/*
- * Copyright (C) 2006 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2006-2007 Andre Noll <maan@systemlinux.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*/
-
/*
* based in parts on libfaad, Copyright (C) 2003-2005 M. Bakker,
* Ahead Software AG
*/
-/** \file aacdec.c paraslash's mp3 decoder */
+/** \file aacdec.c paraslash's aac (m4a) decoder */
#include "para.h"
#include "list.h"
+#include "sched.h"
#include "filter.h"
#include "error.h"
#include "string.h"
#include "aac.h"
/** the output buffer size */
-#define MAX_CHANNELS 6
-#define AAC_OUTBUF_SIZE (FAAD_MIN_STREAMSIZE * MAX_CHANNELS)
+#define AAC_OUTBUF_SIZE (32 * 1024)
+
+/** give up decoding after that many errors */
+#define MAX_ERRORS 20
/**
* data specific to the aacdec filter
* \sa filter, filter_node
*/
struct private_aacdec_data {
- NeAACDecHandle decoder;
+ /** the return value of aac_open */
+ NeAACDecHandle handle;
+ /** info about the currently decoded frame */
NeAACDecFrameInfo frame_info;
-
+ /** whether this instance of the aac decoder is already initialized */
int initialized;
- int decoder_length;
- long unsigned consumed_total;
-
- long unsigned entry;
+ /**
+ * return value of aac_find_esds(). Used to call the right aacdec
+ * init function
+ */
+ unsigned long decoder_length;
+ /** number of times the decoder returned an error */
+ unsigned error_count;
+ /** number of bytes already consumed from the imput stream */
+ size_t consumed_total;
+ /** return value of aac_find_entry_point */
+ size_t entry;
};
static ssize_t aacdec(char *input_buffer, size_t len, struct filter_node *fn)
{
struct private_aacdec_data *padd = fn->private_data;
- struct filter_chain_info *fci = fn->fci;
- unsigned long rate = 0;
- unsigned char channels = 0;
- int i, ret, skip;
+ struct filter_chain *fc = fn->fc;
+ int i, ret;
unsigned char *p, *outbuffer;
unsigned char *inbuf = (unsigned char*)input_buffer;
- size_t consumed = 0;
+ size_t skip, consumed = 0;
- if (fn->loaded > fn->bufsize * 4 / 5)
+ if (fn->loaded > fn->bufsize * 3 / 5)
return 0;
- if (len < 1000 && !*fci->eof)
+ if (len < 2048 && !*fc->input_eof)
return 0;
if (!padd->initialized) {
- padd->decoder_length = aac_find_esds(inbuf, len, &skip);
- PARA_INFO_LOG("decoder len: %d\n", padd->decoder_length);
- if (padd->decoder_length < 0) {
- ret = NeAACDecInit(padd->decoder, inbuf,
+ unsigned long rate = 0;
+ unsigned char channels = 0;
+ ret = aac_find_esds(inbuf, len, &skip, &padd->decoder_length);
+ if (ret < 0) {
+ PARA_INFO_LOG("%s\n", PARA_STRERROR(-ret));
+ ret = NeAACDecInit(padd->handle, inbuf,
len, &rate, &channels);
PARA_INFO_LOG("decoder init: %d\n", ret);
if (ret < 0) {
}
consumed = ret;
} else {
+ PARA_INFO_LOG("decoder len: %lu\n",
+ padd->decoder_length);
consumed += skip;
p = inbuf + consumed;
ret = -E_AACDEC_INIT;
- if (NeAACDecInit2(padd->decoder, p,
+ if (NeAACDecInit2(padd->handle, p,
padd->decoder_length, &rate,
&channels) < 0)
goto out;
}
- fci->samplerate = rate;
- fci->channels = channels;
+ fc->samplerate = rate;
+ fc->channels = channels;
PARA_INFO_LOG("rate: %u, channels: %d\n",
- fci->samplerate, fci->channels);
+ fc->samplerate, fc->channels);
padd->initialized = 1;
}
if (padd->decoder_length > 0) {
consumed = 0;
if (!padd->entry) {
- ret = aac_find_stco(inbuf + consumed, len - consumed,
- &skip);
+ ret = aac_find_entry_point(inbuf + consumed,
+ len - consumed, &skip);
if (ret < 0) {
ret = len;
goto out;
}
consumed += skip;
- padd->entry = aac_read_int32(inbuf + consumed);
- PARA_INFO_LOG("entry: %lu\n", padd->entry);
+ padd->entry = ret;
+ PARA_INFO_LOG("entry: %zu\n", padd->entry);
}
ret = len;
if (padd->consumed_total + len < padd->entry)
if (padd->consumed_total < padd->entry)
consumed = padd->entry - padd->consumed_total;
}
- for (; consumed < len;consumed++)
+ for (; consumed < len; consumed++)
if ((inbuf[consumed] & 0xfe) == 0x20)
break;
if (consumed >= len)
goto success;
p = inbuf + consumed;
- outbuffer = NeAACDecDecode(padd->decoder, &padd->frame_info, p,
+ outbuffer = NeAACDecDecode(padd->handle, &padd->frame_info, p,
len - consumed);
- ret = -E_AAC_DECODE;
- if (padd->frame_info.error != 0) {
- PARA_ERROR_LOG("frame_error: %d, consumed: %lu + %d + %lu\n",
+ if (padd->frame_info.error) {
+ ret = -E_AAC_DECODE;
+ if (padd->error_count++ > MAX_ERRORS)
+ goto out;
+ PARA_ERROR_LOG("frame_error: %d, consumed: %zu + %zd + %lu\n",
padd->frame_info.error, padd->consumed_total,
consumed, padd->frame_info.bytesconsumed);
PARA_ERROR_LOG("%s\n", NeAACDecGetErrorMessage(
consumed++; /* catch 21 */
goto success;
}
+ padd->error_count = 0;
consumed += padd->frame_info.bytesconsumed;
ret = consumed;
if (!padd->frame_info.samples)
goto out;
+ ret = -E_AAC_OVERRUN;
+ if (padd->frame_info.samples * 2 + fn->loaded > fn->bufsize)
+ goto out;
for (i = 0; i < padd->frame_info.samples; i++) {
short *s = (short *)outbuffer;
- fn->buf[fn->loaded++] = s[i] & 0xff;
- fn->buf[fn->loaded++] = (s[i] >> 8) & 0xff;
+ write_int16_host_endian(fn->buf + fn->loaded, s[i]);
+ fn->loaded += 2;
}
success:
ret = consumed;
fn->bufsize = AAC_OUTBUF_SIZE;
fn->buf = para_calloc(fn->bufsize);
- padd->decoder = aac_open();
+ padd->handle = aac_open();
}
static void aacdec_close(struct filter_node *fn)
{
struct private_aacdec_data *padd = fn->private_data;
- NeAACDecClose(padd->decoder);
+ NeAACDecClose(padd->handle);
free(fn->buf);
fn->buf = NULL;
free(padd);
}
/**
- * the init function of the mp3dec filter
+ * the init function of the aacdec filter
+ *
+ * \param f pointer to the filter struct to initialize
*
* \sa filter::init
*/
projects / paraslash.git / blobdiff