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author | Justin Ruggles <justin.ruggles@gmail.com> | 2012-11-10 09:03:17 -0500 |
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committer | Justin Ruggles <justin.ruggles@gmail.com> | 2012-11-11 13:35:12 -0500 |
commit | 5980f5dd18822f29cfd583c9c085c3e77d81aa72 (patch) | |
tree | fd0f7c657d16f251d00247cff8e43cc596b5b981 /libavutil/audioconvert.c | |
parent | 802713c4e7b41bc2deed754d78649945c3442063 (diff) | |
download | ffmpeg-5980f5dd18822f29cfd583c9c085c3e77d81aa72.tar.gz |
lavu: rename audioconvert.* to channel_layout.* and deprecate audioconvert.h
Diffstat (limited to 'libavutil/audioconvert.c')
-rw-r--r-- | libavutil/audioconvert.c | 231 |
1 files changed, 0 insertions, 231 deletions
diff --git a/libavutil/audioconvert.c b/libavutil/audioconvert.c deleted file mode 100644 index 113b9d782d..0000000000 --- a/libavutil/audioconvert.c +++ /dev/null @@ -1,231 +0,0 @@ -/* - * Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> - * - * This file is part of Libav. - * - * Libav 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. - * - * Libav 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 Libav; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -/** - * @file - * audio conversion routines - */ - -#include "avstring.h" -#include "avutil.h" -#include "audioconvert.h" -#include "common.h" - -static const char * const channel_names[] = { - [0] = "FL", /* front left */ - [1] = "FR", /* front right */ - [2] = "FC", /* front center */ - [3] = "LFE", /* low frequency */ - [4] = "BL", /* back left */ - [5] = "BR", /* back right */ - [6] = "FLC", /* front left-of-center */ - [7] = "FRC", /* front right-of-center */ - [8] = "BC", /* back-center */ - [9] = "SL", /* side left */ - [10] = "SR", /* side right */ - [11] = "TC", /* top center */ - [12] = "TFL", /* top front left */ - [13] = "TFC", /* top front center */ - [14] = "TFR", /* top front right */ - [15] = "TBL", /* top back left */ - [16] = "TBC", /* top back center */ - [17] = "TBR", /* top back right */ - [29] = "DL", /* downmix left */ - [30] = "DR", /* downmix right */ - [31] = "WL", /* wide left */ - [32] = "WR", /* wide right */ - [33] = "SDL", /* surround direct left */ - [34] = "SDR", /* surround direct right */ - [35] = "LFE2", /* low frequency 2 */ -}; - -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; - uint64_t layout; -} channel_layout_map[] = { - { "mono", 1, AV_CH_LAYOUT_MONO }, - { "stereo", 2, AV_CH_LAYOUT_STEREO }, - { "stereo", 2, AV_CH_LAYOUT_STEREO_DOWNMIX }, - { "2.1", 3, AV_CH_LAYOUT_2POINT1 }, - { "3.0", 3, AV_CH_LAYOUT_SURROUND }, - { "3.0(back)", 3, AV_CH_LAYOUT_2_1 }, - { "3.1", 4, AV_CH_LAYOUT_3POINT1 }, - { "4.0", 4, AV_CH_LAYOUT_4POINT0 }, - { "quad", 4, AV_CH_LAYOUT_QUAD }, - { "quad(side)", 4, AV_CH_LAYOUT_2_2 }, - { "4.1", 5, AV_CH_LAYOUT_4POINT1 }, - { "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 }, - { "6.0", 6, AV_CH_LAYOUT_6POINT0 }, - { "6.0(front)", 6, AV_CH_LAYOUT_6POINT0_FRONT }, - { "hexagonal", 6, AV_CH_LAYOUT_HEXAGONAL }, - { "6.1", 7, AV_CH_LAYOUT_6POINT1 }, - { "6.1", 7, AV_CH_LAYOUT_6POINT1_BACK }, - { "6.1(front)", 7, AV_CH_LAYOUT_6POINT1_FRONT }, - { "7.0", 7, AV_CH_LAYOUT_7POINT0 }, - { "7.0(front)", 7, AV_CH_LAYOUT_7POINT0_FRONT }, - { "7.1", 8, AV_CH_LAYOUT_7POINT1 }, - { "7.1(wide)", 8, AV_CH_LAYOUT_7POINT1_WIDE }, - { "7.1(wide)", 8, AV_CH_LAYOUT_7POINT1_WIDE_BACK }, - { "octagonal", 8, AV_CH_LAYOUT_OCTAGONAL }, - { "downmix", 2, AV_CH_LAYOUT_STEREO_DOWNMIX, }, - { 0 } -}; - -static uint64_t get_channel_layout_single(const char *name, int name_len) -{ - int i; - char *end; - int64_t layout; - - for (i = 0; i < FF_ARRAY_ELEMS(channel_layout_map) - 1; i++) { - if (strlen(channel_layout_map[i].name) == name_len && - !memcmp(channel_layout_map[i].name, name, name_len)) - return channel_layout_map[i].layout; - } - for (i = 0; i < FF_ARRAY_ELEMS(channel_names); i++) - if (channel_names[i] && - strlen(channel_names[i]) == name_len && - !memcmp(channel_names[i], name, name_len)) - return (int64_t)1 << i; - i = strtol(name, &end, 10); - if (end - name == name_len || - (end + 1 - name == name_len && *end == 'c')) - return av_get_default_channel_layout(i); - layout = strtoll(name, &end, 0); - if (end - name == name_len) - return FFMAX(layout, 0); - return 0; -} - -uint64_t av_get_channel_layout(const char *name) -{ - const char *n, *e; - const char *name_end = name + strlen(name); - int64_t layout = 0, layout_single; - - for (n = name; n < name_end; n = e + 1) { - for (e = n; e < name_end && *e != '+' && *e != '|'; e++); - layout_single = get_channel_layout_single(n, e - n); - if (!layout_single) - return 0; - layout |= layout_single; - } - return layout; -} - -void av_get_channel_layout_string(char *buf, int buf_size, - int nb_channels, uint64_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 & (UINT64_C(1) << 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(uint64_t channel_layout) -{ - return av_popcount64(channel_layout); -} - -uint64_t av_get_default_channel_layout(int nb_channels) -{ - switch(nb_channels) { - case 1: return AV_CH_LAYOUT_MONO; - case 2: return AV_CH_LAYOUT_STEREO; - case 3: return AV_CH_LAYOUT_SURROUND; - case 4: return AV_CH_LAYOUT_QUAD; - case 5: return AV_CH_LAYOUT_5POINT0; - case 6: return AV_CH_LAYOUT_5POINT1; - case 7: return AV_CH_LAYOUT_6POINT1; - case 8: return AV_CH_LAYOUT_7POINT1; - default: return 0; - } -} - -int av_get_channel_layout_channel_index(uint64_t channel_layout, - uint64_t channel) -{ - if (!(channel_layout & channel) || - av_get_channel_layout_nb_channels(channel) != 1) - return AVERROR(EINVAL); - channel_layout &= channel - 1; - return av_get_channel_layout_nb_channels(channel_layout); -} - -const char *av_get_channel_name(uint64_t channel) -{ - int i; - if (av_get_channel_layout_nb_channels(channel) != 1) - return NULL; - for (i = 0; i < 64; i++) - if ((1ULL<<i) & channel) - return get_channel_name(i); - return NULL; -} - -uint64_t av_channel_layout_extract_channel(uint64_t channel_layout, int index) -{ - int i; - - if (av_get_channel_layout_nb_channels(channel_layout) <= index) - return 0; - - for (i = 0; i < 64; i++) { - if ((1ULL << i) & channel_layout && !index--) - return 1ULL << i; - } - return 0; -} |