avfilter/af_afir: add support for switching impulse response streams at runtime
Currently, switching is not free of artifacts, to be resolved later.
This commit is contained in:
Paul B Mahol
parent
03a7240a73
commit
52bf43eb49
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@ -1183,7 +1183,7 @@ afftfilt="real='hypot(re,im)*cos((random(0)*2-1)*2*3.14)':imag='hypot(re,im)*sin
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@anchor{afir}
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@section afir
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Apply an arbitrary Frequency Impulse Response filter.
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Apply an arbitrary Finite Impulse Response filter.
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This filter is designed for applying long FIR filters,
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up to 60 seconds long.
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@ -1192,10 +1192,10 @@ It can be used as component for digital crossover filters,
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room equalization, cross talk cancellation, wavefield synthesis,
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auralization, ambiophonics, ambisonics and spatialization.
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This filter uses the second stream as FIR coefficients.
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If the second stream holds a single channel, it will be used
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This filter uses the streams higher than first one as FIR coefficients.
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If the non-first stream holds a single channel, it will be used
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for all input channels in the first stream, otherwise
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the number of channels in the second stream must be same as
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the number of channels in the non-first stream must be same as
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the number of channels in the first stream.
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It accepts the following parameters:
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@ -1264,6 +1264,15 @@ Lower values decreases latency at cost of higher CPU usage.
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Set maximal partition size used for convolution. Default is @var{8192}.
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Allowed range is from @var{8} to @var{32768}.
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Lower values may increase CPU usage.
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@item nbirs
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Set number of input impulse responses streams which will be switchable at runtime.
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Allowed range is from @var{1} to @var{32}. Default is @var{1}.
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@item ir
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Set IR stream which will be used for convolution, starting from @var{0}, should always be
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lower than supplied value by @code{nbirs} option. Default is @var{0}.
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This option can be changed at runtime via @ref{commands}.
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@end table
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@subsection Examples
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@ -25,6 +25,7 @@
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#include <float.h>
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#include "libavutil/avstring.h"
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#include "libavutil/common.h"
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#include "libavutil/float_dsp.h"
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#include "libavutil/intreadwrite.h"
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@ -298,9 +299,9 @@ static void draw_response(AVFilterContext *ctx, AVFrame *out)
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if (!mag || !phase || !delay)
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goto end;
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channel = av_clip(s->ir_channel, 0, s->ir[0]->channels - 1);
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channel = av_clip(s->ir_channel, 0, s->ir[s->selir]->channels - 1);
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for (i = 0; i < s->w; i++) {
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const float *src = (const float *)s->ir[0]->extended_data[channel];
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const float *src = (const float *)s->ir[s->selir]->extended_data[channel];
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double w = i * M_PI / (s->w - 1);
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double div, real_num = 0., imag_num = 0., real = 0., imag = 0.;
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@ -403,7 +404,7 @@ static int init_segment(AVFilterContext *ctx, AudioFIRSegment *seg,
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seg->sum = ff_get_audio_buffer(ctx->inputs[0], seg->fft_length);
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seg->block = ff_get_audio_buffer(ctx->inputs[0], seg->nb_partitions * seg->block_size);
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seg->buffer = ff_get_audio_buffer(ctx->inputs[0], seg->part_size);
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seg->coeff = ff_get_audio_buffer(ctx->inputs[1], seg->nb_partitions * seg->coeff_size * 2);
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seg->coeff = ff_get_audio_buffer(ctx->inputs[1 + s->selir], seg->nb_partitions * seg->coeff_size * 2);
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seg->input = ff_get_audio_buffer(ctx->inputs[0], seg->input_size);
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seg->output = ff_get_audio_buffer(ctx->inputs[0], seg->part_size);
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if (!seg->buffer || !seg->sum || !seg->block || !seg->coeff || !seg->input || !seg->output)
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@ -412,79 +413,116 @@ static int init_segment(AVFilterContext *ctx, AudioFIRSegment *seg,
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return 0;
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}
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static void uninit_segment(AVFilterContext *ctx, AudioFIRSegment *seg)
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{
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AudioFIRContext *s = ctx->priv;
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if (seg->rdft) {
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for (int ch = 0; ch < s->nb_channels; ch++) {
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av_rdft_end(seg->rdft[ch]);
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}
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}
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av_freep(&seg->rdft);
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if (seg->irdft) {
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for (int ch = 0; ch < s->nb_channels; ch++) {
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av_rdft_end(seg->irdft[ch]);
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}
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}
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av_freep(&seg->irdft);
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av_freep(&seg->output_offset);
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av_freep(&seg->part_index);
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av_frame_free(&seg->block);
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av_frame_free(&seg->sum);
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av_frame_free(&seg->buffer);
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av_frame_free(&seg->coeff);
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av_frame_free(&seg->input);
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av_frame_free(&seg->output);
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seg->input_size = 0;
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}
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static int convert_coeffs(AVFilterContext *ctx)
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{
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AudioFIRContext *s = ctx->priv;
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int left, offset = 0, part_size, max_part_size;
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int ret, i, ch, n;
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int ret, i, ch, n, cur_nb_taps;
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float power = 0;
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s->nb_taps = ff_inlink_queued_samples(ctx->inputs[1]);
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if (s->nb_taps <= 0)
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return AVERROR(EINVAL);
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if (!s->nb_taps) {
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int part_size, max_part_size;
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int left, offset = 0;
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if (s->minp > s->maxp) {
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s->maxp = s->minp;
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s->nb_taps = ff_inlink_queued_samples(ctx->inputs[1 + s->selir]);
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if (s->nb_taps <= 0)
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return AVERROR(EINVAL);
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if (s->minp > s->maxp) {
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s->maxp = s->minp;
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}
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left = s->nb_taps;
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part_size = 1 << av_log2(s->minp);
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max_part_size = 1 << av_log2(s->maxp);
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s->min_part_size = part_size;
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for (i = 0; left > 0; i++) {
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int step = part_size == max_part_size ? INT_MAX : 1 + (i == 0);
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int nb_partitions = FFMIN(step, (left + part_size - 1) / part_size);
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s->nb_segments = i + 1;
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ret = init_segment(ctx, &s->seg[i], offset, nb_partitions, part_size);
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if (ret < 0)
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return ret;
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offset += nb_partitions * part_size;
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left -= nb_partitions * part_size;
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part_size *= 2;
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part_size = FFMIN(part_size, max_part_size);
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}
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}
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left = s->nb_taps;
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part_size = 1 << av_log2(s->minp);
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max_part_size = 1 << av_log2(s->maxp);
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s->min_part_size = part_size;
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for (i = 0; left > 0; i++) {
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int step = part_size == max_part_size ? INT_MAX : 1 + (i == 0);
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int nb_partitions = FFMIN(step, (left + part_size - 1) / part_size);
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s->nb_segments = i + 1;
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ret = init_segment(ctx, &s->seg[i], offset, nb_partitions, part_size);
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if (!s->ir[s->selir]) {
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ret = ff_inlink_consume_samples(ctx->inputs[1 + s->selir], s->nb_taps, s->nb_taps, &s->ir[s->selir]);
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if (ret < 0)
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return ret;
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offset += nb_partitions * part_size;
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left -= nb_partitions * part_size;
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part_size *= 2;
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part_size = FFMIN(part_size, max_part_size);
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if (ret == 0)
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return AVERROR_BUG;
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}
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ret = ff_inlink_consume_samples(ctx->inputs[1], s->nb_taps, s->nb_taps, &s->ir[0]);
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if (ret < 0)
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return ret;
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if (ret == 0)
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return AVERROR_BUG;
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if (s->response)
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draw_response(ctx, s->video);
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s->gain = 1;
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cur_nb_taps = s->ir[s->selir]->nb_samples;
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switch (s->gtype) {
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case -1:
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/* nothing to do */
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break;
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case 0:
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for (ch = 0; ch < ctx->inputs[1]->channels; ch++) {
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float *time = (float *)s->ir[0]->extended_data[!s->one2many * ch];
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for (ch = 0; ch < ctx->inputs[1 + s->selir]->channels; ch++) {
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float *time = (float *)s->ir[s->selir]->extended_data[!s->one2many * ch];
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for (i = 0; i < s->nb_taps; i++)
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for (i = 0; i < cur_nb_taps; i++)
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power += FFABS(time[i]);
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}
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s->gain = ctx->inputs[1]->channels / power;
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s->gain = ctx->inputs[1 + s->selir]->channels / power;
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break;
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case 1:
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for (ch = 0; ch < ctx->inputs[1]->channels; ch++) {
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float *time = (float *)s->ir[0]->extended_data[!s->one2many * ch];
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for (ch = 0; ch < ctx->inputs[1 + s->selir]->channels; ch++) {
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float *time = (float *)s->ir[s->selir]->extended_data[!s->one2many * ch];
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for (i = 0; i < s->nb_taps; i++)
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for (i = 0; i < cur_nb_taps; i++)
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power += time[i];
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}
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s->gain = ctx->inputs[1]->channels / power;
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s->gain = ctx->inputs[1 + s->selir]->channels / power;
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break;
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case 2:
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for (ch = 0; ch < ctx->inputs[1]->channels; ch++) {
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float *time = (float *)s->ir[0]->extended_data[!s->one2many * ch];
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for (ch = 0; ch < ctx->inputs[1 + s->selir]->channels; ch++) {
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float *time = (float *)s->ir[s->selir]->extended_data[!s->one2many * ch];
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for (i = 0; i < s->nb_taps; i++)
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for (i = 0; i < cur_nb_taps; i++)
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power += time[i] * time[i];
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}
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s->gain = sqrtf(ch / power);
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@ -495,17 +533,17 @@ static int convert_coeffs(AVFilterContext *ctx)
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s->gain = FFMIN(s->gain * s->ir_gain, 1.f);
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av_log(ctx, AV_LOG_DEBUG, "power %f, gain %f\n", power, s->gain);
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for (ch = 0; ch < ctx->inputs[1]->channels; ch++) {
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float *time = (float *)s->ir[0]->extended_data[!s->one2many * ch];
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for (ch = 0; ch < ctx->inputs[1 + s->selir]->channels; ch++) {
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float *time = (float *)s->ir[s->selir]->extended_data[!s->one2many * ch];
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s->fdsp->vector_fmul_scalar(time, time, s->gain, FFALIGN(s->nb_taps, 4));
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s->fdsp->vector_fmul_scalar(time, time, s->gain, FFALIGN(cur_nb_taps, 4));
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}
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av_log(ctx, AV_LOG_DEBUG, "nb_taps: %d\n", s->nb_taps);
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av_log(ctx, AV_LOG_DEBUG, "nb_taps: %d\n", cur_nb_taps);
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av_log(ctx, AV_LOG_DEBUG, "nb_segments: %d\n", s->nb_segments);
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for (ch = 0; ch < ctx->inputs[1]->channels; ch++) {
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float *time = (float *)s->ir[0]->extended_data[!s->one2many * ch];
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for (ch = 0; ch < ctx->inputs[1 + s->selir]->channels; ch++) {
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float *time = (float *)s->ir[s->selir]->extended_data[!s->one2many * ch];
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int toffset = 0;
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for (i = FFMAX(1, s->length * s->nb_taps); i < s->nb_taps; i++)
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@ -561,7 +599,6 @@ static int convert_coeffs(AVFilterContext *ctx)
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}
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}
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av_frame_free(&s->ir[0]);
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s->have_coeffs = 1;
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return 0;
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@ -594,26 +631,26 @@ static int activate(AVFilterContext *ctx)
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FF_FILTER_FORWARD_STATUS_BACK_ALL(ctx->outputs[0], ctx);
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if (s->response)
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FF_FILTER_FORWARD_STATUS_BACK_ALL(ctx->outputs[1], ctx);
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if (!s->eof_coeffs) {
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if (!s->eof_coeffs[s->selir]) {
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AVFrame *ir = NULL;
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ret = check_ir(ctx->inputs[1], ir);
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ret = check_ir(ctx->inputs[1 + s->selir], ir);
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if (ret < 0)
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return ret;
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if (ff_outlink_get_status(ctx->inputs[1]) == AVERROR_EOF)
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s->eof_coeffs = 1;
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if (ff_outlink_get_status(ctx->inputs[1 + s->selir]) == AVERROR_EOF)
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s->eof_coeffs[s->selir] = 1;
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if (!s->eof_coeffs) {
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if (!s->eof_coeffs[s->selir]) {
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if (ff_outlink_frame_wanted(ctx->outputs[0]))
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ff_inlink_request_frame(ctx->inputs[1]);
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ff_inlink_request_frame(ctx->inputs[1 + s->selir]);
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else if (s->response && ff_outlink_frame_wanted(ctx->outputs[1]))
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ff_inlink_request_frame(ctx->inputs[1]);
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ff_inlink_request_frame(ctx->inputs[1 + s->selir]);
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return 0;
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}
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}
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if (!s->have_coeffs && s->eof_coeffs) {
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if (!s->have_coeffs && s->eof_coeffs[s->selir]) {
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ret = convert_coeffs(ctx);
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if (ret < 0)
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return ret;
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@ -709,8 +746,10 @@ static int query_formats(AVFilterContext *ctx)
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return ret;
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if ((ret = ff_channel_layouts_ref(layouts, &ctx->outputs[0]->in_channel_layouts)) < 0)
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return ret;
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if ((ret = ff_channel_layouts_ref(mono, &ctx->inputs[1]->out_channel_layouts)) < 0)
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return ret;
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for (int i = 1; i < ctx->nb_inputs; i++) {
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if ((ret = ff_channel_layouts_ref(mono, &ctx->inputs[i]->out_channel_layouts)) < 0)
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return ret;
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}
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}
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formats = ff_make_format_list(sample_fmts);
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@ -726,49 +765,19 @@ static int config_output(AVFilterLink *outlink)
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AVFilterContext *ctx = outlink->src;
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AudioFIRContext *s = ctx->priv;
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s->one2many = ctx->inputs[1]->channels == 1;
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s->one2many = ctx->inputs[1 + s->selir]->channels == 1;
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outlink->sample_rate = ctx->inputs[0]->sample_rate;
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outlink->time_base = ctx->inputs[0]->time_base;
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outlink->channel_layout = ctx->inputs[0]->channel_layout;
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outlink->channels = ctx->inputs[0]->channels;
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s->nb_channels = outlink->channels;
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s->nb_coef_channels = ctx->inputs[1]->channels;
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s->nb_coef_channels = ctx->inputs[1 + s->selir]->channels;
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s->pts = AV_NOPTS_VALUE;
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return 0;
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}
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static void uninit_segment(AVFilterContext *ctx, AudioFIRSegment *seg)
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{
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AudioFIRContext *s = ctx->priv;
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if (seg->rdft) {
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for (int ch = 0; ch < s->nb_channels; ch++) {
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av_rdft_end(seg->rdft[ch]);
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}
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}
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av_freep(&seg->rdft);
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if (seg->irdft) {
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for (int ch = 0; ch < s->nb_channels; ch++) {
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av_rdft_end(seg->irdft[ch]);
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}
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}
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av_freep(&seg->irdft);
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av_freep(&seg->output_offset);
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av_freep(&seg->part_index);
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av_frame_free(&seg->block);
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av_frame_free(&seg->sum);
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av_frame_free(&seg->buffer);
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av_frame_free(&seg->coeff);
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av_frame_free(&seg->input);
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av_frame_free(&seg->output);
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seg->input_size = 0;
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}
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static av_cold void uninit(AVFilterContext *ctx)
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{
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AudioFIRContext *s = ctx->priv;
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@ -778,7 +787,13 @@ static av_cold void uninit(AVFilterContext *ctx)
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}
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av_freep(&s->fdsp);
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av_frame_free(&s->ir[0]);
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for (int i = 0; i < s->nb_irs; i++) {
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av_frame_free(&s->ir[i]);
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}
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for (int i = 0; i < ctx->nb_inputs; i++)
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av_freep(&ctx->input_pads[i].name);
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for (int i = 0; i < ctx->nb_outputs; i++)
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av_freep(&ctx->output_pads[i].name);
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@ -818,7 +833,37 @@ static av_cold int init(AVFilterContext *ctx)
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AVFilterPad pad, vpad;
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int ret;
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pad = (AVFilterPad){
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pad = (AVFilterPad) {
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.name = av_strdup("main"),
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.type = AVMEDIA_TYPE_AUDIO,
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};
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if (!pad.name)
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return AVERROR(ENOMEM);
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ret = ff_insert_inpad(ctx, 0, &pad);
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if (ret < 0) {
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av_freep(&pad.name);
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return ret;
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}
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for (int n = 0; n < s->nb_irs; n++) {
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pad = (AVFilterPad) {
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.name = av_asprintf("ir%d", n),
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.type = AVMEDIA_TYPE_AUDIO,
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};
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if (!pad.name)
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return AVERROR(ENOMEM);
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ret = ff_insert_inpad(ctx, n + 1, &pad);
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if (ret < 0) {
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av_freep(&pad.name);
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return ret;
|
||||
}
|
||||
}
|
||||
|
||||
pad = (AVFilterPad) {
|
||||
.name = av_strdup("default"),
|
||||
.type = AVMEDIA_TYPE_AUDIO,
|
||||
.config_props = config_output,
|
||||
|
|
@ -860,18 +905,31 @@ static av_cold int init(AVFilterContext *ctx)
|
|||
return 0;
|
||||
}
|
||||
|
||||
static const AVFilterPad afir_inputs[] = {
|
||||
{
|
||||
.name = "main",
|
||||
.type = AVMEDIA_TYPE_AUDIO,
|
||||
},{
|
||||
.name = "ir",
|
||||
.type = AVMEDIA_TYPE_AUDIO,
|
||||
},
|
||||
{ NULL }
|
||||
};
|
||||
static int process_command(AVFilterContext *ctx,
|
||||
const char *cmd,
|
||||
const char *arg,
|
||||
char *res,
|
||||
int res_len,
|
||||
int flags)
|
||||
{
|
||||
AudioFIRContext *s = ctx->priv;
|
||||
int prev_ir = s->selir;
|
||||
int ret = ff_filter_process_command(ctx, cmd, arg, res, res_len, flags);
|
||||
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
s->selir = FFMIN(s->nb_irs - 1, s->selir);
|
||||
|
||||
if (prev_ir != s->selir) {
|
||||
s->have_coeffs = 0;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#define AF AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
|
||||
#define AFR AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
|
||||
#define VF AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
|
||||
#define OFFSET(x) offsetof(AudioFIRContext, x)
|
||||
|
||||
|
|
@ -895,6 +953,8 @@ static const AVOption afir_options[] = {
|
|||
{ "rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT32_MAX, VF },
|
||||
{ "minp", "set min partition size", OFFSET(minp), AV_OPT_TYPE_INT, {.i64=8192}, 1, 32768, AF },
|
||||
{ "maxp", "set max partition size", OFFSET(maxp), AV_OPT_TYPE_INT, {.i64=8192}, 8, 32768, AF },
|
||||
{ "nbirs", "set number of input IRs",OFFSET(nb_irs),AV_OPT_TYPE_INT, {.i64=1}, 1, 32, AF },
|
||||
{ "ir", "select IR", OFFSET(selir), AV_OPT_TYPE_INT, {.i64=0}, 0, 31, AFR },
|
||||
{ NULL }
|
||||
};
|
||||
|
||||
|
|
@ -902,14 +962,15 @@ AVFILTER_DEFINE_CLASS(afir);
|
|||
|
||||
AVFilter ff_af_afir = {
|
||||
.name = "afir",
|
||||
.description = NULL_IF_CONFIG_SMALL("Apply Finite Impulse Response filter with supplied coefficients in 2nd stream."),
|
||||
.description = NULL_IF_CONFIG_SMALL("Apply Finite Impulse Response filter with supplied coefficients in additional stream(s)."),
|
||||
.priv_size = sizeof(AudioFIRContext),
|
||||
.priv_class = &afir_class,
|
||||
.query_formats = query_formats,
|
||||
.init = init,
|
||||
.activate = activate,
|
||||
.uninit = uninit,
|
||||
.inputs = afir_inputs,
|
||||
.flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS |
|
||||
.process_command = process_command,
|
||||
.flags = AVFILTER_FLAG_DYNAMIC_INPUTS |
|
||||
AVFILTER_FLAG_DYNAMIC_OUTPUTS |
|
||||
AVFILTER_FLAG_SLICE_THREADS,
|
||||
};
|
||||
|
|
|
|||
|
|
@ -74,10 +74,12 @@ typedef struct AudioFIRContext {
|
|||
int ir_channel;
|
||||
int minp;
|
||||
int maxp;
|
||||
int nb_irs;
|
||||
int selir;
|
||||
|
||||
float gain;
|
||||
|
||||
int eof_coeffs;
|
||||
int eof_coeffs[32];
|
||||
int have_coeffs;
|
||||
int nb_taps;
|
||||
int nb_channels;
|
||||
|
|
|
|||
Loading…
Reference in New Issue