123 строки
3.0 KiB
C
123 строки
3.0 KiB
C
/*
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* Copyright (c) 2013 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "./vpxstats.h"
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#include <math.h>
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#include <stdlib.h>
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#include <string.h>
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#include "./tools_common.h"
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int stats_open_file(stats_io_t *stats, const char *fpf, int pass) {
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int res;
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stats->pass = pass;
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if (pass == 0) {
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stats->file = fopen(fpf, "wb");
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stats->buf.sz = 0;
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stats->buf.buf = NULL;
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res = (stats->file != NULL);
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} else {
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#if USE_POSIX_MMAP
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struct stat stat_buf;
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int fd;
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fd = open(fpf, O_RDONLY);
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stats->file = fdopen(fd, "rb");
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fstat(fd, &stat_buf);
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stats->buf.sz = stat_buf.st_size;
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stats->buf.buf = mmap(NULL, stats->buf.sz, PROT_READ, MAP_PRIVATE, fd, 0);
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res = (stats->buf.buf != NULL);
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#else
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size_t nbytes;
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stats->file = fopen(fpf, "rb");
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if (fseek(stats->file, 0, SEEK_END))
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fatal("First-pass stats file must be seekable!");
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stats->buf.sz = stats->buf_alloc_sz = ftell(stats->file);
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rewind(stats->file);
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stats->buf.buf = malloc(stats->buf_alloc_sz);
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if (!stats->buf.buf)
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fatal("Failed to allocate first-pass stats buffer (%lu bytes)",
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(unsigned int)stats->buf_alloc_sz);
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nbytes = fread(stats->buf.buf, 1, stats->buf.sz, stats->file);
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res = (nbytes == stats->buf.sz);
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#endif /* USE_POSIX_MMAP */
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}
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return res;
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}
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int stats_open_mem(stats_io_t *stats, int pass) {
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int res;
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stats->pass = pass;
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if (!pass) {
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stats->buf.sz = 0;
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stats->buf_alloc_sz = 64 * 1024;
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stats->buf.buf = malloc(stats->buf_alloc_sz);
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}
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stats->buf_ptr = stats->buf.buf;
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res = (stats->buf.buf != NULL);
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return res;
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}
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void stats_close(stats_io_t *stats, int last_pass) {
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if (stats->file) {
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if (stats->pass == last_pass) {
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#if USE_POSIX_MMAP
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munmap(stats->buf.buf, stats->buf.sz);
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#else
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free(stats->buf.buf);
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#endif /* USE_POSIX_MMAP */
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}
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fclose(stats->file);
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stats->file = NULL;
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} else {
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if (stats->pass == last_pass)
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free(stats->buf.buf);
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}
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}
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void stats_write(stats_io_t *stats, const void *pkt, size_t len) {
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if (stats->file) {
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(void) fwrite(pkt, 1, len, stats->file);
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} else {
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if (stats->buf.sz + len > stats->buf_alloc_sz) {
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size_t new_sz = stats->buf_alloc_sz + 64 * 1024;
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char *new_ptr = realloc(stats->buf.buf, new_sz);
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if (new_ptr) {
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stats->buf_ptr = new_ptr + (stats->buf_ptr - (char *)stats->buf.buf);
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stats->buf.buf = new_ptr;
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stats->buf_alloc_sz = new_sz;
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} else {
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fatal("Failed to realloc firstpass stats buffer.");
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}
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}
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memcpy(stats->buf_ptr, pkt, len);
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stats->buf.sz += len;
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stats->buf_ptr += len;
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}
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}
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vpx_fixed_buf_t stats_get(stats_io_t *stats) {
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return stats->buf;
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}
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