On Tue, 2020-12-15 at 13:18 +0200, Mirela Rabulea (OSS) wrote: > From: Mirela Rabulea <[email protected]> > > These are optional in struct v4l2_jpeg_header, so skip DHT/DQT segment > parsing if huffman_tables/quantization_tables were not requested by user, > to save time. > However, do count them (num_dht/num_dqt). > > Signed-off-by: Mirela Rabulea <[email protected]> > --- > Changes in v6: > Call jpeg_skip_segment() instead of > jpeg_parse_quantization_table()/jpeg_parse_huffman_tables(), > when quantization/huffman tables are not requested by user. > Remove the NULL pointer check in the lower-level function. > Thanks Philipp & Hans for feedback > > drivers/media/v4l2-core/v4l2-jpeg.c | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/drivers/media/v4l2-core/v4l2-jpeg.c > b/drivers/media/v4l2-core/v4l2-jpeg.c > index dc9def4c2648..f3d03d39defb 100644 > --- a/drivers/media/v4l2-core/v4l2-jpeg.c > +++ b/drivers/media/v4l2-core/v4l2-jpeg.c > @@ -537,6 +537,10 @@ int v4l2_jpeg_parse_header(void *buf, size_t len, struct > v4l2_jpeg_header *out) > &out->dht[out->num_dht++ % 4]); > if (ret < 0) > return ret; > + if (!out->huffman_tables) { > + ret = jpeg_skip_segment(&stream); > + break; > + } > ret = jpeg_parse_huffman_tables(&stream, > out->huffman_tables); > break; > @@ -545,6 +549,10 @@ int v4l2_jpeg_parse_header(void *buf, size_t len, struct > v4l2_jpeg_header *out) > &out->dqt[out->num_dqt++ % 4]); > if (ret < 0) > return ret; > + if (!out->quantization_tables) { > + ret = jpeg_skip_segment(&stream); > + break; > + } > ret = jpeg_parse_quantization_tables(&stream, > out->frame.precision, > out->quantization_tables);
Reviewed-by: Philipp Zabel <[email protected]> regards Philipp
