2 * Copyright (C) 2006 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.
20 * based in parts on libfaad, Copyright (C) 2003-2005 M. Bakker,
24 /** \file aacdec.c paraslash's mp3 decoder */
34 /** the output buffer size */
35 #define MAX_CHANNELS 6
36 #define AAC_OUTBUF_SIZE (FAAD_MIN_STREAMSIZE * MAX_CHANNELS)
39 * data specific to the aacdec filter
41 * \sa filter, filter_node
43 struct private_mp4dec_data
{
44 NeAACDecHandle decoder
;
45 NeAACDecFrameInfo frame_info
;
50 long unsigned consumed_total
;
55 static ssize_t
mp4dec(char *input_buffer
, size_t len
, struct filter_node
*fn
)
57 struct private_mp4dec_data
*padd
= fn
->private_data
;
58 struct filter_chain_info
*fci
= fn
->fci
;
59 unsigned long rate
= 0;
60 unsigned char channels
= 0;
62 unsigned char *p
, *outbuffer
;
63 unsigned char *inbuf
= (unsigned char*)input_buffer
;
65 if (fn
->loaded
> fn
->bufsize
* 4 / 5)
67 if (len
< 1000 && !*fci
->eof
)
71 if (!padd
->initialized
) {
72 padd
->decoder_length
= aac_find_esds(inbuf
, len
, &skip
);
73 PARA_INFO_LOG("decoder len: %d\n", padd
->decoder_length
);
74 if (padd
->decoder_length
< 0) {
75 ret
= NeAACDecInit(padd
->decoder
, inbuf
,
76 len
, &rate
, &channels
);
77 PARA_INFO_LOG("decoder init: %d\n", ret
);
84 padd
->consumed
+= skip
;
85 p
= inbuf
+ padd
->consumed
;
87 if (NeAACDecInit2(padd
->decoder
, p
,
88 padd
->decoder_length
, &rate
,
92 fci
->samplerate
= rate
;
93 fci
->channels
= channels
;
94 PARA_INFO_LOG("rate: %u, channels: %d\n",
95 fci
->samplerate
, fci
->channels
);
96 padd
->initialized
= 1;
98 if (padd
->decoder_length
> 0) {
101 ret
= aac_find_stco(inbuf
+ padd
->consumed
,
102 len
- padd
->consumed
, &skip
);
107 padd
->consumed
+= skip
;
108 padd
->entry
= aac_read_int32(inbuf
+ padd
->consumed
);
109 PARA_INFO_LOG("entry: %lu\n", padd
->entry
);
112 if (padd
->consumed_total
+ len
< padd
->entry
)
114 if (padd
->consumed_total
< padd
->entry
)
115 padd
->consumed
= padd
->entry
- padd
->consumed_total
;
117 for (; padd
->consumed
< len
; padd
->consumed
++)
118 if ((inbuf
[padd
->consumed
] & 0xfe) == 0x20)
120 if (padd
->consumed
>= len
)
122 p
= inbuf
+ padd
->consumed
;
123 outbuffer
= NeAACDecDecode(padd
->decoder
, &padd
->frame_info
, p
,
124 len
- padd
->consumed
);
126 if (padd
->frame_info
.error
!= 0) {
127 PARA_ERROR_LOG("frame_error: %d, consumed: %lu + %d + %lu\n",
128 padd
->frame_info
.error
, padd
->consumed_total
,
129 padd
->consumed
, padd
->frame_info
.bytesconsumed
);
130 PARA_ERROR_LOG("%s\n", NeAACDecGetErrorMessage(
131 padd
->frame_info
.error
));
132 padd
->consumed
++; /* catch 21 */
135 padd
->consumed
+= padd
->frame_info
.bytesconsumed
;
136 ret
= padd
->consumed
;
137 if (!padd
->frame_info
.samples
)
139 for (i
= 0; i
< padd
->frame_info
.samples
; i
++) {
140 short *s
= (short *)outbuffer
;
141 fn
->buf
[fn
->loaded
++] = s
[i
] & 0xff;
142 fn
->buf
[fn
->loaded
++] = (s
[i
] >> 8) & 0xff;
145 ret
= padd
->consumed
;
148 padd
->consumed_total
+= ret
;
152 static void mp4dec_open(struct filter_node
*fn
)
154 fn
->private_data
= para_calloc(sizeof(struct private_mp4dec_data
));
155 struct private_mp4dec_data
*padd
= fn
->private_data
;
157 fn
->bufsize
= AAC_OUTBUF_SIZE
;
158 fn
->buf
= para_calloc(fn
->bufsize
);
159 padd
->decoder
= aac_open();
162 static void mp4dec_close(struct filter_node
*fn
)
164 struct private_mp4dec_data
*padd
= fn
->private_data
;
166 NeAACDecClose(padd
->decoder
);
170 fn
->private_data
= NULL
;
174 * the init function of the mp3dec filter
178 void aacdec_init(struct filter
*f
)
180 f
->open
= mp4dec_open
;
182 f
->close
= mp4dec_close
;