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/*
* Copyright (c) 2016, Alliance for Open Media. All rights reserved
*
* This source code is subject to the terms of the BSD 2 Clause License and
* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
* was not distributed with this source code in the LICENSE file, you can
* obtain it at www.aomedia.org/license/software. If the Alliance for Open
* Media Patent License 1.0 was not distributed with this source code in the
* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
*/
#include "common/ivfdec.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "aom_ports/mem_ops.h"
#include "aom_ports/sanitizer.h"
#include "tools_common.h"
static const char *IVF_SIGNATURE = "DKIF";
static void fix_framerate(int *num, int *den) {
if (*den <= 0 || *den >= 1000000000 || *num <= 0 || *num >= 1000) {
// framerate seems to be invalid, just default to 30fps.
*num = 30;
*den = 1;
}
}
int file_is_ivf(struct AvxInputContext *input_ctx) {
unsigned char raw_hdr[32];
int is_ivf = 0;
if (buffer_input(input_ctx, 32, raw_hdr, /*buffered=*/true) == 32) {
if (memcmp(IVF_SIGNATURE, raw_hdr, 4) == 0) {
is_ivf = 1;
if (mem_get_le16(raw_hdr + 4) != 0) {
fprintf(stderr,
"Error: Unrecognized IVF version! This file may not"
" decode properly.\n");
}
input_ctx->fourcc = mem_get_le32(raw_hdr + 8);
input_ctx->width = mem_get_le16(raw_hdr + 12);
input_ctx->height = mem_get_le16(raw_hdr + 14);
input_ctx->framerate.numerator = mem_get_le32(raw_hdr + 16);
input_ctx->framerate.denominator = mem_get_le32(raw_hdr + 20);
fix_framerate(&input_ctx->framerate.numerator,
&input_ctx->framerate.denominator);
}
}
if (!is_ivf) {
rewind_detect(input_ctx);
}
return is_ivf;
}
int ivf_read_frame(struct AvxInputContext *input_ctx, uint8_t **buffer,
size_t *bytes_read, size_t *buffer_size,
aom_codec_pts_t *pts) {
unsigned char raw_header[IVF_FRAME_HDR_SZ] = { 0 };
size_t frame_size = 0;
if (read_from_input(input_ctx, IVF_FRAME_HDR_SZ, raw_header) !=
IVF_FRAME_HDR_SZ) {
if (!input_eof(input_ctx))
fprintf(stderr, "Warning: Failed to read frame size\n");
} else {
frame_size = mem_get_le32(raw_header);
if (frame_size > 256 * 1024 * 1024) {
fprintf(stderr, "Warning: Read invalid frame size (%u)\n",
(unsigned int)frame_size);
frame_size = 0;
}
if (frame_size > *buffer_size) {
uint8_t *new_buffer = (uint8_t *)realloc(*buffer, 2 * frame_size);
if (new_buffer) {
*buffer = new_buffer;
*buffer_size = 2 * frame_size;
} else {
fprintf(stderr, "Warning: Failed to allocate compressed data buffer\n");
frame_size = 0;
}
}
if (pts) {
*pts = mem_get_le32(&raw_header[4]);
*pts += ((aom_codec_pts_t)mem_get_le32(&raw_header[8]) << 32);
}
}
if (!input_eof(input_ctx)) {
ASAN_UNPOISON_MEMORY_REGION(*buffer, *buffer_size);
if (read_from_input(input_ctx, frame_size, *buffer) != frame_size) {
fprintf(stderr, "Warning: Failed to read full frame\n");
return 1;
}
ASAN_POISON_MEMORY_REGION(*buffer + frame_size, *buffer_size - frame_size);
*bytes_read = frame_size;
return 0;
}
return 1;
}
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