+++ /dev/null
-/*
- * MP3 encoder and decoder
- * Copyright (c) 2003 Fabrice Bellard.
- *
- * This library 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 of the License, or (at your option) any later version.
- *
- * This library 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-#include "avformat.h"
-
-#define ID3_HEADER_SIZE 10
-#define ID3_TAG_SIZE 128
-
-#define ID3_GENRE_MAX 125
-
-static const char *id3_genre_str[ID3_GENRE_MAX + 1] = {
- [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",
-};
-
-/* buf must be ID3_HEADER_SIZE byte long */
-static int id3_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 void id3_get_string(char *str, int str_size,
- const uint8_t *buf, int buf_size)
-{
- int i, c;
- char *q;
-
- q = str;
- for(i = 0; i < buf_size; i++) {
- c = buf[i];
- if (c == '\0')
- break;
- if ((q - str) >= str_size - 1)
- break;
- *q++ = c;
- }
- *q = '\0';
-}
-
-/* 'buf' must be ID3_TAG_SIZE byte long */
-static int id3_parse_tag(AVFormatContext *s, const uint8_t *buf)
-{
- char str[5];
- int genre;
-
- if (!(buf[0] == 'T' &&
- buf[1] == 'A' &&
- buf[2] == 'G'))
- return -1;
- id3_get_string(s->title, sizeof(s->title), buf + 3, 30);
- id3_get_string(s->author, sizeof(s->author), buf + 33, 30);
- id3_get_string(s->album, sizeof(s->album), buf + 63, 30);
- id3_get_string(str, sizeof(str), buf + 93, 4);
- s->year = atoi(str);
- id3_get_string(s->comment, sizeof(s->comment), buf + 97, 30);
- if (buf[125] == 0 && buf[126] != 0)
- s->track = buf[126];
- genre = buf[127];
- if (genre <= ID3_GENRE_MAX)
- pstrcpy(s->genre, sizeof(s->genre), id3_genre_str[genre]);
- return 0;
-}
-
-static void id3_create_tag(AVFormatContext *s, uint8_t *buf)
-{
- int v, i;
-
- memset(buf, 0, ID3_TAG_SIZE); /* fail safe */
- buf[0] = 'T';
- buf[1] = 'A';
- buf[2] = 'G';
- strncpy(buf + 3, s->title, 30);
- strncpy(buf + 33, s->author, 30);
- strncpy(buf + 63, s->album, 30);
- v = s->year;
- if (v > 0) {
- for(i = 0;i < 4; i++) {
- buf[96 - i] = '0' + (v % 10);
- v = v / 10;
- }
- }
- strncpy(buf + 97, s->comment, 30);
- if (s->track != 0) {
- buf[125] = 0;
- buf[126] = s->track;
- }
- for(i = 0; i <= ID3_GENRE_MAX; i++) {
- if (!strcasecmp(s->genre, id3_genre_str[i])) {
- buf[127] = i;
- break;
- }
- }
-}
-
-/* mp3 read */
-static int mp3_read_header(AVFormatContext *s,
- AVFormatParameters *ap)
-{
- AVStream *st;
- uint8_t buf[ID3_TAG_SIZE];
- int len, ret, filesize;
-
- st = av_new_stream(s, 0);
- if (!st)
- return AVERROR_NOMEM;
-
- st->codec.codec_type = CODEC_TYPE_AUDIO;
- st->codec.codec_id = CODEC_ID_MP3;
-
- /* try to get the TAG */
- if (!url_is_streamed(&s->pb)) {
- /* XXX: change that */
- filesize = url_filesize(url_fileno(&s->pb));
- if (filesize > 128) {
- url_fseek(&s->pb, filesize - 128, SEEK_SET);
- ret = get_buffer(&s->pb, buf, ID3_TAG_SIZE);
- if (ret == ID3_TAG_SIZE) {
- id3_parse_tag(s, buf);
- }
- url_fseek(&s->pb, 0, SEEK_SET);
- }
- }
-
- /* if ID3 header found, skip it */
- ret = get_buffer(&s->pb, buf, ID3_HEADER_SIZE);
- if (ret != ID3_HEADER_SIZE)
- return -1;
- if (id3_match(buf)) {
- /* skip ID3 header */
- len = ((buf[6] & 0x7f) << 21) |
- ((buf[7] & 0x7f) << 14) |
- ((buf[8] & 0x7f) << 7) |
- (buf[9] & 0x7f);
- url_fskip(&s->pb, len);
- } else {
- url_fseek(&s->pb, 0, SEEK_SET);
- }
-
- /* the parameters will be extracted from the compressed bitstream */
- return 0;
-}
-
-#define MP3_PACKET_SIZE 1024
-
-static int mp3_read_packet(AVFormatContext *s, AVPacket *pkt)
-{
- int ret, size;
- // AVStream *st = s->streams[0];
-
- size= MP3_PACKET_SIZE;
-
- if (av_new_packet(pkt, size) < 0)
- return -EIO;
-
- pkt->stream_index = 0;
- ret = get_buffer(&s->pb, pkt->data, size);
- if (ret <= 0) {
- av_free_packet(pkt);
- return -EIO;
- }
- /* note: we need to modify the packet size here to handle the last
- packet */
- pkt->size = ret;
- return ret;
-}
-
-static int mp3_read_close(AVFormatContext *s)
-{
- return 0;
-}
-
-/* simple formats */
-static int mp3_write_header(struct AVFormatContext *s)
-{
- return 0;
-}
-
-static int mp3_write_packet(struct AVFormatContext *s, int stream_index,
- const uint8_t *buf, int size, int64_t pts)
-{
- put_buffer(&s->pb, buf, size);
- put_flush_packet(&s->pb);
- return 0;
-}
-
-static int mp3_write_trailer(struct AVFormatContext *s)
-{
- uint8_t buf[ID3_TAG_SIZE];
-
- /* write the id3 header */
- if (s->title[0] != '\0') {
- id3_create_tag(s, buf);
- put_buffer(&s->pb, buf, ID3_TAG_SIZE);
- put_flush_packet(&s->pb);
- }
- return 0;
-}
-
-AVInputFormat mp3_iformat = {
- "mp3",
- "MPEG audio",
- 0,
- NULL,
- mp3_read_header,
- mp3_read_packet,
- mp3_read_close,
- .extensions = "mp2,mp3", /* XXX: use probe */
-};
-
-AVOutputFormat mp2_oformat = {
- "mp2",
- "MPEG audio layer 2",
- "audio/x-mpeg",
-#ifdef CONFIG_MP3LAME
- "mp2",
-#else
- "mp2,mp3",
-#endif
- 0,
- CODEC_ID_MP2,
- 0,
- mp3_write_header,
- mp3_write_packet,
- mp3_write_trailer,
-};
-
-#ifdef CONFIG_MP3LAME
-AVOutputFormat mp3_oformat = {
- "mp3",
- "MPEG audio layer 3",
- "audio/x-mpeg",
- "mp3",
- 0,
- CODEC_ID_MP3,
- 0,
- mp3_write_header,
- mp3_write_packet,
- mp3_write_trailer,
-};
-#endif
-
-int mp3_init(void)
-{
- av_register_input_format(&mp3_iformat);
- av_register_output_format(&mp2_oformat);
-#ifdef CONFIG_MP3LAME
- av_register_output_format(&mp3_oformat);
-#endif
- return 0;
-}
projects / synfig.git / blobdiff