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32dff24552
... which only needs a bit of refactoring and extracting to support the minor difference in (i)vorbis interface. Fixes #609063.
122 lines
3 KiB
C
122 lines
3 KiB
C
/* GStreamer
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* Copyright (C) 2010 Mark Nauwelaerts <mark.nauwelaerts@collabora.co.uk>
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* Copyright (C) 2010 Nokia Corporation. All rights reserved.
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* Contact: Stefan Kost <stefan.kost@nokia.com>
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*
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* Tremor modifications <2006>:
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* Chris Lord, OpenedHand Ltd. <chris@openedhand.com>, http://www.o-hand.com/
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstvorbisdeclib.h"
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#ifndef TREMOR
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/* These samples can be outside of the float -1.0 -- 1.0 range, this
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* is allowed, downstream elements are supposed to clip */
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void
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copy_samples (vorbis_sample_t * out, vorbis_sample_t ** in, guint samples,
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gint channels, gint width)
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{
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gint i, j;
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g_assert (width == 4);
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#ifdef GST_VORBIS_DEC_SEQUENTIAL
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for (i = 0; i < channels; i++) {
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memcpy (out, in[i], samples * sizeof (float));
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out += samples;
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}
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#else
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for (j = 0; j < samples; j++) {
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for (i = 0; i < channels; i++) {
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*out++ = in[i][j];
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}
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}
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#endif
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}
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#else
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/* Taken from Tremor, misc.h */
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#ifdef _ARM_ASSEM_
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static inline ogg_int32_t
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CLIP_TO_15 (ogg_int32_t x)
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{
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int tmp;
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asm volatile ("subs %1, %0, #32768\n\t"
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"movpl %0, #0x7f00\n\t"
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"orrpl %0, %0, #0xff\n"
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"adds %1, %0, #32768\n\t"
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"movmi %0, #0x8000":"+r" (x), "=r" (tmp)
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::"cc");
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return (x);
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}
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#else
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static inline ogg_int32_t
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CLIP_TO_15 (ogg_int32_t x)
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{
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int ret = x;
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ret -= ((x <= 32767) - 1) & (x - 32767);
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ret -= ((x >= -32768) - 1) & (x + 32768);
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return (ret);
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}
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#endif
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static void
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copy_samples_32 (gint32 * out, ogg_int32_t ** in, guint samples, gint channels)
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{
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gint i, j;
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for (j = 0; j < samples; j++) {
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for (i = 0; i < channels; i++) {
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*out++ = CLIP_TO_15 (in[i][j] >> 9);
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}
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}
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}
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static void
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copy_samples_16 (gint16 * out, ogg_int32_t ** in, guint samples, gint channels)
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{
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gint i, j;
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for (j = 0; j < samples; j++) {
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for (i = 0; i < channels; i++) {
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*out++ = CLIP_TO_15 (in[i][j] >> 9);
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}
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}
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}
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void
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copy_samples (vorbis_sample_t * out, vorbis_sample_t ** in, guint samples,
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gint channels, gint width)
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{
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if (width == 4) {
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copy_samples_32 ((gint32 *) out, in, samples, channels);
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} else if (width == 2) {
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copy_samples_16 ((gint16 *) out, in, samples, channels);
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} else {
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g_assert_not_reached ();
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}
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}
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#endif
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