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Side by Side Diff: patched-ffmpeg-mt/libavcodec/imc.c

Issue 789004: ffmpeg roll of source to mar 9 version... (Closed) Base URL: svn://chrome-svn/chrome/trunk/deps/third_party/ffmpeg/
Patch Set: '' Created 10 years, 9 months ago
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1 /* 1 /*
2 * IMC compatible decoder 2 * IMC compatible decoder
3 * Copyright (c) 2002-2004 Maxim Poliakovski 3 * Copyright (c) 2002-2004 Maxim Poliakovski
4 * Copyright (c) 2006 Benjamin Larsson 4 * Copyright (c) 2006 Benjamin Larsson
5 * Copyright (c) 2006 Konstantin Shishkov 5 * Copyright (c) 2006 Konstantin Shishkov
6 * 6 *
7 * This file is part of FFmpeg. 7 * This file is part of FFmpeg.
8 * 8 *
9 * FFmpeg is free software; you can redistribute it and/or 9 * FFmpeg is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public 10 * modify it under the terms of the GNU Lesser General Public
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31 31
32 32
33 #include <math.h> 33 #include <math.h>
34 #include <stddef.h> 34 #include <stddef.h>
35 #include <stdio.h> 35 #include <stdio.h>
36 36
37 #define ALT_BITSTREAM_READER 37 #define ALT_BITSTREAM_READER
38 #include "avcodec.h" 38 #include "avcodec.h"
39 #include "get_bits.h" 39 #include "get_bits.h"
40 #include "dsputil.h" 40 #include "dsputil.h"
41 #include "fft.h"
41 42
42 #include "imcdata.h" 43 #include "imcdata.h"
43 44
44 #define IMC_BLOCK_SIZE 64 45 #define IMC_BLOCK_SIZE 64
45 #define IMC_FRAME_ID 0x21 46 #define IMC_FRAME_ID 0x21
46 #define BANDS 32 47 #define BANDS 32
47 #define COEFFS 256 48 #define COEFFS 256
48 49
49 typedef struct { 50 typedef struct {
50 float old_floor[BANDS]; 51 float old_floor[BANDS];
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77 int skipFlagCount[BANDS]; ///< skipped coeffients per band 78 int skipFlagCount[BANDS]; ///< skipped coeffients per band
78 int skipFlags[COEFFS]; ///< skip coefficient decoding or not 79 int skipFlags[COEFFS]; ///< skip coefficient decoding or not
79 int codewords[COEFFS]; ///< raw codewords read from bitstream 80 int codewords[COEFFS]; ///< raw codewords read from bitstream
80 float sqrt_tab[30]; 81 float sqrt_tab[30];
81 GetBitContext gb; 82 GetBitContext gb;
82 int decoder_reset; 83 int decoder_reset;
83 float one_div_log2; 84 float one_div_log2;
84 85
85 DSPContext dsp; 86 DSPContext dsp;
86 FFTContext fft; 87 FFTContext fft;
87 DECLARE_ALIGNED_16(FFTComplex, samples)[COEFFS/2]; 88 DECLARE_ALIGNED(16, FFTComplex, samples)[COEFFS/2];
88 DECLARE_ALIGNED_16(float, out_samples)[COEFFS]; 89 DECLARE_ALIGNED(16, float, out_samples)[COEFFS];
89 } IMCContext; 90 } IMCContext;
90 91
91 static VLC huffman_vlc[4][4]; 92 static VLC huffman_vlc[4][4];
92 93
93 #define VLC_TABLES_SIZE 9512 94 #define VLC_TABLES_SIZE 9512
94 95
95 static const int vlc_offsets[17] = { 96 static const int vlc_offsets[17] = {
96 0, 640, 1156, 1732, 2308, 2852, 3396, 3924, 97 0, 640, 1156, 1732, 2308, 2852, 3396, 3924,
97 4452, 5220, 5860, 6628, 7268, 7908, 8424, 8936, VLC_TABLES_SIZE}; 98 4452, 5220, 5860, 6628, 7268, 7908, 8424, 8936, VLC_TABLES_SIZE};
98 99
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823 AVCodec imc_decoder = { 824 AVCodec imc_decoder = {
824 .name = "imc", 825 .name = "imc",
825 .type = CODEC_TYPE_AUDIO, 826 .type = CODEC_TYPE_AUDIO,
826 .id = CODEC_ID_IMC, 827 .id = CODEC_ID_IMC,
827 .priv_data_size = sizeof(IMCContext), 828 .priv_data_size = sizeof(IMCContext),
828 .init = imc_decode_init, 829 .init = imc_decode_init,
829 .close = imc_decode_close, 830 .close = imc_decode_close,
830 .decode = imc_decode_frame, 831 .decode = imc_decode_frame,
831 .long_name = NULL_IF_CONFIG_SMALL("IMC (Intel Music Coder)"), 832 .long_name = NULL_IF_CONFIG_SMALL("IMC (Intel Music Coder)"),
832 }; 833 };
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