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mfc: Check device capabilities before doing anything else

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This commit is contained in:
Sebastian Dröge 2013-01-02 14:16:06 +01:00
parent 4abcec4ce8
commit 83a8138b4a
1 changed files with 16 additions and 0 deletions
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16
sys/mfc/mfc_decoder/mfc_decoder.c
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@ -276,6 +276,7 @@ static int request_output_buffers(struct mfc_dec_context *ctx, int num)
struct mfc_dec_context* mfc_dec_create(unsigned int codec, int num_input_buffers)
{
struct mfc_dec_context *ctx;
struct v4l2_capability caps;
pthread_mutex_lock(&mutex);
if (mfc_in_use) {
@ -301,6 +302,21 @@ struct mfc_dec_context* mfc_dec_create(unsigned int codec, int num_input_buffers
free(ctx);
return NULL;
}
if (ioctl (ctx->fd, VIDIOC_QUERYCAP, &caps) < 0) {
GST_ERROR ("Unable to query capabilities: %d", errno);
mfc_dec_destroy(ctx);
return NULL;
}
if ((caps.capabilities & V4L2_CAP_STREAMING) == 0 ||
(caps.capabilities & V4L2_CAP_VIDEO_OUTPUT_MPLANE) == 0 ||
(caps.capabilities & V4L2_CAP_VIDEO_CAPTURE_MPLANE) == 0) {
GST_ERROR ("Required capabilities not available");
mfc_dec_destroy(ctx);
return NULL;
}
if (mfc_dec_set_codec(ctx, codec) ||
request_input_buffers(ctx, num_input_buffers)) {
mfc_dec_destroy(ctx);