audio/mp3: Remove all exports to C

audio/mp3/decode_notjs.go

@@ -124,19 +124,18 @@ func getBytes(buf []int) (int, error) {
 	return len(buf), nil
 }
 
-//export Get_Filepos
-func Get_Filepos() C.unsigned {
+func getFilepos() int {
 	if len(readerCache) == 0 && readerEOF {
 		return eof
 	}
-	return C.unsigned(readerPos)
+	return readerPos
 }
 
 func decode(r io.Reader, w io.Writer) error {
 	// TODO: Decoder should know number of channels
 	reader = r
 	writer = w
-	for Get_Filepos() != eof {
+	for getFilepos() != eof {
 		err := readFrame()
 		if err == nil {
 			if err := decodeL3(); err != nil {
@@ -144,7 +143,7 @@ func decode(r io.Reader, w io.Writer) error {
 			}
 			continue
 		}
-		if Get_Filepos() == eof {
+		if getFilepos() == eof {
 			break
 		}
 		return err

audio/mp3/maindata.go

@@ -71,7 +71,7 @@ func readMainL3() error {
 	}
 	for gr := 0; gr < 2; gr++ {
 		for ch := 0; ch < nch; ch++ {
-			part_2_start := int(Get_Main_Pos())
+			part_2_start := getMainPos()
 			/* Number of bits in the bitstream for the bands */
 			slen1 := mpeg1_scalefac_sizes[C.g_side_info.scalefac_compress[gr][ch]][0]
 			slen2 := mpeg1_scalefac_sizes[C.g_side_info.scalefac_compress[gr][ch]][1]
@@ -270,18 +270,15 @@ func getMainBits(num int) int {
 	return int(tmp)
 }
 
-//export Get_Main_Pos
-func Get_Main_Pos() C.unsigned {
+func getMainPos() int {
 	pos := theMainDataBytes.pos
 	pos *= 8                    /* Multiply by 8 to get number of bits */
 	pos += theMainDataBytes.idx /* Add current bit index */
-	return C.unsigned(pos)
+	return pos
 }
 
-//export Set_Main_Pos
-func Set_Main_Pos(bit_pos C.unsigned) C.int {
+func setMainPos(bit_pos int) {
 	theMainDataBytes.ptr = theMainDataBytes.vec[bit_pos>>3:]
 	theMainDataBytes.pos = int(bit_pos) >> 3
 	theMainDataBytes.idx = int(bit_pos) & 0x7
-	return C.OK
 }

audio/mp3/pdmp3.h

@@ -84,9 +84,4 @@ typedef struct { /* Scale factor band indices,for long and short windows */
 }
 t_sf_band_indices;
 
-unsigned Get_Filepos(void);
-
-unsigned Get_Main_Pos(void);
-int Set_Main_Pos(unsigned bit_pos);
-
 #endif

audio/mp3/read.go

@@ -148,23 +148,23 @@ func readHeader() error {
 	/* Check for invalid values and impossible combinations */
 	if C.g_frame_header.id != 3 {
 		return fmt.Errorf("mp3: ID must be 3\nHeader word is 0x%08x at file pos %d",
-			header, C.Get_Filepos())
+			header, getFilepos())
 	}
 	if C.g_frame_header.bitrate_index == 0 {
 		return fmt.Errorf("mp3: Free bitrate format NIY!\nHeader word is 0x%08x at file pos %d",
-			header, Get_Filepos())
+			header, getFilepos())
 	}
 	if C.g_frame_header.bitrate_index == 15 {
 		return fmt.Errorf("mp3: bitrate_index = 15 is invalid!\nHeader word is 0x%08x at file pos %d",
-			header, Get_Filepos())
+			header, getFilepos())
 	}
 	if C.g_frame_header.sampling_frequency == 3 {
 		return fmt.Errorf("mp3: sampling_frequency = 3 is invalid! Header word is 0x%08x at file pos %d",
-			header, Get_Filepos())
+			header, getFilepos())
 	}
 	if C.g_frame_header.layer == 0 {
 		return fmt.Errorf("mp3: layer = 0 is invalid! Header word is 0x%08x at file pos %d",
-			header, Get_Filepos())
+			header, getFilepos())
 	}
 	C.g_frame_header.layer = 4 - C.g_frame_header.layer
 	return nil
@@ -217,7 +217,7 @@ func readHuffman(part_2_start, gr, ch int) error {
 	/* Read small values until is_pos = 576 or we run out of huffman data */
 	table_num := int(C.g_side_info.count1table_select[gr][ch]) + 32
 	is_pos := int(C.g_side_info.big_values[gr][ch]) * 2
-	for ; (is_pos <= 572) && (int(Get_Main_Pos()) <= bit_pos_end); is_pos++ {
+	for ; (is_pos <= 572) && (getMainPos() <= bit_pos_end); is_pos++ {
 		/* Get next Huffman coded words */
 		x, y, v, w, err := huffmanDecode(table_num)
 		if err != nil {
@@ -241,7 +241,7 @@ func readHuffman(part_2_start, gr, ch int) error {
 		C.g_main_data.is[gr][ch][is_pos] = C.float(y)
 	}
 	/* Check that we didn't read past the end of this section */
-	if int(C.Get_Main_Pos()) > (bit_pos_end + 1) {
+	if getMainPos() > (bit_pos_end + 1) {
 		/* Remove last words read */
 		is_pos -= 4
 	}
@@ -252,6 +252,6 @@ func readHuffman(part_2_start, gr, ch int) error {
 		C.g_main_data.is[gr][ch][is_pos] = 0.0
 	}
 	/* Set the bitpos to point to the next part to read */
-	C.Set_Main_Pos(C.unsigned(bit_pos_end) + 1)
+	setMainPos(bit_pos_end + 1)
 	return nil
 }

audio/mp3/sideinfo.go

@@ -149,7 +149,7 @@ func getSideinfo(size int) error {
 			return fmt.Errorf("mp3: unexpected EOF at getSideinfo")
 		}
 		return fmt.Errorf("mp3: couldn't read sideinfo %d bytes at pos %d: %v",
-			size, Get_Filepos(), err)
+			size, getFilepos(), err)
 	}
 	theSideInfo.vec = buf[:n]
 	theSideInfo.idx = 0