| /* |
| * Copyright (c) 2013 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 |
| */ |
| |
| /** |
| * @file |
| * audio to video multimedia vectorscope filter |
| */ |
| |
| #include "libavutil/avassert.h" |
| #include "libavutil/channel_layout.h" |
| #include "libavutil/opt.h" |
| #include "libavutil/parseutils.h" |
| #include "avfilter.h" |
| #include "formats.h" |
| #include "audio.h" |
| #include "video.h" |
| #include "internal.h" |
| |
| enum VectorScopeMode { |
| LISSAJOUS, |
| LISSAJOUS_XY, |
| POLAR, |
| MODE_NB, |
| }; |
| |
| enum VectorScopeDraw { |
| DOT, |
| LINE, |
| DRAW_NB, |
| }; |
| |
| enum VectorScopeScale { |
| LIN, |
| SQRT, |
| CBRT, |
| LOG, |
| SCALE_NB, |
| }; |
| |
| typedef struct AudioVectorScopeContext { |
| const AVClass *class; |
| AVFrame *outpicref; |
| int w, h; |
| int hw, hh; |
| int mode; |
| int draw; |
| int scale; |
| int contrast[4]; |
| int fade[4]; |
| double zoom; |
| unsigned prev_x, prev_y; |
| AVRational frame_rate; |
| } AudioVectorScopeContext; |
| |
| #define OFFSET(x) offsetof(AudioVectorScopeContext, x) |
| #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM |
| |
| static const AVOption avectorscope_options[] = { |
| { "mode", "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=LISSAJOUS}, 0, MODE_NB-1, FLAGS, "mode" }, |
| { "m", "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=LISSAJOUS}, 0, MODE_NB-1, FLAGS, "mode" }, |
| { "lissajous", "", 0, AV_OPT_TYPE_CONST, {.i64=LISSAJOUS}, 0, 0, FLAGS, "mode" }, |
| { "lissajous_xy", "", 0, AV_OPT_TYPE_CONST, {.i64=LISSAJOUS_XY}, 0, 0, FLAGS, "mode" }, |
| { "polar", "", 0, AV_OPT_TYPE_CONST, {.i64=POLAR}, 0, 0, FLAGS, "mode" }, |
| { "rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS }, |
| { "r", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS }, |
| { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="400x400"}, 0, 0, FLAGS }, |
| { "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="400x400"}, 0, 0, FLAGS }, |
| { "rc", "set red contrast", OFFSET(contrast[0]), AV_OPT_TYPE_INT, {.i64=40}, 0, 255, FLAGS }, |
| { "gc", "set green contrast", OFFSET(contrast[1]), AV_OPT_TYPE_INT, {.i64=160}, 0, 255, FLAGS }, |
| { "bc", "set blue contrast", OFFSET(contrast[2]), AV_OPT_TYPE_INT, {.i64=80}, 0, 255, FLAGS }, |
| { "ac", "set alpha contrast", OFFSET(contrast[3]), AV_OPT_TYPE_INT, {.i64=255}, 0, 255, FLAGS }, |
| { "rf", "set red fade", OFFSET(fade[0]), AV_OPT_TYPE_INT, {.i64=15}, 0, 255, FLAGS }, |
| { "gf", "set green fade", OFFSET(fade[1]), AV_OPT_TYPE_INT, {.i64=10}, 0, 255, FLAGS }, |
| { "bf", "set blue fade", OFFSET(fade[2]), AV_OPT_TYPE_INT, {.i64=5}, 0, 255, FLAGS }, |
| { "af", "set alpha fade", OFFSET(fade[3]), AV_OPT_TYPE_INT, {.i64=5}, 0, 255, FLAGS }, |
| { "zoom", "set zoom factor", OFFSET(zoom), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 10, FLAGS }, |
| { "draw", "set draw mode", OFFSET(draw), AV_OPT_TYPE_INT, {.i64=DOT}, 0, DRAW_NB-1, FLAGS, "draw" }, |
| { "dot", "", 0, AV_OPT_TYPE_CONST, {.i64=DOT} , 0, 0, FLAGS, "draw" }, |
| { "line", "", 0, AV_OPT_TYPE_CONST, {.i64=LINE}, 0, 0, FLAGS, "draw" }, |
| { "scale", "set amplitude scale mode", OFFSET(scale), AV_OPT_TYPE_INT, {.i64=LIN}, 0, SCALE_NB-1, FLAGS, "scale" }, |
| { "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=LIN}, 0, 0, FLAGS, "scale" }, |
| { "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=SQRT}, 0, 0, FLAGS, "scale" }, |
| { "cbrt", "cube root", 0, AV_OPT_TYPE_CONST, {.i64=CBRT}, 0, 0, FLAGS, "scale" }, |
| { "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=LOG}, 0, 0, FLAGS, "scale" }, |
| { NULL } |
| }; |
| |
| AVFILTER_DEFINE_CLASS(avectorscope); |
| |
| static void draw_dot(AudioVectorScopeContext *s, unsigned x, unsigned y) |
| { |
| const int linesize = s->outpicref->linesize[0]; |
| uint8_t *dst; |
| |
| if (s->zoom > 1) { |
| if (y >= s->h || x >= s->w) |
| return; |
| } else { |
| y = FFMIN(y, s->h - 1); |
| x = FFMIN(x, s->w - 1); |
| } |
| |
| dst = &s->outpicref->data[0][y * linesize + x * 4]; |
| dst[0] = FFMIN(dst[0] + s->contrast[0], 255); |
| dst[1] = FFMIN(dst[1] + s->contrast[1], 255); |
| dst[2] = FFMIN(dst[2] + s->contrast[2], 255); |
| dst[3] = FFMIN(dst[3] + s->contrast[3], 255); |
| } |
| |
| static void draw_line(AudioVectorScopeContext *s, int x0, int y0, int x1, int y1) |
| { |
| int dx = FFABS(x1-x0), sx = x0 < x1 ? 1 : -1; |
| int dy = FFABS(y1-y0), sy = y0 < y1 ? 1 : -1; |
| int err = (dx>dy ? dx : -dy) / 2, e2; |
| |
| for (;;) { |
| draw_dot(s, x0, y0); |
| |
| if (x0 == x1 && y0 == y1) |
| break; |
| |
| e2 = err; |
| |
| if (e2 >-dx) { |
| err -= dy; |
| x0 += sx; |
| } |
| |
| if (e2 < dy) { |
| err += dx; |
| y0 += sy; |
| } |
| } |
| } |
| |
| static void fade(AudioVectorScopeContext *s) |
| { |
| const int linesize = s->outpicref->linesize[0]; |
| int i, j; |
| |
| if (s->fade[0] || s->fade[1] || s->fade[2]) { |
| uint8_t *d = s->outpicref->data[0]; |
| for (i = 0; i < s->h; i++) { |
| for (j = 0; j < s->w*4; j+=4) { |
| d[j+0] = FFMAX(d[j+0] - s->fade[0], 0); |
| d[j+1] = FFMAX(d[j+1] - s->fade[1], 0); |
| d[j+2] = FFMAX(d[j+2] - s->fade[2], 0); |
| d[j+3] = FFMAX(d[j+3] - s->fade[3], 0); |
| } |
| d += linesize; |
| } |
| } |
| } |
| |
| static int query_formats(AVFilterContext *ctx) |
| { |
| AVFilterFormats *formats = NULL; |
| AVFilterChannelLayouts *layout = NULL; |
| AVFilterLink *inlink = ctx->inputs[0]; |
| AVFilterLink *outlink = ctx->outputs[0]; |
| static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_FLT, 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 || |
| (ret = ff_add_channel_layout (&layout, AV_CH_LAYOUT_STEREO )) < 0 || |
| (ret = ff_channel_layouts_ref (layout , &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; |
| AudioVectorScopeContext *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; |
| |
| return 0; |
| } |
| |
| static int config_output(AVFilterLink *outlink) |
| { |
| AudioVectorScopeContext *s = outlink->src->priv; |
| |
| outlink->w = s->w; |
| outlink->h = s->h; |
| outlink->sample_aspect_ratio = (AVRational){1,1}; |
| outlink->frame_rate = s->frame_rate; |
| |
| s->prev_x = s->hw = s->w / 2; |
| s->prev_y = s->hh = s->mode == POLAR ? s->h - 1 : s->h / 2; |
| |
| return 0; |
| } |
| |
| static int filter_frame(AVFilterLink *inlink, AVFrame *insamples) |
| { |
| AVFilterContext *ctx = inlink->dst; |
| AVFilterLink *outlink = ctx->outputs[0]; |
| AudioVectorScopeContext *s = ctx->priv; |
| const int hw = s->hw; |
| const int hh = s->hh; |
| unsigned x, y; |
| unsigned prev_x = s->prev_x, prev_y = s->prev_y; |
| double zoom = s->zoom; |
| int i; |
| |
| if (!s->outpicref || s->outpicref->width != outlink->w || |
| s->outpicref->height != outlink->h) { |
| av_frame_free(&s->outpicref); |
| s->outpicref = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
| if (!s->outpicref) { |
| av_frame_free(&insamples); |
| return AVERROR(ENOMEM); |
| } |
| |
| s->outpicref->sample_aspect_ratio = (AVRational){1,1}; |
| for (i = 0; i < outlink->h; i++) |
| memset(s->outpicref->data[0] + i * s->outpicref->linesize[0], 0, outlink->w * 4); |
| } |
| s->outpicref->pts = insamples->pts; |
| |
| fade(s); |
| |
| if (zoom < 1) { |
| float max = 0; |
| |
| switch (insamples->format) { |
| case AV_SAMPLE_FMT_S16: { |
| int16_t *samples = (int16_t *)insamples->data[0]; |
| |
| for (i = 0; i < insamples->nb_samples * 2; i++) { |
| float sample = samples[i] / (float)INT16_MAX; |
| max = FFMAX(FFABS(sample), max); |
| } |
| |
| } |
| break; |
| case AV_SAMPLE_FMT_FLT: { |
| float *samples = (float *)insamples->data[0]; |
| |
| for (i = 0; i < insamples->nb_samples * 2; i++) { |
| max = FFMAX(FFABS(samples[i]), max); |
| } |
| } |
| break; |
| default: |
| av_assert2(0); |
| } |
| |
| zoom = 1. / max; |
| } |
| |
| for (i = 0; i < insamples->nb_samples; i++) { |
| int16_t *samples = (int16_t *)insamples->data[0] + i * 2; |
| float *samplesf = (float *)insamples->data[0] + i * 2; |
| float src[2]; |
| |
| switch (insamples->format) { |
| case AV_SAMPLE_FMT_S16: |
| src[0] = samples[0] / (float)INT16_MAX; |
| src[1] = samples[1] / (float)INT16_MAX; |
| break; |
| case AV_SAMPLE_FMT_FLT: |
| src[0] = samplesf[0]; |
| src[1] = samplesf[1]; |
| break; |
| default: |
| av_assert2(0); |
| } |
| |
| switch (s->scale) { |
| case SQRT: |
| src[0] = FFSIGN(src[0]) * sqrtf(FFABS(src[0])); |
| src[1] = FFSIGN(src[1]) * sqrtf(FFABS(src[1])); |
| break; |
| case CBRT: |
| src[0] = FFSIGN(src[0]) * cbrtf(FFABS(src[0])); |
| src[1] = FFSIGN(src[1]) * cbrtf(FFABS(src[1])); |
| break; |
| case LOG: |
| src[0] = FFSIGN(src[0]) * logf(1 + FFABS(src[0])) / logf(2); |
| src[1] = FFSIGN(src[1]) * logf(1 + FFABS(src[1])) / logf(2); |
| break; |
| } |
| |
| if (s->mode == LISSAJOUS) { |
| x = ((src[1] - src[0]) * zoom / 2 + 1) * hw; |
| y = (1.0 - (src[0] + src[1]) * zoom / 2) * hh; |
| } else if (s->mode == LISSAJOUS_XY) { |
| x = (src[1] * zoom + 1) * hw; |
| y = (src[0] * zoom + 1) * hh; |
| } else { |
| float sx, sy, cx, cy; |
| |
| sx = src[1] * zoom; |
| sy = src[0] * zoom; |
| cx = sx * sqrtf(1 - 0.5 * sy * sy); |
| cy = sy * sqrtf(1 - 0.5 * sx * sx); |
| x = hw + hw * FFSIGN(cx + cy) * (cx - cy) * .7; |
| y = s->h - s->h * fabsf(cx + cy) * .7; |
| } |
| |
| if (s->draw == DOT) { |
| draw_dot(s, x, y); |
| } else { |
| draw_line(s, x, y, prev_x, prev_y); |
| } |
| prev_x = x; |
| prev_y = y; |
| } |
| |
| s->prev_x = x, s->prev_y = y; |
| av_frame_free(&insamples); |
| |
| return ff_filter_frame(outlink, av_frame_clone(s->outpicref)); |
| } |
| |
| static av_cold void uninit(AVFilterContext *ctx) |
| { |
| AudioVectorScopeContext *s = ctx->priv; |
| |
| av_frame_free(&s->outpicref); |
| } |
| |
| static const AVFilterPad audiovectorscope_inputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_AUDIO, |
| .config_props = config_input, |
| .filter_frame = filter_frame, |
| }, |
| { NULL } |
| }; |
| |
| static const AVFilterPad audiovectorscope_outputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .config_props = config_output, |
| }, |
| { NULL } |
| }; |
| |
| AVFilter ff_avf_avectorscope = { |
| .name = "avectorscope", |
| .description = NULL_IF_CONFIG_SMALL("Convert input audio to vectorscope video output."), |
| .uninit = uninit, |
| .query_formats = query_formats, |
| .priv_size = sizeof(AudioVectorScopeContext), |
| .inputs = audiovectorscope_inputs, |
| .outputs = audiovectorscope_outputs, |
| .priv_class = &avectorscope_class, |
| }; |
