/*
* Copyright (C) 1997-2007 Andre Noll <maan@systemlinux.org>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
+ * Licensed under the GPL v2. For licencing details see COPYING.
*/
/** \file vss.c the virtual streaming system
* senders.
*/
-#include "server.h"
#include <sys/mman.h> /* mmap */
#include <sys/time.h> /* gettimeofday */
+#include <sys/types.h>
+#include <dirent.h>
+
+#include "para.h"
+#include "afh.h"
+#include "server.h"
#include "server.cmdline.h"
-#include "afs.h"
+#include "afs_common.h"
#include "vss.h"
#include "send.h"
#include "error.h"
static int audio_file;
static char *map;
-#if 1
- void mp3_init(struct audio_format_handler *);
-#endif
+/* The mp3 audio format handler does not need any libs. */
+void mp3_init(struct audio_format_handler *);
#ifdef HAVE_OGGVORBIS
void ogg_init(struct audio_format_handler *);
#endif
/**
- * the list of supported audio formats
+ * The list of supported audio formats.
+ *
+ * We always define the full array of audio formats even if some audio formats
+ * were not compiled in. This is because for each audio file the number of its
+ * audio format is stored in the databse. We don't want that numbers to become
+ * stale just because the user installed a new version of paraslash that
+ * supports a different set of audio formats.
+ *
+ * It can still be easily detected whether an audio format is compiled in by
+ * checking if the init function pointer is not \p NULL.
*/
static struct audio_format_handler afl[] = {
-#if 1
{
.name = "mp3",
.init = mp3_init,
},
-#endif
-#ifdef HAVE_OGGVORBIS
{
.name = "ogg",
+#ifdef HAVE_OGGVORBIS
.init = ogg_init,
- },
#endif
-#ifdef HAVE_FAAD
+ },
{
.name = "aac",
+#ifdef HAVE_FAAD
.init = aac_afh_init,
- },
#endif
+ },
{
.name = NULL,
}
};
-/** iterate over each supported audio format */
-#define FOR_EACH_AUDIO_FORMAT(i) for (i = 0; afl[i].name; i++)
+static inline int next_audio_format(int format)
+{
+ for (;;) {
+ if (!afl[format].name)
+ return format;
+ format++;
+ if (afl[format].init)
+ return format;
+ }
+}
+
+/** Iterate over each supported audio format. */
+#define FOR_EACH_AUDIO_FORMAT(i) for (i = 0; afl[i].name; i = next_audio_format(i))
/**
}
/**
- * get the name of the given audio format
- * \param i the audio format number
+ * Get the name of the given audio format.
+ *
+ * \param i The audio format number.
*
* This returns a pointer to statically allocated memory so it
* must not be freed by the caller.
*/
const char *audio_format_name(int i)
{
+ //PARA_NOTICE_LOG("array size: %u¸ requested: %d\n", ARRAY_SIZE(afl), i);
+ assert(i < 0 || i < ARRAY_SIZE(afl) - 1);
return i >= 0? afl[i].name : "(none)";
}
{
int i;
char *hn = para_hostname(), *home = para_homedir();
+ long unsigned announce_time = conf.announce_time_arg > 0?
+ conf.announce_time_arg : 300,
+ autoplay_delay = conf.autoplay_delay_arg > 0?
+ conf.autoplay_delay_arg : 0;
PARA_DEBUG_LOG("supported audio formats: %s\n",
SUPPORTED_AUDIO_FORMATS);
- for (i = 0; afl[i].name; i++) {
+ FOR_EACH_AUDIO_FORMAT(i) {
PARA_NOTICE_LOG("initializing %s handler\n",
afl[i].name);
afl[i].init(&afl[i]);
}
- ms2tv(conf.announce_time_arg, &announce_tv);
+ ms2tv(announce_time, &announce_tv);
PARA_INFO_LOG("announce timeval: %lums\n", tv2ms(&announce_tv));
for (i = 0; senders[i].name; i++) {
PARA_NOTICE_LOG("initializing %s sender\n", senders[i].name);
mmd->vss_status_flags |= VSS_PLAYING;
mmd->new_vss_status_flags |= VSS_PLAYING;
gettimeofday(&now, NULL);
- ms2tv(conf.autoplay_delay_arg, &tmp);
+ ms2tv(autoplay_delay, &tmp);
tv_add(&now, &tmp, &autoplay_barrier);
}
}
return i;
}
}
- return -1;
+ return -E_BAD_AUDIO_FILE_SUFFIX;
}
static int get_audio_format(int omit)
return -E_AUDIO_FORMAT;
}
+/**
+ * Call get_file_info() to obtain an afhi structure.
+ *
+ * \param path The full path of the audio file.
+ * \param data Pointer to the contents of the (mapped) file.
+ * \param size The file size in bytes.
+ * \param afhi Result pointer.
+ *
+ * \return The number of the audio format on success, \p -E_AUDIO_FORMAT if no
+ * compiled in audio format handler is able to handler the file.
+ *
+ * This function tries to find an audio format handler that can interpret the
+ * file given by \a data and \a size.
+ *
+ * It first tries to determine the audio format from the filename given by \a
+ * path. If this doesn't work, all other audio format handlers are tried until
+ * one is found that can handle the file.
+ */
+int compute_afhi(const char *path, char *data, size_t size,
+ struct audio_format_info *afhi)
+{
+ int ret, i, format = guess_audio_format(path);
+
+ if (format >= 0) {
+ ret = afl[format].get_file_info(data, size, afhi);
+ if (ret >= 0)
+ return format;
+ }
+ FOR_EACH_AUDIO_FORMAT(i) {
+ if (i == format) /* we already tried this one to no avail */
+ continue;
+ ret = afl[i].get_file_info(data, size, afhi);
+ if (ret >= 0)
+ return i;
+ PARA_WARNING_LOG("%s\n", PARA_STRERROR(-ret));
+ }
+ return -E_AUDIO_FORMAT;
+}
+
/*
* upddate shared mem
*/
audio_file = open(sl[i], O_RDONLY);
if (audio_file < 0)
continue;
- if (fstat(audio_file, &file_status) == -1) {
+ if (fstat(audio_file, &file_status) == -1 ||
+ !file_status.st_size) {
close(audio_file);
continue;
}
mmd->size = file_status.st_size;
mmd->mtime = file_status.st_mtime;
- map = para_mmap(file_status.st_size, PROT_READ, MAP_PRIVATE,
+ map = para_mmap(mmd->size, PROT_READ, MAP_PRIVATE,
audio_file, 0);
strcpy(mmd->filename, sl[i]);
+ mmd->afi.header_len = 0; /* default: no header */
if (update_mmd() < 0) { /* invalid file */
close(audio_file);
munmap(map, mmd->size);
mmd->afi.seconds_total = 0;
free(mmd->afi.chunk_table);
mmd->afi.chunk_table = NULL;
- free(mmd->afi.header);
- mmd->afi.header = NULL;
tmp = make_message("%s:\n%s:\n%s:\n", status_item_list[SI_AUDIO_INFO1],
status_item_list[SI_AUDIO_INFO2], status_item_list[SI_AUDIO_INFO3]);
strcpy(mmd->afi.info_string, tmp);
}
/**
- * get the header and of the current audio file
+ * Get the header of the current audio file.
*
* \param header_len the length of the header is stored here
*
* treamtment.
*
*/
-char *vss_get_header(int *header_len)
+char *vss_get_header(size_t *header_len)
{
- if (mmd->audio_format < 0)
+ if (mmd->audio_format < 0 || !map || !mmd->afi.header_len)
return NULL;
*header_len = mmd->afi.header_len;
- return mmd->afi.header;
+ return map + mmd->afi.header_offset;
}
/**
return ret;
}
+static void get_chunk(long unsigned chunk_num, char **buf, size_t *len)
+{
+ size_t pos = mmd->afi.chunk_table[chunk_num];
+ *buf = map + pos;
+ *len = mmd->afi.chunk_table[chunk_num + 1] - pos;
+}
+
+/**
+ * Get the data of the given chunk.
+ *
+ * \param chunk_num The number of the desired chunk.
+ * \param buf Chunk data.
+ * \param len Chunk length in bytes.
+ *
+ * \return Positive on success, negative on errors.
+ */
+int vss_get_chunk(long unsigned chunk_num, char **buf, size_t *len)
+{
+ if (mmd->audio_format < 0 || !map || !vss_playing())
+ return -E_CHUNK;
+ if (chunk_num >= mmd->afi.chunks_total)
+ return -E_CHUNK;
+ get_chunk(chunk_num, buf, len);
+ return 1;
+}
+
/**
* main sending function
*
{
int i;
struct audio_format_handler *af;
- ssize_t pos, len;
struct timeval now, due;
if (mmd->audio_format < 0 || !map || !vss_playing())
mmd->new_vss_status_flags |= VSS_NEXT;
return vss_eof();
}
- pos = mmd->afi.chunk_table[mmd->current_chunk];
- len = mmd->afi.chunk_table[mmd->current_chunk + 1] - pos;
/*
* We call the send function also in case of empty chunks as they
* might have still some data queued which can be sent in this case.
mmd->offset = tv2ms(&tmp);
mmd->events++;
}
- for (i = 0; senders[i].name; i++)
- senders[i].send(mmd->current_chunk, mmd->chunks_sent,
- map + pos, len);
+ for (i = 0; senders[i].name; i++) {
+ char *buf;
+ size_t len;
+ get_chunk(mmd->current_chunk, &buf, &len);
+ senders[i].send(mmd->current_chunk, mmd->chunks_sent, buf, len);
+ }
mmd->new_vss_status_flags |= VSS_PLAYING;
mmd->chunks_sent++;
mmd->current_chunk++;
projects / paraslash.git / blobdiff