FFmpeg/libavcodec/amr.h
Michael Niedermayer c581cb4e4f Merge remote-tracking branch 'qatar/master'
* qatar/master:
  Fix even more missing includes after the common.h removal
  build: Factor out rangecoder dependencies to CONFIG_RANGECODER
  build: Factor out error resilience dependencies to CONFIG_ERROR_RESILIENCE
  x86: avcodec: Consistently name all init files
  Add more missing includes after removing the implicit common.h
  Add some more missing includes after removing the implicit common.h
  Don't include common.h from avutil.h
  rtmp: Automatically compute the hash for SWFVerification

Conflicts:
	configure
	doc/APIchanges
	doc/examples/decoding_encoding.c
	libavcodec/Makefile
	libavcodec/assdec.c
	libavcodec/audio_frame_queue.c
	libavcodec/avpacket.c
	libavcodec/dv_profile.c
	libavcodec/dwt.c
	libavcodec/libtheoraenc.c
	libavcodec/rawdec.c
	libavcodec/rv40dsp.c
	libavcodec/tiff.c
	libavcodec/tiffenc.c
	libavcodec/v210dec.h
	libavcodec/vc1dsp.c
	libavcodec/x86/Makefile
	libavfilter/asrc_anullsrc.c
	libavfilter/avfilter.c
	libavfilter/buffer.c
	libavfilter/formats.c
	libavfilter/vf_ass.c
	libavfilter/vf_drawtext.c
	libavfilter/vf_fade.c
	libavfilter/vf_select.c
	libavfilter/video.c
	libavfilter/vsrc_testsrc.c
	libavformat/version.h
	libavutil/audioconvert.c
	libavutil/error.h
	libavutil/version.h

Merged-by: Michael Niedermayer <michaelni@gmx.at>
2012-08-16 16:20:30 +02:00

71 lines
2.2 KiB
C

/*
* Shared functions between AMR codecs
*
* Copyright (c) 2010 Marcelo Galvao Povoa
*
* 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_AMR_H
#define AVCODEC_AMR_H
#include <string.h>
#include "avcodec.h"
#ifdef AMR_USE_16BIT_TABLES
#define R_TABLE_TYPE uint16_t
#else
#define R_TABLE_TYPE uint8_t
#endif
/**
* Fill the frame structure variables from bitstream by parsing the
* given reordering table that uses the following format:
*
* Each field (16 bits) in the AMR Frame is stored as:
* - one byte for the number of bits in the field
* - one byte for the field index
* - then, one byte for each bit of the field (from most-significant to least)
* of the position of that bit in the AMR frame.
*
* @param out pointer to the frame struct
* @param size the size in bytes of the frame struct
* @param data input bitstream after the frame header
* @param ord_table the reordering table as above
*/
static inline void ff_amr_bit_reorder(uint16_t *out, int size,
const uint8_t *data,
const R_TABLE_TYPE *ord_table)
{
int field_size;
memset(out, 0, size);
while ((field_size = *ord_table++)) {
int field = 0;
int field_offset = *ord_table++;
while (field_size--) {
int bit = *ord_table++;
field <<= 1;
field |= data[bit >> 3] >> (bit & 7) & 1;
}
out[field_offset >> 1] = field;
}
}
#endif /* AVCODEC_AMR_H */