Add HE-AAC v2 support to the AAC decoder.

Originally committed as revision 23647 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 1124 insertions, 0 deletions

diff --git a/libavcodec/ps.c b/libavcodec/ps.c
new file mode 100644
index 0000000000..1f2922639d
--- /dev/null
+++ b/libavcodec/ps.c
@@ -0,0 +1,1124 @@
+/*
+ * MPEG-4 Parametric Stereo decoding functions
+ * Copyright (c) 2010 Alex Converse <alex.converse@gmail.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stdint.h>
+#include "libavutil/mathematics.h"
+#include "avcodec.h"
+#include "get_bits.h"
+#include "ps.h"
+#include "ps_tablegen.h"
+#include "psdata.c"
+
+#define PS_BASELINE 0
+
+#define numQMFSlots 32 //numTimeSlots * RATE
+
+static const int8_t num_env_tab[2][4] = {
+    { 0, 1, 2, 4, },
+    { 1, 2, 3, 4, },
+};
+
+static const int8_t nr_iidicc_par_tab[] = {
+    10, 20, 34, 10, 20, 34,
+};
+
+static const int8_t nr_iidopd_par_tab[] = {
+     5, 11, 17,  5, 11, 17,
+};
+
+enum {
+    huff_iid_df1,
+    huff_iid_dt1,
+    huff_iid_df0,
+    huff_iid_dt0,
+    huff_icc_df,
+    huff_icc_dt,
+    huff_ipd_df,
+    huff_ipd_dt,
+    huff_opd_df,
+    huff_opd_dt,
+};
+
+static const int huff_iid[] = {
+    huff_iid_df0,
+    huff_iid_df1,
+    huff_iid_dt0,
+    huff_iid_dt1,
+};
+
+static VLC vlc_ps[10];
+
+/**
+ * Read Inter-channel Intensity Difference parameters from the bitstream.
+ *
+ * @param avctx contains the current codec context
+ * @param gb    pointer to the input bitstream
+ * @param ps    pointer to the Parametric Stereo context
+ * @param e     envelope to decode
+ * @param dt    1: time delta-coded, 0: frequency delta-coded
+ */
+static int iid_data(AVCodecContext *avctx, GetBitContext *gb, PSContext *ps, int e, int dt)
+{
+    int b;
+    int table_idx = huff_iid[2*dt+ps->iid_quant];
+    VLC_TYPE (*vlc_table)[2] = vlc_ps[table_idx].table;
+    if (dt) {
+        int e_prev = e ? e - 1 : ps->num_env_old - 1;
+        e_prev = FFMAX(e_prev, 0);
+        for (b = 0; b < ps->nr_iid_par; b++) {
+            ps->iid_par[e][b] = ps->iid_par[e_prev][b] +
+                                get_vlc2(gb, vlc_table, 9, 3) -
+                                huff_offset[table_idx];
+            if (FFABS(ps->iid_par[e][b]) > 7 + 8 * ps->iid_quant)
+                goto err;
+        }
+    } else {
+        int prev = 0;
+        for (b = 0; b < ps->nr_iid_par; b++) {
+            prev += get_vlc2(gb, vlc_table, 9, 3) -
+                    huff_offset[table_idx];
+            ps->iid_par[e][b] = prev;
+            if (FFABS(ps->iid_par[e][b]) > 7 + 8 * ps->iid_quant)
+                goto err;
+        }
+    }
+    return 0;
+err:
+    av_log(avctx, AV_LOG_ERROR, "illegal iid\n");
+    return -1;
+}
+
+/**
+ * Read Inter-Channel Coherence parameters from the bitstream.
+ *
+ * @param avctx contains the current codec context
+ * @param gb    pointer to the input bitstream
+ * @param ps    pointer to the Parametric Stereo context
+ * @param e     envelope to decode
+ * @param dt    1: time delta-coded, 0: frequency delta-coded
+ */
+static int icc_data(AVCodecContext *avctx, GetBitContext *gb, PSContext *ps, int e, int dt)
+{
+    int b;
+    int table_idx = dt ? huff_icc_dt : huff_icc_df;
+    VLC_TYPE (*vlc_table)[2] = vlc_ps[table_idx].table;
+    if (dt) {
+        int e_prev = e ? e - 1 : ps->num_env_old - 1;
+        e_prev = FFMAX(e_prev, 0);
+        for (b = 0; b < ps->nr_icc_par; b++) {
+            ps->icc_par[e][b] = ps->icc_par[e_prev][b] + get_vlc2(gb, vlc_table, 9, 3) - huff_offset[table_idx];
+            if (ps->icc_par[e][b] > 7U)
+                goto err;
+        }
+    } else {
+        int prev = 0;
+        for (b = 0; b < ps->nr_icc_par; b++) {
+            prev += get_vlc2(gb, vlc_table, 9, 3) - huff_offset[table_idx];
+            ps->icc_par[e][b] = prev;
+            if (ps->icc_par[e][b] > 7U)
+                goto err;
+        }
+    }
+    return 0;
+err:
+    av_log(avctx, AV_LOG_ERROR, "illegal icc\n");
+    return -1;
+}
+
+/**
+ * Read Inter-channel Phase Difference parameters from the bitstream.
+ *
+ * @param gb    pointer to the input bitstream
+ * @param ps    pointer to the Parametric Stereo context
+ * @param e     envelope to decode
+ * @param dt    1: time delta-coded, 0: frequency delta-coded
+ */
+static void ipd_data(GetBitContext *gb, PSContext *ps, int e, int dt)
+{
+    int b;
+    int table_idx = dt ? huff_ipd_dt : huff_ipd_df;
+    VLC_TYPE (*vlc_table)[2] = vlc_ps[table_idx].table;
+    if (dt) {
+        int e_prev = e ? e - 1 : ps->num_env_old - 1;
+        e_prev = FFMAX(e_prev, 0);
+        for (b = 0; b < ps->nr_ipdopd_par; b++) {
+            ps->ipd_par[e][b] = (ps->ipd_par[e_prev][b] + get_vlc2(gb, vlc_table, 9, 1)) & 0x07;
+        }
+    } else {
+        int prev = 0;
+        for (b = 0; b < ps->nr_ipdopd_par; b++) {
+            prev += get_vlc2(gb, vlc_table, 9, 3);
+            prev &= 0x07;
+            ps->ipd_par[e][b] = prev;
+        }
+    }
+}
+
+/**
+ * Read Overall Phase Difference parameters from the bitstream.
+ *
+ * @param gb    pointer to the input bitstream
+ * @param ps    pointer to the Parametric Stereo context
+ * @param e     envelope to decode
+ * @param dt    1: time delta-coded, 0: frequency delta-coded
+ */
+static void opd_data(GetBitContext *gb, PSContext *ps, int e, int dt)
+{
+    int b;
+    int table_idx = dt ? huff_opd_dt : huff_opd_df;
+    VLC_TYPE (*vlc_table)[2] = vlc_ps[table_idx].table;
+    if (dt) {
+        int e_prev = e ? e - 1 : ps->num_env_old - 1;
+        e_prev = FFMAX(e_prev, 0);
+        for (b = 0; b < ps->nr_ipdopd_par; b++) {
+            ps->opd_par[e][b] = (ps->opd_par[e_prev][b] + get_vlc2(gb, vlc_table, 9, 1)) & 0x07;
+        }
+    } else {
+        int prev = 0;
+        for (b = 0; b < ps->nr_ipdopd_par; b++) {
+            prev += get_vlc2(gb, vlc_table, 9, 3);
+            prev &= 0x07;
+            ps->opd_par[e][b] = prev;
+        }
+    }
+}
+
+static int ps_extension(GetBitContext *gb, PSContext *ps, int ps_extension_id)
+{
+    int e;
+    int count = get_bits_count(gb);
+
+    if (ps_extension_id)
+        return 0;
+
+    ps->enable_ipdopd = get_bits1(gb);
+    if (ps->enable_ipdopd) {
+        for (e = 0; e < ps->num_env; e++) {
+            int dt = get_bits1(gb);
+            ipd_data(gb, ps, e, dt);
+            dt = get_bits1(gb);
+            opd_data(gb, ps, e, dt);
+        }
+    }
+    skip_bits1(gb);      //reserved_ps
+    return get_bits_count(gb) - count;
+}
+
+static void ipdopd_reset(int8_t *opd_hist, int8_t *ipd_hist)
+{
+    int i;
+    for (i = 0; i < PS_MAX_NR_IPDOPD; i++) {
+        opd_hist[i] = 0;
+        ipd_hist[i] = 0;
+    }
+}
+
+int ff_ps_read_data(AVCodecContext *avctx, GetBitContext *gb_host, PSContext *ps, int bits_left)
+{
+    int e;
+    int bit_count_start = get_bits_count(gb_host);
+    int header;
+    int bits_consumed;
+    GetBitContext gbc = *gb_host, *gb = &gbc;
+
+    header = get_bits1(gb);
+    if (header) {     //enable_ps_header
+        ps->enable_iid = get_bits1(gb);
+        if (ps->enable_iid) {
+            ps->iid_mode = get_bits(gb, 3);
+            if (ps->iid_mode > 5) {
+                av_log(avctx, AV_LOG_ERROR, "iid_mode %d is reserved.\n",
+                       ps->iid_mode);
+                goto err;
+            }
+            ps->nr_iid_par    = nr_iidicc_par_tab[ps->iid_mode];
+            ps->iid_quant     = ps->iid_mode > 2;
+            ps->nr_ipdopd_par = nr_iidopd_par_tab[ps->iid_mode];
+        }
+        ps->enable_icc = get_bits1(gb);
+        if (ps->enable_icc) {
+            ps->icc_mode = get_bits(gb, 3);
+            if (ps->icc_mode > 5) {
+                av_log(avctx, AV_LOG_ERROR, "icc_mode %d is reserved.\n",
+                       ps->icc_mode);
+                goto err;
+            }
+            ps->nr_icc_par = nr_iidicc_par_tab[ps->icc_mode];
+        }
+        ps->enable_ext = get_bits1(gb);
+    }
+
+    ps->frame_class = get_bits1(gb);
+    ps->num_env_old = ps->num_env;
+    ps->num_env     = num_env_tab[ps->frame_class][get_bits(gb, 2)];
+
+    ps->border_position[0] = -1;
+    if (ps->frame_class) {
+        for (e = 1; e <= ps->num_env; e++)
+            ps->border_position[e] = get_bits(gb, 5);
+    } else
+        for (e = 1; e <= ps->num_env; e++)
+            ps->border_position[e] = e * numQMFSlots / ps->num_env - 1;
+
+    if (ps->enable_iid) {
+        for (e = 0; e < ps->num_env; e++) {
+            int dt = get_bits1(gb);
+            if (iid_data(avctx, gb, ps, e, dt))
+                goto err;
+        }
+    } else
+        memset(ps->iid_par, 0, sizeof(ps->iid_par));
+
+    if (ps->enable_icc)
+        for (e = 0; e < ps->num_env; e++) {
+            int dt = get_bits1(gb);
+            if (icc_data(avctx, gb, ps, e, dt))
+                goto err;
+        }
+    else
+        memset(ps->icc_par, 0, sizeof(ps->icc_par));
+
+    if (ps->enable_ext) {
+        int cnt = get_bits(gb, 4);
+        if (cnt == 15) {
+            cnt += get_bits(gb, 8);
+        }
+        cnt *= 8;
+        while (cnt > 7) {
+            int ps_extension_id = get_bits(gb, 2);
+            cnt -= 2 + ps_extension(gb, ps, ps_extension_id);
+        }
+        if (cnt < 0) {
+            av_log(avctx, AV_LOG_ERROR, "ps extension overflow %d", cnt);
+            goto err;
+        }
+        skip_bits(gb, cnt);
+    }
+
+    ps->enable_ipdopd &= !PS_BASELINE;
+
+    //Fix up envelopes
+    if (!ps->num_env || ps->border_position[ps->num_env] < numQMFSlots - 1) {
+        //Create a fake envelope
+        int source = ps->num_env ? ps->num_env - 1 : ps->num_env_old - 1;
+        if (source >= 0 && source != ps->num_env) {
+            if (ps->enable_iid && ps->num_env_old > 1) {
+                memcpy(ps->iid_par+ps->num_env, ps->iid_par+source, sizeof(ps->iid_par[0]));
+            }
+            if (ps->enable_icc && ps->num_env_old > 1) {
+                memcpy(ps->icc_par+ps->num_env, ps->icc_par+source, sizeof(ps->icc_par[0]));
+            }
+            if (ps->enable_ipdopd && ps->num_env_old > 1) {
+                memcpy(ps->ipd_par+ps->num_env, ps->ipd_par+source, sizeof(ps->ipd_par[0]));
+                memcpy(ps->opd_par+ps->num_env, ps->opd_par+source, sizeof(ps->opd_par[0]));
+            }
+        }
+        ps->num_env++;
+        ps->border_position[ps->num_env] = numQMFSlots - 1;
+    }
+
+
+    ps->is34bands_old = ps->is34bands;
+    if (!PS_BASELINE && (ps->enable_iid || ps->enable_icc))
+        ps->is34bands = (ps->enable_iid && ps->nr_iid_par == 34) ||
+                        (ps->enable_icc && ps->nr_icc_par == 34);
+
+    //Baseline
+    if (!ps->enable_ipdopd) {
+        memset(ps->ipd_par, 0, sizeof(ps->ipd_par));
+        memset(ps->opd_par, 0, sizeof(ps->opd_par));
+    }
+
+    if (header)
+        ps->start = 1;
+
+    bits_consumed = get_bits_count(gb) - bit_count_start;
+    if (bits_consumed <= bits_left) {
+        skip_bits_long(gb_host, bits_consumed);
+        return bits_consumed;
+    }
+    av_log(avctx, AV_LOG_ERROR, "Expected to read %d PS bits actually read %d.\n", bits_left, bits_consumed);
+err:
+    ps->start = 0;
+    skip_bits_long(gb_host, bits_left);
+    return bits_left;
+}
+
+/** Split one subband into 2 subsubbands with a symmetric real filter.
+ * The filter must have its non-center even coefficients equal to zero. */
+static void hybrid2_re(float (*in)[2], float (*out)[32][2], const float filter[7], int len, int reverse)
+{
+    int i, j;
+    for (i = 0; i < len; i++) {
+        float re_in = filter[6] * in[6+i][0];        //real inphase
+        float re_op = 0.0f;                          //real out of phase
+        float im_in = filter[6] * in[6+i][1];        //imag inphase
+        float im_op = 0.0f;                          //imag out of phase
+        for (j = 0; j < 6; j += 2) {
+            re_op += filter[j+1] * (in[i+j+1][0] + in[12-j-1+i][0]);
+            im_op += filter[j+1] * (in[i+j+1][1] + in[12-j-1+i][1]);
+        }
+        out[ reverse][i][0] = re_in + re_op;
+        out[ reverse][i][1] = im_in + im_op;
+        out[!reverse][i][0] = re_in - re_op;
+        out[!reverse][i][1] = im_in - im_op;
+    }
+}
+
+/** Split one subband into 6 subsubbands with a complex filter */
+static void hybrid6_cx(float (*in)[2], float (*out)[32][2], const float (*filter)[7][2], int len)
+{
+    int i, j, ssb;
+    int N = 8;
+    float temp[8][2];
+
+    for (i = 0; i < len; i++) {
+        for (ssb = 0; ssb < N; ssb++) {
+            float sum_re = filter[ssb][6][0] * in[i+6][0], sum_im = filter[ssb][6][0] * in[i+6][1];
+            for (j = 0; j < 6; j++) {
+                float in0_re = in[i+j][0];
+                float in0_im = in[i+j][1];
+                float in1_re = in[i+12-j][0];
+                float in1_im = in[i+12-j][1];
+                sum_re += filter[ssb][j][0] * (in0_re + in1_re) - filter[ssb][j][1] * (in0_im - in1_im);
+                sum_im += filter[ssb][j][0] * (in0_im + in1_im) + filter[ssb][j][1] * (in0_re - in1_re);
+            }
+            temp[ssb][0] = sum_re;
+            temp[ssb][1] = sum_im;
+        }
+        out[0][i][0] = temp[6][0];
+        out[0][i][1] = temp[6][1];
+        out[1][i][0] = temp[7][0];
+        out[1][i][1] = temp[7][1];
+        out[2][i][0] = temp[0][0];
+        out[2][i][1] = temp[0][1];
+        out[3][i][0] = temp[1][0];
+        out[3][i][1] = temp[1][1];
+        out[4][i][0] = temp[2][0] + temp[5][0];
+        out[4][i][1] = temp[2][1] + temp[5][1];
+        out[5][i][0] = temp[3][0] + temp[4][0];
+        out[5][i][1] = temp[3][1] + temp[4][1];
+    }
+}
+
+static void hybrid4_8_12_cx(float (*in)[2], float (*out)[32][2], const float (*filter)[7][2], int N, int len)
+{
+    int i, j, ssb;
+
+    for (i = 0; i < len; i++) {
+        for (ssb = 0; ssb < N; ssb++) {
+            float sum_re = filter[ssb][6][0] * in[i+6][0], sum_im = filter[ssb][6][0] * in[i+6][1];
+            for (j = 0; j < 6; j++) {
+                float in0_re = in[i+j][0];
+                float in0_im = in[i+j][1];
+                float in1_re = in[i+12-j][0];
+                float in1_im = in[i+12-j][1];
+                sum_re += filter[ssb][j][0] * (in0_re + in1_re) - filter[ssb][j][1] * (in0_im - in1_im);
+                sum_im += filter[ssb][j][0] * (in0_im + in1_im) + filter[ssb][j][1] * (in0_re - in1_re);
+            }
+            out[ssb][i][0] = sum_re;
+            out[ssb][i][1] = sum_im;
+        }
+    }
+}
+
+static void hybrid_analysis(float out[91][32][2], float in[5][44][2], float L[2][38][64], int is34, int len)
+{
+    int i, j;
+    for (i = 0; i < 5; i++) {
+        for (j = 0; j < 38; j++) {
+            in[i][j+6][0] = L[0][j][i];
+            in[i][j+6][1] = L[1][j][i];
+        }
+    }
+    if(is34) {
+        hybrid4_8_12_cx(in[0], out,    f34_0_12, 12, len);
+        hybrid4_8_12_cx(in[1], out+12, f34_1_8,   8, len);
+        hybrid4_8_12_cx(in[2], out+20, f34_2_4,   4, len);
+        hybrid4_8_12_cx(in[3], out+24, f34_2_4,   4, len);
+        hybrid4_8_12_cx(in[4], out+28, f34_2_4,   4, len);
+        for (i = 0; i < 59; i++) {
+            for (j = 0; j < len; j++) {
+                out[i+32][j][0] = L[0][j][i+5];
+                out[i+32][j][1] = L[1][j][i+5];
+            }
+        }
+    } else {
+        hybrid6_cx(in[0], out, f20_0_8, len);
+        hybrid2_re(in[1], out+6, g1_Q2, len, 1);
+        hybrid2_re(in[2], out+8, g1_Q2, len, 0);
+        for (i = 0; i < 61; i++) {
+            for (j = 0; j < len; j++) {
+                out[i+10][j][0] = L[0][j][i+3];
+                out[i+10][j][1] = L[1][j][i+3];
+            }
+        }
+    }
+    //update in_buf
+    for (i = 0; i < 5; i++) {
+        memcpy(in[i], in[i]+32, 6 * sizeof(in[i][0]));
+    }
+}
+
+static void hybrid_synthesis(float out[2][38][64], float in[91][32][2], int is34, int len)
+{
+    int i, n;
+    if(is34) {
+        for (n = 0; n < len; n++) {
+            memset(out[0][n], 0, 5*sizeof(out[0][n][0]));
+            memset(out[1][n], 0, 5*sizeof(out[1][n][0]));
+            for(i = 0; i < 12; i++) {
+                out[0][n][0] += in[   i][n][0];
+                out[1][n][0] += in[   i][n][1];
+            }
+            for(i = 0; i < 8; i++) {
+                out[0][n][1] += in[12+i][n][0];
+                out[1][n][1] += in[12+i][n][1];
+            }
+            for(i = 0; i < 4; i++) {
+                out[0][n][2] += in[20+i][n][0];
+                out[1][n][2] += in[20+i][n][1];
+                out[0][n][3] += in[24+i][n][0];
+                out[1][n][3] += in[24+i][n][1];
+                out[0][n][4] += in[28+i][n][0];
+                out[1][n][4] += in[28+i][n][1];
+            }
+        }
+        for (i = 0; i < 59; i++) {
+            for (n = 0; n < len; n++) {
+                out[0][n][i+5] = in[i+32][n][0];
+                out[1][n][i+5] = in[i+32][n][1];
+            }
+        }
+    } else {
+        for (n = 0; n < len; n++) {
+            out[0][n][0] = in[0][n][0] + in[1][n][0] + in[2][n][0] +
+                           in[3][n][0] + in[4][n][0] + in[5][n][0];
+            out[1][n][0] = in[0][n][1] + in[1][n][1] + in[2][n][1] +
+                           in[3][n][1] + in[4][n][1] + in[5][n][1];
+            out[0][n][1] = in[6][n][0] + in[7][n][0];
+            out[1][n][1] = in[6][n][1] + in[7][n][1];
+            out[0][n][2] = in[8][n][0] + in[9][n][0];
+            out[1][n][2] = in[8][n][1] + in[9][n][1];
+        }
+        for (i = 0; i < 61; i++) {
+            for (n = 0; n < len; n++) {
+                out[0][n][i+3] = in[i+10][n][0];
+                out[1][n][i+3] = in[i+10][n][1];
+            }
+        }
+    }
+}
+
+/// All-pass filter decay slope
+#define DECAY_SLOPE      0.05f
+/// Number of frequency bands that can be addressed by the parameter index, b(k)
+static const int   NR_PAR_BANDS[]      = { 20, 34 };
+/// Number of frequency bands that can be addressed by the sub subband index, k
+static const int   NR_BANDS[]          = { 71, 91 };
+/// Start frequency band for the all-pass filter decay slope
+static const int   DECAY_CUTOFF[]      = { 10, 32 };
+/// Number of all-pass filer bands
+static const int   NR_ALLPASS_BANDS[]  = { 30, 50 };
+/// First stereo band using the short one sample delay
+static const int   SHORT_DELAY_BAND[]  = { 42, 62 };
+
+/** Table 8.46 */
+static void map_idx_10_to_20(int8_t *par_mapped, const int8_t *par, int full)
+{
+    int b;
+    if (full)
+        b = 9;
+    else {
+        b = 4;
+        par_mapped[10] = 0;
+    }
+    for (; b >= 0; b--) {
+        par_mapped[2*b+1] = par_mapped[2*b] = par[b];
+    }
+}
+
+static void map_idx_34_to_20(int8_t *par_mapped, const int8_t *par, int full)
+{
+    par_mapped[ 0] = (2*par[ 0] +   par[ 1]) / 3;
+    par_mapped[ 1] = (  par[ 1] + 2*par[ 2]) / 3;
+    par_mapped[ 2] = (2*par[ 3] +   par[ 4]) / 3;
+    par_mapped[ 3] = (  par[ 4] + 2*par[ 5]) / 3;
+    par_mapped[ 4] = (  par[ 6] +   par[ 7]) / 2;
+    par_mapped[ 5] = (  par[ 8] +   par[ 9]) / 2;
+    par_mapped[ 6] =    par[10];
+    par_mapped[ 7] =    par[11];
+    par_mapped[ 8] = (  par[12] +   par[13]) / 2;
+    par_mapped[ 9] = (  par[14] +   par[15]) / 2;
+    par_mapped[10] =    par[16];
+    if (full) {
+        par_mapped[11] =    par[17];
+        par_mapped[12] =    par[18];
+        par_mapped[13] =    par[19];
+        par_mapped[14] = (  par[20] +   par[21]) / 2;
+        par_mapped[15] = (  par[22] +   par[23]) / 2;
+        par_mapped[16] = (  par[24] +   par[25]) / 2;
+        par_mapped[17] = (  par[26] +   par[27]) / 2;
+        par_mapped[18] = (  par[28] +   par[29] +   par[30] +   par[31]) / 4;
+        par_mapped[19] = (  par[32] +   par[33]) / 2;
+    }
+}
+
+static void map_val_34_to_20(float par[PS_MAX_NR_IIDICC])
+{
+    par[ 0] = (2*par[ 0] +   par[ 1]) * 0.33333333f;
+    par[ 1] = (  par[ 1] + 2*par[ 2]) * 0.33333333f;
+    par[ 2] = (2*par[ 3] +   par[ 4]) * 0.33333333f;
+    par[ 3] = (  par[ 4] + 2*par[ 5]) * 0.33333333f;
+    par[ 4] = (  par[ 6] +   par[ 7]) * 0.5f;
+    par[ 5] = (  par[ 8] +   par[ 9]) * 0.5f;
+    par[ 6] =    par[10];
+    par[ 7] =    par[11];
+    par[ 8] = (  par[12] +   par[13]) * 0.5f;
+    par[ 9] = (  par[14] +   par[15]) * 0.5f;
+    par[10] =    par[16];
+    par[11] =    par[17];
+    par[12] =    par[18];
+    par[13] =    par[19];
+    par[14] = (  par[20] +   par[21]) * 0.5f;
+    par[15] = (  par[22] +   par[23]) * 0.5f;
+    par[16] = (  par[24] +   par[25]) * 0.5f;
+    par[17] = (  par[26] +   par[27]) * 0.5f;
+    par[18] = (  par[28] +   par[29] +   par[30] +   par[31]) * 0.25f;
+    par[19] = (  par[32] +   par[33]) * 0.5f;
+}
+
+static void map_idx_10_to_34(int8_t *par_mapped, const int8_t *par, int full)
+{
+    if (full) {
+        par_mapped[33] = par[9];
+        par_mapped[32] = par[9];
+        par_mapped[31] = par[9];
+        par_mapped[30] = par[9];
+        par_mapped[29] = par[9];
+        par_mapped[28] = par[9];
+        par_mapped[27] = par[8];
+        par_mapped[26] = par[8];
+        par_mapped[25] = par[8];
+        par_mapped[24] = par[8];
+        par_mapped[23] = par[7];
+        par_mapped[22] = par[7];
+        par_mapped[21] = par[7];
+        par_mapped[20] = par[7];
+        par_mapped[19] = par[6];
+        par_mapped[18] = par[6];
+        par_mapped[17] = par[5];
+        par_mapped[16] = par[5];
+    } else {
+        par_mapped[16] =      0;
+    }
+    par_mapped[15] = par[4];
+    par_mapped[14] = par[4];
+    par_mapped[13] = par[4];
+    par_mapped[12] = par[4];
+    par_mapped[11] = par[3];
+    par_mapped[10] = par[3];
+    par_mapped[ 9] = par[2];
+    par_mapped[ 8] = par[2];
+    par_mapped[ 7] = par[2];
+    par_mapped[ 6] = par[2];
+    par_mapped[ 5] = par[1];
+    par_mapped[ 4] = par[1];
+    par_mapped[ 3] = par[1];
+    par_mapped[ 2] = par[0];
+    par_mapped[ 1] = par[0];
+    par_mapped[ 0] = par[0];
+}
+
+static void map_idx_20_to_34(int8_t *par_mapped, const int8_t *par, int full)
+{
+    if (full) {
+        par_mapped[33] =  par[19];
+        par_mapped[32] =  par[19];
+        par_mapped[31] =  par[18];
+        par_mapped[30] =  par[18];
+        par_mapped[29] =  par[18];
+        par_mapped[28] =  par[18];
+        par_mapped[27] =  par[17];
+        par_mapped[26] =  par[17];
+        par_mapped[25] =  par[16];
+        par_mapped[24] =  par[16];
+        par_mapped[23] =  par[15];
+        par_mapped[22] =  par[15];
+        par_mapped[21] =  par[14];
+        par_mapped[20] =  par[14];
+        par_mapped[19] =  par[13];
+        par_mapped[18] =  par[12];
+        par_mapped[17] =  par[11];
+    }
+    par_mapped[16] =  par[10];
+    par_mapped[15] =  par[ 9];
+    par_mapped[14] =  par[ 9];
+    par_mapped[13] =  par[ 8];
+    par_mapped[12] =  par[ 8];
+    par_mapped[11] =  par[ 7];
+    par_mapped[10] =  par[ 6];
+    par_mapped[ 9] =  par[ 5];
+    par_mapped[ 8] =  par[ 5];
+    par_mapped[ 7] =  par[ 4];
+    par_mapped[ 6] =  par[ 4];
+    par_mapped[ 5] =  par[ 3];
+    par_mapped[ 4] = (par[ 2] + par[ 3]) / 2;
+    par_mapped[ 3] =  par[ 2];
+    par_mapped[ 2] =  par[ 1];
+    par_mapped[ 1] = (par[ 0] + par[ 1]) / 2;
+    par_mapped[ 0] =  par[ 0];
+}
+
+static void map_val_20_to_34(float par[PS_MAX_NR_IIDICC])
+{
+    par[33] =  par[19];
+    par[32] =  par[19];
+    par[31] =  par[18];
+    par[30] =  par[18];
+    par[29] =  par[18];
+    par[28] =  par[18];
+    par[27] =  par[17];
+    par[26] =  par[17];
+    par[25] =  par[16];
+    par[24] =  par[16];
+    par[23] =  par[15];
+    par[22] =  par[15];
+    par[21] =  par[14];
+    par[20] =  par[14];
+    par[19] =  par[13];
+    par[18] =  par[12];
+    par[17] =  par[11];
+    par[16] =  par[10];
+    par[15] =  par[ 9];
+    par[14] =  par[ 9];
+    par[13] =  par[ 8];
+    par[12] =  par[ 8];
+    par[11] =  par[ 7];
+    par[10] =  par[ 6];
+    par[ 9] =  par[ 5];
+    par[ 8] =  par[ 5];
+    par[ 7] =  par[ 4];
+    par[ 6] =  par[ 4];
+    par[ 5] =  par[ 3];
+    par[ 4] = (par[ 2] + par[ 3]) * 0.5f;
+    par[ 3] =  par[ 2];
+    par[ 2] =  par[ 1];
+    par[ 1] = (par[ 0] + par[ 1]) * 0.5f;
+    par[ 0] =  par[ 0];
+}
+
+static void decorrelation(PSContext *ps, float (*out)[32][2], const float (*s)[32][2], int is34)
+{
+    float power[34][PS_QMF_TIME_SLOTS] = {{0}};
+    float transient_gain[34][PS_QMF_TIME_SLOTS];
+    float *peak_decay_nrg = ps->peak_decay_nrg;
+    float *power_smooth = ps->power_smooth;
+    float *peak_decay_diff_smooth = ps->peak_decay_diff_smooth;
+    float (*delay)[PS_QMF_TIME_SLOTS + PS_MAX_DELAY][2] = ps->delay;
+    float (*ap_delay)[PS_AP_LINKS][PS_QMF_TIME_SLOTS + PS_MAX_AP_DELAY][2] = ps->ap_delay;
+    const int8_t *k_to_i = is34 ? k_to_i_34 : k_to_i_20;
+    const float peak_decay_factor = 0.76592833836465f;
+    const float transient_impact  = 1.5f;
+    const float a_smooth          = 0.25f; //< Smoothing coefficient
+    int i, k, m, n;
+    int n0 = 0, nL = 32;
+    static const int link_delay[] = { 3, 4, 5 };
+    static const float a[] = { 0.65143905753106f,
+                               0.56471812200776f,
+                               0.48954165955695f };
+
+    if (is34 != ps->is34bands_old) {
+        memset(ps->peak_decay_nrg,         0, sizeof(ps->peak_decay_nrg));
+        memset(ps->power_smooth,           0, sizeof(ps->power_smooth));
+        memset(ps->peak_decay_diff_smooth, 0, sizeof(ps->peak_decay_diff_smooth));
+        memset(ps->delay,                  0, sizeof(ps->delay));
+        memset(ps->ap_delay,               0, sizeof(ps->ap_delay));
+    }
+
+    for (n = n0; n < nL; n++) {
+        for (k = 0; k < NR_BANDS[is34]; k++) {
+            int i = k_to_i[k];
+            power[i][n] += s[k][n][0] * s[k][n][0] + s[k][n][1] * s[k][n][1];
+        }
+    }
+
+    //Transient detection
+    for (i = 0; i < NR_PAR_BANDS[is34]; i++) {
+        for (n = n0; n < nL; n++) {
+            float decayed_peak = peak_decay_factor * peak_decay_nrg[i];
+            float denom;
+            peak_decay_nrg[i] = FFMAX(decayed_peak, power[i][n]);
+            power_smooth[i] += a_smooth * (power[i][n] - power_smooth[i]);
+            peak_decay_diff_smooth[i] += a_smooth * (peak_decay_nrg[i] - power[i][n] - peak_decay_diff_smooth[i]);
+            denom = transient_impact * peak_decay_diff_smooth[i];
+            transient_gain[i][n]   = (denom > power_smooth[i]) ?
+                                         power_smooth[i] / denom : 1.0f;
+        }
+    }
+
+    //Decorrelation and transient reduction
+    //                         PS_AP_LINKS - 1
+    //                               -----
+    //                                | |  Q_fract_allpass[k][m]*z^-link_delay[m] - a[m]*g_decay_slope[k]
+    //H[k][z] = z^-2 * phi_fract[k] * | | ----------------------------------------------------------------
+    //                                | | 1 - a[m]*g_decay_slope[k]*Q_fract_allpass[k][m]*z^-link_delay[m]
+    //                               m = 0
+    //d[k][z] (out) = transient_gain_mapped[k][z] * H[k][z] * s[k][z]
+    for (k = 0; k < NR_ALLPASS_BANDS[is34]; k++) {
+        int b = k_to_i[k];
+        float g_decay_slope = 1.f - DECAY_SLOPE * (k - DECAY_CUTOFF[is34]);
+        float ag[PS_AP_LINKS];
+        g_decay_slope = av_clipf(g_decay_slope, 0.f, 1.f);
+        memcpy(delay[k], delay[k]+nL, PS_MAX_DELAY*sizeof(delay[k][0]));
+        memcpy(delay[k]+PS_MAX_DELAY, s[k], numQMFSlots*sizeof(delay[k][0]));
+        for (m = 0; m < PS_AP_LINKS; m++) {
+            memcpy(ap_delay[k][m],   ap_delay[k][m]+numQMFSlots,           5*sizeof(ap_delay[k][m][0]));
+            ag[m] = a[m] * g_decay_slope;
+        }
+        for (n = n0; n < nL; n++) {
+            float in_re = delay[k][n+PS_MAX_DELAY-2][0] * phi_fract[is34][k][0] -
+                          delay[k][n+PS_MAX_DELAY-2][1] * phi_fract[is34][k][1];
+            float in_im = delay[k][n+PS_MAX_DELAY-2][0] * phi_fract[is34][k][1] +
+                          delay[k][n+PS_MAX_DELAY-2][1] * phi_fract[is34][k][0];
+            for (m = 0; m < PS_AP_LINKS; m++) {
+                float a_re                = ag[m] * in_re;
+                float a_im                = ag[m] * in_im;
+                float link_delay_re       = ap_delay[k][m][n+5-link_delay[m]][0];
+                float link_delay_im       = ap_delay[k][m][n+5-link_delay[m]][1];
+                float fractional_delay_re = Q_fract_allpass[is34][k][m][0];
+                float fractional_delay_im = Q_fract_allpass[is34][k][m][1];
+                ap_delay[k][m][n+5][0] = in_re;
+                ap_delay[k][m][n+5][1] = in_im;
+                in_re = link_delay_re * fractional_delay_re - link_delay_im * fractional_delay_im - a_re;
+                in_im = link_delay_re * fractional_delay_im + link_delay_im * fractional_delay_re - a_im;
+                ap_delay[k][m][n+5][0] += ag[m] * in_re;
+                ap_delay[k][m][n+5][1] += ag[m] * in_im;
+            }
+            out[k][n][0] = transient_gain[b][n] * in_re;
+            out[k][n][1] = transient_gain[b][n] * in_im;
+        }
+    }
+    for (; k < SHORT_DELAY_BAND[is34]; k++) {
+        memcpy(delay[k], delay[k]+nL, PS_MAX_DELAY*sizeof(delay[k][0]));
+        memcpy(delay[k]+PS_MAX_DELAY, s[k], numQMFSlots*sizeof(delay[k][0]));
+        for (n = n0; n < nL; n++) {
+            //H = delay 14
+            out[k][n][0] = transient_gain[k_to_i[k]][n] * delay[k][n+PS_MAX_DELAY-14][0];
+            out[k][n][1] = transient_gain[k_to_i[k]][n] * delay[k][n+PS_MAX_DELAY-14][1];
+        }
+    }
+    for (; k < NR_BANDS[is34]; k++) {
+        memcpy(delay[k], delay[k]+nL, PS_MAX_DELAY*sizeof(delay[k][0]));
+        memcpy(delay[k]+PS_MAX_DELAY, s[k], numQMFSlots*sizeof(delay[k][0]));
+        for (n = n0; n < nL; n++) {
+            //H = delay 1
+            out[k][n][0] = transient_gain[k_to_i[k]][n] * delay[k][n+PS_MAX_DELAY-1][0];
+            out[k][n][1] = transient_gain[k_to_i[k]][n] * delay[k][n+PS_MAX_DELAY-1][1];
+        }
+    }
+}
+
+static void remap34(int8_t (**p_par_mapped)[PS_MAX_NR_IIDICC],
+                    int8_t           (*par)[PS_MAX_NR_IIDICC],
+                    int num_par, int num_env, int full)
+{
+    int8_t (*par_mapped)[PS_MAX_NR_IIDICC] = *p_par_mapped;
+    int e;
+    if (num_par == 20 || num_par == 11) {
+        for (e = 0; e < num_env; e++) {
+            map_idx_20_to_34(par_mapped[e], par[e], full);
+        }
+    } else if (num_par == 10 || num_par == 5) {
+        for (e = 0; e < num_env; e++) {
+            map_idx_10_to_34(par_mapped[e], par[e], full);
+        }
+    } else {
+        *p_par_mapped = par;
+    }
+}
+
+static void remap20(int8_t (**p_par_mapped)[PS_MAX_NR_IIDICC],
+                    int8_t           (*par)[PS_MAX_NR_IIDICC],
+                    int num_par, int num_env, int full)
+{
+    int8_t (*par_mapped)[PS_MAX_NR_IIDICC] = *p_par_mapped;
+    int e;
+    if (num_par == 34 || num_par == 17) {
+        for (e = 0; e < num_env; e++) {
+            map_idx_34_to_20(par_mapped[e], par[e], full);
+        }
+    } else if (num_par == 10 || num_par == 5) {
+        for (e = 0; e < num_env; e++) {
+            map_idx_10_to_20(par_mapped[e], par[e], full);
+        }
+    } else {
+        *p_par_mapped = par;
+    }
+}
+
+static void stereo_processing(PSContext *ps, float (*l)[32][2], float (*r)[32][2], int is34)
+{
+    int e, b, k, n;
+
+    float (*H11)[PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC] = ps->H11;
+    float (*H12)[PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC] = ps->H12;
+    float (*H21)[PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC] = ps->H21;
+    float (*H22)[PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC] = ps->H22;
+    int8_t *opd_hist = ps->opd_hist;
+    int8_t *ipd_hist = ps->ipd_hist;
+    int8_t iid_mapped_buf[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC];
+    int8_t icc_mapped_buf[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC];
+    int8_t ipd_mapped_buf[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC];
+    int8_t opd_mapped_buf[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC];
+    int8_t (*iid_mapped)[PS_MAX_NR_IIDICC] = iid_mapped_buf;
+    int8_t (*icc_mapped)[PS_MAX_NR_IIDICC] = icc_mapped_buf;
+    int8_t (*ipd_mapped)[PS_MAX_NR_IIDICC] = ipd_mapped_buf;
+    int8_t (*opd_mapped)[PS_MAX_NR_IIDICC] = opd_mapped_buf;
+    const int8_t *k_to_i = is34 ? k_to_i_34 : k_to_i_20;
+    const float (*H_LUT)[8][4] = (PS_BASELINE || ps->icc_mode < 3) ? HA : HB;
+
+    //Remapping
+    for (b = 0; b < PS_MAX_NR_IIDICC; b++) {
+        H11[0][0][b] = H11[0][ps->num_env_old][b];
+        H12[0][0][b] = H12[0][ps->num_env_old][b];
+        H21[0][0][b] = H21[0][ps->num_env_old][b];
+        H22[0][0][b] = H22[0][ps->num_env_old][b];
+        H11[1][0][b] = H11[1][ps->num_env_old][b];
+        H12[1][0][b] = H12[1][ps->num_env_old][b];
+        H21[1][0][b] = H21[1][ps->num_env_old][b];
+        H22[1][0][b] = H22[1][ps->num_env_old][b];
+    }
+    if (is34) {
+        remap34(&iid_mapped, ps->iid_par, ps->nr_iid_par, ps->num_env, 1);
+        remap34(&icc_mapped, ps->icc_par, ps->nr_icc_par, ps->num_env, 1);
+        if (ps->enable_ipdopd) {
+            remap34(&ipd_mapped, ps->ipd_par, ps->nr_ipdopd_par, ps->num_env, 0);
+            remap34(&opd_mapped, ps->opd_par, ps->nr_ipdopd_par, ps->num_env, 0);
+        }
+        if (!ps->is34bands_old) {
+            map_val_20_to_34(H11[0][0]);
+            map_val_20_to_34(H11[1][0]);
+            map_val_20_to_34(H12[0][0]);
+            map_val_20_to_34(H12[1][0]);
+            map_val_20_to_34(H21[0][0]);
+            map_val_20_to_34(H21[1][0]);
+            map_val_20_to_34(H22[0][0]);
+            map_val_20_to_34(H22[1][0]);
+            ipdopd_reset(ipd_hist, opd_hist);
+        }
+    } else {
+        remap20(&iid_mapped, ps->iid_par, ps->nr_iid_par, ps->num_env, 1);
+        remap20(&icc_mapped, ps->icc_par, ps->nr_icc_par, ps->num_env, 1);
+        if (ps->enable_ipdopd) {
+            remap20(&ipd_mapped, ps->ipd_par, ps->nr_ipdopd_par, ps->num_env, 0);
+            remap20(&opd_mapped, ps->opd_par, ps->nr_ipdopd_par, ps->num_env, 0);
+        }
+        if (ps->is34bands_old) {
+            map_val_34_to_20(H11[0][0]);
+            map_val_34_to_20(H11[1][0]);
+            map_val_34_to_20(H12[0][0]);
+            map_val_34_to_20(H12[1][0]);
+            map_val_34_to_20(H21[0][0]);
+            map_val_34_to_20(H21[1][0]);
+            map_val_34_to_20(H22[0][0]);
+            map_val_34_to_20(H22[1][0]);
+            ipdopd_reset(ipd_hist, opd_hist);
+        }
+    }
+
+    //Mixing
+    for (e = 0; e < ps->num_env; e++) {
+        for (b = 0; b < NR_PAR_BANDS[is34]; b++) {
+            float h11, h12, h21, h22;
+            h11 = H_LUT[iid_mapped[e][b] + 7 + 23 * ps->iid_quant][icc_mapped[e][b]][0];
+            h12 = H_LUT[iid_mapped[e][b] + 7 + 23 * ps->iid_quant][icc_mapped[e][b]][1];
+            h21 = H_LUT[iid_mapped[e][b] + 7 + 23 * ps->iid_quant][icc_mapped[e][b]][2];
+            h22 = H_LUT[iid_mapped[e][b] + 7 + 23 * ps->iid_quant][icc_mapped[e][b]][3];
+            if (!PS_BASELINE && ps->enable_ipdopd && b < ps->nr_ipdopd_par) {
+                //The spec say says to only run this smoother when enable_ipdopd
+                //is set but the reference decoder appears to run it constantly
+                float h11i, h12i, h21i, h22i;
+                float ipd_adj_re, ipd_adj_im;
+                int opd_idx = opd_hist[b] * 8 + opd_mapped[e][b];
+                int ipd_idx = ipd_hist[b] * 8 + ipd_mapped[e][b];
+                float opd_re = pd_re_smooth[opd_idx];
+                float opd_im = pd_im_smooth[opd_idx];
+                float ipd_re = pd_re_smooth[ipd_idx];
+                float ipd_im = pd_im_smooth[ipd_idx];
+                opd_hist[b] = opd_idx & 0x3F;
+                ipd_hist[b] = ipd_idx & 0x3F;
+
+                ipd_adj_re = opd_re*ipd_re + opd_im*ipd_im;
+                ipd_adj_im = opd_im*ipd_re - opd_re*ipd_im;
+                h11i = h11 * opd_im;
+                h11  = h11 * opd_re;
+                h12i = h12 * ipd_adj_im;
+                h12  = h12 * ipd_adj_re;
+                h21i = h21 * opd_im;
+                h21  = h21 * opd_re;
+                h22i = h22 * ipd_adj_im;
+                h22  = h22 * ipd_adj_re;
+                H11[1][e+1][b] = h11i;
+                H12[1][e+1][b] = h12i;
+                H21[1][e+1][b] = h21i;
+                H22[1][e+1][b] = h22i;
+            }
+            H11[0][e+1][b] = h11;
+            H12[0][e+1][b] = h12;
+            H21[0][e+1][b] = h21;
+            H22[0][e+1][b] = h22;
+        }
+        for (k = 0; k < NR_BANDS[is34]; k++) {
+            float h11r, h12r, h21r, h22r;
+            float h11i, h12i, h21i, h22i;
+            float h11r_step, h12r_step, h21r_step, h22r_step;
+            float h11i_step, h12i_step, h21i_step, h22i_step;
+            int start = ps->border_position[e];
+            int stop  = ps->border_position[e+1];
+            float width = 1.f / (stop - start);
+            b = k_to_i[k];
+            h11r = H11[0][e][b];
+            h12r = H12[0][e][b];
+            h21r = H21[0][e][b];
+            h22r = H22[0][e][b];
+            if (!PS_BASELINE && ps->enable_ipdopd) {
+            //Is this necessary? ps_04_new seems unchanged
+            if ((is34 && k <= 13 && k >= 9) || (!is34 && k <= 1)) {
+                h11i = -H11[1][e][b];
+                h12i = -H12[1][e][b];
+                h21i = -H21[1][e][b];
+                h22i = -H22[1][e][b];
+            } else {
+                h11i = H11[1][e][b];
+                h12i = H12[1][e][b];
+                h21i = H21[1][e][b];
+                h22i = H22[1][e][b];
+            }
+            }
+            //Interpolation
+            h11r_step = (H11[0][e+1][b] - h11r) * width;
+            h12r_step = (H12[0][e+1][b] - h12r) * width;
+            h21r_step = (H21[0][e+1][b] - h21r) * width;
+            h22r_step = (H22[0][e+1][b] - h22r) * width;
+            if (!PS_BASELINE && ps->enable_ipdopd) {
+                h11i_step = (H11[1][e+1][b] - h11i) * width;
+                h12i_step = (H12[1][e+1][b] - h12i) * width;
+                h21i_step = (H21[1][e+1][b] - h21i) * width;
+                h22i_step = (H22[1][e+1][b] - h22i) * width;
+            }
+            for (n = start + 1; n <= stop; n++) {
+                //l is s, r is d
+                float l_re = l[k][n][0];
+                float l_im = l[k][n][1];
+                float r_re = r[k][n][0];
+                float r_im = r[k][n][1];
+                h11r += h11r_step;
+                h12r += h12r_step;
+                h21r += h21r_step;
+                h22r += h22r_step;
+                if (!PS_BASELINE && ps->enable_ipdopd) {
+                h11i += h11i_step;
+                h12i += h12i_step;
+                h21i += h21i_step;
+                h22i += h22i_step;
+
+                l[k][n][0] = h11r*l_re + h21r*r_re - h11i*l_im - h21i*r_im;
+                l[k][n][1] = h11r*l_im + h21r*r_im + h11i*l_re + h21i*r_re;
+                r[k][n][0] = h12r*l_re + h22r*r_re - h12i*l_im - h22i*r_im;
+                r[k][n][1] = h12r*l_im + h22r*r_im + h12i*l_re + h22i*r_re;
+                } else {
+                l[k][n][0] = h11r*l_re + h21r*r_re;
+                l[k][n][1] = h11r*l_im + h21r*r_im;
+                r[k][n][0] = h12r*l_re + h22r*r_re;
+                r[k][n][1] = h12r*l_im + h22r*r_im;
+                }
+            }
+        }
+    }
+}
+
+int ff_ps_apply(AVCodecContext *avctx, PSContext *ps, float L[2][38][64], float R[2][38][64], int top)
+{
+    float Lbuf[91][32][2];
+    float Rbuf[91][32][2];
+    const int len = 32;
+    int is34 = ps->is34bands;
+
+    top += NR_BANDS[is34] - 64;
+    memset(ps->delay+top, 0, (NR_BANDS[is34] - top)*sizeof(ps->delay[0]));
+    if (top < NR_ALLPASS_BANDS[is34])
+        memset(ps->ap_delay + top, 0, (NR_ALLPASS_BANDS[is34] - top)*sizeof(ps->ap_delay[0]));
+
+    hybrid_analysis(Lbuf, ps->in_buf, L, is34, len);
+    decorrelation(ps, Rbuf, Lbuf, is34);
+    stereo_processing(ps, Lbuf, Rbuf, is34);
+    hybrid_synthesis(L, Lbuf, is34, len);
+    hybrid_synthesis(R, Rbuf, is34, len);
+
+    return 0;
+}
+
+#define PS_INIT_VLC_STATIC(num, size) \
+    INIT_VLC_STATIC(&vlc_ps[num], 9, ps_tmp[num].table_size / ps_tmp[num].elem_size,    \
+                    ps_tmp[num].ps_bits, 1, 1,                                          \
+                    ps_tmp[num].ps_codes, ps_tmp[num].elem_size, ps_tmp[num].elem_size, \
+                    size);
+
+#define PS_VLC_ROW(name) \
+    { name ## _codes, name ## _bits, sizeof(name ## _codes), sizeof(name ## _codes[0]) }
+
+av_cold void ff_ps_init(void) {
+    // Syntax initialization
+    static const struct {
+        const void *ps_codes, *ps_bits;
+        const unsigned int table_size, elem_size;
+    } ps_tmp[] = {
+        PS_VLC_ROW(huff_iid_df1),
+        PS_VLC_ROW(huff_iid_dt1),
+        PS_VLC_ROW(huff_iid_df0),
+        PS_VLC_ROW(huff_iid_dt0),
+        PS_VLC_ROW(huff_icc_df),
+        PS_VLC_ROW(huff_icc_dt),
+        PS_VLC_ROW(huff_ipd_df),
+        PS_VLC_ROW(huff_ipd_dt),
+        PS_VLC_ROW(huff_opd_df),
+        PS_VLC_ROW(huff_opd_dt),
+    };
+
+    PS_INIT_VLC_STATIC(0, 1544);
+    PS_INIT_VLC_STATIC(1,  832);
+    PS_INIT_VLC_STATIC(2, 1024);
+    PS_INIT_VLC_STATIC(3, 1036);
+    PS_INIT_VLC_STATIC(4,  544);
+    PS_INIT_VLC_STATIC(5,  544);
+    PS_INIT_VLC_STATIC(6,  512);
+    PS_INIT_VLC_STATIC(7,  512);
+    PS_INIT_VLC_STATIC(8,  512);
+    PS_INIT_VLC_STATIC(9,  512);
+
+    ps_tableinit();
+}
+
+av_cold void ff_ps_ctx_init(PSContext *ps)
+{
+    ipdopd_reset(ps->ipd_hist, ps->opd_hist);
+}