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https://github.com/QB64-Phoenix-Edition/QB64pe.git
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85 lines
2 KiB
C
85 lines
2 KiB
C
#ifndef DEPENDENCY_AUDIO_DECODE_MP3
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//Stubs:
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//(none required)
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#else
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#ifdef QB64_BACKSLASH_FILESYSTEM
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#include "src\\mpg123.h"
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#include "src\\mpglib.h"
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#else
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#include "src/mpg123.h"
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#include "src/mpglib.h"
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#endif
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//mpg123 decoding 'stuff'
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int frequencies[9] = { 44100, 48000, 32000, 22050, 24000, 16000 , 11025 , 12000 , 8000 };
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int bitrates[15] = { 0,32,40,48, 56, 64, 80, 96,112,128,160,192,224,256,320 };
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#define MP3_ERR -1
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#define MP3_OK 0
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#define MP3_NEED_MORE 1
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snd_sequence_struct *snd_decode_mp3(uint8 *buffer,int32 bytes){
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static int status;
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static struct mpstr mp;
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InitMP3(&mp);
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static int inlen;
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static int outlen;
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outlen=0;
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static int OUT_BUF_SIZE;
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OUT_BUF_SIZE=8192;
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static char *bufin,*bufin_backup;
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static char *bufout,*bufout_backup;
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static int32 bufout_size;
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static int32 out_bytes;
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inlen=bytes;
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bufin=(char*)buffer; bufin_backup=bufin;
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bufout_size=1000000;
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bufout=(char*)malloc(bufout_size); bufout_backup=bufout;
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out_bytes=0;
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status = decodeMP3(&mp,bufin,inlen,bufout,OUT_BUF_SIZE,&outlen);
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bufout+=outlen;
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out_bytes+=outlen;
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ddd:
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status = decodeMP3(&mp,NULL,NULL,bufout,OUT_BUF_SIZE,&outlen);
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bufout+=outlen;
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out_bytes+=outlen;
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if (out_bytes>((bufout_size*3)/4)){//if buffer 75%+ full double its size
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bufout_size*=2;
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bufout_backup=(char*)realloc(bufout_backup,bufout_size);
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bufout=bufout_backup+out_bytes;
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}
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if (status==0) goto ddd;
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//trim bufout
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bufout=bufout_backup;
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bufout=(char*)realloc(bufout,out_bytes);
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//attach bufout to new sequence
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static int32 seq_handle; seq_handle=list_add(snd_sequences);
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static snd_sequence_struct *seq; seq=(snd_sequence_struct*)list_get(snd_sequences,seq_handle);
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memset(seq,0,sizeof(snd_sequence_struct));
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seq->references=1;
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seq->data=(uint8*)bufout;
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seq->data_size=out_bytes;
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seq->channels=mp.fr.stereo;
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seq->endian=0;//native
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//***signed 16-bit 44100***
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seq->is_unsigned=0;
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seq->sample_rate=44100;
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seq->bits_per_sample=16;
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return seq;
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}
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#endif
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