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Diffstat (limited to 'ffmpeg1/libavcodec/adx.h')
| -rw-r--r-- | ffmpeg1/libavcodec/adx.h | 80 |
1 files changed, 0 insertions, 80 deletions
diff --git a/ffmpeg1/libavcodec/adx.h b/ffmpeg1/libavcodec/adx.h deleted file mode 100644 index b28d09a..0000000 --- a/ffmpeg1/libavcodec/adx.h +++ /dev/null @@ -1,80 +0,0 @@ -/* - * ADX ADPCM codecs - * Copyright (c) 2001,2003 BERO - * - * 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 - */ - -/** - * @file - * SEGA CRI adx codecs. - * - * Reference documents: - * http://ku-www.ss.titech.ac.jp/~yatsushi/adx.html - * adx2wav & wav2adx http://www.geocities.co.jp/Playtown/2004/ - */ - -#ifndef AVCODEC_ADX_H -#define AVCODEC_ADX_H - -#include <stdint.h> - -#include "avcodec.h" - -typedef struct ADXChannelState { - int s1,s2; -} ADXChannelState; - -typedef struct ADXContext { - int channels; - ADXChannelState prev[2]; - int header_parsed; - int eof; - int cutoff; - int coeff[2]; -} ADXContext; - -#define COEFF_BITS 12 - -#define BLOCK_SIZE 18 -#define BLOCK_SAMPLES 32 - -/** - * Calculate LPC coefficients based on cutoff frequency and sample rate. - * - * @param cutoff cutoff frequency - * @param sample_rate sample rate - * @param bits number of bits used to quantize coefficients - * @param[out] coeff 2 quantized LPC coefficients - */ -void ff_adx_calculate_coeffs(int cutoff, int sample_rate, int bits, int *coeff); - -/** - * Decode ADX stream header. - * Sets avctx->channels and avctx->sample_rate. - * - * @param avctx codec context - * @param buf header data - * @param bufsize data size, should be at least 24 bytes - * @param[out] header_size size of ADX header - * @param[out] coeff 2 LPC coefficients, can be NULL - * @return data offset or negative error code if header is invalid - */ -int avpriv_adx_decode_header(AVCodecContext *avctx, const uint8_t *buf, - int bufsize, int *header_size, int *coeff); - -#endif /* AVCODEC_ADX_H */ |
