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update to libvpx b46243d from repo https://chromium.googlesource.com/webm/libvpx

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Mike Jerris committed 2016-09-26 14:31:51 -04:00
1 parent 2b1f0da5c4
commit 8c5f0301f3
1008 files changed
+110139 -201288
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libs/libvpx/vp8/decoder/dboolhuff.c
+45 -54
View File
@@ -8,70 +8,61 @@
* be found in the AUTHORS file in the root of the source tree.
*/
#include "dboolhuff.h"
#include "vp8/common/common.h"
#include "vpx_dsp/vpx_dsp_common.h"
int vp8dx_start_decode(BOOL_DECODER *br,
const unsigned char *source,
unsigned int source_sz,
vpx_decrypt_cb decrypt_cb,
void *decrypt_state)
{
br->user_buffer_end = source+source_sz;
br->user_buffer = source;
br->value = 0;
br->count = -8;
br->range = 255;
br->decrypt_cb = decrypt_cb;
br->decrypt_state = decrypt_state;
int vp8dx_start_decode(BOOL_DECODER *br, const unsigned char *source,
unsigned int source_sz, vpx_decrypt_cb decrypt_cb,
void *decrypt_state) {
br->user_buffer_end = source + source_sz;
br->user_buffer = source;
br->value = 0;
br->count = -8;
br->range = 255;
br->decrypt_cb = decrypt_cb;
br->decrypt_state = decrypt_state;
if (source_sz && !source)
return 1;
if (source_sz && !source) return 1;
/* Populate the buffer */
vp8dx_bool_decoder_fill(br);
/* Populate the buffer */
vp8dx_bool_decoder_fill(br);
return 0;
return 0;
}
void vp8dx_bool_decoder_fill(BOOL_DECODER *br)
{
const unsigned char *bufptr = br->user_buffer;
VP8_BD_VALUE value = br->value;
int count = br->count;
int shift = VP8_BD_VALUE_SIZE - CHAR_BIT - (count + CHAR_BIT);
size_t bytes_left = br->user_buffer_end - bufptr;
size_t bits_left = bytes_left * CHAR_BIT;
int x = (int)(shift + CHAR_BIT - bits_left);
int loop_end = 0;
unsigned char decrypted[sizeof(VP8_BD_VALUE) + 1];
void vp8dx_bool_decoder_fill(BOOL_DECODER *br) {
const unsigned char *bufptr = br->user_buffer;
VP8_BD_VALUE value = br->value;
int count = br->count;
int shift = VP8_BD_VALUE_SIZE - CHAR_BIT - (count + CHAR_BIT);
size_t bytes_left = br->user_buffer_end - bufptr;
size_t bits_left = bytes_left * CHAR_BIT;
int x = shift + CHAR_BIT - (int)bits_left;
int loop_end = 0;
unsigned char decrypted[sizeof(VP8_BD_VALUE) + 1];
if (br->decrypt_cb) {
size_t n = VPXMIN(sizeof(decrypted), bytes_left);
br->decrypt_cb(br->decrypt_state, bufptr, decrypted, (int)n);
bufptr = decrypted;
if (br->decrypt_cb) {
size_t n = VPXMIN(sizeof(decrypted), bytes_left);
br->decrypt_cb(br->decrypt_state, bufptr, decrypted, (int)n);
bufptr = decrypted;
}
if (x >= 0) {
count += VP8_LOTS_OF_BITS;
loop_end = x;
}
if (x < 0 || bits_left) {
while (shift >= loop_end) {
count += CHAR_BIT;
value |= (VP8_BD_VALUE)*bufptr << shift;
++bufptr;
++br->user_buffer;
shift -= CHAR_BIT;
}
}
if(x >= 0)
{
count += VP8_LOTS_OF_BITS;
loop_end = x;
}
if (x < 0 || bits_left)
{
while(shift >= loop_end)
{
count += CHAR_BIT;
value |= (VP8_BD_VALUE)*bufptr << shift;
++bufptr;
++br->user_buffer;
shift -= CHAR_BIT;
}
}
br->value = value;
br->count = count;
br->value = value;
br->count = count;
}