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gstreamer/ext/dv/gstdvdec.c

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* <2005> Wim Taymans <wim@fluendo.com>
*
* 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 #GstDVDec:drop-factor
* property. Setting this property to a value N > 1 will only decode every
* Nth frame.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch filesrc location=test.dv ! dvdemux name=demux ! dvdec ! xvimagesink
* ]| This pipeline decodes and renders the raw DV stream to a videosink.
* </refsect2>
*
* Last reviewed on 2006-02-28 (0.10.3)
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <math.h>
#include <gst/video/video.h>
#include "gstdvdec.h"
/* sizes of one input buffer */
#define NTSC_HEIGHT 480
#define NTSC_BUFFER 120000
#define NTSC_FRAMERATE_NUMERATOR 30000
#define NTSC_FRAMERATE_DENOMINATOR 1001
#define PAL_HEIGHT 576
#define PAL_BUFFER 144000
#define PAL_FRAMERATE_NUMERATOR 25
#define PAL_FRAMERATE_DENOMINATOR 1
#define PAL_NORMAL_PAR_X 59
#define PAL_NORMAL_PAR_Y 54
#define PAL_WIDE_PAR_X 118
#define PAL_WIDE_PAR_Y 81
#define NTSC_NORMAL_PAR_X 10
#define NTSC_NORMAL_PAR_Y 11
#define NTSC_WIDE_PAR_X 40
#define NTSC_WIDE_PAR_Y 33
#define DV_DEFAULT_QUALITY DV_QUALITY_BEST
#define DV_DEFAULT_DECODE_NTH 1
GST_DEBUG_CATEGORY_STATIC (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())
static 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 void gst_dvdec_finalize (GObject * object);
static gboolean gst_dvdec_sink_setcaps (GstPad * pad, GstCaps * caps);
static GstFlowReturn gst_dvdec_chain (GstPad * pad, GstBuffer * buffer);
static gboolean gst_dvdec_sink_event (GstPad * pad, GstEvent * event);
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_simple (element_class, "DV video decoder",
"Codec/Decoder/Video",
"Uses libdv to decode DV video (smpte314) (libdv.sourceforge.net)",
"Erik Walthinsen <omega@cse.ogi.edu>," "Wim Taymans <wim@fluendo.com>");
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->finalize = gst_dvdec_finalize;
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_PARAM_STATIC_STRINGS));
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_PARAM_STATIC_STRINGS));
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_PARAM_STATIC_STRINGS));
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 | G_PARAM_STATIC_STRINGS));
gstelement_class->change_state = gst_dvdec_change_state;
}
static void
gst_dvdec_init (GstDVDec * dvdec, GstDVDecClass * g_class)
{
dvdec->sinkpad = gst_pad_new_from_static_template (&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_pad_set_event_function (dvdec->sinkpad, gst_dvdec_sink_event);
gst_element_add_pad (GST_ELEMENT (dvdec), dvdec->sinkpad);
dvdec->srcpad = gst_pad_new_from_static_template (&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->wide = FALSE;
dvdec->drop_factor = 1;
dvdec->clamp_luma = FALSE;
dvdec->clamp_chroma = FALSE;
dvdec->quality = DV_DEFAULT_QUALITY;
dvdec->segment = gst_segment_new ();
}
static void
gst_dvdec_finalize (GObject * object)
{
GstDVDec *dvdec = GST_DVDEC (object);
gst_segment_free (dvdec->segment);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
gst_dvdec_sink_setcaps (GstPad * pad, GstCaps * caps)
{
GstDVDec *dvdec;
GstStructure *s;
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);
/* we allow framerate and PAR to be overwritten. framerate is mandatory. */
if (!(rate = gst_structure_get_value (s, "framerate")))
goto no_framerate;
par = gst_structure_get_value (s, "pixel-aspect-ratio");
if (par) {
dvdec->par_x = gst_value_get_fraction_numerator (par);
dvdec->par_y = gst_value_get_fraction_denominator (par);
dvdec->need_par = FALSE;
} else {
dvdec->par_x = 0;
dvdec->par_y = 0;
dvdec->need_par = TRUE;
}
dvdec->framerate_numerator = gst_value_get_fraction_numerator (rate);
dvdec->framerate_denominator = gst_value_get_fraction_denominator (rate);
dvdec->sink_negotiated = TRUE;
dvdec->src_negotiated = FALSE;
gst_object_unref (dvdec);
return TRUE;
/* ERRORS */
no_framerate:
{
GST_DEBUG_OBJECT (dvdec, "no framerate specified in caps");
gst_object_unref (dvdec);
return FALSE;
}
}
static gboolean
gst_dvdec_src_negotiate (GstDVDec * dvdec)
{
GstCaps *othercaps;
/* no PAR was specified in input, derive from encoded data */
if (dvdec->need_par) {
if (dvdec->PAL) {
if (dvdec->wide) {
dvdec->par_x = PAL_WIDE_PAR_X;
dvdec->par_y = PAL_WIDE_PAR_Y;
} else {
dvdec->par_x = PAL_NORMAL_PAR_X;
dvdec->par_y = PAL_NORMAL_PAR_Y;
}
} else {
if (dvdec->wide) {
dvdec->par_x = NTSC_WIDE_PAR_X;
dvdec->par_y = NTSC_WIDE_PAR_Y;
} else {
dvdec->par_x = NTSC_NORMAL_PAR_X;
dvdec->par_y = NTSC_NORMAL_PAR_Y;
}
}
GST_DEBUG_OBJECT (dvdec, "Inferred PAR %d/%d from video format",
dvdec->par_x, dvdec->par_y);
}
/* 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,
"pixel-aspect-ratio", GST_TYPE_FRACTION, dvdec->par_x,
dvdec->par_y, "interlaced", G_TYPE_BOOLEAN, dvdec->interlaced, NULL);
gst_pad_set_caps (dvdec->srcpad, othercaps);
gst_caps_unref (othercaps);
dvdec->src_negotiated = TRUE;
return TRUE;
}
static gboolean
gst_dvdec_sink_event (GstPad * pad, GstEvent * event)
{
GstDVDec *dvdec;
gboolean res = TRUE;
dvdec = GST_DVDEC (gst_pad_get_parent (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_STOP:
gst_segment_init (dvdec->segment, GST_FORMAT_UNDEFINED);
break;
case GST_EVENT_NEWSEGMENT:{
gboolean update;
gdouble rate, applied_rate;
GstFormat format;
gint64 start, stop, position;
gst_event_parse_new_segment_full (event, &update, &rate, &applied_rate,
&format, &start, &stop, &position);
GST_DEBUG_OBJECT (dvdec, "Got NEWSEGMENT [%" GST_TIME_FORMAT
" - %" GST_TIME_FORMAT " / %" GST_TIME_FORMAT "]",
GST_TIME_ARGS (start), GST_TIME_ARGS (stop),
GST_TIME_ARGS (position));
gst_segment_set_newsegment_full (dvdec->segment, update, rate,
applied_rate, format, start, stop, position);
break;
}
default:
break;
}
res = gst_pad_push_event (dvdec->srcpad, event);
return res;
}
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;
gint64 cstart, cstop;
gboolean PAL, wide;
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;
/* preliminary dropping. unref and return if outside of configured segment */
if ((dvdec->segment->format == GST_FORMAT_TIME) &&
(!(gst_segment_clip (dvdec->segment, GST_FORMAT_TIME,
GST_BUFFER_TIMESTAMP (buf),
GST_BUFFER_TIMESTAMP (buf) + GST_BUFFER_DURATION (buf),
&cstart, &cstop))))
goto dropping;
if (G_UNLIKELY (dv_parse_header (dvdec->decoder, inframe) < 0))
goto parse_header_error;
/* get size */
PAL = dv_system_50_fields (dvdec->decoder);
wide = dv_format_wide (dvdec->decoder);
/* check the buffer is of right size after we know if we are
* dealing with PAL or NTSC */
length = (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;
/* renegotiate on change */
if (PAL != dvdec->PAL || wide != dvdec->wide) {
dvdec->src_negotiated = FALSE;
dvdec->PAL = PAL;
dvdec->wide = wide;
}
dvdec->height = (dvdec->PAL ? PAL_HEIGHT : NTSC_HEIGHT);
dvdec->interlaced = !dv_is_progressive (dvdec->decoder);
/* negotiate if not done yet */
if (!dvdec->src_negotiated) {
if (!gst_dvdec_src_negotiate (dvdec))
goto not_negotiated;
}
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_FLAG_UNSET (outbuf, GST_VIDEO_BUFFER_TFF);
GST_BUFFER_OFFSET (outbuf) = GST_BUFFER_OFFSET (buf);
GST_BUFFER_OFFSET_END (outbuf) = GST_BUFFER_OFFSET_END (buf);
GST_BUFFER_TIMESTAMP (outbuf) = cstart;
GST_BUFFER_DURATION (outbuf) = cstop - cstart;
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;
}
not_negotiated:
{
GST_DEBUG_OBJECT (dvdec, "could not negotiate output");
ret = GST_FLOW_NOT_NEGOTIATED;
goto done;
}
no_buffer:
{
GST_DEBUG_OBJECT (dvdec, "could not allocate buffer");
goto done;
}
dropping:
{
GST_DEBUG_OBJECT (dvdec,
"dropping buffer since it's out of the configured segment");
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);
gst_segment_init (dvdec->segment, GST_FORMAT_UNDEFINED);
dvdec->src_negotiated = FALSE;
dvdec->sink_negotiated = FALSE;
/*
* 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;
}
}
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