mirror of https://github.com/FFmpeg/FFmpeg.git
Signed-off-by: Burt P <pburt0@gmail.com> Signed-off-by: Diego Biurrun <diego@biurrun.de> Signed-off-by: Luca Barbato <lu_zero@gentoo.org>pull/244/merge
Burt P
8 years ago
committed by
Luca Barbato
parent
95f8029345
commit
728e80cd2e
8 changed files with 261 additions and 1 deletions
@ -0,0 +1,197 @@ |
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/*
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* This file is part of Libav. |
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* |
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* Libav is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* Libav is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with Libav; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/**
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* @file |
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* HDCD decoding filter, using libhdcd |
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*/ |
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#include <hdcd/hdcd_simple.h> |
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#include "libavutil/channel_layout.h" |
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#include "libavutil/opt.h" |
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#include "audio.h" |
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#include "avfilter.h" |
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#include "formats.h" |
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#include "internal.h" |
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typedef struct HDCDContext { |
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const AVClass *class; |
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hdcd_simple *shdcd; |
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/* AVOption members */ |
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/** analyze mode replaces the audio with a solid tone and adjusts
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* the amplitude to signal some specific aspect of the decoding |
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* process. See docs or HDCD_ANA_* defines. */ |
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int analyze_mode; |
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/* end AVOption members */ |
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} HDCDContext; |
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#define OFFSET(x) offsetof(HDCDContext, x) |
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#define A AV_OPT_FLAG_AUDIO_PARAM |
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#define HDCD_ANA_MAX 6 |
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static const AVOption hdcd_options[] = { |
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{ "analyze_mode", "Replace audio with solid tone and signal some processing aspect in the amplitude.", |
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OFFSET(analyze_mode), AV_OPT_TYPE_INT, { .i64=HDCD_ANA_OFF }, 0, HDCD_ANA_MAX, A, "analyze_mode"}, |
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{ "off", HDCD_ANA_OFF_DESC, 0, AV_OPT_TYPE_CONST, { .i64 = HDCD_ANA_OFF}, 0, 0, A, "analyze_mode" }, |
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{ "lle", HDCD_ANA_LLE_DESC, 0, AV_OPT_TYPE_CONST, { .i64 = HDCD_ANA_LLE}, 0, 0, A, "analyze_mode" }, |
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{ "pe", HDCD_ANA_PE_DESC, 0, AV_OPT_TYPE_CONST, { .i64 = HDCD_ANA_PE}, 0, 0, A, "analyze_mode" }, |
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{ "cdt", HDCD_ANA_CDT_DESC, 0, AV_OPT_TYPE_CONST, { .i64 = HDCD_ANA_CDT}, 0, 0, A, "analyze_mode" }, |
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{ "tgm", HDCD_ANA_TGM_DESC, 0, AV_OPT_TYPE_CONST, { .i64 = HDCD_ANA_TGM}, 0, 0, A, "analyze_mode" }, |
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{ "pel", HDCD_ANA_PEL_DESC, 0, AV_OPT_TYPE_CONST, { .i64 = HDCD_ANA_PEL}, 0, 0, A, "analyze_mode" }, |
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{ "ltgm", HDCD_ANA_LTGM_DESC, 0, AV_OPT_TYPE_CONST, { .i64 = HDCD_ANA_LTGM}, 0, 0, A, "analyze_mode" }, |
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{ NULL } |
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}; |
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static const AVClass hdcd_class = { |
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.class_name = "HDCD filter", |
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.item_name = av_default_item_name, |
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.option = hdcd_options, |
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.version = LIBAVFILTER_VERSION_INT, |
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}; |
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static int filter_frame(AVFilterLink *inlink, AVFrame *in) |
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{ |
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AVFilterContext *ctx = inlink->dst; |
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HDCDContext *s = ctx->priv; |
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AVFilterLink *outlink = ctx->outputs[0]; |
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AVFrame *out; |
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const int16_t *in_data; |
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int32_t *out_data; |
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int n, result; |
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int channel_count = av_get_channel_layout_nb_channels(in->channel_layout); |
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out = ff_get_audio_buffer(outlink, in->nb_samples); |
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if (!out) { |
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av_frame_free(&in); |
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return AVERROR(ENOMEM); |
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} |
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result = av_frame_copy_props(out, in); |
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if (result) { |
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av_frame_free(&out); |
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av_frame_free(&in); |
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return result; |
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} |
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in_data = (int16_t *)in->data[0]; |
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out_data = (int32_t *)out->data[0]; |
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for (n = 0; n < in->nb_samples * channel_count; n++) |
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out_data[n] = in_data[n]; |
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hdcd_process(s->shdcd, out_data, in->nb_samples); |
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av_frame_free(&in); |
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return ff_filter_frame(outlink, out); |
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} |
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static int query_formats(AVFilterContext *ctx) |
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{ |
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AVFilterFormats *in_formats, *out_formats, *sample_rates = NULL; |
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AVFilterChannelLayouts *layouts = NULL; |
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AVFilterLink *inlink = ctx->inputs[0]; |
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AVFilterLink *outlink = ctx->outputs[0]; |
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static const enum AVSampleFormat sample_fmts_in[] = { |
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AV_SAMPLE_FMT_S16, |
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AV_SAMPLE_FMT_NONE |
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}; |
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static const enum AVSampleFormat sample_fmts_out[] = { |
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AV_SAMPLE_FMT_S32, |
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AV_SAMPLE_FMT_NONE |
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}; |
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ff_add_channel_layout(&layouts, AV_CH_LAYOUT_STEREO); |
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ff_set_common_channel_layouts(ctx, layouts); |
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in_formats = ff_make_format_list(sample_fmts_in); |
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out_formats = ff_make_format_list(sample_fmts_out); |
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if (!in_formats || !out_formats) |
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return AVERROR(ENOMEM); |
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ff_formats_ref(in_formats, &inlink->out_formats); |
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ff_formats_ref(out_formats, &outlink->in_formats); |
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ff_add_format(&sample_rates, 44100); |
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ff_set_common_samplerates(ctx, sample_rates); |
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return 0; |
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} |
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static av_cold void uninit(AVFilterContext *ctx) |
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{ |
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HDCDContext *s = ctx->priv; |
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char detect_str[256] = ""; |
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/* log the HDCD decode information */ |
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hdcd_detect_str(s->shdcd, detect_str, sizeof(detect_str)); |
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av_log(ctx, AV_LOG_INFO, "%s\n", detect_str); |
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hdcd_free(s->shdcd); |
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} |
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/** callback for error logging */ |
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static void af_hdcd_log(const void *priv, const char *fmt, va_list args) |
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{ |
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av_vlog((AVFilterContext *)priv, AV_LOG_VERBOSE, fmt, args); |
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} |
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static av_cold int init(AVFilterContext *ctx) |
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{ |
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HDCDContext *s = ctx->priv; |
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s->shdcd = hdcd_new(); |
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hdcd_logger_attach(s->shdcd, af_hdcd_log, ctx); |
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if (s->analyze_mode) |
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hdcd_analyze_mode(s->shdcd, s->analyze_mode); |
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av_log(ctx, AV_LOG_VERBOSE, "Analyze mode: [%d] %s\n", |
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s->analyze_mode, hdcd_str_analyze_mode_desc(s->analyze_mode)); |
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return 0; |
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} |
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static const AVFilterPad avfilter_af_hdcd_inputs[] = { |
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{ |
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.name = "default", |
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.type = AVMEDIA_TYPE_AUDIO, |
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.filter_frame = filter_frame, |
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}, |
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{ NULL } |
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}; |
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static const AVFilterPad avfilter_af_hdcd_outputs[] = { |
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{ |
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.name = "default", |
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.type = AVMEDIA_TYPE_AUDIO, |
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}, |
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{ NULL } |
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}; |
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AVFilter ff_af_hdcd = { |
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.name = "hdcd", |
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.description = NULL_IF_CONFIG_SMALL("Apply High Definition Compatible Digital (HDCD) decoding."), |
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.priv_size = sizeof(HDCDContext), |
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.priv_class = &hdcd_class, |
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.init = init, |
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.uninit = uninit, |
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.query_formats = query_formats, |
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.inputs = avfilter_af_hdcd_inputs, |
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.outputs = avfilter_af_hdcd_outputs, |
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}; |
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