/* GStreamer * Copyright (C) <1999> Erik Walthinsen * <2005> Wim Taymans * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * 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 * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ /** * SECTION:element-dvdec * * * * dvdec decodes DV video into raw video. The element expects a full DV frame * as input, which is 120000 bytes for NTSC and 144000 for PAL video. * * * This element can perform simple frame dropping with the drop-factor * property. Setting this property to a value N > 1 will only decode every * Nth frame. * * Example launch line * * * gst-launch filesrc location=test.dv ! dvdemux name=demux ! dvdec ! xvimagesink * * This pipeline decodes and renders the raw DV stream to a videosink. * * Last reviewed on 2006-02-28 (0.10.3) * */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include "gstdvdec.h" static GstElementDetails dvdec_details = GST_ELEMENT_DETAILS ("DV (smpte314) decoder plugin", "Codec/Decoder/Video", "Uses libdv to decode DV video (libdv.sourceforge.net)", "Erik Walthinsen ," "Wim Taymans "); /* sizes of one input buffer */ #define NTSC_BUFFER 120000 #define PAL_BUFFER 144000 #define DV_DEFAULT_QUALITY DV_QUALITY_BEST #define DV_DEFAULT_DECODE_NTH 1 GST_DEBUG_CATEGORY (dvdec_debug); #define GST_CAT_DEFAULT dvdec_debug enum { PROP_0, PROP_CLAMP_LUMA, PROP_CLAMP_CHROMA, PROP_QUALITY, PROP_DECODE_NTH }; const gint qualities[] = { DV_QUALITY_DC, DV_QUALITY_AC_1, DV_QUALITY_AC_2, DV_QUALITY_DC | DV_QUALITY_COLOR, DV_QUALITY_AC_1 | DV_QUALITY_COLOR, DV_QUALITY_AC_2 | DV_QUALITY_COLOR }; static GstStaticPadTemplate sink_temp = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS ("video/x-dv, systemstream = (boolean) false") ); static GstStaticPadTemplate src_temp = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS ("video/x-raw-yuv, " "format = (fourcc) YUY2, " "width = (int) 720, " "framerate = (fraction) [ 1/1, 60/1 ];" "video/x-raw-rgb, " "bpp = (int) 32, " "depth = (int) 24, " "endianness = (int) " G_STRINGIFY (G_BIG_ENDIAN) ", " "red_mask = (int) 0x0000ff00, " "green_mask = (int) 0x00ff0000, " "blue_mask = (int) 0xff000000, " "width = (int) 720, " "framerate = (fraction) [ 1/1, 60/1 ];" "video/x-raw-rgb, " "bpp = (int) 24, " "depth = (int) 24, " "endianness = (int) " G_STRINGIFY (G_BIG_ENDIAN) ", " "red_mask = (int) 0x00ff0000, " "green_mask = (int) 0x0000ff00, " "blue_mask = (int) 0x000000ff, " "width = (int) 720, " "framerate = (fraction) [ 1/1, 60/1 ]") ); #define GST_TYPE_DVDEC_QUALITY (gst_dvdec_quality_get_type()) GType gst_dvdec_quality_get_type (void) { static GType qtype = 0; if (qtype == 0) { static const GEnumValue values[] = { {0, "Monochrome, DC (Fastest)", "fastest"}, {1, "Monochrome, first AC coefficient", "monochrome-ac"}, {2, "Monochrome, highest quality", "monochrome-best"}, {3, "Colour, DC, fastest", "colour-fastest"}, {4, "Colour, using only the first AC coefficient", "colour-ac"}, {5, "Highest quality colour decoding", "best"}, {0, NULL, NULL}, }; qtype = g_enum_register_static ("GstDVDecQualityEnum", values); } return qtype; } GST_BOILERPLATE (GstDVDec, gst_dvdec, GstElement, GST_TYPE_ELEMENT); static gboolean gst_dvdec_sink_setcaps (GstPad * pad, GstCaps * caps); static GstFlowReturn gst_dvdec_chain (GstPad * pad, GstBuffer * buffer); static GstStateChangeReturn gst_dvdec_change_state (GstElement * element, GstStateChange transition); static void gst_dvdec_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_dvdec_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static void gst_dvdec_base_init (gpointer g_class) { GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&sink_temp)); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&src_temp)); gst_element_class_set_details (element_class, &dvdec_details); GST_DEBUG_CATEGORY_INIT (dvdec_debug, "dvdec", 0, "DV decoding element"); } static void gst_dvdec_class_init (GstDVDecClass * klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; gobject_class = (GObjectClass *) klass; gstelement_class = (GstElementClass *) klass; gobject_class->set_property = gst_dvdec_set_property; gobject_class->get_property = gst_dvdec_get_property; g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_CLAMP_LUMA, g_param_spec_boolean ("clamp_luma", "Clamp luma", "Clamp luma", FALSE, G_PARAM_READWRITE)); g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_CLAMP_CHROMA, g_param_spec_boolean ("clamp_chroma", "Clamp chroma", "Clamp chroma", FALSE, G_PARAM_READWRITE)); g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_QUALITY, g_param_spec_enum ("quality", "Quality", "Decoding quality", GST_TYPE_DVDEC_QUALITY, DV_DEFAULT_QUALITY, G_PARAM_READWRITE)); g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_DECODE_NTH, g_param_spec_int ("drop-factor", "Drop Factor", "Only decode Nth frame", 1, G_MAXINT, DV_DEFAULT_DECODE_NTH, G_PARAM_READWRITE)); gstelement_class->change_state = gst_dvdec_change_state; /* table initialization, only do once */ dv_init (0, 0); } static void gst_dvdec_init (GstDVDec * dvdec, GstDVDecClass * g_class) { dvdec->sinkpad = gst_pad_new_from_template (gst_static_pad_template_get (&sink_temp), "sink"); gst_pad_set_setcaps_function (dvdec->sinkpad, GST_DEBUG_FUNCPTR (gst_dvdec_sink_setcaps)); gst_pad_set_chain_function (dvdec->sinkpad, gst_dvdec_chain); gst_element_add_pad (GST_ELEMENT (dvdec), dvdec->sinkpad); dvdec->srcpad = gst_pad_new_from_template (gst_static_pad_template_get (&src_temp), "src"); gst_pad_use_fixed_caps (dvdec->srcpad); gst_element_add_pad (GST_ELEMENT (dvdec), dvdec->srcpad); dvdec->framerate_numerator = 0; dvdec->framerate_denominator = 0; dvdec->height = 0; dvdec->wide = FALSE; dvdec->drop_factor = 1; dvdec->clamp_luma = FALSE; dvdec->clamp_chroma = FALSE; dvdec->quality = DV_DEFAULT_QUALITY; } static gboolean gst_dvdec_sink_setcaps (GstPad * pad, GstCaps * caps) { GstDVDec *dvdec; GstStructure *s; GstCaps *othercaps; gboolean gotpar = FALSE; const GValue *par = NULL, *rate = NULL; dvdec = GST_DVDEC (gst_pad_get_parent (pad)); /* first parse the caps */ s = gst_caps_get_structure (caps, 0); if (!gst_structure_get_int (s, "height", &dvdec->height)) goto error; if ((par = gst_structure_get_value (s, "pixel-aspect-ratio"))) gotpar = TRUE; if (!(rate = gst_structure_get_value (s, "framerate"))) goto error; dvdec->framerate_numerator = gst_value_get_fraction_numerator (rate); dvdec->framerate_denominator = gst_value_get_fraction_denominator (rate); /* ignoring rgb, bgr0 for now */ dvdec->bpp = 2; othercaps = gst_caps_new_simple ("video/x-raw-yuv", "format", GST_TYPE_FOURCC, GST_STR_FOURCC ("YUY2"), "width", G_TYPE_INT, 720, "height", G_TYPE_INT, dvdec->height, "framerate", GST_TYPE_FRACTION, dvdec->framerate_numerator, dvdec->framerate_denominator, NULL); if (gotpar) gst_structure_set_value (gst_caps_get_structure (othercaps, 0), "pixel-aspect-ratio", par); gst_pad_set_caps (dvdec->srcpad, othercaps); gst_caps_unref (othercaps); gst_object_unref (dvdec); return TRUE; error: { gst_object_unref (dvdec); return FALSE; } } static GstFlowReturn gst_dvdec_chain (GstPad * pad, GstBuffer * buf) { GstDVDec *dvdec; guint8 *inframe; guint8 *outframe; guint8 *outframe_ptrs[3]; gint outframe_pitches[3]; GstBuffer *outbuf; GstFlowReturn ret = GST_FLOW_OK; guint length; dvdec = GST_DVDEC (gst_pad_get_parent (pad)); inframe = GST_BUFFER_DATA (buf); /* buffer should be at least the size of one NTSC frame, this should * be enough to decode the header. */ if (G_UNLIKELY (GST_BUFFER_SIZE (buf) < NTSC_BUFFER)) goto wrong_size; if (G_UNLIKELY (dv_parse_header (dvdec->decoder, inframe) < 0)) goto parse_header_error; /* check the buffer is of right size after we know if we are * dealing with PAL or NTSC */ length = (dvdec->PAL ? PAL_BUFFER : NTSC_BUFFER); if (G_UNLIKELY (GST_BUFFER_SIZE (buf) < length)) goto wrong_size; dv_parse_packs (dvdec->decoder, inframe); if (dvdec->video_offset % dvdec->drop_factor != 0) goto skip; ret = gst_pad_alloc_buffer_and_set_caps (dvdec->srcpad, 0, (720 * dvdec->height) * dvdec->bpp, GST_PAD_CAPS (dvdec->srcpad), &outbuf); if (G_UNLIKELY (ret != GST_FLOW_OK)) goto no_buffer; outframe = GST_BUFFER_DATA (outbuf); outframe_ptrs[0] = outframe; outframe_pitches[0] = 720 * dvdec->bpp; /* the rest only matters for YUY2 */ if (dvdec->bpp < 3) { outframe_ptrs[1] = outframe_ptrs[0] + 720 * dvdec->height; outframe_ptrs[2] = outframe_ptrs[1] + 360 * dvdec->height; outframe_pitches[1] = dvdec->height / 2; outframe_pitches[2] = outframe_pitches[1]; } GST_DEBUG_OBJECT (dvdec, "decoding and pushing buffer"); dv_decode_full_frame (dvdec->decoder, inframe, e_dv_color_yuv, outframe_ptrs, outframe_pitches); gst_buffer_stamp (outbuf, buf); ret = gst_pad_push (dvdec->srcpad, outbuf); skip: dvdec->video_offset++; done: gst_buffer_unref (buf); gst_object_unref (dvdec); return ret; /* ERRORS */ wrong_size: { GST_ELEMENT_ERROR (dvdec, STREAM, DECODE, (NULL), ("Input buffer too small")); ret = GST_FLOW_ERROR; goto done; } parse_header_error: { GST_ELEMENT_ERROR (dvdec, STREAM, DECODE, (NULL), ("Error parsing DV header")); ret = GST_FLOW_ERROR; goto done; } no_buffer: { GST_DEBUG_OBJECT (dvdec, "could not allocate buffer"); goto done; } } static GstStateChangeReturn gst_dvdec_change_state (GstElement * element, GstStateChange transition) { GstDVDec *dvdec = GST_DVDEC (element); GstStateChangeReturn ret; switch (transition) { case GST_STATE_CHANGE_NULL_TO_READY: break; case GST_STATE_CHANGE_READY_TO_PAUSED: dvdec->decoder = dv_decoder_new (0, dvdec->clamp_luma, dvdec->clamp_chroma); dvdec->decoder->quality = qualities[dvdec->quality]; dv_set_error_log (dvdec->decoder, NULL); /* * Enable this function call when libdv2 0.100 or higher is more * common */ /* dv_set_quality (dvdec->decoder, qualities [dvdec->quality]); */ break; case GST_STATE_CHANGE_PAUSED_TO_PLAYING: break; default: break; } ret = parent_class->change_state (element, transition); switch (transition) { case GST_STATE_CHANGE_PLAYING_TO_PAUSED: break; case GST_STATE_CHANGE_PAUSED_TO_READY: dv_decoder_free (dvdec->decoder); dvdec->decoder = NULL; break; case GST_STATE_CHANGE_READY_TO_NULL: break; default: break; } return ret; } static void gst_dvdec_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstDVDec *dvdec = GST_DVDEC (object); switch (prop_id) { case PROP_CLAMP_LUMA: dvdec->clamp_luma = g_value_get_boolean (value); break; case PROP_CLAMP_CHROMA: dvdec->clamp_chroma = g_value_get_boolean (value); break; case PROP_QUALITY: dvdec->quality = g_value_get_enum (value); if ((dvdec->quality < 0) || (dvdec->quality > 5)) dvdec->quality = 0; break; case PROP_DECODE_NTH: dvdec->drop_factor = g_value_get_int (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_dvdec_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstDVDec *dvdec = GST_DVDEC (object); switch (prop_id) { case PROP_CLAMP_LUMA: g_value_set_boolean (value, dvdec->clamp_luma); break; case PROP_CLAMP_CHROMA: g_value_set_boolean (value, dvdec->clamp_chroma); break; case PROP_QUALITY: g_value_set_enum (value, dvdec->quality); break; case PROP_DECODE_NTH: g_value_set_int (value, dvdec->drop_factor); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } }