From 0c58c1198f51c8c8799490bbb6f1b224a43278b2 Mon Sep 17 00:00:00 2001
From: Ray <raysan5@gmail.com>
Date: Thu, 8 Sep 2016 01:03:05 +0200
Subject: Working on new audio functions...

---
 src/audio.c  | 32 ++++++++++++++++++++++++++------
 src/raylib.h |  2 +-
 2 files changed, 27 insertions(+), 7 deletions(-)

diff --git a/src/audio.c b/src/audio.c
index 11d0d6b9..7ef5afe1 100644
--- a/src/audio.c
+++ b/src/audio.c
@@ -218,11 +218,15 @@ Wave LoadWave(const char *fileName)
 }
 
 // Load wave data from float array data (32bit)
-Wave LoadWaveEx(float *data, int sampleRate, int sampleSize, int channels)
+Wave LoadWaveEx(float *data, int sampleCount, int sampleRate, int sampleSize, int channels)
 {
     Wave wave;
     
     wave.data = data;
+    wave.sampleCount = sampleCount;
+    wave.sampleRate = sampleRate;
+    wave.sampleSize = sampleSize;
+    wave.channels = channels;
     
     WaveFormat(&wave, sampleRate, sampleSize, channels);
     
@@ -579,15 +583,15 @@ Wave WaveCopy(Wave wave)
 {
     Wave newWave;
 
-    if (wave.sampleSize == 8) newWave.data = (unsigned char *)malloc(wave.sampleCount*sizeof(unsigned char));
-    else if (wave.sampleSize == 16) newWave.data = (short *)malloc(wave.sampleCount*sizeof(short));
-    else if (wave.sampleSize == 32) newWave.data = (float *)malloc(wave.sampleCount*sizeof(float));
+    if (wave.sampleSize == 8) newWave.data = (unsigned char *)malloc(wave.sampleCount*wave.channels*sizeof(unsigned char));
+    else if (wave.sampleSize == 16) newWave.data = (short *)malloc(wave.sampleCount*wave.channels*sizeof(short));
+    else if (wave.sampleSize == 32) newWave.data = (float *)malloc(wave.sampleCount*wave.channels*sizeof(float));
     else TraceLog(WARNING, "Wave sample size not supported for copy");
 
     if (newWave.data != NULL)
     {
         // NOTE: Size must be provided in bytes
-        memcpy(newWave.data, wave.data, wave.sampleCount);
+        memcpy(newWave.data, wave.data, wave.sampleCount*wave.channels*wave.sampleSize/8);
 
         newWave.sampleCount = wave.sampleCount;
         newWave.sampleRate = wave.sampleRate;
@@ -602,7 +606,23 @@ Wave WaveCopy(Wave wave)
 // NOTE: Security check in case of out-of-range
 void WaveCrop(Wave *wave, int initSample, int finalSample)
 {
-    // TODO: Crop wave to a samples range
+    if ((initSample >= 0) && (finalSample > 0) && (finalSample < wave->sampleCount))
+    {
+        // TODO: Review cropping (it could be simplified...)
+        
+        float *samples = GetWaveData(*wave);
+        float *cropSamples = (float *)malloc((finalSample - initSample)*sizeof(float));
+        
+        for (int i = initSample; i < finalSample; i++) cropSamples[i] = samples[i];
+
+        free(wave->data);
+        wave->data = cropSamples;
+        int sampleSize = wave->sampleSize;
+        wave->sampleSize = 32;
+
+        WaveFormat(wave, wave->sampleRate, sampleSize, wave->channels);
+    }
+    else TraceLog(WARNING, "Wave crop range out of bounds");
 }
 
 // Get samples data from wave as a floats array
diff --git a/src/raylib.h b/src/raylib.h
index ae3de038..3c815031 100644
--- a/src/raylib.h
+++ b/src/raylib.h
@@ -910,7 +910,7 @@ RLAPI void CloseAudioDevice(void);                                    // Close t
 RLAPI bool IsAudioDeviceReady(void);                                  // Check if audio device has been initialized successfully
 
 RLAPI Wave LoadWave(const char *fileName);                            // Load wave data from file into RAM
-RLAPI Wave LoadWaveEx(float *data, int sampleRate, int sampleSize, int channels); // Load wave data from float array data (32bit)
+RLAPI Wave LoadWaveEx(float *data, int sampleCount, int sampleRate, int sampleSize, int channels); // Load wave data from float array data (32bit)
 RLAPI Sound LoadSound(const char *fileName);                          // Load sound to memory
 RLAPI Sound LoadSoundFromWave(Wave wave);                             // Load sound to memory from wave data
 RLAPI Sound LoadSoundFromRES(const char *rresName, int resId);        // Load sound to memory from rRES file (raylib Resource)
-- 
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