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share sample rate and blocksize tables between the FLAC encoder and FLAC

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decoder

Originally committed as revision 18089 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Justin Ruggles 2009-03-21 01:16:38 +00:00
parent b4800b8b7d
commit d4df4e5088
5 changed files with 84 additions and 45 deletions
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16
libavcodec/Makefile
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@ -83,8 +83,8 @@ OBJS-$(CONFIG_FFV1_DECODER) += ffv1.o rangecoder.o
OBJS-$(CONFIG_FFV1_ENCODER) += ffv1.o rangecoder.o
OBJS-$(CONFIG_FFVHUFF_DECODER) += huffyuv.o
OBJS-$(CONFIG_FFVHUFF_ENCODER) += huffyuv.o
OBJS-$(CONFIG_FLAC_DECODER) += flacdec.o
OBJS-$(CONFIG_FLAC_ENCODER) += flacenc.o lpc.o
OBJS-$(CONFIG_FLAC_DECODER) += flacdec.o flacdata.o
OBJS-$(CONFIG_FLAC_ENCODER) += flacenc.o flacdata.o lpc.o
OBJS-$(CONFIG_FLASHSV_DECODER) += flashsv.o
OBJS-$(CONFIG_FLASHSV_ENCODER) += flashsvenc.o
OBJS-$(CONFIG_FLIC_DECODER) += flicvideo.o
@ -346,17 +346,17 @@ OBJS-$(CONFIG_ADPCM_YAMAHA_ENCODER) += adpcm.o
# libavformat dependencies
OBJS-$(CONFIG_EAC3_DEMUXER) += ac3_parser.o ac3tab.o aac_ac3_parser.o
OBJS-$(CONFIG_FLAC_DEMUXER) += flacdec.o
OBJS-$(CONFIG_FLAC_MUXER) += flacdec.o
OBJS-$(CONFIG_FLAC_DEMUXER) += flacdec.o flacdata.o
OBJS-$(CONFIG_FLAC_MUXER) += flacdec.o flacdata.o
OBJS-$(CONFIG_GXF_DEMUXER) += mpeg12data.o
OBJS-$(CONFIG_MATROSKA_AUDIO_MUXER) += xiph.o mpeg4audio.o flacdec.o
OBJS-$(CONFIG_MATROSKA_AUDIO_MUXER) += xiph.o mpeg4audio.o flacdec.o flacdata.o
OBJS-$(CONFIG_MATROSKA_DEMUXER) += mpeg4audio.o
OBJS-$(CONFIG_MATROSKA_MUXER) += xiph.o mpeg4audio.o flacdec.o
OBJS-$(CONFIG_MATROSKA_MUXER) += xiph.o mpeg4audio.o flacdec.o flacdata.o
OBJS-$(CONFIG_MOV_DEMUXER) += mpeg4audio.o mpegaudiodata.o
OBJS-$(CONFIG_MPEGTS_MUXER) += mpegvideo.o
OBJS-$(CONFIG_NUT_MUXER) += mpegaudiodata.o
OBJS-$(CONFIG_OGG_DEMUXER) += flacdec.o
OBJS-$(CONFIG_OGG_MUXER) += xiph.o flacdec.o
OBJS-$(CONFIG_OGG_DEMUXER) += flacdec.o flacdata.o
OBJS-$(CONFIG_OGG_MUXER) += xiph.o flacdec.o flacdata.o
OBJS-$(CONFIG_RTP_MUXER) += mpegvideo.o
# external codec libraries

33
libavcodec/flacdata.c Normal file
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@ -0,0 +1,33 @@
/*
* FLAC data
* Copyright (c) 2003 Alex Beregszaszi
*
* 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
*/
#include "internal.h"
const int ff_flac_sample_rate_table[16] =
{ 0,
88200, 176400, 192000,
8000, 16000, 22050, 24000, 32000, 44100, 48000, 96000,
0, 0, 0, 0 };
const int16_t ff_flac_blocksize_table[16] = {
0, 192, 576<<0, 576<<1, 576<<2, 576<<3, 0, 0,
256<<0, 256<<1, 256<<2, 256<<3, 256<<4, 256<<5, 256<<6, 256<<7
};

31
libavcodec/flacdata.h Normal file
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@ -0,0 +1,31 @@
/*
* FLAC data header
* Copyright (c) 2003 Alex Beregszaszi
*
* 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_FLACDATA_H
#define AVCODEC_FLACDATA_H
#include "internal.h"
extern const int ff_flac_sample_rate_table[16];
extern const int16_t ff_flac_blocksize_table[16];
#endif /* AVCODEC_FLACDATA_H */

16
libavcodec/flacdec.c
View File

@ -42,6 +42,7 @@
#include "bytestream.h"
#include "golomb.h"
#include "flac.h"
#include "flacdata.h"
#undef NDEBUG
#include <assert.h>
@ -66,20 +67,9 @@ typedef struct FLACContext {
unsigned int allocated_bitstream_size;
} FLACContext;
static const int sample_rate_table[] =
{ 0,
88200, 176400, 192000,
8000, 16000, 22050, 24000, 32000, 44100, 48000, 96000,
0, 0, 0, 0 };
static const int sample_size_table[] =
{ 0, 8, 12, 0, 16, 20, 24, 0 };
static const int blocksize_table[] = {
0, 192, 576<<0, 576<<1, 576<<2, 576<<3, 0, 0,
256<<0, 256<<1, 256<<2, 256<<3, 256<<4, 256<<5, 256<<6, 256<<7
};
static int64_t get_utf8(GetBitContext *gb)
{
int64_t val;
@ -547,7 +537,7 @@ static int decode_frame(FLACContext *s, int alloc_data_size)
else if (blocksize_code == 7)
blocksize = get_bits(&s->gb, 16)+1;
else
blocksize = blocksize_table[blocksize_code];
blocksize = ff_flac_blocksize_table[blocksize_code];
if (blocksize > s->max_blocksize) {
av_log(s->avctx, AV_LOG_ERROR, "blocksize %d > %d\n", blocksize,
@ -561,7 +551,7 @@ static int decode_frame(FLACContext *s, int alloc_data_size)
if (sample_rate_code == 0)
samplerate= s->samplerate;
else if (sample_rate_code < 12)
samplerate = sample_rate_table[sample_rate_code];
samplerate = ff_flac_sample_rate_table[sample_rate_code];
else if (sample_rate_code == 12)
samplerate = get_bits(&s->gb, 8) * 1000;
else if (sample_rate_code == 13)

33
libavcodec/flacenc.c
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@ -28,6 +28,7 @@
#include "golomb.h"
#include "lpc.h"
#include "flac.h"
#include "flacdata.h"
#define FLAC_SUBFRAME_CONSTANT 0
#define FLAC_SUBFRAME_VERBATIM 1
@ -79,12 +80,10 @@ typedef struct FlacFrame {
} FlacFrame;
typedef struct FlacEncodeContext {
FLACSTREAMINFO
PutBitContext pb;
int channels;
int samplerate;
int sr_code[2];
int min_framesize;
int max_framesize;
int max_encoded_framesize;
uint32_t frame_count;
uint64_t sample_count;
@ -96,20 +95,6 @@ typedef struct FlacEncodeContext {
struct AVMD5 *md5ctx;
} FlacEncodeContext;
static const int flac_samplerates[16] = {
0, 0, 0, 0,
8000, 16000, 22050, 24000, 32000, 44100, 48000, 96000,
0, 0, 0, 0
};
static const int flac_blocksizes[16] = {
0,
192,
576, 1152, 2304, 4608,
0, 0,
256, 512, 1024, 2048, 4096, 8192, 16384, 32768
};
/**
* Writes streaminfo metadata block to byte array
*/
@ -146,11 +131,11 @@ static int select_blocksize(int samplerate, int block_time_ms)
int blocksize;
assert(samplerate > 0);
blocksize = flac_blocksizes[1];
blocksize = ff_flac_blocksize_table[1];
target = (samplerate * block_time_ms) / 1000;
for(i=0; i<16; i++) {
if(target >= flac_blocksizes[i] && flac_blocksizes[i] > blocksize) {
blocksize = flac_blocksizes[i];
if(target >= ff_flac_blocksize_table[i] && ff_flac_blocksize_table[i] > blocksize) {
blocksize = ff_flac_blocksize_table[i];
}
}
return blocksize;
@ -181,8 +166,8 @@ static av_cold int flac_encode_init(AVCodecContext *avctx)
if(freq < 1)
return -1;
for(i=4; i<12; i++) {
if(freq == flac_samplerates[i]) {
s->samplerate = flac_samplerates[i];
if(freq == ff_flac_sample_rate_table[i]) {
s->samplerate = ff_flac_sample_rate_table[i];
s->sr_code[0] = i;
s->sr_code[1] = 0;
break;
@ -392,8 +377,8 @@ static void init_frame(FlacEncodeContext *s)
frame = &s->frame;
for(i=0; i<16; i++) {
if(s->avctx->frame_size == flac_blocksizes[i]) {
frame->blocksize = flac_blocksizes[i];
if(s->avctx->frame_size == ff_flac_blocksize_table[i]) {
frame->blocksize = ff_flac_blocksize_table[i];
frame->bs_code[0] = i;
frame->bs_code[1] = 0;
break;