    /* convert to float */
-    while (a < POW_FRAC_ONE) {
-        a = a << 1;
-        eq--;
-    }
-    /* now POW_FRAC_ONE <= a < 2 * POW_FRAC_ONE */
-#if POW_FRAC_BITS > FRAC_BITS
-    a = (a + (1 << (POW_FRAC_BITS - FRAC_BITS - 1))) >> (POW_FRAC_BITS - FRAC_BITS);
-    /* correct overflow */
-    if (a >= 2 * (1 << FRAC_BITS)) {
-        a = a >> 1;
-        eq++;
-    }
-#endif
-    *exp_ptr = eq;
-    return a;
-}
-#endif
-
-static int decode_init(AVCodecContext * avctx)
-{
-    MPADecodeContext *s = avctx->priv_data;
-    static int init=0;
-    int i, j, k;
-
-    s->avctx = avctx;
-
-#if defined(USE_HIGHPRECISION) && defined(CONFIG_AUDIO_NONSHORT)
-    avctx->sample_fmt= SAMPLE_FMT_S32;
-#else
-    avctx->sample_fmt= SAMPLE_FMT_S16;
-#endif
-    s->error_resilience= avctx->error_resilience;
-
-    if(avctx->antialias_algo != FF_AA_FLOAT)
-        s->compute_antialias= compute_antialias_integer;
-    else
-        s->compute_antialias= compute_antialias_float;
-
-    if (!init && !avctx->parse_only) {
-        /* scale factors table for layer 1/2 */
-        for(i=0;i<64;i++) {
-            int shift, mod;
-            /* 1.0 (i = 3) is normalized to 2 ^ FRAC_BITS */
-            shift = (i / 3);
-            mod = i % 3;
-            scale_factor_modshift[i] = mod | (shift << 2);
-        }
-
-        /* scale factor multiply for layer 1 */
-        for(i=0;i<15;i++) {
-            int n, norm;
-            n = i + 2;
-            norm = ((INT64_C(1) << n) * FRAC_ONE) / ((1 << n) - 1);
-            scale_factor_mult[i][0] = MULL(FIXR(1.0 * 2.0), norm);
-            scale_factor_mult[i][1] = MULL(FIXR(0.7937005259 * 2.0), norm);
-            scale_factor_mult[i][2] = MULL(FIXR(0.6299605249 * 2.0), norm);
-            dprintf(avctx, "%d: norm=%x s=%x %x %x\n",
-                    i, norm,
-                    scale_factor_mult[i][0],
-                    scale_factor_mult[i][1],
-                    scale_factor_mult[i][2]);
-        }
-
-        ff_mpa_synth_init(window);
-
-        /* huffman decode tables */
-        for(i=1;i<16;i++) {
-            const HuffTable *h = &mpa_huff_tables[i];
-            int xsize, x, y;
-            unsigned int n;
-            uint8_t  tmp_bits [512];
-            uint16_t tmp_codes[512];
-
-            memset(tmp_bits , 0, sizeof(tmp_bits ));
-            memset(tmp_codes, 0, sizeof(tmp_codes));
-
-            xsize = h->xsize;
-            n = xsize * xsize;
-
-            j = 0;
-            for(x=0;x<xsize;x++) {
-                for(y=0;y<xsize;y++){
-                    tmp_bits [(x << 5) | y | ((x&&y)<<4)]= h->bits [j  ];
-                    tmp_codes[(x << 5) | y | ((x&&y)<<4)]= h->codes[j++];
-                }
-            }
-
-            /* XXX: fail test */
-            init_vlc(&huff_vlc[i], 7, 512,
-                     tmp_bits, 1, 1, tmp_codes, 2, 2, 1);
-        }
-        for(i=0;i<2;i++) {
-            init_vlc(&huff_quad_vlc[i], i == 0 ? 7 : 4, 16,
-                     mpa_quad_bits[i], 1, 1, mpa_quad_codes[i], 1, 1, 1);
-        }
-
-        for(i=0;i<9;i++) {
-            k = 0;
-            for(j=0;j<22;j++) {
-                band_index_long[i][j] = k;
-                k += band_size_long[i][j];
-            }
-            band_index_long[i][22] = k;
-        }
-
-        /* compute n ^ (4/3) and store it in mantissa/exp format */
-
-        int_pow_init();
-        for(i=1;i<TABLE_4_3_SIZE;i++) {
-            double f, fm;
-            int e, m;
-            f = pow((double)(i/4), 4.0 / 3.0) * pow(2, (i&3)*0.25);
-            fm = frexp(f, &e);
-            m = (uint32_t)(fm*(1LL<<31) + 0.5);
-            e+= FRAC_BITS - 31 + 5 - 100;
-
-            /* normalized to FRAC_BITS */
-            table_4_3_value[i] = m;
-//            av_log(NULL, AV_LOG_DEBUG, "%d %d %f\n", i, m, pow((double)i, 4.0 / 3.0));
-            table_4_3_exp[i] = -e;
-        }
-        for(i=0; i<512*16; i++){
-            int exponent= (i>>4);
-            double f= pow(i&15, 4.0 / 3.0) * pow(2, (exponent-400)*0.25 + FRAC_BITS + 5);
-            expval_table[exponent][i&15]= llrint(f);
-            if((i&15)==1)
-                exp_table[exponent]= llrint(f);
-        }
-
-        for(i=0;i<7;i++) {
-            float f;
-            int v;
-            if (i != 6) {
-                f = tan((double)i * M_PI / 12.0);
-                v = FIXR(f / (1.0 + f));
-            } else {
-                v = FIXR(1.0);
-            }
-            is_table[0][i] = v;
-            is_table[1][6 - i] = v;
-        }
-        /* invalid values */
-        for(i=7;i<16;i++)
-            is_table[0][i] = is_table[1][i] = 0.0;
-
-        for(i=0;i<16;i++) {
-            double f;
-            int e, k;
-
-            for(j=0;j<2;j++) {
-                e = -(j + 1) * ((i + 1) >> 1);
-                f = pow(2.0, e / 4.0);
-                k = i & 1;
-                is_table_lsf[j][k ^ 1][i] = FIXR(f);
-                is_table_lsf[j][k][i] = FIXR(1.0);
-                dprintf(avctx, "is_table_lsf %d %d: %x %x\n",
-                        i, j, is_table_lsf[j][0][i], is_table_lsf[j][1][i]);
-            }
-        }
-
-        for(i=0;i<8;i++) {
-            float ci, cs, ca;
-            ci = ci_table[i];
-            cs = 1.0 / sqrt(1.0 + ci * ci);
-            ca = cs * ci;
-            csa_table[i][0] = FIXHR(cs/4);
-            csa_table[i][1] = FIXHR(ca/4);
-            csa_table[i][2] = FIXHR(ca/4) + FIXHR(cs/4);
-            csa_table[i][3] = FIXHR(ca/4) - FIXHR(cs/4);
-            csa_table_float[i][0] = cs;
-            csa_table_float[i][1] = ca;
-            csa_table_float[i][2] = ca + cs;
-            csa_table_float[i][3] = ca - cs;
-//            printf("%d %d %d %d\n", FIX(cs), FIX(cs-1), FIX(ca), FIX(cs)-FIX(ca));
-//            av_log(NULL, AV_LOG_DEBUG,"%f %f %f %f\n", cs, ca, ca+cs, ca-cs);
-        }
-
-        /* compute mdct windows */
-        for(i=0;i<36;i++) {
-            for(j=0; j<4; j++){
-                double d;
-
-                if(j==2 && i%3 != 1)
-                    continue;
-
-                d= sin(M_PI * (i + 0.5) / 36.0);
-                if(j==1){
-                    if     (i>=30) d= 0;
-                    else if(i>=24) d= sin(M_PI * (i - 18 + 0.5) / 12.0);
-                    else if(i>=18) d= 1;
-                }else if(j==3){
-                    if     (i<  6) d= 0;
-                    else if(i< 12) d= sin(M_PI * (i -  6 + 0.5) / 12.0);
-                    else if(i< 18) d= 1;
-                }
-                //merge last stage of imdct into the window coefficients
-                d*= 0.5 / cos(M_PI*(2*i + 19)/72);
-
-                if(j==2)
-                    mdct_win[j][i/3] = FIXHR((d / (1<<5)));
-                else
-                    mdct_win[j][i  ] = FIXHR((d / (1<<5)));
-//                av_log(NULL, AV_LOG_DEBUG, "%2d %d %f\n", i,j,d / (1<<5));
-            }
-        }
-
-        /* NOTE: we do frequency inversion adter the MDCT by changing
-           the sign of the right window coefs */
-        for(j=0;j<4;j++) {
-            for(i=0;i<36;i+=2) {
-                mdct_win[j + 4][i] = mdct_win[j][i];
-                mdct_win[j + 4][i + 1] = -mdct_win[j][i + 1];
-            }
-        }
-
-#if defined(DEBUG)
-        for(j=0;j<8;j++) {
-            av_log(avctx, AV_LOG_DEBUG, "win%d=\n", j);
-            for(i=0;i<36;i++)
-                av_log(avctx, AV_LOG_DEBUG, "%f, ", (double)mdct_win[j][i] / FRAC_ONE);
-            av_log(avctx, AV_LOG_DEBUG, "\n");
-        }
-#endif
-        init = 1;
-    }
-
-#ifdef DEBUG
-    s->frame_count = 0;
-#endif
-    if (avctx->codec_id == CODEC_ID_MP3ADU)
-        s->adu_mode = 1;
-    return 0;
-}
-
-/* tab[i][j] = 1.0 / (2.0 * cos(pi*(2*k+1) / 2^(6 - j))) */
-
-/* cos(i*pi/64) */
-
-#define COS0_0  FIXHR(0.50060299823519630134/2)
-#define COS0_1  FIXHR(0.50547095989754365998/2)
-#define COS0_2  FIXHR(0.51544730992262454697/2)
-#define COS0_3  FIXHR(0.53104259108978417447/2)
-#define COS0_4  FIXHR(0.55310389603444452782/2)
-#define COS0_5  FIXHR(0.58293496820613387367/2)
-#define COS0_6  FIXHR(0.62250412303566481615/2)
-#define COS0_7  FIXHR(0.67480834145500574602/2)
-#define COS0_8  FIXHR(0.74453627100229844977/2)
-#define COS0_9  FIXHR(0.83934964541552703873/2)
-#define COS0_10 FIXHR(0.97256823786196069369/2)
-#define COS0_11 FIXHR(1.16943993343288495515/4)
-#define COS0_12 FIXHR(1.48416461631416627724/4)
-#define COS0_13 FIXHR(2.05778100995341155085/8)
-#define COS0_14 FIXHR(3.40760841846871878570/8)
-#define COS0_15 FIXHR(10.19000812354805681150/32)
-
-#define COS1_0 FIXHR(0.50241928618815570551/2)
-#define COS1_1 FIXHR(0.52249861493968888062/2)
-#define COS1_2 FIXHR(0.56694403481635770368/2)
-#define COS1_3 FIXHR(0.64682178335999012954/2)
-#define COS1_4 FIXHR(0.78815462345125022473/2)
-#define COS1_5 FIXHR(1.06067768599034747134/4)
-#define COS1_6 FIXHR(1.72244709823833392782/4)
-#define COS1_7 FIXHR(5.10114861868916385802/16)
-
-#define COS2_0 FIXHR(0.50979557910415916894/2)
-#define COS2_1 FIXHR(0.60134488693504528054/2)
-#define COS2_2 FIXHR(0.89997622313641570463/2)
-#define COS2_3 FIXHR(2.56291544774150617881/8)
-
-#define COS3_0 FIXHR(0.54119610014619698439/2)
-#define COS3_1 FIXHR(1.30656296487637652785/4)
-
-#define COS4_0 FIXHR(0.70710678118654752439/2)
-
-/* butterfly operator */
-#define BF(a, b, c, s)\
-{\
-    tmp0 = tab[a] + tab[b];\
-    tmp1 = tab[a] - tab[b];\
-    tab[a] = tmp0;\
-    tab[b] = MULH(tmp1<<(s), c);\
-}
-
-#define BF1(a, b, c, d)\
-{\
-    BF(a, b, COS4_0, 1);\
-    BF(c, d,-COS4_0, 1);\
-    tab[c] += tab[d];\
-}
-
-#define BF2(a, b, c, d)\
-{\
-    BF(a, b, COS4_0, 1);\
-    BF(c, d,-COS4_0, 1);\
-    tab[c] += tab[d];\
-    tab[a] += tab[c];\
-    tab[c] += tab[b];\
-    tab[b] += tab[d];\
-}
-
-#define ADD(a, b) tab[a] += tab[b]
-
-/* DCT32 without 1/sqrt(2) coef zero scaling. */
-static void dct32(int32_t *out, int32_t *tab)
-{
-    int tmp0, tmp1;
-
-    /* pass 1 */
-    BF( 0, 31, COS0_0 , 1);
-    BF(15, 16, COS0_15, 5);
-    /* pass 2 */
-    BF( 0, 15, COS1_0 , 1);
-    BF(16, 31,-COS1_0 , 1);
-    /* pass 1 */
-    BF( 7, 24, COS0_7 , 1);
-    BF( 8, 23, COS0_8 , 1);
-    /* pass 2 */
-    BF( 7,  8, COS1_7 , 4);
-    BF(23, 24,-COS1_7 , 4);
-    /* pass 3 */
-    BF( 0,  7, COS2_0 , 1);
-    BF( 8, 15,-COS2_0 , 1);
-    BF(16, 23, COS2_0 , 1);
-    BF(24, 31,-COS2_0 , 1);
-    /* pass 1 */
-    BF( 3, 28, COS0_3 , 1);
-    BF(12, 19, COS0_12, 2);
-    /* pass 2 */
-    BF( 3, 12, COS1_3 , 1);
-    BF(19, 28,-COS1_3 , 1);
-    /* pass 1 */
-    BF( 4, 27, COS0_4 , 1);
-    BF(11, 20, COS0_11, 2);
-    /* pass 2 */
-    BF( 4, 11, COS1_4 , 1);
-    BF(20, 27,-COS1_4 , 1);
-    /* pass 3 */
-    BF( 3,  4, COS2_3 , 3);
-    BF(11, 12,-COS2_3 , 3);
-    BF(19, 20, COS2_3 , 3);
-    BF(27, 28,-COS2_3 , 3);
-    /* pass 4 */
-    BF( 0,  3, COS3_0 , 1);
-    BF( 4,  7,-COS3_0 , 1);
-    BF( 8, 11, COS3_0 , 1);
-    BF(12, 15,-COS3_0 , 1);
-    BF(16, 19, COS3_0 , 1);
-    BF(20, 23,-COS3_0 , 1);
-    BF(24, 27, COS3_0 , 1);
-    BF(28, 31,-COS3_0 , 1);
-
-
-
-    /* pass 1 */
-    BF( 1, 30, COS0_1 , 1);
-    BF(14, 17, COS0_14, 3);
-    /* pass 2 */
-    BF( 1, 14, COS1_1 , 1);
-    BF(17, 30,-COS1_1 , 1);
-    /* pass 1 */
-    BF( 6, 25, COS0_6 , 1);
-    BF( 9, 22, COS0_9 , 1);
-    /* pass 2 */
-    BF( 6,  9, COS1_6 , 2);
-    BF(22, 25,-COS1_6 , 2);
-    /* pass 3 */
-    BF( 1,  6, COS2_1 , 1);
-    BF( 9, 14,-COS2_1 , 1);
-    BF(17, 22, COS2_1 , 1);
-    BF(25, 30,-COS2_1 , 1);
-
-    /* pass 1 */
-    BF( 2, 29, COS0_2 , 1);
-    BF(13, 18, COS0_13, 3);
-    /* pass 2 */
-    BF( 2, 13, COS1_2 , 1);
-    BF(18, 29,-COS1_2 , 1);
-    /* pass 1 */
-    BF( 5, 26, COS0_5 , 1);
-    BF(10, 21, COS0_10, 1);
-    /* pass 2 */
-    BF( 5, 10, COS1_5 , 2);
-    BF(21, 26,-COS1_5 , 2);
-    /* pass 3 */
-    BF( 2,  5, COS2_2 , 1);
-    BF(10, 13,-COS2_2 , 1);
-    BF(18, 21, COS2_2 , 1);
-    BF(26, 29,-COS2_2 , 1);
-    /* pass 4 */
-    BF( 1,  2, COS3_1 , 2);
-    BF( 5,  6,-COS3_1 , 2);
-    BF( 9, 10, COS3_1 , 2);
-    BF(13, 14,-COS3_1 , 2);
-    BF(17, 18, COS3_1 , 2);
-    BF(21, 22,-COS3_1 , 2);
-    BF(25, 26, COS3_1 , 2);
-    BF(29, 30,-COS3_1 , 2);
-
-    /* pass 5 */
-    BF1( 0,  1,  2,  3);
-    BF2( 4,  5,  6,  7);
-    BF1( 8,  9, 10, 11);
-    BF2(12, 13, 14, 15);
-    BF1(16, 17, 18, 19);
-    BF2(20, 21, 22, 23);
-    BF1(24, 25, 26, 27);
-    BF2(28, 29, 30, 31);
-
-    /* pass 6 */
-
-    ADD( 8, 12);
-    ADD(12, 10);
-    ADD(10, 14);
-    ADD(14,  9);
-    ADD( 9, 13);
-    ADD(13, 11);
-    ADD(11, 15);
-
-    out[ 0] = tab[0];
-    out[16] = tab[1];
-    out[ 8] = tab[2];
-    out[24] = tab[3];
-    out[ 4] = tab[4];
-    out[20] = tab[5];
-    out[12] = tab[6];
-    out[28] = tab[7];
-    out[ 2] = tab[8];
-    out[18] = tab[9];
-    out[10] = tab[10];
-    out[26] = tab[11];
-    out[ 6] = tab[12];
-    out[22] = tab[13];
-    out[14] = tab[14];
-    out[30] = tab[15];
 
-    ADD(24, 28);
-    ADD(28, 26);
-    ADD(26, 30);
-    ADD(30, 25);
-    ADD(25, 29);
-    ADD(29, 27);
-    ADD(27, 31);
-
-    out[ 1] = tab[16] + tab[24];
-    out[17] = tab[17] + tab[25];
-    out[ 9] = tab[18] + tab[26];
-    out[25] = tab[19] + tab[27];
-    out[ 5] = tab[20] + tab[28];
-    out[21] = tab[21] + tab[29];
-    out[13] = tab[22] + tab[30];
-    out[29] = tab[23] + tab[31];
-    out[ 3] = tab[24] + tab[20];
-    out[19] = tab[25] + tab[21];
-    out[11] = tab[26] + tab[22];
-    out[27] = tab[27] + tab[23];
-    out[ 7] = tab[28] + tab[18];
-    out[23] = tab[29] + tab[19];
-    out[15] = tab[30] + tab[17];
-    out[31] = tab[31];
-}
-
-#if FRAC_BITS <= 15
-
-static inline int round_sample(int *sum)
-{
-    int sum1;
-    sum1 = (*sum) >> OUT_SHIFT;
-    *sum &= (1<<OUT_SHIFT)-1;
-    if (sum1 < OUT_MIN)
-        sum1 = OUT_MIN;
-    else if (sum1 > OUT_MAX)
-        sum1 = OUT_MAX;
-    return sum1;
-}
-
-/* signed 16x16 -> 32 multiply add accumulate */
-#define MACS(rt, ra, rb) MAC16(rt, ra, rb)
-
-/* signed 16x16 -> 32 multiply */
-#define MULS(ra, rb) MUL16(ra, rb)
-
-#else
-
-static inline int round_sample(int64_t *sum)
-{
-    int sum1;
-    sum1 = (int)((*sum) >> OUT_SHIFT);
-    *sum &= (1<<OUT_SHIFT)-1;
-    if (sum1 < OUT_MIN)
-        sum1 = OUT_MIN;
-    else if (sum1 > OUT_MAX)
-        sum1 = OUT_MAX;
-    return sum1;
-}
-
-#   define MULS(ra, rb) MUL64(ra, rb)
-#endif
-
-#define SUM8(sum, op, w, p) \
-{                                               \
-    sum op MULS((w)[0 * 64], p[0 * 64]);\
-    sum op MULS((w)[1 * 64], p[1 * 64]);\
-    sum op MULS((w)[2 * 64], p[2 * 64]);\
-    sum op MULS((w)[3 * 64], p[3 * 64]);\
-    sum op MULS((w)[4 * 64], p[4 * 64]);\
-    sum op MULS((w)[5 * 64], p[5 * 64]);\
-    sum op MULS((w)[6 * 64], p[6 * 64]);\
-    sum op MULS((w)[7 * 64], p[7 * 64]);\
-}
-
-#define SUM8P2(sum1, op1, sum2, op2, w1, w2, p) \
-{                                               \
-    int tmp;\
-    tmp = p[0 * 64];\
-    sum1 op1 MULS((w1)[0 * 64], tmp);\
-    sum2 op2 MULS((w2)[0 * 64], tmp);\
-    tmp = p[1 * 64];\
-    sum1 op1 MULS((w1)[1 * 64], tmp);\
-    sum2 op2 MULS((w2)[1 * 64], tmp);\
-    tmp = p[2 * 64];\
-    sum1 op1 MULS((w1)[2 * 64], tmp);\
-    sum2 op2 MULS((w2)[2 * 64], tmp);\
-    tmp = p[3 * 64];\
-    sum1 op1 MULS((w1)[3 * 64], tmp);\
-    sum2 op2 MULS((w2)[3 * 64], tmp);\
-    tmp = p[4 * 64];\
-    sum1 op1 MULS((w1)[4 * 64], tmp);\
-    sum2 op2 MULS((w2)[4 * 64], tmp);\
-    tmp = p[5 * 64];\
-    sum1 op1 MULS((w1)[5 * 64], tmp);\
-    sum2 op2 MULS((w2)[5 * 64], tmp);\
-    tmp = p[6 * 64];\
-    sum1 op1 MULS((w1)[6 * 64], tmp);\
-    sum2 op2 MULS((w2)[6 * 64], tmp);\
-    tmp = p[7 * 64];\
-    sum1 op1 MULS((w1)[7 * 64], tmp);\
-    sum2 op2 MULS((w2)[7 * 64], tmp);\
-}
-
-void ff_mpa_synth_init(MPA_INT *window)
-{
-    int i;
-
-    /* max = 18760, max sum over all 16 coefs : 44736 */
-    for(i=0;i<257;i++) {
-        int v;
-        v = ff_mpa_enwindow[i];
-#if WFRAC_BITS < 16
-        v = (v + (1 << (16 - WFRAC_BITS - 1))) >> (16 - WFRAC_BITS);
-#endif
-        window[i] = v;
-        if ((i & 63) != 0)
-            v = -v;
-        if (i != 0)
-            window[512 - i] = v;
-    }
-}
-
-/* 32 sub band synthesis filter. Input: 32 sub band samples, Output:
-   32 samples. */
-/* XXX: optimize by avoiding ring buffer usage */
-void ff_mpa_synth_filter(MPA_INT *synth_buf_ptr, int *synth_buf_offset,
-                         MPA_INT *window, int *dither_state,
-                         OUT_INT *samples, int incr,
-                         int32_t sb_samples[SBLIMIT])
-{
-    int32_t tmp[32];
-    register MPA_INT *synth_buf;
-    register const MPA_INT *w, *w2, *p;
-    int j, offset, v;
-    OUT_INT *samples2;
-#if FRAC_BITS <= 15
-    int sum, sum2;
-#else
-    int64_t sum, sum2;
-#endif
-
-    dct32(tmp, sb_samples);
-
-    offset = *synth_buf_offset;
-    synth_buf = synth_buf_ptr + offset;
-
-    for(j=0;j<32;j++) {
-        v = tmp[j];
-#if FRAC_BITS <= 15
-        /* NOTE: can cause a loss in precision if very high amplitude
-           sound */
-        if (v > 32767)
-            v = 32767;
-        else if (v < -32768)
-            v = -32768;
-#endif
-        synth_buf[j] = v;
-    }
-    /* copy to avoid wrap */
-    memcpy(synth_buf + 512, synth_buf, 32 * sizeof(MPA_INT));
-
-    samples2 = samples + 31 * incr;
-    w = window;
-    w2 = window + 31;
-
-    sum = *dither_state;
-    p = synth_buf + 16;
-    SUM8(sum, +=, w, p);
-    p = synth_buf + 48;
-    SUM8(sum, -=, w + 32, p);
-    *samples = round_sample(&sum);
-    samples += incr;
-    w++;
-
-    /* we calculate two samples at the same time to avoid one memory
-       access per two sample */
-    for(j=1;j<16;j++) {
-        sum2 = 0;
-        p = synth_buf + 16 + j;
-        SUM8P2(sum, +=, sum2, -=, w, w2, p);
-        p = synth_buf + 48 - j;
-        SUM8P2(sum, -=, sum2, -=, w + 32, w2 + 32, p);
-
-        *samples = round_sample(&sum);
-        samples += incr;
-        sum += sum2;
-        *samples2 = round_sample(&sum);
-        samples2 -= incr;
-        w++;
-        w2--;
-    }
-
-    p = synth_buf + 32;
-    SUM8(sum, -=, w + 32, p);
-    *samples = round_sample(&sum);
-    *dither_state= sum;
-
-    offset = (offset - 32) & 511;
-    *synth_buf_offset = offset;
-}
-
-#define C3 FIXHR(0.86602540378443864676/2)
-
-/* 0.5 / cos(pi*(2*i+1)/36) */
-static const int icos36[9] = {
-    FIXR(0.50190991877167369479),
-    FIXR(0.51763809020504152469), //0
-    FIXR(0.55168895948124587824),
-    FIXR(0.61038729438072803416),
-    FIXR(0.70710678118654752439), //1
-    FIXR(0.87172339781054900991),
-    FIXR(1.18310079157624925896),
-    FIXR(1.93185165257813657349), //2
-    FIXR(5.73685662283492756461),
-};
-
-/* 0.5 / cos(pi*(2*i+1)/36) */
-static const int icos36h[9] = {
-    FIXHR(0.50190991877167369479/2),
-    FIXHR(0.51763809020504152469/2), //0
-    FIXHR(0.55168895948124587824/2),
-    FIXHR(0.61038729438072803416/2),
-    FIXHR(0.70710678118654752439/2), //1
-    FIXHR(0.87172339781054900991/2),
-    FIXHR(1.18310079157624925896/4),
-    FIXHR(1.93185165257813657349/4), //2
-//    FIXHR(5.73685662283492756461),
-};
-
-/* 12 points IMDCT. We compute it "by hand" by factorizing obvious
-   cases. */
-static void imdct12(int *out, int *in)
-{
-    int in0, in1, in2, in3, in4, in5, t1, t2;
-
-    in0= in[0*3];
-    in1= in[1*3] + in[0*3];
-    in2= in[2*3] + in[1*3];
-    in3= in[3*3] + in[2*3];
-    in4= in[4*3] + in[3*3];
-    in5= in[5*3] + in[4*3];
-    in5 += in3;
-    in3 += in1;
-
-    in2= MULH(2*in2, C3);
-    in3= MULH(4*in3, C3);
-
-    t1 = in0 - in4;
-    t2 = MULH(2*(in1 - in5), icos36h[4]);
-
-    out[ 7]=
-    out[10]= t1 + t2;
-    out[ 1]=
-    out[ 4]= t1 - t2;
-
-    in0 += in4>>1;
-    in4 = in0 + in2;
-    in5 += 2*in1;
-    in1 = MULH(in5 + in3, icos36h[1]);
-    out[ 8]=
-    out[ 9]= in4 + in1;
-    out[ 2]=
-    out[ 3]= in4 - in1;
-
-    in0 -= in2;
-    in5 = MULH(2*(in5 - in3), icos36h[7]);
-    out[ 0]=
-    out[ 5]= in0 - in5;
-    out[ 6]=
-    out[11]= in0 + in5;
-}
-
-/* cos(pi*i/18) */
-#define C1 FIXHR(0.98480775301220805936/2)
-#define C2 FIXHR(0.93969262078590838405/2)
-#define C3 FIXHR(0.86602540378443864676/2)
-#define C4 FIXHR(0.76604444311897803520/2)
-#define C5 FIXHR(0.64278760968653932632/2)
-#define C6 FIXHR(0.5/2)
-#define C7 FIXHR(0.34202014332566873304/2)
-#define C8 FIXHR(0.17364817766693034885/2)
-
-
-/* using Lee like decomposition followed by hand coded 9 points DCT */
-static void imdct36(int *out, int *buf, int *in, int *win)
-{
-    int i, j, t0, t1, t2, t3, s0, s1, s2, s3;
-    int tmp[18], *tmp1, *in1;
-
-    for(i=17;i>=1;i--)
-        in[i] += in[i-1];
-    for(i=17;i>=3;i-=2)
-        in[i] += in[i-2];
-
-    for(j=0;j<2;j++) {
-        tmp1 = tmp + j;
-        in1 = in + j;
-#if 0
-//more accurate but slower
-        int64_t t0, t1, t2, t3;
-        t2 = in1[2*4] + in1[2*8] - in1[2*2];
-
-        t3 = (in1[2*0] + (int64_t)(in1[2*6]>>1))<<32;
-        t1 = in1[2*0] - in1[2*6];
-        tmp1[ 6] = t1 - (t2>>1);
-        tmp1[16] = t1 + t2;
-
-        t0 = MUL64(2*(in1[2*2] + in1[2*4]),    C2);
-        t1 = MUL64(   in1[2*4] - in1[2*8] , -2*C8);
-        t2 = MUL64(2*(in1[2*2] + in1[2*8]),   -C4);
-
-        tmp1[10] = (t3 - t0 - t2) >> 32;
-        tmp1[ 2] = (t3 + t0 + t1) >> 32;
-        tmp1[14] = (t3 + t2 - t1) >> 32;
-
-        tmp1[ 4] = MULH(2*(in1[2*5] + in1[2*7] - in1[2*1]), -C3);
-        t2 = MUL64(2*(in1[2*1] + in1[2*5]),    C1);
-        t3 = MUL64(   in1[2*5] - in1[2*7] , -2*C7);
-        t0 = MUL64(2*in1[2*3], C3);
-
-        t1 = MUL64(2*(in1[2*1] + in1[2*7]),   -C5);
-
-        tmp1[ 0] = (t2 + t3 + t0) >> 32;
-        tmp1[12] = (t2 + t1 - t0) >> 32;
-        tmp1[ 8] = (t3 - t1 - t0) >> 32;
-#else
-        t2 = in1[2*4] + in1[2*8] - in1[2*2];
-
-        t3 = in1[2*0] + (in1[2*6]>>1);
-        t1 = in1[2*0] - in1[2*6];
-        tmp1[ 6] = t1 - (t2>>1);
-        tmp1[16] = t1 + t2;
-
-        t0 = MULH(2*(in1[2*2] + in1[2*4]),    C2);
-        t1 = MULH(   in1[2*4] - in1[2*8] , -2*C8);
-        t2 = MULH(2*(in1[2*2] + in1[2*8]),   -C4);
-
-        tmp1[10] = t3 - t0 - t2;
-        tmp1[ 2] = t3 + t0 + t1;
-        tmp1[14] = t3 + t2 - t1;
-
-        tmp1[ 4] = MULH(2*(in1[2*5] + in1[2*7] - in1[2*1]), -C3);
-        t2 = MULH(2*(in1[2*1] + in1[2*5]),    C1);
-        t3 = MULH(   in1[2*5] - in1[2*7] , -2*C7);
-        t0 = MULH(2*in1[2*3], C3);
-
-        t1 = MULH(2*(in1[2*1] + in1[2*7]),   -C5);
-
-        tmp1[ 0] = t2 + t3 + t0;
-        tmp1[12] = t2 + t1 - t0;
-        tmp1[ 8] = t3 - t1 - t0;
-#endif
-    }
-
-    i = 0;
-    for(j=0;j<4;j++) {
-        t0 = tmp[i];
-        t1 = tmp[i + 2];
-        s0 = t1 + t0;
-        s2 = t1 - t0;
-
-        t2 = tmp[i + 1];
-        t3 = tmp[i + 3];
-        s1 = MULH(2*(t3 + t2), icos36h[j]);
-        s3 = MULL(t3 - t2, icos36[8 - j]);
-
-        t0 = s0 + s1;
-        t1 = s0 - s1;
-        out[(9 + j)*SBLIMIT] =  MULH(t1, win[9 + j]) + buf[9 + j];
-        out[(8 - j)*SBLIMIT] =  MULH(t1, win[8 - j]) + buf[8 - j];
-        buf[9 + j] = MULH(t0, win[18 + 9 + j]);
-        buf[8 - j] = MULH(t0, win[18 + 8 - j]);
-
-        t0 = s2 + s3;
-        t1 = s2 - s3;
-        out[(9 + 8 - j)*SBLIMIT] =  MULH(t1, win[9 + 8 - j]) + buf[9 + 8 - j];
-        out[(        j)*SBLIMIT] =  MULH(t1, win[        j]) + buf[        j];
-        buf[9 + 8 - j] = MULH(t0, win[18 + 9 + 8 - j]);
-        buf[      + j] = MULH(t0, win[18         + j]);
-        i += 4;
-    }
-
-    s0 = tmp[16];
-    s1 = MULH(2*tmp[17], icos36h[4]);
-    t0 = s0 + s1;
-    t1 = s0 - s1;
-    out[(9 + 4)*SBLIMIT] =  MULH(t1, win[9 + 4]) + buf[9 + 4];
-    out[(8 - 4)*SBLIMIT] =  MULH(t1, win[8 - 4]) + buf[8 - 4];
-    buf[9 + 4] = MULH(t0, win[18 + 9 + 4]);
-    buf[8 - 4] = MULH(t0, win[18 + 8 - 4]);
-}
-
-/* return the number of decoded frames */
-static int mp_decode_layer1(MPADecodeContext *s)
-{
-    int bound, i, v, n, ch, j, mant;
-    uint8_t allocation[MPA_MAX_CHANNELS][SBLIMIT];
-    uint8_t scale_factors[MPA_MAX_CHANNELS][SBLIMIT];
-
-    if (s->mode == MPA_JSTEREO)
-        bound = (s->mode_ext + 1) * 4;
-    else
-        bound = SBLIMIT;
-
-    /* allocation bits */
-    for(i=0;i<bound;i++) {
-        for(ch=0;ch<s->nb_channels;ch++) {
-            allocation[ch][i] = get_bits(&s->gb, 4);
-        }
-    }
-    for(i=bound;i<SBLIMIT;i++) {
-        allocation[0][i] = get_bits(&s->gb, 4);
-    }
-
-    /* scale factors */
-    for(i=0;i<bound;i++) {
-        for(ch=0;ch<s->nb_channels;ch++) {
-            if (allocation[ch][i])
-                scale_factors[ch][i] = get_bits(&s->gb, 6);
-        }
-    }
-    for(i=bound;i<SBLIMIT;i++) {
-        if (allocation[0][i]) {
-            scale_factors[0][i] = get_bits(&s->gb, 6);
-            scale_factors[1][i] = get_bits(&s->gb, 6);
-        }
-    }
-
-    /* compute samples */
-    for(j=0;j<12;j++) {
-        for(i=0;i<bound;i++) {
-            for(ch=0;ch<s->nb_channels;ch++) {
-                n = allocation[ch][i];
-                if (n) {
-                    mant = get_bits(&s->gb, n + 1);
-                    v = l1_unscale(n, mant, scale_factors[ch][i]);
-                } else {
-                    v = 0;
-                }
-                s->sb_samples[ch][j][i] = v;
-            }
-        }
-        for(i=bound;i<SBLIMIT;i++) {
-            n = allocation[0][i];
-            if (n) {
-                mant = get_bits(&s->gb, n + 1);
-                v = l1_unscale(n, mant, scale_factors[0][i]);
-                s->sb_samples[0][j][i] = v;
-                v = l1_unscale(n, mant, scale_factors[1][i]);
-                s->sb_samples[1][j][i] = v;
-            } else {
-                s->sb_samples[0][j][i] = 0;
-                s->sb_samples[1][j][i] = 0;
-            }
-        }
-    }
-    return 12;
-}
 
 /* bitrate is in kb/s */
-int l2_select_table(int bitrate, int nb_channels, int freq, int lsf)
+int ff_mpa_l2_select_table(int bitrate, int nb_channels, int freq, int lsf)
 {
     int ch_bitrate, table;
 
@@ -1161,1567 +48,3 @@ int l2_select_table(int bitrate, int nb_
     }
     return table;
 }
-
-static int mp_decode_layer2(MPADecodeContext *s)
-{
-    int sblimit; /* number of used subbands */
-    const unsigned char *alloc_table;
-    int table, bit_alloc_bits, i, j, ch, bound, v;
-    unsigned char bit_alloc[MPA_MAX_CHANNELS][SBLIMIT];
-    unsigned char scale_code[MPA_MAX_CHANNELS][SBLIMIT];
-    unsigned char scale_factors[MPA_MAX_CHANNELS][SBLIMIT][3], *sf;
-    int scale, qindex, bits, steps, k, l, m, b;
-
-    /* select decoding table */
-    table = l2_select_table(s->bit_rate / 1000, s->nb_channels,
-                            s->sample_rate, s->lsf);
-    sblimit = ff_mpa_sblimit_table[table];
-    alloc_table = ff_mpa_alloc_tables[table];
-
-    if (s->mode == MPA_JSTEREO)
-        bound = (s->mode_ext + 1) * 4;
-    else
-        bound = sblimit;
-
-    dprintf(s->avctx, "bound=%d sblimit=%d\n", bound, sblimit);
-
-    /* sanity check */
-    if( bound > sblimit ) bound = sblimit;
-
-    /* parse bit allocation */
-    j = 0;
-    for(i=0;i<bound;i++) {
-        bit_alloc_bits = alloc_table[j];
-        for(ch=0;ch<s->nb_channels;ch++) {
-            bit_alloc[ch][i] = get_bits(&s->gb, bit_alloc_bits);
-        }
-        j += 1 << bit_alloc_bits;
-    }
-    for(i=bound;i<sblimit;i++) {
-        bit_alloc_bits = alloc_table[j];
-        v = get_bits(&s->gb, bit_alloc_bits);
-        bit_alloc[0][i] = v;
-        bit_alloc[1][i] = v;
-        j += 1 << bit_alloc_bits;
-    }
-
-#ifdef DEBUG
-    {
-        for(ch=0;ch<s->nb_channels;ch++) {
-            for(i=0;i<sblimit;i++)
-                dprintf(s->avctx, " %d", bit_alloc[ch][i]);
-            dprintf(s->avctx, "\n");
-        }
-    }
-#endif
-
-    /* scale codes */
-    for(i=0;i<sblimit;i++) {
-        for(ch=0;ch<s->nb_channels;ch++) {
-            if (bit_alloc[ch][i])
-                scale_code[ch][i] = get_bits(&s->gb, 2);
-        }
-    }
-
-    /* scale factors */
-    for(i=0;i<sblimit;i++) {
-        for(ch=0;ch<s->nb_channels;ch++) {
-            if (bit_alloc[ch][i]) {
-                sf = scale_factors[ch][i];
-                switch(scale_code[ch][i]) {
-                default:
-                case 0:
-                    sf[0] = get_bits(&s->gb, 6);
-                    sf[1] = get_bits(&s->gb, 6);
-                    sf[2] = get_bits(&s->gb, 6);
-                    break;
-                case 2:
-                    sf[0] = get_bits(&s->gb, 6);
-                    sf[1] = sf[0];
-                    sf[2] = sf[0];
-                    break;
-                case 1:
-                    sf[0] = get_bits(&s->gb, 6);
-                    sf[2] = get_bits(&s->gb, 6);
-                    sf[1] = sf[0];
-                    break;
-                case 3:
-                    sf[0] = get_bits(&s->gb, 6);
-                    sf[2] = get_bits(&s->gb, 6);
-                    sf[1] = sf[2];
-                    break;
-                }
-            }
-        }
-    }
-
-#ifdef DEBUG
-    for(ch=0;ch<s->nb_channels;ch++) {
-        for(i=0;i<sblimit;i++) {
-            if (bit_alloc[ch][i]) {
-                sf = scale_factors[ch][i];
-                dprintf(s->avctx, " %d %d %d", sf[0], sf[1], sf[2]);
-            } else {
-                dprintf(s->avctx, " -");
-            }
-        }
-        dprintf(s->avctx, "\n");
-    }
-#endif
-
-    /* samples */
-    for(k=0;k<3;k++) {
-        for(l=0;l<12;l+=3) {
-            j = 0;
-            for(i=0;i<bound;i++) {
-                bit_alloc_bits = alloc_table[j];
-                for(ch=0;ch<s->nb_channels;ch++) {
-                    b = bit_alloc[ch][i];
-                    if (b) {
-                        scale = scale_factors[ch][i][k];
-                        qindex = alloc_table[j+b];
-                        bits = ff_mpa_quant_bits[qindex];
-                        if (bits < 0) {
-                            /* 3 values at the same time */
-                            v = get_bits(&s->gb, -bits);
-                            steps = ff_mpa_quant_steps[qindex];
-                            s->sb_samples[ch][k * 12 + l + 0][i] =
-                                l2_unscale_group(steps, v % steps, scale);
-                            v = v / steps;
-                            s->sb_samples[ch][k * 12 + l + 1][i] =
-                                l2_unscale_group(steps, v % steps, scale);
-                            v = v / steps;
-                            s->sb_samples[ch][k * 12 + l + 2][i] =
-                                l2_unscale_group(steps, v, scale);
-                        } else {
-                            for(m=0;m<3;m++) {
-                                v = get_bits(&s->gb, bits);
-                                v = l1_unscale(bits - 1, v, scale);
-                                s->sb_samples[ch][k * 12 + l + m][i] = v;
-                            }
-                        }
-                    } else {
-                        s->sb_samples[ch][k * 12 + l + 0][i] = 0;
-                        s->sb_samples[ch][k * 12 + l + 1][i] = 0;
-                        s->sb_samples[ch][k * 12 + l + 2][i] = 0;
-                    }
-                }
-                /* next subband in alloc table */
-                j += 1 << bit_alloc_bits;
-            }
-            /* XXX: find a way to avoid this duplication of code */
-            for(i=bound;i<sblimit;i++) {
-                bit_alloc_bits = alloc_table[j];
-                b = bit_alloc[0][i];
-                if (b) {
-                    int mant, scale0, scale1;
-                    scale0 = scale_factors[0][i][k];
-                    scale1 = scale_factors[1][i][k];
-                    qindex = alloc_table[j+b];
-                    bits = ff_mpa_quant_bits[qindex];
-                    if (bits < 0) {
-                        /* 3 values at the same time */
-                        v = get_bits(&s->gb, -bits);
-                        steps = ff_mpa_quant_steps[qindex];
-                        mant = v % steps;
-                        v = v / steps;
-                        s->sb_samples[0][k * 12 + l + 0][i] =
-                            l2_unscale_group(steps, mant, scale0);
-                        s->sb_samples[1][k * 12 + l + 0][i] =
-                            l2_unscale_group(steps, mant, scale1);
-                        mant = v % steps;
-                        v = v / steps;
-                        s->sb_samples[0][k * 12 + l + 1][i] =
-                            l2_unscale_group(steps, mant, scale0);
-                        s->sb_samples[1][k * 12 + l + 1][i] =
-                            l2_unscale_group(steps, mant, scale1);
-                        s->sb_samples[0][k * 12 + l + 2][i] =
-                            l2_unscale_group(steps, v, scale0);
-                        s->sb_samples[1][k * 12 + l + 2][i] =
-                            l2_unscale_group(steps, v, scale1);
-                    } else {
-                        for(m=0;m<3;m++) {
-                            mant = get_bits(&s->gb, bits);
-                            s->sb_samples[0][k * 12 + l + m][i] =
-                                l1_unscale(bits - 1, mant, scale0);
-                            s->sb_samples[1][k * 12 + l + m][i] =
-                                l1_unscale(bits - 1, mant, scale1);
-                        }
-                    }
-                } else {
-                    s->sb_samples[0][k * 12 + l + 0][i] = 0;
-                    s->sb_samples[0][k * 12 + l + 1][i] = 0;
-                    s->sb_samples[0][k * 12 + l + 2][i] = 0;
-                    s->sb_samples[1][k * 12 + l + 0][i] = 0;
-                    s->sb_samples[1][k * 12 + l + 1][i] = 0;
-                    s->sb_samples[1][k * 12 + l + 2][i] = 0;
-                }
-                /* next subband in alloc table */
-                j += 1 << bit_alloc_bits;
-            }
-            /* fill remaining samples to zero */
-            for(i=sblimit;i<SBLIMIT;i++) {
-                for(ch=0;ch<s->nb_channels;ch++) {
-                    s->sb_samples[ch][k * 12 + l + 0][i] = 0;
-                    s->sb_samples[ch][k * 12 + l + 1][i] = 0;
-                    s->sb_samples[ch][k * 12 + l + 2][i] = 0;
-                }
-            }
-        }
-    }
-    return 3 * 12;
-}
-
-static inline void lsf_sf_expand(int *slen,
-                                 int sf, int n1, int n2, int n3)
-{
-    if (n3) {
-        slen[3] = sf % n3;
-        sf /= n3;
-    } else {
-        slen[3] = 0;
-    }
-    if (n2) {
-        slen[2] = sf % n2;
-        sf /= n2;
-    } else {
-        slen[2] = 0;
-    }
-    slen[1] = sf % n1;
-    sf /= n1;
-    slen[0] = sf;
-}
-
-static void exponents_from_scale_factors(MPADecodeContext *s,
-                                         GranuleDef *g,
-                                         int16_t *exponents)
-{
-    const uint8_t *bstab, *pretab;
-    int len, i, j, k, l, v0, shift, gain, gains[3];
-    int16_t *exp_ptr;
-
-    exp_ptr = exponents;
-    gain = g->global_gain - 210;
-    shift = g->scalefac_scale + 1;
-
-    bstab = band_size_long[s->sample_rate_index];
-    pretab = mpa_pretab[g->preflag];
-    for(i=0;i<g->long_end;i++) {
-        v0 = gain - ((g->scale_factors[i] + pretab[i]) << shift) + 400;
-        len = bstab[i];
-        for(j=len;j>0;j--)
-            *exp_ptr++ = v0;
-    }
-
-    if (g->short_start < 13) {
-        bstab = band_size_short[s->sample_rate_index];
-        gains[0] = gain - (g->subblock_gain[0] << 3);
-        gains[1] = gain - (g->subblock_gain[1] << 3);
-        gains[2] = gain - (g->subblock_gain[2] << 3);
-        k = g->long_end;
-        for(i=g->short_start;i<13;i++) {
-            len = bstab[i];
-            for(l=0;l<3;l++) {
-                v0 = gains[l] - (g->scale_factors[k++] << shift) + 400;
-                for(j=len;j>0;j--)
-                *exp_ptr++ = v0;
-            }
-        }
-    }
-}
-
-/* handle n = 0 too */
-static inline int get_bitsz(GetBitContext *s, int n)
-{
-    if (n == 0)
-        return 0;
-    else
-        return get_bits(s, n);
-}
-
-
-static void switch_buffer(MPADecodeContext *s, int *pos, int *end_pos, int *end_pos2){
-    if(s->in_gb.buffer && *pos >= s->gb.size_in_bits){
-        s->gb= s->in_gb;
-        s->in_gb.buffer=NULL;
-        assert((get_bits_count(&s->gb) & 7) == 0);
-        skip_bits_long(&s->gb, *pos - *end_pos);
-        *end_pos2=
-        *end_pos= *end_pos2 + get_bits_count(&s->gb) - *pos;
-        *pos= get_bits_count(&s->gb);
-    }
-}
-
-static int huffman_decode(MPADecodeContext *s, GranuleDef *g,
-                          int16_t *exponents, int end_pos2)
-{
-    int s_index;
-    int i;
-    int last_pos, bits_left;
-    VLC *vlc;
-    int end_pos= FFMIN(end_pos2, s->gb.size_in_bits);
-
-    /* low frequencies (called big values) */
-    s_index = 0;
-    for(i=0;i<3;i++) {
-        int j, k, l, linbits;
-        j = g->region_size[i];
-        if (j == 0)
-            continue;
-        /* select vlc table */
-        k = g->table_select[i];
-        l = mpa_huff_data[k][0];
-        linbits = mpa_huff_data[k][1];
-        vlc = &huff_vlc[l];
-
-        if(!l){
-            memset(&g->sb_hybrid[s_index], 0, sizeof(*g->sb_hybrid)*2*j);
-            s_index += 2*j;
-            continue;
-        }
-
-        /* read huffcode and compute each couple */
-        for(;j>0;j--) {
-            int exponent, x, y, v;
-            int pos= get_bits_count(&s->gb);
-
-            if (pos >= end_pos){
-//                av_log(NULL, AV_LOG_ERROR, "pos: %d %d %d %d\n", pos, end_pos, end_pos2, s_index);
-                switch_buffer(s, &pos, &end_pos, &end_pos2);
-//                av_log(NULL, AV_LOG_ERROR, "new pos: %d %d\n", pos, end_pos);
-                if(pos >= end_pos)
-                    break;
-            }
-            y = get_vlc2(&s->gb, vlc->table, 7, 3);
-
-            if(!y){
-                g->sb_hybrid[s_index  ] =
-                g->sb_hybrid[s_index+1] = 0;
-                s_index += 2;
-                continue;
-            }
-
-            exponent= exponents[s_index];
-
-            dprintf(s->avctx, "region=%d n=%d x=%d y=%d exp=%d\n",
-                    i, g->region_size[i] - j, x, y, exponent);
-            if(y&16){
-                x = y >> 5;
-                y = y & 0x0f;
-                if (x < 15){
-                    v = expval_table[ exponent ][ x ];
-//                      v = expval_table[ (exponent&3) ][ x ] >> FFMIN(0 - (exponent>>2), 31);
-                }else{
-                    x += get_bitsz(&s->gb, linbits);
-                    v = l3_unscale(x, exponent);
-                }
-                if (get_bits1(&s->gb))
-                    v = -v;
-                g->sb_hybrid[s_index] = v;
-                if (y < 15){
-                    v = expval_table[ exponent ][ y ];
-                }else{
-                    y += get_bitsz(&s->gb, linbits);
-                    v = l3_unscale(y, exponent);
-                }
-                if (get_bits1(&s->gb))
-                    v = -v;
-                g->sb_hybrid[s_index+1] = v;
-            }else{
-                x = y >> 5;
-                y = y & 0x0f;
-                x += y;
-                if (x < 15){
-                    v = expval_table[ exponent ][ x ];
-                }else{
-                    x += get_bitsz(&s->gb, linbits);
-                    v = l3_unscale(x, exponent);
-                }
-                if (get_bits1(&s->gb))
-                    v = -v;
-                g->sb_hybrid[s_index+!!y] = v;
-                g->sb_hybrid[s_index+ !y] = 0;
-            }
-            s_index+=2;
-        }
-    }
-
-    /* high frequencies */
-    vlc = &huff_quad_vlc[g->count1table_select];
-    last_pos=0;
-    while (s_index <= 572) {
-        int pos, code;
-        pos = get_bits_count(&s->gb);
-        if (pos >= end_pos) {
-            if (pos > end_pos2 && last_pos){
-                /* some encoders generate an incorrect size for this
-                   part. We must go back into the data */
-                s_index -= 4;
-                skip_bits_long(&s->gb, last_pos - pos);
-                av_log(NULL, AV_LOG_INFO, "overread, skip %d enddists: %d %d\n", last_pos - pos, end_pos-pos, end_pos2-pos);
-                if(s->error_resilience >= FF_ER_COMPLIANT)
-                    s_index=0;
-                break;
-            }
-//                av_log(NULL, AV_LOG_ERROR, "pos2: %d %d %d %d\n", pos, end_pos, end_pos2, s_index);
-            switch_buffer(s, &pos, &end_pos, &end_pos2);
-//                av_log(NULL, AV_LOG_ERROR, "new pos2: %d %d %d\n", pos, end_pos, s_index);
-            if(pos >= end_pos)
-                break;
-        }
-        last_pos= pos;
-
-        code = get_vlc2(&s->gb, vlc->table, vlc->bits, 1);
-        dprintf(s->avctx, "t=%d code=%d\n", g->count1table_select, code);
-        g->sb_hybrid[s_index+0]=
-        g->sb_hybrid[s_index+1]=
-        g->sb_hybrid[s_index+2]=
-        g->sb_hybrid[s_index+3]= 0;
-        while(code){
-            static const int idxtab[16]={3,3,2,2,1,1,1,1,0,0,0,0,0,0,0,0};
-            int v;
-            int pos= s_index+idxtab[code];
-            code ^= 8>>idxtab[code];
-            v = exp_table[ exponents[pos] ];
-//            v = exp_table[ (exponents[pos]&3) ] >> FFMIN(0 - (exponents[pos]>>2), 31);
-            if(get_bits1(&s->gb))
-                v = -v;
-            g->sb_hybrid[pos] = v;
-        }
-        s_index+=4;
-    }
-    /* skip extension bits */
-    bits_left = end_pos2 - get_bits_count(&s->gb);
-//av_log(NULL, AV_LOG_ERROR, "left:%d buf:%p\n", bits_left, s->in_gb.buffer);
-    if (bits_left < 0/* || bits_left > 500*/) {
-        av_log(NULL, AV_LOG_ERROR, "bits_left=%d\n", bits_left);
-        s_index=0;
-    }else if(bits_left > 0 && s->error_resilience >= FF_ER_AGGRESSIVE){
-        av_log(NULL, AV_LOG_ERROR, "bits_left=%d\n", bits_left);
-        s_index=0;
-    }
-    memset(&g->sb_hybrid[s_index], 0, sizeof(*g->sb_hybrid)*(576 - s_index));
-    skip_bits_long(&s->gb, bits_left);
-
-    i= get_bits_count(&s->gb);
-    switch_buffer(s, &i, &end_pos, &end_pos2);
-
-    return 0;
-}
-
-/* Reorder short blocks from bitstream order to interleaved order. It
-   would be faster to do it in parsing, but the code would be far more
-   complicated */
-static void reorder_block(MPADecodeContext *s, GranuleDef *g)
-{
-    int i, j, len;
-    int32_t *ptr, *dst, *ptr1;
-    int32_t tmp[576];
-
-    if (g->block_type != 2)
-        return;
-
-    if (g->switch_point) {
-        if (s->sample_rate_index != 8) {
-            ptr = g->sb_hybrid + 36;
-        } else {
-            ptr = g->sb_hybrid + 48;
-        }
-    } else {
-        ptr = g->sb_hybrid;
-    }
-
-    for(i=g->short_start;i<13;i++) {
-        len = band_size_short[s->sample_rate_index][i];
-        ptr1 = ptr;
-        dst = tmp;
-        for(j=len;j>0;j--) {
-            *dst++ = ptr[0*len];
-            *dst++ = ptr[1*len];
-            *dst++ = ptr[2*len];
-            ptr++;
-        }
-        ptr+=2*len;
-        memcpy(ptr1, tmp, len * 3 * sizeof(*ptr1));
-    }
-}
-
-#define ISQRT2 FIXR(0.70710678118654752440)
-
-static void compute_stereo(MPADecodeContext *s,
-                           GranuleDef *g0, GranuleDef *g1)
-{
-    int i, j, k, l;
-    int32_t v1, v2;
-    int sf_max, tmp0, tmp1, sf, len, non_zero_found;
-    int32_t (*is_tab)[16];
-    int32_t *tab0, *tab1;
-    int non_zero_found_short[3];
-
-    /* intensity stereo */
-    if (s->mode_ext & MODE_EXT_I_STEREO) {
-        if (!s->lsf) {
-            is_tab = is_table;
-            sf_max = 7;
-        } else {
-            is_tab = is_table_lsf[g1->scalefac_compress & 1];
-            sf_max = 16;
-        }
-
-        tab0 = g0->sb_hybrid + 576;
-        tab1 = g1->sb_hybrid + 576;
-
-        non_zero_found_short[0] = 0;
-        non_zero_found_short[1] = 0;
-        non_zero_found_short[2] = 0;
-        k = (13 - g1->short_start) * 3 + g1->long_end - 3;
-        for(i = 12;i >= g1->short_start;i--) {
-            /* for last band, use previous scale factor */
-            if (i != 11)
-                k -= 3;
-            len = band_size_short[s->sample_rate_index][i];
-            for(l=2;l>=0;l--) {
-                tab0 -= len;
-                tab1 -= len;
-                if (!non_zero_found_short[l]) {
-                    /* test if non zero band. if so, stop doing i-stereo */
-                    for(j=0;j<len;j++) {
-                        if (tab1[j] != 0) {
-                            non_zero_found_short[l] = 1;
-                            goto found1;
-                        }
-                    }
-                    sf = g1->scale_factors[k + l];
-                    if (sf >= sf_max)
-                        goto found1;
-
-                    v1 = is_tab[0][sf];
-                    v2 = is_tab[1][sf];
-                    for(j=0;j<len;j++) {
-                        tmp0 = tab0[j];
-                        tab0[j] = MULL(tmp0, v1);
-                        tab1[j] = MULL(tmp0, v2);
-                    }
-                } else {
-                found1:
-                    if (s->mode_ext & MODE_EXT_MS_STEREO) {
-                        /* lower part of the spectrum : do ms stereo
-                           if enabled */
-                        for(j=0;j<len;j++) {
-                            tmp0 = tab0[j];
-                            tmp1 = tab1[j];
-                            tab0[j] = MULL(tmp0 + tmp1, ISQRT2);
-                            tab1[j] = MULL(tmp0 - tmp1, ISQRT2);
-                        }
-                    }
-                }
-            }
-        }
-
-        non_zero_found = non_zero_found_short[0] |
-            non_zero_found_short[1] |
-            non_zero_found_short[2];
-
-        for(i = g1->long_end - 1;i >= 0;i--) {
-            len = band_size_long[s->sample_rate_index][i];
-            tab0 -= len;
-            tab1 -= len;
-            /* test if non zero band. if so, stop doing i-stereo */
-            if (!non_zero_found) {
-                for(j=0;j<len;j++) {
-                    if (tab1[j] != 0) {
-                        non_zero_found = 1;
-                        goto found2;
-                    }
-                }
-                /* for last band, use previous scale factor */
-                k = (i == 21) ? 20 : i;
-                sf = g1->scale_factors[k];
-                if (sf >= sf_max)
-                    goto found2;
-                v1 = is_tab[0][sf];
-                v2 = is_tab[1][sf];
-                for(j=0;j<len;j++) {
-                    tmp0 = tab0[j];
-                    tab0[j] = MULL(tmp0, v1);
-                    tab1[j] = MULL(tmp0, v2);
-                }
-            } else {
-            found2:
-                if (s->mode_ext & MODE_EXT_MS_STEREO) {
-                    /* lower part of the spectrum : do ms stereo
-                       if enabled */
-                    for(j=0;j<len;j++) {
-                        tmp0 = tab0[j];
-                        tmp1 = tab1[j];
-                        tab0[j] = MULL(tmp0 + tmp1, ISQRT2);
-                        tab1[j] = MULL(tmp0 - tmp1, ISQRT2);
-                    }
-                }
-            }
-        }
-    } else if (s->mode_ext & MODE_EXT_MS_STEREO) {
-        /* ms stereo ONLY */
-        /* NOTE: the 1/sqrt(2) normalization factor is included in the
-           global gain */
-        tab0 = g0->sb_hybrid;
-        tab1 = g1->sb_hybrid;
-        for(i=0;i<576;i++) {
-            tmp0 = tab0[i];
-            tmp1 = tab1[i];
-            tab0[i] = tmp0 + tmp1;
-            tab1[i] = tmp0 - tmp1;
-        }
-    }
-}
-
-static void compute_antialias_integer(MPADecodeContext *s,
-                              GranuleDef *g)
-{
-    int32_t *ptr, *csa;
-    int n, i;
-
-    /* we antialias only "long" bands */
-    if (g->block_type == 2) {
-        if (!g->switch_point)
-            return;
-        /* XXX: check this for 8000Hz case */
-        n = 1;
-    } else {
-        n = SBLIMIT - 1;
-    }
-
-    ptr = g->sb_hybrid + 18;
-    for(i = n;i > 0;i--) {
-        int tmp0, tmp1, tmp2;
-        csa = &csa_table[0][0];
-#define INT_AA(j) \
-            tmp0 = ptr[-1-j];\
-            tmp1 = ptr[   j];\
-            tmp2= MULH(tmp0 + tmp1, csa[0+4*j]);\
-            ptr[-1-j] = 4*(tmp2 - MULH(tmp1, csa[2+4*j]));\
-            ptr[   j] = 4*(tmp2 + MULH(tmp0, csa[3+4*j]));
-
-        INT_AA(0)
-        INT_AA(1)
-        INT_AA(2)
-        INT_AA(3)
-        INT_AA(4)
-        INT_AA(5)
-        INT_AA(6)
-        INT_AA(7)
-
-        ptr += 18;
-    }
-}
-
-static void compute_antialias_float(MPADecodeContext *s,
-                              GranuleDef *g)
-{
-    int32_t *ptr;
-    int n, i;
-
-    /* we antialias only "long" bands */
-    if (g->block_type == 2) {
-        if (!g->switch_point)
-            return;
-        /* XXX: check this for 8000Hz case */
-        n = 1;
-    } else {
-        n = SBLIMIT - 1;
-    }
-
-    ptr = g->sb_hybrid + 18;
-    for(i = n;i > 0;i--) {
-        float tmp0, tmp1;
-        float *csa = &csa_table_float[0][0];
-#define FLOAT_AA(j)\
-        tmp0= ptr[-1-j];\
-        tmp1= ptr[   j];\
-        ptr[-1-j] = lrintf(tmp0 * csa[0+4*j] - tmp1 * csa[1+4*j]);\
-        ptr[   j] = lrintf(tmp0 * csa[1+4*j] + tmp1 * csa[0+4*j]);
-
-        FLOAT_AA(0)
-        FLOAT_AA(1)
-        FLOAT_AA(2)
-        FLOAT_AA(3)
-        FLOAT_AA(4)
-        FLOAT_AA(5)
-        FLOAT_AA(6)
-        FLOAT_AA(7)
-
-        ptr += 18;
-    }
-}
-
-static void compute_imdct(MPADecodeContext *s,
-                          GranuleDef *g,
-                          int32_t *sb_samples,
-                          int32_t *mdct_buf)
-{
-    int32_t *ptr, *win, *win1, *buf, *out_ptr, *ptr1;
-    int32_t out2[12];
-    int i, j, mdct_long_end, v, sblimit;
-
-    /* find last non zero block */
-    ptr = g->sb_hybrid + 576;
-    ptr1 = g->sb_hybrid + 2 * 18;
-    while (ptr >= ptr1) {
-        ptr -= 6;
-        v = ptr[0] | ptr[1] | ptr[2] | ptr[3] | ptr[4] | ptr[5];
-        if (v != 0)
-            break;
-    }
-    sblimit = ((ptr - g->sb_hybrid) / 18) + 1;
-
-    if (g->block_type == 2) {
-        /* XXX: check for 8000 Hz */
-        if (g->switch_point)
-            mdct_long_end = 2;
-        else
-            mdct_long_end = 0;
-    } else {
-        mdct_long_end = sblimit;
-    }
-
-    buf = mdct_buf;
-    ptr = g->sb_hybrid;
-    for(j=0;j<mdct_long_end;j++) {
-        /* apply window & overlap with previous buffer */
-        out_ptr = sb_samples + j;
-        /* select window */
-        if (g->switch_point && j < 2)
-            win1 = mdct_win[0];
-        else
-            win1 = mdct_win[g->block_type];
-        /* select frequency inversion */
-        win = win1 + ((4 * 36) & -(j & 1));
-        imdct36(out_ptr, buf, ptr, win);
-        out_ptr += 18*SBLIMIT;
-        ptr += 18;
-        buf += 18;
-    }
-    for(j=mdct_long_end;j<sblimit;j++) {
-        /* select frequency inversion */
-        win = mdct_win[2] + ((4 * 36) & -(j & 1));
-        out_ptr = sb_samples + j;
-
-        for(i=0; i<6; i++){
-            *out_ptr = buf[i];
-            out_ptr += SBLIMIT;
-        }
-        imdct12(out2, ptr + 0);
-        for(i=0;i<6;i++) {
-            *out_ptr = MULH(out2[i], win[i]) + buf[i + 6*1];
-            buf[i + 6*2] = MULH(out2[i + 6], win[i + 6]);
-            out_ptr += SBLIMIT;
-        }
-        imdct12(out2, ptr + 1);
-        for(i=0;i<6;i++) {
-            *out_ptr = MULH(out2[i], win[i]) + buf[i + 6*2];
-            buf[i + 6*0] = MULH(out2[i + 6], win[i + 6]);
-            out_ptr += SBLIMIT;
-        }
-        imdct12(out2, ptr + 2);
-        for(i=0;i<6;i++) {
-            buf[i + 6*0] = MULH(out2[i], win[i]) + buf[i + 6*0];
-            buf[i + 6*1] = MULH(out2[i + 6], win[i + 6]);
-            buf[i + 6*2] = 0;
-        }
-        ptr += 18;
-        buf += 18;
-    }
-    /* zero bands */
-    for(j=sblimit;j<SBLIMIT;j++) {
-        /* overlap */
-        out_ptr = sb_samples + j;
-        for(i=0;i<18;i++) {
-            *out_ptr = buf[i];
-            buf[i] = 0;
-            out_ptr += SBLIMIT;
-        }
-        buf += 18;
-    }
-}
-
-#if defined(DEBUG)
-void sample_dump(int fnum, int32_t *tab, int n)
-{
-    static FILE *files[16], *f;
-    char buf[512];
-    int i;
-    int32_t v;
-
-    f = files[fnum];
-    if (!f) {
-        snprintf(buf, sizeof(buf), "/tmp/out%d.%s.pcm",
-                fnum,
-#ifdef USE_HIGHPRECISION
-                "hp"
-#else
-                "lp"
-#endif
-                );
-        f = fopen(buf, "w");
-        if (!f)
-            return;
-        files[fnum] = f;
-    }
-
-    if (fnum == 0) {
-        static int pos = 0;
-        av_log(NULL, AV_LOG_DEBUG, "pos=%d\n", pos);
-        for(i=0;i<n;i++) {
-            av_log(NULL, AV_LOG_DEBUG, " %0.4f", (double)tab[i] / FRAC_ONE);
-            if ((i % 18) == 17)
-                av_log(NULL, AV_LOG_DEBUG, "\n");
-        }
-        pos += n;
-    }
-    for(i=0;i<n;i++) {
-        /* normalize to 23 frac bits */
-        v = tab[i] << (23 - FRAC_BITS);
-        fwrite(&v, 1, sizeof(int32_t), f);
-    }
-}
-#endif
-
-
-/* main layer3 decoding function */
-static int mp_decode_layer3(MPADecodeContext *s)
-{
-    int nb_granules, main_data_begin, private_bits;
-    int gr, ch, blocksplit_flag, i, j, k, n, bits_pos;
-    GranuleDef granules[2][2], *g;
-    int16_t exponents[576];
-
-    /* read side info */
-    if (s->lsf) {
-        main_data_begin = get_bits(&s->gb, 8);
-        private_bits = get_bits(&s->gb, s->nb_channels);
-        nb_granules = 1;
-    } else {
-        main_data_begin = get_bits(&s->gb, 9);
-        if (s->nb_channels == 2)
-            private_bits = get_bits(&s->gb, 3);
-        else
-            private_bits = get_bits(&s->gb, 5);
-        nb_granules = 2;
-        for(ch=0;ch<s->nb_channels;ch++) {
-            granules[ch][0].scfsi = 0; /* all scale factors are transmitted */
-            granules[ch][1].scfsi = get_bits(&s->gb, 4);
-        }
-    }
-
-    for(gr=0;gr<nb_granules;gr++) {
-        for(ch=0;ch<s->nb_channels;ch++) {
-            dprintf(s->avctx, "gr=%d ch=%d: side_info\n", gr, ch);
-            g = &granules[ch][gr];
-            g->part2_3_length = get_bits(&s->gb, 12);
-            g->big_values = get_bits(&s->gb, 9);
-            if(g->big_values > 288){
-                av_log(s->avctx, AV_LOG_ERROR, "big_values too big\n");
-                return -1;
-            }
-
-            g->global_gain = get_bits(&s->gb, 8);
-            /* if MS stereo only is selected, we precompute the
-               1/sqrt(2) renormalization factor */
-            if ((s->mode_ext & (MODE_EXT_MS_STEREO | MODE_EXT_I_STEREO)) ==
-                MODE_EXT_MS_STEREO)
-                g->global_gain -= 2;
-            if (s->lsf)
-                g->scalefac_compress = get_bits(&s->gb, 9);
-            else
-                g->scalefac_compress = get_bits(&s->gb, 4);
-            blocksplit_flag = get_bits(&s->gb, 1);
-            if (blocksplit_flag) {
-                g->block_type = get_bits(&s->gb, 2);
-                if (g->block_type == 0){
-                    av_log(NULL, AV_LOG_ERROR, "invalid block type\n");
-                    return -1;
-                }
-                g->switch_point = get_bits(&s->gb, 1);
-                for(i=0;i<2;i++)
-                    g->table_select[i] = get_bits(&s->gb, 5);
-                for(i=0;i<3;i++)
-                    g->subblock_gain[i] = get_bits(&s->gb, 3);
-                /* compute huffman coded region sizes */
-                if (g->block_type == 2)
-                    g->region_size[0] = (36 / 2);
-                else {
-                    if (s->sample_rate_index <= 2)
-                        g->region_size[0] = (36 / 2);
-                    else if (s->sample_rate_index != 8)
-                        g->region_size[0] = (54 / 2);
-                    else
-                        g->region_size[0] = (108 / 2);
-                }
-                g->region_size[1] = (576 / 2);
-            } else {
-                int region_address1, region_address2, l;
-                g->block_type = 0;
-                g->switch_point = 0;
-                for(i=0;i<3;i++)
-                    g->table_select[i] = get_bits(&s->gb, 5);
-                /* compute huffman coded region sizes */
-                region_address1 = get_bits(&s->gb, 4);
-                region_address2 = get_bits(&s->gb, 3);
-                dprintf(s->avctx, "region1=%d region2=%d\n",
-                        region_address1, region_address2);
-                g->region_size[0] =
-                    band_index_long[s->sample_rate_index][region_address1 + 1] >> 1;
-                l = region_address1 + region_address2 + 2;
-                /* should not overflow */
-                if (l > 22)
-                    l = 22;
-                g->region_size[1] =
-                    band_index_long[s->sample_rate_index][l] >> 1;
-            }
-            /* convert region offsets to region sizes and truncate
-               size to big_values */
-            g->region_size[2] = (576 / 2);
-            j = 0;
-            for(i=0;i<3;i++) {
-                k = FFMIN(g->region_size[i], g->big_values);
-                g->region_size[i] = k - j;
-                j = k;
-            }
-
-            /* compute band indexes */
-            if (g->block_type == 2) {
-                if (g->switch_point) {
-                    /* if switched mode, we handle the 36 first samples as
-                       long blocks.  For 8000Hz, we handle the 48 first
-                       exponents as long blocks (XXX: check this!) */
-                    if (s->sample_rate_index <= 2)
-                        g->long_end = 8;
-                    else if (s->sample_rate_index != 8)
-                        g->long_end = 6;
-                    else
-                        g->long_end = 4; /* 8000 Hz */
-
-                    g->short_start = 2 + (s->sample_rate_index != 8);
-                } else {
-                    g->long_end = 0;
-                    g->short_start = 0;
-                }
-            } else {
-                g->short_start = 13;
-                g->long_end = 22;
-            }
-
-            g->preflag = 0;
-            if (!s->lsf)
-                g->preflag = get_bits(&s->gb, 1);
-            g->scalefac_scale = get_bits(&s->gb, 1);
-            g->count1table_select = get_bits(&s->gb, 1);
-            dprintf(s->avctx, "block_type=%d switch_point=%d\n",
-                    g->block_type, g->switch_point);
-        }
-    }
-
-  if (!s->adu_mode) {
-    const uint8_t *ptr = s->gb.buffer + (get_bits_count(&s->gb)>>3);
-    assert((get_bits_count(&s->gb) & 7) == 0);
-    /* now we get bits from the main_data_begin offset */
-    dprintf(s->avctx, "seekback: %d\n", main_data_begin);
-//av_log(NULL, AV_LOG_ERROR, "backstep:%d, lastbuf:%d\n", main_data_begin, s->last_buf_size);
-
-    memcpy(s->last_buf + s->last_buf_size, ptr, EXTRABYTES);
-    s->in_gb= s->gb;
-        init_get_bits(&s->gb, s->last_buf, s->last_buf_size*8);
-        skip_bits_long(&s->gb, 8*(s->last_buf_size - main_data_begin));
-  }
-
-    for(gr=0;gr<nb_granules;gr++) {
-        for(ch=0;ch<s->nb_channels;ch++) {
-            g = &granules[ch][gr];
-            if(get_bits_count(&s->gb)<0){
-                av_log(NULL, AV_LOG_ERROR, "mdb:%d, lastbuf:%d skipping granule %d\n",
-                                            main_data_begin, s->last_buf_size, gr);
-                skip_bits_long(&s->gb, g->part2_3_length);
-                memset(g->sb_hybrid, 0, sizeof(g->sb_hybrid));
-                if(get_bits_count(&s->gb) >= s->gb.size_in_bits && s->in_gb.buffer){
-                    skip_bits_long(&s->in_gb, get_bits_count(&s->gb) - s->gb.size_in_bits);
-                    s->gb= s->in_gb;
-                    s->in_gb.buffer=NULL;
-                }
-                continue;
-            }
-
-            bits_pos = get_bits_count(&s->gb);
-
-            if (!s->lsf) {
-                uint8_t *sc;
-                int slen, slen1, slen2;
-
-                /* MPEG1 scale factors */
-                slen1 = slen_table[0][g->scalefac_compress];
-                slen2 = slen_table[1][g->scalefac_compress];
-                dprintf(s->avctx, "slen1=%d slen2=%d\n", slen1, slen2);
-                if (g->block_type == 2) {
-                    n = g->switch_point ? 17 : 18;
-                    j = 0;
-                    if(slen1){
-                        for(i=0;i<n;i++)
-                            g->scale_factors[j++] = get_bits(&s->gb, slen1);
-                    }else{
-                        for(i=0;i<n;i++)
-                            g->scale_factors[j++] = 0;
-                    }
-                    if(slen2){
-                        for(i=0;i<18;i++)
-                            g->scale_factors[j++] = get_bits(&s->gb, slen2);
-                        for(i=0;i<3;i++)
-                            g->scale_factors[j++] = 0;
-                    }else{
-                        for(i=0;i<21;i++)
-                            g->scale_factors[j++] = 0;
-                    }
-                } else {
-                    sc = granules[ch][0].scale_factors;
-                    j = 0;
-                    for(k=0;k<4;k++) {
-                        n = (k == 0 ? 6 : 5);
-                        if ((g->scfsi & (0x8 >> k)) == 0) {
-                            slen = (k < 2) ? slen1 : slen2;
-                            if(slen){
-                                for(i=0;i<n;i++)
-                                    g->scale_factors[j++] = get_bits(&s->gb, slen);
-                            }else{
-                                for(i=0;i<n;i++)
-                                    g->scale_factors[j++] = 0;
-                            }
-                        } else {
-                            /* simply copy from last granule */
-                            for(i=0;i<n;i++) {
-                                g->scale_factors[j] = sc[j];
-                                j++;
-                            }
-                        }
-                    }
-                    g->scale_factors[j++] = 0;
-                }
-#if defined(DEBUG)
-                {
-                    dprintf(s->avctx, "scfsi=%x gr=%d ch=%d scale_factors:\n",
-                           g->scfsi, gr, ch);
-                    for(i=0;i<j;i++)
-                        dprintf(s->avctx, " %d", g->scale_factors[i]);
-                    dprintf(s->avctx, "\n");
-                }
-#endif
-            } else {
-                int tindex, tindex2, slen[4], sl, sf;
-
-                /* LSF scale factors */
-                if (g->block_type == 2) {
-                    tindex = g->switch_point ? 2 : 1;
-                } else {
-                    tindex = 0;
-                }
-                sf = g->scalefac_compress;
-                if ((s->mode_ext & MODE_EXT_I_STEREO) && ch == 1) {
-                    /* intensity stereo case */
-                    sf >>= 1;
-                    if (sf < 180) {
-                        lsf_sf_expand(slen, sf, 6, 6, 0);
-                        tindex2 = 3;
-                    } else if (sf < 244) {
-                        lsf_sf_expand(slen, sf - 180, 4, 4, 0);
-                        tindex2 = 4;
-                    } else {
-                        lsf_sf_expand(slen, sf - 244, 3, 0, 0);
-                        tindex2 = 5;
-                    }
-                } else {
-                    /* normal case */
-                    if (sf < 400) {
-                        lsf_sf_expand(slen, sf, 5, 4, 4);
-                        tindex2 = 0;
-                    } else if (sf < 500) {
-                        lsf_sf_expand(slen, sf - 400, 5, 4, 0);
-                        tindex2 = 1;
-                    } else {
-                        lsf_sf_expand(slen, sf - 500, 3, 0, 0);
-                        tindex2 = 2;
-                        g->preflag = 1;
-                    }
-                }
-
-                j = 0;
-                for(k=0;k<4;k++) {
-                    n = lsf_nsf_table[tindex2][tindex][k];
-                    sl = slen[k];
-                    if(sl){
-                        for(i=0;i<n;i++)
-                            g->scale_factors[j++] = get_bits(&s->gb, sl);
-                    }else{
-                        for(i=0;i<n;i++)
-                            g->scale_factors[j++] = 0;
-                    }
-                }
-                /* XXX: should compute exact size */
-                for(;j<40;j++)
-                    g->scale_factors[j] = 0;
-#if defined(DEBUG)
-                {
-                    dprintf(s->avctx, "gr=%d ch=%d scale_factors:\n",
-                           gr, ch);
-                    for(i=0;i<40;i++)
-                        dprintf(s->avctx, " %d", g->scale_factors[i]);
-                    dprintf(s->avctx, "\n");
-                }
-#endif
-            }
-
-            exponents_from_scale_factors(s, g, exponents);
-
-            /* read Huffman coded residue */
-            huffman_decode(s, g, exponents, bits_pos + g->part2_3_length);
-#if defined(DEBUG)
-            sample_dump(0, g->sb_hybrid, 576);
-#endif
-        } /* ch */
-
-        if (s->nb_channels == 2)
-            compute_stereo(s, &granules[0][gr], &granules[1][gr]);
-
-        for(ch=0;ch<s->nb_channels;ch++) {
-            g = &granules[ch][gr];
-
-            reorder_block(s, g);
-#if defined(DEBUG)
-            sample_dump(0, g->sb_hybrid, 576);
-#endif
-            s->compute_antialias(s, g);
-#if defined(DEBUG)
-            sample_dump(1, g->sb_hybrid, 576);
-#endif
-            compute_imdct(s, g, &s->sb_samples[ch][18 * gr][0], s->mdct_buf[ch]);
-#if defined(DEBUG)
-            sample_dump(2, &s->sb_samples[ch][18 * gr][0], 576);
-#endif
-        }
-    } /* gr */
-    if(get_bits_count(&s->gb)<0)
-        skip_bits_long(&s->gb, -get_bits_count(&s->gb));
-    return nb_granules * 18;
-}
-
-static int mp_decode_frame(MPADecodeContext *s,
-                           OUT_INT *samples, const uint8_t *buf, int buf_size)
-{
-    int i, nb_frames, ch;
-    OUT_INT *samples_ptr;
-
-    init_get_bits(&s->gb, buf + HEADER_SIZE, (buf_size - HEADER_SIZE)*8);
-
-    /* skip error protection field */
-    if (s->error_protection)
-        get_bits(&s->gb, 16);
-
-    dprintf(s->avctx, "frame %d:\n", s->frame_count);
-    switch(s->layer) {
-    case 1:
-        nb_frames = mp_decode_layer1(s);
-        break;
-    case 2:
-        nb_frames = mp_decode_layer2(s);
-        break;
-    case 3:
-    default:
-        nb_frames = mp_decode_layer3(s);
-
-        s->last_buf_size=0;
-        if(s->in_gb.buffer){
-            align_get_bits(&s->gb);
-            i= (s->gb.size_in_bits - get_bits_count(&s->gb))>>3;
-            if(i >= 0 && i <= BACKSTEP_SIZE){
-                memmove(s->last_buf, s->gb.buffer + (get_bits_count(&s->gb)>>3), i);
-                s->last_buf_size=i;
-            }else
-                av_log(NULL, AV_LOG_ERROR, "invalid old backstep %d\n", i);
-            s->gb= s->in_gb;
-            s->in_gb.buffer= NULL;
-        }
-
-        align_get_bits(&s->gb);
-        assert((get_bits_count(&s->gb) & 7) == 0);
-        i= (s->gb.size_in_bits - get_bits_count(&s->gb))>>3;
-
-        if(i<0 || i > BACKSTEP_SIZE || nb_frames<0){
-            av_log(NULL, AV_LOG_ERROR, "invalid new backstep %d\n", i);
-            i= FFMIN(BACKSTEP_SIZE, buf_size - HEADER_SIZE);
-        }
-        assert(i <= buf_size - HEADER_SIZE && i>= 0);
-        memcpy(s->last_buf + s->last_buf_size, s->gb.buffer + buf_size - HEADER_SIZE - i, i);
-        s->last_buf_size += i;
-
-        break;
-    }
-#if defined(DEBUG)
-    for(i=0;i<nb_frames;i++) {
-        for(ch=0;ch<s->nb_channels;ch++) {
-            int j;
-            dprintf(s->avctx, "%d-%d:", i, ch);
-            for(j=0;j<SBLIMIT;j++)
-                dprintf(s->avctx, " %0.6f", (double)s->sb_samples[ch][i][j] / FRAC_ONE);
-            dprintf(s->avctx, "\n");
-        }
-    }
-#endif
-    /* apply the synthesis filter */
-    for(ch=0;ch<s->nb_channels;ch++) {
-        samples_ptr = samples + ch;
-        for(i=0;i<nb_frames;i++) {
-            ff_mpa_synth_filter(s->synth_buf[ch], &(s->synth_buf_offset[ch]),
-                         window, &s->dither_state,
-                         samples_ptr, s->nb_channels,
-                         s->sb_samples[ch][i]);
-            samples_ptr += 32 * s->nb_channels;
-        }
-    }
-#ifdef DEBUG
-    s->frame_count++;
-#endif
-    return nb_frames * 32 * sizeof(OUT_INT) * s->nb_channels;
-}
-
-static int decode_frame(AVCodecContext * avctx,
-                        void *data, int *data_size,
-                        uint8_t * buf, int buf_size)
-{
-    MPADecodeContext *s = avctx->priv_data;
-    uint32_t header;
-    int out_size;
-    OUT_INT *out_samples = data;
-
-retry:
-    if(buf_size < HEADER_SIZE)
-        return -1;
-
-    header = (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
-    if(ff_mpa_check_header(header) < 0){
-        buf++;
-//        buf_size--;
-        av_log(avctx, AV_LOG_ERROR, "Header missing skipping one byte.\n");
-        goto retry;
-    }
-
-    if (ff_mpegaudio_decode_header(s, header) == 1) {
-        /* free format: prepare to compute frame size */
-        s->frame_size = -1;
-        return -1;
-    }
-    /* update codec info */
-    avctx->channels = s->nb_channels;
-    avctx->bit_rate = s->bit_rate;
-    avctx->sub_id = s->layer;
-    switch(s->layer) {
-    case 1:
-        avctx->frame_size = 384;
-        break;
-    case 2:
-        avctx->frame_size = 1152;
-        break;
-    case 3:
-        if (s->lsf)
-            avctx->frame_size = 576;
-        else
-            avctx->frame_size = 1152;
-        break;
-    }
-
-    if(s->frame_size<=0 || s->frame_size > buf_size){
-        av_log(avctx, AV_LOG_ERROR, "incomplete frame\n");
-        return -1;
-    }else if(s->frame_size < buf_size){
-        av_log(avctx, AV_LOG_ERROR, "incorrect frame size\n");
-    }
-
-    out_size = mp_decode_frame(s, out_samples, buf, buf_size);
-    if(out_size>=0){
-        *data_size = out_size;
-        avctx->sample_rate = s->sample_rate;
-        //FIXME maybe move the other codec info stuff from above here too
-    }else
-        av_log(avctx, AV_LOG_DEBUG, "Error while decoding MPEG audio frame.\n"); //FIXME return -1 / but also return the number of bytes consumed
-    s->frame_size = 0;
-    return buf_size;
-}
-
-static void flush(AVCodecContext *avctx){
-    MPADecodeContext *s = avctx->priv_data;
-    s->last_buf_size= 0;
-}
-
-#ifdef CONFIG_MP3ADU_DECODER
-static int decode_frame_adu(AVCodecContext * avctx,
-                        void *data, int *data_size,
-                        uint8_t * buf, int buf_size)
-{
-    MPADecodeContext *s = avctx->priv_data;
-    uint32_t header;
-    int len, out_size;
-    OUT_INT *out_samples = data;
-
-    len = buf_size;
-
-    // Discard too short frames
-    if (buf_size < HEADER_SIZE) {
-        *data_size = 0;
-        return buf_size;
-    }
-
-
-    if (len > MPA_MAX_CODED_FRAME_SIZE)
-        len = MPA_MAX_CODED_FRAME_SIZE;
-
-    // Get header and restore sync word
-    header = (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3] | 0xffe00000;
-
-    if (ff_mpa_check_header(header) < 0) { // Bad header, discard frame
-        *data_size = 0;
-        return buf_size;
-    }
-
-    ff_mpegaudio_decode_header(s, header);
-    /* update codec info */
-    avctx->sample_rate = s->sample_rate;
-    avctx->channels = s->nb_channels;
-    avctx->bit_rate = s->bit_rate;
-    avctx->sub_id = s->layer;
-
-    avctx->frame_size=s->frame_size = len;
-
-    if (avctx->parse_only) {
-        out_size = buf_size;
-    } else {
-        out_size = mp_decode_frame(s, out_samples, buf, buf_size);
-    }
-
-    *data_size = out_size;
-    return buf_size;
-}
-#endif /* CONFIG_MP3ADU_DECODER */
-
-#ifdef CONFIG_MP3ON4_DECODER
-/* Next 3 arrays are indexed by channel config number (passed via codecdata) */
-static int mp3Frames[16] = {0,1,1,2,3,3,4,5,2};   /* number of mp3 decoder instances */
-static int mp3Channels[16] = {0,1,2,3,4,5,6,8,4}; /* total output channels */
-/* offsets into output buffer, assume output order is FL FR BL BR C LFE */
-static int chan_offset[9][5] = {
-    {0},
-    {0},            // C
-    {0},            // FLR
-    {2,0},          // C FLR
-    {2,0,3},        // C FLR BS
-    {4,0,2},        // C FLR BLRS
-    {4,0,2,5},      // C FLR BLRS LFE
-    {4,0,2,6,5},    // C FLR BLRS BLR LFE
-    {0,2}           // FLR BLRS
-};
-
-
-static int decode_init_mp3on4(AVCodecContext * avctx)
-{
-    MP3On4DecodeContext *s = avctx->priv_data;
-    int i;
-
-    if ((avctx->extradata_size < 2) || (avctx->extradata == NULL)) {
-        av_log(avctx, AV_LOG_ERROR, "Codec extradata missing or too short.\n");
-        return -1;
-    }
-
-    s->chan_cfg = (((unsigned char *)avctx->extradata)[1] >> 3) & 0x0f;
-    s->frames = mp3Frames[s->chan_cfg];
-    if(!s->frames) {
-        av_log(avctx, AV_LOG_ERROR, "Invalid channel config number.\n");
-        return -1;
-    }
-    avctx->channels = mp3Channels[s->chan_cfg];
-
-    /* Init the first mp3 decoder in standard way, so that all tables get builded
-     * We replace avctx->priv_data with the context of the first decoder so that
-     * decode_init() does not have to be changed.
-     * Other decoders will be inited here copying data from the first context
-     */
-    // Allocate zeroed memory for the first decoder context
-    s->mp3decctx[0] = av_mallocz(sizeof(MPADecodeContext));
-    // Put decoder context in place to make init_decode() happy
-    avctx->priv_data = s->mp3decctx[0];
-    decode_init(avctx);
-    // Restore mp3on4 context pointer
-    avctx->priv_data = s;
-    s->mp3decctx[0]->adu_mode = 1; // Set adu mode
-
-    /* Create a separate codec/context for each frame (first is already ok).
-     * Each frame is 1 or 2 channels - up to 5 frames allowed
-     */
-    for (i = 1; i < s->frames; i++) {
-        s->mp3decctx[i] = av_mallocz(sizeof(MPADecodeContext));
-        s->mp3decctx[i]->compute_antialias = s->mp3decctx[0]->compute_antialias;
-        s->mp3decctx[i]->adu_mode = 1;
-        s->mp3decctx[i]->avctx = avctx;
-    }
-
-    return 0;
-}
-
-
-static int decode_close_mp3on4(AVCodecContext * avctx)
-{
-    MP3On4DecodeContext *s = avctx->priv_data;
-    int i;
-
-    for (i = 0; i < s->frames; i++)
-        if (s->mp3decctx[i])
-            av_free(s->mp3decctx[i]);
-
-    return 0;
-}
-
-
-static int decode_frame_mp3on4(AVCodecContext * avctx,
-                        void *data, int *data_size,
-                        uint8_t * buf, int buf_size)
-{
-    MP3On4DecodeContext *s = avctx->priv_data;
-    MPADecodeContext *m;
-    int len, out_size = 0;
-    uint32_t header;
-    OUT_INT *out_samples = data;
-    OUT_INT decoded_buf[MPA_FRAME_SIZE * MPA_MAX_CHANNELS];
-    OUT_INT *outptr, *bp;
-    int fsize;
-    unsigned char *start2 = buf, *start;
-    int fr, i, j, n;
-    int off = avctx->channels;
-    int *coff = chan_offset[s->chan_cfg];
-
-    len = buf_size;
-
-    // Discard too short frames
-    if (buf_size < HEADER_SIZE) {
-        *data_size = 0;
-        return buf_size;
-    }
-
-    // If only one decoder interleave is not needed
-    outptr = s->frames == 1 ? out_samples : decoded_buf;
-
-    for (fr = 0; fr < s->frames; fr++) {
-        start = start2;
-        fsize = (start[0] << 4) | (start[1] >> 4);
-        start2 += fsize;
-        if (fsize > len)
-            fsize = len;
-        len -= fsize;
-        if (fsize > MPA_MAX_CODED_FRAME_SIZE)
-            fsize = MPA_MAX_CODED_FRAME_SIZE;
-        m = s->mp3decctx[fr];
-        assert (m != NULL);
-
-        // Get header
-        header = (start[0] << 24) | (start[1] << 16) | (start[2] << 8) | start[3] | 0xfff00000;
-
-        if (ff_mpa_check_header(header) < 0) { // Bad header, discard block
-            *data_size = 0;
-            return buf_size;
-        }
-
-        ff_mpegaudio_decode_header(m, header);
-        mp_decode_frame(m, decoded_buf, start, fsize);
-
-        n = MPA_FRAME_SIZE * m->nb_channels;
-        out_size += n * sizeof(OUT_INT);
-        if(s->frames > 1) {
-            /* interleave output data */
-            bp = out_samples + coff[fr];
-            if(m->nb_channels == 1) {
-                for(j = 0; j < n; j++) {
-                    *bp = decoded_buf[j];
-                    bp += off;
-                }
-            } else {
-                for(j = 0; j < n; j++) {
-                    bp[0] = decoded_buf[j++];
-                    bp[1] = decoded_buf[j];
-                    bp += off;
-                }
-            }
-        }
-    }
-
-    /* update codec info */
-    avctx->sample_rate = s->mp3decctx[0]->sample_rate;
-    avctx->frame_size= buf_size;
-    avctx->bit_rate = 0;
-    for (i = 0; i < s->frames; i++)
-        avctx->bit_rate += s->mp3decctx[i]->bit_rate;
-
-    *data_size = out_size;
-    return buf_size;
-}
-#endif /* CONFIG_MP3ON4_DECODER */
-
-#ifdef CONFIG_MP2_DECODER
-AVCodec mp2_decoder =
-{
-    "mp2",
-    CODEC_TYPE_AUDIO,
-    CODEC_ID_MP2,
-    sizeof(MPADecodeContext),
-    decode_init,
-    NULL,
-    NULL,
-    decode_frame,
-    CODEC_CAP_PARSE_ONLY,
-};
-#endif
-#ifdef CONFIG_MP3_DECODER
-AVCodec mp3_decoder =
-{
-    "mp3",
-    CODEC_TYPE_AUDIO,
-    CODEC_ID_MP3,
-    sizeof(MPADecodeContext),
-    decode_init,
-    NULL,
-    NULL,
-    decode_frame,
-    CODEC_CAP_PARSE_ONLY,
-    .flush= flush,
-};
-#endif
-#ifdef CONFIG_MP3ADU_DECODER
-AVCodec mp3adu_decoder =
-{
-    "mp3adu",
-    CODEC_TYPE_AUDIO,
-    CODEC_ID_MP3ADU,
-    sizeof(MPADecodeContext),
-    decode_init,
-    NULL,
-    NULL,
-    decode_frame_adu,
-    CODEC_CAP_PARSE_ONLY,
-    .flush= flush,
-};
-#endif
-#ifdef CONFIG_MP3ON4_DECODER
-AVCodec mp3on4_decoder =
-{
-    "mp3on4",
-    CODEC_TYPE_AUDIO,
-    CODEC_ID_MP3ON4,
-    sizeof(MP3On4DecodeContext),
-    decode_init_mp3on4,
-    NULL,
-    decode_close_mp3on4,
-    decode_frame_mp3on4,
-    .flush= flush,
-};
-#endif

Modified: trunk/libavcodec/mpegaudio.h
==============================================================================
--- trunk/libavcodec/mpegaudio.h	(original)
+++ trunk/libavcodec/mpegaudio.h	Mon May 21 00:50:29 2007
@@ -26,6 +26,7 @@
 #ifndef MPEGAUDIO_H
 #define MPEGAUDIO_H
 
+#include "avcodec.h"
 #include "bitstream.h"
 #include "dsputil.h"
 
@@ -115,7 +116,7 @@ typedef struct MPADecodeContext {
     AVCodecContext* avctx;
 } MPADecodeContext;
 
-int l2_select_table(int bitrate, int nb_channels, int freq, int lsf);
+int ff_mpa_l2_select_table(int bitrate, int nb_channels, int freq, int lsf);
 int ff_mpa_decode_header(AVCodecContext *avctx, uint32_t head, int *sample_rate);
 void ff_mpa_synth_init(MPA_INT *window);
 void ff_mpa_synth_filter(MPA_INT *synth_buf_ptr, int *synth_buf_offset,

Modified: trunk/libavcodec/mpegaudiodec.c
==============================================================================
--- trunk/libavcodec/mpegaudiodec.c	(original)
+++ trunk/libavcodec/mpegaudiodec.c	Mon May 21 00:50:29 2007
@@ -1140,28 +1140,6 @@ static int mp_decode_layer1(MPADecodeCon
     return 12;
 }
 
-/* bitrate is in kb/s */
-int l2_select_table(int bitrate, int nb_channels, int freq, int lsf)
-{
-    int ch_bitrate, table;
-
-    ch_bitrate = bitrate / nb_channels;
-    if (!lsf) {
-        if ((freq == 48000 && ch_bitrate >= 56) ||
-            (ch_bitrate >= 56 && ch_bitrate <= 80))
-            table = 0;
-        else if (freq != 48000 && ch_bitrate >= 96)
-            table = 1;
-        else if (freq != 32000 && ch_bitrate <= 48)
-            table = 2;
-        else
-            table = 3;
-    } else {
-        table = 4;
-    }
-    return table;
-}
-
 static int mp_decode_layer2(MPADecodeContext *s)
 {
     int sblimit; /* number of used subbands */
@@ -1173,7 +1151,7 @@ static int mp_decode_layer2(MPADecodeCon
     int scale, qindex, bits, steps, k, l, m, b;
 
     /* select decoding table */
-    table = l2_select_table(s->bit_rate / 1000, s->nb_channels,
+    table = ff_mpa_l2_select_table(s->bit_rate / 1000, s->nb_channels,
                             s->sample_rate, s->lsf);
     sblimit = ff_mpa_sblimit_table[table];
     alloc_table = ff_mpa_alloc_tables[table];

Copied: trunk/libavcodec/mpegaudioenc.c (from r9081, /trunk/libavcodec/mpegaudio.c)
==============================================================================
--- /trunk/libavcodec/mpegaudio.c	(original)
+++ trunk/libavcodec/mpegaudioenc.c	Mon May 21 00:50:29 2007
@@ -118,7 +118,7 @@ static int MPA_encode_init(AVCodecContex
     s->frame_frac_incr = (int)((a - floor(a)) * 65536.0);
 
     /* select the right allocation table */
-    table = l2_select_table(bitrate, s->nb_channels, freq, s->lsf);
+    table = ff_mpa_l2_select_table(bitrate, s->nb_channels, freq, s->lsf);
 
     /* number of used subbands */
     s->sblimit = ff_mpa_sblimit_table[table];




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