/* * Copyright (c) 2001 Fabrice Bellard * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at> * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file * Options definition for AVCodecContext. */ #include "avcodec.h" #include "internal.h" #include "libavutil/avassert.h" #include "libavutil/opt.h" #include <float.h> /* FLT_MIN, FLT_MAX */ #include "options_table.h" static const char* context_to_name(void* ptr) { AVCodecContext *avc= ptr; if(avc && avc->codec && avc->codec->name) return avc->codec->name; else return "NULL"; } static void *codec_child_next(void *obj, void *prev) { AVCodecContext *s = obj; if (!prev && s->codec && s->codec->priv_class && s->priv_data) return s->priv_data; return NULL; } static const AVClass *codec_child_class_next(const AVClass *prev) { AVCodec *c = NULL; /* find the codec that corresponds to prev */ while (prev && (c = av_codec_next(c))) if (c->priv_class == prev) break; /* find next codec with priv options */ while (c = av_codec_next(c)) if (c->priv_class) return c->priv_class; return NULL; } static const AVClass av_codec_context_class = { .class_name = "AVCodecContext", .item_name = context_to_name, .option = options, .version = LIBAVUTIL_VERSION_INT, .log_level_offset_offset = offsetof(AVCodecContext, log_level_offset), .child_next = codec_child_next, .child_class_next = codec_child_class_next, }; #if FF_API_ALLOC_CONTEXT void avcodec_get_context_defaults2(AVCodecContext *s, enum AVMediaType codec_type){ AVCodec c= {0}; c.type= codec_type; avcodec_get_context_defaults3(s, &c); } #endif int avcodec_get_context_defaults3(AVCodecContext *s, AVCodec *codec){ int flags=0; memset(s, 0, sizeof(AVCodecContext)); s->av_class = &av_codec_context_class; s->codec_type = codec ? codec->type : AVMEDIA_TYPE_UNKNOWN; if(s->codec_type == AVMEDIA_TYPE_AUDIO) flags= AV_OPT_FLAG_AUDIO_PARAM; else if(s->codec_type == AVMEDIA_TYPE_VIDEO) flags= AV_OPT_FLAG_VIDEO_PARAM; else if(s->codec_type == AVMEDIA_TYPE_SUBTITLE) flags= AV_OPT_FLAG_SUBTITLE_PARAM; av_opt_set_defaults2(s, flags, flags); s->time_base = (AVRational){0,1}; s->get_buffer = avcodec_default_get_buffer; s->release_buffer = avcodec_default_release_buffer; s->get_format = avcodec_default_get_format; s->execute = avcodec_default_execute; s->execute2 = avcodec_default_execute2; s->sample_aspect_ratio = (AVRational){0,1}; s->pix_fmt = PIX_FMT_NONE; s->sample_fmt = AV_SAMPLE_FMT_NONE; s->timecode_frame_start = -1; s->reget_buffer = avcodec_default_reget_buffer; s->reordered_opaque = AV_NOPTS_VALUE; if(codec && codec->priv_data_size){ if(!s->priv_data){ s->priv_data= av_mallocz(codec->priv_data_size); if (!s->priv_data) { return AVERROR(ENOMEM); } } if(codec->priv_class){ *(const AVClass**)s->priv_data = codec->priv_class; av_opt_set_defaults(s->priv_data); } } if (codec && codec->defaults) { int ret; const AVCodecDefault *d = codec->defaults; while (d->key) { ret = av_opt_set(s, d->key, d->value, 0); av_assert0(ret >= 0); d++; } } return 0; } AVCodecContext *avcodec_alloc_context3(AVCodec *codec){ AVCodecContext *avctx= av_malloc(sizeof(AVCodecContext)); if(avctx==NULL) return NULL; if(avcodec_get_context_defaults3(avctx, codec) < 0){ av_free(avctx); return NULL; } return avctx; } #if FF_API_ALLOC_CONTEXT AVCodecContext *avcodec_alloc_context2(enum AVMediaType codec_type){ AVCodecContext *avctx= av_malloc(sizeof(AVCodecContext)); if(avctx==NULL) return NULL; avcodec_get_context_defaults2(avctx, codec_type); return avctx; } void avcodec_get_context_defaults(AVCodecContext *s){ avcodec_get_context_defaults2(s, AVMEDIA_TYPE_UNKNOWN); } AVCodecContext *avcodec_alloc_context(void){ return avcodec_alloc_context2(AVMEDIA_TYPE_UNKNOWN); } #endif int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src) { if (avcodec_is_open(dest)) { // check that the dest context is uninitialized av_log(dest, AV_LOG_ERROR, "Tried to copy AVCodecContext %p into already-initialized %p\n", src, dest); return AVERROR(EINVAL); } memcpy(dest, src, sizeof(*dest)); /* set values specific to opened codecs back to their default state */ dest->priv_data = NULL; dest->codec = NULL; dest->slice_offset = NULL; dest->hwaccel = NULL; dest->thread_opaque = NULL; dest->internal = NULL; /* reallocate values that should be allocated separately */ dest->rc_eq = NULL; dest->extradata = NULL; dest->intra_matrix = NULL; dest->inter_matrix = NULL; dest->rc_override = NULL; if (src->rc_eq) { dest->rc_eq = av_strdup(src->rc_eq); if (!dest->rc_eq) return AVERROR(ENOMEM); } #define alloc_and_copy_or_fail(obj, size, pad) \ if (src->obj && size > 0) { \ dest->obj = av_malloc(size + pad); \ if (!dest->obj) \ goto fail; \ memcpy(dest->obj, src->obj, size); \ if (pad) \ memset(((uint8_t *) dest->obj) + size, 0, pad); \ } alloc_and_copy_or_fail(extradata, src->extradata_size, FF_INPUT_BUFFER_PADDING_SIZE); alloc_and_copy_or_fail(intra_matrix, 64 * sizeof(int16_t), 0); alloc_and_copy_or_fail(inter_matrix, 64 * sizeof(int16_t), 0); alloc_and_copy_or_fail(rc_override, src->rc_override_count * sizeof(*src->rc_override), 0); #undef alloc_and_copy_or_fail return 0; fail: av_freep(&dest->rc_override); av_freep(&dest->intra_matrix); av_freep(&dest->inter_matrix); av_freep(&dest->extradata); av_freep(&dest->rc_eq); return AVERROR(ENOMEM); } const AVClass *avcodec_get_class(void) { return &av_codec_context_class; } #define FOFFSET(x) offsetof(AVFrame,x) static const AVOption frame_options[]={ {"best_effort_timestamp", "", FOFFSET(best_effort_timestamp), AV_OPT_TYPE_INT64, {.dbl = AV_NOPTS_VALUE }, INT64_MIN, INT64_MAX, 0}, {"pkt_pos", "", FOFFSET(pkt_pos), AV_OPT_TYPE_INT64, {.dbl = -1 }, INT64_MIN, INT64_MAX, 0}, {"sample_aspect_ratio", "", FOFFSET(sample_aspect_ratio), AV_OPT_TYPE_RATIONAL, {.dbl = 0 }, 0, INT_MAX, 0}, {"width", "", FOFFSET(width), AV_OPT_TYPE_INT, {.dbl = 0 }, 0, INT_MAX, 0}, {"height", "", FOFFSET(height), AV_OPT_TYPE_INT, {.dbl = 0 }, 0, INT_MAX, 0}, {"format", "", FOFFSET(format), AV_OPT_TYPE_INT, {.dbl = -1 }, 0, INT_MAX, 0}, {NULL}, }; static const AVClass av_frame_class = { .class_name = "AVFrame", .item_name = NULL, .option = frame_options, .version = LIBAVUTIL_VERSION_INT, }; const AVClass *avcodec_get_frame_class(void) { return &av_frame_class; }