This kind of hwaccel does not require cooperation from the software
decoder at all. Initialize it as soon as the decoder is opened.
---
avconv.c | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
diff --git a/avconv.c b/avconv.c
index 7dd335e..5532eac 100644
--- a/avconv.c
+++ b/avconv.c
@@ -1530,6 +1530,17 @@ static int get_buffer(AVCodecContext *s, AVFrame *frame,
int flags)
return avcodec_default_get_buffer2(s, frame, flags);
}
+static const HWAccel *get_full_hwaccel(int hwaccel_id)
+{
+ int i;
+ for (i = 0; hwaccels[i].name; i++)
+ if (hwaccels[i].id == hwaccel_id &&
+ hwaccels[i].pix_fmt == AV_PIX_FMT_NONE)
+ return &hwaccels[i];
+
+ return NULL;
+}
+
static int init_input_stream(int ist_index, char *error, int error_len)
{
int i, ret;
@@ -1574,6 +1585,24 @@ static int init_input_stream(int ist_index, char *error,
int error_len)
ist->file_index, ist->st->index, errbuf);
return ret;
}
+
+ if (ist->hwaccel_id) {
+ const HWAccel *hwaccel = get_full_hwaccel(ist->hwaccel_id);
+ if (hwaccel) {
+ if ((ret = hwaccel->init(ist->dec_ctx)) < 0) {
+ char errbuf[128];
+
+ av_strerror(ret, errbuf, sizeof(errbuf));
+
+ av_log(NULL, AV_LOG_WARNING,
+ "The hardware acceleration backend %s "
+ "cannot be used: %s.",
+ hwaccel->name, errbuf);
+ av_log(NULL, AV_LOG_WARNING,
+ "Falling back to software decoding.");
+ }
+ }
+ }
assert_avoptions(ist->decoder_opts);
}
--
2.1.0
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