+++ /dev/null
-;
-; Copyright (c) 2010 The WebM project authors. All Rights Reserved.
-;
-; Use of this source code is governed by a BSD-style license
-; that can be found in the LICENSE file in the root of the source
-; tree. An additional intellectual property rights grant can be found
-; in the file PATENTS. All contributing project authors may
-; be found in the AUTHORS file in the root of the source tree.
-;
-
-
- EXPORT |vp8_decode_mb_tokens_v6|
-
- AREA |.text|, CODE, READONLY ; name this block of code
-
- INCLUDE asm_dec_offsets.asm
-
-l_qcoeff EQU 0
-l_i EQU 4
-l_type EQU 8
-l_stop EQU 12
-l_c EQU 16
-l_l_ptr EQU 20
-l_a_ptr EQU 24
-l_bc EQU 28
-l_coef_ptr EQU 32
-l_stacksize EQU 64
-
-
-;; constant offsets -- these should be created at build time
-c_block2above_offset EQU 25
-c_entropy_nodes EQU 11
-c_dct_eob_token EQU 11
-
-|vp8_decode_mb_tokens_v6| PROC
- stmdb sp!, {r4 - r11, lr}
- sub sp, sp, #l_stacksize
- mov r7, r1 ; type
- mov r9, r0 ; detoken
-
- ldr r1, [r9, #detok_current_bc]
- ldr r0, [r9, #detok_qcoeff_start_ptr]
- mov r11, #0 ; i
- mov r3, #16 ; stop
-
- cmp r7, #1 ; type ?= 1
- addeq r11, r11, #24 ; i = 24
- addeq r3, r3, #8 ; stop = 24
- addeq r0, r0, #3, 24 ; qcoefptr += 24*16
-
- str r0, [sp, #l_qcoeff]
- str r11, [sp, #l_i]
- str r7, [sp, #l_type]
- str r3, [sp, #l_stop]
- str r1, [sp, #l_bc]
-
- add lr, r9, r7, lsl #2 ; detoken + type*4
-
- ldr r8, [r1, #bool_decoder_user_buffer]
-
- ldr r10, [lr, #detok_coef_probs]
- ldr r5, [r1, #bool_decoder_count]
- ldr r6, [r1, #bool_decoder_range]
- ldr r4, [r1, #bool_decoder_value]
-
- str r10, [sp, #l_coef_ptr]
-
-BLOCK_LOOP
- ldr r3, [r9, #detok_ptr_block2leftabove]
- ldr r1, [r9, #detok_L]
- ldr r2, [r9, #detok_A]
- ldrb r12, [r3, r11]! ; block2left[i]
- ldrb r3, [r3, #c_block2above_offset]; block2above[i]
-
- cmp r7, #0 ; c = !type
- moveq r7, #1
- movne r7, #0
-
- ldrb r0, [r1, r12]! ; *(L += block2left[i])
- ldrb r3, [r2, r3]! ; *(A += block2above[i])
- mov lr, #c_entropy_nodes ; ENTROPY_NODES = 11
-
-; VP8_COMBINEENTROPYCONTETEXTS(t, *a, *l) => t = ((*a) != 0) + ((*l) !=0)
- cmp r0, #0 ; *l ?= 0
- movne r0, #1
- cmp r3, #0 ; *a ?= 0
- addne r0, r0, #1 ; t
-
- str r1, [sp, #l_l_ptr] ; save &l
- str r2, [sp, #l_a_ptr] ; save &a
- smlabb r0, r0, lr, r10 ; Prob = coef_probs + (t * ENTROPY_NODES)
- mov r1, #0 ; t = 0
- str r7, [sp, #l_c]
-
- ;align 4
-COEFF_LOOP
- ldr r3, [r9, #detok_ptr_coef_bands_x]
- ldr lr, [r9, #detok_coef_tree_ptr]
- ;STALL
- ldrb r3, [r3, r7] ; coef_bands_x[c]
- ;STALL
- ;STALL
- add r0, r0, r3 ; Prob += coef_bands_x[c]
-
-get_token_loop
- ldrb r2, [r0, +r1, asr #1] ; Prob[t >> 1]
- mov r3, r6, lsl #8 ; range << 8
- sub r3, r3, #256 ; (range << 8) - (1 << 8)
- mov r10, #1 ; 1
-
- smlawb r2, r3, r2, r10 ; split = 1 + (((range-1) * probability) >> 8)
-
- ldrb r12, [r8] ; load cx data byte in stall slot : r8 = bufptr
- ;++
-
- subs r3, r4, r2, lsl #24 ; value-(split<<24): used later to calculate shift for NORMALIZE
- addhs r1, r1, #1 ; t += 1
- movhs r4, r3 ; value -= bigsplit (split << 24)
- subhs r2, r6, r2 ; range -= split
- ; movlo r6, r2 ; range = split
-
- ldrsb r1, [lr, r1] ; t = onyx_coef_tree_ptr[t]
-
-; NORMALIZE
- clz r3, r2 ; vp8dx_bitreader_norm[range] + 24
- sub r3, r3, #24 ; vp8dx_bitreader_norm[range]
- subs r5, r5, r3 ; count -= shift
- mov r6, r2, lsl r3 ; range <<= shift
- mov r4, r4, lsl r3 ; value <<= shift
-
-; if count <= 0, += BR_COUNT; value |= *bufptr++ << (BR_COUNT-count); BR_COUNT = 8, but need to upshift values by +16
- addle r5, r5, #8 ; count += 8
- rsble r3, r5, #24 ; 24 - count
- addle r8, r8, #1 ; bufptr++
- orrle r4, r4, r12, lsl r3 ; value |= *bufptr << shift + 16
-
- cmp r1, #0 ; t ?= 0
- bgt get_token_loop ; while (t > 0)
-
- cmn r1, #c_dct_eob_token ; if(t == -DCT_EOB_TOKEN)
- beq END_OF_BLOCK ; break
-
- rsb lr, r1, #0 ; v = -t;
-
- cmp lr, #4 ; if(v > FOUR_TOKEN)
- ble SKIP_EXTRABITS
-
- ldr r3, [r9, #detok_teb_base_ptr]
- mov r11, #1 ; 1 in split = 1 + ... nope, v+= 1 << bits_count
- add r7, r3, lr, lsl #4 ; detok_teb_base_ptr + (v << 4)
-
- ldrsh lr, [r7, #tokenextrabits_min_val] ; v = teb_ptr->min_val
- ldrsh r0, [r7, #tokenextrabits_length] ; bits_count = teb_ptr->Length
-
-extrabits_loop
- add r3, r0, r7 ; &teb_ptr->Probs[bits_count]
-
- ldrb r2, [r3, #4] ; probability. why +4?
- mov r3, r6, lsl #8 ; range << 8
- sub r3, r3, #256 ; range << 8 + 1 << 8
-
- smlawb r2, r3, r2, r11 ; split = 1 + (((range-1) * probability) >> 8)
-
- ldrb r12, [r8] ; *bufptr
- ;++
-
- subs r10, r4, r2, lsl #24 ; value - (split<<24)
- movhs r4, r10 ; value = value - (split << 24)
- subhs r2, r6, r2 ; range = range - split
- addhs lr, lr, r11, lsl r0 ; v += ((UINT16)1<<bits_count)
-
-; NORMALIZE
- clz r3, r2 ; shift - leading zeros in split
- sub r3, r3, #24 ; don't count first 3 bytes
- subs r5, r5, r3 ; count -= shift
- mov r6, r2, lsl r3 ; range = range << shift
- mov r4, r4, lsl r3 ; value <<= shift
-
- addle r5, r5, #8 ; count += BR_COUNT
- addle r8, r8, #1 ; bufptr++
- rsble r3, r5, #24 ; BR_COUNT - count
- orrle r4, r4, r12, lsl r3 ; value |= *bufptr << (BR_COUNT - count)
-
- subs r0, r0, #1 ; bits_count --
- bpl extrabits_loop
-
-
-SKIP_EXTRABITS
- ldr r11, [sp, #l_qcoeff]
- ldr r0, [sp, #l_coef_ptr] ; Prob = coef_probs
-
- cmp r1, #0 ; check for nonzero token - if (t)
- beq SKIP_EOB_CHECK ; if t is zero, we will skip the eob table chec
-
- add r3, r6, #1 ; range + 1
- mov r2, r3, lsr #1 ; split = (range + 1) >> 1
-
- subs r3, r4, r2, lsl #24 ; value - (split<<24)
- movhs r4, r3 ; value -= (split << 24)
- subhs r2, r6, r2 ; range -= split
- mvnhs r3, lr ; -v
- addhs lr, r3, #1 ; v = (v ^ -1) + 1
-
-; NORMALIZE
- clz r3, r2 ; leading 0s in split
- sub r3, r3, #24 ; shift
- subs r5, r5, r3 ; count -= shift
- mov r6, r2, lsl r3 ; range <<= shift
- mov r4, r4, lsl r3 ; value <<= shift
- ldrleb r2, [r8], #1 ; *(bufptr++)
- addle r5, r5, #8 ; count += 8
- rsble r3, r5, #24 ; BR_COUNT - count
- orrle r4, r4, r2, lsl r3 ; value |= *bufptr << (BR_COUNT - count)
-
- add r0, r0, #11 ; Prob += ENTROPY_NODES (11)
-
- cmn r1, #1 ; t < -ONE_TOKEN
-
- addlt r0, r0, #11 ; Prob += ENTROPY_NODES (11)
-
- mvn r1, #1 ; t = -1 ???? C is -2
-
-SKIP_EOB_CHECK
- ldr r7, [sp, #l_c] ; c
- ldr r3, [r9, #detok_scan]
- add r1, r1, #2 ; t+= 2
- cmp r7, #15 ; c should will be one higher
-
- ldr r3, [r3, +r7, lsl #2] ; scan[c] this needs pre-inc c value
- add r7, r7, #1 ; c++
- add r3, r11, r3, lsl #1 ; qcoeff + scan[c]
-
- str r7, [sp, #l_c] ; store c
- strh lr, [r3] ; qcoef_ptr[scan[c]] = v
-
- blt COEFF_LOOP
-
- sub r7, r7, #1 ; if(t != -DCT_EOB_TOKEN) --c
-
-END_OF_BLOCK
- ldr r3, [sp, #l_type] ; type
- ldr r10, [sp, #l_coef_ptr] ; coef_ptr
- ldr r0, [sp, #l_qcoeff] ; qcoeff
- ldr r11, [sp, #l_i] ; i
- ldr r12, [sp, #l_stop] ; stop
-
- cmp r3, #0 ; type ?= 0
- moveq r1, #1
- movne r1, #0
- add r3, r11, r9 ; detok + i
-
- cmp r7, r1 ; c ?= !type
- strb r7, [r3, #detok_eob] ; eob[i] = c
-
- ldr r7, [sp, #l_l_ptr] ; l
- ldr r2, [sp, #l_a_ptr] ; a
- movne r3, #1 ; t
- moveq r3, #0
-
- add r0, r0, #32 ; qcoeff += 32 (16 * 2?)
- add r11, r11, #1 ; i++
- strb r3, [r7] ; *l = t
- strb r3, [r2] ; *a = t
- str r0, [sp, #l_qcoeff] ; qcoeff
- str r11, [sp, #l_i] ; i
-
- cmp r11, r12 ; i < stop
- ldr r7, [sp, #l_type] ; type
-
- blt BLOCK_LOOP
-
- cmp r11, #25 ; i ?= 25
- bne ln2_decode_mb_to
-
- ldr r12, [r9, #detok_qcoeff_start_ptr]
- ldr r10, [r9, #detok_coef_probs]
- mov r7, #0 ; type/i = 0
- mov r3, #16 ; stop = 16
- str r12, [sp, #l_qcoeff] ; qcoeff_ptr = qcoeff_start_ptr
- str r7, [sp, #l_i]
- str r7, [sp, #l_type]
- str r3, [sp, #l_stop]
-
- str r10, [sp, #l_coef_ptr] ; coef_probs = coef_probs[type=0]
-
- b BLOCK_LOOP
-
-ln2_decode_mb_to
- cmp r11, #16 ; i ?= 16
- bne ln1_decode_mb_to
-
- mov r10, #detok_coef_probs
- add r10, r10, #2*4 ; coef_probs[type]
- ldr r10, [r9, r10] ; detok + detok_coef_probs[type]
-
- mov r7, #2 ; type = 2
- mov r3, #24 ; stop = 24
-
- str r7, [sp, #l_type]
- str r3, [sp, #l_stop]
-
- str r10, [sp, #l_coef_ptr] ; coef_probs = coef_probs[type]
- b BLOCK_LOOP
-
-ln1_decode_mb_to
- ldr r2, [sp, #l_bc]
- mov r0, #0
- nop
-
- str r8, [r2, #bool_decoder_user_buffer]
- str r5, [r2, #bool_decoder_count]
- str r4, [r2, #bool_decoder_value]
- str r6, [r2, #bool_decoder_range]
-
- add sp, sp, #l_stacksize
- ldmia sp!, {r4 - r11, pc}
-
- ENDP ; |vp8_decode_mb_tokens_v6|
-
- END
}
}
-#if CONFIG_ARM_ASM_DETOK
-/* mashup of vp8_block2left and vp8_block2above so we only need one pointer
- * for the assembly version.
- */
-DECLARE_ALIGNED(16, const UINT8, vp8_block2leftabove[25*2]) =
-{
- /* vp8_block2left */
- 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8,
- /* vp8_block2above */
- 0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 2, 3, 4, 5, 4, 5, 6, 7, 6, 7, 8
-};
-
-void vp8_init_detokenizer(VP8D_COMP *dx)
-{
- const VP8_COMMON *const oc = & dx->common;
- MACROBLOCKD *x = & dx->mb;
-
- dx->detoken.vp8_coef_tree_ptr = vp8_coef_tree;
- dx->detoken.ptr_block2leftabove = vp8_block2leftabove;
- dx->detoken.ptr_coef_bands_x = vp8_coef_bands_x;
- dx->detoken.scan = vp8_default_zig_zag1d;
- dx->detoken.teb_base_ptr = vp8d_token_extra_bits2;
- dx->detoken.qcoeff_start_ptr = &x->qcoeff[0];
-
- dx->detoken.coef_probs[0] = (oc->fc.coef_probs [0] [ 0 ] [0]);
- dx->detoken.coef_probs[1] = (oc->fc.coef_probs [1] [ 0 ] [0]);
- dx->detoken.coef_probs[2] = (oc->fc.coef_probs [2] [ 0 ] [0]);
- dx->detoken.coef_probs[3] = (oc->fc.coef_probs [3] [ 0 ] [0]);
-}
-#endif
-
DECLARE_ALIGNED(16, extern const unsigned char, vp8dx_bitreader_norm[256]);
#define FILL \
if(count < 0) \
}\
NORMALIZE
-#if CONFIG_ARM_ASM_DETOK
-int vp8_decode_mb_tokens(VP8D_COMP *dx, MACROBLOCKD *x)
-{
- int eobtotal = 0;
- int i, type;
-
- dx->detoken.current_bc = x->current_bc;
- dx->detoken.A = x->above_context;
- dx->detoken.L = x->left_context;
-
- type = 3;
-
- if (x->mode_info_context->mbmi.mode != B_PRED && x->mode_info_context->mbmi.mode != SPLITMV)
- {
- type = 1;
- eobtotal -= 16;
- }
-
- vp8_decode_mb_tokens_v6(&dx->detoken, type);
-
- for (i = 0; i < 25; i++)
- {
- x->eobs[i] = dx->detoken.eob[i];
- eobtotal += dx->detoken.eob[i];
- }
-
- return eobtotal;
-}
-#else
int vp8_decode_mb_tokens(VP8D_COMP *dx, MACROBLOCKD *x)
{
ENTROPY_CONTEXT *A = (ENTROPY_CONTEXT *)x->above_context;
return eobtotal;
}
-#endif /*!CONFIG_ASM_DETOK*/
projects / profile / ivi / libvpx.git / commitdiff