diff options
Diffstat (limited to 'third_party/aom/common/y4menc.c')
| -rw-r--r-- | third_party/aom/common/y4menc.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/third_party/aom/common/y4menc.c b/third_party/aom/common/y4menc.c new file mode 100644 index 000000000..585d22197 --- /dev/null +++ b/third_party/aom/common/y4menc.c @@ -0,0 +1,103 @@ +/* + * 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. +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. +const char *colorspace8(aom_chroma_sample_position_t csp, aom_img_fmt_t fmt) { + switch (fmt) { + case AOM_IMG_FMT_444A: return "C444alpha"; + 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 { + return "C420jpeg"; + } + } +} + +// Return the Y4M name of the colorspace, given the bit depth and image format. +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) { + const char *color = monochrome ? monochrome_colorspace(bit_depth) + : colorspace(bit_depth, csp, fmt); + return snprintf(buf, len, "YUV4MPEG2 W%u H%u F%u:%u I%c %s\n", width, height, + framerate->numerator, framerate->denominator, 'p', color); +} + +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); +} |