libavfilter/avf_abitscope.c

   1 /*
   2  * Copyright (c) 2016 Paul B Mahol
   3  *
   4  * This file is part of FFmpeg.
   5  *
   6  * FFmpeg is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * FFmpeg is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with FFmpeg; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #include "libavutil/avstring.h"
  22 #include "libavutil/intreadwrite.h"
  23 #include "libavutil/mem.h"
  24 #include "libavutil/opt.h"
  25 #include "libavutil/parseutils.h"
  26 #include "avfilter.h"
  27 #include "filters.h"
  28 #include "formats.h"
  29 #include "audio.h"
  30 #include "video.h"
  31
  32 typedef struct AudioBitScopeContext {
  33     const AVClass *class;
  34     int w, h;
  35     AVRational frame_rate;
  36     char *colors;
  37     int mode;
  38
  39     int nb_channels;
  40     int nb_samples;
  41     int depth;
  42     int current_vpos;
  43     uint8_t *fg;
  44
  45     uint64_t counter[64];
  46
  47     AVFrame *outpicref;
  48 } AudioBitScopeContext;
  49
  50 #define OFFSET(x) offsetof(AudioBitScopeContext, x)
  51 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
  52
  53 static const AVOption abitscope_options[] = {
  54     { "rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
  55     { "r",    "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
  56     { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="1024x256"}, 0, 0, FLAGS },
  57     { "s",    "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="1024x256"}, 0, 0, FLAGS },
  58     { "colors", "set channels colors", OFFSET(colors), AV_OPT_TYPE_STRING, {.str = "red|green|blue|yellow|orange|lime|pink|magenta|brown" }, 0, 0, FLAGS },
  59     { "mode", "set output mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 1, FLAGS, .unit = "mode" },
  60     { "m",    "set output mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 1, FLAGS, .unit = "mode" },
  61     { "bars",  NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, FLAGS, .unit = "mode" },
  62     { "trace", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, FLAGS, .unit = "mode" },
  63     { NULL }
  64 };
  65
  66 AVFILTER_DEFINE_CLASS(abitscope);
  67
  68 static int query_formats(const AVFilterContext *ctx,
  69                          AVFilterFormatsConfig **cfg_in,
  70                          AVFilterFormatsConfig **cfg_out)
  71 {
  72     AVFilterFormats *formats = NULL;
  73     static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_S16P, AV_SAMPLE_FMT_S32P,
  74                                                        AV_SAMPLE_FMT_U8P,  AV_SAMPLE_FMT_S64P,
  75                                                        AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_DBLP,
  76                                                        AV_SAMPLE_FMT_NONE };
  77     static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_RGBA, AV_PIX_FMT_NONE };
  78     int ret;
  79
  80     formats = ff_make_format_list(sample_fmts);
  81     if ((ret = ff_formats_ref(formats, &cfg_in[0]->formats)) < 0)
  82         return ret;
  83
  84     formats = ff_make_format_list(pix_fmts);
  85     if ((ret = ff_formats_ref(formats, &cfg_out[0]->formats)) < 0)
  86         return ret;
  87
  88     return 0;
  89 }
  90
  91 static int config_input(AVFilterLink *inlink)
  92 {
  93     AVFilterContext *ctx = inlink->dst;
  94     AudioBitScopeContext *s = ctx->priv;
  95     int ch;
  96     char *colors, *saveptr = NULL;
  97
  98     s->nb_samples = FFMAX(1, av_rescale(inlink->sample_rate, s->frame_rate.den, s->frame_rate.num));
  99     s->nb_channels = inlink->ch_layout.nb_channels;
 100     s->depth = inlink->format == AV_SAMPLE_FMT_S16P ? 16 : 32;
 101
 102     s->fg = av_malloc_array(s->nb_channels, 4 * sizeof(*s->fg));
 103     if (!s->fg)
 104         return AVERROR(ENOMEM);
 105
 106     colors = av_strdup(s->colors);
 107     if (!colors)
 108         return AVERROR(ENOMEM);
 109
 110     for (ch = 0; ch < s->nb_channels; ch++) {
 111         uint8_t fg[4] = { 0xff, 0xff, 0xff, 0xff };
 112         char *color;
 113
 114         color = av_strtok(ch == 0 ? colors : NULL, " |", &saveptr);
 115         if (color)
 116             av_parse_color(fg, color, -1, ctx);
 117         s->fg[4 * ch + 0] = fg[0];
 118         s->fg[4 * ch + 1] = fg[1];
 119         s->fg[4 * ch + 2] = fg[2];
 120         s->fg[4 * ch + 3] = fg[3];
 121     }
 122     av_free(colors);
 123
 124     return 0;
 125 }
 126
 127 static int config_output(AVFilterLink *outlink)
 128 {
 129     AudioBitScopeContext *s = outlink->src->priv;
 130     FilterLink *l = ff_filter_link(outlink);
 131
 132     outlink->w = s->w;
 133     outlink->h = s->h;
 134     outlink->sample_aspect_ratio = (AVRational){1,1};
 135     l->frame_rate = s->frame_rate;
 136     outlink->time_base = av_inv_q(l->frame_rate);
 137
 138     return 0;
 139 }
 140
 141 #define BITCOUNTER(type, depth, one)                                        \
 142         memset(counter, 0, sizeof(s->counter));                             \
 143         for (int i = 0; i < nb_samples; i++) {                              \
 144             const type x = in[i];                                           \
 145             for (int j = 0; j < depth && x; j++)                            \
 146                 counter[j] += !!(x & (one << j));                           \
 147         }
 148
 149 #define BARS(type, depth, one)                                              \
 150     for (int ch = 0; ch < inlink->ch_layout.nb_channels; ch++) {            \
 151         const int nb_samples = insamples->nb_samples;                       \
 152         const type *in = (const type *)insamples->extended_data[ch];        \
 153         const int w = outpicref->width / inlink->ch_layout.nb_channels;     \
 154         const int h = outpicref->height / depth;                            \
 155         const uint32_t color = AV_RN32(&s->fg[4 * ch]);                     \
 156         uint64_t *counter = s->counter;                                     \
 157                                                                             \
 158         BITCOUNTER(type, depth, one)                                        \
 159                                                                             \
 160         for (int b = 0; b < depth; b++) {                                   \
 161             for (int j = 1; j < h - 1; j++) {                               \
 162                 uint8_t *dst = outpicref->data[0] + (b * h + j) * outpicref->linesize[0] + w * ch * 4; \
 163                 const int ww = (counter[depth - b - 1] / (float)nb_samples) * (w - 1); \
 164                                                                             \
 165                 for (int i = 0; i < ww; i++) {                              \
 166                     AV_WN32(&dst[i * 4], color);                            \
 167                 }                                                           \
 168             }                                                               \
 169         }                                                                   \
 170     }
 171
 172 #define DO_TRACE(type, depth, one)                                          \
 173     for (int ch = 0; ch < inlink->ch_layout.nb_channels; ch++) {            \
 174         const int nb_samples = insamples->nb_samples;                       \
 175         const int w = outpicref->width / inlink->ch_layout.nb_channels;     \
 176         const type *in = (const type *)insamples->extended_data[ch];        \
 177         uint64_t *counter = s->counter;                                     \
 178         const int wb = w / depth;                                           \
 179         int wv;                                                             \
 180                                                                             \
 181         BITCOUNTER(type, depth, one)                                        \
 182                                                                             \
 183         for (int b = 0; b < depth; b++) {                                   \
 184             uint8_t colors[4];                                              \
 185             uint32_t color;                                                 \
 186             uint8_t *dst = outpicref->data[0] + w * ch * 4 + wb * b * 4 +   \
 187                            s->current_vpos * outpicref->linesize[0];        \
 188             wv = (counter[depth - b - 1] * 255) / nb_samples;               \
 189             colors[0] = (wv * s->fg[ch * 4 + 0] + 127) / 255;               \
 190             colors[1] = (wv * s->fg[ch * 4 + 1] + 127) / 255;               \
 191             colors[2] = (wv * s->fg[ch * 4 + 2] + 127) / 255;               \
 192             colors[3] = (wv * s->fg[ch * 4 + 3] + 127) / 255;               \
 193             color = AV_RN32(colors);                                        \
 194                                                                             \
 195             for (int x = 0; x < wb; x++)                                    \
 196                 AV_WN32(&dst[x * 4], color);                                \
 197         }                                                                   \
 198     }
 199
 200 static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
 201 {
 202     AVFilterContext *ctx = inlink->dst;
 203     AVFilterLink *outlink = ctx->outputs[0];
 204     AudioBitScopeContext *s = ctx->priv;
 205     AVFrame *outpicref;
 206     int ret;
 207
 208     if (s->mode == 0 || !s->outpicref) {
 209         outpicref = ff_get_video_buffer(outlink, outlink->w, outlink->h);
 210         if (!outpicref) {
 211             av_frame_free(&insamples);
 212             return AVERROR(ENOMEM);
 213         }
 214
 215         for (int i = 0; i < outlink->h; i++)
 216             memset(outpicref->data[0] + i * outpicref->linesize[0], 0, outlink->w * 4);
 217         if (!s->outpicref && s->mode == 1)
 218             s->outpicref = outpicref;
 219     }
 220
 221     if (s->mode == 1) {
 222         ret = ff_inlink_make_frame_writable(outlink, &s->outpicref);
 223         if (ret < 0) {
 224             av_frame_free(&insamples);
 225             return ret;
 226         }
 227         outpicref = av_frame_clone(s->outpicref);
 228         if (!outpicref) {
 229             av_frame_free(&insamples);
 230             return AVERROR(ENOMEM);
 231         }
 232     }
 233
 234     outpicref->pts = av_rescale_q(insamples->pts, inlink->time_base, outlink->time_base);
 235     outpicref->duration = 1;
 236     outpicref->sample_aspect_ratio = (AVRational){1,1};
 237
 238     switch (insamples->format) {
 239     case AV_SAMPLE_FMT_U8P:
 240         if (s->mode == 0) { BARS(uint8_t,   8, 1) } else { DO_TRACE(uint8_t,   8, 1) }
 241         break;
 242     case AV_SAMPLE_FMT_S16P:
 243         if (s->mode == 0) { BARS(uint16_t, 16, 1) } else { DO_TRACE(uint16_t, 16, 1) }
 244         break;
 245     case AV_SAMPLE_FMT_FLTP:
 246     case AV_SAMPLE_FMT_S32P:
 247         if (s->mode == 0) { BARS(uint32_t, 32, 1U) } else { DO_TRACE(uint32_t, 32, 1U) }
 248         break;
 249     case AV_SAMPLE_FMT_DBLP:
 250     case AV_SAMPLE_FMT_S64P:
 251         if (s->mode == 0) { BARS(uint64_t, 64, 1ULL) } else { DO_TRACE(uint64_t, 64, 1ULL) }
 252         break;
 253     }
 254
 255     s->current_vpos++;
 256     if (s->current_vpos >= outlink->h)
 257         s->current_vpos = 0;
 258     av_frame_free(&insamples);
 259
 260     return ff_filter_frame(outlink, outpicref);
 261 }
 262
 263 static int activate(AVFilterContext *ctx)
 264 {
 265     AVFilterLink *inlink = ctx->inputs[0];
 266     AVFilterLink *outlink = ctx->outputs[0];
 267     AudioBitScopeContext *s = ctx->priv;
 268     AVFrame *in;
 269     int ret;
 270
 271     FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
 272
 273     ret = ff_inlink_consume_samples(inlink, s->nb_samples, s->nb_samples, &in);
 274     if (ret < 0)
 275         return ret;
 276     if (ret > 0)
 277         return filter_frame(inlink, in);
 278
 279     FF_FILTER_FORWARD_STATUS(inlink, outlink);
 280     FF_FILTER_FORWARD_WANTED(outlink, inlink);
 281
 282     return FFERROR_NOT_READY;
 283 }
 284
 285 static av_cold void uninit(AVFilterContext *ctx)
 286 {
 287     AudioBitScopeContext *s = ctx->priv;
 288
 289     av_frame_free(&s->outpicref);
 290 }
 291
 292 static const AVFilterPad inputs[] = {
 293     {
 294         .name         = "default",
 295         .type         = AVMEDIA_TYPE_AUDIO,
 296         .config_props = config_input,
 297     },
 298 };
 299
 300 static const AVFilterPad outputs[] = {
 301     {
 302         .name         = "default",
 303         .type         = AVMEDIA_TYPE_VIDEO,
 304         .config_props = config_output,
 305     },
 306 };
 307
 308 const FFFilter ff_avf_abitscope = {
 309     .p.name        = "abitscope",
 310     .p.description = NULL_IF_CONFIG_SMALL("Convert input audio to audio bit scope video output."),
 311     .p.priv_class  = &abitscope_class,
 312     .priv_size     = sizeof(AudioBitScopeContext),
 313     FILTER_INPUTS(inputs),
 314     FILTER_OUTPUTS(outputs),
 315     FILTER_QUERY_FUNC2(query_formats),
 316     .uninit        = uninit,
 317     .activate      = activate,
 318 };