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avfilter/af_sofalizer: add framesize option

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This commit is contained in:
Paul B Mahol 2018-12-20 20:22:36 +01:00
parent d06aae732c
commit d6951e595a
2 changed files with 9 additions and 2 deletions
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5
doc/filters.texi
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@ -4506,6 +4506,11 @@ Descriptions with unrecognised channel names are ignored.
@item lfegain
Set custom gain for LFE channels. Value is in dB. Default is 0.
@item framesize
Set custom frame size in number of samples. Default is 1024.
Allowed range is from 1024 to 96000. Only used if option @samp{type}
is set to @var{freq}.
@end table
@subsection Examples

6
libavfilter/af_sofalizer.c
View File

@ -92,6 +92,7 @@ typedef struct SOFAlizerContext {
float elevation; /* elevation of virtual loudspeakers (in deg.) */
float radius; /* distance virtual loudspeakers to listener (in metres) */
int type; /* processing type */
int framesize; /* size of buffer */
VirtualSpeaker vspkrpos[64];
@ -662,7 +663,7 @@ static int load_data(AVFilterContext *ctx, int azim, int elev, float radius, int
/* buffer length is longest IR plus max. delay -> next power of 2
(32 - count leading zeros gives required exponent) */
s->buffer_length = 1 << (32 - ff_clz(n_max));
s->n_fft = n_fft = 1 << (32 - ff_clz(n_max + sample_rate));
s->n_fft = n_fft = 1 << (32 - ff_clz(n_max + s->framesize));
if (s->type == FREQUENCY_DOMAIN) {
av_fft_end(s->fft[0]);
@ -823,7 +824,7 @@ static int config_input(AVFilterLink *inlink)
if (s->type == FREQUENCY_DOMAIN) {
inlink->partial_buf_size =
inlink->min_samples =
inlink->max_samples = inlink->sample_rate;
inlink->max_samples = s->framesize;
}
/* gain -3 dB per channel, -6 dB to get LFE on a similar level */
@ -881,6 +882,7 @@ static const AVOption sofalizer_options[] = {
{ "freq", "frequency domain", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, .flags = FLAGS, "type" },
{ "speakers", "set speaker custom positions", OFFSET(speakers_pos), AV_OPT_TYPE_STRING, {.str=0}, 0, 0, .flags = FLAGS },
{ "lfegain", "set lfe gain", OFFSET(lfe_gain), AV_OPT_TYPE_FLOAT, {.dbl=0}, -9, 9, .flags = FLAGS },
{ "framesize", "set frame size", OFFSET(framesize), AV_OPT_TYPE_INT, {.i64=1024},1024,96000, .flags = FLAGS },
{ NULL }
};