aacenc: remove redundant argument from coder functions

This commit removes a redundant argument from the functions in aaccoder.
The argument lambda was redundant as it was just a copy of s->lambda,
to which all functions have access to anyway. This cleans up the function
pointers a bit which is helpful as there are a lot of other search_for_*
functions under development and with them populated it gets messy.

Reviewed-by: Claudio Freire <klaussfreire@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavcodec/aaccoder.c

@@ -1177,10 +1177,10 @@ static void search_for_quantizers_fast(AVCodecContext *avctx, AACEncContext *s,
                 sce->sf_idx[(w+w2)*16+g] = sce->sf_idx[w*16+g];
 }
 
-static void search_for_pns(AACEncContext *s, AVCodecContext *avctx, SingleChannelElement *sce,
-                           const float lambda)
+static void search_for_pns(AACEncContext *s, AVCodecContext *avctx, SingleChannelElement *sce)
 {
     int start = 0, w, w2, g;
+    const float lambda = s->lambda;
     const float freq_mult = avctx->sample_rate/(1024.0f/sce->ics.num_windows)/2.0f;
     const float spread_threshold = NOISE_SPREAD_THRESHOLD*(lambda/120.f);
     const float thr_mult = NOISE_LAMBDA_NUMERATOR/lambda;
@@ -1214,8 +1214,7 @@ static void search_for_pns(AACEncContext *s, AVCodecContext *avctx, SingleChanne
     }
 }
 
-static void search_for_is(AACEncContext *s, AVCodecContext *avctx, ChannelElement *cpe,
-                          const float lambda)
+static void search_for_is(AACEncContext *s, AVCodecContext *avctx, ChannelElement *cpe)
 {
     float IS[128];
     float *L34  = s->scoefs + 128*0, *R34  = s->scoefs + 128*1;
@@ -1224,6 +1223,7 @@ static void search_for_is(AACEncContext *s, AVCodecContext *avctx, ChannelElemen
     SingleChannelElement *sce1 = &cpe->ch[1];
     int start = 0, count = 0, i, w, w2, g;
     const float freq_mult = avctx->sample_rate/(1024.0f/sce0->ics.num_windows)/2.0f;
+    const float lambda = s->lambda;
 
     for (w = 0; w < 128; w++)
         if (sce1->band_type[w] >= INTENSITY_BT2)
@@ -1312,12 +1312,12 @@ static void search_for_is(AACEncContext *s, AVCodecContext *avctx, ChannelElemen
     cpe->is_mode = !!count;
 }
 
-static void search_for_ms(AACEncContext *s, ChannelElement *cpe,
-                          const float lambda)
+static void search_for_ms(AACEncContext *s, ChannelElement *cpe)
 {
     int start = 0, i, w, w2, g;
     float M[128], S[128];
     float *L34 = s->scoefs, *R34 = s->scoefs + 128, *M34 = s->scoefs + 128*2, *S34 = s->scoefs + 128*3;
+    const float lambda = s->lambda;
     SingleChannelElement *sce0 = &cpe->ch[0];
     SingleChannelElement *sce1 = &cpe->ch[1];
     if (!cpe->common_window)

libavcodec/aacenc.c

@@ -696,7 +696,7 @@ static int aac_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
             if (s->options.pns && s->coder->search_for_pns) {
                 for (ch = 0; ch < chans; ch++) {
                     s->cur_channel = start_ch + ch;
-                    s->coder->search_for_pns(s, avctx, &cpe->ch[ch], s->lambda);
+                    s->coder->search_for_pns(s, avctx, &cpe->ch[ch]);
                 }
             }
             s->cur_channel = start_ch;
@@ -707,11 +707,11 @@ static int aac_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
                         for (g = 0;  g < ics->num_swb; g++)
                             cpe->ms_mask[w*16+g] = 1;
                 } else if (s->coder->search_for_ms) {
-                    s->coder->search_for_ms(s, cpe, s->lambda);
+                    s->coder->search_for_ms(s, cpe);
                 }
             }
             if (chans > 1 && s->options.intensity_stereo && s->coder->search_for_is) {
-                s->coder->search_for_is(s, avctx, cpe, s->lambda);
+                s->coder->search_for_is(s, avctx, cpe);
                 if (cpe->is_mode) is_mode = 1;
             }
             if (s->coder->set_special_band_scalefactors)

libavcodec/aacenc.h

@@ -56,9 +56,9 @@ typedef struct AACCoefficientsEncoder {
     void (*quantize_and_encode_band)(struct AACEncContext *s, PutBitContext *pb, const float *in, int size,
                                      int scale_idx, int cb, const float lambda, int rtz);
     void (*set_special_band_scalefactors)(struct AACEncContext *s, SingleChannelElement *sce);
-    void (*search_for_pns)(struct AACEncContext *s, AVCodecContext *avctx, SingleChannelElement *sce, const float lambda);
-    void (*search_for_ms)(struct AACEncContext *s, ChannelElement *cpe, const float lambda);
-    void (*search_for_is)(struct AACEncContext *s, AVCodecContext *avctx, ChannelElement *cpe, const float lambda);
+    void (*search_for_pns)(struct AACEncContext *s, AVCodecContext *avctx, SingleChannelElement *sce);
+    void (*search_for_ms)(struct AACEncContext *s, ChannelElement *cpe);
+    void (*search_for_is)(struct AACEncContext *s, AVCodecContext *avctx, ChannelElement *cpe);
 } AACCoefficientsEncoder;
 
 extern AACCoefficientsEncoder ff_aac_coders[];