/* * 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/channel_layout.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) { FliteContext *flite = ctx->priv; int ret = 0; 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; 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) { AVFrame *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, 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; av_frame_set_pkt_pos(samplesref, -1); av_frame_set_sample_rate(samplesref, 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_frame(outlink, samplesref); } static const AVFilterPad flite_outputs[] = { { .name = "default", .type = AVMEDIA_TYPE_AUDIO, .config_props = config_props, .request_frame = request_frame, }, { NULL } }; AVFilter ff_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 = NULL, .outputs = flite_outputs, .priv_class = &flite_class, };