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cmdutils: refactor -codecs option.
Make it print a list of AVCodecDescriptors. Add new -decoders and -encoders options that print lists of decoders and encoders respectively.
This commit is contained in:
Anton Khirnov
174
cmdutils.c
174
cmdutils.c
@@ -632,81 +632,123 @@ void show_formats(void)
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}
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}
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static char get_media_type_char(enum AVMediaType type)
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{
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switch (type) {
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case AVMEDIA_TYPE_VIDEO: return 'V';
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case AVMEDIA_TYPE_AUDIO: return 'A';
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case AVMEDIA_TYPE_SUBTITLE: return 'S';
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default: return '?';
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}
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}
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static const AVCodec *next_codec_for_id(enum AVCodecID id, const AVCodec *prev,
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int encoder)
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{
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while ((prev = av_codec_next(prev))) {
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if (prev->id == id &&
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(encoder ? av_codec_is_encoder(prev) : av_codec_is_decoder(prev)))
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return prev;
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}
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return NULL;
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}
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static void print_codecs_for_id(enum AVCodecID id, int encoder)
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{
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const AVCodec *codec = NULL;
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printf(" (%s: ", encoder ? "encoders" : "decoders");
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while ((codec = next_codec_for_id(id, codec, encoder)))
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printf("%s ", codec->name);
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printf(")");
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}
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void show_codecs(void)
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{
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AVCodec *p = NULL, *p2;
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const char *last_name;
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const AVCodecDescriptor *desc = NULL;
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printf("Codecs:\n"
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" D..... = Decoding supported\n"
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" .E.... = Encoding supported\n"
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" ..V... = Video codec\n"
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" ..A... = Audio codec\n"
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" ..S... = Subtitle codec\n"
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" ...S.. = Supports draw_horiz_band\n"
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" ....D. = Supports direct rendering method 1\n"
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" .....T = Supports weird frame truncation\n"
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" ------\n");
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last_name= "000";
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for (;;) {
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int decode = 0;
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int encode = 0;
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int cap = 0;
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const char *type_str;
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" D... = Decoding supported\n"
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" .E.. = Encoding supported\n"
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" ..V. = Video codec\n"
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" ..A. = Audio codec\n"
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" ..S. = Subtitle codec\n"
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" ...I = Intra frame-only codec\n"
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" -----\n");
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while ((desc = avcodec_descriptor_next(desc))) {
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const AVCodec *codec = NULL;
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p2 = NULL;
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while ((p = av_codec_next(p))) {
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if ((p2 == NULL || strcmp(p->name, p2->name) < 0) &&
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strcmp(p->name, last_name) > 0) {
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p2 = p;
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decode = encode = cap = 0;
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}
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if (p2 && strcmp(p->name, p2->name) == 0) {
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if (av_codec_is_decoder(p))
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decode = 1;
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if (av_codec_is_encoder(p))
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encode = 1;
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cap |= p->capabilities;
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printf(avcodec_find_decoder(desc->id) ? "D" : ".");
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printf(avcodec_find_encoder(desc->id) ? "E" : ".");
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printf("%c", get_media_type_char(desc->type));
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printf((desc->props & AV_CODEC_PROP_INTRA_ONLY) ? "I" : ".");
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printf(" %-20s %s", desc->name, desc->long_name ? desc->long_name : "");
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/* print decoders/encoders when there's more than one or their
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* names are different from codec name */
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while ((codec = next_codec_for_id(desc->id, codec, 0))) {
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if (strcmp(codec->name, desc->name)) {
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print_codecs_for_id(desc->id, 0);
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break;
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}
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}
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if (p2 == NULL)
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break;
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last_name = p2->name;
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switch (p2->type) {
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case AVMEDIA_TYPE_VIDEO:
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type_str = "V";
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break;
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case AVMEDIA_TYPE_AUDIO:
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type_str = "A";
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break;
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case AVMEDIA_TYPE_SUBTITLE:
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type_str = "S";
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break;
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default:
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type_str = "?";
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break;
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codec = NULL;
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while ((codec = next_codec_for_id(desc->id, codec, 1))) {
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if (strcmp(codec->name, desc->name)) {
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print_codecs_for_id(desc->id, 1);
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break;
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}
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}
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printf(" %s%s%s%s%s%s %-15s %s",
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decode ? "D" : (/* p2->decoder ? "d" : */ " "),
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encode ? "E" : " ",
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type_str,
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cap & CODEC_CAP_DRAW_HORIZ_BAND ? "S" : " ",
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cap & CODEC_CAP_DR1 ? "D" : " ",
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cap & CODEC_CAP_TRUNCATED ? "T" : " ",
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p2->name,
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p2->long_name ? p2->long_name : "");
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#if 0
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if (p2->decoder && decode == 0)
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printf(" use %s for decoding", p2->decoder->name);
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#endif
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printf("\n");
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}
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printf("\n");
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printf("Note, the names of encoders and decoders do not always match, so there are\n"
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"several cases where the above table shows encoder only or decoder only entries\n"
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"even though both encoding and decoding are supported. For example, the h263\n"
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"decoder corresponds to the h263 and h263p encoders, for file formats it is even\n"
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"worse.\n");
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}
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static void print_codecs(int encoder)
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{
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const AVCodecDescriptor *desc = NULL;
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printf("%s:\n"
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" V... = Video\n"
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" A... = Audio\n"
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" S... = Subtitle\n"
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" .F.. = Frame-level multithreading\n"
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" ..S. = Slice-level multithreading\n"
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" ...X = Codec is experimental\n"
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" ---\n",
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encoder ? "Encoders" : "Decoders");
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while ((desc = avcodec_descriptor_next(desc))) {
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const AVCodec *codec = NULL;
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while ((codec = next_codec_for_id(desc->id, codec, encoder))) {
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printf("%c", get_media_type_char(desc->type));
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printf((codec->capabilities & CODEC_CAP_FRAME_THREADS) ? "F" : ".");
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printf((codec->capabilities & CODEC_CAP_SLICE_THREADS) ? "S" : ".");
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printf((codec->capabilities & CODEC_CAP_EXPERIMENTAL) ? "X" : ".");
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printf(" %-20s %s", codec->name, codec->long_name ? codec->long_name : "");
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if (strcmp(codec->name, desc->name))
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printf(" (codec %s)", desc->name);
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printf("\n");
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}
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}
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}
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int show_decoders(const char *opt, const char *arg)
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{
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print_codecs(0);
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return 0;
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}
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int show_encoders(const char *opt, const char *arg)
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{
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print_codecs(1);
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return 0;
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}
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void show_bsfs(void)
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12
cmdutils.h
12
cmdutils.h
@@ -278,6 +278,18 @@ void show_formats(void);
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*/
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void show_codecs(void);
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/**
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* Print a listing containing all the decoders supported by the
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* program.
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*/
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int show_decoders(const char *opt, const char *arg);
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/**
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* Print a listing containing all the encoders supported by the
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* program.
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*/
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int show_encoders(const char *opt, const char *arg);
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/**
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* Print a listing containing all the filters supported by the
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* program.
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@@ -6,6 +6,8 @@
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{ "version", OPT_EXIT, {(void*)show_version}, "show version" },
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{ "formats" , OPT_EXIT, {(void*)show_formats }, "show available formats" },
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{ "codecs" , OPT_EXIT, {(void*)show_codecs }, "show available codecs" },
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{ "decoders" , OPT_EXIT, {(void*)show_decoders }, "show available decoders" },
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{ "encoders" , OPT_EXIT, {(void*)show_encoders }, "show available encoders" },
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{ "bsfs" , OPT_EXIT, {(void*)show_bsfs }, "show available bit stream filters" },
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{ "protocols", OPT_EXIT, {(void*)show_protocols}, "show available protocols" },
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{ "filters", OPT_EXIT, {(void*)show_filters }, "show available filters" },
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@@ -69,23 +69,16 @@ Encoding available
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@end table
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@item -codecs
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Show available codecs.
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Show all codecs known to libavcodec.
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The fields preceding the codec names have the following meanings:
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@table @samp
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@item D
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Decoding available
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@item E
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Encoding available
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@item V/A/S
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Video/audio/subtitle codec
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@item S
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Codec supports slices
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@item D
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Codec supports direct rendering
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@item T
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Codec can handle input truncated at random locations instead of only at frame boundaries
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@end table
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Note that the term 'codec' is used throughout this documentation as a shortcut
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for what is more correctly called a media bitstream format.
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@item -decoders
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Show available decoders.
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@item -encoders
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Show all available encoders.
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@item -bsfs
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Show available bitstream filters.
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