ref: ed19362e7723dd24d1949dff3b8490c9e7da9b3c
dir: /vpxstats.c/
/* * Copyright (c) 2013 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 "./vpxstats.h" #include <math.h> #include <stdlib.h> #include <string.h> #include "./tools_common.h" int stats_open_file(stats_io_t *stats, const char *fpf, int pass) { int res; stats->pass = pass; if (pass == 0) { stats->file = fopen(fpf, "wb"); stats->buf.sz = 0; stats->buf.buf = NULL; res = (stats->file != NULL); } else { size_t nbytes; stats->file = fopen(fpf, "rb"); if (stats->file == NULL) fatal("First-pass stats file does not exist!"); if (fseek(stats->file, 0, SEEK_END)) fatal("First-pass stats file must be seekable!"); stats->buf.sz = stats->buf_alloc_sz = ftell(stats->file); rewind(stats->file); stats->buf.buf = malloc(stats->buf_alloc_sz); if (!stats->buf.buf) fatal("Failed to allocate first-pass stats buffer (%lu bytes)", (unsigned int)stats->buf_alloc_sz); nbytes = fread(stats->buf.buf, 1, stats->buf.sz, stats->file); res = (nbytes == stats->buf.sz); } return res; } int stats_open_mem(stats_io_t *stats, int pass) { int res; stats->pass = pass; if (!pass) { stats->buf.sz = 0; stats->buf_alloc_sz = 64 * 1024; stats->buf.buf = malloc(stats->buf_alloc_sz); } stats->buf_ptr = stats->buf.buf; res = (stats->buf.buf != NULL); return res; } void stats_close(stats_io_t *stats, int last_pass) { if (stats->file) { if (stats->pass == last_pass) { free(stats->buf.buf); } fclose(stats->file); stats->file = NULL; } else { if (stats->pass == last_pass) free(stats->buf.buf); } } void stats_write(stats_io_t *stats, const void *pkt, size_t len) { if (stats->file) { (void)fwrite(pkt, 1, len, stats->file); } else { if (stats->buf.sz + len > stats->buf_alloc_sz) { size_t new_sz = stats->buf_alloc_sz + 64 * 1024; char *new_ptr = realloc(stats->buf.buf, new_sz); if (new_ptr) { stats->buf_ptr = new_ptr + (stats->buf_ptr - (char *)stats->buf.buf); stats->buf.buf = new_ptr; stats->buf_alloc_sz = new_sz; } else { fatal("Failed to realloc firstpass stats buffer."); } } memcpy(stats->buf_ptr, pkt, len); stats->buf.sz += len; stats->buf_ptr += len; } } vpx_fixed_buf_t stats_get(stats_io_t *stats) { return stats->buf; }