virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-23 12:43:46 +02:00
Code Issues Releases Activity

cosmetics: rename ac3 tables

Browse Source 
Originally committed as revision 11193 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Justin Ruggles 2007-12-09 03:21:33 +00:00
parent 59e6f60a99
commit 66ecf18e38
6 changed files with 55 additions and 55 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
libavcodec/ac3.c
View File

@ -72,7 +72,7 @@ void ff_ac3_bit_alloc_calc_psd(int8_t *exp, int start, int end, int16_t *psd,
for(i=j;i<end1;i++) {
/* logadd */
int adr = FFMIN(FFABS(v - psd[j]) >> 1, 255);
v = FFMAX(v, psd[j]) + ff_ac3_latab[adr];
v = FFMAX(v, psd[j]) + ff_ac3_log_add_tab[adr];
j++;
}
bndpsd[k]=v;
@ -149,7 +149,7 @@ void ff_ac3_bit_alloc_calc_mask(AC3BitAllocParameters *s, int16_t *bndpsd,
if (tmp > 0) {
excite[bin] += tmp >> 2;
}
mask[bin] = FFMAX(ff_ac3_hth[bin >> s->halfratecod][s->fscod], excite[bin]);
mask[bin] = FFMAX(ff_ac3_hearing_threshold_tab[bin >> s->halfratecod][s->fscod], excite[bin]);
}
/* delta bit allocation */
@ -187,10 +187,10 @@ void ff_ac3_bit_alloc_calc_bap(int16_t *mask, int16_t *psd, int start, int end,
j = masktab[start];
do {
v = (FFMAX(mask[j] - snroffset - floor, 0) & 0x1FE0) + floor;
end1 = FFMIN(bndtab[j] + ff_ac3_bndsz[j], end);
end1 = FFMIN(bndtab[j] + ff_ac3_critical_band_size_tab[j], end);
for (k = i; k < end1; k++) {
address = av_clip((psd[i] - v) >> 5, 0, 63);
bap[i] = ff_ac3_baptab[address];
bap[i] = ff_ac3_bap_tab[address];
i++;
}
} while (end > bndtab[j++]);
@ -231,7 +231,7 @@ void ac3_common_init(void)
l = 0;
for(i=0;i<50;i++) {
bndtab[i] = l;
v = ff_ac3_bndsz[i];
v = ff_ac3_critical_band_size_tab[i];
for(j=0;j<v;j++) masktab[k++]=i;
l += v;
}

14
libavcodec/ac3_parser.c
View File

@ -76,10 +76,10 @@ int ff_ac3_parse_header(const uint8_t buf[7], AC3HeaderInfo *hdr)
hdr->lfeon = get_bits1(&gbc);
hdr->halfratecod = FFMAX(hdr->bsid, 8) - 8;
hdr->sample_rate = ff_ac3_freqs[hdr->fscod] >> hdr->halfratecod;
hdr->bit_rate = (ff_ac3_bitratetab[hdr->frmsizecod>>1] * 1000) >> hdr->halfratecod;
hdr->channels = ff_ac3_channels[hdr->acmod] + hdr->lfeon;
hdr->frame_size = ff_ac3_frame_sizes[hdr->frmsizecod][hdr->fscod] * 2;
hdr->sample_rate = ff_ac3_sample_rate_tab[hdr->fscod] >> hdr->halfratecod;
hdr->bit_rate = (ff_ac3_bitrate_tab[hdr->frmsizecod>>1] * 1000) >> hdr->halfratecod;
hdr->channels = ff_ac3_channels_tab[hdr->acmod] + hdr->lfeon;
hdr->frame_size = ff_ac3_frame_size_tab[hdr->frmsizecod][hdr->fscod] * 2;
return 0;
}
@ -125,11 +125,11 @@ static int ac3_sync(const uint8_t *buf, int *channels, int *sample_rate,
if(fscod2 == 3)
return 0;
*sample_rate = ff_ac3_freqs[fscod2] / 2;
*sample_rate = ff_ac3_sample_rate_tab[fscod2] / 2;
} else {
numblkscod = get_bits(&bits, 2);
*sample_rate = ff_ac3_freqs[fscod];
*sample_rate = ff_ac3_sample_rate_tab[fscod];
}
acmod = get_bits(&bits, 3);
@ -137,7 +137,7 @@ static int ac3_sync(const uint8_t *buf, int *channels, int *sample_rate,
*samples = eac3_blocks[numblkscod] * 256;
*bit_rate = frmsiz * (*sample_rate) * 16 / (*samples);
*channels = ff_ac3_channels[acmod] + lfeon;
*channels = ff_ac3_channels_tab[acmod] + lfeon;
return frmsiz * 2;
}

12
libavcodec/ac3dec.c
View File

@ -947,11 +947,11 @@ static int ac3_parse_audio_block(AC3DecodeContext *ctx, int blk)
/* bit allocation information */
if (get_bits1(gb)) {
ctx->bit_alloc_params.sdecay = ff_sdecaytab[get_bits(gb, 2)] >> ctx->bit_alloc_params.halfratecod;
ctx->bit_alloc_params.fdecay = ff_fdecaytab[get_bits(gb, 2)] >> ctx->bit_alloc_params.halfratecod;
ctx->bit_alloc_params.sgain = ff_sgaintab[get_bits(gb, 2)];
ctx->bit_alloc_params.dbknee = ff_dbkneetab[get_bits(gb, 2)];
ctx->bit_alloc_params.floor = ff_floortab[get_bits(gb, 3)];
ctx->bit_alloc_params.sdecay = ff_ac3_slow_decay_tab[get_bits(gb, 2)] >> ctx->bit_alloc_params.halfratecod;
ctx->bit_alloc_params.fdecay = ff_ac3_fast_decay_tab[get_bits(gb, 2)] >> ctx->bit_alloc_params.halfratecod;
ctx->bit_alloc_params.sgain = ff_ac3_slow_gain_tab[get_bits(gb, 2)];
ctx->bit_alloc_params.dbknee = ff_ac3_db_per_bit_tab[get_bits(gb, 2)];
ctx->bit_alloc_params.floor = ff_ac3_floor_tab[get_bits(gb, 3)];
for(ch=!ctx->cplinu; ch<=ctx->nchans; ch++) {
bit_alloc_stages[ch] = FFMAX(bit_alloc_stages[ch], 2);
}
@ -963,7 +963,7 @@ static int ac3_parse_audio_block(AC3DecodeContext *ctx, int blk)
csnr = (get_bits(gb, 6) - 15) << 4;
for (ch = !ctx->cplinu; ch <= ctx->nchans; ch++) { /* snr offset and fast gain */
ctx->snroffst[ch] = (csnr + get_bits(gb, 4)) << 2;
ctx->fgain[ch] = ff_fgaintab[get_bits(gb, 3)];
ctx->fgain[ch] = ff_ac3_fast_gain_tab[get_bits(gb, 3)];
}
memset(bit_alloc_stages, 3, AC3_MAX_CHANNELS);
}

18
libavcodec/ac3enc.c
View File

@ -451,7 +451,7 @@ static void bit_alloc_masking(AC3EncodeContext *s,
psd[blk][ch], bndpsd[blk][ch]);
ff_ac3_bit_alloc_calc_mask(&s->bit_alloc, bndpsd[blk][ch],
0, s->nb_coefs[ch],
ff_fgaintab[s->fgaincod[ch]],
ff_ac3_fast_gain_tab[s->fgaincod[ch]],
ch == s->lfe_channel,
DBA_NONE, 0, NULL, NULL, NULL,
mask[blk][ch]);
@ -519,11 +519,11 @@ static int compute_bit_allocation(AC3EncodeContext *s,
/* compute real values */
s->bit_alloc.fscod = s->fscod;
s->bit_alloc.halfratecod = s->halfratecod;
s->bit_alloc.sdecay = ff_sdecaytab[s->sdecaycod] >> s->halfratecod;
s->bit_alloc.fdecay = ff_fdecaytab[s->fdecaycod] >> s->halfratecod;
s->bit_alloc.sgain = ff_sgaintab[s->sgaincod];
s->bit_alloc.dbknee = ff_dbkneetab[s->dbkneecod];
s->bit_alloc.floor = ff_floortab[s->floorcod];
s->bit_alloc.sdecay = ff_ac3_slow_decay_tab[s->sdecaycod] >> s->halfratecod;
s->bit_alloc.fdecay = ff_ac3_fast_decay_tab[s->fdecaycod] >> s->halfratecod;
s->bit_alloc.sgain = ff_ac3_slow_gain_tab[s->sgaincod];
s->bit_alloc.dbknee = ff_ac3_db_per_bit_tab[s->dbkneecod];
s->bit_alloc.floor = ff_ac3_floor_tab[s->floorcod];
/* header size */
frame_bits += 65;
@ -657,7 +657,7 @@ static int AC3_encode_init(AVCodecContext *avctx)
/* frequency */
for(i=0;i<3;i++) {
for(j=0;j<3;j++)
if ((ff_ac3_freqs[j] >> i) == freq)
if ((ff_ac3_sample_rate_tab[j] >> i) == freq)
goto found;
}
return -1;
@ -671,14 +671,14 @@ static int AC3_encode_init(AVCodecContext *avctx)
/* bitrate & frame size */
bitrate /= 1000;
for(i=0;i<19;i++) {
if ((ff_ac3_bitratetab[i] >> s->halfratecod) == bitrate)
if ((ff_ac3_bitrate_tab[i] >> s->halfratecod) == bitrate)
break;
}
if (i == 19)
return -1;
s->bit_rate = bitrate;
s->frmsizecod = i << 1;
s->frame_size_min = ff_ac3_frame_sizes[s->frmsizecod][s->fscod];
s->frame_size_min = ff_ac3_frame_size_tab[s->frmsizecod][s->fscod];
s->bits_written = 0;
s->samples_written = 0;
s->frame_size = s->frame_size_min;

28
libavcodec/ac3tab.c
View File

@ -30,7 +30,7 @@
* Possible frame sizes.
* from ATSC A/52 Table 5.18 Frame Size Code Table.
*/
const uint16_t ff_ac3_frame_sizes[38][3] = {
const uint16_t ff_ac3_frame_size_tab[38][3] = {
{ 64, 69, 96 },
{ 64, 70, 96 },
{ 80, 87, 120 },
@ -75,15 +75,15 @@ const uint16_t ff_ac3_frame_sizes[38][3] = {
* Maps audio coding mode (acmod) to number of full-bandwidth channels.
* from ATSC A/52 Table 5.8 Audio Coding Mode
*/
const uint8_t ff_ac3_channels[8] = {
const uint8_t ff_ac3_channels_tab[8] = {
2, 1, 2, 3, 3, 4, 4, 5
};
/* possible frequencies */
const uint16_t ff_ac3_freqs[3] = { 48000, 44100, 32000 };
const uint16_t ff_ac3_sample_rate_tab[3] = { 48000, 44100, 32000 };
/* possible bitrates */
const uint16_t ff_ac3_bitratetab[19] = {
const uint16_t ff_ac3_bitrate_tab[19] = {
32, 40, 48, 56, 64, 80, 96, 112, 128,
160, 192, 224, 256, 320, 384, 448, 512, 576, 640
};
@ -126,7 +126,7 @@ const int16_t ff_ac3_window[256] = {
32767,32767,32767,32767,32767,32767,32767,32767,
};
const uint8_t ff_ac3_latab[260]= {
const uint8_t ff_ac3_log_add_tab[260]= {
0x40,0x3f,0x3e,0x3d,0x3c,0x3b,0x3a,0x39,0x38,0x37,
0x36,0x35,0x34,0x34,0x33,0x32,0x31,0x30,0x2f,0x2f,
0x2e,0x2d,0x2c,0x2c,0x2b,0x2a,0x29,0x29,0x28,0x27,
@ -155,7 +155,7 @@ const uint8_t ff_ac3_latab[260]= {
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};
const uint16_t ff_ac3_hth[50][3]= {
const uint16_t ff_ac3_hearing_threshold_tab[50][3]= {
{ 0x04d0,0x04f0,0x0580 },
{ 0x04d0,0x04f0,0x0580 },
{ 0x0440,0x0460,0x04b0 },
@ -208,7 +208,7 @@ const uint16_t ff_ac3_hth[50][3]= {
{ 0x0840,0x0840,0x04e0 },
};
const uint8_t ff_ac3_baptab[64]= {
const uint8_t ff_ac3_bap_tab[64]= {
0, 1, 1, 1, 1, 1, 2, 2, 3, 3,
3, 4, 4, 5, 5, 6, 6, 6, 6, 7,
7, 7, 7, 8, 8, 8, 8, 9, 9, 9,
@ -218,31 +218,31 @@ const uint8_t ff_ac3_baptab[64]= {
15, 15, 15, 15,
};
const uint8_t ff_sdecaytab[4]={
const uint8_t ff_ac3_slow_decay_tab[4]={
0x0f, 0x11, 0x13, 0x15,
};
const uint8_t ff_fdecaytab[4]={
const uint8_t ff_ac3_fast_decay_tab[4]={
0x3f, 0x53, 0x67, 0x7b,
};
const uint16_t ff_sgaintab[4]= {
const uint16_t ff_ac3_slow_gain_tab[4]= {
0x540, 0x4d8, 0x478, 0x410,
};
const uint16_t ff_dbkneetab[4]= {
const uint16_t ff_ac3_db_per_bit_tab[4]= {
0x000, 0x700, 0x900, 0xb00,
};
const int16_t ff_floortab[8]= {
const int16_t ff_ac3_floor_tab[8]= {
0x2f0, 0x2b0, 0x270, 0x230, 0x1f0, 0x170, 0x0f0, 0xf800,
};
const uint16_t ff_fgaintab[8]= {
const uint16_t ff_ac3_fast_gain_tab[8]= {
0x080, 0x100, 0x180, 0x200, 0x280, 0x300, 0x380, 0x400,
};
const uint8_t ff_ac3_bndsz[50]={
const uint8_t ff_ac3_critical_band_size_tab[50]={
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 3, 3, 3, 3, 3,
3, 6, 6, 6, 6, 6, 6, 12, 12, 12, 12, 24, 24, 24, 24, 24

28
libavcodec/ac3tab.h
View File

@ -24,20 +24,20 @@
#include "common.h"
extern const uint16_t ff_ac3_frame_sizes[38][3];
extern const uint8_t ff_ac3_channels[8];
extern const uint16_t ff_ac3_freqs[3];
extern const uint16_t ff_ac3_bitratetab[19];
extern const uint16_t ff_ac3_frame_size_tab[38][3];
extern const uint8_t ff_ac3_channels_tab[8];
extern const uint16_t ff_ac3_sample_rate_tab[3];
extern const uint16_t ff_ac3_bitrate_tab[19];
extern const int16_t ff_ac3_window[256];
extern const uint8_t ff_ac3_latab[260];
extern const uint16_t ff_ac3_hth[50][3];
extern const uint8_t ff_ac3_baptab[64];
extern const uint8_t ff_sdecaytab[4];
extern const uint8_t ff_fdecaytab[4];
extern const uint16_t ff_sgaintab[4];
extern const uint16_t ff_dbkneetab[4];
extern const int16_t ff_floortab[8];
extern const uint16_t ff_fgaintab[8];
extern const uint8_t ff_ac3_bndsz[50];
extern const uint8_t ff_ac3_log_add_tab[260];
extern const uint16_t ff_ac3_hearing_threshold_tab[50][3];
extern const uint8_t ff_ac3_bap_tab[64];
extern const uint8_t ff_ac3_slow_decay_tab[4];
extern const uint8_t ff_ac3_fast_decay_tab[4];
extern const uint16_t ff_ac3_slow_gain_tab[4];
extern const uint16_t ff_ac3_db_per_bit_tab[4];
extern const int16_t ff_ac3_floor_tab[8];
extern const uint16_t ff_ac3_fast_gain_tab[8];
extern const uint8_t ff_ac3_critical_band_size_tab[50];
#endif /* FFMPEG_AC3TAB_H */