decode works but eventually dies with AAXGetEncodedAudio: -24

py_aax_decode/native.py

@@ -23,9 +23,8 @@ def main(in_file, out_file, dll_path=None):
     if dll_path is None:
         dll_path = 'C:/Program Files (x86)/Audible/Bin/AAXSDKWin.dll'
 
-    print(dll_path)
     dll = ctypes.CDLL(dll_path)
-
+	
     handle = open_file(dll, in_file)
 
     a = (dll, handle)
@@ -34,6 +33,8 @@ def main(in_file, out_file, dll_path=None):
     seek(*a, 0)
     authenticate(*a)
 
+    print('c', channels, 's', sample_rate)
+	
     enc_buf = ctypes.create_string_buffer(0x400)
     dec_buf = ctypes.create_string_buffer(0x400 * 200)
 
@@ -41,6 +42,7 @@ def main(in_file, out_file, dll_path=None):
     with wave.open(out_file, 'wb') as wav:
         wav.setnchannels(channels)
         wav.setframerate(sample_rate)
+        wav.setsampwidth(2)
 
         while True:
             enc_data, enc_len = get_encoded_audio(*a, enc_buf)
@@ -51,7 +53,7 @@ def main(in_file, out_file, dll_path=None):
             dec_data, dec_len = decode_pcm_frame(*a, enc_buf, enc_len, dec_buf)
             length += dec_len
 
-            wav.writeframes(dec_buf)
+            wav.writeframes(bytearray(dec_buf)[:dec_len])
 
     close_file(*a)
 
@@ -80,7 +82,7 @@ def get_audio_channel_count(dll, handle):
     if res != 0:
         raise Exception('AAXGetAudioChannelCount: {}'.format(res))
 
-    return n_channels
+    return n_channels.value
 
 
 def get_sample_rate(dll, handle):
@@ -90,7 +92,7 @@ def get_sample_rate(dll, handle):
     if res != 0:
         raise Exception('AAXGetSampleRate: {}'.format(res))
 
-    return sample_rate
+    return sample_rate.value
 
 
 def seek(dll, handle, position=0):
@@ -117,7 +119,7 @@ def get_encoded_audio(dll, handle, buf=None):
     if res != 0:
         raise Exception('AAXGetEncodedAudio: {}'.format(res))
 
-    return buf, data_len
+    return buf, data_len.value
 
 
 def decode_pcm_frame(dll, handle, in_buf, in_len, out_buf=None):
@@ -125,12 +127,12 @@ def decode_pcm_frame(dll, handle, in_buf, in_len, out_buf=None):
         out_buf = ctypes.create_string_buffer(0x400 * 200)
 
     data_len = ctypes.c_uint()
-    res = dll.AAXDecodedPCMFrame(handle, in_buf, in_len, out_buf, len(out_buf), byref(data_len))
+    res = dll.AAXDecodePCMFrame(handle, in_buf, in_len, out_buf, len(out_buf), byref(data_len))
 
     if res != 0:
         raise Exception('AAXDecodedPCMFrame: {}'.format(res))
 
-    return out_buf, data_len
+    return out_buf, data_len.value
 
 
 def get_chapter_text(dll, handle, chapter_num, buf=None):
@@ -143,7 +145,7 @@ def get_chapter_text(dll, handle, chapter_num, buf=None):
     if res != 0:
         raise Exception('AAXGetChapterText: {}'.format(res))
 
-    return buf, data_len
+    return buf, data_len.value
 
 
 def get_metadata(dll, handle, mdn):
@@ -159,7 +161,7 @@ def get_metadata(dll, handle, mdn):
     if res != 0:
         raise Exception('AAXGetChapterText: {}'.format(res))
 
-    return buf, data_len
+    return buf, data_len.value
 
 
 def seek_to_chapter(dll, handle, chapter):
@@ -176,7 +178,7 @@ def get_chapter_count(dll, handle):
     if res != 0:
         raise Exception('AAXGetChapterCount: {}'.format(res))
 
-    return n_chapters
+    return n_chapters.value
 
 
 def get_current_chapter(dll, handle):
@@ -186,7 +188,7 @@ def get_current_chapter(dll, handle):
     if res != 0:
         raise Exception('AAXGetCurrentChapter: {}'.format(res))
 
-    return chapter
+    return chapter.value
 
 
 def get_duration(dll, handle):
@@ -196,7 +198,7 @@ def get_duration(dll, handle):
     if res != 0:
         raise Exception('AAXGetDuration: {}'.format(res))
 
-    return duration
+    return duration.value
 
 
 def get_playback_position(dll, handle):
@@ -206,7 +208,7 @@ def get_playback_position(dll, handle):
     if res != 0:
         raise Exception('AAXGetPlaybackPosition: {}'.format(res))
 
-    return position
+    return position.value
 
 
 def get_chapter_start_time(dll, handle, chapter):
@@ -216,7 +218,7 @@ def get_chapter_start_time(dll, handle, chapter):
     if res != 0:
         raise Exception('AAXGetChapterStartTime: {}'.format(res))
 
-    return position
+    return position.value
 
 
 def get_avg_bitrate(dll, handle):
@@ -226,7 +228,7 @@ def get_avg_bitrate(dll, handle):
     if res != 0:
         raise Exception('AAXGetAvgBitrate: {}'.format(res))
 
-    return bitrate
+    return bitrate.value
 
 
 def get_max_bitrate(dll, handle):
@@ -236,5 +238,5 @@ def get_max_bitrate(dll, handle):
     if res != 0:
         raise Exception('AAXGetAvgBitrate: {}'.format(res))
 
-    return bitrate
+    return bitrate.value