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-rw-r--r--libavfilter/asrc_flite.c292
1 files changed, 292 insertions, 0 deletions
diff --git a/libavfilter/asrc_flite.c b/libavfilter/asrc_flite.c
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+++ b/libavfilter/asrc_flite.c
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+/*
+ * 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;
+ struct voice_entry *voice_entry;
+ int64_t pts;
+ int frame_nb_samples; ///< number of samples per frame
+} FliteContext;
+
+#define OFFSET(x) offsetof(FliteContext, x)
+#define FLAGS AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
+
+static const AVOption flite_options[] = {
+ { "list_voices", "list voices and exit", OFFSET(list_voices), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS },
+ { "nb_samples", "set number of samples per frame", OFFSET(frame_nb_samples), AV_OPT_TYPE_INT, {.i64=512}, 0, INT_MAX, FLAGS },
+ { "n", "set number of samples per frame", OFFSET(frame_nb_samples), AV_OPT_TYPE_INT, {.i64=512}, 0, INT_MAX, FLAGS },
+ { "text", "set text to speak", OFFSET(text), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
+ { "textfile", "set filename of the text to speak", OFFSET(textfile), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
+ { "v", "set voice", OFFSET(voice_str), AV_OPT_TYPE_STRING, {.str="kal"}, CHAR_MIN, CHAR_MAX, FLAGS },
+ { "voice", "set voice", OFFSET(voice_str), AV_OPT_TYPE_STRING, {.str="kal"}, CHAR_MIN, CHAR_MAX, FLAGS },
+ { 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 *); \
+ void unregister_cmu_us_## name(cst_voice *);
+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 *);
+ void (*unregister_fn)(cst_voice *);
+ cst_voice *voice;
+ unsigned usage_count;
+} voice_entry;
+
+#define MAKE_VOICE_STRUCTURE(voice_name) { \
+ .name = #voice_name, \
+ .register_fn = register_cmu_us_ ## voice_name, \
+ .unregister_fn = unregister_cmu_us_ ## voice_name, \
+}
+static struct voice_entry voice_entries[] = {
+ MAKE_VOICE_STRUCTURE(awb),
+ MAKE_VOICE_STRUCTURE(kal),
+ MAKE_VOICE_STRUCTURE(kal16),
+ MAKE_VOICE_STRUCTURE(rms),
+ MAKE_VOICE_STRUCTURE(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(struct voice_entry **entry_ret, 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)) {
+ if (!entry->voice)
+ entry->voice = entry->register_fn(NULL);
+ if (!entry->voice) {
+ av_log(log_ctx, AV_LOG_ERROR,
+ "Could not register voice '%s'\n", voice_name);
+ return AVERROR_UNKNOWN;
+ }
+ entry->usage_count++;
+ *entry_ret = entry;
+ 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)
+ 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_entry, flite->voice_str, ctx)) < 0)
+ return ret;
+ flite->voice = flite->voice_entry->voice;
+
+ 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);
+
+ if (!--flite->voice_entry->usage_count)
+ flite->voice_entry->unregister_fn(flite->voice);
+ flite->voice = NULL;
+ flite->voice_entry = 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 }
+ },
+
+ .priv_class = &flite_class,
+};
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