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 static size_t cb_read(void *buf
, size_t size
, size_t nmemb
, void *datasource
)
38 return fread(buf
, size
, nmemb
, f
);
41 static int cb_seek(__a_unused
void *datasource
, ogg_int64_t offset
,
45 return fseek(f
, offset
, whence
);
48 /* don't do anything as vss still needs the open filehandle */
49 static int cb_close(__a_unused
void *datasource
)
54 static long cb_tell(void *datasource
)
60 static int ogg_open_callbacks(void *datasource
, OggVorbis_File
*vf
, ov_callbacks c
)
62 int ret
= ov_open_callbacks(datasource
, vf
,
63 NULL
, /* no initial buffer */
64 0, /* no initial bytes */
65 c
); /* the ov_open_callbacks */
67 /* FIXME: provide better error codes */
70 if (ret
== OV_ENOTVORBIS
)
72 if (ret
== OV_EVERSION
)
74 if (ret
== OV_EBADHEADER
)
82 static int ogg_save_header(FILE *file
, struct audio_format_info
*afi
)
86 afi
->header
= para_malloc(afi
->header_len
);
88 ret
= read(fileno(file
), afi
->header
, afi
->header_len
);
89 if (ret
== afi
->header_len
)
95 static int ogg_compute_header_len(FILE *file
, struct audio_format_info
*afi
)
97 int ret
, len
, in
= fileno(file
);
104 ogg_stream_state
*stream_in
= para_malloc(sizeof(ogg_stream_state
));
105 ogg_stream_state
*stream_out
= para_malloc(sizeof(ogg_stream_state
));
106 ogg_sync_state
*sync_in
= para_malloc(sizeof(ogg_sync_state
));
108 ogg_sync_init(sync_in
);
109 vorbis_info_init(&vi
);
110 vorbis_comment_init(&vc
);
111 buf
= ogg_sync_buffer(sync_in
, CHUNK_SIZE
);
112 len
= read(in
, buf
, CHUNK_SIZE
);
116 ogg_sync_wrote(sync_in
, len
);
117 ret
= -E_SYNC_PAGEOUT
;
118 if (ogg_sync_pageout(sync_in
, &page
) <= 0)
120 serial
= ogg_page_serialno(&page
);
121 ogg_stream_init(stream_in
, serial
);
122 ogg_stream_init(stream_out
, serial
);
123 ret
= ogg_stream_pagein(stream_in
, &page
);
125 ret
= E_STREAM_PAGEIN
;
128 ret
= ogg_stream_packetout(stream_in
, &packet
);
130 ret
= -E_STREAM_PACKETOUT
;
134 if (vorbis_synthesis_headerin(&vi
, &vc
, &packet
) < 0)
136 PARA_INFO_LOG("channels: %i, rate: %li\n", vi
.channels
, vi
.rate
);
137 ogg_stream_packetin(stream_out
, &packet
);
139 ret
= ogg_sync_pageout(sync_in
, &page
);
141 ret
= -E_SYNC_PAGEOUT
;
144 ogg_stream_pagein(stream_in
, &page
);
145 ogg_stream_packetout(stream_in
, &packet
);
146 ogg_stream_packetin(stream_out
, &packet
);
148 ret
= ogg_sync_pageout(sync_in
, &page
);
150 ret
= -E_SYNC_PAGEOUT
;
153 ogg_stream_pagein(stream_in
, &page
);
154 ogg_stream_packetout(stream_in
, &packet
);
155 ogg_stream_packetin(stream_out
, &packet
);
158 while (ogg_stream_flush(stream_out
, &page
))
159 afi
->header_len
+= page
.body_len
+ page
.header_len
;
160 PARA_INFO_LOG("header_len = %d\n", afi
->header_len
);
161 ret
= ogg_save_header(file
, afi
);
163 ogg_stream_destroy(stream_in
);
164 ogg_stream_destroy(stream_out
);
166 ogg_sync_destroy(sync_in
);
167 vorbis_info_clear(&vi
);
168 vorbis_comment_clear(&vc
);
173 * Alloc and fill array table of byte offsets. chunk_table[i] is the
174 * offset in the current input file at which the sample containing time i *
175 * CHUNK_TIME begins. Always successful.
177 static long unsigned ogg_compute_chunk_table(OggVorbis_File
*of
,
178 struct audio_format_info
*afi
, double time_total
)
181 ssize_t max_chunk_len
, pos
= 0, min
= 0, old_pos
;
182 long unsigned num_chunks
;
186 num
= time_total
/ chunk_time
+ 3;
187 PARA_DEBUG_LOG("chunk time: %g allocating %d chunk pointers\n",
189 afi
->chunk_table
= para_malloc(num
* sizeof(size_t));
190 afi
->chunk_table
[0] = 0;
192 for (i
= 1; ret
== 0; i
++) {
194 ret
= ov_time_seek(of
, i
* chunk_time
);
197 pos
= ov_raw_tell(of
);
198 diff
= pos
- old_pos
;
199 max_chunk_len
= PARA_MAX(max_chunk_len
, diff
);
200 min
= (i
== 1)? diff
: PARA_MIN(min
, diff
);
201 afi
->chunk_table
[i
] = pos
;
202 // if (i < 11 || !((i - 1) % 1000)|| i > num - 11)
203 // PARA_DEBUG_LOG("chunk #%d: %g secs, pos: %zd, "
204 // "size: %zd\n", i - 1,
205 // i * chunk_time, pos, pos - old_pos);
209 afi
->chunk_table
[i
] = pos
;
210 PARA_INFO_LOG("%lu chunks (%fs), max chunk: %zd, min chunk: %zd\n",
211 num_chunks
, chunk_time
, max_chunk_len
, min
);
216 * Init oggvorbis file and write some tech data to given pointers.
218 static int ogg_get_file_info(FILE *file
, struct audio_format_info
*afi
)
223 ogg_int64_t raw_total
;
224 long vi_sampling_rate
, vi_bitrate
;
226 static const ov_callbacks ovc
= {
227 .read_func
= cb_read
,
228 .seek_func
= cb_seek
,
229 .close_func
= cb_close
,
234 return -E_OGG_NO_FILE
;
235 ret
= ogg_compute_header_len(file
, afi
);
239 ret
= ogg_open_callbacks(file
, &of
, ovc
);
243 vi
= ov_info(&of
, 0);
246 time_total
= ov_time_total(&of
, -1);
247 raw_total
= ov_raw_total(&of
, -1);
248 afi
->seconds_total
= time_total
;
249 vi_sampling_rate
= vi
->rate
;
250 vi_bitrate
= ov_bitrate(&of
, 0);
252 afi
->chunks_total
= ogg_compute_chunk_table(&of
, afi
, time_total
);
254 sprintf(afi
->info_string
, "audio_file_info1:%lu x %lu, %ldkHz, "
255 "%d channels, %ldkbps\n"
256 "audio_file_info2: \n"
257 "audio_file_info3: \n",
258 afi
->chunks_total
, (long unsigned) (chunk_time
* 1000 * 1000),
259 vi_sampling_rate
/ 1000, vi
->channels
, vi_bitrate
/ 1000
262 afi
->chunk_tv
.tv_sec
= 0;
263 afi
->chunk_tv
.tv_usec
= 250 * 1000;
264 tv_scale(3, &afi
->chunk_tv
, &afi
->eof_tv
);
267 ov_clear(&of
); /* keeps the file open */
273 static const char* ogg_suffixes
[] = {"ogg", NULL
};
276 * the init function of the ogg vorbis audio format handler
278 * \param afh pointer to the struct to initialize
280 void ogg_init(struct audio_format_handler
*afh
)
282 afh
->get_file_info
= ogg_get_file_info
,
283 afh
->suffixes
= ogg_suffixes
;