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Code Issues Releases Activity

avdevice/decklink_commmon: enhance error messages when iterator creation fails

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Show a more useful error message which specifies the required driver version
for the build, and use the correct context in the error message for WIN32.

Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Marton Balint 2018-04-15 00:06:59 +02:00
parent 3027056160
commit 768c0774d8
1 changed files with 14 additions and 14 deletions
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28
libavdevice/decklink_common.cpp
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@ -53,25 +53,29 @@ extern "C" {
#include "decklink_common.h"
#ifdef _WIN32
IDeckLinkIterator *CreateDeckLinkIteratorInstance(void)
static IDeckLinkIterator *decklink_create_iterator(AVFormatContext *avctx)
{
IDeckLinkIterator *iter;
#ifdef _WIN32
if (CoInitialize(NULL) < 0) {
av_log(NULL, AV_LOG_ERROR, "COM initialization failed.\n");
av_log(avctx, AV_LOG_ERROR, "COM initialization failed.\n");
return NULL;
}
if (CoCreateInstance(CLSID_CDeckLinkIterator, NULL, CLSCTX_ALL,
IID_IDeckLinkIterator, (void**) &iter) != S_OK) {
av_log(NULL, AV_LOG_ERROR, "DeckLink drivers not installed.\n");
return NULL;
iter = NULL;
}
#else
iter = CreateDeckLinkIteratorInstance();
#endif
if (!iter)
av_log(avctx, AV_LOG_ERROR, "Could not create DeckLink iterator. "
"Make sure you have DeckLink drivers " BLACKMAGIC_DECKLINK_API_VERSION_STRING " or newer installed.\n");
return iter;
}
#endif
#ifdef _WIN32
static char *dup_wchar_to_utf8(wchar_t *w)
@ -285,13 +289,11 @@ int ff_decklink_list_devices(AVFormatContext *avctx,
int show_inputs, int show_outputs)
{
IDeckLink *dl = NULL;
IDeckLinkIterator *iter = CreateDeckLinkIteratorInstance();
IDeckLinkIterator *iter = decklink_create_iterator(avctx);
int ret = 0;
if (!iter) {
av_log(avctx, AV_LOG_ERROR, "Could not create DeckLink iterator\n");
if (!iter)
return AVERROR(EIO);
}
while (ret == 0 && iter->Next(&dl) == S_OK) {
IDeckLinkOutput *output_config;
@ -442,11 +444,9 @@ int ff_decklink_init_device(AVFormatContext *avctx, const char* name)
struct decklink_cctx *cctx = (struct decklink_cctx *)avctx->priv_data;
struct decklink_ctx *ctx = (struct decklink_ctx *)cctx->ctx;
IDeckLink *dl = NULL;
IDeckLinkIterator *iter = CreateDeckLinkIteratorInstance();
if (!iter) {
av_log(avctx, AV_LOG_ERROR, "Could not create DeckLink iterator\n");
IDeckLinkIterator *iter = decklink_create_iterator(avctx);
if (!iter)
return AVERROR_EXTERNAL;
}
while (iter->Next(&dl) == S_OK) {
const char *displayName;