h264_metadata: Add option to delete filler data
[libav.git] / libavfilter / af_hdcd.c
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1/*
2 * This file is part of Libav.
3 *
4 * Libav 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 * Libav 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 Libav; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19/**
20 * @file
21 * HDCD decoding filter, using libhdcd
22 */
23
24#include <hdcd/hdcd_simple.h>
25
26#include "libavutil/channel_layout.h"
27#include "libavutil/opt.h"
28
29#include "audio.h"
30#include "avfilter.h"
31#include "formats.h"
32#include "internal.h"
33
34typedef struct HDCDContext {
35 const AVClass *class;
36
37 hdcd_simple *shdcd;
38
39 /* AVOption members */
40 /** analyze mode replaces the audio with a solid tone and adjusts
41 * the amplitude to signal some specific aspect of the decoding
42 * process. See docs or HDCD_ANA_* defines. */
43 int analyze_mode;
44 /* end AVOption members */
45} HDCDContext;
46
47#define OFFSET(x) offsetof(HDCDContext, x)
48#define A AV_OPT_FLAG_AUDIO_PARAM
49#define HDCD_ANA_MAX 6
50static const AVOption hdcd_options[] = {
51 { "analyze_mode", "Replace audio with solid tone and signal some processing aspect in the amplitude.",
52 OFFSET(analyze_mode), AV_OPT_TYPE_INT, { .i64=HDCD_ANA_OFF }, 0, HDCD_ANA_MAX, A, "analyze_mode"},
53 { "off", HDCD_ANA_OFF_DESC, 0, AV_OPT_TYPE_CONST, { .i64 = HDCD_ANA_OFF}, 0, 0, A, "analyze_mode" },
54 { "lle", HDCD_ANA_LLE_DESC, 0, AV_OPT_TYPE_CONST, { .i64 = HDCD_ANA_LLE}, 0, 0, A, "analyze_mode" },
55 { "pe", HDCD_ANA_PE_DESC, 0, AV_OPT_TYPE_CONST, { .i64 = HDCD_ANA_PE}, 0, 0, A, "analyze_mode" },
56 { "cdt", HDCD_ANA_CDT_DESC, 0, AV_OPT_TYPE_CONST, { .i64 = HDCD_ANA_CDT}, 0, 0, A, "analyze_mode" },
57 { "tgm", HDCD_ANA_TGM_DESC, 0, AV_OPT_TYPE_CONST, { .i64 = HDCD_ANA_TGM}, 0, 0, A, "analyze_mode" },
58 { "pel", HDCD_ANA_PEL_DESC, 0, AV_OPT_TYPE_CONST, { .i64 = HDCD_ANA_PEL}, 0, 0, A, "analyze_mode" },
59 { "ltgm", HDCD_ANA_LTGM_DESC, 0, AV_OPT_TYPE_CONST, { .i64 = HDCD_ANA_LTGM}, 0, 0, A, "analyze_mode" },
60 { NULL }
61};
62
63static const AVClass hdcd_class = {
64 .class_name = "HDCD filter",
65 .item_name = av_default_item_name,
66 .option = hdcd_options,
67 .version = LIBAVFILTER_VERSION_INT,
68};
69
70static int filter_frame(AVFilterLink *inlink, AVFrame *in)
71{
72 AVFilterContext *ctx = inlink->dst;
73 HDCDContext *s = ctx->priv;
74 AVFilterLink *outlink = ctx->outputs[0];
75 AVFrame *out;
76 const int16_t *in_data;
77 int32_t *out_data;
78 int n, result;
79 int channel_count = av_get_channel_layout_nb_channels(in->channel_layout);
80
81 out = ff_get_audio_buffer(outlink, in->nb_samples);
82 if (!out) {
83 av_frame_free(&in);
84 return AVERROR(ENOMEM);
85 }
86 result = av_frame_copy_props(out, in);
87 if (result) {
88 av_frame_free(&out);
89 av_frame_free(&in);
90 return result;
91 }
92
93 in_data = (int16_t *)in->data[0];
94 out_data = (int32_t *)out->data[0];
95 for (n = 0; n < in->nb_samples * channel_count; n++)
96 out_data[n] = in_data[n];
97
98 hdcd_process(s->shdcd, out_data, in->nb_samples);
99
100 av_frame_free(&in);
101 return ff_filter_frame(outlink, out);
102}
103
104static int query_formats(AVFilterContext *ctx)
105{
106 AVFilterFormats *in_formats, *out_formats, *sample_rates = NULL;
107 AVFilterChannelLayouts *layouts = NULL;
108 AVFilterLink *inlink = ctx->inputs[0];
109 AVFilterLink *outlink = ctx->outputs[0];
110
111 static const enum AVSampleFormat sample_fmts_in[] = {
112 AV_SAMPLE_FMT_S16,
113 AV_SAMPLE_FMT_NONE
114 };
115 static const enum AVSampleFormat sample_fmts_out[] = {
116 AV_SAMPLE_FMT_S32,
117 AV_SAMPLE_FMT_NONE
118 };
119
120 ff_add_channel_layout(&layouts, AV_CH_LAYOUT_STEREO);
121
122 ff_set_common_channel_layouts(ctx, layouts);
123
124 in_formats = ff_make_format_list(sample_fmts_in);
125 out_formats = ff_make_format_list(sample_fmts_out);
126 if (!in_formats || !out_formats)
127 return AVERROR(ENOMEM);
128
129 ff_formats_ref(in_formats, &inlink->out_formats);
130 ff_formats_ref(out_formats, &outlink->in_formats);
131
132 ff_add_format(&sample_rates, 44100);
133 ff_set_common_samplerates(ctx, sample_rates);
134 return 0;
135}
136
137static av_cold void uninit(AVFilterContext *ctx)
138{
139 HDCDContext *s = ctx->priv;
140 char detect_str[256] = "";
141
142 /* log the HDCD decode information */
143 hdcd_detect_str(s->shdcd, detect_str, sizeof(detect_str));
144 av_log(ctx, AV_LOG_INFO, "%s\n", detect_str);
145
146 hdcd_free(s->shdcd);
147}
148
149/** callback for error logging */
150static void af_hdcd_log(const void *priv, const char *fmt, va_list args)
151{
152 av_vlog((AVFilterContext *)priv, AV_LOG_VERBOSE, fmt, args);
153}
154
155static av_cold int init(AVFilterContext *ctx)
156{
157 HDCDContext *s = ctx->priv;
158
159 s->shdcd = hdcd_new();
160 hdcd_logger_attach(s->shdcd, af_hdcd_log, ctx);
161
162 if (s->analyze_mode)
163 hdcd_analyze_mode(s->shdcd, s->analyze_mode);
164 av_log(ctx, AV_LOG_VERBOSE, "Analyze mode: [%d] %s\n",
165 s->analyze_mode, hdcd_str_analyze_mode_desc(s->analyze_mode));
166
167 return 0;
168}
169
170static const AVFilterPad avfilter_af_hdcd_inputs[] = {
171 {
172 .name = "default",
173 .type = AVMEDIA_TYPE_AUDIO,
174 .filter_frame = filter_frame,
175 },
176 { NULL }
177};
178
179static const AVFilterPad avfilter_af_hdcd_outputs[] = {
180 {
181 .name = "default",
182 .type = AVMEDIA_TYPE_AUDIO,
183 },
184 { NULL }
185};
186
187AVFilter ff_af_hdcd = {
188 .name = "hdcd",
189 .description = NULL_IF_CONFIG_SMALL("Apply High Definition Compatible Digital (HDCD) decoding."),
190 .priv_size = sizeof(HDCDContext),
191 .priv_class = &hdcd_class,
192 .init = init,
193 .uninit = uninit,
194 .query_formats = query_formats,
195 .inputs = avfilter_af_hdcd_inputs,
196 .outputs = avfilter_af_hdcd_outputs,
197};