FFmpeg coverage

Line	Branch	Exec	Source
1			/*
2			* Copyright (C) 2017 Paul B Mahol
3			* Copyright (C) 2013-2015 Andreas Fuchs, Wolfgang Hrauda
4			* This file is part of FFmpeg.
5			*
6			* FFmpeg is free software; you can redistribute it and/or
7			* modify it under the terms of the GNU Lesser General Public
8			* License as published by the Free Software Foundation; either
9			* version 2.1 of the License, or (at your option) any later version.
10			*
11			* FFmpeg is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14			* Lesser General Public License for more details.
15			*
16			* You should have received a copy of the GNU Lesser General Public
17			* License along with FFmpeg; if not, write to the Free Software
18			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19			*/
20
21			#include <math.h>
22
23			#include "libavutil/avstring.h"
24			#include "libavutil/channel_layout.h"
25			#include "libavutil/float_dsp.h"
26			#include "libavutil/intmath.h"
27			#include "libavutil/mem.h"
28			#include "libavutil/opt.h"
29			#include "libavutil/tx.h"
30
31			#include "avfilter.h"
32			#include "filters.h"
33			#include "formats.h"
34			#include "audio.h"
35
36			#define TIME_DOMAIN 0
37			#define FREQUENCY_DOMAIN 1
38
39			#define HRIR_STEREO 0
40			#define HRIR_MULTI 1
41
42			typedef struct HeadphoneContext {
43			const AVClass *class;
44
45			char *map;
46			int type;
47
48			int lfe_channel;
49
50			int have_hrirs;
51			int eof_hrirs;
52
53			int ir_len;
54			int air_len;
55
56			int nb_hrir_inputs;
57
58			int nb_irs;
59
60			float gain;
61			float lfe_gain, gain_lfe;
62
63			float *ringbuffer[2];
64			int write[2];
65
66			int buffer_length;
67			int n_fft;
68			int size;
69			int hrir_fmt;
70
71			float *data_ir[2];
72			float *temp_src[2];
73			AVComplexFloat *out_fft[2];
74			AVComplexFloat *in_fft[2];
75			AVComplexFloat *temp_afft[2];
76
77			AVTXContext *fft[2], *ifft[2];
78			av_tx_fn tx_fn[2], itx_fn[2];
79			AVComplexFloat *data_hrtf[2];
80
81			float (*scalarproduct_float)(const float *v1, const float *v2, int len);
82			struct hrir_inputs {
83			int ir_len;
84			int eof;
85			} hrir_in[64];
86			AVChannelLayout map_channel_layout;
87			enum AVChannel mapping[64];
88			uint8_t hrir_map[64];
89			} HeadphoneContext;
90
91		✗	static int parse_channel_name(const char *arg, enum AVChannel *rchannel)
92			{
93		✗	int channel = av_channel_from_string(arg);
94
95		✗	if (channel < 0 || channel >= 64)
96		✗	return AVERROR(EINVAL);
97		✗	*rchannel = channel;
98		✗	return 0;
99			}
100
101		✗	static void parse_map(AVFilterContext *ctx)
102			{
103		✗	HeadphoneContext *s = ctx->priv;
104			char *arg, *tokenizer, *p;
105		✗	uint64_t used_channels = 0;
106
107		✗	p = s->map;
108		✗	while ((arg = av_strtok(p, "|", &tokenizer))) {
109			enum AVChannel out_channel;
110
111		✗	p = NULL;
112		✗	if (parse_channel_name(arg, &out_channel)) {
113		✗	av_log(ctx, AV_LOG_WARNING, "Failed to parse \'%s\' as channel name.\n", arg);
114		✗	continue;
115			}
116		✗	if (used_channels & (1ULL << out_channel)) {
117		✗	av_log(ctx, AV_LOG_WARNING, "Ignoring duplicate channel '%s'.\n", arg);
118		✗	continue;
119			}
120		✗	used_channels |= (1ULL << out_channel);
121		✗	s->mapping[s->nb_irs] = out_channel;
122		✗	s->nb_irs++;
123			}
124		✗	av_channel_layout_from_mask(&s->map_channel_layout, used_channels);
125
126		✗	if (s->hrir_fmt == HRIR_MULTI)
127		✗	s->nb_hrir_inputs = 1;
128			else
129		✗	s->nb_hrir_inputs = s->nb_irs;
130		✗	}
131
132			typedef struct ThreadData {
133			AVFrame *in, *out;
134			int *write;
135			float **ir;
136			int *n_clippings;
137			float **ringbuffer;
138			float **temp_src;
139			AVComplexFloat **out_fft;
140			AVComplexFloat **in_fft;
141			AVComplexFloat **temp_afft;
142			} ThreadData;
143
144		✗	static int headphone_convolute(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
145			{
146		✗	HeadphoneContext *s = ctx->priv;
147		✗	ThreadData *td = arg;
148		✗	AVFrame *in = td->in, *out = td->out;
149		✗	int offset = jobnr;
150		✗	int *write = &td->write[jobnr];
151		✗	const float *const ir = td->ir[jobnr];
152		✗	int *n_clippings = &td->n_clippings[jobnr];
153		✗	float *ringbuffer = td->ringbuffer[jobnr];
154		✗	float *temp_src = td->temp_src[jobnr];
155		✗	const int ir_len = s->ir_len;
156		✗	const int air_len = s->air_len;
157		✗	const float *src = (const float *)in->data[0];
158		✗	float *dst = (float *)out->data[0];
159		✗	const int in_channels = in->ch_layout.nb_channels;
160		✗	const int buffer_length = s->buffer_length;
161		✗	const uint32_t modulo = (uint32_t)buffer_length - 1;
162			float *buffer[64];
163		✗	int wr = *write;
164			int read;
165			int i, l;
166
167		✗	dst += offset;
168		✗	for (l = 0; l < in_channels; l++) {
169		✗	buffer[l] = ringbuffer + l * buffer_length;
170			}
171
172		✗	for (i = 0; i < in->nb_samples; i++) {
173		✗	const float *cur_ir = ir;
174
175		✗	*dst = 0;
176		✗	for (l = 0; l < in_channels; l++) {
177		✗	*(buffer[l] + wr) = src[l];
178			}
179
180		✗	for (l = 0; l < in_channels; cur_ir += air_len, l++) {
181		✗	const float *const bptr = buffer[l];
182
183		✗	if (l == s->lfe_channel) {
184		✗	*dst += *(buffer[s->lfe_channel] + wr) * s->gain_lfe;
185		✗	continue;
186			}
187
188		✗	read = (wr - (ir_len - 1)) & modulo;
189
190		✗	if (read + ir_len < buffer_length) {
191		✗	memcpy(temp_src, bptr + read, ir_len * sizeof(*temp_src));
192			} else {
193		✗	int len = FFMIN(air_len - (read % ir_len), buffer_length - read);
194
195		✗	memcpy(temp_src, bptr + read, len * sizeof(*temp_src));
196		✗	memcpy(temp_src + len, bptr, (air_len - len) * sizeof(*temp_src));
197			}
198
199		✗	dst[0] += s->scalarproduct_float(cur_ir, temp_src, FFALIGN(ir_len, 32));
200			}
201
202		✗	if (fabsf(dst[0]) > 1)
203		✗	n_clippings[0]++;
204
205		✗	dst += 2;
206		✗	src += in_channels;
207		✗	wr = (wr + 1) & modulo;
208			}
209
210		✗	*write = wr;
211
212		✗	return 0;
213			}
214
215		✗	static int headphone_fast_convolute(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
216			{
217		✗	HeadphoneContext *s = ctx->priv;
218		✗	ThreadData *td = arg;
219		✗	AVFrame *in = td->in, *out = td->out;
220		✗	int offset = jobnr;
221		✗	int *write = &td->write[jobnr];
222		✗	AVComplexFloat *hrtf = s->data_hrtf[jobnr];
223		✗	int *n_clippings = &td->n_clippings[jobnr];
224		✗	float *ringbuffer = td->ringbuffer[jobnr];
225		✗	const int ir_len = s->ir_len;
226		✗	const float *src = (const float *)in->data[0];
227		✗	float *dst = (float *)out->data[0];
228		✗	const int in_channels = in->ch_layout.nb_channels;
229		✗	const int buffer_length = s->buffer_length;
230		✗	const uint32_t modulo = (uint32_t)buffer_length - 1;
231		✗	AVComplexFloat *fft_out = s->out_fft[jobnr];
232		✗	AVComplexFloat *fft_in = s->in_fft[jobnr];
233		✗	AVComplexFloat *fft_acc = s->temp_afft[jobnr];
234		✗	AVTXContext *ifft = s->ifft[jobnr];
235		✗	AVTXContext *fft = s->fft[jobnr];
236		✗	av_tx_fn tx_fn = s->tx_fn[jobnr];
237		✗	av_tx_fn itx_fn = s->itx_fn[jobnr];
238		✗	const int n_fft = s->n_fft;
239		✗	const float fft_scale = 1.0f / s->n_fft;
240			AVComplexFloat *hrtf_offset;
241		✗	int wr = *write;
242			int n_read;
243			int i, j;
244
245		✗	dst += offset;
246
247		✗	n_read = FFMIN(ir_len, in->nb_samples);
248		✗	for (j = 0; j < n_read; j++) {
249		✗	dst[2 * j] = ringbuffer[wr];
250		✗	ringbuffer[wr] = 0.0;
251		✗	wr = (wr + 1) & modulo;
252			}
253
254		✗	for (j = n_read; j < in->nb_samples; j++) {
255		✗	dst[2 * j] = 0;
256			}
257
258		✗	memset(fft_acc, 0, sizeof(AVComplexFloat) * n_fft);
259
260		✗	for (i = 0; i < in_channels; i++) {
261		✗	if (i == s->lfe_channel) {
262		✗	for (j = 0; j < in->nb_samples; j++) {
263		✗	dst[2 * j] += src[i + j * in_channels] * s->gain_lfe;
264			}
265		✗	continue;
266			}
267
268		✗	offset = i * n_fft;
269		✗	hrtf_offset = hrtf + s->hrir_map[i] * n_fft;
270
271		✗	memset(fft_in, 0, sizeof(AVComplexFloat) * n_fft);
272
273		✗	for (j = 0; j < in->nb_samples; j++) {
274		✗	fft_in[j].re = src[j * in_channels + i];
275			}
276
277		✗	tx_fn(fft, fft_out, fft_in, sizeof(*fft_in));
278
279		✗	for (j = 0; j < n_fft; j++) {
280		✗	const AVComplexFloat *hcomplex = hrtf_offset + j;
281		✗	const float re = fft_out[j].re;
282		✗	const float im = fft_out[j].im;
283
284		✗	fft_acc[j].re += re * hcomplex->re - im * hcomplex->im;
285		✗	fft_acc[j].im += re * hcomplex->im + im * hcomplex->re;
286			}
287			}
288
289		✗	itx_fn(ifft, fft_out, fft_acc, sizeof(*fft_acc));
290
291		✗	for (j = 0; j < in->nb_samples; j++) {
292		✗	dst[2 * j] += fft_out[j].re * fft_scale;
293		✗	if (fabsf(dst[2 * j]) > 1)
294		✗	n_clippings[0]++;
295			}
296
297		✗	for (j = 0; j < ir_len - 1; j++) {
298		✗	int write_pos = (wr + j) & modulo;
299
300		✗	*(ringbuffer + write_pos) += fft_out[in->nb_samples + j].re * fft_scale;
301			}
302
303		✗	*write = wr;
304
305		✗	return 0;
306			}
307
308		✗	static int check_ir(AVFilterLink *inlink, int input_number)
309			{
310		✗	AVFilterContext *ctx = inlink->dst;
311		✗	HeadphoneContext *s = ctx->priv;
312			int ir_len, max_ir_len;
313
314		✗	ir_len = ff_inlink_queued_samples(inlink);
315		✗	max_ir_len = 65536;
316		✗	if (ir_len > max_ir_len) {
317		✗	av_log(ctx, AV_LOG_ERROR, "Too big length of IRs: %d > %d.\n", ir_len, max_ir_len);
318		✗	return AVERROR(EINVAL);
319			}
320		✗	s->hrir_in[input_number].ir_len = ir_len;
321		✗	s->ir_len = FFMAX(ir_len, s->ir_len);
322
323		✗	if (ff_inlink_check_available_samples(inlink, ir_len + 1) == 1) {
324		✗	s->hrir_in[input_number].eof = 1;
325		✗	return 1;
326			}
327
328		✗	if (!s->hrir_in[input_number].eof) {
329		✗	ff_inlink_request_frame(inlink);
330		✗	return 0;
331			}
332
333		✗	return 0;
334			}
335
336		✗	static int headphone_frame(HeadphoneContext *s, AVFrame *in, AVFilterLink *outlink)
337			{
338		✗	AVFilterContext *ctx = outlink->src;
339		✗	int n_clippings[2] = { 0 };
340			ThreadData td;
341			AVFrame *out;
342
343		✗	out = ff_get_audio_buffer(outlink, in->nb_samples);
344		✗	if (!out) {
345		✗	av_frame_free(&in);
346		✗	return AVERROR(ENOMEM);
347			}
348		✗	out->pts = in->pts;
349
350		✗	td.in = in; td.out = out; td.write = s->write;
351		✗	td.ir = s->data_ir; td.n_clippings = n_clippings;
352		✗	td.ringbuffer = s->ringbuffer; td.temp_src = s->temp_src;
353		✗	td.out_fft = s->out_fft;
354		✗	td.in_fft = s->in_fft;
355		✗	td.temp_afft = s->temp_afft;
356
357		✗	if (s->type == TIME_DOMAIN) {
358		✗	ff_filter_execute(ctx, headphone_convolute, &td, NULL, 2);
359			} else {
360		✗	ff_filter_execute(ctx, headphone_fast_convolute, &td, NULL, 2);
361			}
362
363		✗	if (n_clippings[0] + n_clippings[1] > 0) {
364		✗	av_log(ctx, AV_LOG_WARNING, "%d of %d samples clipped. Please reduce gain.\n",
365		✗	n_clippings[0] + n_clippings[1], out->nb_samples * 2);
366			}
367
368		✗	av_frame_free(&in);
369		✗	return ff_filter_frame(outlink, out);
370			}
371
372		✗	static int convert_coeffs(AVFilterContext *ctx, AVFilterLink *inlink)
373			{
374		✗	struct HeadphoneContext *s = ctx->priv;
375		✗	const int ir_len = s->ir_len;
376		✗	int nb_input_channels = ctx->inputs[0]->ch_layout.nb_channels;
377		✗	const int nb_hrir_channels = s->nb_hrir_inputs == 1 ? ctx->inputs[1]->ch_layout.nb_channels : s->nb_hrir_inputs * 2;
378		✗	float gain_lin = expf((s->gain - 3 * nb_input_channels) / 20 * M_LN10);
379			AVFrame *frame;
380		✗	int ret = 0;
381			int n_fft;
382			int i, j, k;
383
384		✗	s->air_len = 1 << (32 - ff_clz(ir_len));
385		✗	if (s->type == TIME_DOMAIN) {
386		✗	s->air_len = FFALIGN(s->air_len, 32);
387			}
388		✗	s->buffer_length = 1 << (32 - ff_clz(s->air_len));
389		✗	s->n_fft = n_fft = 1 << (32 - ff_clz(ir_len + s->size));
390
391		✗	if (s->type == FREQUENCY_DOMAIN) {
392		✗	float scale = 1.f;
393
394		✗	ret = av_tx_init(&s->fft[0], &s->tx_fn[0], AV_TX_FLOAT_FFT, 0, s->n_fft, &scale, 0);
395		✗	if (ret < 0)
396		✗	goto fail;
397		✗	ret = av_tx_init(&s->fft[1], &s->tx_fn[1], AV_TX_FLOAT_FFT, 0, s->n_fft, &scale, 0);
398		✗	if (ret < 0)
399		✗	goto fail;
400		✗	ret = av_tx_init(&s->ifft[0], &s->itx_fn[0], AV_TX_FLOAT_FFT, 1, s->n_fft, &scale, 0);
401		✗	if (ret < 0)
402		✗	goto fail;
403		✗	ret = av_tx_init(&s->ifft[1], &s->itx_fn[1], AV_TX_FLOAT_FFT, 1, s->n_fft, &scale, 0);
404		✗	if (ret < 0)
405		✗	goto fail;
406
407		✗	if (!s->fft[0] || !s->fft[1] || !s->ifft[0] || !s->ifft[1]) {
408		✗	av_log(ctx, AV_LOG_ERROR, "Unable to create FFT contexts of size %d.\n", s->n_fft);
409		✗	ret = AVERROR(ENOMEM);
410		✗	goto fail;
411			}
412			}
413
414		✗	if (s->type == TIME_DOMAIN) {
415		✗	s->ringbuffer[0] = av_calloc(s->buffer_length, sizeof(float) * nb_input_channels);
416		✗	s->ringbuffer[1] = av_calloc(s->buffer_length, sizeof(float) * nb_input_channels);
417			} else {
418		✗	s->ringbuffer[0] = av_calloc(s->buffer_length, sizeof(float));
419		✗	s->ringbuffer[1] = av_calloc(s->buffer_length, sizeof(float));
420		✗	s->out_fft[0] = av_calloc(s->n_fft, sizeof(AVComplexFloat));
421		✗	s->out_fft[1] = av_calloc(s->n_fft, sizeof(AVComplexFloat));
422		✗	s->in_fft[0] = av_calloc(s->n_fft, sizeof(AVComplexFloat));
423		✗	s->in_fft[1] = av_calloc(s->n_fft, sizeof(AVComplexFloat));
424		✗	s->temp_afft[0] = av_calloc(s->n_fft, sizeof(AVComplexFloat));
425		✗	s->temp_afft[1] = av_calloc(s->n_fft, sizeof(AVComplexFloat));
426		✗	if (!s->in_fft[0] || !s->in_fft[1] ||
427		✗	!s->out_fft[0] || !s->out_fft[1] ||
428		✗	!s->temp_afft[0] || !s->temp_afft[1]) {
429		✗	ret = AVERROR(ENOMEM);
430		✗	goto fail;
431			}
432			}
433
434		✗	if (!s->ringbuffer[0] || !s->ringbuffer[1]) {
435		✗	ret = AVERROR(ENOMEM);
436		✗	goto fail;
437			}
438
439		✗	if (s->type == TIME_DOMAIN) {
440		✗	s->temp_src[0] = av_calloc(s->air_len, sizeof(float));
441		✗	s->temp_src[1] = av_calloc(s->air_len, sizeof(float));
442
443		✗	s->data_ir[0] = av_calloc(nb_hrir_channels * s->air_len, sizeof(*s->data_ir[0]));
444		✗	s->data_ir[1] = av_calloc(nb_hrir_channels * s->air_len, sizeof(*s->data_ir[1]));
445		✗	if (!s->data_ir[0] || !s->data_ir[1] || !s->temp_src[0] || !s->temp_src[1]) {
446		✗	ret = AVERROR(ENOMEM);
447		✗	goto fail;
448			}
449			} else {
450		✗	s->data_hrtf[0] = av_calloc(n_fft, sizeof(*s->data_hrtf[0]) * nb_hrir_channels);
451		✗	s->data_hrtf[1] = av_calloc(n_fft, sizeof(*s->data_hrtf[1]) * nb_hrir_channels);
452		✗	if (!s->data_hrtf[0] || !s->data_hrtf[1]) {
453		✗	ret = AVERROR(ENOMEM);
454		✗	goto fail;
455			}
456			}
457
458		✗	for (i = 0; i < s->nb_hrir_inputs; av_frame_free(&frame), i++) {
459		✗	int len = s->hrir_in[i].ir_len;
460			float *ptr;
461
462		✗	ret = ff_inlink_consume_samples(ctx->inputs[i + 1], len, len, &frame);
463		✗	if (ret < 0)
464		✗	goto fail;
465		✗	ptr = (float *)frame->extended_data[0];
466
467		✗	if (s->hrir_fmt == HRIR_STEREO) {
468		✗	int idx = av_channel_layout_index_from_channel(&s->map_channel_layout,
469			s->mapping[i]);
470		✗	if (idx < 0)
471		✗	continue;
472
473		✗	s->hrir_map[i] = idx;
474		✗	if (s->type == TIME_DOMAIN) {
475		✗	float *data_ir_l = s->data_ir[0] + idx * s->air_len;
476		✗	float *data_ir_r = s->data_ir[1] + idx * s->air_len;
477
478		✗	for (j = 0; j < len; j++) {
479		✗	data_ir_l[j] = ptr[len * 2 - j * 2 - 2] * gain_lin;
480		✗	data_ir_r[j] = ptr[len * 2 - j * 2 - 1] * gain_lin;
481			}
482			} else {
483		✗	AVComplexFloat *fft_out_l = s->data_hrtf[0] + idx * n_fft;
484		✗	AVComplexFloat *fft_out_r = s->data_hrtf[1] + idx * n_fft;
485		✗	AVComplexFloat *fft_in_l = s->in_fft[0];
486		✗	AVComplexFloat *fft_in_r = s->in_fft[1];
487
488		✗	for (j = 0; j < len; j++) {
489		✗	fft_in_l[j].re = ptr[j * 2 ] * gain_lin;
490		✗	fft_in_r[j].re = ptr[j * 2 + 1] * gain_lin;
491			}
492
493		✗	s->tx_fn[0](s->fft[0], fft_out_l, fft_in_l, sizeof(*fft_in_l));
494		✗	s->tx_fn[0](s->fft[0], fft_out_r, fft_in_r, sizeof(*fft_in_r));
495			}
496			} else {
497		✗	int I, N = ctx->inputs[1]->ch_layout.nb_channels;
498
499		✗	for (k = 0; k < N / 2; k++) {
500		✗	int idx = av_channel_layout_index_from_channel(&inlink->ch_layout,
501			s->mapping[k]);
502		✗	if (idx < 0)
503		✗	continue;
504
505		✗	s->hrir_map[k] = idx;
506		✗	I = k * 2;
507		✗	if (s->type == TIME_DOMAIN) {
508		✗	float *data_ir_l = s->data_ir[0] + idx * s->air_len;
509		✗	float *data_ir_r = s->data_ir[1] + idx * s->air_len;
510
511		✗	for (j = 0; j < len; j++) {
512		✗	data_ir_l[j] = ptr[len * N - j * N - N + I ] * gain_lin;
513		✗	data_ir_r[j] = ptr[len * N - j * N - N + I + 1] * gain_lin;
514			}
515			} else {
516		✗	AVComplexFloat *fft_out_l = s->data_hrtf[0] + idx * n_fft;
517		✗	AVComplexFloat *fft_out_r = s->data_hrtf[1] + idx * n_fft;
518		✗	AVComplexFloat *fft_in_l = s->in_fft[0];
519		✗	AVComplexFloat *fft_in_r = s->in_fft[1];
520
521		✗	for (j = 0; j < len; j++) {
522		✗	fft_in_l[j].re = ptr[j * N + I ] * gain_lin;
523		✗	fft_in_r[j].re = ptr[j * N + I + 1] * gain_lin;
524			}
525
526		✗	s->tx_fn[0](s->fft[0], fft_out_l, fft_in_l, sizeof(*fft_in_l));
527		✗	s->tx_fn[0](s->fft[0], fft_out_r, fft_in_r, sizeof(*fft_in_r));
528			}
529			}
530			}
531			}
532
533		✗	s->have_hrirs = 1;
534
535		✗	fail:
536		✗	return ret;
537			}
538
539		✗	static int activate(AVFilterContext *ctx)
540			{
541		✗	HeadphoneContext *s = ctx->priv;
542		✗	AVFilterLink *inlink = ctx->inputs[0];
543		✗	AVFilterLink *outlink = ctx->outputs[0];
544		✗	AVFrame *in = NULL;
545			int i, ret;
546
547		✗	FF_FILTER_FORWARD_STATUS_BACK_ALL(outlink, ctx);
548		✗	if (!s->eof_hrirs) {
549		✗	int eof = 1;
550		✗	for (i = 0; i < s->nb_hrir_inputs; i++) {
551		✗	AVFilterLink *input = ctx->inputs[i + 1];
552
553		✗	if (s->hrir_in[i].eof)
554		✗	continue;
555
556		✗	if ((ret = check_ir(input, i)) <= 0)
557		✗	return ret;
558
559		✗	if (s->hrir_in[i].eof) {
560		✗	if (!ff_inlink_queued_samples(input)) {
561		✗	av_log(ctx, AV_LOG_ERROR, "No samples provided for "
562			"HRIR stream %d.\n", i);
563		✗	return AVERROR_INVALIDDATA;
564			}
565			} else {
566		✗	eof = 0;
567			}
568			}
569		✗	if (!eof) {
570		✗	ff_filter_set_ready(ctx, 100);
571		✗	return 0;
572			}
573		✗	s->eof_hrirs = 1;
574
575		✗	ret = convert_coeffs(ctx, inlink);
576		✗	if (ret < 0)
577		✗	return ret;
578		✗	} else if (!s->have_hrirs)
579		✗	return AVERROR_EOF;
580
581		✗	if ((ret = ff_inlink_consume_samples(inlink, s->size, s->size, &in)) > 0) {
582		✗	ret = headphone_frame(s, in, outlink);
583		✗	if (ret < 0)
584		✗	return ret;
585			}
586
587		✗	if (ret < 0)
588		✗	return ret;
589
590		✗	FF_FILTER_FORWARD_STATUS(inlink, outlink);
591		✗	if (ff_outlink_frame_wanted(outlink))
592		✗	ff_inlink_request_frame(inlink);
593
594		✗	return 0;
595			}
596
597		✗	static int query_formats(const AVFilterContext *ctx,
598			AVFilterFormatsConfig **cfg_in,
599			AVFilterFormatsConfig **cfg_out)
600			{
601			static const enum AVSampleFormat formats[] = {
602			AV_SAMPLE_FMT_FLT,
603			AV_SAMPLE_FMT_NONE,
604			};
605
606		✗	const HeadphoneContext *s = ctx->priv;
607
608		✗	AVFilterChannelLayouts *layouts = NULL;
609		✗	AVFilterChannelLayouts *stereo_layout = NULL;
610		✗	AVFilterChannelLayouts *hrir_layouts = NULL;
611			int ret, i;
612
613		✗	ret = ff_set_sample_formats_from_list2(ctx, cfg_in, cfg_out, formats);
614		✗	if (ret)
615		✗	return ret;
616
617		✗	layouts = ff_all_channel_layouts();
618		✗	if (!layouts)
619		✗	return AVERROR(ENOMEM);
620
621		✗	ret = ff_channel_layouts_ref(layouts, &cfg_in[0]->channel_layouts);
622		✗	if (ret)
623		✗	return ret;
624
625		✗	ret = ff_add_channel_layout(&stereo_layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO);
626		✗	if (ret)
627		✗	return ret;
628		✗	ret = ff_channel_layouts_ref(stereo_layout, &cfg_out[0]->channel_layouts);
629		✗	if (ret)
630		✗	return ret;
631
632		✗	if (s->hrir_fmt == HRIR_MULTI) {
633		✗	hrir_layouts = ff_all_channel_counts();
634		✗	if (!hrir_layouts)
635		✗	return AVERROR(ENOMEM);
636		✗	ret = ff_channel_layouts_ref(hrir_layouts, &cfg_in[1]->channel_layouts);
637		✗	if (ret)
638		✗	return ret;
639			} else {
640		✗	for (i = 1; i <= s->nb_hrir_inputs; i++) {
641		✗	ret = ff_channel_layouts_ref(stereo_layout, &cfg_in[1]->channel_layouts);
642		✗	if (ret)
643		✗	return ret;
644			}
645			}
646
647		✗	return 0;
648			}
649
650		✗	static int config_input(AVFilterLink *inlink)
651			{
652		✗	AVFilterContext *ctx = inlink->dst;
653		✗	HeadphoneContext *s = ctx->priv;
654
655		✗	if (s->nb_irs < inlink->ch_layout.nb_channels) {
656		✗	av_log(ctx, AV_LOG_ERROR, "Number of HRIRs must be >= %d.\n", inlink->ch_layout.nb_channels);
657		✗	return AVERROR(EINVAL);
658			}
659
660		✗	s->lfe_channel = av_channel_layout_index_from_channel(&inlink->ch_layout,
661			AV_CHAN_LOW_FREQUENCY);
662		✗	return 0;
663			}
664
665		✗	static av_cold int init(AVFilterContext *ctx)
666			{
667		✗	HeadphoneContext *s = ctx->priv;
668			int i, ret;
669
670		✗	AVFilterPad pad = {
671			.name = "in0",
672			.type = AVMEDIA_TYPE_AUDIO,
673			.config_props = config_input,
674			};
675		✗	if ((ret = ff_append_inpad(ctx, &pad)) < 0)
676		✗	return ret;
677
678		✗	if (!s->map) {
679		✗	av_log(ctx, AV_LOG_ERROR, "Valid mapping must be set.\n");
680		✗	return AVERROR(EINVAL);
681			}
682
683		✗	parse_map(ctx);
684
685		✗	for (i = 0; i < s->nb_hrir_inputs; i++) {
686		✗	char *name = av_asprintf("hrir%d", i);
687		✗	AVFilterPad pad = {
688			.name = name,
689			.type = AVMEDIA_TYPE_AUDIO,
690			};
691		✗	if (!name)
692		✗	return AVERROR(ENOMEM);
693		✗	if ((ret = ff_append_inpad_free_name(ctx, &pad)) < 0)
694		✗	return ret;
695			}
696
697		✗	if (s->type == TIME_DOMAIN) {
698		✗	AVFloatDSPContext *fdsp = avpriv_float_dsp_alloc(0);
699		✗	if (!fdsp)
700		✗	return AVERROR(ENOMEM);
701		✗	s->scalarproduct_float = fdsp->scalarproduct_float;
702		✗	av_free(fdsp);
703			}
704
705		✗	return 0;
706			}
707
708		✗	static int config_output(AVFilterLink *outlink)
709			{
710		✗	AVFilterContext *ctx = outlink->src;
711		✗	HeadphoneContext *s = ctx->priv;
712		✗	AVFilterLink *inlink = ctx->inputs[0];
713
714		✗	if (s->hrir_fmt == HRIR_MULTI) {
715		✗	AVFilterLink *hrir_link = ctx->inputs[1];
716
717		✗	if (hrir_link->ch_layout.nb_channels < inlink->ch_layout.nb_channels * 2) {
718		✗	av_log(ctx, AV_LOG_ERROR, "Number of channels in HRIR stream must be >= %d.\n", inlink->ch_layout.nb_channels * 2);
719		✗	return AVERROR(EINVAL);
720			}
721			}
722
723		✗	s->gain_lfe = expf((s->gain - 3 * inlink->ch_layout.nb_channels + s->lfe_gain) / 20 * M_LN10);
724
725		✗	return 0;
726			}
727
728		✗	static av_cold void uninit(AVFilterContext *ctx)
729			{
730		✗	HeadphoneContext *s = ctx->priv;
731
732		✗	av_tx_uninit(&s->ifft[0]);
733		✗	av_tx_uninit(&s->ifft[1]);
734		✗	av_tx_uninit(&s->fft[0]);
735		✗	av_tx_uninit(&s->fft[1]);
736		✗	av_freep(&s->data_ir[0]);
737		✗	av_freep(&s->data_ir[1]);
738		✗	av_freep(&s->ringbuffer[0]);
739		✗	av_freep(&s->ringbuffer[1]);
740		✗	av_freep(&s->temp_src[0]);
741		✗	av_freep(&s->temp_src[1]);
742		✗	av_freep(&s->out_fft[0]);
743		✗	av_freep(&s->out_fft[1]);
744		✗	av_freep(&s->in_fft[0]);
745		✗	av_freep(&s->in_fft[1]);
746		✗	av_freep(&s->temp_afft[0]);
747		✗	av_freep(&s->temp_afft[1]);
748		✗	av_freep(&s->data_hrtf[0]);
749		✗	av_freep(&s->data_hrtf[1]);
750		✗	}
751
752			#define OFFSET(x) offsetof(HeadphoneContext, x)
753			#define FLAGS AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
754
755			static const AVOption headphone_options[] = {
756			{ "map", "set channels convolution mappings", OFFSET(map), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
757			{ "gain", "set gain in dB", OFFSET(gain), AV_OPT_TYPE_FLOAT, {.dbl=0}, -20, 40, .flags = FLAGS },
758			{ "lfe", "set lfe gain in dB", OFFSET(lfe_gain), AV_OPT_TYPE_FLOAT, {.dbl=0}, -20, 40, .flags = FLAGS },
759			{ "type", "set processing", OFFSET(type), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, .flags = FLAGS, .unit = "type" },
760			{ "time", "time domain", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, .flags = FLAGS, .unit = "type" },
761			{ "freq", "frequency domain", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, .flags = FLAGS, .unit = "type" },
762			{ "size", "set frame size", OFFSET(size), AV_OPT_TYPE_INT, {.i64=1024},1024,96000, .flags = FLAGS },
763			{ "hrir", "set hrir format", OFFSET(hrir_fmt), AV_OPT_TYPE_INT, {.i64=HRIR_STEREO}, 0, 1, .flags = FLAGS, .unit = "hrir" },
764			{ "stereo", "hrir files have exactly 2 channels", 0, AV_OPT_TYPE_CONST, {.i64=HRIR_STEREO}, 0, 0, .flags = FLAGS, .unit = "hrir" },
765			{ "multich", "single multichannel hrir file", 0, AV_OPT_TYPE_CONST, {.i64=HRIR_MULTI}, 0, 0, .flags = FLAGS, .unit = "hrir" },
766			{ NULL }
767			};
768
769			AVFILTER_DEFINE_CLASS(headphone);
770
771			static const AVFilterPad outputs[] = {
772			{
773			.name = "default",
774			.type = AVMEDIA_TYPE_AUDIO,
775			.config_props = config_output,
776			},
777			};
778
779			const FFFilter ff_af_headphone = {
780			.p.name = "headphone",
781			.p.description = NULL_IF_CONFIG_SMALL("Apply headphone binaural spatialization with HRTFs in additional streams."),
782			.p.priv_class = &headphone_class,
783			.p.flags = AVFILTER_FLAG_SLICE_THREADS | AVFILTER_FLAG_DYNAMIC_INPUTS,
784			.priv_size = sizeof(HeadphoneContext),
785			.init = init,
786			.uninit = uninit,
787			.activate = activate,
788			FILTER_OUTPUTS(outputs),
789			FILTER_QUERY_FUNC2(query_formats),
790			};
791