aacdec: Rename some functions
[paraslash.git] / aacdec.c
1 /*
2 * Copyright (C) 2006 Andre Noll <maan@systemlinux.org>
3 *
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.
8 *
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.
13 *
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.
17 */
18
19 /*
20 * based in parts on libfaad, Copyright (C) 2003-2005 M. Bakker,
21 * Ahead Software AG
22 */
23
24 /** \file aacdec.c paraslash's mp3 decoder */
25
26 #include "para.h"
27
28 #include "list.h"
29 #include "filter.h"
30 #include "error.h"
31 #include "string.h"
32 #include "aac.h"
33
34 /** the output buffer size */
35 #define MAX_CHANNELS 6
36 #define AAC_OUTBUF_SIZE (FAAD_MIN_STREAMSIZE * MAX_CHANNELS)
37
38 /**
39 * data specific to the aacdec filter
40 *
41 * \sa filter, filter_node
42 */
43 struct private_aacdec_data {
44 NeAACDecHandle decoder;
45 NeAACDecFrameInfo frame_info;
46
47 int initialized;
48 int decoder_length;
49 long unsigned consumed_total;
50
51 long unsigned entry;
52 };
53
54 static ssize_t aacdec(char *input_buffer, size_t len, struct filter_node *fn)
55 {
56 struct private_aacdec_data *padd = fn->private_data;
57 struct filter_chain_info *fci = fn->fci;
58 unsigned long rate = 0;
59 unsigned char channels = 0;
60 int i, ret, skip;
61 unsigned char *p, *outbuffer;
62 unsigned char *inbuf = (unsigned char*)input_buffer;
63 size_t consumed = 0;
64
65 if (fn->loaded > fn->bufsize * 4 / 5)
66 return 0;
67 if (len < 1000 && !*fci->eof)
68 return 0;
69
70 if (!padd->initialized) {
71 padd->decoder_length = aac_find_esds(inbuf, len, &skip);
72 PARA_INFO_LOG("decoder len: %d\n", padd->decoder_length);
73 if (padd->decoder_length < 0) {
74 ret = NeAACDecInit(padd->decoder, inbuf,
75 len, &rate, &channels);
76 PARA_INFO_LOG("decoder init: %d\n", ret);
77 if (ret < 0) {
78 ret = -E_AACDEC_INIT;
79 goto out;
80 }
81 consumed = ret;
82 } else {
83 consumed += skip;
84 p = inbuf + consumed;
85 ret = -E_AACDEC_INIT;
86 if (NeAACDecInit2(padd->decoder, p,
87 padd->decoder_length, &rate,
88 &channels) < 0)
89 goto out;
90 }
91 fci->samplerate = rate;
92 fci->channels = channels;
93 PARA_INFO_LOG("rate: %u, channels: %d\n",
94 fci->samplerate, fci->channels);
95 padd->initialized = 1;
96 }
97 if (padd->decoder_length > 0) {
98 consumed = 0;
99 if (!padd->entry) {
100 ret = aac_find_stco(inbuf + consumed, len - consumed,
101 &skip);
102 if (ret < 0) {
103 ret = len;
104 goto out;
105 }
106 consumed += skip;
107 padd->entry = aac_read_int32(inbuf + consumed);
108 PARA_INFO_LOG("entry: %lu\n", padd->entry);
109 }
110 ret = len;
111 if (padd->consumed_total + len < padd->entry)
112 goto out;
113 if (padd->consumed_total < padd->entry)
114 consumed = padd->entry - padd->consumed_total;
115 }
116 for (; consumed < len;consumed++)
117 if ((inbuf[consumed] & 0xfe) == 0x20)
118 break;
119 if (consumed >= len)
120 goto success;
121 p = inbuf + consumed;
122 outbuffer = NeAACDecDecode(padd->decoder, &padd->frame_info, p,
123 len - consumed);
124 ret = -E_AAC_DECODE;
125 if (padd->frame_info.error != 0) {
126 PARA_ERROR_LOG("frame_error: %d, consumed: %lu + %d + %lu\n",
127 padd->frame_info.error, padd->consumed_total,
128 consumed, padd->frame_info.bytesconsumed);
129 PARA_ERROR_LOG("%s\n", NeAACDecGetErrorMessage(
130 padd->frame_info.error));
131 consumed++; /* catch 21 */
132 goto success;
133 }
134 consumed += padd->frame_info.bytesconsumed;
135 ret = consumed;
136 if (!padd->frame_info.samples)
137 goto out;
138 for (i = 0; i < padd->frame_info.samples; i++) {
139 short *s = (short *)outbuffer;
140 fn->buf[fn->loaded++] = s[i] & 0xff;
141 fn->buf[fn->loaded++] = (s[i] >> 8) & 0xff;
142 }
143 success:
144 ret = consumed;
145 out:
146 if (ret > 0)
147 padd->consumed_total += ret;
148 return ret;
149 }
150
151 static void aacdec_open(struct filter_node *fn)
152 {
153 fn->private_data = para_calloc(sizeof(struct private_aacdec_data));
154 struct private_aacdec_data *padd = fn->private_data;
155
156 fn->bufsize = AAC_OUTBUF_SIZE;
157 fn->buf = para_calloc(fn->bufsize);
158 padd->decoder = aac_open();
159 }
160
161 static void aacdec_close(struct filter_node *fn)
162 {
163 struct private_aacdec_data *padd = fn->private_data;
164
165 NeAACDecClose(padd->decoder);
166 free(fn->buf);
167 fn->buf = NULL;
168 free(padd);
169 fn->private_data = NULL;
170 }
171
172 /**
173 * the init function of the mp3dec filter
174 *
175 * \sa filter::init
176 */
177 void aacdec_init(struct filter *f)
178 {
179 f->open = aacdec_open;
180 f->convert = aacdec;
181 f->close = aacdec_close;
182 }