/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Copyright (C) 2005 Dave Chapman * * 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. * ****************************************************************************/ /* Various "helper functions" common to all the xxx2wav decoder plugins We include them as a .h because the plugin build system links exactly one .c file with exactly one .rock file. */ /* the main data structure of the program */ typedef struct { int infile; int outfile; off_t curpos; off_t filesize; int samplerate; int channels; int frames_decoded; unsigned long total_samples; unsigned long current_sample; unsigned long start_tick; } file_info_struct; file_info_struct file_info; #define MALLOC_BUFSIZE (512*1024) int mem_ptr; int bufsize; unsigned char* mp3buf; // The actual MP3 buffer from Rockbox unsigned char* mallocbuf; // 512K from the start of MP3 buffer unsigned char* filebuf; // The rest of the MP3 buffer void* malloc(size_t size) { void* x; char s[32]; x=&mallocbuf[mem_ptr]; mem_ptr+=size+(size%4); // Keep memory 32-bit aligned (if it was already?) rb->snprintf(s,30,"Memory used: %d\r",mem_ptr); rb->lcd_putsxy(0,80,s); rb->lcd_update(); return(x); } void* calloc(size_t nmemb, size_t size) { void* x; x=malloc(nmemb*size); rb->memset(x,0,nmemb*size); return(x); } void free(void* ptr) { (void)ptr; } void* realloc(void* ptr, size_t size) { void* x; (void)ptr; x=malloc(size); return(x); } void *memcpy(void *dest, const void *src, size_t n) { return(rb->memcpy(dest,src,n)); } void *memset(void *s, int c, size_t n) { return(rb->memset(s,c,n)); } int memcmp(const void *s1, const void *s2, size_t n) { return(rb->memcmp(s1,s2,n)); } void* memmove(const void *s1, const void *s2, size_t n) { char* dest=(char*)s1; char* src=(char*)s2; size_t i; for (i=0;i0) { *(dest++)=*(src++); n--; } return(dest); } void qsort(void *base, size_t nmemb, size_t size, int(*compar)(const void *, const void *)) { rb->qsort(base,nmemb,size,compar); } void display_status(file_info_struct* file_info) { char s[32]; unsigned long ticks_taken; unsigned long long speed; unsigned long xspeed; rb->snprintf(s,32,"Bytes read: %d\r",file_info->curpos); rb->lcd_putsxy(0,0,s); rb->snprintf(s,32,"Samples Decoded: %d\r",file_info->current_sample); rb->lcd_putsxy(0,20,s); rb->snprintf(s,32,"Frames Decoded: %d\r",file_info->frames_decoded); rb->lcd_putsxy(0,40,s); ticks_taken=*(rb->current_tick)-file_info->start_tick; /* e.g.: ticks_taken=500 sam_fmt.rate=44,100 samples_decoded=172,400 (samples_decoded/sam_fmt.rate)*100=400 (time it should have taken) % Speed=(400/500)*100=80% */ if (ticks_taken==0) { ticks_taken=1; } // Avoid fp exception. speed=(100*file_info->current_sample)/file_info->samplerate; xspeed=(speed*10000)/ticks_taken; rb->snprintf(s,32,"Speed %ld.%02ld %% Secs: %d",(xspeed/100),(xspeed%100),ticks_taken/100); rb->lcd_putsxy(0,60,s); rb->lcd_update(); } static unsigned char wav_header[44]={'R','I','F','F', // 0 - ChunkID 0,0,0,0, // 4 - ChunkSize (filesize-8) 'W','A','V','E', // 8 - Format 'f','m','t',' ', // 12 - SubChunkID 16,0,0,0, // 16 - SubChunk1ID // 16 for PCM 1,0, // 20 - AudioFormat (1=16-bit) 2,0, // 22 - NumChannels 0,0,0,0, // 24 - SampleRate in Hz 0,0,0,0, // 28 - Byte Rate (SampleRate*NumChannels*(BitsPerSample/8) 4,0, // 32 - BlockAlign (== NumChannels * BitsPerSample/8) 16,0, // 34 - BitsPerSample 'd','a','t','a', // 36 - Subchunk2ID 0,0,0,0 // 40 - Subchunk2Size }; int local_init(char* file, file_info_struct* file_info) { char s[32]; int i,n,bytesleft; mem_ptr=0; mp3buf=rb->plugin_get_mp3_buffer(&bufsize); mallocbuf=mp3buf; filebuf=&mp3buf[MALLOC_BUFSIZE]; rb->snprintf(s,32,"mp3 bufsize: %d\r",bufsize); rb->lcd_putsxy(0,100,s); rb->lcd_update(); file_info->infile=rb->open(file,O_RDONLY); file_info->outfile=rb->creat("/ac3test.wav",O_WRONLY); rb->write(file_info->outfile,wav_header,sizeof(wav_header)); file_info->curpos=0; file_info->frames_decoded=0; file_info->filesize=rb->filesize(file_info->infile); if (file_info->filesize > (bufsize-MALLOC_BUFSIZE)) { rb->close(file_info->infile); rb->splash(HZ*2, true, "File too large"); return(1); } rb->snprintf(s,32,"Loading file..."); rb->lcd_putsxy(0,0,s); rb->lcd_update(); bytesleft=file_info->filesize; i=0; while (bytesleft > 0) { n=rb->read(file_info->infile,&filebuf[i],bytesleft); if (n < 0) { rb->close(file_info->infile); rb->splash(HZ*2, true, "ERROR READING FILE"); return(1); } i+=n; bytesleft-=n; } rb->close(file_info->infile); return(0); } void close_wav(file_info_struct* file_info) { int x; int filesize=rb->filesize(file_info->outfile); /* We assume 16-bit, Stereo */ rb->lseek(file_info->outfile,0,SEEK_SET); // ChunkSize x=filesize-8; wav_header[4]=(x&0xff); wav_header[5]=(x&0xff00)>>8; wav_header[6]=(x&0xff0000)>>16; wav_header[7]=(x&0xff000000)>>24; // Samplerate wav_header[24]=file_info->samplerate&0xff; wav_header[25]=(file_info->samplerate&0xff00)>>8; wav_header[26]=(file_info->samplerate&0xff0000)>>16; wav_header[27]=(file_info->samplerate&0xff000000)>>24; // ByteRate x=file_info->samplerate*4; wav_header[28]=(x&0xff); wav_header[29]=(x&0xff00)>>8; wav_header[30]=(x&0xff0000)>>16; wav_header[31]=(x&0xff000000)>>24; // Subchunk2Size x=filesize-44; wav_header[40]=(x&0xff); wav_header[41]=(x&0xff00)>>8; wav_header[42]=(x&0xff0000)>>16; wav_header[43]=(x&0xff000000)>>24; rb->write(file_info->outfile,wav_header,sizeof(wav_header)); rb->close(file_info->outfile); }