From f776899a17dce32ad7fb9231d98f15558f37cc3f Mon Sep 17 00:00:00 2001 From: Luca Barbato Date: Sat, 15 Jun 2013 10:19:51 +0200 Subject: [PATCH] bitstream: K&R formatting cosmetics --- libavcodec/bitstream.c | 144 +++++++++++++++++++++++++------------------------ 1 file changed, 74 insertions(+), 70 deletions(-) diff --git a/libavcodec/bitstream.c b/libavcodec/bitstream.c index 2c8692a..f9f2d3a 100644 --- a/libavcodec/bitstream.c +++ b/libavcodec/bitstream.c @@ -44,81 +44,84 @@ const uint8_t ff_log2_run[41]={ void avpriv_align_put_bits(PutBitContext *s) { - put_bits(s,s->bit_left & 7,0); + put_bits(s, s->bit_left & 7, 0); } -void avpriv_put_string(PutBitContext *pb, const char *string, int terminate_string) +void avpriv_put_string(PutBitContext *pb, const char *string, + int terminate_string) { - while(*string){ + while (*string) { put_bits(pb, 8, *string); string++; } - if(terminate_string) + if (terminate_string) put_bits(pb, 8, 0); } void avpriv_copy_bits(PutBitContext *pb, const uint8_t *src, int length) { - int words= length>>4; - int bits= length&15; + int words = length >> 4; + int bits = length & 15; int i; - if(length==0) return; + if (length == 0) + return; - if(CONFIG_SMALL || words < 16 || put_bits_count(pb)&7){ - for(i=0; i>(16-bits)); + put_bits(pb, bits, AV_RB16(src + 2 * words) >> (16 - bits)); } /* VLC decoding */ -#define GET_DATA(v, table, i, wrap, size) \ -{\ - const uint8_t *ptr = (const uint8_t *)table + i * wrap;\ - switch(size) {\ - case 1:\ - v = *(const uint8_t *)ptr;\ - break;\ - case 2:\ - v = *(const uint16_t *)ptr;\ - break;\ - default:\ - v = *(const uint32_t *)ptr;\ - break;\ - }\ +#define GET_DATA(v, table, i, wrap, size) \ +{ \ + const uint8_t *ptr = (const uint8_t *)table + i * wrap; \ + switch(size) { \ + case 1: \ + v = *(const uint8_t *)ptr; \ + break; \ + case 2: \ + v = *(const uint16_t *)ptr; \ + break; \ + default: \ + v = *(const uint32_t *)ptr; \ + break; \ + } \ } static int alloc_table(VLC *vlc, int size, int use_static) { - int index; - index = vlc->table_size; + int index = vlc->table_size; + vlc->table_size += size; if (vlc->table_size > vlc->table_allocated) { - if(use_static) + if (use_static) abort(); // cannot do anything, init_vlc() is used with too little memory vlc->table_allocated += (1 << vlc->bits); - vlc->table = av_realloc(vlc->table, - sizeof(VLC_TYPE) * 2 * vlc->table_allocated); + vlc->table = av_realloc(vlc->table, sizeof(VLC_TYPE) * 2 * vlc->table_allocated); if (!vlc->table) return -1; } return index; } -static av_always_inline uint32_t bitswap_32(uint32_t x) { - return (uint32_t)ff_reverse[x&0xFF]<<24 - | (uint32_t)ff_reverse[(x>>8)&0xFF]<<16 - | (uint32_t)ff_reverse[(x>>16)&0xFF]<<8 - | (uint32_t)ff_reverse[x>>24]; +static av_always_inline uint32_t bitswap_32(uint32_t x) +{ + return (uint32_t)ff_reverse[ x & 0xFF] << 24 | + (uint32_t)ff_reverse[(x >> 8) & 0xFF] << 16 | + (uint32_t)ff_reverse[(x >> 16) & 0xFF] << 8 | + (uint32_t)ff_reverse[ x >> 24]; } typedef struct { @@ -131,10 +134,9 @@ typedef struct { static int compare_vlcspec(const void *a, const void *b) { - const VLCcode *sa=a, *sb=b; + const VLCcode *sa = a, *sb = b; return (sa->code >> 1) - (sb->code >> 1); } - /** * Build VLC decoding tables suitable for use with get_vlc(). * @@ -171,8 +173,8 @@ static int build_table(VLC *vlc, int table_nb_bits, int nb_codes, /* first pass: map codes and compute auxiliary table sizes */ for (i = 0; i < nb_codes; i++) { - n = codes[i].bits; - code = codes[i].code; + n = codes[i].bits; + code = codes[i].code; symbol = codes[i].symbol; av_dlog(NULL, "i=%d n=%d code=0x%x\n", i, n, code); if (n <= table_nb_bits) { @@ -257,48 +259,48 @@ static int build_table(VLC *vlc, int table_nb_bits, int nb_codes, with av_free_static(), 0 if ff_free_vlc() will be used. */ int ff_init_vlc_sparse(VLC *vlc, int nb_bits, int nb_codes, - const void *bits, int bits_wrap, int bits_size, - const void *codes, int codes_wrap, int codes_size, - const void *symbols, int symbols_wrap, int symbols_size, - int flags) + const void *bits, int bits_wrap, int bits_size, + const void *codes, int codes_wrap, int codes_size, + const void *symbols, int symbols_wrap, int symbols_size, + int flags) { VLCcode *buf; int i, j, ret; vlc->bits = nb_bits; - if(flags & INIT_VLC_USE_NEW_STATIC){ - if(vlc->table_size && vlc->table_size == vlc->table_allocated){ + if (flags & INIT_VLC_USE_NEW_STATIC) { + if (vlc->table_size && vlc->table_size == vlc->table_allocated) { return 0; - }else if(vlc->table_size){ + } else if (vlc->table_size) { abort(); // fatal error, we are called on a partially initialized table } - }else { - vlc->table = NULL; + } else { + vlc->table = NULL; vlc->table_allocated = 0; - vlc->table_size = 0; + vlc->table_size = 0; } av_dlog(NULL, "build table nb_codes=%d\n", nb_codes); - buf = av_malloc((nb_codes+1)*sizeof(VLCcode)); + buf = av_malloc((nb_codes + 1) * sizeof(VLCcode)); assert(symbols_size <= 2 || !symbols); j = 0; -#define COPY(condition)\ - for (i = 0; i < nb_codes; i++) {\ - GET_DATA(buf[j].bits, bits, i, bits_wrap, bits_size);\ - if (!(condition))\ - continue;\ - GET_DATA(buf[j].code, codes, i, codes_wrap, codes_size);\ - if (flags & INIT_VLC_LE)\ - buf[j].code = bitswap_32(buf[j].code);\ - else\ - buf[j].code <<= 32 - buf[j].bits;\ - if (symbols)\ - GET_DATA(buf[j].symbol, symbols, i, symbols_wrap, symbols_size)\ - else\ - buf[j].symbol = i;\ - j++;\ +#define COPY(condition) \ + for (i = 0; i < nb_codes; i++) { \ + GET_DATA(buf[j].bits, bits, i, bits_wrap, bits_size); \ + if (!(condition)) \ + continue; \ + GET_DATA(buf[j].code, codes, i, codes_wrap, codes_size); \ + if (flags & INIT_VLC_LE) \ + buf[j].code = bitswap_32(buf[j].code); \ + else \ + buf[j].code <<= 32 - buf[j].bits; \ + if (symbols) \ + GET_DATA(buf[j].symbol, symbols, i, symbols_wrap, symbols_size) \ + else \ + buf[j].symbol = i; \ + j++; \ } COPY(buf[j].bits > nb_bits); // qsort is the slowest part of init_vlc, and could probably be improved or avoided @@ -313,8 +315,10 @@ int ff_init_vlc_sparse(VLC *vlc, int nb_bits, int nb_codes, av_freep(&vlc->table); return -1; } - if((flags & INIT_VLC_USE_NEW_STATIC) && vlc->table_size != vlc->table_allocated) - av_log(NULL, AV_LOG_ERROR, "needed %d had %d\n", vlc->table_size, vlc->table_allocated); + if ((flags & INIT_VLC_USE_NEW_STATIC) && + vlc->table_size != vlc->table_allocated) + av_log(NULL, AV_LOG_ERROR, "needed %d had %d\n", + vlc->table_size, vlc->table_allocated); return 0; } -- 2.7.4