gstreamer/ext/dv/gstdvdec.c
Sebastian Dröge 83d5797a58 dv: Use correct pixel-aspect-ratio values
The previous ones resulted in odd display aspect ratios and were different
from the ones used by e.g. ffmpeg. The new ones now result in display aspect
ratios of 4:3 and 16:9.

https://bugzilla.gnome.org/show_bug.cgi?id=765946
2016-05-05 13:37:27 +03:00

680 lines
19 KiB
C

/* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, 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-1.0 filesrc location=test.dv ! dvdemux name=demux ! dvdec ! xvimagesink
* ]| This pipeline decodes and renders the raw DV stream to a videosink.
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <math.h>
#include <gst/video/video.h>
#include <gst/video/gstvideometa.h>
#include <gst/video/gstvideopool.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 16
#define PAL_NORMAL_PAR_Y 15
#define PAL_WIDE_PAR_X 64
#define PAL_WIDE_PAR_Y 45
#define NTSC_NORMAL_PAR_X 8
#define NTSC_NORMAL_PAR_Y 9
#define NTSC_WIDE_PAR_X 32
#define NTSC_WIDE_PAR_Y 27
#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, "
"format = (string) { YUY2, BGRx, RGB }, "
"framerate = (fraction) [ 1/1, 60/1 ], "
"width = (int) 720, " "height = (int) { 576, 480 }")
);
#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;
}
#define gst_dvdec_parent_class parent_class
G_DEFINE_TYPE (GstDVDec, gst_dvdec, GST_TYPE_ELEMENT);
static GstFlowReturn gst_dvdec_chain (GstPad * pad, GstObject * parent,
GstBuffer * buffer);
static gboolean gst_dvdec_sink_event (GstPad * pad, GstObject * parent,
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_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_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_DEBUG_FUNCPTR (gst_dvdec_change_state);
gst_element_class_add_static_pad_template (gstelement_class, &sink_temp);
gst_element_class_add_static_pad_template (gstelement_class, &src_temp);
gst_element_class_set_static_metadata (gstelement_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_init (GstDVDec * dvdec)
{
dvdec->sinkpad = gst_pad_new_from_static_template (&sink_temp, "sink");
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;
}
static gboolean
gst_dvdec_sink_setcaps (GstDVDec * dvdec, GstCaps * caps)
{
GstStructure *s;
const GValue *par = NULL, *rate = NULL;
/* 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;
return TRUE;
/* ERRORS */
no_framerate:
{
GST_DEBUG_OBJECT (dvdec, "no framerate specified in caps");
return FALSE;
}
}
static void
gst_dvdec_negotiate_pool (GstDVDec * dec, GstCaps * caps, GstVideoInfo * info)
{
GstQuery *query;
GstBufferPool *pool;
guint size, min, max;
GstStructure *config;
/* find a pool for the negotiated caps now */
query = gst_query_new_allocation (caps, TRUE);
if (!gst_pad_peer_query (dec->srcpad, query)) {
GST_DEBUG_OBJECT (dec, "didn't get downstream ALLOCATION hints");
}
if (gst_query_get_n_allocation_pools (query) > 0) {
/* we got configuration from our peer, parse them */
gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max);
size = MAX (size, info->size);
} else {
pool = NULL;
size = info->size;
min = max = 0;
}
if (pool == NULL) {
/* we did not get a pool, make one ourselves then */
pool = gst_video_buffer_pool_new ();
}
if (dec->pool) {
gst_buffer_pool_set_active (dec->pool, FALSE);
gst_object_unref (dec->pool);
}
dec->pool = pool;
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_set_params (config, caps, size, min, max);
if (gst_query_find_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL)) {
/* just set the option, if the pool can support it we will transparently use
* it through the video info API. We could also see if the pool support this
* option and only activate it then. */
gst_buffer_pool_config_add_option (config,
GST_BUFFER_POOL_OPTION_VIDEO_META);
}
gst_buffer_pool_set_config (pool, config);
/* and activate */
gst_buffer_pool_set_active (pool, TRUE);
gst_query_unref (query);
}
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;
gst_video_info_set_format (&dvdec->vinfo, GST_VIDEO_FORMAT_YUY2,
720, dvdec->height);
dvdec->vinfo.fps_n = dvdec->framerate_numerator;
dvdec->vinfo.fps_d = dvdec->framerate_denominator;
dvdec->vinfo.par_n = dvdec->par_x;
dvdec->vinfo.par_d = dvdec->par_y;
if (dvdec->interlaced) {
dvdec->vinfo.interlace_mode = GST_VIDEO_INTERLACE_MODE_INTERLEAVED;
} else {
dvdec->vinfo.interlace_mode = GST_VIDEO_INTERLACE_MODE_PROGRESSIVE;
}
othercaps = gst_video_info_to_caps (&dvdec->vinfo);
gst_pad_set_caps (dvdec->srcpad, othercaps);
gst_dvdec_negotiate_pool (dvdec, othercaps, &dvdec->vinfo);
gst_caps_unref (othercaps);
dvdec->src_negotiated = TRUE;
return TRUE;
}
static gboolean
gst_dvdec_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstDVDec *dvdec;
gboolean res = TRUE;
dvdec = GST_DVDEC (parent);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_STOP:
gst_segment_init (&dvdec->segment, GST_FORMAT_UNDEFINED);
dvdec->need_segment = FALSE;
break;
case GST_EVENT_SEGMENT:{
const GstSegment *segment;
gst_event_parse_segment (event, &segment);
GST_DEBUG_OBJECT (dvdec, "Got SEGMENT %" GST_SEGMENT_FORMAT, &segment);
gst_segment_copy_into (segment, &dvdec->segment);
if (!gst_pad_has_current_caps (dvdec->srcpad)) {
dvdec->need_segment = TRUE;
gst_event_unref (event);
event = NULL;
res = TRUE;
} else {
dvdec->need_segment = FALSE;
}
break;
}
case GST_EVENT_CAPS:
{
GstCaps *caps;
gst_event_parse_caps (event, &caps);
res = gst_dvdec_sink_setcaps (dvdec, caps);
gst_event_unref (event);
event = NULL;
break;
}
default:
break;
}
if (event)
res = gst_pad_push_event (dvdec->srcpad, event);
return res;
}
static GstFlowReturn
gst_dvdec_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
{
GstDVDec *dvdec;
guint8 *inframe;
guint8 *outframe_ptrs[3];
gint outframe_pitches[3];
GstMapInfo map;
GstVideoFrame frame;
GstBuffer *outbuf;
GstFlowReturn ret = GST_FLOW_OK;
guint length;
guint64 cstart = GST_CLOCK_TIME_NONE, cstop = GST_CLOCK_TIME_NONE;
gboolean PAL, wide;
dvdec = GST_DVDEC (parent);
gst_buffer_map (buf, &map, GST_MAP_READ);
inframe = map.data;
/* buffer should be at least the size of one NTSC frame, this should
* be enough to decode the header. */
if (G_UNLIKELY (map.size < 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 (map.size < 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;
}
if (gst_pad_check_reconfigure (dvdec->srcpad)) {
GstCaps *caps;
caps = gst_pad_get_current_caps (dvdec->srcpad);
if (!caps)
goto not_negotiated;
gst_dvdec_negotiate_pool (dvdec, caps, &dvdec->vinfo);
gst_caps_unref (caps);
}
if (dvdec->need_segment) {
gst_pad_push_event (dvdec->srcpad, gst_event_new_segment (&dvdec->segment));
dvdec->need_segment = FALSE;
}
ret = gst_buffer_pool_acquire_buffer (dvdec->pool, &outbuf, NULL);
if (G_UNLIKELY (ret != GST_FLOW_OK))
goto no_buffer;
gst_video_frame_map (&frame, &dvdec->vinfo, outbuf, GST_MAP_WRITE);
outframe_ptrs[0] = GST_VIDEO_FRAME_COMP_DATA (&frame, 0);
outframe_pitches[0] = GST_VIDEO_FRAME_COMP_STRIDE (&frame, 0);
/* the rest only matters for YUY2 */
if (dvdec->bpp < 3) {
outframe_ptrs[1] = GST_VIDEO_FRAME_COMP_DATA (&frame, 1);
outframe_ptrs[2] = GST_VIDEO_FRAME_COMP_DATA (&frame, 2);
outframe_pitches[1] = GST_VIDEO_FRAME_COMP_STRIDE (&frame, 1);
outframe_pitches[2] = GST_VIDEO_FRAME_COMP_STRIDE (&frame, 2);
}
GST_DEBUG_OBJECT (dvdec, "decoding and pushing buffer");
dv_decode_full_frame (dvdec->decoder, inframe,
e_dv_color_yuv, outframe_ptrs, outframe_pitches);
gst_video_frame_unmap (&frame);
GST_BUFFER_FLAG_UNSET (outbuf, GST_VIDEO_BUFFER_FLAG_TFF);
GST_BUFFER_OFFSET (outbuf) = GST_BUFFER_OFFSET (buf);
GST_BUFFER_OFFSET_END (outbuf) = GST_BUFFER_OFFSET_END (buf);
/* FIXME : Compute values when using non-TIME segments,
* but for the moment make sure we at least don't set bogus values
*/
if (GST_CLOCK_TIME_IS_VALID (cstart)) {
GST_BUFFER_TIMESTAMP (outbuf) = cstart;
if (GST_CLOCK_TIME_IS_VALID (cstop))
GST_BUFFER_DURATION (outbuf) = cstop - cstart;
}
ret = gst_pad_push (dvdec->srcpad, outbuf);
skip:
dvdec->video_offset++;
done:
gst_buffer_unmap (buf, &map);
gst_buffer_unref (buf);
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_video_info_init (&dvdec->vinfo);
gst_segment_init (&dvdec->segment, GST_FORMAT_UNDEFINED);
dvdec->src_negotiated = FALSE;
dvdec->sink_negotiated = FALSE;
dvdec->need_segment = 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 = GST_ELEMENT_CLASS (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;
if (dvdec->pool) {
gst_buffer_pool_set_active (dvdec->pool, FALSE);
gst_object_unref (dvdec->pool);
dvdec->pool = 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;
}
}