/*
* 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
*
- * This contains the audio sending part of para_server which is independent of
- * the current audio format, audio file selector and of the activated senders.
+ * This contains the audio streaming code of para_server which is independent
+ * of the current audio format, audio file selector and of the activated
+ * senders.
*/
-#include "server.h"
+#include <sys/mman.h> /* mmap */
#include <sys/time.h> /* gettimeofday */
-#include "server.cmdline.h"
-#include "db.h"
+#include <sys/types.h>
+#include <dirent.h>
+
+#include "para.h"
#include "afh.h"
+#include "server.h"
+#include "server.cmdline.h"
+#include "afs_common.h"
#include "vss.h"
#include "send.h"
#include "error.h"
#include "string.h"
+#include "fd.h"
extern const char *status_item_list[];
extern struct audio_file_selector selectors[];
extern struct sender senders[];
-static FILE *audio_file = NULL;
+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))
+
/**
* check if vss status flag \a P (playing) is set
}
/**
- * 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);
}
}
static int get_file_info(int i)
{
- return afl[i].get_file_info(audio_file, mmd->audio_file_info,
- &mmd->chunks_total, &mmd->seconds_total);
+ return afl[i].get_file_info(map, mmd->size, &mmd->afi);
}
/**
return i;
}
}
- return -1;
+ return -E_BAD_AUDIO_FILE_SUFFIX;
}
static int get_audio_format(int omit)
int i;
FOR_EACH_AUDIO_FORMAT(i) {
- if (i == omit || !afl[i].get_file_info)
+ if (i == omit)
continue;
- rewind(audio_file);
if (get_file_info(i) > 0)
return i;
- rewind(audio_file);
+ }
+ 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;
}
static int update_mmd(void)
{
int i;
- struct stat file_status;
i = guess_audio_format(mmd->filename);
if (i < 0 || get_file_info(i) < 0)
mmd->chunks_sent = 0;
mmd->current_chunk = 0;
mmd->offset = 0;
- if (fstat(fileno(audio_file), &file_status) == -1)
- return -E_FSTAT;
- mmd->size = file_status.st_size;
- mmd->mtime = file_status.st_mtime;
mmd->events++;
- PARA_NOTICE_LOG("next audio file: %s\n", mmd->filename);
return 1;
}
-static void get_song(void)
+static void vss_get_audio_file(void)
{
char **sl = selectors[mmd->selector_num].get_audio_file_list(10);
int i;
+ struct stat file_status;
if (!sl)
goto err_out;
PARA_INFO_LOG("trying %s\n", sl[i]);
if (strlen(sl[i]) >= _POSIX_PATH_MAX)
continue;
- audio_file = fopen(sl[i], "r");
- if (!audio_file)
+ audio_file = open(sl[i], O_RDONLY);
+ if (audio_file < 0)
+ continue;
+ 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(mmd->size, PROT_READ, MAP_PRIVATE,
+ audio_file, 0);
strcpy(mmd->filename, sl[i]);
- if (update_mmd() < 0) {
- fclose(audio_file);
- audio_file = NULL;
+ mmd->afi.header_len = 0; /* default: no header */
+ if (update_mmd() < 0) { /* invalid file */
+ close(audio_file);
+ munmap(map, mmd->size);
+ map = NULL;
continue;
}
mmd->num_played++;
if (selectors[mmd->selector_num].update_audio_file)
selectors[mmd->selector_num].update_audio_file(sl[i]);
- PARA_DEBUG_LOG("%s", "success\n");
+ PARA_NOTICE_LOG("next audio file: %s\n", mmd->filename);
mmd->new_vss_status_flags &= (~VSS_NEXT);
gettimeofday(&now, NULL);
tv_add(&now, &announce_tv, &data_send_barrier);
-
goto free;
}
- PARA_ERROR_LOG("%s", "no valid files found\n");
err_out:
+ PARA_ERROR_LOG("%s", "no valid files found\n");
mmd->new_vss_status_flags = VSS_NEXT;
free:
if (sl) {
{
struct timeval tmp;
- tv_scale(mmd->chunks_sent, &afl[mmd->audio_format].chunk_tv, &tmp);
+ tv_scale(mmd->chunks_sent, &mmd->afi.chunk_tv, &tmp);
tv_add(&tmp, &mmd->stream_start, due);
}
if (chk_barrier("data send", &now, &data_send_barrier,
&the_timeout, 1) < 0)
return &the_timeout;
- if (mmd->audio_format < 0 || !vss_playing() || !audio_file)
+ if (mmd->audio_format < 0 || !vss_playing() || !map)
return NULL;
vss_next_chunk_time(&next_chunk);
if (chk_barrier(afl[mmd->audio_format].name, &now, &next_chunk,
return &the_timeout;
}
-static void vss_eof(struct audio_format_handler *af)
+static void vss_eof(void)
{
struct timeval now;
int i;
char *tmp;
- if (!af || !audio_file) {
+ if (!map) {
for (i = 0; senders[i].name; i++)
senders[i].shutdown_clients();
return;
}
gettimeofday(&now, NULL);
- tv_add(&af->eof_tv, &now, &eof_barrier);
- af->close_audio_file();
- audio_file = NULL;
+ tv_add(&mmd->afi.eof_tv, &now, &eof_barrier);
+ munmap(map, mmd->size);
+ map = NULL;
+ close(audio_file);
mmd->audio_format = -1;
- af = NULL;
mmd->chunks_sent = 0;
mmd->offset = 0;
- mmd->seconds_total = 0;
+ mmd->afi.seconds_total = 0;
+ free(mmd->afi.chunk_table);
+ mmd->afi.chunk_table = 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->audio_file_info, tmp);
+ strcpy(mmd->afi.info_string, tmp);
free(tmp);
tmp = make_message("%s:\n%s:\n%s:\n", status_item_list[SI_DBINFO1],
status_item_list[SI_DBINFO2], status_item_list[SI_DBINFO3]);
}
/**
- * 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)
{
- *header_len = 0;
- if (mmd->audio_format < 0)
- return NULL;
- if (!afl[mmd->audio_format].get_header_info)
+ if (mmd->audio_format < 0 || !map || !mmd->afi.header_len)
return NULL;
- return afl[mmd->audio_format].get_header_info(header_len);
+ *header_len = mmd->afi.header_len;
+ return map + mmd->afi.header_offset;
}
/**
{
if (mmd->audio_format < 0)
return NULL;
- return &afl[mmd->audio_format].chunk_tv;
+ return &mmd->afi.chunk_tv;
}
/**
for (i = 0; senders[i].name; i++)
senders[i].shutdown_clients();
if (vss_next() && af) {
- vss_eof(af);
+ vss_eof();
return vss_compute_timeout();
}
if (vss_paused() || vss_repos()) {
struct timeval now;
gettimeofday(&now, NULL);
if (!vss_paused() || mmd->chunks_sent)
- tv_add(&af->eof_tv, &now, &eof_barrier);
+ tv_add(&mmd->afi.eof_tv, &now, &eof_barrier);
if (vss_repos())
tv_add(&now, &announce_tv, &data_send_barrier);
if (mmd->new_vss_status_flags & VSS_NOMORE)
}
mmd->chunks_sent = 0;
}
- if (af && vss_repos() && mmd->current_chunk != mmd->repos_request)
- af->reposition_stream(mmd->repos_request);
if (vss_repos()) {
mmd->new_vss_status_flags &= ~(VSS_REPOS);
mmd->current_chunk = mmd->repos_request;
}
ret = vss_compute_timeout();
- if (!ret && !audio_file && vss_playing() &&
+ if (!ret && !map && vss_playing() &&
!(mmd->new_vss_status_flags & VSS_NOMORE)) {
PARA_DEBUG_LOG("%s", "ready and playing, but no audio file\n");
- get_song();
+ vss_get_audio_file();
goto again;
}
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
*
* the current audio format handler to obtain a pointer to the data to be
* sent out as well as its length. This information is then passed to each
* supported sender's send() function which does the actual sending.
- *
- * Return value: Positive return value on success, zero on eof and negative
- * on errors.
*/
-
void vss_send_chunk(void)
{
int i;
struct audio_format_handler *af;
- char *buf;
- ssize_t ret;
struct timeval now, due;
- if (mmd->audio_format < 0 || !audio_file || !vss_playing())
+ if (mmd->audio_format < 0 || !map || !vss_playing())
return;
af = &afl[mmd->audio_format];
gettimeofday(&now, NULL);
if (chk_barrier("data send", &now, &data_send_barrier,
&due, 1) < 0)
return;
- buf = af->read_chunk(mmd->current_chunk, &ret);
mmd->new_vss_status_flags &= ~VSS_REPOS;
- if (!buf) {
- if (ret < 0)
- mmd->new_vss_status_flags = VSS_NEXT;
- else
- mmd->new_vss_status_flags |= VSS_NEXT;
- vss_eof(af);
- return;
+ if (mmd->current_chunk >= mmd->afi.chunks_total) { /* eof */
+ mmd->new_vss_status_flags |= VSS_NEXT;
+ return vss_eof();
}
+ /*
+ * 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.
+ */
if (!mmd->chunks_sent) {
struct timeval tmp;
gettimeofday(&mmd->stream_start, NULL);
- tv_scale(mmd->current_chunk, &af->chunk_tv, &tmp);
+ tv_scale(mmd->current_chunk, &mmd->afi.chunk_tv, &tmp);
mmd->offset = tv2ms(&tmp);
mmd->events++;
}
- for (i = 0; senders[i].name; i++)
- senders[i].send(mmd->current_chunk, mmd->chunks_sent, buf, ret);
+ 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++;
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