55 files changed, 11471 insertions, 2282 deletions
diff --git a/drivers/amvdec_ports/utils/put_bits.h b/drivers/amvdec_ports/utils/put_bits.h new file mode 100644 index 0000000..8b2aa15 --- a/dev/null +++ b/drivers/amvdec_ports/utils/put_bits.h @@ -0,0 +1,323 @@ +#ifndef AVCODEC_PUT_BITS_H +#define AVCODEC_PUT_BITS_H + +#include <linux/kernel.h> +#include <linux/types.h> +#include "common.h" + +struct put_bits_context { + u32 bit_buf; + int bit_left; + u8 *buf; + u8 *buf_ptr; + u8 *buf_end; + int size_in_bits; +}; + +/** + * Initialize the struct put_bits_context s. + * + * @param buffer the buffer where to put bits + * @param buffer_size the size in bytes of buffer + */ +static inline void init_put_bits(struct put_bits_context *s, + u8 *buffer, int buffer_size) +{ + if (buffer_size < 0) { + buffer_size = 0; + buffer = NULL; + } + + s->size_in_bits = 8 * buffer_size; + s->buf = buffer; + s->buf_end = s->buf + buffer_size; + s->buf_ptr = s->buf; + s->bit_left = 32; + s->bit_buf = 0; +} + +/** + * Rebase the bit writer onto a reallocated buffer. + * + * @param buffer the buffer where to put bits + * @param buffer_size the size in bytes of buffer, + * must be larger than the previous size + */ +static inline void rebase_put_bits(struct put_bits_context *s, + u8 *buffer, int buffer_size) +{ + s->buf_end = buffer + buffer_size; + s->buf_ptr = buffer + (s->buf_ptr - s->buf); + s->buf = buffer; + s->size_in_bits = 8 * buffer_size; +} + +/** + * @return the total number of bits written to the bitstream. + */ +static inline int put_bits_count(struct put_bits_context *s) +{ + return (s->buf_ptr - s->buf) * 8 + 32 - s->bit_left; +} + +/** + * @return the number of bits available in the bitstream. + */ +static inline int put_bits_left(struct put_bits_context* s) +{ + return (s->buf_end - s->buf_ptr) * 8 - 32 + s->bit_left; +} + +/** + * Pad the end of the output stream with zeros. + */ +static inline void flush_put_bits(struct put_bits_context *s) +{ +#ifndef BITSTREAM_WRITER_LE + if (s->bit_left < 32) + s->bit_buf <<= s->bit_left; +#endif + while (s->bit_left < 32) { +#ifdef BITSTREAM_WRITER_LE + *s->buf_ptr++ = s->bit_buf; + s->bit_buf >>= 8; +#else + *s->buf_ptr++ = s->bit_buf >> 24; + s->bit_buf <<= 8; +#endif + s->bit_left += 8; + } + s->bit_left = 32; + s->bit_buf = 0; +} + +static inline void flush_put_bits_le(struct put_bits_context *s) +{ + while (s->bit_left < 32) { + *s->buf_ptr++ = s->bit_buf; + s->bit_buf >>= 8; + s->bit_left += 8; + } + s->bit_left = 32; + s->bit_buf = 0; +} + +#ifdef BITSTREAM_WRITER_LE +#define avpriv_align_put_bits align_put_bits_unsupported_here +#define avpriv_put_string ff_put_string_unsupported_here +#define avpriv_copy_bits avpriv_copy_bits_unsupported_here +#else +/** + * Pad the bitstream with zeros up to the next byte boundary. + */ +void avpriv_align_put_bits(struct put_bits_context *s); + +/** + * Put the string string in the bitstream. + * + * @param terminate_string 0-terminates the written string if value is 1 + */ +void avpriv_put_string(struct put_bits_context *pb, + const char *string, int terminate_string); + +/** + * Copy the content of src to the bitstream. + * + * @param length the number of bits of src to copy + */ +void avpriv_copy_bits(struct put_bits_context *pb, const u8 *src, int length); +#endif + +/** + * Write up to 31 bits into a bitstream. + * Use put_bits32 to write 32 bits. + */ +static inline void put_bits(struct put_bits_context *s, int n, u32 value) +{ + u32 bit_buf; + int bit_left; + + bit_buf = s->bit_buf; + bit_left = s->bit_left; + + /* XXX: optimize */ +#ifdef BITSTREAM_WRITER_LE + bit_buf |= value << (32 - bit_left); + if (n >= bit_left) { + if (3 < s->buf_end - s->buf_ptr) { + AV_WL32(s->buf_ptr, bit_buf); + s->buf_ptr += 4; + } else { + pr_err("Internal error, put_bits buffer too small\n"); + } + bit_buf = value >> bit_left; + bit_left += 32; + } + bit_left -= n; +#else + if (n < bit_left) { + bit_buf = (bit_buf << n) | value; + bit_left -= n; + } else { + bit_buf <<= bit_left; + bit_buf |= value >> (n - bit_left); + if (3 < s->buf_end - s->buf_ptr) { + AV_WB32(s->buf_ptr, bit_buf); + s->buf_ptr += 4; + } else { + pr_err("Internal error, put_bits buffer too small\n"); + } + bit_left += 32 - n; + bit_buf = value; + } +#endif + s->bit_buf = bit_buf; + s->bit_left = bit_left; +} + +static inline void put_bits_le(struct put_bits_context *s, int n, u32 value) +{ + u32 bit_buf; + int bit_left; + + bit_buf = s->bit_buf; + bit_left = s->bit_left; + + bit_buf |= value << (32 - bit_left); + if (n >= bit_left) { + if (3 < s->buf_end - s->buf_ptr) { + AV_WL32(s->buf_ptr, bit_buf); + s->buf_ptr += 4; + } else { + pr_err("Internal error, put_bits buffer too small\n"); + } + bit_buf = value >> bit_left; + bit_left += 32; + } + bit_left -= n; + + s->bit_buf = bit_buf; + s->bit_left = bit_left; +} + +static inline u32 av_mod_uintp2(u32 a, u32 p) +{ + return a & ((1 << p) - 1); +} + +static inline void put_sbits(struct put_bits_context *pb, int n, int32_t value) +{ + put_bits(pb, n, av_mod_uintp2(value, n)); +} + +/** + * Write exactly 32 bits into a bitstream. + */ +static void put_bits32(struct put_bits_context *s, u32 value) +{ + u32 bit_buf; + int bit_left; + + bit_buf = s->bit_buf; + bit_left = s->bit_left; + +#ifdef BITSTREAM_WRITER_LE + bit_buf |= value << (32 - bit_left); + if (3 < s->buf_end - s->buf_ptr) { + AV_WL32(s->buf_ptr, bit_buf); + s->buf_ptr += 4; + } else { + pr_err("Internal error, put_bits buffer too small\n"); + } + bit_buf = (uint64_t)value >> bit_left; +#else + bit_buf = (uint64_t)bit_buf << bit_left; + bit_buf |= value >> (32 - bit_left); + if (3 < s->buf_end - s->buf_ptr) { + AV_WB32(s->buf_ptr, bit_buf); + s->buf_ptr += 4; + } else { + pr_err("Internal error, put_bits buffer too small\n"); + } + bit_buf = value; +#endif + + s->bit_buf = bit_buf; + s->bit_left = bit_left; +} + +/** + * Write up to 64 bits into a bitstream. + */ +static inline void put_bits64(struct put_bits_context *s, int n, uint64_t value) +{ + if (n < 32) + put_bits(s, n, value); + else if (n == 32) + put_bits32(s, value); + else if (n < 64) { + u32 lo = value & 0xffffffff; + u32 hi = value >> 32; +#ifdef BITSTREAM_WRITER_LE + put_bits32(s, lo); + put_bits(s, n - 32, hi); +#else + put_bits(s, n - 32, hi); + put_bits32(s, lo); +#endif + } else { + u32 lo = value & 0xffffffff; + u32 hi = value >> 32; +#ifdef BITSTREAM_WRITER_LE + put_bits32(s, lo); + put_bits32(s, hi); +#else + put_bits32(s, hi); + put_bits32(s, lo); +#endif + } +} + +/** + * Return the pointer to the byte where the bitstream writer will put + * the next bit. + */ +static inline u8 *put_bits_ptr(struct put_bits_context *s) +{ + return s->buf_ptr; +} + +/** + * Skip the given number of bytes. + * struct put_bits_context must be flushed & aligned to a byte boundary before calling this. + */ +static inline void skip_put_bytes(struct put_bits_context *s, int n) +{ + s->buf_ptr += n; +} + +/** + * Skip the given number of bits. + * Must only be used if the actual values in the bitstream do not matter. + * If n is 0 the behavior is undefined. + */ +static inline void skip_put_bits(struct put_bits_context *s, int n) +{ + s->bit_left -= n; + s->buf_ptr -= 4 * (s->bit_left >> 5); + s->bit_left &= 31; +} + +/** + * Change the end of the buffer. + * + * @param size the new size in bytes of the buffer where to put bits + */ +static inline void set_put_bits_buffer_size(struct put_bits_context *s, int size) +{ + s->buf_end = s->buf + size; + s->size_in_bits = 8*size; +} + +#endif /* AVCODEC_PUT_BITS_H */ + |