format_ogg.c 14.9 KB
Newer Older
1 2 3 4 5 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
/* Icecast
 *
 * This program is distributed under the GNU General Public License, version 2.
 * A copy of this license is included with this source.
 *
 * Copyright 2000-2004, Jack Moffitt <jack@xiph.org, 
 *                      Michael Smith <msmith@xiph.org>,
 *                      oddsock <oddsock@xiph.org>,
 *                      Karl Heyes <karl@xiph.org>
 *                      and others (see AUTHORS for details).
 */

/* format_ogg.c
 *
 * format plugin for Ogg
 *
 */

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

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

#include <ogg/ogg.h>

#include "refbuf.h"
#include "source.h"
#include "client.h"

#include "stats.h"
#include "format.h"
#include "format_ogg.h"
#include "format_vorbis.h"
#ifdef HAVE_THEORA
#include "format_theora.h"
#endif
Ed "oddsock" Zaleski's avatar
Ed "oddsock" Zaleski committed
40 41 42 43

#ifdef _WIN32
#define snprintf _snprintf
#endif
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

#define CATMODULE "format-ogg"
#include "logging.h"

struct _ogg_state_tag;

static void format_ogg_free_plugin (format_plugin_t *plugin);
static int  create_ogg_client_data(source_t *source, client_t *client);
static void format_ogg_send_headers(format_plugin_t *self,
        source_t *source, client_t *client);
static void free_ogg_client_data (client_t *client);

static void write_ogg_to_file (struct source_tag *source, refbuf_t *refbuf);
static refbuf_t *ogg_get_buffer (source_t *source);
static int write_buf_to_client (format_plugin_t *self, client_t *client);


struct ogg_client
{
    refbuf_t *headers;
    refbuf_t *header_page;
    unsigned pos;
    int headers_sent;
};


refbuf_t *make_refbuf_with_page (ogg_page *page)
{
    refbuf_t *refbuf = refbuf_new (page->header_len + page->body_len);

    memcpy (refbuf->data, page->header, page->header_len);
    memcpy (refbuf->data+page->header_len, page->body, page->body_len);
    return refbuf;
}


/* routine for taking the provided page (should be a header page) and
 * placing it on the collection of header pages
 */
void format_ogg_attach_header (ogg_state_t *ogg_info, ogg_page *page)
{
    refbuf_t *refbuf = make_refbuf_with_page (page);

    if (ogg_page_bos (page))
    {
        DEBUG0 ("attaching BOS page");
        if (*ogg_info->bos_end == NULL)
            ogg_info->header_pages_tail = refbuf;
        refbuf->next = *ogg_info->bos_end;
        *ogg_info->bos_end = refbuf;
        ogg_info->bos_end = &refbuf->next;
        return;
    }
    DEBUG0 ("attaching header page");
    if (ogg_info->header_pages_tail)
        ogg_info->header_pages_tail->next = refbuf;
    ogg_info->header_pages_tail = refbuf;

    if (ogg_info->header_pages == NULL)
        ogg_info->header_pages = refbuf;
}


void format_ogg_free_headers (ogg_state_t *ogg_info)
{
    refbuf_t *header;

    /* release the header pages first */
    DEBUG0 ("releasing header pages");
    header = ogg_info->header_pages;
    while (header)
    {
        refbuf_t *to_release = header;
        header = header->next;
        refbuf_release (to_release);
    }
    ogg_info->header_pages = NULL;
    ogg_info->header_pages_tail = NULL;
    ogg_info->bos_end = &ogg_info->header_pages;
}


/* release the memory used for the codec and header pages from the module */
static void free_ogg_codecs (ogg_state_t *ogg_info)
{
    ogg_codec_t *codec;

    if (ogg_info == NULL)
        return;

    format_ogg_free_headers (ogg_info);

    /* now free the codecs */
    codec = ogg_info->codecs;
    DEBUG0 ("freeing codecs");
    while (codec)
    {
        ogg_codec_t *next = codec->next;
        codec->codec_free (ogg_info, codec);
        codec = next;
    }
    ogg_info->codecs = NULL;
    ogg_info->current = NULL;
    ogg_info->bos_completed = 0;
}


int format_ogg_get_plugin (source_t *source)
{
    format_plugin_t *plugin;
    ogg_state_t *state = calloc (1, sizeof (ogg_state_t));

    plugin = (format_plugin_t *)calloc(1, sizeof(format_plugin_t));

    plugin->type = FORMAT_TYPE_OGG;
    plugin->get_buffer = ogg_get_buffer;
    plugin->write_buf_to_client = write_buf_to_client;
    plugin->write_buf_to_file = write_ogg_to_file;
    plugin->create_client_data = create_ogg_client_data;
    plugin->client_send_headers = format_ogg_send_headers;
    plugin->free_plugin = format_ogg_free_plugin;
    plugin->set_tag = NULL;
    plugin->contenttype = "application/ogg";

    ogg_sync_init (&state->oy);

    plugin->_state = state;
    source->format = plugin;
    state->mount = source->mount;
    state->bos_end = &state->header_pages;

    return 0;
}


void format_ogg_free_plugin (format_plugin_t *plugin)
{
    ogg_state_t *state = plugin->_state;

    /* free memory associated with this plugin instance */
    free_ogg_codecs (state);
    free (state->artist);
    free (state->title);

    ogg_sync_clear (&state->oy);
    free (state);

    free (plugin);
}


/* a new BOS page has been seen so check which codec it is */
static int process_initial_page (format_plugin_t *plugin, ogg_page *page)
{
    ogg_state_t *ogg_info = plugin->_state;
    ogg_codec_t *codec;

    if (ogg_info->bos_completed)
    {
        ogg_info->bitrate = 0;
        ogg_info->codec_sync = NULL;
        /* need to zap old list of codecs when next group of BOS pages appear */
        free_ogg_codecs (ogg_info);
    }
    do
    {
        codec = initial_vorbis_page (plugin, page);
        if (codec)
            break;
#ifdef HAVE_THEORA
        codec = initial_theora_page (plugin, page);
        if (codec)
            break;
#endif
        /* any others */
        INFO0 ("Seen BOS page with unknown type");
        return -1;
    } while (0);

    if (codec)
    {
        /* add codec to list */
        codec->next = ogg_info->codecs;
        ogg_info->codecs = codec;
    }

    return 0;
}


/* This is called when there has been a change in the metadata. Usually
 * artist and title are provided separately so here we update the stats
 * and write log entry if required.
 */
static void update_comments (source_t *source)
{
    ogg_state_t *ogg_info = source->format->_state;
    char *title = ogg_info->title;
    char *artist = ogg_info->artist;
    char *metadata = NULL;
    unsigned int len = 0;
245 246
    ogg_codec_t *codec;
    char codec_names [100] = "";
247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278

    if (ogg_info->artist)
    {
        if (title)
        {
            len += strlen(artist) + strlen(title) + 3;
            metadata = calloc (1, len);
            snprintf (metadata, len, "%s - %s", artist, title);
        }
        else
        {
            len += strlen(artist);
            metadata = calloc (1, len);
            snprintf (metadata, len, "%s", artist);
        }
    }
    else
    {
        if (title)
        {
            len += strlen (title);
            metadata = calloc (1, len);
            snprintf (metadata, len, "%s", title);
        }
    }
    if (metadata)
    {
        logging_playlist (source->mount, metadata, source->listeners);
        free (metadata);
    }
    stats_event (source->mount, "artist", artist);
    stats_event (source->mount, "title", title);
279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295

    codec = ogg_info->codecs;
    while (codec)
    {
        if (codec->name)
        {
            int len = strlen (codec_names);
            int remaining = sizeof (codec_names) - len;
            char *where = codec_names + len;
            char *separator = " ";
            if (len == 0)
                separator = "";
            snprintf (where, remaining, "%s%s", separator, codec->name);
        }
        codec = codec->next;
    }
    stats_event (source->mount, "subtype", codec_names);
296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588
    yp_touch (source->mount);
}


/* called when preparing a refbuf with audio data to be passed
 * back for queueing
 */
static refbuf_t *complete_buffer (source_t *source, refbuf_t *refbuf)
{
    ogg_state_t *ogg_info = source->format->_state;
    refbuf_t *header = ogg_info->header_pages;

    while (header)
    {
        refbuf_addref (header);
        header = header->next;
    }
    refbuf->associated = ogg_info->header_pages;

    if (ogg_info->log_metadata)
    {
        update_comments (source);
        ogg_info->log_metadata = 0;
    }
    /* listeners can start anywhere unless the codecs themselves are
     * marking starting points */
    if (ogg_info->codec_sync == NULL)
        refbuf->sync_point = 1;
    return refbuf;
}


/* process the incoming page. this requires searching through the
 * currently known codecs that have been seen in the stream
 */
static refbuf_t *process_ogg_page (ogg_state_t *ogg_info, ogg_page *page)
{
    ogg_codec_t *codec = ogg_info->codecs;
    refbuf_t *refbuf = NULL;

    while (codec)
    {
        if (ogg_page_serialno (page) == codec->os.serialno)
        {
            if (codec->process_page)
                refbuf = codec->process_page (ogg_info, codec, page);
            break;
        }

        codec = codec->next;
    }
    ogg_info->current = codec;
    return refbuf;
}


/* main plugin handler for getting a buffer for the queue. In here we
 * just add an incoming page to the codecs and process it until either
 * more data is needed or we prodice a buffer for the queue.
 */
static refbuf_t *ogg_get_buffer (source_t *source)
{
    ogg_state_t *ogg_info = source->format->_state;
    char *data = NULL;
    int bytes;

    while (1)
    {
        while (1)
        {
            ogg_page page;
            refbuf_t *refbuf;
            ogg_codec_t *codec = ogg_info->current;

            /* if a codec has just been given a page then process it */
            if (codec && codec->process)
            {
                refbuf = codec->process (ogg_info, codec);
                if (refbuf)
                    return complete_buffer (source, refbuf);

                ogg_info->current = NULL;
            }

            if (ogg_sync_pageout (&ogg_info->oy, &page) > 0)
            {
                if (ogg_page_bos (&page))
                {
                    process_initial_page (source->format, &page);
                    continue;
                }
                ogg_info->bos_completed = 1;
                refbuf = process_ogg_page (ogg_info, &page);
                if (ogg_info->error)
                {
                    ERROR0 ("Problem processing stream");
                    source->running = 0;
                    return NULL;
                }
                if (refbuf)
                    return complete_buffer (source, refbuf);
                continue;
            }
            /* need more stream data */
            break;
        }
        /* we need more data to continue getting pages */
        data = ogg_sync_buffer (&ogg_info->oy, 4096);

        bytes = sock_read_bytes (source->con->sock, data, 4096);
        if (bytes < 0)
        {
            if (sock_recoverable (sock_error()))
                return NULL;
            WARN0 ("source connection has died");
            ogg_sync_wrote (&ogg_info->oy, 0);
            source->running = 0;
            return NULL;
        }
        if (bytes == 0)
        {
            INFO1 ("End of Stream %s", source->mount);
            ogg_sync_wrote (&ogg_info->oy, 0);
            source->running = 0;
            return NULL;
        }
        ogg_sync_wrote (&ogg_info->oy, bytes);
    }
}


static int create_ogg_client_data (source_t *source, client_t *client) 
{
    struct ogg_client *client_data = calloc (1, sizeof (struct ogg_client));
    int ret = -1;

    if (client_data)
    {
        client_data->headers_sent = 1;
        client->format_data = client_data;
        client->free_client_data = free_ogg_client_data;
        ret = 0;
    }
    return ret;
}


static void free_ogg_client_data (client_t *client)
{
    free (client->format_data);
    client->format_data = NULL;
}


/* send out the header pages. These are for all codecs but are
 * in the order for the stream, ie BOS pages first
 */
static int send_ogg_headers (client_t *client, refbuf_t *headers)
{
    struct ogg_client *client_data = client->format_data;
    refbuf_t *refbuf;
    int written = 0;

    if (client_data->headers_sent)
    {
        client_data->header_page = headers;
        client_data->pos = 0;
        client_data->headers_sent = 0;
    }
    refbuf = client_data->header_page;
    while (refbuf)
    {
        char *data = refbuf->data + client_data->pos;
        unsigned len = refbuf->len - client_data->pos;
        int ret;

        ret = client_send_bytes (client, data, len);
        if (ret > 0)
           written += ret;
        if (ret < (int)len)
            return written ? written : -1;
        client_data->pos += ret;
        if (client_data->pos == refbuf->len)
        {
            refbuf = refbuf->next;
            client_data->header_page = refbuf;
            client_data->pos = 0;
        }
    }
    client_data->headers_sent = 1;
    client_data->headers = headers;
    return written;
}


/* main client write routine for sending ogg data. Each refbuf has a
 * single page so we only need to determine if there are new headers
 */
static int write_buf_to_client (format_plugin_t *self, client_t *client)
{
    refbuf_t *refbuf = client->refbuf;
    char *buf;
    unsigned len;
    struct ogg_client *client_data = client->format_data;
    int ret, written = 0;

    if (refbuf->next == NULL && client->pos == refbuf->len)
        return 0;

    if (refbuf->next && client->pos == refbuf->len)
    {
        client_set_queue (client, refbuf->next);
        refbuf = client->refbuf;
    }
    buf = refbuf->data + client->pos;
    len = refbuf->len - client->pos;
    do
    {
        if (client_data->headers != refbuf->associated)
        {
            ret = send_ogg_headers (client, refbuf->associated);
            if (client_data->headers_sent == 0)
                break;
            written += ret;
        }
        ret = client_send_bytes (client, buf, len);

        if (ret > 0)
            client->pos += ret;

        if (ret < (int)len)
            break;
        written += ret;
        /* we have now written the page(s) */
        ret = 0;
    } while (0);

    if (ret > 0)
       written += ret;
    return written;
}


static int write_ogg_data (struct source_tag *source, refbuf_t *refbuf)
{
    int ret = 1;

    if (fwrite (refbuf->data, 1, refbuf->len, source->dumpfile) != refbuf->len)
    {
        WARN0 ("Write to dump file failed, disabling");
        fclose (source->dumpfile);
        source->dumpfile = NULL;
        ret = 0;
    }
    return ret;
}


static void write_ogg_to_file (struct source_tag *source, refbuf_t *refbuf)
{
    ogg_state_t *ogg_info = source->format->_state;

    if (ogg_info->file_headers != refbuf->associated)
    {
        refbuf_t *header = refbuf->associated;
        while (header)
        {
            if (write_ogg_data (source, header) == 0)
                return;
            header = header->next;
        }
        ogg_info->file_headers = refbuf->associated;
    }
    write_ogg_data (source, refbuf);
}


static void format_ogg_send_headers(format_plugin_t *self,
        source_t *source, client_t *client)
{
    int bytes;

    client->respcode = 200;
    bytes = sock_write(client->con->sock, 
            "HTTP/1.0 200 OK\r\n" 
            "Content-Type: %s\r\n", 
            source->format->contenttype);

    if(bytes > 0) client->con->sent_bytes += bytes;

    format_send_general_headers(self, source, client);
}