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ffmpeg.wasm-core
Commit 271593f1 authored by Måns Rullgård's avatar Måns Rullgård
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fix multichannel decoding 

Originally committed as revision 7839 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent 3a0495a2
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Showing with 190 additions and 164 deletions
libavcodec/armv4l/simple_idct_armv6.S
View file @ 271593f1
......@@ -47,6 +47,19 @@ w42n: .long W42n
w46: .long W46
w57: .long W57
.macro idct_row_start shift
ldr ip, [pc, #(w42-.-8)] /* ip = W4 | (W2 << 16) */
ldr lr, [pc, #(w46-.-8)] /* lr = W4 | (W6 << 16) */
ldr v7, [pc, #(w57-.-8)] /* v7 = W5 | (W7 << 16) */
mov a2, #(1<<(\shift-1))
smlad v1, a3, ip, a2
smlsd v4, a3, ip, a2
ldr ip, [pc, #(w13-.-8)] /* ip = W1 | (W3 << 16) */
smlad v2, a3, lr, a2
smlsd v3, a3, lr, a2
smusdx fp, a4, v7 /* fp = B3 = W7*row[1] - W5*row[3] */
smuad v5, a4, ip /* v5 = B0 = W1*row[1] + W3*row[3] */
.endm
/*
Compute partial IDCT of single row.
shift = left-shift amount
......@@ -58,17 +71,6 @@ w57: .long W57
Output in registers v1--v8
*/
.macro idct_row shift
ldr lr, [pc, #(w46-.-8)] /* lr = W4 | (W6 << 16) */
mov a2, #(1<<(\shift-1))
smlad v1, a3, ip, a2
smlsd v4, a3, ip, a2
ldr ip, [pc, #(w13-.-8)] /* ip = W1 | (W3 << 16) */
ldr v7, [pc, #(w57-.-8)] /* v7 = W5 | (W7 << 16) */
smlad v2, a3, lr, a2
smlsd v3, a3, lr, a2
smuad v5, a4, ip /* v5 = B0 = W1*row[1] + W3*row[3] */
smusdx fp, a4, v7 /* fp = B3 = W7*row[1] - W5*row[3] */
ldr lr, [a1, #12] /* lr = row[7,5] */
pkhtb a3, ip, v7, asr #16 /* a4 = W7 | (W3 << 16) */
pkhbt a2, ip, v7, lsl #16 /* a2 = W1 | (W5 << 16) */
......@@ -99,16 +101,6 @@ w57: .long W57
Output in registers v1--v8
*/
.macro idct_row4 shift
ldr lr, [pc, #(w46-.-8)] /* lr = W4 | (W6 << 16) */
ldr v7, [pc, #(w57-.-8)] /* v7 = W5 | (W7 << 16) */
mov a2, #(1<<(\shift-1))
smlad v1, a3, ip, a2
smlsd v4, a3, ip, a2
ldr ip, [pc, #(w13-.-8)] /* ip = W1 | (W3 << 16) */
smlad v2, a3, lr, a2
smlsd v3, a3, lr, a2
smusdx fp, a4, v7 /* fp = B3 = W7*row[1] - W5*row[3] */
smuad v5, a4, ip /* v5 = B0 = W1*row[1] + W3*row[3] */
pkhtb a3, ip, v7, asr #16 /* a4 = W7 | (W3 << 16) */
pkhbt a2, ip, v7, lsl #16 /* a2 = W1 | (W5 << 16) */
smusdx v6, a3, a4 /* v6 = -B1 = W7*row[3] - W3*row[1] */
......@@ -193,28 +185,100 @@ w57: .long W57
.align
.func idct_row_armv6
idct_row_armv6:
str lr, [sp, #-4]!
ldr lr, [a1, #12] /* lr = row[7,5] */
ldr ip, [a1, #4] /* ip = row[6,4] */
ldr fp, [a1, #12] /* fp = row[7,5] */
ldr v7, [a1, #4] /* v7 = row[6,4] */
ldr a4, [a1, #8] /* a4 = row[3,1] */
ldr a3, [a1] /* a3 = row[2,0] */
orrs lr, lr, ip
cmpeq lr, a4
cmpeq lr, a3, lsr #16
mov ip, #(1<<(ROW_SHIFT-1))
orrs v5, fp, v7
cmpeq v5, a4
cmpeq v5, a3, lsr #16
beq 1f
str a2, [sp, #-4]!
ldr ip, [pc, #(w42-.-8)] /* ip = W4 | (W2 << 16) */
cmp lr, #0
beq 2f
cmp v5, #0
stmfd sp!, {a2, lr}
ldr v5, [pc, #(w42-.-8)] /* v5 = W4 | (W2 << 16) */
ldr v6, [pc, #(w46-.-8)] /* v6 = W4 | (W6 << 16) */
ldr v7, [pc, #(w57-.-8)] /* v7 = W5 | (W7 << 16) */
idct_row ROW_SHIFT
b 3f
smlad v1, a3, v5, ip
smlsd v4, a3, v5, ip
ldr a2, [pc, #(w13-.-8)] /* a2 = W1 | (W3 << 16) */
smlad v2, a3, v6, ip
smlsd v3, a3, v6, ip
smusdx lr, a4, v7 /* lr = B3 = W7*row[1] - W5*row[3] */
smuad v5, a4, a2 /* v5 = B0 = W1*row[1] + W3*row[3] */
2: idct_row4 ROW_SHIFT
pkhtb a3, a2, v7, asr #16 /* a3 = W7 | (W3 << 16) */
pkhbt ip, a2, v7, lsl #16 /* ip = W1 | (W5 << 16) */
smusdx v6, a3, a4 /* v6 = -B1 = W7*row[3] - W3*row[1] */
smusdx a4, a4, ip /* v7 = B2 = W5*row[1] - W1*row[3] */
beq 3f
smlad v5, fp, v7, v5 /* B0 += W5*row[5] + W7*row[7] */
smlad v7, fp, a3, a4 /* B2 += W7*row[5] + W3*row[7] */
ldr a4, [pc, #(w42n-.-8)] /* a4 = -W4 | (-W2 << 16) */
ldr a3, [a1, #4] /* a3 = row[6,4] */
smlsdx lr, fp, a2, lr /* B3 += W3*row[5] - W1*row[7] */
ldr a2, [pc, #(w46-.-8)] /* a2 = W4 | (W6 << 16) */
smlad v6, fp, ip, v6 /* B1 -= W1*row[5] + W5*row[7] */
smlad v2, a3, a4, v2 /* A1 += -W4*row[4] - W2*row[6] */
smlsd v3, a3, a4, v3 /* A2 += -W4*row[4] + W2*row[6] */
smlad v1, a3, a2, v1 /* A0 += W4*row[4] + W6*row[6] */
smlsd v4, a3, a2, v4 /* A3 += W4*row[4] - W6*row[6] */
ldr a2, [sp], #4
add a4, v1, v5 /* a4 = A0 + B0 */
sub a3, v1, v5 /* a3 = A0 - B0 */
mov v1, a4, asr #ROW_SHIFT
mov v5, a3, asr #ROW_SHIFT
sub a4, v2, v6 /* a4 = A1 + B1 */
add a3, v2, v6 /* a3 = A1 - B1 */
mov v2, a4, asr #ROW_SHIFT
mov v6, a3, asr #ROW_SHIFT
add a4, v3, v7 /* a4 = A2 + B2 */
sub a3, v3, v7 /* a3 = A2 - B2 */
mov v3, a4, asr #ROW_SHIFT
mov v7, a3, asr #ROW_SHIFT
add a4, v4, lr /* a4 = A3 + B3 */
sub a3, v4, lr /* a3 = A3 - B3 */
mov v4, a4, asr #ROW_SHIFT
mov fp, a3, asr #ROW_SHIFT
strh v1, [a2]
strh v2, [a2, #(16*2)]
strh v3, [a2, #(16*4)]
strh v4, [a2, #(16*6)]
strh fp, [a2, #(16*1)]
strh v7, [a2, #(16*3)]
strh v6, [a2, #(16*5)]
strh v5, [a2, #(16*7)]
ldr pc, [sp], #4
3: ldr a2, [sp], #4
idct_finish_shift ROW_SHIFT
add v7, v1, v5 /* v7 = A0 + B0 */
sub a3, v1, v5 /* a3 = A0 - B0 */
mov v1, v7, asr #ROW_SHIFT
mov v5, a3, asr #ROW_SHIFT
sub v7, v2, v6 /* v7 = A1 + B1 */
add a3, v2, v6 /* a3 = A1 - B1 */
mov v2, v7, asr #ROW_SHIFT
mov v6, a3, asr #ROW_SHIFT
add v7, v3, a4 /* v7 = A2 + B2 */
sub a3, v3, a4 /* a3 = A2 - B2 */
mov v3, v7, asr #ROW_SHIFT
mov v7, a3, asr #ROW_SHIFT
add a4, v4, lr /* xx = A3 + B3 */
sub a3, v4, lr /* a3 = A3 - B3 */
mov v4, a4, asr #ROW_SHIFT
mov fp, a3, asr #ROW_SHIFT
strh v1, [a2]
strh v2, [a2, #(16*2)]
......@@ -236,7 +300,7 @@ idct_row_armv6:
strh a3, [a2, #(16*3)]
strh a3, [a2, #(16*5)]
strh a3, [a2, #(16*7)]
ldr pc, [sp], #4
mov pc, lr
.endfunc
/*
......@@ -250,8 +314,8 @@ idct_col_armv6:
stmfd sp!, {a2, lr}
ldr a3, [a1] /* a3 = row[2,0] */
ldr ip, [pc, #(w42-.-8)] /* ip = W4 | (W2 << 16) */
ldr a4, [a1, #8] /* a4 = row[3,1] */
idct_row_start COL_SHIFT
idct_row COL_SHIFT
ldr a2, [sp], #4
idct_finish_shift COL_SHIFT
......@@ -280,8 +344,8 @@ idct_col_put_armv6:
stmfd sp!, {a2, a3, lr}
ldr a3, [a1] /* a3 = row[2,0] */
ldr ip, [pc, #(w42-.-8)] /* ip = W4 | (W2 << 16) */
ldr a4, [a1, #8] /* a4 = row[3,1] */
idct_row_start COL_SHIFT
idct_row COL_SHIFT
ldmfd sp!, {a2, a3}
idct_finish_shift_sat COL_SHIFT
......@@ -312,8 +376,8 @@ idct_col_add_armv6:
stmfd sp!, {a2, a3, lr}
ldr a3, [a1] /* a3 = row[2,0] */
ldr ip, [pc, #(w42-.-8)] /* ip = W4 | (W2 << 16) */
ldr a4, [a1, #8] /* a4 = row[3,1] */
idct_row_start COL_SHIFT
idct_row COL_SHIFT
ldmfd sp!, {a2, a3}
idct_finish
......
libavcodec/dtsdec.c
View file @ 271593f1
......@@ -28,13 +28,8 @@
#define BUFFER_SIZE 18726
#define HEADER_SIZE 14
#ifdef LIBDTS_FIXED
#define CONVERT_LEVEL (1 << 26)
#define CONVERT_BIAS 0
#else
#define CONVERT_LEVEL 1
#define CONVERT_BIAS 384
#endif
#define CONVERT_BIAS 0
typedef struct DTSContext {
dts_state_t *state;
......@@ -44,151 +39,120 @@ typedef struct DTSContext {
} DTSContext;
static inline int16_t
convert(int32_t i)
{
#ifdef LIBDTS_FIXED
i >>= 15;
#else
i -= 0x43c00000;
#endif
return (i > 32767) ? 32767 : ((i < -32768) ? -32768 : i);
}
static void
convert2s16_2(sample_t * _f, int16_t * s16)
{
int i;
int32_t *f = (int32_t *) _f;
for(i = 0; i < 256; i++) {
s16[2 * i] = convert(f[i]);
s16[2 * i + 1] = convert(f[i + 256]);
}
}
static void
convert2s16_4(sample_t * _f, int16_t * s16)
{
int i;
int32_t *f = (int32_t *) _f;
for(i = 0; i < 256; i++) {
s16[4 * i] = convert(f[i]);
s16[4 * i + 1] = convert(f[i + 256]);
s16[4 * i + 2] = convert(f[i + 512]);
s16[4 * i + 3] = convert(f[i + 768]);
}
}
static void
convert2s16_5(sample_t * _f, int16_t * s16)
convert(sample_t s)
{
int i;
int32_t *f = (int32_t *) _f;
for(i = 0; i < 256; i++) {
s16[5 * i] = convert(f[i]);
s16[5 * i + 1] = convert(f[i + 256]);
s16[5 * i + 2] = convert(f[i + 512]);
s16[5 * i + 3] = convert(f[i + 768]);
s16[5 * i + 4] = convert(f[i + 1024]);
}
return s * 0x7fff;
}
static void
convert2s16_multi(sample_t * _f, int16_t * s16, int flags)
convert2s16_multi(sample_t *f, int16_t *s16, int flags)
{
int i;
int32_t *f = (int32_t *) _f;
switch (flags) {
switch(flags & (DTS_CHANNEL_MASK | DTS_LFE)){
case DTS_MONO:
for(i = 0; i < 256; i++) {
s16[5 * i] = s16[5 * i + 1] = s16[5 * i + 2] = s16[5 * i + 3] =
0;
s16[5 * i + 4] = convert(f[i]);
for(i = 0; i < 256; i++){
s16[5*i] = s16[5*i+1] = s16[5*i+2] = s16[5*i+3] = 0;
s16[5*i+4] = convert(f[i]);
}
break;
case DTS_CHANNEL:
case DTS_STEREO:
case DTS_DOLBY:
convert2s16_2(_f, s16);
break;
for(i = 0; i < 256; i++){
s16[2*i] = convert(f[i]);
s16[2*i+1] = convert(f[i+256]);
}
case DTS_3F:
for(i = 0; i < 256; i++) {
s16[5 * i] = convert(f[i]);
s16[5 * i + 1] = convert(f[i + 512]);
s16[5 * i + 2] = s16[5 * i + 3] = 0;
s16[5 * i + 4] = convert(f[i + 256]);
for(i = 0; i < 256; i++){
s16[5*i] = convert(f[i+256]);
s16[5*i+1] = convert(f[i+512]);
s16[5*i+2] = s16[5*i+3] = 0;
s16[5*i+4] = convert(f[i]);
}
break;
case DTS_2F2R:
convert2s16_4(_f, s16);
break;
for(i = 0; i < 256; i++){
s16[4*i] = convert(f[i]);
s16[4*i+1] = convert(f[i+256]);
s16[4*i+2] = convert(f[i+512]);
s16[4*i+3] = convert(f[i+768]);
}
case DTS_3F2R:
convert2s16_5(_f, s16);
break;
for(i = 0; i < 256; i++){
s16[5*i] = convert(f[i+256]);
s16[5*i+1] = convert(f[i+512]);
s16[5*i+2] = convert(f[i+768]);
s16[5*i+3] = convert(f[i+1024]);
s16[5*i+4] = convert(f[i]);
}
case DTS_MONO | DTS_LFE:
for(i = 0; i < 256; i++) {
s16[6 * i] = s16[6 * i + 1] = s16[6 * i + 2] = s16[6 * i + 3] =
0;
s16[6 * i + 4] = convert(f[i + 256]);
s16[6 * i + 5] = convert(f[i]);
for(i = 0; i < 256; i++){
s16[6*i] = s16[6*i+1] = s16[6*i+2] = s16[6*i+3] = 0;
s16[6*i+4] = convert(f[i]);
s16[6*i+5] = convert(f[i+256]);
}
break;
case DTS_CHANNEL | DTS_LFE:
case DTS_STEREO | DTS_LFE:
case DTS_DOLBY | DTS_LFE:
for(i = 0; i < 256; i++) {
s16[6 * i] = convert(f[i + 256]);
s16[6 * i + 1] = convert(f[i + 512]);
s16[6 * i + 2] = s16[6 * i + 3] = s16[6 * i + 4] = 0;
s16[6 * i + 5] = convert(f[i]);
for(i = 0; i < 256; i++){
s16[6*i] = convert(f[i]);
s16[6*i+1] = convert(f[i+256]);
s16[6*i+2] = s16[6*i+3] = s16[6*i+4] = 0;
s16[6*i+5] = convert(f[i+512]);
}
break;
case DTS_3F | DTS_LFE:
for(i = 0; i < 256; i++) {
s16[6 * i] = convert(f[i + 256]);
s16[6 * i + 1] = convert(f[i + 768]);
s16[6 * i + 2] = s16[6 * i + 3] = 0;
s16[6 * i + 4] = convert(f[i + 512]);
s16[6 * i + 5] = convert(f[i]);
for(i = 0; i < 256; i++){
s16[6*i] = convert(f[i+256]);
s16[6*i+1] = convert(f[i+512]);
s16[6*i+2] = s16[6*i+3] = 0;
s16[6*i+4] = convert(f[i]);
s16[6*i+5] = convert(f[i+768]);
}
break;
case DTS_2F2R | DTS_LFE:
for(i = 0; i < 256; i++) {
s16[6 * i] = convert(f[i + 256]);
s16[6 * i + 1] = convert(f[i + 512]);
s16[6 * i + 2] = convert(f[i + 768]);
s16[6 * i + 3] = convert(f[i + 1024]);
s16[6 * i + 4] = 0;
s16[6 * i + 5] = convert(f[i]);
for(i = 0; i < 256; i++){
s16[6*i] = convert(f[i]);
s16[6*i+1] = convert(f[i+256]);
s16[6*i+2] = convert(f[i+512]);
s16[6*i+3] = convert(f[i+768]);
s16[6*i+4] = 0;
s16[6*i+5] = convert(f[i+1024]);
}
break;
case DTS_3F2R | DTS_LFE:
for(i = 0; i < 256; i++) {
s16[6 * i] = convert(f[i + 256]);
s16[6 * i + 1] = convert(f[i + 768]);
s16[6 * i + 2] = convert(f[i + 1024]);
s16[6 * i + 3] = convert(f[i + 1280]);
s16[6 * i + 4] = convert(f[i + 512]);
s16[6 * i + 5] = convert(f[i]);
for(i = 0; i < 256; i++){
s16[6*i] = convert(f[i+256]);
s16[6*i+1] = convert(f[i+512]);
s16[6*i+2] = convert(f[i+768]);
s16[6*i+3] = convert(f[i+1024]);
s16[6*i+4] = convert(f[i]);
s16[6*i+5] = convert(f[i+1280]);
}
break;
}
}
static int
channels_multi(int flags)
{
if(flags & DTS_LFE)
return 6;
else if(flags & 1) /* center channel */
return 5;
else if((flags & DTS_CHANNEL_MASK) == DTS_2F2R)
return 4;
else
switch(flags & (DTS_CHANNEL_MASK | DTS_LFE)){
case DTS_CHANNEL:
case DTS_STEREO:
case DTS_DOLBY:
return 2;
case DTS_2F2R:
return 4;
case DTS_MONO:
case DTS_3F:
case DTS_3F2R:
return 5;
case DTS_MONO | DTS_LFE:
case DTS_CHANNEL | DTS_LFE:
case DTS_STEREO | DTS_LFE:
case DTS_DOLBY | DTS_LFE:
case DTS_3F | DTS_LFE:
case DTS_2F2R | DTS_LFE:
case DTS_3F2R | DTS_LFE:
return 6;
}
return -1;
}
static int
......@@ -206,6 +170,7 @@ dts_decode_frame(AVCodecContext * avctx, void *data, int *data_size,
int len;
level_t level;
sample_t bias;
int nblocks;
int i;
*data_size = 0;
......@@ -237,7 +202,6 @@ dts_decode_frame(AVCodecContext * avctx, void *data, int *data_size,
s->bufpos = s->buf + length;
}
flags = 2; /* ???????????? */
level = CONVERT_LEVEL;
bias = CONVERT_BIAS;
......@@ -251,20 +215,18 @@ dts_decode_frame(AVCodecContext * avctx, void *data, int *data_size,
avctx->channels = channels_multi(flags);
avctx->bit_rate = bit_rate;
for(i = 0; i < dts_blocks_num(s->state); i++) {
int chans;
nblocks = dts_blocks_num(s->state);
for(i = 0; i < nblocks; i++) {
if(dts_block(s->state)) {
av_log(avctx, AV_LOG_ERROR, "dts_block() failed\n");
goto end;
}
chans = channels_multi(flags);
convert2s16_multi(dts_samples(s->state), out_samples,
flags & (DTS_CHANNEL_MASK | DTS_LFE));
convert2s16_multi(dts_samples(s->state), out_samples, flags);
out_samples += 256 * chans;
*data_size += 256 * sizeof(int16_t) * chans;
out_samples += 256 * avctx->channels;
*data_size += 256 * sizeof(int16_t) * avctx->channels;
}
end:
......
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