/* 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
* information. This element outputs the 720x576 or 720x480 video that it
* recieves, noting the proper aspect ratio. This should not be a problem for
* windowed applications, which can change size to fit the video. Applications
- * with fixed size requirements should decide whether to crop or pad. If you
- * decide to crop, the videocrop element might be useful to you.
+ * with fixed size requirements should decide whether to crop or pad which
+ * an element such as videobox can do.
*/
#define NTSC_HEIGHT 480
GST_ELEMENT_DETAILS ("DV (smpte314) decoder plugin",
"Codec/Decoder/Video",
"Uses libdv to decode DV video (libdv.sourceforge.net)",
- "Erik Walthinsen <omega@cse.ogi.edu>\n" "Wim Taymans <wim.taymans@tvd.be>");
+ "Erik Walthinsen <omega@cse.ogi.edu>," "Wim Taymans <wim@fluendo.com>");
/* These are the signals that this element can fire. They are zero-
G_STRINGIFY (NTSC_NORMAL_PAR_X) "/" G_STRINGIFY (NTSC_NORMAL_PAR_Y) ","
G_STRINGIFY (NTSC_WIDE_PAR_X) "/" G_STRINGIFY (NTSC_WIDE_PAR_Y) "},"
"framerate = (double) [ 1.0, 60.0 ];"
- //"framerate = (double) { "
- //G_STRINGIFY (PAL_FRAMERATE) ", " G_STRINGIFY (NTSC_FRAMERATE)
- //" }; "
"video/x-raw-rgb, "
"bpp = (int) 32, "
"depth = (int) 24, "
G_STRINGIFY (NTSC_NORMAL_PAR_X) "/" G_STRINGIFY (NTSC_NORMAL_PAR_Y) ","
G_STRINGIFY (NTSC_WIDE_PAR_X) "/" G_STRINGIFY (NTSC_WIDE_PAR_Y) "},"
"framerate = (double) [ 1.0, 60.0 ];"
- //"framerate = (double) { "
- //G_STRINGIFY (PAL_FRAMERATE) ", " G_STRINGIFY (NTSC_FRAMERATE)
- //" }; "
"video/x-raw-rgb, "
"bpp = (int) 24, "
"depth = (int) 24, "
G_STRINGIFY (PAL_WIDE_PAR_X) "/" G_STRINGIFY (PAL_WIDE_PAR_Y) ","
G_STRINGIFY (NTSC_NORMAL_PAR_X) "/" G_STRINGIFY (NTSC_NORMAL_PAR_Y) ","
G_STRINGIFY (NTSC_WIDE_PAR_X) "/" G_STRINGIFY (NTSC_WIDE_PAR_Y) "},"
- "framerate = (double) [ 1.0, 60.0 ]"
- //"framerate = (double) { "
- //G_STRINGIFY (PAL_FRAMERATE) ", " G_STRINGIFY (NTSC_FRAMERATE)
- //" }"
- )
+ "framerate = (double) [ 1.0, 60.0 ]")
);
static GstStaticPadTemplate audio_src_temp = GST_STATIC_PAD_TEMPLATE ("audio",
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 gboolean gst_dvdec_src_query (GstPad * pad, GstQuery * query);
+
+#if 0
static const GstFormat *gst_dvdec_get_formats (GstPad * pad);
+#endif
+#if 0
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);
+#endif
-static GstPadLinkReturn gst_dvdec_video_link (GstPad * pad,
- const GstCaps * caps);
+static gboolean gst_dvdec_video_setcaps (GstPad * pad, GstCaps * caps);
static GstCaps *gst_dvdec_video_getcaps (GstPad * pad);
+#if 0
static const GstEventMask *gst_dvdec_get_event_masks (GstPad * pad);
+#endif
static gboolean gst_dvdec_handle_src_event (GstPad * pad, GstEvent * event);
-
-static void gst_dvdec_loop (GstElement * element);
+static GstFlowReturn gst_dvdec_chain (GstPad * pad, GstBuffer * buffer);
+static gboolean gst_dvdec_handle_sink_event (GstPad * pad, GstEvent * event);
static GstElementStateReturn gst_dvdec_change_state (GstElement * element);
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
+ gobject_class->set_property = gst_dvdec_set_property;
+ gobject_class->get_property = gst_dvdec_get_property;
+
/* The parent class is needed for class method overrides. */
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
g_param_spec_int ("drop-factor", "Drop Factor", "Only decode Nth frame",
1, G_MAXINT, DV_DEFAULT_DECODE_NTH, 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 */
{
gint i;
- dvdec->found_header = FALSE;
-
dvdec->sinkpad =
gst_pad_new_from_template (gst_static_pad_template_get (&sink_temp),
"sink");
gst_pad_set_query_function (dvdec->sinkpad, NULL);
+ gst_pad_set_chain_function (dvdec->sinkpad, gst_dvdec_chain);
+ gst_pad_set_event_function (dvdec->sinkpad, gst_dvdec_handle_sink_event);
+#if 0
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));
+#endif
gst_element_add_pad (GST_ELEMENT (dvdec), dvdec->sinkpad);
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));
+#if 0
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));
+#endif
gst_pad_set_getcaps_function (dvdec->videosrcpad,
GST_DEBUG_FUNCPTR (gst_dvdec_video_getcaps));
- gst_pad_set_link_function (dvdec->videosrcpad,
- GST_DEBUG_FUNCPTR (gst_dvdec_video_link));
+ gst_pad_set_setcaps_function (dvdec->videosrcpad,
+ GST_DEBUG_FUNCPTR (gst_dvdec_video_setcaps));
gst_element_add_pad (GST_ELEMENT (dvdec), dvdec->videosrcpad);
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));
+#if 0
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_src_convert));
gst_pad_set_formats_function (dvdec->audiosrcpad,
GST_DEBUG_FUNCPTR (gst_dvdec_get_formats));
- gst_pad_use_explicit_caps (dvdec->audiosrcpad);
+#endif
+
+ /* once we set caps, this is the only thing we can do */
+ gst_pad_use_fixed_caps (dvdec->audiosrcpad);
gst_element_add_pad (GST_ELEMENT (dvdec), dvdec->audiosrcpad);
- gst_element_set_loop_function (GST_ELEMENT (dvdec), gst_dvdec_loop);
+ dvdec->adapter = gst_adapter_new ();
- dvdec->bs = NULL;
dvdec->length = 0;
- dvdec->next_ts = 0LL;
+ dvdec->timestamp = 0LL;
+
dvdec->end_position = -1LL;
dvdec->need_discont = FALSE;
dvdec->new_media = FALSE;
}
}
+#if 0
static const GstFormat *
gst_dvdec_get_formats (GstPad * pad)
{
return (GST_PAD_IS_SRC (pad) ? src_formats : sink_formats);
}
+#endif
+#if 0
static gboolean
gst_dvdec_src_convert (GstPad * pad, GstFormat src_format, gint64 src_value,
GstFormat * dest_format, gint64 * dest_value)
}
return res;
}
+#endif
static const GstQueryType *
gst_dvdec_get_src_query_types (GstPad * pad)
{
static const GstQueryType src_query_types[] = {
- GST_QUERY_TOTAL,
GST_QUERY_POSITION,
0
};
}
static gboolean
-gst_dvdec_src_query (GstPad * pad, GstQueryType type,
- GstFormat * format, gint64 * value)
+gst_dvdec_src_query (GstPad * pad, GstQuery * query)
{
gboolean res = TRUE;
GstDVDec *dvdec;
dvdec = GST_DVDEC (gst_pad_get_parent (pad));
- switch (type) {
+ switch (GST_QUERY_TYPE (query)) {
+#if 0
case GST_QUERY_TOTAL:
switch (*format) {
default:
}
}
break;
+#endif
case GST_QUERY_POSITION:
+#if 0
switch (*format) {
default:
res =
value);
break;
}
+#endif
break;
default:
res = FALSE;
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)
+gst_dvdec_handle_sink_event (GstPad * pad, GstEvent * event)
{
- guint32 remaining;
- GstEvent *event;
- GstEventType type;
-
- gst_bytestream_get_status (dvdec->bs, &remaining, &event);
-
- type = event ? GST_EVENT_TYPE (event) : GST_EVENT_UNKNOWN;
+ GstDVDec *dvdec = GST_DVDEC (GST_PAD_PARENT (pad));
+ gboolean res = TRUE;
- switch (type) {
- case GST_EVENT_FLUSH:
+ switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_EOS:
- case GST_EVENT_FILLER:
- {
/* Forward the event to output sinks */
- if (GST_PAD_IS_LINKED (dvdec->videosrcpad)) {
- gst_event_ref (event);
- gst_pad_push (dvdec->videosrcpad, GST_DATA (event));
- }
- if (GST_PAD_IS_LINKED (dvdec->audiosrcpad)) {
- gst_event_ref (event);
- gst_pad_push (dvdec->audiosrcpad, GST_DATA (event));
- }
- if (type == GST_EVENT_EOS) {
- gst_element_set_eos (GST_ELEMENT (dvdec));
- }
+ GST_STREAM_LOCK (pad);
+ gst_event_ref (event);
+ gst_pad_push_event (dvdec->videosrcpad, event);
+ gst_pad_push_event (dvdec->audiosrcpad, event);
+ GST_STREAM_UNLOCK (pad);
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;
+ GST_STREAM_LOCK (pad);
+ res = gst_pad_event_default (dvdec->sinkpad, event);
+ GST_STREAM_UNLOCK (pad);
break;
- }
default:
- return gst_pad_event_default (dvdec->sinkpad, event);
+ res = gst_pad_event_default (dvdec->sinkpad, event);
break;
}
- gst_event_unref (event);
- return TRUE;
+
+ return res;
}
static gboolean
dvdec = GST_DVDEC (gst_pad_get_parent (pad));
switch (GST_EVENT_TYPE (event)) {
+#if 0
case GST_EVENT_SEEK_SEGMENT:
{
gint64 position;
dvdec->end_position = position;
dvdec->loop = GST_EVENT_SEEK_TYPE (event) & GST_SEEK_FLAG_SEGMENT_LOOP;
}
+#endif
case GST_EVENT_SEEK:
{
gint64 position;
/* first bring the format to time */
format = GST_FORMAT_TIME;
- if (!gst_pad_convert (pad,
+ if (!gst_pad_query_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;
+ dvdec->timestamp = 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,
+ if (!gst_pad_query_convert (dvdec->sinkpad, GST_FORMAT_TIME, position,
&format, &position)) {
/* could not convert seek format to byte offset */
res = FALSE;
break;
}
/* seek to offset */
+#if 0
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;
+#endif
+ dvdec->end_position = -1;
break;
}
default:
GstPadTemplate *src_pad_template;
dvdec = GST_DVDEC (gst_pad_get_parent (pad));
+
src_pad_template = gst_static_pad_template_get (&video_src_temp);
caps = gst_caps_copy (gst_pad_template_get_caps (src_pad_template));
}
}
+ gst_object_unref (dvdec);
+
return caps;
}
-static GstPadLinkReturn
-gst_dvdec_video_link (GstPad * pad, const GstCaps * caps)
+static gboolean
+gst_dvdec_video_setcaps (GstPad * pad, GstCaps * caps)
{
GstDVDec *dvdec;
GstStructure *structure;
- guint32 fourcc;
gint height;
gdouble framerate;
dvdec = GST_DVDEC (gst_pad_get_parent (pad));
- /* if we did not find a header yet, return delayed */
- if (!dvdec->found_header) {
- return GST_PAD_LINK_DELAYED;
- }
-
structure = gst_caps_get_structure (caps, 0);
if (!gst_structure_get_int (structure, "height", &height) ||
!gst_structure_get_double (structure, "framerate", &framerate))
- return GST_PAD_LINK_REFUSED;
+ goto not_supported;
/* allow a margin of error for the framerate caused by float rounding errors */
if ((height != dvdec->height) ||
(fabs (framerate - (dvdec->framerate / dvdec->drop_factor)) > 0.00000001))
- return GST_PAD_LINK_REFUSED;
+ goto not_supported;
if (strcmp (gst_structure_get_name (structure), "video/x-raw-rgb") == 0) {
gint bpp;
+ GST_DEBUG ("got rgb format");
+
gst_structure_get_int (structure, "bpp", &bpp);
if (bpp == 24) {
dvdec->space = e_dv_color_rgb;
dvdec->bpp = 3;
+ GST_DEBUG ("configured rgb24");
} else {
dvdec->space = e_dv_color_bgr0;
dvdec->bpp = 4;
+ GST_DEBUG ("configured bgr32");
}
} else {
+ guint32 fourcc;
+
if (!gst_structure_get_fourcc (structure, "format", &fourcc))
- return GST_PAD_LINK_REFUSED;
+ goto not_supported;
+
+ if (fourcc != GST_STR_FOURCC ("YUY2"))
+ goto not_supported;
dvdec->space = e_dv_color_yuv;
dvdec->bpp = 2;
+ GST_DEBUG ("configured YUY2");
}
- return GST_PAD_LINK_OK;
+ gst_object_unref (dvdec);
+
+ return TRUE;
+
+not_supported:
+ {
+ GST_DEBUG ("unsupported format");
+ gst_object_unref (dvdec);
+ return FALSE;
+ }
}
-static void
-gst_dvdec_push (GstDVDec * dvdec, GstBuffer * outbuf, GstPad * pad,
- GstClockTime ts)
+static GstFlowReturn
+gst_dvdec_decode_audio (GstDVDec * dvdec, const guint8 * data)
{
- if ((dvdec->need_discont) || (dvdec->new_media)) {
- GstEvent *discont;
+ gint num_samples;
+ gint frequency, channels;
+
+ frequency = dv_get_frequency (dvdec->decoder);
+ channels = dv_get_num_channels (dvdec->decoder);
+
+ /* check if format changed */
+ if ((frequency != dvdec->frequency) || (channels != dvdec->channels)) {
+ GstCaps *caps;
+
+ dvdec->frequency = frequency;
+ dvdec->channels = channels;
+
+ /* and set new caps */
+ caps = gst_caps_new_simple ("audio/x-raw-int",
+ "rate", G_TYPE_INT, frequency,
+ "depth", G_TYPE_INT, 16,
+ "width", G_TYPE_INT, 16,
+ "signed", G_TYPE_BOOLEAN, TRUE,
+ "channels", G_TYPE_INT, channels,
+ "endianness", G_TYPE_INT, G_LITTLE_ENDIAN, NULL);
+ gst_pad_set_caps (dvdec->audiosrcpad, caps);
+ gst_caps_unref (caps);
+ }
- discont = gst_event_new_discontinuous (FALSE, GST_FORMAT_TIME, ts, NULL);
- GST_EVENT_DISCONT_NEW_MEDIA (discont) = dvdec->new_media;
+ dv_decode_full_audio (dvdec->decoder, data, dvdec->audio_buffers);
- gst_pad_push (pad, GST_DATA (discont));
- }
+ if ((num_samples = dv_get_num_samples (dvdec->decoder)) > 0) {
+ gint16 *a_ptr;
+ gint i, j;
+ GstBuffer *outbuf;
- gst_pad_push (pad, GST_DATA (outbuf));
+ outbuf = gst_buffer_new_and_alloc (num_samples *
+ sizeof (gint16) * dvdec->channels);
- if ((dvdec->end_position != -1) && (dvdec->next_ts >= dvdec->end_position)) {
- if (dvdec->loop)
- gst_pad_push (pad, GST_DATA (gst_event_new (GST_EVENT_SEGMENT_DONE)));
- else
- gst_pad_push (pad, GST_DATA (gst_event_new (GST_EVENT_EOS)));
+ a_ptr = (gint16 *) GST_BUFFER_DATA (outbuf);
+
+ for (i = 0; i < num_samples; i++) {
+ for (j = 0; j < dvdec->channels; j++) {
+ *(a_ptr++) = dvdec->audio_buffers[j][i];
+ }
+ }
+
+ GST_BUFFER_TIMESTAMP (outbuf) = dvdec->timestamp;
+ GST_BUFFER_DURATION (outbuf) = dvdec->duration;
+ GST_BUFFER_OFFSET (outbuf) = dvdec->audio_offset;
+ dvdec->audio_offset += num_samples;
+ GST_BUFFER_OFFSET_END (outbuf) = dvdec->audio_offset;
+
+ gst_buffer_set_caps (outbuf, GST_PAD_CAPS (dvdec->audiosrcpad));
+
+ gst_pad_push (dvdec->audiosrcpad, outbuf);
}
+ return GST_FLOW_OK;
}
-static void
-gst_dvdec_loop (GstElement * element)
+static GstFlowReturn
+gst_dvdec_decode_video (GstDVDec * dvdec, const guint8 * data)
{
- GstDVDec *dvdec;
- GstBuffer *buf, *outbuf;
- guint8 *inframe;
+ guint8 *outframe;
+ guint8 *outframe_ptrs[3];
+ gint outframe_pitches[3];
+ gdouble framerate;
gint height;
- guint32 length, got_bytes;
- GstClockTime ts, duration;
- gdouble fps;
gboolean wide;
+ GstBuffer *outbuf;
+
+ /* get params */
+ framerate = (dvdec->PAL ? PAL_FRAMERATE : NTSC_FRAMERATE);
+ height = (dvdec->PAL ? PAL_HEIGHT : NTSC_HEIGHT);
+ wide = dv_format_wide (dvdec->decoder);
- dvdec = GST_DVDEC (element);
+ /* see if anything changed */
+ if ((dvdec->framerate != framerate) || (dvdec->height != height)
+ || dvdec->wide != wide) {
+ GstCaps *caps;
+ gint par_x, par_y;
- /*
- * Apparently dv_parse_header can read from the body of the frame
- * too, so it needs more than header_size bytes. Wacky!
- */
- if (dvdec->found_header)
- length = (dvdec->PAL ? PAL_BUFFER : NTSC_BUFFER);
- else
- length = NTSC_BUFFER;
-
- /* first read enough bytes to parse the header */
- got_bytes = gst_bytestream_peek_bytes (dvdec->bs, &inframe, length);
- if (got_bytes < length) {
- gst_dvdec_handle_sink_event (dvdec);
- return;
- }
- if (dv_parse_header (dvdec->decoder, inframe) < 0) {
- GST_ELEMENT_ERROR (dvdec, STREAM, DECODE, (NULL), (NULL));
- return;
+ dvdec->framerate = framerate;
+ dvdec->height = height;
+ dvdec->wide = wide;
+
+ if (dvdec->PAL) {
+ if (wide) {
+ par_x = PAL_WIDE_PAR_X;
+ par_y = PAL_WIDE_PAR_Y;
+ } else {
+ par_x = PAL_NORMAL_PAR_X;
+ par_y = PAL_NORMAL_PAR_Y;
+ }
+ } else {
+ if (wide) {
+ par_x = NTSC_WIDE_PAR_X;
+ par_y = NTSC_WIDE_PAR_Y;
+ } else {
+ par_x = NTSC_NORMAL_PAR_X;
+ par_y = NTSC_NORMAL_PAR_Y;
+ }
+ }
+
+ /* and set new caps, this will be used as suggestion in alloc
+ * function. */
+ caps = 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, height,
+ "framerate", G_TYPE_DOUBLE, framerate,
+ "pixel-aspect-ratio", GST_TYPE_FRACTION, par_x, par_y, NULL);
+ gst_pad_set_caps (dvdec->videosrcpad, caps);
+ gst_caps_unref (caps);
}
- /* after parsing the header we know the length of the data */
- dvdec->PAL = dv_system_50_fields (dvdec->decoder);
- dvdec->found_header = TRUE;
- fps = (dvdec->PAL ? PAL_FRAMERATE : NTSC_FRAMERATE);
- height = (dvdec->PAL ? PAL_HEIGHT : NTSC_HEIGHT);
- length = (dvdec->PAL ? PAL_BUFFER : NTSC_BUFFER);
- wide = dv_format_wide (dvdec->decoder);
+ /* check if we can skip this frame */
+ dvdec->framecount++;
+ if (dvdec->framecount < dvdec->drop_factor)
+ goto skip;
+ dvdec->framecount = 0;
+
+ if ((gst_pad_alloc_buffer (dvdec->videosrcpad, 0, (720 * height) * dvdec->bpp,
+ GST_PAD_CAPS (dvdec->videosrcpad), &outbuf)) != 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 * height;
+ outframe_ptrs[2] = outframe_ptrs[1] + 360 * height;
- if (length != dvdec->length) {
- dvdec->length = length;
- gst_bytestream_size_hint (dvdec->bs, length);
+ outframe_pitches[1] = height / 2;
+ outframe_pitches[2] = outframe_pitches[1];
}
- /* 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;
+ dv_decode_full_frame (dvdec->decoder, data,
+ dvdec->space, outframe_ptrs, outframe_pitches);
+
+ GST_BUFFER_TIMESTAMP (outbuf) = dvdec->timestamp;
+ GST_BUFFER_OFFSET (outbuf) = dvdec->video_offset;
+ GST_BUFFER_OFFSET_END (outbuf) = dvdec->video_offset + 1;
+ GST_BUFFER_DURATION (outbuf) = dvdec->duration * dvdec->drop_factor;
+
+ gst_pad_push (dvdec->videosrcpad, outbuf);
+
+skip:
+ dvdec->video_offset++;
+
+ return GST_FLOW_OK;
+
+ /* ERRORS */
+no_buffer:
+ {
+ return GST_FLOW_WRONG_STATE;
}
+}
- ts = dvdec->next_ts;
- dvdec->next_ts += GST_SECOND / fps;
- duration = dvdec->next_ts - ts;
+static GstFlowReturn
+gst_dvdec_decode_frame (GstDVDec * dvdec, const guint8 * data)
+{
+ GstClockTime next_ts;
- dv_parse_packs (dvdec->decoder, GST_BUFFER_DATA (buf));
- if (dv_is_new_recording (dvdec->decoder, GST_BUFFER_DATA (buf)))
- dvdec->new_media = TRUE;
- if (GST_PAD_IS_LINKED (dvdec->audiosrcpad)) {
- gint num_samples;
-
- dv_decode_full_audio (dvdec->decoder, GST_BUFFER_DATA (buf),
- dvdec->audio_buffers);
-
- if ((dv_get_frequency (dvdec->decoder) != dvdec->frequency) ||
- (dv_get_num_channels (dvdec->decoder) != dvdec->channels)) {
- if (!gst_pad_set_explicit_caps (dvdec->audiosrcpad,
- gst_caps_new_simple ("audio/x-raw-int",
- "rate", G_TYPE_INT, dv_get_frequency (dvdec->decoder),
- "depth", G_TYPE_INT, 16,
- "width", G_TYPE_INT, 16,
- "signed", G_TYPE_BOOLEAN, TRUE,
- "channels", G_TYPE_INT, dv_get_num_channels (dvdec->decoder),
- "endianness", G_TYPE_INT, G_LITTLE_ENDIAN, NULL))) {
- gst_buffer_unref (buf);
- GST_ELEMENT_ERROR (dvdec, CORE, NEGOTIATION, (NULL),
- ("Failed to negotiate audio parameters for the DV audio stream"));
- return;
- }
+ next_ts = dvdec->timestamp + GST_SECOND / dvdec->framerate;
+ dvdec->duration = next_ts - dvdec->timestamp;
- dvdec->frequency = dv_get_frequency (dvdec->decoder);
- dvdec->channels = dv_get_num_channels (dvdec->decoder);
- }
+ dv_parse_packs (dvdec->decoder, data);
+ if (dv_is_new_recording (dvdec->decoder, data))
+ dvdec->new_media = TRUE;
- num_samples = dv_get_num_samples (dvdec->decoder);
+ gst_dvdec_decode_audio (dvdec, data);
+ gst_dvdec_decode_video (dvdec, data);
- if (num_samples) {
- gint16 *a_ptr;
- gint i, j;
+ dvdec->timestamp = next_ts;
- outbuf = gst_buffer_new ();
- GST_BUFFER_SIZE (outbuf) = dv_get_num_samples (dvdec->decoder) *
- sizeof (gint16) * dv_get_num_channels (dvdec->decoder);
- GST_BUFFER_DATA (outbuf) = g_malloc (GST_BUFFER_SIZE (outbuf));
+ return GST_FLOW_OK;
+}
- a_ptr = (gint16 *) GST_BUFFER_DATA (outbuf);
+/* streaming operation:
+ *
+ * accumulate data until we have a frame, then decode.
+ */
+static GstFlowReturn
+gst_dvdec_chain (GstPad * pad, GstBuffer * buffer)
+{
+ GstDVDec *dvdec;
- for (i = 0; i < num_samples; i++) {
- for (j = 0; j < dv_get_num_channels (dvdec->decoder); j++) {
- *(a_ptr++) = dvdec->audio_buffers[j][i];
- }
- }
+ dvdec = GST_DVDEC (gst_pad_get_parent (pad));
- GST_BUFFER_TIMESTAMP (outbuf) = ts;
- GST_BUFFER_DURATION (outbuf) = duration;
- GST_BUFFER_OFFSET (outbuf) = dvdec->audio_offset;
- dvdec->audio_offset += num_samples;
- GST_BUFFER_OFFSET_END (outbuf) = dvdec->audio_offset;
+ gst_adapter_push (dvdec->adapter, buffer);
- gst_dvdec_push (dvdec, outbuf, dvdec->audiosrcpad, ts);
- }
- } else {
- dvdec->frequency = dv_get_frequency (dvdec->decoder);
- dvdec->channels = dv_get_num_channels (dvdec->decoder);
+ /* Apparently dv_parse_header can read from the body of the frame
+ * too, so it needs more than header_size bytes. Wacky!
+ */
+ if (dvdec->frame_len == -1) {
+ /* if we don't know the length of a frame, we assume it is
+ * the NTSC_BUFFER length, as this is enough to figure out
+ * if this is PAL or NTSC */
+ dvdec->frame_len = NTSC_BUFFER;
}
- if (GST_PAD_IS_LINKED (dvdec->videosrcpad)) {
- guint8 *outframe;
- guint8 *outframe_ptrs[3];
- gint outframe_pitches[3];
+ while (gst_adapter_available (dvdec->adapter) >= dvdec->frame_len) {
+ const guint8 *data;
+ gint length;
- dvdec->framecount++;
- if (dvdec->framecount < dvdec->drop_factor) {
- /* don't decode */
- goto end;
- }
- dvdec->framecount = 0;
+ /* get the accumulated bytes */
+ data = gst_adapter_peek (dvdec->adapter, dvdec->frame_len);
- if ((dvdec->framerate != fps) || (dvdec->height != height)
- || dvdec->wide != wide) {
- dvdec->height = height;
- dvdec->framerate = fps;
- dvdec->wide = wide;
+ /* parse header to know the length and other params */
+ if (dv_parse_header (dvdec->decoder, data) < 0)
+ goto parse_header_error;
- if (GST_PAD_LINK_FAILED (gst_pad_renegotiate (dvdec->videosrcpad))) {
- GST_ELEMENT_ERROR (dvdec, CORE, NEGOTIATION, (NULL), (NULL));
- return;
- }
- }
+ dvdec->found_header = TRUE;
+
+ /* after parsing the header we know the length of the data */
+ dvdec->PAL = dv_system_50_fields (dvdec->decoder);
+ dvdec->frame_len = (dvdec->PAL ? PAL_BUFFER : NTSC_BUFFER);
- outbuf = gst_buffer_new_and_alloc ((720 * height) * dvdec->bpp);
+ length = dvdec->frame_len;
- outframe = GST_BUFFER_DATA (outbuf);
+ /* if we still have enough for a frame, start decoding */
+ if (gst_adapter_available (dvdec->adapter) >= length) {
- outframe_ptrs[0] = outframe;
- outframe_pitches[0] = 720 * dvdec->bpp;
+ data = gst_adapter_peek (dvdec->adapter, length);
- /* 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;
+ /* and decode the data */
+ gst_dvdec_decode_frame (dvdec, data);
- outframe_pitches[1] = height / 2;
- outframe_pitches[2] = outframe_pitches[1];
+ gst_adapter_flush (dvdec->adapter, length);
}
+ }
- dv_decode_full_frame (dvdec->decoder, GST_BUFFER_DATA (buf),
- dvdec->space, outframe_ptrs, outframe_pitches);
+ gst_object_unref (dvdec);
- GST_BUFFER_TIMESTAMP (outbuf) = ts;
- GST_BUFFER_DURATION (outbuf) = duration * dvdec->drop_factor;
+ return GST_FLOW_OK;
- gst_dvdec_push (dvdec, outbuf, dvdec->videosrcpad, ts);
- } else {
- dvdec->height = height;
- dvdec->framerate = fps;
- dvdec->wide = wide;
- }
+ /* ERRORS */
+parse_header_error:
+ {
+ GST_ELEMENT_ERROR (dvdec, STREAM, DECODE,
+ ("Error parsing DV header"), ("Error parsing DV header"));
+ gst_object_unref (dvdec);
-end:
- if ((dvdec->end_position != -1) &&
- (dvdec->next_ts >= dvdec->end_position) && !dvdec->loop) {
- gst_element_set_eos (GST_ELEMENT (dvdec));
+ return GST_FLOW_ERROR;
}
-
- dvdec->need_discont = FALSE;
- dvdec->new_media = FALSE;
-
- gst_buffer_unref (buf);
}
static GstElementStateReturn
gst_dvdec_change_state (GstElement * element)
{
GstDVDec *dvdec = GST_DVDEC (element);
+ GstElementStateReturn ret;
+ gint transition;
+
+ transition = GST_STATE_TRANSITION (element);
- switch (GST_STATE_TRANSITION (element)) {
+ switch (transition) {
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 = qualities[dvdec->quality];
dvdec->audio_offset = 0;
+ dvdec->video_offset = 0;
dvdec->framecount = 0;
+ dvdec->found_header = FALSE;
+ dvdec->frame_len = -1;
/*
* Enable this function call when libdv2 0.100 or higher is more
* common
break;
case GST_STATE_PAUSED_TO_PLAYING:
break;
+ default:
+ break;
+ }
+
+ ret = parent_class->change_state (element);
+
+ switch (transition) {
case GST_STATE_PLAYING_TO_PAUSED:
break;
case GST_STATE_PAUSED_TO_READY:
+ gst_adapter_clear (dvdec->adapter);
dv_decoder_free (dvdec->decoder);
dvdec->decoder = NULL;
- dvdec->found_header = FALSE;
- gst_bytestream_destroy (dvdec->bs);
- dvdec->bs = NULL;
break;
case GST_STATE_READY_TO_NULL:
break;
default:
break;
}
-
- return parent_class->change_state (element);
+ return ret;
}
-/* 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;
- g_return_if_fail (GST_IS_DVDEC (object));
-
/* Get a pointer of the right type. */
dvdec = GST_DVDEC (object);
{
GstDVDec *dvdec;
- g_return_if_fail (GST_IS_DVDEC (object));
dvdec = GST_DVDEC (object);
switch (prop_id) {
static gboolean
plugin_init (GstPlugin * plugin)
{
- if (!gst_library_load ("gstbytestream"))
- return FALSE;
-
if (!gst_element_register (plugin, "dvdec", GST_RANK_PRIMARY,
gst_dvdec_get_type ()))
return FALSE;
projects / platform / upstream / gst-plugins-good.git / commitdiff