Merge remote-tracking branch 'qatar/master'

* qatar/master:
  configure: add support for bdver1 and bdver2 CPU types.
  avio: make avio_close NULL the freed buffer
  pixdesc: cosmetics
  proresenc: Don't free a buffer not owned by the codec
  proresenc: Write the full value in one put_bits call
  adpcmenc: Calculate the IMA_QT predictor without overflow
  x86: Add convenience macros to check for CPU extensions and flags
  x86: h264dsp: drop some unnecessary ifdefs around prototype declarations
  mss12: merge decode_pixel() and decode_top_left_pixel()
  mss12: reduce SliceContext size from 1067 to 164 KB
  mss12: move SliceContexts out of the common context into the codec contexts

Conflicts:
	libavformat/aviobuf.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>

9 files changed, 169 insertions, 140 deletions

diff --git a/configure b/configure
index 3abe2313c7..c6ab0585d3 100755
--- a/configure
+++ b/configure
@@ -2404,7 +2404,7 @@ suncc_flags(){
                     prescott|nocona)    echo -xarch=sse3 -xchip=pentium4 ;;
                     *-sse3)             echo -xarch=sse3                 ;;
                     core2)              echo -xarch=ssse3 -xchip=core2   ;;
-                    amdfam10|barcelona)       echo -xarch=sse4_1         ;;
+                    amdfam10|barcelona|bdver*) echo -xarch=sse4_1        ;;
                     athlon-4|athlon-[mx]p)    echo -xarch=ssea           ;;
                     k8|opteron|athlon64|athlon-fx)
                                               echo -xarch=sse2a          ;;
@@ -2773,7 +2773,7 @@ elif enabled x86; then
             disable cmov
         ;;
         # targets that do support conditional mov (cmov)
-        i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|amdfam10|barcelona|atom)
+        i686|pentiumpro|pentium[23]|pentium-m|athlon|athlon-tbird|athlon-4|athlon-[mx]p|athlon64*|k8*|opteron*|athlon-fx|core2|amdfam10|barcelona|atom|bdver*)
             cpuflags="-march=$cpu"
             enable cmov
             enable fast_cmov
diff --git a/libavcodec/mss1.c b/libavcodec/mss1.c
index d622e2ca61..c90485b512 100644
--- a/libavcodec/mss1.c
+++ b/libavcodec/mss1.c
@@ -30,7 +30,7 @@
 typedef struct MSS1Context {
     MSS12Context   ctx;
     AVFrame        pic;
-    SliceContext   sc[2];
+    SliceContext   sc;
 } MSS1Context;
 
 static void arith_normalise(ArithCoder *c)
@@ -89,7 +89,7 @@ static int arith_get_number(ArithCoder *c, int mod_val)
     return val;
 }
 
-static int arith_get_prob(ArithCoder *c, int *probs)
+static int arith_get_prob(ArithCoder *c, int16_t *probs)
 {
     int range = c->high - c->low + 1;
     int val   = ((c->value - c->low + 1) * probs[0] - 1) / range;
@@ -162,7 +162,8 @@ static int mss1_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
     c->pal_stride = -ctx->pic.linesize[0];
     c->keyframe   = !arith_get_bit(&acoder);
     if (c->keyframe) {
-        ff_mss12_codec_reset(c);
+        c->corrupted = 0;
+        ff_mss12_slicecontext_reset(&ctx->sc);
         pal_changed        = decode_pal(c, &acoder);
         ctx->pic.key_frame = 1;
         ctx->pic.pict_type = AV_PICTURE_TYPE_I;
@@ -172,7 +173,7 @@ static int mss1_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
         ctx->pic.key_frame = 0;
         ctx->pic.pict_type = AV_PICTURE_TYPE_P;
     }
-    c->corrupted = ff_mss12_decode_rect(&c->sc[0], &acoder, 0, 0,
+    c->corrupted = ff_mss12_decode_rect(&ctx->sc, &acoder, 0, 0,
                                         avctx->width, avctx->height);
     if (c->corrupted)
         return AVERROR_INVALIDDATA;
@@ -194,7 +195,7 @@ static av_cold int mss1_decode_init(AVCodecContext *avctx)
     c->ctx.avctx       = avctx;
     avctx->coded_frame = &c->pic;
 
-    ret = ff_mss12_decode_init(&c->ctx, 0);
+    ret = ff_mss12_decode_init(&c->ctx, 0, &c->sc, NULL);
 
     avctx->pix_fmt = PIX_FMT_PAL8;
 
diff --git a/libavcodec/mss12.c b/libavcodec/mss12.c
index 9283470884..b8df225822 100644
--- a/libavcodec/mss12.c
+++ b/libavcodec/mss12.c
@@ -61,13 +61,9 @@ static void model_reset(Model *m)
         m->weights[i]  = 1;
         m->cum_prob[i] = m->num_syms - i;
     }
-    m->weights[0]           = -1;
-    m->idx2sym[0]           = -1;
-    m->sym2idx[m->num_syms] = -1;
-    for (i = 0; i < m->num_syms; i++) {
-        m->sym2idx[i]     = i + 1;
+    m->weights[0] = 0;
+    for (i = 0; i < m->num_syms; i++)
         m->idx2sym[i + 1] = i;
-    }
 }
 
 static av_cold void model_init(Model *m, int num_syms, int thr_weight)
@@ -75,7 +71,6 @@ static av_cold void model_init(Model *m, int num_syms, int thr_weight)
     m->num_syms   = num_syms;
     m->thr_weight = thr_weight;
     m->threshold  = num_syms * thr_weight;
-    model_reset(m);
 }
 
 static void model_rescale_weights(Model *m)
@@ -109,8 +104,6 @@ void ff_mss12_model_update(Model *m, int val)
 
             m->idx2sym[val]  = sym2;
             m->idx2sym[i]    = sym1;
-            m->sym2idx[sym1] = i;
-            m->sym2idx[sym2] = val;
 
             val = i;
         }
@@ -123,7 +116,7 @@ void ff_mss12_model_update(Model *m, int val)
 
 static void pixctx_reset(PixContext *ctx)
 {
-    int i, j, k;
+    int i, j;
 
     if (!ctx->special_initial_cache)
         for (i = 0; i < ctx->cache_size; i++)
@@ -137,16 +130,15 @@ static void pixctx_reset(PixContext *ctx)
     model_reset(&ctx->cache_model);
     model_reset(&ctx->full_model);
 
-    for (i = 0; i < 4; i++)
-        for (j = 0; j < sec_order_sizes[i]; j++)
-            for (k = 0; k < 4; k++)
-                model_reset(&ctx->sec_models[i][j][k]);
+    for (i = 0; i < 15; i++)
+        for (j = 0; j < 4; j++)
+            model_reset(&ctx->sec_models[i][j]);
 }
 
 static av_cold void pixctx_init(PixContext *ctx, int cache_size,
                                 int full_model_syms, int special_initial_cache)
 {
-    int i, j, k;
+    int i, j, k, idx;
 
     ctx->cache_size            = cache_size + 4;
     ctx->num_syms              = cache_size;
@@ -155,57 +147,36 @@ static av_cold void pixctx_init(PixContext *ctx, int cache_size,
     model_init(&ctx->cache_model, ctx->num_syms + 1, THRESH_LOW);
     model_init(&ctx->full_model, full_model_syms, THRESH_HIGH);
 
-    for (i = 0; i < 4; i++)
-        for (j = 0; j < sec_order_sizes[i]; j++)
+    for (i = 0, idx = 0; i < 4; i++)
+        for (j = 0; j < sec_order_sizes[i]; j++, idx++)
             for (k = 0; k < 4; k++)
-                model_init(&ctx->sec_models[i][j][k], 2 + i,
+                model_init(&ctx->sec_models[idx][k], 2 + i,
                            i ? THRESH_LOW : THRESH_ADAPTIVE);
 }
 
-static int decode_top_left_pixel(ArithCoder *acoder, PixContext *pctx)
-{
-    int i, val, pix;
-
-    val = acoder->get_model_sym(acoder, &pctx->cache_model);
-    if (val < pctx->num_syms) {
-        pix = pctx->cache[val];
-    } else {
-        pix = acoder->get_model_sym(acoder, &pctx->full_model);
-        for (i = 0; i < pctx->cache_size - 1; i++)
-            if (pctx->cache[i] == pix)
-                break;
-        val = i;
-    }
-    if (val) {
-        for (i = val; i > 0; i--)
-            pctx->cache[i] = pctx->cache[i - 1];
-        pctx->cache[0] = pix;
-    }
-
-    return pix;
-}
-
-static int decode_pixel(ArithCoder *acoder, PixContext *pctx,
-                        uint8_t *ngb, int num_ngb)
+static av_always_inline int decode_pixel(ArithCoder *acoder, PixContext *pctx,
+                                         uint8_t *ngb, int num_ngb, int any_ngb)
 {
     int i, val, pix;
 
     val = acoder->get_model_sym(acoder, &pctx->cache_model);
     if (val < pctx->num_syms) {
-        int idx, j;
-
-        idx = 0;
-        for (i = 0; i < pctx->cache_size; i++) {
-            for (j = 0; j < num_ngb; j++)
-                if (pctx->cache[i] == ngb[j])
-                    break;
-            if (j == num_ngb) {
-                if (idx == val)
-                    break;
-                idx++;
+        if (any_ngb) {
+            int idx, j;
+
+            idx = 0;
+            for (i = 0; i < pctx->cache_size; i++) {
+                for (j = 0; j < num_ngb; j++)
+                    if (pctx->cache[i] == ngb[j])
+                        break;
+                if (j == num_ngb) {
+                    if (idx == val)
+                        break;
+                    idx++;
+                }
             }
+            val = FFMIN(i, pctx->cache_size - 1);
         }
-        val = FFMIN(i, pctx->cache_size - 1);
         pix = pctx->cache[val];
     } else {
         pix = acoder->get_model_sym(acoder, &pctx->full_model);
@@ -268,50 +239,52 @@ static int decode_pixel_in_context(ArithCoder *acoder, PixContext *pctx,
 
     switch (nlen) {
     case 1:
-    case 4:
         layer = 0;
         break;
     case 2:
         if (neighbours[TOP] == neighbours[TOP_LEFT]) {
             if (neighbours[TOP_RIGHT] == neighbours[TOP_LEFT])
-                layer = 3;
+                layer = 1;
             else if (neighbours[LEFT] == neighbours[TOP_LEFT])
                 layer = 2;
             else
-                layer = 4;
+                layer = 3;
         } else if (neighbours[TOP_RIGHT] == neighbours[TOP_LEFT]) {
             if (neighbours[LEFT] == neighbours[TOP_LEFT])
-                layer = 1;
+                layer = 4;
             else
                 layer = 5;
         } else if (neighbours[LEFT] == neighbours[TOP_LEFT]) {
             layer = 6;
         } else {
-            layer = 0;
+            layer = 7;
         }
         break;
     case 3:
         if (neighbours[TOP] == neighbours[TOP_LEFT])
-            layer = 0;
+            layer = 8;
         else if (neighbours[TOP_RIGHT] == neighbours[TOP_LEFT])
-            layer = 1;
+            layer = 9;
         else if (neighbours[LEFT] == neighbours[TOP_LEFT])
-            layer = 2;
+            layer = 10;
         else if (neighbours[TOP_RIGHT] == neighbours[TOP])
-            layer = 3;
+            layer = 11;
         else if (neighbours[TOP] == neighbours[LEFT])
-            layer = 4;
+            layer = 12;
         else
-            layer = 5;
+            layer = 13;
+        break;
+    case 4:
+        layer = 14;
         break;
     }
 
     pix = acoder->get_model_sym(acoder,
-                                &pctx->sec_models[nlen - 1][layer][sub]);
+                                &pctx->sec_models[layer][sub]);
     if (pix < nlen)
         return ref_pix[pix];
     else
-        return decode_pixel(acoder, pctx, ref_pix, nlen);
+        return decode_pixel(acoder, pctx, ref_pix, nlen, 1);
 }
 
 static int decode_region(ArithCoder *acoder, uint8_t *dst, uint8_t *rgb_pic,
@@ -326,7 +299,7 @@ static int decode_region(ArithCoder *acoder, uint8_t *dst, uint8_t *rgb_pic,
     for (j = 0; j < height; j++) {
         for (i = 0; i < width; i++) {
             if (!i && !j)
-                p = decode_top_left_pixel(acoder, pctx);
+                p = decode_pixel(acoder, pctx, NULL, 0, 0);
             else
                 p = decode_pixel_in_context(acoder, pctx, dst + i, stride,
                                             i, j, width - i - 1);
@@ -418,7 +391,7 @@ static int decode_region_masked(MSS12Context const *c, ArithCoder *acoder,
                     return -1;
             } else if (mask[i] != 0x80) {
                 if (!i && !j)
-                    p = decode_top_left_pixel(acoder, pctx);
+                    p = decode_pixel(acoder, pctx, NULL, 0, 0);
                 else
                     p = decode_pixel_in_context(acoder, pctx, dst + i, stride,
                                                 i, j, width - i - 1);
@@ -435,39 +408,30 @@ static int decode_region_masked(MSS12Context const *c, ArithCoder *acoder,
     return 0;
 }
 
-static av_cold void codec_init(MSS12Context *c, int version)
+static av_cold void slicecontext_init(SliceContext *sc,
+                                      int version, int full_model_syms)
 {
-    int i;
-    for (i = 0; i < (c->slice_split ? 2 : 1); i++) {
-        c->sc[i].c = c;
-        model_init(&c->sc[i].intra_region, 2, THRESH_ADAPTIVE);
-        model_init(&c->sc[i].inter_region, 2, THRESH_ADAPTIVE);
-        model_init(&c->sc[i].split_mode,   3, THRESH_HIGH);
-        model_init(&c->sc[i].edge_mode,    2, THRESH_HIGH);
-        model_init(&c->sc[i].pivot,        3, THRESH_LOW);
-
-        pixctx_init(&c->sc[i].intra_pix_ctx, 8, c->full_model_syms, 0);
-
-        pixctx_init(&c->sc[i].inter_pix_ctx, version ? 3 : 2,
-                    c->full_model_syms, version ? 1 : 0);
-    }
-    c->corrupted = 1;
+    model_init(&sc->intra_region, 2, THRESH_ADAPTIVE);
+    model_init(&sc->inter_region, 2, THRESH_ADAPTIVE);
+    model_init(&sc->split_mode,   3, THRESH_HIGH);
+    model_init(&sc->edge_mode,    2, THRESH_HIGH);
+    model_init(&sc->pivot,        3, THRESH_LOW);
+
+    pixctx_init(&sc->intra_pix_ctx, 8, full_model_syms, 0);
+
+    pixctx_init(&sc->inter_pix_ctx, version ? 3 : 2,
+                full_model_syms, version ? 1 : 0);
 }
 
-void ff_mss12_codec_reset(MSS12Context *c)
+void ff_mss12_slicecontext_reset(SliceContext *sc)
 {
-    int i;
-    for (i = 0; i < (c->slice_split ? 2 : 1); i++) {
-        model_reset(&c->sc[i].intra_region);
-        model_reset(&c->sc[i].inter_region);
-        model_reset(&c->sc[i].split_mode);
-        model_reset(&c->sc[i].edge_mode);
-        model_reset(&c->sc[i].pivot);
-        pixctx_reset(&c->sc[i].intra_pix_ctx);
-        pixctx_reset(&c->sc[i].inter_pix_ctx);
-    }
-
-    c->corrupted = 0;
+    model_reset(&sc->intra_region);
+    model_reset(&sc->inter_region);
+    model_reset(&sc->split_mode);
+    model_reset(&sc->edge_mode);
+    model_reset(&sc->pivot);
+    pixctx_reset(&sc->intra_pix_ctx);
+    pixctx_reset(&sc->inter_pix_ctx);
 }
 
 static int decode_pivot(SliceContext *sc, ArithCoder *acoder, int base)
@@ -505,7 +469,7 @@ static int decode_region_intra(SliceContext *sc, ArithCoder *acoder,
         uint8_t *dst     = c->pal_pic + x     + y * stride;
         uint8_t *rgb_dst = c->rgb_pic + x * 3 + y * rgb_stride;
 
-        pix     = decode_top_left_pixel(acoder, &sc->intra_pix_ctx);
+        pix     = decode_pixel(acoder, &sc->intra_pix_ctx, NULL, 0, 0);
         rgb_pix = c->pal[pix];
         for (i = 0; i < height; i++, dst += stride, rgb_dst += rgb_stride) {
             memset(dst, pix, width);
@@ -531,7 +495,7 @@ static int decode_region_inter(SliceContext *sc, ArithCoder *acoder,
     mode = acoder->get_model_sym(acoder, &sc->inter_region);
 
     if (!mode) {
-        mode = decode_top_left_pixel(acoder, &sc->inter_pix_ctx);
+        mode = decode_pixel(acoder, &sc->inter_pix_ctx, NULL, 0, 0);
 
         if (c->avctx->err_recognition & AV_EF_EXPLODE &&
             ( c->rgb_pic && mode != 0x01 && mode != 0x02 && mode != 0x04 ||
@@ -595,7 +559,8 @@ int ff_mss12_decode_rect(SliceContext *sc, ArithCoder *acoder,
     return 0;
 }
 
-av_cold int ff_mss12_decode_init(MSS12Context *c, int version)
+av_cold int ff_mss12_decode_init(MSS12Context *c, int version,
+                                 SliceContext* sc1, SliceContext *sc2)
 {
     AVCodecContext *avctx = c->avctx;
     int i;
@@ -690,7 +655,13 @@ av_cold int ff_mss12_decode_init(MSS12Context *c, int version)
         return AVERROR(ENOMEM);
     }
 
-    codec_init(c, version);
+    sc1->c = c;
+    slicecontext_init(sc1, version, c->full_model_syms);
+    if (c->slice_split) {
+        sc2->c = c;
+        slicecontext_init(sc2, version, c->full_model_syms);
+    }
+    c->corrupted = 1;
 
     return 0;
 }
diff --git a/libavcodec/mss12.h b/libavcodec/mss12.h
index 9068651e06..ba80030ee3 100644
--- a/libavcodec/mss12.h
+++ b/libavcodec/mss12.h
@@ -38,10 +38,9 @@
 #define THRESH_HIGH      50
 
 typedef struct Model {
-    int cum_prob[MODEL_MAX_SYMS + 1];
-    int weights[MODEL_MAX_SYMS + 1];
-    int idx2sym[MODEL_MAX_SYMS + 1];
-    int sym2idx[MODEL_MAX_SYMS + 1];
+    int16_t cum_prob[MODEL_MAX_SYMS + 1];
+    int16_t weights[MODEL_MAX_SYMS + 1];
+    uint8_t idx2sym[MODEL_MAX_SYMS + 1];
     int num_syms;
     int thr_weight, threshold;
 } Model;
@@ -60,7 +59,7 @@ typedef struct PixContext {
     int cache_size, num_syms;
     uint8_t cache[12];
     Model cache_model, full_model;
-    Model sec_models[4][8][4];
+    Model sec_models[15][4];
     int special_initial_cache;
 } PixContext;
 
@@ -86,21 +85,18 @@ typedef struct MSS12Context {
     int            rgb_stride;
     int            free_colours;
     int            keyframe;
-    Model          intra_region, inter_region;
-    Model          pivot, edge_mode, split_mode;
-    PixContext     intra_pix_ctx, inter_pix_ctx;
     int            mvX, mvY;
     int            corrupted;
     int            slice_split;
     int            full_model_syms;
-    SliceContext   sc[2];
 } MSS12Context;
 
 int ff_mss12_decode_rect(SliceContext *ctx, ArithCoder *acoder,
                          int x, int y, int width, int height);
 void ff_mss12_model_update(Model *m, int val);
-void ff_mss12_codec_reset(MSS12Context *ctx);
-av_cold int ff_mss12_decode_init(MSS12Context *ctx, int version);
+void ff_mss12_slicecontext_reset(SliceContext *sc);
+av_cold int ff_mss12_decode_init(MSS12Context *c, int version,
+                                 SliceContext* sc1, SliceContext *sc2);
 av_cold int ff_mss12_decode_end(MSS12Context *ctx);
 
 #define ARITH_GET_BIT(VERSION)                                          \
diff --git a/libavcodec/mss2.c b/libavcodec/mss2.c
index 886da05540..fc9ebff4d7 100644
--- a/libavcodec/mss2.c
+++ b/libavcodec/mss2.c
@@ -106,7 +106,7 @@ static int arith2_get_number(ArithCoder *c, int n)
     return val;
 }
 
-static int arith2_get_prob(ArithCoder *c, int *probs)
+static int arith2_get_prob(ArithCoder *c, int16_t *probs)
 {
     int range = c->high - c->low + 1, n = *probs;
     int scale = av_log2(range) - av_log2(n);
@@ -671,14 +671,18 @@ static int mss2_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
         buf      += get_bits_count(&gb) >> 3;
         buf_size -= get_bits_count(&gb) >> 3;
     } else {
-        if (keyframe)
-            ff_mss12_codec_reset(c);
+        if (keyframe) {
+            c->corrupted = 0;
+            ff_mss12_slicecontext_reset(&ctx->sc[0]);
+            if (c->slice_split)
+                ff_mss12_slicecontext_reset(&ctx->sc[1]);
+        }
         else if (c->corrupted)
             return AVERROR_INVALIDDATA;
         bytestream2_init(&gB, buf, buf_size + ARITH2_PADDING);
         arith2_init(&acoder, &gB);
         c->keyframe = keyframe;
-        if (c->corrupted = ff_mss12_decode_rect(&c->sc[0], &acoder, 0, 0,
+        if (c->corrupted = ff_mss12_decode_rect(&ctx->sc[0], &acoder, 0, 0,
                                                 avctx->width,
                                                 ctx->split_position))
             return AVERROR_INVALIDDATA;
@@ -690,7 +694,7 @@ static int mss2_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
                 return AVERROR_INVALIDDATA;
             bytestream2_init(&gB, buf, buf_size + ARITH2_PADDING);
             arith2_init(&acoder, &gB);
-            if (c->corrupted = ff_mss12_decode_rect(&c->sc[1], &acoder, 0,
+            if (c->corrupted = ff_mss12_decode_rect(&ctx->sc[1], &acoder, 0,
                                                     ctx->split_position,
                                                     avctx->width,
                                                     avctx->height - ctx->split_position))
@@ -830,7 +834,7 @@ static av_cold int mss2_decode_init(AVCodecContext *avctx)
     int ret;
     c->avctx = avctx;
     avctx->coded_frame = &ctx->pic;
-    if (ret = ff_mss12_decode_init(c, 1))
+    if (ret = ff_mss12_decode_init(c, 1, &ctx->sc[0], &ctx->sc[1]))
         return ret;
     c->pal_stride   = c->mask_stride;
     c->pal_pic      = av_malloc(c->pal_stride * avctx->height);
diff --git a/libavcodec/x86/h264dsp_init.c b/libavcodec/x86/h264dsp_init.c
index 472f252ba9..6c83d8ce58 100644
--- a/libavcodec/x86/h264dsp_init.c
+++ b/libavcodec/x86/h264dsp_init.c
@@ -39,11 +39,9 @@ IDCT_ADD_FUNC(8_dc, 10, sse2)
 IDCT_ADD_FUNC(8, 8, mmx)
 IDCT_ADD_FUNC(8, 8, sse2)
 IDCT_ADD_FUNC(8, 10, sse2)
-#if HAVE_AVX_EXTERNAL
 IDCT_ADD_FUNC(, 10, avx)
 IDCT_ADD_FUNC(8_dc, 10, avx)
 IDCT_ADD_FUNC(8, 10, avx)
-#endif
 
 
 #define IDCT_ADD_REP_FUNC(NUM, REP, DEPTH, OPT)                         \
@@ -64,10 +62,8 @@ IDCT_ADD_REP_FUNC(, 16intra, 8, mmx)
 IDCT_ADD_REP_FUNC(, 16intra, 8, mmx2)
 IDCT_ADD_REP_FUNC(, 16intra, 8, sse2)
 IDCT_ADD_REP_FUNC(, 16intra, 10, sse2)
-#if HAVE_AVX_EXTERNAL
 IDCT_ADD_REP_FUNC(, 16, 10, avx)
 IDCT_ADD_REP_FUNC(, 16intra, 10, avx)
-#endif
 
 
 #define IDCT_ADD_REP_FUNC2(NUM, REP, DEPTH, OPT)                      \
@@ -79,9 +75,7 @@ IDCT_ADD_REP_FUNC2(, 8, 8, mmx)
 IDCT_ADD_REP_FUNC2(, 8, 8, mmx2)
 IDCT_ADD_REP_FUNC2(, 8, 8, sse2)
 IDCT_ADD_REP_FUNC2(, 8, 10, sse2)
-#if HAVE_AVX_EXTERNAL
 IDCT_ADD_REP_FUNC2(, 8, 10, avx)
-#endif
 
 void ff_h264_luma_dc_dequant_idct_mmx(DCTELEM *output, DCTELEM *input, int qmul);
 void ff_h264_luma_dc_dequant_idct_sse2(DCTELEM *output, DCTELEM *input, int qmul);
diff --git a/libavformat/aviobuf.c b/libavformat/aviobuf.c
index f1ac24e844..282a62e2b7 100644
--- a/libavformat/aviobuf.c
+++ b/libavformat/aviobuf.c
@@ -796,7 +796,7 @@ int avio_close(AVIOContext *s)
 
     avio_flush(s);
     h = s->opaque;
-    av_free(s->buffer);
+    av_freep(&s->buffer);
     if (!s->write_flag)
         av_log(s, AV_LOG_DEBUG, "Statistics: %"PRId64" bytes read, %d seeks\n", s->bytes_read, s->seek_count);
     av_free(s);
diff --git a/libavutil/pixdesc.c b/libavutil/pixdesc.c
index 9e5a89b5c2..d64d300ea7 100644
--- a/libavutil/pixdesc.c
+++ b/libavutil/pixdesc.c
@@ -26,8 +26,10 @@
 
 #include "intreadwrite.h"
 
-void av_read_image_line(uint16_t *dst, const uint8_t *data[4], const int linesize[4],
-                        const AVPixFmtDescriptor *desc, int x, int y, int c, int w,
+void av_read_image_line(uint16_t *dst,
+                        const uint8_t *data[4], const int linesize[4],
+                        const AVPixFmtDescriptor *desc,
+                        int x, int y, int c, int w,
                         int read_pal_component)
 {
     AVComponentDescriptor comp = desc->comp[c];
@@ -53,7 +55,8 @@ void av_read_image_line(uint16_t *dst, const uint8_t *data[4], const int linesiz
             *dst++ = val;
         }
     } else {
-        const uint8_t *p = data[plane] + y * linesize[plane] + x * step + comp.offset_plus1 - 1;
+        const uint8_t *p = data[plane] + y * linesize[plane] +
+                           x * step + comp.offset_plus1 - 1;
         int is_8bit = shift + depth <= 8;
 
         if (is_8bit)
@@ -71,8 +74,10 @@ void av_read_image_line(uint16_t *dst, const uint8_t *data[4], const int linesiz
     }
 }
 
-void av_write_image_line(const uint16_t *src, uint8_t *data[4], const int linesize[4],
-                         const AVPixFmtDescriptor *desc, int x, int y, int c, int w)
+void av_write_image_line(const uint16_t *src,
+                         uint8_t *data[4], const int linesize[4],
+                         const AVPixFmtDescriptor *desc,
+                         int x, int y, int c, int w)
 {
     AVComponentDescriptor comp = desc->comp[c];
     int plane = comp.plane;
@@ -93,7 +98,8 @@ void av_write_image_line(const uint16_t *src, uint8_t *data[4], const int linesi
         }
     } else {
         int shift = comp.shift;
-        uint8_t *p = data[plane] + y * linesize[plane] + x * step + comp.offset_plus1 - 1;
+        uint8_t *p = data[plane] + y * linesize[plane] +
+                     x * step + comp.offset_plus1 - 1;
 
         if (shift + depth <= 8) {
             p += !!(flags & PIX_FMT_BE);
diff --git a/libavutil/x86/cpu.h b/libavutil/x86/cpu.h
new file mode 100644
index 0000000000..76abeb90b1
--- /dev/null
+++ b/libavutil/x86/cpu.h
@@ -0,0 +1,57 @@
+/*
+ * 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
+ */
+
+#ifndef AVUTIL_X86_CPU_H
+#define AVUTIL_X86_CPU_H
+
+#include "config.h"
+#include "libavutil/cpu.h"
+
+#define CPUEXT(flags, suffix, cpuext)                                   \
+    (HAVE_ ## cpuext ## suffix && ((flags) & AV_CPU_FLAG_ ## cpuext))
+
+#define AV_CPU_FLAG_AMD3DNOW    AV_CPU_FLAG_3DNOW
+#define AV_CPU_FLAG_AMD3DNOWEXT AV_CPU_FLAG_3DNOWEXT
+
+#define EXTERNAL_AMD3DNOW(flags)    CPUEXT(flags, _EXTERNAL, AMD3DNOW)
+#define EXTERNAL_AMD3DNOWEXT(flags) CPUEXT(flags, _EXTERNAL, AMD3DNOWEXT)
+#define EXTERNAL_MMX(flags)         CPUEXT(flags, _EXTERNAL, MMX)
+#define EXTERNAL_MMXEXT(flags)      CPUEXT(flags, _EXTERNAL, MMXEXT)
+#define EXTERNAL_SSE(flags)         CPUEXT(flags, _EXTERNAL, SSE)
+#define EXTERNAL_SSE2(flags)        CPUEXT(flags, _EXTERNAL, SSE2)
+#define EXTERNAL_SSE3(flags)        CPUEXT(flags, _EXTERNAL, SSE3)
+#define EXTERNAL_SSSE3(flags)       CPUEXT(flags, _EXTERNAL, SSSE3)
+#define EXTERNAL_SSE4(flags)        CPUEXT(flags, _EXTERNAL, SSE4)
+#define EXTERNAL_SSE42(flags)       CPUEXT(flags, _EXTERNAL, SSE42)
+#define EXTERNAL_AVX(flags)         CPUEXT(flags, _EXTERNAL, AVX)
+#define EXTERNAL_FMA4(flags)        CPUEXT(flags, _EXTERNAL, FMA4)
+
+#define INLINE_AMD3DNOW(flags)      CPUEXT(flags, _INLINE, AMD3DNOW)
+#define INLINE_AMD3DNOWEXT(flags)   CPUEXT(flags, _INLINE, AMD3DNOWEXT)
+#define INLINE_MMX(flags)           CPUEXT(flags, _INLINE, MMX)
+#define INLINE_MMXEXT(flags)        CPUEXT(flags, _INLINE, MMXEXT)
+#define INLINE_SSE(flags)           CPUEXT(flags, _INLINE, SSE)
+#define INLINE_SSE2(flags)          CPUEXT(flags, _INLINE, SSE2)
+#define INLINE_SSE3(flags)          CPUEXT(flags, _INLINE, SSE3)
+#define INLINE_SSSE3(flags)         CPUEXT(flags, _INLINE, SSSE3)
+#define INLINE_SSE4(flags)          CPUEXT(flags, _INLINE, SSE4)
+#define INLINE_SSE42(flags)         CPUEXT(flags, _INLINE, SSE42)
+#define INLINE_AVX(flags)           CPUEXT(flags, _INLINE, AVX)
+#define INLINE_FMA4(flags)          CPUEXT(flags, _INLINE, FMA4)
+
+#endif /* AVUTIL_X86_CPU_H */