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;