/* * 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 */ #include "libavutil/opt.h"#include "libavcodec/codec.h"#include "libavcodec/codec_desc.h"#include "libavcodec/codec_internal.h"#include "libavcodec/internal.h" static const char *get_type_string(enum AVMediaType type){    const char *ret = av_get_media_type_string(type);    return ret ? ret : "unknown";} #define AV_LOG(...) av_log(NULL, AV_LOG_FATAL, __VA_ARGS__)#define ERR_INTERNAL(msg, ...)                                  \do {                                                            \    AV_LOG(msg, codec->name __VA_ARGS__);                       \    ret = 1;                                                    \} while (0)#define ERR(msg)           ERR_INTERNAL(msg, )#define ERR_EXT(msg, ...)  ERR_INTERNAL(msg, , __VA_ARGS__) static int priv_data_size_wrong(const FFCodec *codec){    if (codec->priv_data_size < 0 ||        codec->p.priv_class && codec->priv_data_size < sizeof(AVClass*))        return 1;    if (!codec->p.priv_class || !codec->p.priv_class->option)        return 0;    for (const AVOption *opt = codec->p.priv_class->option; opt->name; opt++) {        if (opt->offset >= codec->priv_data_size ||            opt->type == AV_OPT_TYPE_CONST && opt->offset != 0 ||            opt->type != AV_OPT_TYPE_CONST && (opt->offset < sizeof(AVClass*) || opt->offset < 0)) {            AV_LOG("Option %s offset %d nonsensical\n",                   opt->name, opt->offset);            return 1;        }    }    return 0;} int main(void){    void *iter = NULL;    const AVCodec *codec = NULL;    int ret = 0;     while (codec = av_codec_iterate(&iter)) {        const FFCodec *const codec2 = ffcodec(codec);        const AVCodecDescriptor *desc;        int is_decoder = 0, is_encoder = 0;         if (!codec->name) {            AV_LOG("Codec for format %s has no name\n",                   avcodec_get_name(codec->id));            ret = 1;            continue;        }        if (codec->type != AVMEDIA_TYPE_VIDEO &&            codec->type != AVMEDIA_TYPE_AUDIO &&            codec->type != AVMEDIA_TYPE_SUBTITLE)            ERR_EXT("Codec %s has unsupported type %s\n",                    get_type_string(codec->type));        if (codec->type != AVMEDIA_TYPE_AUDIO) {            if (codec->ch_layouts || codec->sample_fmts ||                codec->supported_samplerates)                ERR("Non-audio codec %s has audio-only fields set\n");            if (codec->capabilities & (AV_CODEC_CAP_SMALL_LAST_FRAME |                                       AV_CODEC_CAP_CHANNEL_CONF     |                                       AV_CODEC_CAP_VARIABLE_FRAME_SIZE))                ERR("Non-audio codec %s has audio-only capabilities set\n");        }        if (codec->type != AVMEDIA_TYPE_VIDEO) {            if (codec->pix_fmts || codec->supported_framerates)                ERR("Non-video codec %s has video-only fields set\n");            if (codec2->caps_internal & FF_CODEC_CAP_EXPORTS_CROPPING)                ERR("Non-video codec %s exports cropping\n");        }        if (codec2->caps_internal  & FF_CODEC_CAP_SLICE_THREAD_HAS_MF &&            !(codec->capabilities & AV_CODEC_CAP_SLICE_THREADS))            ERR("Codec %s wants mainfunction despite not being "                "slice-threading capable");        if (codec2->caps_internal  & FF_CODEC_CAP_AUTO_THREADS &&            !(codec->capabilities & (AV_CODEC_CAP_FRAME_THREADS |                                     AV_CODEC_CAP_SLICE_THREADS |                                     AV_CODEC_CAP_OTHER_THREADS)))            ERR("Codec %s has private-only threading support\n");         switch (codec2->cb_type) {        case FF_CODEC_CB_TYPE_DECODE:        case FF_CODEC_CB_TYPE_DECODE_SUB:        case FF_CODEC_CB_TYPE_RECEIVE_FRAME:            is_decoder = 1;            break;        case FF_CODEC_CB_TYPE_ENCODE:        case FF_CODEC_CB_TYPE_ENCODE_SUB:        case FF_CODEC_CB_TYPE_RECEIVE_PACKET:            is_encoder = 1;            break;        default:            ERR("Codec %s has unknown cb_type\n");            continue;        }        if (is_decoder != av_codec_is_decoder(codec) ||            is_encoder != av_codec_is_encoder(codec)) {            ERR("Codec %s cb_type and av_codec_is_(de|en)coder inconsistent.\n");            continue;        }#define CHECK(TYPE, type) (codec2->cb_type == FF_CODEC_CB_TYPE_ ## TYPE && !codec2->cb.type)        if (CHECK(DECODE, decode) || CHECK(DECODE_SUB, decode_sub) ||            CHECK(RECEIVE_PACKET, receive_packet) ||            CHECK(ENCODE, encode) || CHECK(ENCODE_SUB, encode_sub) ||            CHECK(RECEIVE_FRAME, receive_frame)) {            ERR_EXT("Codec %s does not implement its %s callback.\n",                    is_decoder ? "decoding" : "encoding");        }#undef CHECK        if (is_encoder) {            if ((codec->type == AVMEDIA_TYPE_SUBTITLE) != (codec2->cb_type == FF_CODEC_CB_TYPE_ENCODE_SUB))                ERR("Encoder %s is both subtitle encoder and not subtitle encoder.");            if (codec2->update_thread_context || codec2->update_thread_context_for_user || codec2->bsfs)                ERR("Encoder %s has decoder-only thread functions or bsf.\n");            if (codec->type == AVMEDIA_TYPE_AUDIO) {                if (!codec->sample_fmts) {                    av_log(NULL, AV_LOG_FATAL, "Encoder %s is missing the sample_fmts field\n", codec->name);                    ret = 1;                }            }            if (codec2->caps_internal & (FF_CODEC_CAP_ALLOCATE_PROGRESS |                                        FF_CODEC_CAP_SETS_PKT_DTS |                                        FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM |                                        FF_CODEC_CAP_EXPORTS_CROPPING |                                        FF_CODEC_CAP_SETS_FRAME_PROPS) ||                codec->capabilities  & (AV_CODEC_CAP_AVOID_PROBING |                                        AV_CODEC_CAP_CHANNEL_CONF  |                                        AV_CODEC_CAP_DRAW_HORIZ_BAND |                                        AV_CODEC_CAP_SUBFRAMES))                ERR("Encoder %s has decoder-only capabilities set\n");            if (codec->capabilities & AV_CODEC_CAP_FRAME_THREADS &&                codec->capabilities & AV_CODEC_CAP_ENCODER_FLUSH)                ERR("Frame-threaded encoder %s claims to support flushing\n");        } else {            if ((codec->type == AVMEDIA_TYPE_SUBTITLE) != (codec2->cb_type == FF_CODEC_CB_TYPE_DECODE_SUB))                ERR("Subtitle decoder %s does not implement decode_sub callback\n");            if (codec->type == AVMEDIA_TYPE_SUBTITLE && codec2->bsfs)                ERR("Automatic bitstream filtering unsupported for subtitles; "                    "yet decoder %s has it set\n");            if (codec->capabilities & (AV_CODEC_CAP_SMALL_LAST_FRAME    |                                       AV_CODEC_CAP_VARIABLE_FRAME_SIZE |                                       AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE |                                       AV_CODEC_CAP_ENCODER_FLUSH))                ERR("Decoder %s has encoder-only capabilities\n");            if (codec2->caps_internal & FF_CODEC_CAP_ALLOCATE_PROGRESS &&                !(codec->capabilities & AV_CODEC_CAP_FRAME_THREADS))                ERR("Decoder %s wants allocated progress without supporting"                    "frame threads\n");        }        if (priv_data_size_wrong(codec2))            ERR_EXT("Private context of codec %s is impossibly-sized (size %d).",                    codec2->priv_data_size);        if (!(desc = avcodec_descriptor_get(codec->id))) {            ERR("Codec %s lacks a corresponding descriptor\n");        } else if (desc->type != codec->type)            ERR_EXT("The type of AVCodec %s and its AVCodecDescriptor differ: "                    "%s vs %s\n",                    get_type_string(codec->type), get_type_string(desc->type));    }    return ret;}