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445 lines
20 KiB
445 lines
20 KiB
/* |
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* Copyright (c) 2021 James Almer |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include <inttypes.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include "libavutil/bprint.h" |
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#include "libavutil/channel_layout.h" |
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#include "libavutil/error.h" |
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#include "libavutil/internal.h" |
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#include "libavutil/macros.h" |
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#include "libavutil/mem.h" |
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#define BPRINT_ARGS1(bp, ...) (bp), __VA_ARGS__ |
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#define BPRINT_ARGS0(bp, ...) __VA_ARGS__, (bp) |
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#define ORD_ARGS1(str, size, ...) (str), (size), __VA_ARGS__ |
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#define ORD_ARGS0(str, size, ...) __VA_ARGS__, (str), (size) |
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// This macro presumes the AVBPrint to have been cleared before usage. |
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#define CMP_BPRINT_AND_NONBPRINT(bp, func_name, ARG_ORDER, ...) do { \ |
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char *str; \ |
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int size; \ |
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func_name ## _bprint(BPRINT_ARGS ## ARG_ORDER((bp), __VA_ARGS__)); \ |
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if (strlen((bp)->str) != (bp)->len) { \ |
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printf("strlen of AVBPrint-string returned by "#func_name"_bprint" \ |
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" differs from AVBPrint.len: %"SIZE_SPECIFIER" vs. %u\n", \ |
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strlen((bp)->str), (bp)->len); \ |
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break; \ |
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} \ |
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size = func_name(ORD_ARGS ## ARG_ORDER(NULL, 0, __VA_ARGS__)); \ |
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if (size <= 0) { \ |
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printf(#func_name " returned %d\n", size); \ |
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break; \ |
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} \ |
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if ((bp)->len != size - 1) { \ |
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printf("Return value %d of " #func_name " inconsistent with length"\ |
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" %u obtained from corresponding bprint version\n", \ |
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size, (bp)->len); \ |
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break; \ |
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} \ |
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str = av_malloc(size); \ |
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if (!str) { \ |
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printf("string of size %d could not be allocated.\n", size); \ |
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break; \ |
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} \ |
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size = func_name(ORD_ARGS ## ARG_ORDER(str, size, __VA_ARGS__)); \ |
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if (size <= 0 || (bp)->len != size - 1) { \ |
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printf("Return value %d of " #func_name " inconsistent with length"\ |
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" %d obtained in first pass.\n", size, (bp)->len); \ |
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av_free(str); \ |
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break; \ |
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} \ |
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if (strcmp(str, (bp)->str)) { \ |
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printf("Ordinary and _bprint versions of "#func_name" disagree: " \ |
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"'%s' vs. '%s'\n", str, (bp)->str); \ |
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av_free(str); \ |
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break; \ |
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} \ |
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av_free(str); \ |
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} while (0) |
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static void channel_name(AVBPrint *bp, enum AVChannel channel) |
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{ |
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av_bprint_clear(bp); |
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CMP_BPRINT_AND_NONBPRINT(bp, av_channel_name, 1, channel); |
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} |
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static void channel_description(AVBPrint *bp, enum AVChannel channel) |
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{ |
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av_bprint_clear(bp); |
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CMP_BPRINT_AND_NONBPRINT(bp, av_channel_description, 1, channel); |
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} |
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static void channel_layout_from_mask(AVChannelLayout *layout, |
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AVBPrint *bp, uint64_t channel_layout) |
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{ |
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av_channel_layout_uninit(layout); |
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av_bprint_clear(bp); |
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if (!av_channel_layout_from_mask(layout, channel_layout) && |
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av_channel_layout_check(layout)) |
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CMP_BPRINT_AND_NONBPRINT(bp, av_channel_layout_describe, 0, layout); |
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else |
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av_bprintf(bp, "fail"); |
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} |
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static void channel_layout_from_string(AVChannelLayout *layout, |
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AVBPrint *bp, const char *channel_layout) |
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{ |
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av_channel_layout_uninit(layout); |
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av_bprint_clear(bp); |
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if (!av_channel_layout_from_string(layout, channel_layout) && |
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av_channel_layout_check(layout)) |
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CMP_BPRINT_AND_NONBPRINT(bp, av_channel_layout_describe, 0, layout); |
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else |
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av_bprintf(bp, "fail"); |
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} |
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static const char* channel_order_names[] = {"UNSPEC", "NATIVE", "CUSTOM", "AMBI"}; |
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static void describe_type(AVBPrint *bp, AVChannelLayout *layout) |
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{ |
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if (layout->order >= 0 && layout->order < FF_ARRAY_ELEMS(channel_order_names)) { |
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av_bprintf(bp, "%-6s (", channel_order_names[layout->order]); |
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av_channel_layout_describe_bprint(layout, bp); |
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av_bprintf(bp, ")"); |
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} else { |
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av_bprintf(bp, "???"); |
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} |
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} |
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static const char *channel_layout_retype(AVChannelLayout *layout, AVBPrint *bp, const char *channel_layout) |
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{ |
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av_channel_layout_uninit(layout); |
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av_bprint_clear(bp); |
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if (!av_channel_layout_from_string(layout, channel_layout) && |
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av_channel_layout_check(layout)) { |
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describe_type(bp, layout); |
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for (int i = 0; i < FF_CHANNEL_ORDER_NB; i++) { |
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int ret; |
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AVChannelLayout copy = {0}; |
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av_bprintf(bp, "\n "); |
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if (av_channel_layout_copy(©, layout) < 0) |
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return "nomem"; |
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ret = av_channel_layout_retype(©, i, 0); |
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if (ret < 0 && (copy.order != layout->order || av_channel_layout_compare(©, layout))) |
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av_bprintf(bp, "failed to keep existing layout on failure"); |
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if (ret >= 0 && copy.order != i) |
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av_bprintf(bp, "returned success but did not change order"); |
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if (ret == AVERROR(ENOSYS)) { |
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av_bprintf(bp, " != %s", channel_order_names[i]); |
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} else if (ret < 0) { |
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av_bprintf(bp, "FAIL"); |
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} else { |
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av_bprintf(bp, " %s ", ret ? "~~" : "=="); |
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describe_type(bp, ©); |
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} |
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av_channel_layout_uninit(©); |
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} |
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} else { |
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av_bprintf(bp, "fail"); |
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} |
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return bp->str; |
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} |
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#define CHANNEL_NAME(x) \ |
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channel_name(&bp, (x)); \ |
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printf("With %-32s %14s\n", AV_STRINGIFY(x)":", bp.str) |
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#define CHANNEL_DESCRIPTION(x) \ |
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channel_description(&bp, (x)); \ |
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printf("With %-23s %23s\n", AV_STRINGIFY(x)":", bp.str); |
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#define CHANNEL_FROM_STRING(x) \ |
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printf("With %-38s %8d\n", AV_STRINGIFY(x)":", av_channel_from_string(x)) |
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#define CHANNEL_LAYOUT_FROM_MASK(x) \ |
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channel_layout_from_mask(&layout, &bp, (x)); |
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#define CHANNEL_LAYOUT_FROM_STRING(x) \ |
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channel_layout_from_string(&layout, &bp, (x)); \ |
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printf("With \"%s\":%*s %32s\n", x, strlen(x) > 32 ? 0 : 32 - (int)strlen(x), "", bp.str); |
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#define CHANNEL_LAYOUT_CHANNEL_FROM_INDEX(l, x) \ |
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ret = av_channel_layout_channel_from_index(&layout, x); \ |
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if (ret < 0) \ |
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ret = -1; \ |
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printf("On \"%s\" layout with %2d: %8d\n", l, x, ret) |
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#define CHANNEL_LAYOUT_SUBSET(l, xstr, x) \ |
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mask = av_channel_layout_subset(&layout, x); \ |
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printf("On \"%s\" layout with %-22s 0x%"PRIx64"\n", l, xstr, mask) |
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#define CHANNEL_LAYOUT_INDEX_FROM_CHANNEL(l, x) \ |
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ret = av_channel_layout_index_from_channel(&layout, x); \ |
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if (ret < 0) \ |
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ret = -1; \ |
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printf("On \"%s\" layout with %-23s %3d\n", l, AV_STRINGIFY(x)":", ret) |
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#define CHANNEL_LAYOUT_CHANNEL_FROM_STRING(l, x) \ |
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ret = av_channel_layout_channel_from_string(&layout, x); \ |
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if (ret < 0) \ |
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ret = -1; \ |
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printf("On \"%s\" layout with %-21s %3d\n", bp.str, AV_STRINGIFY(x)":", ret); |
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#define CHANNEL_LAYOUT_INDEX_FROM_STRING(l, x) \ |
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ret = av_channel_layout_index_from_string(&layout, x); \ |
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if (ret < 0) \ |
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ret = -1; \ |
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printf("On \"%s\" layout with %-20s %3d\n", l, AV_STRINGIFY(x)":", ret); |
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int main(void) |
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{ |
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const AVChannelLayout *playout; |
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AVChannelLayout layout = { 0 }, layout2 = { 0 }; |
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AVBPrint bp; |
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void *iter = NULL; |
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uint64_t mask; |
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int ret; |
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av_bprint_init(&bp, 64, AV_BPRINT_SIZE_AUTOMATIC); |
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printf("Testing av_channel_layout_standard\n"); |
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while (playout = av_channel_layout_standard(&iter)) { |
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av_channel_layout_describe_bprint(playout, &bp); |
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printf("%-14s ", bp.str); |
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av_bprint_clear(&bp); |
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for (int i = 0; i < 63; i++) { |
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int idx = av_channel_layout_index_from_channel(playout, i); |
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if (idx >= 0) { |
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if (idx) |
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av_bprintf(&bp, "+"); |
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av_channel_name_bprint(&bp, i); |
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} |
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} |
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printf("%s\n", bp.str); |
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av_bprint_clear(&bp); |
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} |
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printf("\nTesting av_channel_name\n"); |
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CHANNEL_NAME(AV_CHAN_FRONT_LEFT); |
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CHANNEL_NAME(AV_CHAN_FRONT_RIGHT); |
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CHANNEL_NAME(63); |
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CHANNEL_NAME(AV_CHAN_AMBISONIC_BASE); |
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CHANNEL_NAME(AV_CHAN_AMBISONIC_END); |
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printf("Testing av_channel_description\n"); |
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CHANNEL_DESCRIPTION(AV_CHAN_FRONT_LEFT); |
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CHANNEL_DESCRIPTION(AV_CHAN_FRONT_RIGHT); |
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CHANNEL_DESCRIPTION(63); |
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CHANNEL_DESCRIPTION(AV_CHAN_AMBISONIC_BASE); |
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CHANNEL_DESCRIPTION(AV_CHAN_AMBISONIC_END); |
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printf("\nTesting av_channel_from_string\n"); |
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CHANNEL_FROM_STRING("FL"); |
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CHANNEL_FROM_STRING("FR"); |
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CHANNEL_FROM_STRING("USR63"); |
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CHANNEL_FROM_STRING("AMBI0"); |
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CHANNEL_FROM_STRING("AMBI1023"); |
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CHANNEL_FROM_STRING("AMBI1024"); |
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CHANNEL_FROM_STRING("Dummy"); |
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CHANNEL_FROM_STRING("FL@Foo"); |
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CHANNEL_FROM_STRING("Foo@FL"); |
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CHANNEL_FROM_STRING("@FL"); |
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printf("\n==Native layouts==\n"); |
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printf("\nTesting av_channel_layout_from_string\n"); |
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CHANNEL_LAYOUT_FROM_STRING("0x3f"); |
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CHANNEL_LAYOUT_FROM_STRING("63"); |
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CHANNEL_LAYOUT_FROM_STRING("6c"); |
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CHANNEL_LAYOUT_FROM_STRING("6C"); |
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CHANNEL_LAYOUT_FROM_STRING("6 channels"); |
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CHANNEL_LAYOUT_FROM_STRING("6 channels (FL+FR+FC+LFE+BL+BR)"); |
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CHANNEL_LAYOUT_FROM_STRING("FL+FR+FC+LFE+BL+BR"); |
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CHANNEL_LAYOUT_FROM_STRING("5.1"); |
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CHANNEL_LAYOUT_FROM_STRING("FL+FR+USR63"); |
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CHANNEL_LAYOUT_FROM_STRING("FL+FR+FC+LFE+SL+SR"); |
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CHANNEL_LAYOUT_FROM_STRING("5.1(side)"); |
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printf("\nTesting av_channel_layout_from_mask\n"); |
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CHANNEL_LAYOUT_FROM_MASK(AV_CH_LAYOUT_5POINT1); |
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printf("With AV_CH_LAYOUT_5POINT1: %25s\n", bp.str); |
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printf("\nTesting av_channel_layout_channel_from_index\n"); |
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CHANNEL_LAYOUT_CHANNEL_FROM_INDEX(bp.str, 0); |
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CHANNEL_LAYOUT_CHANNEL_FROM_INDEX(bp.str, 1); |
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CHANNEL_LAYOUT_CHANNEL_FROM_INDEX(bp.str, 2); |
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CHANNEL_LAYOUT_CHANNEL_FROM_INDEX(bp.str, 3); |
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CHANNEL_LAYOUT_CHANNEL_FROM_INDEX(bp.str, 4); |
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CHANNEL_LAYOUT_CHANNEL_FROM_INDEX(bp.str, 5); |
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CHANNEL_LAYOUT_CHANNEL_FROM_INDEX(bp.str, 6); |
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printf("\nTesting av_channel_layout_index_from_channel\n"); |
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CHANNEL_LAYOUT_INDEX_FROM_CHANNEL(bp.str, AV_CHAN_FRONT_LEFT); |
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CHANNEL_LAYOUT_INDEX_FROM_CHANNEL(bp.str, AV_CHAN_FRONT_RIGHT); |
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CHANNEL_LAYOUT_INDEX_FROM_CHANNEL(bp.str, AV_CHAN_FRONT_CENTER); |
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CHANNEL_LAYOUT_INDEX_FROM_CHANNEL(bp.str, AV_CHAN_LOW_FREQUENCY); |
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CHANNEL_LAYOUT_INDEX_FROM_CHANNEL(bp.str, AV_CHAN_SIDE_LEFT); |
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CHANNEL_LAYOUT_INDEX_FROM_CHANNEL(bp.str, AV_CHAN_SIDE_RIGHT); |
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CHANNEL_LAYOUT_INDEX_FROM_CHANNEL(bp.str, AV_CHAN_BACK_CENTER); |
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printf("\nTesting av_channel_layout_channel_from_string\n"); |
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CHANNEL_LAYOUT_CHANNEL_FROM_STRING(bp.str, "FL"); |
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CHANNEL_LAYOUT_CHANNEL_FROM_STRING(bp.str, "FR"); |
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CHANNEL_LAYOUT_CHANNEL_FROM_STRING(bp.str, "FC"); |
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CHANNEL_LAYOUT_CHANNEL_FROM_STRING(bp.str, "LFE"); |
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CHANNEL_LAYOUT_CHANNEL_FROM_STRING(bp.str, "SL"); |
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CHANNEL_LAYOUT_CHANNEL_FROM_STRING(bp.str, "SR"); |
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CHANNEL_LAYOUT_CHANNEL_FROM_STRING(bp.str, "BC"); |
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CHANNEL_LAYOUT_CHANNEL_FROM_STRING(bp.str, "@"); |
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CHANNEL_LAYOUT_CHANNEL_FROM_STRING(bp.str, "@Foo"); |
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CHANNEL_LAYOUT_CHANNEL_FROM_STRING(bp.str, "FL@Foo"); |
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printf("\nTesting av_channel_layout_index_from_string\n"); |
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CHANNEL_LAYOUT_INDEX_FROM_STRING(bp.str, "FL"); |
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CHANNEL_LAYOUT_INDEX_FROM_STRING(bp.str, "FR"); |
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CHANNEL_LAYOUT_INDEX_FROM_STRING(bp.str, "FC"); |
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CHANNEL_LAYOUT_INDEX_FROM_STRING(bp.str, "LFE"); |
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CHANNEL_LAYOUT_INDEX_FROM_STRING(bp.str, "SL"); |
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CHANNEL_LAYOUT_INDEX_FROM_STRING(bp.str, "SR"); |
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CHANNEL_LAYOUT_INDEX_FROM_STRING(bp.str, "BC"); |
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printf("\nTesting av_channel_layout_subset\n"); |
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CHANNEL_LAYOUT_SUBSET(bp.str, "AV_CH_LAYOUT_STEREO:", AV_CH_LAYOUT_STEREO); |
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CHANNEL_LAYOUT_SUBSET(bp.str, "AV_CH_LAYOUT_2POINT1:", AV_CH_LAYOUT_2POINT1); |
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CHANNEL_LAYOUT_SUBSET(bp.str, "AV_CH_LAYOUT_4POINT1:", AV_CH_LAYOUT_4POINT1); |
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printf("\n==Custom layouts==\n"); |
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printf("\nTesting av_channel_layout_from_string\n"); |
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CHANNEL_LAYOUT_FROM_STRING("FL+FR+FC+BL+BR+LFE"); |
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CHANNEL_LAYOUT_FROM_STRING("2 channels (FR+FL)"); |
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CHANNEL_LAYOUT_FROM_STRING("2 channels (AMBI1023+FL)"); |
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CHANNEL_LAYOUT_FROM_STRING("3 channels (FR+FL)"); |
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CHANNEL_LAYOUT_FROM_STRING("-3 channels (FR+FL)"); |
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CHANNEL_LAYOUT_FROM_STRING("0 channels ()"); |
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CHANNEL_LAYOUT_FROM_STRING("2 channels (FL+FR"); |
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CHANNEL_LAYOUT_FROM_STRING("ambisonic 1+FR+FL"); |
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CHANNEL_LAYOUT_FROM_STRING("ambisonic 2+FC@Foo"); |
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CHANNEL_LAYOUT_FROM_STRING("FL@Foo+FR@Bar"); |
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CHANNEL_LAYOUT_FROM_STRING("FL+stereo"); |
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CHANNEL_LAYOUT_FROM_STRING("stereo+stereo"); |
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CHANNEL_LAYOUT_FROM_STRING("stereo@Boo"); |
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CHANNEL_LAYOUT_FROM_STRING(""); |
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CHANNEL_LAYOUT_FROM_STRING("@"); |
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CHANNEL_LAYOUT_FROM_STRING("@Dummy"); |
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CHANNEL_LAYOUT_FROM_STRING("@FL"); |
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CHANNEL_LAYOUT_FROM_STRING("Dummy"); |
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CHANNEL_LAYOUT_FROM_STRING("Dummy@FL"); |
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CHANNEL_LAYOUT_FROM_STRING("FR+Dummy"); |
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CHANNEL_LAYOUT_FROM_STRING("FR+Dummy@FL"); |
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CHANNEL_LAYOUT_FROM_STRING("UNK+UNSD"); |
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CHANNEL_LAYOUT_FROM_STRING("NONE"); |
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CHANNEL_LAYOUT_FROM_STRING("FR+@FL"); |
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CHANNEL_LAYOUT_FROM_STRING("FL+@"); |
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CHANNEL_LAYOUT_FROM_STRING("FR+FL@Foo+USR63@Foo"); |
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ret = av_channel_layout_copy(&layout2, &layout); |
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if (ret < 0) { |
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printf("Copying channel layout \"FR+FL@Foo+USR63@Foo\" failed; " |
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"ret %d\n", ret); |
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} |
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ret = av_channel_layout_compare(&layout, &layout2); |
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if (ret) |
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printf("Channel layout and its copy compare unequal; ret: %d\n", ret); |
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printf("\nTesting av_channel_layout_index_from_string\n"); |
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CHANNEL_LAYOUT_INDEX_FROM_STRING(bp.str, "FR"); |
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CHANNEL_LAYOUT_INDEX_FROM_STRING(bp.str, "FL"); |
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CHANNEL_LAYOUT_INDEX_FROM_STRING(bp.str, "USR63"); |
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CHANNEL_LAYOUT_INDEX_FROM_STRING(bp.str, "Foo"); |
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CHANNEL_LAYOUT_INDEX_FROM_STRING(bp.str, "@Foo"); |
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CHANNEL_LAYOUT_INDEX_FROM_STRING(bp.str, "FR@Foo"); |
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CHANNEL_LAYOUT_INDEX_FROM_STRING(bp.str, "FL@Foo"); |
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CHANNEL_LAYOUT_INDEX_FROM_STRING(bp.str, "USR63@Foo"); |
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CHANNEL_LAYOUT_INDEX_FROM_STRING(bp.str, "BC"); |
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printf("\nTesting av_channel_layout_channel_from_string\n"); |
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CHANNEL_LAYOUT_CHANNEL_FROM_STRING(bp.str, "FR"); |
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CHANNEL_LAYOUT_CHANNEL_FROM_STRING(bp.str, "FL"); |
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CHANNEL_LAYOUT_CHANNEL_FROM_STRING(bp.str, "USR63"); |
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CHANNEL_LAYOUT_CHANNEL_FROM_STRING(bp.str, "Foo"); |
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CHANNEL_LAYOUT_CHANNEL_FROM_STRING(bp.str, "@Foo"); |
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CHANNEL_LAYOUT_CHANNEL_FROM_STRING(bp.str, "FR@Foo"); |
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CHANNEL_LAYOUT_CHANNEL_FROM_STRING(bp.str, "FL@Foo"); |
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CHANNEL_LAYOUT_CHANNEL_FROM_STRING(bp.str, "USR63@Foo"); |
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CHANNEL_LAYOUT_CHANNEL_FROM_STRING(bp.str, "BC"); |
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printf("\nTesting av_channel_layout_index_from_channel\n"); |
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CHANNEL_LAYOUT_INDEX_FROM_CHANNEL(bp.str, AV_CHAN_FRONT_RIGHT); |
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CHANNEL_LAYOUT_INDEX_FROM_CHANNEL(bp.str, AV_CHAN_FRONT_LEFT); |
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CHANNEL_LAYOUT_INDEX_FROM_CHANNEL(bp.str, 63); |
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CHANNEL_LAYOUT_INDEX_FROM_CHANNEL(bp.str, AV_CHAN_BACK_CENTER); |
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printf("\nTesting av_channel_layout_channel_from_index\n"); |
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CHANNEL_LAYOUT_CHANNEL_FROM_INDEX(bp.str, 0); |
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CHANNEL_LAYOUT_CHANNEL_FROM_INDEX(bp.str, 1); |
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CHANNEL_LAYOUT_CHANNEL_FROM_INDEX(bp.str, 2); |
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CHANNEL_LAYOUT_CHANNEL_FROM_INDEX(bp.str, 3); |
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printf("\nTesting av_channel_layout_subset\n"); |
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CHANNEL_LAYOUT_SUBSET(bp.str, "AV_CH_LAYOUT_STEREO:", AV_CH_LAYOUT_STEREO); |
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CHANNEL_LAYOUT_SUBSET(bp.str, "AV_CH_LAYOUT_QUAD:", AV_CH_LAYOUT_QUAD); |
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printf("\n==Ambisonic layouts==\n"); |
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printf("\nTesting av_channel_layout_from_string\n"); |
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CHANNEL_LAYOUT_FROM_STRING("ambisonic 1"); |
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CHANNEL_LAYOUT_FROM_STRING("ambisonic 2+stereo"); |
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printf("\nTesting av_channel_layout_index_from_channel\n"); |
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CHANNEL_LAYOUT_INDEX_FROM_CHANNEL(bp.str, AV_CHAN_AMBISONIC_BASE); |
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CHANNEL_LAYOUT_INDEX_FROM_CHANNEL(bp.str, AV_CHAN_FRONT_LEFT); |
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CHANNEL_LAYOUT_INDEX_FROM_CHANNEL(bp.str, AV_CHAN_FRONT_RIGHT); |
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CHANNEL_LAYOUT_INDEX_FROM_CHANNEL(bp.str, AV_CHAN_BACK_CENTER); |
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printf("\nTesting av_channel_layout_channel_from_index\n"); |
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CHANNEL_LAYOUT_CHANNEL_FROM_INDEX(bp.str, 0); |
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CHANNEL_LAYOUT_CHANNEL_FROM_INDEX(bp.str, 9); |
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CHANNEL_LAYOUT_CHANNEL_FROM_INDEX(bp.str, 10); |
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CHANNEL_LAYOUT_CHANNEL_FROM_INDEX(bp.str, 11); |
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printf("\nTesting av_channel_layout_subset\n"); |
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CHANNEL_LAYOUT_SUBSET(bp.str, "AV_CH_LAYOUT_STEREO:", AV_CH_LAYOUT_STEREO); |
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CHANNEL_LAYOUT_SUBSET(bp.str, "AV_CH_LAYOUT_QUAD:", AV_CH_LAYOUT_QUAD); |
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av_channel_layout_uninit(&layout); |
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av_channel_layout_uninit(&layout2); |
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printf("\nTesting av_channel_layout_retype\n"); |
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{ |
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const char* layouts[] = { |
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"FL@Boo", |
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"stereo", |
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"FR+FL", |
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"ambisonic 2+stereo", |
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"2C", |
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NULL |
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}; |
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for (int i = 0; layouts[i]; i++) |
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printf("With \"%s\": %s\n", layouts[i], channel_layout_retype(&layout, &bp, layouts[i])); |
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} |
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av_bprint_finalize(&bp, NULL); |
|
|
|
return 0; |
|
}
|
|
|