making act segmenter

1 files changed, 246 insertions, 0 deletions

diff --git a/ffmpeg/libavformat/id3v1.c b/ffmpeg/libavformat/id3v1.c
new file mode 100644
index 0000000..d73adc7
--- /dev/null
+++ b/ffmpeg/libavformat/id3v1.c
@@ -0,0 +1,246 @@
+/*
+ * ID3v1 header parser
+ * 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 "id3v1.h"
+#include "libavcodec/avcodec.h"
+#include "libavutil/dict.h"
+
+/* See Genre List at http://id3.org/id3v2.3.0 */
+const char * const ff_id3v1_genre_str[ID3v1_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", /* sic, the misspelling is used in the specification */
+     [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",
+    [126] = "Goa",
+    [127] = "Drum & Bass",
+    [128] = "Club-House",
+    [129] = "Hardcore",
+    [130] = "Terror",
+    [131] = "Indie",
+    [132] = "BritPop",
+    [133] = "Negerpunk",
+    [134] = "Polsk Punk",
+    [135] = "Beat",
+    [136] = "Christian Gangsta",
+    [137] = "Heavy Metal",
+    [138] = "Black Metal",
+    [139] = "Crossover",
+    [140] = "Contemporary Christian",
+    [141] = "Christian Rock",
+    [142] = "Merengue",
+    [143] = "Salsa",
+    [144] = "Thrash Metal",
+    [145] = "Anime",
+    [146] = "JPop",
+    [147] = "SynthPop",
+};
+
+static void get_string(AVFormatContext *s, const char *key,
+                       const uint8_t *buf, int buf_size)
+{
+    int i, c;
+    char *q, str[512];
+
+    q = str;
+    for(i = 0; i < buf_size; i++) {
+        c = buf[i];
+        if (c == '\0')
+            break;
+        if ((q - str) >= sizeof(str) - 1)
+            break;
+        *q++ = c;
+    }
+    *q = '\0';
+
+    if (*str)
+        av_dict_set(&s->metadata, key, str, 0);
+}
+
+/**
+ * Parse an ID3v1 tag
+ *
+ * @param buf ID3v1_TAG_SIZE long buffer containing the tag
+ */
+static int 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;
+    get_string(s, "title",   buf +  3, 30);
+    get_string(s, "artist",  buf + 33, 30);
+    get_string(s, "album",   buf + 63, 30);
+    get_string(s, "date",    buf + 93,  4);
+    get_string(s, "comment", buf + 97, 30);
+    if (buf[125] == 0 && buf[126] != 0) {
+        snprintf(str, sizeof(str), "%d", buf[126]);
+        av_dict_set(&s->metadata, "track", str, 0);
+    }
+    genre = buf[127];
+    if (genre <= ID3v1_GENRE_MAX)
+        av_dict_set(&s->metadata, "genre", ff_id3v1_genre_str[genre], 0);
+    return 0;
+}
+
+void ff_id3v1_read(AVFormatContext *s)
+{
+    int ret;
+    uint8_t buf[ID3v1_TAG_SIZE];
+    int64_t filesize, position = avio_tell(s->pb);
+
+    if (s->pb->seekable) {
+        /* XXX: change that */
+        filesize = avio_size(s->pb);
+        if (filesize > 128) {
+            avio_seek(s->pb, filesize - 128, SEEK_SET);
+            ret = avio_read(s->pb, buf, ID3v1_TAG_SIZE);
+            if (ret == ID3v1_TAG_SIZE) {
+                parse_tag(s, buf);
+            }
+            avio_seek(s->pb, position, SEEK_SET);
+        }
+    }
+}