2 * Copyright (C) 2005-2009 Andre Noll <maan@systemlinux.org>
4 * Licensed under the GPL v2. For licencing details see COPYING.
7 /** \file oggdec_filter.c Paraslash's ogg vorbis decoder. */
10 #include <vorbis/vorbisfile.h>
14 #include "oggdec_filter.cmdline.h"
18 #include "buffer_tree.h"
23 /** Determine byte sex. */
24 #ifdef WORDS_BIGENDIAN
30 /** Data specific to the oggdec filter. */
31 struct private_oggdec_data
{
32 /** Describes an ogg vorbis file. */
34 /** The input buffer. */
36 /** The length of \a inbuf. */
38 /** The number of bytes consumed from the input buffer. */
40 /** When to start producing output. */
41 struct timeval stream_start
;
44 static size_t cb_read(void *buf
, size_t size
, size_t nmemb
, void *datasource
)
46 struct filter_node
*fn
= datasource
;
47 struct private_oggdec_data
*pod
= fn
->private_data
;
48 size_t ret
, have
= pod
->inbuf_len
- pod
->converted
;
49 char *p
= pod
->inbuf
+ pod
->converted
;
51 // PARA_DEBUG_LOG("pod = %p\n", pod);
52 // PARA_DEBUG_LOG("vorbis requests %d bytes, have %d\n", size * nmemb, have);
53 if (pod
->inbuf_len
< size
) {
54 if (*fn
->fc
->input_error
)
59 ret
= PARA_MIN(nmemb
, have
/ size
) * size
;
61 pod
->converted
+= ret
;
66 * Custom data seeking function.
68 * Since we want the data source to be treated as unseekable at all
69 * times, the provided seek callback always returns -1 (failure).
71 static int cb_seek(__a_unused
void *datasource
, __a_unused ogg_int64_t offset
,
72 __a_unused
int whence
)
77 static int cb_close(__a_unused
void *datasource
)
82 static const ov_callbacks ovc
= {
85 .close_func
= cb_close
,
87 * The tell function need not be provided if the data IO abstraction is
93 static void ogg_open(struct filter_node
*fn
)
95 struct private_oggdec_data
*pod
= para_calloc(
96 sizeof(struct private_oggdec_data
));
97 struct oggdec_filter_args_info
*conf
= fn
->conf
;
99 fn
->private_data
= pod
;
100 fn
->bufsize
= conf
->bufsize_arg
* 1024;
101 fn
->buf
= para_malloc(fn
->bufsize
);
104 static void ogg_close(struct filter_node
*fn
)
106 struct private_oggdec_data
*pod
= fn
->private_data
;
108 PARA_DEBUG_LOG("ov_clearing %p, pod = %p\n", pod
->vf
, pod
);
113 PARA_DEBUG_LOG("nothing to close in fc %p, pod = %p\n", pod
->vf
, pod
);
116 free(fn
->private_data
);
117 fn
->private_data
= NULL
;
120 static ssize_t
ogg_convert(char *inbuffer
, size_t len
, struct filter_node
*fn
)
123 struct private_oggdec_data
*pod
= fn
->private_data
;
124 struct oggdec_filter_args_info
*conf
= fn
->conf
;
125 /* make the buffer known to the read callback cb_read() */
126 pod
->inbuf
= inbuffer
;
127 pod
->inbuf_len
= len
;
131 if (*fn
->fc
->input_error
< 0)
132 return *fn
->fc
->input_error
;
135 pod
->vf
= para_malloc(sizeof(struct OggVorbis_File
));
136 PARA_NOTICE_LOG("input buffer: %zd, opening ov callbacks\n", len
);
137 ret
= ov_open_callbacks(fn
, pod
->vf
,
138 NULL
, /* no initial buffer */
139 0, /* no initial bytes */
140 ovc
); /* the ov_open_callbacks */
141 if (ret
== OV_ENOTVORBIS
|| ret
== OV_EBADHEADER
) {
142 /* this might be due to the input buffer being too small */
143 int ib
= 1024 * conf
->initial_buffer_arg
; /* initial buffer */
145 PARA_INFO_LOG("initial input buffer %zd/%d, "
146 "waiting for more data\n", len
, ib
);
151 return ret
== OV_ENOTVORBIS
?
152 -E_OGGDEC_NOTVORBIS
: -E_OGGDEC_BADHEADER
;
155 return -E_OGGDEC_READ
;
156 if (ret
== OV_EVERSION
)
157 return -E_OGGDEC_VERSION
;
159 return -E_OGGDEC_FAULT
;
160 fn
->fc
->channels
= ov_info(pod
->vf
, 0)->channels
;
161 fn
->fc
->samplerate
= ov_info(pod
->vf
, 0)->rate
;
162 PARA_NOTICE_LOG("%d channels, %d Hz\n", fn
->fc
->channels
,
164 /* wait a bit to avoid buffer underruns */
165 tv_add(now
, &(struct timeval
){0, 500 * 1000}, &pod
->stream_start
);
166 return pod
->converted
;
168 if (tv_diff(now
, &pod
->stream_start
, NULL
) < 0) {
169 PARA_DEBUG_LOG("initial delay..\n");
172 while (fn
->loaded
< fn
->bufsize
) {
173 int length
= fn
->bufsize
- fn
->loaded
;
174 long read_ret
= ov_read(pod
->vf
, fn
->buf
+ fn
->loaded
, length
,
175 ENDIAN
, 2 /* 16 bit */, 1 /* signed */, NULL
);
177 return pod
->converted
;
178 if (read_ret
== OV_HOLE
) {
180 PARA_INFO_LOG("hole, delaying playback\n");
181 tv_add(now
, &(struct timeval
){0, 500 * 1000}, &pod
->stream_start
);
183 return pod
->converted
;
186 return -E_OGGDEC_BADLINK
;
187 fn
->loaded
+= read_ret
;
189 return pod
->converted
;
192 static int oggdec_parse_config(int argc
, char **argv
, void **config
)
195 struct oggdec_filter_args_info
*ogg_conf
;
197 ogg_conf
= para_calloc(sizeof(*ogg_conf
));
198 ret
= -E_OGGDEC_SYNTAX
;
199 if (oggdec_cmdline_parser(argc
, argv
, ogg_conf
))
201 ret
= -ERRNO_TO_PARA_ERROR(EINVAL
);
202 if (ogg_conf
->bufsize_arg
< 0)
204 if (ogg_conf
->bufsize_arg
>= INT_MAX
/ 1024)
206 if (ogg_conf
->initial_buffer_arg
< 0)
208 if (ogg_conf
->initial_buffer_arg
>= INT_MAX
/ 1024)
218 * The init function of the ogg vorbis decoder.
220 * \param f Its fields are filled in by the function.
222 void oggdec_filter_init(struct filter
*f
)
224 struct oggdec_filter_args_info dummy
;
226 oggdec_cmdline_parser_init(&dummy
);
228 f
->close
= ogg_close
;
229 f
->convert
= ogg_convert
;
230 f
->parse_config
= oggdec_parse_config
;
231 f
->help
= (struct ggo_help
) {
232 .short_help
= oggdec_filter_args_info_help
,
233 .detailed_help
= oggdec_filter_args_info_detailed_help