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Diffstat (limited to 'ffmpeg1/libavcodec/pcm_tablegen.h')
-rw-r--r--ffmpeg1/libavcodec/pcm_tablegen.h119
1 files changed, 0 insertions, 119 deletions
diff --git a/ffmpeg1/libavcodec/pcm_tablegen.h b/ffmpeg1/libavcodec/pcm_tablegen.h
deleted file mode 100644
index 1387210..0000000
--- a/ffmpeg1/libavcodec/pcm_tablegen.h
+++ /dev/null
@@ -1,119 +0,0 @@
-/*
- * Header file for hardcoded PCM tables
- *
- * Copyright (c) 2010 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#ifndef AVCODEC_PCM_TABLEGEN_H
-#define AVCODEC_PCM_TABLEGEN_H
-
-#include <stdint.h>
-#include "libavutil/attributes.h"
-
-/* from g711.c by SUN microsystems (unrestricted use) */
-
-#define SIGN_BIT (0x80) /* Sign bit for a A-law byte. */
-#define QUANT_MASK (0xf) /* Quantization field mask. */
-#define NSEGS (8) /* Number of A-law segments. */
-#define SEG_SHIFT (4) /* Left shift for segment number. */
-#define SEG_MASK (0x70) /* Segment field mask. */
-
-#define BIAS (0x84) /* Bias for linear code. */
-
-/*
- * alaw2linear() - Convert an A-law value to 16-bit linear PCM
- *
- */
-static av_cold int alaw2linear(unsigned char a_val)
-{
- int t;
- int seg;
-
- a_val ^= 0x55;
-
- t = a_val & QUANT_MASK;
- seg = ((unsigned)a_val & SEG_MASK) >> SEG_SHIFT;
- if(seg) t= (t + t + 1 + 32) << (seg + 2);
- else t= (t + t + 1 ) << 3;
-
- return (a_val & SIGN_BIT) ? t : -t;
-}
-
-static av_cold int ulaw2linear(unsigned char u_val)
-{
- int t;
-
- /* Complement to obtain normal u-law value. */
- u_val = ~u_val;
-
- /*
- * Extract and bias the quantization bits. Then
- * shift up by the segment number and subtract out the bias.
- */
- t = ((u_val & QUANT_MASK) << 3) + BIAS;
- t <<= ((unsigned)u_val & SEG_MASK) >> SEG_SHIFT;
-
- return (u_val & SIGN_BIT) ? (BIAS - t) : (t - BIAS);
-}
-
-#if CONFIG_HARDCODED_TABLES
-#define pcm_alaw_tableinit()
-#define pcm_ulaw_tableinit()
-#include "libavcodec/pcm_tables.h"
-#else
-/* 16384 entries per table */
-static uint8_t linear_to_alaw[16384];
-static uint8_t linear_to_ulaw[16384];
-
-static av_cold void build_xlaw_table(uint8_t *linear_to_xlaw,
- int (*xlaw2linear)(unsigned char),
- int mask)
-{
- int i, j, v, v1, v2;
-
- j = 0;
- for(i=0;i<128;i++) {
- if (i != 127) {
- v1 = xlaw2linear(i ^ mask);
- v2 = xlaw2linear((i + 1) ^ mask);
- v = (v1 + v2 + 4) >> 3;
- } else {
- v = 8192;
- }
- for(;j<v;j++) {
- linear_to_xlaw[8192 + j] = (i ^ mask);
- if (j > 0)
- linear_to_xlaw[8192 - j] = (i ^ (mask ^ 0x80));
- }
- }
- linear_to_xlaw[0] = linear_to_xlaw[1];
-}
-
-static void pcm_alaw_tableinit(void)
-{
- build_xlaw_table(linear_to_alaw, alaw2linear, 0xd5);
-}
-
-static void pcm_ulaw_tableinit(void)
-{
- build_xlaw_table(linear_to_ulaw, ulaw2linear, 0xff);
-}
-#endif /* CONFIG_HARDCODED_TABLES */
-
-#endif /* AVCODEC_PCM_TABLEGEN_H */