1 files changed, 167 insertions, 0 deletions

diff --git a/apps/codecs/libatrac/main.c b/apps/codecs/libatrac/main.c
new file mode 100644
index 0000000000..826dacf819
--- /dev/null
+++ b/apps/codecs/libatrac/main.c
@@ -0,0 +1,167 @@
+#include <stdio.h>
+#include <stdint.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <string.h>
+
+#include "atrac3.h"
+#include "../librm/rm.h"
+
+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=Uncompressed)
+    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 open_wav(char* filename) {
+    int fd,res;
+
+    fd=open(filename,O_CREAT|O_WRONLY|O_TRUNC,S_IRUSR|S_IWUSR);
+    if (fd >= 0) {
+        res = write(fd,wav_header,sizeof(wav_header));
+    }
+
+    return(fd);
+}
+
+void close_wav(int fd, RMContext *rmctx, ATRAC3Context *q) {
+    int x,res;
+    int filesize;
+    int bytes_per_sample = 2;
+    int samples_per_frame = q->samples_per_frame;
+    int nb_channels = rmctx->nb_channels;
+    int sample_rate = rmctx->sample_rate;
+    int nb_frames = rmctx->audio_framesize/rmctx->block_align * rmctx->nb_packets - 2; // first 2 frames have no valid audio; skipped in output
+
+    filesize= samples_per_frame*bytes_per_sample*nb_frames +44;
+    printf("Filesize = %d\n",filesize);
+
+    // 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;
+
+    // Number of channels
+    wav_header[22]=nb_channels;
+
+    // Samplerate
+    wav_header[24]=sample_rate&0xff;
+    wav_header[25]=(sample_rate&0xff00)>>8;
+    wav_header[26]=(sample_rate&0xff0000)>>16;
+    wav_header[27]=(sample_rate&0xff000000)>>24;
+
+    // ByteRate
+    x=sample_rate*bytes_per_sample*nb_channels;
+    wav_header[28]=(x&0xff);
+    wav_header[29]=(x&0xff00)>>8;
+    wav_header[30]=(x&0xff0000)>>16;
+    wav_header[31]=(x&0xff000000)>>24;
+
+    // BlockAlign
+    wav_header[32]=rmctx->block_align;//2*rmctx->nb_channels;
+
+    // Bits per sample
+    wav_header[34]=16;
+    
+    // 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;
+
+    lseek(fd,0,SEEK_SET);
+    res = write(fd,wav_header,sizeof(wav_header));
+    close(fd);
+}
+
+int main(int argc, char *argv[])
+{
+    int fd, fd_dec;
+    int res, i, datasize = 0;
+
+#ifdef DUMP_RAW_FRAMES 
+    char filename[15];
+    int fd_out;
+#endif
+    int16_t outbuf[2048];
+    uint16_t fs,sps,h;
+    uint32_t packet_count;
+    ATRAC3Context q;
+    RMContext rmctx;
+    RMPacket pkt;
+
+    memset(&q,0,sizeof(ATRAC3Context));
+    memset(&rmctx,0,sizeof(RMContext));
+    memset(&pkt,0,sizeof(RMPacket));
+
+    if (argc != 2) {
+        DEBUGF("Incorrect number of arguments\n");
+        return -1;
+    }
+
+    fd = open(argv[1],O_RDONLY);
+    if (fd < 0) {
+        DEBUGF("Error opening file %s\n", argv[1]);
+        return -1;
+    }
+    
+    /* copy the input rm file to a memory buffer */
+    uint8_t * filebuf = (uint8_t *)calloc((int)filesize(fd),sizeof(uint8_t));
+    res = read(fd,filebuf,filesize(fd)); 
+ 
+    fd_dec = open_wav("output.wav");
+    if (fd_dec < 0) {
+        DEBUGF("Error creating output file\n");
+        return -1;
+    }
+    res = real_parse_header(fd, &rmctx);
+    packet_count = rmctx.nb_packets;
+    rmctx.audio_framesize = rmctx.block_align;
+    rmctx.block_align = rmctx.sub_packet_size;
+    fs = rmctx.audio_framesize;
+    sps= rmctx.block_align;
+    h = rmctx.sub_packet_h;
+    atrac3_decode_init(&q,&rmctx);
+    
+    /* change the buffer pointer to point at the first audio frame */
+    advance_buffer(&filebuf, rmctx.data_offset + DATA_HEADER_SIZE);
+    while(packet_count)
+    {  
+        rm_get_packet(&filebuf, &rmctx, &pkt);
+        for(i = 0; i < rmctx.audio_pkt_cnt*(fs/sps) ; i++)
+        { 
+            /* output raw audio frames that are sent to the decoder into separate files */
+#ifdef DUMP_RAW_FRAMES 
+              snprintf(filename,sizeof(filename),"dump%d.raw",++x);
+              fd_out = open(filename,O_WRONLY|O_CREAT|O_APPEND);           
+              write(fd_out,pkt.frames[i],sps);  
+              close(fd_out);
+#endif
+            if(pkt.length > 0)
+                res = atrac3_decode_frame(&rmctx,&q, outbuf, &datasize, pkt.frames[i] , rmctx.block_align);
+            rmctx.frame_number++;
+            res = write(fd_dec,outbuf,datasize);                  
+        }
+        packet_count -= rmctx.audio_pkt_cnt;
+        rmctx.audio_pkt_cnt = 0;
+    }
+    close_wav(fd_dec, &rmctx, &q);
+    close(fd);
+
+  return 0;
+}