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avfilter/avf_showvolume: calculate color table only once

This commit is contained in:
Paul B Mahol 2016-08-21 16:46:21 +02:00
parent 445c30ba07
commit 45e5d5f547
1 changed files with 28 additions and 13 deletions
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41
libavfilter/avf_showvolume.c
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@ -49,6 +49,7 @@ typedef struct ShowVolumeContext {
int draw_text;
int draw_volume;
double *values;
uint32_t *color_lut;
} ShowVolumeContext;
#define OFFSET(x) offsetof(ShowVolumeContext, x)
@ -61,7 +62,7 @@ static const AVOption showvolume_options[] = {
{ "w", "set channel width", OFFSET(w), AV_OPT_TYPE_INT, {.i64=400}, 80, 8192, FLAGS },
{ "h", "set channel height", OFFSET(h), AV_OPT_TYPE_INT, {.i64=20}, 1, 900, FLAGS },
{ "f", "set fade", OFFSET(f), AV_OPT_TYPE_DOUBLE, {.dbl=0.95}, 0.001, 1, FLAGS },
{ "c", "set volume color expression", OFFSET(color), AV_OPT_TYPE_STRING, {.str="PEAK*255+floor((1-PEAK)*255)*256"}, 0, 0, FLAGS },
{ "c", "set volume color expression", OFFSET(color), AV_OPT_TYPE_STRING, {.str="PEAK*255+floor((1-PEAK)*255)*256+0xff000000"}, 0, 0, FLAGS },
{ "t", "display channel names", OFFSET(draw_text), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS },
{ "v", "display volume value", OFFSET(draw_volume), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS },
{ "o", "set orientation", OFFSET(orientation), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "orientation" },
@ -130,6 +131,11 @@ static int config_input(AVFilterLink *inlink)
s->values = av_calloc(inlink->channels * VAR_VARS_NB, sizeof(double));
if (!s->values)
return AVERROR(ENOMEM);
s->color_lut = av_calloc(s->w, sizeof(*s->color_lut) * inlink->channels);
if (!s->color_lut)
return AVERROR(ENOMEM);
return 0;
}
@ -137,6 +143,7 @@ static int config_output(AVFilterLink *outlink)
{
ShowVolumeContext *s = outlink->src->priv;
AVFilterLink *inlink = outlink->src->inputs[0];
int ch;
if (s->orientation) {
outlink->h = s->w;
@ -149,6 +156,19 @@ static int config_output(AVFilterLink *outlink)
outlink->sample_aspect_ratio = (AVRational){1,1};
outlink->frame_rate = s->frame_rate;
for (ch = 0; ch < inlink->channels; ch++) {
int i;
for (i = 0; i < s->w; i++) {
float max = i / (float)(s->w - 1);
s->values[ch * VAR_VARS_NB + VAR_PEAK] = max;
s->values[ch * VAR_VARS_NB + VAR_VOLUME] = 20.0 * log10(max);
s->values[ch * VAR_VARS_NB + VAR_CHANNEL] = ch;
s->color_lut[ch * s->w + i] = av_expr_eval(s->c_expr, &s->values[ch * VAR_VARS_NB], NULL);
}
}
return 0;
}
@ -222,28 +242,25 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
if (s->orientation) {
for (c = 0; c < inlink->channels; c++) {
float *src = (float *)insamples->extended_data[c];
uint32_t *lut = s->color_lut + s->w * c;
float max = 0;
uint32_t color;
for (i = 0; i < insamples->nb_samples; i++)
max = FFMAX(max, src[i]);
s->values[c * VAR_VARS_NB + VAR_PEAK] = max;
s->values[c * VAR_VARS_NB + VAR_VOLUME] = 20.0 * log10(max);
max = av_clipf(max, 0, 1);
s->values[c * VAR_VARS_NB + VAR_CHANNEL] = c;
color = av_expr_eval(s->c_expr, &s->values[c * VAR_VARS_NB], NULL);
for (j = outlink->h - outlink->h * max; j < outlink->h; j++) {
for (j = outlink->h - outlink->h * max; j < s->w; j++) {
uint8_t *dst = s->out->data[0] + j * s->out->linesize[0] + c * (s->b + s->h) * 4;
for (k = 0; k < s->h; k++) {
AV_WN32A(&dst[k * 4], color);
AV_WN32A(&dst[k * 4], lut[s->w - j - 1]);
if (j & step)
j += step;
}
}
if (outlink->h > 40 && s->draw_text) {
if (s->h >= 8 && s->draw_text) {
const char *channel_name = av_get_channel_name(av_channel_layout_extract_channel(insamples->channel_layout, c));
if (!channel_name)
continue;
@ -253,23 +270,20 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
} else {
for (c = 0; c < inlink->channels; c++) {
float *src = (float *)insamples->extended_data[c];
uint32_t *lut = s->color_lut + s->w * c;
float max = 0;
uint32_t color;
for (i = 0; i < insamples->nb_samples; i++)
max = FFMAX(max, src[i]);
s->values[c * VAR_VARS_NB + VAR_PEAK] = max;
s->values[c * VAR_VARS_NB + VAR_VOLUME] = 20.0 * log10(max);
max = av_clipf(max, 0, 1);
s->values[c * VAR_VARS_NB + VAR_CHANNEL] = c;
color = av_expr_eval(s->c_expr, &s->values[c * VAR_VARS_NB], NULL);
for (j = 0; j < s->h; j++) {
uint8_t *dst = s->out->data[0] + (c * s->h + c * s->b + j) * s->out->linesize[0];
for (k = 0; k < s->w * max; k++) {
AV_WN32A(dst + k * 4, color);
AV_WN32A(dst + k * 4, lut[k]);
if (k & step)
k += step;
}
@ -315,6 +329,7 @@ static av_cold void uninit(AVFilterContext *ctx)
av_frame_free(&s->out);
av_expr_free(s->c_expr);
av_freep(&s->values);
av_freep(&s->color_lut);
}
static const AVFilterPad showvolume_inputs[] = {