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added initial, not-yet-functional, support for fox62 audio

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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@3827 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
melanson 2001-12-28 06:47:15 +00:00
parent 57a9da01e2
commit 296399a5bb
6 changed files with 196 additions and 4 deletions
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154
adpcm.c
View File

@ -32,13 +32,41 @@ static int adpcm_step[89] =
15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794, 32767
};
//static int fox62_step[89] =
static int fox62_step[] =
{
0x7, 0x8, 0x9, 0xa,
0xb, 0xc, 0xd, 0xf,
0x10, 0x12, 0x13, 0x15,
0x17, 0x1a, 0x1c, 0x1f,
0x22, 0x26, 0x29, 0x2e,
0x32, 0x37, 0x3d, 0x43,
0x4a, 0x51, 0x59, 0x62,
0x6c, 0x76, 0x82, 0x8f,
0x9e, 0xad, 0xbf, 0xd2,
0xe7, 0xfe, 0x117, 0x133,
0x152, 0x174, 0x199, 0x1c2,
0x1ef, 0x220, 0x256, 0x292,
0x2d4, 0x31d, 0x36c, 0x3c4,
0x424, 0x48e, 0x503, 0x583,
0x610, 0x6ac, 0x756, 0x812,
0x8e1, 0x9c4, 0xabe, 0x8d1,
0xcff, 0xe4c, 0xfba, 0x114d,
0x1308, 0x14ef, 0x1707, 0x1954,
0x1bdd, 0x1ea6, 0x21b7, 0x2516,
0x28cb, 0x2cdf, 0x315c, 0x364c,
0x3bba, 0x41b2, 0x4844, 0x4f7e,
0x5771, 0x6030, 0x69ce, 0x7463,
0x7FFF
};
static int adpcm_index[16] =
{
-1, -1, -1, -1, 2, 4, 6, 8,
-1, -1, -1, -1, 2, 4, 6, 8
};
static int format_0x62_table[16] =
static int fox62_extra_table[16] =
{
1, 3, 5, 7, 9, 11, 13, 15,
-1, -3, -5, -7, -9, -11, -13, -15
@ -269,3 +297,127 @@ int ms_adpcm_decode_block(unsigned short *output, unsigned char *input,
return MS_ADPCM_SAMPLES_PER_BLOCK * channels;
}
// note: This decoder assumes the format 0x62 data always comes in
// stereo flavor
int fox62_adpcm_decode_block(unsigned short *output, unsigned char *input,
int channels)
{
int predictor_l;
int predictor_r;
int index_l;
int index_r;
int code_l;
int code_r;
int i;
int out_ptr = 0;
int temp1, temp2, edi, eax, edx;
static int counter = 0;
predictor_l = LE_16(&input[10]);
edi = predictor_r = LE_16(&input[12]);
SE_16BIT(predictor_l);
SE_16BIT(predictor_r);
index_l = input[14];
index_r = input[15];
for (i = 16; i < FOX62_ADPCM_BLOCK_SIZE; i++)
{
code_l = input[i] & 0x0F;
code_r = input[i] >> 4;
if (counter == 0)
printf ("code_l = %02X, predictor_l = %04X, index_l = %02X\n",
code_l, predictor_l, index_l);
if (counter == 0)
printf ("code_r = %02X, predictor_r = %04X, index_r = %02X\n",
code_r, predictor_r, index_r);
// left side
if (counter == 0)
printf ("step = %04X, extra = %02X\n", fox62_step[index_l], fox62_extra_table[code_l]);
temp1 = fox62_step[index_l] * fox62_extra_table[code_l];
if (counter == 0)
printf ("temp1 (before) = %04X\n", temp1);
if (temp1 < 0)
temp1 += 7;
if (counter == 0)
printf ("temp1 (after) = %04X\n", temp1);
temp2 = predictor_l;
temp1 /= 8;
if (counter == 0)
printf ("temp1 (after div) = %04X\n", temp1);
temp2 += temp1;
if (counter == 0)
printf ("temp2 (predictor_l before clamp) = %04X\n", temp2);
CLAMP_S16(temp2);
if (counter == 0)
printf ("temp2 (predictor_l after clamp) = %04X\n", temp2);
predictor_l = temp2;
index_l += adpcm_index[code_l];
if (counter == 0)
printf ("adjusted index_l = %02X\n", index_l);
CLAMP_0_TO_88(index_l);
// right side
if (counter == 0)
printf ("step = %04X, extra = %02X\n", fox62_step[index_r], fox62_extra_table[code_r]);
temp1 = fox62_step[index_r] * fox62_extra_table[code_r];
if (counter == 0)
printf ("temp1 (before) = %04X\n", temp1);
if (temp1 < 0)
temp1 += 7;
if (counter == 0)
printf ("temp1 (after) = %04X\n", temp1);
temp2 = predictor_r;
temp1 /= 8;
if (counter == 0)
printf ("temp1 (after div) = %04X\n", temp1);
temp2 += temp1;
if (counter == 0)
printf ("temp2 (predictor_r before clamp) = %04X\n", temp2);
CLAMP_S16(temp2);
if (counter == 0)
printf ("temp2 (predictor_r after clamp) = %04X\n", temp2);
predictor_r = temp2;
index_r += adpcm_index[code_r];
if (counter == 0)
printf ("adjusted index_r = %02X\n", index_r);
CLAMP_0_TO_88(index_r);
// do the weird final output process
edi += predictor_r;
edi /= 2;
eax = predictor_l + edi;
edx = edi * 2;
if (counter == 0)
printf ("eax = %08X, edx = %08X, edi = %08X\n", eax, edx, edi);
output[out_ptr++] = eax;
predictor_l = eax;
eax -= edx;
if (counter == 0)
printf ("eax = %08X, edx = %08X, edi = %08X\n", eax, edx, edi);
// x24 += 4
output[out_ptr++] = eax;
predictor_l = eax;
eax += edi;
if (counter == 0)
printf ("eax = %08X, edx = %08X, edi = %08X\n", eax, edx, edi);
edi = predictor_r;
if (counter == 0)
printf ("eax = %08X, edx = %08X, edi = %08X\n", eax, edx, edi);
predictor_l = eax;
if (counter == 0)
printf ("L-sample = %04X, R-sample = %04X\n",
output[out_ptr-2], output[out_ptr-1]);
counter++;
}
return FOX62_ADPCM_SAMPLES_PER_BLOCK * channels;
}

16
adpcm.h
View File

@ -1,15 +1,27 @@
#ifndef ADPCM_H
#define ADPCM_H
#define IMA_ADPCM_PREAMBLE_SIZE 2
#define IMA_ADPCM_BLOCK_SIZE 0x22
#define IMA_ADPCM_SAMPLES_PER_BLOCK 0x40
#define IMA_ADPCM_SAMPLES_PER_BLOCK \
((IMA_ADPCM_BLOCK_SIZE - IMA_ADPCM_PREAMBLE_SIZE) * 2)
#define MS_ADPCM_PREAMBLE_SIZE 7
#define MS_ADPCM_BLOCK_SIZE 256
#define MS_ADPCM_SAMPLES_PER_BLOCK ((256 - 7) * 2)
#define MS_ADPCM_SAMPLES_PER_BLOCK \
((MS_ADPCM_BLOCK_SIZE - MS_ADPCM_PREAMBLE_SIZE) * 2)
// pretend there's such a thing as mono for this format
#define FOX62_ADPCM_PREAMBLE_SIZE 8
#define FOX62_ADPCM_BLOCK_SIZE 0x400
#define FOX62_ADPCM_SAMPLES_PER_BLOCK \
((FOX62_ADPCM_BLOCK_SIZE - FOX62_ADPCM_PREAMBLE_SIZE) * 2)
int ima_adpcm_decode_block(unsigned short *output, unsigned char *input,
int channels);
int ms_adpcm_decode_block(unsigned short *output, unsigned char *input,
int channels);
int fox62_adpcm_decode_block(unsigned short *output, unsigned char *input,
int channels);
#endif

1
codec-cfg.c
View File

@ -219,6 +219,7 @@ static short get_driver(char *s,int audioflag)
"liba52",
"g72x",
"imaadpcm",
"fox62adpcm",
NULL
};
static char *videodrv[] = {

1
codec-cfg.h
View File

@ -34,6 +34,7 @@
#define AFM_A52 14
#define AFM_G72X 15
#define AFM_IMAADPCM 16
#define AFM_FOX62ADPCM 17
#define VFM_MPEG 1
#define VFM_VFW 2

22
dec_audio.c
View File

@ -288,6 +288,11 @@ case AFM_MSADPCM:
sh_audio->ds->ss_div=MS_ADPCM_SAMPLES_PER_BLOCK;
sh_audio->ds->ss_mul=MS_ADPCM_BLOCK_SIZE;
break;
case AFM_FOX62ADPCM:
sh_audio->audio_out_minsize=FOX62_ADPCM_SAMPLES_PER_BLOCK * 4;
sh_audio->ds->ss_div=FOX62_ADPCM_SAMPLES_PER_BLOCK;
sh_audio->ds->ss_mul=FOX62_ADPCM_BLOCK_SIZE;
break;
case AFM_MPEG:
// MPEG Audio:
sh_audio->audio_out_minsize=4608;
@ -517,7 +522,13 @@ case AFM_MSADPCM:
sh_audio->channels=sh_audio->wf->nChannels;
sh_audio->samplerate=sh_audio->wf->nSamplesPerSec;
sh_audio->i_bps=MS_ADPCM_BLOCK_SIZE*
(sh_audio->channels*sh_audio->samplerate)/MS_ADPCM_SAMPLES_PER_BLOCK;
(sh_audio->channels*sh_audio->samplerate) / MS_ADPCM_SAMPLES_PER_BLOCK;
break;
case AFM_FOX62ADPCM:
sh_audio->channels=sh_audio->wf->nChannels;
sh_audio->samplerate=sh_audio->wf->nSamplesPerSec;
sh_audio->i_bps=FOX62_ADPCM_BLOCK_SIZE*
(sh_audio->channels*sh_audio->samplerate) / FOX62_ADPCM_SAMPLES_PER_BLOCK;
break;
case AFM_MPEG: {
// MPEG Audio:
@ -931,6 +942,15 @@ int decode_audio(sh_audio_t *sh_audio,unsigned char *buf,int minlen,int maxlen){
len=2*ms_adpcm_decode_block((unsigned short*)buf,ibuf, sh_audio->wf->nChannels);
break;
}
case AFM_FOX62ADPCM:
{ unsigned char ibuf[FOX62_ADPCM_BLOCK_SIZE * 2]; // bytes / stereo frame
if (demux_read_data(sh_audio->ds, ibuf,
FOX62_ADPCM_BLOCK_SIZE * sh_audio->wf->nChannels) !=
FOX62_ADPCM_BLOCK_SIZE * sh_audio->wf->nChannels)
break; // EOF
len=2*fox62_adpcm_decode_block((unsigned short*)buf,ibuf, sh_audio->wf->nChannels);
break;
}
case AFM_AC3: // AC3 decoder
//printf("{1:%d}",avi_header.idx_pos);fflush(stdout);
if(!sh_audio->ac3_frame) sh_audio->ac3_frame=ac3_decode_frame();

6
etc/codecs.conf
View File

@ -330,6 +330,12 @@ audiocodec msadpcm
format 0x2
driver msadpcm
audiocodec fox62adpcm
info "Format 0x62 ADPCM"
status working
format 0x62
driver fox62adpcm
; =============== WINDOWS DLL's ==============
videocodec vp3