diff options
Diffstat (limited to 'ffmpeg/libavcodec/options.c')
| -rw-r--r-- | ffmpeg/libavcodec/options.c | 294 |
1 files changed, 294 insertions, 0 deletions
diff --git a/ffmpeg/libavcodec/options.c b/ffmpeg/libavcodec/options.c new file mode 100644 index 0000000..1d10128 --- /dev/null +++ b/ffmpeg/libavcodec/options.c @@ -0,0 +1,294 @@ +/* + * 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 = 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, +}; + +#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, 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(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; +} + +#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, {.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; +} |