Merge remote-tracking branch 'qatar/master'

* qatar/master:
  asf: only set index_read if the index contained entries.
  cabac: add overread protection to BRANCHLESS_GET_CABAC().
  cabac: increment jump locations by one in callers of BRANCHLESS_GET_CABAC().
  cabac: remove unused argument from BRANCHLESS_GET_CABAC_UPDATE().
  cabac: use struct+offset instead of memory operand in BRANCHLESS_GET_CABAC().
  h264: add overread protection to get_cabac_bypass_sign_x86().
  h264: reindent get_cabac_bypass_sign_x86().
  h264: use struct offsets in get_cabac_bypass_sign_x86().
  h264: fix overreads in cabac reader.
  wmall: fix seeking.
  lagarith: fix buffer overreads.
  dvdec: drop unnecessary dv_tablegen.h #include
  build: fix doc generation errors in parallel builds
  Replace memset(0) by zero initializations.
  faandct: Remove FAAN_POSTSCALE define and related code.
  dvenc: print allowed profiles if the video doesn't conform to any of them.
  avcodec_encode_{audio,video}: only reallocate output packet when it has non-zero size.
  FATE: add a test for vp8 with changing frame size.
  fate: add kgv1 fate test.
  oggdec: calculate correct timestamps in Ogg/FLAC

Conflicts:
	libavcodec/4xm.c
	libavcodec/cook.c
	libavcodec/dvdata.c
	libavcodec/dvdsubdec.c
	libavcodec/lagarith.c
	libavcodec/lagarithrac.c
	libavcodec/utils.c
	tests/fate/video.mak

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

39 files changed, 230 insertions, 251 deletions

diff --git a/libavcodec/4xm.c b/libavcodec/4xm.c
index 53ee855..600cf81 100644
--- a/libavcodec/4xm.c
+++ b/libavcodec/4xm.c
@@ -578,7 +578,7 @@ static int decode_i_mb(FourXContext *f)
 static const uint8_t *read_huffman_tables(FourXContext *f,
                                           const uint8_t * const buf, int buf_size)
 {
-    int frequency[512];
+    int frequency[512] = { 0 };
     uint8_t flag[512];
     int up[512];
     uint8_t len_tab[257];
@@ -588,7 +588,6 @@ static const uint8_t *read_huffman_tables(FourXContext *f,
     const uint8_t *ptr_end = buf + buf_size;
     int j;
 
-    memset(frequency, 0, sizeof(frequency));
     memset(up, -1, sizeof(up));
 
     start = *ptr++;
@@ -691,10 +690,9 @@ static int decode_i2_frame(FourXContext *f, const uint8_t *buf, int length)
 
     for (y = 0; y < height; y += 16) {
         for (x = 0; x < width; x += 16) {
-            unsigned int color[4], bits;
+            unsigned int color[4] = { 0 }, bits;
             if (buf_end - buf < 8)
                 return -1;
-            memset(color, 0, sizeof(color));
             // warning following is purely guessed ...
             color[0] = bytestream2_get_le16u(&g3);
             color[1] = bytestream2_get_le16u(&g3);
diff --git a/libavcodec/aaccoder.c b/libavcodec/aaccoder.c
index 8738460..25187b7 100644
--- a/libavcodec/aaccoder.c
+++ b/libavcodec/aaccoder.c
@@ -714,7 +714,7 @@ static void search_for_quantizers_twoloop(AVCodecContext *avctx,
 {
     int start = 0, i, w, w2, g;
     int destbits = avctx->bit_rate * 1024.0 / avctx->sample_rate / avctx->channels;
-    float dists[128], uplims[128];
+    float dists[128] = { 0 }, uplims[128];
     float maxvals[128];
     int fflag, minscaler;
     int its  = 0;
@@ -722,7 +722,6 @@ static void search_for_quantizers_twoloop(AVCodecContext *avctx,
     float minthr = INFINITY;
 
     //XXX: some heuristic to determine initial quantizers will reduce search time
-    memset(dists, 0, sizeof(dists));
     //determine zero bands and upper limits
     for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) {
         for (g = 0;  g < sce->ics.num_swb; g++) {
diff --git a/libavcodec/aacpsy.c b/libavcodec/aacpsy.c
index 396a2d2..77dfec6 100644
--- a/libavcodec/aacpsy.c
+++ b/libavcodec/aacpsy.c
@@ -389,9 +389,8 @@ static av_unused FFPsyWindowInfo psy_3gpp_window(FFPsyContext *ctx,
     AacPsyChannel *pch  = &pctx->ch[channel];
     uint8_t grouping     = 0;
     int next_type        = pch->next_window_seq;
-    FFPsyWindowInfo wi;
+    FFPsyWindowInfo wi  = { { 0 } };
 
-    memset(&wi, 0, sizeof(wi));
     if (la) {
         float s[8], v;
         int switch_to_eight = 0;
@@ -785,9 +784,8 @@ static FFPsyWindowInfo psy_lame_window(FFPsyContext *ctx, const float *audio,
     int uselongblock = 1;
     int attacks[AAC_NUM_BLOCKS_SHORT + 1] = { 0 };
     int i;
-    FFPsyWindowInfo wi;
+    FFPsyWindowInfo wi = { { 0 } };
 
-    memset(&wi, 0, sizeof(wi));
     if (la) {
         float hpfsmpl[AAC_BLOCK_SIZE_LONG];
         float const *pf = hpfsmpl;
diff --git a/libavcodec/ac3dec.c b/libavcodec/ac3dec.c
index 31891b5..6c1fdbe 100644
--- a/libavcodec/ac3dec.c
+++ b/libavcodec/ac3dec.c
@@ -753,9 +753,7 @@ static int decode_audio_block(AC3DecodeContext *s, int blk)
     int downmix_output;
     int cpl_in_use;
     GetBitContext *gbc = &s->gbc;
-    uint8_t bit_alloc_stages[AC3_MAX_CHANNELS];
-
-    memset(bit_alloc_stages, 0, AC3_MAX_CHANNELS);
+    uint8_t bit_alloc_stages[AC3_MAX_CHANNELS] = { 0 };
 
     /* block switch flags */
     different_transforms = 0;
diff --git a/libavcodec/alsdec.c b/libavcodec/alsdec.c
index e61c29e..b98473e 100644
--- a/libavcodec/alsdec.c
+++ b/libavcodec/alsdec.c
@@ -1035,9 +1035,7 @@ static int decode_blocks_ind(ALSDecContext *ctx, unsigned int ra_frame,
                              unsigned int *js_blocks)
 {
     unsigned int b;
-    ALSBlockData bd;
-
-    memset(&bd, 0, sizeof(ALSBlockData));
+    ALSBlockData bd = { 0 };
 
     bd.ra_block         = ra_frame;
     bd.const_block      = ctx->const_block;
@@ -1078,9 +1076,7 @@ static int decode_blocks(ALSDecContext *ctx, unsigned int ra_frame,
     ALSSpecificConfig *sconf = &ctx->sconf;
     unsigned int offset = 0;
     unsigned int b;
-    ALSBlockData bd[2];
-
-    memset(bd, 0, 2 * sizeof(ALSBlockData));
+    ALSBlockData bd[2] = { { 0 } };
 
     bd[0].ra_block         = ra_frame;
     bd[0].const_block      = ctx->const_block;
@@ -1346,7 +1342,7 @@ static int read_frame_data(ALSDecContext *ctx, unsigned int ra_frame)
                     sizeof(*ctx->raw_samples[c]) * sconf->max_order);
         }
     } else { // multi-channel coding
-        ALSBlockData   bd;
+        ALSBlockData   bd = { 0 };
         int            b;
         int            *reverted_channels = ctx->reverted_channels;
         unsigned int   offset             = 0;
@@ -1357,7 +1353,6 @@ static int read_frame_data(ALSDecContext *ctx, unsigned int ra_frame)
                 return -1;
             }
 
-        memset(&bd,               0, sizeof(ALSBlockData));
         memset(reverted_channels, 0, sizeof(*reverted_channels) * avctx->channels);
 
         bd.ra_block         = ra_frame;
diff --git a/libavcodec/bink.c b/libavcodec/bink.c
index 4ca96e5..694a734 100644
--- a/libavcodec/bink.c
+++ b/libavcodec/bink.c
@@ -233,7 +233,7 @@ static void merge(GetBitContext *gb, uint8_t *dst, uint8_t *src, int size)
  */
 static void read_tree(GetBitContext *gb, Tree *tree)
 {
-    uint8_t tmp1[16], tmp2[16], *in = tmp1, *out = tmp2;
+    uint8_t tmp1[16] = { 0 }, tmp2[16], *in = tmp1, *out = tmp2;
     int i, t, len;
 
     tree->vlc_num = get_bits(gb, 4);
@@ -244,7 +244,6 @@ static void read_tree(GetBitContext *gb, Tree *tree)
     }
     if (get_bits1(gb)) {
         len = get_bits(gb, 3);
-        memset(tmp1, 0, sizeof(tmp1));
         for (i = 0; i <= len; i++) {
             tree->syms[i] = get_bits(gb, 4);
             tmp1[tree->syms[i]] = 1;
diff --git a/libavcodec/cabac_functions.h b/libavcodec/cabac_functions.h
index 226edfa..90af15c 100644
--- a/libavcodec/cabac_functions.h
+++ b/libavcodec/cabac_functions.h
@@ -47,7 +47,7 @@ static void refill(CABACContext *c){
         c->low+= c->bytestream[0]<<1;
 #endif
     c->low -= CABAC_MASK;
-    c->bytestream+= CABAC_BITS/8;
+    c->bytestream += CABAC_BITS / 8;
 }
 
 static inline void renorm_cabac_decoder_once(CABACContext *c){
@@ -74,7 +74,7 @@ static void refill2(CABACContext *c){
 #endif
 
     c->low += x<<i;
-    c->bytestream+= CABAC_BITS/8;
+    c->bytestream += CABAC_BITS/8;
 }
 
 static av_always_inline int get_cabac_inline(CABACContext *c, uint8_t * const state){
diff --git a/libavcodec/cook.c b/libavcodec/cook.c
index 31b0f1f..cde2752 100644
--- a/libavcodec/cook.c
+++ b/libavcodec/cook.c
@@ -411,10 +411,10 @@ static void categorize(COOKContext *q, COOKSubpacket *p, const int *quant_index_
                        int *category, int *category_index)
 {
     int exp_idx, bias, tmpbias1, tmpbias2, bits_left, num_bits, index, v, i, j;
-    int exp_index2[102];
-    int exp_index1[102];
+    int exp_index2[102] = { 0 };
+    int exp_index1[102] = { 0 };
 
-    int tmp_categorize_array[128 * 2];
+    int tmp_categorize_array[128 * 2] = { 0 };
     int tmp_categorize_array1_idx = p->numvector_size;
     int tmp_categorize_array2_idx = p->numvector_size;
 
@@ -426,10 +426,6 @@ static void categorize(COOKContext *q, COOKSubpacket *p, const int *quant_index_
         //av_log(q->avctx, AV_LOG_ERROR, "bits_left = %d\n",bits_left);
     }
 
-    memset(&exp_index1,           0, sizeof(exp_index1));
-    memset(&exp_index2,           0, sizeof(exp_index2));
-    memset(&tmp_categorize_array, 0, sizeof(tmp_categorize_array));
-
     bias = -32;
 
     /* Estimate bias. */
@@ -649,14 +645,11 @@ static void decode_vectors(COOKContext *q, COOKSubpacket *p, int *category,
  */
 static int mono_decode(COOKContext *q, COOKSubpacket *p, float *mlt_buffer)
 {
-    int category_index[128];
+    int category_index[128] = { 0 };
+    int category[128]       = { 0 };
     int quant_index_table[102];
-    int category[128];
     int res, i;
 
-    memset(&category,       0, sizeof(category));
-    memset(&category_index, 0, sizeof(category_index));
-
     if ((res = decode_envelope(q, p, quant_index_table)) < 0)
         return res;
     q->num_vectors = get_bits(&q->gb, p->log2_numvector_size);
@@ -829,13 +822,12 @@ static int joint_decode(COOKContext *q, COOKSubpacket *p, float *mlt_buffer1,
                         float *mlt_buffer2)
 {
     int i, j, res;
-    int decouple_tab[SUBBAND_SIZE];
+    int decouple_tab[SUBBAND_SIZE] = { 0 };
     float *decode_buffer = q->decode_buffer_0;
     int idx, cpl_tmp;
     float f1, f2;
     const float *cplscale;
 
-    memset(decouple_tab, 0, sizeof(decouple_tab));
     memset(decode_buffer, 0, sizeof(q->decode_buffer_0));
 
     /* Make sure the buffers are zeroed out. */
diff --git a/libavcodec/dct-test.c b/libavcodec/dct-test.c
index 3a6ab96..eb2fdc6 100644
--- a/libavcodec/dct-test.c
+++ b/libavcodec/dct-test.c
@@ -74,17 +74,11 @@ struct algo {
     int nonspec;
 };
 
-#ifndef FAAN_POSTSCALE
-#define FAAN_SCALE SCALE_PERM
-#else
-#define FAAN_SCALE NO_PERM
-#endif
-
 static int cpu_flags;
 
 static const struct algo fdct_tab[] = {
     { "REF-DBL",        ff_ref_fdct,           NO_PERM    },
-    { "FAAN",           ff_faandct,            FAAN_SCALE },
+    { "FAAN",           ff_faandct,            NO_PERM    },
     { "IJG-AAN-INT",    ff_fdct_ifast,         SCALE_PERM },
     { "IJG-LLM-INT",    ff_jpeg_fdct_islow_8,  NO_PERM    },
 
diff --git a/libavcodec/dv.c b/libavcodec/dv.c
index 805ebe3..d0de545 100644
--- a/libavcodec/dv.c
+++ b/libavcodec/dv.c
@@ -323,9 +323,11 @@ av_cold int ff_dvvideo_init(AVCodecContext *avctx)
 static av_cold int dvvideo_init_encoder(AVCodecContext *avctx)
 {
     if (!avpriv_dv_codec_profile(avctx)) {
-        av_log(avctx, AV_LOG_ERROR, "Found no DV profile for %ix%i %s video\n",
+        av_log(avctx, AV_LOG_ERROR, "Found no DV profile for %ix%i %s video. "
+               "Valid DV profiles are:\n",
                avctx->width, avctx->height, av_get_pix_fmt_name(avctx->pix_fmt));
-        return -1;
+        ff_dv_print_profiles(avctx, AV_LOG_ERROR);
+        return AVERROR(EINVAL);
     }
 
     return ff_dvvideo_init(avctx);
diff --git a/libavcodec/dvdata.c b/libavcodec/dvdata.c
index 3dc3ae6..6a29a59 100644
--- a/libavcodec/dvdata.c
+++ b/libavcodec/dvdata.c
@@ -26,6 +26,7 @@
 
 #include "libavutil/rational.h"
 #include "libavutil/intreadwrite.h"
+#include "libavutil/pixdesc.h"
 #include "avcodec.h"
 #include "dvdata.h"
 
@@ -345,3 +346,14 @@ const DVprofile* avpriv_dv_codec_profile(AVCodecContext* codec)
 
     return NULL;
 }
+
+void ff_dv_print_profiles(void *logctx, int loglevel)
+{
+    int i;
+    for (i = 0; i < FF_ARRAY_ELEMS(dv_profiles); i++) {
+        const DVprofile *p = &dv_profiles[i];
+        av_log(logctx, loglevel, "Frame size: %dx%d; pixel format: %s, "
+               "framerate: %d/%d\n", p->width, p->height, av_get_pix_fmt_name(p->pix_fmt),
+               p->time_base.den, p->time_base.num);
+    }
+}
diff --git a/libavcodec/dvdata.h b/libavcodec/dvdata.h
index e3ce98a..9a6ac89 100644
--- a/libavcodec/dvdata.h
+++ b/libavcodec/dvdata.h
@@ -156,4 +156,9 @@ static inline void dv_calculate_mb_xy(DVVideoContext *s, DVwork_chunk *work_chun
      }
 }
 
+/**
+ *  Print all allowed DV profiles into logctx at specified logging level.
+ */
+void ff_dv_print_profiles(void *logctx, int loglevel);
+
 #endif /* AVCODEC_DVDATA_H */
diff --git a/libavcodec/dvdec.c b/libavcodec/dvdec.c
index 8e0ee65..bff3a10 100644
--- a/libavcodec/dvdec.c
+++ b/libavcodec/dvdec.c
@@ -43,7 +43,6 @@
 #include "simple_idct.h"
 #include "dvdata.h"
 #include "dvquant.h"
-#include "dv_tablegen.h"
 
 typedef struct BlockInfo {
     const uint32_t *factor_table;
diff --git a/libavcodec/dvdsubdec.c b/libavcodec/dvdsubdec.c
index f4b5439..afc485b 100644
--- a/libavcodec/dvdsubdec.c
+++ b/libavcodec/dvdsubdec.c
@@ -135,7 +135,7 @@ static void guess_palette(uint32_t *rgba_palette,
         {0x00, 0x80, 0xff},
         {0x00, 0x55, 0xaa, 0xff},
     };
-    uint8_t color_used[16];
+    uint8_t color_used[16] = { 0 };
     int nb_opaque_colors, i, level, j, r, g, b;
     uint8_t *colormap = ctx->colormap, *alpha = ctx->alpha;
 
@@ -149,7 +149,6 @@ static void guess_palette(uint32_t *rgba_palette,
     for(i = 0; i < 4; i++)
         rgba_palette[i] = 0;
 
-    memset(color_used, 0, 16);
     nb_opaque_colors = 0;
     for(i = 0; i < 4; i++) {
         if (alpha[i] != 0 && !color_used[colormap[i]]) {
@@ -397,14 +396,13 @@ static int is_transp(const uint8_t *buf, int pitch, int n,
 /* return 0 if empty rectangle, 1 if non empty */
 static int find_smallest_bounding_rectangle(AVSubtitle *s)
 {
-    uint8_t transp_color[256];
+    uint8_t transp_color[256] = { 0 };
     int y1, y2, x1, x2, y, w, h, i;
     uint8_t *bitmap;
 
     if (s->num_rects == 0 || s->rects == NULL || s->rects[0]->w <= 0 || s->rects[0]->h <= 0)
         return 0;
 
-    memset(transp_color, 0, 256);
     for(i = 0; i < s->rects[0]->nb_colors; i++) {
         if ((((uint32_t*)s->rects[0]->pict.data[1])[i] >> 24) == 0)
             transp_color[i] = 1;
diff --git a/libavcodec/dxva2.c b/libavcodec/dxva2.c
index 9b94b58..d866071 100644
--- a/libavcodec/dxva2.c
+++ b/libavcodec/dxva2.c
@@ -86,7 +86,7 @@ int ff_dxva2_common_end_frame(AVCodecContext *avctx, MpegEncContext *s,
     struct dxva_context *ctx = avctx->hwaccel_context;
     unsigned               buffer_count = 0;
     DXVA2_DecodeBufferDesc buffer[4];
-    DXVA2_DecodeExecuteParams exec;
+    DXVA2_DecodeExecuteParams exec = { 0 };
     int      result;
 
     if (FAILED(IDirectXVideoDecoder_BeginFrame(ctx->decoder,
@@ -132,7 +132,6 @@ int ff_dxva2_common_end_frame(AVCodecContext *avctx, MpegEncContext *s,
 
     assert(buffer_count == 1 + (qm_size > 0) + 2);
 
-    memset(&exec, 0, sizeof(exec));
     exec.NumCompBuffers      = buffer_count;
     exec.pCompressedBuffers  = buffer;
     exec.pExtensionData      = NULL;
diff --git a/libavcodec/faandct.c b/libavcodec/faandct.c
index a986f65..eaf4b65 100644
--- a/libavcodec/faandct.c
+++ b/libavcodec/faandct.c
@@ -29,11 +29,6 @@
 #include "faandct.h"
 
 #define FLOAT float
-#ifdef FAAN_POSTSCALE
-#    define SCALE(x) postscale[x]
-#else
-#    define SCALE(x) 1
-#endif
 
 //numbers generated by simple c code (not as accurate as they could be)
 /*
@@ -150,13 +145,13 @@ void ff_faandct(DCTELEM * data)
         tmp11= tmp1 + tmp2;
         tmp12= tmp1 - tmp2;
 
-        data[8*0 + i]= lrintf(SCALE(8*0 + i) * (tmp10 + tmp11));
-        data[8*4 + i]= lrintf(SCALE(8*4 + i) * (tmp10 - tmp11));
+        data[8*0 + i]= lrintf(postscale[8*0 + i] * (tmp10 + tmp11));
+        data[8*4 + i]= lrintf(postscale[8*4 + i] * (tmp10 - tmp11));
 
         tmp12 += tmp13;
         tmp12 *= A1;
-        data[8*2 + i]= lrintf(SCALE(8*2 + i) * (tmp13 + tmp12));
-        data[8*6 + i]= lrintf(SCALE(8*6 + i) * (tmp13 - tmp12));
+        data[8*2 + i]= lrintf(postscale[8*2 + i] * (tmp13 + tmp12));
+        data[8*6 + i]= lrintf(postscale[8*6 + i] * (tmp13 - tmp12));
 
         tmp4 += tmp5;
         tmp5 += tmp6;
@@ -175,10 +170,10 @@ void ff_faandct(DCTELEM * data)
         z11= tmp7 + tmp5;
         z13= tmp7 - tmp5;
 
-        data[8*5 + i]= lrintf(SCALE(8*5 + i) * (z13 + z2));
-        data[8*3 + i]= lrintf(SCALE(8*3 + i) * (z13 - z2));
-        data[8*1 + i]= lrintf(SCALE(8*1 + i) * (z11 + z4));
-        data[8*7 + i]= lrintf(SCALE(8*7 + i) * (z11 - z4));
+        data[8*5 + i]= lrintf(postscale[8*5 + i] * (z13 + z2));
+        data[8*3 + i]= lrintf(postscale[8*3 + i] * (z13 - z2));
+        data[8*1 + i]= lrintf(postscale[8*1 + i] * (z11 + z4));
+        data[8*7 + i]= lrintf(postscale[8*7 + i] * (z11 - z4));
     }
 }
 
@@ -208,25 +203,25 @@ void ff_faandct248(DCTELEM * data)
         tmp12 = tmp1 - tmp2;
         tmp13 = tmp0 - tmp3;
 
-        data[8*0 + i] = lrintf(SCALE(8*0 + i) * (tmp10 + tmp11));
-        data[8*4 + i] = lrintf(SCALE(8*4 + i) * (tmp10 - tmp11));
+        data[8*0 + i] = lrintf(postscale[8*0 + i] * (tmp10 + tmp11));
+        data[8*4 + i] = lrintf(postscale[8*4 + i] * (tmp10 - tmp11));
 
         tmp12 += tmp13;
         tmp12 *= A1;
-        data[8*2 + i] = lrintf(SCALE(8*2 + i) * (tmp13 + tmp12));
-        data[8*6 + i] = lrintf(SCALE(8*6 + i) * (tmp13 - tmp12));
+        data[8*2 + i] = lrintf(postscale[8*2 + i] * (tmp13 + tmp12));
+        data[8*6 + i] = lrintf(postscale[8*6 + i] * (tmp13 - tmp12));
 
         tmp10 = tmp4 + tmp7;
         tmp11 = tmp5 + tmp6;
         tmp12 = tmp5 - tmp6;
         tmp13 = tmp4 - tmp7;
 
-        data[8*1 + i] = lrintf(SCALE(8*0 + i) * (tmp10 + tmp11));
-        data[8*5 + i] = lrintf(SCALE(8*4 + i) * (tmp10 - tmp11));
+        data[8*1 + i] = lrintf(postscale[8*0 + i] * (tmp10 + tmp11));
+        data[8*5 + i] = lrintf(postscale[8*4 + i] * (tmp10 - tmp11));
 
         tmp12 += tmp13;
         tmp12 *= A1;
-        data[8*3 + i] = lrintf(SCALE(8*2 + i) * (tmp13 + tmp12));
-        data[8*7 + i] = lrintf(SCALE(8*6 + i) * (tmp13 - tmp12));
+        data[8*3 + i] = lrintf(postscale[8*2 + i] * (tmp13 + tmp12));
+        data[8*7 + i] = lrintf(postscale[8*6 + i] * (tmp13 - tmp12));
     }
 }
diff --git a/libavcodec/faandct.h b/libavcodec/faandct.h
index f43b62f..a12dcaf 100644
--- a/libavcodec/faandct.h
+++ b/libavcodec/faandct.h
@@ -31,8 +31,6 @@
 
 #include "dsputil.h"
 
-#define FAAN_POSTSCALE
-
 void ff_faandct(DCTELEM * data);
 void ff_faandct248(DCTELEM * data);
 
diff --git a/libavcodec/flac_parser.c b/libavcodec/flac_parser.c
index 83c03c3..217461f 100644
--- a/libavcodec/flac_parser.c
+++ b/libavcodec/flac_parser.c
@@ -573,8 +573,7 @@ static int flac_parse(AVCodecParserContext *s, AVCodecContext *avctx,
             av_fifo_generic_write(fpc->fifo_buf, (void*) read_start,
                                   read_end - read_start, NULL);
         } else {
-            int8_t pad[MAX_FRAME_HEADER_SIZE];
-            memset(pad, 0, sizeof(pad));
+            int8_t pad[MAX_FRAME_HEADER_SIZE] = { 0 };
             av_fifo_generic_write(fpc->fifo_buf, (void*) pad, sizeof(pad), NULL);
         }
 
diff --git a/libavcodec/intrax8dsp.c b/libavcodec/intrax8dsp.c
index 692e1b1..2983f3d 100644
--- a/libavcodec/intrax8dsp.c
+++ b/libavcodec/intrax8dsp.c
@@ -152,10 +152,8 @@ static void spatial_compensation_0(uint8_t *src , uint8_t *dst, int linesize){
     int x,y;
     unsigned int p;//power divided by 2
     int a;
-    uint16_t left_sum[2][8];
-    uint16_t  top_sum[2][8];
-    memset(left_sum,0,2*8*sizeof(uint16_t));
-    memset( top_sum,0,2*8*sizeof(uint16_t));
+    uint16_t left_sum[2][8] = { { 0 } };
+    uint16_t  top_sum[2][8] = { { 0 } };
 
     for(i=0;i<8;i++){
         a=src[area2+7-i]<<4;
diff --git a/libavcodec/jpeglsenc.c b/libavcodec/jpeglsenc.c
index aadea77..2a333c0 100644
--- a/libavcodec/jpeglsenc.c
+++ b/libavcodec/jpeglsenc.c
@@ -210,8 +210,7 @@ static inline void ls_encode_line(JLSState *state, PutBitContext *pb, void *last
 
 static void ls_store_lse(JLSState *state, PutBitContext *pb){
     /* Test if we have default params and don't need to store LSE */
-    JLSState state2;
-    memset(&state2, 0, sizeof(JLSState));
+    JLSState state2 = { 0 };
     state2.bpp = state->bpp;
     state2.near = state->near;
     ff_jpegls_reset_coding_parameters(&state2, 1);
diff --git a/libavcodec/lagarith.c b/libavcodec/lagarith.c
index ce8af64..eea5c81 100644
--- a/libavcodec/lagarith.c
+++ b/libavcodec/lagarith.c
@@ -251,21 +251,22 @@ static void lag_pred_line(LagarithContext *l, uint8_t *buf,
         /* Left prediction only for first line */
         L = l->dsp.add_hfyu_left_prediction(buf + 1, buf + 1,
                                             width - 1, buf[0]);
-        return;
-    }
-    /* Left pixel is actually prev_row[width] */
-    L = buf[width - stride - 1];
-    if (line == 1) {
-        /* Second line, left predict first pixel, the rest of the line is median predicted
-         * NOTE: In the case of RGB this pixel is top predicted */
-        TL = l->avctx->pix_fmt == PIX_FMT_YUV420P ? buf[-stride] : L;
     } else {
-        /* Top left is 2 rows back, last pixel */
-        TL = buf[width - (2 * stride) - 1];
-    }
+        /* Left pixel is actually prev_row[width] */
+        L = buf[width - stride - 1];
+
+        if (line == 1) {
+            /* Second line, left predict first pixel, the rest of the line is median predicted
+             * NOTE: In the case of RGB this pixel is top predicted */
+            TL = l->avctx->pix_fmt == PIX_FMT_YUV420P ? buf[-stride] : L;
+        } else {
+            /* Top left is 2 rows back, last pixel */
+            TL = buf[width - (2 * stride) - 1];
+        }
 
-    add_lag_median_prediction(buf, buf - stride, buf,
-                              width, &L, &TL);
+        add_lag_median_prediction(buf, buf - stride, buf,
+                                  width, &L, &TL);
+    }
 }
 
 static int lag_decode_line(LagarithContext *l, lag_rac *rac,
@@ -311,13 +312,13 @@ handle_zeros:
 }
 
 static int lag_decode_zero_run_line(LagarithContext *l, uint8_t *dst,
-                                    const uint8_t *src, const uint8_t *srcend, int width,
-                                    int esc_count)
+                                    const uint8_t *src, const uint8_t *src_end,
+                                    int width, int esc_count)
 {
     int i = 0;
     int count;
     uint8_t zero_run = 0;
-    const uint8_t *start = src;
+    const uint8_t *src_start = src;
     uint8_t mask1 = -(esc_count < 2);
     uint8_t mask2 = -(esc_count < 3);
     uint8_t *end = dst + (width - 2);
@@ -334,8 +335,8 @@ output_zeros:
         i = 0;
         while (!zero_run && dst + i < end) {
             i++;
-            if (i+2 >= srcend - src)
-                return src - start;
+            if (i+2 >= src_end - src)
+                return AVERROR_INVALIDDATA;
             zero_run =
                 !(src[i] | (src[i + 1] & mask1) | (src[i + 2] & mask2));
         }
@@ -351,9 +352,10 @@ output_zeros:
         } else {
             memcpy(dst, src, i);
             src += i;
+            dst += i;
         }
     }
-    return  src - start;
+    return  src - src_start;
 }
 
 
@@ -369,7 +371,7 @@ static int lag_decode_arith_plane(LagarithContext *l, uint8_t *dst,
     int esc_count;
     GetBitContext gb;
     lag_rac rac;
-    const uint8_t *srcend = src + src_size;
+    const uint8_t *src_end = src + src_size;
 
     rac.avctx = l->avctx;
     l->zeros = 0;
@@ -406,12 +408,16 @@ static int lag_decode_arith_plane(LagarithContext *l, uint8_t *dst,
         esc_count -= 4;
         if (esc_count > 0) {
             /* Zero run coding only, no range coding. */
-            for (i = 0; i < height; i++)
-                src += lag_decode_zero_run_line(l, dst + (i * stride), src, srcend,
-                                                width, esc_count);
+            for (i = 0; i < height; i++) {
+                int res = lag_decode_zero_run_line(l, dst + (i * stride), src,
+                                                   src_end, width, esc_count);
+                if (res < 0)
+                    return res;
+                src += res;
+            }
         } else {
-            if (src_size < height * width)
-                return -1;
+            if (src_size < width * height)
+                return AVERROR_INVALIDDATA; // buffer not big enough
             /* Plane is stored uncompressed */
             for (i = 0; i < height; i++) {
                 memcpy(dst + (i * stride), src, width);
@@ -518,15 +524,18 @@ static int lag_decode_frame(AVCodecContext *avctx,
         }
         for (i = 0; i < planes; i++)
             srcs[i] = l->rgb_planes + (i + 1) * l->rgb_stride * avctx->height - l->rgb_stride;
-        for (i = 0; i < planes; i++) {
+        for (i = 0; i < planes; i++)
             if (buf_size <= offs[i]) {
+                av_log(avctx, AV_LOG_ERROR,
+                        "Invalid frame offsets\n");
                 return AVERROR_INVALIDDATA;
             }
+
+        for (i = 0; i < planes; i++)
             lag_decode_arith_plane(l, srcs[i],
                                    avctx->width, avctx->height,
                                    -l->rgb_stride, buf + offs[i],
                                    buf_size - offs[i]);
-        }
         dst = p->data[0];
         for (i = 0; i < planes; i++)
             srcs[i] = l->rgb_planes + i * l->rgb_stride * avctx->height;
@@ -563,6 +572,14 @@ static int lag_decode_frame(AVCodecContext *avctx,
             return AVERROR_INVALIDDATA;
         }
 
+        if (offset_ry >= buf_size ||
+            offset_gu >= buf_size ||
+            offset_bv >= buf_size) {
+            av_log(avctx, AV_LOG_ERROR,
+                   "Invalid frame offsets\n");
+            return AVERROR_INVALIDDATA;
+        }
+
         lag_decode_arith_plane(l, p->data[0], avctx->width, avctx->height,
                                p->linesize[0], buf + offset_ry,
                                buf_size - offset_ry);
diff --git a/libavcodec/lagarithrac.c b/libavcodec/lagarithrac.c
index b3ad941..9f7bc41 100644
--- a/libavcodec/lagarithrac.c
+++ b/libavcodec/lagarithrac.c
@@ -32,15 +32,17 @@
 
 void ff_lag_rac_init(lag_rac *l, GetBitContext *gb, int length)
 {
-    int i, j;
+    int i, j, left;
 
     /* According to reference decoder "1st byte is garbage",
      * however, it gets skipped by the call to align_get_bits()
      */
     align_get_bits(gb);
+    left                = get_bits_left(gb) >> 3;
     l->bytestream_start =
     l->bytestream       = gb->buffer + get_bits_count(gb) / 8;
-    l->bytestream_end   = l->bytestream_start + get_bits_left(gb) / 8;
+    l->bytestream_end   = l->bytestream_start + left;
+
     l->range        = 0x80;
     l->low          = *l->bytestream >> 1;
     l->hash_shift   = FFMAX(l->scale - 8, 0);
diff --git a/libavcodec/libxvid_rc.c b/libavcodec/libxvid_rc.c
index d65e4f2..d18fc86 100644
--- a/libavcodec/libxvid_rc.c
+++ b/libavcodec/libxvid_rc.c
@@ -36,8 +36,8 @@ extern unsigned int xvid_debug;
 int ff_xvid_rate_control_init(MpegEncContext *s){
     char *tmp_name;
     int fd, i;
-    xvid_plg_create_t xvid_plg_create;
-    xvid_plugin_2pass2_t xvid_2pass2;
+    xvid_plg_create_t xvid_plg_create = { 0 };
+    xvid_plugin_2pass2_t xvid_2pass2  = { 0 };
 
 //xvid_debug=-1;
 
@@ -67,7 +67,6 @@ int ff_xvid_rate_control_init(MpegEncContext *s){
 
     close(fd);
 
-    memset(&xvid_2pass2, 0, sizeof(xvid_2pass2));
     xvid_2pass2.version= XVID_MAKE_VERSION(1,1,0);
     xvid_2pass2.filename= tmp_name;
     xvid_2pass2.bitrate= s->avctx->bit_rate;
@@ -75,7 +74,6 @@ int ff_xvid_rate_control_init(MpegEncContext *s){
     xvid_2pass2.vbv_maxrate= s->avctx->rc_max_rate;
     xvid_2pass2.vbv_initial= s->avctx->rc_initial_buffer_occupancy;
 
-    memset(&xvid_plg_create, 0, sizeof(xvid_plg_create));
     xvid_plg_create.version= XVID_MAKE_VERSION(1,1,0);
     xvid_plg_create.fbase= s->avctx->time_base.den;
     xvid_plg_create.fincr= s->avctx->time_base.num;
@@ -89,9 +87,8 @@ int ff_xvid_rate_control_init(MpegEncContext *s){
 }
 
 float ff_xvid_rate_estimate_qscale(MpegEncContext *s, int dry_run){
-    xvid_plg_data_t xvid_plg_data;
+    xvid_plg_data_t xvid_plg_data = { 0 };
 
-    memset(&xvid_plg_data, 0, sizeof(xvid_plg_data));
     xvid_plg_data.version= XVID_MAKE_VERSION(1,1,0);
     xvid_plg_data.width = s->width;
     xvid_plg_data.height= s->height;
diff --git a/libavcodec/libxvidff.c b/libavcodec/libxvidff.c
index 3bca945..3ec75fe 100644
--- a/libavcodec/libxvidff.c
+++ b/libavcodec/libxvidff.c
@@ -94,11 +94,11 @@ static av_cold int xvid_encode_init(AVCodecContext *avctx)  {
     uint16_t *intra, *inter;
     int fd;
 
-    xvid_plugin_single_t single;
-    struct xvid_ff_pass1 rc2pass1;
-    xvid_plugin_2pass2_t rc2pass2;
-    xvid_gbl_init_t xvid_gbl_init;
-    xvid_enc_create_t xvid_enc_create;
+    xvid_plugin_single_t single       = { 0 };
+    struct xvid_ff_pass1 rc2pass1     = { 0 };
+    xvid_plugin_2pass2_t rc2pass2     = { 0 };
+    xvid_gbl_init_t xvid_gbl_init     = { 0 };
+    xvid_enc_create_t xvid_enc_create = { 0 };
     xvid_enc_plugin_t plugins[7];
 
     /* Bring in VOP flags from ffmpeg command-line */
@@ -168,7 +168,6 @@ static av_cold int xvid_encode_init(AVCodecContext *avctx)  {
             x->me_flags |= XVID_ME_QUARTERPELREFINE8;
     }
 
-    memset(&xvid_gbl_init, 0, sizeof(xvid_gbl_init));
     xvid_gbl_init.version = XVID_VERSION;
     xvid_gbl_init.debug = 0;
 
@@ -189,7 +188,6 @@ static av_cold int xvid_encode_init(AVCodecContext *avctx)  {
     xvid_global(NULL, XVID_GBL_INIT, &xvid_gbl_init, NULL);
 
     /* Create the encoder reference */
-    memset(&xvid_enc_create, 0, sizeof(xvid_enc_create));
     xvid_enc_create.version = XVID_VERSION;
 
     /* Store the desired frame size */
@@ -214,7 +212,6 @@ static av_cold int xvid_encode_init(AVCodecContext *avctx)  {
     x->twopassfile = NULL;
 
     if( xvid_flags & CODEC_FLAG_PASS1 ) {
-        memset(&rc2pass1, 0, sizeof(struct xvid_ff_pass1));
         rc2pass1.version = XVID_VERSION;
         rc2pass1.context = x;
         x->twopassbuffer = av_malloc(BUFFER_SIZE);
@@ -230,7 +227,6 @@ static av_cold int xvid_encode_init(AVCodecContext *avctx)  {
         plugins[xvid_enc_create.num_plugins].param = &rc2pass1;
         xvid_enc_create.num_plugins++;
     } else if( xvid_flags & CODEC_FLAG_PASS2 ) {
-        memset(&rc2pass2, 0, sizeof(xvid_plugin_2pass2_t));
         rc2pass2.version = XVID_VERSION;
         rc2pass2.bitrate = avctx->bit_rate;
 
@@ -262,7 +258,6 @@ static av_cold int xvid_encode_init(AVCodecContext *avctx)  {
         xvid_enc_create.num_plugins++;
     } else if( !(xvid_flags & CODEC_FLAG_QSCALE) ) {
         /* Single Pass Bitrate Control! */
-        memset(&single, 0, sizeof(xvid_plugin_single_t));
         single.version = XVID_VERSION;
         single.bitrate = avctx->bit_rate;
 
@@ -382,16 +377,14 @@ static int xvid_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
     int mb_width   = (avctx->width  + 15) / 16;
     int mb_height  = (avctx->height + 15) / 16;
 
-    xvid_enc_frame_t xvid_enc_frame;
-    xvid_enc_stats_t xvid_enc_stats;
+    xvid_enc_frame_t xvid_enc_frame = { 0 };
+    xvid_enc_stats_t xvid_enc_stats = { 0 };
 
     if ((ret = ff_alloc_packet2(avctx, pkt, mb_width*mb_height*MAX_MB_BYTES + FF_MIN_BUFFER_SIZE)) < 0)
         return ret;
 
     /* Start setting up the frame */
-    memset(&xvid_enc_frame, 0, sizeof(xvid_enc_frame));
     xvid_enc_frame.version = XVID_VERSION;
-    memset(&xvid_enc_stats, 0, sizeof(xvid_enc_stats));
     xvid_enc_stats.version = XVID_VERSION;
     *p = *picture;
 
diff --git a/libavcodec/mjpegdec.c b/libavcodec/mjpegdec.c
index 70798fd..d369518 100644
--- a/libavcodec/mjpegdec.c
+++ b/libavcodec/mjpegdec.c
@@ -47,14 +47,13 @@ static int build_vlc(VLC *vlc, const uint8_t *bits_table,
                      const uint8_t *val_table, int nb_codes,
                      int use_static, int is_ac)
 {
-    uint8_t huff_size[256];
+    uint8_t huff_size[256] = { 0 };
     uint16_t huff_code[256];
     uint16_t huff_sym[256];
     int i;
 
     assert(nb_codes <= 256);
 
-    memset(huff_size, 0, sizeof(huff_size));
     ff_mjpeg_build_huffman_codes(huff_size, huff_code, bits_table, val_table);
 
     for (i = 0; i < 256; i++)
diff --git a/libavcodec/motion_est.c b/libavcodec/motion_est.c
index ad63952..2708a1e 100644
--- a/libavcodec/motion_est.c
+++ b/libavcodec/motion_est.c
@@ -1435,9 +1435,8 @@ static inline int bidir_refine(MpegEncContext * s, int mb_x, int mb_y)
 #define HASH(fx,fy,bx,by) ((fx)+17*(fy)+63*(bx)+117*(by))
 #define HASH8(fx,fy,bx,by) ((uint8_t)HASH(fx,fy,bx,by))
     int hashidx= HASH(motion_fx,motion_fy, motion_bx, motion_by);
-    uint8_t map[256];
+    uint8_t map[256] = { 0 };
 
-    memset(map,0,sizeof(map));
     map[hashidx&255] = 1;
 
     fbmin= check_bidir_mv(s, motion_fx, motion_fy,
diff --git a/libavcodec/mpegaudiodec.c b/libavcodec/mpegaudiodec.c
index 51db72a..c2d8dd5 100644
--- a/libavcodec/mpegaudiodec.c
+++ b/libavcodec/mpegaudiodec.c
@@ -304,11 +304,8 @@ static av_cold void decode_init_static(void)
     for (i = 1; i < 16; i++) {
         const HuffTable *h = &mpa_huff_tables[i];
         int xsize, x, y;
-        uint8_t  tmp_bits [512];
-        uint16_t tmp_codes[512];
-
-        memset(tmp_bits , 0, sizeof(tmp_bits ));
-        memset(tmp_codes, 0, sizeof(tmp_codes));
+        uint8_t  tmp_bits [512] = { 0 };
+        uint16_t tmp_codes[512] = { 0 };
 
         xsize = h->xsize;
 
diff --git a/libavcodec/mpegvideo_enc.c b/libavcodec/mpegvideo_enc.c
index 79ebaf0..17a2512 100644
--- a/libavcodec/mpegvideo_enc.c
+++ b/libavcodec/mpegvideo_enc.c
@@ -80,11 +80,8 @@ void ff_convert_matrix(DSPContext *dsp, int (*qmat)[64],
     for (qscale = qmin; qscale <= qmax; qscale++) {
         int i;
         if (dsp->fdct == ff_jpeg_fdct_islow_8 ||
-            dsp->fdct == ff_jpeg_fdct_islow_10
-#ifdef FAAN_POSTSCALE
-            || dsp->fdct == ff_faandct
-#endif
-            ) {
+            dsp->fdct == ff_jpeg_fdct_islow_10 ||
+            dsp->fdct == ff_faandct) {
             for (i = 0; i < 64; i++) {
                 const int j = dsp->idct_permutation[i];
                 /* 16 <= qscale * quant_matrix[i] <= 7905
@@ -96,11 +93,7 @@ void ff_convert_matrix(DSPContext *dsp, int (*qmat)[64],
                 qmat[qscale][i] = (int)((UINT64_C(1) << QMAT_SHIFT) /
                                         (qscale * quant_matrix[j]));
             }
-        } else if (dsp->fdct == ff_fdct_ifast
-#ifndef FAAN_POSTSCALE
-                   || dsp->fdct == ff_faandct
-#endif
-                   ) {
+        } else if (dsp->fdct == ff_fdct_ifast) {
             for (i = 0; i < 64; i++) {
                 const int j = dsp->idct_permutation[i];
                 /* 16 <= qscale * quant_matrix[i] <= 7905
@@ -138,11 +131,7 @@ void ff_convert_matrix(DSPContext *dsp, int (*qmat)[64],
 
         for (i = intra; i < 64; i++) {
             int64_t max = 8191;
-            if (dsp->fdct == ff_fdct_ifast
-#ifndef FAAN_POSTSCALE
-                || dsp->fdct == ff_faandct
-#endif
-               ) {
+            if (dsp->fdct == ff_fdct_ifast) {
                 max = (8191LL * ff_aanscales[i]) >> 14;
             }
             while (((max * qmat[qscale][i]) >> shift) > INT_MAX) {
@@ -3516,11 +3505,7 @@ static int dct_quantize_trellis_c(MpegEncContext *s,
         int dct_coeff= FFABS(block[ scantable[i] ]);
         int best_score=256*256*256*120;
 
-        if (   s->dsp.fdct == ff_fdct_ifast
-#ifndef FAAN_POSTSCALE
-            || s->dsp.fdct == ff_faandct
-#endif
-           )
+        if (s->dsp.fdct == ff_fdct_ifast)
             dct_coeff= (dct_coeff*ff_inv_aanscales[ scantable[i] ]) >> 12;
         zero_distortion= dct_coeff*dct_coeff;
 
diff --git a/libavcodec/ra144enc.c b/libavcodec/ra144enc.c
index 9d74380..6c08a70 100644
--- a/libavcodec/ra144enc.c
+++ b/libavcodec/ra144enc.c
@@ -342,7 +342,7 @@ static void ra144_encode_subblock(RA144Context *ractx,
                                   const int16_t *lpc_coefs, unsigned int rms,
                                   PutBitContext *pb)
 {
-    float data[BLOCKSIZE], work[LPC_ORDER + BLOCKSIZE];
+    float data[BLOCKSIZE] = { 0 }, work[LPC_ORDER + BLOCKSIZE];
     float coefs[LPC_ORDER];
     float zero[BLOCKSIZE], cba[BLOCKSIZE], cb1[BLOCKSIZE], cb2[BLOCKSIZE];
     int16_t cba_vect[BLOCKSIZE];
@@ -360,7 +360,6 @@ static void ra144_encode_subblock(RA144Context *ractx,
      * Calculate the zero-input response of the LPC filter and subtract it from
      * input data.
      */
-    memset(data, 0, sizeof(data));
     ff_celp_lp_synthesis_filterf(work + LPC_ORDER, coefs, data, BLOCKSIZE,
                                  LPC_ORDER);
     for (i = 0; i < BLOCKSIZE; i++) {
diff --git a/libavcodec/rangecoder.c b/libavcodec/rangecoder.c
index 04c2738..ef9a090 100644
--- a/libavcodec/rangecoder.c
+++ b/libavcodec/rangecoder.c
@@ -119,7 +119,7 @@ int main(void){
     uint8_t b[9*SIZE];
     uint8_t r[9*SIZE];
     int i;
-    uint8_t state[10]= {0};
+    uint8_t state[10];
     AVLFG prng;
 
     av_lfg_init(&prng, 1);
diff --git a/libavcodec/rv34.c b/libavcodec/rv34.c
index 235b3ed..afde77b 100644
--- a/libavcodec/rv34.c
+++ b/libavcodec/rv34.c
@@ -554,7 +554,7 @@ static void rv34_pred_mv_b(RV34DecContext *r, int block_type, int dir)
     MpegEncContext *s = &r->s;
     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
     int mv_pos = s->mb_x * 2 + s->mb_y * 2 * s->b8_stride;
-    int A[2], B[2], C[2];
+    int A[2] = { 0 }, B[2] = { 0 }, C[2] = { 0 };
     int has_A = 0, has_B = 0, has_C = 0;
     int mx, my;
     int i, j;
@@ -562,9 +562,6 @@ static void rv34_pred_mv_b(RV34DecContext *r, int block_type, int dir)
     const int mask = dir ? MB_TYPE_L1 : MB_TYPE_L0;
     int type = cur_pic->f.mb_type[mb_pos];
 
-    memset(A, 0, sizeof(A));
-    memset(B, 0, sizeof(B));
-    memset(C, 0, sizeof(C));
     if((r->avail_cache[6-1] & type) & mask){
         A[0] = cur_pic->f.motion_val[dir][mv_pos - 1][0];
         A[1] = cur_pic->f.motion_val[dir][mv_pos - 1][1];
diff --git a/libavcodec/smacker.c b/libavcodec/smacker.c
index 04994b2..d2f9df0 100644
--- a/libavcodec/smacker.c
+++ b/libavcodec/smacker.c
@@ -180,7 +180,7 @@ static int smacker_decode_header_tree(SmackVContext *smk, GetBitContext *gb, int
     int res;
     HuffContext huff;
     HuffContext tmp1, tmp2;
-    VLC vlc[2];
+    VLC vlc[2] = { { 0 } };
     int escapes[3];
     DBCtx ctx;
     int err = 0;
@@ -204,9 +204,6 @@ static int smacker_decode_header_tree(SmackVContext *smk, GetBitContext *gb, int
     tmp2.lengths = av_mallocz(256 * sizeof(int));
     tmp2.values = av_mallocz(256 * sizeof(int));
 
-    memset(&vlc[0], 0, sizeof(VLC));
-    memset(&vlc[1], 0, sizeof(VLC));
-
     if(get_bits1(gb)) {
         smacker_decode_tree(gb, &tmp1, 0, 0);
         skip_bits1(gb);
@@ -597,8 +594,8 @@ static int smka_decode_frame(AVCodecContext *avctx, void *data,
     const uint8_t *buf = avpkt->data;
     int buf_size = avpkt->size;
     GetBitContext gb;
-    HuffContext h[4];
-    VLC vlc[4];
+    HuffContext h[4] = { { 0 } };
+    VLC vlc[4]       = { { 0 } };
     int16_t *samples;
     uint8_t *samples8;
     int val;
@@ -641,8 +638,6 @@ static int smka_decode_frame(AVCodecContext *avctx, void *data,
     samples  = (int16_t *)s->frame.data[0];
     samples8 =            s->frame.data[0];
 
-    memset(vlc, 0, sizeof(VLC) * 4);
-    memset(h, 0, sizeof(HuffContext) * 4);
     // Initialize
     for(i = 0; i < (1 << (bits + stereo)); i++) {
         h[i].length = 256;
diff --git a/libavcodec/tiff.c b/libavcodec/tiff.c
index 28bae61..e2ea1d3 100644
--- a/libavcodec/tiff.c
+++ b/libavcodec/tiff.c
@@ -82,10 +82,9 @@ static unsigned tget(const uint8_t **p, int type, int le) {
 #if CONFIG_ZLIB
 static int tiff_uncompress(uint8_t *dst, unsigned long *len, const uint8_t *src, int size)
 {
-    z_stream zstream;
+    z_stream zstream = { 0 };
     int zret;
 
-    memset(&zstream, 0, sizeof(zstream));
     zstream.next_in = src;
     zstream.avail_in = size;
     zstream.next_out = dst;
diff --git a/libavcodec/truemotion1.c b/libavcodec/truemotion1.c
index 767eced..334d6bd 100644
--- a/libavcodec/truemotion1.c
+++ b/libavcodec/truemotion1.c
@@ -310,7 +310,7 @@ static int truemotion1_decode_header(TrueMotion1Context *s)
     int width_shift = 0;
     int new_pix_fmt;
     struct frame_header header;
-    uint8_t header_buffer[128];  /* logical maximum size of the header */
+    uint8_t header_buffer[128] = { 0 };  /* logical maximum size of the header */
     const uint8_t *sel_vector_table;
 
     header.header_size = ((s->buf[0] >> 5) | (s->buf[0] << 3)) & 0x7f;
@@ -321,7 +321,6 @@ static int truemotion1_decode_header(TrueMotion1Context *s)
     }
 
     /* unscramble the header bytes with a XOR operation */
-    memset(header_buffer, 0, 128);
     for (i = 1; i < header.header_size; i++)
         header_buffer[i - 1] = s->buf[i] ^ s->buf[i + 1];
 
diff --git a/libavcodec/wmalosslessdec.c b/libavcodec/wmalosslessdec.c
index af676f1..4f17a18 100644
--- a/libavcodec/wmalosslessdec.c
+++ b/libavcodec/wmalosslessdec.c
@@ -903,6 +903,7 @@ static int decode_subframe(WmallDecodeCtx *s)
     } else if (!s->cdlms[0][0].order) {
         av_log(s->avctx, AV_LOG_DEBUG,
                "Waiting for seekable tile\n");
+        s->frame.nb_samples = 0;
         return -1;
     }
 
@@ -1265,6 +1266,17 @@ static int decode_packet(AVCodecContext *avctx, void *data, int *got_frame_ptr,
     return (s->packet_loss) ? AVERROR_INVALIDDATA : get_bits_count(gb) >> 3;
 }
 
+static void flush(AVCodecContext *avctx)
+{
+    WmallDecodeCtx *s    = avctx->priv_data;
+    s->packet_loss       = 1;
+    s->packet_done       = 0;
+    s->num_saved_bits    = 0;
+    s->frame_offset      = 0;
+    s->next_packet_start = 0;
+    s->cdlms[0][0].order = 0;
+    s->frame.nb_samples  = 0;
+}
 
 AVCodec ff_wmalossless_decoder = {
     .name           = "wmalossless",
@@ -1273,6 +1285,7 @@ AVCodec ff_wmalossless_decoder = {
     .priv_data_size = sizeof(WmallDecodeCtx),
     .init           = decode_init,
     .decode         = decode_packet,
+    .flush          = flush,
     .capabilities   = CODEC_CAP_SUBFRAMES | CODEC_CAP_DR1 | CODEC_CAP_DELAY,
     .long_name      = NULL_IF_CONFIG_SMALL("Windows Media Audio Lossless"),
 };
diff --git a/libavcodec/wmaprodec.c b/libavcodec/wmaprodec.c
index 5440d64..287c598 100644
--- a/libavcodec/wmaprodec.c
+++ b/libavcodec/wmaprodec.c
@@ -521,7 +521,7 @@ static int decode_subframe_length(WMAProDecodeCtx *s, int offset)
  */
 static int decode_tilehdr(WMAProDecodeCtx *s)
 {
-    uint16_t num_samples[WMAPRO_MAX_CHANNELS];        /**< sum of samples for all currently known subframes of a channel */
+    uint16_t num_samples[WMAPRO_MAX_CHANNELS] = { 0 };/**< sum of samples for all currently known subframes of a channel */
     uint8_t  contains_subframe[WMAPRO_MAX_CHANNELS];  /**< flag indicating if a channel contains the current subframe */
     int channels_for_cur_subframe = s->num_channels;  /**< number of channels that contain the current subframe */
     int fixed_channel_layout = 0;                     /**< flag indicating that all channels use the same subframe offsets and sizes */
@@ -538,8 +538,6 @@ static int decode_tilehdr(WMAProDecodeCtx *s)
     for (c = 0; c < s->num_channels; c++)
         s->channel[c].num_subframes = 0;
 
-    memset(num_samples, 0, sizeof(num_samples));
-
     if (s->max_num_subframes == 1 || get_bits1(&s->gb))
         fixed_channel_layout = 1;
 
diff --git a/libavcodec/wmavoice.c b/libavcodec/wmavoice.c
index 66c0ce4..48b7901 100644
--- a/libavcodec/wmavoice.c
+++ b/libavcodec/wmavoice.c
@@ -318,10 +318,9 @@ static av_cold int decode_vbmtree(GetBitContext *gb, int8_t vbm_tree[25])
           0x0ffc, 0x0ffd, 0x0ffe,        //   1111111111+00/01/10
           0x3ffc, 0x3ffd, 0x3ffe, 0x3fff // 111111111111+xx
     };
-    int cntr[8], n, res;
+    int cntr[8] = { 0 }, n, res;
 
     memset(vbm_tree, 0xff, sizeof(vbm_tree[0]) * 25);
-    memset(cntr,     0,    sizeof(cntr));
     for (n = 0; n < 17; n++) {
         res = get_bits(gb, 3);
         if (cntr[res] > 3) // should be >= 3 + (res == 7))
diff --git a/libavcodec/x86/cabac.h b/libavcodec/x86/cabac.h
index 2bb0be6..0c4419b 100644
--- a/libavcodec/x86/cabac.h
+++ b/libavcodec/x86/cabac.h
@@ -27,7 +27,7 @@
 #include "config.h"
 
 #if HAVE_FAST_CMOV
-#define BRANCHLESS_GET_CABAC_UPDATE(ret, statep, low, lowword, range, tmp)\
+#define BRANCHLESS_GET_CABAC_UPDATE(ret, statep, low, range, tmp)\
         "mov    "tmp"       , %%ecx     \n\t"\
         "shl    $17         , "tmp"     \n\t"\
         "cmp    "low"       , "tmp"     \n\t"\
@@ -37,7 +37,7 @@
         "xor    %%ecx       , "ret"     \n\t"\
         "sub    "tmp"       , "low"     \n\t"
 #else /* HAVE_FAST_CMOV */
-#define BRANCHLESS_GET_CABAC_UPDATE(ret, statep, low, lowword, range, tmp)\
+#define BRANCHLESS_GET_CABAC_UPDATE(ret, statep, low, range, tmp)\
         "mov    "tmp"       , %%ecx     \n\t"\
         "shl    $17         , "tmp"     \n\t"\
         "sub    "low"       , "tmp"     \n\t"\
@@ -51,20 +51,20 @@
         "xor    "tmp"       , "ret"     \n\t"
 #endif /* HAVE_FAST_CMOV */
 
-#define BRANCHLESS_GET_CABAC(ret, statep, low, lowword, range, tmp, tmpbyte, byte) \
+#define BRANCHLESS_GET_CABAC(ret, statep, low, lowword, range, tmp, tmpbyte, byte, end) \
         "movzbl "statep"    , "ret"                                     \n\t"\
         "mov    "range"     , "tmp"                                     \n\t"\
         "and    $0xC0       , "range"                                   \n\t"\
         "movzbl "MANGLE(ff_h264_lps_range)"("ret", "range", 2), "range" \n\t"\
         "sub    "range"     , "tmp"                                     \n\t"\
-        BRANCHLESS_GET_CABAC_UPDATE(ret, statep, low, lowword, range, tmp)   \
+        BRANCHLESS_GET_CABAC_UPDATE(ret, statep, low, range, tmp)   \
         "movzbl " MANGLE(ff_h264_norm_shift) "("range"), %%ecx          \n\t"\
         "shl    %%cl        , "range"                                   \n\t"\
         "movzbl "MANGLE(ff_h264_mlps_state)"+128("ret"), "tmp"          \n\t"\
         "shl    %%cl        , "low"                                     \n\t"\
         "mov    "tmpbyte"   , "statep"                                  \n\t"\
         "test   "lowword"   , "lowword"                                 \n\t"\
-        " jnz   1f                                                      \n\t"\
+        " jnz   2f                                                      \n\t"\
         "mov    "byte"      , %%"REG_c"                                 \n\t"\
         "add"OPSIZE" $2     , "byte"                                    \n\t"\
         "movzwl (%%"REG_c")     , "tmp"                                 \n\t"\
@@ -79,7 +79,7 @@
         "add    $7          , %%ecx                                     \n\t"\
         "shl    %%cl        , "tmp"                                     \n\t"\
         "add    "tmp"       , "low"                                     \n\t"\
-        "1:                                                             \n\t"
+        "2:                                                             \n\t"
 
 
 #if HAVE_7REGS && !defined(BROKEN_RELOCATIONS) && !(defined(__i386) && defined(__clang__) && (__clang_major__<2 || (__clang_major__==2 && __clang_minor__<10)))\
@@ -91,11 +91,13 @@ static av_always_inline int get_cabac_inline_x86(CABACContext *c,
     int bit, tmp;
 
     __asm__ volatile(
-        BRANCHLESS_GET_CABAC("%0", "(%5)", "%1", "%w1", "%2",
-                             "%3", "%b3", "%4")
-        :"=&r"(bit), "+&r"(c->low), "+&r"(c->range), "=&q"(tmp),
-         "+m"(c->bytestream)
-        :"r"(state)
+        BRANCHLESS_GET_CABAC("%0", "(%4)", "%1", "%w1",
+                             "%2", "%3", "%b3",
+                             "%a6(%5)", "%a7(%5)")
+        : "=&r"(bit), "+&r"(c->low), "+&r"(c->range), "=&q"(tmp)
+        : "r"(state), "r"(c),
+          "i"(offsetof(CABACContext, bytestream)),
+          "i"(offsetof(CABACContext, bytestream_end))
         : "%"REG_c, "memory"
     );
     return bit & 1;
@@ -107,32 +109,36 @@ static av_always_inline int get_cabac_bypass_sign_x86(CABACContext *c, int val)
 {
     x86_reg tmp;
     __asm__ volatile(
-        "movl %4, %k1                           \n\t"
-        "movl %2, %%eax                         \n\t"
-        "shl $17, %k1                           \n\t"
-        "add %%eax, %%eax                       \n\t"
-        "sub %k1, %%eax                         \n\t"
-        "cltd                                   \n\t"
-        "and %%edx, %k1                         \n\t"
-        "add %k1, %%eax                         \n\t"
-        "xor %%edx, %%ecx                       \n\t"
-        "sub %%edx, %%ecx                       \n\t"
-        "test %%ax, %%ax                        \n\t"
-        " jnz 1f                                \n\t"
-        "mov  %3, %1                            \n\t"
-        "subl $0xFFFF, %%eax                    \n\t"
-        "movzwl (%1), %%edx                     \n\t"
-        "bswap %%edx                            \n\t"
-        "shrl $15, %%edx                        \n\t"
-        "add  $2, %1                            \n\t"
-        "addl %%edx, %%eax                      \n\t"
-        "mov  %1, %3                            \n\t"
-        "1:                                     \n\t"
-        "movl %%eax, %2                         \n\t"
+        "movl        %a6(%2), %k1       \n\t"
+        "movl        %a3(%2), %%eax     \n\t"
+        "shl             $17, %k1       \n\t"
+        "add           %%eax, %%eax     \n\t"
+        "sub             %k1, %%eax     \n\t"
+        "cltd                           \n\t"
+        "and           %%edx, %k1       \n\t"
+        "add             %k1, %%eax     \n\t"
+        "xor           %%edx, %%ecx     \n\t"
+        "sub           %%edx, %%ecx     \n\t"
+        "test           %%ax, %%ax      \n\t"
+        "jnz              1f            \n\t"
+        "mov         %a4(%2), %1        \n\t"
+        "subl        $0xFFFF, %%eax     \n\t"
+        "movzwl         (%1), %%edx     \n\t"
+        "bswap         %%edx            \n\t"
+        "shrl            $15, %%edx     \n\t"
+        "add              $2, %1        \n\t"
+        "addl          %%edx, %%eax     \n\t"
+        "mov              %1, %a4(%2)   \n\t"
+        "1:                             \n\t"
+        "movl          %%eax, %a3(%2)   \n\t"
 
-        :"+c"(val), "=&r"(tmp), "+m"(c->low), "+m"(c->bytestream)
-        :"m"(c->range)
-        : "%eax", "%edx"
+        : "+c"(val), "=&r"(tmp)
+        : "r"(c),
+          "i"(offsetof(CABACContext, low)),
+          "i"(offsetof(CABACContext, bytestream)),
+          "i"(offsetof(CABACContext, bytestream_end)),
+          "i"(offsetof(CABACContext, range))
+        : "%eax", "%edx", "memory"
     );
     return val;
 }
diff --git a/libavcodec/x86/h264_i386.h b/libavcodec/x86/h264_i386.h
index 510f726..6aa2d07 100644
--- a/libavcodec/x86/h264_i386.h
+++ b/libavcodec/x86/h264_i386.h
@@ -46,17 +46,19 @@ static int decode_significance_x86(CABACContext *c, int max_coeff,
     int bit;
     x86_reg coeff_count;
     __asm__ volatile(
-        "2:                                     \n\t"
+        "3:                                     \n\t"
 
-        BRANCHLESS_GET_CABAC("%4", "(%1)", "%3",
-                             "%w3", "%5", "%k0", "%b0", "%6")
+        BRANCHLESS_GET_CABAC("%4", "(%1)", "%3", "%w3",
+                             "%5", "%k0", "%b0",
+                             "%a11(%6)", "%a12(%6)")
 
         "test $1, %4                            \n\t"
-        " jz 3f                                 \n\t"
+        " jz 4f                                 \n\t"
         "add  %10, %1                           \n\t"
 
-        BRANCHLESS_GET_CABAC("%4", "(%1)", "%3",
-                             "%w3", "%5", "%k0", "%b0", "%6")
+        BRANCHLESS_GET_CABAC("%4", "(%1)", "%3", "%w3",
+                             "%5", "%k0", "%b0",
+                             "%a11(%6)", "%a12(%6)")
 
         "sub  %10, %1                           \n\t"
         "mov  %2, %0                            \n\t"
@@ -65,25 +67,26 @@ static int decode_significance_x86(CABACContext *c, int max_coeff,
         "movl %%ecx, (%0)                       \n\t"
 
         "test $1, %4                            \n\t"
-        " jnz 4f                                \n\t"
+        " jnz 5f                                \n\t"
 
         "add"OPSIZE"  $4, %2                    \n\t"
 
-        "3:                                     \n\t"
+        "4:                                     \n\t"
         "add  $1, %1                            \n\t"
         "cmp  %8, %1                            \n\t"
-        " jb 2b                                 \n\t"
+        " jb 3b                                 \n\t"
         "mov  %2, %0                            \n\t"
         "movl %7, %%ecx                         \n\t"
         "add  %1, %%"REG_c"                     \n\t"
         "movl %%ecx, (%0)                       \n\t"
-        "4:                                     \n\t"
+        "5:                                     \n\t"
         "add  %9, %k0                           \n\t"
         "shr $2, %k0                            \n\t"
-        :"=&q"(coeff_count), "+r"(significant_coeff_ctx_base), "+m"(index),
-         "+&r"(c->low), "=&r"(bit), "+&r"(c->range),
-         "+m"(c->bytestream)
-        :"m"(minusstart), "m"(end), "m"(minusindex), "m"(last_off)
+        : "=&q"(coeff_count), "+r"(significant_coeff_ctx_base), "+m"(index),
+          "+&r"(c->low), "=&r"(bit), "+&r"(c->range)
+        : "r"(c), "m"(minusstart), "m"(end), "m"(minusindex), "m"(last_off),
+          "i"(offsetof(CABACContext, bytestream)),
+          "i"(offsetof(CABACContext, bytestream_end))
         : "%"REG_c, "memory"
     );
     return coeff_count;
@@ -99,47 +102,52 @@ static int decode_significance_8x8_x86(CABACContext *c,
     x86_reg state;
     __asm__ volatile(
         "mov %1, %6                             \n\t"
-        "2:                                     \n\t"
+        "3:                                     \n\t"
 
         "mov %10, %0                            \n\t"
         "movzbl (%0, %6), %k6                   \n\t"
         "add %9, %6                             \n\t"
 
-        BRANCHLESS_GET_CABAC("%4", "(%6)", "%3",
-                             "%w3", "%5", "%k0", "%b0", "%7")
+        BRANCHLESS_GET_CABAC("%4", "(%6)", "%3", "%w3",
+                             "%5", "%k0", "%b0",
+                             "%a12(%7)", "%a13(%7)")
 
         "mov %1, %k6                            \n\t"
         "test $1, %4                            \n\t"
-        " jz 3f                                 \n\t"
+        " jz 4f                                 \n\t"
 
         "movzbl "MANGLE(last_coeff_flag_offset_8x8)"(%k6), %k6\n\t"
         "add %11, %6                            \n\t"
 
-        BRANCHLESS_GET_CABAC("%4", "(%6)", "%3",
-                             "%w3", "%5", "%k0", "%b0", "%7")
+        BRANCHLESS_GET_CABAC("%4", "(%6)", "%3", "%w3",
+                             "%5", "%k0", "%b0",
+                             "%a12(%7)", "%a13(%7)")
 
         "mov %2, %0                             \n\t"
         "mov %1, %k6                            \n\t"
         "movl %k6, (%0)                         \n\t"
 
         "test $1, %4                            \n\t"
-        " jnz 4f                                \n\t"
+        " jnz 5f                                \n\t"
 
         "add"OPSIZE"  $4, %2                    \n\t"
 
-        "3:                                     \n\t"
+        "4:                                     \n\t"
         "addl $1, %k6                           \n\t"
         "mov %k6, %1                            \n\t"
         "cmpl $63, %k6                          \n\t"
-        " jb 2b                                 \n\t"
+        " jb 3b                                 \n\t"
         "mov %2, %0                             \n\t"
         "movl %k6, (%0)                         \n\t"
-        "4:                                     \n\t"
+        "5:                                     \n\t"
         "addl %8, %k0                           \n\t"
         "shr $2, %k0                            \n\t"
-        :"=&q"(coeff_count),"+m"(last), "+m"(index), "+&r"(c->low), "=&r"(bit),
-         "+&r"(c->range), "=&r"(state), "+m"(c->bytestream)
-        :"m"(minusindex), "m"(significant_coeff_ctx_base), "m"(sig_off), "m"(last_coeff_ctx_base)
+        : "=&q"(coeff_count), "+m"(last), "+m"(index), "+&r"(c->low),
+          "=&r"(bit), "+&r"(c->range), "=&r"(state)
+        : "r"(c), "m"(minusindex), "m"(significant_coeff_ctx_base),
+          "m"(sig_off), "m"(last_coeff_ctx_base),
+          "i"(offsetof(CABACContext, bytestream)),
+          "i"(offsetof(CABACContext, bytestream_end))
         : "%"REG_c, "memory"
     );
     return coeff_count;