diff options
Diffstat (limited to 'libAACdec/src/usacdec_lpd.cpp')
| -rw-r--r-- | libAACdec/src/usacdec_lpd.cpp | 26 |
1 files changed, 16 insertions, 10 deletions
diff --git a/libAACdec/src/usacdec_lpd.cpp b/libAACdec/src/usacdec_lpd.cpp index e0a2631..de0c2de 100644 --- a/libAACdec/src/usacdec_lpd.cpp +++ b/libAACdec/src/usacdec_lpd.cpp @@ -1,7 +1,7 @@ /* ----------------------------------------------------------------------------- Software License for The Fraunhofer FDK AAC Codec Library for Android -© Copyright 1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten +© Copyright 1995 - 2019 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. All rights reserved. 1. INTRODUCTION @@ -130,9 +130,10 @@ void filtLP(const FIXP_DBL *syn, FIXP_PCM *syn_out, FIXP_DBL *noise, for (i = 0; i < stop; i++) { tmp = fMultDiv2(noise[i], filt[0]); // Filt in Q-1.16 for (j = 1; j <= len; j++) { - tmp += fMultDiv2((noise[i - j] + noise[i + j]), filt[j]); + tmp += fMult((noise[i - j] >> 1) + (noise[i + j] >> 1), filt[j]); } - syn_out[i] = (FIXP_PCM)(IMDCT_SCALE(syn[i] - tmp)); + syn_out[i] = (FIXP_PCM)(SATURATE_SHIFT( + (syn[i] >> 1) - (tmp >> 1), (MDCT_OUTPUT_SCALE - 1), PCM_OUT_BITS)); } } @@ -335,17 +336,22 @@ void bass_pf_1sf_delay( { for (i = 0; i < lg; i++) { - /* scaled with SF_SYNTH + gain_sf + 1 */ + /* scaled with SF_SYNTH + gain_sf + 1; composition of scalefactor 2: + * one additional shift of syn values + fMult => fMultDiv2 */ noise_in[i] = - (fMult(gainSGL, syn[i + i_subfr] - (syn[i + i_subfr - T] >> 1) - - (syn[i + i_subfr + T] >> 1))) >> - s1; + scaleValue(fMultDiv2(gainSGL, (syn[i + i_subfr] >> 1) - + (syn[i + i_subfr - T] >> 2) - + (syn[i + i_subfr + T] >> 2)), + 2 - s1); } for (i = lg; i < L_SUBFR; i++) { - /* scaled with SF_SYNTH + gain_sf + 1 */ + /* scaled with SF_SYNTH + gain_sf + 1; composition of scalefactor 2: + * one additional shift of syn values + fMult => fMultDiv2 */ noise_in[i] = - (fMult(gainSGL, syn[i + i_subfr] - syn[i + i_subfr - T])) >> s1; + scaleValue(fMultDiv2(gainSGL, (syn[i + i_subfr] >> 1) - + (syn[i + i_subfr - T] >> 1)), + 2 - s1); } } } else { @@ -1222,7 +1228,7 @@ AAC_DECODER_ERROR CLpdChannelStream_Read( (INT)(samplingRate * PIT_MIN_12k8 + (FSCALE_DENOM / 2)) / FSCALE_DENOM - (INT)PIT_MIN_12k8; - if ((samplingRate < 6000) || (samplingRate > 24000)) { + if ((samplingRate < FAC_FSCALE_MIN) || (samplingRate > FAC_FSCALE_MAX)) { error = AAC_DEC_PARSE_ERROR; goto bail; } |