diff options
Diffstat (limited to 'ffmpeg/libswresample/dither_template.c')
| -rw-r--r-- | ffmpeg/libswresample/dither_template.c | 67 |
1 files changed, 0 insertions, 67 deletions
diff --git a/ffmpeg/libswresample/dither_template.c b/ffmpeg/libswresample/dither_template.c deleted file mode 100644 index 4af7312..0000000 --- a/ffmpeg/libswresample/dither_template.c +++ /dev/null @@ -1,67 +0,0 @@ - -#if defined(TEMPLATE_DITHER_DBL) -# define RENAME(N) N ## _double -# define DELEM double -# define CLIP(v) - -#elif defined(TEMPLATE_DITHER_FLT) -# define RENAME(N) N ## _float -# define DELEM float -# define CLIP(v) - -#elif defined(TEMPLATE_DITHER_S32) -# define RENAME(N) N ## _int32 -# define DELEM int32_t -# define CLIP(v) v = FFMAX(FFMIN(v, INT32_MAX), INT32_MIN) - -#elif defined(TEMPLATE_DITHER_S16) -# define RENAME(N) N ## _int16 -# define DELEM int16_t -# define CLIP(v) v = FFMAX(FFMIN(v, INT16_MAX), INT16_MIN) - -#else -ERROR -#endif - -void RENAME(swri_noise_shaping)(SwrContext *s, AudioData *dsts, const AudioData *srcs, const AudioData *noises, int count){ - int pos = s->dither.ns_pos; - int i, j, ch; - int taps = s->dither.ns_taps; - float S = s->dither.ns_scale; - float S_1 = s->dither.ns_scale_1; - - av_assert2((taps&3) != 2); - av_assert2((taps&3) != 3 || s->dither.ns_coeffs[taps] == 0); - - for (ch=0; ch<srcs->ch_count; ch++) { - const float *noise = ((const float *)noises->ch[ch]) + s->dither.noise_pos; - const DELEM *src = (const DELEM*)srcs->ch[ch]; - DELEM *dst = (DELEM*)dsts->ch[ch]; - float *ns_errors = s->dither.ns_errors[ch]; - const float *ns_coeffs = s->dither.ns_coeffs; - pos = s->dither.ns_pos; - for (i=0; i<count; i++) { - double d1, d = src[i]*S_1; - for(j=0; j<taps-2; j+=4) { - d -= ns_coeffs[j ] * ns_errors[pos + j ] - +ns_coeffs[j + 1] * ns_errors[pos + j + 1] - +ns_coeffs[j + 2] * ns_errors[pos + j + 2] - +ns_coeffs[j + 3] * ns_errors[pos + j + 3]; - } - if(j < taps) - d -= ns_coeffs[j] * ns_errors[pos + j]; - pos = pos ? pos - 1 : taps - 1; - d1 = rint(d + noise[i]); - ns_errors[pos + taps] = ns_errors[pos] = d1 - d; - d1 *= S; - CLIP(d1); - dst[i] = d1; - } - } - - s->dither.ns_pos = pos; -} - -#undef RENAME -#undef DELEM -#undef CLIP |
