codec_kate.c 9.11 KB
Newer Older
1
2
3
4
/* Ogginfo
 *
 * A tool to describe ogg file contents and metadata.
 *
5
 * This file handles kate streams.
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
 *
 * Copyright 2002-2005 Michael Smith <msmith@xiph.org>
 * Copyright 2020      Philipp Schafft <lion@lion.leolix.org>
 * Licensed under the GNU GPL, distributed with this program.
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdlib.h>
#include <string.h>

#include <ogg/ogg.h>

#ifdef HAVE_KATE
#include <kate/oggkate.h>
#endif

#include "i18n.h"

#include "private.h"

typedef struct {
#ifdef HAVE_KATE
    kate_info ki;
    kate_comment kc;
#else
    int num_headers;
#endif

    int major;
    int minor;
    char language[16];
    char category[16];

    ogg_int64_t bytes;
    ogg_int64_t lastgranulepos;
    ogg_int64_t firstgranulepos;

    int doneheaders;
} misc_kate_info;


static void kate_process(stream_processor *stream, ogg_page *page )
{
    ogg_packet packet;
    misc_kate_info *inf = stream->data;
    int header=0, packets=0;
    int res;
#ifdef HAVE_KATE
    int i;
    const char *encoding = NULL, *directionality = NULL;
#endif

    ogg_stream_pagein(&stream->os, page);
    if (!inf->doneheaders)
        header = 1;

    while (1) {
        res = ogg_stream_packetout(&stream->os, &packet);
        if (res < 0) {
           warn(_("WARNING: discontinuity in stream (%d)\n"), stream->num);
           continue;
        } else if (res == 0) {
            break;
        }

        packets++;
        if (!inf->doneheaders) {
#ifdef HAVE_KATE
            int ret = kate_ogg_decode_headerin(&inf->ki, &inf->kc, &packet);
            if (ret < 0) {
                warn(_("WARNING: Could not decode Kate header "
                            "packet %d - invalid Kate stream (%d)\n"),
                        packet.packetno, stream->num);
                continue;
            } else if (ret > 0) {
                inf->doneheaders=1;
            }
#else
            /* if we're not building against libkate, do some limited checks */
            if (packet.bytes<64 || memcmp(packet.packet+1, "kate\0\0\0", 7)) {
                warn(_("WARNING: packet %d does not seem to be a Kate header - "
                            "invalid Kate stream (%d)\n"),
                        packet.packetno, stream->num);
                continue;
            }
            if (packet.packetno==inf->num_headers) {
                inf->doneheaders=1;
            }
#endif

            if (packet.packetno==0) {
#ifdef HAVE_KATE
                inf->major = inf->ki.bitstream_version_major;
                inf->minor = inf->ki.bitstream_version_minor;
                memcpy(inf->language, inf->ki.language, 16);
                inf->language[15] = 0;
                memcpy(inf->category, inf->ki.category, 16);
                inf->category[15] = 0;
#else
                inf->major = packet.packet[9];
                inf->minor = packet.packet[10];
                inf->num_headers = packet.packet[11];
                memcpy(inf->language, packet.packet+32, 16);
                inf->language[15] = 0;
                memcpy(inf->category, packet.packet+48, 16);
                inf->category[15] = 0;
#endif
            }

            if (inf->doneheaders) {
                if (ogg_page_granulepos(page) != 0 || ogg_stream_packetpeek(&stream->os, NULL) == 1)
                    warn(_("WARNING: Kate stream %d does not have headers "
                                "correctly framed. Terminal header page contains "
                                "additional packets or has non-zero granulepos\n"),
                            stream->num);
                info(_("Kate headers parsed for stream %d, "
                            "information follows...\n"), stream->num);

                info(_("Version: %d.%d\n"), inf->major, inf->minor);
#ifdef HAVE_KATE
                info(_("Vendor: %s\n"), inf->kc.vendor);
#endif

                if (*inf->language) {
                    info(_("Language: %s\n"), inf->language);
                } else {
                    info(_("No language set\n"));
                }

                if (*inf->category) {
                    info(_("Category: %s\n"), inf->category);
                } else {
                    info(_("No category set\n"));
                }

#ifdef HAVE_KATE
                switch (inf->ki.text_encoding) {
                    case kate_utf8: encoding=_("utf-8"); break;
                    default: encoding=NULL; break;
                }

                if (encoding) {
                    info(_("Character encoding: %s\n"),encoding);
                } else {
                    info(_("Unknown character encoding\n"));
                }

                if (printlots) {
                    switch (inf->ki.text_directionality) {
                        case kate_l2r_t2b: directionality=_("left to right, top to bottom"); break;
                        case kate_r2l_t2b: directionality=_("right to left, top to bottom"); break;
                        case kate_t2b_r2l: directionality=_("top to bottom, right to left"); break;
                        case kate_t2b_l2r: directionality=_("top to bottom, left to right"); break;
                        default: directionality=NULL; break;
                    }

                    if (directionality) {
                        info(_("Text directionality: %s\n"),directionality);
                    } else {
                        info(_("Unknown text directionality\n"));
                    }

                    info("%u regions, %u styles, %u curves, %u motions, %u palettes,\n"
                            "%u bitmaps, %u font ranges, %u font mappings\n",
                            inf->ki.nregions, inf->ki.nstyles,
                            inf->ki.ncurves, inf->ki.nmotions,
                            inf->ki.npalettes, inf->ki.nbitmaps,
                            inf->ki.nfont_ranges, inf->ki.nfont_mappings);
                }

                if (inf->ki.gps_numerator == 0 || inf->ki.gps_denominator == 0) {
                    warn(_("Invalid zero granulepos rate\n"));
                } else {
                    info(_("Granulepos rate %d/%d (%.02f gps)\n"),
                            inf->ki.gps_numerator, inf->ki.gps_denominator,
                            (float)inf->ki.gps_numerator/(float)inf->ki.gps_denominator);
                }

                if (inf->kc.comments > 0)
                    info(_("User comments section follows...\n"));

                for (i=0; i < inf->kc.comments; i++) {
                    const char *comment = inf->kc.user_comments[i];
                    check_xiph_comment(stream, i, comment,
                            inf->kc.comment_lengths[i]);
                }
#endif
                info(_("\n"));
            }
        }
    }

    if (!header) {
        ogg_int64_t gp = ogg_page_granulepos(page);
        if (gp > 0) {
            if (gp < inf->lastgranulepos) {
                warn(_("WARNING: granulepos in stream %d decreases from %"
                        PRId64 " to %" PRId64 "\n" ),
                        stream->num, inf->lastgranulepos, gp);
            }
            inf->lastgranulepos = gp;
        } else if (packets && gp<0) { /* zero granpos on data is valid for kate */
            /* Only do this if we saw at least one packet ending on this page.
             * It's legal (though very unusual) to have no packets in a page at
             * all - this is occasionally used to have an empty EOS page */
            warn(_("Negative granulepos (%" PRId64 ") on Kate stream outside of headers. This file was created by a buggy encoder\n"), gp);
        }
        if (inf->firstgranulepos < 0) { /* Not set yet */
        }
        inf->bytes += page->header_len + page->body_len;
    }
}

#ifdef HAVE_KATE
static void kate_end(stream_processor *stream)
{
    misc_kate_info *inf = stream->data;
    long minutes, seconds, milliseconds;
    double bitrate, time;

    /* This should be lastgranulepos - startgranulepos, or something like that*/
    //time = (double)(inf->lastgranulepos>>inf->ki.granule_shift) * inf->ki.gps_denominator / inf->ki.gps_numerator;
    ogg_int64_t gbase=inf->lastgranulepos>>inf->ki.granule_shift;
    ogg_int64_t goffset=inf->lastgranulepos-(gbase<<inf->ki.granule_shift);
    time = (double)(gbase+goffset) / ((float)inf->ki.gps_numerator/(float)inf->ki.gps_denominator);
    minutes = (long)time / 60;
    seconds = (long)time - minutes*60;
    milliseconds = (long)((time - minutes*60 - seconds)*1000);
    bitrate = inf->bytes*8 / time / 1000.0;

    info(_("Kate stream %d:\n"
           "\tTotal data length: %" PRId64 " bytes\n"
           "\tPlayback length: %ldm:%02ld.%03lds\n"
           "\tAverage bitrate: %f kb/s\n"),
            stream->num,inf->bytes, minutes, seconds, milliseconds, bitrate);

    kate_comment_clear(&inf->kc);
    kate_info_clear(&inf->ki);

    free(stream->data);
}
#else
static void kate_end(stream_processor *stream)
{
}
#endif

void kate_start(stream_processor *stream)
{
    misc_kate_info *info;

    stream->type = "kate";
    stream->process_page = kate_process;
    stream->process_end = kate_end;

    stream->data = calloc(1, sizeof(misc_kate_info));

    info = stream->data;

#ifdef HAVE_KATE
    kate_comment_init(&info->kc);
    kate_info_init(&info->ki);
#endif
}