274 lines
8.4 KiB
C
274 lines
8.4 KiB
C
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/*
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* Copyright (c) 2016 Paul B Mahol
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/avassert.h"
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#include "libavutil/avstring.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/opt.h"
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#include "libavutil/parseutils.h"
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#include "avfilter.h"
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#include "filters.h"
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#include "formats.h"
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#include "audio.h"
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#include "video.h"
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#include "internal.h"
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typedef struct AudioBitScopeContext {
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const AVClass *class;
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int w, h;
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AVRational frame_rate;
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char *colors;
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int nb_channels;
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int nb_samples;
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int depth;
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uint8_t *fg;
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uint64_t counter[64];
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} AudioBitScopeContext;
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#define OFFSET(x) offsetof(AudioBitScopeContext, x)
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
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static const AVOption abitscope_options[] = {
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{ "rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
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{ "r", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
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{ "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="1024x256"}, 0, 0, FLAGS },
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{ "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="1024x256"}, 0, 0, FLAGS },
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{ "colors", "set channels colors", OFFSET(colors), AV_OPT_TYPE_STRING, {.str = "red|green|blue|yellow|orange|lime|pink|magenta|brown" }, 0, 0, FLAGS },
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{ NULL }
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};
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AVFILTER_DEFINE_CLASS(abitscope);
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static int query_formats(AVFilterContext *ctx)
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{
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AVFilterFormats *formats = NULL;
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AVFilterChannelLayouts *layouts;
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AVFilterLink *inlink = ctx->inputs[0];
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AVFilterLink *outlink = ctx->outputs[0];
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static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_S16P, AV_SAMPLE_FMT_S32P, AV_SAMPLE_FMT_NONE };
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static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_RGBA, AV_PIX_FMT_NONE };
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int ret;
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formats = ff_make_format_list(sample_fmts);
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if ((ret = ff_formats_ref(formats, &inlink->out_formats)) < 0)
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return ret;
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layouts = ff_all_channel_counts();
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if (!layouts)
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return AVERROR(ENOMEM);
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if ((ret = ff_channel_layouts_ref(layouts, &inlink->out_channel_layouts)) < 0)
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return ret;
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formats = ff_all_samplerates();
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if ((ret = ff_formats_ref(formats, &inlink->out_samplerates)) < 0)
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return ret;
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formats = ff_make_format_list(pix_fmts);
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if ((ret = ff_formats_ref(formats, &outlink->in_formats)) < 0)
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return ret;
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return 0;
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}
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static int config_input(AVFilterLink *inlink)
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{
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AVFilterContext *ctx = inlink->dst;
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AudioBitScopeContext *s = ctx->priv;
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int ch;
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char *colors, *saveptr = NULL;
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s->nb_samples = FFMAX(1, av_rescale(inlink->sample_rate, s->frame_rate.den, s->frame_rate.num));
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s->nb_channels = inlink->channels;
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s->depth = inlink->format == AV_SAMPLE_FMT_S16P ? 16 : 32;
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s->fg = av_malloc_array(s->nb_channels, 4 * sizeof(*s->fg));
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if (!s->fg)
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return AVERROR(ENOMEM);
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colors = av_strdup(s->colors);
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if (!colors)
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return AVERROR(ENOMEM);
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for (ch = 0; ch < s->nb_channels; ch++) {
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uint8_t fg[4] = { 0xff, 0xff, 0xff, 0xff };
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char *color;
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color = av_strtok(ch == 0 ? colors : NULL, " |", &saveptr);
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if (color)
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av_parse_color(fg, color, -1, ctx);
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s->fg[4 * ch + 0] = fg[0];
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s->fg[4 * ch + 1] = fg[1];
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s->fg[4 * ch + 2] = fg[2];
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s->fg[4 * ch + 3] = fg[3];
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}
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av_free(colors);
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return 0;
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}
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static int config_output(AVFilterLink *outlink)
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{
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AudioBitScopeContext *s = outlink->src->priv;
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outlink->w = s->w;
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outlink->h = s->h;
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outlink->sample_aspect_ratio = (AVRational){1,1};
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outlink->frame_rate = s->frame_rate;
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return 0;
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}
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static void count_bits(AudioBitScopeContext *s, uint32_t sample, int max)
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{
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int i;
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for (i = 0; i < max; i++) {
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if (sample & (1U << i))
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s->counter[i]++;
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}
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}
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static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
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{
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AVFilterContext *ctx = inlink->dst;
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AVFilterLink *outlink = ctx->outputs[0];
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AudioBitScopeContext *s = ctx->priv;
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AVFrame *outpicref;
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int ch, i, j, b;
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outpicref = ff_get_video_buffer(outlink, outlink->w, outlink->h);
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if (!outpicref) {
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av_frame_free(&insamples);
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return AVERROR(ENOMEM);
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}
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for (i = 0; i < outlink->h; i++)
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memset(outpicref->data[0] + i * outpicref->linesize[0], 0, outlink->w * 4);
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outpicref->pts = insamples->pts;
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outpicref->sample_aspect_ratio = (AVRational){1,1};
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switch (insamples->format) {
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case AV_SAMPLE_FMT_S16P:
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for (ch = 0; ch < inlink->channels; ch++) {
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uint16_t *in = (uint16_t *)insamples->extended_data[ch];
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int w = outpicref->width / inlink->channels;
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int h = outpicref->height / 16;
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uint32_t color = AV_RN32(&s->fg[4 * ch]);
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memset(s->counter, 0, sizeof(s->counter));
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for (i = 0; i < insamples->nb_samples; i++)
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count_bits(s, in[i], 16);
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for (b = 0; b < 16; b++) {
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for (j = 1; j < h - 1; j++) {
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uint8_t *dst = outpicref->data[0] + (b * h + j) * outpicref->linesize[0] + w * ch * 4;
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int ww = (s->counter[16 - b - 1] / (float)insamples->nb_samples) * (w - 1);
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for (i = 0; i < ww; i++) {
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AV_WN32(&dst[i * 4], color);
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}
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}
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}
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}
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break;
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case AV_SAMPLE_FMT_S32P:
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for (ch = 0; ch < inlink->channels; ch++) {
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uint32_t *in = (uint32_t *)insamples->extended_data[ch];
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int w = outpicref->width / inlink->channels;
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int h = outpicref->height / 32;
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uint32_t color = AV_RN32(&s->fg[4 * ch]);
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memset(s->counter, 0, sizeof(s->counter));
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for (i = 0; i < insamples->nb_samples; i++)
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count_bits(s, in[i], 32);
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for (b = 0; b < 32; b++) {
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for (j = 1; j < h - 1; j++) {
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uint8_t *dst = outpicref->data[0] + (b * h + j) * outpicref->linesize[0] + w * ch * 4;
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int ww = (s->counter[32 - b - 1] / (float)insamples->nb_samples) * (w - 1);
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for (i = 0; i < ww; i++) {
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AV_WN32(&dst[i * 4], color);
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}
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}
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}
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}
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break;
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}
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av_frame_free(&insamples);
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return ff_filter_frame(outlink, outpicref);
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}
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static int activate(AVFilterContext *ctx)
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{
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AVFilterLink *inlink = ctx->inputs[0];
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AVFilterLink *outlink = ctx->outputs[0];
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AudioBitScopeContext *s = ctx->priv;
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AVFrame *in;
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int ret;
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FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
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ret = ff_inlink_consume_samples(inlink, s->nb_samples, s->nb_samples, &in);
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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 filter_frame(inlink, in);
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FF_FILTER_FORWARD_STATUS(inlink, outlink);
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FF_FILTER_FORWARD_WANTED(outlink, inlink);
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return FFERROR_NOT_READY;
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}
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static const AVFilterPad inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_AUDIO,
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.config_props = config_input,
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},
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{ NULL }
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};
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static const AVFilterPad outputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.config_props = config_output,
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},
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{ NULL }
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};
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AVFilter ff_avf_abitscope = {
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.name = "abitscope",
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.description = NULL_IF_CONFIG_SMALL("Convert input audio to audio bit scope video output."),
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.query_formats = query_formats,
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.priv_size = sizeof(AudioBitScopeContext),
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.inputs = inputs,
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.outputs = outputs,
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.activate = activate,
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.priv_class = &abitscope_class,
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};
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