Merge ../paraslash.fml/paraslash
[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 FILE *infile;
38 static int header_len, oggbuf_len, vi_channels;
39 static char *header, *oggbuf;
40 static ssize_t *chunk_table, max_chunk_len;
41 static struct audio_format_handler *af;
42 static long vi_sampling_rate, vi_bitrate, vi_bitrate_nominal,
43 num_chunks;
44
45 static int ogg_compute_header_len(void)
46 {
47 int ret, len, in = fileno(infile);
48 unsigned int serial;
49 char *buf;
50 ogg_page page;
51 ogg_packet packet;
52 vorbis_comment vc;
53 vorbis_info vi;
54 ogg_stream_state *stream_in = para_malloc(sizeof(ogg_stream_state));
55 ogg_stream_state *stream_out = para_malloc(sizeof(ogg_stream_state));
56 ogg_sync_state *sync_in = para_malloc(sizeof(ogg_sync_state));
57
58 ogg_sync_init(sync_in);
59 vorbis_info_init(&vi);
60 vorbis_comment_init(&vc);
61 buf = ogg_sync_buffer(sync_in, CHUNK_SIZE);
62 len = read(in, buf, CHUNK_SIZE);
63 ret = -E_OGG_READ;
64 if (len <= 0)
65 goto err1;
66 ogg_sync_wrote(sync_in, len);
67 ret = -E_SYNC_PAGEOUT;
68 if (ogg_sync_pageout(sync_in, &page) <= 0)
69 goto err1;
70 serial = ogg_page_serialno(&page);
71 ogg_stream_init(stream_in, serial);
72 ogg_stream_init(stream_out, serial);
73 ret = ogg_stream_pagein(stream_in, &page);
74 if (ret < 0) {
75 ret = E_STREAM_PAGEIN;
76 goto err2;
77 }
78 ret = ogg_stream_packetout(stream_in, &packet);
79 if (ret != 1) {
80 ret = -E_STREAM_PACKETOUT;
81 goto err2;
82 }
83 ret = -E_VORBIS;
84 if (vorbis_synthesis_headerin(&vi, &vc, &packet) < 0) {
85 goto err2;
86 } else
87 PARA_INFO_LOG("channels: %i, rate: %li\n", vi.channels,
88 vi.rate);
89 ogg_stream_packetin(stream_out, &packet);
90
91 ret = ogg_sync_pageout(sync_in, &page);
92 if (ret <= 0) {
93 ret = -E_SYNC_PAGEOUT;
94 goto err2;
95 }
96 ogg_stream_pagein(stream_in, &page);
97 ogg_stream_packetout(stream_in, &packet);
98 ogg_stream_packetin(stream_out, &packet);
99
100 ret = ogg_sync_pageout(sync_in, &page);
101 if (ret <= 0) {
102 ret = -E_SYNC_PAGEOUT;
103 goto err2;
104 }
105 ogg_stream_pagein(stream_in, &page);
106 ogg_stream_packetout(stream_in, &packet);
107 ogg_stream_packetin(stream_out, &packet);
108
109 header_len = 0;
110 while (ogg_stream_flush(stream_out, &page))
111 header_len += page.body_len + page.header_len;
112 ret = len;
113 PARA_INFO_LOG("header_len = %d\n", header_len);
114 err2:
115 ogg_stream_destroy(stream_in);
116 ogg_stream_destroy(stream_out);
117 err1:
118 ogg_sync_destroy(sync_in);
119 vorbis_info_clear(&vi);
120 vorbis_comment_clear(&vc);
121 return ret;
122 }
123
124 static void tunetable(void)
125 {
126 int i = 1, j = -1, lp = 1;
127 while (i < num_chunks) {
128 if (chunk_table[i] == chunk_table[lp]) {
129 i++;
130 continue;
131 }
132 if (j < 0)
133 tv_scale(i, &af->chunk_tv, &af->eof_tv);
134 for (j = lp; j < i; j++)
135 chunk_table[j] = chunk_table[i];
136 lp = i;
137 }
138 #if 1
139 for (i = 2; i < num_chunks; i++)
140 if (chunk_table[i] != chunk_table[1])
141 break;
142 lp = i;
143 for (i = 2; i < num_chunks - lp; i++)
144 chunk_table[i] = chunk_table[i + lp];
145 #endif
146 }
147
148
149 /*
150 * Alloc and fill array table of byte offsets. chunk_table[i] is the
151 * offset in the current infile at which the sample containing time i *
152 * CHUNK_TIME begins.
153 */
154 static void ogg_compute_chunk_table(double time_total)
155 {
156 int i, ret, num;
157 ssize_t pos = 0, min = 0, old_pos;
158
159 old_pos = 0;
160 ret = 0;
161 num = time_total / chunk_time + 3;
162 PARA_DEBUG_LOG("chunk time: %g allocating %d chunk pointers\n",
163 chunk_time, num);
164 chunk_table = para_malloc(num * sizeof(ogg_int64_t));
165 chunk_table[0] = 0;
166 max_chunk_len = 0;
167 rewind(infile);
168 for (i = 1; ret == 0; i++) {
169 ogg_int64_t diff;
170 ret = ov_time_seek(oggvorbis_file, i * chunk_time);
171 if (ret)
172 break;
173 pos = ov_raw_tell(oggvorbis_file);
174 diff = pos - old_pos;
175 max_chunk_len = PARA_MAX(max_chunk_len, diff);
176 min = (i == 1)? diff : PARA_MIN(min, diff);
177 chunk_table[i] = pos;
178 if (i < 11 || !((i - 1) % 1000)|| i > num - 11)
179 PARA_DEBUG_LOG("chunk #%d: %g secs, pos: %zd, "
180 "size: %zd\n", i - 1,
181 i * chunk_time, pos, pos - old_pos);
182 old_pos = pos;
183 }
184 num_chunks = i - 1;
185 chunk_table[i] = pos;
186 tunetable();
187 PARA_INFO_LOG("%li chunks (%fs), max chunk: %zd, min chunk: %zd\n",
188 num_chunks, chunk_time, max_chunk_len, min);
189 rewind(infile);
190 }
191
192 static void ogg_close_audio_file(void)
193 {
194 if (oggvorbis_file) {
195 PARA_DEBUG_LOG("%s", "ov_clear\n");
196 ov_clear(oggvorbis_file);
197 free(oggvorbis_file);
198 oggvorbis_file = NULL;
199 }
200 free(header);
201 header = NULL;
202 header_len = 0;
203 free(chunk_table);
204 chunk_table = NULL;
205 num_chunks = 0;
206 free(oggbuf);
207 oggbuf = NULL;
208 oggbuf_len = 0;
209 }
210
211 static int ogg_save_header(FILE *file, int len)
212 {
213 int ret;
214
215 header = para_malloc(len);
216 rewind(file);
217 ret = read(fileno(file), header, len);
218 if (ret != len)
219 return -E_OGG_READ;
220 return 1;
221 }
222
223 /*
224 * Init oggvorbis file and write some tech data to given pointers.
225 */
226 static int ogg_get_file_info(FILE *file, char *info_str, long unsigned *frames,
227 int *seconds)
228 {
229 int ret;
230 double time_total;
231 vorbis_info *vi;
232 ogg_int64_t raw_total;
233
234 infile = file;
235 if (!file)
236 return -E_OGG_NO_FILE;
237 ret = ogg_compute_header_len();
238 if (ret < 0)
239 return ret;
240 ret = ogg_save_header(file, header_len);
241 if (ret < 0)
242 return ret;
243 rewind(file);
244 oggvorbis_file = para_malloc(sizeof(OggVorbis_File));
245 ret = ov_open(file, oggvorbis_file, NULL, 0);
246 if (ret < 0) {
247 free(oggvorbis_file);
248 free(header);
249 return -E_OGG_OPEN;
250 }
251 ret = -E_OGG_INFO;
252 vi = ov_info(oggvorbis_file, 0);
253 if (!vi)
254 goto err;
255 time_total = ov_time_total(oggvorbis_file, -1);
256 raw_total = ov_raw_total(oggvorbis_file, -1);
257 *seconds = time_total;
258 vi_sampling_rate = vi->rate;
259 vi_bitrate = ov_bitrate(oggvorbis_file, 0);
260 vi_bitrate_nominal = vi->bitrate_nominal;
261 vi_channels = vi->channels;
262 ogg_compute_chunk_table(time_total);
263 *frames = num_chunks;
264 sprintf(info_str, "audio_file_info1:%lu x %lu, %ldkHz, %d channels, %ldkbps\n"
265 "audio_file_info2: \n"
266 "audio_file_info3: \n",
267 num_chunks, (long unsigned) (chunk_time * 1000 * 1000),
268 vi_sampling_rate / 1000, vi_channels, vi_bitrate / 1000
269 );
270 rewind(file);
271 return 1;
272 err:
273 ogg_close_audio_file();
274 return ret;
275 }
276
277 /*
278 * Simple stream reposition routine
279 */
280 static int ogg_reposition_stream(long unsigned request)
281 {
282 int ret;
283 long seek;
284
285 seek = chunk_table[request];
286 ret = fseek(infile, seek, SEEK_SET);
287 PARA_DEBUG_LOG("seek to %li returned %d. offset:%li\n", seek,
288 ret, ftell(infile));
289 return ret < 0? -E_OGG_REPOS : 1;
290 }
291
292 static ogg_int64_t get_chunk_size(long unsigned chunk_num)
293 {
294 ogg_int64_t ret;
295 if (chunk_num >= num_chunks)
296 return -1;
297 ret = chunk_table[chunk_num + 1] - chunk_table[chunk_num];
298 if (!ret)
299 return ret;
300 #if 0
301 PARA_DEBUG_LOG("chunk %d: %lli-%lli (%lli bytes)\n",
302 chunk_num,
303 chunk_table[chunk_num],
304 chunk_table[chunk_num + 1] - 1,
305 ret);
306 #endif
307 return ret;
308 }
309
310 char *ogg_read_chunk(long unsigned current_chunk, ssize_t *len)
311 {
312 int ret;
313 ogg_int64_t cs = get_chunk_size(current_chunk);
314 if (!cs) { /* nothing to send for this run */
315 *len = 0;
316 return oggbuf;
317 }
318 if (cs < 0) { /* eof */
319 *len = 0;
320 return NULL;
321 }
322 *len = cs;
323 if (!oggbuf || oggbuf_len < *len) {
324 PARA_INFO_LOG("increasing ogg buffer size (%d -> %zu)\n",
325 oggbuf_len, *len);
326 oggbuf = para_realloc(oggbuf, *len);
327 oggbuf_len = *len;
328 }
329 ret = read(fileno(infile), oggbuf, *len);
330 if (!ret) {
331 *len = 0;
332 return NULL;
333 }
334 if (ret < 0) {
335 *len = -E_OGG_READ;
336 return NULL;
337 }
338 if (ret != *len)
339 PARA_WARNING_LOG("short read (%d/%zd)\n", ret, *len);
340 *len = ret;
341 return oggbuf;
342 }
343
344 static char *ogg_get_header_info(int *len)
345 {
346 *len = header_len;
347 return header;
348 }
349
350 static const char* ogg_suffixes[] = {"ogg", NULL};
351 void ogg_init(struct audio_format_handler *p)
352 {
353 af = p;
354 af->reposition_stream = ogg_reposition_stream;
355 af->get_file_info = ogg_get_file_info,
356 af->read_chunk = ogg_read_chunk;
357 af->close_audio_file = ogg_close_audio_file;
358 af->get_header_info = ogg_get_header_info;
359 af->chunk_tv.tv_sec = 0;
360 af->chunk_tv.tv_usec = 250 * 1000;
361 tv_scale(3, &af->chunk_tv, &af->eof_tv);
362 af->suffixes = ogg_suffixes;
363 }