/*
* 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/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 AVCodec *codec)
{
if (codec->priv_data_size < 0 ||
codec->priv_class && codec->priv_data_size < sizeof(AVClass*))
return 1;
if (!codec->priv_class || !codec->priv_class->option)
return 0;
for (const AVOption *opt = codec->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 AVCodecDescriptor *desc;
int is_decoder, is_encoder;
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->channel_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 (codec->caps_internal & FF_CODEC_CAP_EXPORTS_CROPPING)
ERR("Non-video codec %s exports cropping\n");
}
if (codec->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 (codec->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");
is_decoder = av_codec_is_decoder(codec);
is_encoder = av_codec_is_encoder(codec);
if (!!is_decoder + !!is_encoder != 1) {
ERR("Codec %s is decoder and encoder or neither.\n");
continue;
}
if (is_encoder) {
if (codec->type == AVMEDIA_TYPE_SUBTITLE ^ !!codec->encode_sub)
ERR("Encoder %s is both subtitle encoder and not subtitle encoder.");
if (!!codec->encode_sub + !!codec->encode2 + !!codec->receive_packet != 1)
ERR("Encoder %s does not implement exactly one encode API.\n");
if (codec->update_thread_context || codec->update_thread_context_for_user || codec->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 (codec->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 && !codec->decode)
ERR("Subtitle decoder %s does not implement decode callback\n");
if (codec->type == AVMEDIA_TYPE_SUBTITLE && codec->bsfs)
ERR("Automatic bitstream filtering unsupported for subtitles; "
"yet decoder %s has it set\n");
if (!!codec->decode + !!codec->receive_frame != 1)
ERR("Decoder %s does not implement exactly one decode API.\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 (codec->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(codec))
ERR_EXT("Private context of codec %s is impossibly-sized (size %d).",
codec->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;
}