WIP tta plugin

1 files changed, 711 insertions, 0 deletions

diff --git a/plugins/tta/ttadec.c b/plugins/tta/ttadec.c
new file mode 100644
index 00000000..c843e08f
--- /dev/null
+++ b/plugins/tta/ttadec.c
@@ -0,0 +1,711 @@
+/*
+ * ttadec.c
+ *
+ * Description:	 TTAv1 decoder library for HW players
+ * Developed by: Alexander Djourik <ald@true-audio.com>
+ *               Pavel Zhilin <pzh@true-audio.com>
+ *
+ * Copyright (c) 2004 True Audio Software. All rights reserved.
+ *
+ */
+
+/*
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the True Audio Software nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "ttalib.h"
+#include "ttadec.h"
+#include "filter.h"
+
+/******************* static variables and structures *******************/
+
+static unsigned char isobuffers[ISO_BUFFERS_SIZE + 4];
+static unsigned char *iso_buffers_end = isobuffers + ISO_BUFFERS_SIZE;
+static unsigned int pcm_buffer_size;
+
+static decoder	tta[MAX_NCH];	// decoder state
+static int	cache[MAX_NCH];	// decoder cache
+
+tta_info *ttainfo;		// currently playing file info
+
+static unsigned int fframes;	// number of frames in file
+static unsigned int framelen;	// the frame length in samples
+static unsigned int lastlen;	// the length of the last frame in samples
+static unsigned int data_pos;	// currently playing frame index
+static unsigned int data_cur;	// the playing position in frame
+
+static int maxvalue;		// output data max value
+static unsigned int *seek_table;	// the playing position table
+static unsigned int st_state;	//seek table status
+
+static unsigned int frame_crc32;
+static unsigned int bit_count;
+static unsigned int bit_cache;
+static unsigned char *bitpos;
+
+static int read_id3_tags (tta_info *info);
+
+/************************* crc32 functions *****************************/
+
+#define UPDATE_CRC32(x, crc) crc = \
+	(((crc>>8) & 0x00FFFFFF) ^ crc32_table[(crc^x) & 0xFF])
+
+static unsigned int 
+crc32 (unsigned char *buffer, unsigned int len) {
+	unsigned int i;
+	unsigned int crc = 0xFFFFFFFF;
+
+	for (i = 0; i < len; i++) UPDATE_CRC32(buffer[i], crc);
+
+	return (crc ^ 0xFFFFFFFF);
+}
+
+/************************* bit operations ******************************/
+
+#define GET_BINARY(value, bits) \
+	while (bit_count < bits) { \
+		if (bitpos == iso_buffers_end) { \
+			if (!fread(isobuffers, 1, \
+			    ISO_BUFFERS_SIZE, ttainfo->HANDLE)) { \
+			    ttainfo->STATE = READ_ERROR; \
+			    return -1; } \
+			bitpos = isobuffers; } \
+		UPDATE_CRC32(*bitpos, frame_crc32); \
+		bit_cache |= *bitpos << bit_count; \
+		bit_count += 8; \
+		bitpos++; } \
+	value = bit_cache & bit_mask[bits]; \
+	bit_cache >>= bits; \
+	bit_count -= bits; \
+	bit_cache &= bit_mask[bit_count];
+
+#define GET_UNARY(value) \
+	value = 0; \
+	while (!(bit_cache ^ bit_mask[bit_count])) { \
+		if (bitpos == iso_buffers_end) { \
+			if (!fread(isobuffers, 1, \
+			    ISO_BUFFERS_SIZE, ttainfo->HANDLE)) { \
+			    ttainfo->STATE = READ_ERROR; \
+			    return -1; } \
+			bitpos = isobuffers; } \
+		value += bit_count; \
+		bit_cache = *bitpos++; \
+		UPDATE_CRC32(bit_cache, frame_crc32); \
+		bit_count = 8; } \
+	while (bit_cache & 1) { \
+		value++; \
+		bit_cache >>= 1; \
+		bit_count--; } \
+	bit_cache >>= 1; \
+	bit_count--;
+
+static void init_buffer_read() {
+	frame_crc32 = 0xFFFFFFFFUL;
+	bit_count = bit_cache = 0;
+	bitpos = iso_buffers_end;
+}
+
+static int done_buffer_read() {
+	unsigned int crc32, rbytes;
+
+	frame_crc32 ^= 0xFFFFFFFFUL;
+	rbytes = iso_buffers_end - bitpos;
+
+	if (rbytes < sizeof(int)) {
+	    memcpy(isobuffers, bitpos, 4);
+	    if (!fread(isobuffers + rbytes, 1,
+		ISO_BUFFERS_SIZE - rbytes, ttainfo->HANDLE))
+		return -1;
+	    bitpos = isobuffers;
+	}
+
+	memcpy(&crc32, bitpos, 4);
+	crc32 = ENDSWAP_INT32(crc32);
+	bitpos += sizeof(int);
+    
+	if (crc32 != frame_crc32) return -1;
+
+	bit_cache = bit_count = 0;
+	frame_crc32 = 0xFFFFFFFFUL;
+
+	return 0;
+}
+
+/************************* decoder functions ****************************/
+
+const char *get_error_str (int error) {
+	switch (error) {
+	case NO_ERROR:      return "No errors found";
+	case OPEN_ERROR:    return "Can't open file";
+	case FORMAT_ERROR:  return "Not supported file format";
+	case FILE_ERROR:    return "File is corrupted";
+	case READ_ERROR:    return "Can't read from file";
+	case MEMORY_ERROR:  return "Insufficient memory available";
+	default:            return "Unknown error code";
+	}
+}
+
+int open_tta_file (const char *filename, tta_info *info, unsigned int data_offset) {
+	unsigned int checksum;
+	unsigned int datasize;
+	unsigned int origsize;
+	FILE *infile;
+	tta_hdr ttahdr;
+
+	// clear the memory
+	memset (info, 0, sizeof(tta_info));
+
+	// open file
+	infile = fopen(filename, "rb");
+	if (!infile) {
+		info->STATE = OPEN_ERROR;
+		return -1;
+	}
+	info->HANDLE = infile;
+
+	// get file size
+	fseek (infile, 0, SEEK_END);
+	info->FILESIZE = ftell (infile);
+	fseek (infile, 0, SEEK_SET);
+
+	// read id3 tags
+	if (!data_offset) {
+//		if ((data_offset = skip_id3_tag (info)) < 0) {
+		if ((data_offset = read_id3_tags (info)) < 0) {
+		    fclose(infile);
+		    return -1;
+		}
+	} else fseek (infile, data_offset, SEEK_SET);
+
+	// read TTA header
+	if (fread (&ttahdr, 1, sizeof (ttahdr), infile) == 0) {
+		fclose (infile);
+		info->STATE = READ_ERROR;
+		return -1;
+	}
+
+	// check for TTA3 signature
+	if (ENDSWAP_INT32(ttahdr.TTAid) != TTA1_SIGN) {
+		fclose (infile);
+		info->STATE = FORMAT_ERROR;
+		return -1;
+	}
+
+	ttahdr.CRC32 = ENDSWAP_INT32(ttahdr.CRC32);
+	checksum = crc32((unsigned char *) &ttahdr,
+	sizeof(tta_hdr) - sizeof(int));
+	if (checksum != ttahdr.CRC32) {
+		fclose (infile);
+		info->STATE = FILE_ERROR;
+		return -1;
+	}
+
+	ttahdr.AudioFormat = ENDSWAP_INT16(ttahdr.AudioFormat);
+	ttahdr.NumChannels = ENDSWAP_INT16(ttahdr.NumChannels);
+	ttahdr.BitsPerSample = ENDSWAP_INT16(ttahdr.BitsPerSample);
+	ttahdr.SampleRate = ENDSWAP_INT32(ttahdr.SampleRate);
+	ttahdr.DataLength = ENDSWAP_INT32(ttahdr.DataLength);
+
+	// check for player supported formats
+	if (ttahdr.AudioFormat != WAVE_FORMAT_PCM ||
+		ttahdr.NumChannels > MAX_NCH ||
+		ttahdr.BitsPerSample > MAX_BPS ||(
+		ttahdr.SampleRate != 16000 &&
+		ttahdr.SampleRate != 22050 &&
+		ttahdr.SampleRate != 24000 &&
+		ttahdr.SampleRate != 32000 &&
+		ttahdr.SampleRate != 44100 &&
+		ttahdr.SampleRate != 48000 &&
+		ttahdr.SampleRate != 64000 &&
+		ttahdr.SampleRate != 88200 &&
+		ttahdr.SampleRate != 96000)) {
+		fclose (infile);
+		info->STATE = FORMAT_ERROR;
+		return -1;
+	}
+
+	// fill the File Info
+	info->NCH = ttahdr.NumChannels;
+	info->BPS = ttahdr.BitsPerSample;
+	info->BSIZE = (ttahdr.BitsPerSample + 7)/8;
+	info->FORMAT = ttahdr.AudioFormat;
+	info->SAMPLERATE = ttahdr.SampleRate;
+	info->DATALENGTH = ttahdr.DataLength;
+	info->FRAMELEN = (int) (FRAME_TIME * ttahdr.SampleRate);
+	info->LENGTH = ttahdr.DataLength / ttahdr.SampleRate;
+	info->DATAPOS = data_offset;
+
+        datasize = info->FILESIZE - info->DATAPOS;
+        origsize = info->DATALENGTH * info->BSIZE * info->NCH;
+
+	info->COMPRESS = (double) datasize / origsize;
+	info->BITRATE = (int) (info->COMPRESS * info->SAMPLERATE *
+		info->NCH * info->BPS / 1000);
+
+	return 0;
+}
+
+static void rice_init(adapt *rice, unsigned int k0, unsigned int k1) {
+	rice->k0 = k0;
+	rice->k1 = k1;
+	rice->sum0 = shift_16[k0];
+	rice->sum1 = shift_16[k1];
+}
+
+static void decoder_init(decoder *tta, int nch, int byte_size) {
+	int shift = flt_set[byte_size - 1];
+	int i;
+
+	for (i = 0; i < nch; i++) {
+		filter_init(&tta[i].fst, shift);
+		rice_init(&tta[i].rice, 10, 10);
+		tta[i].last = 0;
+	}
+}
+
+static void seek_table_init (unsigned int *seek_table,
+	unsigned int len, unsigned int data_offset) {
+	unsigned int *st, frame_len;
+
+	for (st = seek_table; st < (seek_table + len); st++) {
+		frame_len = ENDSWAP_INT32(*st);
+		*st = data_offset;
+		data_offset += frame_len;
+	}
+}
+
+int set_position (unsigned int pos) {
+	unsigned int seek_pos;
+
+	if (pos >= fframes) return 0;
+	if (!st_state) {
+		ttainfo->STATE = FILE_ERROR;
+		return -1;
+	}
+
+	seek_pos = ttainfo->DATAPOS + seek_table[data_pos = pos];
+	if (fseek(ttainfo->HANDLE, seek_pos, SEEK_SET) < 0) {
+		ttainfo->STATE = READ_ERROR;
+		return -1;
+	}
+
+	data_cur = 0;
+	framelen = 0;
+
+	// init bit reader
+	init_buffer_read();
+
+	return 0;
+}
+
+int player_init (tta_info *info) {
+	unsigned int checksum;
+	unsigned int data_offset;
+	unsigned int st_size;
+
+	ttainfo = info;
+
+	framelen = 0;
+	data_pos = 0;
+	data_cur = 0;
+
+	lastlen = ttainfo->DATALENGTH % ttainfo->FRAMELEN;
+	fframes = ttainfo->DATALENGTH / ttainfo->FRAMELEN + (lastlen ? 1 : 0);
+	st_size = (fframes + 1) * sizeof(int);
+
+	seek_table = (unsigned int *) malloc(st_size);
+	if (!seek_table) {
+		ttainfo->STATE = MEMORY_ERROR;
+		return -1;
+	}
+
+	// read seek table
+	if (!fread(seek_table, st_size, 1, ttainfo->HANDLE)) {
+		ttainfo->STATE = READ_ERROR;
+		return -1;
+	}
+
+	checksum = crc32((unsigned char *) seek_table, st_size - sizeof(int));
+	st_state = (checksum == ENDSWAP_INT32(seek_table[fframes]));
+	data_offset = sizeof(tta_hdr) + st_size;
+
+	// init seek table
+	seek_table_init(seek_table, fframes, data_offset);
+
+	// init bit reader
+	init_buffer_read();
+
+	pcm_buffer_size = PCM_BUFFER_LENGTH * ttainfo->BSIZE * ttainfo->NCH;
+	maxvalue = (1UL << ttainfo->BPS) - 1;
+
+	return 0;
+}
+
+void close_tta_file (tta_info *info) {
+	if (info->HANDLE) {
+		fclose (info->HANDLE);
+		info->HANDLE = NULL;
+	}
+}
+
+void player_stop () {
+	if (seek_table) {
+		free(seek_table);
+		seek_table = NULL;
+	}
+}
+
+int get_samples (byte *buffer) {
+	unsigned int k, depth, unary, binary;
+	byte *p = buffer;
+	decoder *dec = tta;
+	int *prev = cache;
+	int value, res;
+
+	for (res = 0; p < buffer + pcm_buffer_size;) {
+		fltst *fst = &dec->fst;
+		adapt *rice = &dec->rice;
+		int *last = &dec->last;
+
+		if (data_cur == framelen) {
+			if (data_pos == fframes) break;
+			if (framelen && done_buffer_read()) {
+			    if (set_position(data_pos)) return -1;
+			    if (res) break;
+			}
+
+			if (data_pos == fframes - 1 && lastlen)
+				framelen = lastlen;
+			else framelen = ttainfo->FRAMELEN;
+
+			decoder_init(tta, ttainfo->NCH, ttainfo->BSIZE);
+			data_pos++; data_cur = 0;
+		}
+
+		// decode Rice unsigned
+		GET_UNARY(unary);
+
+		switch (unary) {
+		case 0: depth = 0; k = rice->k0; break;
+		default:
+			depth = 1; k = rice->k1;
+			unary--;
+		}
+
+		if (k) {
+			GET_BINARY(binary, k);
+			value = (unary << k) + binary;
+		} else value = unary;
+
+		switch (depth) {
+		case 1: 
+			rice->sum1 += value - (rice->sum1 >> 4);
+			if (rice->k1 > 0 && rice->sum1 < shift_16[rice->k1])
+				rice->k1--;
+			else if (rice->sum1 > shift_16[rice->k1 + 1])
+				rice->k1++;
+			value += bit_shift[rice->k0];
+		default:
+			rice->sum0 += value - (rice->sum0 >> 4);
+			if (rice->k0 > 0 && rice->sum0 < shift_16[rice->k0])
+				rice->k0--;
+			else if (rice->sum0 > shift_16[rice->k0 + 1])
+			rice->k0++;
+		}
+
+		value = DEC(value);
+
+		// decompress stage 1: adaptive hybrid filter
+		hybrid_filter(fst, &value);
+
+		// decompress stage 2: fixed order 1 prediction
+		switch (ttainfo->BSIZE) {
+		case 1: value += PREDICTOR1(*last, 4); break;	// bps 8
+		case 2: value += PREDICTOR1(*last, 5); break;	// bps 16
+		case 3: value += PREDICTOR1(*last, 5); break;	// bps 24
+		} *last = value;
+
+		// check for errors
+		if (abs(value) > maxvalue) {
+			unsigned int tail =
+				pcm_buffer_size / (ttainfo->BSIZE * ttainfo->NCH) - res;
+			memset(buffer, 0, pcm_buffer_size);
+			data_cur += tail; res += tail;
+			break;
+		}
+
+		if (dec < tta + (ttainfo->NCH - 1)) {
+			*prev++ = value; dec++;
+		} else {
+			*prev = value;
+			if (ttainfo->NCH > 1) {
+				int *r = prev - 1;
+				for (*prev += *r/2; r >= cache; r--)
+					*r = *(r + 1) - *r;
+				for (r = cache; r < prev; r++)
+					WRITE_BUFFER(r, ttainfo->BSIZE, p)
+			}
+			WRITE_BUFFER(prev, ttainfo->BSIZE, p)
+			prev = cache;
+			data_cur++; res++;
+			dec = tta;
+		}
+	}
+
+	return res;
+}
+
+/*
+ * Description:	 ID3 tags manipulation routines
+ *               Provides read access to ID3 tags v1.1, v2.3.x, v2.4.x
+ *               Supported ID3v2 frames: Title, Artist, Album, Track,
+ *               Year, Genre, Comment.
+ *
+ * Copyright (c) 2004 Alexander Djourik. All rights reserved.
+ *
+ */
+
+static unsigned int unpack_sint28 (const char *ptr) {
+	unsigned int value = 0;
+
+	if (ptr[0] & 0x80) return 0;
+
+	value =  value       | (ptr[0] & 0x7f);
+	value = (value << 7) | (ptr[1] & 0x7f);
+	value = (value << 7) | (ptr[2] & 0x7f);
+	value = (value << 7) | (ptr[3] & 0x7f);
+
+	return value;
+}
+
+static unsigned int unpack_sint32 (const char *ptr) {
+	unsigned int value = 0;
+
+	if (ptr[0] & 0x80) return 0;
+
+	value = (value << 8) | ptr[0];
+	value = (value << 8) | ptr[1];
+	value = (value << 8) | ptr[2];
+	value = (value << 8) | ptr[3];
+
+	return value;
+}
+
+static int get_frame_id (const char *id) {
+	if (!memcmp(id, "TIT2", 4)) return TIT2;	// Title
+	if (!memcmp(id, "TPE1", 4)) return TPE1;	// Artist
+	if (!memcmp(id, "TALB", 4)) return TALB;	// Album
+	if (!memcmp(id, "TRCK", 4)) return TRCK;	// Track
+	if (!memcmp(id, "TYER", 4)) return TYER;	// Year
+	if (!memcmp(id, "TCON", 4)) return TCON;	// Genre
+	if (!memcmp(id, "COMM", 4)) return COMM;	// Comment
+	return 0;
+}
+
+#if 0
+
+static int skip_id3_tag (tta_info *info) {
+	id3v2_tag id3v2;
+	int id3v2_size;
+
+	////////////////////////////////////////
+	// skip ID3v2 tag
+	if (!fread(&id3v2, 1, sizeof(id3v2_tag), info->HANDLE))
+		goto read_error;
+	
+	if (memcmp(id3v2.id, "ID3", 3)) {
+		if (fseek (info->HANDLE, 0, SEEK_SET) < 0)
+		    goto read_error;
+		return 0;
+	}
+
+	if (id3v2.size[0] & 0x80) goto file_error;
+	id3v2_size = unpack_sint28(id3v2.size);
+
+	id3v2_size += (id3v2.flags &
+		ID3_FOOTERPRESENT_FLAG) ? 20 : 10;
+	fseek (info->HANDLE, id3v2_size, SEEK_SET);
+	info->ID3.size = id3v2_size;
+
+	return id3v2_size;
+
+file_error:
+	ttainfo->STATE = FILE_ERROR;
+	return -1;
+
+read_error:
+	ttainfo->STATE = READ_ERROR;
+	return -1;
+}
+
+#endif
+
+static int read_id3_tags (tta_info *info) {
+	id3v1_tag id3v1;
+	id3v2_tag id3v2;
+	id3v2_frame frame_header;
+	int id3v2_size;
+	char *buffer = NULL;
+	char *ptr;
+
+	////////////////////////////////////////
+	// ID3v1 support
+	if (fseek (info->HANDLE, -(int) sizeof(id3v1_tag),
+		SEEK_END) < 0) goto read_error;
+
+	if (!fread (&id3v1, sizeof(id3v1_tag), 1,
+		info->HANDLE)) goto read_error;
+
+	if (!memcmp (id3v1.id, "TAG", 3)) {
+		memcpy(info->ID3.title, id3v1.title, 30);
+		memcpy(info->ID3.artist, id3v1.artist, 30);
+		memcpy(info->ID3.album, id3v1.album, 30);
+		memcpy(info->ID3.year, id3v1.year, 4);
+		memcpy(info->ID3.comment, id3v1.comment, 28);
+
+		if (id3v1.genre > GENRES-1) id3v1.genre = 12;
+		sprintf(info->ID3.track, "%02d", id3v1.track);
+		if (id3v1.genre && id3v1.genre != 0xFF)
+		    sprintf(info->ID3.genre, "%s", genre[id3v1.genre]);
+		info->ID3.id3has |= 1;
+	}
+
+	if (fseek (info->HANDLE, 0, SEEK_SET) < 0)
+		goto read_error;
+
+	////////////////////////////////////////
+	// ID3v2 minimal support
+	if (!fread(&id3v2, 1, sizeof(id3v2_tag), info->HANDLE))
+		goto read_error;
+	
+	if (memcmp(id3v2.id, "ID3", 3)) {
+		if (fseek (info->HANDLE, 0, SEEK_SET) < 0)
+		    goto read_error;
+		return 0;
+	}
+
+	if (id3v2.size[0] & 0x80) goto file_error;
+	id3v2_size = unpack_sint28(id3v2.size);
+
+	if (!(buffer = (unsigned char *) malloc (id3v2_size))) {
+		ttainfo->STATE = MEMORY_ERROR;
+		goto read_done;
+	}
+
+	if ((id3v2.flags & ID3_UNSYNCHRONISATION_FLAG) ||
+		(id3v2.flags & ID3_EXPERIMENTALTAG_FLAG) ||
+		(id3v2.version < 3)) goto read_done;
+
+	if (!fread(buffer, 1, id3v2_size, info->HANDLE)) {
+		free (buffer);
+		goto read_error;
+	}
+
+	ptr = buffer;
+
+	// skip extended header if present
+	if (id3v2.flags & ID3_EXTENDEDHEADER_FLAG) {
+		int offset = unpack_sint32(ptr);
+		ptr += offset;
+	}
+
+	// read id3v2 frames
+	while (ptr - buffer < id3v2_size) {
+		char *data = NULL;
+		int data_size, frame_id;
+		int size = 0;
+
+		// get frame header
+		memcpy(&frame_header, ptr, sizeof(id3v2_frame));
+		ptr += sizeof(id3v2_frame);
+		data_size = unpack_sint32(frame_header.size);
+
+		// skip unsupported frames
+		if (!(frame_id = get_frame_id(frame_header.id)) ||
+			frame_header.flags & FRAME_COMPRESSION_FLAG ||
+			frame_header.flags & FRAME_ENCRYPTION_FLAG ||
+			frame_header.flags & FRAME_UNSYNCHRONISATION_FLAG || (
+			*ptr != FIELD_TEXT_ISO_8859_1 &&
+			*ptr != FIELD_TEXT_UTF_8)) {
+			ptr += data_size;
+			continue;
+		}
+
+		data_size--; ptr++;
+
+		switch (frame_id) {
+		case TIT2:	data = info->ID3.title;
+				size = sizeof(info->ID3.title) - 1; break;
+		case TPE1:	data = info->ID3.artist;
+				size = sizeof(info->ID3.artist) - 1; break;
+		case TALB:	data = info->ID3.album;
+				size = sizeof(info->ID3.album) - 1; break;
+		case TRCK:	data = info->ID3.track;
+				size = sizeof(info->ID3.track) - 1; break;
+		case TYER:	data = info->ID3.year;
+				size = sizeof(info->ID3.year) - 1; break;
+		case TCON:	data = info->ID3.genre;
+				size = sizeof(info->ID3.genre) - 1; break;
+		case COMM:	data = info->ID3.comment;
+				size = sizeof(info->ID3.comment) - 1;
+				data_size -= 3; ptr += 3;
+
+				// skip zero short description
+				if (*ptr == 0) { data_size--; ptr++; }
+				break;
+		}
+
+		if (data_size < size) size = data_size;
+		memcpy(data, ptr, size); data[size] = '\0';
+		ptr += data_size;
+	}
+
+	info->ID3.id3has |= 2;
+
+read_done:
+	if (buffer) free(buffer);
+
+	id3v2_size += (id3v2.flags &
+		ID3_FOOTERPRESENT_FLAG) ? 20 : 10;
+	fseek (info->HANDLE, id3v2_size, SEEK_SET);
+	info->ID3.size = id3v2_size;
+
+	return id3v2_size;
+
+file_error:
+	ttainfo->STATE = FILE_ERROR;
+	return -1;
+
+read_error:
+	ttainfo->STATE = READ_ERROR;
+	return -1;
+}
+
+/* eof */