ogg_afh.c: Kill global variable infile
[paraslash.git] / ogg_afh.c
1 /*
2 * Copyright (C) 2004-2007 Andre Noll <maan@systemlinux.org>
3 *
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.
8 *
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.
13 *
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.
17 */
18 /** \file ogg_afh.c para_server's ogg vorbis audio format handler */
19
20 #include <inttypes.h>
21 #include <ogg/ogg.h>
22 #include <vorbis/codec.h>
23 #include <vorbis/vorbisfile.h>
24
25 #include "server.cmdline.h"
26 #include "server.h"
27 #include "vss.h"
28 #include "afh.h"
29 #include "error.h"
30 #include "string.h"
31 #include "fd.h"
32
33 /** must be big enough to hold header */
34 #define CHUNK_SIZE 32768
35 static double chunk_time = 0.25;
36
37 static OggVorbis_File *oggvorbis_file;
38 static int header_len;
39 static char *header;
40 static ssize_t *chunk_table, max_chunk_len, num_chunks;
41 static struct audio_format_handler *af;
42 static long vi_sampling_rate, vi_bitrate, vi_bitrate_nominal;
43
44 static int ogg_compute_header_len(FILE *file)
45 {
46 int ret, len, in = fileno(file);
47 unsigned int serial;
48 char *buf;
49 ogg_page page;
50 ogg_packet packet;
51 vorbis_comment vc;
52 vorbis_info vi;
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));
56
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);
62 ret = -E_OGG_READ;
63 if (len <= 0)
64 goto err1;
65 ogg_sync_wrote(sync_in, len);
66 ret = -E_SYNC_PAGEOUT;
67 if (ogg_sync_pageout(sync_in, &page) <= 0)
68 goto err1;
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);
73 if (ret < 0) {
74 ret = E_STREAM_PAGEIN;
75 goto err2;
76 }
77 ret = ogg_stream_packetout(stream_in, &packet);
78 if (ret != 1) {
79 ret = -E_STREAM_PACKETOUT;
80 goto err2;
81 }
82 ret = -E_VORBIS;
83 if (vorbis_synthesis_headerin(&vi, &vc, &packet) < 0)
84 goto err2;
85 PARA_INFO_LOG("channels: %i, rate: %li\n", vi.channels, vi.rate);
86 ogg_stream_packetin(stream_out, &packet);
87
88 ret = ogg_sync_pageout(sync_in, &page);
89 if (ret <= 0) {
90 ret = -E_SYNC_PAGEOUT;
91 goto err2;
92 }
93 ogg_stream_pagein(stream_in, &page);
94 ogg_stream_packetout(stream_in, &packet);
95 ogg_stream_packetin(stream_out, &packet);
96
97 ret = ogg_sync_pageout(sync_in, &page);
98 if (ret <= 0) {
99 ret = -E_SYNC_PAGEOUT;
100 goto err2;
101 }
102 ogg_stream_pagein(stream_in, &page);
103 ogg_stream_packetout(stream_in, &packet);
104 ogg_stream_packetin(stream_out, &packet);
105
106 header_len = 0;
107 while (ogg_stream_flush(stream_out, &page))
108 header_len += page.body_len + page.header_len;
109 ret = len;
110 PARA_INFO_LOG("header_len = %d\n", header_len);
111 err2:
112 ogg_stream_destroy(stream_in);
113 ogg_stream_destroy(stream_out);
114 err1:
115 ogg_sync_destroy(sync_in);
116 vorbis_info_clear(&vi);
117 vorbis_comment_clear(&vc);
118 return ret;
119 }
120
121 static void tunetable(void)
122 {
123 int i = 1, j = -1, lp = 1;
124 while (i < num_chunks) {
125 if (chunk_table[i] == chunk_table[lp]) {
126 i++;
127 continue;
128 }
129 if (j < 0)
130 tv_scale(i, &af->chunk_tv, &af->eof_tv);
131 for (j = lp; j < i; j++)
132 chunk_table[j] = chunk_table[i];
133 lp = i;
134 }
135 #if 1
136 for (i = 2; i < num_chunks; i++)
137 if (chunk_table[i] != chunk_table[1])
138 break;
139 lp = i;
140 for (i = 2; i < num_chunks - lp; i++)
141 chunk_table[i] = chunk_table[i + lp];
142 #endif
143 }
144
145
146 /*
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 *
149 * CHUNK_TIME begins.
150 */
151 static void ogg_compute_chunk_table(FILE *file, double time_total)
152 {
153 int i, ret, num;
154 ssize_t pos = 0, min = 0, old_pos;
155
156 old_pos = 0;
157 ret = 0;
158 num = time_total / chunk_time + 3;
159 PARA_DEBUG_LOG("chunk time: %g allocating %d chunk pointers\n",
160 chunk_time, num);
161 chunk_table = para_malloc(num * sizeof(size_t));
162 chunk_table[0] = 0;
163 max_chunk_len = 0;
164 rewind(file);
165 for (i = 1; ret == 0; i++) {
166 ogg_int64_t diff;
167 ret = ov_time_seek(oggvorbis_file, i * chunk_time);
168 if (ret)
169 break;
170 pos = ov_raw_tell(oggvorbis_file);
171 diff = pos - old_pos;
172 max_chunk_len = PARA_MAX(max_chunk_len, diff);
173 min = (i == 1)? diff : PARA_MIN(min, diff);
174 chunk_table[i] = pos;
175 if (i < 11 || !((i - 1) % 1000)|| i > num - 11)
176 PARA_DEBUG_LOG("chunk #%d: %g secs, pos: %zd, "
177 "size: %zd\n", i - 1,
178 i * chunk_time, pos, pos - old_pos);
179 old_pos = pos;
180 }
181 num_chunks = i - 1;
182 chunk_table[i] = pos;
183 tunetable();
184 PARA_INFO_LOG("%zu chunks (%fs), max chunk: %zd, min chunk: %zd\n",
185 num_chunks, chunk_time, max_chunk_len, min);
186 rewind(file);
187 }
188
189 static void ogg_close_audio_file(void)
190 {
191 if (oggvorbis_file) {
192 PARA_DEBUG_LOG("%s", "ov_clear\n");
193 ov_clear(oggvorbis_file);
194 free(oggvorbis_file);
195 oggvorbis_file = NULL;
196 }
197 free(header);
198 header = NULL;
199 header_len = 0;
200 free(chunk_table);
201 chunk_table = NULL;
202 num_chunks = 0;
203 }
204
205 static int ogg_save_header(FILE *file, int len)
206 {
207 int ret;
208
209 header = para_malloc(len);
210 rewind(file);
211 ret = read(fileno(file), header, len);
212 if (ret != len)
213 return -E_OGG_READ;
214 return 1;
215 }
216
217 /*
218 * Init oggvorbis file and write some tech data to given pointers.
219 */
220 static int ogg_get_file_info(FILE *file, char *info_str, long unsigned *frames,
221 int *seconds, size_t **vss_chunk_table)
222 {
223 int ret;
224 double time_total;
225 vorbis_info *vi;
226 ogg_int64_t raw_total;
227
228 if (!file)
229 return -E_OGG_NO_FILE;
230 ret = ogg_compute_header_len(file);
231 if (ret < 0)
232 return ret;
233 ret = ogg_save_header(file, header_len);
234 if (ret < 0)
235 return ret;
236 rewind(file);
237 oggvorbis_file = para_malloc(sizeof(OggVorbis_File));
238 ret = ov_open(file, oggvorbis_file, NULL, 0);
239 if (ret < 0) {
240 free(oggvorbis_file);
241 free(header);
242 return -E_OGG_OPEN;
243 }
244 ret = -E_OGG_INFO;
245 vi = ov_info(oggvorbis_file, 0);
246 if (!vi)
247 goto err;
248 time_total = ov_time_total(oggvorbis_file, -1);
249 raw_total = ov_raw_total(oggvorbis_file, -1);
250 *seconds = time_total;
251 vi_sampling_rate = vi->rate;
252 vi_bitrate = ov_bitrate(oggvorbis_file, 0);
253 vi_bitrate_nominal = vi->bitrate_nominal;
254 ogg_compute_chunk_table(file, 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
262 );
263 rewind(file);
264 return 1;
265 err:
266 ogg_close_audio_file();
267 return ret;
268 }
269
270 static char *ogg_get_header_info(int *len)
271 {
272 *len = header_len;
273 return header;
274 }
275
276 static const char* ogg_suffixes[] = {"ogg", NULL};
277
278 /**
279 * the init function of the ogg vorbis audio format handler
280 *
281 * \param p pointer to the struct to initialize
282 */
283 void ogg_init(struct audio_format_handler *p)
284 {
285 af = 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;
293 }