ref: a1fdfbb174487e5efb76e6e77119d2e50840086e
dir: /vpx_dsp/bitwriter.c/
/*
* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include <assert.h>
#include "./bitwriter.h"
#if CONFIG_BITSTREAM_DEBUG
#include "vpx_util/vpx_debug_util.h"
#endif
void vpx_start_encode(vpx_writer *br, uint8_t *source) {
br->lowvalue = 0;
br->range = 255;
br->count = -24;
br->buffer = source;
br->pos = 0;
vpx_write_bit(br, 0);
}
void vpx_stop_encode(vpx_writer *br) {
int i;
#if CONFIG_BITSTREAM_DEBUG
bitstream_queue_set_skip_write(1);
#endif
for (i = 0; i < 32; i++) vpx_write_bit(br, 0);
// Ensure there's no ambigous collision with any index marker bytes
if ((br->buffer[br->pos - 1] & 0xe0) == 0xc0) br->buffer[br->pos++] = 0;
#if CONFIG_BITSTREAM_DEBUG
bitstream_queue_set_skip_write(0);
#endif
}