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FFmpeg/libavcodec/options.c

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  1. /*

  2.  * Copyright (c) 2001 Fabrice Bellard

  3.  * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>

  4.  *

  5.  * This file is part of Libav.

  6.  *

  7.  * Libav is free software; you can redistribute it and/or

  8.  * modify it under the terms of the GNU Lesser General Public

  9.  * License as published by the Free Software Foundation; either

  10.  * version 2.1 of the License, or (at your option) any later version.

  11.  *

  12.  * Libav is distributed in the hope that it will be useful,

  13.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  14.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  15.  * Lesser General Public License for more details.

  16.  *

  17.  * You should have received a copy of the GNU Lesser General Public

  18.  * License along with Libav; if not, write to the Free Software

  19.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  20.  */

  21. 

  22. /**

  23.  * @file

  24.  * Options definition for AVCodecContext.

  25.  */

  26. 

  27. #include "avcodec.h"

  28. #include "internal.h"

  29. #include "libavutil/avassert.h"

  30. #include "libavutil/opt.h"

  31. #include <float.h>              /* FLT_MIN, FLT_MAX */

  32. 

  33. static const char* context_to_name(void* ptr) {

  34.     AVCodecContext *avc= ptr;

  35. 

  36.     if(avc && avc->codec && avc->codec->name)

  37.         return avc->codec->name;

  38.     else

  39.         return "NULL";

  40. }

  41. 

  42. static void *codec_child_next(void *obj, void *prev)

  43. {

  44.     AVCodecContext *s = obj;

  45.     if (!prev && s->codec && s->codec->priv_class && s->priv_data)

  46.         return s->priv_data;

  47.     return NULL;

  48. }

  49. 

  50. static const AVClass *codec_child_class_next(const AVClass *prev)

  51. {

  52.     AVCodec *c = NULL;

  53. 

  54.     /* find the codec that corresponds to prev */

  55.     while (prev && (c = av_codec_next(c)))

  56.         if (c->priv_class == prev)

  57.             break;

  58. 

  59.     /* find next codec with priv options */

  60.     while (c = av_codec_next(c))

  61.         if (c->priv_class)

  62.             return c->priv_class;

  63.     return NULL;

  64. }

  65. 

  66. #define OFFSET(x) offsetof(AVCodecContext,x)

  67. #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

  68. //these names are too long to be readable

  69. #define V AV_OPT_FLAG_VIDEO_PARAM

  70. #define A AV_OPT_FLAG_AUDIO_PARAM

  71. #define S AV_OPT_FLAG_SUBTITLE_PARAM

  72. #define E AV_OPT_FLAG_ENCODING_PARAM

  73. #define D AV_OPT_FLAG_DECODING_PARAM

  74. 

  75. #define AV_CODEC_DEFAULT_BITRATE 200*1000

  76. 

  77. static const AVOption options[]={

  78. {"b", "set bitrate (in bits/s)", OFFSET(bit_rate), AV_OPT_TYPE_INT, {.dbl = AV_CODEC_DEFAULT_BITRATE }, INT_MIN, INT_MAX, V|A|E},

  79. {"bt", "set video bitrate tolerance (in bits/s)", OFFSET(bit_rate_tolerance), AV_OPT_TYPE_INT, {.dbl = AV_CODEC_DEFAULT_BITRATE*20 }, 1, INT_MAX, V|E},

  80. {"flags", NULL, OFFSET(flags), AV_OPT_TYPE_FLAGS, {.dbl = DEFAULT }, 0, UINT_MAX, V|A|E|D, "flags"},

  81. {"mv4", "use four motion vector by macroblock (mpeg4)", 0, AV_OPT_TYPE_CONST, {.dbl = CODEC_FLAG_4MV }, INT_MIN, INT_MAX, V|E, "flags"},

  82. {"qpel", "use 1/4 pel motion compensation", 0, AV_OPT_TYPE_CONST, {.dbl = CODEC_FLAG_QPEL }, INT_MIN, INT_MAX, V|E, "flags"},

  83. {"loop", "use loop filter", 0, AV_OPT_TYPE_CONST, {.dbl = CODEC_FLAG_LOOP_FILTER }, INT_MIN, INT_MAX, V|E, "flags"},

  84. {"qscale", "use fixed qscale", 0, AV_OPT_TYPE_CONST, {.dbl = CODEC_FLAG_QSCALE }, INT_MIN, INT_MAX, 0, "flags"},

  85. {"gmc", "use gmc", 0, AV_OPT_TYPE_CONST, {.dbl = CODEC_FLAG_GMC }, INT_MIN, INT_MAX, V|E, "flags"},

  86. {"mv0", "always try a mb with mv=<0,0>", 0, AV_OPT_TYPE_CONST, {.dbl = CODEC_FLAG_MV0 }, INT_MIN, INT_MAX, V|E, "flags"},

  87. {"input_preserved", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = CODEC_FLAG_INPUT_PRESERVED }, INT_MIN, INT_MAX, 0, "flags"},

  88. {"pass1", "use internal 2pass ratecontrol in first  pass mode", 0, AV_OPT_TYPE_CONST, {.dbl = CODEC_FLAG_PASS1 }, INT_MIN, INT_MAX, 0, "flags"},

  89. {"pass2", "use internal 2pass ratecontrol in second pass mode", 0, AV_OPT_TYPE_CONST, {.dbl = CODEC_FLAG_PASS2 }, INT_MIN, INT_MAX, 0, "flags"},

  90. {"gray", "only decode/encode grayscale", 0, AV_OPT_TYPE_CONST, {.dbl = CODEC_FLAG_GRAY }, INT_MIN, INT_MAX, V|E|D, "flags"},

  91. {"emu_edge", "don't draw edges", 0, AV_OPT_TYPE_CONST, {.dbl = CODEC_FLAG_EMU_EDGE }, INT_MIN, INT_MAX, 0, "flags"},

  92. {"psnr", "error[?] variables will be set during encoding", 0, AV_OPT_TYPE_CONST, {.dbl = CODEC_FLAG_PSNR }, INT_MIN, INT_MAX, V|E, "flags"},

  93. {"truncated", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = CODEC_FLAG_TRUNCATED }, INT_MIN, INT_MAX, 0, "flags"},

  94. {"naq", "normalize adaptive quantization", 0, AV_OPT_TYPE_CONST, {.dbl = CODEC_FLAG_NORMALIZE_AQP }, INT_MIN, INT_MAX, V|E, "flags"},

  95. {"ildct", "use interlaced dct", 0, AV_OPT_TYPE_CONST, {.dbl = CODEC_FLAG_INTERLACED_DCT }, INT_MIN, INT_MAX, V|E, "flags"},

  96. {"low_delay", "force low delay", 0, AV_OPT_TYPE_CONST, {.dbl = CODEC_FLAG_LOW_DELAY }, INT_MIN, INT_MAX, V|D|E, "flags"},

  97. {"global_header", "place global headers in extradata instead of every keyframe", 0, AV_OPT_TYPE_CONST, {.dbl = CODEC_FLAG_GLOBAL_HEADER }, INT_MIN, INT_MAX, V|A|E, "flags"},

  98. {"bitexact", "use only bitexact stuff (except (i)dct)", 0, AV_OPT_TYPE_CONST, {.dbl = CODEC_FLAG_BITEXACT }, INT_MIN, INT_MAX, A|V|S|D|E, "flags"},

  99. {"aic", "h263 advanced intra coding / mpeg4 ac prediction", 0, AV_OPT_TYPE_CONST, {.dbl = CODEC_FLAG_AC_PRED }, INT_MIN, INT_MAX, V|E, "flags"},

  100. {"cbp", "use rate distortion optimization for cbp", 0, AV_OPT_TYPE_CONST, {.dbl = CODEC_FLAG_CBP_RD }, INT_MIN, INT_MAX, V|E, "flags"},

  101. {"qprd", "use rate distortion optimization for qp selection", 0, AV_OPT_TYPE_CONST, {.dbl = CODEC_FLAG_QP_RD }, INT_MIN, INT_MAX, V|E, "flags"},

  102. {"ilme", "interlaced motion estimation", 0, AV_OPT_TYPE_CONST, {.dbl = CODEC_FLAG_INTERLACED_ME }, INT_MIN, INT_MAX, V|E, "flags"},

  103. {"cgop", "closed gop", 0, AV_OPT_TYPE_CONST, {.dbl = CODEC_FLAG_CLOSED_GOP }, INT_MIN, INT_MAX, V|E, "flags"},

  104. {"fast", "allow non spec compliant speedup tricks", 0, AV_OPT_TYPE_CONST, {.dbl = CODEC_FLAG2_FAST }, INT_MIN, INT_MAX, V|E, "flags2"},

  105. {"sgop", "strictly enforce gop size", 0, AV_OPT_TYPE_CONST, {.dbl = CODEC_FLAG2_STRICT_GOP }, INT_MIN, INT_MAX, V|E, "flags2"},

  106. {"noout", "skip bitstream encoding", 0, AV_OPT_TYPE_CONST, {.dbl = CODEC_FLAG2_NO_OUTPUT }, INT_MIN, INT_MAX, V|E, "flags2"},

  107. {"local_header", "place global headers at every keyframe instead of in extradata", 0, AV_OPT_TYPE_CONST, {.dbl = CODEC_FLAG2_LOCAL_HEADER }, INT_MIN, INT_MAX, V|E, "flags2"},

  108. {"sub_id", NULL, OFFSET(sub_id), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX},

  109. {"me_method", "set motion estimation method", OFFSET(me_method), AV_OPT_TYPE_INT, {.dbl = ME_EPZS }, INT_MIN, INT_MAX, V|E, "me_method"},

  110. {"zero", "zero motion estimation (fastest)", 0, AV_OPT_TYPE_CONST, {.dbl = ME_ZERO }, INT_MIN, INT_MAX, V|E, "me_method" },

  111. {"full", "full motion estimation (slowest)", 0, AV_OPT_TYPE_CONST, {.dbl = ME_FULL }, INT_MIN, INT_MAX, V|E, "me_method" },

  112. {"epzs", "EPZS motion estimation (default)", 0, AV_OPT_TYPE_CONST, {.dbl = ME_EPZS }, INT_MIN, INT_MAX, V|E, "me_method" },

  113. {"esa", "esa motion estimation (alias for full)", 0, AV_OPT_TYPE_CONST, {.dbl = ME_FULL }, INT_MIN, INT_MAX, V|E, "me_method" },

  114. {"tesa", "tesa motion estimation", 0, AV_OPT_TYPE_CONST, {.dbl = ME_TESA }, INT_MIN, INT_MAX, V|E, "me_method" },

  115. {"dia", "dia motion estimation (alias for epzs)", 0, AV_OPT_TYPE_CONST, {.dbl = ME_EPZS }, INT_MIN, INT_MAX, V|E, "me_method" },

  116. {"log", "log motion estimation", 0, AV_OPT_TYPE_CONST, {.dbl = ME_LOG }, INT_MIN, INT_MAX, V|E, "me_method" },

  117. {"phods", "phods motion estimation", 0, AV_OPT_TYPE_CONST, {.dbl = ME_PHODS }, INT_MIN, INT_MAX, V|E, "me_method" },

  118. {"x1", "X1 motion estimation", 0, AV_OPT_TYPE_CONST, {.dbl = ME_X1 }, INT_MIN, INT_MAX, V|E, "me_method" },

  119. {"hex", "hex motion estimation", 0, AV_OPT_TYPE_CONST, {.dbl = ME_HEX }, INT_MIN, INT_MAX, V|E, "me_method" },

  120. {"umh", "umh motion estimation", 0, AV_OPT_TYPE_CONST, {.dbl = ME_UMH }, INT_MIN, INT_MAX, V|E, "me_method" },

  121. {"iter", "iter motion estimation", 0, AV_OPT_TYPE_CONST, {.dbl = ME_ITER }, INT_MIN, INT_MAX, V|E, "me_method" },

  122. {"extradata_size", NULL, OFFSET(extradata_size), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX},

  123. {"time_base", NULL, OFFSET(time_base), AV_OPT_TYPE_RATIONAL, {.dbl = 0}, INT_MIN, INT_MAX},

  124. {"g", "set the group of picture size", OFFSET(gop_size), AV_OPT_TYPE_INT, {.dbl = 12 }, INT_MIN, INT_MAX, V|E},

  125. {"ar", "set audio sampling rate (in Hz)", OFFSET(sample_rate), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, A|D|E},

  126. {"ac", "set number of audio channels", OFFSET(channels), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, A|D|E},

  127. {"cutoff", "set cutoff bandwidth", OFFSET(cutoff), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, A|E},

  128. {"frame_size", NULL, OFFSET(frame_size), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, A|E},

  129. {"frame_number", NULL, OFFSET(frame_number), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX},

  130. {"delay", NULL, OFFSET(delay), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX},

  131. {"qcomp", "video quantizer scale compression (VBR)", OFFSET(qcompress), AV_OPT_TYPE_FLOAT, {.dbl = 0.5 }, -FLT_MAX, FLT_MAX, V|E},

  132. {"qblur", "video quantizer scale blur (VBR)", OFFSET(qblur), AV_OPT_TYPE_FLOAT, {.dbl = 0.5 }, -1, FLT_MAX, V|E},

  133. {"qmin", "min video quantizer scale (VBR)", OFFSET(qmin), AV_OPT_TYPE_INT, {.dbl = 2 }, -1, 69, V|E},

  134. {"qmax", "max video quantizer scale (VBR)", OFFSET(qmax), AV_OPT_TYPE_INT, {.dbl = 31 }, -1, 69, V|E},

  135. {"qdiff", "max difference between the quantizer scale (VBR)", OFFSET(max_qdiff), AV_OPT_TYPE_INT, {.dbl = 3 }, INT_MIN, INT_MAX, V|E},

  136. {"bf", "use 'frames' B frames", OFFSET(max_b_frames), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, -1, FF_MAX_B_FRAMES, V|E},

  137. {"b_qfactor", "qp factor between p and b frames", OFFSET(b_quant_factor), AV_OPT_TYPE_FLOAT, {.dbl = 1.25 }, -FLT_MAX, FLT_MAX, V|E},

  138. {"rc_strategy", "ratecontrol method", OFFSET(rc_strategy), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E},

  139. {"b_strategy", "strategy to choose between I/P/B-frames", OFFSET(b_frame_strategy), AV_OPT_TYPE_INT, {.dbl = 0 }, INT_MIN, INT_MAX, V|E},

  140. {"ps", "rtp payload size in bytes", OFFSET(rtp_payload_size), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E},

  141. {"mv_bits", NULL, OFFSET(mv_bits), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX},

  142. {"header_bits", NULL, OFFSET(header_bits), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX},

  143. {"i_tex_bits", NULL, OFFSET(i_tex_bits), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX},

  144. {"p_tex_bits", NULL, OFFSET(p_tex_bits), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX},

  145. {"i_count", NULL, OFFSET(i_count), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX},

  146. {"p_count", NULL, OFFSET(p_count), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX},

  147. {"skip_count", NULL, OFFSET(skip_count), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX},

  148. {"misc_bits", NULL, OFFSET(misc_bits), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX},

  149. {"frame_bits", NULL, OFFSET(frame_bits), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX},

  150. {"codec_tag", NULL, OFFSET(codec_tag), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX},

  151. {"bug", "workaround not auto detected encoder bugs", OFFSET(workaround_bugs), AV_OPT_TYPE_FLAGS, {.dbl = FF_BUG_AUTODETECT }, INT_MIN, INT_MAX, V|D, "bug"},

  152. {"autodetect", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_BUG_AUTODETECT }, INT_MIN, INT_MAX, V|D, "bug"},

  153. {"old_msmpeg4", "some old lavc generated msmpeg4v3 files (no autodetection)", 0, AV_OPT_TYPE_CONST, {.dbl = FF_BUG_OLD_MSMPEG4 }, INT_MIN, INT_MAX, V|D, "bug"},

  154. {"xvid_ilace", "Xvid interlacing bug (autodetected if fourcc==XVIX)", 0, AV_OPT_TYPE_CONST, {.dbl = FF_BUG_XVID_ILACE }, INT_MIN, INT_MAX, V|D, "bug"},

  155. {"ump4", "(autodetected if fourcc==UMP4)", 0, AV_OPT_TYPE_CONST, {.dbl = FF_BUG_UMP4 }, INT_MIN, INT_MAX, V|D, "bug"},

  156. {"no_padding", "padding bug (autodetected)", 0, AV_OPT_TYPE_CONST, {.dbl = FF_BUG_NO_PADDING }, INT_MIN, INT_MAX, V|D, "bug"},

  157. {"amv", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_BUG_AMV }, INT_MIN, INT_MAX, V|D, "bug"},

  158. {"ac_vlc", "illegal vlc bug (autodetected per fourcc)", 0, AV_OPT_TYPE_CONST, {.dbl = FF_BUG_AC_VLC }, INT_MIN, INT_MAX, V|D, "bug"},

  159. {"qpel_chroma", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_BUG_QPEL_CHROMA }, INT_MIN, INT_MAX, V|D, "bug"},

  160. {"std_qpel", "old standard qpel (autodetected per fourcc/version)", 0, AV_OPT_TYPE_CONST, {.dbl = FF_BUG_STD_QPEL }, INT_MIN, INT_MAX, V|D, "bug"},

  161. {"qpel_chroma2", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_BUG_QPEL_CHROMA2 }, INT_MIN, INT_MAX, V|D, "bug"},

  162. {"direct_blocksize", "direct-qpel-blocksize bug (autodetected per fourcc/version)", 0, AV_OPT_TYPE_CONST, {.dbl = FF_BUG_DIRECT_BLOCKSIZE }, INT_MIN, INT_MAX, V|D, "bug"},

  163. {"edge", "edge padding bug (autodetected per fourcc/version)", 0, AV_OPT_TYPE_CONST, {.dbl = FF_BUG_EDGE }, INT_MIN, INT_MAX, V|D, "bug"},

  164. {"hpel_chroma", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_BUG_HPEL_CHROMA }, INT_MIN, INT_MAX, V|D, "bug"},

  165. {"dc_clip", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_BUG_DC_CLIP }, INT_MIN, INT_MAX, V|D, "bug"},

  166. {"ms", "workaround various bugs in microsofts broken decoders", 0, AV_OPT_TYPE_CONST, {.dbl = FF_BUG_MS }, INT_MIN, INT_MAX, V|D, "bug"},

  167. {"trunc", "trancated frames", 0, AV_OPT_TYPE_CONST, {.dbl = FF_BUG_TRUNCATED}, INT_MIN, INT_MAX, V|D, "bug"},

  168. {"lelim", "single coefficient elimination threshold for luminance (negative values also consider dc coefficient)", OFFSET(luma_elim_threshold), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E},

  169. {"celim", "single coefficient elimination threshold for chrominance (negative values also consider dc coefficient)", OFFSET(chroma_elim_threshold), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E},

  170. {"strict", "how strictly to follow the standards", OFFSET(strict_std_compliance), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, A|V|D|E, "strict"},

  171. {"very", "strictly conform to a older more strict version of the spec or reference software", 0, AV_OPT_TYPE_CONST, {.dbl = FF_COMPLIANCE_VERY_STRICT }, INT_MIN, INT_MAX, V|D|E, "strict"},

  172. {"strict", "strictly conform to all the things in the spec no matter what consequences", 0, AV_OPT_TYPE_CONST, {.dbl = FF_COMPLIANCE_STRICT }, INT_MIN, INT_MAX, V|D|E, "strict"},

  173. {"normal", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_COMPLIANCE_NORMAL }, INT_MIN, INT_MAX, V|D|E, "strict"},

  174. {"unofficial", "allow unofficial extensions", 0, AV_OPT_TYPE_CONST, {.dbl = FF_COMPLIANCE_UNOFFICIAL }, INT_MIN, INT_MAX, V|D|E, "strict"},

  175. {"experimental", "allow non standardized experimental things", 0, AV_OPT_TYPE_CONST, {.dbl = FF_COMPLIANCE_EXPERIMENTAL }, INT_MIN, INT_MAX, V|D|E, "strict"},

  176. {"b_qoffset", "qp offset between P and B frames", OFFSET(b_quant_offset), AV_OPT_TYPE_FLOAT, {.dbl = 1.25 }, -FLT_MAX, FLT_MAX, V|E},

  177. {"err_detect", "set error detection flags", OFFSET(err_recognition), AV_OPT_TYPE_FLAGS, {.dbl = AV_EF_CRCCHECK }, INT_MIN, INT_MAX, A|V|D, "err_detect"},

  178. {"crccheck", "verify embedded CRCs", 0, AV_OPT_TYPE_CONST, {.dbl = AV_EF_CRCCHECK }, INT_MIN, INT_MAX, V|D, "err_detect"},

  179. {"bitstream", "detect bitstream specification deviations", 0, AV_OPT_TYPE_CONST, {.dbl = AV_EF_BITSTREAM }, INT_MIN, INT_MAX, V|D, "err_detect"},

  180. {"buffer", "detect improper bitstream length", 0, AV_OPT_TYPE_CONST, {.dbl = AV_EF_BUFFER }, INT_MIN, INT_MAX, V|D, "err_detect"},

  181. {"explode", "abort decoding on minor error detection", 0, AV_OPT_TYPE_CONST, {.dbl = AV_EF_EXPLODE }, INT_MIN, INT_MAX, V|D, "err_detect"},

  182. {"has_b_frames", NULL, OFFSET(has_b_frames), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX},

  183. {"block_align", NULL, OFFSET(block_align), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX},

  184. {"mpeg_quant", "use MPEG quantizers instead of H.263", OFFSET(mpeg_quant), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E},

  185. {"stats_out", NULL, OFFSET(stats_out), AV_OPT_TYPE_STRING, {.str = NULL}, CHAR_MIN, CHAR_MAX},

  186. {"stats_in", NULL, OFFSET(stats_in), AV_OPT_TYPE_STRING, {.str = NULL}, CHAR_MIN, CHAR_MAX},

  187. {"qsquish", "how to keep quantizer between qmin and qmax (0 = clip, 1 = use differentiable function)", OFFSET(rc_qsquish), AV_OPT_TYPE_FLOAT, {.dbl = DEFAULT }, 0, 99, V|E},

  188. {"rc_qmod_amp", "experimental quantizer modulation", OFFSET(rc_qmod_amp), AV_OPT_TYPE_FLOAT, {.dbl = DEFAULT }, -FLT_MAX, FLT_MAX, V|E},

  189. {"rc_qmod_freq", "experimental quantizer modulation", OFFSET(rc_qmod_freq), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E},

  190. {"rc_override_count", NULL, OFFSET(rc_override_count), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX},

  191. {"rc_eq", "set rate control equation", OFFSET(rc_eq), AV_OPT_TYPE_STRING, {.str = NULL}, CHAR_MIN, CHAR_MAX, V|E},

  192. {"maxrate", "set max video bitrate tolerance (in bits/s)", OFFSET(rc_max_rate), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E},

  193. {"minrate", "set min video bitrate tolerance (in bits/s)", OFFSET(rc_min_rate), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E},

  194. {"bufsize", "set ratecontrol buffer size (in bits)", OFFSET(rc_buffer_size), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, A|V|E},

  195. {"rc_buf_aggressivity", "currently useless", OFFSET(rc_buffer_aggressivity), AV_OPT_TYPE_FLOAT, {.dbl = 1.0 }, -FLT_MAX, FLT_MAX, V|E},

  196. {"i_qfactor", "qp factor between P and I frames", OFFSET(i_quant_factor), AV_OPT_TYPE_FLOAT, {.dbl = -0.8 }, -FLT_MAX, FLT_MAX, V|E},

  197. {"i_qoffset", "qp offset between P and I frames", OFFSET(i_quant_offset), AV_OPT_TYPE_FLOAT, {.dbl = 0.0 }, -FLT_MAX, FLT_MAX, V|E},

  198. {"rc_init_cplx", "initial complexity for 1-pass encoding", OFFSET(rc_initial_cplx), AV_OPT_TYPE_FLOAT, {.dbl = DEFAULT }, -FLT_MAX, FLT_MAX, V|E},

  199. {"dct", "DCT algorithm", OFFSET(dct_algo), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, 0, INT_MAX, V|E, "dct"},

  200. {"auto", "autoselect a good one (default)", 0, AV_OPT_TYPE_CONST, {.dbl = FF_DCT_AUTO }, INT_MIN, INT_MAX, V|E, "dct"},

  201. {"fastint", "fast integer", 0, AV_OPT_TYPE_CONST, {.dbl = FF_DCT_FASTINT }, INT_MIN, INT_MAX, V|E, "dct"},

  202. {"int", "accurate integer", 0, AV_OPT_TYPE_CONST, {.dbl = FF_DCT_INT }, INT_MIN, INT_MAX, V|E, "dct"},

  203. {"mmx", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_DCT_MMX }, INT_MIN, INT_MAX, V|E, "dct"},

  204. {"altivec", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_DCT_ALTIVEC }, INT_MIN, INT_MAX, V|E, "dct"},

  205. {"faan", "floating point AAN DCT", 0, AV_OPT_TYPE_CONST, {.dbl = FF_DCT_FAAN }, INT_MIN, INT_MAX, V|E, "dct"},

  206. {"lumi_mask", "compresses bright areas stronger than medium ones", OFFSET(lumi_masking), AV_OPT_TYPE_FLOAT, {.dbl = 0 }, -FLT_MAX, FLT_MAX, V|E},

  207. {"tcplx_mask", "temporal complexity masking", OFFSET(temporal_cplx_masking), AV_OPT_TYPE_FLOAT, {.dbl = 0 }, -FLT_MAX, FLT_MAX, V|E},

  208. {"scplx_mask", "spatial complexity masking", OFFSET(spatial_cplx_masking), AV_OPT_TYPE_FLOAT, {.dbl = 0 }, -FLT_MAX, FLT_MAX, V|E},

  209. {"p_mask", "inter masking", OFFSET(p_masking), AV_OPT_TYPE_FLOAT, {.dbl = 0 }, -FLT_MAX, FLT_MAX, V|E},

  210. {"dark_mask", "compresses dark areas stronger than medium ones", OFFSET(dark_masking), AV_OPT_TYPE_FLOAT, {.dbl = 0 }, -FLT_MAX, FLT_MAX, V|E},

  211. {"idct", "select IDCT implementation", OFFSET(idct_algo), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, 0, INT_MAX, V|E|D, "idct"},

  212. {"auto", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_IDCT_AUTO }, INT_MIN, INT_MAX, V|E|D, "idct"},

  213. {"int", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_IDCT_INT }, INT_MIN, INT_MAX, V|E|D, "idct"},

  214. {"simple", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_IDCT_SIMPLE }, INT_MIN, INT_MAX, V|E|D, "idct"},

  215. {"simplemmx", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_IDCT_SIMPLEMMX }, INT_MIN, INT_MAX, V|E|D, "idct"},

  216. {"libmpeg2mmx", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_IDCT_LIBMPEG2MMX }, INT_MIN, INT_MAX, V|E|D, "idct"},

  217. {"mmi", NULL, 0, AV_OPT_TYPE_CONST, { .dbl = FF_IDCT_MMI }, INT_MIN, INT_MAX, V|E|D, "idct"},

  218. {"arm", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_IDCT_ARM }, INT_MIN, INT_MAX, V|E|D, "idct"},

  219. {"altivec", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_IDCT_ALTIVEC }, INT_MIN, INT_MAX, V|E|D, "idct"},

  220. {"sh4", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_IDCT_SH4 }, INT_MIN, INT_MAX, V|E|D, "idct"},

  221. {"simplearm", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_IDCT_SIMPLEARM }, INT_MIN, INT_MAX, V|E|D, "idct"},

  222. {"simplearmv5te", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_IDCT_SIMPLEARMV5TE }, INT_MIN, INT_MAX, V|E|D, "idct"},

  223. {"simplearmv6", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_IDCT_SIMPLEARMV6 }, INT_MIN, INT_MAX, V|E|D, "idct"},

  224. {"simpleneon", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_IDCT_SIMPLENEON }, INT_MIN, INT_MAX, V|E|D, "idct"},

  225. {"simplealpha", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_IDCT_SIMPLEALPHA }, INT_MIN, INT_MAX, V|E|D, "idct"},

  226. {"h264", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_IDCT_H264 }, INT_MIN, INT_MAX, V|E|D, "idct"},

  227. {"vp3", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_IDCT_VP3 }, INT_MIN, INT_MAX, V|E|D, "idct"},

  228. {"ipp", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_IDCT_IPP }, INT_MIN, INT_MAX, V|E|D, "idct"},

  229. {"xvidmmx", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_IDCT_XVIDMMX }, INT_MIN, INT_MAX, V|E|D, "idct"},

  230. {"faani", "floating point AAN IDCT", 0, AV_OPT_TYPE_CONST, {.dbl = FF_IDCT_FAAN }, INT_MIN, INT_MAX, V|D|E, "idct"},

  231. {"slice_count", NULL, OFFSET(slice_count), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX},

  232. {"ec", "set error concealment strategy", OFFSET(error_concealment), AV_OPT_TYPE_FLAGS, {.dbl = 3 }, INT_MIN, INT_MAX, V|D, "ec"},

  233. {"guess_mvs", "iterative motion vector (MV) search (slow)", 0, AV_OPT_TYPE_CONST, {.dbl = FF_EC_GUESS_MVS }, INT_MIN, INT_MAX, V|D, "ec"},

  234. {"deblock", "use strong deblock filter for damaged MBs", 0, AV_OPT_TYPE_CONST, {.dbl = FF_EC_DEBLOCK }, INT_MIN, INT_MAX, V|D, "ec"},

  235. {"bits_per_coded_sample", NULL, OFFSET(bits_per_coded_sample), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX},

  236. {"pred", "prediction method", OFFSET(prediction_method), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E, "pred"},

  237. {"left", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_PRED_LEFT }, INT_MIN, INT_MAX, V|E, "pred"},

  238. {"plane", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_PRED_PLANE }, INT_MIN, INT_MAX, V|E, "pred"},

  239. {"median", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_PRED_MEDIAN }, INT_MIN, INT_MAX, V|E, "pred"},

  240. {"aspect", "sample aspect ratio", OFFSET(sample_aspect_ratio), AV_OPT_TYPE_RATIONAL, {.dbl = 0}, 0, 10, V|E},

  241. {"debug", "print specific debug info", OFFSET(debug), AV_OPT_TYPE_FLAGS, {.dbl = DEFAULT }, 0, INT_MAX, V|A|S|E|D, "debug"},

  242. {"pict", "picture info", 0, AV_OPT_TYPE_CONST, {.dbl = FF_DEBUG_PICT_INFO }, INT_MIN, INT_MAX, V|D, "debug"},

  243. {"rc", "rate control", 0, AV_OPT_TYPE_CONST, {.dbl = FF_DEBUG_RC }, INT_MIN, INT_MAX, V|E, "debug"},

  244. {"bitstream", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_DEBUG_BITSTREAM }, INT_MIN, INT_MAX, V|D, "debug"},

  245. {"mb_type", "macroblock (MB) type", 0, AV_OPT_TYPE_CONST, {.dbl = FF_DEBUG_MB_TYPE }, INT_MIN, INT_MAX, V|D, "debug"},

  246. {"qp", "per-block quantization parameter (QP)", 0, AV_OPT_TYPE_CONST, {.dbl = FF_DEBUG_QP }, INT_MIN, INT_MAX, V|D, "debug"},

  247. {"mv", "motion vector", 0, AV_OPT_TYPE_CONST, {.dbl = FF_DEBUG_MV }, INT_MIN, INT_MAX, V|D, "debug"},

  248. {"dct_coeff", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_DEBUG_DCT_COEFF }, INT_MIN, INT_MAX, V|D, "debug"},

  249. {"skip", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_DEBUG_SKIP }, INT_MIN, INT_MAX, V|D, "debug"},

  250. {"startcode", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_DEBUG_STARTCODE }, INT_MIN, INT_MAX, V|D, "debug"},

  251. {"pts", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_DEBUG_PTS }, INT_MIN, INT_MAX, V|D, "debug"},

  252. {"er", "error recognition", 0, AV_OPT_TYPE_CONST, {.dbl = FF_DEBUG_ER }, INT_MIN, INT_MAX, V|D, "debug"},

  253. {"mmco", "memory management control operations (H.264)", 0, AV_OPT_TYPE_CONST, {.dbl = FF_DEBUG_MMCO }, INT_MIN, INT_MAX, V|D, "debug"},

  254. {"bugs", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_DEBUG_BUGS }, INT_MIN, INT_MAX, V|D, "debug"},

  255. {"vis_qp", "visualize quantization parameter (QP), lower QP are tinted greener", 0, AV_OPT_TYPE_CONST, {.dbl = FF_DEBUG_VIS_QP }, INT_MIN, INT_MAX, V|D, "debug"},

  256. {"vis_mb_type", "visualize block types", 0, AV_OPT_TYPE_CONST, {.dbl = FF_DEBUG_VIS_MB_TYPE }, INT_MIN, INT_MAX, V|D, "debug"},

  257. {"buffers", "picture buffer allocations", 0, AV_OPT_TYPE_CONST, {.dbl = FF_DEBUG_BUFFERS }, INT_MIN, INT_MAX, V|D, "debug"},

  258. {"thread_ops", "threading operations", 0, AV_OPT_TYPE_CONST, {.dbl = FF_DEBUG_THREADS }, INT_MIN, INT_MAX, V|D, "debug"},

  259. {"vismv", "visualize motion vectors (MVs)", OFFSET(debug_mv), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, 0, INT_MAX, V|D, "debug_mv"},

  260. {"pf", "forward predicted MVs of P-frames", 0, AV_OPT_TYPE_CONST, {.dbl = FF_DEBUG_VIS_MV_P_FOR }, INT_MIN, INT_MAX, V|D, "debug_mv"},

  261. {"bf", "forward predicted MVs of B-frames", 0, AV_OPT_TYPE_CONST, {.dbl = FF_DEBUG_VIS_MV_B_FOR }, INT_MIN, INT_MAX, V|D, "debug_mv"},

  262. {"bb", "backward predicted MVs of B-frames", 0, AV_OPT_TYPE_CONST, {.dbl = FF_DEBUG_VIS_MV_B_BACK }, INT_MIN, INT_MAX, V|D, "debug_mv"},

  263. {"cmp", "full pel me compare function", OFFSET(me_cmp), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E, "cmp_func"},

  264. {"subcmp", "sub pel me compare function", OFFSET(me_sub_cmp), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E, "cmp_func"},

  265. {"mbcmp", "macroblock compare function", OFFSET(mb_cmp), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E, "cmp_func"},

  266. {"ildctcmp", "interlaced dct compare function", OFFSET(ildct_cmp), AV_OPT_TYPE_INT, {.dbl = FF_CMP_VSAD }, INT_MIN, INT_MAX, V|E, "cmp_func"},

  267. {"dia_size", "diamond type & size for motion estimation", OFFSET(dia_size), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E},

  268. {"last_pred", "amount of motion predictors from the previous frame", OFFSET(last_predictor_count), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E},

  269. {"preme", "pre motion estimation", OFFSET(pre_me), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E},

  270. {"precmp", "pre motion estimation compare function", OFFSET(me_pre_cmp), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E, "cmp_func"},

  271. {"sad", "sum of absolute differences, fast (default)", 0, AV_OPT_TYPE_CONST, {.dbl = FF_CMP_SAD }, INT_MIN, INT_MAX, V|E, "cmp_func"},

  272. {"sse", "sum of squared errors", 0, AV_OPT_TYPE_CONST, {.dbl = FF_CMP_SSE }, INT_MIN, INT_MAX, V|E, "cmp_func"},

  273. {"satd", "sum of absolute Hadamard transformed differences", 0, AV_OPT_TYPE_CONST, {.dbl = FF_CMP_SATD }, INT_MIN, INT_MAX, V|E, "cmp_func"},

  274. {"dct", "sum of absolute DCT transformed differences", 0, AV_OPT_TYPE_CONST, {.dbl = FF_CMP_DCT }, INT_MIN, INT_MAX, V|E, "cmp_func"},

  275. {"psnr", "sum of squared quantization errors (avoid, low quality)", 0, AV_OPT_TYPE_CONST, {.dbl = FF_CMP_PSNR }, INT_MIN, INT_MAX, V|E, "cmp_func"},

  276. {"bit", "number of bits needed for the block", 0, AV_OPT_TYPE_CONST, {.dbl = FF_CMP_BIT }, INT_MIN, INT_MAX, V|E, "cmp_func"},

  277. {"rd", "rate distortion optimal, slow", 0, AV_OPT_TYPE_CONST, {.dbl = FF_CMP_RD }, INT_MIN, INT_MAX, V|E, "cmp_func"},

  278. {"zero", "0", 0, AV_OPT_TYPE_CONST, {.dbl = FF_CMP_ZERO }, INT_MIN, INT_MAX, V|E, "cmp_func"},

  279. {"vsad", "sum of absolute vertical differences", 0, AV_OPT_TYPE_CONST, {.dbl = FF_CMP_VSAD }, INT_MIN, INT_MAX, V|E, "cmp_func"},

  280. {"vsse", "sum of squared vertical differences", 0, AV_OPT_TYPE_CONST, {.dbl = FF_CMP_VSSE }, INT_MIN, INT_MAX, V|E, "cmp_func"},

  281. {"nsse", "noise preserving sum of squared differences", 0, AV_OPT_TYPE_CONST, {.dbl = FF_CMP_NSSE }, INT_MIN, INT_MAX, V|E, "cmp_func"},

  282. #if CONFIG_SNOW_ENCODER

  283. {"w53", "5/3 wavelet, only used in snow", 0, AV_OPT_TYPE_CONST, {.dbl = FF_CMP_W53 }, INT_MIN, INT_MAX, V|E, "cmp_func"},

  284. {"w97", "9/7 wavelet, only used in snow", 0, AV_OPT_TYPE_CONST, {.dbl = FF_CMP_W97 }, INT_MIN, INT_MAX, V|E, "cmp_func"},

  285. #endif

  286. {"dctmax", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_CMP_DCTMAX }, INT_MIN, INT_MAX, V|E, "cmp_func"},

  287. {"chroma", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_CMP_CHROMA }, INT_MIN, INT_MAX, V|E, "cmp_func"},

  288. {"pre_dia_size", "diamond type & size for motion estimation pre-pass", OFFSET(pre_dia_size), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E},

  289. {"subq", "sub pel motion estimation quality", OFFSET(me_subpel_quality), AV_OPT_TYPE_INT, {.dbl = 8 }, INT_MIN, INT_MAX, V|E},

  290. {"dtg_active_format", NULL, OFFSET(dtg_active_format), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX},

  291. {"me_range", "limit motion vectors range (1023 for DivX player)", OFFSET(me_range), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E},

  292. {"ibias", "intra quant bias", OFFSET(intra_quant_bias), AV_OPT_TYPE_INT, {.dbl = FF_DEFAULT_QUANT_BIAS }, INT_MIN, INT_MAX, V|E},

  293. {"pbias", "inter quant bias", OFFSET(inter_quant_bias), AV_OPT_TYPE_INT, {.dbl = FF_DEFAULT_QUANT_BIAS }, INT_MIN, INT_MAX, V|E},

  294. {"color_table_id", NULL, OFFSET(color_table_id), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX},

  295. {"global_quality", NULL, OFFSET(global_quality), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|A|E},

  296. {"coder", NULL, OFFSET(coder_type), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E, "coder"},

  297. {"vlc", "variable length coder / huffman coder", 0, AV_OPT_TYPE_CONST, {.dbl = FF_CODER_TYPE_VLC }, INT_MIN, INT_MAX, V|E, "coder"},

  298. {"ac", "arithmetic coder", 0, AV_OPT_TYPE_CONST, {.dbl = FF_CODER_TYPE_AC }, INT_MIN, INT_MAX, V|E, "coder"},

  299. {"raw", "raw (no encoding)", 0, AV_OPT_TYPE_CONST, {.dbl = FF_CODER_TYPE_RAW }, INT_MIN, INT_MAX, V|E, "coder"},

  300. {"rle", "run-length coder", 0, AV_OPT_TYPE_CONST, {.dbl = FF_CODER_TYPE_RLE }, INT_MIN, INT_MAX, V|E, "coder"},

  301. {"deflate", "deflate-based coder", 0, AV_OPT_TYPE_CONST, {.dbl = FF_CODER_TYPE_DEFLATE }, INT_MIN, INT_MAX, V|E, "coder"},

  302. {"context", "context model", OFFSET(context_model), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E},

  303. {"slice_flags", NULL, OFFSET(slice_flags), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX},

  304. {"xvmc_acceleration", NULL, OFFSET(xvmc_acceleration), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX},

  305. {"mbd", "macroblock decision algorithm (high quality mode)", OFFSET(mb_decision), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E, "mbd"},

  306. {"simple", "use mbcmp (default)", 0, AV_OPT_TYPE_CONST, {.dbl = FF_MB_DECISION_SIMPLE }, INT_MIN, INT_MAX, V|E, "mbd"},

  307. {"bits", "use fewest bits", 0, AV_OPT_TYPE_CONST, {.dbl = FF_MB_DECISION_BITS }, INT_MIN, INT_MAX, V|E, "mbd"},

  308. {"rd", "use best rate distortion", 0, AV_OPT_TYPE_CONST, {.dbl = FF_MB_DECISION_RD }, INT_MIN, INT_MAX, V|E, "mbd"},

  309. {"stream_codec_tag", NULL, OFFSET(stream_codec_tag), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX},

  310. {"sc_threshold", "scene change threshold", OFFSET(scenechange_threshold), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E},

  311. {"lmin", "min lagrange factor (VBR)", OFFSET(lmin), AV_OPT_TYPE_INT, {.dbl =  2*FF_QP2LAMBDA }, 0, INT_MAX, V|E},

  312. {"lmax", "max lagrange factor (VBR)", OFFSET(lmax), AV_OPT_TYPE_INT, {.dbl = 31*FF_QP2LAMBDA }, 0, INT_MAX, V|E},

  313. {"nr", "noise reduction", OFFSET(noise_reduction), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E},

  314. {"rc_init_occupancy", "number of bits which should be loaded into the rc buffer before decoding starts", OFFSET(rc_initial_buffer_occupancy), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E},

  315. {"inter_threshold", NULL, OFFSET(inter_threshold), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E},

  316. {"flags2", NULL, OFFSET(flags2), AV_OPT_TYPE_FLAGS, {.dbl = DEFAULT}, 0, UINT_MAX, V|A|E|D, "flags2"},

  317. {"error", NULL, OFFSET(error_rate), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E},

  318. {"qns", "quantizer noise shaping", OFFSET(quantizer_noise_shaping), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E},

  319. {"threads", NULL, OFFSET(thread_count), AV_OPT_TYPE_INT, {.dbl = 1 }, 0, INT_MAX, V|E|D, "threads"},

  320. {"auto", "detect a good number of threads", 0, AV_OPT_TYPE_CONST, {.dbl = 0 }, INT_MIN, INT_MAX, V|E|D, "threads"},

  321. {"me_threshold", "motion estimaton threshold", OFFSET(me_threshold), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E},

  322. {"mb_threshold", "macroblock threshold", OFFSET(mb_threshold), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E},

  323. {"dc", "intra_dc_precision", OFFSET(intra_dc_precision), AV_OPT_TYPE_INT, {.dbl = 0 }, INT_MIN, INT_MAX, V|E},

  324. {"nssew", "nsse weight", OFFSET(nsse_weight), AV_OPT_TYPE_INT, {.dbl = 8 }, INT_MIN, INT_MAX, V|E},

  325. {"skip_top", "number of macroblock rows at the top which are skipped", OFFSET(skip_top), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|D},

  326. {"skip_bottom", "number of macroblock rows at the bottom which are skipped", OFFSET(skip_bottom), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|D},

  327. {"profile", NULL, OFFSET(profile), AV_OPT_TYPE_INT, {.dbl = FF_PROFILE_UNKNOWN }, INT_MIN, INT_MAX, V|A|E, "profile"},

  328. {"unknown", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_PROFILE_UNKNOWN }, INT_MIN, INT_MAX, V|A|E, "profile"},

  329. {"aac_main", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_PROFILE_AAC_MAIN }, INT_MIN, INT_MAX, A|E, "profile"},

  330. {"aac_low", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_PROFILE_AAC_LOW }, INT_MIN, INT_MAX, A|E, "profile"},

  331. {"aac_ssr", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_PROFILE_AAC_SSR }, INT_MIN, INT_MAX, A|E, "profile"},

  332. {"aac_ltp", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_PROFILE_AAC_LTP }, INT_MIN, INT_MAX, A|E, "profile"},

  333. {"dts", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_PROFILE_DTS }, INT_MIN, INT_MAX, A|E, "profile"},

  334. {"dts_es", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_PROFILE_DTS_ES }, INT_MIN, INT_MAX, A|E, "profile"},

  335. {"dts_96_24", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_PROFILE_DTS_96_24 }, INT_MIN, INT_MAX, A|E, "profile"},

  336. {"dts_hd_hra", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_PROFILE_DTS_HD_HRA }, INT_MIN, INT_MAX, A|E, "profile"},

  337. {"dts_hd_ma", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_PROFILE_DTS_HD_MA }, INT_MIN, INT_MAX, A|E, "profile"},

  338. {"level", NULL, OFFSET(level), AV_OPT_TYPE_INT, {.dbl = FF_LEVEL_UNKNOWN }, INT_MIN, INT_MAX, V|A|E, "level"},

  339. {"unknown", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_LEVEL_UNKNOWN }, INT_MIN, INT_MAX, V|A|E, "level"},

  340. {"lowres", "decode at 1= 1/2, 2=1/4, 3=1/8 resolutions", OFFSET(lowres), AV_OPT_TYPE_INT, {.dbl = 0 }, 0, INT_MAX, V|A|D},

  341. {"skip_threshold", "frame skip threshold", OFFSET(frame_skip_threshold), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E},

  342. {"skip_factor", "frame skip factor", OFFSET(frame_skip_factor), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E},

  343. {"skip_exp", "frame skip exponent", OFFSET(frame_skip_exp), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E},

  344. {"skipcmp", "frame skip compare function", OFFSET(frame_skip_cmp), AV_OPT_TYPE_INT, {.dbl = FF_CMP_DCTMAX }, INT_MIN, INT_MAX, V|E, "cmp_func"},

  345. {"border_mask", "increases the quantizer for macroblocks close to borders", OFFSET(border_masking), AV_OPT_TYPE_FLOAT, {.dbl = DEFAULT }, -FLT_MAX, FLT_MAX, V|E},

  346. {"mblmin", "min macroblock lagrange factor (VBR)", OFFSET(mb_lmin), AV_OPT_TYPE_INT, {.dbl = FF_QP2LAMBDA * 2 }, 1, FF_LAMBDA_MAX, V|E},

  347. {"mblmax", "max macroblock lagrange factor (VBR)", OFFSET(mb_lmax), AV_OPT_TYPE_INT, {.dbl = FF_QP2LAMBDA * 31 }, 1, FF_LAMBDA_MAX, V|E},

  348. {"mepc", "motion estimation bitrate penalty compensation (1.0 = 256)", OFFSET(me_penalty_compensation), AV_OPT_TYPE_INT, {.dbl = 256 }, INT_MIN, INT_MAX, V|E},

  349. {"skip_loop_filter", NULL, OFFSET(skip_loop_filter), AV_OPT_TYPE_INT, {.dbl = AVDISCARD_DEFAULT }, INT_MIN, INT_MAX, V|D, "avdiscard"},

  350. {"skip_idct"       , NULL, OFFSET(skip_idct)       , AV_OPT_TYPE_INT, {.dbl = AVDISCARD_DEFAULT }, INT_MIN, INT_MAX, V|D, "avdiscard"},

  351. {"skip_frame"      , NULL, OFFSET(skip_frame)      , AV_OPT_TYPE_INT, {.dbl = AVDISCARD_DEFAULT }, INT_MIN, INT_MAX, V|D, "avdiscard"},

  352. {"none"            , NULL, 0, AV_OPT_TYPE_CONST, {.dbl = AVDISCARD_NONE    }, INT_MIN, INT_MAX, V|D, "avdiscard"},

  353. {"default"         , NULL, 0, AV_OPT_TYPE_CONST, {.dbl = AVDISCARD_DEFAULT }, INT_MIN, INT_MAX, V|D, "avdiscard"},

  354. {"noref"           , NULL, 0, AV_OPT_TYPE_CONST, {.dbl = AVDISCARD_NONREF  }, INT_MIN, INT_MAX, V|D, "avdiscard"},

  355. {"bidir"           , NULL, 0, AV_OPT_TYPE_CONST, {.dbl = AVDISCARD_BIDIR   }, INT_MIN, INT_MAX, V|D, "avdiscard"},

  356. {"nokey"           , NULL, 0, AV_OPT_TYPE_CONST, {.dbl = AVDISCARD_NONKEY  }, INT_MIN, INT_MAX, V|D, "avdiscard"},

  357. {"all"             , NULL, 0, AV_OPT_TYPE_CONST, {.dbl = AVDISCARD_ALL     }, INT_MIN, INT_MAX, V|D, "avdiscard"},

  358. {"bidir_refine", "refine the two motion vectors used in bidirectional macroblocks", OFFSET(bidir_refine), AV_OPT_TYPE_INT, {.dbl = 1 }, 0, 4, V|E},

  359. {"brd_scale", "downscales frames for dynamic B-frame decision", OFFSET(brd_scale), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, 0, 10, V|E},

  360. {"keyint_min", "minimum interval between IDR-frames (x264)", OFFSET(keyint_min), AV_OPT_TYPE_INT, {.dbl = 25 }, INT_MIN, INT_MAX, V|E},

  361. {"refs", "reference frames to consider for motion compensation (Snow)", OFFSET(refs), AV_OPT_TYPE_INT, {.dbl = 1 }, INT_MIN, INT_MAX, V|E},

  362. {"chromaoffset", "chroma qp offset from luma", OFFSET(chromaoffset), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E},

  363. {"trellis", "rate-distortion optimal quantization", OFFSET(trellis), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|A|E},

  364. {"skiprd", "RD optimal MB level residual skipping", 0, AV_OPT_TYPE_CONST, {.dbl = CODEC_FLAG2_SKIP_RD }, INT_MIN, INT_MAX, V|E, "flags2"},

  365. {"sc_factor", "multiplied by qscale for each frame and added to scene_change_score", OFFSET(scenechange_factor), AV_OPT_TYPE_INT, {.dbl = 6 }, 0, INT_MAX, V|E},

  366. {"mv0_threshold", NULL, OFFSET(mv0_threshold), AV_OPT_TYPE_INT, {.dbl = 256 }, 0, INT_MAX, V|E},

  367. {"b_sensitivity", "adjusts sensitivity of b_frame_strategy 1", OFFSET(b_sensitivity), AV_OPT_TYPE_INT, {.dbl = 40 }, 1, INT_MAX, V|E},

  368. {"compression_level", NULL, OFFSET(compression_level), AV_OPT_TYPE_INT, {.dbl = FF_COMPRESSION_DEFAULT }, INT_MIN, INT_MAX, V|A|E},

  369. {"min_prediction_order", NULL, OFFSET(min_prediction_order), AV_OPT_TYPE_INT, {.dbl = -1 }, INT_MIN, INT_MAX, A|E},

  370. {"max_prediction_order", NULL, OFFSET(max_prediction_order), AV_OPT_TYPE_INT, {.dbl = -1 }, INT_MIN, INT_MAX, A|E},

  371. {"timecode_frame_start", "GOP timecode frame start number, in non drop frame format", OFFSET(timecode_frame_start), AV_OPT_TYPE_INT64, {.dbl = 0 }, 0, INT64_MAX, V|E},

  372. #if FF_API_REQUEST_CHANNELS

  373. {"request_channels", "set desired number of audio channels", OFFSET(request_channels), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, 0, INT_MAX, A|D},

  374. #endif

  375. {"bits_per_raw_sample", NULL, OFFSET(bits_per_raw_sample), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX},

  376. {"channel_layout", NULL, OFFSET(channel_layout), AV_OPT_TYPE_INT64, {.dbl = DEFAULT }, 0, INT64_MAX, A|E|D, "channel_layout"},

  377. {"request_channel_layout", NULL, OFFSET(request_channel_layout), AV_OPT_TYPE_INT64, {.dbl = DEFAULT }, 0, INT64_MAX, A|D, "request_channel_layout"},

  378. {"rc_max_vbv_use", NULL, OFFSET(rc_max_available_vbv_use), AV_OPT_TYPE_FLOAT, {.dbl = 1.0/3 }, 0.0, FLT_MAX, V|E},

  379. {"rc_min_vbv_use", NULL, OFFSET(rc_min_vbv_overflow_use),  AV_OPT_TYPE_FLOAT, {.dbl = 3 },     0.0, FLT_MAX, V|E},

  380. {"ticks_per_frame", NULL, OFFSET(ticks_per_frame), AV_OPT_TYPE_INT, {.dbl = 1 }, 1, INT_MAX, A|V|E|D},

  381. {"color_primaries", NULL, OFFSET(color_primaries), AV_OPT_TYPE_INT, {.dbl = AVCOL_PRI_UNSPECIFIED }, 1, AVCOL_PRI_NB-1, V|E|D},

  382. {"color_trc", NULL, OFFSET(color_trc), AV_OPT_TYPE_INT, {.dbl = AVCOL_TRC_UNSPECIFIED }, 1, AVCOL_TRC_NB-1, V|E|D},

  383. {"colorspace", NULL, OFFSET(colorspace), AV_OPT_TYPE_INT, {.dbl = AVCOL_SPC_UNSPECIFIED }, 1, AVCOL_SPC_NB-1, V|E|D},

  384. {"color_range", NULL, OFFSET(color_range), AV_OPT_TYPE_INT, {.dbl = AVCOL_RANGE_UNSPECIFIED }, 0, AVCOL_RANGE_NB-1, V|E|D},

  385. {"chroma_sample_location", NULL, OFFSET(chroma_sample_location), AV_OPT_TYPE_INT, {.dbl = AVCHROMA_LOC_UNSPECIFIED }, 0, AVCHROMA_LOC_NB-1, V|E|D},

  386. {"log_level_offset", "set the log level offset", OFFSET(log_level_offset), AV_OPT_TYPE_INT, {.dbl = 0 }, INT_MIN, INT_MAX },

  387. {"slices", "number of slices, used in parallelized encoding", OFFSET(slices), AV_OPT_TYPE_INT, {.dbl = 0 }, 0, INT_MAX, V|E},

  388. {"thread_type", "select multithreading type", OFFSET(thread_type), AV_OPT_TYPE_FLAGS, {.dbl = FF_THREAD_SLICE|FF_THREAD_FRAME }, 0, INT_MAX, V|E|D, "thread_type"},

  389. {"slice", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_THREAD_SLICE }, INT_MIN, INT_MAX, V|E|D, "thread_type"},

  390. {"frame", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_THREAD_FRAME }, INT_MIN, INT_MAX, V|E|D, "thread_type"},

  391. {"audio_service_type", "audio service type", OFFSET(audio_service_type), AV_OPT_TYPE_INT, {.dbl = AV_AUDIO_SERVICE_TYPE_MAIN }, 0, AV_AUDIO_SERVICE_TYPE_NB-1, A|E, "audio_service_type"},

  392. {"ma", "Main Audio Service", 0, AV_OPT_TYPE_CONST, {.dbl = AV_AUDIO_SERVICE_TYPE_MAIN },              INT_MIN, INT_MAX, A|E, "audio_service_type"},

  393. {"ef", "Effects",            0, AV_OPT_TYPE_CONST, {.dbl = AV_AUDIO_SERVICE_TYPE_EFFECTS },           INT_MIN, INT_MAX, A|E, "audio_service_type"},

  394. {"vi", "Visually Impaired",  0, AV_OPT_TYPE_CONST, {.dbl = AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED }, INT_MIN, INT_MAX, A|E, "audio_service_type"},

  395. {"hi", "Hearing Impaired",   0, AV_OPT_TYPE_CONST, {.dbl = AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED },  INT_MIN, INT_MAX, A|E, "audio_service_type"},

  396. {"di", "Dialogue",           0, AV_OPT_TYPE_CONST, {.dbl = AV_AUDIO_SERVICE_TYPE_DIALOGUE },          INT_MIN, INT_MAX, A|E, "audio_service_type"},

  397. {"co", "Commentary",         0, AV_OPT_TYPE_CONST, {.dbl = AV_AUDIO_SERVICE_TYPE_COMMENTARY },        INT_MIN, INT_MAX, A|E, "audio_service_type"},

  398. {"em", "Emergency",          0, AV_OPT_TYPE_CONST, {.dbl = AV_AUDIO_SERVICE_TYPE_EMERGENCY },         INT_MIN, INT_MAX, A|E, "audio_service_type"},

  399. {"vo", "Voice Over",         0, AV_OPT_TYPE_CONST, {.dbl = AV_AUDIO_SERVICE_TYPE_VOICE_OVER },        INT_MIN, INT_MAX, A|E, "audio_service_type"},

  400. {"ka", "Karaoke",            0, AV_OPT_TYPE_CONST, {.dbl = AV_AUDIO_SERVICE_TYPE_KARAOKE },           INT_MIN, INT_MAX, A|E, "audio_service_type"},

  401. {"request_sample_fmt", NULL, OFFSET(request_sample_fmt), AV_OPT_TYPE_INT, {.dbl = AV_SAMPLE_FMT_NONE }, AV_SAMPLE_FMT_NONE, AV_SAMPLE_FMT_NB-1, A|D, "request_sample_fmt"},

  402. {"u8" , "8-bit unsigned integer", 0, AV_OPT_TYPE_CONST, {.dbl = AV_SAMPLE_FMT_U8  }, INT_MIN, INT_MAX, A|D, "request_sample_fmt"},

  403. {"s16", "16-bit signed integer",  0, AV_OPT_TYPE_CONST, {.dbl = AV_SAMPLE_FMT_S16 }, INT_MIN, INT_MAX, A|D, "request_sample_fmt"},

  404. {"s32", "32-bit signed integer",  0, AV_OPT_TYPE_CONST, {.dbl = AV_SAMPLE_FMT_S32 }, INT_MIN, INT_MAX, A|D, "request_sample_fmt"},

  405. {"flt", "32-bit float",           0, AV_OPT_TYPE_CONST, {.dbl = AV_SAMPLE_FMT_FLT }, INT_MIN, INT_MAX, A|D, "request_sample_fmt"},

  406. {"dbl", "64-bit double",          0, AV_OPT_TYPE_CONST, {.dbl = AV_SAMPLE_FMT_DBL }, INT_MIN, INT_MAX, A|D, "request_sample_fmt"},

  407. {NULL},

  408. };

  409. 

  410. #undef A

  411. #undef V

  412. #undef S

  413. #undef E

  414. #undef D

  415. #undef DEFAULT

  416. 

  417. static const AVClass av_codec_context_class = {

  418.     .class_name              = "AVCodecContext",

  419.     .item_name               = context_to_name,

  420.     .option                  = options,

  421.     .version                 = LIBAVUTIL_VERSION_INT,

  422.     .log_level_offset_offset = OFFSET(log_level_offset),

  423.     .child_next              = codec_child_next,

  424.     .child_class_next        = codec_child_class_next,

  425. };

  426. 

  427. int avcodec_get_context_defaults3(AVCodecContext *s, AVCodec *codec){

  428.     memset(s, 0, sizeof(AVCodecContext));

  429. 

  430.     s->av_class = &av_codec_context_class;

  431. 

  432.     s->codec_type = codec ? codec->type : AVMEDIA_TYPE_UNKNOWN;

  433.     s->codec      = codec;

  434.     av_opt_set_defaults(s);

  435. 

  436.     s->time_base           = (AVRational){0,1};

  437.     s->get_buffer          = avcodec_default_get_buffer;

  438.     s->release_buffer      = avcodec_default_release_buffer;

  439.     s->get_format          = avcodec_default_get_format;

  440.     s->execute             = avcodec_default_execute;

  441.     s->execute2            = avcodec_default_execute2;

  442.     s->sample_aspect_ratio = (AVRational){0,1};

  443.     s->pix_fmt             = PIX_FMT_NONE;

  444.     s->sample_fmt          = AV_SAMPLE_FMT_NONE;

  445. 

  446.     s->reget_buffer        = avcodec_default_reget_buffer;

  447.     s->reordered_opaque    = AV_NOPTS_VALUE;

  448.     if(codec && codec->priv_data_size){

  449.         if(!s->priv_data){

  450.             s->priv_data= av_mallocz(codec->priv_data_size);

  451.             if (!s->priv_data) {

  452.                 return AVERROR(ENOMEM);

  453.             }

  454.         }

  455.         if(codec->priv_class){

  456.             *(const AVClass**)s->priv_data = codec->priv_class;

  457.             av_opt_set_defaults(s->priv_data);

  458.         }

  459.     }

  460.     if (codec && codec->defaults) {

  461.         int ret;

  462.         const AVCodecDefault *d = codec->defaults;

  463.         while (d->key) {

  464.             ret = av_opt_set(s, d->key, d->value, 0);

  465.             av_assert0(ret >= 0);

  466.             d++;

  467.         }

  468.     }

  469.     return 0;

  470. }

  471. 

  472. AVCodecContext *avcodec_alloc_context3(AVCodec *codec){

  473.     AVCodecContext *avctx= av_malloc(sizeof(AVCodecContext));

  474. 

  475.     if(avctx==NULL) return NULL;

  476. 

  477.     if(avcodec_get_context_defaults3(avctx, codec) < 0){

  478.         av_free(avctx);

  479.         return NULL;

  480.     }

  481. 

  482.     return avctx;

  483. }

  484. 

  485. int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src)

  486. {

  487.     if (avcodec_is_open(dest)) { // check that the dest context is uninitialized

  488.         av_log(dest, AV_LOG_ERROR,

  489.                "Tried to copy AVCodecContext %p into already-initialized %p\n",

  490.                src, dest);

  491.         return AVERROR(EINVAL);

  492.     }

  493.     memcpy(dest, src, sizeof(*dest));

  494. 

  495.     /* set values specific to opened codecs back to their default state */

  496.     dest->priv_data       = NULL;

  497.     dest->codec           = NULL;

  498.     dest->slice_offset    = NULL;

  499.     dest->hwaccel         = NULL;

  500.     dest->thread_opaque   = NULL;

  501.     dest->internal        = NULL;

  502. 

  503.     /* reallocate values that should be allocated separately */

  504.     dest->rc_eq           = NULL;

  505.     dest->extradata       = NULL;

  506.     dest->intra_matrix    = NULL;

  507.     dest->inter_matrix    = NULL;

  508.     dest->rc_override     = NULL;

  509.     if (src->rc_eq) {

  510.         dest->rc_eq = av_strdup(src->rc_eq);

  511.         if (!dest->rc_eq)

  512.             return AVERROR(ENOMEM);

  513.     }

  514. 

  515. #define alloc_and_copy_or_fail(obj, size, pad) \

  516.     if (src->obj && size > 0) { \

  517.         dest->obj = av_malloc(size + pad); \

  518.         if (!dest->obj) \

  519.             goto fail; \

  520.         memcpy(dest->obj, src->obj, size); \

  521.         if (pad) \

  522.             memset(((uint8_t *) dest->obj) + size, 0, pad); \

  523.     }

  524.     alloc_and_copy_or_fail(extradata,    src->extradata_size,

  525.                            FF_INPUT_BUFFER_PADDING_SIZE);

  526.     alloc_and_copy_or_fail(intra_matrix, 64 * sizeof(int16_t), 0);

  527.     alloc_and_copy_or_fail(inter_matrix, 64 * sizeof(int16_t), 0);

  528.     alloc_and_copy_or_fail(rc_override,  src->rc_override_count * sizeof(*src->rc_override), 0);

  529. #undef alloc_and_copy_or_fail

  530. 

  531.     return 0;

  532. 

  533. fail:

  534.     av_freep(&dest->rc_override);

  535.     av_freep(&dest->intra_matrix);

  536.     av_freep(&dest->inter_matrix);

  537.     av_freep(&dest->extradata);

  538.     av_freep(&dest->rc_eq);

  539.     return AVERROR(ENOMEM);

  540. }

  541. 

  542. const AVClass *avcodec_get_class(void)

  543. {

  544.     return &av_codec_context_class;

  545. }