Improve return values for fallbacks.

stepmania/src/RageSoundReader_MP3.cpp

@@ -558,7 +558,7 @@ RageSoundReader_MP3::~RageSoundReader_MP3()
 	delete mad;
 }
 
-bool RageSoundReader_MP3::Open( CString filename_ )
+SoundReader_FileReader::OpenResult RageSoundReader_MP3::Open( CString filename_ )
 {
 	filename = filename_;
     rw = fopen(filename, "rb");
@@ -589,13 +589,13 @@ bool RageSoundReader_MP3::Open( CString filename_ )
 	if( ret == 0 )
 	{
 		SetError( "Failed to read any data at all" );
-		return false;
+		return OPEN_NO_MATCH;
 	}
 	if( ret == -1 )
 	{
 		/* XXX: an error is already set */
 		SetError( "Not an MP3 stream?" );
-		return false;
+		return OPEN_NO_MATCH;
 	}
 
 	LOG->Trace("Accepting MP3 stream.");
@@ -620,7 +620,7 @@ bool RageSoundReader_MP3::Open( CString filename_ )
 
 	SampleRate = mad->Frame.header.samplerate;
 	this->Channels = mad->Frame.header.mode == MAD_MODE_SINGLE_CHANNEL? 1:2;
-	return 1;
+	return OPEN_OK;
 }
 
 /* dst and src are buffers of 16-bit samples.  len is the number of bytes

stepmania/src/RageSoundReader_MP3.h

@@ -31,7 +31,7 @@ public:
 	int GetLengthInternal( bool fast );
 
 public:
-	bool Open(CString filename);
+	OpenResult Open(CString filename);
 	void Close();
 	int GetLength() const { return ((RageSoundReader_MP3*)this)->GetLengthInternal(false); }
 	int GetLength_Fast() const { return ((RageSoundReader_MP3*)this)->GetLengthInternal(true); }

stepmania/src/RageSoundReader_Vorbisfile.cpp

@@ -42,6 +42,7 @@ static CString ov_ssprintf( int err, const char *fmt, ...)
 	CString errstr;
 	switch( err )
 	{
+	/* XXX: In the case of OV_EREAD, can we snoop at errno? */
 	case OV_EREAD:		errstr = "Read error"; break;
 	case OV_EFAULT:		errstr = "Internal error"; break;
 	case OV_EIMPL:		errstr = "Feature not implemented"; break;
@@ -59,7 +60,7 @@ static CString ov_ssprintf( int err, const char *fmt, ...)
 	return s + ssprintf( " (%s)", errstr.c_str() );
 }
 
-bool RageSoundReader_Vorbisfile::Open(CString filename_)
+SoundReader_FileReader::OpenResult RageSoundReader_Vorbisfile::Open(CString filename_)
 {
 	filename=filename_;
 
@@ -68,7 +69,7 @@ bool RageSoundReader_Vorbisfile::Open(CString filename_)
 	if(f == NULL)
 	{
 		SetError(ssprintf("ogg fopen(%s) failed: %s", filename.c_str(), strerror(errno)));
-		return false;
+		return OPEN_MATCH_BUT_FAIL;
 	}
 
 	int ret = ov_open(f, vf, NULL, 0);
@@ -76,12 +77,19 @@ bool RageSoundReader_Vorbisfile::Open(CString filename_)
 	{
 		SetError( ov_ssprintf(ret, "ov_open failed") );
 		fclose(f);
-		return false;
+		switch( ret )
+		{
+		case OV_EREAD:
+		case OV_ENOTVORBIS:
+			return OPEN_MATCH_BUT_FAIL;
+		default:
+			return OPEN_NO_MATCH;
+		}
 	}
 
 	avail = 0;
 
-    return true;
+    return OPEN_OK;
 }
 
 int RageSoundReader_Vorbisfile::GetLength() const

stepmania/src/RageSoundReader_Vorbisfile.h

@@ -13,7 +13,7 @@ class RageSoundReader_Vorbisfile: public SoundReader_FileReader {
 	CString filename;
 
 public:
-	bool Open(CString filename);
+	OpenResult Open(CString filename);
 	int GetLength() const;
 	int GetLength_Fast() const;
 	int SetPosition_Accurate(int ms)  { return SetPosition(ms, true); }

stepmania/src/RageSoundReader_WAV.cpp

@@ -439,13 +439,13 @@ int RageSoundReader_WAV::find_chunk( Uint32 id, Sint32 &size )
 }
 
 
-bool RageSoundReader_WAV::WAV_open_internal()
+SoundReader_FileReader::OpenResult RageSoundReader_WAV::WAV_open_internal()
 {
 	Uint32 magic1;
 	if( !read_le32(rw, &magic1) || magic1 != riffID )
 	{
 		SetError( "WAV: Not a RIFF file." );
-		return false;
+		return OPEN_NO_MATCH;
 	}
 
 	Uint32 ignore;
@@ -455,18 +455,29 @@ bool RageSoundReader_WAV::WAV_open_internal()
 	if( !read_le32( rw, &magic2 ) || magic2 != waveID )
 	{
 		SetError( "Not a WAVE file." );
-		return false;
+		return OPEN_NO_MATCH;
 	}
 
 	Sint32 NextChunk;
-    BAIL_IF_MACRO(!find_chunk(fmtID, NextChunk), "No format chunk.", false);
+    BAIL_IF_MACRO(!find_chunk(fmtID, NextChunk), "No format chunk.", OPEN_MATCH_BUT_FAIL);
 	NextChunk += ftell(rw);
-    BAIL_IF_MACRO(!read_fmt_chunk(), "Can't read format chunk.", false);
+    BAIL_IF_MACRO(!read_fmt_chunk(), "Can't read format chunk.", OPEN_MATCH_BUT_FAIL);
 
 	/* I think multi-channel WAVs are possible, but I've never even seen one. */
     Channels = (Uint8) fmt.wChannels;
 	ASSERT( Channels <= 2 );
 
+	if( fmt.wFormatTag != FMT_NORMAL &&
+		fmt.wFormatTag != FMT_ADPCM )
+	{
+		SetError( ssprintf("Unsupported WAV format %i", fmt.wFormatTag) );
+
+		/* It might be MP3 data in a WAV.  (Why do people *do* that?)  It's possible
+		 * that the MAD decoder will figure that out, so let's return OPEN_NO_MATCH
+		 * and keep searching for a decoder. */
+		return OPEN_NO_MATCH;
+	}
+
     if ( fmt.wBitsPerSample == 4 && this->fmt.wFormatTag == FMT_ADPCM )
 	{
 		Conversion = CONV_NONE;
@@ -485,7 +496,7 @@ bool RageSoundReader_WAV::WAV_open_internal()
     else
     {
 		SetError( ssprintf("Unsupported sample size %i", fmt.wBitsPerSample) );
-		return false;
+		return OPEN_MATCH_BUT_FAIL;
     }
 
 	if( Conversion == CONV_8BIT_TO_16BIT )
@@ -496,16 +507,16 @@ bool RageSoundReader_WAV::WAV_open_internal()
 	fseek(rw, NextChunk, SEEK_SET );
 
 	Sint32 DataSize;
-    BAIL_IF_MACRO(!find_chunk(dataID, DataSize), "No data chunk.", false);
+    BAIL_IF_MACRO(!find_chunk(dataID, DataSize), "No data chunk.", OPEN_MATCH_BUT_FAIL);
 
     fmt.data_starting_offset = ftell(rw);
     fmt.adpcm_sample_frame_size = BytesPerSample * Channels;
 
-    return true;
+    return OPEN_OK;
 }
 
 
-bool RageSoundReader_WAV::Open( CString filename_ )
+SoundReader_FileReader::OpenResult RageSoundReader_WAV::Open( CString filename_ )
 {
 	Close();
 	Input_Buffer_Ratio = 1;
@@ -514,8 +525,8 @@ bool RageSoundReader_WAV::Open( CString filename_ )
 
     memset(&fmt, 0, sizeof(fmt));
 
-    bool rc = WAV_open_internal();
-    if (!rc)
+    SoundReader_FileReader::OpenResult rc = WAV_open_internal();
+    if ( rc != OPEN_OK )
 		Close();
 
     return rc;

stepmania/src/RageSoundReader_WAV.h

@@ -69,7 +69,7 @@ class RageSoundReader_WAV: public SoundReader_FileReader
 	int seek_sample_fmt_normal( Uint32 ms );
 	int get_length_fmt_normal() const;
 
-	bool WAV_open_internal();
+	OpenResult WAV_open_internal();
 
 	int SetPosition(int ms);
 
@@ -79,7 +79,7 @@ class RageSoundReader_WAV: public SoundReader_FileReader
 	Uint32 ConvertBytePosToMs(int BytesPerSample, int channels, Uint32 pos) const;
 
 public:
-	bool Open(CString filename);
+	OpenResult Open(CString filename);
 	void Close();
 	int GetLength() const;
 	int GetLength_Fast() const { return GetLength(); }