audio: drop swapped-endian audio formats

Until now, the audio chain could handle both little endian and big
endian formats. This actually doesn't make much sense, since the audio
API and the HW will most likely prefer native formats. Or at the very
least, it should be trivial for audio drivers to do the byte swapping
themselves.

From now on, the audio chain contains native-endian formats only. All
AOs and some filters are adjusted. af_convertsignendian.c is now wrongly
named, but the filter name is adjusted. In some cases, the audio
infrastructure was reused on the demuxer side, but that is relatively
easy to rectify.

This is a quite intrusive and radical change. It's possible that it will
break some things (especially if they're obscure or not Linux), so watch
out for regressions. It's probably still better to do it the bulldozer
way, since slow transition and researching foreign platforms would take
a lot of time and effort.

1 files changed, 20 insertions, 33 deletions

diff --git a/audio/format.c b/audio/format.c
index b10e574a9e..60a86ea5ae 100644
--- a/audio/format.c
+++ b/audio/format.c
@@ -109,35 +109,27 @@ bool af_fmt_is_planar(int format)
     return !!(format & AF_FORMAT_PLANAR);
 }
 
-#define FMT(string, id)                                 \
-    {string,            id},
-
-#define FMT_ENDIAN(string, id)                          \
-    {string,            id},                            \
-    {string "le",       MP_CONCAT(id, _LE)},            \
-    {string "be",       MP_CONCAT(id, _BE)},            \
-
 const struct af_fmt_entry af_fmtstr_table[] = {
-    FMT("mpeg2",                AF_FORMAT_MPEG2)
-    FMT("ac3",                  AF_FORMAT_AC3)
-    FMT("iec61937",             AF_FORMAT_IEC61937)
-
-    FMT("u8",                   AF_FORMAT_U8)
-    FMT("s8",                   AF_FORMAT_S8)
-    FMT_ENDIAN("u16",           AF_FORMAT_U16)
-    FMT_ENDIAN("s16",           AF_FORMAT_S16)
-    FMT_ENDIAN("u24",           AF_FORMAT_U24)
-    FMT_ENDIAN("s24",           AF_FORMAT_S24)
-    FMT_ENDIAN("u32",           AF_FORMAT_U32)
-    FMT_ENDIAN("s32",           AF_FORMAT_S32)
-    FMT_ENDIAN("float",         AF_FORMAT_FLOAT)
-    FMT_ENDIAN("double",        AF_FORMAT_DOUBLE)
-
-    FMT("u8p",                  AF_FORMAT_U8P)
-    FMT("s16p",                 AF_FORMAT_S16P)
-    FMT("s32p",                 AF_FORMAT_S32P)
-    FMT("floatp",               AF_FORMAT_FLOATP)
-    FMT("doublep",              AF_FORMAT_DOUBLEP)
+    {"mpeg2",       AF_FORMAT_MPEG2},
+    {"ac3",         AF_FORMAT_AC3},
+    {"iec61937",    AF_FORMAT_IEC61937},
+
+    {"u8",          AF_FORMAT_U8},
+    {"s8",          AF_FORMAT_S8},
+    {"u16",         AF_FORMAT_U16},
+    {"s16",         AF_FORMAT_S16},
+    {"u24",         AF_FORMAT_U24},
+    {"s24",         AF_FORMAT_S24},
+    {"u32",         AF_FORMAT_U32},
+    {"s32",         AF_FORMAT_S32},
+    {"float",       AF_FORMAT_FLOAT},
+    {"double",      AF_FORMAT_DOUBLE},
+
+    {"u8p",         AF_FORMAT_U8P},
+    {"s16p",        AF_FORMAT_S16P},
+    {"s32p",        AF_FORMAT_S32P},
+    {"floatp",      AF_FORMAT_FLOATP},
+    {"doublep",     AF_FORMAT_DOUBLEP},
 
     {0}
 };
@@ -199,17 +191,12 @@ int af_format_conversion_score(int dst_format, int src_format)
         return INT_MIN;
     if (dst_format == src_format)
         return 1024;
-    // Just endian swapping (separate because it works for special formats)
-    if ((dst_format & ~AF_FORMAT_END_MASK) == (src_format & ~AF_FORMAT_END_MASK))
-        return 1024 - 2;
     // Can't be normally converted
     if (AF_FORMAT_IS_SPECIAL(dst_format) || AF_FORMAT_IS_SPECIAL(src_format))
         return INT_MIN;
     int score = 1024;
     if (FMT_DIFF(AF_FORMAT_INTERLEAVING_MASK, dst_format, src_format))
         score -= 1;     // has to (de-)planarize
-    if (FMT_DIFF(AF_FORMAT_END_MASK, dst_format, src_format))
-        score -= 2;     // has to swap endian
     if (FMT_DIFF(AF_FORMAT_SIGN_MASK, dst_format, src_format))
         score -= 4;     // has to swap sign
     if (FMT_DIFF(AF_FORMAT_POINT_MASK, dst_format, src_format)) {