The Tor Browser / file comparison
comparison: media/libopus/src/opus_multistream.c
media/libopus/src/opus_multistream.c
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:2b81001c4db4 |
|---|---|
| 1 /* Copyright (c) 2011 Xiph.Org Foundation | |
| 2 Written by Jean-Marc Valin */ | |
| 3 /* | |
| 4 Redistribution and use in source and binary forms, with or without | |
| 5 modification, are permitted provided that the following conditions | |
| 6 are met: | |
| 7 | |
| 8 - Redistributions of source code must retain the above copyright | |
| 9 notice, this list of conditions and the following disclaimer. | |
| 10 | |
| 11 - Redistributions in binary form must reproduce the above copyright | |
| 12 notice, this list of conditions and the following disclaimer in the | |
| 13 documentation and/or other materials provided with the distribution. | |
| 14 | |
| 15 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 16 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 17 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 18 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER | |
| 19 OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 20 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 21 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| 22 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
| 23 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
| 24 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
| 25 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 26 */ | |
| 27 | |
| 28 #ifdef HAVE_CONFIG_H | |
| 29 #include "config.h" | |
| 30 #endif | |
| 31 | |
| 32 #include "opus_multistream.h" | |
| 33 #include "opus.h" | |
| 34 #include "opus_private.h" | |
| 35 #include "stack_alloc.h" | |
| 36 #include <stdarg.h> | |
| 37 #include "float_cast.h" | |
| 38 #include "os_support.h" | |
| 39 | |
| 40 | |
| 41 int validate_layout(const ChannelLayout *layout) | |
| 42 { | |
| 43 int i, max_channel; | |
| 44 | |
| 45 max_channel = layout->nb_streams+layout->nb_coupled_streams; | |
| 46 if (max_channel>255) | |
| 47 return 0; | |
| 48 for (i=0;i<layout->nb_channels;i++) | |
| 49 { | |
| 50 if (layout->mapping[i] >= max_channel && layout->mapping[i] != 255) | |
| 51 return 0; | |
| 52 } | |
| 53 return 1; | |
| 54 } | |
| 55 | |
| 56 | |
| 57 int get_left_channel(const ChannelLayout *layout, int stream_id, int prev) | |
| 58 { | |
| 59 int i; | |
| 60 i = (prev<0) ? 0 : prev+1; | |
| 61 for (;i<layout->nb_channels;i++) | |
| 62 { | |
| 63 if (layout->mapping[i]==stream_id*2) | |
| 64 return i; | |
| 65 } | |
| 66 return -1; | |
| 67 } | |
| 68 | |
| 69 int get_right_channel(const ChannelLayout *layout, int stream_id, int prev) | |
| 70 { | |
| 71 int i; | |
| 72 i = (prev<0) ? 0 : prev+1; | |
| 73 for (;i<layout->nb_channels;i++) | |
| 74 { | |
| 75 if (layout->mapping[i]==stream_id*2+1) | |
| 76 return i; | |
| 77 } | |
| 78 return -1; | |
| 79 } | |
| 80 | |
| 81 int get_mono_channel(const ChannelLayout *layout, int stream_id, int prev) | |
| 82 { | |
| 83 int i; | |
| 84 i = (prev<0) ? 0 : prev+1; | |
| 85 for (;i<layout->nb_channels;i++) | |
| 86 { | |
| 87 if (layout->mapping[i]==stream_id+layout->nb_coupled_streams) | |
| 88 return i; | |
| 89 } | |
| 90 return -1; | |
| 91 } | |
| 92 |
