diff options
| -rw-r--r-- | lib/ffmpeg/libavcodec/arm/ac3dsp_armv6.S | 15 | ||||
| -rw-r--r-- | lib/ffmpeg/patches/0033-ARM-ac3-fix-ac3_bit_alloc_calc_bap_armv6.patch | 62 |
2 files changed, 69 insertions, 8 deletions
diff --git a/lib/ffmpeg/libavcodec/arm/ac3dsp_armv6.S b/lib/ffmpeg/libavcodec/arm/ac3dsp_armv6.S index 97099d658c..5d9c92d2f6 100644 --- a/lib/ffmpeg/libavcodec/arm/ac3dsp_armv6.S +++ b/lib/ffmpeg/libavcodec/arm/ac3dsp_armv6.S @@ -34,24 +34,23 @@ function ff_ac3_bit_alloc_calc_bap_armv6, export=1 add r0, r0, r4, lsl #1 @ mask + band add r4, lr, r4 add r7, r7, r2 @ bap + start - ldrb r10, [r4], #1 1: ldrsh r9, [r0], #2 @ mask[band] mov r8, #0xff0 sub r9, r9, r12 @ - snr_offset - mov r11, r10 - ldrb r10, [r4], #1 @ band_start_tab[band++] + ldrb r10, [r4, #1]! @ band_start_tab[++band] subs r9, r9, r5 @ - floor it lt movlt r9, #0 cmp r10, r3 @ - end and r9, r9, r8, lsl #1 @ & 0x1fe0 ite gt - subgt r8, r3, r11 - suble r8, r10, r11 + subgt r8, r3, r2 + suble r8, r10, r2 + mov r2, r10 add r9, r9, r5 @ + floor => m tst r8, #1 - add r2, r7, r8 + add r11, r7, r8 bne 3f b 5f 2: @@ -65,9 +64,9 @@ function ff_ac3_bit_alloc_calc_bap_armv6, export=1 ldrb lr, [r6, lr] strb r8, [r7], #1 @ bap[bin] strb lr, [r7], #1 -5: cmp r7, r2 +5: cmp r7, r11 blo 2b - cmp r3, r11 + cmp r3, r10 bgt 1b pop {r4-r11,pc} 3: diff --git a/lib/ffmpeg/patches/0033-ARM-ac3-fix-ac3_bit_alloc_calc_bap_armv6.patch b/lib/ffmpeg/patches/0033-ARM-ac3-fix-ac3_bit_alloc_calc_bap_armv6.patch new file mode 100644 index 0000000000..fb5c6d091a --- /dev/null +++ b/lib/ffmpeg/patches/0033-ARM-ac3-fix-ac3_bit_alloc_calc_bap_armv6.patch @@ -0,0 +1,62 @@ +From cd2f98f365dfd83f0debac030413e57a73c7ecd5 Mon Sep 17 00:00:00 2001 +From: Mans Rullgard <mans@mansr.com> +Date: Wed, 1 Feb 2012 22:25:10 +0000 +Subject: [PATCH] ARM: ac3: fix ac3_bit_alloc_calc_bap_armv6 + +This function was broken when the start bin was not at the start +of a band. + +Signed-off-by: Mans Rullgard <mans@mansr.com> +--- + libavcodec/arm/ac3dsp_armv6.S | 15 +++++++-------- + 1 file changed, 7 insertions(+), 8 deletions(-) + +diff --git a/libavcodec/arm/ac3dsp_armv6.S b/libavcodec/arm/ac3dsp_armv6.S +index b6aee86..df8bfba 100644 +--- a/libavcodec/arm/ac3dsp_armv6.S ++++ b/libavcodec/arm/ac3dsp_armv6.S +@@ -34,24 +34,23 @@ function ff_ac3_bit_alloc_calc_bap_armv6, export=1 + add r0, r0, r4, lsl #1 @ mask + band + add r4, lr, r4 + add r7, r7, r2 @ bap + start +- ldrb r10, [r4], #1 + 1: + ldrsh r9, [r0], #2 @ mask[band] + mov r8, #0xff0 + sub r9, r9, r12 @ - snr_offset +- mov r11, r10 +- ldrb r10, [r4], #1 @ band_start_tab[band++] ++ ldrb r10, [r4, #1]! @ band_start_tab[++band] + subs r9, r9, r5 @ - floor + it lt + movlt r9, #0 + cmp r10, r3 @ - end + and r9, r9, r8, lsl #1 @ & 0x1fe0 + ite gt +- subgt r8, r3, r11 +- suble r8, r10, r11 ++ subgt r8, r3, r2 ++ suble r8, r10, r2 ++ mov r2, r10 + add r9, r9, r5 @ + floor => m + tst r8, #1 +- add r2, r7, r8 ++ add r11, r7, r8 + bne 3f + b 5f + 2: +@@ -65,9 +64,9 @@ function ff_ac3_bit_alloc_calc_bap_armv6, export=1 + ldrb lr, [r6, lr] + strb r8, [r7], #1 @ bap[bin] + strb lr, [r7], #1 +-5: cmp r7, r2 ++5: cmp r7, r11 + blo 2b +- cmp r3, r11 ++ cmp r3, r10 + bgt 1b + pop {r4-r11,pc} + 3: +-- +1.7.10.4 + |