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>
13 #include "oggdec_filter.cmdline.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. */
38 /** When to start producing output. */
39 struct timeval stream_start
;
42 static size_t cb_read(void *buf
, size_t size
, size_t nmemb
, void *datasource
)
44 struct filter_node
*fn
= datasource
;
45 struct private_oggdec_data
*pod
= fn
->private_data
;
46 size_t ret
, have
= pod
->inbuf_len
- pod
->converted
;
47 char *p
= pod
->inbuf
+ pod
->converted
;
49 // PARA_DEBUG_LOG("pod = %p\n", pod);
50 // PARA_DEBUG_LOG("vorbis requests %d bytes, have %d\n", size * nmemb, have);
51 if (pod
->inbuf_len
< size
) {
52 if (*fn
->fc
->input_error
)
57 ret
= PARA_MIN(nmemb
, have
/ size
) * size
;
59 pod
->converted
+= ret
;
64 * Custom data seeking function.
66 * Since we want the data source to be treated as unseekable at all
67 * times, the provided seek callback always returns -1 (failure).
69 static int cb_seek(__a_unused
void *datasource
, __a_unused ogg_int64_t offset
,
70 __a_unused
int whence
)
75 static int cb_close(__a_unused
void *datasource
)
80 static const ov_callbacks ovc
= {
83 .close_func
= cb_close
,
85 * The tell function need not be provided if the data IO abstraction is
91 static void ogg_open(struct filter_node
*fn
)
93 struct private_oggdec_data
*pod
= para_calloc(
94 sizeof(struct private_oggdec_data
));
95 struct oggdec_filter_args_info
*conf
= fn
->conf
;
97 fn
->private_data
= pod
;
98 fn
->bufsize
= conf
->bufsize_arg
* 1024;
99 fn
->buf
= para_malloc(fn
->bufsize
);
102 static void ogg_close(struct filter_node
*fn
)
104 struct private_oggdec_data
*pod
= fn
->private_data
;
106 PARA_DEBUG_LOG("ov_clearing %p, pod = %p\n", pod
->vf
, pod
);
111 PARA_DEBUG_LOG("nothing to close in fc %p, pod = %p\n", pod
->vf
, pod
);
114 free(fn
->private_data
);
115 fn
->private_data
= NULL
;
118 static ssize_t
ogg_convert(char *inbuffer
, size_t len
, struct filter_node
*fn
)
121 struct private_oggdec_data
*pod
= fn
->private_data
;
122 struct oggdec_filter_args_info
*conf
= fn
->conf
;
123 /* make the buffer known to the read callback cb_read() */
124 pod
->inbuf
= inbuffer
;
125 pod
->inbuf_len
= len
;
129 if (*fn
->fc
->input_error
< 0)
130 return *fn
->fc
->input_error
;
133 pod
->vf
= para_malloc(sizeof(struct OggVorbis_File
));
134 PARA_NOTICE_LOG("input buffer: %zd, opening ov callbacks\n", len
);
135 ret
= ov_open_callbacks(fn
, pod
->vf
,
136 NULL
, /* no initial buffer */
137 0, /* no initial bytes */
138 ovc
); /* the ov_open_callbacks */
139 if (ret
== OV_ENOTVORBIS
|| ret
== OV_EBADHEADER
) {
140 /* this might be due to the input buffer being too small */
141 int ib
= 1024 * conf
->initial_buffer_arg
; /* initial buffer */
143 PARA_INFO_LOG("initial input buffer %zd/%d, "
144 "waiting for more data\n", len
, ib
);
149 return ret
== OV_ENOTVORBIS
?
150 -E_OGGDEC_NOTVORBIS
: -E_OGGDEC_BADHEADER
;
153 return -E_OGGDEC_READ
;
154 if (ret
== OV_EVERSION
)
155 return -E_OGGDEC_VERSION
;
157 return -E_OGGDEC_FAULT
;
158 fn
->fc
->channels
= ov_info(pod
->vf
, 0)->channels
;
159 fn
->fc
->samplerate
= ov_info(pod
->vf
, 0)->rate
;
160 PARA_NOTICE_LOG("%d channels, %d Hz\n", fn
->fc
->channels
,
162 /* wait a bit to avoid buffer underruns */
163 tv_add(now
, &(struct timeval
){0, 500 * 1000}, &pod
->stream_start
);
164 return pod
->converted
;
166 if (tv_diff(now
, &pod
->stream_start
, NULL
) < 0) {
167 PARA_DEBUG_LOG("initial delay..\n");
170 while (fn
->loaded
< fn
->bufsize
) {
171 int length
= fn
->bufsize
- fn
->loaded
;
172 long read_ret
= ov_read(pod
->vf
, fn
->buf
+ fn
->loaded
, length
,
173 ENDIAN
, 2 /* 16 bit */, 1 /* signed */, NULL
);
175 return pod
->converted
;
176 if (read_ret
== OV_HOLE
) {
178 PARA_INFO_LOG("hole, delaying playback\n");
179 tv_add(now
, &(struct timeval
){0, 500 * 1000}, &pod
->stream_start
);
181 return pod
->converted
;
184 return -E_OGGDEC_BADLINK
;
185 fn
->loaded
+= read_ret
;
187 return pod
->converted
;
190 static int oggdec_parse_config(int argc
, char **argv
, void **config
)
193 struct oggdec_filter_args_info
*ogg_conf
;
195 ogg_conf
= para_calloc(sizeof(*ogg_conf
));
196 ret
= -E_OGGDEC_SYNTAX
;
197 if (oggdec_cmdline_parser(argc
, argv
, ogg_conf
))
199 ret
= -ERRNO_TO_PARA_ERROR(EINVAL
);
200 if (ogg_conf
->bufsize_arg
< 0)
202 if (ogg_conf
->bufsize_arg
>= INT_MAX
/ 1024)
204 if (ogg_conf
->initial_buffer_arg
< 0)
206 if (ogg_conf
->initial_buffer_arg
>= INT_MAX
/ 1024)
216 * The init function of the ogg vorbis decoder.
218 * \param f Its fields are filled in by the function.
220 void oggdec_filter_init(struct filter
*f
)
222 struct oggdec_filter_args_info dummy
;
224 oggdec_cmdline_parser_init(&dummy
);
226 f
->close
= ogg_close
;
227 f
->convert
= ogg_convert
;
228 f
->parse_config
= oggdec_parse_config
;
229 f
->help
= (struct ggo_help
) {
230 .short_help
= oggdec_filter_args_info_help
,
231 .detailed_help
= oggdec_filter_args_info_detailed_help