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"
33 /** must be big enough to hold header */
34 #define CHUNK_SIZE 32768
35 static double chunk_time
= 0.25;
37 static OggVorbis_File
*oggvorbis_file
;
38 static int header_len
;
40 static ssize_t
*chunk_table
, num_chunks
;
41 static struct audio_format_handler
*af
;
42 static long vi_sampling_rate
, vi_bitrate
, vi_bitrate_nominal
;
44 static int ogg_compute_header_len(FILE *file
)
46 int ret
, len
, in
= fileno(file
);
53 ogg_stream_state
*stream_in
= para_malloc(sizeof(ogg_stream_state
));
54 ogg_stream_state
*stream_out
= para_malloc(sizeof(ogg_stream_state
));
55 ogg_sync_state
*sync_in
= para_malloc(sizeof(ogg_sync_state
));
57 ogg_sync_init(sync_in
);
58 vorbis_info_init(&vi
);
59 vorbis_comment_init(&vc
);
60 buf
= ogg_sync_buffer(sync_in
, CHUNK_SIZE
);
61 len
= read(in
, buf
, CHUNK_SIZE
);
65 ogg_sync_wrote(sync_in
, len
);
66 ret
= -E_SYNC_PAGEOUT
;
67 if (ogg_sync_pageout(sync_in
, &page
) <= 0)
69 serial
= ogg_page_serialno(&page
);
70 ogg_stream_init(stream_in
, serial
);
71 ogg_stream_init(stream_out
, serial
);
72 ret
= ogg_stream_pagein(stream_in
, &page
);
74 ret
= E_STREAM_PAGEIN
;
77 ret
= ogg_stream_packetout(stream_in
, &packet
);
79 ret
= -E_STREAM_PACKETOUT
;
83 if (vorbis_synthesis_headerin(&vi
, &vc
, &packet
) < 0)
85 PARA_INFO_LOG("channels: %i, rate: %li\n", vi
.channels
, vi
.rate
);
86 ogg_stream_packetin(stream_out
, &packet
);
88 ret
= ogg_sync_pageout(sync_in
, &page
);
90 ret
= -E_SYNC_PAGEOUT
;
93 ogg_stream_pagein(stream_in
, &page
);
94 ogg_stream_packetout(stream_in
, &packet
);
95 ogg_stream_packetin(stream_out
, &packet
);
97 ret
= ogg_sync_pageout(sync_in
, &page
);
99 ret
= -E_SYNC_PAGEOUT
;
102 ogg_stream_pagein(stream_in
, &page
);
103 ogg_stream_packetout(stream_in
, &packet
);
104 ogg_stream_packetin(stream_out
, &packet
);
107 while (ogg_stream_flush(stream_out
, &page
))
108 header_len
+= page
.body_len
+ page
.header_len
;
110 PARA_INFO_LOG("header_len = %d\n", header_len
);
112 ogg_stream_destroy(stream_in
);
113 ogg_stream_destroy(stream_out
);
115 ogg_sync_destroy(sync_in
);
116 vorbis_info_clear(&vi
);
117 vorbis_comment_clear(&vc
);
121 static void tunetable(void)
123 int i
= 1, j
= -1, lp
= 1;
124 while (i
< num_chunks
) {
125 if (chunk_table
[i
] == chunk_table
[lp
]) {
130 tv_scale(i
, &af
->chunk_tv
, &af
->eof_tv
);
131 for (j
= lp
; j
< i
; j
++)
132 chunk_table
[j
] = chunk_table
[i
];
136 for (i
= 2; i
< num_chunks
; i
++)
137 if (chunk_table
[i
] != chunk_table
[1])
140 for (i
= 2; i
< num_chunks
- lp
; i
++)
141 chunk_table
[i
] = chunk_table
[i
+ lp
];
147 * Alloc and fill array table of byte offsets. chunk_table[i] is the
148 * offset in the current input file at which the sample containing time i *
151 static void ogg_compute_chunk_table(double time_total
)
154 ssize_t max_chunk_len
, pos
= 0, min
= 0, old_pos
;
158 num
= time_total
/ chunk_time
+ 3;
159 PARA_DEBUG_LOG("chunk time: %g allocating %d chunk pointers\n",
161 chunk_table
= para_malloc(num
* sizeof(size_t));
164 for (i
= 1; ret
== 0; i
++) {
166 ret
= ov_time_seek(oggvorbis_file
, i
* chunk_time
);
169 pos
= ov_raw_tell(oggvorbis_file
);
170 diff
= pos
- old_pos
;
171 max_chunk_len
= PARA_MAX(max_chunk_len
, diff
);
172 min
= (i
== 1)? diff
: PARA_MIN(min
, diff
);
173 chunk_table
[i
] = pos
;
174 if (i
< 11 || !((i
- 1) % 1000)|| i
> num
- 11)
175 PARA_DEBUG_LOG("chunk #%d: %g secs, pos: %zd, "
176 "size: %zd\n", i
- 1,
177 i
* chunk_time
, pos
, pos
- old_pos
);
181 chunk_table
[i
] = pos
;
183 PARA_INFO_LOG("%zu chunks (%fs), max chunk: %zd, min chunk: %zd\n",
184 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
;
203 static int ogg_save_header(FILE *file
, int len
)
207 header
= para_malloc(len
);
209 ret
= read(fileno(file
), header
, len
);
216 * Init oggvorbis file and write some tech data to given pointers.
218 static int ogg_get_file_info(FILE *file
, char *info_str
, long unsigned *frames
,
219 int *seconds
, size_t **vss_chunk_table
)
224 ogg_int64_t raw_total
;
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);
251 vi_bitrate_nominal
= vi
->bitrate_nominal
;
253 ogg_compute_chunk_table(time_total
);
255 *frames
= num_chunks
;
256 *vss_chunk_table
= chunk_table
;
257 sprintf(info_str
, "audio_file_info1:%zu x %lu, %ldkHz, %d channels, %ldkbps\n"
258 "audio_file_info2: \n"
259 "audio_file_info3: \n",
260 num_chunks
, (long unsigned) (chunk_time
* 1000 * 1000),
261 vi_sampling_rate
/ 1000, vi
->channels
, vi_bitrate
/ 1000
266 ogg_close_audio_file();
270 static char *ogg_get_header_info(int *len
)
276 static const char* ogg_suffixes
[] = {"ogg", NULL
};
279 * the init function of the ogg vorbis audio format handler
281 * \param p pointer to the struct to initialize
283 void ogg_init(struct audio_format_handler
*p
)
286 af
->get_file_info
= ogg_get_file_info
,
287 af
->close_audio_file
= ogg_close_audio_file
;
288 af
->get_header_info
= ogg_get_header_info
;
289 af
->chunk_tv
.tv_sec
= 0;
290 af
->chunk_tv
.tv_usec
= 250 * 1000;
291 tv_scale(3, &af
->chunk_tv
, &af
->eof_tv
);
292 af
->suffixes
= ogg_suffixes
;