aacdec: Try to sniff a reasonable channel layout for PCE based configurations.

This changes the output order of multichannel PCE based streams.

libavcodec/aac.h

@@ -263,9 +263,8 @@ typedef struct {
      * @name Channel element related data
      * @{
      */
-    enum ChannelPosition che_pos[4][MAX_ELEM_ID]; /**< channel element channel mapping with the
-                                                   *   first index as the first 4 raw data block types
-                                                   */
+    uint8_t layout_map[MAX_ELEM_ID*4][3];
+    int layout_map_tags;
     ChannelElement          *che[4][MAX_ELEM_ID];
     ChannelElement  *tag_che_map[4][MAX_ELEM_ID];
     int tags_mapped;

libavcodec/aacdectab.h

@@ -80,14 +80,14 @@ static const float * const tns_tmp2_map[4] = {
 
 static const int8_t tags_per_config[16] = { 0, 1, 1, 2, 3, 3, 4, 5, 0, 0, 0, 0, 0, 0, 0, 0 };
 
-static const uint8_t aac_channel_layout_map[7][5][2] = {
-    { { TYPE_SCE, 0 }, },
-    { { TYPE_CPE, 0 }, },
-    { { TYPE_CPE, 0 }, { TYPE_SCE, 0 }, },
-    { { TYPE_CPE, 0 }, { TYPE_SCE, 0 }, { TYPE_SCE, 1 }, },
-    { { TYPE_CPE, 0 }, { TYPE_SCE, 0 }, { TYPE_CPE, 1 }, },
-    { { TYPE_CPE, 0 }, { TYPE_SCE, 0 }, { TYPE_LFE, 0 }, { TYPE_CPE, 1 }, },
-    { { TYPE_CPE, 1 }, { TYPE_SCE, 0 }, { TYPE_LFE, 0 }, { TYPE_CPE, 2 }, { TYPE_CPE, 0 }, },
+static const uint8_t aac_channel_layout_map[7][5][3] = {
+    { { TYPE_SCE, 0, AAC_CHANNEL_FRONT }, },
+    { { TYPE_CPE, 0, AAC_CHANNEL_FRONT }, },
+    { { TYPE_CPE, 0, AAC_CHANNEL_FRONT }, { TYPE_SCE, 0, AAC_CHANNEL_FRONT }, },
+    { { TYPE_CPE, 0, AAC_CHANNEL_FRONT }, { TYPE_SCE, 0, AAC_CHANNEL_FRONT }, { TYPE_SCE, 1, AAC_CHANNEL_BACK }, },
+    { { TYPE_CPE, 0, AAC_CHANNEL_FRONT }, { TYPE_SCE, 0, AAC_CHANNEL_FRONT }, { TYPE_CPE, 1, AAC_CHANNEL_BACK }, },
+    { { TYPE_CPE, 0, AAC_CHANNEL_FRONT }, { TYPE_SCE, 0, AAC_CHANNEL_FRONT }, { TYPE_LFE, 0, AAC_CHANNEL_LFE  }, { TYPE_CPE, 1, AAC_CHANNEL_BACK }, },
+    { { TYPE_CPE, 1, AAC_CHANNEL_FRONT }, { TYPE_SCE, 0, AAC_CHANNEL_FRONT }, { TYPE_LFE, 0, AAC_CHANNEL_LFE  }, { TYPE_CPE, 2, AAC_CHANNEL_BACK }, { TYPE_CPE, 0, AAC_CHANNEL_FRONT }, },
 };
 
 static const uint64_t aac_channel_layout[8] = {

tests/fate/aac.mak

@@ -8,15 +8,15 @@ fate-aac-al05_44: REF = $(SAMPLES)/aac/al05_44.s16
 
 FATE_AAC += fate-aac-al06_44
 fate-aac-al06_44: CMD = pcm -i $(SAMPLES)/aac/al06_44.mp4
-fate-aac-al06_44: REF = $(SAMPLES)/aac/al06_44.s16
+fate-aac-al06_44: REF = $(SAMPLES)/aac/al06_44_reorder.s16
 
 FATE_AAC += fate-aac-al07_96
 fate-aac-al07_96: CMD = pcm -i $(SAMPLES)/aac/al07_96.mp4
-fate-aac-al07_96: REF = $(SAMPLES)/aac/al07_96.s16
+fate-aac-al07_96: REF = $(SAMPLES)/aac/al07_96_reorder.s16
 
 FATE_AAC += fate-aac-al15_44
 fate-aac-al15_44: CMD = pcm -i $(SAMPLES)/aac/al15_44.mp4
-fate-aac-al15_44: REF = $(SAMPLES)/aac/al15_44.s16
+fate-aac-al15_44: REF = $(SAMPLES)/aac/al15_44_reorder.s16
 
 FATE_AAC += fate-aac-al17_44
 fate-aac-al17_44: CMD = pcm -i $(SAMPLES)/aac/al17_44.mp4
@@ -32,7 +32,7 @@ fate-aac-am00_88: REF = $(SAMPLES)/aac/am00_88.s16
 
 FATE_AAC += fate-aac-am05_44
 fate-aac-am05_44: CMD = pcm -i $(SAMPLES)/aac/am05_44.mp4
-fate-aac-am05_44: REF = $(SAMPLES)/aac/am05_44.s16
+fate-aac-am05_44: REF = $(SAMPLES)/aac/am05_44_reorder.s16
 
 FATE_AAC += fate-aac-al_sbr_hq_cm_48_2
 fate-aac-al_sbr_hq_cm_48_2: CMD = pcm -i $(SAMPLES)/aac/al_sbr_cm_48_2.mp4
@@ -40,7 +40,7 @@ fate-aac-al_sbr_hq_cm_48_2: REF = $(SAMPLES)/aac/al_sbr_hq_cm_48_2.s16
 
 FATE_AAC += fate-aac-al_sbr_hq_cm_48_5.1
 fate-aac-al_sbr_hq_cm_48_5.1: CMD = pcm -i $(SAMPLES)/aac/al_sbr_cm_48_5.1.mp4
-fate-aac-al_sbr_hq_cm_48_5.1: REF = $(SAMPLES)/aac/al_sbr_hq_cm_48_5.1.s16
+fate-aac-al_sbr_hq_cm_48_5.1: REF = $(SAMPLES)/aac/al_sbr_hq_cm_48_5.1_reorder.s16
 
 FATE_AAC += fate-aac-al_sbr_ps_06_ur
 fate-aac-al_sbr_ps_06_ur: CMD = pcm -i $(SAMPLES)/aac/al_sbr_ps_06_new.mp4