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gstreamer/ext/dv/gstdvdec.c
David Schleef 322baf19c8 Add buffer length checks to every typefinding function 
Original commit message from CVS:
Add buffer length checks to every typefinding function
2003-07-24 08:49:42 +00:00

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
/* First, include the header file for the plugin, to bring in the
* object definition and other useful things.
*/
#include "gstdvdec.h"
#define NTSC_HEIGHT 480
#define NTSC_BUFFER 120000
#define PAL_HEIGHT 576
#define PAL_BUFFER 144000
/* The ElementDetails structure gives a human-readable description
* of the plugin, as well as author and version data.
*/
static GstElementDetails dvdec_details = {
"DV (smpte314) decoder plugin",
"Codec/Video/Decoder",
"LGPL",
"Uses libdv to decode DV video (libdv.sourceforge.net)",
VERSION,
"Erik Walthinsen <omega@cse.ogi.edu>\n"
"Wim Taymans <wim.taymans@tvd.be>",
"(C) 2001-2002",
};
/* These are the signals that this element can fire. They are zero-
* based because the numbers themselves are private to the object.
* LAST_SIGNAL is used for initialization of the signal array.
*/
enum {
/* FILL ME */
LAST_SIGNAL
};
/* Arguments are identified the same way, but cannot be zero, so you
* must leave the ARG_0 entry in as a placeholder.
*/
enum {
ARG_0,
ARG_CLAMP_LUMA,
ARG_CLAMP_CHROMA,
ARG_QUALITY,
/* FILL ME */
};
/* The PadFactory structures describe what pads the element has or
* can have. They can be quite complex, but for this dvdec plugin
* they are rather simple.
*/
GST_PAD_TEMPLATE_FACTORY (sink_temp,
"sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_CAPS_NEW (
"dv_dec_sink",
"video/x-dv",
"systemstream", GST_PROPS_BOOLEAN (TRUE)
)
)
GST_PAD_TEMPLATE_FACTORY (video_src_temp,
"video",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_CAPS_NEW (
"dv_dec_src",
"video/x-raw-yuv",
"format", GST_PROPS_FOURCC (GST_MAKE_FOURCC ('Y','U','Y','2')),
"width", GST_PROPS_INT (720),
"height", GST_PROPS_LIST (
GST_PROPS_INT (NTSC_HEIGHT),
GST_PROPS_INT (PAL_HEIGHT)
),
"framerate", GST_PROPS_LIST (
GST_PROPS_FLOAT (25.),
GST_PROPS_FLOAT (30/1.001)
)
),
GST_CAPS_NEW (
"dv_dec_src",
"video/x-raw-rgb",
"bpp", GST_PROPS_INT(32),
"depth", GST_PROPS_INT(32),
"endianness", GST_PROPS_INT (G_BIG_ENDIAN),
"red_mask", GST_PROPS_INT(0x000000ff),
"green_mask", GST_PROPS_INT(0x0000ff00),
"blue_mask", GST_PROPS_INT(0x00ff0000),
"width", GST_PROPS_INT (720),
"height", GST_PROPS_LIST (
GST_PROPS_INT (NTSC_HEIGHT),
GST_PROPS_INT (PAL_HEIGHT)
),
"framerate", GST_PROPS_LIST (
GST_PROPS_FLOAT (25.),
GST_PROPS_FLOAT (30/1.001)
)
),
GST_CAPS_NEW (
"dv_dec_src",
"video/x-raw-rgb",
"bpp", GST_PROPS_INT(24),
"depth", GST_PROPS_INT(24),
"endianness", GST_PROPS_INT (G_BIG_ENDIAN),
"red_mask", GST_PROPS_INT(0x0000ff),
"green_mask", GST_PROPS_INT(0x00ff00),
"blue_mask", GST_PROPS_INT(0xff0000),
"width", GST_PROPS_INT (720),
"height", GST_PROPS_LIST (
GST_PROPS_INT (NTSC_HEIGHT),
GST_PROPS_INT (PAL_HEIGHT)
),
"framerate", GST_PROPS_LIST (
GST_PROPS_FLOAT (25.),
GST_PROPS_FLOAT (30/1.001)
)
)
)
GST_PAD_TEMPLATE_FACTORY ( audio_src_temp,
"audio",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_CAPS_NEW (
"arts_sample",
"audio/x-raw-int",
"depth", GST_PROPS_INT (16),
"width", GST_PROPS_INT (16),
"signed", GST_PROPS_BOOLEAN (TRUE),
"channels", GST_PROPS_INT (2),
"endianness", GST_PROPS_INT (G_LITTLE_ENDIAN),
"rate", GST_PROPS_INT_RANGE (4000, 48000)
)
)
/* typefind stuff */
static GstCaps*
dv_type_find (GstBuffer *buf, gpointer private)
{
guint32 head;
GstCaps *new = NULL;
if (GST_BUFFER_SIZE (buf) < 5)
return NULL;
head = GUINT32_FROM_BE(*((guint32 *)GST_BUFFER_DATA(buf)));
/* check for DIF and DV flag */
if ((head & 0xffffff00) == 0x1f070000 && !(GST_BUFFER_DATA(buf)[4] & 0x01)) {
gchar *format;
if ((head & 0x000000ff) & 0x80)
format = "PAL";
else
format = "NTSC";
new = GST_CAPS_NEW ("dv_type_find",
"video/x-dv",
"systemstream", GST_PROPS_BOOLEAN (TRUE)
);
}
return new;
}
static GstTypeDefinition dv_definition = {
"dv_video/dv", "video/x-dv", ".dv", dv_type_find
};
#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 GFlagsValue values[] = {
{ DV_QUALITY_COLOR, "DV_QUALITY_COLOR", "Color or monochrome decoding" },
{ DV_QUALITY_AC_1, "DV_QUALITY_AC_1", "AC 1 something" },
{ DV_QUALITY_AC_2, "DV_QUALITY_AC_2", "AC 2 something" },
{ 0, NULL, NULL }
};
qtype = g_flags_register_static ("GstDVDecQualityFlags", values);
}
return qtype;
}
/* A number of functon prototypes are given so we can refer to them later. */
static void gst_dvdec_class_init (GstDVDecClass *klass);
static void gst_dvdec_init (GstDVDec *dvdec);
static const GstQueryType*
gst_dvdec_get_src_query_types (GstPad *pad);
static gboolean gst_dvdec_src_query (GstPad *pad, GstQueryType type,
GstFormat *format, gint64 *value);
static const GstFormat* gst_dvdec_get_formats (GstPad *pad);
static gboolean gst_dvdec_sink_convert (GstPad *pad, GstFormat src_format, gint64 src_value,
GstFormat *dest_format, gint64 *dest_value);
static gboolean gst_dvdec_src_convert (GstPad *pad, GstFormat src_format, gint64 src_value,
GstFormat *dest_format, gint64 *dest_value);
static const GstEventMask*
gst_dvdec_get_event_masks (GstPad *pad);
static gboolean gst_dvdec_handle_src_event (GstPad *pad, GstEvent *event);
static void gst_dvdec_loop (GstElement *element);
static GstElementStateReturn
gst_dvdec_change_state (GstElement *element);
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);
/* The parent class pointer needs to be kept around for some object
* operations.
*/
static GstElementClass *parent_class = NULL;
/* This array holds the ids of the signals registered for this object.
* The array indexes are based on the enum up above.
*/
/*static guint gst_dvdec_signals[LAST_SIGNAL] = { 0 }; */
/* This function is used to register and subsequently return the type
* identifier for this object class. On first invocation, it will
* register the type, providing the name of the class, struct sizes,
* and pointers to the various functions that define the class.
*/
GType
gst_dvdec_get_type (void)
{
static GType dvdec_type = 0;
if (!dvdec_type) {
static const GTypeInfo dvdec_info = {
sizeof (GstDVDecClass),
NULL,
NULL,
(GClassInitFunc) gst_dvdec_class_init,
NULL,
NULL,
sizeof (GstDVDec),
0,
(GInstanceInitFunc) gst_dvdec_init,
};
dvdec_type = g_type_register_static (GST_TYPE_ELEMENT, "GstDVDec", &dvdec_info, 0);
}
return dvdec_type;
}
/* In order to create an instance of an object, the class must be
* initialized by this function. GObject will take care of running
* it, based on the pointer to the function provided above.
*/
static void
gst_dvdec_class_init (GstDVDecClass *klass)
{
/* Class pointers are needed to supply pointers to the private
* implementations of parent class methods.
*/
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
/* Since the dvdec class contains the parent classes, you can simply
* cast the pointer to get access to the parent classes.
*/
gobject_class = (GObjectClass*) klass;
gstelement_class = (GstElementClass*) klass;
/* The parent class is needed for class method overrides. */
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_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), ARG_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), ARG_QUALITY,
g_param_spec_flags ("quality", "Quality", "Decoding quality",
GST_TYPE_DVDEC_QUALITY, DV_QUALITY_BEST, G_PARAM_READWRITE));
gobject_class->set_property = gst_dvdec_set_property;
gobject_class->get_property = gst_dvdec_get_property;
gstelement_class->change_state = gst_dvdec_change_state;
/* table initialization, only do once */
dv_init(0, 0);
}
/* This function is responsible for initializing a specific instance of
* the plugin.
*/
static void
gst_dvdec_init(GstDVDec *dvdec)
{
gint i;
dvdec->sinkpad = gst_pad_new_from_template (GST_PAD_TEMPLATE_GET (sink_temp), "sink");
gst_element_add_pad (GST_ELEMENT (dvdec), dvdec->sinkpad);
gst_pad_set_query_function (dvdec->sinkpad, NULL);
gst_pad_set_convert_function (dvdec->sinkpad, GST_DEBUG_FUNCPTR (gst_dvdec_sink_convert));
gst_pad_set_formats_function (dvdec->sinkpad, GST_DEBUG_FUNCPTR (gst_dvdec_get_formats));
dvdec->videosrcpad = gst_pad_new_from_template (GST_PAD_TEMPLATE_GET (video_src_temp), "video");
gst_element_add_pad (GST_ELEMENT (dvdec), dvdec->videosrcpad);
gst_pad_set_query_function (dvdec->videosrcpad, GST_DEBUG_FUNCPTR (gst_dvdec_src_query));
gst_pad_set_query_type_function (dvdec->videosrcpad, GST_DEBUG_FUNCPTR (gst_dvdec_get_src_query_types));
gst_pad_set_event_function (dvdec->videosrcpad, GST_DEBUG_FUNCPTR (gst_dvdec_handle_src_event));
gst_pad_set_event_mask_function (dvdec->videosrcpad, GST_DEBUG_FUNCPTR (gst_dvdec_get_event_masks));
gst_pad_set_convert_function (dvdec->videosrcpad, GST_DEBUG_FUNCPTR (gst_dvdec_src_convert));
gst_pad_set_formats_function (dvdec->videosrcpad, GST_DEBUG_FUNCPTR (gst_dvdec_get_formats));
dvdec->audiosrcpad = gst_pad_new_from_template (GST_PAD_TEMPLATE_GET(audio_src_temp), "audio");
gst_element_add_pad(GST_ELEMENT(dvdec),dvdec->audiosrcpad);
gst_pad_set_query_function (dvdec->audiosrcpad, GST_DEBUG_FUNCPTR (gst_dvdec_src_query));
gst_pad_set_query_type_function (dvdec->audiosrcpad, GST_DEBUG_FUNCPTR (gst_dvdec_get_src_query_types));
gst_pad_set_event_function (dvdec->audiosrcpad, GST_DEBUG_FUNCPTR (gst_dvdec_handle_src_event));
gst_pad_set_event_mask_function (dvdec->audiosrcpad, GST_DEBUG_FUNCPTR (gst_dvdec_get_event_masks));
gst_pad_set_convert_function (dvdec->audiosrcpad, GST_DEBUG_FUNCPTR (gst_dvdec_src_convert));
gst_pad_set_formats_function (dvdec->audiosrcpad, GST_DEBUG_FUNCPTR (gst_dvdec_get_formats));
gst_element_set_loop_function (GST_ELEMENT (dvdec), gst_dvdec_loop);
dvdec->pool = NULL;
dvdec->length = 0;
dvdec->next_ts = 0LL;
dvdec->end_position = -1LL;
dvdec->need_discont = FALSE;
dvdec->framerate = 0;
dvdec->height = 0;
dvdec->clamp_luma = FALSE;
dvdec->clamp_chroma = FALSE;
dvdec->quality = DV_QUALITY_BEST;
dvdec->loop = FALSE;
for (i = 0; i <4; i++) {
dvdec->audio_buffers[i] = (gint16 *)g_malloc (DV_AUDIO_MAX_SAMPLES * sizeof (gint16));
}
}
static const GstFormat*
gst_dvdec_get_formats (GstPad *pad)
{
static const GstFormat src_formats[] = {
GST_FORMAT_BYTES,
GST_FORMAT_DEFAULT,
GST_FORMAT_TIME,
0
};
static const GstFormat sink_formats[] = {
GST_FORMAT_BYTES,
GST_FORMAT_TIME,
0
};
return (GST_PAD_IS_SRC (pad) ? src_formats : sink_formats);
}
static gboolean
gst_dvdec_src_convert (GstPad *pad, GstFormat src_format, gint64 src_value,
GstFormat *dest_format, gint64 *dest_value)
{
gboolean res = TRUE;
GstDVDec *dvdec;
gint scale = 1;
dvdec = GST_DVDEC (gst_pad_get_parent (pad));
if (dvdec->length == 0)
return FALSE;
if (dvdec->decoder == NULL)
return FALSE;
switch (src_format) {
case GST_FORMAT_BYTES:
switch (*dest_format) {
case GST_FORMAT_TIME:
default:
res = FALSE;
}
break;
case GST_FORMAT_TIME:
switch (*dest_format) {
case GST_FORMAT_BYTES:
if (pad == dvdec->videosrcpad)
scale = 720 * dvdec->height * dvdec->bpp;
else if (pad == dvdec->audiosrcpad)
scale = dvdec->decoder->audio->num_channels * 2;
/* fallthrough */
case GST_FORMAT_DEFAULT:
if (pad == dvdec->videosrcpad)
*dest_value = src_value * dvdec->framerate * scale / (GST_SECOND*100);
else if (pad == dvdec->audiosrcpad)
*dest_value = src_value * dvdec->decoder->audio->frequency * scale / GST_SECOND;
break;
default:
res = FALSE;
}
break;
default:
res = FALSE;
}
return res;
}
static gboolean
gst_dvdec_sink_convert (GstPad *pad, GstFormat src_format, gint64 src_value,
GstFormat *dest_format, gint64 *dest_value)
{
gboolean res = TRUE;
GstDVDec *dvdec;
dvdec = GST_DVDEC (gst_pad_get_parent (pad));
if (dvdec->length == 0)
return FALSE;
switch (src_format) {
case GST_FORMAT_BYTES:
switch (*dest_format) {
case GST_FORMAT_TIME:
{
guint64 frame;
/* get frame number */
frame = src_value / dvdec->length;
*dest_value = (frame * GST_SECOND * 100) / dvdec->framerate;
break;
}
default:
res = FALSE;
}
break;
case GST_FORMAT_TIME:
switch (*dest_format) {
case GST_FORMAT_BYTES:
{
guint64 frame;
/* calculate the frame */
frame = src_value * dvdec->framerate / (GST_SECOND*100);
/* calculate the offset */
*dest_value = frame * dvdec->length;
break;
}
default:
res = FALSE;
}
break;
default:
res = FALSE;
}
return res;
}
static const GstQueryType*
gst_dvdec_get_src_query_types (GstPad *pad)
{
static const GstQueryType src_query_types[] = {
GST_QUERY_TOTAL,
GST_QUERY_POSITION,
0
};
return src_query_types;
}
static gboolean
gst_dvdec_src_query (GstPad *pad, GstQueryType type,
GstFormat *format, gint64 *value)
{
gboolean res = TRUE;
GstDVDec *dvdec;
dvdec = GST_DVDEC (gst_pad_get_parent (pad));
switch (type) {
case GST_QUERY_TOTAL:
switch (*format) {
default:
{
guint64 len;
GstFormat tmp_format;
len = gst_bytestream_length (dvdec->bs);
tmp_format = GST_FORMAT_TIME;
if (len == -1 || !gst_pad_convert (dvdec->sinkpad,
GST_FORMAT_BYTES,
len,
&tmp_format, value))
{
return FALSE;
}
if (!gst_pad_convert (pad, GST_FORMAT_TIME, *value, format, value)) {
return FALSE;
}
break;
}
}
break;
case GST_QUERY_POSITION:
switch (*format) {
default:
res = gst_pad_convert (pad, GST_FORMAT_TIME, dvdec->next_ts, format, value);
break;
}
break;
default:
res = FALSE;
break;
}
return res;
}
static const GstEventMask*
gst_dvdec_get_event_masks (GstPad *pad)
{
static const GstEventMask src_event_masks[] = {
{ GST_EVENT_SEEK, GST_SEEK_METHOD_SET |
GST_SEEK_FLAG_FLUSH },
{ 0, }
};
static const GstEventMask sink_event_masks[] = {
{ GST_EVENT_EOS, 0 },
{ GST_EVENT_DISCONTINUOUS, 0 },
{ GST_EVENT_FLUSH, 0 },
{ 0, }
};
return (GST_PAD_IS_SRC (pad) ? src_event_masks : sink_event_masks);
}
static gboolean
gst_dvdec_handle_sink_event (GstDVDec *dvdec)
{
guint32 remaining;
GstEvent *event;
GstEventType type;
gst_bytestream_get_status (dvdec->bs, &remaining, &event);
type = event? GST_EVENT_TYPE (event) : GST_EVENT_UNKNOWN;
switch (type) {
case GST_EVENT_EOS:
gst_pad_event_default (dvdec->sinkpad, event);
return TRUE;
case GST_EVENT_FLUSH:
break;
case GST_EVENT_DISCONTINUOUS:
{
gint i;
gboolean found = FALSE;
GstFormat format;
format = GST_FORMAT_TIME;
/* try to get a timestamp from the discont formats */
for (i = 0; i < GST_EVENT_DISCONT_OFFSET_LEN(event); i++) {
if (gst_pad_convert (dvdec->sinkpad,
GST_EVENT_DISCONT_OFFSET(event,i).format,
GST_EVENT_DISCONT_OFFSET(event,i).value,
&format, &dvdec->next_ts))
{
found = TRUE;
break;
}
}
/* assume 0 then */
if (!found) {
dvdec->next_ts = 0LL;
}
dvdec->need_discont = TRUE;
break;
}
default:
g_warning ("unhandled event %d\n", type);
break;
}
gst_event_unref (event);
return TRUE;
}
static gboolean
gst_dvdec_handle_src_event (GstPad *pad, GstEvent *event)
{
gboolean res = TRUE;
GstDVDec *dvdec;
dvdec = GST_DVDEC (gst_pad_get_parent (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK_SEGMENT:
{
gint64 position;
GstFormat format;
/* first bring the format to time */
format = GST_FORMAT_TIME;
if (!gst_pad_convert (pad,
GST_EVENT_SEEK_FORMAT (event),
GST_EVENT_SEEK_ENDOFFSET (event),
&format, &position))
{
/* could not convert seek format to time offset */
res = FALSE;
break;
}
dvdec->end_position = position;
dvdec->loop = GST_EVENT_SEEK_TYPE (event) & GST_SEEK_FLAG_SEGMENT_LOOP;
}
case GST_EVENT_SEEK:
{
gint64 position;
GstFormat format;
/* first bring the format to time */
format = GST_FORMAT_TIME;
if (!gst_pad_convert (pad,
GST_EVENT_SEEK_FORMAT (event),
GST_EVENT_SEEK_OFFSET (event),
&format, &position))
{
/* could not convert seek format to time offset */
res = FALSE;
break;
}
dvdec->next_ts = position;
/* then try to figure out the byteoffset for this time */
format = GST_FORMAT_BYTES;
if (!gst_pad_convert (dvdec->sinkpad, GST_FORMAT_TIME, position,
&format, &position))
{
/* could not convert seek format to byte offset */
res = FALSE;
break;
}
/* seek to offset */
if (!gst_bytestream_seek (dvdec->bs, position, GST_SEEK_METHOD_SET)) {
res = FALSE;
}
if (GST_EVENT_TYPE (event) != GST_EVENT_SEEK_SEGMENT)
dvdec->end_position = -1;
break;
}
default:
res = FALSE;
break;
}
gst_event_unref (event);
return res;
}
static void
gst_dvdec_push (GstDVDec *dvdec, GstBuffer *outbuf, GstPad *pad, GstClockTime ts)
{
GST_BUFFER_TIMESTAMP (outbuf) = ts;
if (dvdec->need_discont) {
GstEvent *discont;
discont = gst_event_new_discontinuous (FALSE, GST_FORMAT_TIME, ts, NULL);
gst_pad_push (pad, GST_BUFFER (discont));
}
gst_pad_push (pad, outbuf);
if ((dvdec->end_position != -1) &&
(dvdec->next_ts >= dvdec->end_position)) {
if (dvdec->loop)
gst_pad_push (pad, GST_BUFFER(gst_event_new (GST_EVENT_SEGMENT_DONE)));
else
gst_pad_push (pad, GST_BUFFER(gst_event_new (GST_EVENT_EOS)));
}
}
static void
gst_dvdec_loop (GstElement *element)
{
GstDVDec *dvdec;
GstBuffer *buf, *outbuf;
guint8 *inframe;
gint height;
guint32 length, got_bytes;
GstFormat format;
guint64 ts;
gfloat fps;
dvdec = GST_DVDEC (element);
/* first read enough bytes to parse the header */
got_bytes = gst_bytestream_peek_bytes (dvdec->bs, &inframe, header_size);
if (got_bytes < header_size) {
gst_dvdec_handle_sink_event (dvdec);
return;
}
dv_parse_header (dvdec->decoder, inframe);
/* after parsing the header we know the size of the data */
dvdec->PAL = dv_system_50_fields (dvdec->decoder);
dvdec->framerate = (dvdec->PAL ? 2500 : 2997);
fps = (dvdec->PAL ? 25. : 30/1.001);
dvdec->height = height = (dvdec->PAL ? PAL_HEIGHT : NTSC_HEIGHT);
length = (dvdec->PAL ? PAL_BUFFER : NTSC_BUFFER);
if (length != dvdec->length) {
dvdec->length = length;
gst_bytestream_size_hint (dvdec->bs, length);
}
/* then read the read data */
got_bytes = gst_bytestream_read (dvdec->bs, &buf, length);
if (got_bytes < length) {
gst_dvdec_handle_sink_event (dvdec);
return;
}
/* if we did not negotiate yet, do it now */
if (!GST_PAD_CAPS (dvdec->videosrcpad)) {
GstCaps *allowed;
GstCaps *trylist;
/* we what we are allowed to do */
allowed = gst_pad_get_allowed_caps (dvdec->videosrcpad);
/* try to fix our height */
trylist = gst_caps_intersect (allowed, gst_caps_append (
GST_CAPS_NEW (
"dvdec_negotiate",
"video/x-raw-yuv",
"height", GST_PROPS_INT (height),
"framerate", GST_PROPS_FLOAT (fps)
), GST_CAPS_NEW (
"dvdec_negotiate",
"video/x-raw-rgb",
"height", GST_PROPS_INT (height),
"framerate", GST_PROPS_FLOAT (fps)
)));
/* prepare for looping */
trylist = gst_caps_normalize (trylist);
while (trylist) {
GstCaps *to_try = gst_caps_copy_1 (trylist);
/* try each format */
if (gst_pad_try_set_caps (dvdec->videosrcpad, to_try) > 0) {
guint32 fourcc;
/* it worked, try to find what it was again */
gst_caps_get_fourcc_int (to_try, "format", &fourcc);
if (fourcc == GST_STR_FOURCC ("RGB ")) {
gint bpp;
gst_caps_get_int (to_try, "bpp", &bpp);
if (bpp == 24) {
dvdec->space = e_dv_color_rgb;
dvdec->bpp = 3;
}
else {
dvdec->space = e_dv_color_bgr0;
dvdec->bpp = 4;
}
}
else {
dvdec->space = e_dv_color_yuv;
dvdec->bpp = 2;
}
break;
}
trylist = trylist->next;
}
/* oops list exhausted an nothing was found... */
if (!trylist) {
gst_element_error (element, "could not negotiate");
return;
}
}
format = GST_FORMAT_TIME;
gst_pad_query (dvdec->videosrcpad, GST_QUERY_POSITION, &format, &ts);
dvdec->next_ts += (GST_SECOND*100) / dvdec->framerate;
if (GST_PAD_IS_LINKED (dvdec->audiosrcpad)) {
gint16 *a_ptr;
gint i, j;
dv_decode_full_audio (dvdec->decoder, GST_BUFFER_DATA (buf), dvdec->audio_buffers);
/* if we did not negotiate yet, do it now */
if (!GST_PAD_CAPS (dvdec->audiosrcpad)) {
gst_pad_try_set_caps (dvdec->audiosrcpad,
GST_CAPS_NEW (
"dvdec_audio_caps",
"audio/x-raw-int",
"rate", GST_PROPS_INT (dvdec->decoder->audio->frequency),
"depth", GST_PROPS_INT (16),
"width", GST_PROPS_INT (16),
"signed", GST_PROPS_BOOLEAN (TRUE),
"channels", GST_PROPS_INT (dvdec->decoder->audio->num_channels),
"endianness", GST_PROPS_INT (G_LITTLE_ENDIAN)
));
}
outbuf = gst_buffer_new ();
GST_BUFFER_SIZE (outbuf) = dvdec->decoder->audio->samples_this_frame *
sizeof (gint16) * dvdec->decoder->audio->num_channels;
GST_BUFFER_DATA (outbuf) = g_malloc (GST_BUFFER_SIZE (outbuf));
a_ptr = (gint16 *) GST_BUFFER_DATA (outbuf);
for (i = 0; i < dvdec->decoder->audio->samples_this_frame; i++) {
for (j = 0; j < dvdec->decoder->audio->num_channels; j++) {
*(a_ptr++) = dvdec->audio_buffers[j][i];
}
}
gst_dvdec_push (dvdec, outbuf, dvdec->audiosrcpad, ts);
}
if (GST_PAD_IS_LINKED (dvdec->videosrcpad)) {
guint8 *outframe;
guint8 *outframe_ptrs[3];
gint outframe_pitches[3];
/* try to grab a pool */
if (!dvdec->pool) {
dvdec->pool = gst_pad_get_bufferpool (dvdec->videosrcpad);
}
outbuf = NULL;
/* try to get a buffer from the pool if we have one */
if (dvdec->pool) {
outbuf = gst_buffer_new_from_pool (dvdec->pool, 0, 0);
}
/* no buffer from pool, allocate one ourselves */
if (!outbuf) {
outbuf = gst_buffer_new ();
GST_BUFFER_SIZE (outbuf) = (720 * height) * dvdec->bpp;
GST_BUFFER_DATA (outbuf) = g_malloc (GST_BUFFER_SIZE (outbuf));
}
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 * height;
outframe_ptrs[2] = outframe_ptrs[1] + 360 * height;
outframe_pitches[1] = height / 2;
outframe_pitches[2] = outframe_pitches[1];
}
dv_decode_full_frame (dvdec->decoder, GST_BUFFER_DATA (buf),
dvdec->space, outframe_ptrs, outframe_pitches);
gst_dvdec_push (dvdec, outbuf, dvdec->videosrcpad, ts);
}
if ((dvdec->end_position != -1) &&
(dvdec->next_ts >= dvdec->end_position) &&
!dvdec->loop) {
gst_element_set_eos (GST_ELEMENT (dvdec));
}
if (dvdec->need_discont) {
dvdec->need_discont = FALSE;
}
gst_buffer_unref (buf);
}
static GstElementStateReturn
gst_dvdec_change_state (GstElement *element)
{
GstDVDec *dvdec = GST_DVDEC (element);
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_NULL_TO_READY:
break;
case GST_STATE_READY_TO_PAUSED:
dvdec->bs = gst_bytestream_new (dvdec->sinkpad);
dvdec->decoder = dv_decoder_new (0, dvdec->clamp_luma, dvdec->clamp_chroma);
dvdec->decoder->quality = dvdec->quality;
break;
case GST_STATE_PAUSED_TO_PLAYING:
break;
case GST_STATE_PLAYING_TO_PAUSED:
if (dvdec->pool)
gst_buffer_pool_unref (dvdec->pool);
dvdec->pool = NULL;
break;
case GST_STATE_PAUSED_TO_READY:
dv_decoder_free (dvdec->decoder);
dvdec->decoder = NULL;
gst_bytestream_destroy (dvdec->bs);
break;
case GST_STATE_READY_TO_NULL:
break;
default:
break;
}
parent_class->change_state (element);
return GST_STATE_SUCCESS;
}
/* Arguments are part of the Gtk+ object system, and these functions
* enable the element to respond to various arguments.
*/
static void
gst_dvdec_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
GstDVDec *dvdec;
/* It's not null if we got it, but it might not be ours */
g_return_if_fail(GST_IS_DVDEC(object));
/* Get a pointer of the right type. */
dvdec = GST_DVDEC(object);
/* Check the argument id to see which argument we're setting. */
switch (prop_id) {
case ARG_CLAMP_LUMA:
dvdec->clamp_luma = g_value_get_boolean (value);
break;
case ARG_CLAMP_CHROMA:
dvdec->clamp_chroma = g_value_get_boolean (value);
break;
case ARG_QUALITY:
dvdec->quality = g_value_get_flags (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/* The set function is simply the inverse of the get fuction. */
static void
gst_dvdec_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
GstDVDec *dvdec;
/* It's not null if we got it, but it might not be ours */
g_return_if_fail(GST_IS_DVDEC(object));
dvdec = GST_DVDEC(object);
switch (prop_id) {
case ARG_CLAMP_LUMA:
g_value_set_boolean (value, dvdec->clamp_luma);
break;
case ARG_CLAMP_CHROMA:
g_value_set_boolean (value, dvdec->clamp_chroma);
break;
case ARG_QUALITY:
g_value_set_flags (value, dvdec->quality);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/* This is the entry into the plugin itself. When the plugin loads,
* this function is called to register everything that the plugin provides.
*/
static gboolean
plugin_init (GModule *module, GstPlugin *plugin)
{
GstElementFactory *factory;
GstTypeFactory *type;
if (!gst_library_load ("gstbytestream"))
return FALSE;
/* We need to create an ElementFactory for each element we provide.
* This consists of the name of the element, the GType identifier,
* and a pointer to the details structure at the top of the file.
*/
factory = gst_element_factory_new("dvdec", GST_TYPE_DVDEC, &dvdec_details);
g_return_val_if_fail(factory != NULL, FALSE);
gst_element_factory_set_rank (factory, GST_ELEMENT_RANK_PRIMARY);
/* The pad templates can be easily generated from the factories above,
* and then added to the list of padtemplates for the elementfactory.
* Note that the generated padtemplates are stored in static global
* variables, for the gst_dvdec_init function to use later on.
*/
gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET(sink_temp));
gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET(video_src_temp));
gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET(audio_src_temp));
/* The very last thing is to register the elementfactory with the plugin. */
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
type = gst_type_factory_new (&dv_definition);
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (type));
return TRUE;
}
GstPluginDesc plugin_desc = {
GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"dvdec",
plugin_init
};
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