mirror of https://github.com/FFmpeg/FFmpeg.git
Stefano Sabatini
14 years ago
parent
fd2b6c1e4b
commit
66a5201819
7 changed files with 342 additions and 1 deletions
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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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