1885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org/* Copyright (c) 2011 Xiph.Org Foundation 2885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org Written by Jean-Marc Valin */ 3885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org/* 4885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org Redistribution and use in source and binary forms, with or without 5885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org modification, are permitted provided that the following conditions 6885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org are met: 7885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 8885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org - Redistributions of source code must retain the above copyright 9885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org notice, this list of conditions and the following disclaimer. 10885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 11885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org - Redistributions in binary form must reproduce the above copyright 12885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org notice, this list of conditions and the following disclaimer in the 13885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org documentation and/or other materials provided with the distribution. 14885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 15885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 18885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER 19885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 20885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 22885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 23885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 24885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 25885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org*/ 27885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 28885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#ifdef HAVE_CONFIG_H 29885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#include "config.h" 30885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#endif 31885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 32885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#include "opus_multistream.h" 33885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#include "opus.h" 34885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#include "opus_private.h" 35885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#include "stack_alloc.h" 36885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#include <stdarg.h> 37885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#include "float_cast.h" 38885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#include "os_support.h" 39885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 40885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 41e3ea049fcaee2247e45f0ce793d4313babb4ef69tlegrand@chromium.orgint validate_layout(const ChannelLayout *layout) 42885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org{ 43885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org int i, max_channel; 44885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 45885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org max_channel = layout->nb_streams+layout->nb_coupled_streams; 46885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if (max_channel>255) 47885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org return 0; 48885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for (i=0;i<layout->nb_channels;i++) 49885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org { 50885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if (layout->mapping[i] >= max_channel && layout->mapping[i] != 255) 51885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org return 0; 52885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 53885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org return 1; 54885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org} 55885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 56885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 57e3ea049fcaee2247e45f0ce793d4313babb4ef69tlegrand@chromium.orgint get_left_channel(const ChannelLayout *layout, int stream_id, int prev) 58885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org{ 59885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org int i; 60885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org i = (prev<0) ? 0 : prev+1; 61885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for (;i<layout->nb_channels;i++) 62885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org { 63885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if (layout->mapping[i]==stream_id*2) 64885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org return i; 65885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 66885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org return -1; 67885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org} 68885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 69e3ea049fcaee2247e45f0ce793d4313babb4ef69tlegrand@chromium.orgint get_right_channel(const ChannelLayout *layout, int stream_id, int prev) 70885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org{ 71885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org int i; 72885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org i = (prev<0) ? 0 : prev+1; 73885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for (;i<layout->nb_channels;i++) 74885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org { 75885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if (layout->mapping[i]==stream_id*2+1) 76885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org return i; 77885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 78885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org return -1; 79885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org} 80885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 81e3ea049fcaee2247e45f0ce793d4313babb4ef69tlegrand@chromium.orgint get_mono_channel(const ChannelLayout *layout, int stream_id, int prev) 82885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org{ 83885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org int i; 84885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org i = (prev<0) ? 0 : prev+1; 85885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for (;i<layout->nb_channels;i++) 86885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org { 87885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if (layout->mapping[i]==stream_id+layout->nb_coupled_streams) 88885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org return i; 89885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 90885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org return -1; 91885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org} 92885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 93