Lines Matching +full:diff +full:- +full:channels
1 /* libSoX effect: splice audio Copyright (c) 2008-9 robs@users.sourceforge.net
15 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 double diff = 0; in difference() local
26 #define _ diff += sqr((double)a[i] - b[i]), ++i; /* Loop optimisation */ in difference()
29 return diff; in difference()
34 sox_sample_t const * f2, uint64_t overlap, uint64_t search, size_t channels) in best_overlap_position() argument
37 double diff, least_diff = difference(f2, f1, (size_t) (channels * overlap)); in best_overlap_position() local
40 diff = difference(f2 + channels * i, f1, (size_t) (channels * overlap)); in best_overlap_position()
41 if (diff < least_diff) in best_overlap_position()
42 least_diff = diff, best_pos = i; in best_overlap_position()
52 char * str; /* Command-line argument to parse for this splice */
67 sox_sample_t * in2, sox_sample_t * output, uint64_t overlap, size_t channels) in splice() argument
69 priv_t * p = (priv_t *)effp->priv; in splice()
72 if (p->fade_type == Cosine_4) { in splice()
77 for (j = 0; j < channels; ++j, ++k) { in splice()
79 output[k] = SOX_ROUND_CLIP_COUNT(d, effp->clips); /* Might clip */ in splice()
83 else if (p->fade_type == Cosine_2) { in splice()
86 double fade_in = .5 - .5 * cos(i * fade_step); in splice()
87 double fade_out = 1 - fade_in; /* constant peak level (`gain') */ in splice()
88 for (j = 0; j < channels; ++j, ++k) { in splice()
90 output[k] = SOX_ROUND_CLIP_COUNT(d, effp->clips); /* Should not clip */ in splice()
98 double fade_out = 1 - fade_in; /* constant peak level (`gain') */ in splice()
99 for (j = 0; j < channels; ++j, ++k) { in splice()
101 output[k] = SOX_ROUND_CLIP_COUNT(d, effp->clips); /* Should not clip */ in splice()
108 sox_sample_t * f, uint64_t overlap, uint64_t search, size_t channels) in do_splice() argument
111 f, f + overlap * channels, overlap, search, channels) : 0; in do_splice()
112 splice(effp, f, f + (overlap + offset) * channels, in do_splice()
113 f + (overlap + offset) * channels, overlap, channels); in do_splice()
119 priv_t * p = (priv_t *)effp->priv; in parse()
124 (effp->in_signal.length != SOX_UNKNOWN_LEN ? in parse()
125 effp->in_signal.length / effp->in_signal.channels : SOX_UNKNOWN_LEN); in parse()
127 p->max_buffer_size = 0; in parse()
128 for (i = 0; i < p->nsplices; ++i) { in parse()
130 p->splices[i].str = lsx_strdup(argv[i]); in parse()
132 p->splices[i].overlap = rate * 0.01 + .5; in parse()
133 p->splices[i].search = p->fade_type == Cosine_4? 0 : p->splices[i].overlap; in parse()
135 next = lsx_parseposition(rate, p->splices[i].str, in parse()
136 argv ? NULL : &p->splices[i].start, last_seen, in_length, '='); in parse()
138 last_seen = p->splices[i].start; in parse()
141 next = lsx_parsesamples(rate, next + 1, &p->splices[i].overlap, 't'); in parse()
143 p->splices[i].overlap *= 2; in parse()
145 next = lsx_parsesamples(rate, next + 1, &p->splices[i].search, 't'); in parse()
147 p->splices[i].search *= 2; in parse()
151 p->splices[i].overlap = max(p->splices[i].overlap + 4, 16); in parse()
152 p->splices[i].overlap &= ~7; /* Make divisible by 8 for loop optimisation */ in parse()
155 if (i > 0 && p->splices[i].start <= p->splices[i-1].start) break; in parse()
156 if (p->splices[i].start < p->splices[i].overlap) break; in parse()
157 p->splices[i].start -= p->splices[i].overlap; in parse()
158 buffer_size = 2 * p->splices[i].overlap + p->splices[i].search; in parse()
159 p->max_buffer_size = max(p->max_buffer_size, buffer_size); in parse()
162 if (i < p->nsplices) in parse()
169 priv_t * p = (priv_t *)effp->priv; in create()
170 --argc, ++argv; in create()
172 if (!strcmp(*argv, "-t")) p->fade_type = Triangular, --argc, ++argv; in create()
173 else if (!strcmp(*argv, "-q")) p->fade_type = Cosine_4 , --argc, ++argv; in create()
174 else if (!strcmp(*argv, "-h")) p->fade_type = Cosine_2 , --argc, ++argv; in create()
176 p->nsplices = argc; in create()
177 p->splices = lsx_calloc(p->nsplices, sizeof(*p->splices)); in create()
183 priv_t * p = (priv_t *)effp->priv; in start()
186 parse(effp, 0, effp->in_signal.rate); /* Re-parse now rate is known */ in start()
187 p->buffer = lsx_calloc(p->max_buffer_size * effp->in_signal.channels, sizeof(*p->buffer)); in start()
188 p->in_pos = p->buffer_pos = p->splices_pos = 0; in start()
189 p->state = p->splices_pos != p->nsplices && p->in_pos == p->splices[p->splices_pos].start; in start()
190 effp->out_signal.length = SOX_UNKNOWN_LEN; /* depends on input data */ in start()
191 for (i = 0; i < p->nsplices; ++i) in start()
192 if (p->splices[i].overlap) { in start()
193 if (p->fade_type == Cosine_4 && effp->in_signal.mult) in start()
194 *effp->in_signal.mult *= pow(.5, .5); in start()
203 priv_t * p = (priv_t *)effp->priv; in flow()
205 *isamp /= effp->in_signal.channels; in flow()
206 *osamp /= effp->in_signal.channels; in flow()
210 if (p->state == 0) { in flow()
211 for (; idone < *isamp && odone < *osamp; ++idone, ++odone, ++p->in_pos) { in flow()
212 if (p->splices_pos != p->nsplices && p->in_pos == p->splices[p->splices_pos].start) { in flow()
213 p->state = 1; in flow()
216 for (c = 0; c < effp->in_signal.channels; ++c) in flow()
223 if (p->state == 1) { in flow()
224 …size_t buffer_size = (2 * p->splices[p->splices_pos].overlap + p->splices[p->splices_pos].search) … in flow()
225 for (; idone < *isamp; ++idone, ++p->in_pos) { in flow()
226 if (p->buffer_pos == buffer_size) { in flow()
227 p->buffer_pos = do_splice(effp, p->buffer, in flow()
228 p->splices[p->splices_pos].overlap, in flow()
229 p->splices[p->splices_pos].search, in flow()
230 (size_t)effp->in_signal.channels) * effp->in_signal.channels; in flow()
231 p->state = 2; in flow()
235 for (c = 0; c < effp->in_signal.channels; ++c) in flow()
236 p->buffer[p->buffer_pos++] = *ibuf++; in flow()
242 if (p->state == 2) { in flow()
243 …size_t buffer_size = (2 * p->splices[p->splices_pos].overlap + p->splices[p->splices_pos].search) … in flow()
245 if (p->buffer_pos == buffer_size) { in flow()
246 p->buffer_pos = 0; in flow()
247 ++p->splices_pos; in flow()
248 p->state = p->splices_pos != p->nsplices && p->in_pos == p->splices[p->splices_pos].start; in flow()
251 for (c = 0; c < effp->in_signal.channels; ++c) in flow()
252 *obuf++ = p->buffer[p->buffer_pos++]; in flow()
258 *isamp = idone * effp->in_signal.channels; in flow()
259 *osamp = odone * effp->in_signal.channels; in flow()
271 priv_t * p = (priv_t *)effp->priv; in stop()
272 if (p->splices_pos != p->nsplices) in stop()
273 lsx_warn("Input audio too short; splices not made: %u", p->nsplices - p->splices_pos); in stop()
274 free(p->buffer); in stop()
280 priv_t * p = (priv_t *)effp->priv; in lsx_kill()
282 for (i = 0; i < p->nsplices; ++i) in lsx_kill()
283 free(p->splices[i].str); in lsx_kill()
284 free(p->splices); in lsx_kill()
291 "splice", "[-h|-t|-q] {position[,excess[,leeway]]}" in lsx_splice_effect_fn()
292 "\n -h Half sine fade (default); constant gain (for correlated audio)" in lsx_splice_effect_fn()
293 "\n -t Triangular (linear) fade; constant gain (for correlated audio)" in lsx_splice_effect_fn()
294 "\n -q Quarter sine fade; constant power (for correlated audio e.g. x-fade)" in lsx_splice_effect_fn()
297 "\n leeway Before part2 (default 0.005; set to 0 for cross-fade)", in lsx_splice_effect_fn()