The Tor Browser: content/media/raw/RawStructs.h@8bccb770b82d

     1 /* This Source Code Form is subject to the terms of the Mozilla Public

     2  * License, v. 2.0. If a copy of the MPL was not distributed with this

     3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     5 #if !defined(RawStructs_h_)

     6 #define RawStructs_h_

     8 static const uint32_t RAW_ID = 0x595556;

    10 struct nsRawVideo_PRUint24 {

    11   operator uint32_t() const { return value[2] << 16 | value[1] << 8 | value[0]; }

    12   nsRawVideo_PRUint24& operator= (const uint32_t& rhs)

    13   { value[2] = (rhs & 0x00FF0000) >> 16;

    14     value[1] = (rhs & 0x0000FF00) >> 8;

    15     value[0] = (rhs & 0x000000FF);

    16     return *this; }

    17 private:

    18   uint8_t value[3];

    19 };

    21 struct RawPacketHeader {

    22   typedef nsRawVideo_PRUint24 PRUint24;

    23   uint8_t packetID;

    24   PRUint24 codecID;

    25 };

    27 // This is Arc's draft from wiki.xiph.org/OggYUV

    28 struct RawVideoHeader {

    29   typedef nsRawVideo_PRUint24 PRUint24;

    30   uint8_t headerPacketID;          // Header Packet ID (always 0)

    31   PRUint24 codecID;                // Codec identifier (always "YUV")

    32   uint8_t majorVersion;            // Version Major (breaks backwards compat)

    33   uint8_t minorVersion;            // Version Minor (preserves backwards compat)

    34   uint16_t options;                // Bit 1: Color (false = B/W)

    35                                    // Bits 2-4: Chroma Pixel Shape

    36                                    // Bit 5: 50% horizontal offset for Cr samples

    37                                    // Bit 6: 50% vertical ...

    38                                    // Bits 7-8: Chroma Blending

    39                                    // Bit 9: Packed (false = Planar)

    40                                    // Bit 10: Cr Staggered Horizontally

    41                                    // Bit 11: Cr Staggered Vertically

    42                                    // Bit 12: Unused (format is always little endian)

    43                                    // Bit 13: Interlaced (false = Progressive)

    44                                    // Bits 14-16: Interlace options (undefined)

    46   uint8_t alphaChannelBpp;

    47   uint8_t lumaChannelBpp;

    48   uint8_t chromaChannelBpp;

    49   uint8_t colorspace;

    51   PRUint24 frameWidth;

    52   PRUint24 frameHeight;

    53   PRUint24 aspectNumerator;

    54   PRUint24 aspectDenominator;

    56   uint32_t framerateNumerator;

    57   uint32_t framerateDenominator;

    58 };

    60 #endif // RawStructs_h_

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