/*
- * Copyright (C) 2006-2013 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2006 Andre Noll <maan@tuebingen.mpg.de>
*
* Licensed under the GPL v2. For licencing details see COPYING.
*/
/** \file aacdec_filter.c paraslash's aac (m4a) decoder. */
#include <regex.h>
+#include <neaacdec.h>
#include "para.h"
+#include "portable_io.h"
#include "list.h"
#include "sched.h"
#include "ggo.h"
#include "filter.h"
#include "error.h"
#include "string.h"
-#include "aac.h"
/** Give up decoding after that many errors. */
#define MAX_ERRORS 20
unsigned int sample_rate;
};
+/*
+ * Get a new libfaad decoder handle.
+ *
+ * \return The handle returned by NeAACDecOpen().
+ */
+static NeAACDecHandle aac_open(void)
+{
+ NeAACDecHandle h = NeAACDecOpen();
+ NeAACDecConfigurationPtr c = NeAACDecGetCurrentConfiguration(h);
+
+ c->defObjectType = LC;
+ c->outputFormat = FAAD_FMT_16BIT;
+ c->downMatrix = 0;
+ NeAACDecSetConfiguration(h, c);
+ return h;
+}
+
+static unsigned long aac_read_decoder_length(char *buf, int *description_len)
+{
+ uint8_t b;
+ uint8_t numBytes = 0;
+ unsigned long length = 0;
+
+ do {
+ b = buf[numBytes];
+ numBytes++;
+ length = (length << 7) | (b & 0x7F);
+ } while
+ ((b & 0x80) && numBytes < 4);
+ *description_len = numBytes;
+ return length;
+}
+
+/*
+ * Search for the position and the length of the decoder configuration.
+ *
+ * \param buf Buffer to seach.
+ * \param buflen Length of \a buf.
+ * \param skip Upon succesful return, this contains the offset in \a buf where
+ * the decoder config starts.
+ * \param decoder_length Result pointer that is filled in with the length of
+ * the decoder configuration on success.
+ *
+ * \return Standard.
+ */
+static int aac_find_esds(char *buf, size_t buflen, size_t *skip,
+ unsigned long *decoder_length)
+{
+ size_t i;
+
+ for (i = 0; i + 4 < buflen; i++) {
+ char *p = buf + i;
+ int description_len;
+
+ if (p[0] != 'e' || p[1] != 's' || p[2] != 'd' || p[3] != 's')
+ continue;
+ i += 8;
+ p = buf + i;
+ PARA_INFO_LOG("found esds@%zu, next: %x\n", i, *p);
+ if (*p == 3)
+ i += 8;
+ else
+ i += 6;
+ p = buf + i;
+ PARA_INFO_LOG("next: %x\n", *p);
+ if (*p != 4)
+ continue;
+ i += 18;
+ p = buf + i;
+ PARA_INFO_LOG("next: %x\n", *p);
+ if (*p != 5)
+ continue;
+ i++;
+ p = buf + i;
+ *decoder_length = aac_read_decoder_length(p, &description_len);
+ PARA_INFO_LOG("decoder length: %lu\n", *decoder_length);
+ i += description_len;
+ *skip = i;
+ return 1;
+ }
+ return -E_ESDS;
+}
+
+/*
+ * Search for the first entry in the stco table.
+ *
+ * \param buf Buffer to seach.
+ * \param buflen Length of \a buf.
+ * \param skip Upon succesful return, this contains the number
+ * of bytes to skip from the input buffer.
+ *
+ * \return The position of the first entry in the table on success,
+ * -E_STCO on errors.
+ */
+static ssize_t aac_find_entry_point(char *buf, size_t buflen, size_t *skip)
+{
+ ssize_t ret;
+ size_t i;
+
+ for (i = 0; i + 20 < buflen; i++) {
+ char *p = buf + i;
+
+ if (p[0] != 's' || p[1] != 't' || p[2] != 'c' || p[3] != 'o')
+ continue;
+ PARA_INFO_LOG("found stco@%zu\n", i);
+ i += 12;
+ ret = read_u32_be(buf + i); /* first offset */
+ i += 4;
+ PARA_INFO_LOG("entry point: %zd\n", ret);
+ *skip = i;
+ return ret;
+ }
+ PARA_WARNING_LOG("stco not found, buflen: %zu\n", buflen);
+ return -E_STCO;
+}
+
static int aacdec_execute(struct btr_node *btrn, const char *cmd, char **result)
{
struct filter_node *fn = btr_context(btrn);
fn->private_data = NULL;
}
-static void aacdec_post_select(__a_unused struct sched *s, struct task *t)
+static int aacdec_post_select(__a_unused struct sched *s, void *context)
{
- struct filter_node *fn = container_of(t, struct filter_node, task);
+ struct filter_node *fn = context;
struct btr_node *btrn = fn->btrn;
struct private_aacdec_data *padd = fn->private_data;
int i, ret;
- unsigned char *p, *inbuf, *outbuffer;
+ char *p, *inbuf, *outbuffer;
char *btr_buf;
size_t len, skip, consumed, loaded;
next_buffer:
- t->error = 0;
ret = btr_node_status(btrn, fn->min_iqs, BTR_NT_INTERNAL);
if (ret < 0)
goto err;
if (ret == 0)
- return;
+ return 0;
btr_merge(btrn, fn->min_iqs);
- len = btr_next_buffer(btrn, (char **)&inbuf);
+ len = btr_next_buffer(btrn, &inbuf);
len = PARA_MIN(len, (size_t)8192);
consumed = 0;
if (!padd->initialized) {
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,
+ ret = NeAACDecInit(padd->handle, (unsigned char *)inbuf,
len, &rate, &channels);
PARA_INFO_LOG("decoder init: %d\n", ret);
if (ret < 0) {
consumed += skip;
p = inbuf + consumed;
ret = -E_AACDEC_INIT;
- if (NeAACDecInit2(padd->handle, p,
+ if (NeAACDecInit2(padd->handle, (unsigned char *)p,
padd->decoder_length, &rate,
&channels) != 0)
goto out;
}
padd->sample_rate = rate;
padd->channels = channels;
- PARA_INFO_LOG("rate: %u, channels: %d\n",
+ PARA_INFO_LOG("rate: %u, channels: %u\n",
padd->sample_rate, padd->channels);
padd->initialized = 1;
}
if (padd->consumed_total < padd->entry)
consumed = padd->entry - padd->consumed_total;
}
- for (; consumed < len; consumed++)
- if ((inbuf[consumed] & 0xfe) == 0x20)
- break;
if (consumed >= len)
goto success;
p = inbuf + consumed;
//PARA_CRIT_LOG("consumed: %zu (%zu + %zu), have: %zu\n", padd->consumed_total + consumed,
// padd->consumed_total, consumed, len - consumed);
- outbuffer = NeAACDecDecode(padd->handle, &padd->frame_info, p,
- len - consumed);
+ outbuffer = NeAACDecDecode(padd->handle, &padd->frame_info,
+ (unsigned char *)p, len - consumed);
if (padd->frame_info.error) {
int err = padd->frame_info.error;
ret = -E_AAC_DECODE;
goto success;
}
PARA_ERROR_LOG("%s\n", NeAACDecGetErrorMessage(err));
- PARA_ERROR_LOG("consumed: %zu + %zd + %lu\n",
+ PARA_ERROR_LOG("consumed: %zu + %zu + %lu\n",
padd->consumed_total, consumed,
padd->frame_info.bytesconsumed);
if (consumed < len)
}
err:
assert(ret < 0);
- t->error = ret;
btr_remove_node(&fn->btrn);
+ return ret;
}
/**
projects / paraslash.git / blobdiff