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basevideodecoder: Work with a copy of the GstVideoState in setcaps until the caps are accepted

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Also fix a refcount problem with the codec_data.
This commit is contained in:
Sebastian Dröge 2011-07-11 08:54:53 +02:00
parent e61d3d1a0c
commit 584859488b
1 changed files with 25 additions and 19 deletions
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44
gst-libs/gst/video/gstbasevideodecoder.c
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@ -270,7 +270,7 @@ gst_base_video_decoder_sink_setcaps (GstPad * pad, GstCaps * caps)
GstBaseVideoDecoderClass *base_video_decoder_class;
GstStructure *structure;
const GValue *codec_data;
GstVideoState *state;
GstVideoState state;
gboolean ret = TRUE;
base_video_decoder = GST_BASE_VIDEO_DECODER (gst_pad_get_parent (pad));
@ -279,41 +279,47 @@ gst_base_video_decoder_sink_setcaps (GstPad * pad, GstCaps * caps)
GST_DEBUG_OBJECT (base_video_decoder, "setcaps %" GST_PTR_FORMAT, caps);
state = &GST_BASE_VIDEO_CODEC (base_video_decoder)->state;
memset (&state, 0, sizeof (state));
gst_buffer_replace (&state->codec_data, NULL);
gst_caps_replace (&state->caps, NULL);
memset (state, 0, sizeof (GstVideoState));
state->caps = gst_caps_ref (caps);
state.caps = gst_caps_ref (caps);
structure = gst_caps_get_structure (caps, 0);
gst_video_format_parse_caps (caps, NULL, &state->width, &state->height);
gst_video_format_parse_caps (caps, NULL, &state.width, &state.height);
/* this one fails if no framerate in caps */
if (!gst_video_parse_caps_framerate (caps, &state->fps_n, &state->fps_d)) {
state->fps_n = 0;
state->fps_d = 1;
if (!gst_video_parse_caps_framerate (caps, &state.fps_n, &state.fps_d)) {
state.fps_n = 0;
state.fps_d = 1;
}
/* but the p-a-r sets 1/1 instead, which is not quite informative ... */
if (!gst_structure_has_field (structure, "pixel-aspect-ratio") ||
!gst_video_parse_caps_pixel_aspect_ratio (caps,
&state->par_n, &state->par_d)) {
state->par_n = 0;
state->par_d = 1;
&state.par_n, &state.par_d)) {
state.par_n = 0;
state.par_d = 1;
}
state->have_interlaced =
gst_video_format_parse_caps_interlaced (caps, &state->interlaced);
state.have_interlaced =
gst_video_format_parse_caps_interlaced (caps, &state.interlaced);
codec_data = gst_structure_get_value (structure, "codec_data");
if (codec_data && G_VALUE_TYPE (codec_data) == GST_TYPE_BUFFER) {
state->codec_data = gst_value_get_buffer (codec_data);
state.codec_data = GST_BUFFER (gst_value_dup_mini_object (codec_data));
}
if (base_video_decoder_class->set_format) {
ret = base_video_decoder_class->set_format (base_video_decoder,
&GST_BASE_VIDEO_CODEC (base_video_decoder)->state);
ret = base_video_decoder_class->set_format (base_video_decoder, &state);
}
if (ret) {
gst_buffer_replace (&GST_BASE_VIDEO_CODEC (base_video_decoder)->
state.codec_data, NULL);
gst_caps_replace (&GST_BASE_VIDEO_CODEC (base_video_decoder)->state.caps,
NULL);
GST_BASE_VIDEO_CODEC (base_video_decoder)->state = state;
} else {
gst_buffer_replace (&state.codec_data, NULL);
gst_caps_replace (&state.caps, NULL);
}
g_object_unref (base_video_decoder);