| /* |
| * 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/mem.h" |
| #include "libavutil/opt.h" |
| #include <float.h> /* FLT_MIN, FLT_MAX */ |
| #include <string.h> |
| |
| #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 AVClassCategory get_category(void *ptr) |
| { |
| AVCodecContext* avctx = ptr; |
| if(avctx->codec && avctx->codec->decode) return AV_CLASS_CATEGORY_DECODER; |
| else return AV_CLASS_CATEGORY_ENCODER; |
| } |
| |
| static const AVClass av_codec_context_class = { |
| .class_name = "AVCodecContext", |
| .item_name = context_to_name, |
| .option = avcodec_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, |
| .category = AV_CLASS_CATEGORY_ENCODER, |
| .get_category = get_category, |
| }; |
| |
| int avcodec_get_context_defaults3(AVCodecContext *s, const 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 (codec) |
| s->codec_id = codec->id; |
| |
| 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_buffer2 = avcodec_default_get_buffer2; |
| 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 = AV_PIX_FMT_NONE; |
| s->sample_fmt = AV_SAMPLE_FMT_NONE; |
| s->timecode_frame_start = -1; |
| |
| 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(const 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; |
| } |
| |
| 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); |
| } |
| |
| av_opt_free(dest); |
| av_free(dest->priv_data); |
| |
| 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->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); |
| alloc_and_copy_or_fail(subtitle_header, src->subtitle_header_size, 1); |
| #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, {.i64 = AV_NOPTS_VALUE }, INT64_MIN, INT64_MAX, 0}, |
| {"pkt_pos", "", FOFFSET(pkt_pos), AV_OPT_TYPE_INT64, {.i64 = -1 }, INT64_MIN, INT64_MAX, 0}, |
| {"pkt_size", "", FOFFSET(pkt_size), AV_OPT_TYPE_INT64, {.i64 = -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, {.i64 = 0 }, 0, INT_MAX, 0}, |
| {"height", "", FOFFSET(height), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0}, |
| {"format", "", FOFFSET(format), AV_OPT_TYPE_INT, {.i64 = -1 }, 0, INT_MAX, 0}, |
| {"channel_layout", "", FOFFSET(channel_layout), AV_OPT_TYPE_INT64, {.i64 = 0 }, 0, INT64_MAX, 0}, |
| {"sample_rate", "", FOFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64 = 0 }, 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; |
| } |
| |
| #define SROFFSET(x) offsetof(AVSubtitleRect,x) |
| |
| static const AVOption subtitle_rect_options[]={ |
| {"x", "", SROFFSET(x), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0}, |
| {"y", "", SROFFSET(y), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0}, |
| {"w", "", SROFFSET(w), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0}, |
| {"h", "", SROFFSET(h), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0}, |
| {"type", "", SROFFSET(type), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0}, |
| {"flags", "", SROFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, 0, 1, 0, "flags"}, |
| {"forced", "", SROFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, 0, 1, 0}, |
| {NULL}, |
| }; |
| |
| static const AVClass av_subtitle_rect_class = { |
| .class_name = "AVSubtitleRect", |
| .item_name = NULL, |
| .option = subtitle_rect_options, |
| .version = LIBAVUTIL_VERSION_INT, |
| }; |
| |
| const AVClass *avcodec_get_subtitle_rect_class(void) |
| { |
| return &av_subtitle_rect_class; |
| } |