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Thu, 26 Mar 2020 01:05:23 -0700 (PDT) Received: from localhost.localdomain ([223.176.51.170]) by smtp.gmail.com with ESMTPSA id d26sm1035011pfo.37.2020.03.26.01.05.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 26 Mar 2020 01:05:22 -0700 (PDT) From: Ashutosh Pradhan To: ffmpeg-devel@ffmpeg.org Date: Thu, 26 Mar 2020 13:35:11 +0530 Message-Id: <20200326080511.32555-1-ashutoshp012345@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: References: Subject: [FFmpeg-devel] [PATCHv2][GSoC]audio filter-use cellular automata to generate tones X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: FFmpeg development discussions and patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: FFmpeg development discussions and patches Cc: ashutoshp012345@gmail.com MIME-Version: 1.0 Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Use cellular automata and fluidsynth sequencer to generate tones in major pentatonic scale diff --git a/Changelog b/Changelog index d1572553a5..5ddd2484b0 100644 --- a/Changelog +++ b/Changelog @@ -48,6 +48,7 @@ version : - AMQP 0-9-1 protocol (RabbitMQ) - Vulkan support - avgblur_vulkan, overlay_vulkan, scale_vulkan and chromaber_vulkan filters +- atone filter version 4.2: diff --git a/configure b/configure index 6ceb0c7af4..2ec7e377f3 100755 --- a/configure +++ b/configure @@ -233,6 +233,7 @@ External library support: and libraw1394 [no] --enable-libfdk-aac enable AAC de/encoding via libfdk-aac [no] --enable-libflite enable flite (voice synthesis) support via libflite [no] + --enable-libfluidsynth enable libfluidsynth support for fluidsynth [no] --enable-libfontconfig enable libfontconfig, useful for drawtext filter [no] --enable-libfreetype enable libfreetype, needed for drawtext filter [no] --enable-libfribidi enable libfribidi, improves drawtext filter [no] @@ -1770,6 +1771,7 @@ EXTERNAL_LIBRARY_LIST=" libdc1394 libdrm libflite + libfluidsynth libfontconfig libfreetype libfribidi @@ -3465,6 +3467,7 @@ asr_filter_deps="pocketsphinx" ass_filter_deps="libass" atempo_filter_deps="avcodec" atempo_filter_select="rdft" +atone_filter_deps="libfluidsynth" avgblur_opencl_filter_deps="opencl" avgblur_vulkan_filter_deps="vulkan libglslang" azmq_filter_deps="libzmq" @@ -6270,6 +6273,7 @@ enabled libfdk_aac && { check_pkg_config libfdk_aac fdk-aac "fdk-aac/aace warn "using libfdk without pkg-config"; } } flite_extralibs="-lflite_cmu_time_awb -lflite_cmu_us_awb -lflite_cmu_us_kal -lflite_cmu_us_kal16 -lflite_cmu_us_rms -lflite_cmu_us_slt -lflite_usenglish -lflite_cmulex -lflite" enabled libflite && require libflite "flite/flite.h" flite_init $flite_extralibs +enabled libfluidsynth && require_pkg_config libfluidsynth fluidsynth "fluidsynth.h" fluid_log enabled fontconfig && enable libfontconfig enabled libfontconfig && require_pkg_config libfontconfig fontconfig "fontconfig/fontconfig.h" FcInit enabled libfreetype && require_pkg_config libfreetype freetype2 "ft2build.h FT_FREETYPE_H" FT_Init_FreeType diff --git a/doc/filters.texi b/doc/filters.texi index 328e984e92..193dcaf8e9 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -6050,6 +6050,60 @@ anoisesrc=d=60:c=pink:r=44100:a=0.5 @end example @end itemize +@section atone + +Generate legato tones using cellular automata. +To compile filter configure ffmpeg with @code{--enable-libfluidsynth} + +The filter accepts the following options: + +@table @option +@item sample_rate, r +Specify the sample rate. Default value is 44100 Hz. + +@item sfont +Specify the location of soundfont file. Default value is +"/usr/share/sounds/sf2/FluidR3_GM.sf2"(for linux). + +@item duration, d +Specify the duration of the generated audio stream. Not specifying this option +results in playing tones for infinite length. + +@item velocity, v +Specify the velocity of key press. Default value is 80. + +@item MIDI_channel +Specify the MIDI channel number between(0 to 16) to play tones. Default is 0. + +@item tone_change_interval, t +Specify the time interval between successive tones in seconds. Default is 0.2s. + +@item rule +Specify the rule between 0 to 255 to get the rule set. Default is 30. + +@item width +Specify the width of the cells array. Default is 64. + +@item tempo +Specify the beats per minute. Default is 120. + +@item samples_per_frame +Set the number of samples per each output frame. Default is 1024. +@end table + +@subsection Examples + +@itemize + +@item +Generate 10 seconds of random tones, with a key velocity of 100, midi channel 1 +and an tone change interval of 0.1s: +@example +atone=d=10:MIDI_channel=1:v=100:t=0.1:sfont="example.sf2":rule=193 +atone=duration=10:MIDI_channel=1:velocity=100:tone_change_interval=0.1:sfont="example.sf2":rule=193 +@end example +@end itemize + @section hilbert Generate odd-tap Hilbert transform FIR coefficients. diff --git a/libavfilter/Makefile b/libavfilter/Makefile index 750412da6b..b1f0c4be35 100644 --- a/libavfilter/Makefile +++ b/libavfilter/Makefile @@ -151,6 +151,7 @@ OBJS-$(CONFIG_FLITE_FILTER) += asrc_flite.o OBJS-$(CONFIG_HILBERT_FILTER) += asrc_hilbert.o OBJS-$(CONFIG_SINC_FILTER) += asrc_sinc.o OBJS-$(CONFIG_SINE_FILTER) += asrc_sine.o +OBJS-$(CONFIG_ATONE_FILTER) += asrc_atone.o OBJS-$(CONFIG_ANULLSINK_FILTER) += asink_anullsink.o diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c index 501e5d041b..4d3efc7e15 100644 --- a/libavfilter/allfilters.c +++ b/libavfilter/allfilters.c @@ -145,6 +145,7 @@ extern AVFilter ff_asrc_flite; extern AVFilter ff_asrc_hilbert; extern AVFilter ff_asrc_sinc; extern AVFilter ff_asrc_sine; +extern AVFilter ff_asrc_atone; extern AVFilter ff_asink_anullsink; diff --git a/libavfilter/asrc_atone.c b/libavfilter/asrc_atone.c new file mode 100644 index 0000000000..79643a15ec --- /dev/null +++ b/libavfilter/asrc_atone.c @@ -0,0 +1,365 @@ +/* + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public License + * as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with FFmpeg; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ +#include +#include +#include +#include +#include +#include + +#include "libavutil/avassert.h" +#include "libavutil/channel_layout.h" +#include "libavutil/eval.h" +#include "libavutil/opt.h" +#include "libavutil/lfg.h" +#include "libavutil/random_seed.h" +#include "audio.h" +#include "avfilter.h" +#include "internal.h" + +typedef struct AtoneContext +{ + const AVClass* class; + int64_t duration; + int nb_samples; + int sample_rate; + int64_t pts; + int infinite; + + fluid_settings_t* settings; + fluid_synth_t* synth; + fluid_sequencer_t *sequencer; + short synth_destination, client_destination; + unsigned int beat_dur; + unsigned int tempo; + unsigned int time_marker; + unsigned int pattern_size; + char* sfont; ///< soundfont file + int sfont_id; + int midi_chan; ///< midi channel number + int velocity; ///< velocity of key + double changerate; ///< get the time interval of changing tones + int notes[5]; + int *cells; + int *nextgen; + int rule; ///< Rule for changing value in cell(taking 3 cells at time hence 2^8 rules possible) + int width; ///< width of the cell array + int ruleset[8]; ///< taking 3 cells at a time + int framecount; +}AtoneContext; + +#define CONTEXT AtoneContext +#define FLAGS AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM + +#define OPT_GENERIC(name, field, def, min, max, descr, type, deffield, ...) \ + { name, descr, offsetof(CONTEXT, field), AV_OPT_TYPE_ ## type, \ + { .deffield = def }, min, max, FLAGS, __VA_ARGS__ } + +#define OPT_INT(name, field, def, min, max, descr, ...) \ + OPT_GENERIC(name, field, def, min, max, descr, INT, i64, __VA_ARGS__) + +#define OPT_DBL(name, field, def, min, max, descr, ...) \ + OPT_GENERIC(name, field, def, min, max, descr, DOUBLE, dbl, __VA_ARGS__) + +#define OPT_DUR(name, field, def, min, max, descr, ...) \ + OPT_GENERIC(name, field, def, min, max, descr, DURATION, str, __VA_ARGS__) + +#define OPT_STR(name, field, def, min, max, descr, ...) \ + OPT_GENERIC(name, field, def, min, max, descr, STRING, str, __VA_ARGS__) + +static const AVOption atone_options[] = { + OPT_INT("velocity", velocity, 127, 0, 127, "set the velocity of key press",), + OPT_INT("v", velocity, 127, 0, 127, "set the velocity of key press",), + OPT_INT("sample_rate", sample_rate, 44100, 1, INT_MAX, "set the sample rate",), + OPT_INT("r", sample_rate, 44100, 1, INT_MAX, "set the sample rate",), + OPT_DUR("duration", duration, 0, 0, INT64_MAX, "set the audio duration",), + OPT_DUR("d", duration, 0, 0, INT64_MAX, "set the audio duration",), + OPT_STR("sfont", sfont, "/usr/share/sounds/sf2/FluidR3_GM.sf2", 0, 0, "set the soundfont file",), + OPT_INT("samples_per_frame", nb_samples, 1024, 0, INT_MAX, "set the number of samples per frame",), + OPT_INT("MIDI_channel", midi_chan, 0, 0, 16, "set the MIDI Channel",), + OPT_DBL("tone_change_interval",changerate, 0.2, 0, DBL_MAX, "set the time to get next generation cells in seconds",), + OPT_DBL("t", changerate, 0.2, 0, DBL_MAX, "set the time to get next generation cells in seconds",), + OPT_INT("rule", rule, 30, 0, 255, "set the rule for changing value in cell",), + OPT_INT("width", width, 64, 0, INT_MAX, "set the width of the cell array",), + OPT_INT("tempo", tempo, 120, 0, INT_MAX, "set the beats per minute",), + {NULL} +}; + +AVFILTER_DEFINE_CLASS(atone); + +static void sequencer_callback(unsigned int time, fluid_event_t *event, fluid_sequencer_t *seq, void* data); + +static av_cold int init(AVFilterContext *ctx) +{ + AtoneContext *s = ctx->priv; + int n = s->rule; + /*Initialise the fluidsynth settings object followed by synthesizer*/ + s->settings = new_fluid_settings(); + if (s->settings == NULL){ + av_log(s, AV_LOG_ERROR, "Failed to create the fluidsynth settings"); + return AVERROR_EXTERNAL; + } + + s->synth = new_fluid_synth(s->settings); + if (s->synth == NULL){ + av_log(s, AV_LOG_ERROR, "Failed to create the fluidsynth synth"); + return AVERROR_EXTERNAL; + } + + s->sfont_id = fluid_synth_sfload(s->synth, s->sfont, 1); + if(s->sfont_id == FLUID_FAILED){ + av_log(s, AV_LOG_ERROR, "Loading the Soundfont Failed"); + return AVERROR_EXTERNAL; + } + if (!(s->cells = av_malloc(sizeof(int)*(s->width)))) + return AVERROR(ENOMEM); + + if (!(s->nextgen = av_malloc(sizeof(int)*(s->width)))) + return AVERROR(ENOMEM); + s->framecount=0; + s->sequencer = new_fluid_sequencer2(0); + /* register the synth with the sequencer */ + s->synth_destination = fluid_sequencer_register_fluidsynth(s->sequencer, s->synth); + /* register the client name and callback */ + s->client_destination = fluid_sequencer_register_client(s->sequencer, "atone", sequencer_callback, s); + s->time_marker = fluid_sequencer_get_tick(s->sequencer); + /*get change interval in frames/sec*/ + s->changerate= s->changerate*s->sample_rate/s->nb_samples; + if (s->changerate<1.0) + s->changerate = 1.0; + /*get the beat duration in TICKS*/ + s->beat_dur = 60000/s->tempo; + s->pattern_size = 5; + for (int i = 0; i < s->width; i++) + s->cells[i] = 0; + s->cells[s->width/2] = 1; + for (int i = 0; i < s->pattern_size; i++) + s->notes[i] = 0; + for (int i = 0; i<8; i++){ + s->ruleset[i] = n%2; + n = n>>1; + } + return 0; +} + +static av_cold void uninit(AVFilterContext *ctx) +{ + AtoneContext *s = ctx->priv; + + delete_fluid_sequencer(s->sequencer); + delete_fluid_synth(s->synth); + delete_fluid_settings(s->settings); + av_freep(&s->cells); + av_freep(&s->nextgen); +} + +static av_cold int config_props(AVFilterLink *outlink) +{ + AtoneContext *s = outlink->src->priv; + + if (s->duration == 0) + s->infinite = 1; + s->duration = av_rescale(s->duration, s->sample_rate, AV_TIME_BASE); + if (s->framecount == INT_MAX) + s->framecount = 0; + return 0; +} + +/* schedule a note on message */ +static void schedule_noteon(int chan, short key, unsigned int ticks, AtoneContext* s) +{ + fluid_event_t *ev = new_fluid_event(); + fluid_event_set_source(ev, -1); + fluid_event_set_dest(ev,s->synth_destination); + fluid_event_noteon(ev, chan, key, s->velocity); + fluid_sequencer_send_at(s->sequencer, ev, ticks, 1); + delete_fluid_event(ev); +} +/* schedule a note off message */ +static void schedule_noteoff(int chan, short key, unsigned int ticks, AtoneContext* s) +{ + fluid_event_t *ev = new_fluid_event(); + fluid_event_set_source(ev, -1); + fluid_event_set_dest(ev, s->synth_destination); + fluid_event_noteoff(ev, chan, key); + fluid_sequencer_send_at(s->sequencer, ev, ticks, 1); + delete_fluid_event(ev); +} +/* schedule a timer event to trigger the callback */ +static void schedule_timer_event(AtoneContext* s) +{ + fluid_event_t *ev = new_fluid_event(); + fluid_event_set_source(ev, -1); + fluid_event_set_dest(ev, s->client_destination); + fluid_event_timer(ev, NULL); + fluid_sequencer_send_at(s->sequencer, ev, s->time_marker, 1); + delete_fluid_event(ev); +} + +static void multiple_notes(int note_time, int start, int length, int* p_scale, int on, AtoneContext* s){ + if (on == 1){ + for (int i = start; i < length; i++) + if (s->notes[i] == 1) + schedule_noteon(s->midi_chan, p_scale[i], note_time, s); + } + else + { + for (int i = start; i < length; i++) + if (s->notes[i] == 1) + schedule_noteoff(s->midi_chan, p_scale[i], note_time, s); + } + +} +static void schedule_pattern(AtoneContext* s) +{ + enum on{OFF, ON}; + int note_time, note_duration; + int p_scale[] = {60, 62, 65, 67, 69}; //major pentatonic scale + note_time = s->time_marker; + + if (s->notes[s->pattern_size/2] == 1){ + note_duration = s->beat_dur; + multiple_notes(note_time, 0, s->pattern_size, p_scale, ON, s); + note_time += note_duration; + multiple_notes(note_time, 0, s->pattern_size, p_scale, OFF, s); + } + else{ + note_duration = s->beat_dur/2; + multiple_notes(note_time, 0, s->pattern_size/2, p_scale, ON, s); + note_time += note_duration; + multiple_notes(note_time, s->pattern_size/2, s->pattern_size, p_scale, ON, s); + note_time += note_duration; + multiple_notes(note_time, 0, s->pattern_size, p_scale, OFF, s); + } + s->time_marker += s->beat_dur; +} +static void sequencer_callback(unsigned int time, fluid_event_t *event, fluid_sequencer_t *seq, void* data) +{ + + schedule_timer_event(data); + schedule_pattern(data); +} + +/* +Generate keys using cellular automata. Reference taken from http://tones.wolfram.com/about/how-it-works +to generate the cells. Rule 30(default) gives random numbers. Here middle part(+-2) of the cell generation +is taken to get the keys. The keys generated are played in the major pentatonic scale, inspired by +https://twitter.com/teropa/status/880668931568132097. +*/ +static void generate(AtoneContext* s){ + for (int i=0; i< s->width; i++){ + int c=0; + for (int j = 0; j < 3; j++){ + c+= s->cells[(i+j-1)%s->width]<<(j); + } + s->nextgen[i] = s->ruleset[c]; + } + memcpy(s->cells, s->nextgen, s->width*sizeof(int)); + memcpy(s->notes, &s->cells[s->width/2-s->pattern_size/2], s->pattern_size*sizeof(int)); +} + +static int request_frame(AVFilterLink *outlink) +{ + AVFilterContext *ctx = outlink->src; + AtoneContext *s = ctx->priv; + AVFrame *frame; + int nb_samples; + if (!s->infinite && s->duration <= 0) { + return AVERROR_EOF; + } else if (!s->infinite && s->duration < s->nb_samples) { + nb_samples = s->duration; + } else { + nb_samples = s->nb_samples; + } + + if (!(frame = ff_get_audio_buffer(outlink, nb_samples))) + return AVERROR(ENOMEM); + + if (s->framecount%((int)s->changerate) == 0){ + generate(s); + schedule_pattern(s); + schedule_timer_event(s); + } + + fluid_synth_write_float(s->synth, nb_samples, frame->data[0], 0, 2, frame->data[0], 1, 2); + + if (!s->infinite) + s->duration -= nb_samples; + + s->framecount++; + frame->pts = s->pts; + s->pts += nb_samples; + return ff_filter_frame(outlink, frame); +} + +static av_cold int query_formats(AVFilterContext *ctx) +{ + AtoneContext *s = ctx->priv; + static const int64_t chlayouts[] = { AV_CH_LAYOUT_STEREO, -1 }; + int sample_rates[] = { s->sample_rate, -1 }; + static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_NONE}; + AVFilterFormats *formats; + AVFilterChannelLayouts *layouts; + int ret; + + formats = ff_make_format_list(sample_fmts); + if (!formats) + return AVERROR(ENOMEM); + ret = ff_set_common_formats (ctx, formats); + if (ret < 0) + return ret; + + layouts = avfilter_make_format64_list(chlayouts); + if (!layouts) + return AVERROR(ENOMEM); + ret = ff_set_common_channel_layouts(ctx, layouts); + if (ret < 0) + return ret; + + formats = ff_make_format_list(sample_rates); + if (!formats) + return AVERROR(ENOMEM); + return ff_set_common_samplerates(ctx, formats); +} + + +static const AVFilterPad atone_outputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_AUDIO, + .request_frame = request_frame, + .config_props = config_props, + }, + { NULL } +}; + +AVFilter ff_asrc_atone = { + .name = "atone", + .description = NULL_IF_CONFIG_SMALL("Generate tones using cellular automata."), + .query_formats = query_formats, + .init = init, + .uninit = uninit, + .priv_size = sizeof(AtoneContext), + .inputs = NULL, + .outputs = atone_outputs, + .priv_class = &atone_class, +}; + + + + diff --git a/libavfilter/version.h b/libavfilter/version.h index 7b41018be7..4c4e8afe2d 100644 --- a/libavfilter/version.h +++ b/libavfilter/version.h @@ -30,7 +30,7 @@ #include "libavutil/version.h" #define LIBAVFILTER_VERSION_MAJOR 7 -#define LIBAVFILTER_VERSION_MINOR 77 +#define LIBAVFILTER_VERSION_MINOR 78 #define LIBAVFILTER_VERSION_MICRO 100