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ext/theora/: Added first attempt at cropping of the image as required by the theora spec. We need more properties in ...
Original commit message from CVS: * ext/theora/theoradec.c: (theora_get_formats), (theora_dec_src_convert), (theora_dec_sink_convert), (theora_dec_src_query), (theora_dec_src_event), (theora_dec_event), (theora_dec_chain): * ext/theora/theoraenc.c: (theora_enc_sink_link): Added first attempt at cropping of the image as required by the theora spec. We need more properties in the caps (offset_x, offset_y,stride) to implement this correctly. Added some debug info in the encoder. Note :the encoder is not updated with the offset code.
This commit is contained in:
Wim Taymans
parent
8aafec7515
commit
69934d5915
3 changed files with 97 additions and 16 deletions
11
ChangeLog
11
ChangeLog
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@ -1,3 +1,14 @@
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2004-07-28 Wim Taymans <wim@fluendo.com>
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* ext/theora/theoradec.c: (theora_get_formats),
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(theora_dec_src_convert), (theora_dec_sink_convert),
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(theora_dec_src_query), (theora_dec_src_event), (theora_dec_event),
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(theora_dec_chain):
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* ext/theora/theoraenc.c: (theora_enc_sink_link):
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Added first attempt at cropping of the image as required by the
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theora spec. We need more properties in the caps (offset_x,
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offset_y,stride) to implement this correctly.
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2004-07-28 Jan Schmidt <thaytan@mad.scientist.com>
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* ext/dvdnav/README:
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@ -460,6 +460,10 @@ theora_dec_event (GstTheoraDec * dec, GstEvent * event)
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gst_pad_event_default (dec->sinkpad, event);
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}
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#define ROUND_UP_2(x) (((x) + 1) & ~1)
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#define ROUND_UP_4(x) (((x) + 3) & ~3)
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#define ROUND_UP_8(x) (((x) + 7) & ~7)
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static void
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theora_dec_chain (GstPad * pad, GstData * data)
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{
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@ -545,9 +549,19 @@ theora_dec_chain (GstPad * pad, GstData * data)
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par_den = dec->info.aspect_denominator;
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if (par_num == 0 && par_den == 0) {
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par_num = par_den = 1;
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}
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GST_DEBUG_OBJECT (dec, "video %dx%d, PAR %d/%d", dec->info.width,
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/* theora has:
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*
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* width/height : dimension of the encoded frame
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* frame_width/frame_height : dimension of the visible part
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* offset_x/offset_y : offset in encoded frame where visible part starts
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*/
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GST_DEBUG_OBJECT (dec, "dimension %dx%d, PAR %d/%d", dec->info.width,
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dec->info.height, par_num, par_den);
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GST_DEBUG_OBJECT (dec, "frame dimension %dx%d, offset %d:%d",
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dec->info.frame_width, dec->info.frame_height,
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dec->info.offset_x, dec->info.offset_y);
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/* done */
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theora_decode_init (&dec->state, &dec->info);
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@ -556,8 +570,8 @@ theora_dec_chain (GstPad * pad, GstData * data)
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"framerate", G_TYPE_DOUBLE,
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((gdouble) dec->info.fps_numerator) / dec->info.fps_denominator,
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"pixel-aspect-ratio", GST_TYPE_FRACTION, par_num, par_den,
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"width", G_TYPE_INT, dec->info.width, "height", G_TYPE_INT,
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dec->info.height, NULL);
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"width", G_TYPE_INT, dec->info.frame_width, "height", G_TYPE_INT,
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dec->info.frame_height, NULL);
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gst_pad_set_explicit_caps (dec->srcpad, caps);
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gst_caps_free (caps);
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}
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@ -565,9 +579,12 @@ theora_dec_chain (GstPad * pad, GstData * data)
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/* normal data packet */
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yuv_buffer yuv;
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GstBuffer *out;
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guint8 *y, *v, *u;
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guint i;
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gboolean keyframe;
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gint out_size;
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gint stride_y, stride_uv;
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gint width, height;
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gint cwidth, cheight;
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/* the second most significant bit of the first data byte is cleared
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* for keyframes */
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@ -591,20 +608,70 @@ theora_dec_chain (GstPad * pad, GstData * data)
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gst_data_unref (data);
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return;
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}
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g_return_if_fail (yuv.y_width == dec->info.width);
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g_return_if_fail (yuv.y_height == dec->info.height);
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out = gst_pad_alloc_buffer (dec->srcpad, GST_BUFFER_OFFSET_NONE,
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yuv.y_width * yuv.y_height * 3 / 2);
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y = GST_BUFFER_DATA (out);
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u = y + yuv.y_width * yuv.y_height;
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v = u + yuv.y_width * yuv.y_height / 4;
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for (i = 0; i < yuv.y_height; i++) {
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memcpy (y + i * yuv.y_width, yuv.y + i * yuv.y_stride, yuv.y_width);
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width = dec->info.frame_width;
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height = dec->info.frame_height;
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/* should get the stride from the caps, for now we round up to the nearest
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* multiple of 4 because some element needs it. chroma needs special
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* treatment, see videotestsrc. */
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stride_y = ROUND_UP_4 (width);
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stride_uv = ROUND_UP_8 (width) / 2;
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/* for odd offsets we need to copy one extra line/column of chroma samples */
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cwidth = width / 2 + (dec->info.offset_x & 1);
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cheight = height / 2 + (dec->info.offset_y & 1);
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out_size = stride_y * height + stride_uv * cheight * 2;
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/* now copy over the area contained in offset_x,offset_y,
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* frame_width, frame_height */
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out = gst_pad_alloc_buffer (dec->srcpad, GST_BUFFER_OFFSET_NONE, out_size);
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/* copy the visible region to the destination. This is actually pretty
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* complicated and gstreamer doesn't support all the needed caps to do this
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* correctly. For example, when we have an odd offset, we should only combine
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* 1 row/column of luma samples with on chroma sample in colorspace conversion.
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*/
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{
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guint8 *dest_y, *src_y;
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guint8 *dest_u, *src_u;
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guint8 *dest_v, *src_v;
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dest_y = GST_BUFFER_DATA (out);
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dest_u = dest_y + stride_y * height;
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dest_v = dest_u + stride_uv * height / 2;
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src_y = yuv.y + dec->info.offset_x + dec->info.offset_y * yuv.y_stride;
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for (i = 0; i < height; i++) {
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memcpy (dest_y, src_y, width);
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dest_y += stride_y;
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src_y += yuv.y_stride;
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}
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for (i = 0; i < yuv.y_height / 2; i++) {
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memcpy (u + i * yuv.uv_width, yuv.u + i * yuv.uv_stride, yuv.uv_width);
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memcpy (v + i * yuv.uv_width, yuv.v + i * yuv.uv_stride, yuv.uv_width);
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src_u =
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yuv.u + dec->info.offset_x / 2 +
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dec->info.offset_y / 2 * yuv.uv_stride;
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src_v =
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yuv.v + dec->info.offset_x / 2 +
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dec->info.offset_y / 2 * yuv.uv_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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memcpy (dest_v, src_v, cwidth);
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dest_u += stride_uv;
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src_u += yuv.uv_stride;
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dest_v += stride_uv;
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src_v += yuv.uv_stride;
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}
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}
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GST_BUFFER_OFFSET (out) = dec->packetno - 4;
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GST_BUFFER_OFFSET_END (out) = dec->packetno - 3;
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GST_BUFFER_DURATION (out) =
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@ -245,8 +245,11 @@ theora_enc_sink_link (GstPad * pad, const GstCaps * caps)
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par = gst_structure_get_value (structure, "pixel-aspect-ratio");
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/* Theora has a divisible-by-sixteen restriction for the encoded video size */
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if ((enc->width & 0x0f) != 0 || (enc->height & 0x0f) != 0)
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if ((enc->width & 0x0f) != 0 || (enc->height & 0x0f) != 0) {
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GST_DEBUG ("width and height not a multiple of 16 in caps %" GST_PTR_FORMAT,
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caps);
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return GST_PAD_LINK_REFUSED;
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}
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theora_info_init (&enc->info);
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enc->info.width = enc->width;
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