| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Copyright (c) 2013 Clément Bœsch | ||
| 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 "config_components.h" | ||
| 22 | |||
| 23 | #include "libavutil/lfg.h" | ||
| 24 | #include "libavutil/opt.h" | ||
| 25 | #include "libavutil/random_seed.h" | ||
| 26 | #include "audio.h" | ||
| 27 | #include "filters.h" | ||
| 28 | #include "video.h" | ||
| 29 | |||
| 30 | enum mode { | ||
| 31 | MODE_NONE, | ||
| 32 | MODE_RO, | ||
| 33 | MODE_RW, | ||
| 34 | MODE_TOGGLE, | ||
| 35 | MODE_RANDOM, | ||
| 36 | NB_MODES | ||
| 37 | }; | ||
| 38 | |||
| 39 | typedef struct PermsContext { | ||
| 40 | const AVClass *class; | ||
| 41 | AVLFG lfg; | ||
| 42 | int64_t random_seed; | ||
| 43 | int mode; | ||
| 44 | } PermsContext; | ||
| 45 | |||
| 46 | #define OFFSET(x) offsetof(PermsContext, x) | ||
| 47 | #define FLAGS AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_VIDEO_PARAM | ||
| 48 | #define TFLAGS AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_RUNTIME_PARAM | ||
| 49 | |||
| 50 | static const AVOption options[] = { | ||
| 51 | { "mode", "select permissions mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64 = MODE_NONE}, MODE_NONE, NB_MODES-1, TFLAGS, .unit = "mode" }, | ||
| 52 | { "none", "do nothing", 0, AV_OPT_TYPE_CONST, {.i64 = MODE_NONE}, 0, 0, TFLAGS, .unit = "mode" }, | ||
| 53 | { "ro", "set all output frames read-only", 0, AV_OPT_TYPE_CONST, {.i64 = MODE_RO}, 0, 0, TFLAGS, .unit = "mode" }, | ||
| 54 | { "rw", "set all output frames writable", 0, AV_OPT_TYPE_CONST, {.i64 = MODE_RW}, 0, 0, TFLAGS, .unit = "mode" }, | ||
| 55 | { "toggle", "switch permissions", 0, AV_OPT_TYPE_CONST, {.i64 = MODE_TOGGLE}, 0, 0, TFLAGS, .unit = "mode" }, | ||
| 56 | { "random", "set permissions randomly", 0, AV_OPT_TYPE_CONST, {.i64 = MODE_RANDOM}, 0, 0, TFLAGS, .unit = "mode" }, | ||
| 57 | { "seed", "set the seed for the random mode", OFFSET(random_seed), AV_OPT_TYPE_INT64, {.i64 = -1}, -1, UINT32_MAX, FLAGS }, | ||
| 58 | { NULL } | ||
| 59 | }; | ||
| 60 | |||
| 61 | 28 | static av_cold int init(AVFilterContext *ctx) | |
| 62 | { | ||
| 63 | 28 | PermsContext *s = ctx->priv; | |
| 64 | uint32_t seed; | ||
| 65 | |||
| 66 |
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28 | if (s->random_seed == -1) |
| 67 | 28 | s->random_seed = av_get_random_seed(); | |
| 68 | 28 | seed = s->random_seed; | |
| 69 | 28 | av_log(ctx, AV_LOG_INFO, "random seed: 0x%08"PRIx32"\n", seed); | |
| 70 | 28 | av_lfg_init(&s->lfg, seed); | |
| 71 | |||
| 72 | 28 | return 0; | |
| 73 | } | ||
| 74 | |||
| 75 | enum perm { RO, RW }; | ||
| 76 | static const char * const perm_str[2] = { "RO", "RW" }; | ||
| 77 | |||
| 78 | 497 | static int filter_frame(AVFilterLink *inlink, AVFrame *frame) | |
| 79 | { | ||
| 80 | int ret; | ||
| 81 | 497 | AVFilterContext *ctx = inlink->dst; | |
| 82 | 497 | PermsContext *s = ctx->priv; | |
| 83 | 497 | AVFrame *out = frame; | |
| 84 | 497 | enum perm in_perm = av_frame_is_writable(frame) ? RW : RO; | |
| 85 | enum perm out_perm; | ||
| 86 | |||
| 87 |
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497 | switch (s->mode) { |
| 88 | ✗ | case MODE_TOGGLE: out_perm = in_perm == RO ? RW : RO; break; | |
| 89 | 497 | case MODE_RANDOM: out_perm = av_lfg_get(&s->lfg) & 1 ? RW : RO; break; | |
| 90 | ✗ | case MODE_RO: out_perm = RO; break; | |
| 91 | ✗ | case MODE_RW: out_perm = RW; break; | |
| 92 | ✗ | default: out_perm = in_perm; break; | |
| 93 | } | ||
| 94 | |||
| 95 |
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497 | av_log(ctx, AV_LOG_VERBOSE, "%s -> %s%s\n", |
| 96 | 497 | perm_str[in_perm], perm_str[out_perm], | |
| 97 | in_perm == out_perm ? " (no-op)" : ""); | ||
| 98 | |||
| 99 |
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497 | if (in_perm == RO && out_perm == RW) { |
| 100 |
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62 | if ((ret = ff_inlink_make_frame_writable(inlink, &frame)) < 0) |
| 101 | ✗ | return ret; | |
| 102 | 62 | out = frame; | |
| 103 |
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435 | } else if (in_perm == RW && out_perm == RO) { |
| 104 | 195 | out = av_frame_clone(frame); | |
| 105 |
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195 | if (!out) |
| 106 | ✗ | return AVERROR(ENOMEM); | |
| 107 | } | ||
| 108 | |||
| 109 | 497 | ret = ff_filter_frame(ctx->outputs[0], out); | |
| 110 | |||
| 111 |
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497 | if (in_perm == RW && out_perm == RO) |
| 112 | 195 | av_frame_free(&frame); | |
| 113 | 497 | return ret; | |
| 114 | } | ||
| 115 | |||
| 116 | AVFILTER_DEFINE_CLASS_EXT(perms, "(a)perms", options); | ||
| 117 | |||
| 118 | #if CONFIG_APERMS_FILTER | ||
| 119 | |||
| 120 | static const AVFilterPad aperms_inputs[] = { | ||
| 121 | { | ||
| 122 | .name = "default", | ||
| 123 | .type = AVMEDIA_TYPE_AUDIO, | ||
| 124 | .filter_frame = filter_frame, | ||
| 125 | }, | ||
| 126 | }; | ||
| 127 | |||
| 128 | const AVFilter ff_af_aperms = { | ||
| 129 | .name = "aperms", | ||
| 130 | .description = NULL_IF_CONFIG_SMALL("Set permissions for the output audio frame."), | ||
| 131 | .priv_class = &perms_class, | ||
| 132 | .init = init, | ||
| 133 | .priv_size = sizeof(PermsContext), | ||
| 134 | FILTER_INPUTS(aperms_inputs), | ||
| 135 | FILTER_OUTPUTS(ff_audio_default_filterpad), | ||
| 136 | .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | | ||
| 137 | AVFILTER_FLAG_METADATA_ONLY, | ||
| 138 | .process_command = ff_filter_process_command, | ||
| 139 | }; | ||
| 140 | #endif /* CONFIG_APERMS_FILTER */ | ||
| 141 | |||
| 142 | #if CONFIG_PERMS_FILTER | ||
| 143 | |||
| 144 | static const AVFilterPad perms_inputs[] = { | ||
| 145 | { | ||
| 146 | .name = "default", | ||
| 147 | .type = AVMEDIA_TYPE_VIDEO, | ||
| 148 | .filter_frame = filter_frame, | ||
| 149 | }, | ||
| 150 | }; | ||
| 151 | |||
| 152 | const AVFilter ff_vf_perms = { | ||
| 153 | .name = "perms", | ||
| 154 | .description = NULL_IF_CONFIG_SMALL("Set permissions for the output video frame."), | ||
| 155 | .init = init, | ||
| 156 | .priv_size = sizeof(PermsContext), | ||
| 157 | FILTER_INPUTS(perms_inputs), | ||
| 158 | FILTER_OUTPUTS(ff_video_default_filterpad), | ||
| 159 | .priv_class = &perms_class, | ||
| 160 | .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | | ||
| 161 | AVFILTER_FLAG_METADATA_ONLY, | ||
| 162 | .process_command = ff_filter_process_command, | ||
| 163 | }; | ||
| 164 | #endif /* CONFIG_PERMS_FILTER */ | ||
| 165 |