This commit only changes the coding style to a saner way of accessing coefficients (makes more sense to get the memory address of a coefficients and start from there rather than adding arbitrary numbers to offset a pointer). Some compilers might detect an out of bounds access easier. Also the way M/S and IS coefficients are calculated has been changed, but should still have the same result (with the exception that IS now applies from the normal coefficients rather than the pristine ones, this is needed for upcoming commits).
Showing the changes to libavcodec/aaccoder.c (1 of 2 files). Show all
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| @@ -330,8 +330,8 @@ static void encode_window_bands_info(AACEncContext *s, SingleChannelElement *sce · 329 unmodified lines | ||
| 330 | 330 | } |
| 331 | 331 | for (w = 0; w < group_len; w++) { |
| 332 | 332 | FFPsyBand *band = &s->psy.ch[s->cur_channel].psy_bands[(win+w)*16+swb]; |
| 333 | − rd += quantize_band_cost(s, sce->coeffs + start + w*128, | |
| 334 | − s->scoefs + start + w*128, size, | |
| 333 | + rd += quantize_band_cost(s, &sce->coeffs[start + w*128], | |
| 334 | + &s->scoefs[start + w*128], size, | |
| 335 | 335 | sce->sf_idx[(win+w)*16+swb], aac_cb_out_map[cb], |
| 336 | 336 | lambda / band->threshold, INFINITY, NULL, 0); |
| 337 | 337 | } |
| @@ -461,8 +461,8 @@ static void codebook_trellis_rate(AACEncContext *s, SingleChannelElement *sce, · 123 unmodified lines | ||
| 461 | 461 | continue; |
| 462 | 462 | } |
| 463 | 463 | for (w = 0; w < group_len; w++) { |
| 464 | − bits += quantize_band_cost(s, sce->coeffs + start + w*128, | |
| 465 | − s->scoefs + start + w*128, size, | |
| 464 | + bits += quantize_band_cost(s, &sce->coeffs[start + w*128], | |
| 465 | + &s->scoefs[start + w*128], size, | |
| 466 | 466 | sce->sf_idx[win*16+swb], |
| 467 | 467 | aac_cb_out_map[cb], |
| 468 | 468 | 0, INFINITY, NULL, 0); |
| @@ -636,7 +636,7 @@ static void search_for_quantizers_anmr(AVCodecContext *avctx, AACEncContext *s, · 167 unmodified lines | ||
| 636 | 636 | for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) { |
| 637 | 637 | start = w*128; |
| 638 | 638 | for (g = 0; g < sce->ics.num_swb; g++) { |
| 639 | − const float *coefs = sce->coeffs + start; | |
| 639 | + const float *coefs = &sce->coeffs[start]; | |
| 640 | 640 | float qmin, qmax; |
| 641 | 641 | int nz = 0; |
| 642 | 642 | |
| @@ -800,8 +800,8 @@ static void search_for_quantizers_twoloop(AVCodecContext *avctx, · 157 unmodified lines | ||
| 800 | 800 | for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) { |
| 801 | 801 | start = w*128; |
| 802 | 802 | for (g = 0; g < sce->ics.num_swb; g++) { |
| 803 | − const float *coefs = sce->coeffs + start; | |
| 804 | − const float *scaled = s->scoefs + start; | |
| 803 | + const float *coefs = &sce->coeffs[start]; | |
| 804 | + const float *scaled = &s->scoefs[start]; | |
| 805 | 805 | int bits = 0; |
| 806 | 806 | int cb; |
| 807 | 807 | float dist = 0.0f; |
| @@ -896,7 +896,7 @@ static void search_for_quantizers_faac(AVCodecContext *avctx, AACEncContext *s, · 88 unmodified lines | ||
| 896 | 896 | } |
| 897 | 897 | } else { |
| 898 | 898 | for (w = 0; w < 8; w++) { |
| 899 | − const float *coeffs = sce->coeffs + w*128; | |
| 899 | + const float *coeffs = &sce->coeffs[w*128]; | |
| 900 | 900 | curband = start = 0; |
| 901 | 901 | for (i = 0; i < 128; i++) { |
| 902 | 902 | if (i - start >= sce->ics.swb_sizes[curband]) { |
| @@ -921,7 +921,7 @@ static void search_for_quantizers_faac(AVCodecContext *avctx, AACEncContext *s, · 18 unmodified lines | ||
| 921 | 921 | for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) { |
| 922 | 922 | start = w*128; |
| 923 | 923 | for (g = 0; g < sce->ics.num_swb; g++) { |
| 924 | − float *coefs = sce->coeffs + start; | |
| 924 | + float *coefs = &sce->coeffs[start]; | |
| 925 | 925 | const int size = sce->ics.swb_sizes[g]; |
| 926 | 926 | int start2 = start, end2 = start + size, peakpos = start; |
| 927 | 927 | float maxval = -1, thr = 0.0f, t; |
| @@ -962,8 +962,8 @@ static void search_for_quantizers_faac(AVCodecContext *avctx, AACEncContext *s, · 34 unmodified lines | ||
| 962 | 962 | for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) { |
| 963 | 963 | start = w*128; |
| 964 | 964 | for (g = 0; g < sce->ics.num_swb; g++) { |
| 965 | − const float *coefs = sce->coeffs + start; | |
| 966 | − const float *scaled = s->scoefs + start; | |
| 965 | + const float *coefs = &sce->coeffs[start]; | |
| 966 | + const float *scaled = &s->scoefs[start]; | |
| 967 | 967 | const int size = sce->ics.swb_sizes[g]; |
| 968 | 968 | int scf, prev_scf, step; |
| 969 | 969 | int min_scf = -1, max_scf = 256; |
| @@ -1229,22 +1229,22 @@ static void search_for_ms(AACEncContext *s, ChannelElement *cpe) · 259 unmodified lines | ||
| 1229 | 1229 | float minthr = FFMIN(band0->threshold, band1->threshold); |
| 1230 | 1230 | float maxthr = FFMAX(band0->threshold, band1->threshold); |
| 1231 | 1231 | for (i = 0; i < sce0->ics.swb_sizes[g]; i++) { |
| 1232 | − M[i] = (sce0->pcoeffs[start+(w+w2)*128+i] | |
| 1233 | − + sce1->pcoeffs[start+(w+w2)*128+i]) * 0.5; | |
| 1232 | + M[i] = (sce0->coeffs[start+(w+w2)*128+i] | |
| 1233 | + + sce1->coeffs[start+(w+w2)*128+i]) * 0.5; | |
| 1234 | 1234 | S[i] = M[i] |
| 1235 | − - sce1->pcoeffs[start+(w+w2)*128+i]; | |
| 1235 | + - sce1->coeffs[start+(w+w2)*128+i]; | |
| 1236 | 1236 | } |
| 1237 | 1237 | abs_pow34_v(L34, sce0->coeffs+start+(w+w2)*128, sce0->ics.swb_sizes[g]); |
| 1238 | 1238 | abs_pow34_v(R34, sce1->coeffs+start+(w+w2)*128, sce0->ics.swb_sizes[g]); |
| 1239 | 1239 | abs_pow34_v(M34, M, sce0->ics.swb_sizes[g]); |
| 1240 | 1240 | abs_pow34_v(S34, S, sce0->ics.swb_sizes[g]); |
| 1241 | − dist1 += quantize_band_cost(s, sce0->coeffs + start + (w+w2)*128, | |
| 1241 | + dist1 += quantize_band_cost(s, &sce0->coeffs[start + (w+w2)*128], | |
| 1242 | 1242 | L34, |
| 1243 | 1243 | sce0->ics.swb_sizes[g], |
| 1244 | 1244 | sce0->sf_idx[(w+w2)*16+g], |
| 1245 | 1245 | sce0->band_type[(w+w2)*16+g], |
| 1246 | 1246 | lambda / band0->threshold, INFINITY, NULL, 0); |
| 1247 | − dist1 += quantize_band_cost(s, sce1->coeffs + start + (w+w2)*128, | |
| 1247 | + dist1 += quantize_band_cost(s, &sce1->coeffs[start + (w+w2)*128], | |
| 1248 | 1248 | R34, |
| 1249 | 1249 | sce1->ics.swb_sizes[g], |
| 1250 | 1250 | sce1->sf_idx[(w+w2)*16+g], |