2 * Copyright (C) 2004-2007 Andre Noll <maan@systemlinux.org>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
18 /** \file ogg_afh.c para_server's ogg vorbis audio format handler */
22 #include <vorbis/codec.h>
23 #include <vorbis/vorbisfile.h>
25 #include "server.cmdline.h"
31 /** must be big enough to hold header */
32 #define CHUNK_SIZE 32768
33 static double chunk_time = 0.25;
35 struct ogg_datasource {
41 static size_t cb_read(void *buf, size_t size, size_t nmemb, void *datasource)
43 struct ogg_datasource *ods = datasource;
44 size_t copy = PARA_MIN(ods->numbytes - ods->fpos, size * nmemb),
48 memcpy(buf, ods->map + ods->fpos, copy);
49 // PARA_INFO_LOG("size: %zd, nmemb: %zd, ret: %zd\n", size, nmemb, ret);
50 ods->fpos += ret * size;
54 static int cb_seek(void *datasource, ogg_int64_t offset,
57 struct ogg_datasource *ods = datasource;
60 if (offset >= 0 && offset <= ods->numbytes) {
68 if (offset <= 0 && -offset <= ods->numbytes) {
69 ods->fpos = ods->numbytes + offset;
76 if ((offset >= 0 && offset + ods->fpos > ods->numbytes) ||
77 (offset < 0 && offset + ods->fpos < 0)) {
88 /* don't do anything as vss still needs the open filehandle */
89 static int cb_close(__a_unused void *datasource)
94 static long cb_tell(void *datasource)
96 struct ogg_datasource *ods = datasource;
97 return (unsigned long)ods->fpos;
100 static int ogg_open_callbacks(void *datasource, OggVorbis_File *vf, ov_callbacks c)
102 int ret = ov_open_callbacks(datasource, vf,
103 NULL, /* no initial buffer */
104 0, /* no initial bytes */
105 c); /* the ov_open_callbacks */
107 /* FIXME: provide better error codes */
110 if (ret == OV_ENOTVORBIS)
112 if (ret == OV_EVERSION)
114 if (ret == OV_EBADHEADER)
122 static void ogg_save_header(char *map, struct audio_format_info *afi)
124 afi->header = para_malloc(afi->header_len);
125 memcpy(afi->header, map, afi->header_len);
128 static int ogg_compute_header_len(char *map, off_t numbytes,
129 struct audio_format_info *afi)
131 int ret, len = PARA_MIN(numbytes, CHUNK_SIZE);
138 ogg_stream_state *stream_in = para_malloc(sizeof(ogg_stream_state));
139 ogg_stream_state *stream_out = para_malloc(sizeof(ogg_stream_state));
140 ogg_sync_state *sync_in = para_malloc(sizeof(ogg_sync_state));
142 ogg_sync_init(sync_in);
143 vorbis_info_init(&vi);
144 vorbis_comment_init(&vc);
145 buf = ogg_sync_buffer(sync_in, len);
146 memcpy(buf, map, len);
147 ogg_sync_wrote(sync_in, len);
148 ret = -E_SYNC_PAGEOUT;
149 if (ogg_sync_pageout(sync_in, &page) <= 0)
151 serial = ogg_page_serialno(&page);
152 ogg_stream_init(stream_in, serial);
153 ogg_stream_init(stream_out, serial);
154 ret = ogg_stream_pagein(stream_in, &page);
156 ret = E_STREAM_PAGEIN;
159 ret = ogg_stream_packetout(stream_in, &packet);
161 ret = -E_STREAM_PACKETOUT;
165 if (vorbis_synthesis_headerin(&vi, &vc, &packet) < 0)
167 PARA_INFO_LOG("channels: %i, rate: %li\n", vi.channels, vi.rate);
168 ogg_stream_packetin(stream_out, &packet);
170 ret = ogg_sync_pageout(sync_in, &page);
172 ret = -E_SYNC_PAGEOUT;
175 ogg_stream_pagein(stream_in, &page);
176 ogg_stream_packetout(stream_in, &packet);
177 ogg_stream_packetin(stream_out, &packet);
179 ret = ogg_sync_pageout(sync_in, &page);
181 ret = -E_SYNC_PAGEOUT;
184 ogg_stream_pagein(stream_in, &page);
185 ogg_stream_packetout(stream_in, &packet);
186 ogg_stream_packetin(stream_out, &packet);
189 while (ogg_stream_flush(stream_out, &page))
190 afi->header_len += page.body_len + page.header_len;
191 PARA_INFO_LOG("header_len = %d\n", afi->header_len);
192 ogg_save_header(map, afi);
195 ogg_stream_destroy(stream_in);
196 ogg_stream_destroy(stream_out);
198 ogg_sync_destroy(sync_in);
199 vorbis_info_clear(&vi);
200 vorbis_comment_clear(&vc);
205 * Alloc and fill array table of byte offsets. chunk_table[i] is the
206 * offset in the current input file at which the sample containing time i *
207 * CHUNK_TIME begins. Always successful.
209 static long unsigned ogg_compute_chunk_table(OggVorbis_File *of,
210 struct audio_format_info *afi, double time_total)
213 ssize_t max_chunk_len, pos = 0, min = 0, old_pos;
214 long unsigned num_chunks;
218 num = time_total / chunk_time + 3;
219 PARA_DEBUG_LOG("chunk time: %g allocating %d chunk pointers\n",
221 afi->chunk_table = para_malloc(num * sizeof(size_t));
222 afi->chunk_table[0] = 0;
224 for (i = 1; ret == 0; i++) {
226 ret = ov_time_seek(of, i * chunk_time);
229 pos = ov_raw_tell(of);
230 diff = pos - old_pos;
231 max_chunk_len = PARA_MAX(max_chunk_len, diff);
232 min = (i == 1)? diff : PARA_MIN(min, diff);
233 afi->chunk_table[i] = pos;
234 // if (i < 11 || !((i - 1) % 1000)|| i > num - 11)
235 // PARA_DEBUG_LOG("chunk #%d: %g secs, pos: %zd, "
236 // "size: %zd\n", i - 1,
237 // i * chunk_time, pos, pos - old_pos);
241 afi->chunk_table[i] = pos;
242 PARA_INFO_LOG("%lu chunks (%fs), max chunk: %zd, min chunk: %zd\n",
243 num_chunks, chunk_time, max_chunk_len, min);
248 * Init oggvorbis file and write some tech data to given pointers.
250 static int ogg_get_file_info(FILE *file, char *map, off_t numbytes,
251 struct audio_format_info *afi)
256 ogg_int64_t raw_total;
257 long vi_sampling_rate, vi_bitrate;
259 const ov_callbacks ovc = {
260 .read_func = cb_read,
261 .seek_func = cb_seek,
262 .close_func = cb_close,
265 struct ogg_datasource ods = {.map = map, .numbytes = numbytes, .fpos = 0};
267 ret = ogg_compute_header_len(map, numbytes, afi);
270 ret = ogg_open_callbacks(&ods, &of, ovc);
274 vi = ov_info(&of, 0);
277 time_total = ov_time_total(&of, -1);
278 raw_total = ov_raw_total(&of, -1);
279 afi->seconds_total = time_total;
280 vi_sampling_rate = vi->rate;
281 vi_bitrate = ov_bitrate(&of, 0);
282 afi->chunks_total = ogg_compute_chunk_table(&of, afi, time_total);
283 sprintf(afi->info_string, "audio_file_info1:%lu x %lu, %ldkHz, "
284 "%d channels, %ldkbps\n"
285 "audio_file_info2: \n"
286 "audio_file_info3: \n",
287 afi->chunks_total, (long unsigned) (chunk_time * 1000 * 1000),
288 vi_sampling_rate / 1000, vi->channels, vi_bitrate / 1000
290 afi->chunk_tv.tv_sec = 0;
291 afi->chunk_tv.tv_usec = 250 * 1000;
292 tv_scale(3, &afi->chunk_tv, &afi->eof_tv);
295 ov_clear(&of); /* keeps the file open */
301 static const char* ogg_suffixes[] = {"ogg", NULL};
304 * the init function of the ogg vorbis audio format handler
306 * \param afh pointer to the struct to initialize
308 void ogg_init(struct audio_format_handler *afh)
310 afh->get_file_info = ogg_get_file_info,
311 afh->suffixes = ogg_suffixes;