/* * 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/internal.h" #include "libavutil/mem.h" #include "libavutil/opt.h" #include <float.h> /* FLT_MIN, FLT_MAX */ #include <string.h> FF_DISABLE_DEPRECATION_WARNINGS #include "options_table.h" FF_ENABLE_DEPRECATION_WARNINGS 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 = 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->framerate = (AVRational){ 0, 1 }; s->pkt_timebase = (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->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) return NULL; if(avcodec_get_context_defaults3(avctx, codec) < 0){ av_free(avctx); return NULL; } return avctx; } void avcodec_free_context(AVCodecContext **pavctx) { AVCodecContext *avctx = *pavctx; if (!avctx) return; avcodec_close(avctx); av_freep(&avctx->extradata); av_freep(&avctx->subtitle_header); av_freep(&avctx->intra_matrix); av_freep(&avctx->inter_matrix); av_freep(&avctx->rc_override); av_freep(pavctx); } int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src) { const AVCodec *orig_codec = dest->codec; uint8_t *orig_priv_data = dest->priv_data; 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_freep(&dest->rc_override); av_freep(&dest->intra_matrix); av_freep(&dest->inter_matrix); av_freep(&dest->extradata); av_freep(&dest->subtitle_header); memcpy(dest, src, sizeof(*dest)); av_opt_copy(dest, src); dest->priv_data = orig_priv_data; dest->codec = orig_codec; if (orig_priv_data && src->codec && src->codec->priv_class && dest->codec && dest->codec->priv_class) av_opt_copy(orig_priv_data, src->priv_data); /* set values specific to opened codecs back to their default state */ dest->slice_offset = NULL; dest->hwaccel = NULL; dest->internal = NULL; #if FF_API_CODED_FRAME FF_DISABLE_DEPRECATION_WARNINGS dest->coded_frame = NULL; FF_ENABLE_DEPRECATION_WARNINGS #endif /* reallocate values that should be allocated separately */ dest->extradata = NULL; dest->intra_matrix = NULL; dest->inter_matrix = NULL; dest->rc_override = NULL; dest->subtitle_header = NULL; #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, AV_INPUT_BUFFER_PADDING_SIZE); dest->extradata_size = src->extradata_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); av_assert0(dest->subtitle_header_size == src->subtitle_header_size); #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->subtitle_header); dest->subtitle_header_size = 0; dest->extradata_size = 0; av_opt_free(dest); 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; } #ifdef TEST static int dummy_init(AVCodecContext *ctx) { //TODO: this code should set every possible pointer that could be set by codec and is not an option; ctx->extradata_size = 8; ctx->extradata = av_malloc(ctx->extradata_size); return 0; } static int dummy_close(AVCodecContext *ctx) { av_freep(&ctx->extradata); ctx->extradata_size = 0; return 0; } static int dummy_encode(AVCodecContext *ctx, AVPacket *pkt, const AVFrame *frame, int *got_packet) { return AVERROR(ENOSYS); } typedef struct Dummy12Context { AVClass *av_class; int num; char* str; } Dummy12Context; typedef struct Dummy3Context { void *fake_av_class; int num; char* str; } Dummy3Context; #define OFFSET(x) offsetof(Dummy12Context, x) #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM static const AVOption dummy_options[] = { { "str", "set str", OFFSET(str), AV_OPT_TYPE_STRING, { .str = "i'm src default value" }, 0, 0, VE}, { "num", "set num", OFFSET(num), AV_OPT_TYPE_INT, { .i64 = 1500100900 }, 0, INT_MAX, VE}, { NULL }, }; static const AVClass dummy_v1_class = { .class_name = "dummy_v1_class", .item_name = av_default_item_name, .option = dummy_options, .version = LIBAVUTIL_VERSION_INT, }; static const AVClass dummy_v2_class = { .class_name = "dummy_v2_class", .item_name = av_default_item_name, .option = dummy_options, .version = LIBAVUTIL_VERSION_INT, }; /* codec with options */ static AVCodec dummy_v1_encoder = { .name = "dummy_v1_codec", .type = AVMEDIA_TYPE_VIDEO, .id = AV_CODEC_ID_NONE - 1, .encode2 = dummy_encode, .init = dummy_init, .close = dummy_close, .priv_class = &dummy_v1_class, .priv_data_size = sizeof(Dummy12Context), }; /* codec with options, different class */ static AVCodec dummy_v2_encoder = { .name = "dummy_v2_codec", .type = AVMEDIA_TYPE_VIDEO, .id = AV_CODEC_ID_NONE - 2, .encode2 = dummy_encode, .init = dummy_init, .close = dummy_close, .priv_class = &dummy_v2_class, .priv_data_size = sizeof(Dummy12Context), }; /* codec with priv data, but no class */ static AVCodec dummy_v3_encoder = { .name = "dummy_v3_codec", .type = AVMEDIA_TYPE_VIDEO, .id = AV_CODEC_ID_NONE - 3, .encode2 = dummy_encode, .init = dummy_init, .close = dummy_close, .priv_data_size = sizeof(Dummy3Context), }; /* codec without priv data */ static AVCodec dummy_v4_encoder = { .name = "dummy_v4_codec", .type = AVMEDIA_TYPE_VIDEO, .id = AV_CODEC_ID_NONE - 4, .encode2 = dummy_encode, .init = dummy_init, .close = dummy_close, }; static void test_copy_print_codec(const AVCodecContext *ctx) { printf("%-14s: %dx%d prv: %s", ctx->codec ? ctx->codec->name : "NULL", ctx->width, ctx->height, ctx->priv_data ? "set" : "null"); if (ctx->codec && ctx->codec->priv_class && ctx->codec->priv_data_size) { int64_t i64; char *str = NULL; av_opt_get_int(ctx->priv_data, "num", 0, &i64); av_opt_get(ctx->priv_data, "str", 0, (uint8_t**)&str); printf(" opts: %"PRId64" %s", i64, str); av_free(str); } printf("\n"); } static void test_copy(const AVCodec *c1, const AVCodec *c2) { AVCodecContext *ctx1, *ctx2; printf("%s -> %s\nclosed:\n", c1 ? c1->name : "NULL", c2 ? c2->name : "NULL"); ctx1 = avcodec_alloc_context3(c1); ctx2 = avcodec_alloc_context3(c2); ctx1->width = ctx1->height = 128; if (ctx2->codec && ctx2->codec->priv_class && ctx2->codec->priv_data_size) { av_opt_set(ctx2->priv_data, "num", "667", 0); av_opt_set(ctx2->priv_data, "str", "i'm dest value before copy", 0); } avcodec_copy_context(ctx2, ctx1); test_copy_print_codec(ctx1); test_copy_print_codec(ctx2); if (ctx1->codec) { printf("opened:\n"); avcodec_open2(ctx1, ctx1->codec, NULL); if (ctx2->codec && ctx2->codec->priv_class && ctx2->codec->priv_data_size) { av_opt_set(ctx2->priv_data, "num", "667", 0); av_opt_set(ctx2->priv_data, "str", "i'm dest value before copy", 0); } avcodec_copy_context(ctx2, ctx1); test_copy_print_codec(ctx1); test_copy_print_codec(ctx2); avcodec_close(ctx1); } avcodec_free_context(&ctx1); avcodec_free_context(&ctx2); } int main(void) { AVCodec *dummy_codec[] = { &dummy_v1_encoder, &dummy_v2_encoder, &dummy_v3_encoder, &dummy_v4_encoder, NULL, }; int i, j; for (i = 0; dummy_codec[i]; i++) avcodec_register(dummy_codec[i]); printf("testing avcodec_copy_context()\n"); for (i = 0; i < FF_ARRAY_ELEMS(dummy_codec); i++) for (j = 0; j < FF_ARRAY_ELEMS(dummy_codec); j++) test_copy(dummy_codec[i], dummy_codec[j]); return 0; } #endif