/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Copyright (C) 2004 Jörg Hohensohn * * This module collects the Talkbox and voice UI functions. * (Talkbox reads directory names from mp3 clips called thumbnails, * the voice UI lets menus and screens "talk" from a voicefont in memory. * * All files in this archive are subject to the GNU General Public License. * See the file COPYING in the source tree root for full license agreement. * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * ****************************************************************************/ #include #include #include "file.h" #include "buffer.h" #include "system.h" #include "mp3_playback.h" #include "mpeg.h" #include "lang.h" #include "talk.h" #include "id3.h" extern void bitswap(unsigned char *data, int length); /* no header for this */ /***************** Constants *****************/ #define QUEUE_SIZE 20 const char* voicefont_file = "/.rockbox/langs/english.voice"; const char* dir_thumbnail_name = ".dirname.mp3"; /***************** Data types *****************/ struct clip_entry /* one entry of the index table */ { int offset; /* offset from start of voicefont file */ int size; /* size of the clip */ }; struct voicefont /* file format of our "voicefont" */ { int version; /* version of the voicefont */ int headersize; /* size of the header, =offset to index */ int id_max; /* number of clips contained */ struct clip_entry index[]; /* followed by the index table */ /* and finally the bitswapped mp3 clips, not visible here */ }; struct queue_entry /* one entry of the internal queue */ { unsigned char* buf; int len; }; /***************** Globals *****************/ static unsigned char* p_thumbnail; /* buffer for thumbnail */ static long size_for_thumbnail; /* leftover buffer size for it */ static struct voicefont* p_voicefont; /* loaded voicefont */ static bool has_voicefont; /* a voicefont file is present */ static bool is_playing; /* we're currently playing */ static struct queue_entry queue[QUEUE_SIZE]; /* queue of scheduled clips */ static int queue_write; /* write index of queue, by application */ static int queue_read; /* read index of queue, by ISR context */ /***************** Private prototypes *****************/ static int load_voicefont(void); static void mp3_callback(unsigned char** start, int* size); static int shutup(void); static int queue_clip(unsigned char* buf, int size, bool enqueue); /***************** Private implementation *****************/ static int load_voicefont(void) { int fd; int size; p_voicefont = NULL; /* indicate no voicefont if we fail below */ fd = open(voicefont_file, O_RDONLY); if (fd < 0) /* failed to open */ { p_voicefont = NULL; /* indicate no voicefont */ has_voicefont = false; /* don't try again */ return 0; } size = read(fd, mp3buf, mp3end - mp3buf); if (size > 1000 && ((struct voicefont*)mp3buf)->headersize == offsetof(struct voicefont, index)) { p_voicefont = (struct voicefont*)mp3buf; /* thumbnail buffer is the remaining space behind */ p_thumbnail = mp3buf + size; p_thumbnail += (int)p_thumbnail % 2; /* 16-bit align */ size_for_thumbnail = mp3end - p_thumbnail; } else { has_voicefont = false; /* don't try again */ } close(fd); return size; } /* called in ISR context if mp3 data got consumed */ static void mp3_callback(unsigned char** start, int* size) { int play_now; if (queue[queue_read].len > 0) /* current clip not finished? */ { /* feed the next 64K-1 chunk */ play_now = MIN(queue[queue_read].len, 0xFFFF); *start = queue[queue_read].buf; *size = play_now; queue[queue_read].buf += play_now; queue[queue_read].len -= play_now; return; } else /* go to next entry */ { queue_read++; if (queue_read >= QUEUE_SIZE) queue_read = 0; } if (queue_read != queue_write) /* queue is not empty? */ { /* start next clip */ play_now = MIN(queue[queue_read].len, 0xFFFF); *start = queue[queue_read].buf; *size = play_now; queue[queue_read].buf += play_now; queue[queue_read].len -= play_now; } else { *size = 0; /* end of data */ is_playing = false; mp3_play_stop(); /* fixme: should be done by caller */ } } /* stop the playback and the pending clips, but at frame boundary */ static int shutup(void) { unsigned char* pos; unsigned char* search; unsigned char* end; /* one silent bitswapped mp3 frame (22kHz), without bit reservoir */ static const unsigned char silent_frame[] = { 0xFF,0xCF,0x08,0x23,0x00,0x00,0x00,0xC0,0x12,0x80,0x01,0x00,0x00, 0x32,0x82,0xB2,0xA2,0xCC,0x74,0x9C,0xCC,0xAA,0xAA,0xAA,0xAA,0xAA, }; mp3_play_pause(false); /* pause */ if (!is_playing) /* has ended anyway */ return 0; /* search next frame boundary and continue up to there */ pos = search = mp3_get_pos(); end = queue[queue_read].buf + queue[queue_read].len; /* Find the next frame boundary */ while (search < end) /* search the remaining data */ { if (*search++ != 0xFF) /* search for frame sync byte */ { continue; } /* look at the (bitswapped) 2nd byte of header candidate */ if ((*search & 0x07) == 0x07 /* rest of frame sync */ && (*search & 0x18) != 0x10 /* version != reserved */ && (*search & 0x60) != 0x00) /* layer != reserved */ { search--; /* back to the sync byte */ break; /* From looking at the first 2 bytes, this is a header. */ /* this is not a sufficient condition to find header, may give "false alert" (end too early), but a start */ } } queue_write = queue_read; /* reset the queue */ is_playing = false; /* play old data until the frame end, to keep the MAS in sync */ if (search-pos) queue_clip(pos, search-pos, true); /* If the voice clips contain dependent frames (currently they don't), it may be a good idea to insert an independent dummy frame here. */ queue_clip((unsigned char*)silent_frame, sizeof(silent_frame), true); return 0; } /* schedule a clip, at the end or discard the existing queue */ static int queue_clip(unsigned char* buf, int size, bool enqueue) { if (!enqueue) shutup(); /* cut off all the pending stuff */ queue[queue_write].buf = buf; queue[queue_write].len = size; /* FixMe: make this IRQ-safe */ if (!is_playing) { /* queue empty, we have to do the initial start */ int size_now = MIN(size, 0xFFFF); /* DMA can do no more */ is_playing = true; mp3_play_data(buf, size_now, mp3_callback); mp3_play_pause(true); /* kickoff audio */ queue[queue_write].buf += size_now; queue[queue_write].len -= size_now; } queue_write++; if (queue_write >= QUEUE_SIZE) queue_write = 0; return 0; } /***************** Public implementation *****************/ void talk_init(void) { int fd; fd = open(voicefont_file, O_RDONLY); if (fd >= 0) /* success */ { close(fd); has_voicefont = true; } else { has_voicefont = false; /* no voice file available */ } talk_buffer_steal(); /* abuse this for most of our inits */ queue_write = queue_read = 0; } /* somebody else claims the mp3 buffer, e.g. for regular play/record */ int talk_buffer_steal(void) { p_voicefont = NULL; /* indicate no voicefont (trashed) */ p_thumbnail = mp3buf; /* whole space for thumbnail */ size_for_thumbnail = mp3end - mp3buf; return 0; } /* play a voice ID from voicefont */ int talk_id(int id, bool enqueue) { int clipsize; unsigned char* clipbuf; int unit; if (mpeg_status()) /* busy, buffer in use */ return -1; if (p_voicefont == NULL && has_voicefont) load_voicefont(); /* reload needed */ if (p_voicefont == NULL) /* still no voices? */ return -1; /* check if this is a special ID, with a value */ unit = ((unsigned)id) >> UNIT_SHIFT; if (id != -1 && unit) { /* sign-extend the value */ //splash(200, true,"unit=%d", unit); id = (unsigned)id << (32-UNIT_SHIFT); id >>= (32-UNIT_SHIFT); talk_value(id, unit, enqueue); /* speak it */ return 0; /* and stop, end of special case */ } if (id < 0 || id >= p_voicefont->id_max) return -1; clipsize = p_voicefont->index[id].size; if (clipsize == 0) /* clip not included in voicefont */ return -1; clipbuf = mp3buf + p_voicefont->index[id].offset; queue_clip(clipbuf, clipsize, enqueue); return 0; } /* play a thumbnail from file */ int talk_file(char* filename, bool enqueue) { int fd; int size; struct mp3entry info; if (mpeg_status()) /* busy, buffer in use */ return -1; if (p_thumbnail == NULL || size_for_thumbnail <= 0) return -1; if(mp3info(&info, filename)) /* use this to find real start */ { return 0; /* failed to open, or invalid */ } fd = open(filename, O_RDONLY); if (fd < 0) /* failed to open */ { return 0; } lseek(fd, info.first_frame_offset, SEEK_SET); /* behind ID data */ size = read(fd, p_thumbnail, size_for_thumbnail); close(fd); /* ToDo: find audio, skip ID headers and trailers */ if (size) { bitswap(p_thumbnail, size); queue_clip(p_thumbnail, size, enqueue); } return size; } /* say a numeric value, this word ordering works for english, but not necessarily for other languages (e.g. german) */ int talk_number(int n, bool enqueue) { int level = 0; /* mille count */ int mil = 1000000000; /* highest possible "-illion" */ if (mpeg_status()) /* busy, buffer in use */ return -1; if (!enqueue) shutup(); /* cut off all the pending stuff */ if (n==0) { /* special case */ talk_id(VOICE_ZERO, true); return 0; } if (n<0) { talk_id(VOICE_MINUS, true); n = -n; } while (n) { int segment = n / mil; /* extract in groups of 3 digits */ n -= segment * mil; /* remove the used digits from number */ mil /= 1000; /* digit place for next round */ if (segment) { int hundreds = segment / 100; int ones = segment % 100; if (hundreds) { talk_id(VOICE_ZERO + hundreds, true); talk_id(VOICE_HUNDRED, true); } /* combination indexing */ if (ones > 20) { int tens = ones/10 + 18; talk_id(VOICE_ZERO + tens, true); ones %= 10; } /* direct indexing */ if (ones) talk_id(VOICE_ZERO + ones, true); /* add billion, million, thousand */ if (mil) talk_id(VOICE_BILLION + level, true); } level++; } return 0; } int talk_value(int n, int unit, bool enqueue) { int unit_id; const int unit_voiced[] = { /* lookup table for the voice ID of the units */ -1, -1, -1, /* regular ID, int, signed */ VOICE_MILLISECONDS, /* here come the "real" units */ VOICE_SECONDS, VOICE_MINUTES, VOICE_HOURS, VOICE_KHZ, VOICE_DB, VOICE_PERCENT, VOICE_MEGABYTE, VOICE_GIGABYTE, VOICE_MILLIAMPHOURS, VOICE_PIXEL, VOICE_PER_SEC, VOICE_HERTZ, }; if (mpeg_status()) /* busy, buffer in use */ return -1; if (unit < 0 || unit >= UNIT_LAST) unit_id = -1; else unit_id = unit_voiced[unit]; if ((n==1 || n==-1) /* singular? */ && unit_id >= VOICE_SECONDS && unit_id <= VOICE_HOURS) { unit_id--; /* use the singular for those units which have */ } /* special case with a "plus" before */ if (n > 0 && (unit == UNIT_SIGNED || unit == UNIT_DB)) { talk_id(VOICE_PLUS, enqueue); enqueue = true; } talk_number(n, enqueue); /* say the number */ talk_id(unit_id, true); /* say the unit, if any */ return 0; }