Remove unused variables

ffmpeg.c

@@ -1117,7 +1117,7 @@ static void do_video_out(AVFormatContext *s,
                          int *frame_size)
 {
     int nb_frames, i, ret, resample_changed;
-    AVFrame *final_picture, *formatted_picture, *resampling_dst;
+    AVFrame *final_picture, *formatted_picture;
     AVCodecContext *enc, *dec;
     double sync_ipts;
 
@@ -1162,7 +1162,6 @@ static void do_video_out(AVFormatContext *s,
 
     formatted_picture = in_picture;
     final_picture = formatted_picture;
-    resampling_dst = &ost->pict_tmp;
 
     resample_changed = ost->resample_width   != dec->width  ||
                        ost->resample_height  != dec->height ||
@@ -1198,7 +1197,7 @@ static void do_video_out(AVFormatContext *s,
             }
         }
         sws_scale(ost->img_resample_ctx, formatted_picture->data, formatted_picture->linesize,
-              0, ost->resample_height, resampling_dst->data, resampling_dst->linesize);
+              0, ost->resample_height, final_picture->data, final_picture->linesize);
     }
 #endif
 
@@ -3617,7 +3616,6 @@ static void new_audio_stream(AVFormatContext *oc, int file_idx)
 static void new_data_stream(AVFormatContext *oc, int file_idx)
 {
     AVStream *st;
-    AVOutputStream *ost;
     AVCodec *codec=NULL;
     AVCodecContext *data_enc;
 
@@ -3626,7 +3624,7 @@ static void new_data_stream(AVFormatContext *oc, int file_idx)
         fprintf(stderr, "Could not alloc stream\n");
         ffmpeg_exit(1);
     }
-    ost = new_output_stream(oc, file_idx);
+    new_output_stream(oc, file_idx);
     data_enc = st->codec;
     output_codecs = grow_array(output_codecs, sizeof(*output_codecs), &nb_output_codecs, nb_output_codecs + 1);
     if (!data_stream_copy) {

libavcodec/a64multienc.c

@@ -252,7 +252,6 @@ static int a64multi_encode_frame(AVCodecContext *avctx, unsigned char *buf,
     int b_width;
 
     int req_size;
-    int num_frames   = c->mc_lifetime;
 
     int *charmap     = c->mc_charmap;
     uint8_t *colram  = c->mc_colram;
@@ -280,7 +279,6 @@ static int a64multi_encode_frame(AVCodecContext *avctx, unsigned char *buf,
         if (!c->mc_lifetime) return 0;
         /* no more frames in queue, prepare to flush remaining frames */
         if (!c->mc_frame_counter) {
-            num_frames = c->mc_lifetime;
             c->mc_lifetime = 0;
         }
         /* still frames in queue so limit lifetime to remaining frames */

libavcodec/aaccoder.c

@@ -311,7 +311,7 @@ static void encode_window_bands_info(AACEncContext *s, SingleChannelElement *sce
                                      int win, int group_len, const float lambda)
 {
     BandCodingPath path[120][12];
-    int w, swb, cb, start, start2, size;
+    int w, swb, cb, start, size;
     int i, j;
     const int max_sfb  = sce->ics.max_sfb;
     const int run_bits = sce->ics.num_windows == 1 ? 5 : 3;
@@ -329,7 +329,6 @@ static void encode_window_bands_info(AACEncContext *s, SingleChannelElement *sce
         path[0][cb].run      = 0;
     }
     for (swb = 0; swb < max_sfb; swb++) {
-        start2 = start;
         size = sce->ics.swb_sizes[swb];
         if (sce->zeroes[win*16 + swb]) {
             for (cb = 0; cb < 12; cb++) {
@@ -413,7 +412,7 @@ static void codebook_trellis_rate(AACEncContext *s, SingleChannelElement *sce,
                                   int win, int group_len, const float lambda)
 {
     BandCodingPath path[120][12];
-    int w, swb, cb, start, start2, size;
+    int w, swb, cb, start, size;
     int i, j;
     const int max_sfb  = sce->ics.max_sfb;
     const int run_bits = sce->ics.num_windows == 1 ? 5 : 3;
@@ -431,7 +430,6 @@ static void codebook_trellis_rate(AACEncContext *s, SingleChannelElement *sce,
         path[0][cb].run      = 0;
     }
     for (swb = 0; swb < max_sfb; swb++) {
-        start2 = start;
         size = sce->ics.swb_sizes[swb];
         if (sce->zeroes[win*16 + swb]) {
             for (cb = 0; cb < 12; cb++) {
@@ -1006,12 +1004,11 @@ static void search_for_quantizers_fast(AVCodecContext *avctx, AACEncContext *s,
                                        SingleChannelElement *sce,
                                        const float lambda)
 {
-    int start = 0, i, w, w2, g;
+    int i, w, w2, g;
     int minq = 255;
 
     memset(sce->sf_idx, 0, sizeof(sce->sf_idx));
     for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) {
-        start = w*128;
         for (g = 0; g < sce->ics.num_swb; g++) {
             for (w2 = 0; w2 < sce->ics.group_len[w]; w2++) {
                 FFPsyBand *band = &s->psy.psy_bands[s->cur_channel*PSY_MAX_BANDS+(w+w2)*16+g];

libavcodec/celp_filters.c

@@ -109,7 +109,7 @@ void ff_celp_lp_synthesis_filterf(float *out, const float *filter_coeffs,
     old_out2 = out[-2];
     old_out3 = out[-1];
     for (n = 0; n <= buffer_length - 4; n+=4) {
-        float tmp0,tmp1,tmp2,tmp3;
+        float tmp0,tmp1,tmp2;
         float val;
 
         out0 = in[0];
@@ -160,7 +160,6 @@ void ff_celp_lp_synthesis_filterf(float *out, const float *filter_coeffs,
         tmp0 = out0;
         tmp1 = out1;
         tmp2 = out2;
-        tmp3 = out3;
 
         out3 -= a * tmp2;
         out2 -= a * tmp1;

libavcodec/dca.c

@@ -1535,8 +1535,6 @@ static void dca_exss_parse_header(DCAContext *s)
 {
     int ss_index;
     int blownup;
-    int header_size;
-    int hd_size;
     int num_audiop = 1;
     int num_assets = 1;
     int active_ss_mask[8];
@@ -1549,8 +1547,8 @@ static void dca_exss_parse_header(DCAContext *s)
     ss_index = get_bits(&s->gb, 2);
 
     blownup = get_bits1(&s->gb);
-    header_size = get_bits(&s->gb, 8 + 4 * blownup) + 1;
-    hd_size = get_bits_long(&s->gb, 16 + 4 * blownup) + 1;
+    skip_bits(&s->gb, 8 + 4 * blownup); // header_size
+    skip_bits(&s->gb, 16 + 4 * blownup); // hd_size
 
     s->static_fields = get_bits1(&s->gb);
     if (s->static_fields) {

libavcodec/dirac.c

@@ -245,11 +245,11 @@ static int parse_source_parameters(AVCodecContext *avctx, GetBitContext *gb,
 int ff_dirac_parse_sequence_header(AVCodecContext *avctx, GetBitContext *gb,
                                    dirac_source_params *source)
 {
-    unsigned version_major, version_minor;
+    unsigned version_major;
     unsigned video_format, picture_coding_mode;
 
     version_major  = svq3_get_ue_golomb(gb);
-    version_minor  = svq3_get_ue_golomb(gb);
+    svq3_get_ue_golomb(gb); /* version_minor */
     avctx->profile = svq3_get_ue_golomb(gb);
     avctx->level   = svq3_get_ue_golomb(gb);
     video_format   = svq3_get_ue_golomb(gb);

libavcodec/ituh263dec.c

@@ -152,7 +152,7 @@ int ff_h263_decode_mba(MpegEncContext *s)
  */
 static int h263_decode_gob_header(MpegEncContext *s)
 {
-    unsigned int val, gfid, gob_number;
+    unsigned int val, gob_number;
     int left;
 
     /* Check for GOB Start Code */
@@ -183,12 +183,12 @@ static int h263_decode_gob_header(MpegEncContext *s)
         s->qscale = get_bits(&s->gb, 5); /* SQUANT */
         if(get_bits1(&s->gb)==0)
             return -1;
-        gfid = get_bits(&s->gb, 2); /* GFID */
+        skip_bits(&s->gb, 2); /* GFID */
     }else{
         gob_number = get_bits(&s->gb, 5); /* GN */
         s->mb_x= 0;
         s->mb_y= s->gob_index* gob_number;
-        gfid = get_bits(&s->gb, 2); /* GFID */
+        skip_bits(&s->gb, 2); /* GFID */
         s->qscale = get_bits(&s->gb, 5); /* GQUANT */
     }
 

libavcodec/mpeg12.c

@@ -2128,14 +2128,13 @@ static void mpeg_decode_gop(AVCodecContext *avctx,
     Mpeg1Context *s1 = avctx->priv_data;
     MpegEncContext *s = &s1->mpeg_enc_ctx;
 
-    int drop_frame_flag;
     int time_code_hours, time_code_minutes;
     int time_code_seconds, time_code_pictures;
     int broken_link;
 
     init_get_bits(&s->gb, buf, buf_size*8);
 
-    drop_frame_flag = get_bits1(&s->gb);
+    skip_bits1(&s->gb); /* drop_frame_flag */
 
     time_code_hours=get_bits(&s->gb,5);
     time_code_minutes = get_bits(&s->gb,6);

libavcodec/mpeg12enc.c

@@ -761,10 +761,9 @@ void ff_mpeg1_encode_init(MpegEncContext *s)
 
                 if(mv==0) len= ff_mpeg12_mbMotionVectorTable[0][1];
                 else{
-                    int val, bit_size, range, code;
+                    int val, bit_size, code;
 
                     bit_size = f_code - 1;
-                    range = 1 << bit_size;
 
                     val=mv;
                     if (val < 0)

libavcodec/mpeg4videodec.c

@@ -397,14 +397,13 @@ int mpeg4_decode_video_packet_header(MpegEncContext *s)
         header_extension= get_bits1(&s->gb);
     }
     if(header_extension){
-        int time_increment;
         int time_incr=0;
 
         while (get_bits1(&s->gb) != 0)
             time_incr++;
 
         check_marker(&s->gb, "before time_increment in video packed header");
-        time_increment= get_bits(&s->gb, s->time_increment_bits);
+        skip_bits(&s->gb, s->time_increment_bits); /* time_increment */
         check_marker(&s->gb, "before vop_coding_type in video packed header");
 
         skip_bits(&s->gb, 2); /* vop coding type */
@@ -1801,16 +1800,14 @@ no_cplx_est:
 
         if (s->scalability) {
             GetBitContext bak= *gb;
-            int ref_layer_id;
-            int ref_layer_sampling_dir;
             int h_sampling_factor_n;
             int h_sampling_factor_m;
             int v_sampling_factor_n;
             int v_sampling_factor_m;
 
             s->hierachy_type= get_bits1(gb);
-            ref_layer_id= get_bits(gb, 4);
-            ref_layer_sampling_dir= get_bits1(gb);
+            skip_bits(gb, 4);  /* ref_layer_id */
+            skip_bits1(gb);    /* ref_layer_sampling_dir */
             h_sampling_factor_n= get_bits(gb, 5);
             h_sampling_factor_m= get_bits(gb, 5);
             v_sampling_factor_n= get_bits(gb, 5);
@@ -1989,15 +1986,13 @@ static int decode_vop_header(MpegEncContext *s, GetBitContext *gb){
 
      if (s->shape != RECT_SHAPE) {
          if (s->vol_sprite_usage != 1 || s->pict_type != AV_PICTURE_TYPE_I) {
-             int width, height, hor_spat_ref, ver_spat_ref;
-
-             width = get_bits(gb, 13);
+             skip_bits(gb, 13); /* width */
              skip_bits1(gb);   /* marker */
-             height = get_bits(gb, 13);
+             skip_bits(gb, 13); /* height */
              skip_bits1(gb);   /* marker */
-             hor_spat_ref = get_bits(gb, 13); /* hor_spat_ref */
+             skip_bits(gb, 13); /* hor_spat_ref */
              skip_bits1(gb);   /* marker */
-             ver_spat_ref = get_bits(gb, 13); /* ver_spat_ref */
+             skip_bits(gb, 13); /* ver_spat_ref */
          }
          skip_bits1(gb); /* change_CR_disable */