mirror of
https://github.com/mpv-player/mpv
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586b75ad08
This is done in af_lavrresample now, and as part of format negotiation. Also remove the remaining reorder_channel calls. They were redundant and did nothing.
95 lines
3.3 KiB
C
95 lines
3.3 KiB
C
/*
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* common functions for reordering audio channels
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*
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* Copyright (C) 2007 Ulion <ulion A gmail P com>
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*
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* This file is part of MPlayer.
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*
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* MPlayer is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* MPlayer 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with MPlayer; if not, write to the Free Software Foundation, Inc.,
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* 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 <string.h>
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#include "audio/reorder_ch.h"
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static inline void reorder_to_planar_(void *restrict out, const void *restrict in,
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size_t size, size_t nchan, size_t nmemb)
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{
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size_t i, c;
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char *outptr = (char *) out;
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size_t instep = nchan * size;
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for (c = 0; c < nchan; ++c) {
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const char *inptr = ((const char *) in) + c * size;
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for (i = 0; i < nmemb; ++i, inptr += instep, outptr += size) {
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memcpy(outptr, inptr, size);
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}
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}
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}
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void reorder_to_planar(void *restrict out, const void *restrict in,
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size_t size, size_t nchan, size_t nmemb)
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{
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// special case for mono (nothing to do...)
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if (nchan == 1)
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memcpy(out, in, size * nchan * nmemb);
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// these calls exist to insert an inline copy of to_planar_ here with known
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// value of size to help the compiler replace the memcpy calls by mov
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// instructions
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else if (size == 1)
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reorder_to_planar_(out, in, 1, nchan, nmemb);
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else if (size == 2)
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reorder_to_planar_(out, in, 2, nchan, nmemb);
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else if (size == 4)
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reorder_to_planar_(out, in, 4, nchan, nmemb);
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// general case (calls memcpy a lot, should actually never happen, but
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// stays here for correctness purposes)
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else
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reorder_to_planar_(out, in, size, nchan, nmemb);
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}
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static inline void reorder_to_packed_(uint8_t *out, uint8_t **in,
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size_t size, size_t nchan, size_t nmemb)
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{
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size_t outstep = nchan * size;
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for (size_t c = 0; c < nchan; ++c) {
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char *outptr = out + c * size;
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char *inptr = in[c];
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for (size_t i = 0; i < nmemb; ++i, outptr += outstep, inptr += size) {
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memcpy(outptr, inptr, size);
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}
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}
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}
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// out = destination array of packed samples of given size, nmemb frames
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// in[channel] = source array of samples for the given channel
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void reorder_to_packed(uint8_t *out, uint8_t **in,
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size_t size, size_t nchan, size_t nmemb)
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{
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if (nchan == 1)
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memcpy(out, in, size * nchan * nmemb);
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// See reorder_to_planar() why this is done this way
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else if (size == 1)
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reorder_to_packed_(out, in, 1, nchan, nmemb);
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else if (size == 2)
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reorder_to_packed_(out, in, 2, nchan, nmemb);
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else if (size == 4)
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reorder_to_packed_(out, in, 4, nchan, nmemb);
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else
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reorder_to_packed_(out, in, size, nchan, nmemb);
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}
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