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theora: Don't always round to even width/height
Previously, the code always rounded to even sizes. Now it only ensures that pic_x and pic_y are multiples of 2 if the output format requires it. Also inlcudes fixes to take pic_x/y into account properly when copying the buffer. https://bugzilla.gnome.org/show_bug.cgi?id=594729
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0ac35d8555
commit
a3e92d3078
1 changed files with 25 additions and 19 deletions
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@ -909,16 +909,25 @@ theora_handle_type_packet (GstTheoraDec * dec, ogg_packet * packet)
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}
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if (dec->crop) {
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/* add black borders to make width/height/offsets even. we need this because
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* we cannot express an offset to the peer plugin. */
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dec->width = GST_ROUND_UP_2 (dec->info.pic_width + (dec->info.pic_x & 1));
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dec->height = GST_ROUND_UP_2 (dec->info.pic_height + (dec->info.pic_y & 1));
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dec->offset_x = dec->info.pic_x & ~1;
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dec->offset_y = dec->info.pic_y & ~1;
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} else {
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/* no cropping, use the encoded dimensions */
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dec->width = dec->info.pic_width;
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dec->height = dec->info.pic_height;
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dec->offset_x = dec->info.pic_x;
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dec->offset_y = dec->info.pic_y;
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/* Ensure correct offsets in chroma for formats that need it
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* by rounding the offset. libtheora will add proper pixels,
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* so no need to handle them ourselves. */
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if (dec->offset_x & 1 && dec->info.pixel_fmt != TH_PF_444) {
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dec->offset_x--;
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dec->width++;
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}
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if (dec->offset_y & 1 && dec->info.pixel_fmt == TH_PF_420) {
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dec->offset_y--;
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dec->height++;
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}
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} else {
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/* no cropping, use the encoded dimensions */
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dec->width = dec->info.frame_width;
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dec->height = dec->info.frame_height;
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dec->offset_x = 0;
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dec->offset_y = 0;
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}
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@ -1176,7 +1185,7 @@ theora_handle_422_image (GstTheoraDec * dec, th_ycbcr_buffer buf,
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GstBuffer ** out)
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{
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gint width = dec->width;
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gint uvwidth = dec->width / 2;
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gint uvwidth = GST_ROUND_UP_2 (dec->width) / 2;
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gint height = dec->height;
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gint out_size;
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gint ystride, uvstride;
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@ -1198,21 +1207,21 @@ theora_handle_422_image (GstTheoraDec * dec, th_ycbcr_buffer buf,
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dst = GST_BUFFER_DATA (*out);
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src = buf[0].data;
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src = buf[0].data + dec->offset_x + dec->offset_y * buf[0].stride;
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for (i = 0; i < height; i++) {
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memcpy (dst, src, width);
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src += buf[0].stride;
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dst += ystride;
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}
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src = buf[1].data;
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src = buf[1].data + dec->offset_x / 2 + dec->offset_y * buf[1].stride;
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for (i = 0; i < height; i++) {
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memcpy (dst, src, uvwidth);
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src += buf[1].stride;
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dst += uvstride;
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}
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src = buf[2].data;
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src = buf[2].data + dec->offset_x / 2 + dec->offset_y * buf[2].stride;
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for (i = 0; i < height; i++) {
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memcpy (dst, src, uvwidth);
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src += buf[2].stride;
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@ -1234,8 +1243,8 @@ theora_handle_420_image (GstTheoraDec * dec, th_ycbcr_buffer buf,
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{
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gint width = dec->width;
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gint height = dec->height;
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gint cwidth = width / 2;
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gint cheight = height / 2;
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gint cwidth = GST_ROUND_UP_2 (width) / 2;
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gint cheight = GST_ROUND_UP_2 (height) / 2;
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gint out_size;
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gint stride_y, stride_uv;
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GstFlowReturn result;
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@ -1269,7 +1278,6 @@ theora_handle_420_image (GstTheoraDec * dec, th_ycbcr_buffer buf,
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guchar *dest_y, *src_y;
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guchar *dest_u, *src_u;
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guchar *dest_v, *src_v;
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gint offset;
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dest_y = GST_BUFFER_DATA (*out);
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dest_u = dest_y + stride_y * GST_ROUND_UP_2 (height);
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@ -1290,10 +1298,8 @@ theora_handle_420_image (GstTheoraDec * dec, th_ycbcr_buffer buf,
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src_y += buf[0].stride;
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}
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offset = dec->offset_x / 2 + dec->offset_y / 2 * buf[1].stride;
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src_u = buf[1].data + offset;
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src_v = buf[2].data + offset;
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src_u = buf[1].data + dec->offset_x / 2 + dec->offset_y / 2 * buf[1].stride;
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src_v = buf[2].data + dec->offset_x / 2 + dec->offset_y / 2 * buf[2].stride;
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for (i = 0; i < cheight; i++) {
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memcpy (dest_u, src_u, cwidth);
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