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/***************************************************************************
* __________ __ ___.
* 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 */
#include "plugin.h"
#include "xxx2wav.h"
static struct plugin_api* local_rb;
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?)
local_rb->snprintf(s,30,"Memory used: %d",mem_ptr);
local_rb->lcd_putsxy(0,80,s);
local_rb->lcd_update();
return(x);
}
void* calloc(size_t nmemb, size_t size) {
void* x;
x=malloc(nmemb*size);
local_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(local_rb->memcpy(dest,src,n));
}
void *memset(void *s, int c, size_t n) {
return(local_rb->memset(s,c,n));
}
int memcmp(const void *s1, const void *s2, size_t n) {
return(local_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;i<n;i++) { dest[i]=src[i]; }
// while(n>0) { *(dest++)=*(src++); n--; }
return(dest);
}
void qsort(void *base, size_t nmemb, size_t size, int(*compar)(const void *, const void *)) {
local_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;
local_rb->snprintf(s,32,"Bytes read: %d",file_info->curpos);
local_rb->lcd_putsxy(0,0,s);
local_rb->snprintf(s,32,"Samples Decoded: %d",file_info->current_sample);
local_rb->lcd_putsxy(0,20,s);
local_rb->snprintf(s,32,"Frames Decoded: %d",file_info->frames_decoded);
local_rb->lcd_putsxy(0,40,s);
ticks_taken=*(local_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;
local_rb->snprintf(s,32,"Speed %ld.%02ld %% Secs: %d",(xspeed/100),(xspeed%100),ticks_taken/100);
local_rb->lcd_putsxy(0,60,s);
local_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* infilename, char* outfilename, file_info_struct* file_info, struct plugin_api* rb) {
char s[32];
int i,n,bytesleft;
local_rb=rb;
mem_ptr=0;
mp3buf=local_rb->plugin_get_mp3_buffer(&bufsize);
mallocbuf=mp3buf;
filebuf=&mp3buf[MALLOC_BUFSIZE];
local_rb->snprintf(s,32,"mp3 bufsize: %d",bufsize);
local_rb->lcd_putsxy(0,100,s);
local_rb->lcd_update();
file_info->infile=local_rb->open(infilename,O_RDONLY);
file_info->outfile=local_rb->creat(outfilename,O_WRONLY);
local_rb->write(file_info->outfile,wav_header,sizeof(wav_header));
file_info->curpos=0;
file_info->current_sample=0;
file_info->frames_decoded=0;
file_info->filesize=local_rb->filesize(file_info->infile);
if (file_info->filesize > (bufsize-MALLOC_BUFSIZE)) {
local_rb->close(file_info->infile);
local_rb->splash(HZ*2, true, "File too large");
return(1);
}
local_rb->snprintf(s,32,"Loading file...");
local_rb->lcd_putsxy(0,0,s);
local_rb->lcd_update();
bytesleft=file_info->filesize;
i=0;
while (bytesleft > 0) {
n=local_rb->read(file_info->infile,&filebuf[i],bytesleft);
if (n < 0) {
local_rb->close(file_info->infile);
local_rb->splash(HZ*2, true, "ERROR READING FILE");
return(1);
}
i+=n; bytesleft-=n;
}
local_rb->close(file_info->infile);
return(0);
}
void close_wav(file_info_struct* file_info) {
int x;
int filesize=local_rb->filesize(file_info->outfile);
/* We assume 16-bit, Stereo */
local_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;
local_rb->write(file_info->outfile,wav_header,sizeof(wav_header));
local_rb->close(file_info->outfile);
}
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