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add last backwards-compatible version

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This commit is contained in:
Mikah Chapman
2021-12-14 00:33:46 -07:00
parent 68b10d413b
commit b0dd3f07f3
335 changed files with 4746 additions and 19627 deletions
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42
foobar2000/helpers/bitreader_helper.h
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@@ -2,11 +2,11 @@
namespace bitreader_helper {
inline static size_t extract_bit(const uint8_t * p_stream,size_t p_offset) {
inline static size_t extract_bit(const t_uint8 * p_stream,size_t p_offset) {
return (p_stream[p_offset>>3] >> (7-(p_offset&7)))&1;
}
inline static size_t extract_int(const uint8_t * p_stream,size_t p_base,size_t p_width) {
inline static size_t extract_int(const t_uint8 * p_stream,size_t p_base,size_t p_width) {
size_t ret = 0;
size_t offset = p_base;
for(size_t bit=0;bit<p_width;bit++) {
@@ -15,19 +15,6 @@ namespace bitreader_helper {
}
return ret;
}
inline static void write_bit( uint8_t * p_stream, size_t p_offset, size_t bit ) {
size_t bshift = 7 - (p_offset&7);
size_t mask = 1 << bshift;
uint8_t & b = p_stream[p_offset>>3];
b = (b & ~mask) | ((bit&1) << bshift);
}
inline static void write_int( uint8_t * p_stream, size_t p_base, size_t p_width, size_t p_value) {
size_t offset = p_base;
size_t val = p_value;
for( size_t bit = 0; bit < p_width; ++ bit ) {
write_bit( p_stream, offset++, val >> (p_width - bit - 1));
}
}
class bitreader
{
@@ -42,31 +29,18 @@ public:
m_bitptr += p_bits;
}
template<typename t_ret>
t_ret peek_t(t_size p_bits) const {
size_t ptr = m_bitptr;
t_ret read_t(t_size p_bits) {
t_ret ret = 0;
for(t_size bit=0;bit<p_bits;bit++)
{
ret <<= 1;
ret |= (m_ptr[ptr >>3] >> (7-(ptr &7)))&1;
ptr++;
ret |= (m_ptr[m_bitptr>>3] >> (7-(m_bitptr&7)))&1;
m_bitptr++;
}
return ret;
}
template<typename t_ret>
t_ret read_t(t_size p_bits) {
t_ret ret = peek_t<t_ret>(p_bits);
skip(p_bits);
return ret;
}
size_t peek(size_t bits) const {
return peek_t<size_t>(bits);
}
t_size read(t_size p_bits) {return read_t<t_size>(p_bits);}
inline t_size get_bitptr() const {return m_bitptr;}
@@ -131,10 +105,6 @@ public:
m_reader.skip(p_bits);
}
size_t peek(size_t bits) {
if (bits > m_remaining) throw exception_io_data_truncation();
return m_reader.peek(bits);
}
t_size read(t_size p_bits)
{
if (p_bits > m_remaining) throw exception_io_data_truncation();
@@ -151,4 +121,4 @@ inline static t_size extract_bits(const t_uint8 * p_buffer,t_size p_base,t_size
return bitreader(p_buffer,p_base).read(p_count);
}
}
}