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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 <assert.h>
#include "common/rawenc.h"
#include "common/y4menc.h"
// Returns the Y4M name associated with the monochrome colorspace.
static const char *monochrome_colorspace(unsigned int bit_depth) {
switch (bit_depth) {
case 8: return "Cmono";
case 9: return "Cmono9";
case 10: return "Cmono10";
case 12: return "Cmono12";
case 16: return "Cmono16";
default: assert(0); return NULL;
}
}
// Return the Y4M name of the 8-bit colorspace, given the chroma position and
// image format.
static const char *colorspace8(aom_chroma_sample_position_t csp,
aom_img_fmt_t fmt) {
switch (fmt) {
case AOM_IMG_FMT_I444: return "C444";
case AOM_IMG_FMT_I422: return "C422";
default:
if (csp == AOM_CSP_VERTICAL) {
return "C420mpeg2 XYSCSS=420MPEG2";
} else if (csp == AOM_CSP_COLOCATED) {
// Note that Y4M does not have a dedicated header for colocated chroma,
// and that FFMPEG interprets C420 as C420jpeg.
return "C420";
} else {
return "C420jpeg";
}
}
}
// Return the Y4M name of the colorspace, given the bit depth and image format.
static const char *colorspace(unsigned int bit_depth,
aom_chroma_sample_position_t csp,
aom_img_fmt_t fmt) {
switch (bit_depth) {
case 8: return colorspace8(csp, fmt);
case 9:
return fmt == AOM_IMG_FMT_I44416 ? "C444p9 XYSCSS=444P9"
: fmt == AOM_IMG_FMT_I42216 ? "C422p9 XYSCSS=422P9"
: "C420p9 XYSCSS=420P9";
case 10:
return fmt == AOM_IMG_FMT_I44416 ? "C444p10 XYSCSS=444P10"
: fmt == AOM_IMG_FMT_I42216 ? "C422p10 XYSCSS=422P10"
: "C420p10 XYSCSS=420P10";
case 12:
return fmt == AOM_IMG_FMT_I44416 ? "C444p12 XYSCSS=444P12"
: fmt == AOM_IMG_FMT_I42216 ? "C422p12 XYSCSS=422P12"
: "C420p12 XYSCSS=420P12";
case 14:
return fmt == AOM_IMG_FMT_I44416 ? "C444p14 XYSCSS=444P14"
: fmt == AOM_IMG_FMT_I42216 ? "C422p14 XYSCSS=422P14"
: "C420p14 XYSCSS=420P14";
case 16:
return fmt == AOM_IMG_FMT_I44416 ? "C444p16 XYSCSS=444P16"
: fmt == AOM_IMG_FMT_I42216 ? "C422p16 XYSCSS=422P16"
: "C420p16 XYSCSS=420P16";
default: assert(0); return NULL;
}
}
int y4m_write_file_header(char *buf, size_t len, int width, int height,
const struct AvxRational *framerate, int monochrome,
aom_chroma_sample_position_t csp, aom_img_fmt_t fmt,
unsigned int bit_depth, aom_color_range_t range) {
const char *color = monochrome ? monochrome_colorspace(bit_depth)
: colorspace(bit_depth, csp, fmt);
const char *color_range = ""; // Default assumption is studio range.
if (range == AOM_CR_FULL_RANGE) {
color_range = " XCOLORRANGE=FULL";
}
return snprintf(buf, len, "YUV4MPEG2 W%d H%d F%d:%d Ip %s%s\n", width, height,
framerate->numerator, framerate->denominator, color,
color_range);
}
int y4m_write_frame_header(char *buf, size_t len) {
return snprintf(buf, len, "FRAME\n");
}
void y4m_write_image_file(const aom_image_t *img, const int *planes,
FILE *file) {
int num_planes = img->monochrome ? 1 : 3;
raw_write_image_file(img, planes, num_planes, file);
}
void y4m_update_image_md5(const aom_image_t *img, const int *planes,
MD5Context *md5) {
int num_planes = img->monochrome ? 1 : 3;
raw_update_image_md5(img, planes, num_planes, md5);
}
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