108 lines
4.3 KiB
C
108 lines
4.3 KiB
C
/*
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* Copyright (c) 2016, Alliance for Open Media. All rights reserved.
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*
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* This source code is subject to the terms of the BSD 2 Clause License and
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* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
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* was not distributed with this source code in the LICENSE file, you can
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* obtain it at www.aomedia.org/license/software. If the Alliance for Open
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* Media Patent License 1.0 was not distributed with this source code in the
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* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
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*/
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#include <assert.h>
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#include "common/rawenc.h"
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#include "common/y4menc.h"
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// Returns the Y4M name associated with the monochrome colorspace.
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static const char *monochrome_colorspace(unsigned int bit_depth) {
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switch (bit_depth) {
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case 8: return "Cmono";
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case 9: return "Cmono9";
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case 10: return "Cmono10";
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case 12: return "Cmono12";
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case 16: return "Cmono16";
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default: assert(0); return NULL;
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}
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}
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// Return the Y4M name of the 8-bit colorspace, given the chroma position and
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// image format.
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static const char *colorspace8(aom_chroma_sample_position_t csp,
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aom_img_fmt_t fmt) {
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switch (fmt) {
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case AOM_IMG_FMT_I444: return "C444";
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case AOM_IMG_FMT_I422: return "C422";
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default:
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if (csp == AOM_CSP_VERTICAL) {
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return "C420mpeg2 XYSCSS=420MPEG2";
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} else if (csp == AOM_CSP_COLOCATED) {
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// Note that Y4M does not have a dedicated header for colocated chroma,
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// and that FFMPEG interprets C420 as C420jpeg.
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return "C420";
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} else {
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return "C420jpeg";
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}
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}
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}
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// Return the Y4M name of the colorspace, given the bit depth and image format.
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static const char *colorspace(unsigned int bit_depth,
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aom_chroma_sample_position_t csp,
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aom_img_fmt_t fmt) {
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switch (bit_depth) {
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case 8: return colorspace8(csp, fmt);
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case 9:
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return fmt == AOM_IMG_FMT_I44416 ? "C444p9 XYSCSS=444P9"
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: fmt == AOM_IMG_FMT_I42216 ? "C422p9 XYSCSS=422P9"
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: "C420p9 XYSCSS=420P9";
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case 10:
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return fmt == AOM_IMG_FMT_I44416 ? "C444p10 XYSCSS=444P10"
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: fmt == AOM_IMG_FMT_I42216 ? "C422p10 XYSCSS=422P10"
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: "C420p10 XYSCSS=420P10";
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case 12:
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return fmt == AOM_IMG_FMT_I44416 ? "C444p12 XYSCSS=444P12"
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: fmt == AOM_IMG_FMT_I42216 ? "C422p12 XYSCSS=422P12"
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: "C420p12 XYSCSS=420P12";
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case 14:
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return fmt == AOM_IMG_FMT_I44416 ? "C444p14 XYSCSS=444P14"
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: fmt == AOM_IMG_FMT_I42216 ? "C422p14 XYSCSS=422P14"
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: "C420p14 XYSCSS=420P14";
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case 16:
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return fmt == AOM_IMG_FMT_I44416 ? "C444p16 XYSCSS=444P16"
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: fmt == AOM_IMG_FMT_I42216 ? "C422p16 XYSCSS=422P16"
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: "C420p16 XYSCSS=420P16";
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default: assert(0); return NULL;
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}
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}
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int y4m_write_file_header(char *buf, size_t len, int width, int height,
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const struct AvxRational *framerate, int monochrome,
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aom_chroma_sample_position_t csp, aom_img_fmt_t fmt,
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unsigned int bit_depth, aom_color_range_t range) {
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const char *color = monochrome ? monochrome_colorspace(bit_depth)
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: colorspace(bit_depth, csp, fmt);
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const char *color_range = ""; // Default assumption is studio range.
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if (range == AOM_CR_FULL_RANGE) {
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color_range = " XCOLORRANGE=FULL";
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}
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return snprintf(buf, len, "YUV4MPEG2 W%d H%d F%d:%d Ip %s%s\n", width, height,
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framerate->numerator, framerate->denominator, color,
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color_range);
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}
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int y4m_write_frame_header(char *buf, size_t len) {
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return snprintf(buf, len, "FRAME\n");
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}
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void y4m_write_image_file(const aom_image_t *img, const int *planes,
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FILE *file) {
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int num_planes = img->monochrome ? 1 : 3;
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raw_write_image_file(img, planes, num_planes, file);
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}
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void y4m_update_image_md5(const aom_image_t *img, const int *planes,
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MD5Context *md5) {
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int num_planes = img->monochrome ? 1 : 3;
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raw_update_image_md5(img, planes, num_planes, md5);
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}
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