/*
* Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * 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.
*
- * Libav is distributed in the hope that it will be useful,
+ * 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 Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avstring.h"
#include "avutil.h"
#include "channel_layout.h"
+#include "bprint.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 */
+struct channel_name {
+ const char *name;
+ const char *description;
+};
+
+static const struct channel_name 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];
+ return channel_names[channel_id].name;
}
static const struct {
} 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 },
+ { "3.1", 4, AV_CH_LAYOUT_3POINT1 },
{ "5.0", 5, AV_CH_LAYOUT_5POINT0_BACK },
- { "5.1", 6, AV_CH_LAYOUT_5POINT1 },
+ { "5.0(side)", 5, AV_CH_LAYOUT_5POINT0 },
+ { "4.1", 5, AV_CH_LAYOUT_4POINT1 },
{ "5.1", 6, AV_CH_LAYOUT_5POINT1_BACK },
+ { "5.1(side)", 6, AV_CH_LAYOUT_5POINT1 },
{ "6.0", 6, AV_CH_LAYOUT_6POINT0 },
{ "6.0(front)", 6, AV_CH_LAYOUT_6POINT0_FRONT },
{ "hexagonal", 6, AV_CH_LAYOUT_HEXAGONAL },
{ "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 },
+ { "7.1(wide-side)", 8, AV_CH_LAYOUT_7POINT1_WIDE },
{ "octagonal", 8, AV_CH_LAYOUT_OCTAGONAL },
{ "hexadecagonal", 16, AV_CH_LAYOUT_HEXADECAGONAL },
{ "downmix", 2, AV_CH_LAYOUT_STEREO_DOWNMIX, },
- { 0 }
};
static uint64_t get_channel_layout_single(const char *name, int name_len)
char *end;
int64_t layout;
- for (i = 0; i < FF_ARRAY_ELEMS(channel_layout_map) - 1; i++) {
+ for (i = 0; i < FF_ARRAY_ELEMS(channel_layout_map); 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))
+ if (channel_names[i].name &&
+ strlen(channel_names[i].name) == name_len &&
+ !memcmp(channel_names[i].name, 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'))
+
+ if ((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 layout;
}
-void av_get_channel_layout_string(char *buf, int buf_size,
- int nb_channels, uint64_t channel_layout)
+void av_bprint_channel_layout(struct AVBPrint *bp,
+ 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++)
+ for (i = 0; i < FF_ARRAY_ELEMS(channel_layout_map); 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);
+ av_bprintf(bp, "%s", channel_layout_map[i].name);
return;
}
- snprintf(buf, buf_size, "%d channels", nb_channels);
+ av_bprintf(bp, "%d channels", nb_channels);
if (channel_layout) {
int i, ch;
- av_strlcat(buf, " (", buf_size);
+ av_bprintf(bp, " (");
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);
+ av_bprintf(bp, "+");
+ av_bprintf(bp, "%s", name);
}
ch++;
}
}
- av_strlcat(buf, ")", buf_size);
+ av_bprintf(bp, ")");
}
}
+void av_get_channel_layout_string(char *buf, int buf_size,
+ int nb_channels, uint64_t channel_layout)
+{
+ AVBPrint bp;
+
+ av_bprint_init_for_buffer(&bp, buf, buf_size);
+ av_bprint_channel_layout(&bp, nb_channels, channel_layout);
+}
+
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;
- case 16: return AV_CH_LAYOUT_HEXADECAGONAL;
- default: return 0;
- }
+int64_t av_get_default_channel_layout(int nb_channels) {
+ int i;
+ for (i = 0; i < FF_ARRAY_ELEMS(channel_layout_map); i++)
+ if (nb_channels == channel_layout_map[i].nb_channels)
+ return channel_layout_map[i].layout;
+ return 0;
}
int av_get_channel_layout_channel_index(uint64_t channel_layout,
return NULL;
}
+const char *av_get_channel_description(uint64_t channel)
+{
+ int i;
+ if (av_get_channel_layout_nb_channels(channel) != 1)
+ return NULL;
+ for (i = 0; i < FF_ARRAY_ELEMS(channel_names); i++)
+ if ((1ULL<<i) & channel)
+ return channel_names[i].description;
+ return NULL;
+}
+
uint64_t av_channel_layout_extract_channel(uint64_t channel_layout, int index)
{
int i;
}
return 0;
}
+
+int av_get_standard_channel_layout(unsigned index, uint64_t *layout,
+ const char **name)
+{
+ if (index >= FF_ARRAY_ELEMS(channel_layout_map))
+ return AVERROR_EOF;
+ if (layout) *layout = channel_layout_map[index].layout;
+ if (name) *name = channel_layout_map[index].name;
+ return 0;
+}
projects / ffmpeg / blobdiff