[FFmpeg-cvslog] imc: some cosmetics
Kostya Shishkov
git at videolan.org
Fri May 25 21:18:30 CEST 2012
ffmpeg | branch: master | Kostya Shishkov <kostya.shishkov at gmail.com> | Tue May 22 19:45:00 2012 +0200| [d073f122ea57ceb2ff20b24abefbc0e353d70795] | committer: Kostya Shishkov
imc: some cosmetics
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=d073f122ea57ceb2ff20b24abefbc0e353d70795
---
libavcodec/imc.c | 385 +++++++++++++++++++++++++++++-------------------------
1 file changed, 204 insertions(+), 181 deletions(-)
diff --git a/libavcodec/imc.c b/libavcodec/imc.c
index ea37139..44e15f0 100644
--- a/libavcodec/imc.c
+++ b/libavcodec/imc.c
@@ -89,7 +89,7 @@ typedef struct {
DSPContext dsp;
FFTContext fft;
- DECLARE_ALIGNED(32, FFTComplex, samples)[COEFFS/2];
+ DECLARE_ALIGNED(32, FFTComplex, samples)[COEFFS / 2];
float *out_samples;
} IMCContext;
@@ -99,11 +99,12 @@ static VLC huffman_vlc[4][4];
static const int vlc_offsets[17] = {
0, 640, 1156, 1732, 2308, 2852, 3396, 3924,
- 4452, 5220, 5860, 6628, 7268, 7908, 8424, 8936, VLC_TABLES_SIZE};
+ 4452, 5220, 5860, 6628, 7268, 7908, 8424, 8936, VLC_TABLES_SIZE
+};
static VLC_TYPE vlc_tables[VLC_TABLES_SIZE][2];
-static av_cold int imc_decode_init(AVCodecContext * avctx)
+static av_cold int imc_decode_init(AVCodecContext *avctx)
{
int i, j, ret;
IMCContext *q = avctx->priv_data;
@@ -116,27 +117,24 @@ static av_cold int imc_decode_init(AVCodecContext * avctx)
q->decoder_reset = 1;
- for(i = 0; i < BANDS; i++)
+ for (i = 0; i < BANDS; i++)
q->old_floor[i] = 1.0;
/* Build mdct window, a simple sine window normalized with sqrt(2) */
ff_sine_window_init(q->mdct_sine_window, COEFFS);
- for(i = 0; i < COEFFS; i++)
+ for (i = 0; i < COEFFS; i++)
q->mdct_sine_window[i] *= sqrt(2.0);
- for(i = 0; i < COEFFS/2; i++){
+ for (i = 0; i < COEFFS / 2; i++) {
q->post_cos[i] = (1.0f / 32768) * cos(i / 256.0 * M_PI);
q->post_sin[i] = (1.0f / 32768) * sin(i / 256.0 * M_PI);
r1 = sin((i * 4.0 + 1.0) / 1024.0 * M_PI);
r2 = cos((i * 4.0 + 1.0) / 1024.0 * M_PI);
- if (i & 0x1)
- {
+ if (i & 0x1) {
q->pre_coef1[i] = (r1 + r2) * sqrt(2.0);
q->pre_coef2[i] = -(r1 - r2) * sqrt(2.0);
- }
- else
- {
+ } else {
q->pre_coef1[i] = -(r1 + r2) * sqrt(2.0);
q->pre_coef2[i] = (r1 - r2) * sqrt(2.0);
}
@@ -146,13 +144,12 @@ static av_cold int imc_decode_init(AVCodecContext * avctx)
/* Generate a square root table */
- for(i = 0; i < 30; i++) {
+ for (i = 0; i < 30; i++)
q->sqrt_tab[i] = sqrt(i);
- }
/* initialize the VLC tables */
- for(i = 0; i < 4 ; i++) {
- for(j = 0; j < 4; j++) {
+ for (i = 0; i < 4 ; i++) {
+ for (j = 0; j < 4; j++) {
huffman_vlc[i][j].table = &vlc_tables[vlc_offsets[i * 4 + j]];
huffman_vlc[i][j].table_allocated = vlc_offsets[i * 4 + j + 1] - vlc_offsets[i * 4 + j];
init_vlc(&huffman_vlc[i][j], 9, imc_huffman_sizes[i],
@@ -160,7 +157,7 @@ static av_cold int imc_decode_init(AVCodecContext * avctx)
imc_huffman_bits[i][j], 2, 2, INIT_VLC_USE_NEW_STATIC);
}
}
- q->one_div_log2 = 1/log(2);
+ q->one_div_log2 = 1 / log(2);
if ((ret = ff_fft_init(&q->fft, 7, 1))) {
av_log(avctx, AV_LOG_INFO, "FFT init failed\n");
@@ -176,8 +173,9 @@ static av_cold int imc_decode_init(AVCodecContext * avctx)
return 0;
}
-static void imc_calculate_coeffs(IMCContext* q, float* flcoeffs1, float* flcoeffs2, int* bandWidthT,
- float* flcoeffs3, float* flcoeffs5)
+static void imc_calculate_coeffs(IMCContext *q, float *flcoeffs1,
+ float *flcoeffs2, int *bandWidthT,
+ float *flcoeffs3, float *flcoeffs5)
{
float workT1[BANDS];
float workT2[BANDS];
@@ -186,13 +184,13 @@ static void imc_calculate_coeffs(IMCContext* q, float* flcoeffs1, float* flcoeff
float accum = 0.0;
int i, cnt2;
- for(i = 0; i < BANDS; i++) {
+ for (i = 0; i < BANDS; i++) {
flcoeffs5[i] = workT2[i] = 0.0;
- if (bandWidthT[i]){
+ if (bandWidthT[i]) {
workT1[i] = flcoeffs1[i] * flcoeffs1[i];
flcoeffs3[i] = 2.0 * flcoeffs2[i];
} else {
- workT1[i] = 0.0;
+ workT1[i] = 0.0;
flcoeffs3[i] = -30000.0;
}
workT3[i] = bandWidthT[i] * workT1[i] * 0.01;
@@ -200,37 +198,38 @@ static void imc_calculate_coeffs(IMCContext* q, float* flcoeffs1, float* flcoeff
workT3[i] = 0.0;
}
- for(i = 0; i < BANDS; i++) {
- for(cnt2 = i; cnt2 < cyclTab[i]; cnt2++)
+ for (i = 0; i < BANDS; i++) {
+ for (cnt2 = i; cnt2 < cyclTab[i]; cnt2++)
flcoeffs5[cnt2] = flcoeffs5[cnt2] + workT3[i];
- workT2[cnt2-1] = workT2[cnt2-1] + workT3[i];
+ workT2[cnt2 - 1] = workT2[cnt2 - 1] + workT3[i];
}
- for(i = 1; i < BANDS; i++) {
- accum = (workT2[i-1] + accum) * imc_weights1[i-1];
+ for (i = 1; i < BANDS; i++) {
+ accum = (workT2[i - 1] + accum) * imc_weights1[i - 1];
flcoeffs5[i] += accum;
}
- for(i = 0; i < BANDS; i++)
+ for (i = 0; i < BANDS; i++)
workT2[i] = 0.0;
- for(i = 0; i < BANDS; i++) {
- for(cnt2 = i-1; cnt2 > cyclTab2[i]; cnt2--)
+ for (i = 0; i < BANDS; i++) {
+ for (cnt2 = i - 1; cnt2 > cyclTab2[i]; cnt2--)
flcoeffs5[cnt2] += workT3[i];
workT2[cnt2+1] += workT3[i];
}
accum = 0.0;
- for(i = BANDS-2; i >= 0; i--) {
+ for (i = BANDS-2; i >= 0; i--) {
accum = (workT2[i+1] + accum) * imc_weights2[i];
flcoeffs5[i] += accum;
- //there is missing code here, but it seems to never be triggered
+ // there is missing code here, but it seems to never be triggered
}
}
-static void imc_read_level_coeffs(IMCContext* q, int stream_format_code, int* levlCoeffs)
+static void imc_read_level_coeffs(IMCContext *q, int stream_format_code,
+ int *levlCoeffs)
{
int i;
VLC *hufftab[4];
@@ -245,41 +244,42 @@ static void imc_read_level_coeffs(IMCContext* q, int stream_format_code, int* le
hufftab[3] = &huffman_vlc[s][3];
cb_sel = imc_cb_select[s];
- if(stream_format_code & 4)
+ if (stream_format_code & 4)
start = 1;
- if(start)
+ if (start)
levlCoeffs[0] = get_bits(&q->gb, 7);
- for(i = start; i < BANDS; i++){
- levlCoeffs[i] = get_vlc2(&q->gb, hufftab[cb_sel[i]]->table, hufftab[cb_sel[i]]->bits, 2);
- if(levlCoeffs[i] == 17)
+ for (i = start; i < BANDS; i++) {
+ levlCoeffs[i] = get_vlc2(&q->gb, hufftab[cb_sel[i]]->table,
+ hufftab[cb_sel[i]]->bits, 2);
+ if (levlCoeffs[i] == 17)
levlCoeffs[i] += get_bits(&q->gb, 4);
}
}
-static void imc_decode_level_coefficients(IMCContext* q, int* levlCoeffBuf, float* flcoeffs1,
- float* flcoeffs2)
+static void imc_decode_level_coefficients(IMCContext *q, int *levlCoeffBuf,
+ float *flcoeffs1, float *flcoeffs2)
{
int i, level;
float tmp, tmp2;
- //maybe some frequency division thingy
+ // maybe some frequency division thingy
flcoeffs1[0] = 20000.0 / pow (2, levlCoeffBuf[0] * 0.18945); // 0.18945 = log2(10) * 0.05703125
- flcoeffs2[0] = log(flcoeffs1[0])/log(2);
- tmp = flcoeffs1[0];
+ flcoeffs2[0] = log(flcoeffs1[0]) / log(2);
+ tmp = flcoeffs1[0];
tmp2 = flcoeffs2[0];
- for(i = 1; i < BANDS; i++) {
+ for (i = 1; i < BANDS; i++) {
level = levlCoeffBuf[i];
if (level == 16) {
flcoeffs1[i] = 1.0;
flcoeffs2[i] = 0.0;
} else {
if (level < 17)
- level -=7;
+ level -= 7;
else if (level <= 24)
- level -=32;
+ level -= 32;
else
- level -=16;
+ level -= 16;
tmp *= imc_exp_tab[15 + level];
tmp2 += 0.83048 * level; // 0.83048 = log2(10) * 0.25
@@ -290,17 +290,20 @@ static void imc_decode_level_coefficients(IMCContext* q, int* levlCoeffBuf, floa
}
-static void imc_decode_level_coefficients2(IMCContext* q, int* levlCoeffBuf, float* old_floor, float* flcoeffs1,
- float* flcoeffs2) {
+static void imc_decode_level_coefficients2(IMCContext *q, int *levlCoeffBuf,
+ float *old_floor, float *flcoeffs1,
+ float *flcoeffs2)
+{
int i;
- //FIXME maybe flag_buf = noise coding and flcoeffs1 = new scale factors
- // and flcoeffs2 old scale factors
- // might be incomplete due to a missing table that is in the binary code
- for(i = 0; i < BANDS; i++) {
+ /* FIXME maybe flag_buf = noise coding and flcoeffs1 = new scale factors
+ * and flcoeffs2 old scale factors
+ * might be incomplete due to a missing table that is in the binary code
+ */
+ for (i = 0; i < BANDS; i++) {
flcoeffs1[i] = 0;
- if(levlCoeffBuf[i] < 16) {
+ if (levlCoeffBuf[i] < 16) {
flcoeffs1[i] = imc_exp_tab2[levlCoeffBuf[i]] * old_floor[i];
- flcoeffs2[i] = (levlCoeffBuf[i]-7) * 0.83048 + flcoeffs2[i]; // 0.83048 = log2(10) * 0.25
+ flcoeffs2[i] = (levlCoeffBuf[i] - 7) * 0.83048 + flcoeffs2[i]; // 0.83048 = log2(10) * 0.25
} else {
flcoeffs1[i] = old_floor[i];
}
@@ -310,7 +313,9 @@ static void imc_decode_level_coefficients2(IMCContext* q, int* levlCoeffBuf, flo
/**
* Perform bit allocation depending on bits available
*/
-static int bit_allocation (IMCContext* q, int stream_format_code, int freebits, int flag) {
+static int bit_allocation(IMCContext *q, int stream_format_code, int freebits,
+ int flag)
+{
int i, j;
const float limit = -1.e20;
float highest = 0.0;
@@ -327,31 +332,30 @@ static int bit_allocation (IMCContext* q, int stream_format_code, int freebits,
int flg;
int found_indx = 0;
- for(i = 0; i < BANDS; i++)
+ for (i = 0; i < BANDS; i++)
highest = FFMAX(highest, q->flcoeffs1[i]);
- for(i = 0; i < BANDS-1; i++) {
- q->flcoeffs4[i] = q->flcoeffs3[i] - log(q->flcoeffs5[i])/log(2);
- }
+ for (i = 0; i < BANDS - 1; i++)
+ q->flcoeffs4[i] = q->flcoeffs3[i] - log(q->flcoeffs5[i]) / log(2);
q->flcoeffs4[BANDS - 1] = limit;
highest = highest * 0.25;
- for(i = 0; i < BANDS; i++) {
+ for (i = 0; i < BANDS; i++) {
indx = -1;
- if ((band_tab[i+1] - band_tab[i]) == q->bandWidthT[i])
+ if ((band_tab[i + 1] - band_tab[i]) == q->bandWidthT[i])
indx = 0;
- if ((band_tab[i+1] - band_tab[i]) > q->bandWidthT[i])
+ if ((band_tab[i + 1] - band_tab[i]) > q->bandWidthT[i])
indx = 1;
- if (((band_tab[i+1] - band_tab[i])/2) >= q->bandWidthT[i])
+ if (((band_tab[i + 1] - band_tab[i]) / 2) >= q->bandWidthT[i])
indx = 2;
if (indx == -1)
return AVERROR_INVALIDDATA;
- q->flcoeffs4[i] = q->flcoeffs4[i] + xTab[(indx*2 + (q->flcoeffs1[i] < highest)) * 2 + flag];
+ q->flcoeffs4[i] += xTab[(indx * 2 + (q->flcoeffs1[i] < highest)) * 2 + flag];
}
if (stream_format_code & 0x2) {
@@ -361,22 +365,23 @@ static int bit_allocation (IMCContext* q, int stream_format_code, int freebits,
q->flcoeffs4[3] = limit;
}
- for(i = (stream_format_code & 0x2)?4:0; i < BANDS-1; i++) {
- iacc += q->bandWidthT[i];
+ for (i = (stream_format_code & 0x2) ? 4 : 0; i < BANDS - 1; i++) {
+ iacc += q->bandWidthT[i];
summa += q->bandWidthT[i] * q->flcoeffs4[i];
}
- q->bandWidthT[BANDS-1] = 0;
+ q->bandWidthT[BANDS - 1] = 0;
summa = (summa * 0.5 - freebits) / iacc;
- for(i = 0; i < BANDS/2; i++) {
+ for (i = 0; i < BANDS / 2; i++) {
rres = summer - freebits;
- if((rres >= -8) && (rres <= 8)) break;
+ if ((rres >= -8) && (rres <= 8))
+ break;
summer = 0;
- iacc = 0;
+ iacc = 0;
- for(j = (stream_format_code & 0x2)?4:0; j < BANDS; j++) {
+ for (j = (stream_format_code & 0x2) ? 4 : 0; j < BANDS; j++) {
cwlen = av_clipf(((q->flcoeffs4[j] * 0.5) - summa + 0.5), 0, 6);
q->bitsBandT[j] = cwlen;
@@ -392,32 +397,33 @@ static int bit_allocation (IMCContext* q, int stream_format_code, int freebits,
t2 = -1;
if (i == 0)
flg = t2;
- if(flg != t2)
+ if (flg != t2)
t1++;
summa = (float)(summer - freebits) / ((t1 + 1) * iacc) + summa;
}
- for(i = (stream_format_code & 0x2)?4:0; i < BANDS; i++) {
- for(j = band_tab[i]; j < band_tab[i+1]; j++)
+ for (i = (stream_format_code & 0x2) ? 4 : 0; i < BANDS; i++) {
+ for (j = band_tab[i]; j < band_tab[i + 1]; j++)
q->CWlengthT[j] = q->bitsBandT[i];
}
if (freebits > summer) {
- for(i = 0; i < BANDS; i++) {
- workT[i] = (q->bitsBandT[i] == 6) ? -1.e20 : (q->bitsBandT[i] * -2 + q->flcoeffs4[i] - 0.415);
+ for (i = 0; i < BANDS; i++) {
+ workT[i] = (q->bitsBandT[i] == 6) ? -1.e20
+ : (q->bitsBandT[i] * -2 + q->flcoeffs4[i] - 0.415);
}
highest = 0.0;
- do{
+ do {
if (highest <= -1.e20)
break;
found_indx = 0;
highest = -1.e20;
- for(i = 0; i < BANDS; i++) {
+ for (i = 0; i < BANDS; i++) {
if (workT[i] > highest) {
highest = workT[i];
found_indx = i;
@@ -426,19 +432,20 @@ static int bit_allocation (IMCContext* q, int stream_format_code, int freebits,
if (highest > -1.e20) {
workT[found_indx] -= 2.0;
- if (++(q->bitsBandT[found_indx]) == 6)
+ if (++q->bitsBandT[found_indx] == 6)
workT[found_indx] = -1.e20;
- for(j = band_tab[found_indx]; j < band_tab[found_indx+1] && (freebits > summer); j++){
+ for (j = band_tab[found_indx]; j < band_tab[found_indx + 1] && (freebits > summer); j++) {
q->CWlengthT[j]++;
summer++;
}
}
- }while (freebits > summer);
+ } while (freebits > summer);
}
if (freebits < summer) {
- for(i = 0; i < BANDS; i++) {
- workT[i] = q->bitsBandT[i] ? (q->bitsBandT[i] * -2 + q->flcoeffs4[i] + 1.585) : 1.e20;
+ for (i = 0; i < BANDS; i++) {
+ workT[i] = q->bitsBandT[i] ? (q->bitsBandT[i] * -2 + q->flcoeffs4[i] + 1.585)
+ : 1.e20;
}
if (stream_format_code & 0x2) {
workT[0] = 1.e20;
@@ -446,23 +453,24 @@ static int bit_allocation (IMCContext* q, int stream_format_code, int freebits,
workT[2] = 1.e20;
workT[3] = 1.e20;
}
- while (freebits < summer){
- lowest = 1.e10;
+ while (freebits < summer) {
+ lowest = 1.e10;
low_indx = 0;
- for(i = 0; i < BANDS; i++) {
+ for (i = 0; i < BANDS; i++) {
if (workT[i] < lowest) {
- lowest = workT[i];
+ lowest = workT[i];
low_indx = i;
}
}
- //if(lowest >= 1.e10) break;
+ // if (lowest >= 1.e10)
+ // break;
workT[low_indx] = lowest + 2.0;
- if (!(--q->bitsBandT[low_indx]))
+ if (!--q->bitsBandT[low_indx])
workT[low_indx] = 1.e20;
- for(j = band_tab[low_indx]; j < band_tab[low_indx+1] && (freebits < summer); j++){
- if(q->CWlengthT[j] > 0){
+ for (j = band_tab[low_indx]; j < band_tab[low_indx+1] && (freebits < summer); j++) {
+ if (q->CWlengthT[j] > 0) {
q->CWlengthT[j]--;
summer--;
}
@@ -472,49 +480,51 @@ static int bit_allocation (IMCContext* q, int stream_format_code, int freebits,
return 0;
}
-static void imc_get_skip_coeff(IMCContext* q) {
+static void imc_get_skip_coeff(IMCContext *q)
+{
int i, j;
- memset(q->skipFlagBits, 0, sizeof(q->skipFlagBits));
+ memset(q->skipFlagBits, 0, sizeof(q->skipFlagBits));
memset(q->skipFlagCount, 0, sizeof(q->skipFlagCount));
- for(i = 0; i < BANDS; i++) {
+ for (i = 0; i < BANDS; i++) {
if (!q->bandFlagsBuf[i] || !q->bandWidthT[i])
continue;
if (!q->skipFlagRaw[i]) {
- q->skipFlagBits[i] = band_tab[i+1] - band_tab[i];
+ q->skipFlagBits[i] = band_tab[i + 1] - band_tab[i];
- for(j = band_tab[i]; j < band_tab[i+1]; j++) {
- if ((q->skipFlags[j] = get_bits1(&q->gb)))
+ for (j = band_tab[i]; j < band_tab[i + 1]; j++) {
+ q->skipFlags[j] = get_bits1(&q->gb);
+ if (q->skipFlags[j])
q->skipFlagCount[i]++;
}
} else {
- for(j = band_tab[i]; j < (band_tab[i+1]-1); j += 2) {
- if(!get_bits1(&q->gb)){//0
+ for (j = band_tab[i]; j < band_tab[i + 1] - 1; j += 2) {
+ if (!get_bits1(&q->gb)) { // 0
q->skipFlagBits[i]++;
- q->skipFlags[j]=1;
- q->skipFlags[j+1]=1;
+ q->skipFlags[j] = 1;
+ q->skipFlags[j + 1] = 1;
q->skipFlagCount[i] += 2;
- }else{
- if(get_bits1(&q->gb)){//11
- q->skipFlagBits[i] +=2;
- q->skipFlags[j]=0;
- q->skipFlags[j+1]=1;
+ } else {
+ if (get_bits1(&q->gb)) { // 11
+ q->skipFlagBits[i] += 2;
+ q->skipFlags[j] = 0;
+ q->skipFlags[j + 1] = 1;
q->skipFlagCount[i]++;
- }else{
- q->skipFlagBits[i] +=3;
- q->skipFlags[j+1]=0;
- if(!get_bits1(&q->gb)){//100
- q->skipFlags[j]=1;
+ } else {
+ q->skipFlagBits[i] += 3;
+ q->skipFlags[j + 1] = 0;
+ if (!get_bits1(&q->gb)) { // 100
+ q->skipFlags[j] = 1;
q->skipFlagCount[i]++;
- }else{//101
- q->skipFlags[j]=0;
+ } else { // 101
+ q->skipFlags[j] = 0;
}
}
}
}
- if (j < band_tab[i+1]) {
+ if (j < band_tab[i + 1]) {
q->skipFlagBits[i]++;
if ((q->skipFlags[j] = get_bits1(&q->gb)))
q->skipFlagCount[i]++;
@@ -526,24 +536,26 @@ static void imc_get_skip_coeff(IMCContext* q) {
/**
* Increase highest' band coefficient sizes as some bits won't be used
*/
-static void imc_adjust_bit_allocation (IMCContext* q, int summer) {
+static void imc_adjust_bit_allocation(IMCContext *q, int summer)
+{
float workT[32];
int corrected = 0;
int i, j;
- float highest = 0;
- int found_indx=0;
+ float highest = 0;
+ int found_indx = 0;
- for(i = 0; i < BANDS; i++) {
- workT[i] = (q->bitsBandT[i] == 6) ? -1.e20 : (q->bitsBandT[i] * -2 + q->flcoeffs4[i] - 0.415);
+ for (i = 0; i < BANDS; i++) {
+ workT[i] = (q->bitsBandT[i] == 6) ? -1.e20
+ : (q->bitsBandT[i] * -2 + q->flcoeffs4[i] - 0.415);
}
while (corrected < summer) {
- if(highest <= -1.e20)
+ if (highest <= -1.e20)
break;
highest = -1.e20;
- for(i = 0; i < BANDS; i++) {
+ for (i = 0; i < BANDS; i++) {
if (workT[i] > highest) {
highest = workT[i];
found_indx = i;
@@ -555,7 +567,7 @@ static void imc_adjust_bit_allocation (IMCContext* q, int summer) {
if (++(q->bitsBandT[found_indx]) == 6)
workT[found_indx] = -1.e20;
- for(j = band_tab[found_indx]; j < band_tab[found_indx+1] && (corrected < summer); j++) {
+ for (j = band_tab[found_indx]; j < band_tab[found_indx+1] && (corrected < summer); j++) {
if (!q->skipFlags[j] && (q->CWlengthT[j] < 6)) {
q->CWlengthT[j]++;
corrected++;
@@ -565,61 +577,65 @@ static void imc_adjust_bit_allocation (IMCContext* q, int summer) {
}
}
-static void imc_imdct256(IMCContext *q) {
+static void imc_imdct256(IMCContext *q)
+{
int i;
float re, im;
/* prerotation */
- for(i=0; i < COEFFS/2; i++){
- q->samples[i].re = -(q->pre_coef1[i] * q->CWdecoded[COEFFS-1-i*2]) -
- (q->pre_coef2[i] * q->CWdecoded[i*2]);
- q->samples[i].im = (q->pre_coef2[i] * q->CWdecoded[COEFFS-1-i*2]) -
- (q->pre_coef1[i] * q->CWdecoded[i*2]);
+ for (i = 0; i < COEFFS / 2; i++) {
+ q->samples[i].re = -(q->pre_coef1[i] * q->CWdecoded[COEFFS - 1 - i * 2]) -
+ (q->pre_coef2[i] * q->CWdecoded[i * 2]);
+ q->samples[i].im = (q->pre_coef2[i] * q->CWdecoded[COEFFS - 1 - i * 2]) -
+ (q->pre_coef1[i] * q->CWdecoded[i * 2]);
}
/* FFT */
q->fft.fft_permute(&q->fft, q->samples);
- q->fft.fft_calc (&q->fft, q->samples);
+ q->fft.fft_calc(&q->fft, q->samples);
/* postrotation, window and reorder */
- for(i = 0; i < COEFFS/2; i++){
- re = (q->samples[i].re * q->post_cos[i]) + (-q->samples[i].im * q->post_sin[i]);
- im = (-q->samples[i].im * q->post_cos[i]) - (q->samples[i].re * q->post_sin[i]);
- q->out_samples[i*2] = (q->mdct_sine_window[COEFFS-1-i*2] * q->last_fft_im[i]) + (q->mdct_sine_window[i*2] * re);
- q->out_samples[COEFFS-1-i*2] = (q->mdct_sine_window[i*2] * q->last_fft_im[i]) - (q->mdct_sine_window[COEFFS-1-i*2] * re);
+ for (i = 0; i < COEFFS / 2; i++) {
+ re = ( q->samples[i].re * q->post_cos[i]) + (-q->samples[i].im * q->post_sin[i]);
+ im = (-q->samples[i].im * q->post_cos[i]) - ( q->samples[i].re * q->post_sin[i]);
+ q->out_samples[i * 2] = (q->mdct_sine_window[COEFFS - 1 - i * 2] * q->last_fft_im[i])
+ + (q->mdct_sine_window[i * 2] * re);
+ q->out_samples[COEFFS - 1 - i * 2] = (q->mdct_sine_window[i * 2] * q->last_fft_im[i])
+ - (q->mdct_sine_window[COEFFS - 1 - i * 2] * re);
q->last_fft_im[i] = im;
}
}
-static int inverse_quant_coeff (IMCContext* q, int stream_format_code) {
+static int inverse_quant_coeff(IMCContext *q, int stream_format_code)
+{
int i, j;
int middle_value, cw_len, max_size;
- const float* quantizer;
+ const float *quantizer;
- for(i = 0; i < BANDS; i++) {
- for(j = band_tab[i]; j < band_tab[i+1]; j++) {
+ for (i = 0; i < BANDS; i++) {
+ for (j = band_tab[i]; j < band_tab[i + 1]; j++) {
q->CWdecoded[j] = 0;
cw_len = q->CWlengthT[j];
if (cw_len <= 0 || q->skipFlags[j])
continue;
- max_size = 1 << cw_len;
+ max_size = 1 << cw_len;
middle_value = max_size >> 1;
if (q->codewords[j] >= max_size || q->codewords[j] < 0)
return AVERROR_INVALIDDATA;
- if (cw_len >= 4){
+ if (cw_len >= 4) {
quantizer = imc_quantizer2[(stream_format_code & 2) >> 1];
if (q->codewords[j] >= middle_value)
- q->CWdecoded[j] = quantizer[q->codewords[j] - 8] * q->flcoeffs6[i];
+ q->CWdecoded[j] = quantizer[q->codewords[j] - 8] * q->flcoeffs6[i];
else
q->CWdecoded[j] = -quantizer[max_size - q->codewords[j] - 8 - 1] * q->flcoeffs6[i];
}else{
quantizer = imc_quantizer1[((stream_format_code & 2) >> 1) | (q->bandFlagsBuf[i] << 1)];
if (q->codewords[j] >= middle_value)
- q->CWdecoded[j] = quantizer[q->codewords[j] - 1] * q->flcoeffs6[i];
+ q->CWdecoded[j] = quantizer[q->codewords[j] - 1] * q->flcoeffs6[i];
else
q->CWdecoded[j] = -quantizer[max_size - 2 - q->codewords[j]] * q->flcoeffs6[i];
}
@@ -629,22 +645,24 @@ static int inverse_quant_coeff (IMCContext* q, int stream_format_code) {
}
-static int imc_get_coeffs (IMCContext* q) {
+static int imc_get_coeffs(IMCContext *q)
+{
int i, j, cw_len, cw;
- for(i = 0; i < BANDS; i++) {
- if(!q->sumLenArr[i]) continue;
+ for (i = 0; i < BANDS; i++) {
+ if (!q->sumLenArr[i])
+ continue;
if (q->bandFlagsBuf[i] || q->bandWidthT[i]) {
- for(j = band_tab[i]; j < band_tab[i+1]; j++) {
+ for (j = band_tab[i]; j < band_tab[i + 1]; j++) {
cw_len = q->CWlengthT[j];
cw = 0;
- if (get_bits_count(&q->gb) + cw_len > 512){
-//av_log(NULL,0,"Band %i coeff %i cw_len %i\n",i,j,cw_len);
+ if (get_bits_count(&q->gb) + cw_len > 512) {
+ // av_log(NULL, 0, "Band %i coeff %i cw_len %i\n", i, j, cw_len);
return AVERROR_INVALIDDATA;
}
- if(cw_len && (!q->bandFlagsBuf[i] || !q->skipFlags[j]))
+ if (cw_len && (!q->bandFlagsBuf[i] || !q->skipFlags[j]))
cw = get_bits(&q->gb, cw_len);
q->codewords[j] = cw;
@@ -654,7 +672,7 @@ static int imc_get_coeffs (IMCContext* q) {
return 0;
}
-static int imc_decode_frame(AVCodecContext * avctx, void *data,
+static int imc_decode_frame(AVCodecContext *avctx, void *data,
int *got_frame_ptr, AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
@@ -680,7 +698,7 @@ static int imc_decode_frame(AVCodecContext * avctx, void *data,
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return ret;
}
- q->out_samples = (float *)q->frame.data[0];
+ q->out_samples = (float*)q->frame.data[0];
q->dsp.bswap16_buf(buf16, (const uint16_t*)buf, IMC_BLOCK_SIZE / 2);
@@ -695,7 +713,7 @@ static int imc_decode_frame(AVCodecContext * avctx, void *data,
}
stream_format_code = get_bits(&q->gb, 3);
- if(stream_format_code & 1){
+ if (stream_format_code & 1) {
av_log(avctx, AV_LOG_ERROR, "Stream code format %X is not supported\n", stream_format_code);
return AVERROR_INVALIDDATA;
}
@@ -705,10 +723,12 @@ static int imc_decode_frame(AVCodecContext * avctx, void *data,
if (stream_format_code & 0x04)
q->decoder_reset = 1;
- if(q->decoder_reset) {
+ if (q->decoder_reset) {
memset(q->out_samples, 0, sizeof(q->out_samples));
- for(i = 0; i < BANDS; i++)q->old_floor[i] = 1.0;
- for(i = 0; i < COEFFS; i++)q->CWdecoded[i] = 0;
+ for (i = 0; i < BANDS; i++)
+ q->old_floor[i] = 1.0;
+ for (i = 0; i < COEFFS; i++)
+ q->CWdecoded[i] = 0;
q->decoder_reset = 0;
}
@@ -716,22 +736,24 @@ static int imc_decode_frame(AVCodecContext * avctx, void *data,
imc_read_level_coeffs(q, stream_format_code, q->levlCoeffBuf);
if (stream_format_code & 0x4)
- imc_decode_level_coefficients(q, q->levlCoeffBuf, q->flcoeffs1, q->flcoeffs2);
+ imc_decode_level_coefficients(q, q->levlCoeffBuf,
+ q->flcoeffs1, q->flcoeffs2);
else
- imc_decode_level_coefficients2(q, q->levlCoeffBuf, q->old_floor, q->flcoeffs1, q->flcoeffs2);
+ imc_decode_level_coefficients2(q, q->levlCoeffBuf, q->old_floor,
+ q->flcoeffs1, q->flcoeffs2);
memcpy(q->old_floor, q->flcoeffs1, 32 * sizeof(float));
counter = 0;
- for (i=0 ; i<BANDS ; i++) {
+ for (i = 0; i < BANDS; i++) {
if (q->levlCoeffBuf[i] == 16) {
q->bandWidthT[i] = 0;
counter++;
} else
- q->bandWidthT[i] = band_tab[i+1] - band_tab[i];
+ q->bandWidthT[i] = band_tab[i + 1] - band_tab[i];
}
memset(q->bandFlagsBuf, 0, BANDS * sizeof(int));
- for(i = 0; i < BANDS-1; i++) {
+ for (i = 0; i < BANDS - 1; i++) {
if (q->bandWidthT[i])
q->bandFlagsBuf[i] = get_bits1(&q->gb);
}
@@ -747,78 +769,79 @@ static int imc_decode_frame(AVCodecContext * avctx, void *data,
q->CWlengthT[0] = 5;
q->CWlengthT[1] = 5;
q->CWlengthT[2] = 5;
- for(i = 1; i < 4; i++){
+ for (i = 1; i < 4; i++) {
bits = (q->levlCoeffBuf[i] == 16) ? 0 : 5;
q->bitsBandT[i] = bits;
- for(j = band_tab[i]; j < band_tab[i+1]; j++) {
+ for (j = band_tab[i]; j < band_tab[i + 1]; j++) {
q->CWlengthT[j] = bits;
- bitscount += bits;
+ bitscount += bits;
}
}
}
- if((ret = bit_allocation (q, stream_format_code,
- 512 - bitscount - get_bits_count(&q->gb), flag)) < 0) {
+ if ((ret = bit_allocation(q, stream_format_code,
+ 512 - bitscount - get_bits_count(&q->gb),
+ flag)) < 0) {
av_log(avctx, AV_LOG_ERROR, "Bit allocations failed\n");
q->decoder_reset = 1;
return ret;
}
- for(i = 0; i < BANDS; i++) {
- q->sumLenArr[i] = 0;
+ for (i = 0; i < BANDS; i++) {
+ q->sumLenArr[i] = 0;
q->skipFlagRaw[i] = 0;
- for(j = band_tab[i]; j < band_tab[i+1]; j++)
+ for (j = band_tab[i]; j < band_tab[i + 1]; j++)
q->sumLenArr[i] += q->CWlengthT[j];
if (q->bandFlagsBuf[i])
- if( (((band_tab[i+1] - band_tab[i]) * 1.5) > q->sumLenArr[i]) && (q->sumLenArr[i] > 0))
+ if ((((band_tab[i + 1] - band_tab[i]) * 1.5) > q->sumLenArr[i]) && (q->sumLenArr[i] > 0))
q->skipFlagRaw[i] = 1;
}
imc_get_skip_coeff(q);
- for(i = 0; i < BANDS; i++) {
+ for (i = 0; i < BANDS; i++) {
q->flcoeffs6[i] = q->flcoeffs1[i];
/* band has flag set and at least one coded coefficient */
- if (q->bandFlagsBuf[i] && (band_tab[i+1] - band_tab[i]) != q->skipFlagCount[i]){
- q->flcoeffs6[i] *= q->sqrt_tab[band_tab[i+1] - band_tab[i]] /
- q->sqrt_tab[(band_tab[i+1] - band_tab[i] - q->skipFlagCount[i])];
+ if (q->bandFlagsBuf[i] && (band_tab[i + 1] - band_tab[i]) != q->skipFlagCount[i]) {
+ q->flcoeffs6[i] *= q->sqrt_tab[ band_tab[i + 1] - band_tab[i]] /
+ q->sqrt_tab[(band_tab[i + 1] - band_tab[i] - q->skipFlagCount[i])];
}
}
/* calculate bits left, bits needed and adjust bit allocation */
bits = summer = 0;
- for(i = 0; i < BANDS; i++) {
+ for (i = 0; i < BANDS; i++) {
if (q->bandFlagsBuf[i]) {
- for(j = band_tab[i]; j < band_tab[i+1]; j++) {
- if(q->skipFlags[j]) {
+ for (j = band_tab[i]; j < band_tab[i + 1]; j++) {
+ if (q->skipFlags[j]) {
summer += q->CWlengthT[j];
q->CWlengthT[j] = 0;
}
}
- bits += q->skipFlagBits[i];
+ bits += q->skipFlagBits[i];
summer -= q->skipFlagBits[i];
}
}
imc_adjust_bit_allocation(q, summer);
- for(i = 0; i < BANDS; i++) {
+ for (i = 0; i < BANDS; i++) {
q->sumLenArr[i] = 0;
- for(j = band_tab[i]; j < band_tab[i+1]; j++)
+ for (j = band_tab[i]; j < band_tab[i + 1]; j++)
if (!q->skipFlags[j])
q->sumLenArr[i] += q->CWlengthT[j];
}
memset(q->codewords, 0, sizeof(q->codewords));
- if(imc_get_coeffs(q) < 0) {
+ if (imc_get_coeffs(q) < 0) {
av_log(avctx, AV_LOG_ERROR, "Read coefficients failed\n");
q->decoder_reset = 1;
return AVERROR_INVALIDDATA;
}
- if(inverse_quant_coeff(q, stream_format_code) < 0) {
+ if (inverse_quant_coeff(q, stream_format_code) < 0) {
av_log(avctx, AV_LOG_ERROR, "Inverse quantization of coefficients failed\n");
q->decoder_reset = 1;
return AVERROR_INVALIDDATA;
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