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-rw-r--r--libavfilter/avf_showvolume.c347
1 files changed, 347 insertions, 0 deletions
diff --git a/libavfilter/avf_showvolume.c b/libavfilter/avf_showvolume.c
new file mode 100644
index 0000000000..bcdbccb0ee
--- /dev/null
+++ b/libavfilter/avf_showvolume.c
@@ -0,0 +1,347 @@
+/*
+ * Copyright (c) 2015 Paul B Mahol
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/avstring.h"
+#include "libavutil/channel_layout.h"
+#include "libavutil/eval.h"
+#include "libavutil/intreadwrite.h"
+#include "libavutil/opt.h"
+#include "libavutil/parseutils.h"
+#include "libavutil/xga_font_data.h"
+#include "avfilter.h"
+#include "formats.h"
+#include "audio.h"
+#include "video.h"
+#include "internal.h"
+
+static const char *const var_names[] = { "VOLUME", "CHANNEL", NULL };
+enum { VAR_VOLUME, VAR_CHANNEL, VAR_VARS_NB };
+
+typedef struct ShowVolumeContext {
+ const AVClass *class;
+ int w, h;
+ int b;
+ double f;
+ AVRational frame_rate;
+ char *color;
+ int orientation;
+ int step;
+
+ AVFrame *out;
+ AVExpr *c_expr;
+ int draw_text;
+ int draw_volume;
+ double *values;
+} ShowVolumeContext;
+
+#define OFFSET(x) offsetof(ShowVolumeContext, x)
+#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
+
+static const AVOption showvolume_options[] = {
+ { "rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, 0, FLAGS },
+ { "r", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, 0, FLAGS },
+ { "b", "set border width", OFFSET(b), AV_OPT_TYPE_INT, {.i64=1}, 0, 5, FLAGS },
+ { "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="if(gte(VOLUME,-6), if(gte(VOLUME,-2), if(gte(VOLUME,-1), if(gt(VOLUME,0), 0xff0000ff, 0xff0066ff), 0xff00ffff),0xff00ff00),0xffff0000)"}, 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" },
+ { "h", "horizontal", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "orientation" },
+ { "v", "vertical", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "orientation" },
+ { "s", "set step size", OFFSET(step), AV_OPT_TYPE_INT, {.i64=0}, 0, 5, FLAGS },
+ { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(showvolume);
+
+static av_cold int init(AVFilterContext *ctx)
+{
+ ShowVolumeContext *s = ctx->priv;
+ int ret;
+
+ if (s->color) {
+ ret = av_expr_parse(&s->c_expr, s->color, var_names,
+ NULL, NULL, NULL, NULL, 0, ctx);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int query_formats(AVFilterContext *ctx)
+{
+ AVFilterFormats *formats = NULL;
+ AVFilterChannelLayouts *layouts = NULL;
+ AVFilterLink *inlink = ctx->inputs[0];
+ AVFilterLink *outlink = ctx->outputs[0];
+ static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE };
+ static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_RGBA, AV_PIX_FMT_NONE };
+ int ret;
+
+ formats = ff_make_format_list(sample_fmts);
+ if ((ret = ff_formats_ref(formats, &inlink->out_formats)) < 0)
+ return ret;
+
+ layouts = ff_all_channel_counts();
+ if ((ret = ff_channel_layouts_ref(layouts, &inlink->out_channel_layouts)) < 0)
+ return ret;
+
+ formats = ff_all_samplerates();
+ if ((ret = ff_formats_ref(formats, &inlink->out_samplerates)) < 0)
+ return ret;
+
+ formats = ff_make_format_list(pix_fmts);
+ if ((ret = ff_formats_ref(formats, &outlink->in_formats)) < 0)
+ return ret;
+
+ return 0;
+}
+
+static int config_input(AVFilterLink *inlink)
+{
+ AVFilterContext *ctx = inlink->dst;
+ ShowVolumeContext *s = ctx->priv;
+ int nb_samples;
+
+ nb_samples = FFMAX(1024, ((double)inlink->sample_rate / av_q2d(s->frame_rate)) + 0.5);
+ inlink->partial_buf_size =
+ inlink->min_samples =
+ inlink->max_samples = nb_samples;
+ s->values = av_calloc(inlink->channels * VAR_VARS_NB, sizeof(double));
+ if (!s->values)
+ return AVERROR(ENOMEM);
+ return 0;
+}
+
+static int config_output(AVFilterLink *outlink)
+{
+ ShowVolumeContext *s = outlink->src->priv;
+ AVFilterLink *inlink = outlink->src->inputs[0];
+
+ if (s->orientation) {
+ outlink->h = s->w;
+ outlink->w = s->h * inlink->channels + (inlink->channels - 1) * s->b;
+ } else {
+ outlink->w = s->w;
+ outlink->h = s->h * inlink->channels + (inlink->channels - 1) * s->b;
+ }
+
+ outlink->sample_aspect_ratio = (AVRational){1,1};
+ outlink->frame_rate = s->frame_rate;
+
+ return 0;
+}
+
+static void drawtext(AVFrame *pic, int x, int y, const char *txt, int o)
+{
+ const uint8_t *font;
+ int font_height;
+ int i;
+
+ font = avpriv_cga_font, font_height = 8;
+
+ for (i = 0; txt[i]; i++) {
+ int char_y, mask;
+
+ if (o) {
+ for (char_y = font_height - 1; char_y >= 0; char_y--) {
+ uint8_t *p = pic->data[0] + (y + i * 10) * pic->linesize[0] + x * 4;
+ for (mask = 0x80; mask; mask >>= 1) {
+ if (font[txt[i] * font_height + font_height - 1 - char_y] & mask)
+ AV_WN32(&p[char_y * 4], ~AV_RN32(&p[char_y * 4]));
+ p += pic->linesize[0];
+ }
+ }
+ } else {
+ uint8_t *p = pic->data[0] + y * pic->linesize[0] + (x + i * 8) * 4;
+ for (char_y = 0; char_y < font_height; char_y++) {
+ for (mask = 0x80; mask; mask >>= 1) {
+ if (font[txt[i] * font_height + char_y] & mask)
+ AV_WN32(p, ~AV_RN32(p));
+ p += 4;
+ }
+ p += pic->linesize[0] - 8 * 4;
+ }
+ }
+ }
+}
+
+static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
+{
+ AVFilterContext *ctx = inlink->dst;
+ AVFilterLink *outlink = ctx->outputs[0];
+ ShowVolumeContext *s = ctx->priv;
+ const int step = s->step;
+ int c, i, j, k;
+ AVFrame *out;
+
+ if (!s->out || s->out->width != outlink->w ||
+ s->out->height != outlink->h) {
+ av_frame_free(&s->out);
+ s->out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
+ if (!s->out) {
+ av_frame_free(&insamples);
+ return AVERROR(ENOMEM);
+ }
+
+ for (i = 0; i < outlink->h; i++)
+ memset(s->out->data[0] + i * s->out->linesize[0], 0, outlink->w * 4);
+ }
+ s->out->pts = insamples->pts;
+
+ for (j = 0; j < outlink->h; j++) {
+ uint8_t *dst = s->out->data[0] + j * s->out->linesize[0];
+ for (k = 0; k < outlink->w; k++) {
+ dst[k * 4 + 0] = FFMAX(dst[k * 4 + 0] * s->f, 0);
+ dst[k * 4 + 1] = FFMAX(dst[k * 4 + 1] * s->f, 0);
+ dst[k * 4 + 2] = FFMAX(dst[k * 4 + 2] * s->f, 0);
+ dst[k * 4 + 3] = FFMAX(dst[k * 4 + 3] * s->f, 0);
+ }
+ }
+
+ if (s->orientation) {
+ for (c = 0; c < inlink->channels; c++) {
+ float *src = (float *)insamples->extended_data[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_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++) {
+ 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);
+ if (j & step)
+ j += step;
+ }
+ }
+
+ if (outlink->h > 40 && s->draw_text) {
+ const char *channel_name = av_get_channel_name(av_channel_layout_extract_channel(insamples->channel_layout, c));
+ if (!channel_name)
+ continue;
+ drawtext(s->out, c * (s->h + s->b) + (s->h - 10) / 2, outlink->h - 35, channel_name, 1);
+ }
+ }
+ } else {
+ for (c = 0; c < inlink->channels; c++) {
+ float *src = (float *)insamples->extended_data[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_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);
+ if (k & step)
+ k += step;
+ }
+ }
+
+ 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;
+ drawtext(s->out, 2, c * (s->h + s->b) + (s->h - 8) / 2, channel_name, 0);
+ }
+ }
+ }
+
+ av_frame_free(&insamples);
+ out = av_frame_clone(s->out);
+ if (!out)
+ return AVERROR(ENOMEM);
+ av_frame_make_writable(out);
+
+ for (c = 0; c < inlink->channels && s->draw_volume; c++) {
+ char buf[16];
+ if (s->orientation) {
+ if (s->h >= 8) {
+ snprintf(buf, sizeof(buf), "%.2f", s->values[c * VAR_VARS_NB + VAR_VOLUME]);
+ drawtext(out, c * (s->h + s->b) + (s->h - 8) / 2, 2, buf, 1);
+ }
+ } else {
+ if (s->h >= 8) {
+ snprintf(buf, sizeof(buf), "%.2f", s->values[c * VAR_VARS_NB + VAR_VOLUME]);
+ drawtext(out, FFMAX(0, s->w - 8 * (int)strlen(buf)), c * (s->h + s->b) + (s->h - 8) / 2, buf, 0);
+ }
+ }
+ }
+
+ return ff_filter_frame(outlink, out);
+}
+
+static av_cold void uninit(AVFilterContext *ctx)
+{
+ ShowVolumeContext *s = ctx->priv;
+
+ av_frame_free(&s->out);
+ av_expr_free(s->c_expr);
+ av_freep(&s->values);
+}
+
+static const AVFilterPad showvolume_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_AUDIO,
+ .config_props = config_input,
+ .filter_frame = filter_frame,
+ },
+ { NULL }
+};
+
+static const AVFilterPad showvolume_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = config_output,
+ },
+ { NULL }
+};
+
+AVFilter ff_avf_showvolume = {
+ .name = "showvolume",
+ .description = NULL_IF_CONFIG_SMALL("Convert input audio volume to video output."),
+ .init = init,
+ .uninit = uninit,
+ .query_formats = query_formats,
+ .priv_size = sizeof(ShowVolumeContext),
+ .inputs = showvolume_inputs,
+ .outputs = showvolume_outputs,
+ .priv_class = &showvolume_class,
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-02 08:23:03 +0000