| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * This file is part of FFmpeg. | ||
| 3 | * | ||
| 4 | * FFmpeg is free software; you can redistribute it and/or | ||
| 5 | * modify it under the terms of the GNU Lesser General Public | ||
| 6 | * License as published by the Free Software Foundation; either | ||
| 7 | * version 2.1 of the License, or (at your option) any later version. | ||
| 8 | * | ||
| 9 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 12 | * Lesser General Public License for more details. | ||
| 13 | * | ||
| 14 | * You should have received a copy of the GNU Lesser General Public | ||
| 15 | * License along with FFmpeg; if not, write to the Free Software | ||
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 17 | */ | ||
| 18 | |||
| 19 | #include "libavutil/opt.h" | ||
| 20 | #include "audio.h" | ||
| 21 | #include "avfilter.h" | ||
| 22 | #include "filters.h" | ||
| 23 | |||
| 24 | typedef struct ADerivativeContext { | ||
| 25 | const AVClass *class; | ||
| 26 | AVFrame *prev; | ||
| 27 | void (*filter)(void **dst, void **prv, const void **src, | ||
| 28 | int nb_samples, int channels); | ||
| 29 | } ADerivativeContext; | ||
| 30 | |||
| 31 | #define DERIVATIVE(name, type) \ | ||
| 32 | static void aderivative_## name ##p(void **d, void **p, const void **s, \ | ||
| 33 | int nb_samples, int channels) \ | ||
| 34 | { \ | ||
| 35 | int n, c; \ | ||
| 36 | \ | ||
| 37 | for (c = 0; c < channels; c++) { \ | ||
| 38 | const type *src = s[c]; \ | ||
| 39 | type *dst = d[c]; \ | ||
| 40 | type *prv = p[c]; \ | ||
| 41 | \ | ||
| 42 | for (n = 0; n < nb_samples; n++) { \ | ||
| 43 | const type current = src[n]; \ | ||
| 44 | \ | ||
| 45 | dst[n] = current - prv[0]; \ | ||
| 46 | prv[0] = current; \ | ||
| 47 | } \ | ||
| 48 | } \ | ||
| 49 | } | ||
| 50 | |||
| 51 | ✗ | DERIVATIVE(flt, float) | |
| 52 | ✗ | DERIVATIVE(dbl, double) | |
| 53 | ✗ | DERIVATIVE(s16, int16_t) | |
| 54 | ✗ | DERIVATIVE(s32, int32_t) | |
| 55 | |||
| 56 | #define INTEGRAL(name, type) \ | ||
| 57 | static void aintegral_## name ##p(void **d, void **p, const void **s, \ | ||
| 58 | int nb_samples, int channels) \ | ||
| 59 | { \ | ||
| 60 | int n, c; \ | ||
| 61 | \ | ||
| 62 | for (c = 0; c < channels; c++) { \ | ||
| 63 | const type *src = s[c]; \ | ||
| 64 | type *dst = d[c]; \ | ||
| 65 | type *prv = p[c]; \ | ||
| 66 | \ | ||
| 67 | for (n = 0; n < nb_samples; n++) { \ | ||
| 68 | const type current = src[n]; \ | ||
| 69 | \ | ||
| 70 | dst[n] = current + prv[0]; \ | ||
| 71 | prv[0] = dst[n]; \ | ||
| 72 | } \ | ||
| 73 | } \ | ||
| 74 | } | ||
| 75 | |||
| 76 | ✗ | INTEGRAL(flt, float) | |
| 77 | ✗ | INTEGRAL(dbl, double) | |
| 78 | |||
| 79 | ✗ | static int config_input(AVFilterLink *inlink) | |
| 80 | { | ||
| 81 | ✗ | AVFilterContext *ctx = inlink->dst; | |
| 82 | ✗ | ADerivativeContext *s = ctx->priv; | |
| 83 | |||
| 84 | ✗ | switch (inlink->format) { | |
| 85 | ✗ | case AV_SAMPLE_FMT_FLTP: s->filter = aderivative_fltp; break; | |
| 86 | ✗ | case AV_SAMPLE_FMT_DBLP: s->filter = aderivative_dblp; break; | |
| 87 | ✗ | case AV_SAMPLE_FMT_S32P: s->filter = aderivative_s32p; break; | |
| 88 | ✗ | case AV_SAMPLE_FMT_S16P: s->filter = aderivative_s16p; break; | |
| 89 | } | ||
| 90 | |||
| 91 | ✗ | if (strcmp(ctx->filter->name, "aintegral")) | |
| 92 | ✗ | return 0; | |
| 93 | |||
| 94 | ✗ | switch (inlink->format) { | |
| 95 | ✗ | case AV_SAMPLE_FMT_FLTP: s->filter = aintegral_fltp; break; | |
| 96 | ✗ | case AV_SAMPLE_FMT_DBLP: s->filter = aintegral_dblp; break; | |
| 97 | } | ||
| 98 | |||
| 99 | ✗ | return 0; | |
| 100 | } | ||
| 101 | |||
| 102 | ✗ | static int filter_frame(AVFilterLink *inlink, AVFrame *in) | |
| 103 | { | ||
| 104 | ✗ | AVFilterContext *ctx = inlink->dst; | |
| 105 | ✗ | ADerivativeContext *s = ctx->priv; | |
| 106 | ✗ | AVFilterLink *outlink = ctx->outputs[0]; | |
| 107 | AVFrame *out; | ||
| 108 | |||
| 109 | ✗ | if (ctx->is_disabled) { | |
| 110 | ✗ | if (s->prev) | |
| 111 | ✗ | av_samples_set_silence(s->prev->extended_data, 0, 1, | |
| 112 | ✗ | s->prev->ch_layout.nb_channels, | |
| 113 | ✗ | s->prev->format); | |
| 114 | |||
| 115 | ✗ | return ff_filter_frame(outlink, in); | |
| 116 | } | ||
| 117 | |||
| 118 | ✗ | out = ff_get_audio_buffer(outlink, in->nb_samples); | |
| 119 | ✗ | if (!out) { | |
| 120 | ✗ | av_frame_free(&in); | |
| 121 | ✗ | return AVERROR(ENOMEM); | |
| 122 | } | ||
| 123 | ✗ | av_frame_copy_props(out, in); | |
| 124 | |||
| 125 | ✗ | if (!s->prev) { | |
| 126 | ✗ | s->prev = ff_get_audio_buffer(inlink, 1); | |
| 127 | ✗ | if (!s->prev) { | |
| 128 | ✗ | av_frame_free(&in); | |
| 129 | ✗ | av_frame_free(&out); | |
| 130 | ✗ | return AVERROR(ENOMEM); | |
| 131 | } | ||
| 132 | } | ||
| 133 | |||
| 134 | ✗ | s->filter((void **)out->extended_data, (void **)s->prev->extended_data, (const void **)in->extended_data, | |
| 135 | ✗ | in->nb_samples, in->ch_layout.nb_channels); | |
| 136 | |||
| 137 | ✗ | av_frame_free(&in); | |
| 138 | ✗ | return ff_filter_frame(outlink, out); | |
| 139 | } | ||
| 140 | |||
| 141 | ✗ | static av_cold void uninit(AVFilterContext *ctx) | |
| 142 | { | ||
| 143 | ✗ | ADerivativeContext *s = ctx->priv; | |
| 144 | |||
| 145 | ✗ | av_frame_free(&s->prev); | |
| 146 | ✗ | } | |
| 147 | |||
| 148 | static const AVFilterPad aderivative_inputs[] = { | ||
| 149 | { | ||
| 150 | .name = "default", | ||
| 151 | .type = AVMEDIA_TYPE_AUDIO, | ||
| 152 | .filter_frame = filter_frame, | ||
| 153 | .config_props = config_input, | ||
| 154 | }, | ||
| 155 | }; | ||
| 156 | |||
| 157 | static const AVOption aderivative_options[] = { | ||
| 158 | { NULL } | ||
| 159 | }; | ||
| 160 | |||
| 161 | AVFILTER_DEFINE_CLASS_EXT(aderivative, "aderivative/aintegral", aderivative_options); | ||
| 162 | |||
| 163 | const AVFilter ff_af_aderivative = { | ||
| 164 | .name = "aderivative", | ||
| 165 | .description = NULL_IF_CONFIG_SMALL("Compute derivative of input audio."), | ||
| 166 | .priv_size = sizeof(ADerivativeContext), | ||
| 167 | .priv_class = &aderivative_class, | ||
| 168 | .uninit = uninit, | ||
| 169 | FILTER_INPUTS(aderivative_inputs), | ||
| 170 | FILTER_OUTPUTS(ff_audio_default_filterpad), | ||
| 171 | FILTER_SAMPLEFMTS(AV_SAMPLE_FMT_S16P, AV_SAMPLE_FMT_FLTP, | ||
| 172 | AV_SAMPLE_FMT_S32P, AV_SAMPLE_FMT_DBLP), | ||
| 173 | .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL, | ||
| 174 | }; | ||
| 175 | |||
| 176 | const AVFilter ff_af_aintegral = { | ||
| 177 | .name = "aintegral", | ||
| 178 | .description = NULL_IF_CONFIG_SMALL("Compute integral of input audio."), | ||
| 179 | .priv_size = sizeof(ADerivativeContext), | ||
| 180 | .priv_class = &aderivative_class, | ||
| 181 | .uninit = uninit, | ||
| 182 | FILTER_INPUTS(aderivative_inputs), | ||
| 183 | FILTER_OUTPUTS(ff_audio_default_filterpad), | ||
| 184 | FILTER_SAMPLEFMTS(AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_DBLP), | ||
| 185 | .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL, | ||
| 186 | }; | ||
| 187 |