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avfilter/af_headphone: improve performance and reduce latency 

Remove not needed code.

Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2018-04-14 17:25:06 +02:00
parent 18d6ff2b42
commit 2b0f821f51
2 changed files with 6 additions and 12 deletions
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4
doc/filters.texi
View File

@ -3175,6 +3175,10 @@ Default is @var{freq}.
@item lfe
Set custom gain for LFE channels. Value is in dB. Default is 0.
@item size
Set size of frame in number of samples which will be processed at once.
Default value is @var{1024}. Allowed range is from 1024 to 96000.
@end table
@subsection Examples

14
libavfilter/af_headphone.c
View File

@ -404,7 +404,7 @@ static int convert_coeffs(AVFilterContext *ctx, AVFilterLink *inlink)
int i, j;
s->buffer_length = 1 << (32 - ff_clz(s->ir_len));
s->n_fft = n_fft = 1 << (32 - ff_clz(s->ir_len + inlink->sample_rate));
s->n_fft = n_fft = 1 << (32 - ff_clz(s->ir_len + s->size));
if (s->type == FREQUENCY_DOMAIN) {
fft_in_l = av_calloc(n_fft, sizeof(*fft_in_l));
@ -650,12 +650,6 @@ static int config_input(AVFilterLink *inlink)
AVFilterContext *ctx = inlink->dst;
HeadphoneContext *s = ctx->priv;
if (s->type == FREQUENCY_DOMAIN) {
inlink->partial_buf_size =
inlink->min_samples =
inlink->max_samples = inlink->sample_rate;
}
if (s->nb_irs < inlink->channels) {
av_log(ctx, AV_LOG_ERROR, "Number of inputs must be >= %d.\n", inlink->channels + 1);
return AVERROR(EINVAL);
@ -719,11 +713,6 @@ static int config_output(AVFilterLink *outlink)
AVFilterLink *inlink = ctx->inputs[0];
int i;
if (s->type == TIME_DOMAIN)
s->size = 1024;
else
s->size = inlink->sample_rate;
for (i = 0; i < s->nb_inputs; i++) {
s->in[i].fifo = av_audio_fifo_alloc(ctx->inputs[i]->format, ctx->inputs[i]->channels, 1024);
if (!s->in[i].fifo)
@ -798,6 +787,7 @@ static const AVOption headphone_options[] = {
{ "type", "set processing", OFFSET(type), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, .flags = FLAGS, "type" },
{ "time", "time domain", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, .flags = FLAGS, "type" },
{ "freq", "frequency domain", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, .flags = FLAGS, "type" },
{ "size", "set frame size", OFFSET(size), AV_OPT_TYPE_INT, {.i64=1024},1024,96000, .flags = FLAGS },
{ NULL }
};