diff options
Diffstat (limited to 'src/pcm_channels.c')
| -rw-r--r-- | src/pcm_channels.c | 246 |
1 files changed, 0 insertions, 246 deletions
diff --git a/src/pcm_channels.c b/src/pcm_channels.c deleted file mode 100644 index ec2bd69a..00000000 --- a/src/pcm_channels.c +++ /dev/null @@ -1,246 +0,0 @@ -/* - * Copyright (C) 2003-2011 The Music Player Daemon Project - * http://www.musicpd.org - * - * This program 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. - * - * This program 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 this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - */ - -#include "config.h" -#include "pcm_channels.h" -#include "pcm_buffer.h" -#include "pcm_utils.h" - -#include <assert.h> - -static void -pcm_convert_channels_16_1_to_2(int16_t *restrict dest, - const int16_t *restrict src, - const int16_t *restrict src_end) -{ - while (src < src_end) { - int16_t value = *src++; - - *dest++ = value; - *dest++ = value; - } -} - -static void -pcm_convert_channels_16_2_to_1(int16_t *restrict dest, - const int16_t *restrict src, - const int16_t *restrict src_end) -{ - while (src < src_end) { - int32_t a = *src++, b = *src++; - - *dest++ = (a + b) / 2; - } -} - -static void -pcm_convert_channels_16_n_to_2(int16_t *restrict dest, - unsigned src_channels, - const int16_t *restrict src, - const int16_t *restrict src_end) -{ - unsigned c; - - assert(src_channels > 0); - - while (src < src_end) { - int32_t sum = 0; - int16_t value; - - for (c = 0; c < src_channels; ++c) - sum += *src++; - value = sum / (int)src_channels; - - /* XXX this is actually only mono ... */ - *dest++ = value; - *dest++ = value; - } -} - -const int16_t * -pcm_convert_channels_16(struct pcm_buffer *buffer, - unsigned dest_channels, - unsigned src_channels, const int16_t *src, - size_t src_size, size_t *dest_size_r) -{ - assert(src_size % (sizeof(*src) * src_channels) == 0); - - size_t dest_size = src_size / src_channels * dest_channels; - *dest_size_r = dest_size; - - int16_t *dest = pcm_buffer_get(buffer, dest_size); - const int16_t *src_end = pcm_end_pointer(src, src_size); - - if (src_channels == 1 && dest_channels == 2) - pcm_convert_channels_16_1_to_2(dest, src, src_end); - else if (src_channels == 2 && dest_channels == 1) - pcm_convert_channels_16_2_to_1(dest, src, src_end); - else if (dest_channels == 2) - pcm_convert_channels_16_n_to_2(dest, src_channels, src, - src_end); - else - return NULL; - - return dest; -} - -static void -pcm_convert_channels_24_1_to_2(int32_t *restrict dest, - const int32_t *restrict src, - const int32_t *restrict src_end) -{ - while (src < src_end) { - int32_t value = *src++; - - *dest++ = value; - *dest++ = value; - } -} - -static void -pcm_convert_channels_24_2_to_1(int32_t *restrict dest, - const int32_t *restrict src, - const int32_t *restrict src_end) -{ - while (src < src_end) { - int32_t a = *src++, b = *src++; - - *dest++ = (a + b) / 2; - } -} - -static void -pcm_convert_channels_24_n_to_2(int32_t *restrict dest, - unsigned src_channels, - const int32_t *restrict src, - const int32_t *restrict src_end) -{ - unsigned c; - - assert(src_channels > 0); - - while (src < src_end) { - int32_t sum = 0; - int32_t value; - - for (c = 0; c < src_channels; ++c) - sum += *src++; - value = sum / (int)src_channels; - - /* XXX this is actually only mono ... */ - *dest++ = value; - *dest++ = value; - } -} - -const int32_t * -pcm_convert_channels_24(struct pcm_buffer *buffer, - unsigned dest_channels, - unsigned src_channels, const int32_t *src, - size_t src_size, size_t *dest_size_r) -{ - assert(src_size % (sizeof(*src) * src_channels) == 0); - - size_t dest_size = src_size / src_channels * dest_channels; - *dest_size_r = dest_size; - - int32_t *dest = pcm_buffer_get(buffer, dest_size); - const int32_t *src_end = pcm_end_pointer(src, src_size); - - if (src_channels == 1 && dest_channels == 2) - pcm_convert_channels_24_1_to_2(dest, src, src_end); - else if (src_channels == 2 && dest_channels == 1) - pcm_convert_channels_24_2_to_1(dest, src, src_end); - else if (dest_channels == 2) - pcm_convert_channels_24_n_to_2(dest, src_channels, src, - src_end); - else - return NULL; - - return dest; -} - -static void -pcm_convert_channels_32_1_to_2(int32_t *dest, const int32_t *src, - const int32_t *src_end) -{ - pcm_convert_channels_24_1_to_2(dest, src, src_end); -} - -static void -pcm_convert_channels_32_2_to_1(int32_t *restrict dest, - const int32_t *restrict src, - const int32_t *restrict src_end) -{ - while (src < src_end) { - int64_t a = *src++, b = *src++; - - *dest++ = (a + b) / 2; - } -} - -static void -pcm_convert_channels_32_n_to_2(int32_t *dest, - unsigned src_channels, const int32_t *src, - const int32_t *src_end) -{ - unsigned c; - - assert(src_channels > 0); - - while (src < src_end) { - int64_t sum = 0; - int32_t value; - - for (c = 0; c < src_channels; ++c) - sum += *src++; - value = sum / (int64_t)src_channels; - - /* XXX this is actually only mono ... */ - *dest++ = value; - *dest++ = value; - } -} - -const int32_t * -pcm_convert_channels_32(struct pcm_buffer *buffer, - unsigned dest_channels, - unsigned src_channels, const int32_t *src, - size_t src_size, size_t *dest_size_r) -{ - assert(src_size % (sizeof(*src) * src_channels) == 0); - - size_t dest_size = src_size / src_channels * dest_channels; - *dest_size_r = dest_size; - - int32_t *dest = pcm_buffer_get(buffer, dest_size); - const int32_t *src_end = pcm_end_pointer(src, src_size); - - if (src_channels == 1 && dest_channels == 2) - pcm_convert_channels_32_1_to_2(dest, src, src_end); - else if (src_channels == 2 && dest_channels == 1) - pcm_convert_channels_32_2_to_1(dest, src, src_end); - else if (dest_channels == 2) - pcm_convert_channels_32_n_to_2(dest, src_channels, src, - src_end); - else - return NULL; - - return dest; -} |