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;
37 static int header_len;
39 static ssize_t *chunk_table;
40 static struct audio_format_handler *af;
42 static size_t cb_read(void *buf, size_t size, size_t nmemb, void *datasource)
45 return fread(buf, size, nmemb, f);
48 static int cb_seek(__a_unused void *datasource, ogg_int64_t offset,
52 return fseek(f, offset, whence);
55 /* don't do anything as vss still needs the open filehandle */
56 static int cb_close(__a_unused void *datasource)
61 long cb_tell(void *datasource)
67 int ogg_open_callbacks(void *datasource, OggVorbis_File *vf, ov_callbacks c)
69 int ret = ov_open_callbacks(datasource, vf,
70 NULL, /* no initial buffer */
71 0, /* no initial bytes */
72 c); /* the ov_open_callbacks */
74 /* FIXME: provide better error codes */
77 if (ret == OV_ENOTVORBIS)
79 if (ret == OV_EVERSION)
81 if (ret == OV_EBADHEADER)
89 static int ogg_compute_header_len(FILE *file)
91 int ret, len, in = fileno(file);
98 ogg_stream_state *stream_in = para_malloc(sizeof(ogg_stream_state));
99 ogg_stream_state *stream_out = para_malloc(sizeof(ogg_stream_state));
100 ogg_sync_state *sync_in = para_malloc(sizeof(ogg_sync_state));
102 ogg_sync_init(sync_in);
103 vorbis_info_init(&vi);
104 vorbis_comment_init(&vc);
105 buf = ogg_sync_buffer(sync_in, CHUNK_SIZE);
106 len = read(in, buf, CHUNK_SIZE);
110 ogg_sync_wrote(sync_in, len);
111 ret = -E_SYNC_PAGEOUT;
112 if (ogg_sync_pageout(sync_in, &page) <= 0)
114 serial = ogg_page_serialno(&page);
115 ogg_stream_init(stream_in, serial);
116 ogg_stream_init(stream_out, serial);
117 ret = ogg_stream_pagein(stream_in, &page);
119 ret = E_STREAM_PAGEIN;
122 ret = ogg_stream_packetout(stream_in, &packet);
124 ret = -E_STREAM_PACKETOUT;
128 if (vorbis_synthesis_headerin(&vi, &vc, &packet) < 0)
130 PARA_INFO_LOG("channels: %i, rate: %li\n", vi.channels, vi.rate);
131 ogg_stream_packetin(stream_out, &packet);
133 ret = ogg_sync_pageout(sync_in, &page);
135 ret = -E_SYNC_PAGEOUT;
138 ogg_stream_pagein(stream_in, &page);
139 ogg_stream_packetout(stream_in, &packet);
140 ogg_stream_packetin(stream_out, &packet);
142 ret = ogg_sync_pageout(sync_in, &page);
144 ret = -E_SYNC_PAGEOUT;
147 ogg_stream_pagein(stream_in, &page);
148 ogg_stream_packetout(stream_in, &packet);
149 ogg_stream_packetin(stream_out, &packet);
152 while (ogg_stream_flush(stream_out, &page))
153 header_len += page.body_len + page.header_len;
155 PARA_INFO_LOG("header_len = %d\n", header_len);
157 ogg_stream_destroy(stream_in);
158 ogg_stream_destroy(stream_out);
160 ogg_sync_destroy(sync_in);
161 vorbis_info_clear(&vi);
162 vorbis_comment_clear(&vc);
166 static void tunetable(long unsigned num_chunks)
168 int i = 1, j = -1, lp = 1;
169 while (i < num_chunks) {
170 if (chunk_table[i] == chunk_table[lp]) {
175 tv_scale(i, &af->chunk_tv, &af->eof_tv);
176 for (j = lp; j < i; j++)
177 chunk_table[j] = chunk_table[i];
181 for (i = 2; i < num_chunks; i++)
182 if (chunk_table[i] != chunk_table[1])
185 for (i = 2; i < num_chunks - lp; i++)
186 chunk_table[i] = chunk_table[i + lp];
192 * Alloc and fill array table of byte offsets. chunk_table[i] is the
193 * offset in the current input file at which the sample containing time i *
194 * CHUNK_TIME begins. Always successful.
196 static long unsigned ogg_compute_chunk_table(OggVorbis_File *of,
200 ssize_t max_chunk_len, pos = 0, min = 0, old_pos;
201 long unsigned num_chunks;
205 num = time_total / chunk_time + 3;
206 PARA_DEBUG_LOG("chunk time: %g allocating %d chunk pointers\n",
208 chunk_table = para_malloc(num * sizeof(size_t));
211 for (i = 1; ret == 0; i++) {
213 ret = ov_time_seek(of, i * chunk_time);
216 pos = ov_raw_tell(of);
217 diff = pos - old_pos;
218 max_chunk_len = PARA_MAX(max_chunk_len, diff);
219 min = (i == 1)? diff : PARA_MIN(min, diff);
220 chunk_table[i] = pos;
221 if (i < 11 || !((i - 1) % 1000)|| i > num - 11)
222 PARA_DEBUG_LOG("chunk #%d: %g secs, pos: %zd, "
223 "size: %zd\n", i - 1,
224 i * chunk_time, pos, pos - old_pos);
228 chunk_table[i] = pos;
229 // tunetable(num_chunks);
230 PARA_INFO_LOG("%lu chunks (%fs), max chunk: %zd, min chunk: %zd\n",
231 num_chunks, chunk_time, max_chunk_len, min);
235 static void ogg_close_audio_file(void)
242 static int ogg_save_header(FILE *file, int len)
246 header = para_malloc(len);
248 ret = read(fileno(file), header, len);
256 * Init oggvorbis file and write some tech data to given pointers.
258 static int ogg_get_file_info(FILE *file, char *info_str, long unsigned *frames,
259 int *seconds, size_t **vss_chunk_table)
264 ogg_int64_t raw_total;
265 long vi_sampling_rate, vi_bitrate;
267 static const ov_callbacks ovc = {
268 .read_func = cb_read,
269 .seek_func = cb_seek,
270 .close_func = cb_close,
275 return -E_OGG_NO_FILE;
276 ret = ogg_compute_header_len(file);
279 ret = ogg_save_header(file, header_len);
283 ret = ogg_open_callbacks(file, &of, ovc);
287 vi = ov_info(&of, 0);
290 time_total = ov_time_total(&of, -1);
291 raw_total = ov_raw_total(&of, -1);
292 *seconds = time_total;
293 vi_sampling_rate = vi->rate;
294 vi_bitrate = ov_bitrate(&of, 0);
296 *frames = ogg_compute_chunk_table(&of, time_total);
298 *vss_chunk_table = chunk_table;
299 sprintf(info_str, "audio_file_info1:%lu x %lu, %ldkHz, %d channels, %ldkbps\n"
300 "audio_file_info2: \n"
301 "audio_file_info3: \n",
302 *frames, (long unsigned) (chunk_time * 1000 * 1000),
303 vi_sampling_rate / 1000, vi->channels, vi_bitrate / 1000
309 ov_clear(&of); /* keeps the file open */
315 static char *ogg_get_header_info(int *len)
321 static const char* ogg_suffixes[] = {"ogg", NULL};
324 * the init function of the ogg vorbis audio format handler
326 * \param p pointer to the struct to initialize
328 void ogg_init(struct audio_format_handler *p)
331 af->get_file_info = ogg_get_file_info,
332 af->close_audio_file = ogg_close_audio_file;
333 af->get_header_info = ogg_get_header_info;
334 af->chunk_tv.tv_sec = 0;
335 af->chunk_tv.tv_usec = 250 * 1000;
336 tv_scale(3, &af->chunk_tv, &af->eof_tv);
337 af->suffixes = ogg_suffixes;