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. */
11 #include "oggdec_filter.cmdline.h"
19 #include <vorbis/vorbisfile.h>
21 /** Determine byte sex. */
22 #ifdef WORDS_BIGENDIAN
28 /** Data specific to the oggdec filter. */
29 struct private_oggdec_data
{
30 /** Describes an ogg vorbis file. */
32 /** The input buffer. */
34 /** The length of \a inbuf. */
36 /** The number of bytes consumed from the input buffer. */
40 static size_t cb_read(void *buf
, size_t size
, size_t nmemb
, void *datasource
)
42 struct filter_node
*fn
= datasource
;
43 struct private_oggdec_data
*pod
= fn
->private_data
;
44 size_t ret
, have
= pod
->inbuf_len
- pod
->converted
;
45 char *p
= pod
->inbuf
+ pod
->converted
;
47 // PARA_DEBUG_LOG("pod = %p\n", pod);
48 // PARA_DEBUG_LOG("vorbis requests %d bytes, have %d\n", size * nmemb, have);
49 if (pod
->inbuf_len
< size
) {
50 if (*fn
->fc
->input_error
)
55 ret
= PARA_MIN(nmemb
, have
/ size
) * size
;
57 pod
->converted
+= ret
;
62 * Custom data seeking function.
64 * Since we want the data source to be treated as unseekable at all
65 * times, the provided seek callback always returns -1 (failure).
67 static int cb_seek(__a_unused
void *datasource
, __a_unused ogg_int64_t offset
,
68 __a_unused
int whence
)
73 static int cb_close(__a_unused
void *datasource
)
78 static const ov_callbacks ovc
= {
81 .close_func
= cb_close
,
83 * The tell function need not be provided if the data IO abstraction is
89 static void ogg_open(struct filter_node
*fn
)
91 struct private_oggdec_data
*pod
= para_calloc(
92 sizeof(struct private_oggdec_data
));
93 struct oggdec_filter_args_info
*conf
= fn
->conf
;
95 fn
->private_data
= pod
;
96 fn
->bufsize
= conf
->bufsize_arg
* 1024;
97 fn
->buf
= para_malloc(fn
->bufsize
);
100 static void ogg_close(struct filter_node
*fn
)
102 struct private_oggdec_data
*pod
= fn
->private_data
;
104 PARA_DEBUG_LOG("ov_clearing %p, pod = %p\n", pod
->vf
, pod
);
109 PARA_DEBUG_LOG("nothing to close in fc %p, pod = %p\n", pod
->vf
, pod
);
112 free(fn
->private_data
);
113 fn
->private_data
= NULL
;
116 static ssize_t
ogg_convert(char *inbuffer
, size_t len
, struct filter_node
*fn
)
119 struct private_oggdec_data
*pod
= fn
->private_data
;
120 struct oggdec_filter_args_info
*conf
= fn
->conf
;
121 /* make the buffer known to the read callback cb_read() */
122 pod
->inbuf
= inbuffer
;
123 pod
->inbuf_len
= len
;
127 int ib
= 1024 * conf
->initial_buffer_arg
; /* initial buffer */
128 if (*fn
->fc
->input_error
< 0)
129 return *fn
->fc
->input_error
;
131 PARA_DEBUG_LOG("initial input buffer %zd/%d, "
132 "waiting for more data\n", len
, ib
);
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 */
142 return -E_OGGDEC_READ
;
143 if (ret
== OV_ENOTVORBIS
)
144 return -E_OGGDEC_NOTVORBIS
;
145 if (ret
== OV_EVERSION
)
146 return -E_OGGDEC_VERSION
;
147 if (ret
== OV_EBADHEADER
)
148 return -E_OGGDEC_BADHEADER
;
150 return -E_OGGDEC_FAULT
;
151 fn
->fc
->channels
= ov_info(pod
->vf
, 0)->channels
;
152 fn
->fc
->samplerate
= ov_info(pod
->vf
, 0)->rate
;
153 PARA_NOTICE_LOG("%d channels, %d Hz\n", fn
->fc
->channels
,
156 while (fn
->loaded
< fn
->bufsize
) {
157 int length
= fn
->bufsize
- fn
->loaded
;
158 long read_ret
= ov_read(pod
->vf
, fn
->buf
+ fn
->loaded
, length
,
159 ENDIAN
, 2 /* 16 bit */, 1 /* signed */, NULL
);
160 if (read_ret
== OV_HOLE
|| !read_ret
)
161 return pod
->converted
;
163 return -E_OGGDEC_BADLINK
;
164 fn
->loaded
+= read_ret
;
166 return pod
->converted
;
169 static int oggdec_parse_config(int argc
, char **argv
, void **config
)
172 struct oggdec_filter_args_info
*ogg_conf
;
174 ogg_conf
= para_calloc(sizeof(*ogg_conf
));
175 ret
= -E_OGGDEC_SYNTAX
;
176 if (oggdec_cmdline_parser(argc
, argv
, ogg_conf
))
178 ret
= -ERRNO_TO_PARA_ERROR(EINVAL
);
179 if (ogg_conf
->bufsize_arg
< 0)
181 if (ogg_conf
->bufsize_arg
>= INT_MAX
/ 1024)
183 if (ogg_conf
->initial_buffer_arg
< 0)
185 if (ogg_conf
->initial_buffer_arg
>= INT_MAX
/ 1024)
195 * The init function of the ogg vorbis decoder.
197 * \param f Its fields are filled in by the function.
199 void oggdec_filter_init(struct filter
*f
)
201 struct oggdec_filter_args_info dummy
;
203 oggdec_cmdline_parser_init(&dummy
);
205 f
->close
= ogg_close
;
206 f
->convert
= ogg_convert
;
207 f
->parse_config
= oggdec_parse_config
;
208 f
->help
= (struct ggo_help
) {
209 .short_help
= oggdec_filter_args_info_help
,
210 .detailed_help
= oggdec_filter_args_info_detailed_help