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;
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,
45 static int ogg_compute_header_len(void)
47 int ret, len, in = fileno(infile);
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));
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);
66 ogg_sync_wrote(sync_in, len);
67 ret = -E_SYNC_PAGEOUT;
68 if (ogg_sync_pageout(sync_in, &page) <= 0)
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);
75 ret = E_STREAM_PAGEIN;
78 ret = ogg_stream_packetout(stream_in, &packet);
80 ret = -E_STREAM_PACKETOUT;
84 if (vorbis_synthesis_headerin(&vi, &vc, &packet) < 0) {
87 PARA_INFO_LOG("channels: %i, rate: %li\n", vi.channels,
89 ogg_stream_packetin(stream_out, &packet);
91 ret = ogg_sync_pageout(sync_in, &page);
93 ret = -E_SYNC_PAGEOUT;
96 ogg_stream_pagein(stream_in, &page);
97 ogg_stream_packetout(stream_in, &packet);
98 ogg_stream_packetin(stream_out, &packet);
100 ret = ogg_sync_pageout(sync_in, &page);
102 ret = -E_SYNC_PAGEOUT;
105 ogg_stream_pagein(stream_in, &page);
106 ogg_stream_packetout(stream_in, &packet);
107 ogg_stream_packetin(stream_out, &packet);
110 while (ogg_stream_flush(stream_out, &page))
111 header_len += page.body_len + page.header_len;
113 PARA_INFO_LOG("header_len = %d\n", header_len);
115 ogg_stream_destroy(stream_in);
116 ogg_stream_destroy(stream_out);
118 ogg_sync_destroy(sync_in);
119 vorbis_info_clear(&vi);
120 vorbis_comment_clear(&vc);
124 static void tunetable(void)
126 int i = 1, j = -1, lp = 1;
127 while (i < num_chunks) {
128 if (chunk_table[i] == chunk_table[lp]) {
133 tv_scale(i, &af->chunk_tv, &af->eof_tv);
134 for (j = lp; j < i; j++)
135 chunk_table[j] = chunk_table[i];
139 for (i = 2; i < num_chunks; i++)
140 if (chunk_table[i] != chunk_table[1])
143 for (i = 2; i < num_chunks - lp; i++)
144 chunk_table[i] = chunk_table[i + lp];
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 *
154 static void ogg_compute_chunk_table(double time_total)
157 ssize_t pos = 0, min = 0, old_pos;
161 num = time_total / chunk_time + 3;
162 PARA_DEBUG_LOG("chunk time: %g allocating %d chunk pointers\n",
164 chunk_table = para_malloc(num * sizeof(ogg_int64_t));
168 for (i = 1; ret == 0; i++) {
170 ret = ov_time_seek(oggvorbis_file, i * chunk_time);
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);
185 chunk_table[i] = pos;
187 PARA_INFO_LOG("%li chunks (%fs), max chunk: %zd, min chunk: %zd\n",
188 num_chunks, chunk_time, max_chunk_len, min);
192 static void ogg_close_audio_file(void)
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;
211 static int ogg_save_header(FILE *file, int len)
215 header = para_malloc(len);
217 ret = read(fileno(file), header, len);
224 * Init oggvorbis file and write some tech data to given pointers.
226 static int ogg_get_file_info(FILE *file, char *info_str, long unsigned *frames,
232 ogg_int64_t raw_total;
236 return -E_OGG_NO_FILE;
237 ret = ogg_compute_header_len();
240 ret = ogg_save_header(file, header_len);
244 oggvorbis_file = para_malloc(sizeof(OggVorbis_File));
245 ret = ov_open(file, oggvorbis_file, NULL, 0);
247 free(oggvorbis_file);
252 vi = ov_info(oggvorbis_file, 0);
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
273 ogg_close_audio_file();
278 * Simple stream reposition routine
280 static int ogg_reposition_stream(long unsigned request)
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,
289 return ret < 0? -E_OGG_REPOS : 1;
292 static ogg_int64_t get_chunk_size(long unsigned chunk_num)
295 if (chunk_num >= num_chunks)
297 ret = chunk_table[chunk_num + 1] - chunk_table[chunk_num];
301 PARA_DEBUG_LOG("chunk %d: %lli-%lli (%lli bytes)\n",
303 chunk_table[chunk_num],
304 chunk_table[chunk_num + 1] - 1,
310 char *ogg_read_chunk(long unsigned current_chunk, ssize_t *len)
313 ogg_int64_t cs = get_chunk_size(current_chunk);
314 if (!cs) { /* nothing to send for this run */
318 if (cs < 0) { /* eof */
323 if (!oggbuf || oggbuf_len < *len) {
324 PARA_INFO_LOG("increasing ogg buffer size (%d -> %zu)\n",
326 oggbuf = para_realloc(oggbuf, *len);
329 ret = read(fileno(infile), oggbuf, *len);
339 PARA_WARNING_LOG("short read (%d/%zd)\n", ret, *len);
344 static char *ogg_get_header_info(int *len)
350 static const char* ogg_suffixes[] = {"ogg", NULL};
351 void ogg_init(struct audio_format_handler *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;