*/
#include "avcodec.h"
+#include "bitstream.h"
#include "ra144.h"
-#define DATABLOCK1 20 /* size of 14.4 input block in bytes */
-#define DATACHUNK1 1440 /* size of 14.4 input chunk in bytes */
-#define AUDIOBLOCK 160 /* size of output block in 16-bit words (320 bytes) */
-#define AUDIOBUFFER 12288 /* size of output buffer in 16-bit words (24576 bytes) */
-/* consts */
#define NBLOCKS 4 /* number of segments within a block */
#define BLOCKSIZE 40 /* (quarter) block size in 16-bit words (80 bytes) */
#define HALFBLOCK 20 /* BLOCKSIZE/2 */
/* internal globals */
typedef struct {
- unsigned int resetflag, val, oldval;
- unsigned int unpacked[28]; /* buffer for unpacked input */
- unsigned int *iptr; /* pointer to current input (from unpacked) */
- unsigned int gval;
- unsigned short *gsp;
- unsigned int gbuf1[8];
- unsigned short gbuf2[120];
- signed short output_buffer[40];
- unsigned int *decptr; /* decoder ptr */
- signed short *decsp;
+ unsigned int old_energy; ///< previous frame energy
/* the swapped buffers */
- unsigned int swapb1a[10];
- unsigned int swapb2a[10];
- unsigned int swapb1b[10];
- unsigned int swapb2b[10];
- unsigned int *swapbuf1;
- unsigned int *swapbuf2;
- unsigned int *swapbuf1alt;
- unsigned int *swapbuf2alt;
+ unsigned int lpc_tables[2][10];
+ unsigned int *lpc_coef; ///< LPC coefficients
+ unsigned int *lpc_coef_old; ///< previous frame LPC coefficients
+ unsigned int lpc_refl_rms;
+ unsigned int lpc_refl_rms_old;
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;
+ uint16_t adapt_cb[148]; ///< adaptive codebook
+} RA144Context;
static int ra144_decode_init(AVCodecContext * avctx)
{
- Real144_internal *glob = avctx->priv_data;
+ RA144Context *ractx = avctx->priv_data;
- memset(glob, 0, sizeof(Real144_internal));
- glob->resetflag = 1;
- glob->swapbuf1 = glob->swapb1a;
- glob->swapbuf2 = glob->swapb2a;
- glob->swapbuf1alt = glob->swapb1b;
- glob->swapbuf2alt = glob->swapb2b;
-
- memcpy(glob->wavtable1, wavtable1, sizeof(wavtable1));
- memcpy(glob->wavtable2, wavtable2, sizeof(wavtable2));
+ ractx->lpc_coef = ractx->lpc_tables[0];
+ ractx->lpc_coef_old = ractx->lpc_tables[1];
return 0;
}
-static void final(Real144_internal *glob, short *i1, short *i2, void *out, int *statbuf, int len);
-static void add_wav(Real144_internal *glob, int n, int f, int m1, int m2, int m3, short *s1, short *s2, short *s3, short *dest);
-static int irms(short *data, int factor);
-static void rotate_block(short *source, short *target, int offset);
-
-/* lookup square roots in table */
+/**
+ * Evaluate sqrt(x << 24). x must fit in 20 bits. This value is evaluated in an
+ * odd way to make the output identical to the binary decoder.
+ */
static int t_sqrt(unsigned int x)
{
int s = 0;
x = x >> 2;
}
- return (sqrt_table[x] << s) << 2;
+ return (ff_sqrt(x << 20) << s) << 2;
}
-/* do 'voice' */
-static void do_voice(int *a1, int *a2)
+/**
+ * Evaluate the LPC filter coefficients from the reflection coefficients.
+ * Does the inverse of the eval_refl() function.
+ */
+static void eval_coefs(const int *refl, int *coefs)
{
int buffer[10];
- int *b1, *b2;
+ int *b1 = buffer;
+ int *b2 = coefs;
int x, y;
- int *ptr, *tmp;
-
- b1 = buffer;
- b2 = a2;
for (x=0; x < 10; x++) {
- b1[x] = (*a1) << 4;
+ b1[x] = refl[x] << 4;
- if(x > 0) {
- ptr = b2 + x;
- for (y=0; y <= x - 1; y++)
- b1[y] = (((*a1) * (*(--ptr))) >> 12) + b2[y];
- }
- tmp = b1;
- b1 = b2;
- b2 = tmp;
- a1++;
+ for (y=0; y < x; y++)
+ b1[y] = ((refl[x] * b2[x-y-1]) >> 12) + b2[y];
+
+ FFSWAP(int *, b1, b2);
}
- ptr = a2 + 10;
- while (ptr > a2)
- (*a2++) >>= 4;
+ for (x=0; x < 10; x++)
+ coefs[x] >>= 4;
}
-
-/* do quarter-block output */
-static void do_output_subblock(Real144_internal *glob, unsigned int x)
+/* rotate block */
+static void rotate_block(const int16_t *source, int16_t *target, int offset)
{
- int a, b, c, d, e, f, g;
-
- if (x == 1)
- memset(glob->buffer, 0, 20);
-
- if ((*glob->iptr) == 0)
- a = 0;
- else
- a = (*glob->iptr) + HALFBLOCK - 1;
+ int i=0, k=0;
+ source += BUFFERSIZE - offset;
- glob->iptr++;
- b = *(glob->iptr++);
- c = *(glob->iptr++);
- d = *(glob->iptr++);
+ while (i<BLOCKSIZE) {
+ target[i++] = source[k++];
- if (a)
- rotate_block(glob->buffer_2, glob->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;
-
- if (a)
- g = irms(glob->buffer_a, glob->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);
-
- memmove(glob->buffer_2, glob->buffer_2 + BLOCKSIZE, (BUFFERSIZE - BLOCKSIZE) * 2);
- memcpy(glob->buffer_2 + BUFFERSIZE - BLOCKSIZE, glob->buffer_d, BLOCKSIZE * 2);
-
- final(glob,glob->gsp, glob->buffer_d, glob->output_buffer, glob->buffer,
- BLOCKSIZE);
-}
-
-/* rotate block */
-static void rotate_block(short *source, short *target, int offset)
-{
- short *end;
- short *ptr1;
- short *ptr2;
- short *ptr3;
- ptr2 = source + BUFFERSIZE;
- ptr3 = ptr1 = ptr2 - offset;
- end = target + BLOCKSIZE;
-
- while (target < end) {
- *(target++) = *(ptr3++);
-
- if (ptr3 == ptr2)
- ptr3 = ptr1;
+ if (k == offset)
+ k = 0;
}
}
/* inverse root mean square */
-static int irms(short *data, int factor)
+static int irms(const int16_t *data, int factor)
{
- short *p1, *p2;
- unsigned int sum;
+ unsigned int i, sum = 0;
- p2 = (p1 = data) + BLOCKSIZE;
- for (sum=0; p2 > p1; p1++)
- sum += (*p1) * (*p1);
+ for (i=0; i < BLOCKSIZE; i++)
+ sum += data[i] * data[i];
if (sum == 0)
return 0; /* OOPS - division by zero */
}
/* multiply/add wavetable */
-static void add_wav(Real144_internal *glob, int n, int f, int m1, int m2,
- int m3, short *s1, short *s2, short *s3, short *dest)
+static void add_wav(int n, int skip_first, int *m, const int16_t *s1,
+ const int8_t *s2, const int8_t *s3, int16_t *dest)
{
- int a, b, c;
- short *ptr, *ptr2;
-
- ptr = glob->wavtable1 + n * 9;
- ptr2 = glob->wavtable2 + n * 9;
-
- if (f != 0)
- a = ((*ptr) * m1) >> ((*ptr2) + 1);
- else
- a = 0;
-
- ptr++;
- ptr2++;
- b = ((*ptr) * m2) >> ((*ptr2) + 1);
- ptr++;
- ptr2++;
- c = ((*ptr) * m3) >> ((*ptr2) + 1);
- ptr2 = (ptr = dest) + BLOCKSIZE;
-
- if (f != 0)
- while (ptr < ptr2)
- *(ptr++) = ((*(s1++)) * a + (*(s2++)) * b + (*(s3++)) * c) >> 12;
- else
- while (ptr < ptr2)
- *(ptr++) = ((*(s2++)) * b + (*(s3++)) * c) >> 12;
+ int i;
+ int v[3];
+
+ v[0] = 0;
+ for (i=!skip_first; i<3; i++)
+ v[i] = (wavtable1[n][i] * m[i]) >> (wavtable2[n][i] + 1);
+
+ for (i=0; i < BLOCKSIZE; i++)
+ dest[i] = ((*(s1++))*v[0] + (*(s2++))*v[1] + (*(s3++))*v[2]) >> 12;
}
-static void final(Real144_internal *glob, short *i1, short *i2, void *out,
- int *statbuf, int len)
+static void final(const int16_t *i1, const int16_t *i2,
+ void *out, int *statbuf, int len)
{
- int x, sum;
- int buffer[10];
- short *ptr;
- short *ptr2;
+ int x, i;
+ uint16_t work[50];
+ int16_t *ptr = work;
- memcpy(glob->work, statbuf,20);
- memcpy(glob->work + 10, i2, len * 2);
+ memcpy(work, statbuf,20);
+ memcpy(work + 10, i2, len * 2);
- buffer[9] = i1[0];
- buffer[8] = i1[1];
- buffer[7] = i1[2];
- buffer[6] = i1[3];
- buffer[5] = i1[4];
- buffer[4] = i1[5];
- buffer[3] = i1[6];
- buffer[2] = i1[7];
- buffer[1] = i1[8];
- buffer[0] = i1[9];
+ for (i=0; i<len; i++) {
+ int sum = 0;
+ int new_val;
- ptr2 = (ptr = glob->work) + len;
+ for(x=0; x<10; x++)
+ sum += i1[9-x] * ptr[x];
- while (ptr < ptr2) {
- for(sum=0, x=0; x<=9; x++)
- sum += buffer[x] * (ptr[x]);
+ sum >>= 12;
- sum = sum >> 12;
- x = ptr[10] - sum;
+ new_val = ptr[10] - sum;
- if (x<-32768 || x>32767) {
+ if (new_val < -32768 || new_val > 32767) {
memset(out, 0, len * 2);
memset(statbuf, 0, 20);
return;
}
- ptr[10] = x;
+ ptr[10] = new_val;
ptr++;
}
- memcpy(out, ptr+10 - len, len * 2);
- memcpy(statbuf, ptr, 20);
+
+ memcpy(out, work+10, len * 2);
+ memcpy(statbuf, work + 40, 20);
}
-/* Decode 20-byte input */
-static void unpack_input(const unsigned char *input, unsigned int *output)
+static unsigned int rescale_rms(int rms, int energy)
{
- unsigned int outbuffer[28];
- unsigned short inbuffer[10];
- unsigned int x;
- unsigned int *ptr;
-
- /* fix endianness */
- for (x=0; x<20; x+=2)
- inbuffer[x/2] = (input[x] << 8) + input[x+1];
-
- /* unpack */
- ptr=outbuffer;
- *(ptr++) = 27;
- *(ptr++) = (inbuffer[0] >> 10) & 0x3f;
- *(ptr++) = (inbuffer[0] >> 5) & 0x1f;
- *(ptr++) = inbuffer[0] & 0x1f;
- *(ptr++) = (inbuffer[1] >> 12) & 0xf;
- *(ptr++) = (inbuffer[1] >> 8) & 0xf;
- *(ptr++) = (inbuffer[1] >> 5) & 7;
- *(ptr++) = (inbuffer[1] >> 2) & 7;
- *(ptr++) = ((inbuffer[1] << 1) & 6) | ((inbuffer[2] >> 15) & 1);
- *(ptr++) = (inbuffer[2] >> 12) & 7;
- *(ptr++) = (inbuffer[2] >> 10) & 3;
- *(ptr++) = (inbuffer[2] >> 5) & 0x1f;
- *(ptr++) = ((inbuffer[2] << 2) & 0x7c) | ((inbuffer[3] >> 14) & 3);
- *(ptr++) = (inbuffer[3] >> 6) & 0xff;
- *(ptr++) = ((inbuffer[3] << 1) & 0x7e) | ((inbuffer[4] >> 15) & 1);
- *(ptr++) = (inbuffer[4] >> 8) & 0x7f;
- *(ptr++) = (inbuffer[4] >> 1) & 0x7f;
- *(ptr++) = ((inbuffer[4] << 7) & 0x80) | ((inbuffer[5] >> 9) & 0x7f);
- *(ptr++) = (inbuffer[5] >> 2) & 0x7f;
- *(ptr++) = ((inbuffer[5] << 5) & 0x60) | ((inbuffer[6] >> 11) & 0x1f);
- *(ptr++) = (inbuffer[6] >> 4) & 0x7f;
- *(ptr++) = ((inbuffer[6] << 4) & 0xf0) | ((inbuffer[7] >> 12) & 0xf);
- *(ptr++) = (inbuffer[7] >> 5) & 0x7f;
- *(ptr++) = ((inbuffer[7] << 2) & 0x7c) | ((inbuffer[8] >> 14) & 3);
- *(ptr++) = (inbuffer[8] >> 7) & 0x7f;
- *(ptr++) = ((inbuffer[8] << 1) & 0xfe) | ((inbuffer[9] >> 15) & 1);
- *(ptr++) = (inbuffer[9] >> 8) & 0x7f;
- *(ptr++) = (inbuffer[9] >> 1) & 0x7f;
-
- *(output++) = outbuffer[11];
- for (x=1; x<11; *(output++) = outbuffer[x++]);
- ptr = outbuffer+12;
- for (x=0; x<16; x+=4) {
- *(output++) = ptr[x];
- *(output++) = ptr[x+2];
- *(output++) = ptr[x+3];
- *(output++) = ptr[x+1];
- }
+ return (rms * energy) >> 10;
}
-static unsigned int rms(int *data, int f)
+static unsigned int rms(const int *data)
{
- int *c;
int x;
- unsigned int res;
- int b;
+ unsigned int res = 0x10000;
+ int b = 0;
- c = data;
- b = 0;
- res = 0x10000;
for (x=0; x<10; x++) {
- res = (((0x1000000 - (*c) * (*c)) >> 12) * res) >> 12;
+ res = (((0x1000000 - (*data) * (*data)) >> 12) * res) >> 12;
if (res == 0)
return 0;
- if (res <= 0x3fff) {
- while (res <= 0x3fff) {
- b++;
- res <<= 2;
- }
- } else {
- if (res > 0x10000)
- return 0; /* We're screwed, might as well go out with a bang. :P */
+ while (res <= 0x3fff) {
+ b++;
+ res <<= 2;
}
- c++;
+ data++;
}
if (res > 0)
res = t_sqrt(res);
res >>= (b + 10);
- res = (res * f) >> 10;
return res;
}
-static void dec1(Real144_internal *glob, int *data, int *inp, int n, int f)
+/* do quarter-block output */
+static void do_output_subblock(RA144Context *ractx,
+ const uint16_t *lpc_coefs, unsigned int gval,
+ int16_t *output_buffer, GetBitContext *gb)
{
- short *ptr,*end;
+ uint16_t buffer_a[40];
+ uint16_t *block;
+ int cba_idx = get_bits(gb, 7); // index of the adaptive CB, 0 if none
+ int gain = get_bits(gb, 8);
+ int cb1_idx = get_bits(gb, 7);
+ int cb2_idx = get_bits(gb, 7);
+ int m[3];
+
+ if (cba_idx) {
+ cba_idx += HALFBLOCK - 1;
+ rotate_block(ractx->adapt_cb, buffer_a, cba_idx);
+ m[0] = irms(buffer_a, gval) >> 12;
+ } else {
+ m[0] = 0;
+ }
+
+ m[1] = ((ftable1[cb1_idx] >> 4) * gval) >> 8;
+ m[2] = ((ftable2[cb2_idx] >> 4) * gval) >> 8;
+
+ memmove(ractx->adapt_cb, ractx->adapt_cb + BLOCKSIZE,
+ (BUFFERSIZE - BLOCKSIZE) * 2);
- *(glob->decptr++) = rms(data, f);
- glob->decptr++;
- end = (ptr = glob->decsp) + (n * 10);
+ block = ractx->adapt_cb + BUFFERSIZE - BLOCKSIZE;
- while (ptr < end)
- *(ptr++) = *(inp++);
+ add_wav(gain, cba_idx, m, buffer_a, etable1[cb1_idx], etable2[cb2_idx],
+ block);
+
+ final(lpc_coefs, block, output_buffer, ractx->buffer, BLOCKSIZE);
}
-static int eq(Real144_internal *glob, short *in, int *target)
+static void int_to_int16(int16_t *decsp, const int *inp)
{
- int retval;
- int a;
- int b;
- int c;
- unsigned int u;
- short *sptr;
- int *ptr1, *ptr2, *ptr3;
- int *bp1, *bp2, *temp;
+ int i;
- retval = 0;
- bp1 = glob->buffer1;
- bp2 = glob->buffer2;
- ptr2 = (ptr3 = glob->buffer2) + 9;
- sptr = in;
+ for (i=0; i<30; i++)
+ *(decsp++) = *(inp++);
+}
- while (ptr2 >= ptr3)
- *(ptr3++) = *(sptr++);
+/**
+ * Evaluate the reflection coefficients from the filter coefficients.
+ * Does the inverse of the eval_coefs() function.
+ *
+ * @return 1 if one of the reflection coefficients is of magnitude greater than
+ * 4095, 0 if not.
+ */
+static int eval_refl(const int16_t *coefs, int *refl, RA144Context *ractx)
+{
+ int retval = 0;
+ int b, c, i;
+ unsigned int u;
+ int buffer1[10];
+ int buffer2[10];
+ int *bp1 = buffer1;
+ int *bp2 = buffer2;
- target += 9;
- a = bp2[9];
- *target = a;
+ for (i=0; i < 10; i++)
+ buffer2[i] = coefs[i];
- if (a + 0x1000 > 0x1fff)
- return 0; /* We're screwed, might as well go out with a bang. :P */
+ u = refl[9] = bp2[9];
- c = 8;
- u = a;
+ if (u + 0x1000 > 0x1fff) {
+ av_log(ractx, AV_LOG_ERROR, "Overflow. Broken sample?\n");
+ return 0;
+ }
- while (c >= 0) {
+ for (c=8; c >= 0; c--) {
if (u == 0x1000)
u++;
if (b == 0)
b++;
- ptr2 = bp1;
- ptr1 = (ptr3 = bp2) + c;
-
for (u=0; u<=c; u++)
- *(ptr2++) = ((*(ptr3++) - (((*target) * (*(ptr1--))) >> 12)) * (0x1000000 / b)) >> 12;
+ bp1[u] = ((bp2[u] - ((refl[c+1] * bp2[c-u]) >> 12)) * (0x1000000 / b)) >> 12;
- *(--target) = u = bp1[(c--)];
+ refl[c] = u = bp1[c];
if ((u + 0x1000) > 0x1fff)
retval = 1;
- temp = bp2;
- bp2 = bp1;
- bp1 = temp;
+ FFSWAP(int *, bp1, bp2);
}
return retval;
}
-static void dec2(Real144_internal *glob, int *data, int *inp, int n, int f,
- int *inp2, int l)
+static int interp(RA144Context *ractx, int16_t *decsp, int block_num,
+ int copynew, int energy)
{
- unsigned int *ptr1,*ptr2;
int work[10];
- int a,b;
+ int a = block_num + 1;
+ int b = NBLOCKS - a;
int x;
- int result;
- if(l + 1 < NBLOCKS / 2)
- a = NBLOCKS - (l + 1);
- else
- a = l + 1;
-
- b = NBLOCKS - a;
-
- if (l == 0) {
- glob->decsp = glob->sptr = glob->gbuf2;
- glob->decptr = glob->gbuf1;
- }
- ptr1 = inp;
- ptr2 = inp2;
-
- for (x=0; x<10*n; x++)
- *(glob->sptr++) = (a * (*ptr1++) + b * (*ptr2++)) >> 2;
-
- result = eq(glob, glob->decsp, work);
-
- if (result == 1) {
- dec1(glob, data, inp, n, f);
+ // Interpolate block coefficients from the this frame forth block and
+ // last frame forth block
+ for (x=0; x<30; x++)
+ decsp[x] = (a * ractx->lpc_coef[x] + b * ractx->lpc_coef_old[x])>> 2;
+
+ if (eval_refl(decsp, work, ractx)) {
+ // The interpolated coefficients are unstable, copy either new or old
+ // coefficients
+ if (copynew) {
+ int_to_int16(decsp, ractx->lpc_coef);
+ return rescale_rms(ractx->lpc_refl_rms, energy);
+ } else {
+ int_to_int16(decsp, ractx->lpc_coef_old);
+ return rescale_rms(ractx->lpc_refl_rms_old, energy);
+ }
} else {
- *(glob->decptr++) = rms(work, f);
- glob->decptr++;
+ return rescale_rms(rms(work), energy);
}
- glob->decsp += n * 10;
}
/* Uncompress one block (20 bytes -> 160*2 bytes) */
static int ra144_decode_frame(AVCodecContext * avctx,
- void *vdata, int *data_size,
- const uint8_t * buf, int buf_size)
+ void *vdata, int *data_size,
+ const uint8_t * buf, int buf_size)
{
- unsigned int a, b, c;
- signed short *shptr;
- unsigned int *lptr, *temp;
- const short **dptr;
- int16_t *datao;
+ static const uint8_t sizes[10] = {6, 5, 5, 4, 4, 3, 3, 3, 3, 2};
+ unsigned int refl_rms[4]; // RMS of the reflection coefficients
+ uint16_t block_coefs[4][30]; // LPC coefficients of each sub-block
+ unsigned int lpc_refl[10]; // LPC reflection coefficients of the frame
+ int i, c;
int16_t *data = vdata;
- Real144_internal *glob = avctx->priv_data;
+ unsigned int energy;
- if(buf_size == 0)
- return 0;
+ RA144Context *ractx = avctx->priv_data;
+ GetBitContext gb;
- datao = data;
- unpack_input(buf, glob->unpacked);
+ if(buf_size < 20) {
+ av_log(avctx, AV_LOG_ERROR,
+ "Frame too small (%d bytes). Truncated file?\n", buf_size);
+ return buf_size;
+ }
+ init_get_bits(&gb, buf, 20 * 8);
- glob->iptr = glob->unpacked;
- glob->val = decodetable[0][(*(glob->iptr++)) << 1];
+ for (i=0; i<10; i++)
+ // "<< 1"? Doesn't this make one value out of two of the table useless?
+ lpc_refl[i] = decodetable[i][get_bits(&gb, sizes[i]) << 1];
- dptr = decodetable + 1;
- lptr = glob->swapbuf1;
+ eval_coefs(lpc_refl, ractx->lpc_coef);
+ ractx->lpc_refl_rms = rms(lpc_refl);
- while (lptr<glob->swapbuf1 + 10)
- *(lptr++) = (*(dptr++))[(*(glob->iptr++)) << 1];
+ energy = decodeval[get_bits(&gb, 5) << 1]; // Useless table entries?
- do_voice(glob->swapbuf1, glob->swapbuf2);
+ refl_rms[0] = interp(ractx, block_coefs[0], 0, 0, ractx->old_energy);
+ refl_rms[1] = interp(ractx, block_coefs[1], 1, energy > ractx->old_energy,
+ t_sqrt(energy*ractx->old_energy) >> 12);
+ refl_rms[2] = interp(ractx, block_coefs[2], 2, 1, energy);
+ refl_rms[3] = rescale_rms(ractx->lpc_refl_rms, energy);
- a = t_sqrt(glob->val*glob->oldval) >> 12;
+ int_to_int16(block_coefs[3], ractx->lpc_coef);
- for (c=0; c < NBLOCKS; c++) {
- if (c == (NBLOCKS - 1)) {
- dec1(glob, glob->swapbuf1, glob->swapbuf2, 3, glob->val);
- } else {
- if (c * 2 == (NBLOCKS - 2)) {
- if (glob->oldval < glob->val) {
- dec2(glob, glob->swapbuf1, glob->swapbuf2, 3, a, glob->swapbuf2alt, c);
- } else {
- dec2(glob, glob->swapbuf1alt, glob->swapbuf2alt, 3, a, glob->swapbuf2, c);
- }
- } else {
- 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);
- }
- }
+ /* do output */
+ for (c=0; c<4; c++) {
+ do_output_subblock(ractx, block_coefs[c], refl_rms[c], data, &gb);
+
+ for (i=0; i<BLOCKSIZE; i++) {
+ *data = av_clip_int16(*data << 2);
+ data++;
}
}
- /* 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);
- glob->resetflag = 0;
-
- shptr = glob->output_buffer;
- while (shptr < glob->output_buffer + BLOCKSIZE)
- *data++ = av_clip_int16(*(shptr++) << 2);
- b += 30;
- }
+ ractx->old_energy = energy;
+ ractx->lpc_refl_rms_old = ractx->lpc_refl_rms;
+
+ FFSWAP(unsigned int *, ractx->lpc_coef_old, ractx->lpc_coef);
- glob->oldval = glob->val;
- temp = glob->swapbuf1alt;
- glob->swapbuf1alt = glob->swapbuf1;
- glob->swapbuf1 = temp;
- temp = glob->swapbuf2alt;
- glob->swapbuf2alt = glob->swapbuf2;
- glob->swapbuf2 = temp;
- *data_size = (data-datao)*sizeof(*data);
+ *data_size = 2*160;
return 20;
}
"real_144",
CODEC_TYPE_AUDIO,
CODEC_ID_RA_144,
- sizeof(Real144_internal),
+ sizeof(RA144Context),
ra144_decode_init,
NULL,
NULL,
ra144_decode_frame,
- .long_name = "RealAudio 1.0 (14.4K)",
+ .long_name = NULL_IF_CONFIG_SMALL("RealAudio 1.0 (14.4K)"),
};
projects / ffmpeg / blobdiff