This is optional, but ensures that linking with -Wl,--as-needed does not
drop the library containing the MMAL VC driver. The driver normally
"registers" itself in the library constructor, but since no symbols are
explicitly referenced, the linker could remove it with as-needed
enabled.
---
At first I didn't think this was possible without hacks, but it turns
out this API is actually considered public API.
---
libavcodec/mmaldec.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/libavcodec/mmaldec.c b/libavcodec/mmaldec.c
index 1f29d2b..76d26bc 100644
--- a/libavcodec/mmaldec.c
+++ b/libavcodec/mmaldec.c
@@ -29,6 +29,7 @@
#include <interface/mmal/util/mmal_util.h>
#include <interface/mmal/util/mmal_util_params.h>
#include <interface/mmal/util/mmal_default_components.h>
+#include <interface/mmal/vc/mmal_vc_api.h>
#include "avcodec.h"
#include "internal.h"
@@ -182,6 +183,8 @@ static av_cold int ffmmal_close_decoder(AVCodecContext
*avctx)
if (ctx->bsfc)
av_bitstream_filter_close(ctx->bsfc);
+ mmal_vc_deinit();
+
return 0;
}
@@ -321,6 +324,11 @@ static av_cold int ffmmal_init_decoder(AVCodecContext
*avctx)
bcm_host_init();
+ if (mmal_vc_init()) {
+ av_log(avctx, AV_LOG_ERROR, "Cannot initialize MMAL VC driver!\n");
+ return AVERROR(ENOSYS);
+ }
+
if ((ret = ff_get_format(avctx, avctx->codec->pix_fmts)) < 0)
return ret;
--
2.1.4
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