292 lines
9.2 KiB
C
292 lines
9.2 KiB
C
/*
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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/channel_layout.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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struct voice_entry *voice_entry;
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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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#define FLAGS AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
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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, {.i64=0}, 0, 1, FLAGS },
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{ "nb_samples", "set number of samples per frame", OFFSET(frame_nb_samples), AV_OPT_TYPE_INT, {.i64=512}, 0, INT_MAX, FLAGS },
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{ "n", "set number of samples per frame", OFFSET(frame_nb_samples), AV_OPT_TYPE_INT, {.i64=512}, 0, INT_MAX, FLAGS },
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{ "text", "set text to speak", OFFSET(text), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
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{ "textfile", "set filename of the text to speak", OFFSET(textfile), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
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{ "v", "set voice", OFFSET(voice_str), AV_OPT_TYPE_STRING, {.str="kal"}, CHAR_MIN, CHAR_MAX, FLAGS },
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{ "voice", "set voice", OFFSET(voice_str), AV_OPT_TYPE_STRING, {.str="kal"}, CHAR_MIN, CHAR_MAX, FLAGS },
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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) \
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cst_voice *register_cmu_us_## name(const char *); \
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void unregister_cmu_us_## name(cst_voice *);
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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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void (*unregister_fn)(cst_voice *);
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cst_voice *voice;
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unsigned usage_count;
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} voice_entry;
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#define MAKE_VOICE_STRUCTURE(voice_name) { \
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.name = #voice_name, \
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.register_fn = register_cmu_us_ ## voice_name, \
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.unregister_fn = unregister_cmu_us_ ## voice_name, \
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}
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static struct voice_entry voice_entries[] = {
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MAKE_VOICE_STRUCTURE(awb),
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MAKE_VOICE_STRUCTURE(kal),
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MAKE_VOICE_STRUCTURE(kal16),
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MAKE_VOICE_STRUCTURE(rms),
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MAKE_VOICE_STRUCTURE(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(struct voice_entry **entry_ret, 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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if (!entry->voice)
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entry->voice = entry->register_fn(NULL);
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if (!entry->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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entry->usage_count++;
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*entry_ret = entry;
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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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return ret;
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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_entry, flite->voice_str, ctx)) < 0)
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return ret;
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flite->voice = flite->voice_entry->voice;
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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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if (!--flite->voice_entry->usage_count)
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flite->voice_entry->unregister_fn(flite->voice);
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flite->voice = NULL;
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flite->voice_entry = 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_frame(outlink, samplesref);
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}
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static const AVFilterPad flite_outputs[] = {
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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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{ NULL }
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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 = NULL,
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.outputs = flite_outputs,
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.priv_class = &flite_class,
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};
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