2 * Copyright (C) 2004-2009 Andre Noll <maan@systemlinux.org>
4 * Licensed under the GPL v2. For licencing details see COPYING.
7 /** \file ogg_afh.c Audio format handler for ogg vorbis files. */
11 #include <vorbis/codec.h>
18 /* Taken from decoder_example.c of libvorbis-1.2.3. */
19 static int read_vorbis_comment(ogg_sync_state
*oss
, ogg_stream_state
*stream
,
20 vorbis_info
*vi
, vorbis_comment
*vc
)
28 int ret
= ogg_sync_pageout(oss
, &page
);
30 break; /* Need more data */
34 * We can ignore any errors here as they'll also become
35 * apparent at packetout.
37 ogg_stream_pagein(stream
, &page
);
39 ret
= ogg_stream_packetout(stream
, &packet
);
43 return -E_STREAM_PACKETOUT
;
44 ret
= vorbis_synthesis_headerin(vi
, vc
,
55 static int read_vorbis_info(ogg_sync_state
*oss
, struct afh_info
*afhi
)
60 ogg_stream_state stream
;
65 vorbis_info_init(&vi
);
66 vorbis_comment_init(&vc
);
68 ret
= -E_SYNC_PAGEOUT
;
69 if (ogg_sync_pageout(oss
, &page
) != 1)
72 ret
= ogg_page_serialno(&page
);
73 ogg_stream_init(&stream
, ret
);
75 ret
= -E_STREAM_PAGEIN
;
76 if (ogg_stream_pagein(&stream
, &page
) < 0)
79 ret
= -E_STREAM_PACKETOUT
;
80 if (ogg_stream_packetout(&stream
, &packet
) != 1)
84 if (vorbis_synthesis_headerin(&vi
, &vc
, &packet
) < 0)
88 afhi
->channels
= vi
.channels
;
89 afhi
->frequency
= vi
.rate
;
90 afhi
->bitrate
= vi
.bitrate_nominal
/ 1000;
91 PARA_DEBUG_LOG("channels: %i, sampling rate: %i, bitrate: %i\n",
92 afhi
->channels
, afhi
->frequency
, afhi
->bitrate
);
93 ret
= read_vorbis_comment(oss
, &stream
, &vi
, &vc
);
96 taginfo
= make_taginfo(
97 vorbis_comment_query(&vc
, "title", 0),
98 vorbis_comment_query(&vc
, "artist", 0),
99 vorbis_comment_query(&vc
, "album", 0),
100 vorbis_comment_query(&vc
, "year", 0),
101 vorbis_comment_query(&vc
, "comment", 0)
103 PARA_DEBUG_LOG("tag info: %s\n", taginfo
);
104 afhi
->info_string
= make_message("%s:\n%s",
105 status_item_list
[SI_AUDIO_FILE_INFO
], taginfo
);
108 afhi
->header_offset
= 0;
109 afhi
->header_len
= oss
->returned
;
112 vorbis_info_clear(&vi
);
113 vorbis_comment_clear(&vc
);
114 ogg_stream_clear(&stream
);
118 static void set_chunk_tv(int num_frames
, int num_chunks
, int frequency
,
119 struct timeval
*result
)
121 uint64_t x
= (uint64_t)num_frames
* 1000 * 1000
122 / frequency
/ num_chunks
;
124 result
->tv_sec
= x
/ 1000 / 1000;
125 result
->tv_usec
= x
% (1000 * 1000);
126 PARA_INFO_LOG("%d chunks, chunk time: %lums\n", num_chunks
,
130 /* Write tech data to given audio format handler struct. */
131 static int ogg_get_file_info(char *map
, size_t numbytes
, __a_unused
int fd
,
132 struct afh_info
*afhi
)
138 int ret
, i
, j
, frames_per_chunk
, ct_size
;
139 long long unsigned num_frames
= 0;
141 afhi
->info_string
= NULL
;
144 buf
= ogg_sync_buffer(&oss
, len
);
147 memcpy(buf
, map
, len
);
149 if (ogg_sync_wrote(&oss
, len
) < 0)
151 ret
= read_vorbis_info(&oss
, afhi
);
156 /* count ogg packages and get duration of the file */
157 for (i
= 0; ogg_sync_pageseek(&oss
, &op
) > 0; i
++)
158 num_frames
= ogg_page_granulepos(&op
);
159 PARA_INFO_LOG("%d pages, %llu frames\n", i
, num_frames
);
163 afhi
->seconds_total
= num_frames
/ afhi
->frequency
;
164 /* use roughly one page per chunk */
165 frames_per_chunk
= num_frames
/ i
;
166 PARA_INFO_LOG("%lu seconds, %d frames/chunk\n",
167 afhi
->seconds_total
, frames_per_chunk
);
169 afhi
->chunk_table
= para_malloc(ct_size
* sizeof(uint32_t));
170 afhi
->chunk_table
[0] = 0;
171 afhi
->chunk_table
[1] = afhi
->header_len
;
172 oss
.returned
= afhi
->header_len
;
174 for (i
= 0, j
= 1; ogg_sync_pageseek(&oss
, &op
) > 0; i
++) {
175 int granule
= ogg_page_granulepos(&op
);
177 while (granule
> j
* frames_per_chunk
) {
181 afhi
->chunk_table
= para_realloc(
183 ct_size
* sizeof(uint32_t));
185 afhi
->chunk_table
[j
] = oss
.returned
;
188 afhi
->chunks_total
= j
;
189 set_chunk_tv(num_frames
, j
, afhi
->frequency
, &afhi
->chunk_tv
);
190 tv_scale(3, &afhi
->chunk_tv
, &afhi
->eof_tv
);
193 ogg_sync_clear(&oss
);
197 static const char* ogg_suffixes
[] = {"ogg", NULL
};
200 * The init function of the ogg vorbis audio format handler.
202 * \param afh Pointer to the struct to initialize.
204 void ogg_init(struct audio_format_handler
*afh
)
206 afh
->get_file_info
= ogg_get_file_info
,
207 afh
->suffixes
= ogg_suffixes
;