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Diffstat (limited to 'src/gstducativc1dec.c')
| -rw-r--r-- | src/gstducativc1dec.c | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/src/gstducativc1dec.c b/src/gstducativc1dec.c new file mode 100644 index 0000000..ace7baf --- /dev/null +++ b/src/gstducativc1dec.c @@ -0,0 +1,218 @@ +/* + * GStreamer + * Copyright (c) 2010, Texas Instruments Incorporated + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation + * version 2.1 of the License. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** + * SECTION:element-ducativc1dec + * + * FIXME:Describe ducativc1dec here. + * + * <refsect2> + * <title>Example launch line</title> + * |[ + * gst-launch -v -m fakesrc ! ducativc1dec ! fakesink silent=TRUE + * ]| + * </refsect2> + */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <gst/gst.h> +#include <gst/video/video.h> + +#include "gstducativc1dec.h" + + +#define PADX 32 +#define PADY 40 + + +GST_BOILERPLATE (GstDucatiVC1Dec, gst_ducati_vc1dec, GstDucatiVidDec, + GST_TYPE_DUCATIVIDDEC); + +static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink", + GST_PAD_SINK, + GST_PAD_ALWAYS, + GST_STATIC_CAPS ("video/x-wmv, " + "wmvversion = (int)[ 2, 3 ], " + "format = (fourcc){ WVC1, WMV3, WMV2, WMV1 }, " + "width = (int)[ 16, 2048 ], " + "height = (int)[ 16, 2048 ], " + "framerate = (fraction)[ 0, max ];") + ); + +/* GstDucatiVidDec vmethod implementations */ + +static gboolean +gst_ducati_vc1dec_parse_caps (GstDucatiVidDec * vdec, GstStructure * s) +{ + GstDucatiVC1Dec *self = GST_DUCATIVC1DEC (vdec); + + if (parent_class->parse_caps (vdec, s)) { + guint32 format; + gboolean ret = gst_structure_get_fourcc (s, "format", &format); + if (ret) { + switch (format) { + case GST_MAKE_FOURCC ('W', 'V', 'C', '1'): + self->level = 4; + break; + case GST_MAKE_FOURCC ('W', 'M', 'V', '3'): + self->level = 3; + break; + case GST_MAKE_FOURCC ('W', 'M', 'V', '2'): + self->level = 2; + break; + case GST_MAKE_FOURCC ('W', 'M', 'V', '1'): + self->level = 1; + break; + default: + ret = FALSE; + break; + } + } + return ret; + } + + return FALSE; +} + +static void +gst_ducati_vc1dec_update_buffer_size (GstDucatiVidDec * self) +{ + gint w = self->width; + gint h = self->height; + + /* calculate output buffer parameters: */ + self->padded_width = (w + (2 * PADX) + 0x7f) & ~0x7f; + self->padded_height = (((h / 2 + 0xf) & ~0xf) * 2) + 2 * PADY; + self->min_buffers = 8; +} + +static gboolean +gst_ducati_vc1dec_allocate_params (GstDucatiVidDec * self, gint params_sz, + gint dynparams_sz, gint status_sz, gint inargs_sz, gint outargs_sz) +{ + gboolean ret = parent_class->allocate_params (self, + sizeof (IVC1VDEC_Params), sizeof (IVC1VDEC_DynamicParams), + sizeof (IVC1VDEC_Status), sizeof (IVC1VDEC_InArgs), + sizeof (IVC1VDEC_OutArgs)); + + if (ret) { + IVC1VDEC_Params *params = (IVC1VDEC_Params *) self->params; + self->params->maxBitRate = 45000000; + self->params->displayDelay = IVIDDEC3_DISPLAY_DELAY_1; + params->FrameLayerDataPresentFlag = FALSE; + } + + return ret; +} + +static GstBuffer * +gst_ducati_vc1dec_push_input (GstDucatiVidDec * vdec, GstBuffer * buf) +{ + GstDucatiVC1Dec *self = GST_DUCATIVC1DEC (vdec); + + if (G_UNLIKELY (vdec->first_in_buffer) && vdec->codec_data) { + if (self->level == 4) { + /* for VC-1 Advanced Profile, strip off first byte, and + * send rest of codec_data unmodified; + */ + push_input (vdec, GST_BUFFER_DATA (vdec->codec_data) + 1, + GST_BUFFER_SIZE (vdec->codec_data) - 1); + } else { + guint32 val; + + /* for VC-1 Simple and Main Profile, build the Table 265 Sequence + * Layer Data Structure header (refer to VC-1 spec, Annex L): + */ + + val = 0xc5ffffff; /* we don't know the number of frames */ + push_input (vdec, (guint8 *) & val, 4); + + /* STRUCT_C (preceded by length).. see Table 263, 264 */ + val = GST_BUFFER_SIZE (vdec->codec_data); + push_input (vdec, (guint8 *) & val, 4); + push_input (vdec, GST_BUFFER_DATA (vdec->codec_data), val); + + /* STRUCT_A.. see Table 260 and Annex J.2 */ + push_input (vdec, (guint8 *) & vdec->height, 4); + push_input (vdec, (guint8 *) & vdec->width, 4); + + val = 0x0000000c; + push_input (vdec, (guint8 *) & val, 4); + + /* STRUCT_B.. see Table 261, 262 */ + val = 0x00000000; /* not sure how to populate, but codec ignores anyways */ + push_input (vdec, (guint8 *) & val, 4); + push_input (vdec, (guint8 *) & val, 4); + push_input (vdec, (guint8 *) & val, 4); + } + } + + /* VC-1 Advanced profile needs start-code prepended: */ + if (self->level == 4) { + static guint8 sc[] = { 0x00, 0x00, 0x01, 0x0d }; /* start code */ + push_input (vdec, sc, sizeof (sc)); + } + + push_input (vdec, GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf)); + gst_buffer_unref (buf); + + return NULL; +} + + +/* GObject vmethod implementations */ + +static void +gst_ducati_vc1dec_base_init (gpointer gclass) +{ + GstElementClass *element_class = GST_ELEMENT_CLASS (gclass); + + gst_element_class_set_details_simple (element_class, + "DucatiVC1Dec", + "Codec/Decoder/Video", + "Decodes video in WMV/VC-1 format with ducati", + "Rob Clark <rob@ti.com>"); + + gst_element_class_add_pad_template (element_class, + gst_static_pad_template_get (&sink_factory)); +} + +static void +gst_ducati_vc1dec_class_init (GstDucatiVC1DecClass * klass) +{ + GstDucatiVidDecClass *bclass = GST_DUCATIVIDDEC_CLASS (klass); + bclass->codec_name = "ivahd_vc1vdec"; + bclass->parse_caps = + GST_DEBUG_FUNCPTR (gst_ducati_vc1dec_parse_caps); + bclass->update_buffer_size = + GST_DEBUG_FUNCPTR (gst_ducati_vc1dec_update_buffer_size); + bclass->allocate_params = + GST_DEBUG_FUNCPTR (gst_ducati_vc1dec_allocate_params); + bclass->push_input = + GST_DEBUG_FUNCPTR (gst_ducati_vc1dec_push_input); +} + +static void +gst_ducati_vc1dec_init (GstDucatiVC1Dec * self, + GstDucatiVC1DecClass * gclass) +{ +} |