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