ogg_afh.c: Kill unneccessary inclusion of fd.h
[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
32 /** must be big enough to hold header */
33 #define CHUNK_SIZE 32768
34 static double chunk_time = 0.25;
35
36 static OggVorbis_File *oggvorbis_file;
37 static int header_len;
38 static char *header;
39 static ssize_t *chunk_table;
40 static struct audio_format_handler *af;
41
42 static int ogg_compute_header_len(FILE *file)
43 {
44 int ret, len, in = fileno(file);
45 unsigned int serial;
46 char *buf;
47 ogg_page page;
48 ogg_packet packet;
49 vorbis_comment vc;
50 vorbis_info vi;
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));
54
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);
60 ret = -E_OGG_READ;
61 if (len <= 0)
62 goto err1;
63 ogg_sync_wrote(sync_in, len);
64 ret = -E_SYNC_PAGEOUT;
65 if (ogg_sync_pageout(sync_in, &page) <= 0)
66 goto err1;
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);
71 if (ret < 0) {
72 ret = E_STREAM_PAGEIN;
73 goto err2;
74 }
75 ret = ogg_stream_packetout(stream_in, &packet);
76 if (ret != 1) {
77 ret = -E_STREAM_PACKETOUT;
78 goto err2;
79 }
80 ret = -E_VORBIS;
81 if (vorbis_synthesis_headerin(&vi, &vc, &packet) < 0)
82 goto err2;
83 PARA_INFO_LOG("channels: %i, rate: %li\n", vi.channels, vi.rate);
84 ogg_stream_packetin(stream_out, &packet);
85
86 ret = ogg_sync_pageout(sync_in, &page);
87 if (ret <= 0) {
88 ret = -E_SYNC_PAGEOUT;
89 goto err2;
90 }
91 ogg_stream_pagein(stream_in, &page);
92 ogg_stream_packetout(stream_in, &packet);
93 ogg_stream_packetin(stream_out, &packet);
94
95 ret = ogg_sync_pageout(sync_in, &page);
96 if (ret <= 0) {
97 ret = -E_SYNC_PAGEOUT;
98 goto err2;
99 }
100 ogg_stream_pagein(stream_in, &page);
101 ogg_stream_packetout(stream_in, &packet);
102 ogg_stream_packetin(stream_out, &packet);
103
104 header_len = 0;
105 while (ogg_stream_flush(stream_out, &page))
106 header_len += page.body_len + page.header_len;
107 ret = len;
108 PARA_INFO_LOG("header_len = %d\n", header_len);
109 err2:
110 ogg_stream_destroy(stream_in);
111 ogg_stream_destroy(stream_out);
112 err1:
113 ogg_sync_destroy(sync_in);
114 vorbis_info_clear(&vi);
115 vorbis_comment_clear(&vc);
116 return ret;
117 }
118
119 static void tunetable(long unsigned num_chunks)
120 {
121 int i = 1, j = -1, lp = 1;
122 while (i < num_chunks) {
123 if (chunk_table[i] == chunk_table[lp]) {
124 i++;
125 continue;
126 }
127 if (j < 0)
128 tv_scale(i, &af->chunk_tv, &af->eof_tv);
129 for (j = lp; j < i; j++)
130 chunk_table[j] = chunk_table[i];
131 lp = i;
132 }
133 #if 1
134 for (i = 2; i < num_chunks; i++)
135 if (chunk_table[i] != chunk_table[1])
136 break;
137 lp = i;
138 for (i = 2; i < num_chunks - lp; i++)
139 chunk_table[i] = chunk_table[i + lp];
140 #endif
141 }
142
143
144 /*
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 *
147 * CHUNK_TIME begins.
148 */
149 static long unsigned ogg_compute_chunk_table(double time_total)
150 {
151 int i, ret, num;
152 ssize_t max_chunk_len, pos = 0, min = 0, old_pos;
153 long unsigned num_chunks;
154
155 old_pos = 0;
156 ret = 0;
157 num = time_total / chunk_time + 3;
158 PARA_DEBUG_LOG("chunk time: %g allocating %d chunk pointers\n",
159 chunk_time, num);
160 chunk_table = para_malloc(num * sizeof(size_t));
161 chunk_table[0] = 0;
162 max_chunk_len = 0;
163 for (i = 1; ret == 0; i++) {
164 ogg_int64_t diff;
165 ret = ov_time_seek(oggvorbis_file, i * chunk_time);
166 if (ret)
167 break;
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);
177 old_pos = pos;
178 }
179 num_chunks = i - 1;
180 chunk_table[i] = pos;
181 tunetable(num_chunks);
182 PARA_INFO_LOG("%zu chunks (%fs), max chunk: %zd, min chunk: %zd\n",
183 num_chunks, chunk_time, max_chunk_len, min);
184 return num_chunks;
185 }
186
187 static void ogg_close_audio_file(void)
188 {
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;
194 }
195 free(header);
196 header = NULL;
197 header_len = 0;
198 free(chunk_table);
199 chunk_table = NULL;
200 }
201
202 static int ogg_save_header(FILE *file, int len)
203 {
204 int ret;
205
206 header = para_malloc(len);
207 rewind(file);
208 ret = read(fileno(file), header, len);
209 if (ret != len)
210 return -E_OGG_READ;
211 return 1;
212 }
213
214 /*
215 * Init oggvorbis file and write some tech data to given pointers.
216 */
217 static int ogg_get_file_info(FILE *file, char *info_str, long unsigned *frames,
218 int *seconds, size_t **vss_chunk_table)
219 {
220 int ret;
221 double time_total;
222 vorbis_info *vi;
223 ogg_int64_t raw_total;
224 long vi_sampling_rate, vi_bitrate;
225
226 if (!file)
227 return -E_OGG_NO_FILE;
228 ret = ogg_compute_header_len(file);
229 if (ret < 0)
230 return ret;
231 ret = ogg_save_header(file, header_len);
232 if (ret < 0)
233 return ret;
234 rewind(file);
235 oggvorbis_file = para_malloc(sizeof(OggVorbis_File));
236 ret = ov_open(file, oggvorbis_file, NULL, 0);
237 if (ret < 0) {
238 free(oggvorbis_file);
239 free(header);
240 return -E_OGG_OPEN;
241 }
242 ret = -E_OGG_INFO;
243 vi = ov_info(oggvorbis_file, 0);
244 if (!vi)
245 goto err;
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 rewind(file);
252 *frames = ogg_compute_chunk_table(time_total);
253 rewind(file);
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
260 );
261 rewind(file);
262 return 1;
263 err:
264 ogg_close_audio_file();
265 return ret;
266 }
267
268 static char *ogg_get_header_info(int *len)
269 {
270 *len = header_len;
271 return header;
272 }
273
274 static const char* ogg_suffixes[] = {"ogg", NULL};
275
276 /**
277 * the init function of the ogg vorbis audio format handler
278 *
279 * \param p pointer to the struct to initialize
280 */
281 void ogg_init(struct audio_format_handler *p)
282 {
283 af = 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;
291 }