mp3.c

ffmpeg移植到symbian的全部源代码

/*
 * MP3 muxer and demuxer
 * Copyright (c) 2003 Fabrice Bellard.
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include "libavutil/avstring.h"
#include "libavcodec/mpegaudio.h"
#include "libavcodec/mpegaudiodecheader.h"
#include "avformat.h"

#define ID3v2_HEADER_SIZE 10
#define ID3v1_TAG_SIZE 128

#define ID3v1_GENRE_MAX 125

static const char *id3v1_genre_str[ID3v1_GENRE_MAX + 1] = {
#ifdef __CW32__
	"Blues",
	"Classic Rock",
	"Country",
	"Dance",
	"Disco",
	"Funk",
	"Grunge",
	"Hip-Hop",
	"Jazz",
	"Metal",
	"New Age",
	"Oldies",
	"Other",
	"Pop",
	"R&B",
	"Rap",
	"Reggae",
	"Rock",
	"Techno",
	"Industrial",
	"Alternative",
	"Ska",
	"Death Metal",
	"Pranks",
	"Soundtrack",
	"Euro-Techno",
	"Ambient",
	"Trip-Hop",
	"Vocal",
	"Jazz+Funk",
	"Fusion",
	"Trance",
	"Classical",
	"Instrumental",
	"Acid",
	"House",
	"Game",
	"Sound Clip",
	"Gospel",
	"Noise",
	"AlternRock",
	"Bass",
	"Soul",
	"Punk",
	"Space",
	"Meditative",
	"Instrumental Pop",
	"Instrumental Rock",
	"Ethnic",
	"Gothic",
	"Darkwave",
	"Techno-Industrial",
	"Electronic",
	"Pop-Folk",
	"Eurodance",
	"Dream",
	"Southern Rock",
	"Comedy",
	"Cult",
	"Gangsta",
	"Top 40",
	"Christian Rap",
	"Pop/Funk",
	"Jungle",
	"Native American",
	"Cabaret",
	"New Wave",
	"Psychadelic",
	"Rave",
	"Showtunes",
	"Trailer",
	"Lo-Fi",
	"Tribal",
	"Acid Punk",
	"Acid Jazz",
	"Polka",
	"Retro",
	"Musical",
	"Rock & Roll",
	"Hard Rock",
	"Folk",
	"Folk-Rock",
	"National Folk",
	"Swing",
	"Fast Fusion",
	"Bebob",
	"Latin",
	"Revival",
	"Celtic",
	"Bluegrass",
	"Avantgarde",
	"Gothic Rock",
	"Progressive Rock",
	"Psychedelic Rock",
	"Symphonic Rock",
	"Slow Rock",
	"Big Band",
	"Chorus",
	"Easy Listening",
	"Acoustic",
	"Humour",
	"Speech",
	"Chanson",
	"Opera",
	"Chamber Music",
	"Sonata",
	"Symphony",
	"Booty Bass",
	"Primus",
	"Porn Groove",
	"Satire",
	"Slow Jam",
	"Club",
	"Tango",
	"Samba",
	"Folklore",
	"Ballad",
	"Power Ballad",
	"Rhythmic Soul",
	"Freestyle",
	"Duet",
	"Punk Rock",
	"Drum Solo",
	"A capella",
	"Euro-House",
	"Dance Hall",
#else
    [0] = "Blues",
    [1] = "Classic Rock",
    [2] = "Country",
    [3] = "Dance",
    [4] = "Disco",
    [5] = "Funk",
    [6] = "Grunge",
    [7] = "Hip-Hop",
    [8] = "Jazz",
    [9] = "Metal",
    [10] = "New Age",
    [11] = "Oldies",
    [12] = "Other",
    [13] = "Pop",
    [14] = "R&B",
    [15] = "Rap",
    [16] = "Reggae",
    [17] = "Rock",
    [18] = "Techno",
    [19] = "Industrial",
    [20] = "Alternative",
    [21] = "Ska",
    [22] = "Death Metal",
    [23] = "Pranks",
    [24] = "Soundtrack",
    [25] = "Euro-Techno",
    [26] = "Ambient",
    [27] = "Trip-Hop",
    [28] = "Vocal",
    [29] = "Jazz+Funk",
    [30] = "Fusion",
    [31] = "Trance",
    [32] = "Classical",
    [33] = "Instrumental",
    [34] = "Acid",
    [35] = "House",
    [36] = "Game",
    [37] = "Sound Clip",
    [38] = "Gospel",
    [39] = "Noise",
    [40] = "AlternRock",
    [41] = "Bass",
    [42] = "Soul",
    [43] = "Punk",
    [44] = "Space",
    [45] = "Meditative",
    [46] = "Instrumental Pop",
    [47] = "Instrumental Rock",
    [48] = "Ethnic",
    [49] = "Gothic",
    [50] = "Darkwave",
    [51] = "Techno-Industrial",
    [52] = "Electronic",
    [53] = "Pop-Folk",
    [54] = "Eurodance",
    [55] = "Dream",
    [56] = "Southern Rock",
    [57] = "Comedy",
    [58] = "Cult",
    [59] = "Gangsta",
    [60] = "Top 40",
    [61] = "Christian Rap",
    [62] = "Pop/Funk",
    [63] = "Jungle",
    [64] = "Native American",
    [65] = "Cabaret",
    [66] = "New Wave",
    [67] = "Psychadelic",
    [68] = "Rave",
    [69] = "Showtunes",
    [70] = "Trailer",
    [71] = "Lo-Fi",
    [72] = "Tribal",
    [73] = "Acid Punk",
    [74] = "Acid Jazz",
    [75] = "Polka",
    [76] = "Retro",
    [77] = "Musical",
    [78] = "Rock & Roll",
    [79] = "Hard Rock",
    [80] = "Folk",
    [81] = "Folk-Rock",
    [82] = "National Folk",
    [83] = "Swing",
    [84] = "Fast Fusion",
    [85] = "Bebob",
    [86] = "Latin",
    [87] = "Revival",
    [88] = "Celtic",
    [89] = "Bluegrass",
    [90] = "Avantgarde",
    [91] = "Gothic Rock",
    [92] = "Progressive Rock",
    [93] = "Psychedelic Rock",
    [94] = "Symphonic Rock",
    [95] = "Slow Rock",
    [96] = "Big Band",
    [97] = "Chorus",
    [98] = "Easy Listening",
    [99] = "Acoustic",
    [100] = "Humour",
    [101] = "Speech",
    [102] = "Chanson",
    [103] = "Opera",
    [104] = "Chamber Music",
    [105] = "Sonata",
    [106] = "Symphony",
    [107] = "Booty Bass",
    [108] = "Primus",
    [109] = "Porn Groove",
    [110] = "Satire",
    [111] = "Slow Jam",
    [112] = "Club",
    [113] = "Tango",
    [114] = "Samba",
    [115] = "Folklore",
    [116] = "Ballad",
    [117] = "Power Ballad",
    [118] = "Rhythmic Soul",
    [119] = "Freestyle",
    [120] = "Duet",
    [121] = "Punk Rock",
    [122] = "Drum Solo",
    [123] = "A capella",
    [124] = "Euro-House",
    [125] = "Dance Hall",
#endif
};

/* buf must be ID3v2_HEADER_SIZE byte long */
static int id3v2_match(const uint8_t *buf)
{
    return  buf[0] == 'I' &&
            buf[1] == 'D' &&
            buf[2] == '3' &&
            buf[3] != 0xff &&
            buf[4] != 0xff &&
            (buf[6] & 0x80) == 0 &&
            (buf[7] & 0x80) == 0 &&
            (buf[8] & 0x80) == 0 &&
            (buf[9] & 0x80) == 0;
}

static unsigned int id3v2_get_size(ByteIOContext *s, int len)
{
    int v=0;
    while(len--)
        v= (v<<7) + (get_byte(s)&0x7F);
    return v;
}

static void id3v2_read_ttag(AVFormatContext *s, int taglen, char *dst, int dstlen)
{
    char *q;
    int len;

    if(dstlen > 0)
        dst[0]= 0;
    if(taglen < 1)
        return;

    taglen--; /* account for encoding type byte */
    dstlen--; /* Leave space for zero terminator */

    switch(get_byte(s->pb)) { /* encoding type */

    case 0:  /* ISO-8859-1 (0 - 255 maps directly into unicode) */
        q = dst;
        while(taglen--) {
            uint8_t tmp;
            PUT_UTF8(get_byte(s->pb), tmp, if (q - dst < dstlen - 1) *q++ = tmp;)
        }
        *q = '\0';
        break;

    case 3:  /* UTF-8 */
        len = FFMIN(taglen, dstlen-1);
#ifndef __CW32__
        get_buffer(s->pb, dst, len);
#else
        get_buffer(s->pb, (unsigned char*)dst, len);
#endif
        dst[len] = 0;
        break;
    }
}

/**
 * ID3v2 parser
 *
 * Handles ID3v2.2, 2.3 and 2.4.
 *
 */

static void id3v2_parse(AVFormatContext *s, int len, uint8_t version, uint8_t flags)
{
    int isv34, tlen;
    uint32_t tag;
    offset_t next;
    char tmp[16];
    int taghdrlen;
    const char *reason;

    switch(version) {
    case 2:
        if(flags & 0x40) {
            reason = "compression";
            goto error;
        }
        isv34 = 0;
        taghdrlen = 6;
        break;

    case 3:
    case 4:
        isv34 = 1;
        taghdrlen = 10;
        break;

    default:
        reason = "version";
        goto error;
    }

    if(flags & 0x80) {
        reason = "unsynchronization";
        goto error;
    }

    if(isv34 && flags & 0x40) /* Extended header present, just skip over it */
        url_fskip(s->pb, id3v2_get_size(s->pb, 4));

    while(len >= taghdrlen) {
        if(isv34) {
            tag  = get_be32(s->pb);
            tlen = id3v2_get_size(s->pb, 4);
            get_be16(s->pb); /* flags */
        } else {
            tag  = get_be24(s->pb);
            tlen = id3v2_get_size(s->pb, 3);
        }
        len -= taghdrlen + tlen;

        if(len < 0)
            break;

        next = url_ftell(s->pb) + tlen;

        switch(tag) {
        case MKBETAG('T', 'I', 'T', '2'):
        case MKBETAG(0,   'T', 'T', '2'):
            id3v2_read_ttag(s, tlen, s->title, sizeof(s->title));
            break;
        case MKBETAG('T', 'P', 'E', '1'):
        case MKBETAG(0,   'T', 'P', '1'):
            id3v2_read_ttag(s, tlen, s->author, sizeof(s->author));
            break;
        case MKBETAG('T', 'A', 'L', 'B'):
        case MKBETAG(0,   'T', 'A', 'L'):
            id3v2_read_ttag(s, tlen, s->album, sizeof(s->album));
            break;