60 строки
2.2 KiB
C
60 строки
2.2 KiB
C
/*
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* Copyright (c) 2014 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include <assert.h>
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#include "./y4menc.h"
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int y4m_write_file_header(char *buf, size_t len, int width, int height,
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const struct VpxRational *framerate,
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vpx_img_fmt_t fmt, unsigned int bit_depth) {
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const char *color;
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switch (bit_depth) {
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case 8:
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color = fmt == VPX_IMG_FMT_444A ? "C444alpha\n" :
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fmt == VPX_IMG_FMT_I444 ? "C444\n" :
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fmt == VPX_IMG_FMT_I422 ? "C422\n" :
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"C420jpeg\n";
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break;
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case 9:
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color = fmt == VPX_IMG_FMT_I44416 ? "C444p9 XYSCSS=444P9\n" :
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fmt == VPX_IMG_FMT_I42216 ? "C422p9 XYSCSS=422P9\n" :
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"C420p9 XYSCSS=420P9\n";
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break;
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case 10:
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color = fmt == VPX_IMG_FMT_I44416 ? "C444p10 XYSCSS=444P10\n" :
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fmt == VPX_IMG_FMT_I42216 ? "C422p10 XYSCSS=422P10\n" :
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"C420p10 XYSCSS=420P10\n";
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break;
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case 12:
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color = fmt == VPX_IMG_FMT_I44416 ? "C444p12 XYSCSS=444P12\n" :
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fmt == VPX_IMG_FMT_I42216 ? "C422p12 XYSCSS=422P12\n" :
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"C420p12 XYSCSS=420P12\n";
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break;
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case 14:
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color = fmt == VPX_IMG_FMT_I44416 ? "C444p14 XYSCSS=444P14\n" :
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fmt == VPX_IMG_FMT_I42216 ? "C422p14 XYSCSS=422P14\n" :
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"C420p14 XYSCSS=420P14\n";
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break;
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case 16:
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color = fmt == VPX_IMG_FMT_I44416 ? "C444p16 XYSCSS=444P16\n" :
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fmt == VPX_IMG_FMT_I42216 ? "C422p16 XYSCSS=422P16\n" :
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"C420p16 XYSCSS=420P16\n";
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break;
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default:
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assert(0);
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}
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return snprintf(buf, len, "YUV4MPEG2 W%u H%u F%u:%u I%c %s", width, height,
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framerate->numerator, framerate->denominator, 'p', color);
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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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