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https://github.com/FFmpeg/FFmpeg.git
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4243da4ff4
This is possible, because every given FFCodec has to implement exactly one of these. Doing so decreases sizeof(FFCodec) and therefore decreases the size of the binary. Notice that in case of position-independent code the decrease is in .data.rel.ro, so that this translates to decreased memory consumption. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
186 lines
8.6 KiB
C
186 lines
8.6 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/opt.h"
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#include "libavcodec/codec.h"
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#include "libavcodec/codec_desc.h"
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#include "libavcodec/codec_internal.h"
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#include "libavcodec/internal.h"
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static const char *get_type_string(enum AVMediaType type)
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{
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const char *ret = av_get_media_type_string(type);
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return ret ? ret : "unknown";
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}
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#define AV_LOG(...) av_log(NULL, AV_LOG_FATAL, __VA_ARGS__)
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#define ERR_INTERNAL(msg, ...) \
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do { \
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AV_LOG(msg, codec->name __VA_ARGS__); \
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ret = 1; \
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} while (0)
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#define ERR(msg) ERR_INTERNAL(msg, )
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#define ERR_EXT(msg, ...) ERR_INTERNAL(msg, , __VA_ARGS__)
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static int priv_data_size_wrong(const FFCodec *codec)
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{
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if (codec->priv_data_size < 0 ||
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codec->p.priv_class && codec->priv_data_size < sizeof(AVClass*))
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return 1;
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if (!codec->p.priv_class || !codec->p.priv_class->option)
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return 0;
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for (const AVOption *opt = codec->p.priv_class->option; opt->name; opt++) {
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if (opt->offset >= codec->priv_data_size ||
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opt->type == AV_OPT_TYPE_CONST && opt->offset != 0 ||
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opt->type != AV_OPT_TYPE_CONST && (opt->offset < sizeof(AVClass*) || opt->offset < 0)) {
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AV_LOG("Option %s offset %d nonsensical\n",
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opt->name, opt->offset);
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return 1;
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}
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}
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return 0;
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}
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int main(void){
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void *iter = NULL;
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const AVCodec *codec = NULL;
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int ret = 0;
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while (codec = av_codec_iterate(&iter)) {
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const FFCodec *const codec2 = ffcodec(codec);
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const AVCodecDescriptor *desc;
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int is_decoder = 0, is_encoder = 0;
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if (!codec->name) {
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AV_LOG("Codec for format %s has no name\n",
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avcodec_get_name(codec->id));
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ret = 1;
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continue;
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}
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if (codec->type != AVMEDIA_TYPE_VIDEO &&
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codec->type != AVMEDIA_TYPE_AUDIO &&
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codec->type != AVMEDIA_TYPE_SUBTITLE)
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ERR_EXT("Codec %s has unsupported type %s\n",
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get_type_string(codec->type));
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if (codec->type != AVMEDIA_TYPE_AUDIO) {
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if (codec->ch_layouts || codec->sample_fmts ||
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codec->supported_samplerates)
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ERR("Non-audio codec %s has audio-only fields set\n");
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if (codec->capabilities & (AV_CODEC_CAP_SMALL_LAST_FRAME |
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AV_CODEC_CAP_CHANNEL_CONF |
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AV_CODEC_CAP_VARIABLE_FRAME_SIZE))
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ERR("Non-audio codec %s has audio-only capabilities set\n");
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}
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if (codec->type != AVMEDIA_TYPE_VIDEO) {
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if (codec->pix_fmts || codec->supported_framerates)
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ERR("Non-video codec %s has video-only fields set\n");
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if (codec2->caps_internal & FF_CODEC_CAP_EXPORTS_CROPPING)
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ERR("Non-video codec %s exports cropping\n");
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}
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if (codec2->caps_internal & FF_CODEC_CAP_SLICE_THREAD_HAS_MF &&
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!(codec->capabilities & AV_CODEC_CAP_SLICE_THREADS))
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ERR("Codec %s wants mainfunction despite not being "
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"slice-threading capable");
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if (codec2->caps_internal & FF_CODEC_CAP_AUTO_THREADS &&
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!(codec->capabilities & (AV_CODEC_CAP_FRAME_THREADS |
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AV_CODEC_CAP_SLICE_THREADS |
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AV_CODEC_CAP_OTHER_THREADS)))
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ERR("Codec %s has private-only threading support\n");
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switch (codec2->cb_type) {
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case FF_CODEC_CB_TYPE_DECODE:
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case FF_CODEC_CB_TYPE_DECODE_SUB:
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case FF_CODEC_CB_TYPE_RECEIVE_FRAME:
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is_decoder = 1;
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break;
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case FF_CODEC_CB_TYPE_ENCODE:
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case FF_CODEC_CB_TYPE_ENCODE_SUB:
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case FF_CODEC_CB_TYPE_RECEIVE_PACKET:
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is_encoder = 1;
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break;
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default:
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ERR("Codec %s has unknown cb_type\n");
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continue;
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}
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if (is_decoder != av_codec_is_decoder(codec) ||
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is_encoder != av_codec_is_encoder(codec)) {
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ERR("Codec %s cb_type and av_codec_is_(de|en)coder inconsistent.\n");
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continue;
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}
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#define CHECK(TYPE, type) (codec2->cb_type == FF_CODEC_CB_TYPE_ ## TYPE && !codec2->cb.type)
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if (CHECK(DECODE, decode) || CHECK(DECODE_SUB, decode_sub) ||
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CHECK(RECEIVE_PACKET, receive_packet) ||
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CHECK(ENCODE, encode) || CHECK(ENCODE_SUB, encode_sub) ||
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CHECK(RECEIVE_FRAME, receive_frame)) {
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ERR_EXT("Codec %s does not implement its %s callback.\n",
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is_decoder ? "decoding" : "encoding");
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}
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#undef CHECK
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if (is_encoder) {
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if ((codec->type == AVMEDIA_TYPE_SUBTITLE) != (codec2->cb_type == FF_CODEC_CB_TYPE_ENCODE_SUB))
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ERR("Encoder %s is both subtitle encoder and not subtitle encoder.");
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if (codec2->update_thread_context || codec2->update_thread_context_for_user || codec2->bsfs)
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ERR("Encoder %s has decoder-only thread functions or bsf.\n");
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if (codec->type == AVMEDIA_TYPE_AUDIO) {
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if (!codec->sample_fmts) {
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av_log(NULL, AV_LOG_FATAL, "Encoder %s is missing the sample_fmts field\n", codec->name);
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ret = 1;
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}
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}
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if (codec2->caps_internal & (FF_CODEC_CAP_ALLOCATE_PROGRESS |
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FF_CODEC_CAP_SETS_PKT_DTS |
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FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM |
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FF_CODEC_CAP_EXPORTS_CROPPING |
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FF_CODEC_CAP_SETS_FRAME_PROPS) ||
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codec->capabilities & (AV_CODEC_CAP_AVOID_PROBING |
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AV_CODEC_CAP_CHANNEL_CONF |
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AV_CODEC_CAP_DRAW_HORIZ_BAND |
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AV_CODEC_CAP_SUBFRAMES))
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ERR("Encoder %s has decoder-only capabilities set\n");
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if (codec->capabilities & AV_CODEC_CAP_FRAME_THREADS &&
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codec->capabilities & AV_CODEC_CAP_ENCODER_FLUSH)
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ERR("Frame-threaded encoder %s claims to support flushing\n");
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} else {
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if ((codec->type == AVMEDIA_TYPE_SUBTITLE) != (codec2->cb_type == FF_CODEC_CB_TYPE_DECODE_SUB))
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ERR("Subtitle decoder %s does not implement decode_sub callback\n");
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if (codec->type == AVMEDIA_TYPE_SUBTITLE && codec2->bsfs)
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ERR("Automatic bitstream filtering unsupported for subtitles; "
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"yet decoder %s has it set\n");
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if (codec->capabilities & (AV_CODEC_CAP_SMALL_LAST_FRAME |
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AV_CODEC_CAP_VARIABLE_FRAME_SIZE |
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AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE |
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AV_CODEC_CAP_ENCODER_FLUSH))
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ERR("Decoder %s has encoder-only capabilities\n");
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if (codec2->caps_internal & FF_CODEC_CAP_ALLOCATE_PROGRESS &&
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!(codec->capabilities & AV_CODEC_CAP_FRAME_THREADS))
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ERR("Decoder %s wants allocated progress without supporting"
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"frame threads\n");
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}
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if (priv_data_size_wrong(codec2))
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ERR_EXT("Private context of codec %s is impossibly-sized (size %d).",
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codec2->priv_data_size);
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if (!(desc = avcodec_descriptor_get(codec->id))) {
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ERR("Codec %s lacks a corresponding descriptor\n");
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} else if (desc->type != codec->type)
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ERR_EXT("The type of AVCodec %s and its AVCodecDescriptor differ: "
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"%s vs %s\n",
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get_type_string(codec->type), get_type_string(desc->type));
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}
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return ret;
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}
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