dirac.h 3.9 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131
  1. /*
  2. * Copyright (C) 2007 Marco Gerards <marco@gnu.org>
  3. * Copyright (C) 2009 David Conrad
  4. * Copyright (C) 2011 Jordi Ortiz
  5. *
  6. * This file is part of FFmpeg.
  7. *
  8. * FFmpeg is free software; you can redistribute it and/or
  9. * modify it under the terms of the GNU Lesser General Public
  10. * License as published by the Free Software Foundation; either
  11. * version 2.1 of the License, or (at your option) any later version.
  12. *
  13. * FFmpeg is distributed in the hope that it will be useful,
  14. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16. * Lesser General Public License for more details.
  17. *
  18. * You should have received a copy of the GNU Lesser General Public
  19. * License along with FFmpeg; if not, write to the Free Software
  20. * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21. */
  22. #ifndef AVCODEC_DIRAC_H
  23. #define AVCODEC_DIRAC_H
  24. /**
  25. * @file
  26. * Interface to Dirac Decoder/Encoder
  27. * @author Marco Gerards <marco@gnu.org>
  28. * @author David Conrad
  29. * @author Jordi Ortiz
  30. */
  31. #include "avcodec.h"
  32. /**
  33. * The spec limits the number of wavelet decompositions to 4 for both
  34. * level 1 (VC-2) and 128 (long-gop default).
  35. * 5 decompositions is the maximum before >16-bit buffers are needed.
  36. * Schroedinger allows this for DD 9,7 and 13,7 wavelets only, limiting
  37. * the others to 4 decompositions (or 3 for the fidelity filter).
  38. *
  39. * We use this instead of MAX_DECOMPOSITIONS to save some memory.
  40. */
  41. #define MAX_DWT_LEVELS 5
  42. /**
  43. * Parse code values:
  44. *
  45. * Dirac Specification ->
  46. * 9.6.1 Table 9.1
  47. *
  48. * VC-2 Specification ->
  49. * 10.4.1 Table 10.1
  50. */
  51. enum DiracParseCodes {
  52. DIRAC_PCODE_SEQ_HEADER = 0x00,
  53. DIRAC_PCODE_END_SEQ = 0x10,
  54. DIRAC_PCODE_AUX = 0x20,
  55. DIRAC_PCODE_PAD = 0x30,
  56. DIRAC_PCODE_PICTURE_CODED = 0x08,
  57. DIRAC_PCODE_PICTURE_RAW = 0x48,
  58. DIRAC_PCODE_PICTURE_LOW_DEL = 0xC8,
  59. DIRAC_PCODE_PICTURE_HQ = 0xE8,
  60. DIRAC_PCODE_INTER_NOREF_CO1 = 0x0A,
  61. DIRAC_PCODE_INTER_NOREF_CO2 = 0x09,
  62. DIRAC_PCODE_INTER_REF_CO1 = 0x0D,
  63. DIRAC_PCODE_INTER_REF_CO2 = 0x0E,
  64. DIRAC_PCODE_INTRA_REF_CO = 0x0C,
  65. DIRAC_PCODE_INTRA_REF_RAW = 0x4C,
  66. DIRAC_PCODE_INTRA_REF_PICT = 0xCC,
  67. DIRAC_PCODE_MAGIC = 0x42424344,
  68. };
  69. typedef struct DiracVersionInfo {
  70. int major;
  71. int minor;
  72. } DiracVersionInfo;
  73. typedef struct AVDiracSeqHeader {
  74. unsigned width;
  75. unsigned height;
  76. uint8_t chroma_format; ///< 0: 444 1: 422 2: 420
  77. uint8_t interlaced;
  78. uint8_t top_field_first;
  79. uint8_t frame_rate_index; ///< index into dirac_frame_rate[]
  80. uint8_t aspect_ratio_index; ///< index into dirac_aspect_ratio[]
  81. uint16_t clean_width;
  82. uint16_t clean_height;
  83. uint16_t clean_left_offset;
  84. uint16_t clean_right_offset;
  85. uint8_t pixel_range_index; ///< index into dirac_pixel_range_presets[]
  86. uint8_t color_spec_index; ///< index into dirac_color_spec_presets[]
  87. int profile;
  88. int level;
  89. AVRational framerate;
  90. AVRational sample_aspect_ratio;
  91. enum AVPixelFormat pix_fmt;
  92. enum AVColorRange color_range;
  93. enum AVColorPrimaries color_primaries;
  94. enum AVColorTransferCharacteristic color_trc;
  95. enum AVColorSpace colorspace;
  96. DiracVersionInfo version;
  97. int bit_depth;
  98. } AVDiracSeqHeader;
  99. /**
  100. * Parse a Dirac sequence header.
  101. *
  102. * @param dsh this function will allocate and fill an AVDiracSeqHeader struct
  103. * and write it into this pointer. The caller must free it with
  104. * av_free().
  105. * @param buf the data buffer
  106. * @param buf_size the size of the data buffer in bytes
  107. * @param log_ctx if non-NULL, this function will log errors here
  108. * @return 0 on success, a negative AVERROR code on failure
  109. */
  110. int av_dirac_parse_sequence_header(AVDiracSeqHeader **dsh,
  111. const uint8_t *buf, size_t buf_size,
  112. void *log_ctx);
  113. #endif /* AVCODEC_DIRAC_H */