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91 lines
2.6 KiB
91 lines
2.6 KiB
/* Copyright (c) 2011 Xiph.Org Foundation |
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Written by Jean-Marc Valin */ |
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/* |
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Redistribution and use in source and binary forms, with or without |
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modification, are permitted provided that the following conditions |
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are met: |
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- Redistributions of source code must retain the above copyright |
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notice, this list of conditions and the following disclaimer. |
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- Redistributions in binary form must reproduce the above copyright |
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notice, this list of conditions and the following disclaimer in the |
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documentation and/or other materials provided with the distribution. |
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER |
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OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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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 "opus_multistream.h" |
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#include "opus.h" |
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#include "opus_private.h" |
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#include "stack_alloc.h" |
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#include <stdarg.h> |
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#include "float_cast.h" |
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#include "os_support.h" |
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int validate_layout(const ChannelLayout *layout) |
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{ |
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int i, max_channel; |
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max_channel = layout->nb_streams+layout->nb_coupled_streams; |
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if (max_channel>255) |
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return 0; |
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for (i=0;i<layout->nb_channels;i++) |
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{ |
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if (layout->mapping[i] >= max_channel && layout->mapping[i] != 255) |
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return 0; |
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} |
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return 1; |
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} |
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int get_left_channel(const ChannelLayout *layout, int stream_id, int prev) |
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{ |
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int i; |
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i = (prev<0) ? 0 : prev+1; |
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for (;i<layout->nb_channels;i++) |
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{ |
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if (layout->mapping[i]==stream_id*2) |
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return i; |
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} |
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return -1; |
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} |
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int get_right_channel(const ChannelLayout *layout, int stream_id, int prev) |
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{ |
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int i; |
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i = (prev<0) ? 0 : prev+1; |
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for (;i<layout->nb_channels;i++) |
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{ |
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if (layout->mapping[i]==stream_id*2+1) |
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return i; |
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} |
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return -1; |
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} |
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int get_mono_channel(const ChannelLayout *layout, int stream_id, int prev) |
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{ |
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int i; |
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i = (prev<0) ? 0 : prev+1; |
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for (;i<layout->nb_channels;i++) |
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{ |
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if (layout->mapping[i]==stream_id+layout->nb_coupled_streams) |
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return i; |
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} |
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return -1; |
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}
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