updated: internal ffmpeg to c3beafa0f1

Update internal FFmpeg to c3beafa0f1 from
git://git.ffmpeg.org/ffmpeg.git.

This update adds a new library, libavcore, which contains common
multimedia utilities. Build scripts are updated to handle it (both
internal and external). FFmpeg is no longer built with libfaad as it
now supports LATM AAC audio natively. The unused build_xbmc.sh script is
removed.

The patchset in ffmpeg/patches has been updated, removals and additions
are documented below.

The following patches have been removed as no longer necessary:
- Ticket #5481 - added support for LATM encapsulated AAC audio streams
  within FFmpeg (thanks Paul Kendall).
- re-add libfaad wrapper to ffmpeg for now
- added: ffmpeg spdif demuxer (fixes ac3-in-wav)
- ffmpeg issue2137 patch for MKV (fixes #9014)
- ffmpeg issue2137 patch for AVI (fixes #9014)
- fixed: bitstream mode improperly set. Ticket #10981.
- Add av_popcount() to libavutil/common.h and bump minor version
- added: export DTS profile information in ffmpeg
- Add av_get_profile_name() to get profile names.
- Show profile in avcodec_string().
- libfaac: add recognized profiles array
- dca: add profile names
- h264: add profile names for the existing defines
- dca: consider a stream with XXCh/X96 in ExSS as DTS-HD HRA
- added: metadata support to oggenc with vorbis streams (submitted
  upstream Issue #555)

The following patch has been removed as its purpose is unclear and
upstream code has diverged (passthrough works even without it):
- Setup wanted pkt size in spdif muxers header parser

The following patch:
- When PMT is found, we have found mpegts header information, and
  av_find_stream_info doesn't need to read more to find streams
has been re-replaced with
- Speed up mpegts av_find_stream_info.
The latter was apparently accidentally reverted in the previous FFmpeg
update.

The following patch has been added to fix a build regression with the
configure flags we use on darwin:
- swscale: fix build with --enable-runtime-cpudetect
  --disable-mmx/mmx2/amd3dnow

1 files changed, 344 insertions, 45 deletions

diff --git a/lib/ffmpeg/libavcodec/aacpsy.c b/lib/ffmpeg/libavcodec/aacpsy.c
index 466b0e9a1a..a987be0abb 100644
--- a/lib/ffmpeg/libavcodec/aacpsy.c
+++ b/lib/ffmpeg/libavcodec/aacpsy.c
@@ -39,11 +39,19 @@
  * constants for 3GPP AAC psychoacoustic model
  * @{
  */
-#define PSY_3GPP_SPREAD_LOW  1.5f // spreading factor for ascending threshold spreading  (15 dB/Bark)
-#define PSY_3GPP_SPREAD_HI   3.0f // spreading factor for descending threshold spreading (30 dB/Bark)
+#define PSY_3GPP_SPREAD_HI   1.5f // spreading factor for ascending threshold spreading  (15 dB/Bark)
+#define PSY_3GPP_SPREAD_LOW  3.0f // spreading factor for descending threshold spreading (30 dB/Bark)
 
 #define PSY_3GPP_RPEMIN      0.01f
 #define PSY_3GPP_RPELEV      2.0f
+
+/* LAME psy model constants */
+#define PSY_LAME_FIR_LEN 21         ///< LAME psy model FIR order
+#define AAC_BLOCK_SIZE_LONG 1024    ///< long block size
+#define AAC_BLOCK_SIZE_SHORT 128    ///< short block size
+#define AAC_NUM_BLOCKS_SHORT 8      ///< number of blocks in a short sequence
+#define PSY_LAME_NUM_SUBBLOCKS 3    ///< Number of sub-blocks in each short block
+
 /**
  * @}
  */
@@ -51,44 +59,156 @@
 /**
  * information for single band used by 3GPP TS26.403-inspired psychoacoustic model
  */
-typedef struct Psy3gppBand{
+typedef struct AacPsyBand{
     float energy;    ///< band energy
     float ffac;      ///< form factor
     float thr;       ///< energy threshold
     float min_snr;   ///< minimal SNR
     float thr_quiet; ///< threshold in quiet
-}Psy3gppBand;
+}AacPsyBand;
 
 /**
  * single/pair channel context for psychoacoustic model
  */
-typedef struct Psy3gppChannel{
-    Psy3gppBand band[128];               ///< bands information
-    Psy3gppBand prev_band[128];          ///< bands information from the previous frame
+typedef struct AacPsyChannel{
+    AacPsyBand band[128];               ///< bands information
+    AacPsyBand prev_band[128];          ///< bands information from the previous frame
 
     float       win_energy;              ///< sliding average of channel energy
     float       iir_state[2];            ///< hi-pass IIR filter state
     uint8_t     next_grouping;           ///< stored grouping scheme for the next frame (in case of 8 short window sequence)
     enum WindowSequence next_window_seq; ///< window sequence to be used in the next frame
-}Psy3gppChannel;
+    /* LAME psy model specific members */
+    float attack_threshold;              ///< attack threshold for this channel
+    float prev_energy_subshort[AAC_NUM_BLOCKS_SHORT * PSY_LAME_NUM_SUBBLOCKS];
+    int   prev_attack;                   ///< attack value for the last short block in the previous sequence
+}AacPsyChannel;
 
 /**
  * psychoacoustic model frame type-dependent coefficients
  */
-typedef struct Psy3gppCoeffs{
+typedef struct AacPsyCoeffs{
     float ath       [64]; ///< absolute threshold of hearing per bands
     float barks     [64]; ///< Bark value for each spectral band in long frame
     float spread_low[64]; ///< spreading factor for low-to-high threshold spreading in long frame
     float spread_hi [64]; ///< spreading factor for high-to-low threshold spreading in long frame
-}Psy3gppCoeffs;
+}AacPsyCoeffs;
 
 /**
  * 3GPP TS26.403-inspired psychoacoustic model specific data
  */
-typedef struct Psy3gppContext{
-    Psy3gppCoeffs psy_coef[2];
-    Psy3gppChannel *ch;
-}Psy3gppContext;
+typedef struct AacPsyContext{
+    AacPsyCoeffs psy_coef[2];
+    AacPsyChannel *ch;
+}AacPsyContext;
+
+/**
+ * LAME psy model preset struct
+ */
+typedef struct {
+    int   quality;  ///< Quality to map the rest of the vaules to.
+     /* This is overloaded to be both kbps per channel in ABR mode, and
+      * requested quality in constant quality mode.
+      */
+    float st_lrm;   ///< short threshold for L, R, and M channels
+} PsyLamePreset;
+
+/**
+ * LAME psy model preset table for ABR
+ */
+static const PsyLamePreset psy_abr_map[] = {
+/* TODO: Tuning. These were taken from LAME. */
+/* kbps/ch st_lrm   */
+    {  8,  6.60},
+    { 16,  6.60},
+    { 24,  6.60},
+    { 32,  6.60},
+    { 40,  6.60},
+    { 48,  6.60},
+    { 56,  6.60},
+    { 64,  6.40},
+    { 80,  6.00},
+    { 96,  5.60},
+    {112,  5.20},
+    {128,  5.20},
+    {160,  5.20}
+};
+
+/**
+* LAME psy model preset table for constant quality
+*/
+static const PsyLamePreset psy_vbr_map[] = {
+/* vbr_q  st_lrm    */
+    { 0,  4.20},
+    { 1,  4.20},
+    { 2,  4.20},
+    { 3,  4.20},
+    { 4,  4.20},
+    { 5,  4.20},
+    { 6,  4.20},
+    { 7,  4.20},
+    { 8,  4.20},
+    { 9,  4.20},
+    {10,  4.20}
+};
+
+/**
+ * LAME psy model FIR coefficient table
+ */
+static const float psy_fir_coeffs[] = {
+    -8.65163e-18 * 2, -0.00851586 * 2, -6.74764e-18 * 2, 0.0209036 * 2,
+    -3.36639e-17 * 2, -0.0438162 * 2,  -1.54175e-17 * 2, 0.0931738 * 2,
+    -5.52212e-17 * 2, -0.313819 * 2
+};
+
+/**
+ * calculates the attack threshold for ABR from the above table for the LAME psy model
+ */
+static float lame_calc_attack_threshold(int bitrate)
+{
+    /* Assume max bitrate to start with */
+    int lower_range = 12, upper_range = 12;
+    int lower_range_kbps = psy_abr_map[12].quality;
+    int upper_range_kbps = psy_abr_map[12].quality;
+    int i;
+
+    /* Determine which bitrates the value specified falls between.
+     * If the loop ends without breaking our above assumption of 320kbps was correct.
+     */
+    for (i = 1; i < 13; i++) {
+        if (FFMAX(bitrate, psy_abr_map[i].quality) != bitrate) {
+            upper_range = i;
+            upper_range_kbps = psy_abr_map[i    ].quality;
+            lower_range = i - 1;
+            lower_range_kbps = psy_abr_map[i - 1].quality;
+            break; /* Upper range found */
+        }
+    }
+
+    /* Determine which range the value specified is closer to */
+    if ((upper_range_kbps - bitrate) > (bitrate - lower_range_kbps))
+        return psy_abr_map[lower_range].st_lrm;
+    return psy_abr_map[upper_range].st_lrm;
+}
+
+/**
+ * LAME psy model specific initialization
+ */
+static void lame_window_init(AacPsyContext *ctx, AVCodecContext *avctx) {
+    int i, j;
+
+    for (i = 0; i < avctx->channels; i++) {
+        AacPsyChannel *pch = &ctx->ch[i];
+
+        if (avctx->flags & CODEC_FLAG_QSCALE)
+            pch->attack_threshold = psy_vbr_map[avctx->global_quality / FF_QP2LAMBDA].st_lrm;
+        else
+            pch->attack_threshold = lame_calc_attack_threshold(avctx->bit_rate / avctx->channels / 1000);
+
+        for (j = 0; j < AAC_NUM_BLOCKS_SHORT * PSY_LAME_NUM_SUBBLOCKS; j++)
+            pch->prev_energy_subshort[j] = 10.0f;
+    }
+}
 
 /**
  * Calculate Bark value for given line.
@@ -113,25 +233,25 @@ static av_cold float ath(float f, float add)
 }
 
 static av_cold int psy_3gpp_init(FFPsyContext *ctx) {
-    Psy3gppContext *pctx;
-    float barks[1024];
+    AacPsyContext *pctx;
+    float bark;
     int i, j, g, start;
     float prev, minscale, minath;
 
-    ctx->model_priv_data = av_mallocz(sizeof(Psy3gppContext));
-    pctx = (Psy3gppContext*) ctx->model_priv_data;
+    ctx->model_priv_data = av_mallocz(sizeof(AacPsyContext));
+    pctx = (AacPsyContext*) ctx->model_priv_data;
 
-    for (i = 0; i < 1024; i++)
-        barks[i] = calc_bark(i * ctx->avctx->sample_rate / 2048.0);
     minath = ath(3410, ATH_ADD);
     for (j = 0; j < 2; j++) {
-        Psy3gppCoeffs *coeffs = &pctx->psy_coef[j];
+        AacPsyCoeffs *coeffs = &pctx->psy_coef[j];
+        float line_to_frequency = ctx->avctx->sample_rate / (j ? 256.f : 2048.0f);
         i = 0;
         prev = 0.0;
         for (g = 0; g < ctx->num_bands[j]; g++) {
             i += ctx->bands[j][g];
-            coeffs->barks[g] = (barks[i - 1] + prev) / 2.0;
-            prev = barks[i - 1];
+            bark = calc_bark((i-1) * line_to_frequency);
+            coeffs->barks[g] = (bark + prev) / 2.0;
+            prev = bark;
         }
         for (g = 0; g < ctx->num_bands[j] - 1; g++) {
             coeffs->spread_low[g] = pow(10.0, -(coeffs->barks[g+1] - coeffs->barks[g]) * PSY_3GPP_SPREAD_LOW);
@@ -139,15 +259,18 @@ static av_cold int psy_3gpp_init(FFPsyContext *ctx) {
         }
         start = 0;
         for (g = 0; g < ctx->num_bands[j]; g++) {
-            minscale = ath(ctx->avctx->sample_rate * start / 1024.0, ATH_ADD);
+            minscale = ath(start * line_to_frequency, ATH_ADD);
             for (i = 1; i < ctx->bands[j][g]; i++)
-                minscale = FFMIN(minscale, ath(ctx->avctx->sample_rate * (start + i) / 1024.0 / 2.0, ATH_ADD));
+                minscale = FFMIN(minscale, ath((start + i) * line_to_frequency, ATH_ADD));
             coeffs->ath[g] = minscale - minath;
             start += ctx->bands[j][g];
         }
     }
 
-    pctx->ch = av_mallocz(sizeof(Psy3gppChannel) * ctx->avctx->channels);
+    pctx->ch = av_mallocz(sizeof(AacPsyChannel) * ctx->avctx->channels);
+
+    lame_window_init(pctx, ctx->avctx);
+
     return 0;
 }
 
@@ -182,8 +305,8 @@ static FFPsyWindowInfo psy_3gpp_window(FFPsyContext *ctx,
     int i, j;
     int br               = ctx->avctx->bit_rate / ctx->avctx->channels;
     int attack_ratio     = br <= 16000 ? 18 : 10;
-    Psy3gppContext *pctx = (Psy3gppContext*) ctx->model_priv_data;
-    Psy3gppChannel *pch  = &pctx->ch[channel];
+    AacPsyContext *pctx = (AacPsyContext*) ctx->model_priv_data;
+    AacPsyChannel *pch  = &pctx->ch[channel];
     uint8_t grouping     = 0;
     int next_type        = pch->next_window_seq;
     FFPsyWindowInfo wi;
@@ -264,24 +387,23 @@ static FFPsyWindowInfo psy_3gpp_window(FFPsyContext *ctx,
  * Calculate band thresholds as suggested in 3GPP TS26.403
  */
 static void psy_3gpp_analyze(FFPsyContext *ctx, int channel,
-                             const float *coefs, FFPsyWindowInfo *wi)
+                             const float *coefs, const FFPsyWindowInfo *wi)
 {
-    Psy3gppContext *pctx = (Psy3gppContext*) ctx->model_priv_data;
-    Psy3gppChannel *pch  = &pctx->ch[channel];
+    AacPsyContext *pctx = (AacPsyContext*) ctx->model_priv_data;
+    AacPsyChannel *pch  = &pctx->ch[channel];
     int start = 0;
     int i, w, g;
     const int num_bands       = ctx->num_bands[wi->num_windows == 8];
     const uint8_t* band_sizes = ctx->bands[wi->num_windows == 8];
-    Psy3gppCoeffs *coeffs     = &pctx->psy_coef[wi->num_windows == 8];
+    AacPsyCoeffs *coeffs     = &pctx->psy_coef[wi->num_windows == 8];
 
     //calculate energies, initial thresholds and related values - 5.4.2 "Threshold Calculation"
     for (w = 0; w < wi->num_windows*16; w += 16) {
         for (g = 0; g < num_bands; g++) {
-            Psy3gppBand *band = &pch->band[w+g];
+            AacPsyBand *band = &pch->band[w+g];
             band->energy = 0.0f;
             for (i = 0; i < band_sizes[g]; i++)
                 band->energy += coefs[start+i] * coefs[start+i];
-            band->energy *= 1.0f / (512*512);
             band->thr     = band->energy * 0.001258925f;
             start        += band_sizes[g];
 
@@ -290,18 +412,16 @@ static void psy_3gpp_analyze(FFPsyContext *ctx, int channel,
     }
     //modify thresholds - spread, threshold in quiet - 5.4.3 "Spreaded Energy Calculation"
     for (w = 0; w < wi->num_windows*16; w += 16) {
-        Psy3gppBand *band = &pch->band[w];
+        AacPsyBand *band = &pch->band[w];
         for (g = 1; g < num_bands; g++)
-            band[g].thr = FFMAX(band[g].thr, band[g-1].thr * coeffs->spread_low[g-1]);
+            band[g].thr = FFMAX(band[g].thr, band[g-1].thr * coeffs->spread_hi [g]);
         for (g = num_bands - 2; g >= 0; g--)
-            band[g].thr = FFMAX(band[g].thr, band[g+1].thr * coeffs->spread_hi [g]);
+            band[g].thr = FFMAX(band[g].thr, band[g+1].thr * coeffs->spread_low[g]);
         for (g = 0; g < num_bands; g++) {
-            band[g].thr_quiet = FFMAX(band[g].thr, coeffs->ath[g]);
-            if (wi->num_windows != 8 && wi->window_type[1] != EIGHT_SHORT_SEQUENCE)
-                band[g].thr_quiet = FFMAX(PSY_3GPP_RPEMIN*band[g].thr_quiet,
-                                          FFMIN(band[g].thr_quiet,
-                                          PSY_3GPP_RPELEV*pch->prev_band[w+g].thr_quiet));
-            band[g].thr = FFMAX(band[g].thr, band[g].thr_quiet * 0.25);
+            band[g].thr_quiet = band[g].thr = FFMAX(band[g].thr, coeffs->ath[g]);
+            if (!(wi->window_type[0] == LONG_STOP_SEQUENCE || (wi->window_type[1] == LONG_START_SEQUENCE && !w)))
+                band[g].thr = FFMAX(PSY_3GPP_RPEMIN*band[g].thr, FFMIN(band[g].thr,
+                                    PSY_3GPP_RPELEV*pch->prev_band[w+g].thr_quiet));
 
             ctx->psy_bands[channel*PSY_MAX_BANDS+w+g].threshold = band[g].thr;
         }
@@ -311,17 +431,196 @@ static void psy_3gpp_analyze(FFPsyContext *ctx, int channel,
 
 static av_cold void psy_3gpp_end(FFPsyContext *apc)
 {
-    Psy3gppContext *pctx = (Psy3gppContext*) apc->model_priv_data;
+    AacPsyContext *pctx = (AacPsyContext*) apc->model_priv_data;
     av_freep(&pctx->ch);
     av_freep(&apc->model_priv_data);
 }
 
+static void lame_apply_block_type(AacPsyChannel *ctx, FFPsyWindowInfo *wi, int uselongblock)
+{
+    int blocktype = ONLY_LONG_SEQUENCE;
+    if (uselongblock) {
+        if (ctx->next_window_seq == EIGHT_SHORT_SEQUENCE)
+            blocktype = LONG_STOP_SEQUENCE;
+    } else {
+        blocktype = EIGHT_SHORT_SEQUENCE;
+        if (ctx->next_window_seq == ONLY_LONG_SEQUENCE)
+            ctx->next_window_seq = LONG_START_SEQUENCE;
+        if (ctx->next_window_seq == LONG_STOP_SEQUENCE)
+            ctx->next_window_seq = EIGHT_SHORT_SEQUENCE;
+    }
+
+    wi->window_type[0] = ctx->next_window_seq;
+    ctx->next_window_seq = blocktype;
+}
+
+static FFPsyWindowInfo psy_lame_window(FFPsyContext *ctx,
+                                       const int16_t *audio, const int16_t *la,
+                                       int channel, int prev_type)
+{
+    AacPsyContext *pctx = (AacPsyContext*) ctx->model_priv_data;
+    AacPsyChannel *pch  = &pctx->ch[channel];
+    int grouping     = 0;
+    int uselongblock = 1;
+    int attacks[AAC_NUM_BLOCKS_SHORT + 1] = { 0 };
+    int i;
+    FFPsyWindowInfo wi;
+
+    memset(&wi, 0, sizeof(wi));
+    if (la) {
+        float hpfsmpl[AAC_BLOCK_SIZE_LONG];
+        float const *pf = hpfsmpl;
+        float attack_intensity[(AAC_NUM_BLOCKS_SHORT + 1) * PSY_LAME_NUM_SUBBLOCKS];
+        float energy_subshort[(AAC_NUM_BLOCKS_SHORT + 1) * PSY_LAME_NUM_SUBBLOCKS];
+        float energy_short[AAC_NUM_BLOCKS_SHORT + 1] = { 0 };
+        int chans = ctx->avctx->channels;
+        const int16_t *firbuf = la + (AAC_BLOCK_SIZE_SHORT/4 - PSY_LAME_FIR_LEN) * chans;
+        int j, att_sum = 0;
+
+        /* LAME comment: apply high pass filter of fs/4 */
+        for (i = 0; i < AAC_BLOCK_SIZE_LONG; i++) {
+            float sum1, sum2;
+            sum1 = firbuf[(i + ((PSY_LAME_FIR_LEN - 1) / 2)) * chans];
+            sum2 = 0.0;
+            for (j = 0; j < ((PSY_LAME_FIR_LEN - 1) / 2) - 1; j += 2) {
+                sum1 += psy_fir_coeffs[j] * (firbuf[(i + j) * chans] + firbuf[(i + PSY_LAME_FIR_LEN - j) * chans]);
+                sum2 += psy_fir_coeffs[j + 1] * (firbuf[(i + j + 1) * chans] + firbuf[(i + PSY_LAME_FIR_LEN - j - 1) * chans]);
+            }
+            hpfsmpl[i] = sum1 + sum2;
+        }
+
+        /* Calculate the energies of each sub-shortblock */
+        for (i = 0; i < PSY_LAME_NUM_SUBBLOCKS; i++) {
+            energy_subshort[i] = pch->prev_energy_subshort[i + ((AAC_NUM_BLOCKS_SHORT - 1) * PSY_LAME_NUM_SUBBLOCKS)];
+            assert(pch->prev_energy_subshort[i + ((AAC_NUM_BLOCKS_SHORT - 2) * PSY_LAME_NUM_SUBBLOCKS + 1)] > 0);
+            attack_intensity[i] = energy_subshort[i] / pch->prev_energy_subshort[i + ((AAC_NUM_BLOCKS_SHORT - 2) * PSY_LAME_NUM_SUBBLOCKS + 1)];
+            energy_short[0] += energy_subshort[i];
+        }
+
+        for (i = 0; i < AAC_NUM_BLOCKS_SHORT * PSY_LAME_NUM_SUBBLOCKS; i++) {
+            float const *const pfe = pf + AAC_BLOCK_SIZE_LONG / (AAC_NUM_BLOCKS_SHORT * PSY_LAME_NUM_SUBBLOCKS);
+            float p = 1.0f;
+            for (; pf < pfe; pf++)
+                if (p < fabsf(*pf))
+                    p = fabsf(*pf);
+            pch->prev_energy_subshort[i] = energy_subshort[i + PSY_LAME_NUM_SUBBLOCKS] = p;
+            energy_short[1 + i / PSY_LAME_NUM_SUBBLOCKS] += p;
+            /* FIXME: The indexes below are [i + 3 - 2] in the LAME source.
+             *          Obviously the 3 and 2 have some significance, or this would be just [i + 1]
+             *          (which is what we use here). What the 3 stands for is ambigious, as it is both
+             *          number of short blocks, and the number of sub-short blocks.
+             *          It seems that LAME is comparing each sub-block to sub-block + 1 in the
+             *          previous block.
+             */
+            if (p > energy_subshort[i + 1])
+                p = p / energy_subshort[i + 1];
+            else if (energy_subshort[i + 1] > p * 10.0f)
+                p = energy_subshort[i + 1] / (p * 10.0f);
+            else
+                p = 0.0;
+            attack_intensity[i + PSY_LAME_NUM_SUBBLOCKS] = p;
+        }
+
+        /* compare energy between sub-short blocks */
+        for (i = 0; i < (AAC_NUM_BLOCKS_SHORT + 1) * PSY_LAME_NUM_SUBBLOCKS; i++)
+            if (!attacks[i / PSY_LAME_NUM_SUBBLOCKS])
+                if (attack_intensity[i] > pch->attack_threshold)
+                    attacks[i / PSY_LAME_NUM_SUBBLOCKS] = (i % PSY_LAME_NUM_SUBBLOCKS) + 1;
+
+        /* should have energy change between short blocks, in order to avoid periodic signals */
+        /* Good samples to show the effect are Trumpet test songs */
+        /* GB: tuned (1) to avoid too many short blocks for test sample TRUMPET */
+        /* RH: tuned (2) to let enough short blocks through for test sample FSOL and SNAPS */
+        for (i = 1; i < AAC_NUM_BLOCKS_SHORT + 1; i++) {
+            float const u = energy_short[i - 1];
+            float const v = energy_short[i];
+            float const m = FFMAX(u, v);
+            if (m < 40000) {                          /* (2) */
+                if (u < 1.7f * v && v < 1.7f * u) {   /* (1) */
+                    if (i == 1 && attacks[0] < attacks[i])
+                        attacks[0] = 0;
+                    attacks[i] = 0;
+                }
+            }
+            att_sum += attacks[i];
+        }
+
+        if (attacks[0] <= pch->prev_attack)
+            attacks[0] = 0;
+
+        att_sum += attacks[0];
+        /* 3 below indicates the previous attack happened in the last sub-block of the previous sequence */
+        if (pch->prev_attack == 3 || att_sum) {
+            uselongblock = 0;
+
+            if (attacks[1] && attacks[0])
+                attacks[1] = 0;
+            if (attacks[2] && attacks[1])
+                attacks[2] = 0;
+            if (attacks[3] && attacks[2])
+                attacks[3] = 0;
+            if (attacks[4] && attacks[3])
+                attacks[4] = 0;
+            if (attacks[5] && attacks[4])
+                attacks[5] = 0;
+            if (attacks[6] && attacks[5])
+                attacks[6] = 0;
+            if (attacks[7] && attacks[6])
+                attacks[7] = 0;
+            if (attacks[8] && attacks[7])
+                attacks[8] = 0;
+        }
+    } else {
+        /* We have no lookahead info, so just use same type as the previous sequence. */
+        uselongblock = !(prev_type == EIGHT_SHORT_SEQUENCE);
+    }
+
+    lame_apply_block_type(pch, &wi, uselongblock);
+
+    wi.window_type[1] = prev_type;
+    if (wi.window_type[0] != EIGHT_SHORT_SEQUENCE) {
+        wi.num_windows  = 1;
+        wi.grouping[0]  = 1;
+        if (wi.window_type[0] == LONG_START_SEQUENCE)
+            wi.window_shape = 0;
+        else
+            wi.window_shape = 1;
+    } else {
+        int lastgrp = 0;
+
+        wi.num_windows = 8;
+        wi.window_shape = 0;
+        for (i = 0; i < 8; i++) {
+            if (!((pch->next_grouping >> i) & 1))
+                lastgrp = i;
+            wi.grouping[lastgrp]++;
+        }
+    }
+
+    /* Determine grouping, based on the location of the first attack, and save for
+     * the next frame.
+     * FIXME: Move this to analysis.
+     * TODO: Tune groupings depending on attack location
+     * TODO: Handle more than one attack in a group
+     */
+    for (i = 0; i < 9; i++) {
+        if (attacks[i]) {
+            grouping = i;
+            break;
+        }
+    }
+    pch->next_grouping = window_grouping[grouping];
+
+    pch->prev_attack = attacks[8];
+
+    return wi;
+}
 
 const FFPsyModel ff_aac_psy_model =
 {
     .name    = "3GPP TS 26.403-inspired model",
     .init    = psy_3gpp_init,
-    .window  = psy_3gpp_window,
+    .window  = psy_lame_window,
     .analyze = psy_3gpp_analyze,
     .end     = psy_3gpp_end,
 };