summaryrefslogtreecommitdiff
path: root/libavfilter/avf_aphasemeter.c (plain)
blob: bfd77861ec8c7eea5a8a42248e2f4dc2d314ef3a
1/*
2 * Copyright (c) 2015 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/**
22 * @file
23 * audio to video multimedia aphasemeter filter
24 */
25
26#include "libavutil/avassert.h"
27#include "libavutil/channel_layout.h"
28#include "libavutil/intreadwrite.h"
29#include "libavutil/opt.h"
30#include "libavutil/parseutils.h"
31#include "avfilter.h"
32#include "formats.h"
33#include "audio.h"
34#include "video.h"
35#include "internal.h"
36
37typedef struct AudioPhaseMeterContext {
38 const AVClass *class;
39 AVFrame *out;
40 int do_video;
41 int w, h;
42 AVRational frame_rate;
43 int contrast[4];
44 uint8_t *mpc_str;
45 uint8_t mpc[4];
46 int draw_median_phase;
47} AudioPhaseMeterContext;
48
49#define OFFSET(x) offsetof(AudioPhaseMeterContext, x)
50#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
51
52static const AVOption aphasemeter_options[] = {
53 { "rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
54 { "r", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
55 { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="800x400"}, 0, 0, FLAGS },
56 { "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="800x400"}, 0, 0, FLAGS },
57 { "rc", "set red contrast", OFFSET(contrast[0]), AV_OPT_TYPE_INT, {.i64=2}, 0, 255, FLAGS },
58 { "gc", "set green contrast", OFFSET(contrast[1]), AV_OPT_TYPE_INT, {.i64=7}, 0, 255, FLAGS },
59 { "bc", "set blue contrast", OFFSET(contrast[2]), AV_OPT_TYPE_INT, {.i64=1}, 0, 255, FLAGS },
60 { "mpc", "set median phase color", OFFSET(mpc_str), AV_OPT_TYPE_STRING, {.str = "none"}, 0, 0, FLAGS },
61 { "video", "set video output", OFFSET(do_video), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS },
62 { NULL }
63};
64
65AVFILTER_DEFINE_CLASS(aphasemeter);
66
67static int query_formats(AVFilterContext *ctx)
68{
69 AudioPhaseMeterContext *s = ctx->priv;
70 AVFilterFormats *formats = NULL;
71 AVFilterChannelLayouts *layout = NULL;
72 AVFilterLink *inlink = ctx->inputs[0];
73 AVFilterLink *outlink = ctx->outputs[0];
74 static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_NONE };
75 static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_RGBA, AV_PIX_FMT_NONE };
76 int ret;
77
78 formats = ff_make_format_list(sample_fmts);
79 if ((ret = ff_formats_ref (formats, &inlink->out_formats )) < 0 ||
80 (ret = ff_formats_ref (formats, &outlink->in_formats )) < 0 ||
81 (ret = ff_add_channel_layout (&layout, AV_CH_LAYOUT_STEREO )) < 0 ||
82 (ret = ff_channel_layouts_ref (layout , &inlink->out_channel_layouts)) < 0 ||
83 (ret = ff_channel_layouts_ref (layout , &outlink->in_channel_layouts)) < 0)
84 return ret;
85
86 formats = ff_all_samplerates();
87 if ((ret = ff_formats_ref(formats, &inlink->out_samplerates)) < 0 ||
88 (ret = ff_formats_ref(formats, &outlink->in_samplerates)) < 0)
89 return ret;
90
91 if (s->do_video) {
92 AVFilterLink *outlink = ctx->outputs[1];
93
94 formats = ff_make_format_list(pix_fmts);
95 if ((ret = ff_formats_ref(formats, &outlink->in_formats)) < 0)
96 return ret;
97 }
98
99 return 0;
100}
101
102static int config_input(AVFilterLink *inlink)
103{
104 AVFilterContext *ctx = inlink->dst;
105 AudioPhaseMeterContext *s = ctx->priv;
106 int nb_samples;
107
108 if (s->do_video) {
109 nb_samples = FFMAX(1024, ((double)inlink->sample_rate / av_q2d(s->frame_rate)) + 0.5);
110 inlink->partial_buf_size =
111 inlink->min_samples =
112 inlink->max_samples = nb_samples;
113 }
114
115 return 0;
116}
117
118static int config_video_output(AVFilterLink *outlink)
119{
120 AVFilterContext *ctx = outlink->src;
121 AudioPhaseMeterContext *s = ctx->priv;
122
123 outlink->w = s->w;
124 outlink->h = s->h;
125 outlink->sample_aspect_ratio = (AVRational){1,1};
126 outlink->frame_rate = s->frame_rate;
127
128 if (!strcmp(s->mpc_str, "none"))
129 s->draw_median_phase = 0;
130 else if (av_parse_color(s->mpc, s->mpc_str, -1, ctx) >= 0)
131 s->draw_median_phase = 1;
132 else
133 return AVERROR(EINVAL);
134
135 return 0;
136}
137
138static inline int get_x(float phase, int w)
139{
140 return (phase + 1.) / 2. * (w - 1);
141}
142
143static int filter_frame(AVFilterLink *inlink, AVFrame *in)
144{
145 AVFilterContext *ctx = inlink->dst;
146 AudioPhaseMeterContext *s = ctx->priv;
147 AVFilterLink *outlink = s->do_video ? ctx->outputs[1] : NULL;
148 AVFilterLink *aoutlink = ctx->outputs[0];
149 AVDictionary **metadata;
150 const int rc = s->contrast[0];
151 const int gc = s->contrast[1];
152 const int bc = s->contrast[2];
153 float fphase = 0;
154 AVFrame *out;
155 uint8_t *dst;
156 int i;
157
158 if (s->do_video && (!s->out || s->out->width != outlink->w ||
159 s->out->height != outlink->h)) {
160 av_frame_free(&s->out);
161 s->out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
162 if (!s->out) {
163 av_frame_free(&in);
164 return AVERROR(ENOMEM);
165 }
166
167 out = s->out;
168 for (i = 0; i < outlink->h; i++)
169 memset(out->data[0] + i * out->linesize[0], 0, outlink->w * 4);
170 } else if (s->do_video) {
171 out = s->out;
172 for (i = outlink->h - 1; i >= 10; i--)
173 memmove(out->data[0] + (i ) * out->linesize[0],
174 out->data[0] + (i-1) * out->linesize[0],
175 outlink->w * 4);
176 for (i = 0; i < outlink->w; i++)
177 AV_WL32(out->data[0] + i * 4, 0);
178 }
179
180 for (i = 0; i < in->nb_samples; i++) {
181 const float *src = (float *)in->data[0] + i * 2;
182 const float f = src[0] * src[1] / (src[0]*src[0] + src[1] * src[1]) * 2;
183 const float phase = isnan(f) ? 1 : f;
184 const int x = get_x(phase, s->w);
185
186 if (s->do_video) {
187 dst = out->data[0] + x * 4;
188 dst[0] = FFMIN(255, dst[0] + rc);
189 dst[1] = FFMIN(255, dst[1] + gc);
190 dst[2] = FFMIN(255, dst[2] + bc);
191 dst[3] = 255;
192 }
193 fphase += phase;
194 }
195 fphase /= in->nb_samples;
196
197 if (s->do_video) {
198 if (s->draw_median_phase) {
199 dst = out->data[0] + get_x(fphase, s->w) * 4;
200 AV_WL32(dst, AV_RL32(s->mpc));
201 }
202
203 for (i = 1; i < 10 && i < outlink->h; i++)
204 memcpy(out->data[0] + i * out->linesize[0], out->data[0], outlink->w * 4);
205 }
206
207 metadata = avpriv_frame_get_metadatap(in);
208 if (metadata) {
209 uint8_t value[128];
210
211 snprintf(value, sizeof(value), "%f", fphase);
212 av_dict_set(metadata, "lavfi.aphasemeter.phase", value, 0);
213 }
214
215 if (s->do_video) {
216 s->out->pts = in->pts;
217 ff_filter_frame(outlink, av_frame_clone(s->out));
218 }
219 return ff_filter_frame(aoutlink, in);
220}
221
222static av_cold void uninit(AVFilterContext *ctx)
223{
224 AudioPhaseMeterContext *s = ctx->priv;
225 int i;
226
227 av_frame_free(&s->out);
228 for (i = 0; i < ctx->nb_outputs; i++)
229 av_freep(&ctx->output_pads[i].name);
230}
231
232static av_cold int init(AVFilterContext *ctx)
233{
234 AudioPhaseMeterContext *s = ctx->priv;
235 AVFilterPad pad;
236
237 pad = (AVFilterPad){
238 .name = av_strdup("out0"),
239 .type = AVMEDIA_TYPE_AUDIO,
240 };
241 if (!pad.name)
242 return AVERROR(ENOMEM);
243 ff_insert_outpad(ctx, 0, &pad);
244
245 if (s->do_video) {
246 pad = (AVFilterPad){
247 .name = av_strdup("out1"),
248 .type = AVMEDIA_TYPE_VIDEO,
249 .config_props = config_video_output,
250 };
251 if (!pad.name)
252 return AVERROR(ENOMEM);
253 ff_insert_outpad(ctx, 1, &pad);
254 }
255
256 return 0;
257}
258
259static const AVFilterPad inputs[] = {
260 {
261 .name = "default",
262 .type = AVMEDIA_TYPE_AUDIO,
263 .config_props = config_input,
264 .filter_frame = filter_frame,
265 },
266 { NULL }
267};
268
269AVFilter ff_avf_aphasemeter = {
270 .name = "aphasemeter",
271 .description = NULL_IF_CONFIG_SMALL("Convert input audio to phase meter video output."),
272 .init = init,
273 .uninit = uninit,
274 .query_formats = query_formats,
275 .priv_size = sizeof(AudioPhaseMeterContext),
276 .inputs = inputs,
277 .outputs = NULL,
278 .priv_class = &aphasemeter_class,
279 .flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS,
280};
281
generated by cgit at 2024-05-17 03:39:24 (GMT)