all: Remove unused-but-set variables

Newer versions of Clang detect this and emit warnings for it.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

8 files changed, 3 insertions, 27 deletions

diff --git a/libavcodec/aaccoder.c b/libavcodec/aaccoder.c
index 11b0559e1c..7bbd4d5b2e 100644
--- a/libavcodec/aaccoder.c
+++ b/libavcodec/aaccoder.c
@@ -414,11 +414,10 @@ static void search_for_quantizers_fast(AVCodecContext *avctx, AACEncContext *s,
         start = 0;
         for (g = 0; g < sce->ics.num_swb; g++) {
             int nz = 0;
-            float uplim = 0.0f, energy = 0.0f;
+            float uplim = 0.0f;
             for (w2 = 0; w2 < sce->ics.group_len[w]; w2++) {
                 FFPsyBand *band = &s->psy.ch[s->cur_channel].psy_bands[(w+w2)*16+g];
                 uplim += band->threshold;
-                energy += band->energy;
                 if (band->energy <= band->threshold || band->threshold == 0.0f) {
                     sce->zeroes[(w+w2)*16+g] = 1;
                     continue;
diff --git a/libavcodec/cinepakenc.c b/libavcodec/cinepakenc.c
index edb553f0db..0574b125d7 100644
--- a/libavcodec/cinepakenc.c
+++ b/libavcodec/cinepakenc.c
@@ -705,7 +705,6 @@ static int quantize(CinepakEncContext *s, int h, uint8_t *data[4],
     int entry_size      = s->pix_fmt == AV_PIX_FMT_RGB24 ? 6 : 4;
     int *codebook       = v1mode ? info->v1_codebook : info->v4_codebook;
     int size            = v1mode ? info->v1_size : info->v4_size;
-    int64_t total_error = 0;
     uint8_t vq_pict_buf[(MB_AREA * 3) / 2];
     uint8_t     *sub_data[4],     *vq_data[4];
     int      sub_linesize[4],  vq_linesize[4];
@@ -795,7 +794,6 @@ static int quantize(CinepakEncContext *s, int h, uint8_t *data[4],
 
                 mb->v1_error = compute_mb_distortion(s, sub_data, sub_linesize,
                                                      vq_data, vq_linesize);
-                total_error += mb->v1_error;
             } else {
                 for (k = 0; k < 4; k++)
                     mb->v4_vector[k] = s->codebook_closest[i + k];
@@ -805,7 +803,6 @@ static int quantize(CinepakEncContext *s, int h, uint8_t *data[4],
 
                 mb->v4_error = compute_mb_distortion(s, sub_data, sub_linesize,
                                                      vq_data, vq_linesize);
-                total_error += mb->v4_error;
             }
             i += v1mode ? 1 : 4;
         }
diff --git a/libavcodec/error_resilience.c b/libavcodec/error_resilience.c
index f13be7b918..91cd8a4444 100644
--- a/libavcodec/error_resilience.c
+++ b/libavcodec/error_resilience.c
@@ -476,8 +476,6 @@ static void guess_mv(ERContext *s)
         none_left = 1;
         changed   = 1;
         for (pass = 0; (changed || pass < 2) && pass < 10; pass++) {
-            int score_sum = 0;
-
             changed = 0;
             for (blocklist_index = 0; blocklist_index < blocklist_length; blocklist_index++) {
                 const int mb_x = blocklist[blocklist_index][0];
@@ -668,7 +666,6 @@ skip_mean_and_median:
                         best_pred  = j;
                     }
                 }
-                score_sum += best_score;
                 s->mv[0][0][0] = mv_predictor[best_pred][0];
                 s->mv[0][0][1] = mv_predictor[best_pred][1];
 
diff --git a/libavcodec/imc.c b/libavcodec/imc.c
index cbe3edeeec..116c273ba0 100644
--- a/libavcodec/imc.c
+++ b/libavcodec/imc.c
@@ -829,7 +829,7 @@ static void imc_get_coeffs(AVCodecContext *avctx,
 static void imc_refine_bit_allocation(IMCContext *q, IMCChannel *chctx)
 {
     int i, j;
-    int bits, summer;
+    int summer;
 
     for (i = 0; i < BANDS; i++) {
         chctx->sumLenArr[i]   = 0;
@@ -853,7 +853,7 @@ static void imc_refine_bit_allocation(IMCContext *q, IMCChannel *chctx)
     }
 
     /* calculate bits left, bits needed and adjust bit allocation */
-    bits = summer = 0;
+    summer = 0;
 
     for (i = 0; i < BANDS; i++) {
         if (chctx->bandFlagsBuf[i]) {
@@ -863,7 +863,6 @@ static void imc_refine_bit_allocation(IMCContext *q, IMCChannel *chctx)
                     chctx->CWlengthT[j] = 0;
                 }
             }
-            bits   += chctx->skipFlagBits[i];
             summer -= chctx->skipFlagBits[i];
         }
     }
diff --git a/libavcodec/j2kenc.c b/libavcodec/j2kenc.c
index fa6fc208f5..c06752f43a 100644
--- a/libavcodec/j2kenc.c
+++ b/libavcodec/j2kenc.c
@@ -1272,7 +1272,6 @@ static void makelayers(Jpeg2000EncoderContext *s, Jpeg2000Tile *tile)
     double min = DBL_MAX;
     double max = 0;
     double thresh;
-    int tile_disto = 0;
 
     Jpeg2000CodingStyle *codsty = &s->codsty;
 
@@ -1294,7 +1293,6 @@ static void makelayers(Jpeg2000EncoderContext *s, Jpeg2000Tile *tile)
                             int dr;
                             double dd, drslope;
 
-                            tile_disto += pass->disto;
                             if (passno == 0) {
                                 dr = (int32_t)pass->rate;
                                 dd = pass->disto;
diff --git a/libavcodec/roqvideoenc.c b/libavcodec/roqvideoenc.c
index 684dbe0af5..95012f7c1a 100644
--- a/libavcodec/roqvideoenc.c
+++ b/libavcodec/roqvideoenc.c
@@ -666,7 +666,6 @@ static void reconstruct_and_encode_image(RoqEncContext *enc,
     int i, j, k;
     int x, y;
     int subX, subY;
-    int dist=0;
 
     roq_qcell *qcell;
     CelEvaluation *eval;
@@ -692,7 +691,6 @@ static void reconstruct_and_encode_image(RoqEncContext *enc,
 
         x = eval->sourceX;
         y = eval->sourceY;
-        dist += eval->eval_dist[eval->best_coding];
 
         switch (eval->best_coding) {
         case RoQ_ID_MOT:
diff --git a/libavfilter/af_astats.c b/libavfilter/af_astats.c
index 0621d18b35..3955a4e8e9 100644
--- a/libavfilter/af_astats.c
+++ b/libavfilter/af_astats.c
@@ -403,7 +403,6 @@ static void set_metadata(AudioStatsContext *s, AVDictionary **metadata)
            max_sigma_x = 0,
            diff1_sum = 0,
            diff1_sum_x2 = 0,
-           sigma_x = 0,
            sigma_x2 = 0,
            noise_floor = 0,
            entropy = 0,
@@ -428,7 +427,6 @@ static void set_metadata(AudioStatsContext *s, AVDictionary **metadata)
         diff1_sum_x2 += p->diff1_sum_x2;
         min_sigma_x2 = FFMIN(min_sigma_x2, p->min_sigma_x2);
         max_sigma_x2 = FFMAX(max_sigma_x2, p->max_sigma_x2);
-        sigma_x += p->sigma_x;
         sigma_x2 += p->sigma_x2;
         noise_floor = FFMAX(noise_floor, p->noise_floor);
         noise_floor_count += p->noise_floor_count;
@@ -659,7 +657,6 @@ static void print_stats(AVFilterContext *ctx)
            max_sigma_x = 0,
            diff1_sum_x2 = 0,
            diff1_sum = 0,
-           sigma_x = 0,
            sigma_x2 = 0,
            noise_floor = 0,
            entropy = 0,
@@ -684,7 +681,6 @@ static void print_stats(AVFilterContext *ctx)
         diff1_sum += p->diff1_sum;
         min_sigma_x2 = FFMIN(min_sigma_x2, p->min_sigma_x2);
         max_sigma_x2 = FFMAX(max_sigma_x2, p->max_sigma_x2);
-        sigma_x += p->sigma_x;
         sigma_x2 += p->sigma_x2;
         noise_floor = FFMAX(noise_floor, p->noise_floor);
         p->entropy = calc_entropy(s, p);
diff --git a/libswresample/tests/swresample.c b/libswresample/tests/swresample.c
index 53896585e2..14a8f14f3e 100644
--- a/libswresample/tests/swresample.c
+++ b/libswresample/tests/swresample.c
@@ -362,16 +362,12 @@ int main(int argc, char **argv){
 
         for(ch=0; ch<in_ch_count; ch++){
             double sse, maxdiff=0;
-            double sum_a= 0;
-            double sum_b= 0;
             double sum_aa= 0;
             double sum_bb= 0;
             double sum_ab= 0;
             for(i=0; i<out_count; i++){
                 double a= get(ain , ch, i, in_ch_count, in_sample_fmt);
                 double b= get(aout, ch, i, in_ch_count, in_sample_fmt);
-                sum_a += a;
-                sum_b += b;
                 sum_aa+= a*a;
                 sum_bb+= b*b;
                 sum_ab+= a*b;
@@ -392,16 +388,12 @@ int main(int argc, char **argv){
         if(flush_count){
             for(ch=0; ch<in_ch_count; ch++){
                 double sse, maxdiff=0;
-                double sum_a= 0;
-                double sum_b= 0;
                 double sum_aa= 0;
                 double sum_bb= 0;
                 double sum_ab= 0;
                 for(i=0; i<flush_count; i++){
                     double a= get(ain , ch, i+out_count, in_ch_count, in_sample_fmt);
                     double b= get(aout, ch, i, in_ch_count, in_sample_fmt);
-                    sum_a += a;
-                    sum_b += b;
                     sum_aa+= a*a;
                     sum_bb+= b*b;
                     sum_ab+= a*b;