ref: 336d6cabd617079710432094c53e075b6e67f53d
parent: b288de8383dbf2f6ed278ceb1bfe80bff8b92129
author: gcp <gcp>
date: Thu Sep 2 10:02:02 EDT 2004
Bugfixes for PS AAC streaming
--- a/libfaad/sbr_syntax.c
+++ b/libfaad/sbr_syntax.c
@@ -22,7 +22,7 @@
** Commercial non-GPL licensing of this software is possible.
** For more info contact Ahead Software through Mpeg4AAClicense@nero.com.
**
-** $Id: sbr_syntax.c,v 1.32 2004/07/31 15:48:57 menno Exp $
+** $Id: sbr_syntax.c,v 1.34 2004/09/04 14:56:28 menno Exp $
**/
#include "common.h"
@@ -391,6 +391,9 @@
if (sbr->bs_extended_data)
{uint16_t nr_bits_left;
+#if (defined(PS_DEC) || defined(DRM_PS))
+ uint8_t ps_ext_read = 0;
+#endif
uint16_t cnt = (uint16_t)faad_getbits(ld, 4
DEBUGVAR(1,225,"sbr_single_channel_element(): bs_extension_size"));
if (cnt == 15)
@@ -407,6 +410,32 @@
sbr->bs_extension_id = (uint8_t)faad_getbits(ld, 2
DEBUGVAR(1,227,"sbr_single_channel_element(): bs_extension_id"));
tmp_nr_bits += 2;
+
+ /* allow only 1 PS extension element per extension data */
+#if (defined(PS_DEC) || defined(DRM_PS))
+#if (defined(PS_DEC) && defined(DRM_PS))
+ if (sbr->bs_extension_id == EXTENSION_ID_PS || sbr->bs_extension_id == DRM_PARAMETRIC_STEREO)
+#else
+#ifdef PS_DEC
+ if (sbr->bs_extension_id == EXTENSION_ID_PS)
+#else
+#ifdef DRM_PS
+ if (sbr->bs_extension_id == DRM_PARAMETRIC_STEREO)
+#endif
+#endif
+#endif
+ {+ if (ps_ext_read == 0)
+ {+ ps_ext_read = 1;
+ } else {+ /* to be safe make it 3, will switch to "default"
+ * in sbr_extension() */
+ sbr->bs_extension_id = 3;
+ }
+ }
+#endif
+
tmp_nr_bits += sbr_extension(ld, sbr, sbr->bs_extension_id, nr_bits_left);
/* check if the data read is bigger than the number of available bits */
@@ -787,16 +816,28 @@
static uint16_t sbr_extension(bitfile *ld, sbr_info *sbr,
uint8_t bs_extension_id, uint16_t num_bits_left)
{+#ifdef PS_DEC
+ uint8_t header;
+ uint16_t ret;
+#endif
+
switch (bs_extension_id)
{#ifdef PS_DEC
case EXTENSION_ID_PS:
- sbr->ps_used = 1;
if (!sbr->ps)
{sbr->ps = ps_init(get_sr_index(sbr->sample_rate));
}
- return ps_data(sbr->ps, ld);
+ ret = ps_data(sbr->ps, ld, &header);
+
+ /* enable PS if and only if: a header has been decoded */
+ if (sbr->ps_used == 0 && header == 1)
+ {+ sbr->ps_used = 1;
+ }
+
+ return ret;
#endif
#ifdef DRM_PS
case DRM_PARAMETRIC_STEREO:
--- a/libfaad/specrec.c
+++ b/libfaad/specrec.c
@@ -22,7 +22,7 @@
** Commercial non-GPL licensing of this software is possible.
** For more info contact Ahead Software through Mpeg4AAClicense@nero.com.
**
-** $Id: specrec.c,v 1.52 2004/07/31 15:48:57 menno Exp $
+** $Id: specrec.c,v 1.54 2004/09/04 14:56:28 menno Exp $
**/
/*
@@ -849,18 +849,9 @@
#endif
- /* determine whether some mono->stereo tool is used */
-#if (defined(PS_DEC) || defined(DRM_PS))
- output_channels = hDecoder->ps_used[hDecoder->fr_ch_ele] ? 2 : 1;
-#else
- output_channels = 1;
-#endif
-#ifdef DRM_PS
- /* for DRM error recovery is crucial */
- /* simply always allocate 2 channels, you never know when PS will pop up */
- if (hDecoder->object_type == DRM_ER_LC)
- output_channels = 2;
-#endif
+ /* always allocate 2 channels, PS can always "suddenly" turn up */
+ output_channels = 2;
+
if (hDecoder->element_output_channels[hDecoder->fr_ch_ele] == 0)
{/* element_output_channels not set yet */
@@ -1025,10 +1016,8 @@
}
#endif
-#ifdef DRM_PS
- /* copy L to R for DRM when no PS is used */
- if ((hDecoder->object_type == DRM_ER_LC) &&
- (hDecoder->ps_used[hDecoder->fr_ch_ele] == 0))
+ /* copy L to R when no PS is used */
+ if ((hDecoder->ps_used[hDecoder->fr_ch_ele] == 0))
{uint8_t ele = hDecoder->fr_ch_ele;
uint8_t ch = sce->channel;
@@ -1037,7 +1026,6 @@
memcpy(hDecoder->time_out[ch+1], hDecoder->time_out[ch], frame_size);
}
-#endif
return 0;
}