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;
37 static size_t cb_read(void *buf
, size_t size
, size_t nmemb
, void *datasource
)
40 return fread(buf
, size
, nmemb
, f
);
43 static int cb_seek(__a_unused
void *datasource
, ogg_int64_t offset
,
47 return fseek(f
, offset
, whence
);
50 /* don't do anything as vss still needs the open filehandle */
51 static int cb_close(__a_unused
void *datasource
)
56 long cb_tell(void *datasource
)
62 int ogg_open_callbacks(void *datasource
, OggVorbis_File
*vf
, ov_callbacks c
)
64 int ret
= ov_open_callbacks(datasource
, vf
,
65 NULL
, /* no initial buffer */
66 0, /* no initial bytes */
67 c
); /* the ov_open_callbacks */
69 /* FIXME: provide better error codes */
72 if (ret
== OV_ENOTVORBIS
)
74 if (ret
== OV_EVERSION
)
76 if (ret
== OV_EBADHEADER
)
84 static int ogg_save_header(FILE *file
, struct audio_format_info
*afi
)
88 afi
->header
= para_malloc(afi
->header_len
);
90 ret
= read(fileno(file
), afi
->header
, afi
->header_len
);
91 if (ret
== afi
->header_len
)
97 static int ogg_compute_header_len(FILE *file
, struct audio_format_info
*afi
)
99 int ret
, len
, in
= fileno(file
);
106 ogg_stream_state
*stream_in
= para_malloc(sizeof(ogg_stream_state
));
107 ogg_stream_state
*stream_out
= para_malloc(sizeof(ogg_stream_state
));
108 ogg_sync_state
*sync_in
= para_malloc(sizeof(ogg_sync_state
));
110 ogg_sync_init(sync_in
);
111 vorbis_info_init(&vi
);
112 vorbis_comment_init(&vc
);
113 buf
= ogg_sync_buffer(sync_in
, CHUNK_SIZE
);
114 len
= read(in
, buf
, CHUNK_SIZE
);
118 ogg_sync_wrote(sync_in
, len
);
119 ret
= -E_SYNC_PAGEOUT
;
120 if (ogg_sync_pageout(sync_in
, &page
) <= 0)
122 serial
= ogg_page_serialno(&page
);
123 ogg_stream_init(stream_in
, serial
);
124 ogg_stream_init(stream_out
, serial
);
125 ret
= ogg_stream_pagein(stream_in
, &page
);
127 ret
= E_STREAM_PAGEIN
;
130 ret
= ogg_stream_packetout(stream_in
, &packet
);
132 ret
= -E_STREAM_PACKETOUT
;
136 if (vorbis_synthesis_headerin(&vi
, &vc
, &packet
) < 0)
138 PARA_INFO_LOG("channels: %i, rate: %li\n", vi
.channels
, vi
.rate
);
139 ogg_stream_packetin(stream_out
, &packet
);
141 ret
= ogg_sync_pageout(sync_in
, &page
);
143 ret
= -E_SYNC_PAGEOUT
;
146 ogg_stream_pagein(stream_in
, &page
);
147 ogg_stream_packetout(stream_in
, &packet
);
148 ogg_stream_packetin(stream_out
, &packet
);
150 ret
= ogg_sync_pageout(sync_in
, &page
);
152 ret
= -E_SYNC_PAGEOUT
;
155 ogg_stream_pagein(stream_in
, &page
);
156 ogg_stream_packetout(stream_in
, &packet
);
157 ogg_stream_packetin(stream_out
, &packet
);
160 while (ogg_stream_flush(stream_out
, &page
))
161 afi
->header_len
+= page
.body_len
+ page
.header_len
;
162 PARA_INFO_LOG("header_len = %d\n", afi
->header_len
);
163 ret
= ogg_save_header(file
, afi
);
165 ogg_stream_destroy(stream_in
);
166 ogg_stream_destroy(stream_out
);
168 ogg_sync_destroy(sync_in
);
169 vorbis_info_clear(&vi
);
170 vorbis_comment_clear(&vc
);
175 * Alloc and fill array table of byte offsets. chunk_table[i] is the
176 * offset in the current input file at which the sample containing time i *
177 * CHUNK_TIME begins. Always successful.
179 static long unsigned ogg_compute_chunk_table(OggVorbis_File
*of
,
180 struct audio_format_info
*afi
, double time_total
)
183 ssize_t max_chunk_len
, pos
= 0, min
= 0, old_pos
;
184 long unsigned num_chunks
;
188 num
= time_total
/ chunk_time
+ 3;
189 PARA_DEBUG_LOG("chunk time: %g allocating %d chunk pointers\n",
191 afi
->chunk_table
= para_malloc(num
* sizeof(size_t));
192 afi
->chunk_table
[0] = 0;
194 for (i
= 1; ret
== 0; i
++) {
196 ret
= ov_time_seek(of
, i
* chunk_time
);
199 pos
= ov_raw_tell(of
);
200 diff
= pos
- old_pos
;
201 max_chunk_len
= PARA_MAX(max_chunk_len
, diff
);
202 min
= (i
== 1)? diff
: PARA_MIN(min
, diff
);
203 afi
->chunk_table
[i
] = pos
;
204 if (i
< 11 || !((i
- 1) % 1000)|| i
> num
- 11)
205 PARA_DEBUG_LOG("chunk #%d: %g secs, pos: %zd, "
206 "size: %zd\n", i
- 1,
207 i
* chunk_time
, pos
, pos
- old_pos
);
211 afi
->chunk_table
[i
] = pos
;
212 PARA_INFO_LOG("%lu chunks (%fs), max chunk: %zd, min chunk: %zd\n",
213 num_chunks
, chunk_time
, max_chunk_len
, min
);
217 static void ogg_close_audio_file(void)
223 * Init oggvorbis file and write some tech data to given pointers.
225 static int ogg_get_file_info(FILE *file
, struct audio_format_info
*afi
)
230 ogg_int64_t raw_total
;
231 long vi_sampling_rate
, vi_bitrate
;
233 static const ov_callbacks ovc
= {
234 .read_func
= cb_read
,
235 .seek_func
= cb_seek
,
236 .close_func
= cb_close
,
241 return -E_OGG_NO_FILE
;
242 ret
= ogg_compute_header_len(file
, afi
);
246 ret
= ogg_open_callbacks(file
, &of
, ovc
);
250 vi
= ov_info(&of
, 0);
253 time_total
= ov_time_total(&of
, -1);
254 raw_total
= ov_raw_total(&of
, -1);
255 afi
->seconds_total
= time_total
;
256 vi_sampling_rate
= vi
->rate
;
257 vi_bitrate
= ov_bitrate(&of
, 0);
259 afi
->chunks_total
= ogg_compute_chunk_table(&of
, afi
, time_total
);
261 sprintf(afi
->info_string
, "audio_file_info1:%lu x %lu, %ldkHz, "
262 "%d channels, %ldkbps\n"
263 "audio_file_info2: \n"
264 "audio_file_info3: \n",
265 afi
->chunks_total
, (long unsigned) (chunk_time
* 1000 * 1000),
266 vi_sampling_rate
/ 1000, vi
->channels
, vi_bitrate
/ 1000
270 afi
->chunk_tv
.tv_sec
= 0;
271 afi
->chunk_tv
.tv_usec
= 250 * 1000;
272 tv_scale(3, &afi
->chunk_tv
, &afi
->eof_tv
);
275 ov_clear(&of
); /* keeps the file open */
281 static const char* ogg_suffixes
[] = {"ogg", NULL
};
284 * the init function of the ogg vorbis audio format handler
286 * \param p pointer to the struct to initialize
288 void ogg_init(struct audio_format_handler
*afh
)
290 afh
->get_file_info
= ogg_get_file_info
,
291 afh
->close_audio_file
= ogg_close_audio_file
;
292 afh
->suffixes
= ogg_suffixes
;