1b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian/* 2b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian * Copyright (c) 2013 The WebM project authors. All Rights Reserved. 3b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian * 4b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian * Use of this source code is governed by a BSD-style license 5b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian * that can be found in the LICENSE file in the root of the source 6b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian * tree. An additional intellectual property rights grant can be found 7b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian * in the file PATENTS. All contributing project authors may 8b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian * be found in the AUTHORS file in the root of the source tree. 9b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian */ 10b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian 11b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian#include <stdio.h> 12b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian#include <stdlib.h> 13b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian#include <string.h> 14b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian 15b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian#include "vpx_ports/mem_ops.h" 16b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian 17b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian#include "./ivfdec.h" 18b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian 19b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanianstatic const char *IVF_SIGNATURE = "DKIF"; 20b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian 21b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanianstatic void fix_framerate(int *num, int *den) { 22b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian // Some versions of vpxenc used 1/(2*fps) for the timebase, so 23b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian // we can guess the framerate using only the timebase in this 24b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian // case. Other files would require reading ahead to guess the 25b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian // timebase, like we do for webm. 26b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian if (*num < 1000) { 27b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian // Correct for the factor of 2 applied to the timebase in the encoder. 28b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian if (*num & 1) 29b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian *den *= 2; 30b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian else 31b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian *num /= 2; 32b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian } else { 33b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian // Don't know FPS for sure, and don't have readahead code 34b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian // (yet?), so just default to 30fps. 35b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian *num = 30; 36b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian *den = 1; 37b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian } 38b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian} 39b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian 40b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanianint file_is_ivf(struct VpxInputContext *input_ctx) { 41b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian char raw_hdr[32]; 42b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian int is_ivf = 0; 43b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian 44b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian if (fread(raw_hdr, 1, 32, input_ctx->file) == 32) { 45b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian if (memcmp(IVF_SIGNATURE, raw_hdr, 4) == 0) { 46b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian is_ivf = 1; 47b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian 48b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian if (mem_get_le16(raw_hdr + 4) != 0) { 49b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian fprintf(stderr, "Error: Unrecognized IVF version! This file may not" 50b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian " decode properly."); 51b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian } 52b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian 53b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian input_ctx->fourcc = mem_get_le32(raw_hdr + 8); 54b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian input_ctx->width = mem_get_le16(raw_hdr + 12); 55b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian input_ctx->height = mem_get_le16(raw_hdr + 14); 56b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian input_ctx->framerate.numerator = mem_get_le32(raw_hdr + 16); 57b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian input_ctx->framerate.denominator = mem_get_le32(raw_hdr + 20); 58b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian fix_framerate(&input_ctx->framerate.numerator, 59b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian &input_ctx->framerate.denominator); 60b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian } 61b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian } 62b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian 63b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian if (!is_ivf) { 64b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian rewind(input_ctx->file); 65b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian input_ctx->detect.buf_read = 0; 66b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian } else { 67b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian input_ctx->detect.position = 4; 68b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian } 69b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian return is_ivf; 70b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian} 71b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian 72b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanianint ivf_read_frame(FILE *infile, uint8_t **buffer, 73b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian size_t *bytes_read, size_t *buffer_size) { 74b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian char raw_header[IVF_FRAME_HDR_SZ] = {0}; 75b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian size_t frame_size = 0; 76b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian 77b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian if (fread(raw_header, IVF_FRAME_HDR_SZ, 1, infile) != 1) { 78b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian if (!feof(infile)) 79b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian warn("Failed to read frame size\n"); 80b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian } else { 81b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian frame_size = mem_get_le32(raw_header); 82b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian 83b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian if (frame_size > 256 * 1024 * 1024) { 84b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian warn("Read invalid frame size (%u)\n", (unsigned int)frame_size); 85b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian frame_size = 0; 86b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian } 87b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian 88b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian if (frame_size > *buffer_size) { 89b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian uint8_t *new_buffer = realloc(*buffer, 2 * frame_size); 90b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian 91b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian if (new_buffer) { 92b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian *buffer = new_buffer; 93b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian *buffer_size = 2 * frame_size; 94b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian } else { 95b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian warn("Failed to allocate compressed data buffer\n"); 96b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian frame_size = 0; 97b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian } 98b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian } 99b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian } 100b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian 101b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian if (!feof(infile)) { 102b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian if (fread(*buffer, 1, frame_size, infile) != frame_size) { 103b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian warn("Failed to read full frame\n"); 104b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian return 1; 105b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian } 106b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian 107b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian *bytes_read = frame_size; 108b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian return 0; 109b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian } 110b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian 111b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian return 1; 112b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian} 113