816fca820c
current status of the decoder : - Plays and seeks in the sim - Still in floating point git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27006 a1c6a512-1295-4272-9138-f99709370657
548 lines
20 KiB
C
548 lines
20 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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*
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* $Id$
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*
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* Copyright (C) 2007 Dave Chapman
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <inttypes.h>
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#include "metadata.h"
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#include "replaygain.h"
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#include "debug.h"
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#include "rbunicode.h"
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#include "metadata_common.h"
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#include "metadata_parsers.h"
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#include "system.h"
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#include <codecs/libasf/asf.h>
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/* TODO: Just read the GUIDs into a 16-byte array, and use memcmp to compare */
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struct guid_s {
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uint32_t v1;
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uint16_t v2;
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uint16_t v3;
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uint8_t v4[8];
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};
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typedef struct guid_s guid_t;
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struct asf_object_s {
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guid_t guid;
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uint64_t size;
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uint64_t datalen;
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};
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typedef struct asf_object_s asf_object_t;
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static const guid_t asf_guid_null =
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{0x00000000, 0x0000, 0x0000, {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}};
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/* top level object guids */
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static const guid_t asf_guid_header =
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{0x75B22630, 0x668E, 0x11CF, {0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C}};
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static const guid_t asf_guid_data =
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{0x75B22636, 0x668E, 0x11CF, {0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C}};
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static const guid_t asf_guid_index =
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{0x33000890, 0xE5B1, 0x11CF, {0x89, 0xF4, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xCB}};
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/* header level object guids */
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static const guid_t asf_guid_file_properties =
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{0x8cabdca1, 0xa947, 0x11cf, {0x8E, 0xe4, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65}};
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static const guid_t asf_guid_stream_properties =
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{0xB7DC0791, 0xA9B7, 0x11CF, {0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65}};
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static const guid_t asf_guid_content_description =
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{0x75B22633, 0x668E, 0x11CF, {0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C}};
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static const guid_t asf_guid_extended_content_description =
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{0xD2D0A440, 0xE307, 0x11D2, {0x97, 0xF0, 0x00, 0xA0, 0xC9, 0x5E, 0xA8, 0x50}};
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static const guid_t asf_guid_content_encryption =
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{0x2211b3fb, 0xbd23, 0x11d2, {0xb4, 0xb7, 0x00, 0xa0, 0xc9, 0x55, 0xfc, 0x6e}};
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static const guid_t asf_guid_extended_content_encryption =
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{0x298ae614, 0x2622, 0x4c17, {0xb9, 0x35, 0xda, 0xe0, 0x7e, 0xe9, 0x28, 0x9c}};
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/* stream type guids */
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static const guid_t asf_guid_stream_type_audio =
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{0xF8699E40, 0x5B4D, 0x11CF, {0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B}};
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static int asf_guid_match(const guid_t *guid1, const guid_t *guid2)
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{
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if((guid1->v1 != guid2->v1) ||
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(guid1->v2 != guid2->v2) ||
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(guid1->v3 != guid2->v3) ||
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(memcmp(guid1->v4, guid2->v4, 8))) {
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return 0;
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}
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return 1;
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}
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/* Read the 16 byte GUID from a file */
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static void asf_readGUID(int fd, guid_t* guid)
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{
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read_uint32le(fd, &guid->v1);
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read_uint16le(fd, &guid->v2);
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read_uint16le(fd, &guid->v3);
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read(fd, guid->v4, 8);
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}
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static void asf_read_object_header(asf_object_t *obj, int fd)
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{
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asf_readGUID(fd, &obj->guid);
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read_uint64le(fd, &obj->size);
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obj->datalen = 0;
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}
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/* Parse an integer from the extended content object - we always
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convert to an int, regardless of native format.
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*/
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static int asf_intdecode(int fd, int type, int length)
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{
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uint16_t tmp16;
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uint32_t tmp32;
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uint64_t tmp64;
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if (type == 3) {
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read_uint32le(fd, &tmp32);
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lseek(fd,length - 4,SEEK_CUR);
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return (int)tmp32;
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} else if (type == 4) {
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read_uint64le(fd, &tmp64);
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lseek(fd,length - 8,SEEK_CUR);
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return (int)tmp64;
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} else if (type == 5) {
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read_uint16le(fd, &tmp16);
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lseek(fd,length - 2,SEEK_CUR);
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return (int)tmp16;
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}
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return 0;
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}
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/* Decode a LE utf16 string from a disk buffer into a fixed-sized
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utf8 buffer.
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*/
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static void asf_utf16LEdecode(int fd,
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uint16_t utf16bytes,
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unsigned char **utf8,
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int* utf8bytes
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)
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{
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unsigned long ucs;
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int n;
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unsigned char utf16buf[256];
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unsigned char* utf16 = utf16buf;
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unsigned char* newutf8;
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n = read(fd, utf16buf, MIN(sizeof(utf16buf), utf16bytes));
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utf16bytes -= n;
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while (n > 0) {
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/* Check for a surrogate pair */
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if (utf16[1] >= 0xD8 && utf16[1] < 0xE0) {
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if (n < 4) {
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/* Run out of utf16 bytes, read some more */
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utf16buf[0] = utf16[0];
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utf16buf[1] = utf16[1];
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n = read(fd, utf16buf + 2, MIN(sizeof(utf16buf)-2, utf16bytes));
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utf16 = utf16buf;
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utf16bytes -= n;
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n += 2;
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}
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if (n < 4) {
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/* Truncated utf16 string, abort */
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break;
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}
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ucs = 0x10000 + ((utf16[0] << 10) | ((utf16[1] - 0xD8) << 18)
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| utf16[2] | ((utf16[3] - 0xDC) << 8));
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utf16 += 4;
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n -= 4;
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} else {
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ucs = (utf16[0] | (utf16[1] << 8));
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utf16 += 2;
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n -= 2;
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}
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if (*utf8bytes > 6) {
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newutf8 = utf8encode(ucs, *utf8);
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*utf8bytes -= (newutf8 - *utf8);
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*utf8 += (newutf8 - *utf8);
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}
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/* We have run out of utf16 bytes, read more if available */
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if ((n == 0) && (utf16bytes > 0)) {
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n = read(fd, utf16buf, MIN(sizeof(utf16buf), utf16bytes));
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utf16 = utf16buf;
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utf16bytes -= n;
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}
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}
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*utf8[0] = 0;
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--*utf8bytes;
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if (utf16bytes > 0) {
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/* Skip any remaining bytes */
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lseek(fd, utf16bytes, SEEK_CUR);
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}
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return;
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}
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static int asf_parse_header(int fd, struct mp3entry* id3,
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asf_waveformatex_t* wfx)
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{
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asf_object_t current;
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asf_object_t header;
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uint64_t datalen;
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int i;
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int fileprop = 0;
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uint64_t play_duration;
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uint16_t flags;
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uint32_t subobjects;
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uint8_t utf8buf[512];
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int id3buf_remaining = sizeof(id3->id3v2buf) + sizeof(id3->id3v1buf);
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unsigned char* id3buf = (unsigned char*)id3->id3v2buf;
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asf_read_object_header((asf_object_t *) &header, fd);
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//DEBUGF("header.size=%d\n",(int)header.size);
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if (header.size < 30) {
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/* invalid size for header object */
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return ASF_ERROR_OBJECT_SIZE;
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}
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read_uint32le(fd, &subobjects);
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/* Two reserved bytes - do we need to read them? */
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lseek(fd, 2, SEEK_CUR);
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//DEBUGF("Read header - size=%d, subobjects=%d\n",(int)header.size, (int)subobjects);
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if (subobjects > 0) {
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header.datalen = header.size - 30;
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/* TODO: Check that we have datalen bytes left in the file */
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datalen = header.datalen;
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for (i=0; i<(int)subobjects; i++) {
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//DEBUGF("Parsing header object %d - datalen=%d\n",i,(int)datalen);
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if (datalen < 24) {
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//DEBUGF("not enough data for reading object\n");
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break;
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}
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asf_read_object_header(¤t, fd);
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if (current.size > datalen || current.size < 24) {
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//DEBUGF("invalid object size - current.size=%d, datalen=%d\n",(int)current.size,(int)datalen);
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break;
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}
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if (asf_guid_match(¤t.guid, &asf_guid_file_properties)) {
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if (current.size < 104)
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return ASF_ERROR_OBJECT_SIZE;
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if (fileprop) {
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/* multiple file properties objects not allowed */
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return ASF_ERROR_INVALID_OBJECT;
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}
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fileprop = 1;
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/* Get the number of logical packets - uint16_t at offset 31
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* (Big endian byte order) */
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lseek(fd, 31, SEEK_CUR);
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read_uint16be(fd, &wfx->numpackets);
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/* Now get the play duration - uint64_t at offset 40 */
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lseek(fd, 7, SEEK_CUR);
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read_uint64le(fd, &play_duration);
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id3->length = play_duration / 10000;
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//DEBUGF("****** length = %lums\n", id3->length);
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/* Read the packet size - uint32_t at offset 68 */
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lseek(fd, 20, SEEK_CUR);
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read_uint32le(fd, &wfx->packet_size);
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/* Skip bytes remaining in object */
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lseek(fd, current.size - 24 - 72, SEEK_CUR);
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} else if (asf_guid_match(¤t.guid, &asf_guid_stream_properties)) {
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guid_t guid;
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uint32_t propdatalen;
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if (current.size < 78)
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return ASF_ERROR_OBJECT_SIZE;
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#if 0
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asf_byteio_getGUID(&guid, current->data);
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datalen = asf_byteio_getDWLE(current->data + 40);
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flags = asf_byteio_getWLE(current->data + 48);
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#endif
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asf_readGUID(fd, &guid);
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lseek(fd, 24, SEEK_CUR);
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read_uint32le(fd, &propdatalen);
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lseek(fd, 4, SEEK_CUR);
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read_uint16le(fd, &flags);
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if (!asf_guid_match(&guid, &asf_guid_stream_type_audio)) {
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//DEBUGF("Found stream properties for non audio stream, skipping\n");
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lseek(fd,current.size - 24 - 50,SEEK_CUR);
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} else if (wfx->audiostream == -1) {
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lseek(fd, 4, SEEK_CUR);
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//DEBUGF("Found stream properties for audio stream %d\n",flags&0x7f);
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if (propdatalen < 18) {
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return ASF_ERROR_INVALID_LENGTH;
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}
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#if 0
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if (asf_byteio_getWLE(data + 16) > datalen - 16) {
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return ASF_ERROR_INVALID_LENGTH;
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}
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#endif
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read_uint16le(fd, &wfx->codec_id);
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read_uint16le(fd, &wfx->channels);
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read_uint32le(fd, &wfx->rate);
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read_uint32le(fd, &wfx->bitrate);
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wfx->bitrate *= 8;
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read_uint16le(fd, &wfx->blockalign);
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read_uint16le(fd, &wfx->bitspersample);
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read_uint16le(fd, &wfx->datalen);
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/* Round bitrate to the nearest kbit */
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id3->bitrate = (wfx->bitrate + 500) / 1000;
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id3->frequency = wfx->rate;
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if (wfx->codec_id == ASF_CODEC_ID_WMAV1) {
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read(fd, wfx->data, 4);
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lseek(fd,current.size - 24 - 72 - 4,SEEK_CUR);
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wfx->audiostream = flags&0x7f;
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} else if (wfx->codec_id == ASF_CODEC_ID_WMAV2) {
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read(fd, wfx->data, 6);
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lseek(fd,current.size - 24 - 72 - 6,SEEK_CUR);
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wfx->audiostream = flags&0x7f;
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} else if (wfx->codec_id == ASF_CODEC_ID_WMAPRO) {
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/* wma pro decoder needs the extra-data */
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read(fd, wfx->data, wfx->datalen);
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lseek(fd,current.size - 24 - 72 - wfx->datalen,SEEK_CUR);
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wfx->audiostream = flags&0x7f;
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/* Correct codectype to redirect playback to the proper .codec */
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id3->codectype = AFMT_WMAPRO;
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} else {
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DEBUGF("Unsupported WMA codec (Lossless, Voice, etc)\n");
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lseek(fd,current.size - 24 - 72,SEEK_CUR);
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}
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}
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} else if (asf_guid_match(¤t.guid, &asf_guid_content_description)) {
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/* Object contains five 16-bit string lengths, followed by the five strings:
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title, artist, copyright, description, rating
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*/
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uint16_t strlength[5];
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int i;
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//DEBUGF("Found GUID_CONTENT_DESCRIPTION - size=%d\n",(int)(current.size - 24));
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/* Read the 5 string lengths - number of bytes included trailing zero */
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for (i=0; i<5; i++) {
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read_uint16le(fd, &strlength[i]);
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//DEBUGF("strlength = %u\n",strlength[i]);
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}
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if (strlength[0] > 0) { /* 0 - Title */
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id3->title = id3buf;
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asf_utf16LEdecode(fd, strlength[0], &id3buf, &id3buf_remaining);
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}
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if (strlength[1] > 0) { /* 1 - Artist */
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id3->artist = id3buf;
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asf_utf16LEdecode(fd, strlength[1], &id3buf, &id3buf_remaining);
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}
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lseek(fd, strlength[2], SEEK_CUR); /* 2 - copyright */
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if (strlength[3] > 0) { /* 3 - description */
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id3->comment = id3buf;
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asf_utf16LEdecode(fd, strlength[3], &id3buf, &id3buf_remaining);
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}
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lseek(fd, strlength[4], SEEK_CUR); /* 4 - rating */
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} else if (asf_guid_match(¤t.guid, &asf_guid_extended_content_description)) {
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uint16_t count;
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int i;
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int bytesleft = current.size - 24;
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//DEBUGF("Found GUID_EXTENDED_CONTENT_DESCRIPTION\n");
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read_uint16le(fd, &count);
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bytesleft -= 2;
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//DEBUGF("extended metadata count = %u\n",count);
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for (i=0; i < count; i++) {
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uint16_t length, type;
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unsigned char* utf8 = utf8buf;
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int utf8length = 512;
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read_uint16le(fd, &length);
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asf_utf16LEdecode(fd, length, &utf8, &utf8length);
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bytesleft -= 2 + length;
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read_uint16le(fd, &type);
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read_uint16le(fd, &length);
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if (!strcmp("WM/TrackNumber",utf8buf)) {
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if (type == 0) {
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id3->track_string = id3buf;
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asf_utf16LEdecode(fd, length, &id3buf, &id3buf_remaining);
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id3->tracknum = atoi(id3->track_string);
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} else if ((type >=2) && (type <= 5)) {
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id3->tracknum = asf_intdecode(fd, type, length);
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} else {
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lseek(fd, length, SEEK_CUR);
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}
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} else if ((!strcmp("WM/Genre", utf8buf)) && (type == 0)) {
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id3->genre_string = id3buf;
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asf_utf16LEdecode(fd, length, &id3buf, &id3buf_remaining);
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} else if ((!strcmp("WM/AlbumTitle", utf8buf)) && (type == 0)) {
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id3->album = id3buf;
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asf_utf16LEdecode(fd, length, &id3buf, &id3buf_remaining);
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} else if ((!strcmp("WM/AlbumArtist", utf8buf)) && (type == 0)) {
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id3->albumartist = id3buf;
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asf_utf16LEdecode(fd, length, &id3buf, &id3buf_remaining);
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} else if ((!strcmp("WM/Composer", utf8buf)) && (type == 0)) {
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id3->composer = id3buf;
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asf_utf16LEdecode(fd, length, &id3buf, &id3buf_remaining);
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} else if (!strcmp("WM/Year", utf8buf)) {
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if (type == 0) {
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id3->year_string = id3buf;
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asf_utf16LEdecode(fd, length, &id3buf, &id3buf_remaining);
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id3->year = atoi(id3->year_string);
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} else if ((type >=2) && (type <= 5)) {
|
|
id3->year = asf_intdecode(fd, type, length);
|
|
} else {
|
|
lseek(fd, length, SEEK_CUR);
|
|
}
|
|
} else if (!strncmp("replaygain_", utf8buf, 11)) {
|
|
char* value = id3buf;
|
|
int buf_len = id3buf_remaining;
|
|
int len;
|
|
asf_utf16LEdecode(fd, length, &id3buf, &id3buf_remaining);
|
|
len = parse_replaygain(utf8buf, value, id3,
|
|
value, buf_len);
|
|
|
|
if (len == 0) {
|
|
/* Don't need to keep the value */
|
|
id3buf = value;
|
|
id3buf_remaining = buf_len;
|
|
}
|
|
} else if (!strcmp("MusicBrainz/Track Id", utf8buf)) {
|
|
id3->mb_track_id = id3buf;
|
|
asf_utf16LEdecode(fd, length, &id3buf, &id3buf_remaining);
|
|
} else {
|
|
lseek(fd, length, SEEK_CUR);
|
|
}
|
|
bytesleft -= 4 + length;
|
|
}
|
|
|
|
lseek(fd, bytesleft, SEEK_CUR);
|
|
} else if (asf_guid_match(¤t.guid, &asf_guid_content_encryption)
|
|
|| asf_guid_match(¤t.guid, &asf_guid_extended_content_encryption)) {
|
|
//DEBUGF("File is encrypted\n");
|
|
return ASF_ERROR_ENCRYPTED;
|
|
} else {
|
|
//DEBUGF("Skipping %d bytes of object\n",(int)(current.size - 24));
|
|
lseek(fd,current.size - 24,SEEK_CUR);
|
|
}
|
|
|
|
//DEBUGF("Parsed object - size = %d\n",(int)current.size);
|
|
datalen -= current.size;
|
|
}
|
|
|
|
if (i != (int)subobjects || datalen != 0) {
|
|
//DEBUGF("header data doesn't match given subobject count\n");
|
|
return ASF_ERROR_INVALID_VALUE;
|
|
}
|
|
|
|
//DEBUGF("%d subobjects read successfully\n", i);
|
|
}
|
|
|
|
#if 0
|
|
tmp = asf_parse_header_validate(file, &header);
|
|
if (tmp < 0) {
|
|
/* header read ok but doesn't validate correctly */
|
|
return tmp;
|
|
}
|
|
#endif
|
|
|
|
//DEBUGF("header validated correctly\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
bool get_asf_metadata(int fd, struct mp3entry* id3)
|
|
{
|
|
int res;
|
|
asf_object_t obj;
|
|
asf_waveformatex_t wfx;
|
|
|
|
wfx.audiostream = -1;
|
|
|
|
res = asf_parse_header(fd, id3, &wfx);
|
|
|
|
if (res < 0) {
|
|
DEBUGF("ASF: parsing error - %d\n",res);
|
|
return false;
|
|
}
|
|
|
|
if (wfx.audiostream == -1) {
|
|
DEBUGF("ASF: No WMA streams found\n");
|
|
return false;
|
|
}
|
|
|
|
asf_read_object_header(&obj, fd);
|
|
|
|
if (!asf_guid_match(&obj.guid, &asf_guid_data)) {
|
|
DEBUGF("ASF: No data object found\n");
|
|
return false;
|
|
}
|
|
|
|
/* Store the current file position - no need to parse the header
|
|
again in the codec. The +26 skips the rest of the data object
|
|
header.
|
|
*/
|
|
id3->first_frame_offset = lseek(fd, 0, SEEK_CUR) + 26;
|
|
id3->filesize = filesize(fd);
|
|
/* We copy the wfx struct to the MP3 TOC field in the id3 struct so
|
|
the codec doesn't need to parse the header object again */
|
|
memcpy(id3->toc, &wfx, sizeof(wfx));
|
|
|
|
return true;
|
|
}
|