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 "libavutil/lfg.h" |
22 |
|
|
#include "libavutil/opt.h" |
23 |
|
|
#include "libavutil/random_seed.h" |
24 |
|
|
#include "audio.h" |
25 |
|
|
#include "video.h" |
26 |
|
|
|
27 |
|
|
enum mode { |
28 |
|
|
MODE_NONE, |
29 |
|
|
MODE_RO, |
30 |
|
|
MODE_RW, |
31 |
|
|
MODE_TOGGLE, |
32 |
|
|
MODE_RANDOM, |
33 |
|
|
NB_MODES |
34 |
|
|
}; |
35 |
|
|
|
36 |
|
|
typedef struct PermsContext { |
37 |
|
|
const AVClass *class; |
38 |
|
|
AVLFG lfg; |
39 |
|
|
int64_t random_seed; |
40 |
|
|
int mode; |
41 |
|
|
} PermsContext; |
42 |
|
|
|
43 |
|
|
#define OFFSET(x) offsetof(PermsContext, x) |
44 |
|
|
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_VIDEO_PARAM |
45 |
|
|
|
46 |
|
|
static const AVOption options[] = { |
47 |
|
|
{ "mode", "select permissions mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64 = MODE_NONE}, MODE_NONE, NB_MODES-1, FLAGS, "mode" }, |
48 |
|
|
{ "none", "do nothing", 0, AV_OPT_TYPE_CONST, {.i64 = MODE_NONE}, INT_MIN, INT_MAX, FLAGS, "mode" }, |
49 |
|
|
{ "ro", "set all output frames read-only", 0, AV_OPT_TYPE_CONST, {.i64 = MODE_RO}, INT_MIN, INT_MAX, FLAGS, "mode" }, |
50 |
|
|
{ "rw", "set all output frames writable", 0, AV_OPT_TYPE_CONST, {.i64 = MODE_RW}, INT_MIN, INT_MAX, FLAGS, "mode" }, |
51 |
|
|
{ "toggle", "switch permissions", 0, AV_OPT_TYPE_CONST, {.i64 = MODE_TOGGLE}, INT_MIN, INT_MAX, FLAGS, "mode" }, |
52 |
|
|
{ "random", "set permissions randomly", 0, AV_OPT_TYPE_CONST, {.i64 = MODE_RANDOM}, INT_MIN, INT_MAX, FLAGS, "mode" }, |
53 |
|
|
{ "seed", "set the seed for the random mode", OFFSET(random_seed), AV_OPT_TYPE_INT64, {.i64 = -1}, -1, UINT32_MAX, FLAGS }, |
54 |
|
|
{ NULL } |
55 |
|
|
}; |
56 |
|
|
|
57 |
|
15 |
static av_cold int init(AVFilterContext *ctx) |
58 |
|
|
{ |
59 |
|
15 |
PermsContext *s = ctx->priv; |
60 |
|
|
|
61 |
✓✗ |
15 |
if (s->mode == MODE_RANDOM) { |
62 |
|
|
uint32_t seed; |
63 |
|
|
|
64 |
✓✗ |
15 |
if (s->random_seed == -1) |
65 |
|
15 |
s->random_seed = av_get_random_seed(); |
66 |
|
15 |
seed = s->random_seed; |
67 |
|
15 |
av_log(ctx, AV_LOG_INFO, "random seed: 0x%08"PRIx32"\n", seed); |
68 |
|
15 |
av_lfg_init(&s->lfg, seed); |
69 |
|
|
} |
70 |
|
|
|
71 |
|
15 |
return 0; |
72 |
|
|
} |
73 |
|
|
|
74 |
|
|
enum perm { RO, RW }; |
75 |
|
|
static const char * const perm_str[2] = { "RO", "RW" }; |
76 |
|
|
|
77 |
|
691 |
static int filter_frame(AVFilterLink *inlink, AVFrame *frame) |
78 |
|
|
{ |
79 |
|
|
int ret; |
80 |
|
691 |
AVFilterContext *ctx = inlink->dst; |
81 |
|
691 |
PermsContext *s = ctx->priv; |
82 |
|
691 |
AVFrame *out = frame; |
83 |
|
691 |
enum perm in_perm = av_frame_is_writable(frame) ? RW : RO; |
84 |
|
|
enum perm out_perm; |
85 |
|
|
|
86 |
✗✓✗✗ ✗ |
691 |
switch (s->mode) { |
87 |
|
|
case MODE_TOGGLE: out_perm = in_perm == RO ? RW : RO; break; |
88 |
|
691 |
case MODE_RANDOM: out_perm = av_lfg_get(&s->lfg) & 1 ? RW : RO; break; |
89 |
|
|
case MODE_RO: out_perm = RO; break; |
90 |
|
|
case MODE_RW: out_perm = RW; break; |
91 |
|
|
default: out_perm = in_perm; break; |
92 |
|
|
} |
93 |
|
|
|
94 |
✓✓ |
691 |
av_log(ctx, AV_LOG_VERBOSE, "%s -> %s%s\n", |
95 |
|
|
perm_str[in_perm], perm_str[out_perm], |
96 |
|
|
in_perm == out_perm ? " (no-op)" : ""); |
97 |
|
|
|
98 |
✓✓✓✓
|
691 |
if (in_perm == RO && out_perm == RW) { |
99 |
✗✓ |
93 |
if ((ret = av_frame_make_writable(frame)) < 0) |
100 |
|
|
return ret; |
101 |
✓✓✓✓
|
598 |
} else if (in_perm == RW && out_perm == RO) { |
102 |
|
276 |
out = av_frame_clone(frame); |
103 |
✗✓ |
276 |
if (!out) |
104 |
|
|
return AVERROR(ENOMEM); |
105 |
|
|
} |
106 |
|
|
|
107 |
|
691 |
ret = ff_filter_frame(ctx->outputs[0], out); |
108 |
|
|
|
109 |
✓✓✓✓
|
691 |
if (in_perm == RW && out_perm == RO) |
110 |
|
276 |
av_frame_free(&frame); |
111 |
|
691 |
return ret; |
112 |
|
|
} |
113 |
|
|
|
114 |
|
|
#if CONFIG_APERMS_FILTER |
115 |
|
|
|
116 |
|
|
#define aperms_options options |
117 |
|
|
AVFILTER_DEFINE_CLASS(aperms); |
118 |
|
|
|
119 |
|
|
static const AVFilterPad aperms_inputs[] = { |
120 |
|
|
{ |
121 |
|
|
.name = "default", |
122 |
|
|
.type = AVMEDIA_TYPE_AUDIO, |
123 |
|
|
.filter_frame = filter_frame, |
124 |
|
|
}, |
125 |
|
|
{ NULL } |
126 |
|
|
}; |
127 |
|
|
|
128 |
|
|
static const AVFilterPad aperms_outputs[] = { |
129 |
|
|
{ |
130 |
|
|
.name = "default", |
131 |
|
|
.type = AVMEDIA_TYPE_AUDIO, |
132 |
|
|
}, |
133 |
|
|
{ NULL } |
134 |
|
|
}; |
135 |
|
|
|
136 |
|
|
AVFilter ff_af_aperms = { |
137 |
|
|
.name = "aperms", |
138 |
|
|
.description = NULL_IF_CONFIG_SMALL("Set permissions for the output audio frame."), |
139 |
|
|
.init = init, |
140 |
|
|
.priv_size = sizeof(PermsContext), |
141 |
|
|
.inputs = aperms_inputs, |
142 |
|
|
.outputs = aperms_outputs, |
143 |
|
|
.priv_class = &aperms_class, |
144 |
|
|
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, |
145 |
|
|
}; |
146 |
|
|
#endif /* CONFIG_APERMS_FILTER */ |
147 |
|
|
|
148 |
|
|
#if CONFIG_PERMS_FILTER |
149 |
|
|
|
150 |
|
|
#define perms_options options |
151 |
|
|
AVFILTER_DEFINE_CLASS(perms); |
152 |
|
|
|
153 |
|
|
static const AVFilterPad perms_inputs[] = { |
154 |
|
|
{ |
155 |
|
|
.name = "default", |
156 |
|
|
.type = AVMEDIA_TYPE_VIDEO, |
157 |
|
|
.filter_frame = filter_frame, |
158 |
|
|
}, |
159 |
|
|
{ NULL } |
160 |
|
|
}; |
161 |
|
|
|
162 |
|
|
static const AVFilterPad perms_outputs[] = { |
163 |
|
|
{ |
164 |
|
|
.name = "default", |
165 |
|
|
.type = AVMEDIA_TYPE_VIDEO, |
166 |
|
|
}, |
167 |
|
|
{ NULL } |
168 |
|
|
}; |
169 |
|
|
|
170 |
|
|
AVFilter ff_vf_perms = { |
171 |
|
|
.name = "perms", |
172 |
|
|
.description = NULL_IF_CONFIG_SMALL("Set permissions for the output video frame."), |
173 |
|
|
.init = init, |
174 |
|
|
.priv_size = sizeof(PermsContext), |
175 |
|
|
.inputs = perms_inputs, |
176 |
|
|
.outputs = perms_outputs, |
177 |
|
|
.priv_class = &perms_class, |
178 |
|
|
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, |
179 |
|
|
}; |
180 |
|
|
#endif /* CONFIG_PERMS_FILTER */ |