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"
32 /** must be big enough to hold header */
33 #define CHUNK_SIZE 32768
34 static double chunk_time
= 0.25;
36 static OggVorbis_File
*oggvorbis_file
;
37 static int header_len
;
39 static ssize_t
*chunk_table
;
40 static struct audio_format_handler
*af
;
42 static int ogg_compute_header_len(FILE *file
)
44 int ret
, len
, in
= fileno(file
);
51 ogg_stream_state
*stream_in
= para_malloc(sizeof(ogg_stream_state
));
52 ogg_stream_state
*stream_out
= para_malloc(sizeof(ogg_stream_state
));
53 ogg_sync_state
*sync_in
= para_malloc(sizeof(ogg_sync_state
));
55 ogg_sync_init(sync_in
);
56 vorbis_info_init(&vi
);
57 vorbis_comment_init(&vc
);
58 buf
= ogg_sync_buffer(sync_in
, CHUNK_SIZE
);
59 len
= read(in
, buf
, CHUNK_SIZE
);
63 ogg_sync_wrote(sync_in
, len
);
64 ret
= -E_SYNC_PAGEOUT
;
65 if (ogg_sync_pageout(sync_in
, &page
) <= 0)
67 serial
= ogg_page_serialno(&page
);
68 ogg_stream_init(stream_in
, serial
);
69 ogg_stream_init(stream_out
, serial
);
70 ret
= ogg_stream_pagein(stream_in
, &page
);
72 ret
= E_STREAM_PAGEIN
;
75 ret
= ogg_stream_packetout(stream_in
, &packet
);
77 ret
= -E_STREAM_PACKETOUT
;
81 if (vorbis_synthesis_headerin(&vi
, &vc
, &packet
) < 0)
83 PARA_INFO_LOG("channels: %i, rate: %li\n", vi
.channels
, vi
.rate
);
84 ogg_stream_packetin(stream_out
, &packet
);
86 ret
= ogg_sync_pageout(sync_in
, &page
);
88 ret
= -E_SYNC_PAGEOUT
;
91 ogg_stream_pagein(stream_in
, &page
);
92 ogg_stream_packetout(stream_in
, &packet
);
93 ogg_stream_packetin(stream_out
, &packet
);
95 ret
= ogg_sync_pageout(sync_in
, &page
);
97 ret
= -E_SYNC_PAGEOUT
;
100 ogg_stream_pagein(stream_in
, &page
);
101 ogg_stream_packetout(stream_in
, &packet
);
102 ogg_stream_packetin(stream_out
, &packet
);
105 while (ogg_stream_flush(stream_out
, &page
))
106 header_len
+= page
.body_len
+ page
.header_len
;
108 PARA_INFO_LOG("header_len = %d\n", header_len
);
110 ogg_stream_destroy(stream_in
);
111 ogg_stream_destroy(stream_out
);
113 ogg_sync_destroy(sync_in
);
114 vorbis_info_clear(&vi
);
115 vorbis_comment_clear(&vc
);
119 static void tunetable(long unsigned num_chunks
)
121 int i
= 1, j
= -1, lp
= 1;
122 while (i
< num_chunks
) {
123 if (chunk_table
[i
] == chunk_table
[lp
]) {
128 tv_scale(i
, &af
->chunk_tv
, &af
->eof_tv
);
129 for (j
= lp
; j
< i
; j
++)
130 chunk_table
[j
] = chunk_table
[i
];
134 for (i
= 2; i
< num_chunks
; i
++)
135 if (chunk_table
[i
] != chunk_table
[1])
138 for (i
= 2; i
< num_chunks
- lp
; i
++)
139 chunk_table
[i
] = chunk_table
[i
+ lp
];
145 * Alloc and fill array table of byte offsets. chunk_table[i] is the
146 * offset in the current input file at which the sample containing time i *
149 static long unsigned ogg_compute_chunk_table(double time_total
)
152 ssize_t max_chunk_len
, pos
= 0, min
= 0, old_pos
;
153 long unsigned num_chunks
;
157 num
= time_total
/ chunk_time
+ 3;
158 PARA_DEBUG_LOG("chunk time: %g allocating %d chunk pointers\n",
160 chunk_table
= para_malloc(num
* sizeof(size_t));
163 for (i
= 1; ret
== 0; i
++) {
165 ret
= ov_time_seek(oggvorbis_file
, i
* chunk_time
);
168 pos
= ov_raw_tell(oggvorbis_file
);
169 diff
= pos
- old_pos
;
170 max_chunk_len
= PARA_MAX(max_chunk_len
, diff
);
171 min
= (i
== 1)? diff
: PARA_MIN(min
, diff
);
172 chunk_table
[i
] = pos
;
173 if (i
< 11 || !((i
- 1) % 1000)|| i
> num
- 11)
174 PARA_DEBUG_LOG("chunk #%d: %g secs, pos: %zd, "
175 "size: %zd\n", i
- 1,
176 i
* chunk_time
, pos
, pos
- old_pos
);
180 chunk_table
[i
] = pos
;
181 tunetable(num_chunks
);
182 PARA_INFO_LOG("%lu chunks (%fs), max chunk: %zd, min chunk: %zd\n",
183 num_chunks
, chunk_time
, max_chunk_len
, min
);
187 static void ogg_close_audio_file(void)
189 if (oggvorbis_file
) {
190 PARA_DEBUG_LOG("%s", "ov_clear\n");
191 ov_clear(oggvorbis_file
);
192 free(oggvorbis_file
);
193 oggvorbis_file
= NULL
;
202 static int ogg_save_header(FILE *file
, int len
)
206 header
= para_malloc(len
);
208 ret
= read(fileno(file
), header
, len
);
215 * Init oggvorbis file and write some tech data to given pointers.
217 static int ogg_get_file_info(FILE *file
, char *info_str
, long unsigned *frames
,
218 int *seconds
, size_t **vss_chunk_table
)
223 ogg_int64_t raw_total
;
224 long vi_sampling_rate
, vi_bitrate
;
227 return -E_OGG_NO_FILE
;
228 ret
= ogg_compute_header_len(file
);
231 ret
= ogg_save_header(file
, header_len
);
235 oggvorbis_file
= para_malloc(sizeof(OggVorbis_File
));
236 ret
= ov_open(file
, oggvorbis_file
, NULL
, 0);
238 free(oggvorbis_file
);
243 vi
= ov_info(oggvorbis_file
, 0);
246 time_total
= ov_time_total(oggvorbis_file
, -1);
247 raw_total
= ov_raw_total(oggvorbis_file
, -1);
248 *seconds
= time_total
;
249 vi_sampling_rate
= vi
->rate
;
250 vi_bitrate
= ov_bitrate(oggvorbis_file
, 0);
252 *frames
= ogg_compute_chunk_table(time_total
);
254 *vss_chunk_table
= chunk_table
;
255 sprintf(info_str
, "audio_file_info1:%lu x %lu, %ldkHz, %d channels, %ldkbps\n"
256 "audio_file_info2: \n"
257 "audio_file_info3: \n",
258 *frames
, (long unsigned) (chunk_time
* 1000 * 1000),
259 vi_sampling_rate
/ 1000, vi
->channels
, vi_bitrate
/ 1000
264 ogg_close_audio_file();
268 static char *ogg_get_header_info(int *len
)
274 static const char* ogg_suffixes
[] = {"ogg", NULL
};
277 * the init function of the ogg vorbis audio format handler
279 * \param p pointer to the struct to initialize
281 void ogg_init(struct audio_format_handler
*p
)
284 af
->get_file_info
= ogg_get_file_info
,
285 af
->close_audio_file
= ogg_close_audio_file
;
286 af
->get_header_info
= ogg_get_header_info
;
287 af
->chunk_tv
.tv_sec
= 0;
288 af
->chunk_tv
.tv_usec
= 250 * 1000;
289 tv_scale(3, &af
->chunk_tv
, &af
->eof_tv
);
290 af
->suffixes
= ogg_suffixes
;