lavfi: add flite audio source
This commit is contained in:
Stefano Sabatini
parent
fd2b6c1e4b
commit
66a5201819
@ -37,6 +37,7 @@ version next:
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- caca output device using libcaca
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- alphaextract and alphamerge filters
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- concat filter
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- flite filter
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version 0.11:
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5
configure
vendored
5
configure
vendored
@ -180,6 +180,7 @@ External library support:
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and libraw1394 [no]
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--enable-libfaac enable AAC encoding via libfaac [no]
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--enable-libfdk-aac enable AAC encoding via libfdk-aac [no]
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--enable-libflite enable flite (voice synthesis) support via libflite [no]
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--enable-libfreetype enable libfreetype [no]
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--enable-libgsm enable GSM de/encoding via libgsm [no]
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--enable-libiec61883 enable iec61883 via libiec61883 [no]
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@ -1074,6 +1075,7 @@ CONFIG_LIST="
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libdc1394
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libfaac
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libfdk_aac
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libflite
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libfreetype
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libgsm
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libiec61883
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@ -1787,6 +1789,7 @@ cropdetect_filter_deps="gpl"
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delogo_filter_deps="gpl"
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deshake_filter_deps="avcodec"
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drawtext_filter_deps="libfreetype"
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flite_filter_deps="libflite"
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frei0r_filter_deps="frei0r dlopen"
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frei0r_filter_extralibs='$ldl'
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frei0r_src_filter_deps="frei0r dlopen"
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@ -3390,6 +3393,8 @@ enabled libcelt && require libcelt celt/celt.h celt_decode -lcelt0 &&
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enabled libcaca && require_pkg_config caca caca.h caca_create_canvas
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enabled libfaac && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
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enabled libfdk_aac && require libfdk_aac fdk-aac/aacenc_lib.h aacEncOpen -lfdk-aac
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flite_libs="-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"
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enabled libflite && require2 libflite "flite/flite.h" flite_init $flite_libs
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enabled libfreetype && require_pkg_config freetype2 "ft2build.h freetype/freetype.h" FT_Init_FreeType
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enabled libgsm && require libgsm gsm/gsm.h gsm_create -lgsm
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enabled libilbc && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
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@ -1026,6 +1026,65 @@ Channel layout of the audio data, in the form that can be accepted by
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All the parameters need to be explicitly defined.
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@section flite
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Synthesize a voice utterance using the libflite library.
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To enable compilation of this filter you need to configure FFmpeg with
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@code{--enable-libflite}.
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The source accepts parameters as a list of @var{key}=@var{value} pairs,
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separated by ":".
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The description of the accepted parameters follows.
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@table @option
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@item list_voices
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If set to 1, list the names of the available voices and exit
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immediately. Default value is 0.
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@item nb_samples, n
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Set the maximum number of samples per frame. Default value is 512.
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@item textfile
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Set the filename containing the text to speak.
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@item text
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Set the text to speak.
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@item voice, v
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Set the voice to use for the speech synthesis. Default value is
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@code{kal}. See also the @var{list_voices} option.
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@end table
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@section Examples
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@itemize
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@item
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Read from file @file{speech.txt}, and synthetize the text using the
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standard flite voice:
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@example
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flite=textfile=speech.txt
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@end example
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@item
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Read the specified text selecting the @code{slt} voice:
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@example
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flite=text='So fare thee well, poor devil of a Sub-Sub, whose commentator I am':voice=slt
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@end example
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@item
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Make @file{ffplay} speech the specified text, using @code{flite} and
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the @code{lavfi} device:
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@example
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ffplay -f lavfi flite='No more be grieved for which that thou hast done.'
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@end example
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@end itemize
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For more information about libflite, check:
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@url{http://www.speech.cs.cmu.edu/flite/}
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@c man end AUDIO SOURCES
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@chapter Audio Sinks
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@ -70,6 +70,7 @@ OBJS-$(CONFIG_VOLUME_FILTER) += af_volume.o
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OBJS-$(CONFIG_AEVALSRC_FILTER) += asrc_aevalsrc.o
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OBJS-$(CONFIG_ANULLSRC_FILTER) += asrc_anullsrc.o
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OBJS-$(CONFIG_FLITE_FILTER) += asrc_flite.o
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OBJS-$(CONFIG_ABUFFERSINK_FILTER) += sink_buffer.o
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OBJS-$(CONFIG_ANULLSINK_FILTER) += asink_anullsink.o
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@ -59,6 +59,7 @@ void avfilter_register_all(void)
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REGISTER_FILTER (AEVALSRC, aevalsrc, asrc);
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REGISTER_FILTER (ANULLSRC, anullsrc, asrc);
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REGISTER_FILTER (FLITE, flite, asrc);
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REGISTER_FILTER (ABUFFERSINK, abuffersink, asink);
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REGISTER_FILTER (ANULLSINK, anullsink, asink);
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274
libavfilter/asrc_flite.c
Normal file
274
libavfilter/asrc_flite.c
Normal file
@ -0,0 +1,274 @@
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/*
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* Copyright (c) 2012 Stefano Sabatini
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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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* flite voice synth source
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*/
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#include <flite/flite.h>
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#include "libavutil/audioconvert.h"
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#include "libavutil/file.h"
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#include "libavutil/opt.h"
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#include "avfilter.h"
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#include "audio.h"
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#include "formats.h"
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#include "internal.h"
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typedef struct {
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const AVClass *class;
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char *voice_str;
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char *textfile;
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char *text;
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cst_wave *wave;
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int16_t *wave_samples;
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int wave_nb_samples;
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int list_voices;
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cst_voice *voice;
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int64_t pts;
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int frame_nb_samples; ///< number of samples per frame
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} FliteContext;
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#define OFFSET(x) offsetof(FliteContext, x)
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static const AVOption flite_options[] = {
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{ "list_voices", "list voices and exit", OFFSET(list_voices), AV_OPT_TYPE_INT, {.dbl=0}, 0, 1 },
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{ "nb_samples", "set number of samples per frame", OFFSET(frame_nb_samples), AV_OPT_TYPE_INT, {.dbl=512}, 0, INT_MAX },
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{ "n", "set number of samples per frame", OFFSET(frame_nb_samples), AV_OPT_TYPE_INT, {.dbl=512}, 0, INT_MAX },
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{ "text", "set text to speak", OFFSET(text), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX },
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{ "textfile", "set filename of the text to speak", OFFSET(textfile), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX },
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{ "v", "set voice", OFFSET(voice_str), AV_OPT_TYPE_STRING, {.str="kal"}, CHAR_MIN, CHAR_MAX },
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{ "voice", "set voice", OFFSET(voice_str), AV_OPT_TYPE_STRING, {.str="kal"}, CHAR_MIN, CHAR_MAX },
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{ NULL }
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};
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AVFILTER_DEFINE_CLASS(flite);
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static volatile int flite_inited = 0;
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/* declare functions for all the supported voices */
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#define DECLARE_REGISTER_VOICE_FN(name) cst_voice *register_cmu_us_## name(const char *)
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DECLARE_REGISTER_VOICE_FN(awb);
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DECLARE_REGISTER_VOICE_FN(kal);
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DECLARE_REGISTER_VOICE_FN(kal16);
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DECLARE_REGISTER_VOICE_FN(rms);
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DECLARE_REGISTER_VOICE_FN(slt);
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struct voice_entry {
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const char *name;
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cst_voice * (*register_fn)(const char *);
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} voice_entry;
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static struct voice_entry voice_entries[] = {
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{ "awb", register_cmu_us_awb },
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{ "kal", register_cmu_us_kal },
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{ "kal16", register_cmu_us_kal16 },
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{ "rms", register_cmu_us_rms },
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{ "slt", register_cmu_us_slt },
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};
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static void list_voices(void *log_ctx, const char *sep)
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{
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int i, n = FF_ARRAY_ELEMS(voice_entries);
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for (i = 0; i < n; i++)
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av_log(log_ctx, AV_LOG_INFO, "%s%s",
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voice_entries[i].name, i < (n-1) ? sep : "\n");
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}
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static int select_voice(cst_voice **voice, const char *voice_name, void *log_ctx)
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{
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int i;
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for (i = 0; i < FF_ARRAY_ELEMS(voice_entries); i++) {
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struct voice_entry *entry = &voice_entries[i];
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if (!strcmp(entry->name, voice_name)) {
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*voice = entry->register_fn(NULL);
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if (!*voice) {
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av_log(log_ctx, AV_LOG_ERROR,
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"Could not register voice '%s'\n", voice_name);
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return AVERROR_UNKNOWN;
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}
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return 0;
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}
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}
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av_log(log_ctx, AV_LOG_ERROR, "Could not find voice '%s'\n", voice_name);
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av_log(log_ctx, AV_LOG_INFO, "Choose between the voices: ");
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list_voices(log_ctx, ", ");
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return AVERROR(EINVAL);
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}
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static av_cold int init(AVFilterContext *ctx, const char *args)
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{
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FliteContext *flite = ctx->priv;
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int ret = 0;
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flite->class = &flite_class;
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av_opt_set_defaults(flite);
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if ((ret = av_set_options_string(flite, args, "=", ":")) < 0) {
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av_log(ctx, AV_LOG_ERROR, "Error parsing options string: '%s'\n", args);
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return ret;
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}
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if (flite->list_voices) {
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list_voices(ctx, "\n");
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return AVERROR_EXIT;
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}
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if (!flite_inited) {
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if (flite_init() < 0) {
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av_log(ctx, AV_LOG_ERROR, "flite initialization failed\n");
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return AVERROR_UNKNOWN;
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}
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flite_inited++;
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}
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if ((ret = select_voice(&flite->voice, flite->voice_str, ctx)) < 0)
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return ret;
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if (flite->textfile && flite->text) {
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av_log(ctx, AV_LOG_ERROR,
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"Both text and textfile options set: only one must be specified\n");
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return AVERROR(EINVAL);
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}
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if (flite->textfile) {
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uint8_t *textbuf;
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size_t textbuf_size;
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if ((ret = av_file_map(flite->textfile, &textbuf, &textbuf_size, 0, ctx)) < 0) {
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av_log(ctx, AV_LOG_ERROR,
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"The text file '%s' could not be read: %s\n",
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flite->textfile, av_err2str(ret));
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return ret;
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}
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if (!(flite->text = av_malloc(textbuf_size+1)))
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return AVERROR(ENOMEM);
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memcpy(flite->text, textbuf, textbuf_size);
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flite->text[textbuf_size] = 0;
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av_file_unmap(textbuf, textbuf_size);
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}
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if (!flite->text) {
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av_log(ctx, AV_LOG_ERROR,
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"No speech text specified, specify the 'text' or 'textfile' option\n");
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return AVERROR(EINVAL);
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}
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/* synth all the file data in block */
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flite->wave = flite_text_to_wave(flite->text, flite->voice);
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flite->wave_samples = flite->wave->samples;
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flite->wave_nb_samples = flite->wave->num_samples;
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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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FliteContext *flite = ctx->priv;
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av_opt_free(flite);
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delete_voice(flite->voice);
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flite->voice = NULL;
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delete_wave(flite->wave);
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flite->wave = NULL;
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}
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static int query_formats(AVFilterContext *ctx)
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{
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FliteContext *flite = ctx->priv;
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AVFilterChannelLayouts *chlayouts = NULL;
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int64_t chlayout = av_get_default_channel_layout(flite->wave->num_channels);
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AVFilterFormats *sample_formats = NULL;
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AVFilterFormats *sample_rates = NULL;
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ff_add_channel_layout(&chlayouts, chlayout);
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ff_set_common_channel_layouts(ctx, chlayouts);
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ff_add_format(&sample_formats, AV_SAMPLE_FMT_S16);
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ff_set_common_formats(ctx, sample_formats);
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ff_add_format(&sample_rates, flite->wave->sample_rate);
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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 int config_props(AVFilterLink *outlink)
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{
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AVFilterContext *ctx = outlink->src;
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FliteContext *flite = ctx->priv;
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outlink->sample_rate = flite->wave->sample_rate;
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outlink->time_base = (AVRational){1, flite->wave->sample_rate};
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av_log(ctx, AV_LOG_VERBOSE, "voice:%s fmt:%s sample_rate:%d\n",
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flite->voice_str,
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av_get_sample_fmt_name(outlink->format), outlink->sample_rate);
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return 0;
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}
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static int request_frame(AVFilterLink *outlink)
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{
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AVFilterBufferRef *samplesref;
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FliteContext *flite = outlink->src->priv;
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int nb_samples = FFMIN(flite->wave_nb_samples, flite->frame_nb_samples);
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if (!nb_samples)
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return AVERROR_EOF;
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samplesref = ff_get_audio_buffer(outlink, AV_PERM_WRITE, nb_samples);
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if (!samplesref)
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return AVERROR(ENOMEM);
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memcpy(samplesref->data[0], flite->wave_samples,
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nb_samples * flite->wave->num_channels * 2);
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samplesref->pts = flite->pts;
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samplesref->pos = -1;
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samplesref->audio->sample_rate = flite->wave->sample_rate;
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flite->pts += nb_samples;
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flite->wave_samples += nb_samples * flite->wave->num_channels;
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flite->wave_nb_samples -= nb_samples;
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return ff_filter_samples(outlink, samplesref);
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}
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AVFilter avfilter_asrc_flite = {
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.name = "flite",
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.description = NULL_IF_CONFIG_SMALL("Synthesize voice from text using libflite."),
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.query_formats = query_formats,
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.init = init,
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.uninit = uninit,
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.priv_size = sizeof(FliteContext),
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.inputs = (const AVFilterPad[]) {{ .name = NULL}},
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.outputs = (const AVFilterPad[]) {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_AUDIO,
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.config_props = config_props,
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.request_frame = request_frame,
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},
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{ .name = NULL }
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},
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};
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@ -29,7 +29,7 @@
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#include "libavutil/avutil.h"
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#define LIBAVFILTER_VERSION_MAJOR 3
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#define LIBAVFILTER_VERSION_MINOR 3
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#define LIBAVFILTER_VERSION_MINOR 4
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#define LIBAVFILTER_VERSION_MICRO 100
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#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
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