From 69934d5915d178e1d25c833b3b13e21493674385 Mon Sep 17 00:00:00 2001 From: Wim Taymans Date: Wed, 28 Jul 2004 14:03:46 +0000 Subject: [PATCH] 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. --- ChangeLog | 11 ++++++ ext/theora/theoradec.c | 97 ++++++++++++++++++++++++++++++++++++++++++-------- ext/theora/theoraenc.c | 5 ++- 3 files changed, 97 insertions(+), 16 deletions(-) diff --git a/ChangeLog b/ChangeLog index 8252702..a2e2368 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,14 @@ +2004-07-28 Wim Taymans + + * 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. + 2004-07-28 Jan Schmidt * ext/dvdnav/README: diff --git a/ext/theora/theoradec.c b/ext/theora/theoradec.c index e056b84..a4fc976 100644 --- a/ext/theora/theoradec.c +++ b/ext/theora/theoradec.c @@ -460,6 +460,10 @@ theora_dec_event (GstTheoraDec * dec, GstEvent * event) gst_pad_event_default (dec->sinkpad, event); } +#define ROUND_UP_2(x) (((x) + 1) & ~1) +#define ROUND_UP_4(x) (((x) + 3) & ~3) +#define ROUND_UP_8(x) (((x) + 7) & ~7) + static void theora_dec_chain (GstPad * pad, GstData * data) { @@ -545,9 +549,19 @@ theora_dec_chain (GstPad * pad, GstData * data) par_den = dec->info.aspect_denominator; if (par_num == 0 && par_den == 0) { par_num = par_den = 1; + } - GST_DEBUG_OBJECT (dec, "video %dx%d, PAR %d/%d", dec->info.width, + /* theora has: + * + * width/height : dimension of the encoded frame + * frame_width/frame_height : dimension of the visible part + * offset_x/offset_y : offset in encoded frame where visible part starts + */ + GST_DEBUG_OBJECT (dec, "dimension %dx%d, PAR %d/%d", dec->info.width, dec->info.height, par_num, par_den); + GST_DEBUG_OBJECT (dec, "frame dimension %dx%d, offset %d:%d", + dec->info.frame_width, dec->info.frame_height, + dec->info.offset_x, dec->info.offset_y); /* done */ theora_decode_init (&dec->state, &dec->info); @@ -556,8 +570,8 @@ theora_dec_chain (GstPad * pad, GstData * data) "framerate", G_TYPE_DOUBLE, ((gdouble) dec->info.fps_numerator) / dec->info.fps_denominator, "pixel-aspect-ratio", GST_TYPE_FRACTION, par_num, par_den, - "width", G_TYPE_INT, dec->info.width, "height", G_TYPE_INT, - dec->info.height, NULL); + "width", G_TYPE_INT, dec->info.frame_width, "height", G_TYPE_INT, + dec->info.frame_height, NULL); gst_pad_set_explicit_caps (dec->srcpad, caps); gst_caps_free (caps); } @@ -565,9 +579,12 @@ theora_dec_chain (GstPad * pad, GstData * data) /* normal data packet */ yuv_buffer yuv; GstBuffer *out; - guint8 *y, *v, *u; guint i; gboolean keyframe; + gint out_size; + gint stride_y, stride_uv; + gint width, height; + gint cwidth, cheight; /* the second most significant bit of the first data byte is cleared * for keyframes */ @@ -591,20 +608,70 @@ theora_dec_chain (GstPad * pad, GstData * data) gst_data_unref (data); return; } + g_return_if_fail (yuv.y_width == dec->info.width); g_return_if_fail (yuv.y_height == dec->info.height); - out = gst_pad_alloc_buffer (dec->srcpad, GST_BUFFER_OFFSET_NONE, - yuv.y_width * yuv.y_height * 3 / 2); - y = GST_BUFFER_DATA (out); - u = y + yuv.y_width * yuv.y_height; - v = u + yuv.y_width * yuv.y_height / 4; - for (i = 0; i < yuv.y_height; i++) { - memcpy (y + i * yuv.y_width, yuv.y + i * yuv.y_stride, yuv.y_width); - } - for (i = 0; i < yuv.y_height / 2; i++) { - memcpy (u + i * yuv.uv_width, yuv.u + i * yuv.uv_stride, yuv.uv_width); - memcpy (v + i * yuv.uv_width, yuv.v + i * yuv.uv_stride, yuv.uv_width); + + width = dec->info.frame_width; + height = dec->info.frame_height; + + /* should get the stride from the caps, for now we round up to the nearest + * multiple of 4 because some element needs it. chroma needs special + * treatment, see videotestsrc. */ + stride_y = ROUND_UP_4 (width); + stride_uv = ROUND_UP_8 (width) / 2; + + /* for odd offsets we need to copy one extra line/column of chroma samples */ + cwidth = width / 2 + (dec->info.offset_x & 1); + cheight = height / 2 + (dec->info.offset_y & 1); + + out_size = stride_y * height + stride_uv * cheight * 2; + + /* now copy over the area contained in offset_x,offset_y, + * frame_width, frame_height */ + out = gst_pad_alloc_buffer (dec->srcpad, GST_BUFFER_OFFSET_NONE, out_size); + + /* copy the visible region to the destination. This is actually pretty + * complicated and gstreamer doesn't support all the needed caps to do this + * correctly. For example, when we have an odd offset, we should only combine + * 1 row/column of luma samples with on chroma sample in colorspace conversion. + */ + { + guint8 *dest_y, *src_y; + guint8 *dest_u, *src_u; + guint8 *dest_v, *src_v; + + dest_y = GST_BUFFER_DATA (out); + dest_u = dest_y + stride_y * height; + dest_v = dest_u + stride_uv * height / 2; + + src_y = yuv.y + dec->info.offset_x + dec->info.offset_y * yuv.y_stride; + + for (i = 0; i < height; i++) { + memcpy (dest_y, src_y, width); + + dest_y += stride_y; + src_y += yuv.y_stride; + } + + src_u = + yuv.u + dec->info.offset_x / 2 + + dec->info.offset_y / 2 * yuv.uv_stride; + src_v = + yuv.v + dec->info.offset_x / 2 + + dec->info.offset_y / 2 * yuv.uv_stride; + + for (i = 0; i < cheight; i++) { + memcpy (dest_u, src_u, cwidth); + memcpy (dest_v, src_v, cwidth); + + dest_u += stride_uv; + src_u += yuv.uv_stride; + dest_v += stride_uv; + src_v += yuv.uv_stride; + } } + GST_BUFFER_OFFSET (out) = dec->packetno - 4; GST_BUFFER_OFFSET_END (out) = dec->packetno - 3; GST_BUFFER_DURATION (out) = diff --git a/ext/theora/theoraenc.c b/ext/theora/theoraenc.c index 34491fd..4228d2d 100644 --- a/ext/theora/theoraenc.c +++ b/ext/theora/theoraenc.c @@ -245,8 +245,11 @@ theora_enc_sink_link (GstPad * pad, const GstCaps * caps) par = gst_structure_get_value (structure, "pixel-aspect-ratio"); /* Theora has a divisible-by-sixteen restriction for the encoded video size */ - if ((enc->width & 0x0f) != 0 || (enc->height & 0x0f) != 0) + if ((enc->width & 0x0f) != 0 || (enc->height & 0x0f) != 0) { + GST_DEBUG ("width and height not a multiple of 16 in caps %" GST_PTR_FORMAT, + caps); return GST_PAD_LINK_REFUSED; + } theora_info_init (&enc->info); enc->info.width = enc->width; -- 2.7.4