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 #define AACDEC_MAX_PENDING (640 * 1024)
63 static void aacdec_pre_select(struct sched
*s
, struct task
*t
)
65 struct filter_node
*fn
= container_of(t
, struct filter_node
, task
);
66 size_t iqs
= btr_get_input_queue_size(fn
->btrn
);
71 if (btr_bytes_pending(fn
->btrn
) > AACDEC_MAX_PENDING
)
72 return; /* FIXME, should use reasonable bound on timeout */
73 s
->timeout
.tv_sec
= 0;
74 s
->timeout
.tv_usec
= 1;
77 static ssize_t
aacdec(char *input_buffer
, size_t len
, struct filter_node
*fn
)
79 struct private_aacdec_data
*padd
= fn
->private_data
;
80 struct filter_chain
*fc
= fn
->fc
;
82 unsigned char *p
, *outbuffer
;
83 unsigned char *inbuf
= (unsigned char*)input_buffer
;
84 size_t skip
, consumed
= 0;
86 if (fn
->loaded
> fn
->bufsize
* 3 / 5)
88 ret
= *fc
->input_error
;
94 if (!padd
->initialized
) {
95 unsigned long rate
= 0;
96 unsigned char channels
= 0;
97 ret
= aac_find_esds(inbuf
, len
, &skip
, &padd
->decoder_length
);
99 PARA_INFO_LOG("%s\n", para_strerror(-ret
));
100 ret
= NeAACDecInit(padd
->handle
, inbuf
,
101 len
, &rate
, &channels
);
102 PARA_INFO_LOG("decoder init: %d\n", ret
);
104 ret
= -E_AACDEC_INIT
;
109 PARA_INFO_LOG("decoder len: %lu\n",
110 padd
->decoder_length
);
112 p
= inbuf
+ consumed
;
113 ret
= -E_AACDEC_INIT
;
114 if (NeAACDecInit2(padd
->handle
, p
,
115 padd
->decoder_length
, &rate
,
119 fc
->samplerate
= rate
;
120 fc
->channels
= channels
;
121 PARA_INFO_LOG("rate: %u, channels: %d\n",
122 fc
->samplerate
, fc
->channels
);
123 padd
->initialized
= 1;
125 if (padd
->decoder_length
> 0) {
128 ret
= aac_find_entry_point(inbuf
+ consumed
,
129 len
- consumed
, &skip
);
136 PARA_INFO_LOG("entry: %zu\n", padd
->entry
);
139 if (padd
->consumed_total
+ len
< padd
->entry
)
141 if (padd
->consumed_total
< padd
->entry
)
142 consumed
= padd
->entry
- padd
->consumed_total
;
144 for (; consumed
< len
; consumed
++)
145 if ((inbuf
[consumed
] & 0xfe) == 0x20)
149 p
= inbuf
+ consumed
;
150 outbuffer
= NeAACDecDecode(padd
->handle
, &padd
->frame_info
, p
,
152 if (padd
->frame_info
.error
) {
154 if (padd
->error_count
++ > MAX_ERRORS
)
156 PARA_ERROR_LOG("frame_error: %d, consumed: %zu + %zd + %lu\n",
157 padd
->frame_info
.error
, padd
->consumed_total
,
158 consumed
, padd
->frame_info
.bytesconsumed
);
159 PARA_ERROR_LOG("%s\n", NeAACDecGetErrorMessage(
160 padd
->frame_info
.error
));
161 consumed
++; /* catch 21 */
164 padd
->error_count
= 0;
165 consumed
+= padd
->frame_info
.bytesconsumed
;
167 if (!padd
->frame_info
.samples
)
169 ret
= -E_AAC_OVERRUN
;
170 if (padd
->frame_info
.samples
* 2 + fn
->loaded
> fn
->bufsize
)
172 for (i
= 0; i
< padd
->frame_info
.samples
; i
++) {
173 short *s
= (short *)outbuffer
;
174 write_int16_host_endian(fn
->buf
+ fn
->loaded
, s
[i
]);
181 padd
->consumed_total
+= ret
;
185 static int aacdec_execute(struct btr_node
*btrn
, const char *cmd
, char **result
)
187 struct filter_node
*fn
= btr_context(btrn
);
188 struct private_aacdec_data
*padd
= fn
->private_data
;
190 if (!strcmp(cmd
, "samplerate")) {
191 if (padd
->samplerate
== 0)
192 return -ERRNO_TO_PARA_ERROR(ENAVAIL
);
193 *result
= make_message("%u", padd
->samplerate
);
196 if (!strcmp(cmd
, "channels")) {
197 if (padd
->channels
== 0)
198 return -ERRNO_TO_PARA_ERROR(ENAVAIL
);
199 *result
= make_message("%u", padd
->channels
);
202 return -ERRNO_TO_PARA_ERROR(ENOTSUP
);
205 static void aacdec_open(struct filter_node
*fn
)
207 struct private_aacdec_data
*padd
= para_calloc(sizeof(*padd
));
209 fn
->private_data
= padd
;
210 fn
->bufsize
= AAC_OUTBUF_SIZE
;
211 fn
->buf
= para_calloc(fn
->bufsize
);
213 padd
->handle
= aac_open();
216 static void aacdec_close(struct filter_node
*fn
)
218 struct private_aacdec_data
*padd
= fn
->private_data
;
220 NeAACDecClose(padd
->handle
);
224 fn
->private_data
= NULL
;
227 static void aacdec_post_select(__a_unused
struct sched
*s
, struct task
*t
)
229 struct filter_node
*fn
= container_of(t
, struct filter_node
, task
);
230 struct btr_node
*btrn
= fn
->btrn
;
231 struct private_aacdec_data
*padd
= fn
->private_data
;
233 unsigned char *p
, *inbuf
, *outbuffer
;
235 size_t len
, skip
, consumed
= 0, loaded
, iqs
;
239 ret
= prepare_filter_node(btrn
, fn
->min_iqs
);
244 len
= btr_next_buffer(btrn
, (char **)&inbuf
);
245 iqs
= btr_get_input_queue_size(btrn
);
246 if (!padd
->initialized
) {
247 unsigned long rate
= 0;
248 unsigned char channels
= 0;
249 ret
= aac_find_esds(inbuf
, len
, &skip
, &padd
->decoder_length
);
251 PARA_INFO_LOG("%s\n", para_strerror(-ret
));
252 ret
= NeAACDecInit(padd
->handle
, inbuf
,
253 len
, &rate
, &channels
);
254 PARA_INFO_LOG("decoder init: %d\n", ret
);
256 ret
= -E_AACDEC_INIT
;
261 PARA_INFO_LOG("decoder len: %lu\n",
262 padd
->decoder_length
);
264 p
= inbuf
+ consumed
;
265 ret
= -E_AACDEC_INIT
;
266 if (NeAACDecInit2(padd
->handle
, p
,
267 padd
->decoder_length
, &rate
,
271 padd
->samplerate
= rate
;
272 padd
->channels
= channels
;
273 PARA_INFO_LOG("rate: %u, channels: %d\n",
274 padd
->samplerate
, padd
->channels
);
275 padd
->initialized
= 1;
277 if (padd
->decoder_length
> 0) {
280 ret
= aac_find_entry_point(inbuf
+ consumed
,
281 len
- consumed
, &skip
);
288 PARA_INFO_LOG("entry: %zu\n", padd
->entry
);
291 if (padd
->consumed_total
+ len
< padd
->entry
)
293 if (padd
->consumed_total
< padd
->entry
)
294 consumed
= padd
->entry
- padd
->consumed_total
;
296 for (; consumed
< len
; consumed
++)
297 if ((inbuf
[consumed
] & 0xfe) == 0x20)
301 p
= inbuf
+ consumed
;
302 //PARA_CRIT_LOG("consumed: %zu (%zu + %zu), have: %zu\n", padd->consumed_total + consumed,
303 // padd->consumed_total, consumed, len - consumed);
304 outbuffer
= NeAACDecDecode(padd
->handle
, &padd
->frame_info
, p
,
306 if (padd
->frame_info
.error
) {
307 int err
= padd
->frame_info
.error
;
309 if (padd
->error_count
++ > MAX_ERRORS
)
311 PARA_ERROR_LOG("frame_error: %d (%s), consumed: %zu + %zd + %lu\n",
312 err
, NeAACDecGetErrorMessage(padd
->frame_info
.error
),
313 padd
->consumed_total
, consumed
,
314 padd
->frame_info
.bytesconsumed
);
315 PARA_ERROR_LOG("%s\n", NeAACDecGetErrorMessage(
316 padd
->frame_info
.error
));
317 consumed
++; /* catch 21 */
320 padd
->error_count
= 0;
321 //PARA_CRIT_LOG("decoder ate %lu\n", padd->frame_info.bytesconsumed);
322 consumed
+= padd
->frame_info
.bytesconsumed
;
324 if (!padd
->frame_info
.samples
)
326 btr_buf
= para_malloc(2 * padd
->frame_info
.samples
);
328 for (i
= 0; i
< padd
->frame_info
.samples
; i
++) {
329 short sh
= ((short *)outbuffer
)[i
];
330 write_int16_host_endian(btr_buf
+ loaded
, sh
);
333 btr_add_output(btr_buf
, loaded
, btrn
);
338 padd
->consumed_total
+= ret
;
339 btr_consume(btrn
, ret
);
350 * the init function of the aacdec filter
352 * \param f pointer to the filter struct to initialize
356 void aacdec_filter_init(struct filter
*f
)
358 f
->open
= aacdec_open
;
360 f
->close
= aacdec_close
;
361 f
->pre_select
= aacdec_pre_select
;
362 f
->post_select
= aacdec_post_select
;
363 f
->post_select
= aacdec_post_select
;
364 f
->execute
= aacdec_execute
;