X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=vss.c;h=2de7a30c7bdc328cc82041135918a70da02c9578;hp=b34703de5bd8b8fb46a99a87587c77f86e0ca617;hb=cdef208272294b567ec80b9defd60e57a0eb2587;hpb=c85690666e2ed2327e751b819970658d58479bfb diff --git a/vss.c b/vss.c index b34703de..2de7a30c 100644 --- a/vss.c +++ b/vss.c @@ -1,36 +1,28 @@ /* * Copyright (C) 1997-2007 Andre Noll * - * 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 "para.h" +#include "afh.h" #include "server.h" +#include /* mmap */ #include /* gettimeofday */ #include "server.cmdline.h" -#include "afs.h" -#include "afh.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[]; @@ -43,11 +35,11 @@ extern struct misc_meta_data *mmd; 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 *); @@ -57,34 +49,54 @@ static FILE *audio_file = NULL; #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 @@ -133,6 +145,7 @@ unsigned int vss_paused(void) /** * get the name of the given audio format + * * \param i the audio format number * * This returns a pointer to statically allocated memory so it @@ -153,15 +166,19 @@ void vss_init(void) { 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); @@ -174,15 +191,14 @@ void vss_init(void) 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); } /** @@ -220,12 +236,49 @@ 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; } @@ -236,7 +289,6 @@ static int get_audio_format(int omit) 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) @@ -247,19 +299,15 @@ static int update_mmd(void) 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; @@ -268,27 +316,37 @@ static void get_song(void) 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) { @@ -316,7 +374,7 @@ static void vss_next_chunk_time(struct timeval *due) { 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); } @@ -344,7 +402,7 @@ static struct timeval *vss_compute_timeout(void) 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, @@ -356,29 +414,31 @@ static struct timeval *vss_compute_timeout(void) 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]); @@ -390,7 +450,7 @@ static void vss_eof(struct audio_format_handler *af) } /** - * 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 * @@ -399,14 +459,12 @@ static void vss_eof(struct audio_format_handler *af) * treamtment. * */ -char *vss_get_header(int *header_len) +char *vss_get_header(size_t *header_len) { - *header_len = 0; - if (mmd->audio_format < 0) + if (mmd->audio_format < 0 || !map || !mmd->afi.header_len) return NULL; - if (!afl[mmd->audio_format].get_header_info) - return NULL; - return afl[mmd->audio_format].get_header_info(header_len); + *header_len = mmd->afi.header_len; + return map + mmd->afi.header_offset; } /** @@ -431,7 +489,7 @@ struct timeval *vss_chunk_time(void) { if (mmd->audio_format < 0) return NULL; - return &afl[mmd->audio_format].chunk_tv; + return &mmd->afi.chunk_tv; } /** @@ -464,7 +522,7 @@ again: 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()) { @@ -474,7 +532,7 @@ again: 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) @@ -482,22 +540,46 @@ again: } 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 * @@ -506,20 +588,14 @@ again: * 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); @@ -531,25 +607,28 @@ void vss_send_chunk(void) 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++;