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DShow: use data from probe for help

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This commit is contained in:
Martin Pulec
2022-10-19 13:58:14 +02:00
parent 48537db09f
commit c171ef448e
1 changed files with 20 additions and 115 deletions
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135
src/video_capture/DirectShowGrabber.cpp
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@@ -16,6 +16,7 @@
#include "lib_common.h"
#include "tv.h"
#include "utils/color_out.h"
#include "utils/macros.h"
#include "video.h"
#include "video_capture.h"
@@ -38,6 +39,7 @@ static void DeleteMediaType(AM_MEDIA_TYPE *mediaType);
static const CHAR * GetSubtypeName(const GUID *pSubtype);
static codec_t get_ug_codec(const GUID *pSubtype);
static codec_t get_ug_from_subtype_name(const char *subtype_name);
static struct vidcap_type * vidcap_dshow_probe(bool verbose, void (**deleter)(void *));
static void ErrorDescription(HRESULT hr)
{
@@ -359,132 +361,34 @@ static void show_help(struct vidcap_dshow_state *s) {
printf("\tor\n");
col() << SBOLD(SRED("\t-t dshow:[Device]<DeviceNumber>:<codec>:<width>:<height>:<fps>")) "\n\n";
bool show_legend = false;
if (!common_init(s)) return;
HRESULT res;
int n = 0;
color_printf("Devices:\n");
void (*deleter)(void *) = NULL;
struct vidcap_type *vt = vidcap_dshow_probe(true, &deleter);
// Enumerate all capture devices
while ((res = s->videoInputEnumerator->Next(1, &s->moniker, NULL)) == S_OK) {
n++;
// Attach structure for reading basic device properties
IPropertyBag *properties;
res = s->moniker->BindToStorage(0, 0, IID_PPV_ARGS(&properties));
if (res != S_OK) {
log_msg(LOG_LEVEL_ERROR, MOD_NAME "vidcap_dshow_help: Failed to read device properties.\n");
// Ignore the device
continue;
}
// Read name of the device
VARIANT var;
VariantInit(&var);
res = properties->Read(L"FriendlyName", &var, NULL);
if (res != S_OK) {
log_msg(LOG_LEVEL_ERROR, MOD_NAME "vidcap_dshow_help: Failed to read device properties.\n");
VariantClear(&var);
// Ignore the device
continue;
}
color_printf("Device %d: " TERM_BOLD "%ls\n" TERM_RESET, n, var.bstrVal);
// clean up structures
VariantClear(&var);
properties->Release();
// bind the selected device to the capture filter
IBaseFilter *captureFilter;
res = s->moniker->BindToObject(NULL, NULL, IID_IBaseFilter, (void **) &captureFilter);
if (res != S_OK) {
log_msg(LOG_LEVEL_ERROR, MOD_NAME "vidcap_dshow_help: Cannot bind capture filter to device.\n");
ErrorDescription(res);
continue;
}
// add the capture filter to the filter graph
res = s->filterGraph->AddFilter(captureFilter, L"Capture filter");
if (res != S_OK) {
log_msg(LOG_LEVEL_ERROR, MOD_NAME "vidcap_dshow_help: Cannot add capture filter to filter graph.\n");
continue;
}
// connect stream config interface to the capture filter
res = s->graphBuilder->FindInterface(&PIN_CATEGORY_CAPTURE, &MEDIATYPE_Video, captureFilter,
IID_IAMStreamConfig, (void **) &s->streamConfig);
if (res != S_OK) {
log_msg(LOG_LEVEL_ERROR, MOD_NAME "vidcap_dshow_help: Cannot find interface for reading capture capabilites.\n");
continue;
}
int capCount, capSize;
// read number of capture device capabilities
res = s->streamConfig->GetNumberOfCapabilities(&capCount, &capSize);
if (res != S_OK) {
log_msg(LOG_LEVEL_ERROR, MOD_NAME "vidcap_dshow_help: Cannot read number of capture capabilites.\n");
continue;
}
// check if the format of capture capabilities is the right one
if (capSize != sizeof(VIDEO_STREAM_CONFIG_CAPS)) {
log_msg(LOG_LEVEL_ERROR, MOD_NAME "vidcap_dshow_help: Unknown format of capture capabilites.\n");
continue;
}
for (int n = 0; n < vt->card_count; ++n) {
color_printf("Device %d) " TERM_BOLD "%s\n" TERM_RESET, n, vt->cards[n].name);
int i = 0;
// iterate over all capabilities
for (int i = 0; i < capCount; i++) {
AM_MEDIA_TYPE *mediaType;
VIDEO_STREAM_CONFIG_CAPS streamCaps;
res = s->streamConfig->GetStreamCaps(i, &mediaType, (BYTE*) &streamCaps);
if (res != S_OK) {
log_msg(LOG_LEVEL_ERROR, MOD_NAME "vidcap_dshow_help: Cannot read stream capabilities #%d.\n", i);
continue;
}
if (mediaType->formattype != FORMAT_VideoInfo && mediaType->formattype != FORMAT_VideoInfo2) {
log_msg(LOG_LEVEL_ERROR, MOD_NAME "vidcap_dshow_help: Unsupported format type for capability #%d.\n", i);
continue;
}
struct video_desc desc = vidcap_dshow_get_video_desc(mediaType);
if (desc.width == 0) {
continue;
}
printf(" Mode %2d: %s %ux%u @%0.2lf%s %s%s", i, GetSubtypeName(&mediaType->subtype),
desc.width, desc.height,
desc.fps * (desc.interlacing == INTERLACED_MERGED ? 2 : 1),
get_interlacing_suffix(desc.interlacing),
desc.color_spec ? "" : "C",
mediaType->formattype == FORMAT_VideoInfo ? "" : "F");
if (!desc.color_spec || mediaType->formattype != FORMAT_VideoInfo) {
show_legend = true;
}
DeleteMediaType(mediaType);
while (strlen(vt->cards[n].modes[i].id) > 0) {
printf(" Mode %2d: %s", i, vt->cards[n].modes[i].name);
putchar(i % 2 == 1 ? '\n' : '\t');
++i;
}
s->streamConfig->Release();
res = s ->filterGraph->RemoveFilter(captureFilter);
if (res != S_OK) {
log_msg(LOG_LEVEL_ERROR, MOD_NAME "vidcap_dshow_help: Cannot remove capture filter from filter graph.\n");
continue;
}
captureFilter->Release();
s->moniker->Release();
printf("\n\n");
}
deleter = IF_NOT_NULL_ELSE(deleter, (void (*)(void *)) free);
deleter(vt->cards);
deleter(vt);
if (show_legend) {
printf("C - codec is not supported in UG; F - video format is not supported\n\n");
}
printf("Mode flags:\n");
printf("C - codec is not supported in UG; F - video format is not supported\n\n");
}
/**
* @todo
* The code is mostly copy&paste from show_help() - put it together.
*/
static struct vidcap_type * vidcap_dshow_probe(bool verbose, void (**deleter)(void *))
{
struct vidcap_type* vt;
@@ -602,9 +506,10 @@ static struct vidcap_type * vidcap_dshow_probe(bool verbose, void (**deleter)(vo
"{\"mode\":\"%d\"}", i);
snprintf(vt->cards[vt->card_count - 1].modes[i].name,
sizeof vt->cards[vt->card_count - 1].modes[i].name,
"%s %ux%u @%0.2lf%s%s", GetSubtypeName(&mediaType->subtype),
"%s %ux%u @%0.2lf%s %s%s", GetSubtypeName(&mediaType->subtype),
desc.width, desc.height, desc.fps * (desc.interlacing == INTERLACED_MERGED ? 2 : 1), get_interlacing_suffix(desc.interlacing),
desc.color_spec ? "" : " (U)");
desc.color_spec ? "" : "C",
mediaType->formattype == FORMAT_VideoInfo ? "" : "F");
DeleteMediaType(mediaType);
}