2 * Copyright (C) 2006-2009 Andre Noll <maan@systemlinux.org>
4 * Licensed under the GPL v2. For licencing details see COPYING.
7 * based in parts on libfaad, Copyright (C) 2003-2005 M. Bakker,
11 /** \file aacdec_filter.c paraslash's aac (m4a) decoder. */
20 #include "buffer_tree.h"
26 /** the output buffer size */
27 #define AAC_OUTBUF_SIZE (32 * 1024)
29 /** give up decoding after that many errors */
33 * data specific to the aacdec filter
35 * \sa filter, filter_node
37 struct private_aacdec_data
{
38 /** the return value of aac_open */
39 NeAACDecHandle handle
;
40 /** info about the currently decoded frame */
41 NeAACDecFrameInfo frame_info
;
42 /** whether this instance of the aac decoder is already initialized */
45 * return value of aac_find_esds(). Used to call the right aacdec
48 unsigned long decoder_length
;
49 /** number of times the decoder returned an error */
51 /** number of bytes already consumed from the imput stream */
52 size_t consumed_total
;
53 /** return value of aac_find_entry_point */
55 /** The number of channels of the current stream. */
56 unsigned int channels
;
57 /** Current sample rate in Hz. */
58 unsigned int samplerate
;
61 static ssize_t
aacdec(char *input_buffer
, size_t len
, struct filter_node
*fn
)
63 struct private_aacdec_data
*padd
= fn
->private_data
;
64 struct filter_chain
*fc
= fn
->fc
;
66 unsigned char *p
, *outbuffer
;
67 unsigned char *inbuf
= (unsigned char*)input_buffer
;
68 size_t skip
, consumed
= 0;
70 if (fn
->loaded
> fn
->bufsize
* 3 / 5)
72 ret
= *fc
->input_error
;
78 if (!padd
->initialized
) {
79 unsigned long rate
= 0;
80 unsigned char channels
= 0;
81 ret
= aac_find_esds(inbuf
, len
, &skip
, &padd
->decoder_length
);
83 PARA_INFO_LOG("%s\n", para_strerror(-ret
));
84 ret
= NeAACDecInit(padd
->handle
, inbuf
,
85 len
, &rate
, &channels
);
86 PARA_INFO_LOG("decoder init: %d\n", ret
);
93 PARA_INFO_LOG("decoder len: %lu\n",
94 padd
->decoder_length
);
98 if (NeAACDecInit2(padd
->handle
, p
,
99 padd
->decoder_length
, &rate
,
103 fc
->samplerate
= rate
;
104 fc
->channels
= channels
;
105 PARA_INFO_LOG("rate: %u, channels: %d\n",
106 fc
->samplerate
, fc
->channels
);
107 padd
->initialized
= 1;
109 if (padd
->decoder_length
> 0) {
112 ret
= aac_find_entry_point(inbuf
+ consumed
,
113 len
- consumed
, &skip
);
120 PARA_INFO_LOG("entry: %zu\n", padd
->entry
);
123 if (padd
->consumed_total
+ len
< padd
->entry
)
125 if (padd
->consumed_total
< padd
->entry
)
126 consumed
= padd
->entry
- padd
->consumed_total
;
128 for (; consumed
< len
; consumed
++)
129 if ((inbuf
[consumed
] & 0xfe) == 0x20)
133 p
= inbuf
+ consumed
;
134 outbuffer
= NeAACDecDecode(padd
->handle
, &padd
->frame_info
, p
,
136 if (padd
->frame_info
.error
) {
138 if (padd
->error_count
++ > MAX_ERRORS
)
140 PARA_ERROR_LOG("frame_error: %d, consumed: %zu + %zd + %lu\n",
141 padd
->frame_info
.error
, padd
->consumed_total
,
142 consumed
, padd
->frame_info
.bytesconsumed
);
143 PARA_ERROR_LOG("%s\n", NeAACDecGetErrorMessage(
144 padd
->frame_info
.error
));
145 consumed
++; /* catch 21 */
148 padd
->error_count
= 0;
149 consumed
+= padd
->frame_info
.bytesconsumed
;
151 if (!padd
->frame_info
.samples
)
153 ret
= -E_AAC_OVERRUN
;
154 if (padd
->frame_info
.samples
* 2 + fn
->loaded
> fn
->bufsize
)
156 for (i
= 0; i
< padd
->frame_info
.samples
; i
++) {
157 short *s
= (short *)outbuffer
;
158 write_int16_host_endian(fn
->buf
+ fn
->loaded
, s
[i
]);
165 padd
->consumed_total
+= ret
;
169 static int aacdec_execute(struct btr_node
*btrn
, const char *cmd
, char **result
)
171 struct filter_node
*fn
= btr_context(btrn
);
172 struct private_aacdec_data
*padd
= fn
->private_data
;
174 if (!strcmp(cmd
, "samplerate")) {
175 if (padd
->samplerate
== 0)
176 return -ERRNO_TO_PARA_ERROR(ENAVAIL
);
177 *result
= make_message("%u", padd
->samplerate
);
180 if (!strcmp(cmd
, "channels")) {
181 if (padd
->channels
== 0)
182 return -ERRNO_TO_PARA_ERROR(ENAVAIL
);
183 *result
= make_message("%u", padd
->channels
);
186 return -ERRNO_TO_PARA_ERROR(ENOTSUP
);
189 static void aacdec_open(struct filter_node
*fn
)
191 struct private_aacdec_data
*padd
= para_calloc(sizeof(*padd
));
193 fn
->private_data
= padd
;
194 fn
->bufsize
= AAC_OUTBUF_SIZE
;
195 fn
->buf
= para_calloc(fn
->bufsize
);
197 padd
->handle
= aac_open();
200 static void aacdec_close(struct filter_node
*fn
)
202 struct private_aacdec_data
*padd
= fn
->private_data
;
204 NeAACDecClose(padd
->handle
);
208 fn
->private_data
= NULL
;
211 static void aacdec_post_select(__a_unused
struct sched
*s
, struct task
*t
)
213 struct filter_node
*fn
= container_of(t
, struct filter_node
, task
);
214 struct btr_node
*btrn
= fn
->btrn
;
215 struct private_aacdec_data
*padd
= fn
->private_data
;
217 unsigned char *p
, *inbuf
, *outbuffer
;
219 size_t len
, skip
, consumed
= 0, loaded
, iqs
;
223 ret
= prepare_filter_node(fn
);
228 len
= btr_next_buffer(btrn
, (char **)&inbuf
);
229 iqs
= btr_get_input_queue_size(btrn
);
230 if (!padd
->initialized
) {
231 unsigned long rate
= 0;
232 unsigned char channels
= 0;
233 ret
= aac_find_esds(inbuf
, len
, &skip
, &padd
->decoder_length
);
235 PARA_INFO_LOG("%s\n", para_strerror(-ret
));
236 ret
= NeAACDecInit(padd
->handle
, inbuf
,
237 len
, &rate
, &channels
);
238 PARA_INFO_LOG("decoder init: %d\n", ret
);
240 ret
= -E_AACDEC_INIT
;
245 PARA_INFO_LOG("decoder len: %lu\n",
246 padd
->decoder_length
);
248 p
= inbuf
+ consumed
;
249 ret
= -E_AACDEC_INIT
;
250 if (NeAACDecInit2(padd
->handle
, p
,
251 padd
->decoder_length
, &rate
,
255 padd
->samplerate
= rate
;
256 padd
->channels
= channels
;
257 PARA_INFO_LOG("rate: %u, channels: %d\n",
258 padd
->samplerate
, padd
->channels
);
259 padd
->initialized
= 1;
261 if (padd
->decoder_length
> 0) {
264 ret
= aac_find_entry_point(inbuf
+ consumed
,
265 len
- consumed
, &skip
);
272 PARA_INFO_LOG("entry: %zu\n", padd
->entry
);
275 if (padd
->consumed_total
+ len
< padd
->entry
)
277 if (padd
->consumed_total
< padd
->entry
)
278 consumed
= padd
->entry
- padd
->consumed_total
;
280 for (; consumed
< len
; consumed
++)
281 if ((inbuf
[consumed
] & 0xfe) == 0x20)
285 p
= inbuf
+ consumed
;
286 //PARA_CRIT_LOG("consumed: %zu (%zu + %zu), have: %zu\n", padd->consumed_total + consumed,
287 // padd->consumed_total, consumed, len - consumed);
288 outbuffer
= NeAACDecDecode(padd
->handle
, &padd
->frame_info
, p
,
290 if (padd
->frame_info
.error
) {
291 int err
= padd
->frame_info
.error
;
293 if (padd
->error_count
++ > MAX_ERRORS
)
295 PARA_ERROR_LOG("frame_error: %d (%s), consumed: %zu + %zd + %lu\n",
296 err
, NeAACDecGetErrorMessage(padd
->frame_info
.error
),
297 padd
->consumed_total
, consumed
,
298 padd
->frame_info
.bytesconsumed
);
299 PARA_ERROR_LOG("%s\n", NeAACDecGetErrorMessage(
300 padd
->frame_info
.error
));
301 consumed
++; /* catch 21 */
304 padd
->error_count
= 0;
305 //PARA_CRIT_LOG("decoder ate %lu\n", padd->frame_info.bytesconsumed);
306 consumed
+= padd
->frame_info
.bytesconsumed
;
308 if (!padd
->frame_info
.samples
)
310 btr_buf
= para_malloc(2 * padd
->frame_info
.samples
);
312 for (i
= 0; i
< padd
->frame_info
.samples
; i
++) {
313 short sh
= ((short *)outbuffer
)[i
];
314 write_int16_host_endian(btr_buf
+ loaded
, sh
);
317 btr_add_output(btr_buf
, loaded
, btrn
);
322 padd
->consumed_total
+= ret
;
323 btr_consume(btrn
, ret
);
334 * the init function of the aacdec filter
336 * \param f pointer to the filter struct to initialize
340 void aacdec_filter_init(struct filter
*f
)
342 f
->open
= aacdec_open
;
344 f
->close
= aacdec_close
;
345 f
->pre_select
= generic_filter_pre_select
;
346 f
->post_select
= aacdec_post_select
;
347 f
->execute
= aacdec_execute
;