text: /*
   * common functions for reordering audio channels
   *
   * Copyright (C) 2007 Ulion <ulion A gmail P com>
   *
   * This file is part of MPlayer.
   *
   * MPlayer is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2 of the License, or
   * (at your option) any later version.
   *
   * MPlayer is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License along
   * with MPlayer; if not, write to the Free Software Foundation, Inc.,
   * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
   */
  
  #include <stdio.h>
  #include <stdlib.h>
  #include <inttypes.h>
  #include <string.h>
  #include "libvo/fastmemcpy.h"
  
  #include "reorder_ch.h"
  
  #ifdef TEST
  #define mp_msg(mod,lev, fmt, args... )  printf( fmt, ## args )
  #else
  #include "mp_msg.h"
  #endif
  
  
  #define REORDER_COPY_5(DEST,SRC,SAMPLES,S0,S1,S2,S3,S4) \
  for (i = 0; i < SAMPLES; i += 5) {\
      DEST[i]   = SRC[i+S0];\
      DEST[i+1] = SRC[i+S1];\
      DEST[i+2] = SRC[i+S2];\
      DEST[i+3] = SRC[i+S3];\
      DEST[i+4] = SRC[i+S4];\
  }
  
  static int reorder_copy_5ch(void *dest, const void *src,
                              unsigned int samples, unsigned int samplesize,
                              int s0, int s1, int s2, int s3, int s4)
  {
      int i;
      switch (samplesize) {
      case 1:
      {
          int8_t *dest_8 = dest;
          const int8_t *src_8 = src;
          REORDER_COPY_5(dest_8,src_8,samples,s0,s1,s2,s3,s4);
          break;
      }
      case 2:
      {
          int16_t *dest_16 = dest;
          const int16_t *src_16 = src;
          REORDER_COPY_5(dest_16,src_16,samples,s0,s1,s2,s3,s4);
          break;
      }
      case 3:
      {
          int8_t *dest_8 = dest;
          const int8_t *src_8 = src;
          for (i = 0; i < samples * 3; i += 15) {
              dest_8[i]    = src_8[i+s0*3];
              dest_8[i+1]  = src_8[i+s0*3+1];
              dest_8[i+2]  = src_8[i+s0*3+2];
              dest_8[i+3]  = src_8[i+s1*3];
              dest_8[i+4]  = src_8[i+s1*3+1];
              dest_8[i+5]  = src_8[i+s1*3+2];
              dest_8[i+6]  = src_8[i+s2*3];
              dest_8[i+7]  = src_8[i+s2*3+1];
              dest_8[i+8]  = src_8[i+s2*3+2];
              dest_8[i+9]  = src_8[i+s3*3];
              dest_8[i+10] = src_8[i+s3*3+1];
              dest_8[i+11] = src_8[i+s3*3+2];
              dest_8[i+12] = src_8[i+s4*3];
              dest_8[i+13] = src_8[i+s4*3+1];
              dest_8[i+14] = src_8[i+s4*3+2];
          }
          break;
      }
      case 4:
      {
          int32_t *dest_32 = dest;
          const int32_t *src_32 = src;
          REORDER_COPY_5(dest_32,src_32,samples,s0,s1,s2,s3,s4);
          break;
      }
      case 8:
      {
          int64_t *dest_64 = dest;
          const int64_t *src_64 = src;
          REORDER_COPY_5(dest_64,src_64,samples,s0,s1,s2,s3,s4);
          break;
      }
      default:
          mp_msg(MSGT_GLOBAL, MSGL_WARN,
                 "[reorder_ch] Unsupported sample size: %d, please "
                 "report this error on the MPlayer mailing list.\n",samplesize);
          return 0;
      }
      return 1;
  }
  
  #define REORDER_COPY_6(DEST,SRC,SAMPLES,S0,S1,S2,S3,S4,S5) \
  for (i = 0; i < SAMPLES; i += 6) {\
      DEST[i]   = SRC[i+S0];\
      DEST[i+1] = SRC[i+S1];\
      DEST[i+2] = SRC[i+S2];\
      DEST[i+3] = SRC[i+S3];\
      DEST[i+4] = SRC[i+S4];\
      DEST[i+5] = SRC[i+S5];\
  }
  
  static int reorder_copy_6ch(void *dest, const void *src,
                              unsigned int samples, uint8_t samplesize,
                              int s0, int s1, int s2, int s3, int s4, int s5)
  {
      int i;
      switch (samplesize) {
      case 1:
      {
          int8_t *dest_8 = dest;
          const int8_t *src_8 = src;
          REORDER_COPY_6(dest_8,src_8,samples,s0,s1,s2,s3,s4,s5);
          break;
      }
      case 2:
      {
          int16_t *dest_16 = dest;
          const int16_t *src_16 = src;
          REORDER_COPY_6(dest_16,src_16,samples,s0,s1,s2,s3,s4,s5);
          break;
      }
      case 3:
      {
          int8_t *dest_8 = dest;
          const int8_t *src_8 = src;
          for (i = 0; i < samples * 3; i += 18) {
              dest_8[i]    = src_8[i+s0*3];
              dest_8[i+1]  = src_8[i+s0*3+1];
              dest_8[i+2]  = src_8[i+s0*3+2];
              dest_8[i+3]  = src_8[i+s1*3];
              dest_8[i+4]  = src_8[i+s1*3+1];
              dest_8[i+5]  = src_8[i+s1*3+2];
              dest_8[i+6]  = src_8[i+s2*3];
              dest_8[i+7]  = src_8[i+s2*3+1];
              dest_8[i+8]  = src_8[i+s2*3+2];
              dest_8[i+9]  = src_8[i+s3*3];
              dest_8[i+10] = src_8[i+s3*3+1];
              dest_8[i+11] = src_8[i+s3*3+2];
              dest_8[i+12] = src_8[i+s4*3];
              dest_8[i+13] = src_8[i+s4*3+1];
              dest_8[i+14] = src_8[i+s4*3+2];
              dest_8[i+15] = src_8[i+s5*3];
              dest_8[i+16] = src_8[i+s5*3+1];
              dest_8[i+17] = src_8[i+s5*3+2];
          }
          break;
      }
      case 4:
      {
          int32_t *dest_32 = dest;
          const int32_t *src_32 = src;
          REORDER_COPY_6(dest_32,src_32,samples,s0,s1,s2,s3,s4,s5);
          break;
      }
      case 8:
      {
          int64_t *dest_64 = dest;
          const int64_t *src_64 = src;
          REORDER_COPY_6(dest_64,src_64,samples,s0,s1,s2,s3,s4,s5);
          break;
      }
      default:
          mp_msg(MSGT_GLOBAL, MSGL_WARN,
                 "[reorder_ch] Unsupported sample size: %d, please "
                 "report this error on the MPlayer mailing list.\n",samplesize);
          return 0;
      }
      return 1;
  }
  
  #define REORDER_COPY_8(DEST,SRC,SAMPLES,S0,S1,S2,S3,S4,S5,S6,S7) \
  for (i = 0; i < SAMPLES; i += 8) {\
      DEST[i]   = SRC[i+S0];\
      DEST[i+1] = SRC[i+S1];\
      DEST[i+2] = SRC[i+S2];\
      DEST[i+3] = SRC[i+S3];\
      DEST[i+4] = SRC[i+S4];\
      DEST[i+5] = SRC[i+S5];\
      DEST[i+6] = SRC[i+S6];\
      DEST[i+7] = SRC[i+S7];\
  }
  
  static int reorder_copy_8ch(void *dest, const void *src,
                              unsigned int samples, uint8_t samplesize,
                              int s0, int s1, int s2, int s3,
                              int s4, int s5, int s6, int s7)
  {
      int i;
      switch (samplesize) {
      case 1:
      {
          int8_t *dest_8 = dest;
          const int8_t *src_8 = src;
          REORDER_COPY_8(dest_8,src_8,samples,s0,s1,s2,s3,s4,s5,s6,s7);
          break;
      }
      case 2:
      {
          int16_t *dest_16 = dest;
          const int16_t *src_16 = src;
          REORDER_COPY_8(dest_16,src_16,samples,s0,s1,s2,s3,s4,s5,s6,s7);
          break;
      }
      case 3:
      {
          int8_t *dest_8 = dest;
          const int8_t *src_8 = src;
          for (i = 0; i < samples * 3; i += 24) {
              dest_8[i]    = src_8[i+s0*3];
              dest_8[i+1]  = src_8[i+s0*3+1];
              dest_8[i+2]  = src_8[i+s0*3+2];
              dest_8[i+3]  = src_8[i+s1*3];
              dest_8[i+4]  = src_8[i+s1*3+1];
              dest_8[i+5]  = src_8[i+s1*3+2];
              dest_8[i+6]  = src_8[i+s2*3];
              dest_8[i+7]  = src_8[i+s2*3+1];
              dest_8[i+8]  = src_8[i+s2*3+2];
              dest_8[i+9]  = src_8[i+s3*3];
              dest_8[i+10] = src_8[i+s3*3+1];
              dest_8[i+11] = src_8[i+s3*3+2];
              dest_8[i+12] = src_8[i+s4*3];
              dest_8[i+13] = src_8[i+s4*3+1];
              dest_8[i+14] = src_8[i+s4*3+2];
              dest_8[i+15] = src_8[i+s5*3];
              dest_8[i+16] = src_8[i+s5*3+1];
              dest_8[i+17] = src_8[i+s5*3+2];
              dest_8[i+18] = src_8[i+s6*3];
              dest_8[i+19] = src_8[i+s6*3+1];
              dest_8[i+20] = src_8[i+s6*3+2];
              dest_8[i+21] = src_8[i+s7*3];
              dest_8[i+22] = src_8[i+s7*3+1];
              dest_8[i+23] = src_8[i+s7*3+2];
          }
          break;
      }
      case 4:
      {
          int32_t *dest_32 = dest;
          const int32_t *src_32 = src;
          REORDER_COPY_8(dest_32,src_32,samples,s0,s1,s2,s3,s4,s5,s6,s7);
          break;
      }
      case 8:
      {
          int64_t *dest_64 = dest;
          const int64_t *src_64 = src;
          REORDER_COPY_8(dest_64,src_64,samples,s0,s1,s2,s3,s4,s5,s6,s7);
          break;
      }
      default:
          mp_msg(MSGT_GLOBAL, MSGL_WARN,
                 "[reorder_ch] Unsupported sample size: %d, please "
                 "report this error on the MPlayer mailing list.\n",samplesize);
          return 0;
      }
      return 1;
  }
  
  void reorder_channel_copy(void *src,
                            int src_layout,
                            void *dest,
                            int dest_layout,
                            int samples,
                            int samplesize)
  {
      if (dest_layout==src_layout) {
          fast_memcpy(dest, src, samples*samplesize);
          return;
      }
      if (!AF_IS_SAME_CH_NUM(dest_layout,src_layout)) {
          mp_msg(MSGT_GLOBAL, MSGL_WARN, "[reorder_ch] different channel count "
                 "between src and dest: %x, %x\n",
                 AF_GET_CH_NUM_WITH_LFE(src_layout),
                 AF_GET_CH_NUM_WITH_LFE(dest_layout));
          return;
      }
      switch ((src_layout<<16)|dest_layout) {
      // AF_CHANNEL_LAYOUT_5_0_A   L R C Ls Rs
      // AF_CHANNEL_LAYOUT_5_0_B   L R Ls Rs C
      // AF_CHANNEL_LAYOUT_5_0_C   L C R Ls Rs
      // AF_CHANNEL_LAYOUT_5_0_D   C L R Ls Rs
      case AF_CHANNEL_LAYOUT_5_0_A << 16 | AF_CHANNEL_LAYOUT_5_0_B:
          reorder_copy_5ch(dest, src, samples, samplesize, 0, 1, 3, 4, 2);
          break;
      case AF_CHANNEL_LAYOUT_5_0_A << 16 | AF_CHANNEL_LAYOUT_5_0_C:
          reorder_copy_5ch(dest, src, samples, samplesize, 0, 2, 1, 3, 4);
          break;
      case AF_CHANNEL_LAYOUT_5_0_A << 16 | AF_CHANNEL_LAYOUT_5_0_D:
          reorder_copy_5ch(dest, src, samples, samplesize, 2, 0, 1, 3, 4);
          break;
      case AF_CHANNEL_LAYOUT_5_0_B << 16 | AF_CHANNEL_LAYOUT_5_0_A:
          reorder_copy_5ch(dest, src, samples, samplesize, 0, 1, 4, 2, 3);
          break;
      case AF_CHANNEL_LAYOUT_5_0_B << 16 | AF_CHANNEL_LAYOUT_5_0_C:
          reorder_copy_5ch(dest, src, samples, samplesize, 0, 4, 1, 2, 3);
          break;
      case AF_CHANNEL_LAYOUT_5_0_B << 16 | AF_CHANNEL_LAYOUT_5_0_D:
          reorder_copy_5ch(dest, src, samples, samplesize, 4, 0, 1, 2, 3);
          break;
      case AF_CHANNEL_LAYOUT_5_0_C << 16 | AF_CHANNEL_LAYOUT_5_0_A:
          reorder_copy_5ch(dest, src, samples, samplesize, 0, 2, 1, 3, 4);
          break;
      case AF_CHANNEL_LAYOUT_5_0_C << 16 | AF_CHANNEL_LAYOUT_5_0_B:
          reorder_copy_5ch(dest, src, samples, samplesize, 0, 2, 3, 4, 1);
          break;
      case AF_CHANNEL_LAYOUT_5_0_C << 16 | AF_CHANNEL_LAYOUT_5_0_D:
          reorder_copy_5ch(dest, src, samples, samplesize, 1, 0, 2, 3, 4);
          break;
      case AF_CHANNEL_LAYOUT_5_0_D << 16 | AF_CHANNEL_LAYOUT_5_0_A:
          reorder_copy_5ch(dest, src, samples, samplesize, 1, 2, 0, 3, 4);
          break;
      case AF_CHANNEL_LAYOUT_5_0_D << 16 | AF_CHANNEL_LAYOUT_5_0_B:
          reorder_copy_5ch(dest, src, samples, samplesize, 1, 2, 3, 4, 0);
          break;
      case AF_CHANNEL_LAYOUT_5_0_D << 16 | AF_CHANNEL_LAYOUT_5_0_C:
          reorder_copy_5ch(dest, src, samples, samplesize, 1, 0, 2, 3, 4);
          break;
      // AF_CHANNEL_LAYOUT_5_1_A   L R C LFE Ls Rs
      // AF_CHANNEL_LAYOUT_5_1_B   L R Ls Rs C LFE
      // AF_CHANNEL_LAYOUT_5_1_C   L C R Ls Rs LFE
      // AF_CHANNEL_LAYOUT_5_1_D   C L R Ls Rs LFE
      // AF_CHANNEL_LAYOUT_5_1_E   LFE L C R Ls Rs
      case AF_CHANNEL_LAYOUT_5_1_A << 16 | AF_CHANNEL_LAYOUT_5_1_B:
          reorder_copy_6ch(dest, src, samples, samplesize, 0, 1, 4, 5, 2, 3);
          break;
      case AF_CHANNEL_LAYOUT_5_1_A << 16 | AF_CHANNEL_LAYOUT_5_1_C:
          reorder_copy_6ch(dest, src, samples, samplesize, 0, 2, 1, 4, 5, 3);
          break;
      case AF_CHANNEL_LAYOUT_5_1_A << 16 | AF_CHANNEL_LAYOUT_5_1_D:
          reorder_copy_6ch(dest, src, samples, samplesize, 2, 0, 1, 4, 5, 3);
          break;
      case AF_CHANNEL_LAYOUT_5_1_B << 16 | AF_CHANNEL_LAYOUT_5_1_A:
          reorder_copy_6ch(dest, src, samples, samplesize, 0, 1, 4, 5, 2, 3);
          break;
      case AF_CHANNEL_LAYOUT_5_1_B << 16 | AF_CHANNEL_LAYOUT_5_1_C:
          reorder_copy_6ch(dest, src, samples, samplesize, 0, 4, 1, 2, 3, 5);
          break;
      case AF_CHANNEL_LAYOUT_5_1_B << 16 | AF_CHANNEL_LAYOUT_5_1_D:
          reorder_copy_6ch(dest, src, samples, samplesize, 4, 0, 1, 2, 3, 5);
          break;
      case AF_CHANNEL_LAYOUT_5_1_B << 16 | AF_CHANNEL_LAYOUT_5_1_E:
          reorder_copy_6ch(dest, src, samples, samplesize, 5, 0, 4, 1, 2, 3);
          break;
      case AF_CHANNEL_LAYOUT_5_1_C << 16 | AF_CHANNEL_LAYOUT_5_1_A:
          reorder_copy_6ch(dest, src, samples, samplesize, 0, 2, 1, 5, 3, 4);
          break;
      case AF_CHANNEL_LAYOUT_5_1_C << 16 | AF_CHANNEL_LAYOUT_5_1_B:
          reorder_copy_6ch(dest, src, samples, samplesize, 0, 2, 3, 4, 1, 5);
          break;
      case AF_CHANNEL_LAYOUT_5_1_C << 16 | AF_CHANNEL_LAYOUT_5_1_D:
          reorder_copy_6ch(dest, src, samples, samplesize, 1, 0, 2, 3, 4, 5);
          break;
      case AF_CHANNEL_LAYOUT_5_1_D << 16 | AF_CHANNEL_LAYOUT_5_1_A:
          reorder_copy_6ch(dest, src, samples, samplesize, 1, 2, 0, 5, 3, 4);
          break;
      case AF_CHANNEL_LAYOUT_5_1_D << 16 | AF_CHANNEL_LAYOUT_5_1_B:
          reorder_copy_6ch(dest, src, samples, samplesize, 1, 2, 3, 4, 0, 5);
          break;
      case AF_CHANNEL_LAYOUT_5_1_D << 16 | AF_CHANNEL_LAYOUT_5_1_C:
          reorder_copy_6ch(dest, src, samples, samplesize, 1, 0, 2, 3, 4, 5);
          break;
      case AF_CHANNEL_LAYOUT_5_1_E << 16 | AF_CHANNEL_LAYOUT_5_1_B:
          reorder_copy_6ch(dest, src, samples, samplesize, 1, 3, 4, 5, 2, 0);
          break;
      case AF_CHANNEL_LAYOUT_5_1_F << 16 | AF_CHANNEL_LAYOUT_5_1_B:
          reorder_copy_6ch(dest, src, samples, samplesize, 1, 2, 4, 5, 0, 3);
          break;
      // AF_CHANNEL_LAYOUT_7_1_A   L R C LFE Ls Rs Rls Rrs
      // AF_CHANNEL_LAYOUT_7_1_B   L R Ls Rs C LFE Rls Rrs
      // AF_CHANNEL_LAYOUT_7_1_D   C L R Ls Rs Rls Rrs LFE
      case AF_CHANNEL_LAYOUT_7_1_A << 16 | AF_CHANNEL_LAYOUT_7_1_B:
      case AF_CHANNEL_LAYOUT_7_1_B << 16 | AF_CHANNEL_LAYOUT_7_1_A:
          reorder_copy_8ch(dest, src, samples, samplesize, 0, 1, 4, 5, 2, 3, 6, 7);
          break;
      case AF_CHANNEL_LAYOUT_7_1_D << 16 | AF_CHANNEL_LAYOUT_7_1_B:
          reorder_copy_8ch(dest, src, samples, samplesize, 1, 2, 3, 4, 0, 7, 5, 6);
          break;
      default:
          mp_msg(MSGT_GLOBAL, MSGL_WARN, "[reorder_channel_copy] unsupport "
                 "from %x to %x, %d * %d\n", src_layout, dest_layout,
                 samples, samplesize);
          fast_memcpy(dest, src, samples*samplesize);
      }
  }
  
  
  #define REORDER_SELF_SWAP_2(SRC,TMP,SAMPLES,CHNUM,S0,S1) \
  for (i = 0; i < SAMPLES; i += CHNUM) {\
      TMP = SRC[i+S0];\
      SRC[i+S0] = SRC[i+S1];\
      SRC[i+S1] = TMP;\
  }
  
  static int reorder_self_2(void *src, unsigned int samples,
                            unsigned int samplesize, unsigned int chnum,
                            int s0, int s1)
  {
      int i;
      switch (samplesize) {
      case 1:
      {
          int8_t *src_8 = src;
          int8_t tmp;
          if (chnum==6) {
              REORDER_SELF_SWAP_2(src_8,tmp,samples,6,s0,s1);
          }
          else if (chnum==8) {
              REORDER_SELF_SWAP_2(src_8,tmp,samples,8,s0,s1);
          }
          else {
              REORDER_SELF_SWAP_2(src_8,tmp,samples,5,s0,s1);
          }
          break;
      }
      case 2:
      {
          int16_t *src_16 = src;
          int16_t tmp;
          if (chnum==6) {
              REORDER_SELF_SWAP_2(src_16,tmp,samples,6,s0,s1);
          }
          else if (chnum==3) {
              REORDER_SELF_SWAP_2(src_16,tmp,samples,3,s0,s1);
          }
          else if (chnum==4) {
              REORDER_SELF_SWAP_2(src_16,tmp,samples,3,s0,s1);
          }
          else {
              REORDER_SELF_SWAP_2(src_16,tmp,samples,5,s0,s1);
          }
          break;
      }
      case 3:
      {
          int8_t *src_8 = src;
          int8_t tmp0, tmp1, tmp2;
          for (i = 0; i < samples * 3; i += chnum * 3) {
              tmp0 = src_8[i+s0*3];
              tmp1 = src_8[i+s0*3+1];
              tmp2 = src_8[i+s0*3+2];
              src_8[i+s0*3]   = src_8[i+s1*3];
              src_8[i+s0*3+1] = src_8[i+s1*3+1];
              src_8[i+s0*3+2] = src_8[i+s1*3+2];
              src_8[i+s1*3]   = tmp0;
              src_8[i+s1*3+1] = tmp1;
              src_8[i+s1*3+2] = tmp2;
          }
          break;
      }
      case 4:
      {
          int32_t *src_32 = src;
          int32_t tmp;
          if (chnum==6) {
              REORDER_SELF_SWAP_2(src_32,tmp,samples,6,s0,s1);
          }
          else if (chnum==3) {
              REORDER_SELF_SWAP_2(src_32,tmp,samples,3,s0,s1);
          }
          else if (chnum==4) {
              REORDER_SELF_SWAP_2(src_32,tmp,samples,4,s0,s1);
          }
          else {
              REORDER_SELF_SWAP_2(src_32,tmp,samples,5,s0,s1);
          }
          break;
      }
      case 8:
      {
          int64_t *src_64 = src;
          int64_t tmp;
          if (chnum==6) {
              REORDER_SELF_SWAP_2(src_64,tmp,samples,6,s0,s1);
          }
          else if (chnum==3) {
              REORDER_SELF_SWAP_2(src_64,tmp,samples,3,s0,s1);
          }
          else if (chnum==4) {
              REORDER_SELF_SWAP_2(src_64,tmp,samples,4,s0,s1);
          }
          else {
              REORDER_SELF_SWAP_2(src_64,tmp,samples,5,s0,s1);
          }
          break;
      }
      default:
          mp_msg(MSGT_GLOBAL, MSGL_WARN,
                 "[reorder_ch] Unsupported sample size: %d, please "
                 "report this error on the MPlayer mailing list.\n",samplesize);
          return 0;
      }
      return 1;
  }
  
  #define REORDER_SELF_SWAP_3(SRC,TMP,SAMPLES,CHNUM,S0,S1,S2) \
  for (i = 0; i < SAMPLES; i += CHNUM) {\
      TMP = SRC[i+S0];\
      SRC[i+S0] = SRC[i+S1];\
      SRC[i+S1] = SRC[i+S2];\
      SRC[i+S2] = TMP;\
  }
  
  static int reorder_self_3(void *src, unsigned int samples,
                            unsigned int samplesize, unsigned int chnum,
                            int s0, int s1, int s2)
  {
      int i;
      switch (samplesize) {
      case 1:
      {
          int8_t *src_8 = src;
          int8_t tmp;
          if (chnum==6) {
              REORDER_SELF_SWAP_3(src_8,tmp,samples,6,s0,s1,s2);
          }
          else {
              REORDER_SELF_SWAP_3(src_8,tmp,samples,5,s0,s1,s2);
          }
          break;
      }
      case 2:
      {
          int16_t *src_16 = src;
          int16_t tmp;
          if (chnum==6) {
              REORDER_SELF_SWAP_3(src_16,tmp,samples,6,s0,s1,s2);
          }
          else {
              REORDER_SELF_SWAP_3(src_16,tmp,samples,5,s0,s1,s2);
          }
          break;
      }
      case 3:
      {
          int8_t *src_8 = src;
          int8_t tmp0, tmp1, tmp2;
          for (i = 0; i < samples * 3; i += chnum * 3) {
              tmp0 = src_8[i+s0*3];
              tmp1 = src_8[i+s0*3+1];
              tmp2 = src_8[i+s0*3+2];
              src_8[i+s0*3]   = src_8[i+s1*3];
              src_8[i+s0*3+1] = src_8[i+s1*3+1];
              src_8[i+s0*3+2] = src_8[i+s1*3+2];
              src_8[i+s1*3]   = src_8[i+s2*3];
              src_8[i+s1*3+1] = src_8[i+s2*3+1];
              src_8[i+s1*3+2] = src_8[i+s2*3+2];
              src_8[i+s2*3]   = tmp0;
              src_8[i+s2*3+1] = tmp1;
              src_8[i+s2*3+2] = tmp2;
          }
          break;
      }
      case 4:
      {
          int32_t *src_32 = src;
          int32_t tmp;
          if (chnum==6) {
              REORDER_SELF_SWAP_3(src_32,tmp,samples,6,s0,s1,s2);
          }
          else {
              REORDER_SELF_SWAP_3(src_32,tmp,samples,5,s0,s1,s2);
          }
          break;
      }
      case 8:
      {
          int64_t *src_64 = src;
          int64_t tmp;
          if (chnum==6) {
              REORDER_SELF_SWAP_3(src_64,tmp,samples,6,s0,s1,s2);
          }
          else {
              REORDER_SELF_SWAP_3(src_64,tmp,samples,5,s0,s1,s2);
          }
          break;
      }
      default:
          mp_msg(MSGT_GLOBAL, MSGL_WARN,
                 "[reorder_ch] Unsupported sample size: %d, please "
                 "report this error on the MPlayer mailing list.\n",samplesize);
          return 0;
      }
      return 1;
  }
  
  #define REORDER_SELF_SWAP_4_STEP_1(SRC,TMP,SAMPLES,CHNUM,S0,S1,S2,S3) \
  for (i = 0; i < SAMPLES; i += CHNUM) {\
      TMP = SRC[i+S0];\
      SRC[i+S0] = SRC[i+S1];\
      SRC[i+S1] = SRC[i+S2];\
      SRC[i+S2] = SRC[i+S3];\
      SRC[i+S3] = TMP;\
  }
  
  static int reorder_self_4_step_1(void *src, unsigned int samples,
                                   unsigned int samplesize, unsigned int chnum,
                                   int s0, int s1, int s2, int s3)
  {
      int i;
      switch (samplesize) {
      case 1:
      {
          int8_t *src_8 = src;
          int8_t tmp;
          if (chnum==6) {
              REORDER_SELF_SWAP_4_STEP_1(src_8,tmp,samples,6,s0,s1,s2,s3);
          }
          else if (chnum==8) {
              REORDER_SELF_SWAP_4_STEP_1(src_8,tmp,samples,8,s0,s1,s2,s3);
          }
          else {
              REORDER_SELF_SWAP_4_STEP_1(src_8,tmp,samples,5,s0,s1,s2,s3);
          }
          break;
      }
      case 2:
      {
          int16_t *src_16 = src;
          int16_t tmp;
          if (chnum==6) {
              REORDER_SELF_SWAP_4_STEP_1(src_16,tmp,samples,6,s0,s1,s2,s3);
          }
          else if (chnum==8) {
              REORDER_SELF_SWAP_4_STEP_1(src_16,tmp,samples,8,s0,s1,s2,s3);
          }
          else {
              REORDER_SELF_SWAP_4_STEP_1(src_16,tmp,samples,5,s0,s1,s2,s3);
          }
          break;
      }
      case 3:
      {
          int8_t *src_8 = src;
          int8_t tmp0, tmp1, tmp2;
          for (i = 0; i < samples * 3; i += chnum * 3) {
              tmp0 = src_8[i+s0*3];
              tmp1 = src_8[i+s0*3+1];
              tmp2 = src_8[i+s0*3+2];
              src_8[i+s0*3]   = src_8[i+s1*3];
              src_8[i+s0*3+1] = src_8[i+s1*3+1];
              src_8[i+s0*3+2] = src_8[i+s1*3+2];
              src_8[i+s1*3]   = src_8[i+s2*3];
              src_8[i+s1*3+1] = src_8[i+s2*3+1];
              src_8[i+s1*3+2] = src_8[i+s2*3+2];
              src_8[i+s2*3]   = src_8[i+s3*3];
              src_8[i+s2*3+1] = src_8[i+s3*3+1];
              src_8[i+s2*3+2] = src_8[i+s3*3+2];
              src_8[i+s3*3]   = tmp0;
              src_8[i+s3*3+1] = tmp1;
              src_8[i+s3*3+2] = tmp2;
          }
          break;
      }
      case 4:
      {
          int32_t *src_32 = src;
          int32_t tmp;
          if (chnum==6) {
              REORDER_SELF_SWAP_4_STEP_1(src_32,tmp,samples,6,s0,s1,s2,s3);
          }
          else if (chnum==8) {
              REORDER_SELF_SWAP_4_STEP_1(src_32,tmp,samples,8,s0,s1,s2,s3);
          }
          else {
              REORDER_SELF_SWAP_4_STEP_1(src_32,tmp,samples,5,s0,s1,s2,s3);
          }
          break;
      }
      case 8:
      {
          int64_t *src_64 = src;
          int64_t tmp;
          if (chnum==6) {
              REORDER_SELF_SWAP_4_STEP_1(src_64,tmp,samples,6,s0,s1,s2,s3);
          }
          else if (chnum==8) {
              REORDER_SELF_SWAP_4_STEP_1(src_64,tmp,samples,8,s0,s1,s2,s3);
          }
          else {
              REORDER_SELF_SWAP_4_STEP_1(src_64,tmp,samples,5,s0,s1,s2,s3);
          }
          break;
      }
      default:
          mp_msg(MSGT_GLOBAL, MSGL_WARN,
                 "[reorder_ch] Unsupported sample size: %d, please "
                 "report this error on the MPlayer mailing list.\n",samplesize);
          return 0;
      }
      return 1;
  }
  
  #define REORDER_SELF_SWAP_4_STEP_2(SRC,TMP,SAMPLES,CHNUM,S0,S1,S2,S3) \
  for (i = 0; i < SAMPLES; i += CHNUM) {\
      TMP = SRC[i+S0];\
      SRC[i+S0] = SRC[i+S2];\
      SRC[i+S2] = TMP;\
      TMP = SRC[i+S1];\
      SRC[i+S1] = SRC[i+S3];\
      SRC[i+S3] = TMP;\
  }
  
  static int reorder_self_4_step_2(void *src, unsigned int samples,
                                   unsigned int samplesize, unsigned int chnum,
                                   int s0, int s1, int s2, int s3)
  {
      int i;
      switch (samplesize) {
      case 3:
      {
          int8_t *src_8 = src;
          int8_t tmp0, tmp1, tmp2;
          for (i = 0; i < samples * 3; i += chnum * 3) {
              tmp0 = src_8[i+s0*3];
              tmp1 = src_8[i+s0*3+1];
              tmp2 = src_8[i+s0*3+2];
              src_8[i+s0*3]   = src_8[i+s2*3];
              src_8[i+s0*3+1] = src_8[i+s2*3+1];
              src_8[i+s0*3+2] = src_8[i+s2*3+2];
              src_8[i+s2*3]   = tmp0;
              src_8[i+s2*3+1] = tmp1;
              src_8[i+s2*3+2] = tmp2;
              tmp0 = src_8[i+s1*3];
              tmp1 = src_8[i+s1*3+1];
              tmp2 = src_8[i+s1*3+2];
              src_8[i+s1*3]   = src_8[i+s3*3];
              src_8[i+s1*3+1] = src_8[i+s3*3+1];
              src_8[i+s1*3+2] = src_8[i+s3*3+2];
              src_8[i+s3*3]   = tmp0;
              src_8[i+s3*3+1] = tmp1;
              src_8[i+s3*3+2] = tmp2;
          }
          break;
      }
      default:
          mp_msg(MSGT_GLOBAL, MSGL_WARN,
                 "[reorder_ch] Unsupported sample size: %d, please "
                 "report this error on the MPlayer mailing list.\n",samplesize);
          return 0;
      }
      return 1;
  }
  
  #define REORDER_SELF_SWAP_5_STEP_1(SRC,TMP,SAMPLES,CHNUM,S0,S1,S2,S3,S4) \
  for (i = 0; i < SAMPLES; i += CHNUM) {\
      TMP = SRC[i+S0];\
      SRC[i+S0] = SRC[i+S1];\
      SRC[i+S1] = SRC[i+S2];\
      SRC[i+S2] = SRC[i+S3];\
      SRC[i+S3] = SRC[i+S4];\
      SRC[i+S4] = TMP;\
  }
  
  static int reorder_self_5_step_1(void *src, unsigned int samples,
                                   unsigned int samplesize, unsigned int chnum,
                                   int s0, int s1, int s2, int s3, int s4)
  {
      int i;
      switch (samplesize) {
      case 1:
      {
          int8_t *src_8 = src;
          int8_t tmp;
          if (chnum==6) {
              REORDER_SELF_SWAP_5_STEP_1(src_8,tmp,samples,6,s0,s1,s2,s3,s4);
          }
          else if (chnum==8) {
              REORDER_SELF_SWAP_5_STEP_1(src_8,tmp,samples,8,s0,s1,s2,s3,s4);
          }
          else {
              REORDER_SELF_SWAP_5_STEP_1(src_8,tmp,samples,5,s0,s1,s2,s3,s4);
          }
          break;
      }
      case 2:
      {
          int16_t *src_16 = src;
          int16_t tmp;
          if (chnum==6) {
              REORDER_SELF_SWAP_5_STEP_1(src_16,tmp,samples,6,s0,s1,s2,s3,s4);
          }
          else if (chnum==8) {
              REORDER_SELF_SWAP_5_STEP_1(src_16,tmp,samples,8,s0,s1,s2,s3,s4);
          }
          else {
              REORDER_SELF_SWAP_5_STEP_1(src_16,tmp,samples,5,s0,s1,s2,s3,s4);
          }
          break;
      }
      case 3:
      {
          int8_t *src_8 = src;
          int8_t tmp0, tmp1, tmp2;
          for (i = 0; i < samples * 3; i += chnum * 3) {
              tmp0 = src_8[i+s0*3];
              tmp1 = src_8[i+s0*3+1];
              tmp2 = src_8[i+s0*3+2];
              src_8[i+s0*3]   = src_8[i+s1*3];
              src_8[i+s0*3+1] = src_8[i+s1*3+1];
              src_8[i+s0*3+2] = src_8[i+s1*3+2];
              src_8[i+s1*3]   = src_8[i+s2*3];
              src_8[i+s1*3+1] = src_8[i+s2*3+1];
              src_8[i+s1*3+2] = src_8[i+s2*3+2];
              src_8[i+s2*3]   = src_8[i+s3*3];
              src_8[i+s2*3+1] = src_8[i+s3*3+1];
              src_8[i+s2*3+2] = src_8[i+s3*3+2];
              src_8[i+s3*3]   = src_8[i+s4*3];
              src_8[i+s3*3+1] = src_8[i+s4*3+1];
              src_8[i+s3*3+2] = src_8[i+s4*3+2];
              src_8[i+s4*3]   = tmp0;
              src_8[i+s4*3+1] = tmp1;
              src_8[i+s4*3+2] = tmp2;
          }
          break;
      }
      case 4:
      {
          int32_t *src_32 = src;
          int32_t tmp;
          if (chnum==6) {
              REORDER_SELF_SWAP_5_STEP_1(src_32,tmp,samples,6,s0,s1,s2,s3,s4);
          }
          else if (chnum==8) {
              REORDER_SELF_SWAP_5_STEP_1(src_32,tmp,samples,8,s0,s1,s2,s3,s4);
          }
          else {
              REORDER_SELF_SWAP_5_STEP_1(src_32,tmp,samples,5,s0,s1,s2,s3,s4);
          }
          break;
      }
      case 8:
      {
          int64_t *src_64 = src;
          int64_t tmp;
          if (chnum==6) {
              REORDER_SELF_SWAP_5_STEP_1(src_64,tmp,samples,6,s0,s1,s2,s3,s4);
          }
          else if (chnum==8) {
              REORDER_SELF_SWAP_5_STEP_1(src_64,tmp,samples,8,s0,s1,s2,s3,s4);
          }
          else {
              REORDER_SELF_SWAP_5_STEP_1(src_64,tmp,samples,5,s0,s1,s2,s3,s4);
          }
          break;
      }
      default:
          mp_msg(MSGT_GLOBAL, MSGL_WARN,
                 "[reorder_ch] Unsupported sample size: %d, please "
                 "report this error on the MPlayer mailing list.\n",samplesize);
          return 0;
      }
      return 1;
  }
  
  #define REORDER_SELF_SWAP_2_3(SRC,TMP,SAMPLES,CHNUM,S0,S1,S2,S3,S4) \
  for (i = 0; i < SAMPLES; i += CHNUM) {\
      TMP = SRC[i+S0];\
      SRC[i+S0] = SRC[i+S1];\
      SRC[i+S1] = TMP;\
      TMP = SRC[i+S2];\
      SRC[i+S2] = SRC[i+S3];\
      SRC[i+S3] = SRC[i+S4];\
      SRC[i+S4] = TMP;\
  }
  
  static int reorder_self_2_3(void *src, unsigned int samples,
                              unsigned int samplesize,
                              int s0, int s1, int s2, int s3, int s4)
  {
      int i;
      switch (samplesize) {
      case 1:
      {
          int8_t *src_8 = src;
          int8_t tmp;
          REORDER_SELF_SWAP_2_3(src_8,tmp,samples,6,s0,s1,s2,s3,s4);
          break;
      }
      case 2:
      {
          int16_t *src_16 = src;
          int16_t tmp;
          REORDER_SELF_SWAP_2_3(src_16,tmp,samples,6,s0,s1,s2,s3,s4);
          break;
      }
      case 3:
      {
          int8_t *src_8 = src;
          int8_t tmp0, tmp1, tmp2;
          for (i = 0; i < samples * 3; i += 18) {
              tmp0 = src_8[i+s0*3];
              tmp1 = src_8[i+s0*3+1];
              tmp2 = src_8[i+s0*3+2];
              src_8[i+s0*3]   = src_8[i+s1*3];
              src_8[i+s0*3+1] = src_8[i+s1*3+1];
              src_8[i+s0*3+2] = src_8[i+s1*3+2];
              src_8[i+s1*3]   = tmp0;
              src_8[i+s1*3+1] = tmp1;
              src_8[i+s1*3+2] = tmp2;
              tmp0 = src_8[i+s2*3];
              tmp1 = src_8[i+s2*3+1];
              tmp2 = src_8[i+s2*3+2];
              src_8[i+s2*3]   = src_8[i+s3*3];
              src_8[i+s2*3+1] = src_8[i+s3*3+1];
              src_8[i+s2*3+2] = src_8[i+s3*3+2];
              src_8[i+s3*3]   = src_8[i+s4*3];
              src_8[i+s3*3+1] = src_8[i+s4*3+1];
              src_8[i+s3*3+2] = src_8[i+s4*3+2];
              src_8[i+s4*3]   = tmp0;
              src_8[i+s4*3+1] = tmp1;
              src_8[i+s4*3+2] = tmp2;
          }
          break;
      }
      case 4:
      {
          int32_t *src_32 = src;
          int32_t tmp;
          REORDER_SELF_SWAP_2_3(src_32,tmp,samples,6,s0,s1,s2,s3,s4);
          break;
      }
      case 8:
      {
          int64_t *src_64 = src;
          int64_t tmp;
          REORDER_SELF_SWAP_2_3(src_64,tmp,samples,6,s0,s1,s2,s3,s4);
          break;
      }
      default:
          mp_msg(MSGT_GLOBAL, MSGL_WARN,
                 "[reorder_ch] Unsupported sample size: %d, please "
                 "report this error on the MPlayer mailing list.\n",samplesize);
          return 0;
      }
      return 1;
  }
  
  #define REORDER_SELF_SWAP_3_3(SRC,TMP,SAMPLES,CHNUM,S0,S1,S2,S3,S4,S5) \
  for (i = 0; i < SAMPLES; i += CHNUM) {\
      TMP = SRC[i+S0];\
      SRC[i+S0] = SRC[i+S1];\
      SRC[i+S1] = SRC[i+S2];\
      SRC[i+S2] = TMP;\
      TMP = SRC[i+S3];\
      SRC[i+S3] = SRC[i+S4];\
      SRC[i+S4] = SRC[i+S5];\
      SRC[i+S5] = TMP;\
  }
  
  static int reorder_self_3_3(void *src, unsigned int samples,
                              unsigned int samplesize,
                              int s0, int s1, int s2, int s3, int s4, int s5)
  {
      int i;
      switch (samplesize) {
      case 1:
      {
          int8_t *src_8 = src;
          int8_t tmp;
          REORDER_SELF_SWAP_3_3(src_8,tmp,samples,6,s0,s1,s2,s3,s4,s5);
          break;
      }
      case 2:
      {
          int16_t *src_16 = src;
          int16_t tmp;
          REORDER_SELF_SWAP_3_3(src_16,tmp,samples,6,s0,s1,s2,s3,s4,s5);
          break;
      }
      case 3:
      {
          int8_t *src_8 = src;
          int8_t tmp0, tmp1, tmp2;
          for (i = 0; i < samples * 3; i += 18) {
              tmp0 = src_8[i+s0*3];
              tmp1 = src_8[i+s0*3+1];
              tmp2 = src_8[i+s0*3+2];
              src_8[i+s0*3]   = src_8[i+s1*3];
              src_8[i+s0*3+1] = src_8[i+s1*3+1];
              src_8[i+s0*3+2] = src_8[i+s1*3+2];
              src_8[i+s1*3]   = src_8[i+s2*3];
              src_8[i+s1*3+1] = src_8[i+s2*3+1];
              src_8[i+s1*3+2] = src_8[i+s2*3+2];
              src_8[i+s2*3]   = tmp0;
              src_8[i+s2*3+1] = tmp1;
              src_8[i+s2*3+2] = tmp2;
              tmp0 = src_8[i+s3*3];
              tmp1 = src_8[i+s3*3+1];
              tmp2 = src_8[i+s3*3+2];
              src_8[i+s3*3]   = src_8[i+s4*3];
              src_8[i+s3*3+1] = src_8[i+s4*3+1];
              src_8[i+s3*3+2] = src_8[i+s4*3+2];
              src_8[i+s4*3]   = src_8[i+s5*3];
              src_8[i+s4*3+1] = src_8[i+s5*3+1];
              src_8[i+s4*3+2] = src_8[i+s5*3+2];
              src_8[i+s5*3]   = tmp0;
              src_8[i+s5*3+1] = tmp1;
              src_8[i+s5*3+2] = tmp2;
          }
          break;
      }
      case 4:
      {
          int32_t *src_32 = src;
          int32_t tmp;
          REORDER_SELF_SWAP_3_3(src_32,tmp,samples,6,s0,s1,s2,s3,s4,s5);
          break;
      }
      case 8:
      {
          int64_t *src_64 = src;
          int64_t tmp;
          REORDER_SELF_SWAP_3_3(src_64,tmp,samples,6,s0,s1,s2,s3,s4,s5);
          break;
      }
      default:
          mp_msg(MSGT_GLOBAL, MSGL_WARN,
                 "[reorder_ch] Unsupported sample size: %d, please "
                 "report this error on the MPlayer mailing list.\n",samplesize);
          return 0;
      }
      return 1;
  }
  
  #define REORDER_SELF_SWAP_2_4(SRC,TMP,SAMPLES,CHNUM,S0,S1,S2,S3,S4,S5) \
  for (i = 0; i < SAMPLES; i += CHNUM) {\
      TMP = SRC[i+S0];\
      SRC[i+S0] = SRC[i+S1];\
      SRC[i+S1] = TMP;\
      TMP = SRC[i+S2];\
      SRC[i+S2] = SRC[i+S3];\
      SRC[i+S3] = SRC[i+S4];\
      SRC[i+S4] = SRC[i+S5];\
      SRC[i+S5] = TMP;\
  }
  
  static int reorder_self_2_4(void *src, unsigned int samples,
                              unsigned int samplesize, int chnum,
                              int s0, int s1, int s2, int s3, int s4, int s5)
  {
      int i;
      switch (samplesize) {
      case 1:
      {
          int8_t *src_8 = src;
          int8_t tmp;
          if (chnum==6) {
              REORDER_SELF_SWAP_2_4(src_8,tmp,samples,6,s0,s1,s2,s3,s4,s5);
          } else {
              REORDER_SELF_SWAP_2_4(src_8,tmp,samples,8,s0,s1,s2,s3,s4,s5);
          }
          break;
      }
      case 2:
      {
          int16_t *src_16 = src;
          int16_t tmp;
          if (chnum==6) {
              REORDER_SELF_SWAP_2_4(src_16,tmp,samples,6,s0,s1,s2,s3,s4,s5);
          } else {
              REORDER_SELF_SWAP_2_4(src_16,tmp,samples,8,s0,s1,s2,s3,s4,s5);
          }
          break;
      }
      case 3:
      {
          int8_t *src_8 = src;
          int8_t tmp0, tmp1, tmp2;
          for (i = 0; i < samples * 3; i += chnum * 3) {
              tmp0 = src_8[i+s0*3];
              tmp1 = src_8[i+s0*3+1];
              tmp2 = src_8[i+s0*3+2];
              src_8[i+s0*3]   = src_8[i+s1*3];
              src_8[i+s0*3+1] = src_8[i+s1*3+1];
              src_8[i+s0*3+2] = src_8[i+s1*3+2];
              src_8[i+s1*3]   = tmp0;
              src_8[i+s1*3+1] = tmp1;
              src_8[i+s1*3+2] = tmp2;
              tmp0 = src_8[i+s2*3];
              tmp1 = src_8[i+s2*3+1];
              tmp2 = src_8[i+s2*3+2];
              src_8[i+s2*3]   = src_8[i+s3*3];
              src_8[i+s2*3+1] = src_8[i+s3*3+1];
              src_8[i+s2*3+2] = src_8[i+s3*3+2];
              src_8[i+s3*3]   = src_8[i+s4*3];
              src_8[i+s3*3+1] = src_8[i+s4*3+1];
              src_8[i+s3*3+2] = src_8[i+s4*3+2];
              src_8[i+s4*3]   = src_8[i+s5*3];
              src_8[i+s4*3+1] = src_8[i+s5*3+1];
              src_8[i+s4*3+2] = src_8[i+s5*3+2];
              src_8[i+s5*3]   = tmp0;
              src_8[i+s5*3+1] = tmp1;
              src_8[i+s5*3+2] = tmp2;
          }
          break;
      }
      case 4:
      {
          int32_t *src_32 = src;
          int32_t tmp;
          if (chnum==6) {
              REORDER_SELF_SWAP_2_4(src_32,tmp,samples,6,s0,s1,s2,s3,s4,s5);
          } else {
              REORDER_SELF_SWAP_2_4(src_32,tmp,samples,8,s0,s1,s2,s3,s4,s5);
          }
          break;
      }
      case 8:
      {
          int64_t *src_64 = src;
          int64_t tmp;
          if (chnum==6) {
              REORDER_SELF_SWAP_2_4(src_64,tmp,samples,6,s0,s1,s2,s3,s4,s5);
          } else {
              REORDER_SELF_SWAP_2_4(src_64,tmp,samples,8,s0,s1,s2,s3,s4,s5);
          }
          break;
      }
      default:
          mp_msg(MSGT_GLOBAL, MSGL_WARN,
                 "[reorder_ch] Unsupported sample size: %d, please "
                 "report this error on the MPlayer mailing list.\n",samplesize);
          return 0;
      }
      return 1;
  }
  
  void reorder_channel(void *src,
                       int src_layout,
                       int dest_layout,
                       int samples,
                       int samplesize)
  {
      if (dest_layout==src_layout)
          return;
      if (!AF_IS_SAME_CH_NUM(dest_layout,src_layout)) {
          mp_msg(MSGT_GLOBAL, MSGL_WARN,
                 "[reorder_channel] different channel count "
                 "between current and target: %x, %x\n",
                 AF_GET_CH_NUM_WITH_LFE(src_layout),
                 AF_GET_CH_NUM_WITH_LFE(dest_layout));
          return;
      }
      switch ((src_layout<<16)|dest_layout) {
      // AF_CHANNEL_LAYOUT_5_0_A   L R C Ls Rs
      // AF_CHANNEL_LAYOUT_5_0_B   L R Ls Rs C
      // AF_CHANNEL_LAYOUT_5_0_C   L C R Ls Rs
      // AF_CHANNEL_LAYOUT_5_0_D   C L R Ls Rs
      case AF_CHANNEL_LAYOUT_5_0_A << 16 | AF_CHANNEL_LAYOUT_5_0_B:
          reorder_self_3(src, samples, samplesize, 5, 2, 3, 4);
          break;
      case AF_CHANNEL_LAYOUT_5_0_A << 16 | AF_CHANNEL_LAYOUT_5_0_C:
          reorder_self_2(src, samples, samplesize, 5, 1, 2);
          break;
      case AF_CHANNEL_LAYOUT_5_0_A << 16 | AF_CHANNEL_LAYOUT_5_0_D:
          reorder_self_3(src, samples, samplesize, 5, 2, 1, 0);
          break;
      case AF_CHANNEL_LAYOUT_5_0_B << 16 | AF_CHANNEL_LAYOUT_5_0_A:
          reorder_self_3(src, samples, samplesize, 5, 4, 3, 2);
          break;
      case AF_CHANNEL_LAYOUT_5_0_B << 16 | AF_CHANNEL_LAYOUT_5_0_C:
          reorder_self_4_step_1(src, samples, samplesize, 5, 4, 3, 2, 1);
          break;
      case AF_CHANNEL_LAYOUT_5_0_B << 16 | AF_CHANNEL_LAYOUT_5_0_D:
          reorder_self_5_step_1(src, samples, samplesize, 5, 4, 3, 2, 1, 0);
          break;
      case AF_CHANNEL_LAYOUT_5_0_C << 16 | AF_CHANNEL_LAYOUT_5_0_A:
          reorder_self_2(src, samples, samplesize, 5, 1, 2);
          break;
      case AF_CHANNEL_LAYOUT_5_0_C << 16 | AF_CHANNEL_LAYOUT_5_0_B:
          reorder_self_4_step_1(src, samples, samplesize, 5, 1, 2, 3, 4);
          break;
      case AF_CHANNEL_LAYOUT_5_0_C << 16 | AF_CHANNEL_LAYOUT_5_0_D:
          reorder_self_2(src, samples, samplesize, 5, 0, 1);
          break;
      case AF_CHANNEL_LAYOUT_5_0_D << 16 | AF_CHANNEL_LAYOUT_5_0_A:
          reorder_self_3(src, samples, samplesize, 5, 0, 1, 2);
          break;
      case AF_CHANNEL_LAYOUT_5_0_D << 16 | AF_CHANNEL_LAYOUT_5_0_B:
          reorder_self_5_step_1(src, samples, samplesize, 5, 0, 1, 2, 3, 4);
          break;
      case AF_CHANNEL_LAYOUT_5_0_D << 16 | AF_CHANNEL_LAYOUT_5_0_C:
          reorder_self_2(src, samples, samplesize, 5, 0, 1);
          break;
      // AF_CHANNEL_LAYOUT_5_1_A   L R C LFE Ls Rs
      // AF_CHANNEL_LAYOUT_5_1_B   L R Ls Rs C LFE
      // AF_CHANNEL_LAYOUT_5_1_C   L C R Ls Rs LFE
      // AF_CHANNEL_LAYOUT_5_1_D   C L R Ls Rs LFE
      // AF_CHANNEL_LAYOUT_5_1_E   LFE L C R Ls Rs
      case AF_CHANNEL_LAYOUT_5_1_A << 16 | AF_CHANNEL_LAYOUT_5_1_B:
          if (samplesize != 3)
              reorder_self_2(src, samples/2, samplesize*2, 3, 1, 2);
          else
              reorder_self_4_step_2(src, samples, samplesize, 6, 2, 3, 4, 5);
          break;
      case AF_CHANNEL_LAYOUT_5_1_A << 16 | AF_CHANNEL_LAYOUT_5_1_C:
          reorder_self_2_3(src, samples, samplesize, 1, 2, 3, 4, 5);
          break;
      case AF_CHANNEL_LAYOUT_5_1_A << 16 | AF_CHANNEL_LAYOUT_5_1_D:
          reorder_self_3_3(src, samples, samplesize, 2, 1, 0, 3, 4, 5);
          break;
      case AF_CHANNEL_LAYOUT_5_1_B << 16 | AF_CHANNEL_LAYOUT_5_1_A:
          if (samplesize != 3)
              reorder_self_2(src, samples/2, samplesize*2, 3, 1, 2);
          else
              reorder_self_4_step_2(src, samples, samplesize, 6, 2, 3, 4, 5);
          break;
      case AF_CHANNEL_LAYOUT_5_1_B << 16 | AF_CHANNEL_LAYOUT_5_1_C:
          reorder_self_4_step_1(src, samples, samplesize, 6, 4, 3, 2, 1);
          break;
      case AF_CHANNEL_LAYOUT_5_1_B << 16 | AF_CHANNEL_LAYOUT_5_1_D:
          reorder_self_5_step_1(src, samples, samplesize, 6, 4, 3, 2, 1, 0);
          break;
      case AF_CHANNEL_LAYOUT_5_1_B << 16 | AF_CHANNEL_LAYOUT_5_1_E:
          reorder_self_2_4(src, samples, samplesize, 6, 2, 4, 5, 3, 1, 0);
          break;
      case AF_CHANNEL_LAYOUT_5_1_C << 16 | AF_CHANNEL_LAYOUT_5_1_A:
          reorder_self_2_3(src, samples, samplesize, 1, 2, 5, 4, 3);
          break;
      case AF_CHANNEL_LAYOUT_5_1_C << 16 | AF_CHANNEL_LAYOUT_5_1_B:
          reorder_self_4_step_1(src, samples, samplesize, 6, 1, 2, 3, 4);
          break;
      case AF_CHANNEL_LAYOUT_5_1_C << 16 | AF_CHANNEL_LAYOUT_5_1_D:
          reorder_self_2(src, samples, samplesize, 6, 0, 1);
          break;
      case AF_CHANNEL_LAYOUT_5_1_D << 16 | AF_CHANNEL_LAYOUT_5_1_A:
          reorder_self_3_3(src, samples, samplesize, 0, 1, 2, 5, 4, 3);
          break;
      case AF_CHANNEL_LAYOUT_5_1_D << 16 | AF_CHANNEL_LAYOUT_5_1_B:
          reorder_self_5_step_1(src, samples, samplesize, 6, 0, 1, 2, 3, 4);
          break;
      case AF_CHANNEL_LAYOUT_5_1_D << 16 | AF_CHANNEL_LAYOUT_5_1_C:
          reorder_self_2(src, samples, samplesize, 6, 0, 1);
          break;
      case AF_CHANNEL_LAYOUT_5_1_E << 16 | AF_CHANNEL_LAYOUT_5_1_B:
          reorder_self_2_4(src, samples, samplesize, 6, 2, 4, 0, 1, 3, 5);
          break;
      case AF_CHANNEL_LAYOUT_5_1_F << 16 | AF_CHANNEL_LAYOUT_5_1_B:
          reorder_self_2_4(src, samples, samplesize, 6, 3, 5, 0, 1, 2, 4);
          break;
      // AF_CHANNEL_LAYOUT_7_1_A   L R C LFE Ls Rs Rls Rrs
      // AF_CHANNEL_LAYOUT_7_1_B   L R Ls Rs C LFE Rls Rrs
      // AF_CHANNEL_LAYOUT_7_1_C   L C R Ls Rs LFE Rls Rrs
      // AF_CHANNEL_LAYOUT_7_1_D   C L R Ls Rs Rls Rrs LFE
      // AF_CHANNEL_LAYOUT_7_1_F   C L R LFE Ls Rs Rls Rrs
      case AF_CHANNEL_LAYOUT_7_1_A << 16 | AF_CHANNEL_LAYOUT_7_1_B:
      case AF_CHANNEL_LAYOUT_7_1_B << 16 | AF_CHANNEL_LAYOUT_7_1_A:
          if (samplesize != 3)
              reorder_self_2(src, samples/2, samplesize*2, 4, 1, 2);
          else
              reorder_self_4_step_2(src, samples, samplesize, 8, 2, 3, 4, 5);
          break;
      case AF_CHANNEL_LAYOUT_7_1_B << 16 | AF_CHANNEL_LAYOUT_7_1_D:
          // First convert to AF_CHANNEL_LAYOUT_7_1_F
          reorder_self_2_4(src, samples, samplesize, 8, 3, 5, 4, 2, 1, 0);
          // then convert to AF_CHANNEL_LAYOUT_7_1_D
          reorder_self_5_step_1(src, samples, samplesize, 8, 3, 4, 5, 6, 7);
          break;
      case AF_CHANNEL_LAYOUT_7_1_C << 16 | AF_CHANNEL_LAYOUT_7_1_B:
          reorder_self_4_step_1(src, samples, samplesize, 8, 1, 2, 3, 4);
          break;
      case AF_CHANNEL_LAYOUT_7_1_F << 16 | AF_CHANNEL_LAYOUT_7_1_B:
          reorder_self_2_4(src, samples, samplesize, 8, 3, 5, 0, 1, 2, 4);
          break;
      default:
          mp_msg(MSGT_GLOBAL, MSGL_WARN,
                 "[reorder_channel] unsupported from %x to %x, %d * %d\n",
                 src_layout, dest_layout, samples, samplesize);
      }
  }
  
  
  static int channel_layout_mapping_5ch[AF_CHANNEL_LAYOUT_SOURCE_NUM] = {
      AF_CHANNEL_LAYOUT_ALSA_5CH_DEFAULT,
      AF_CHANNEL_LAYOUT_AAC_5CH_DEFAULT,
      AF_CHANNEL_LAYOUT_WAVEEX_5CH_DEFAULT,
      AF_CHANNEL_LAYOUT_LAVC_5CH_DEFAULT,
      AF_CHANNEL_LAYOUT_VORBIS_5CH_DEFAULT,
  };
  
  static int channel_layout_mapping_6ch[AF_CHANNEL_LAYOUT_SOURCE_NUM] = {
      AF_CHANNEL_LAYOUT_ALSA_6CH_DEFAULT,
      AF_CHANNEL_LAYOUT_AAC_6CH_DEFAULT,
      AF_CHANNEL_LAYOUT_WAVEEX_6CH_DEFAULT,
      AF_CHANNEL_LAYOUT_LAVC_6CH_DEFAULT,
      AF_CHANNEL_LAYOUT_VORBIS_6CH_DEFAULT,
  };
  
  static int channel_layout_mapping_8ch[AF_CHANNEL_LAYOUT_SOURCE_NUM] = {
      AF_CHANNEL_LAYOUT_ALSA_8CH_DEFAULT,
      AF_CHANNEL_LAYOUT_AAC_8CH_DEFAULT,
      AF_CHANNEL_LAYOUT_WAVEEX_8CH_DEFAULT,
      AF_CHANNEL_LAYOUT_LAVC_8CH_DEFAULT,
      AF_CHANNEL_LAYOUT_VORBIS_8CH_DEFAULT,
  };
  
  void reorder_channel_copy_nch(void *src,
                                int src_layout,
                                void *dest,
                                int dest_layout,
                                int chnum,
                                int samples,
                                int samplesize)
  {
      if (chnum < 5 || chnum == 7 || chnum > 8 ||
              src_layout < 0 || dest_layout < 0 ||
              src_layout >= AF_CHANNEL_LAYOUT_SOURCE_NUM ||
              dest_layout >= AF_CHANNEL_LAYOUT_SOURCE_NUM)
          fast_memcpy(dest, src, samples*samplesize);
      else if (chnum == 6)
          reorder_channel_copy(src, channel_layout_mapping_6ch[src_layout],
                               dest, channel_layout_mapping_6ch[dest_layout],
                               samples, samplesize);
      else if (chnum == 8)
          reorder_channel_copy(src, channel_layout_mapping_8ch[src_layout],
                               dest, channel_layout_mapping_8ch[dest_layout],
                               samples, samplesize);
      else
          reorder_channel_copy(src, channel_layout_mapping_5ch[src_layout],
                               dest, channel_layout_mapping_5ch[dest_layout],
                               samples, samplesize);
  }
  
  void reorder_channel_nch(void *buf,
                           int src_layout,
                           int dest_layout,
                           int chnum,
                           int samples,
                           int samplesize)
  {
      if (src_layout == dest_layout || chnum < 5 || chnum == 7 || chnum > 8 ||
              src_layout < 0 || dest_layout < 0 ||
              src_layout >= AF_CHANNEL_LAYOUT_SOURCE_NUM ||
              dest_layout >= AF_CHANNEL_LAYOUT_SOURCE_NUM ||
              src_layout == dest_layout)
          return;
      if (chnum == 6)
          reorder_channel(buf, channel_layout_mapping_6ch[src_layout],
                          channel_layout_mapping_6ch[dest_layout],
                          samples, samplesize);
      else if (chnum == 8)
          reorder_channel(buf, channel_layout_mapping_8ch[src_layout],
                          channel_layout_mapping_8ch[dest_layout],
                          samples, samplesize);
      else
          reorder_channel(buf, channel_layout_mapping_5ch[src_layout],
                          channel_layout_mapping_5ch[dest_layout],
                          samples, samplesize);
  }
  
  
  #ifdef TEST
  
  static void test_copy(int channels) {
      int samples = 12*1024*1024;
      int samplesize = 2;
      int i;
      unsigned char *bufin = malloc((samples+100)*samplesize);
      unsigned char *bufout = malloc((samples+100)*samplesize);
      memset(bufin, 0xFF, samples*samplesize);
      for (i = 0;i < 100; ++i)
          reorder_channel_copy(bufin, AF_CHANNEL_LAYOUT_5_1_A,
                               bufout, AF_CHANNEL_LAYOUT_5_1_B,
                               samples, samplesize);
  //    reorder_channel(bufin, AF_CHANNEL_LAYOUT_5_1_B,
  //                         AF_CHANNEL_LAYOUT_5_1_D,
  //                         samples, samplesize);
      free(bufin);
      free(bufout);
  }
  
  int main(int argc, char *argv[]) {
      int channels = 6;
      if (argc > 1)
          channels = atoi(argv[1]);
      test_copy(channels);
      return 0;
  }
  
  #endif
  