shithub: mp3dec

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Create WAVE based on output file extension
- Fix commented code so it will compile OOTB (s/file_wav/file_out/).
- Automatically generate WAVE if the (optional) output file name ends with .wav

--- a/minimp3_test.c

+++ b/minimp3_test.c

@@ -3,8 +3,9 @@

 #include "minimp3.h"

 #include <stdio.h>

 #include <math.h>

+#include <string.h>

-/*static char *wav_header(int hz, int ch, int bips, int data_bytes)

+static char *wav_header(int hz, int ch, int bips, int data_bytes)

 {

     static char hdr[44] = "RIFFsizeWAVEfmt \x10\0\0\0\1\0ch_hz_abpsbabsdatasize";

     unsigned long nAvgBytesPerSec = bips*ch*hz >> 3;

@@ -19,19 +20,20 @@

     *(short *)(hdr + 0x22) = bips;

     *(int *  )(hdr + 0x28) = data_bytes;

     return hdr;

-}*/

+}

-static void decode_file(FILE *file_mp3, FILE *file_ref, FILE *file_out)

+static void decode_file(FILE *file_mp3, FILE *file_ref, FILE *file_out, const int wave_out)

 {

     static mp3dec_t mp3d;

     mp3dec_frame_info_t info;

-    int i, /*data_bytes, */samples, total_samples = 0, nbuf = 0, maxdiff = 0;

+    int i, data_bytes, samples, total_samples = 0, nbuf = 0, maxdiff = 0;

     double MSE = 0.0, psnr;

     unsigned char buf[4096];

     mp3dec_init(&mp3d);

-    //fwrite(wav_header(0, 0, 0, 0), 1, 44, file_wav);

+    if (wave_out)

+        fwrite(wav_header(0, 0, 0, 0), 1, 44, file_out);

     do

     {

@@ -72,9 +74,12 @@

         exit(1);

     }

-    //data_bytes = ftell(file_wav) - 44;

-    //rewind(file_wav);

-    //fwrite(wav_header(info.hz, info.channels, 16, data_bytes), 1, 44, file_wav);

+    if (wave_out)

+    {

+        data_bytes = ftell(file_out) - 44;

+        rewind(file_out);

+        fwrite(wav_header(info.hz, info.channels, 16, data_bytes), 1, 44, file_out);

+    }

     fclose(file_mp3);

     if (file_ref)

         fclose(file_ref);

@@ -87,11 +92,20 @@

     char *input_file_name  = (argc > 1) ? argv[1] : NULL;

     char *ref_file_name    = (argc > 2) ? argv[2] : NULL;

     char *output_file_name = (argc > 3) ? argv[3] : NULL;

+    int wave_out = 0;

+

+    if (output_file_name)

+    {

+        char *ext = strrchr(output_file_name, '.');

+        if (ext && !strcasecmp(ext+1, "wav"))

+            wave_out = 1;

+    }

+

     if (!input_file_name)

     {

         printf("error: no file names given\n");

         return 1;

     }

-    decode_file(fopen(input_file_name, "rb"), fopen(ref_file_name, "rb"), output_file_name ? fopen(output_file_name, "wb") : NULL);

+    decode_file(fopen(input_file_name, "rb"), fopen(ref_file_name, "rb"), output_file_name ? fopen(output_file_name, "wb") : NULL, wave_out);

     return 0;

 }