[FFmpeg-cvslog] lavfi: add flite audio source
Stefano Sabatini
git at videolan.org
Sat Jul 28 11:16:49 CEST 2012
ffmpeg | branch: master | Stefano Sabatini <stefasab at gmail.com> | Sun Aug 21 02:29:33 2011 +0200| [66a52018194861540d11e5b0815719516479d776] | committer: Stefano Sabatini
lavfi: add flite audio source
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=66a52018194861540d11e5b0815719516479d776
---
Changelog | 1 +
configure | 5 +
doc/filters.texi | 59 ++++++++++
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/asrc_flite.c | 274 ++++++++++++++++++++++++++++++++++++++++++++++
libavfilter/version.h | 2 +-
7 files changed, 342 insertions(+), 1 deletion(-)
diff --git a/Changelog b/Changelog
index 04af936..79a8f4c 100644
--- a/Changelog
+++ b/Changelog
@@ -37,6 +37,7 @@ version next:
- caca output device using libcaca
- alphaextract and alphamerge filters
- concat filter
+- flite filter
version 0.11:
diff --git a/configure b/configure
index 818daa6..0b27b6b 100755
--- a/configure
+++ b/configure
@@ -180,6 +180,7 @@ External library support:
and libraw1394 [no]
--enable-libfaac enable AAC encoding via libfaac [no]
--enable-libfdk-aac enable AAC encoding via libfdk-aac [no]
+ --enable-libflite enable flite (voice synthesis) support via libflite [no]
--enable-libfreetype enable libfreetype [no]
--enable-libgsm enable GSM de/encoding via libgsm [no]
--enable-libiec61883 enable iec61883 via libiec61883 [no]
@@ -1074,6 +1075,7 @@ CONFIG_LIST="
libdc1394
libfaac
libfdk_aac
+ libflite
libfreetype
libgsm
libiec61883
@@ -1787,6 +1789,7 @@ cropdetect_filter_deps="gpl"
delogo_filter_deps="gpl"
deshake_filter_deps="avcodec"
drawtext_filter_deps="libfreetype"
+flite_filter_deps="libflite"
frei0r_filter_deps="frei0r dlopen"
frei0r_filter_extralibs='$ldl'
frei0r_src_filter_deps="frei0r dlopen"
@@ -3390,6 +3393,8 @@ enabled libcelt && require libcelt celt/celt.h celt_decode -lcelt0 &&
enabled libcaca && require_pkg_config caca caca.h caca_create_canvas
enabled libfaac && require2 libfaac "stdint.h faac.h" faacEncGetVersion -lfaac
enabled libfdk_aac && require libfdk_aac fdk-aac/aacenc_lib.h aacEncOpen -lfdk-aac
+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"
+enabled libflite && require2 libflite "flite/flite.h" flite_init $flite_libs
enabled libfreetype && require_pkg_config freetype2 "ft2build.h freetype/freetype.h" FT_Init_FreeType
enabled libgsm && require libgsm gsm/gsm.h gsm_create -lgsm
enabled libilbc && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
diff --git a/doc/filters.texi b/doc/filters.texi
index c93314b..37d9e40 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -1026,6 +1026,65 @@ Channel layout of the audio data, in the form that can be accepted by
All the parameters need to be explicitly defined.
+ at section flite
+
+Synthesize a voice utterance using the libflite library.
+
+To enable compilation of this filter you need to configure FFmpeg with
+ at code{--enable-libflite}.
+
+The source accepts parameters as a list of @var{key}=@var{value} pairs,
+separated by ":".
+
+The description of the accepted parameters follows.
+
+ at table @option
+
+ at item list_voices
+If set to 1, list the names of the available voices and exit
+immediately. Default value is 0.
+
+ at item nb_samples, n
+Set the maximum number of samples per frame. Default value is 512.
+
+ at item textfile
+Set the filename containing the text to speak.
+
+ at item text
+Set the text to speak.
+
+ at item voice, v
+Set the voice to use for the speech synthesis. Default value is
+ at code{kal}. See also the @var{list_voices} option.
+ at end table
+
+ at section Examples
+
+ at itemize
+ at item
+Read from file @file{speech.txt}, and synthetize the text using the
+standard flite voice:
+ at example
+flite=textfile=speech.txt
+ at end example
+
+ at item
+Read the specified text selecting the @code{slt} voice:
+ at example
+flite=text='So fare thee well, poor devil of a Sub-Sub, whose commentator I am':voice=slt
+ at end example
+
+ at item
+Make @file{ffplay} speech the specified text, using @code{flite} and
+the @code{lavfi} device:
+ at example
+ffplay -f lavfi flite='No more be grieved for which that thou hast done.'
+ at end example
+ at end itemize
+
+For more information about libflite, check:
+ at url{http://www.speech.cs.cmu.edu/flite/}
+
@c man end AUDIO SOURCES
@chapter Audio Sinks
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index d629948..2ff62f7 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -70,6 +70,7 @@ OBJS-$(CONFIG_VOLUME_FILTER) += af_volume.o
OBJS-$(CONFIG_AEVALSRC_FILTER) += asrc_aevalsrc.o
OBJS-$(CONFIG_ANULLSRC_FILTER) += asrc_anullsrc.o
+OBJS-$(CONFIG_FLITE_FILTER) += asrc_flite.o
OBJS-$(CONFIG_ABUFFERSINK_FILTER) += sink_buffer.o
OBJS-$(CONFIG_ANULLSINK_FILTER) += asink_anullsink.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index d79218e..403383d 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -59,6 +59,7 @@ void avfilter_register_all(void)
REGISTER_FILTER (AEVALSRC, aevalsrc, asrc);
REGISTER_FILTER (ANULLSRC, anullsrc, asrc);
+ REGISTER_FILTER (FLITE, flite, asrc);
REGISTER_FILTER (ABUFFERSINK, abuffersink, asink);
REGISTER_FILTER (ANULLSINK, anullsink, asink);
diff --git a/libavfilter/asrc_flite.c b/libavfilter/asrc_flite.c
new file mode 100644
index 0000000..9226399
--- /dev/null
+++ b/libavfilter/asrc_flite.c
@@ -0,0 +1,274 @@
+/*
+ * Copyright (c) 2012 Stefano Sabatini
+ *
+ * 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
+ */
+
+/**
+ * @file
+ * flite voice synth source
+ */
+
+#include <flite/flite.h>
+#include "libavutil/audioconvert.h"
+#include "libavutil/file.h"
+#include "libavutil/opt.h"
+#include "avfilter.h"
+#include "audio.h"
+#include "formats.h"
+#include "internal.h"
+
+typedef struct {
+ const AVClass *class;
+ char *voice_str;
+ char *textfile;
+ char *text;
+ cst_wave *wave;
+ int16_t *wave_samples;
+ int wave_nb_samples;
+ int list_voices;
+ cst_voice *voice;
+ int64_t pts;
+ int frame_nb_samples; ///< number of samples per frame
+} FliteContext;
+
+#define OFFSET(x) offsetof(FliteContext, x)
+
+static const AVOption flite_options[] = {
+ { "list_voices", "list voices and exit", OFFSET(list_voices), AV_OPT_TYPE_INT, {.dbl=0}, 0, 1 },
+ { "nb_samples", "set number of samples per frame", OFFSET(frame_nb_samples), AV_OPT_TYPE_INT, {.dbl=512}, 0, INT_MAX },
+ { "n", "set number of samples per frame", OFFSET(frame_nb_samples), AV_OPT_TYPE_INT, {.dbl=512}, 0, INT_MAX },
+ { "text", "set text to speak", OFFSET(text), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX },
+ { "textfile", "set filename of the text to speak", OFFSET(textfile), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX },
+ { "v", "set voice", OFFSET(voice_str), AV_OPT_TYPE_STRING, {.str="kal"}, CHAR_MIN, CHAR_MAX },
+ { "voice", "set voice", OFFSET(voice_str), AV_OPT_TYPE_STRING, {.str="kal"}, CHAR_MIN, CHAR_MAX },
+ { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(flite);
+
+static volatile int flite_inited = 0;
+
+/* declare functions for all the supported voices */
+#define DECLARE_REGISTER_VOICE_FN(name) cst_voice *register_cmu_us_## name(const char *)
+DECLARE_REGISTER_VOICE_FN(awb);
+DECLARE_REGISTER_VOICE_FN(kal);
+DECLARE_REGISTER_VOICE_FN(kal16);
+DECLARE_REGISTER_VOICE_FN(rms);
+DECLARE_REGISTER_VOICE_FN(slt);
+
+struct voice_entry {
+ const char *name;
+ cst_voice * (*register_fn)(const char *);
+} voice_entry;
+
+static struct voice_entry voice_entries[] = {
+ { "awb", register_cmu_us_awb },
+ { "kal", register_cmu_us_kal },
+ { "kal16", register_cmu_us_kal16 },
+ { "rms", register_cmu_us_rms },
+ { "slt", register_cmu_us_slt },
+};
+
+static void list_voices(void *log_ctx, const char *sep)
+{
+ int i, n = FF_ARRAY_ELEMS(voice_entries);
+ for (i = 0; i < n; i++)
+ av_log(log_ctx, AV_LOG_INFO, "%s%s",
+ voice_entries[i].name, i < (n-1) ? sep : "\n");
+}
+
+static int select_voice(cst_voice **voice, const char *voice_name, void *log_ctx)
+{
+ int i;
+
+ for (i = 0; i < FF_ARRAY_ELEMS(voice_entries); i++) {
+ struct voice_entry *entry = &voice_entries[i];
+ if (!strcmp(entry->name, voice_name)) {
+ *voice = entry->register_fn(NULL);
+ if (!*voice) {
+ av_log(log_ctx, AV_LOG_ERROR,
+ "Could not register voice '%s'\n", voice_name);
+ return AVERROR_UNKNOWN;
+ }
+ return 0;
+ }
+ }
+
+ av_log(log_ctx, AV_LOG_ERROR, "Could not find voice '%s'\n", voice_name);
+ av_log(log_ctx, AV_LOG_INFO, "Choose between the voices: ");
+ list_voices(log_ctx, ", ");
+
+ return AVERROR(EINVAL);
+}
+
+static av_cold int init(AVFilterContext *ctx, const char *args)
+{
+ FliteContext *flite = ctx->priv;
+ int ret = 0;
+
+ flite->class = &flite_class;
+ av_opt_set_defaults(flite);
+
+ if ((ret = av_set_options_string(flite, args, "=", ":")) < 0) {
+ av_log(ctx, AV_LOG_ERROR, "Error parsing options string: '%s'\n", args);
+ return ret;
+ }
+
+ if (flite->list_voices) {
+ list_voices(ctx, "\n");
+ return AVERROR_EXIT;
+ }
+
+ if (!flite_inited) {
+ if (flite_init() < 0) {
+ av_log(ctx, AV_LOG_ERROR, "flite initialization failed\n");
+ return AVERROR_UNKNOWN;
+ }
+ flite_inited++;
+ }
+
+ if ((ret = select_voice(&flite->voice, flite->voice_str, ctx)) < 0)
+ return ret;
+
+ if (flite->textfile && flite->text) {
+ av_log(ctx, AV_LOG_ERROR,
+ "Both text and textfile options set: only one must be specified\n");
+ return AVERROR(EINVAL);
+ }
+
+ if (flite->textfile) {
+ uint8_t *textbuf;
+ size_t textbuf_size;
+
+ if ((ret = av_file_map(flite->textfile, &textbuf, &textbuf_size, 0, ctx)) < 0) {
+ av_log(ctx, AV_LOG_ERROR,
+ "The text file '%s' could not be read: %s\n",
+ flite->textfile, av_err2str(ret));
+ return ret;
+ }
+
+ if (!(flite->text = av_malloc(textbuf_size+1)))
+ return AVERROR(ENOMEM);
+ memcpy(flite->text, textbuf, textbuf_size);
+ flite->text[textbuf_size] = 0;
+ av_file_unmap(textbuf, textbuf_size);
+ }
+
+ if (!flite->text) {
+ av_log(ctx, AV_LOG_ERROR,
+ "No speech text specified, specify the 'text' or 'textfile' option\n");
+ return AVERROR(EINVAL);
+ }
+
+ /* synth all the file data in block */
+ flite->wave = flite_text_to_wave(flite->text, flite->voice);
+ flite->wave_samples = flite->wave->samples;
+ flite->wave_nb_samples = flite->wave->num_samples;
+ return 0;
+}
+
+static av_cold void uninit(AVFilterContext *ctx)
+{
+ FliteContext *flite = ctx->priv;
+
+ av_opt_free(flite);
+
+ delete_voice(flite->voice);
+ flite->voice = NULL;
+ delete_wave(flite->wave);
+ flite->wave = NULL;
+}
+
+static int query_formats(AVFilterContext *ctx)
+{
+ FliteContext *flite = ctx->priv;
+
+ AVFilterChannelLayouts *chlayouts = NULL;
+ int64_t chlayout = av_get_default_channel_layout(flite->wave->num_channels);
+ AVFilterFormats *sample_formats = NULL;
+ AVFilterFormats *sample_rates = NULL;
+
+ ff_add_channel_layout(&chlayouts, chlayout);
+ ff_set_common_channel_layouts(ctx, chlayouts);
+ ff_add_format(&sample_formats, AV_SAMPLE_FMT_S16);
+ ff_set_common_formats(ctx, sample_formats);
+ ff_add_format(&sample_rates, flite->wave->sample_rate);
+ ff_set_common_samplerates (ctx, sample_rates);
+
+ return 0;
+}
+
+static int config_props(AVFilterLink *outlink)
+{
+ AVFilterContext *ctx = outlink->src;
+ FliteContext *flite = ctx->priv;
+
+ outlink->sample_rate = flite->wave->sample_rate;
+ outlink->time_base = (AVRational){1, flite->wave->sample_rate};
+
+ av_log(ctx, AV_LOG_VERBOSE, "voice:%s fmt:%s sample_rate:%d\n",
+ flite->voice_str,
+ av_get_sample_fmt_name(outlink->format), outlink->sample_rate);
+ return 0;
+}
+
+static int request_frame(AVFilterLink *outlink)
+{
+ AVFilterBufferRef *samplesref;
+ FliteContext *flite = outlink->src->priv;
+ int nb_samples = FFMIN(flite->wave_nb_samples, flite->frame_nb_samples);
+
+ if (!nb_samples)
+ return AVERROR_EOF;
+
+ samplesref = ff_get_audio_buffer(outlink, AV_PERM_WRITE, nb_samples);
+ if (!samplesref)
+ return AVERROR(ENOMEM);
+
+ memcpy(samplesref->data[0], flite->wave_samples,
+ nb_samples * flite->wave->num_channels * 2);
+ samplesref->pts = flite->pts;
+ samplesref->pos = -1;
+ samplesref->audio->sample_rate = flite->wave->sample_rate;
+ flite->pts += nb_samples;
+ flite->wave_samples += nb_samples * flite->wave->num_channels;
+ flite->wave_nb_samples -= nb_samples;
+
+ return ff_filter_samples(outlink, samplesref);
+}
+
+AVFilter avfilter_asrc_flite = {
+ .name = "flite",
+ .description = NULL_IF_CONFIG_SMALL("Synthesize voice from text using libflite."),
+ .query_formats = query_formats,
+ .init = init,
+ .uninit = uninit,
+ .priv_size = sizeof(FliteContext),
+
+ .inputs = (const AVFilterPad[]) {{ .name = NULL}},
+
+ .outputs = (const AVFilterPad[]) {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_AUDIO,
+ .config_props = config_props,
+ .request_frame = request_frame,
+ },
+ { .name = NULL }
+ },
+};
diff --git a/libavfilter/version.h b/libavfilter/version.h
index 96af8d6..7d9b378 100644
--- a/libavfilter/version.h
+++ b/libavfilter/version.h
@@ -29,7 +29,7 @@
#include "libavutil/avutil.h"
#define LIBAVFILTER_VERSION_MAJOR 3
-#define LIBAVFILTER_VERSION_MINOR 3
+#define LIBAVFILTER_VERSION_MINOR 4
#define LIBAVFILTER_VERSION_MICRO 100
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
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