1/* 2 * Copyright (c) 2012 Stefano Sabatini 3 * 4 * This file is part of FFmpeg. 5 * 6 * FFmpeg is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * FFmpeg is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with FFmpeg; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21/** 22 * @file 23 * flite voice synth source 24 */ 25 26#include <flite/flite.h> 27#include "libavutil/channel_layout.h" 28#include "libavutil/file.h" 29#include "libavutil/opt.h" 30#include "avfilter.h" 31#include "audio.h" 32#include "formats.h" 33#include "internal.h" 34 35typedef struct { 36 const AVClass *class; 37 char *voice_str; 38 char *textfile; 39 char *text; 40 cst_wave *wave; 41 int16_t *wave_samples; 42 int wave_nb_samples; 43 int list_voices; 44 cst_voice *voice; 45 struct voice_entry *voice_entry; 46 int64_t pts; 47 int frame_nb_samples; ///< number of samples per frame 48} FliteContext; 49 50#define OFFSET(x) offsetof(FliteContext, x) 51#define FLAGS AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM 52 53static const AVOption flite_options[] = { 54 { "list_voices", "list voices and exit", OFFSET(list_voices), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS }, 55 { "nb_samples", "set number of samples per frame", OFFSET(frame_nb_samples), AV_OPT_TYPE_INT, {.i64=512}, 0, INT_MAX, FLAGS }, 56 { "n", "set number of samples per frame", OFFSET(frame_nb_samples), AV_OPT_TYPE_INT, {.i64=512}, 0, INT_MAX, FLAGS }, 57 { "text", "set text to speak", OFFSET(text), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS }, 58 { "textfile", "set filename of the text to speak", OFFSET(textfile), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS }, 59 { "v", "set voice", OFFSET(voice_str), AV_OPT_TYPE_STRING, {.str="kal"}, CHAR_MIN, CHAR_MAX, FLAGS }, 60 { "voice", "set voice", OFFSET(voice_str), AV_OPT_TYPE_STRING, {.str="kal"}, CHAR_MIN, CHAR_MAX, FLAGS }, 61 { NULL } 62}; 63 64AVFILTER_DEFINE_CLASS(flite); 65 66static volatile int flite_inited = 0; 67 68/* declare functions for all the supported voices */ 69#define DECLARE_REGISTER_VOICE_FN(name) \ 70 cst_voice *register_cmu_us_## name(const char *); \ 71 void unregister_cmu_us_## name(cst_voice *); 72DECLARE_REGISTER_VOICE_FN(awb); 73DECLARE_REGISTER_VOICE_FN(kal); 74DECLARE_REGISTER_VOICE_FN(kal16); 75DECLARE_REGISTER_VOICE_FN(rms); 76DECLARE_REGISTER_VOICE_FN(slt); 77 78struct voice_entry { 79 const char *name; 80 cst_voice * (*register_fn)(const char *); 81 void (*unregister_fn)(cst_voice *); 82 cst_voice *voice; 83 unsigned usage_count; 84} voice_entry; 85 86#define MAKE_VOICE_STRUCTURE(voice_name) { \ 87 .name = #voice_name, \ 88 .register_fn = register_cmu_us_ ## voice_name, \ 89 .unregister_fn = unregister_cmu_us_ ## voice_name, \ 90} 91static struct voice_entry voice_entries[] = { 92 MAKE_VOICE_STRUCTURE(awb), 93 MAKE_VOICE_STRUCTURE(kal), 94 MAKE_VOICE_STRUCTURE(kal16), 95 MAKE_VOICE_STRUCTURE(rms), 96 MAKE_VOICE_STRUCTURE(slt), 97}; 98 99static void list_voices(void *log_ctx, const char *sep) 100{ 101 int i, n = FF_ARRAY_ELEMS(voice_entries); 102 for (i = 0; i < n; i++) 103 av_log(log_ctx, AV_LOG_INFO, "%s%s", 104 voice_entries[i].name, i < (n-1) ? sep : "\n"); 105} 106 107static int select_voice(struct voice_entry **entry_ret, const char *voice_name, void *log_ctx) 108{ 109 int i; 110 111 for (i = 0; i < FF_ARRAY_ELEMS(voice_entries); i++) { 112 struct voice_entry *entry = &voice_entries[i]; 113 if (!strcmp(entry->name, voice_name)) { 114 if (!entry->voice) 115 entry->voice = entry->register_fn(NULL); 116 if (!entry->voice) { 117 av_log(log_ctx, AV_LOG_ERROR, 118 "Could not register voice '%s'\n", voice_name); 119 return AVERROR_UNKNOWN; 120 } 121 entry->usage_count++; 122 *entry_ret = entry; 123 return 0; 124 } 125 } 126 127 av_log(log_ctx, AV_LOG_ERROR, "Could not find voice '%s'\n", voice_name); 128 av_log(log_ctx, AV_LOG_INFO, "Choose between the voices: "); 129 list_voices(log_ctx, ", "); 130 131 return AVERROR(EINVAL); 132} 133 134static av_cold int init(AVFilterContext *ctx) 135{ 136 FliteContext *flite = ctx->priv; 137 int ret = 0; 138 139 if (flite->list_voices) { 140 list_voices(ctx, "\n"); 141 return AVERROR_EXIT; 142 } 143 144 if (!flite_inited) { 145 if (flite_init() < 0) { 146 av_log(ctx, AV_LOG_ERROR, "flite initialization failed\n"); 147 return AVERROR_UNKNOWN; 148 } 149 flite_inited++; 150 } 151 152 if ((ret = select_voice(&flite->voice_entry, flite->voice_str, ctx)) < 0) 153 return ret; 154 flite->voice = flite->voice_entry->voice; 155 156 if (flite->textfile && flite->text) { 157 av_log(ctx, AV_LOG_ERROR, 158 "Both text and textfile options set: only one must be specified\n"); 159 return AVERROR(EINVAL); 160 } 161 162 if (flite->textfile) { 163 uint8_t *textbuf; 164 size_t textbuf_size; 165 166 if ((ret = av_file_map(flite->textfile, &textbuf, &textbuf_size, 0, ctx)) < 0) { 167 av_log(ctx, AV_LOG_ERROR, 168 "The text file '%s' could not be read: %s\n", 169 flite->textfile, av_err2str(ret)); 170 return ret; 171 } 172 173 if (!(flite->text = av_malloc(textbuf_size+1))) 174 return AVERROR(ENOMEM); 175 memcpy(flite->text, textbuf, textbuf_size); 176 flite->text[textbuf_size] = 0; 177 av_file_unmap(textbuf, textbuf_size); 178 } 179 180 if (!flite->text) { 181 av_log(ctx, AV_LOG_ERROR, 182 "No speech text specified, specify the 'text' or 'textfile' option\n"); 183 return AVERROR(EINVAL); 184 } 185 186 /* synth all the file data in block */ 187 flite->wave = flite_text_to_wave(flite->text, flite->voice); 188 flite->wave_samples = flite->wave->samples; 189 flite->wave_nb_samples = flite->wave->num_samples; 190 return 0; 191} 192 193static av_cold void uninit(AVFilterContext *ctx) 194{ 195 FliteContext *flite = ctx->priv; 196 197 if (!--flite->voice_entry->usage_count) 198 flite->voice_entry->unregister_fn(flite->voice); 199 flite->voice = NULL; 200 flite->voice_entry = NULL; 201 delete_wave(flite->wave); 202 flite->wave = NULL; 203} 204 205static int query_formats(AVFilterContext *ctx) 206{ 207 FliteContext *flite = ctx->priv; 208 209 AVFilterChannelLayouts *chlayouts = NULL; 210 int64_t chlayout = av_get_default_channel_layout(flite->wave->num_channels); 211 AVFilterFormats *sample_formats = NULL; 212 AVFilterFormats *sample_rates = NULL; 213 214 ff_add_channel_layout(&chlayouts, chlayout); 215 ff_set_common_channel_layouts(ctx, chlayouts); 216 ff_add_format(&sample_formats, AV_SAMPLE_FMT_S16); 217 ff_set_common_formats(ctx, sample_formats); 218 ff_add_format(&sample_rates, flite->wave->sample_rate); 219 ff_set_common_samplerates (ctx, sample_rates); 220 221 return 0; 222} 223 224static int config_props(AVFilterLink *outlink) 225{ 226 AVFilterContext *ctx = outlink->src; 227 FliteContext *flite = ctx->priv; 228 229 outlink->sample_rate = flite->wave->sample_rate; 230 outlink->time_base = (AVRational){1, flite->wave->sample_rate}; 231 232 av_log(ctx, AV_LOG_VERBOSE, "voice:%s fmt:%s sample_rate:%d\n", 233 flite->voice_str, 234 av_get_sample_fmt_name(outlink->format), outlink->sample_rate); 235 return 0; 236} 237 238static int request_frame(AVFilterLink *outlink) 239{ 240 AVFrame *samplesref; 241 FliteContext *flite = outlink->src->priv; 242 int nb_samples = FFMIN(flite->wave_nb_samples, flite->frame_nb_samples); 243 244 if (!nb_samples) 245 return AVERROR_EOF; 246 247 samplesref = ff_get_audio_buffer(outlink, nb_samples); 248 if (!samplesref) 249 return AVERROR(ENOMEM); 250 251 memcpy(samplesref->data[0], flite->wave_samples, 252 nb_samples * flite->wave->num_channels * 2); 253 samplesref->pts = flite->pts; 254 av_frame_set_pkt_pos(samplesref, -1); 255 av_frame_set_sample_rate(samplesref, flite->wave->sample_rate); 256 flite->pts += nb_samples; 257 flite->wave_samples += nb_samples * flite->wave->num_channels; 258 flite->wave_nb_samples -= nb_samples; 259 260 return ff_filter_frame(outlink, samplesref); 261} 262 263static const AVFilterPad flite_outputs[] = { 264 { 265 .name = "default", 266 .type = AVMEDIA_TYPE_AUDIO, 267 .config_props = config_props, 268 .request_frame = request_frame, 269 }, 270 { NULL } 271}; 272 273AVFilter ff_asrc_flite = { 274 .name = "flite", 275 .description = NULL_IF_CONFIG_SMALL("Synthesize voice from text using libflite."), 276 .query_formats = query_formats, 277 .init = init, 278 .uninit = uninit, 279 .priv_size = sizeof(FliteContext), 280 .inputs = NULL, 281 .outputs = flite_outputs, 282 .priv_class = &flite_class, 283}; 284