9b32a1988f
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@5982 a1c6a512-1295-4272-9138-f99709370657
224 lines
6.7 KiB
C
224 lines
6.7 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2005 Dave Chapman
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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/* Various "helper functions" common to all the xxx2wav decoder plugins */
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#include "plugin.h"
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#include "xxx2wav.h"
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static struct plugin_api* local_rb;
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int mem_ptr;
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int bufsize;
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unsigned char* mp3buf; // The actual MP3 buffer from Rockbox
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unsigned char* mallocbuf; // 512K from the start of MP3 buffer
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unsigned char* filebuf; // The rest of the MP3 buffer
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void* malloc(size_t size) {
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void* x;
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char s[32];
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x=&mallocbuf[mem_ptr];
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mem_ptr+=size+(size%4); // Keep memory 32-bit aligned (if it was already?)
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local_rb->snprintf(s,30,"Memory used: %d",mem_ptr);
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local_rb->lcd_putsxy(0,80,s);
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local_rb->lcd_update();
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return(x);
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}
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void* calloc(size_t nmemb, size_t size) {
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void* x;
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x=malloc(nmemb*size);
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local_rb->memset(x,0,nmemb*size);
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return(x);
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}
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void free(void* ptr) {
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(void)ptr;
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}
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void* realloc(void* ptr, size_t size) {
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void* x;
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(void)ptr;
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x=malloc(size);
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return(x);
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}
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void *memcpy(void *dest, const void *src, size_t n) {
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return(local_rb->memcpy(dest,src,n));
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}
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void *memset(void *s, int c, size_t n) {
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return(local_rb->memset(s,c,n));
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}
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int memcmp(const void *s1, const void *s2, size_t n) {
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return(local_rb->memcmp(s1,s2,n));
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}
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void* memmove(const void *s1, const void *s2, size_t n) {
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char* dest=(char*)s1;
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char* src=(char*)s2;
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size_t i;
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for (i=0;i<n;i++) { dest[i]=src[i]; }
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// while(n>0) { *(dest++)=*(src++); n--; }
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return(dest);
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}
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void qsort(void *base, size_t nmemb, size_t size, int(*compar)(const void *, const void *)) {
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local_rb->qsort(base,nmemb,size,compar);
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}
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void display_status(file_info_struct* file_info) {
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char s[32];
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unsigned long ticks_taken;
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unsigned long long speed;
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unsigned long xspeed;
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local_rb->snprintf(s,32,"Bytes read: %d",file_info->curpos);
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local_rb->lcd_putsxy(0,0,s);
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local_rb->snprintf(s,32,"Samples Decoded: %d",file_info->current_sample);
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local_rb->lcd_putsxy(0,20,s);
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local_rb->snprintf(s,32,"Frames Decoded: %d",file_info->frames_decoded);
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local_rb->lcd_putsxy(0,40,s);
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ticks_taken=*(local_rb->current_tick)-file_info->start_tick;
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/* e.g.:
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ticks_taken=500
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sam_fmt.rate=44,100
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samples_decoded=172,400
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(samples_decoded/sam_fmt.rate)*100=400 (time it should have taken)
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% Speed=(400/500)*100=80%
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*/
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if (ticks_taken==0) { ticks_taken=1; } // Avoid fp exception.
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speed=(100*file_info->current_sample)/file_info->samplerate;
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xspeed=(speed*10000)/ticks_taken;
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local_rb->snprintf(s,32,"Speed %ld.%02ld %% Secs: %d",(xspeed/100),(xspeed%100),ticks_taken/100);
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local_rb->lcd_putsxy(0,60,s);
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local_rb->lcd_update();
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}
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static unsigned char wav_header[44]={'R','I','F','F', // 0 - ChunkID
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0,0,0,0, // 4 - ChunkSize (filesize-8)
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'W','A','V','E', // 8 - Format
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'f','m','t',' ', // 12 - SubChunkID
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16,0,0,0, // 16 - SubChunk1ID // 16 for PCM
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1,0, // 20 - AudioFormat (1=16-bit)
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2,0, // 22 - NumChannels
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0,0,0,0, // 24 - SampleRate in Hz
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0,0,0,0, // 28 - Byte Rate (SampleRate*NumChannels*(BitsPerSample/8)
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4,0, // 32 - BlockAlign (== NumChannels * BitsPerSample/8)
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16,0, // 34 - BitsPerSample
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'd','a','t','a', // 36 - Subchunk2ID
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0,0,0,0 // 40 - Subchunk2Size
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};
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int local_init(char* infilename, char* outfilename, file_info_struct* file_info, struct plugin_api* rb) {
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char s[32];
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int i,n,bytesleft;
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local_rb=rb;
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mem_ptr=0;
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mp3buf=local_rb->plugin_get_mp3_buffer(&bufsize);
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mallocbuf=mp3buf;
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filebuf=&mp3buf[MALLOC_BUFSIZE];
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local_rb->snprintf(s,32,"mp3 bufsize: %d",bufsize);
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local_rb->lcd_putsxy(0,100,s);
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local_rb->lcd_update();
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file_info->infile=local_rb->open(infilename,O_RDONLY);
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file_info->outfile=local_rb->creat(outfilename,O_WRONLY);
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local_rb->write(file_info->outfile,wav_header,sizeof(wav_header));
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file_info->curpos=0;
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file_info->current_sample=0;
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file_info->frames_decoded=0;
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file_info->filesize=local_rb->filesize(file_info->infile);
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if (file_info->filesize > (bufsize-MALLOC_BUFSIZE)) {
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local_rb->close(file_info->infile);
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local_rb->splash(HZ*2, true, "File too large");
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return(1);
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}
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local_rb->snprintf(s,32,"Loading file...");
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local_rb->lcd_putsxy(0,0,s);
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local_rb->lcd_update();
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bytesleft=file_info->filesize;
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i=0;
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while (bytesleft > 0) {
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n=local_rb->read(file_info->infile,&filebuf[i],bytesleft);
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if (n < 0) {
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local_rb->close(file_info->infile);
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local_rb->splash(HZ*2, true, "ERROR READING FILE");
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return(1);
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}
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i+=n; bytesleft-=n;
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}
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local_rb->close(file_info->infile);
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return(0);
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}
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void close_wav(file_info_struct* file_info) {
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int x;
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int filesize=local_rb->filesize(file_info->outfile);
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/* We assume 16-bit, Stereo */
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local_rb->lseek(file_info->outfile,0,SEEK_SET);
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// ChunkSize
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x=filesize-8;
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wav_header[4]=(x&0xff);
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wav_header[5]=(x&0xff00)>>8;
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wav_header[6]=(x&0xff0000)>>16;
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wav_header[7]=(x&0xff000000)>>24;
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// Samplerate
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wav_header[24]=file_info->samplerate&0xff;
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wav_header[25]=(file_info->samplerate&0xff00)>>8;
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wav_header[26]=(file_info->samplerate&0xff0000)>>16;
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wav_header[27]=(file_info->samplerate&0xff000000)>>24;
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// ByteRate
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x=file_info->samplerate*4;
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wav_header[28]=(x&0xff);
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wav_header[29]=(x&0xff00)>>8;
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wav_header[30]=(x&0xff0000)>>16;
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wav_header[31]=(x&0xff000000)>>24;
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// Subchunk2Size
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x=filesize-44;
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wav_header[40]=(x&0xff);
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wav_header[41]=(x&0xff00)>>8;
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wav_header[42]=(x&0xff0000)>>16;
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wav_header[43]=(x&0xff000000)>>24;
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local_rb->write(file_info->outfile,wav_header,sizeof(wav_header));
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local_rb->close(file_info->outfile);
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}
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