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theoradec: Use crop metadata if possible and refactor cropping code a bit

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This commit is contained in:
Sebastian Dröge 2012-04-24 22:35:58 +02:00
parent 1483997207
commit 894875d705
2 changed files with 116 additions and 32 deletions
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145
ext/theora/gsttheoradec.c
View file

@ -102,6 +102,8 @@ static GstFlowReturn theora_dec_parse (GstVideoDecoder * decoder,
GstVideoCodecFrame * frame, GstAdapter * adapter, gboolean at_eos);
static GstFlowReturn theora_dec_handle_frame (GstVideoDecoder * decoder,
GstVideoCodecFrame * frame);
static gboolean theora_dec_configure_buffer_pool (GstVideoDecoder * decoder,
GstQuery * query, GstBufferPool * pool);
static GstFlowReturn theora_dec_decode_buffer (GstTheoraDec * dec,
GstBuffer * buf, GstVideoCodecFrame * frame);
@ -183,6 +185,8 @@ gst_theora_dec_class_init (GstTheoraDecClass * klass)
video_decoder_class->parse = GST_DEBUG_FUNCPTR (theora_dec_parse);
video_decoder_class->handle_frame =
GST_DEBUG_FUNCPTR (theora_dec_handle_frame);
video_decoder_class->configure_buffer_pool =
GST_DEBUG_FUNCPTR (theora_dec_configure_buffer_pool);
GST_DEBUG_CATEGORY_INIT (theoradec_debug, "theoradec", 0, "Theora decoder");
}
@ -203,6 +207,7 @@ static void
gst_theora_dec_reset (GstTheoraDec * dec)
{
dec->need_keyframe = TRUE;
dec->can_crop = FALSE;
}
static gboolean
@ -424,16 +429,21 @@ theora_handle_type_packet (GstTheoraDec * dec, ogg_packet * packet)
goto unsupported_format;
}
/* FIXME: Use crop metadata */
GST_VIDEO_INFO_WIDTH (info) = dec->info.pic_width;
GST_VIDEO_INFO_HEIGHT (info) = dec->info.pic_height;
/* no cropping, use the encoded dimensions */
GST_VIDEO_INFO_WIDTH (info) = dec->info.frame_width;
GST_VIDEO_INFO_HEIGHT (info) = dec->info.frame_height;
dec->offset_x = 0;
dec->offset_y = 0;
/* Ensure correct offsets in chroma for formats that need it
* by rounding the offset. libtheora will add proper pixels,
* so no need to handle them ourselves. */
if (dec->info.pic_x & 1 && dec->info.pixel_fmt != TH_PF_444) {
GST_VIDEO_INFO_WIDTH (info)++;
}
if (dec->info.pic_y & 1 && dec->info.pixel_fmt == TH_PF_420) {
GST_VIDEO_INFO_HEIGHT (info)++;
}
GST_DEBUG_OBJECT (dec, "after fixup frame dimension %dx%d, offset %d:%d",
info->width, info->height, dec->offset_x, dec->offset_y);
info->width, info->height, dec->info.pic_x, dec->info.pic_y);
/* done */
dec->decoder = th_decode_alloc (&dec->info, dec->setup);
@ -548,13 +558,14 @@ theora_handle_image (GstTheoraDec * dec, th_ycbcr_buffer buf,
GstVideoCodecFrame * frame)
{
GstVideoDecoder *decoder = GST_VIDEO_DECODER (dec);
GstVideoInfo *info;
gint width, height, stride;
GstFlowReturn result;
int i, plane;
gint i, comp;
guint8 *dest, *src;
GstBuffer *out;
GstMapInfo minfo;
GstVideoFrame vframe;
GstVideoCropMeta *crop;
gint pic_width, pic_height;
gint offset_x, offset_y;
result = gst_video_decoder_alloc_output_frame (decoder, frame);
@ -564,38 +575,77 @@ theora_handle_image (GstTheoraDec * dec, th_ycbcr_buffer buf,
return result;
}
out = frame->output_buffer;
info = &dec->output_state->info;
if (!dec->can_crop) {
/* we need to crop the hard way */
offset_x = dec->info.pic_x;
offset_y = dec->info.pic_y;
pic_width = dec->info.pic_width;
pic_height = dec->info.pic_height;
/* Ensure correct offsets in chroma for formats that need it
* by rounding the offset. libtheora will add proper pixels,
* so no need to handle them ourselves. */
if (offset_x & 1 && dec->info.pixel_fmt != TH_PF_444)
offset_x--;
if (offset_y & 1 && dec->info.pixel_fmt == TH_PF_420)
offset_y--;
} else {
/* copy the whole frame */
offset_x = 0;
offset_y = 0;
pic_width = dec->info.frame_width;
pic_height = dec->info.frame_height;
gst_buffer_map (out, &minfo, GST_MAP_WRITE);
if (dec->info.pic_width != dec->info.frame_width ||
dec->info.pic_height != dec->info.frame_height ||
dec->info.pic_x != 0 || dec->info.pic_y != 0) {
crop = gst_buffer_add_video_crop_meta (frame->output_buffer);
/* FIXME : Use crop metadata */
for (plane = 0; plane < 3; plane++) {
width = GST_VIDEO_INFO_COMP_WIDTH (info, plane);
height = GST_VIDEO_INFO_COMP_HEIGHT (info, plane);
stride = GST_VIDEO_INFO_COMP_STRIDE (info, plane);
/* we can do things slightly more efficient when we know that
* downstream understands clipping */
crop->x = dec->info.pic_x;
crop->y = dec->info.pic_y;
crop->width = dec->info.pic_width;
crop->height = dec->info.pic_height;
}
}
dest = minfo.data + GST_VIDEO_INFO_COMP_OFFSET (info, plane);
src = buf[plane].data;
src +=
((height ==
GST_VIDEO_INFO_HEIGHT (info)) ? dec->offset_y : dec->offset_y / 2)
* buf[plane].stride;
src +=
(width ==
GST_VIDEO_INFO_WIDTH (info)) ? dec->offset_x : dec->offset_x / 2;
/* if only libtheora would allow us to give it a destination frame */
GST_CAT_TRACE_OBJECT (GST_CAT_PERFORMANCE, dec,
"doing unavoidable video frame copy");
if (G_UNLIKELY (!gst_video_frame_map (&vframe, &dec->output_state->info,
frame->output_buffer, GST_MAP_WRITE)))
goto invalid_frame;
for (comp = 0; comp < 3; comp++) {
width =
GST_VIDEO_FORMAT_INFO_SCALE_WIDTH (vframe.info.finfo, comp, pic_width);
height =
GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (vframe.info.finfo, comp,
pic_height);
stride = GST_VIDEO_FRAME_COMP_STRIDE (&vframe, comp);
dest = GST_VIDEO_FRAME_COMP_DATA (&vframe, comp);
src = buf[comp].data;
src += ((height == pic_height) ? offset_y : offset_y / 2)
* buf[comp].stride;
src += (width == pic_width) ? offset_x : offset_x / 2;
for (i = 0; i < height; i++) {
memcpy (dest, src, width);
dest += stride;
src += buf[plane].stride;
src += buf[comp].stride;
}
}
gst_buffer_unmap (out, &minfo);
gst_video_frame_unmap (&vframe);
return GST_FLOW_OK;
invalid_frame:
{
GST_DEBUG_OBJECT (dec, "could not map video frame");
return GST_FLOW_ERROR;
}
}
static GstFlowReturn
@ -744,6 +794,39 @@ theora_dec_handle_frame (GstVideoDecoder * bdec, GstVideoCodecFrame * frame)
return res;
}
static gboolean
theora_dec_configure_buffer_pool (GstVideoDecoder * decoder, GstQuery * query,
GstBufferPool * pool)
{
GstTheoraDec *dec = GST_THEORA_DEC (decoder);
dec->can_crop =
gst_query_has_allocation_meta (query, GST_VIDEO_CROP_META_API_TYPE);
if (dec->can_crop) {
GstStructure *config;
GstVideoInfo info;
GstCaps *caps;
guint size, min, max;
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_get_params (config, &caps, &size, &min, &max);
/* Calculate uncropped size */
gst_video_info_init (&info);
gst_video_info_from_caps (&info, caps);
gst_video_info_set_format (&info, info.finfo->format, dec->info.frame_width,
dec->info.frame_height);
size = MAX (size, info.size);
gst_buffer_pool_config_set_params (config, caps, size, min, max);
gst_buffer_pool_set_config (pool, config);
}
return GST_VIDEO_DECODER_CLASS (parent_class)->configure_buffer_pool (decoder,
query, pool);
}
static void
theora_dec_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)

3
ext/theora/gsttheoradec.h
View file

@ -69,7 +69,6 @@ struct _GstTheoraDec
gboolean need_keyframe;
GstVideoCodecState *input_state;
GstVideoCodecState *output_state;
gint offset_x, offset_y;
/* telemetry debuging options */
gint telemetry_mv;
@ -78,6 +77,8 @@ struct _GstTheoraDec
gint telemetry_bits;
GstTagList *tags;
gboolean can_crop;
};
struct _GstTheoraDecClass