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224 lines
4.9 KiB
C
224 lines
4.9 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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, 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 <string.h>
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#include "gstvorbisdeclib.h"
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#include "gstvorbiscommon.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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static void
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copy_samples_m (vorbis_sample_t * out, vorbis_sample_t ** in, guint samples,
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gint channels)
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{
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memcpy (out, in[0], samples * sizeof (float));
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}
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static void
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copy_samples_s (vorbis_sample_t * out, vorbis_sample_t ** in, guint samples,
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gint channels)
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{
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#ifdef GST_VORBIS_DEC_SEQUENTIAL
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memcpy (out, in[0], samples * sizeof (float));
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out += samples;
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memcpy (out, in[1], samples * sizeof (float));
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#else
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gint j;
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for (j = 0; j < samples; j++) {
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*out++ = in[0][j];
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*out++ = in[1][j];
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}
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#endif
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}
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static void
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copy_samples (vorbis_sample_t * out, vorbis_sample_t ** in, guint samples,
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gint channels)
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{
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#ifdef GST_VORBIS_DEC_SEQUENTIAL
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gint i;
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for (i = 0; i < channels; i++) {
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memcpy (out, in[gst_vorbis_reorder_map[channels - 1][i]],
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samples * sizeof (float));
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out += samples;
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}
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#else
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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++ = in[gst_vorbis_reorder_map[channels - 1][i]][j];
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}
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}
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#endif
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}
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static void
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copy_samples_no_reorder (vorbis_sample_t * out, vorbis_sample_t ** in,
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guint samples, gint channels)
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{
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#ifdef GST_VORBIS_DEC_SEQUENTIAL
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gint i;
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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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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++ = in[i][j];
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}
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}
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#endif
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}
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CopySampleFunc
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gst_vorbis_get_copy_sample_func (gint channels)
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{
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CopySampleFunc f = NULL;
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switch (channels) {
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case 1:
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f = copy_samples_m;
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break;
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case 2:
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f = copy_samples_s;
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break;
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case 3:
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case 4:
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case 5:
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case 6:
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case 7:
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case 8:
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f = copy_samples;
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break;
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default:
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f = copy_samples_no_reorder;
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break;
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}
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return f;
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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_16_m (vorbis_sample_t * _out, vorbis_sample_t ** _in,
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guint samples, gint channels)
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{
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gint16 *out = (gint16 *) _out;
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ogg_int32_t **in = (ogg_int32_t **) _in;
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gint j;
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for (j = 0; j < samples; j++) {
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*out++ = CLIP_TO_15 (in[0][j] >> 9);
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}
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}
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static void
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copy_samples_16_s (vorbis_sample_t * _out, vorbis_sample_t ** _in,
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guint samples, gint channels)
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{
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gint16 *out = (gint16 *) _out;
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ogg_int32_t **in = (ogg_int32_t **) _in;
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gint j;
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for (j = 0; j < samples; j++) {
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*out++ = CLIP_TO_15 (in[0][j] >> 9);
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*out++ = CLIP_TO_15 (in[1][j] >> 9);
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}
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}
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static void
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copy_samples_16 (vorbis_sample_t * _out, vorbis_sample_t ** _in, guint samples,
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gint channels)
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{
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gint16 *out = (gint16 *) _out;
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ogg_int32_t **in = (ogg_int32_t **) _in;
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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[gst_vorbis_reorder_map[channels - 1][i]][j] >> 9);
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}
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}
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}
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CopySampleFunc
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gst_vorbis_get_copy_sample_func (gint channels)
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{
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CopySampleFunc f = NULL;
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switch (channels) {
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case 1:
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f = copy_samples_16_m;
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break;
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case 2:
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f = copy_samples_16_s;
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break;
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default:
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f = copy_samples_16;
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break;
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}
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return f;
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}
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#endif
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