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;
36 static struct audio_format_handler *af;
38 static size_t cb_read(void *buf, size_t size, size_t nmemb, void *datasource)
41 return fread(buf, size, nmemb, f);
44 static int cb_seek(__a_unused void *datasource, ogg_int64_t offset,
48 return fseek(f, offset, whence);
51 /* don't do anything as vss still needs the open filehandle */
52 static int cb_close(__a_unused void *datasource)
57 long cb_tell(void *datasource)
63 int ogg_open_callbacks(void *datasource, OggVorbis_File *vf, ov_callbacks c)
65 int ret = ov_open_callbacks(datasource, vf,
66 NULL, /* no initial buffer */
67 0, /* no initial bytes */
68 c); /* the ov_open_callbacks */
70 /* FIXME: provide better error codes */
73 if (ret == OV_ENOTVORBIS)
75 if (ret == OV_EVERSION)
77 if (ret == OV_EBADHEADER)
85 static int ogg_save_header(FILE *file, struct audio_format_info *afi)
89 afi->header = para_malloc(afi->header_len);
91 ret = read(fileno(file), afi->header, afi->header_len);
92 if (ret == afi->header_len)
98 static int ogg_compute_header_len(FILE *file, struct audio_format_info *afi)
100 int ret, len, in = fileno(file);
107 ogg_stream_state *stream_in = para_malloc(sizeof(ogg_stream_state));
108 ogg_stream_state *stream_out = para_malloc(sizeof(ogg_stream_state));
109 ogg_sync_state *sync_in = para_malloc(sizeof(ogg_sync_state));
111 ogg_sync_init(sync_in);
112 vorbis_info_init(&vi);
113 vorbis_comment_init(&vc);
114 buf = ogg_sync_buffer(sync_in, CHUNK_SIZE);
115 len = read(in, buf, CHUNK_SIZE);
119 ogg_sync_wrote(sync_in, len);
120 ret = -E_SYNC_PAGEOUT;
121 if (ogg_sync_pageout(sync_in, &page) <= 0)
123 serial = ogg_page_serialno(&page);
124 ogg_stream_init(stream_in, serial);
125 ogg_stream_init(stream_out, serial);
126 ret = ogg_stream_pagein(stream_in, &page);
128 ret = E_STREAM_PAGEIN;
131 ret = ogg_stream_packetout(stream_in, &packet);
133 ret = -E_STREAM_PACKETOUT;
137 if (vorbis_synthesis_headerin(&vi, &vc, &packet) < 0)
139 PARA_INFO_LOG("channels: %i, rate: %li\n", vi.channels, vi.rate);
140 ogg_stream_packetin(stream_out, &packet);
142 ret = ogg_sync_pageout(sync_in, &page);
144 ret = -E_SYNC_PAGEOUT;
147 ogg_stream_pagein(stream_in, &page);
148 ogg_stream_packetout(stream_in, &packet);
149 ogg_stream_packetin(stream_out, &packet);
151 ret = ogg_sync_pageout(sync_in, &page);
153 ret = -E_SYNC_PAGEOUT;
156 ogg_stream_pagein(stream_in, &page);
157 ogg_stream_packetout(stream_in, &packet);
158 ogg_stream_packetin(stream_out, &packet);
161 while (ogg_stream_flush(stream_out, &page))
162 afi->header_len += page.body_len + page.header_len;
163 PARA_INFO_LOG("header_len = %d\n", afi->header_len);
164 ret = ogg_save_header(file, afi);
166 ogg_stream_destroy(stream_in);
167 ogg_stream_destroy(stream_out);
169 ogg_sync_destroy(sync_in);
170 vorbis_info_clear(&vi);
171 vorbis_comment_clear(&vc);
176 * Alloc and fill array table of byte offsets. chunk_table[i] is the
177 * offset in the current input file at which the sample containing time i *
178 * CHUNK_TIME begins. Always successful.
180 static long unsigned ogg_compute_chunk_table(OggVorbis_File *of,
181 struct audio_format_info *afi, double time_total)
184 ssize_t max_chunk_len, pos = 0, min = 0, old_pos;
185 long unsigned num_chunks;
189 num = time_total / chunk_time + 3;
190 PARA_DEBUG_LOG("chunk time: %g allocating %d chunk pointers\n",
192 afi->chunk_table = para_malloc(num * sizeof(size_t));
193 afi->chunk_table[0] = 0;
195 for (i = 1; ret == 0; i++) {
197 ret = ov_time_seek(of, i * chunk_time);
200 pos = ov_raw_tell(of);
201 diff = pos - old_pos;
202 max_chunk_len = PARA_MAX(max_chunk_len, diff);
203 min = (i == 1)? diff : PARA_MIN(min, diff);
204 afi->chunk_table[i] = pos;
205 if (i < 11 || !((i - 1) % 1000)|| i > num - 11)
206 PARA_DEBUG_LOG("chunk #%d: %g secs, pos: %zd, "
207 "size: %zd\n", i - 1,
208 i * chunk_time, pos, pos - old_pos);
212 afi->chunk_table[i] = pos;
213 PARA_INFO_LOG("%lu chunks (%fs), max chunk: %zd, min chunk: %zd\n",
214 num_chunks, chunk_time, max_chunk_len, min);
218 static void ogg_close_audio_file(void)
224 * Init oggvorbis file and write some tech data to given pointers.
226 static int ogg_get_file_info(FILE *file, struct audio_format_info *afi)
231 ogg_int64_t raw_total;
232 long vi_sampling_rate, vi_bitrate;
234 static const ov_callbacks ovc = {
235 .read_func = cb_read,
236 .seek_func = cb_seek,
237 .close_func = cb_close,
242 return -E_OGG_NO_FILE;
243 ret = ogg_compute_header_len(file, afi);
247 ret = ogg_open_callbacks(file, &of, ovc);
251 vi = ov_info(&of, 0);
254 time_total = ov_time_total(&of, -1);
255 raw_total = ov_raw_total(&of, -1);
256 afi->seconds_total = time_total;
257 vi_sampling_rate = vi->rate;
258 vi_bitrate = ov_bitrate(&of, 0);
260 afi->chunks_total = ogg_compute_chunk_table(&of, afi, time_total);
262 sprintf(afi->info_string, "audio_file_info1:%lu x %lu, %ldkHz, "
263 "%d channels, %ldkbps\n"
264 "audio_file_info2: \n"
265 "audio_file_info3: \n",
266 afi->chunks_total, (long unsigned) (chunk_time * 1000 * 1000),
267 vi_sampling_rate / 1000, vi->channels, vi_bitrate / 1000
271 afi->chunk_tv.tv_sec = 0;
272 afi->chunk_tv.tv_usec = 250 * 1000;
273 tv_scale(3, &afi->chunk_tv, &afi->eof_tv);
276 ov_clear(&of); /* keeps the file open */
282 static const char* ogg_suffixes[] = {"ogg", NULL};
285 * the init function of the ogg vorbis audio format handler
287 * \param p pointer to the struct to initialize
289 void ogg_init(struct audio_format_handler *p)
292 af->get_file_info = ogg_get_file_info,
293 af->close_audio_file = ogg_close_audio_file;
294 af->suffixes = ogg_suffixes;