You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

143 lines
6.3KB

  1. /*
  2. * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
  3. *
  4. * This file is part of FFmpeg.
  5. *
  6. * FFmpeg is free software; you can redistribute it and/or
  7. * modify it under the terms of the GNU Lesser General Public
  8. * License as published by the Free Software Foundation; either
  9. * version 2.1 of the License, or (at your option) any later version.
  10. *
  11. * FFmpeg is distributed in the hope that it will be useful,
  12. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14. * Lesser General Public License for more details.
  15. *
  16. * You should have received a copy of the GNU Lesser General Public
  17. * License along with FFmpeg; if not, write to the Free Software
  18. * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19. */
  20. #include "avformat.h"
  21. #include "libavutil/opt.h"
  22. /**
  23. * @file
  24. * Options definition for AVFormatContext.
  25. */
  26. static const char* format_to_name(void* ptr)
  27. {
  28. AVFormatContext* fc = (AVFormatContext*) ptr;
  29. if(fc->iformat) return fc->iformat->name;
  30. else if(fc->oformat) return fc->oformat->name;
  31. else return "NULL";
  32. }
  33. static void *format_child_next(void *obj, void *prev)
  34. {
  35. AVFormatContext *s = obj;
  36. if (!prev && s->priv_data &&
  37. ((s->iformat && s->iformat->priv_class) ||
  38. s->oformat && s->oformat->priv_class))
  39. return s->priv_data;
  40. return NULL;
  41. }
  42. static const AVClass *format_child_class_next(const AVClass *prev)
  43. {
  44. AVInputFormat *ifmt = NULL;
  45. AVOutputFormat *ofmt = NULL;
  46. while (prev && (ifmt = av_iformat_next(ifmt)))
  47. if (ifmt->priv_class == prev)
  48. break;
  49. if ((prev && ifmt) || (!prev))
  50. while (ifmt = av_iformat_next(ifmt))
  51. if (ifmt->priv_class)
  52. return ifmt->priv_class;
  53. while (prev && (ofmt = av_oformat_next(ofmt)))
  54. if (ofmt->priv_class == prev)
  55. break;
  56. while (ofmt = av_oformat_next(ofmt))
  57. if (ofmt->priv_class)
  58. return ofmt->priv_class;
  59. return NULL;
  60. }
  61. #define OFFSET(x) offsetof(AVFormatContext,x)
  62. #define DEFAULT 0 //should be NAN but it does not work as it is not a constant in glibc as required by ANSI/ISO C
  63. //these names are too long to be readable
  64. #define E AV_OPT_FLAG_ENCODING_PARAM
  65. #define D AV_OPT_FLAG_DECODING_PARAM
  66. static const AVOption options[]={
  67. {"probesize", "set probing size", OFFSET(probesize), AV_OPT_TYPE_INT, {.dbl = 5000000 }, 32, INT_MAX, D},
  68. #if FF_API_MUXRATE
  69. {"muxrate", "set mux rate", OFFSET(mux_rate), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, 0, INT_MAX, E},
  70. #endif
  71. {"packetsize", "set packet size", OFFSET(packet_size), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, 0, INT_MAX, E},
  72. {"fflags", NULL, OFFSET(flags), AV_OPT_TYPE_FLAGS, {.dbl = DEFAULT }, INT_MIN, INT_MAX, D|E, "fflags"},
  73. {"ignidx", "ignore index", 0, AV_OPT_TYPE_CONST, {.dbl = AVFMT_FLAG_IGNIDX }, INT_MIN, INT_MAX, D, "fflags"},
  74. {"genpts", "generate pts", 0, AV_OPT_TYPE_CONST, {.dbl = AVFMT_FLAG_GENPTS }, INT_MIN, INT_MAX, D, "fflags"},
  75. {"nofillin", "do not fill in missing values that can be exactly calculated", 0, AV_OPT_TYPE_CONST, {.dbl = AVFMT_FLAG_NOFILLIN }, INT_MIN, INT_MAX, D, "fflags"},
  76. {"noparse", "disable AVParsers, this needs nofillin too", 0, AV_OPT_TYPE_CONST, {.dbl = AVFMT_FLAG_NOPARSE }, INT_MIN, INT_MAX, D, "fflags"},
  77. {"igndts", "ignore dts", 0, AV_OPT_TYPE_CONST, {.dbl = AVFMT_FLAG_IGNDTS }, INT_MIN, INT_MAX, D, "fflags"},
  78. #if FF_API_FLAG_RTP_HINT
  79. {"rtphint", "add rtp hinting (deprecated, use the -movflags rtphint option instead)", 0, AV_OPT_TYPE_CONST, {.dbl = AVFMT_FLAG_RTP_HINT }, INT_MIN, INT_MAX, E, "fflags"},
  80. #endif
  81. {"discardcorrupt", "discard corrupted frames", 0, AV_OPT_TYPE_CONST, {.dbl = AVFMT_FLAG_DISCARD_CORRUPT }, INT_MIN, INT_MAX, D, "fflags"},
  82. {"sortdts", "try to interleave outputted packets by dts", 0, AV_OPT_TYPE_CONST, {.dbl = AVFMT_FLAG_SORT_DTS }, INT_MIN, INT_MAX, D, "fflags"},
  83. {"keepside", "dont merge side data", 0, AV_OPT_TYPE_CONST, {.dbl = AVFMT_FLAG_KEEP_SIDE_DATA }, INT_MIN, INT_MAX, D, "fflags"},
  84. {"latm", "enable RTP MP4A-LATM payload", 0, AV_OPT_TYPE_CONST, {.dbl = AVFMT_FLAG_MP4A_LATM }, INT_MIN, INT_MAX, E, "fflags"},
  85. {"analyzeduration", "how many microseconds are analyzed to estimate duration", OFFSET(max_analyze_duration), AV_OPT_TYPE_INT, {.dbl = 5*AV_TIME_BASE }, 0, INT_MAX, D},
  86. {"cryptokey", "decryption key", OFFSET(key), AV_OPT_TYPE_BINARY, {.dbl = 0}, 0, 0, D},
  87. {"indexmem", "max memory used for timestamp index (per stream)", OFFSET(max_index_size), AV_OPT_TYPE_INT, {.dbl = 1<<20 }, 0, INT_MAX, D},
  88. {"rtbufsize", "max memory used for buffering real-time frames", OFFSET(max_picture_buffer), AV_OPT_TYPE_INT, {.dbl = 3041280 }, 0, INT_MAX, D}, /* defaults to 1s of 15fps 352x288 YUYV422 video */
  89. {"fdebug", "print specific debug info", OFFSET(debug), AV_OPT_TYPE_FLAGS, {.dbl = DEFAULT }, 0, INT_MAX, E|D, "fdebug"},
  90. {"ts", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_FDEBUG_TS }, INT_MIN, INT_MAX, E|D, "fdebug"},
  91. {"max_delay", "maximum muxing or demuxing delay in microseconds", OFFSET(max_delay), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, 0, INT_MAX, E|D},
  92. {"fer", "set error detection aggressivity", OFFSET(error_recognition), AV_OPT_TYPE_INT, {.dbl = FF_ER_CAREFUL }, INT_MIN, INT_MAX, D, "fer"},
  93. {"careful", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_ER_CAREFUL }, INT_MIN, INT_MAX, D, "fer"},
  94. {"explode", "abort decoding on error recognition", 0, AV_OPT_TYPE_CONST, {.dbl = FF_ER_EXPLODE }, INT_MIN, INT_MAX, D, "fer"},
  95. {"fpsprobesize", "number of frames used to probe fps", OFFSET(fps_probe_size), AV_OPT_TYPE_INT, {.dbl = -1}, -1, INT_MAX-1, D},
  96. {NULL},
  97. };
  98. #undef E
  99. #undef D
  100. #undef DEFAULT
  101. static const AVClass av_format_context_class = {
  102. .class_name = "AVFormatContext",
  103. .item_name = format_to_name,
  104. .option = options,
  105. .version = LIBAVUTIL_VERSION_INT,
  106. .child_next = format_child_next,
  107. .child_class_next = format_child_class_next,
  108. };
  109. static void avformat_get_context_defaults(AVFormatContext *s)
  110. {
  111. memset(s, 0, sizeof(AVFormatContext));
  112. s->av_class = &av_format_context_class;
  113. av_opt_set_defaults(s);
  114. }
  115. AVFormatContext *avformat_alloc_context(void)
  116. {
  117. AVFormatContext *ic;
  118. ic = av_malloc(sizeof(AVFormatContext));
  119. if (!ic) return ic;
  120. avformat_get_context_defaults(ic);
  121. return ic;
  122. }
  123. const AVClass *avformat_get_class(void)
  124. {
  125. return &av_format_context_class;
  126. }