diff options
Diffstat (limited to 'libavcodec/ac3dec.c')
| -rw-r--r-- | libavcodec/ac3dec.c | 13 |
1 files changed, 2 insertions, 11 deletions
diff --git a/libavcodec/ac3dec.c b/libavcodec/ac3dec.c index a1e731dcf9..2f9bc261bd 100644 --- a/libavcodec/ac3dec.c +++ b/libavcodec/ac3dec.c @@ -196,13 +196,7 @@ static av_cold int ac3_decode_init(AVCodecContext *avctx) av_lfg_init(&s->dith_state, 0); /* set bias values for float to int16 conversion */ - if(s->dsp.float_to_int16_interleave == ff_float_to_int16_interleave_c) { - s->add_bias = 385.0f; - s->mul_bias = 1.0f; - } else { - s->add_bias = 0.0f; s->mul_bias = 32767.0f; - } /* allow downmixing to stereo or mono */ if (avctx->channels > 0 && avctx->request_channels > 0 && @@ -626,9 +620,6 @@ static void do_rematrixing(AC3DecodeContext *s) static inline void do_imdct(AC3DecodeContext *s, int channels) { int ch; - float add_bias = s->add_bias; - if(s->out_channels==1 && channels>1) - add_bias *= LEVEL_MINUS_3DB; // compensate for the gain in downmix for (ch=1; ch<=channels; ch++) { if (s->block_switch[ch]) { @@ -637,13 +628,13 @@ static inline void do_imdct(AC3DecodeContext *s, int channels) for(i=0; i<128; i++) x[i] = s->transform_coeffs[ch][2*i]; ff_imdct_half(&s->imdct_256, s->tmp_output, x); - s->dsp.vector_fmul_window(s->output[ch-1], s->delay[ch-1], s->tmp_output, s->window, add_bias, 128); + s->dsp.vector_fmul_window(s->output[ch-1], s->delay[ch-1], s->tmp_output, s->window, 0, 128); for(i=0; i<128; i++) x[i] = s->transform_coeffs[ch][2*i+1]; ff_imdct_half(&s->imdct_256, s->delay[ch-1], x); } else { ff_imdct_half(&s->imdct_512, s->tmp_output, s->transform_coeffs[ch]); - s->dsp.vector_fmul_window(s->output[ch-1], s->delay[ch-1], s->tmp_output, s->window, add_bias, 128); + s->dsp.vector_fmul_window(s->output[ch-1], s->delay[ch-1], s->tmp_output, s->window, 0, 128); memcpy(s->delay[ch-1], s->tmp_output+128, 128*sizeof(float)); } } |