diff options
Diffstat (limited to 'libavcore/audioconvert.c')
| -rw-r--r-- | libavcore/audioconvert.c | 116 |
1 files changed, 0 insertions, 116 deletions
diff --git a/libavcore/audioconvert.c b/libavcore/audioconvert.c deleted file mode 100644 index c7207338a4..0000000000 --- a/libavcore/audioconvert.c +++ /dev/null @@ -1,116 +0,0 @@ -/* - * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> - * - * This file is part of FFmpeg. - * - * FFmpeg is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * FFmpeg 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 - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with FFmpeg; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -/** - * @file - * audio conversion routines - */ - -#include "libavutil/avstring.h" -#include "audioconvert.h" - -static const char * const channel_names[] = { - "FL", "FR", "FC", "LFE", "BL", "BR", "FLC", "FRC", - "BC", "SL", "SR", "TC", "TFL", "TFC", "TFR", "TBL", - "TBC", "TBR", - [29] = "DL", - [30] = "DR", -}; - -static const char *get_channel_name(int channel_id) -{ - if (channel_id < 0 || channel_id >= FF_ARRAY_ELEMS(channel_names)) - return NULL; - return channel_names[channel_id]; -} - -static const struct { - const char *name; - int nb_channels; - int64_t layout; -} channel_layout_map[] = { - { "mono", 1, AV_CH_LAYOUT_MONO }, - { "stereo", 2, AV_CH_LAYOUT_STEREO }, - { "4.0", 4, AV_CH_LAYOUT_4POINT0 }, - { "quad", 4, AV_CH_LAYOUT_QUAD }, - { "5.0", 5, AV_CH_LAYOUT_5POINT0 }, - { "5.0", 5, AV_CH_LAYOUT_5POINT0_BACK }, - { "5.1", 6, AV_CH_LAYOUT_5POINT1 }, - { "5.1", 6, AV_CH_LAYOUT_5POINT1_BACK }, - { "5.1+downmix", 8, AV_CH_LAYOUT_5POINT1|AV_CH_LAYOUT_STEREO_DOWNMIX, }, - { "7.1", 8, AV_CH_LAYOUT_7POINT1 }, - { "7.1(wide)", 8, AV_CH_LAYOUT_7POINT1_WIDE }, - { "7.1+downmix", 10, AV_CH_LAYOUT_7POINT1|AV_CH_LAYOUT_STEREO_DOWNMIX, }, - { 0 } -}; - -int64_t av_get_channel_layout(const char *name) -{ - int i = 0; - do { - if (!strcmp(channel_layout_map[i].name, name)) - return channel_layout_map[i].layout; - i++; - } while (channel_layout_map[i].name); - - return 0; -} - -void av_get_channel_layout_string(char *buf, int buf_size, - int nb_channels, int64_t channel_layout) -{ - int i; - - if (nb_channels <= 0) - nb_channels = av_get_channel_layout_nb_channels(channel_layout); - - for (i = 0; channel_layout_map[i].name; i++) - if (nb_channels == channel_layout_map[i].nb_channels && - channel_layout == channel_layout_map[i].layout) { - av_strlcpy(buf, channel_layout_map[i].name, buf_size); - return; - } - - snprintf(buf, buf_size, "%d channels", nb_channels); - if (channel_layout) { - int i,ch; - av_strlcat(buf, " (", buf_size); - for(i=0,ch=0; i<64; i++) { - if ((channel_layout & (1L<<i))) { - const char *name = get_channel_name(i); - if (name) { - if (ch>0) av_strlcat(buf, "|", buf_size); - av_strlcat(buf, name, buf_size); - } - ch++; - } - } - av_strlcat(buf, ")", buf_size); - } -} - -int av_get_channel_layout_nb_channels(int64_t channel_layout) -{ - int count; - uint64_t x = channel_layout; - for (count = 0; x; count++) - x &= x-1; // unset lowest set bit - return count; -} |