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jpegdec: Fix decoding of streams that don't signal exactly twice the height

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... and also progressive streams.
This commit is contained in:
Sebastian Dröge 2017-09-05 15:42:17 +03:00
parent 09ee89f4c4
commit aae7fcc0b5
1 changed files with 10 additions and 2 deletions
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12
ext/jpeg/gstjpegdec.c
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@ -1220,12 +1220,13 @@ gst_jpeg_dec_handle_frame (GstVideoDecoder * bdec, GstVideoCodecFrame * frame)
/* is it interlaced MJPEG? (we really don't want to scan the jpeg data
* to see if there are two SOF markers in the packet to detect this) */
if (gst_video_decoder_get_packetized (bdec) &&
dec->input_state->info.height > height &&
dec->input_state->info.height <= (height * 2)
&& dec->input_state->info.width == width) {
GST_LOG_OBJECT (dec,
"looks like an interlaced image: "
"input width/height of %dx%d with JPEG frame width/height of %dx%d",
dec->input_state->info.height, dec->input_state->info.width, width,
dec->input_state->info.width, dec->input_state->info.height, width,
height);
output_height = dec->input_state->info.height;
height = dec->input_state->info.height / 2;
@ -1301,8 +1302,15 @@ gst_jpeg_dec_handle_frame (GstVideoDecoder * bdec, GstVideoCodecFrame * frame)
break;
}
GST_LOG_OBJECT (dec,
"got for second field of interlaced image: "
"input width/height of %dx%d with JPEG frame width/height of %dx%d",
dec->input_state->info.width, dec->input_state->info.height,
dec->cinfo.output_width, dec->cinfo.output_height);
if (dec->cinfo.output_width != GST_VIDEO_INFO_WIDTH (&state->info) ||
dec->cinfo.output_height * 2 > GST_VIDEO_INFO_HEIGHT (&state->info) ||
GST_VIDEO_INFO_HEIGHT (&state->info) <= dec->cinfo.output_height ||
GST_VIDEO_INFO_HEIGHT (&state->info) > (dec->cinfo.output_height * 2) ||
field2_format != GST_VIDEO_INFO_FORMAT (&state->info)) {
GST_WARNING_OBJECT (dec, "second field has different format than first");
gst_video_frame_unmap (&vframe);