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cmdutils: extend -h to allow printing codec details.

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This commit is contained in:
Anton Khirnov 2012-08-13 20:06:25 +02:00
parent 7c5012127f
commit a3ad68d36c
9 changed files with 172 additions and 32 deletions
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120
cmdutils.c
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@ -132,7 +132,7 @@ void show_help_options(const OptionDef *options, const char *msg, int req_flags,
first = 0;
}
av_strlcpy(buf, po->name, sizeof(buf));
if (po->flags & HAS_ARG) {
if (po->argname) {
av_strlcat(buf, " ", sizeof(buf));
av_strlcat(buf, po->argname, sizeof(buf));
}
@ -642,6 +642,65 @@ int show_formats(const char *opt, const char *arg)
return 0;
}
#define PRINT_CODEC_SUPPORTED(codec, field, type, list_name, term, get_name) \
if (codec->field) { \
const type *p = c->field; \
\
printf(" Supported " list_name ":"); \
while (*p != term) { \
get_name(*p); \
printf(" %s", name); \
p++; \
} \
printf("\n"); \
} \
static void print_codec(const AVCodec *c)
{
int encoder = av_codec_is_encoder(c);
printf("%s %s [%s]:\n", encoder ? "Encoder" : "Decoder", c->name,
c->long_name ? c->long_name : "");
if (c->type == AVMEDIA_TYPE_VIDEO) {
printf(" Threading capabilities: ");
switch (c->capabilities & (CODEC_CAP_FRAME_THREADS |
CODEC_CAP_SLICE_THREADS)) {
case CODEC_CAP_FRAME_THREADS |
CODEC_CAP_SLICE_THREADS: printf("frame and slice"); break;
case CODEC_CAP_FRAME_THREADS: printf("frame"); break;
case CODEC_CAP_SLICE_THREADS: printf("slice"); break;
default: printf("no"); break;
}
printf("\n");
}
if (c->supported_framerates) {
const AVRational *fps = c->supported_framerates;
printf(" Supported framerates:");
while (fps->num) {
printf(" %d/%d", fps->num, fps->den);
fps++;
}
printf("\n");
}
PRINT_CODEC_SUPPORTED(c, pix_fmts, enum PixelFormat, "pixel formats",
PIX_FMT_NONE, GET_PIX_FMT_NAME);
PRINT_CODEC_SUPPORTED(c, supported_samplerates, int, "sample rates", 0,
GET_SAMPLE_RATE_NAME);
PRINT_CODEC_SUPPORTED(c, sample_fmts, enum AVSampleFormat, "sample formats",
AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME);
PRINT_CODEC_SUPPORTED(c, channel_layouts, uint64_t, "channel layouts",
0, GET_CH_LAYOUT_DESC);
if (c->priv_class) {
show_help_children(c->priv_class,
AV_OPT_FLAG_ENCODING_PARAM |
AV_OPT_FLAG_DECODING_PARAM);
}
}
static char get_media_type_char(enum AVMediaType type)
{
switch (type) {
@ -842,6 +901,65 @@ int show_sample_fmts(const char *opt, const char *arg)
return 0;
}
static void show_help_codec(const char *name, int encoder)
{
const AVCodecDescriptor *desc;
const AVCodec *codec;
if (!name) {
av_log(NULL, AV_LOG_ERROR, "No codec name specified.\n");
return;
}
codec = encoder ? avcodec_find_encoder_by_name(name) :
avcodec_find_decoder_by_name(name);
if (codec)
print_codec(codec);
else if ((desc = avcodec_descriptor_get_by_name(name))) {
int printed = 0;
while ((codec = next_codec_for_id(desc->id, codec, encoder))) {
printed = 1;
print_codec(codec);
}
if (!printed) {
av_log(NULL, AV_LOG_ERROR, "Codec '%s' is known to Libav, "
"but no %s for it are available. Libav might need to be "
"recompiled with additional external libraries.\n",
name, encoder ? "encoders" : "decoders");
}
} else {
av_log(NULL, AV_LOG_ERROR, "Codec '%s' is not recognized by Libav.\n",
name);
}
}
int show_help(const char *opt, const char *arg)
{
char *topic, *par;
av_log_set_callback(log_callback_help);
topic = av_strdup(arg ? arg : "");
par = strchr(topic, '=');
if (par)
*par++ = 0;
if (!*topic) {
show_help_default(topic, par);
} else if (!strcmp(topic, "decoder")) {
show_help_codec(par, 0);
} else if (!strcmp(topic, "encoder")) {
show_help_codec(par, 1);
} else {
show_help_default(topic, par);
}
av_freep(&topic);
return 0;
}
int read_yesno(void)
{
int c = getchar();