| /* |
| * 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" |
| |
| 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) { |
| char raw_hdr[32]; |
| int is_ivf = 0; |
| |
| if (fread(raw_hdr, 1, 32, input_ctx->file) == 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(input_ctx->file); |
| input_ctx->detect.buf_read = 0; |
| } else { |
| input_ctx->detect.position = 4; |
| } |
| return is_ivf; |
| } |
| |
| int ivf_read_frame(FILE *infile, uint8_t **buffer, size_t *bytes_read, |
| size_t *buffer_size, aom_codec_pts_t *pts) { |
| char raw_header[IVF_FRAME_HDR_SZ] = { 0 }; |
| size_t frame_size = 0; |
| |
| if (fread(raw_header, IVF_FRAME_HDR_SZ, 1, infile) != 1) { |
| if (!feof(infile)) 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 (!feof(infile)) { |
| ASAN_UNPOISON_MEMORY_REGION(*buffer, *buffer_size); |
| if (fread(*buffer, 1, frame_size, infile) != 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; |
| } |