Fix para_strerror() and use osl() wrapper for osl library calls.
[paraslash.git] / ogg_afh.c
index 1df5fd6f68e2e17ce119324d24b371c0230005d8..40aa6b64e9e81d58345ee4039ca68cc6a466c764 100644 (file)
--- a/ogg_afh.c
+++ b/ogg_afh.c
@@ -1,19 +1,7 @@
 /*
- * Copyright (C) 2004-2007 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2004-2009 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 ogg_afh.c para_server's ogg vorbis audio format handler */
 
 #include <ogg/ogg.h>
 #include <vorbis/codec.h>
 #include <vorbis/vorbisfile.h>
+#include <osl.h>
 
-#include "server.cmdline.h"
-#include "server.h"
-#include "vss.h"
+#include "para.h"
+#include "afh.h"
 #include "error.h"
 #include "string.h"
+#include "afs.h"
+#include "server.h"
 
 /** must be big enough to hold header */
 #define CHUNK_SIZE 32768
 static double chunk_time = 0.25;
 
+/** describes a memory-mapped ogg vorbis file */
+struct ogg_datasource {
+       /** the memory mapping */
+       char *map;
+       /** this size of the mapping */
+       off_t numbytes;
+       /** the current position in the mapping */
+       off_t fpos;
+};
+
 static size_t cb_read(void *buf, size_t size, size_t nmemb, void *datasource)
 {
-       FILE *f = datasource;
-       return fread(buf, size, nmemb, f);
+       struct ogg_datasource *ods = datasource;
+       size_t copy, ret;
+
+       if (!size)
+               return 0;
+
+       assert(ods->numbytes >= ods->fpos);
+       ret = ods->numbytes - ods->fpos;
+       copy = PARA_MIN(ret, size * nmemb);
+       ret = copy / size;
+       if (!ret)
+               return 0;
+       memcpy(buf, ods->map + ods->fpos, copy);
+//     PARA_INFO_LOG("size: %zd, nmemb: %zd, ret: %zd\n", size, nmemb, ret);
+       ods->fpos += ret * size;
+       return ret;
 }
 
-static int cb_seek(__a_unused void *datasource, ogg_int64_t offset,
+static int cb_seek(void *datasource, ogg_int64_t offset,
                int whence)
 {
-       FILE *f = datasource;
-       return fseek(f, offset, whence);
+       struct ogg_datasource *ods = datasource;
+       switch (whence) {
+       case SEEK_SET:
+               if (offset >= 0 && offset <= ods->numbytes) {
+                       ods->fpos = offset;
+                       return 0;
+               }
+               errno = EINVAL;
+               return -1;
+               break;
+       case SEEK_END:
+               if (offset <= 0 && -offset <= ods->numbytes) {
+                       ods->fpos = ods->numbytes + offset;
+                       return 0;
+               }
+               errno = EINVAL;
+               return -1;
+               break;
+       case SEEK_CUR:
+               if ((offset >= 0 && offset + ods->fpos > ods->numbytes) ||
+                               (offset < 0 && offset + ods->fpos < 0)) {
+                       errno = EINVAL;
+                       return -1;
+               }
+               ods->fpos += offset;
+               return 0;
+       }
+       errno = EINVAL;
+       return -1;
 }
 
 /* don't do anything as vss still needs the open filehandle */
@@ -53,8 +94,8 @@ static int cb_close(__a_unused void *datasource)
 
 static long cb_tell(void *datasource)
 {
-       FILE *f = datasource;
-       return ftell(f);
+       struct ogg_datasource *ods = datasource;
+       return (unsigned long)ods->fpos;
 }
 
 static int ogg_open_callbacks(void *datasource, OggVorbis_File *vf, ov_callbacks c)
@@ -64,39 +105,28 @@ static int ogg_open_callbacks(void *datasource, OggVorbis_File *vf, ov_callbacks
                0, /* no initial bytes */
                c); /* the ov_open_callbacks */
 
-       /* FIXME: provide better error codes */
        if (ret == OV_EREAD)
                return -E_OGG_READ;
        if (ret == OV_ENOTVORBIS)
-               return -E_OGG_READ;
+               return -E_VORBIS;
        if (ret == OV_EVERSION)
-               return -E_OGG_READ;
+               return -E_OGG_VERSION;
        if (ret == OV_EBADHEADER)
-               return -E_OGG_READ;
+               return -E_OGG_BAD_HEADER;
        if (ret < 0)
-               return -E_OGG_READ;
+               return -E_OGG_UNKNOWN_ERROR;
        return 1;
 
 }
 
-static int ogg_save_header(FILE *file, struct audio_format_info *afi)
+static int ogg_compute_header_len(char *map, size_t numbytes,
+               struct afh_info *afhi)
 {
        int ret;
-
-       afi->header = para_malloc(afi->header_len);
-       rewind(file);
-       ret = read(fileno(file), afi->header, afi->header_len);
-       if (ret == afi->header_len)
-               return 1;
-       free(afi->header);
-       return -E_OGG_READ;
-}
-
-static int ogg_compute_header_len(FILE *file, struct audio_format_info *afi)
-{
-       int ret, len, in = fileno(file);
-       unsigned int serial;
+       size_t len = PARA_MIN(numbytes, (size_t)CHUNK_SIZE);
+       int serial;
        char *buf;
+
        ogg_page page;
        ogg_packet packet;
        vorbis_comment vc;
@@ -108,21 +138,21 @@ static int ogg_compute_header_len(FILE *file, struct audio_format_info *afi)
        ogg_sync_init(sync_in);
        vorbis_info_init(&vi);
        vorbis_comment_init(&vc);
-       buf = ogg_sync_buffer(sync_in, CHUNK_SIZE);
-       len = read(in, buf, CHUNK_SIZE);
-       ret = -E_OGG_READ;
-       if (len <= 0)
-               goto err1;
-       ogg_sync_wrote(sync_in, len);
+       buf = ogg_sync_buffer(sync_in, (long)len);
+       memcpy(buf, map, len);
+       ogg_sync_wrote(sync_in, (long)len);
        ret = -E_SYNC_PAGEOUT;
-       if (ogg_sync_pageout(sync_in, &page) <= 0)
+       if (ogg_sync_pageout(sync_in, &page) <= 0) {
+               free(stream_in);
+               free(stream_out);
                goto err1;
+       }
        serial = ogg_page_serialno(&page);
        ogg_stream_init(stream_in, serial);
        ogg_stream_init(stream_out, serial);
        ret = ogg_stream_pagein(stream_in, &page);
        if (ret < 0) {
-               ret = E_STREAM_PAGEIN;
+               ret = -E_STREAM_PAGEIN;
                goto err2;
        }
        ret = ogg_stream_packetout(stream_in, &packet);
@@ -133,9 +163,8 @@ static int ogg_compute_header_len(FILE *file, struct audio_format_info *afi)
        ret = -E_VORBIS;
        if (vorbis_synthesis_headerin(&vi, &vc, &packet) < 0)
                goto err2;
-       PARA_INFO_LOG("channels: %i, rate: %li\n", vi.channels, vi.rate);
+       PARA_DEBUG_LOG("channels: %i, rate: %li\n", vi.channels, vi.rate);
        ogg_stream_packetin(stream_out, &packet);
-
        ret = ogg_sync_pageout(sync_in, &page);
        if (ret <= 0) {
                ret = -E_SYNC_PAGEOUT;
@@ -154,11 +183,12 @@ static int ogg_compute_header_len(FILE *file, struct audio_format_info *afi)
        ogg_stream_packetout(stream_in, &packet);
        ogg_stream_packetin(stream_out, &packet);
 
-       afi->header_len = 0;
+       afhi->header_len = 0;
        while (ogg_stream_flush(stream_out, &page))
-               afi->header_len += page.body_len + page.header_len;
-       PARA_INFO_LOG("header_len = %d\n", afi->header_len);
-       ret = ogg_save_header(file, afi);
+               afhi->header_len += page.body_len + page.header_len;
+       PARA_DEBUG_LOG("header_len = %d\n", afhi->header_len);
+       afhi->header_offset = 0;
+       ret = 1;
 err2:
        ogg_stream_destroy(stream_in);
        ogg_stream_destroy(stream_out);
@@ -175,98 +205,96 @@ err1:
  * CHUNK_TIME begins. Always successful.
  */
 static long unsigned ogg_compute_chunk_table(OggVorbis_File *of,
-       struct audio_format_info *afi, double time_total)
+       struct afh_info *afhi, long unsigned time_total)
 {
        int i, ret, num;
-       ssize_t max_chunk_len, pos = 0, min = 0, old_pos;
        long unsigned num_chunks;
+       ogg_int64_t max = 0, min = 0, old_pos = 0;
 
-       old_pos = 0;
-       ret = 0;
        num = time_total / chunk_time + 3;
        PARA_DEBUG_LOG("chunk time: %g allocating %d chunk pointers\n",
                chunk_time, num);
-       afi->chunk_table = para_malloc(num * sizeof(size_t));
-       afi->chunk_table[0] = 0;
-       max_chunk_len = 0;
-       for (i = 1; ret == 0; i++) {
-               ogg_int64_t diff;
+       afhi->chunk_table = para_malloc((num + 1) * sizeof(size_t));
+       afhi->chunk_table[0] = 0;
+       for (i = 1; i <= num; i++) {
+               ogg_int64_t diff, pos;
                ret = ov_time_seek(of, i * chunk_time);
                if (ret)
                        break;
                pos = ov_raw_tell(of);
                diff = pos - old_pos;
-               max_chunk_len = PARA_MAX(max_chunk_len, diff);
+               max = PARA_MAX(max, diff);
                min = (i == 1)? diff : PARA_MIN(min, diff);
-               afi->chunk_table[i] = pos;
-//             if (i < 11 || !((i - 1) % 1000)|| i > num - 11)
-//                     PARA_DEBUG_LOG("chunk #%d: %g secs, pos: %zd, "
-//                             "size: %zd\n", i - 1,
-//                             i * chunk_time, pos, pos - old_pos);
+               afhi->chunk_table[i] = pos;
                old_pos = pos;
        }
        num_chunks = i - 1;
-       afi->chunk_table[i] = pos;
-       PARA_INFO_LOG("%lu chunks (%fs), max chunk: %zd, min chunk: %zd\n",
-               num_chunks, chunk_time, max_chunk_len, min);
+       PARA_DEBUG_LOG("%lu chunks (%fs), max chunk: %lld, min chunk: %lld\n",
+               num_chunks, chunk_time, (long long)max, (long long)min);
        return num_chunks;
 }
 
+static void ogg_write_info_string(OggVorbis_File *vf, struct afh_info *afhi)
+{
+       char *taginfo;
+       vorbis_comment *vc = ov_comment(vf,-1);
+
+       if (vc) {
+               char *artist, *title, *album, *year, *comment;
+               artist = vorbis_comment_query(vc, "artist", 0);
+               title = vorbis_comment_query(vc, "title", 0);
+               album = vorbis_comment_query(vc, "album", 0);
+               year = vorbis_comment_query(vc, "year", 0);
+               comment = vorbis_comment_query(vc, "comment", 0);
+               taginfo = make_taginfo(title, artist, album, year, comment);
+       } else
+               taginfo = make_message("%s: (no vorbis comments found)\n%s:\n",
+                       status_item_list[SI_TAGINFO1],
+                       status_item_list[SI_TAGINFO2]);
+       afhi->info_string = make_message("%s:\n%s",
+               status_item_list[SI_AUDIO_FILE_INFO], taginfo);
+       free(taginfo);
+}
+
 /*
  * Init oggvorbis file and write some tech data to given pointers.
  */
-static int ogg_get_file_info(FILE *file, struct audio_format_info *afi)
+static int ogg_get_file_info(char *map, size_t numbytes, __a_unused int fd,
+               struct afh_info *afhi)
 {
        int ret;
-       double time_total;
        vorbis_info *vi;
-       ogg_int64_t raw_total;
-       long vi_sampling_rate, vi_bitrate;
        OggVorbis_File of;
-       static const ov_callbacks ovc = {
+       const ov_callbacks ovc = {
                .read_func = cb_read,
                .seek_func = cb_seek,
                .close_func = cb_close,
                .tell_func = cb_tell
        };
+       struct ogg_datasource ods = {.map = map, .numbytes = numbytes, .fpos = 0};
 
-       if (!file)
-               return -E_OGG_NO_FILE;
-       ret = ogg_compute_header_len(file, afi);
+       ret = ogg_compute_header_len(map, numbytes, afhi);
        if (ret < 0)
                return ret;
-       rewind(file);
-       ret = ogg_open_callbacks(file, &of, ovc);
+       ret = ogg_open_callbacks(&ods, &of, ovc);
        if (ret < 0)
                goto err;
        ret = -E_OGG_INFO;
        vi = ov_info(&of, 0);
        if (!vi)
                goto err;
-       time_total = ov_time_total(&of, -1);
-       raw_total = ov_raw_total(&of, -1);
-       afi->seconds_total = time_total;
-       vi_sampling_rate = vi->rate;
-       vi_bitrate = ov_bitrate(&of, 0);
-       rewind(file);
-       afi->chunks_total = ogg_compute_chunk_table(&of, afi, time_total);
-       rewind(file);
-       sprintf(afi->info_string, "audio_file_info1:%lu x %lu, %ldkHz, "
-               "%d channels, %ldkbps\n"
-               "audio_file_info2: \n"
-               "audio_file_info3: \n",
-               afi->chunks_total, (long unsigned) (chunk_time * 1000 * 1000),
-               vi_sampling_rate / 1000, vi->channels, vi_bitrate / 1000
-               );
-       rewind(file);
-       afi->chunk_tv.tv_sec = 0;
-       afi->chunk_tv.tv_usec = 250 * 1000;
-       tv_scale(3, &afi->chunk_tv, &afi->eof_tv);
+       afhi->seconds_total = ov_time_total(&of, -1);
+       afhi->frequency = vi->rate;
+       afhi->bitrate = ov_bitrate(&of, 0) / 1000;
+       afhi->channels = vi->channels;
+       afhi->chunks_total = ogg_compute_chunk_table(&of, afhi, afhi->seconds_total);
+       afhi->chunk_tv.tv_sec = 0;
+       afhi->chunk_tv.tv_usec = 250 * 1000;
+       tv_scale(10 / afhi->channels, &afhi->chunk_tv, &afhi->eof_tv);
+       ogg_write_info_string(&of, afhi);
        ret = 1;
 err:
        ov_clear(&of); /* keeps the file open */
-       if (ret < 0)
-               free(afi->header);
        return ret;
 }