build: Compile with -Wdiscarded-qualifiers.
[paraslash.git] / aacdec_filter.c
1 /* Copyright (C) 2006 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
2 /*
3 * based in parts on libfaad, Copyright (C) 2003-2005 M. Bakker,
4 * Ahead Software AG
5 */
6
7 /** \file aacdec_filter.c paraslash's aac (m4a) decoder. */
8
9 #include <regex.h>
10 #include <neaacdec.h>
11
12 #include "para.h"
13 #include "portable_io.h"
14 #include "list.h"
15 #include "sched.h"
16 #include "buffer_tree.h"
17 #include "filter.h"
18 #include "error.h"
19 #include "string.h"
20
21 /** Give up decoding after that many errors. */
22 #define MAX_ERRORS 20
23
24 /**
25 * data specific to the aacdec filter
26 *
27 * \sa \ref filter, \ref filter_node.
28 */
29 struct private_aacdec_data {
30 /** the return value of aac_open */
31 NeAACDecHandle handle;
32 /** whether this instance of the aac decoder is already initialized */
33 bool initialized;
34 /** number of times the decoder returned an error */
35 unsigned error_count;
36 /** number of bytes already consumed from the imput stream */
37 size_t consumed_total;
38 /** The number of channels of the current stream. */
39 unsigned int channels;
40 /** Current sample rate in Hz. */
41 unsigned int sample_rate;
42 };
43
44 static int aacdec_execute(struct btr_node *btrn, const char *cmd, char **result)
45 {
46 struct filter_node *fn = btr_context(btrn);
47 struct private_aacdec_data *padd = fn->private_data;
48
49 return decoder_execute(cmd, padd->sample_rate, padd->channels, result);
50 }
51
52 static void aacdec_open(struct filter_node *fn)
53 {
54 NeAACDecConfigurationPtr c;
55 struct private_aacdec_data *padd = para_calloc(sizeof(*padd));
56
57 padd->handle = NeAACDecOpen();
58 c = NeAACDecGetCurrentConfiguration(padd->handle);
59 c->defObjectType = LC;
60 c->outputFormat = FAAD_FMT_16BIT;
61 c->downMatrix = 0;
62 NeAACDecSetConfiguration(padd->handle, c);
63
64 fn->private_data = padd;
65 fn->min_iqs = 2048;
66 }
67
68 static void aacdec_close(struct filter_node *fn)
69 {
70 struct private_aacdec_data *padd = fn->private_data;
71
72 NeAACDecClose(padd->handle);
73 free(padd);
74 fn->private_data = NULL;
75 }
76
77 static int aacdec_post_select(__a_unused struct sched *s, void *context)
78 {
79 struct filter_node *fn = context;
80 struct btr_node *btrn = fn->btrn;
81 struct private_aacdec_data *padd = fn->private_data;
82 int i, ret;
83 char *inbuf, *outbuf, *btrbuf;
84 size_t len, consumed, loaded = 0;
85 NeAACDecFrameInfo frame_info;
86
87 next_buffer:
88 ret = btr_node_status(btrn, fn->min_iqs, BTR_NT_INTERNAL);
89 if (ret < 0)
90 goto err;
91 if (ret == 0)
92 return 0;
93 btr_merge(btrn, fn->min_iqs);
94 len = btr_next_buffer(btrn, &inbuf);
95 len = PARA_MIN(len, (size_t)8192);
96 consumed = 0;
97 if (!padd->initialized) {
98 unsigned long rate = 0;
99 unsigned char channels = 0;
100 ret = NeAACDecInit(padd->handle, (unsigned char *)inbuf,
101 len, &rate, &channels);
102 PARA_INFO_LOG("decoder init: %d\n", ret);
103 if (ret < 0) {
104 ret = -E_AACDEC_INIT;
105 goto err;
106 }
107 consumed = ret;
108 padd->sample_rate = rate;
109 padd->channels = channels;
110 PARA_INFO_LOG("rate: %u, channels: %u\n",
111 padd->sample_rate, padd->channels);
112 padd->initialized = true;
113 }
114 if (consumed >= len)
115 goto success;
116 //PARA_CRIT_LOG("consumed: %zu (%zu + %zu), have: %zu\n", padd->consumed_total + consumed,
117 // padd->consumed_total, consumed, len - consumed);
118 outbuf = NeAACDecDecode(padd->handle, &frame_info,
119 (unsigned char *)inbuf + consumed, len - consumed);
120 if (frame_info.error) {
121 int err = frame_info.error;
122 ret = -E_AAC_DECODE;
123 if (padd->error_count++ > MAX_ERRORS)
124 goto err;
125 PARA_NOTICE_LOG("error #%u: (%s)\n", padd->error_count,
126 NeAACDecGetErrorMessage(err));
127 PARA_NOTICE_LOG("consumed (total, buffer, frame): "
128 "%zu, %zu, %lu\n",
129 padd->consumed_total, consumed,
130 frame_info.bytesconsumed);
131 consumed++; /* just eat one byte and hope for the best */
132 goto success;
133 }
134 padd->error_count = 0;
135 //PARA_CRIT_LOG("decoder ate %lu\n", frame_info.bytesconsumed);
136 consumed += frame_info.bytesconsumed;
137 if (!frame_info.samples)
138 goto success;
139 btrbuf = para_malloc(2 * frame_info.samples);
140 for (i = 0; i < frame_info.samples; i++) {
141 short sh = ((short *)outbuf)[i];
142 write_int16_host_endian(btrbuf + loaded, sh);
143 loaded += 2;
144 }
145 btr_add_output(btrbuf, loaded, btrn);
146 success:
147 btr_consume(btrn, consumed);
148 padd->consumed_total += consumed;
149 if (loaded == 0)
150 goto next_buffer;
151 return 1;
152 err:
153 assert(ret < 0);
154 btr_remove_node(&fn->btrn);
155 return ret;
156 }
157
158 const struct filter lsg_filter_cmd_com_aacdec_user_data = {
159 .open = aacdec_open,
160 .close = aacdec_close,
161 .pre_select = generic_filter_pre_select,
162 .post_select = aacdec_post_select,
163 .execute = aacdec_execute
164 };