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Remove unneeded fields from the decoder context

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Originally committed as revision 13163 to svn://svn.ffmpeg.org/ffmpeg/trunk
pull/126/head
Vitor Sessak 17 years ago
parent ae9b8019ec
commit bd0d10c2f1
1 changed files with 45 additions and 54 deletions
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  1. 99
      libavcodec/ra144.c

99
libavcodec/ra144.c
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@ -31,20 +31,14 @@
/* internal globals */
typedef struct {
unsigned int resetflag, val, oldval;
unsigned int gval;
unsigned short *gsp;
unsigned int oldval;
unsigned int gbuf1[8];
unsigned short gbuf2[120];
signed short output_buffer[40];
unsigned int *decptr; /* decoder ptr */
signed short *decsp;
/* the swapped buffers */
unsigned int swapb1a[10];
unsigned int swapb2a[10];
unsigned int swapb1b[10];
unsigned int swapb2b[10];
unsigned int swapbuffers[4][10];
unsigned int *swapbuf1;
unsigned int *swapbuf2;
unsigned int *swapbuf1alt;
@ -52,17 +46,9 @@ typedef struct {
unsigned int buffer[5];
unsigned short int buffer_2[148];
unsigned short int buffer_a[40];
unsigned short int buffer_b[40];
unsigned short int buffer_c[40];
unsigned short int buffer_d[40];
unsigned short int work[50];
unsigned short *sptr;
int buffer1[10];
int buffer2[10];
signed short wavtable1[2304];
unsigned short wavtable2[2304];
} Real144_internal;
@ -71,11 +57,10 @@ static int ra144_decode_init(AVCodecContext * avctx)
{
Real144_internal *glob = avctx->priv_data;
glob->resetflag = 1;
glob->swapbuf1 = glob->swapb1a;
glob->swapbuf2 = glob->swapb2a;
glob->swapbuf1alt = glob->swapb1b;
glob->swapbuf2alt = glob->swapb2b;
glob->swapbuf1 = glob->swapbuffers[0];
glob->swapbuf2 = glob->swapbuffers[1];
glob->swapbuf1alt = glob->swapbuffers[2];
glob->swapbuf2alt = glob->swapbuffers[3];
memcpy(glob->wavtable1, wavtable1, sizeof(wavtable1));
memcpy(glob->wavtable2, wavtable2, sizeof(wavtable2));
@ -123,40 +108,40 @@ static void do_voice(int *a1, int *a2)
/* do quarter-block output */
static void do_output_subblock(Real144_internal *glob, unsigned int x, GetBitContext *gb)
static void do_output_subblock(Real144_internal *glob, unsigned short *gsp, unsigned int gval, signed short *output_buffer, GetBitContext *gb)
{
unsigned short int buffer_a[40];
unsigned short int buffer_b[40];
unsigned short int buffer_c[40];
unsigned short int buffer_d[40];
int e, f, g;
int a = get_bits(gb, 7);
int d = get_bits(gb, 8);
int b = get_bits(gb, 7);
int c = get_bits(gb, 7);
if (x == 1)
memset(glob->buffer, 0, 20);
if (a) {
a += HALFBLOCK - 1;
rotate_block(glob->buffer_2, glob->buffer_a, a);
rotate_block(glob->buffer_2, buffer_a, a);
}
memcpy(glob->buffer_b, etable1 + b * BLOCKSIZE, BLOCKSIZE * 2);
e = ((ftable1[b] >> 4) *glob->gval) >> 8;
memcpy(glob->buffer_c, etable2 + c * BLOCKSIZE, BLOCKSIZE * 2);
f=((ftable2[c] >> 4) *glob->gval) >> 8;
memcpy(buffer_b, etable1 + b * BLOCKSIZE, BLOCKSIZE * 2);
e = ((ftable1[b] >> 4) * gval) >> 8;
memcpy(buffer_c, etable2 + c * BLOCKSIZE, BLOCKSIZE * 2);
f=((ftable2[c] >> 4) * gval) >> 8;
if (a)
g = irms(glob->buffer_a, glob->gval) >> 12;
g = irms(buffer_a, gval) >> 12;
else
g = 0;
add_wav(glob, d, a, g, e, f, glob->buffer_a, glob->buffer_b,
glob->buffer_c, glob->buffer_d);
add_wav(glob, d, a, g, e, f, buffer_a, buffer_b,
buffer_c, buffer_d);
memmove(glob->buffer_2, glob->buffer_2 + BLOCKSIZE, (BUFFERSIZE - BLOCKSIZE) * 2);
memcpy(glob->buffer_2 + BUFFERSIZE - BLOCKSIZE, glob->buffer_d, BLOCKSIZE * 2);
memcpy(glob->buffer_2 + BUFFERSIZE - BLOCKSIZE, buffer_d, BLOCKSIZE * 2);
final(glob,glob->gsp, glob->buffer_d, glob->output_buffer, glob->buffer,
BLOCKSIZE);
final(glob, gsp, buffer_d, output_buffer, glob->buffer, BLOCKSIZE);
}
/* rotate block */
@ -233,14 +218,15 @@ static void final(Real144_internal *glob, short *i1, short *i2, void *out,
int buffer[10];
short *ptr;
short *ptr2;
unsigned short int work[50];
memcpy(glob->work, statbuf,20);
memcpy(glob->work + 10, i2, len * 2);
memcpy(work, statbuf,20);
memcpy(work + 10, i2, len * 2);
for(i=0; i<10; i++)
buffer[9-i] = i1[i];
ptr2 = (ptr = glob->work) + len;
ptr2 = (ptr = work) + len;
while (ptr < ptr2) {
for(sum=0, x=0; x<=9; x++)
@ -320,11 +306,13 @@ static int eq(Real144_internal *glob, short *in, int *target)
short *sptr;
int *ptr1, *ptr2, *ptr3;
int *bp1, *bp2;
int buffer1[10];
int buffer2[10];
retval = 0;
bp1 = glob->buffer1;
bp2 = glob->buffer2;
ptr2 = (ptr3 = glob->buffer2) + 9;
bp1 = buffer1;
bp2 = buffer2;
ptr2 = (ptr3 = buffer2) + 9;
sptr = in;
while (ptr2 >= ptr3)
@ -416,6 +404,8 @@ static int ra144_decode_frame(AVCodecContext * avctx,
signed short *shptr;
int16_t *datao;
int16_t *data = vdata;
unsigned int val;
Real144_internal *glob = avctx->priv_data;
GetBitContext gb;
@ -432,15 +422,15 @@ static int ra144_decode_frame(AVCodecContext * avctx,
do_voice(glob->swapbuf1, glob->swapbuf2);
glob->val = decodeval[get_bits(&gb, 5) << 1]; // Useless table entries?
a = t_sqrt(glob->val*glob->oldval) >> 12;
val = decodeval[get_bits(&gb, 5) << 1]; // Useless table entries?
a = t_sqrt(val*glob->oldval) >> 12;
for (c=0; c < NBLOCKS; c++) {
if (c == (NBLOCKS - 1)) {
dec1(glob, glob->swapbuf1, glob->swapbuf2, 3, glob->val);
dec1(glob, glob->swapbuf1, glob->swapbuf2, 3, val);
} else {
if (c * 2 == (NBLOCKS - 2)) {
if (glob->oldval < glob->val) {
if (glob->oldval < val) {
dec2(glob, glob->swapbuf1, glob->swapbuf2, 3, a, glob->swapbuf2alt, c);
} else {
dec2(glob, glob->swapbuf1alt, glob->swapbuf2alt, 3, a, glob->swapbuf2, c);
@ -449,7 +439,7 @@ static int ra144_decode_frame(AVCodecContext * avctx,
if (c * 2 < (NBLOCKS - 2)) {
dec2(glob, glob->swapbuf1alt, glob->swapbuf2alt, 3, glob->oldval, glob->swapbuf2, c);
} else {
dec2(glob, glob->swapbuf1, glob->swapbuf2, 3, glob->val, glob->swapbuf2alt, c);
dec2(glob, glob->swapbuf1, glob->swapbuf2, 3, val, glob->swapbuf2alt, c);
}
}
}
@ -457,18 +447,19 @@ static int ra144_decode_frame(AVCodecContext * avctx,
/* do output */
for (b=0, c=0; c<4; c++) {
glob->gval = glob->gbuf1[c * 2];
glob->gsp = glob->gbuf2 + b;
do_output_subblock(glob, glob->resetflag, &gb);
glob->resetflag = 0;
unsigned int gval = glob->gbuf1[c * 2];
unsigned short *gsp = glob->gbuf2 + b;
signed short output_buffer[40];
do_output_subblock(glob, gsp, gval, output_buffer, &gb);
shptr = glob->output_buffer;
while (shptr < glob->output_buffer + BLOCKSIZE)
shptr = output_buffer;
while (shptr < output_buffer + BLOCKSIZE)
*data++ = av_clip_int16(*(shptr++) << 2);
b += 30;
}
glob->oldval = glob->val;
glob->oldval = val;
FFSWAP(unsigned int *, glob->swapbuf1alt, glob->swapbuf1);
FFSWAP(unsigned int *, glob->swapbuf2alt, glob->swapbuf2);

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