diff options
| -rw-r--r-- | libavcodec/arm/dca.h | 55 | ||||
| -rw-r--r-- | libavcodec/dca.c | 27 |
2 files changed, 72 insertions, 10 deletions
diff --git a/libavcodec/arm/dca.h b/libavcodec/arm/dca.h index 38c8d1f9cc..9ff7f7c75e 100644 --- a/libavcodec/arm/dca.h +++ b/libavcodec/arm/dca.h @@ -23,6 +23,61 @@ #include <stdint.h> #include "config.h" +#include "libavutil/intmath.h" + +#if HAVE_ARMV6 && HAVE_INLINE_ASM + +#define decode_blockcodes decode_blockcodes +static inline int decode_blockcodes(int code1, int code2, int levels, + int *values) +{ + int v0, v1, v2, v3, v4, v5; + + __asm__ ("smmul %8, %14, %18 \n" + "smmul %11, %15, %18 \n" + "smlabb %14, %8, %17, %14 \n" + "smlabb %15, %11, %17, %15 \n" + "smmul %9, %8, %18 \n" + "smmul %12, %11, %18 \n" + "sub %14, %14, %16, lsr #1 \n" + "sub %15, %15, %16, lsr #1 \n" + "smlabb %8, %9, %17, %8 \n" + "smlabb %11, %12, %17, %11 \n" + "smmul %10, %9, %18 \n" + "smmul %13, %12, %18 \n" + "str %14, %0 \n" + "str %15, %4 \n" + "sub %8, %8, %16, lsr #1 \n" + "sub %11, %11, %16, lsr #1 \n" + "smlabb %9, %10, %17, %9 \n" + "smlabb %12, %13, %17, %12 \n" + "smmul %14, %10, %18 \n" + "smmul %15, %13, %18 \n" + "str %8, %1 \n" + "str %11, %5 \n" + "sub %9, %9, %16, lsr #1 \n" + "sub %12, %12, %16, lsr #1 \n" + "smlabb %10, %14, %17, %10 \n" + "smlabb %13, %15, %17, %13 \n" + "str %9, %2 \n" + "str %12, %6 \n" + "sub %10, %10, %16, lsr #1 \n" + "sub %13, %13, %16, lsr #1 \n" + "str %10, %3 \n" + "str %13, %7 \n" + : "=m"(values[0]), "=m"(values[1]), + "=m"(values[2]), "=m"(values[3]), + "=m"(values[4]), "=m"(values[5]), + "=m"(values[6]), "=m"(values[7]), + "=&r"(v0), "=&r"(v1), "=&r"(v2), + "=&r"(v3), "=&r"(v4), "=&r"(v5), + "+&r"(code1), "+&r"(code2) + : "r"(levels - 1), "r"(-levels), "r"(ff_inverse[levels])); + + return code1 | code2; +} + +#endif #if HAVE_NEON && HAVE_INLINE_ASM && HAVE_ASM_MOD_Y diff --git a/libavcodec/dca.c b/libavcodec/dca.c index 7f7bcf9cfd..b310638dc1 100644 --- a/libavcodec/dca.c +++ b/libavcodec/dca.c @@ -1038,6 +1038,7 @@ static void dca_downmix(float *samples, int srcfmt, } +#ifndef decode_blockcodes /* Very compact version of the block code decoder that does not use table * look-up but is slightly slower */ static int decode_blockcode(int code, int levels, int *values) @@ -1051,13 +1052,15 @@ static int decode_blockcode(int code, int levels, int *values) code = div; } - if (code == 0) - return 0; - else { - av_log(NULL, AV_LOG_ERROR, "ERROR: block code look-up failed\n"); - return AVERROR_INVALIDDATA; - } + return code; +} + +static int decode_blockcodes(int code1, int code2, int levels, int *values) +{ + return decode_blockcode(code1, levels, values) | + decode_blockcode(code2, levels, values + 4); } +#endif static const uint8_t abits_sizes[7] = { 7, 10, 12, 13, 15, 17, 19 }; static const uint8_t abits_levels[7] = { 3, 5, 7, 9, 13, 17, 25 }; @@ -1125,16 +1128,20 @@ static int dca_subsubframe(DCAContext * s, int base_channel, int block_index) if (abits >= 11 || !dca_smpl_bitalloc[abits].vlc[sel].table){ if (abits <= 7){ /* Block code */ - int block_code1, block_code2, size, levels; + int block_code1, block_code2, size, levels, err; size = abits_sizes[abits-1]; levels = abits_levels[abits-1]; block_code1 = get_bits(&s->gb, size); - /* FIXME Should test return value */ - decode_blockcode(block_code1, levels, block); block_code2 = get_bits(&s->gb, size); - decode_blockcode(block_code2, levels, &block[4]); + err = decode_blockcodes(block_code1, block_code2, + levels, block); + if (err) { + av_log(s->avctx, AV_LOG_ERROR, + "ERROR: block code look-up failed\n"); + return AVERROR_INVALIDDATA; + } }else{ /* no coding */ for (m = 0; m < 8; m++) |