[vlc-commits] dca: drop reverse-stereo support

[Thomas Guillem]

vlc | branch: master | Thomas Guillem <thomas at gllm.fr> | Thu Jul 13 14:19:26 2017 +0200| [21f6076178e3c30f4626afad8bdba525dd785619] | committer: Thomas Guillem

dca: drop reverse-stereo support

This code path was never used since the AOUT_CHAN_REVERSESTEREO flag is never
set from the input or from this codec.

> http://git.videolan.org/gitweb.cgi/vlc.git/?a=commit;h=21f6076178e3c30f4626afad8bdba525dd785619
---

 modules/codec/a52.c | 30 ------------------------------
 1 file changed, 30 deletions(-)

diff --git a/modules/codec/a52.c b/modules/codec/a52.c
index af9f55996a..08292ba356 100644
--- a/modules/codec/a52.c
+++ b/modules/codec/a52.c
@@ -130,30 +130,6 @@ static void Duplicate( sample_t *restrict p_out, const sample_t *restrict p_in )
     }
 }
 
-/*
- * Helper function to exchange left & right channels
- */
-static void Exchange( sample_t *restrict p_out, const sample_t *restrict p_in )
-{
-    const sample_t *p_first = p_in + 256;
-    const sample_t *p_second = p_in;
-
-    for( unsigned i = 0; i < 256; i++ )
-    {
-#ifdef LIBA52_FIXED
-        uint32_t spl[2];
-
-        spl[0] = ((uint32_t)*p_first++) << 4;
-        spl[1] = ((uint32_t)*p_second++) << 4;
-        memcpy( p_out, spl, sizeof(spl) );
-        p_out += 2;
-#else
-        *p_out++ = *p_first++;
-        *p_out++ = *p_second++;
-#endif
-    }
-}
-
 static int Decode( decoder_t *p_dec, block_t *p_in_buf )
 {
     decoder_sys_t *p_sys = p_dec->p_sys;
@@ -215,12 +191,6 @@ static int Decode( decoder_t *p_dec, block_t *p_in_buf )
             Duplicate( (sample_t *)(p_out_buf->p_buffer + i * i_bytes_per_block),
                        p_samples );
         }
-        else if ( p_dec->fmt_out.audio.i_original_channels
-                    & AOUT_CHAN_REVERSESTEREO )
-        {
-            Exchange( (sample_t *)(p_out_buf->p_buffer + i * i_bytes_per_block),
-                      p_samples );
-        }
         else
         {
             /* Interleave the *$£%ù samples. */