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, 24 insertions, 18 deletions

diff --git a/audio/decode/ad_lavc.c b/audio/decode/ad_lavc.c
index afff84ef00..443cfdad54 100644
--- a/audio/decode/ad_lavc.c
+++ b/audio/decode/ad_lavc.c
@@ -96,25 +96,30 @@ static const struct pcm_map tag_map[] = {
 
 // For demux_rawaudio.c; needed because ffmpeg doesn't have these sample
 // formats natively.
-static const struct pcm_map af_map[] = {
+static const struct pcm_map af_map_le[] = {
     {AF_FORMAT_U8,              {"pcm_u8"}},
     {AF_FORMAT_S8,              {"pcm_u8"}},
-    {AF_FORMAT_U16_LE,          {"pcm_u16le"}},
-    {AF_FORMAT_U16_BE,          {"pcm_u16be"}},
-    {AF_FORMAT_S16_LE,          {"pcm_s16le"}},
-    {AF_FORMAT_S16_BE,          {"pcm_s16be"}},
-    {AF_FORMAT_U24_LE,          {"pcm_u24le"}},
-    {AF_FORMAT_U24_BE,          {"pcm_u24be"}},
-    {AF_FORMAT_S24_LE,          {"pcm_s24le"}},
-    {AF_FORMAT_S24_BE,          {"pcm_s24be"}},
-    {AF_FORMAT_U32_LE,          {"pcm_u32le"}},
-    {AF_FORMAT_U32_BE,          {"pcm_u32be"}},
-    {AF_FORMAT_S32_LE,          {"pcm_s32le"}},
-    {AF_FORMAT_S32_BE,          {"pcm_s32be"}},
-    {AF_FORMAT_FLOAT_LE,        {"pcm_f32le"}},
-    {AF_FORMAT_FLOAT_BE,        {"pcm_f32be"}},
-    {AF_FORMAT_DOUBLE_LE,       {"pcm_f64le"}},
-    {AF_FORMAT_DOUBLE_BE,       {"pcm_f64be"}},
+    {AF_FORMAT_U16,             {"pcm_u16le"}},
+    {AF_FORMAT_S16,             {"pcm_s16le"}},
+    {AF_FORMAT_U24,             {"pcm_u24le"}},
+    {AF_FORMAT_S24,             {"pcm_s24le"}},
+    {AF_FORMAT_U32,             {"pcm_u32le"}},
+    {AF_FORMAT_S32,             {"pcm_s32le"}},
+    {AF_FORMAT_FLOAT,           {"pcm_f32le"}},
+    {AF_FORMAT_DOUBLE,          {"pcm_f64le"}},
+    {-1},
+};
+static const struct pcm_map af_map_be[] = {
+    {AF_FORMAT_U8,              {"pcm_u8"}},
+    {AF_FORMAT_S8,              {"pcm_u8"}},
+    {AF_FORMAT_U16,             {"pcm_u16be"}},
+    {AF_FORMAT_S16,             {"pcm_s16be"}},
+    {AF_FORMAT_U24,             {"pcm_u24be"}},
+    {AF_FORMAT_S24,             {"pcm_s24be"}},
+    {AF_FORMAT_U32,             {"pcm_u32be"}},
+    {AF_FORMAT_S32,             {"pcm_s32be"}},
+    {AF_FORMAT_FLOAT,           {"pcm_f32be"}},
+    {AF_FORMAT_DOUBLE,          {"pcm_f64be"}},
     {-1},
 };
 
@@ -198,7 +203,8 @@ static int init(struct dec_audio *da, const char *decoder)
         decoder = find_pcm_decoder(tag_map, sh->format,
                                    sh_audio->wf->wBitsPerSample);
     } else if (sh_audio->wf && strcmp(decoder, "mp-pcm") == 0) {
-        decoder = find_pcm_decoder(af_map, sh->format, 0);
+        const struct pcm_map *map = sh_audio->big_endian ? af_map_be : af_map_le;
+        decoder = find_pcm_decoder(map, sh->format, 0);
         ctx->force_channel_map = true;
     }