| 1 | /* |
| 2 | * Copyright (c) 2001 Fabrice Bellard |
| 3 | * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at> |
| 4 | * |
| 5 | * This file is part of FFmpeg. |
| 6 | * |
| 7 | * FFmpeg 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 | * FFmpeg 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 FFmpeg; 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/internal.h" |
| 31 | #include "libavutil/mem.h" |
| 32 | #include "libavutil/opt.h" |
| 33 | #include <float.h> /* FLT_MIN, FLT_MAX */ |
| 34 | #include <string.h> |
| 35 | |
| 36 | #include "options_table.h" |
| 37 | |
| 38 | static const char* context_to_name(void* ptr) { |
| 39 | AVCodecContext *avc= ptr; |
| 40 | |
| 41 | if(avc && avc->codec && avc->codec->name) |
| 42 | return avc->codec->name; |
| 43 | else |
| 44 | return "NULL"; |
| 45 | } |
| 46 | |
| 47 | static void *codec_child_next(void *obj, void *prev) |
| 48 | { |
| 49 | AVCodecContext *s = obj; |
| 50 | if (!prev && s->codec && s->codec->priv_class && s->priv_data) |
| 51 | return s->priv_data; |
| 52 | return NULL; |
| 53 | } |
| 54 | |
| 55 | static const AVClass *codec_child_class_next(const AVClass *prev) |
| 56 | { |
| 57 | AVCodec *c = NULL; |
| 58 | |
| 59 | /* find the codec that corresponds to prev */ |
| 60 | while (prev && (c = av_codec_next(c))) |
| 61 | if (c->priv_class == prev) |
| 62 | break; |
| 63 | |
| 64 | /* find next codec with priv options */ |
| 65 | while (c = av_codec_next(c)) |
| 66 | if (c->priv_class) |
| 67 | return c->priv_class; |
| 68 | return NULL; |
| 69 | } |
| 70 | |
| 71 | static AVClassCategory get_category(void *ptr) |
| 72 | { |
| 73 | AVCodecContext* avctx = ptr; |
| 74 | if(avctx->codec && avctx->codec->decode) return AV_CLASS_CATEGORY_DECODER; |
| 75 | else return AV_CLASS_CATEGORY_ENCODER; |
| 76 | } |
| 77 | |
| 78 | static const AVClass av_codec_context_class = { |
| 79 | .class_name = "AVCodecContext", |
| 80 | .item_name = context_to_name, |
| 81 | .option = avcodec_options, |
| 82 | .version = LIBAVUTIL_VERSION_INT, |
| 83 | .log_level_offset_offset = offsetof(AVCodecContext, log_level_offset), |
| 84 | .child_next = codec_child_next, |
| 85 | .child_class_next = codec_child_class_next, |
| 86 | .category = AV_CLASS_CATEGORY_ENCODER, |
| 87 | .get_category = get_category, |
| 88 | }; |
| 89 | |
| 90 | int avcodec_get_context_defaults3(AVCodecContext *s, const AVCodec *codec) |
| 91 | { |
| 92 | int flags=0; |
| 93 | memset(s, 0, sizeof(AVCodecContext)); |
| 94 | |
| 95 | s->av_class = &av_codec_context_class; |
| 96 | |
| 97 | s->codec_type = codec ? codec->type : AVMEDIA_TYPE_UNKNOWN; |
| 98 | if (codec) { |
| 99 | s->codec = codec; |
| 100 | s->codec_id = codec->id; |
| 101 | } |
| 102 | |
| 103 | if(s->codec_type == AVMEDIA_TYPE_AUDIO) |
| 104 | flags= AV_OPT_FLAG_AUDIO_PARAM; |
| 105 | else if(s->codec_type == AVMEDIA_TYPE_VIDEO) |
| 106 | flags= AV_OPT_FLAG_VIDEO_PARAM; |
| 107 | else if(s->codec_type == AVMEDIA_TYPE_SUBTITLE) |
| 108 | flags= AV_OPT_FLAG_SUBTITLE_PARAM; |
| 109 | av_opt_set_defaults2(s, flags, flags); |
| 110 | |
| 111 | s->time_base = (AVRational){0,1}; |
| 112 | s->framerate = (AVRational){ 0, 1 }; |
| 113 | s->pkt_timebase = (AVRational){ 0, 1 }; |
| 114 | s->get_buffer2 = avcodec_default_get_buffer2; |
| 115 | s->get_format = avcodec_default_get_format; |
| 116 | s->execute = avcodec_default_execute; |
| 117 | s->execute2 = avcodec_default_execute2; |
| 118 | s->sample_aspect_ratio = (AVRational){0,1}; |
| 119 | s->pix_fmt = AV_PIX_FMT_NONE; |
| 120 | s->sample_fmt = AV_SAMPLE_FMT_NONE; |
| 121 | |
| 122 | s->reordered_opaque = AV_NOPTS_VALUE; |
| 123 | if(codec && codec->priv_data_size){ |
| 124 | if(!s->priv_data){ |
| 125 | s->priv_data= av_mallocz(codec->priv_data_size); |
| 126 | if (!s->priv_data) { |
| 127 | return AVERROR(ENOMEM); |
| 128 | } |
| 129 | } |
| 130 | if(codec->priv_class){ |
| 131 | *(const AVClass**)s->priv_data = codec->priv_class; |
| 132 | av_opt_set_defaults(s->priv_data); |
| 133 | } |
| 134 | } |
| 135 | if (codec && codec->defaults) { |
| 136 | int ret; |
| 137 | const AVCodecDefault *d = codec->defaults; |
| 138 | while (d->key) { |
| 139 | ret = av_opt_set(s, d->key, d->value, 0); |
| 140 | av_assert0(ret >= 0); |
| 141 | d++; |
| 142 | } |
| 143 | } |
| 144 | return 0; |
| 145 | } |
| 146 | |
| 147 | AVCodecContext *avcodec_alloc_context3(const AVCodec *codec) |
| 148 | { |
| 149 | AVCodecContext *avctx= av_malloc(sizeof(AVCodecContext)); |
| 150 | |
| 151 | if (!avctx) |
| 152 | return NULL; |
| 153 | |
| 154 | if(avcodec_get_context_defaults3(avctx, codec) < 0){ |
| 155 | av_free(avctx); |
| 156 | return NULL; |
| 157 | } |
| 158 | |
| 159 | return avctx; |
| 160 | } |
| 161 | |
| 162 | void avcodec_free_context(AVCodecContext **pavctx) |
| 163 | { |
| 164 | AVCodecContext *avctx = *pavctx; |
| 165 | |
| 166 | if (!avctx) |
| 167 | return; |
| 168 | |
| 169 | avcodec_close(avctx); |
| 170 | |
| 171 | av_freep(&avctx->extradata); |
| 172 | av_freep(&avctx->subtitle_header); |
| 173 | av_freep(&avctx->intra_matrix); |
| 174 | av_freep(&avctx->inter_matrix); |
| 175 | av_freep(&avctx->rc_override); |
| 176 | |
| 177 | av_freep(pavctx); |
| 178 | } |
| 179 | |
| 180 | int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src) |
| 181 | { |
| 182 | const AVCodec *orig_codec = dest->codec; |
| 183 | uint8_t *orig_priv_data = dest->priv_data; |
| 184 | |
| 185 | if (avcodec_is_open(dest)) { // check that the dest context is uninitialized |
| 186 | av_log(dest, AV_LOG_ERROR, |
| 187 | "Tried to copy AVCodecContext %p into already-initialized %p\n", |
| 188 | src, dest); |
| 189 | return AVERROR(EINVAL); |
| 190 | } |
| 191 | |
| 192 | av_opt_free(dest); |
| 193 | |
| 194 | memcpy(dest, src, sizeof(*dest)); |
| 195 | av_opt_copy(dest, src); |
| 196 | |
| 197 | dest->priv_data = orig_priv_data; |
| 198 | |
| 199 | if (orig_priv_data) |
| 200 | av_opt_copy(orig_priv_data, src->priv_data); |
| 201 | |
| 202 | dest->codec = orig_codec; |
| 203 | |
| 204 | /* set values specific to opened codecs back to their default state */ |
| 205 | dest->slice_offset = NULL; |
| 206 | dest->hwaccel = NULL; |
| 207 | dest->internal = NULL; |
| 208 | |
| 209 | /* reallocate values that should be allocated separately */ |
| 210 | dest->extradata = NULL; |
| 211 | dest->intra_matrix = NULL; |
| 212 | dest->inter_matrix = NULL; |
| 213 | dest->rc_override = NULL; |
| 214 | dest->subtitle_header = NULL; |
| 215 | |
| 216 | #define alloc_and_copy_or_fail(obj, size, pad) \ |
| 217 | if (src->obj && size > 0) { \ |
| 218 | dest->obj = av_malloc(size + pad); \ |
| 219 | if (!dest->obj) \ |
| 220 | goto fail; \ |
| 221 | memcpy(dest->obj, src->obj, size); \ |
| 222 | if (pad) \ |
| 223 | memset(((uint8_t *) dest->obj) + size, 0, pad); \ |
| 224 | } |
| 225 | alloc_and_copy_or_fail(extradata, src->extradata_size, |
| 226 | FF_INPUT_BUFFER_PADDING_SIZE); |
| 227 | alloc_and_copy_or_fail(intra_matrix, 64 * sizeof(int16_t), 0); |
| 228 | alloc_and_copy_or_fail(inter_matrix, 64 * sizeof(int16_t), 0); |
| 229 | alloc_and_copy_or_fail(rc_override, src->rc_override_count * sizeof(*src->rc_override), 0); |
| 230 | alloc_and_copy_or_fail(subtitle_header, src->subtitle_header_size, 1); |
| 231 | av_assert0(dest->subtitle_header_size == src->subtitle_header_size); |
| 232 | #undef alloc_and_copy_or_fail |
| 233 | |
| 234 | return 0; |
| 235 | |
| 236 | fail: |
| 237 | av_freep(&dest->rc_override); |
| 238 | av_freep(&dest->intra_matrix); |
| 239 | av_freep(&dest->inter_matrix); |
| 240 | av_freep(&dest->extradata); |
| 241 | #if FF_API_MPV_OPT |
| 242 | FF_DISABLE_DEPRECATION_WARNINGS |
| 243 | av_freep(&dest->rc_eq); |
| 244 | FF_ENABLE_DEPRECATION_WARNINGS |
| 245 | #endif |
| 246 | return AVERROR(ENOMEM); |
| 247 | } |
| 248 | |
| 249 | const AVClass *avcodec_get_class(void) |
| 250 | { |
| 251 | return &av_codec_context_class; |
| 252 | } |
| 253 | |
| 254 | #define FOFFSET(x) offsetof(AVFrame,x) |
| 255 | |
| 256 | static const AVOption frame_options[]={ |
| 257 | {"best_effort_timestamp", "", FOFFSET(best_effort_timestamp), AV_OPT_TYPE_INT64, {.i64 = AV_NOPTS_VALUE }, INT64_MIN, INT64_MAX, 0}, |
| 258 | {"pkt_pos", "", FOFFSET(pkt_pos), AV_OPT_TYPE_INT64, {.i64 = -1 }, INT64_MIN, INT64_MAX, 0}, |
| 259 | {"pkt_size", "", FOFFSET(pkt_size), AV_OPT_TYPE_INT64, {.i64 = -1 }, INT64_MIN, INT64_MAX, 0}, |
| 260 | {"sample_aspect_ratio", "", FOFFSET(sample_aspect_ratio), AV_OPT_TYPE_RATIONAL, {.dbl = 0 }, 0, INT_MAX, 0}, |
| 261 | {"width", "", FOFFSET(width), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0}, |
| 262 | {"height", "", FOFFSET(height), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0}, |
| 263 | {"format", "", FOFFSET(format), AV_OPT_TYPE_INT, {.i64 = -1 }, 0, INT_MAX, 0}, |
| 264 | {"channel_layout", "", FOFFSET(channel_layout), AV_OPT_TYPE_INT64, {.i64 = 0 }, 0, INT64_MAX, 0}, |
| 265 | {"sample_rate", "", FOFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0}, |
| 266 | {NULL}, |
| 267 | }; |
| 268 | |
| 269 | static const AVClass av_frame_class = { |
| 270 | .class_name = "AVFrame", |
| 271 | .item_name = NULL, |
| 272 | .option = frame_options, |
| 273 | .version = LIBAVUTIL_VERSION_INT, |
| 274 | }; |
| 275 | |
| 276 | const AVClass *avcodec_get_frame_class(void) |
| 277 | { |
| 278 | return &av_frame_class; |
| 279 | } |
| 280 | |
| 281 | #define SROFFSET(x) offsetof(AVSubtitleRect,x) |
| 282 | |
| 283 | static const AVOption subtitle_rect_options[]={ |
| 284 | {"x", "", SROFFSET(x), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0}, |
| 285 | {"y", "", SROFFSET(y), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0}, |
| 286 | {"w", "", SROFFSET(w), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0}, |
| 287 | {"h", "", SROFFSET(h), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0}, |
| 288 | {"type", "", SROFFSET(type), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0}, |
| 289 | {"flags", "", SROFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, 0, 1, 0, "flags"}, |
| 290 | {"forced", "", SROFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, 0, 1, 0}, |
| 291 | {NULL}, |
| 292 | }; |
| 293 | |
| 294 | static const AVClass av_subtitle_rect_class = { |
| 295 | .class_name = "AVSubtitleRect", |
| 296 | .item_name = NULL, |
| 297 | .option = subtitle_rect_options, |
| 298 | .version = LIBAVUTIL_VERSION_INT, |
| 299 | }; |
| 300 | |
| 301 | const AVClass *avcodec_get_subtitle_rect_class(void) |
| 302 | { |
| 303 | return &av_subtitle_rect_class; |
| 304 | } |