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- /*
- * 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
- */
- /**
- * @file
- * audio to video multimedia aphasemeter filter
- */
- #include "libavutil/avassert.h"
- #include "libavutil/channel_layout.h"
- #include "libavutil/intreadwrite.h"
- #include "libavutil/opt.h"
- #include "libavutil/parseutils.h"
- #include "avfilter.h"
- #include "formats.h"
- #include "audio.h"
- #include "video.h"
- #include "internal.h"
- typedef struct AudioPhaseMeterContext {
- const AVClass *class;
- AVFrame *out;
- int w, h;
- AVRational frame_rate;
- int contrast[4];
- uint8_t *mpc_str;
- uint8_t mpc[4];
- int draw_median_phase;
- } AudioPhaseMeterContext;
- #define OFFSET(x) offsetof(AudioPhaseMeterContext, x)
- #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
- static const AVOption aphasemeter_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 },
- { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="800x400"}, 0, 0, FLAGS },
- { "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="800x400"}, 0, 0, FLAGS },
- { "rc", "set red contrast", OFFSET(contrast[0]), AV_OPT_TYPE_INT, {.i64=2}, 0, 255, FLAGS },
- { "gc", "set green contrast", OFFSET(contrast[1]), AV_OPT_TYPE_INT, {.i64=7}, 0, 255, FLAGS },
- { "bc", "set blue contrast", OFFSET(contrast[2]), AV_OPT_TYPE_INT, {.i64=1}, 0, 255, FLAGS },
- { "mpc", "set median phase color", OFFSET(mpc_str), AV_OPT_TYPE_STRING, {.str = "none"}, 0, 0, FLAGS },
- { NULL }
- };
- AVFILTER_DEFINE_CLASS(aphasemeter);
- 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_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;
- AudioPhaseMeterContext *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)
- {
- AVFilterContext *ctx = outlink->src;
- AudioPhaseMeterContext *s = ctx->priv;
- outlink->w = s->w;
- outlink->h = s->h;
- outlink->sample_aspect_ratio = (AVRational){1,1};
- outlink->frame_rate = s->frame_rate;
- if (!strcmp(s->mpc_str, "none"))
- s->draw_median_phase = 0;
- else if (av_parse_color(s->mpc, s->mpc_str, -1, ctx) >= 0)
- s->draw_median_phase = 1;
- else
- return AVERROR(EINVAL);
- return 0;
- }
- static inline int get_x(float phase, int w)
- {
- return (phase + 1.) / 2. * (w - 1);
- }
- static int filter_frame(AVFilterLink *inlink, AVFrame *in)
- {
- AVFilterContext *ctx = inlink->dst;
- AVFilterLink *outlink = ctx->outputs[0];
- AudioPhaseMeterContext *s = ctx->priv;
- AVDictionary **metadata;
- const int rc = s->contrast[0];
- const int gc = s->contrast[1];
- const int bc = s->contrast[2];
- float fphase = 0;
- AVFrame *out;
- uint8_t *dst;
- int i;
- 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(&in);
- return AVERROR(ENOMEM);
- }
- out = s->out;
- for (i = 0; i < outlink->h; i++)
- memset(out->data[0] + i * out->linesize[0], 0, outlink->w * 4);
- } else {
- out = s->out;
- for (i = outlink->h - 1; i >= 10; i--)
- memmove(out->data[0] + (i ) * out->linesize[0],
- out->data[0] + (i-1) * out->linesize[0],
- outlink->w * 4);
- for (i = 0; i < outlink->w; i++)
- AV_WL32(out->data[0] + i * 4, 0);
- }
- s->out->pts = in->pts;
- for (i = 0; i < in->nb_samples; i++) {
- const float *src = (float *)in->data[0] + i * 2;
- const float f = src[0] * src[1] / (src[0]*src[0] + src[1] * src[1]) * 2;
- const float phase = isnan(f) ? 1 : f;
- const int x = get_x(phase, s->w);
- dst = out->data[0] + x * 4;
- dst[0] = FFMIN(255, dst[0] + rc);
- dst[1] = FFMIN(255, dst[1] + gc);
- dst[2] = FFMIN(255, dst[2] + bc);
- dst[3] = 255;
- fphase += phase;
- }
- fphase /= in->nb_samples;
- if (s->draw_median_phase) {
- dst = out->data[0] + get_x(fphase, s->w) * 4;
- AV_WL32(dst, AV_RL32(s->mpc));
- }
- for (i = 1; i < 10 && i < outlink->h; i++)
- memcpy(out->data[0] + i * out->linesize[0], out->data[0], outlink->w * 4);
- metadata = avpriv_frame_get_metadatap(out);
- if (metadata) {
- uint8_t value[128];
- snprintf(value, sizeof(value), "%f", fphase);
- av_dict_set(metadata, "lavfi.aphasemeter.phase", value, 0);
- }
- av_frame_free(&in);
- return ff_filter_frame(outlink, av_frame_clone(s->out));
- }
- static av_cold void uninit(AVFilterContext *ctx)
- {
- AudioPhaseMeterContext *s = ctx->priv;
- av_frame_free(&s->out);
- }
- static const AVFilterPad inputs[] = {
- {
- .name = "default",
- .type = AVMEDIA_TYPE_AUDIO,
- .config_props = config_input,
- .filter_frame = filter_frame,
- },
- { NULL }
- };
- static const AVFilterPad outputs[] = {
- {
- .name = "default",
- .type = AVMEDIA_TYPE_VIDEO,
- .config_props = config_output,
- },
- { NULL }
- };
- AVFilter ff_avf_aphasemeter = {
- .name = "aphasemeter",
- .description = NULL_IF_CONFIG_SMALL("Convert input audio to phase meter video output."),
- .uninit = uninit,
- .query_formats = query_formats,
- .priv_size = sizeof(AudioPhaseMeterContext),
- .inputs = inputs,
- .outputs = outputs,
- .priv_class = &aphasemeter_class,
- };
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