Update external audio libraries.

1 files changed, 285 insertions, 181 deletions

diff --git a/src/external/dr_wav.h b/src/external/dr_wav.h
index 536df8f3..f11dc2a8 100644
--- a/src/external/dr_wav.h
+++ b/src/external/dr_wav.h
@@ -1,5 +1,5 @@
 // WAV audio loader and writer. Public domain. See "unlicense" statement at the end of this file.
-// dr_wav - v0.7a - 2017-11-17
+// dr_wav - v0.7f - 2018-02-05
 //
 // David Reid - [email protected]
 
@@ -103,8 +103,8 @@
 //   - Signed 16-bit PCM
 //   - Signed 24-bit PCM
 //   - Signed 32-bit PCM
-//   - IEEE 32-bit floating point.
-//   - IEEE 64-bit floating point.
+//   - IEEE 32-bit floating point
+//   - IEEE 64-bit floating point
 //   - A-law and u-law
 //   - Microsoft ADPCM
 //   - IMA ADPCM (DVI, format code 0x11)
@@ -643,13 +643,13 @@ drwav_int16* drwav_open_and_read_s16(drwav_read_proc onRead, drwav_seek_proc onS
 float* drwav_open_and_read_f32(drwav_read_proc onRead, drwav_seek_proc onSeek, void* pUserData, unsigned int* channels, unsigned int* sampleRate, drwav_uint64* totalSampleCount);
 drwav_int32* drwav_open_and_read_s32(drwav_read_proc onRead, drwav_seek_proc onSeek, void* pUserData, unsigned int* channels, unsigned int* sampleRate, drwav_uint64* totalSampleCount);
 #ifndef DR_WAV_NO_STDIO
-// Opens an decodes a wav file in a single operation.
+// Opens and decodes a wav file in a single operation.
 drwav_int16* drwav_open_and_read_file_s16(const char* filename, unsigned int* channels, unsigned int* sampleRate, drwav_uint64* totalSampleCount);
 float* drwav_open_and_read_file_f32(const char* filename, unsigned int* channels, unsigned int* sampleRate, drwav_uint64* totalSampleCount);
 drwav_int32* drwav_open_and_read_file_s32(const char* filename, unsigned int* channels, unsigned int* sampleRate, drwav_uint64* totalSampleCount);
 #endif
 
-// Opens an decodes a wav file from a block of memory in a single operation.
+// Opens and decodes a wav file from a block of memory in a single operation.
 drwav_int16* drwav_open_and_read_memory_s16(const void* data, size_t dataSize, unsigned int* channels, unsigned int* sampleRate, drwav_uint64* totalSampleCount);
 float* drwav_open_and_read_memory_f32(const void* data, size_t dataSize, unsigned int* channels, unsigned int* sampleRate, drwav_uint64* totalSampleCount);
 drwav_int32* drwav_open_and_read_memory_s32(const void* data, size_t dataSize, unsigned int* channels, unsigned int* sampleRate, drwav_uint64* totalSampleCount);
@@ -820,6 +820,9 @@ static DRWAV_INLINE drwav_bool32 drwav__is_compressed_format_tag(drwav_uint16 fo
 }
 
 
+drwav_uint64 drwav_read_s16__msadpcm(drwav* pWav, drwav_uint64 samplesToRead, drwav_int16* pBufferOut);
+drwav_uint64 drwav_read_s16__ima(drwav* pWav, drwav_uint64 samplesToRead, drwav_int16* pBufferOut);
+
 typedef struct
 {
     union
@@ -1395,6 +1398,11 @@ drwav_bool32 drwav_init(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onS
         return DRWAV_FALSE;    // Failed to read the "fmt " chunk.
     }
 
+    // Basic validation.
+    if (fmt.sampleRate == 0 || fmt.channels == 0 || fmt.bitsPerSample == 0 || fmt.blockAlign == 0) {
+        return DRWAV_FALSE; // Invalid channel count. Probably an invalid WAV file.
+    }
+
 
     // Translate the internal format.
     unsigned short translatedFormatTag = fmt.formatTag;
@@ -1470,11 +1478,16 @@ drwav_bool32 drwav_init(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onS
     pWav->sampleRate          = fmt.sampleRate;
     pWav->channels            = fmt.channels;
     pWav->bitsPerSample       = fmt.bitsPerSample;
-    pWav->bytesPerSample      = (unsigned int)(fmt.blockAlign / fmt.channels);
+    pWav->bytesPerSample      = fmt.blockAlign / fmt.channels;
     pWav->bytesRemaining      = dataSize;
     pWav->translatedFormatTag = translatedFormatTag;
     pWav->dataChunkDataSize   = dataSize;
 
+    // The bytes per sample should never be 0 at this point. This would indicate an invalid WAV file.
+    if (pWav->bytesPerSample == 0) {
+        return DRWAV_FALSE;
+    }
+
     if (sampleCountFromFactChunk != 0) {
         pWav->totalSampleCount = sampleCountFromFactChunk * fmt.channels;
     } else {
@@ -1489,18 +1502,26 @@ drwav_bool32 drwav_init(drwav* pWav, drwav_read_proc onRead, drwav_seek_proc onS
             pWav->totalSampleCount = ((blockCount * (fmt.blockAlign - (4*pWav->channels))) * 2) + (blockCount * pWav->channels);
         }
     }
-    
-    if (pWav->translatedFormatTag == DR_WAVE_FORMAT_ADPCM) {
+
+    // The way we calculate the bytes per sample does not make sense for compressed formats so we just set it to 0.
+    if (drwav__is_compressed_format_tag(pWav->translatedFormatTag)) {
         pWav->bytesPerSample = 0;
     }
 
+    // Some formats only support a certain number of channels.
+    if (pWav->translatedFormatTag == DR_WAVE_FORMAT_ADPCM || pWav->translatedFormatTag == DR_WAVE_FORMAT_DVI_ADPCM) {
+        if (pWav->channels > 2) {
+            return DRWAV_FALSE;
+        }
+    }
+
 #ifdef DR_WAV_LIBSNDFILE_COMPAT
     // I use libsndfile as a benchmark for testing, however in the version I'm using (from the Windows installer on the libsndfile website),
     // it appears the total sample count libsndfile uses for MS-ADPCM is incorrect. It would seem they are computing the total sample count
     // from the number of blocks, however this results in the inclusion of the extra silent samples at the end of the last block. The correct
     // way to know the total sample count is to inspect the "fact" chunk which should always be present for compressed formats, and should
     // always include the sample count. This little block of code below is only used to emulate the libsndfile logic so I can properly run my
-    // correctness tests against libsndfile and is disabled by default.
+    // correctness tests against libsndfile, and is disabled by default.
     if (pWav->translatedFormatTag == DR_WAVE_FORMAT_ADPCM) {
         drwav_uint64 blockCount = dataSize / fmt.blockAlign;
         pWav->totalSampleCount = (blockCount * (fmt.blockAlign - (6*pWav->channels))) * 2;  // x2 because two samples per byte.
@@ -1798,27 +1819,40 @@ drwav_bool32 drwav_seek_to_sample(drwav* pWav, drwav_uint64 sample)
     // to seek back to the start.
     if (drwav__is_compressed_format_tag(pWav->translatedFormatTag)) {
         // TODO: This can be optimized.
+        
+        // If we're seeking forward it's simple - just keep reading samples until we hit the sample we're requesting. If we're seeking backwards,
+        // we first need to seek back to the start and then just do the same thing as a forward seek.
+        if (sample < pWav->compressed.iCurrentSample) {
+            if (!drwav_seek_to_first_sample(pWav)) {
+                return DRWAV_FALSE;
+            }
+        }
+
         if (sample > pWav->compressed.iCurrentSample) {
-            // Seeking forward - just move from the current position.
             drwav_uint64 offset = sample - pWav->compressed.iCurrentSample;
 
             drwav_int16 devnull[2048];
             while (offset > 0) {
-                drwav_uint64 samplesToRead = sample;
+                drwav_uint64 samplesToRead = offset;
                 if (samplesToRead > 2048) {
                     samplesToRead = 2048;
                 }
 
-                drwav_uint64 samplesRead = drwav_read_s16(pWav, samplesToRead, devnull);
+                drwav_uint64 samplesRead = 0;
+                if (pWav->translatedFormatTag == DR_WAVE_FORMAT_ADPCM) {
+                    samplesRead = drwav_read_s16__msadpcm(pWav, samplesToRead, devnull);
+                } else if (pWav->translatedFormatTag == DR_WAVE_FORMAT_DVI_ADPCM) {
+                    samplesRead = drwav_read_s16__ima(pWav, samplesToRead, devnull);
+                } else {
+                    assert(DRWAV_FALSE);    // If this assertion is triggered it means I've implemented a new compressed format but forgot to add a branch for it here.
+                }
+
                 if (samplesRead != samplesToRead) {
                     return DRWAV_FALSE;
                 }
 
                 offset -= samplesRead;
             }
-        } else {
-            // Seeking backwards. Just use the fallback.
-            goto fallback;
         }
     } else {
         drwav_uint64 totalSizeInBytes = pWav->totalSampleCount * pWav->bytesPerSample;
@@ -1851,30 +1885,6 @@ drwav_bool32 drwav_seek_to_sample(drwav* pWav, drwav_uint64 sample)
     }
 
     return DRWAV_TRUE;
-
-fallback:
-    // This is a generic seek implementation that just continuously reads samples into a temporary buffer. This should work for all supported
-    // formats, but it is not efficient. This should be used as a fall back.
-    if (!drwav_seek_to_first_sample(pWav)) {
-        return DRWAV_FALSE;
-    }
-
-    drwav_int16 devnull[2048];
-    while (sample > 0) {
-        drwav_uint64 samplesToRead = sample;
-        if (samplesToRead > 2048) {
-            samplesToRead = 2048;
-        }
-
-        drwav_uint64 samplesRead = drwav_read_s16(pWav, samplesToRead, devnull);
-        if (samplesRead != samplesToRead) {
-            return DRWAV_FALSE;
-        }
-
-        sample -= samplesRead;
-    }
-
-    return DRWAV_TRUE;
 }
 
 
@@ -1906,132 +1916,6 @@ drwav_uint64 drwav_write(drwav* pWav, drwav_uint64 samplesToWrite, const void* p
 }
 
 
-#ifndef DR_WAV_NO_CONVERSION_API
-static unsigned short g_drwavAlawTable[256] = {
-    0xEA80, 0xEB80, 0xE880, 0xE980, 0xEE80, 0xEF80, 0xEC80, 0xED80, 0xE280, 0xE380, 0xE080, 0xE180, 0xE680, 0xE780, 0xE480, 0xE580, 
-    0xF540, 0xF5C0, 0xF440, 0xF4C0, 0xF740, 0xF7C0, 0xF640, 0xF6C0, 0xF140, 0xF1C0, 0xF040, 0xF0C0, 0xF340, 0xF3C0, 0xF240, 0xF2C0, 
-    0xAA00, 0xAE00, 0xA200, 0xA600, 0xBA00, 0xBE00, 0xB200, 0xB600, 0x8A00, 0x8E00, 0x8200, 0x8600, 0x9A00, 0x9E00, 0x9200, 0x9600, 
-    0xD500, 0xD700, 0xD100, 0xD300, 0xDD00, 0xDF00, 0xD900, 0xDB00, 0xC500, 0xC700, 0xC100, 0xC300, 0xCD00, 0xCF00, 0xC900, 0xCB00, 
-    0xFEA8, 0xFEB8, 0xFE88, 0xFE98, 0xFEE8, 0xFEF8, 0xFEC8, 0xFED8, 0xFE28, 0xFE38, 0xFE08, 0xFE18, 0xFE68, 0xFE78, 0xFE48, 0xFE58, 
-    0xFFA8, 0xFFB8, 0xFF88, 0xFF98, 0xFFE8, 0xFFF8, 0xFFC8, 0xFFD8, 0xFF28, 0xFF38, 0xFF08, 0xFF18, 0xFF68, 0xFF78, 0xFF48, 0xFF58, 
-    0xFAA0, 0xFAE0, 0xFA20, 0xFA60, 0xFBA0, 0xFBE0, 0xFB20, 0xFB60, 0xF8A0, 0xF8E0, 0xF820, 0xF860, 0xF9A0, 0xF9E0, 0xF920, 0xF960, 
-    0xFD50, 0xFD70, 0xFD10, 0xFD30, 0xFDD0, 0xFDF0, 0xFD90, 0xFDB0, 0xFC50, 0xFC70, 0xFC10, 0xFC30, 0xFCD0, 0xFCF0, 0xFC90, 0xFCB0, 
-    0x1580, 0x1480, 0x1780, 0x1680, 0x1180, 0x1080, 0x1380, 0x1280, 0x1D80, 0x1C80, 0x1F80, 0x1E80, 0x1980, 0x1880, 0x1B80, 0x1A80, 
-    0x0AC0, 0x0A40, 0x0BC0, 0x0B40, 0x08C0, 0x0840, 0x09C0, 0x0940, 0x0EC0, 0x0E40, 0x0FC0, 0x0F40, 0x0CC0, 0x0C40, 0x0DC0, 0x0D40, 
-    0x5600, 0x5200, 0x5E00, 0x5A00, 0x4600, 0x4200, 0x4E00, 0x4A00, 0x7600, 0x7200, 0x7E00, 0x7A00, 0x6600, 0x6200, 0x6E00, 0x6A00, 
-    0x2B00, 0x2900, 0x2F00, 0x2D00, 0x2300, 0x2100, 0x2700, 0x2500, 0x3B00, 0x3900, 0x3F00, 0x3D00, 0x3300, 0x3100, 0x3700, 0x3500, 
-    0x0158, 0x0148, 0x0178, 0x0168, 0x0118, 0x0108, 0x0138, 0x0128, 0x01D8, 0x01C8, 0x01F8, 0x01E8, 0x0198, 0x0188, 0x01B8, 0x01A8, 
-    0x0058, 0x0048, 0x0078, 0x0068, 0x0018, 0x0008, 0x0038, 0x0028, 0x00D8, 0x00C8, 0x00F8, 0x00E8, 0x0098, 0x0088, 0x00B8, 0x00A8, 
-    0x0560, 0x0520, 0x05E0, 0x05A0, 0x0460, 0x0420, 0x04E0, 0x04A0, 0x0760, 0x0720, 0x07E0, 0x07A0, 0x0660, 0x0620, 0x06E0, 0x06A0, 
-    0x02B0, 0x0290, 0x02F0, 0x02D0, 0x0230, 0x0210, 0x0270, 0x0250, 0x03B0, 0x0390, 0x03F0, 0x03D0, 0x0330, 0x0310, 0x0370, 0x0350
-};
-
-static unsigned short g_drwavMulawTable[256] = {
-    0x8284, 0x8684, 0x8A84, 0x8E84, 0x9284, 0x9684, 0x9A84, 0x9E84, 0xA284, 0xA684, 0xAA84, 0xAE84, 0xB284, 0xB684, 0xBA84, 0xBE84, 
-    0xC184, 0xC384, 0xC584, 0xC784, 0xC984, 0xCB84, 0xCD84, 0xCF84, 0xD184, 0xD384, 0xD584, 0xD784, 0xD984, 0xDB84, 0xDD84, 0xDF84, 
-    0xE104, 0xE204, 0xE304, 0xE404, 0xE504, 0xE604, 0xE704, 0xE804, 0xE904, 0xEA04, 0xEB04, 0xEC04, 0xED04, 0xEE04, 0xEF04, 0xF004, 
-    0xF0C4, 0xF144, 0xF1C4, 0xF244, 0xF2C4, 0xF344, 0xF3C4, 0xF444, 0xF4C4, 0xF544, 0xF5C4, 0xF644, 0xF6C4, 0xF744, 0xF7C4, 0xF844, 
-    0xF8A4, 0xF8E4, 0xF924, 0xF964, 0xF9A4, 0xF9E4, 0xFA24, 0xFA64, 0xFAA4, 0xFAE4, 0xFB24, 0xFB64, 0xFBA4, 0xFBE4, 0xFC24, 0xFC64, 
-    0xFC94, 0xFCB4, 0xFCD4, 0xFCF4, 0xFD14, 0xFD34, 0xFD54, 0xFD74, 0xFD94, 0xFDB4, 0xFDD4, 0xFDF4, 0xFE14, 0xFE34, 0xFE54, 0xFE74, 
-    0xFE8C, 0xFE9C, 0xFEAC, 0xFEBC, 0xFECC, 0xFEDC, 0xFEEC, 0xFEFC, 0xFF0C, 0xFF1C, 0xFF2C, 0xFF3C, 0xFF4C, 0xFF5C, 0xFF6C, 0xFF7C, 
-    0xFF88, 0xFF90, 0xFF98, 0xFFA0, 0xFFA8, 0xFFB0, 0xFFB8, 0xFFC0, 0xFFC8, 0xFFD0, 0xFFD8, 0xFFE0, 0xFFE8, 0xFFF0, 0xFFF8, 0x0000, 
-    0x7D7C, 0x797C, 0x757C, 0x717C, 0x6D7C, 0x697C, 0x657C, 0x617C, 0x5D7C, 0x597C, 0x557C, 0x517C, 0x4D7C, 0x497C, 0x457C, 0x417C, 
-    0x3E7C, 0x3C7C, 0x3A7C, 0x387C, 0x367C, 0x347C, 0x327C, 0x307C, 0x2E7C, 0x2C7C, 0x2A7C, 0x287C, 0x267C, 0x247C, 0x227C, 0x207C, 
-    0x1EFC, 0x1DFC, 0x1CFC, 0x1BFC, 0x1AFC, 0x19FC, 0x18FC, 0x17FC, 0x16FC, 0x15FC, 0x14FC, 0x13FC, 0x12FC, 0x11FC, 0x10FC, 0x0FFC, 
-    0x0F3C, 0x0EBC, 0x0E3C, 0x0DBC, 0x0D3C, 0x0CBC, 0x0C3C, 0x0BBC, 0x0B3C, 0x0ABC, 0x0A3C, 0x09BC, 0x093C, 0x08BC, 0x083C, 0x07BC, 
-    0x075C, 0x071C, 0x06DC, 0x069C, 0x065C, 0x061C, 0x05DC, 0x059C, 0x055C, 0x051C, 0x04DC, 0x049C, 0x045C, 0x041C, 0x03DC, 0x039C, 
-    0x036C, 0x034C, 0x032C, 0x030C, 0x02EC, 0x02CC, 0x02AC, 0x028C, 0x026C, 0x024C, 0x022C, 0x020C, 0x01EC, 0x01CC, 0x01AC, 0x018C, 
-    0x0174, 0x0164, 0x0154, 0x0144, 0x0134, 0x0124, 0x0114, 0x0104, 0x00F4, 0x00E4, 0x00D4, 0x00C4, 0x00B4, 0x00A4, 0x0094, 0x0084, 
-    0x0078, 0x0070, 0x0068, 0x0060, 0x0058, 0x0050, 0x0048, 0x0040, 0x0038, 0x0030, 0x0028, 0x0020, 0x0018, 0x0010, 0x0008, 0x0000
-};
-
-static DRWAV_INLINE drwav_int16 drwav__alaw_to_s16(drwav_uint8 sampleIn)
-{
-    return (short)g_drwavAlawTable[sampleIn];
-}
-
-static DRWAV_INLINE drwav_int16 drwav__mulaw_to_s16(drwav_uint8 sampleIn)
-{
-    return (short)g_drwavMulawTable[sampleIn];
-}
-
-
-
-static void drwav__pcm_to_s16(drwav_int16* pOut, const unsigned char* pIn, size_t totalSampleCount, unsigned short bytesPerSample)
-{
-    // Special case for 8-bit sample data because it's treated as unsigned.
-    if (bytesPerSample == 1) {
-        drwav_u8_to_s16(pOut, pIn, totalSampleCount);
-        return;
-    }
-
-
-    // Slightly more optimal implementation for common formats.
-    if (bytesPerSample == 2) {
-        for (unsigned int i = 0; i < totalSampleCount; ++i) {
-           *pOut++ = ((drwav_int16*)pIn)[i];
-        }
-        return;
-    }
-    if (bytesPerSample == 3) {
-        drwav_s24_to_s16(pOut, pIn, totalSampleCount);
-        return;
-    }
-    if (bytesPerSample == 4) {
-        drwav_s32_to_s16(pOut, (const drwav_int32*)pIn, totalSampleCount);
-        return;
-    }
-
-
-    // Generic, slow converter.
-    for (unsigned int i = 0; i < totalSampleCount; ++i) {
-        unsigned short sample = 0;
-        unsigned short shift  = (8 - bytesPerSample) * 8;
-        for (unsigned short j = 0; j < bytesPerSample && j < 2; ++j) {
-            sample |= (unsigned short)(pIn[j]) << shift;
-            shift  += 8;
-        }
-
-        pIn += bytesPerSample;
-        *pOut++ = sample;
-    }
-}
-
-static void drwav__ieee_to_s16(drwav_int16* pOut, const unsigned char* pIn, size_t totalSampleCount, unsigned short bytesPerSample)
-{
-    if (bytesPerSample == 4) {
-        drwav_f32_to_s16(pOut, (float*)pIn, totalSampleCount);
-        return;
-    } else {
-        drwav_f64_to_s16(pOut, (double*)pIn, totalSampleCount);
-        return;
-    }
-}
-
-drwav_uint64 drwav_read_s16__pcm(drwav* pWav, drwav_uint64 samplesToRead, drwav_int16* pBufferOut)
-{
-    // Fast path.
-    if (pWav->bytesPerSample == 2) {
-        return drwav_read(pWav, samplesToRead, pBufferOut);
-    }
-
-    drwav_uint64 totalSamplesRead = 0;
-    unsigned char sampleData[4096];
-    while (samplesToRead > 0) {
-        drwav_uint64 samplesRead = drwav_read(pWav, drwav_min(samplesToRead, sizeof(sampleData)/pWav->bytesPerSample), sampleData);
-        if (samplesRead == 0) {
-            break;
-        }
-
-        drwav__pcm_to_s16(pBufferOut, sampleData, (size_t)samplesRead, pWav->bytesPerSample);
-
-        pBufferOut       += samplesRead;
-        samplesToRead    -= samplesRead;
-        totalSamplesRead += samplesRead;
-    }
-
-    return totalSamplesRead;
-}
 
 drwav_uint64 drwav_read_s16__msadpcm(drwav* pWav, drwav_uint64 samplesToRead, drwav_int16* pBufferOut)
 {
@@ -2334,6 +2218,147 @@ drwav_uint64 drwav_read_s16__ima(drwav* pWav, drwav_uint64 samplesToRead, drwav_
     return totalSamplesRead;
 }
 
+
+#ifndef DR_WAV_NO_CONVERSION_API
+static unsigned short g_drwavAlawTable[256] = {
+    0xEA80, 0xEB80, 0xE880, 0xE980, 0xEE80, 0xEF80, 0xEC80, 0xED80, 0xE280, 0xE380, 0xE080, 0xE180, 0xE680, 0xE780, 0xE480, 0xE580, 
+    0xF540, 0xF5C0, 0xF440, 0xF4C0, 0xF740, 0xF7C0, 0xF640, 0xF6C0, 0xF140, 0xF1C0, 0xF040, 0xF0C0, 0xF340, 0xF3C0, 0xF240, 0xF2C0, 
+    0xAA00, 0xAE00, 0xA200, 0xA600, 0xBA00, 0xBE00, 0xB200, 0xB600, 0x8A00, 0x8E00, 0x8200, 0x8600, 0x9A00, 0x9E00, 0x9200, 0x9600, 
+    0xD500, 0xD700, 0xD100, 0xD300, 0xDD00, 0xDF00, 0xD900, 0xDB00, 0xC500, 0xC700, 0xC100, 0xC300, 0xCD00, 0xCF00, 0xC900, 0xCB00, 
+    0xFEA8, 0xFEB8, 0xFE88, 0xFE98, 0xFEE8, 0xFEF8, 0xFEC8, 0xFED8, 0xFE28, 0xFE38, 0xFE08, 0xFE18, 0xFE68, 0xFE78, 0xFE48, 0xFE58, 
+    0xFFA8, 0xFFB8, 0xFF88, 0xFF98, 0xFFE8, 0xFFF8, 0xFFC8, 0xFFD8, 0xFF28, 0xFF38, 0xFF08, 0xFF18, 0xFF68, 0xFF78, 0xFF48, 0xFF58, 
+    0xFAA0, 0xFAE0, 0xFA20, 0xFA60, 0xFBA0, 0xFBE0, 0xFB20, 0xFB60, 0xF8A0, 0xF8E0, 0xF820, 0xF860, 0xF9A0, 0xF9E0, 0xF920, 0xF960, 
+    0xFD50, 0xFD70, 0xFD10, 0xFD30, 0xFDD0, 0xFDF0, 0xFD90, 0xFDB0, 0xFC50, 0xFC70, 0xFC10, 0xFC30, 0xFCD0, 0xFCF0, 0xFC90, 0xFCB0, 
+    0x1580, 0x1480, 0x1780, 0x1680, 0x1180, 0x1080, 0x1380, 0x1280, 0x1D80, 0x1C80, 0x1F80, 0x1E80, 0x1980, 0x1880, 0x1B80, 0x1A80, 
+    0x0AC0, 0x0A40, 0x0BC0, 0x0B40, 0x08C0, 0x0840, 0x09C0, 0x0940, 0x0EC0, 0x0E40, 0x0FC0, 0x0F40, 0x0CC0, 0x0C40, 0x0DC0, 0x0D40, 
+    0x5600, 0x5200, 0x5E00, 0x5A00, 0x4600, 0x4200, 0x4E00, 0x4A00, 0x7600, 0x7200, 0x7E00, 0x7A00, 0x6600, 0x6200, 0x6E00, 0x6A00, 
+    0x2B00, 0x2900, 0x2F00, 0x2D00, 0x2300, 0x2100, 0x2700, 0x2500, 0x3B00, 0x3900, 0x3F00, 0x3D00, 0x3300, 0x3100, 0x3700, 0x3500, 
+    0x0158, 0x0148, 0x0178, 0x0168, 0x0118, 0x0108, 0x0138, 0x0128, 0x01D8, 0x01C8, 0x01F8, 0x01E8, 0x0198, 0x0188, 0x01B8, 0x01A8, 
+    0x0058, 0x0048, 0x0078, 0x0068, 0x0018, 0x0008, 0x0038, 0x0028, 0x00D8, 0x00C8, 0x00F8, 0x00E8, 0x0098, 0x0088, 0x00B8, 0x00A8, 
+    0x0560, 0x0520, 0x05E0, 0x05A0, 0x0460, 0x0420, 0x04E0, 0x04A0, 0x0760, 0x0720, 0x07E0, 0x07A0, 0x0660, 0x0620, 0x06E0, 0x06A0, 
+    0x02B0, 0x0290, 0x02F0, 0x02D0, 0x0230, 0x0210, 0x0270, 0x0250, 0x03B0, 0x0390, 0x03F0, 0x03D0, 0x0330, 0x0310, 0x0370, 0x0350
+};
+
+static unsigned short g_drwavMulawTable[256] = {
+    0x8284, 0x8684, 0x8A84, 0x8E84, 0x9284, 0x9684, 0x9A84, 0x9E84, 0xA284, 0xA684, 0xAA84, 0xAE84, 0xB284, 0xB684, 0xBA84, 0xBE84, 
+    0xC184, 0xC384, 0xC584, 0xC784, 0xC984, 0xCB84, 0xCD84, 0xCF84, 0xD184, 0xD384, 0xD584, 0xD784, 0xD984, 0xDB84, 0xDD84, 0xDF84, 
+    0xE104, 0xE204, 0xE304, 0xE404, 0xE504, 0xE604, 0xE704, 0xE804, 0xE904, 0xEA04, 0xEB04, 0xEC04, 0xED04, 0xEE04, 0xEF04, 0xF004, 
+    0xF0C4, 0xF144, 0xF1C4, 0xF244, 0xF2C4, 0xF344, 0xF3C4, 0xF444, 0xF4C4, 0xF544, 0xF5C4, 0xF644, 0xF6C4, 0xF744, 0xF7C4, 0xF844, 
+    0xF8A4, 0xF8E4, 0xF924, 0xF964, 0xF9A4, 0xF9E4, 0xFA24, 0xFA64, 0xFAA4, 0xFAE4, 0xFB24, 0xFB64, 0xFBA4, 0xFBE4, 0xFC24, 0xFC64, 
+    0xFC94, 0xFCB4, 0xFCD4, 0xFCF4, 0xFD14, 0xFD34, 0xFD54, 0xFD74, 0xFD94, 0xFDB4, 0xFDD4, 0xFDF4, 0xFE14, 0xFE34, 0xFE54, 0xFE74, 
+    0xFE8C, 0xFE9C, 0xFEAC, 0xFEBC, 0xFECC, 0xFEDC, 0xFEEC, 0xFEFC, 0xFF0C, 0xFF1C, 0xFF2C, 0xFF3C, 0xFF4C, 0xFF5C, 0xFF6C, 0xFF7C, 
+    0xFF88, 0xFF90, 0xFF98, 0xFFA0, 0xFFA8, 0xFFB0, 0xFFB8, 0xFFC0, 0xFFC8, 0xFFD0, 0xFFD8, 0xFFE0, 0xFFE8, 0xFFF0, 0xFFF8, 0x0000, 
+    0x7D7C, 0x797C, 0x757C, 0x717C, 0x6D7C, 0x697C, 0x657C, 0x617C, 0x5D7C, 0x597C, 0x557C, 0x517C, 0x4D7C, 0x497C, 0x457C, 0x417C, 
+    0x3E7C, 0x3C7C, 0x3A7C, 0x387C, 0x367C, 0x347C, 0x327C, 0x307C, 0x2E7C, 0x2C7C, 0x2A7C, 0x287C, 0x267C, 0x247C, 0x227C, 0x207C, 
+    0x1EFC, 0x1DFC, 0x1CFC, 0x1BFC, 0x1AFC, 0x19FC, 0x18FC, 0x17FC, 0x16FC, 0x15FC, 0x14FC, 0x13FC, 0x12FC, 0x11FC, 0x10FC, 0x0FFC, 
+    0x0F3C, 0x0EBC, 0x0E3C, 0x0DBC, 0x0D3C, 0x0CBC, 0x0C3C, 0x0BBC, 0x0B3C, 0x0ABC, 0x0A3C, 0x09BC, 0x093C, 0x08BC, 0x083C, 0x07BC, 
+    0x075C, 0x071C, 0x06DC, 0x069C, 0x065C, 0x061C, 0x05DC, 0x059C, 0x055C, 0x051C, 0x04DC, 0x049C, 0x045C, 0x041C, 0x03DC, 0x039C, 
+    0x036C, 0x034C, 0x032C, 0x030C, 0x02EC, 0x02CC, 0x02AC, 0x028C, 0x026C, 0x024C, 0x022C, 0x020C, 0x01EC, 0x01CC, 0x01AC, 0x018C, 
+    0x0174, 0x0164, 0x0154, 0x0144, 0x0134, 0x0124, 0x0114, 0x0104, 0x00F4, 0x00E4, 0x00D4, 0x00C4, 0x00B4, 0x00A4, 0x0094, 0x0084, 
+    0x0078, 0x0070, 0x0068, 0x0060, 0x0058, 0x0050, 0x0048, 0x0040, 0x0038, 0x0030, 0x0028, 0x0020, 0x0018, 0x0010, 0x0008, 0x0000
+};
+
+static DRWAV_INLINE drwav_int16 drwav__alaw_to_s16(drwav_uint8 sampleIn)
+{
+    return (short)g_drwavAlawTable[sampleIn];
+}
+
+static DRWAV_INLINE drwav_int16 drwav__mulaw_to_s16(drwav_uint8 sampleIn)
+{
+    return (short)g_drwavMulawTable[sampleIn];
+}
+
+
+
+static void drwav__pcm_to_s16(drwav_int16* pOut, const unsigned char* pIn, size_t totalSampleCount, unsigned short bytesPerSample)
+{
+    // Special case for 8-bit sample data because it's treated as unsigned.
+    if (bytesPerSample == 1) {
+        drwav_u8_to_s16(pOut, pIn, totalSampleCount);
+        return;
+    }
+
+
+    // Slightly more optimal implementation for common formats.
+    if (bytesPerSample == 2) {
+        for (unsigned int i = 0; i < totalSampleCount; ++i) {
+           *pOut++ = ((drwav_int16*)pIn)[i];
+        }
+        return;
+    }
+    if (bytesPerSample == 3) {
+        drwav_s24_to_s16(pOut, pIn, totalSampleCount);
+        return;
+    }
+    if (bytesPerSample == 4) {
+        drwav_s32_to_s16(pOut, (const drwav_int32*)pIn, totalSampleCount);
+        return;
+    }
+
+
+    // Anything more than 64 bits per sample is not supported.
+    if (bytesPerSample > 8) {
+        drwav_zero_memory(pOut, totalSampleCount * sizeof(*pOut));
+        return;
+    }
+
+
+    // Generic, slow converter.
+    for (unsigned int i = 0; i < totalSampleCount; ++i) {
+        drwav_uint64 sample = 0;
+        unsigned int shift  = (8 - bytesPerSample) * 8;
+
+        unsigned int j;
+        for (j = 0; j < bytesPerSample && j < 8; j += 1) {
+            sample |= (drwav_uint64)(pIn[j]) << shift;
+            shift  += 8;
+        }
+
+        pIn += j;
+        *pOut++ = (drwav_int16)((drwav_int64)sample >> 48);
+    }
+}
+
+static void drwav__ieee_to_s16(drwav_int16* pOut, const unsigned char* pIn, size_t totalSampleCount, unsigned short bytesPerSample)
+{
+    if (bytesPerSample == 4) {
+        drwav_f32_to_s16(pOut, (float*)pIn, totalSampleCount);
+        return;
+    } else if (bytesPerSample == 8) {
+        drwav_f64_to_s16(pOut, (double*)pIn, totalSampleCount);
+        return;
+    } else {
+        // Only supporting 32- and 64-bit float. Output silence in all other cases. Contributions welcome for 16-bit float.
+        drwav_zero_memory(pOut, totalSampleCount * sizeof(*pOut));
+        return;
+    }
+}
+
+drwav_uint64 drwav_read_s16__pcm(drwav* pWav, drwav_uint64 samplesToRead, drwav_int16* pBufferOut)
+{
+    // Fast path.
+    if (pWav->bytesPerSample == 2) {
+        return drwav_read(pWav, samplesToRead, pBufferOut);
+    }
+
+    drwav_uint64 totalSamplesRead = 0;
+    unsigned char sampleData[4096];
+    while (samplesToRead > 0) {
+        drwav_uint64 samplesRead = drwav_read(pWav, drwav_min(samplesToRead, sizeof(sampleData)/pWav->bytesPerSample), sampleData);
+        if (samplesRead == 0) {
+            break;
+        }
+
+        drwav__pcm_to_s16(pBufferOut, sampleData, (size_t)samplesRead, pWav->bytesPerSample);
+
+        pBufferOut       += samplesRead;
+        samplesToRead    -= samplesRead;
+        totalSamplesRead += samplesRead;
+    }
+
+    return totalSamplesRead;
+}
+
 drwav_uint64 drwav_read_s16__ieee(drwav* pWav, drwav_uint64 samplesToRead, drwav_int16* pBufferOut)
 {
     drwav_uint64 totalSamplesRead = 0;
@@ -2529,17 +2554,27 @@ static void drwav__pcm_to_f32(float* pOut, const unsigned char* pIn, size_t samp
         return;
     }
 
+
+    // Anything more than 64 bits per sample is not supported.
+    if (bytesPerSample > 8) {
+        drwav_zero_memory(pOut, sampleCount * sizeof(*pOut));
+        return;
+    }
+
+
     // Generic, slow converter.
     for (unsigned int i = 0; i < sampleCount; ++i) {
-        unsigned int sample = 0;
+        drwav_uint64 sample = 0;
         unsigned int shift  = (8 - bytesPerSample) * 8;
-        for (unsigned short j = 0; j < bytesPerSample && j < 4; ++j) {
-            sample |= (unsigned int)(pIn[j]) << shift;
+
+        unsigned int j;
+        for (j = 0; j < bytesPerSample && j < 8; j += 1) {
+            sample |= (drwav_uint64)(pIn[j]) << shift;
             shift  += 8;
         }
 
-        pIn += bytesPerSample;
-        *pOut++ = (float)((int)sample / 2147483648.0);
+        pIn += j;
+        *pOut++ = (float)((drwav_int64)sample / 9223372036854775807.0);
     }
 }
 
@@ -2550,15 +2585,23 @@ static void drwav__ieee_to_f32(float* pOut, const unsigned char* pIn, size_t sam
             *pOut++ = ((float*)pIn)[i];
         }
         return;
-    } else {
+    } else if (bytesPerSample == 8) {
         drwav_f64_to_f32(pOut, (double*)pIn, sampleCount);
         return;
+    } else {
+        // Only supporting 32- and 64-bit float. Output silence in all other cases. Contributions welcome for 16-bit float.
+        drwav_zero_memory(pOut, sampleCount * sizeof(*pOut));
+        return;
     }
 }
 
 
 drwav_uint64 drwav_read_f32__pcm(drwav* pWav, drwav_uint64 samplesToRead, float* pBufferOut)
 {
+    if (pWav->bytesPerSample == 0) {
+        return 0;
+    }
+
     drwav_uint64 totalSamplesRead = 0;
     unsigned char sampleData[4096];
     while (samplesToRead > 0) {
@@ -2628,6 +2671,10 @@ drwav_uint64 drwav_read_f32__ieee(drwav* pWav, drwav_uint64 samplesToRead, float
         return drwav_read(pWav, samplesToRead, pBufferOut);
     }
 
+    if (pWav->bytesPerSample == 0) {
+        return 0;
+    }
+
     drwav_uint64 totalSamplesRead = 0;
     unsigned char sampleData[4096];
     while (samplesToRead > 0) {
@@ -2648,6 +2695,10 @@ drwav_uint64 drwav_read_f32__ieee(drwav* pWav, drwav_uint64 samplesToRead, float
 
 drwav_uint64 drwav_read_f32__alaw(drwav* pWav, drwav_uint64 samplesToRead, float* pBufferOut)
 {
+    if (pWav->bytesPerSample == 0) {
+        return 0;
+    }
+
     drwav_uint64 totalSamplesRead = 0;
     unsigned char sampleData[4096];
     while (samplesToRead > 0) {
@@ -2668,6 +2719,10 @@ drwav_uint64 drwav_read_f32__alaw(drwav* pWav, drwav_uint64 samplesToRead, float
 
 drwav_uint64 drwav_read_f32__mulaw(drwav* pWav, drwav_uint64 samplesToRead, float* pBufferOut)
 {
+    if (pWav->bytesPerSample == 0) {
+        return 0;
+    }
+
     drwav_uint64 totalSamplesRead = 0;
     unsigned char sampleData[4096];
     while (samplesToRead > 0) {
@@ -2842,17 +2897,27 @@ static void drwav__pcm_to_s32(drwav_int32* pOut, const unsigned char* pIn, size_
         return;
     }
 
+
+    // Anything more than 64 bits per sample is not supported.
+    if (bytesPerSample > 8) {
+        drwav_zero_memory(pOut, totalSampleCount * sizeof(*pOut));
+        return;
+    }
+
+
     // Generic, slow converter.
     for (unsigned int i = 0; i < totalSampleCount; ++i) {
-        unsigned int sample = 0;
+        drwav_uint64 sample = 0;
         unsigned int shift  = (8 - bytesPerSample) * 8;
-        for (unsigned short j = 0; j < bytesPerSample && j < 4; ++j) {
-            sample |= (unsigned int)(pIn[j]) << shift;
+
+        unsigned int j;
+        for (j = 0; j < bytesPerSample && j < 8; j += 1) {
+            sample |= (drwav_uint64)(pIn[j]) << shift;
             shift  += 8;
         }
 
-        pIn += bytesPerSample;
-        *pOut++ = sample;
+        pIn += j;
+        *pOut++ = (drwav_int32)((drwav_int64)sample >> 32);
     }
 }
 
@@ -2861,9 +2926,13 @@ static void drwav__ieee_to_s32(drwav_int32* pOut, const unsigned char* pIn, size
     if (bytesPerSample == 4) {
         drwav_f32_to_s32(pOut, (float*)pIn, totalSampleCount);
         return;
-    } else {
+    } else if (bytesPerSample == 8) {
         drwav_f64_to_s32(pOut, (double*)pIn, totalSampleCount);
         return;
+    } else {
+        // Only supporting 32- and 64-bit float. Output silence in all other cases. Contributions welcome for 16-bit float.
+        drwav_zero_memory(pOut, totalSampleCount * sizeof(*pOut));
+        return;
     }
 }
 
@@ -2875,6 +2944,10 @@ drwav_uint64 drwav_read_s32__pcm(drwav* pWav, drwav_uint64 samplesToRead, drwav_
         return drwav_read(pWav, samplesToRead, pBufferOut);
     }
 
+    if (pWav->bytesPerSample == 0) {
+        return 0;
+    }
+
     drwav_uint64 totalSamplesRead = 0;
     unsigned char sampleData[4096];
     while (samplesToRead > 0) {
@@ -2939,6 +3012,10 @@ drwav_uint64 drwav_read_s32__ima(drwav* pWav, drwav_uint64 samplesToRead, drwav_
 
 drwav_uint64 drwav_read_s32__ieee(drwav* pWav, drwav_uint64 samplesToRead, drwav_int32* pBufferOut)
 {
+    if (pWav->bytesPerSample == 0) {
+        return 0;
+    }
+
     drwav_uint64 totalSamplesRead = 0;
     unsigned char sampleData[4096];
     while (samplesToRead > 0) {
@@ -2959,6 +3036,10 @@ drwav_uint64 drwav_read_s32__ieee(drwav* pWav, drwav_uint64 samplesToRead, drwav
 
 drwav_uint64 drwav_read_s32__alaw(drwav* pWav, drwav_uint64 samplesToRead, drwav_int32* pBufferOut)
 {
+    if (pWav->bytesPerSample == 0) {
+        return 0;
+    }
+
     drwav_uint64 totalSamplesRead = 0;
     unsigned char sampleData[4096];
     while (samplesToRead > 0) {
@@ -2979,6 +3060,10 @@ drwav_uint64 drwav_read_s32__alaw(drwav* pWav, drwav_uint64 samplesToRead, drwav
 
 drwav_uint64 drwav_read_s32__mulaw(drwav* pWav, drwav_uint64 samplesToRead, drwav_int32* pBufferOut)
 {
+    if (pWav->bytesPerSample == 0) {
+        return 0;
+    }
+
     drwav_uint64 totalSamplesRead = 0;
     unsigned char sampleData[4096];
     while (samplesToRead > 0) {
@@ -3354,6 +3439,25 @@ void drwav_free(void* pDataReturnedByOpenAndRead)
 
 // REVISION HISTORY
 //
+// v0.7f - 2018-02-05
+//   - Restrict ADPCM formats to a maximum of 2 channels.
+//
+// v0.7e - 2018-02-02
+//   - Fix a crash.
+//
+// v0.7d - 2018-02-01
+//   - Fix a crash.
+//
+// v0.7c - 2018-02-01
+//   - Set drwav.bytesPerSample to 0 for all compressed formats.
+//   - Fix a crash when reading 16-bit floating point WAV files. In this case dr_wav will output silence for
+//     all format conversion reading APIs (*_s16, *_s32, *_f32 APIs).
+//   - Fix some divide-by-zero errors.
+//
+// v0.7b - 2018-01-22
+//   - Fix errors with seeking of compressed formats.
+//   - Fix compilation error when DR_WAV_NO_CONVERSION_API
+//
 // v0.7a - 2017-11-17
 //   - Fix some GCC warnings.
 //
@@ -3393,7 +3497,7 @@ void drwav_free(void* pDataReturnedByOpenAndRead)
 //
 // v0.5 - 2016-09-29
 //   - API CHANGE. Swap the order of "channels" and "sampleRate" parameters in drwav_open_and_read*(). Rationale for this is to
-//     keep it consistent with dr_audio and drwav_flac.
+//     keep it consistent with dr_audio and dr_flac.
 //
 // v0.4b - 2016-09-18
 //   - Fixed a typo in documentation.
@@ -3403,8 +3507,8 @@ void drwav_free(void* pDataReturnedByOpenAndRead)
 //   - Change date format to ISO 8601 (YYYY-MM-DD)
 //
 // v0.4 - 2016-07-13
-//   - API CHANGE. Make onSeek consistent with drwav_flac.
-//   - API CHANGE. Rename drwav_seek() to drwav_seek_to_sample() for clarity and consistency with drwav_flac.
+//   - API CHANGE. Make onSeek consistent with dr_flac.
+//   - API CHANGE. Rename drwav_seek() to drwav_seek_to_sample() for clarity and consistency with dr_flac.
 //   - Added support for Sony Wave64.
 //
 // v0.3a - 2016-05-28
@@ -3418,7 +3522,7 @@ void drwav_free(void* pDataReturnedByOpenAndRead)
 //   - Fixed Linux/GCC build.
 //
 // v0.2 - 2016-05-11
-//   - Added support for reading data as signed 32-bit PCM for consistency with drwav_flac.
+//   - Added support for reading data as signed 32-bit PCM for consistency with dr_flac.
 //
 // v0.1a - 2016-05-07
 //   - Fixed a bug in drwav_open_file() where the file handle would not be closed if the loader failed to initialize.