#include <string.h>
#include <math.h>
-/* First, include the header file for the plugin, to bring in the
- * object definition and other useful things.
- */
#include "gstdvdec.h"
-/* DV output has two modes, normal and wide. The resolution is the same in both
- * cases: 720 pixels wide by 576 pixels tall in PAL format, and 720x480 for
- * NTSC.
- *
- * Each of the modes has its own pixel aspect ratio, which is fixed in practice
- * by ITU-R BT.601 (also known as "CCIR-601" or "Rec.601"). Or so claims a
- * reference that I culled from the reliable "internet",
- * http://www.mir.com/DMG/aspect.html. Normal PAL is 59/54 and normal NTSC is
- * 10/11. Because the pixel resolution is the same for both cases, we can get
- * the pixel aspect ratio for wide recordings by multiplying by the ratio of
- * display aspect ratios, 16/9 (for wide) divided by 4/3 (for normal):
- *
- * Wide NTSC: 10/11 * (16/9)/(4/3) = 40/33
- * Wide PAL: 59/54 * (16/9)/(4/3) = 118/81
- *
- * However, the pixel resolution coming out of a DV source does not combine with
- * the standard pixel aspect ratios to give a proper display aspect ratio. An
- * image 480 pixels tall, with a 4:3 display aspect ratio, will be 768 pixels
- * wide. But, if we take the normal PAL aspect ratio of 59/54, and multiply it
- * with the width of the DV image (720 pixels), we get 786.666..., which is
- * nonintegral and too wide. The camera is not outputting a 4:3 image.
- *
- * If the video sink for this stream has fixed dimensions (such as for
- * fullscreen playback, or for a java applet in a web page), you then have two
- * choices. Either you show the whole image, but pad the image with black
- * borders on the top and bottom (like watching a widescreen video on a 4:3
- * device), or you crop the video to the proper ratio. Apparently the latter is
- * the standard practice.
- *
- * For its part, GStreamer is concerned with accuracy and preservation of
- * 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 which
- * an element such as videobox can do.
- */
-
-#define NTSC_HEIGHT 480
-#define NTSC_BUFFER 120000
-#define NTSC_FRAMERATE 30000/1001.
-
-#define PAL_HEIGHT 576
-#define PAL_BUFFER 144000
-#define PAL_FRAMERATE 25.0
-
-#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
-/* The ElementDetails structure gives a human-readable description
- * of the plugin, as well as author and version data.
- */
static GstElementDetails dvdec_details =
GST_ELEMENT_DETAILS ("DV (smpte314) decoder plugin",
"Codec/Decoder/Video",
"Erik Walthinsen <omega@cse.ogi.edu>," "Wim Taymans <wim@fluendo.com>");
-/* 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
-};
-
#define DV_DEFAULT_QUALITY DV_QUALITY_BEST
#define DV_DEFAULT_DECODE_NTH 1
-/* 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,
- ARG_DECODE_NTH
- /* FILL ME */
+ PROP_0,
+ PROP_CLAMP_LUMA,
+ PROP_CLAMP_CHROMA,
+ PROP_QUALITY,
+ PROP_DECODE_NTH
};
const gint qualities[] = {
DV_QUALITY_AC_2 | DV_QUALITY_COLOR
};
-/* 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.
- */
static GstStaticPadTemplate sink_temp = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
- GST_STATIC_CAPS ("video/x-dv, systemstream = (boolean) true")
+ GST_STATIC_CAPS ("video/x-dv, systemstream = (boolean) false")
);
-static GstStaticPadTemplate video_src_temp = GST_STATIC_PAD_TEMPLATE ("video",
+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, "
- "height = (int) { "
- G_STRINGIFY (NTSC_HEIGHT) ", " G_STRINGIFY (PAL_HEIGHT)
- " }, "
- "pixel-aspect-ratio=(fraction) { "
- G_STRINGIFY (PAL_NORMAL_PAR_X) "/" G_STRINGIFY (PAL_NORMAL_PAR_Y) ","
- 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 ];"
"video/x-raw-rgb, "
"bpp = (int) 32, "
"green_mask = (int) 0x00ff0000, "
"blue_mask = (int) 0xff000000, "
"width = (int) 720, "
- "height = (int) { "
- G_STRINGIFY (NTSC_HEIGHT) ", " G_STRINGIFY (PAL_HEIGHT)
- " }, "
- "pixel-aspect-ratio=(fraction) { "
- G_STRINGIFY (PAL_NORMAL_PAR_X) "/" G_STRINGIFY (PAL_NORMAL_PAR_Y) ","
- 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 ];"
"video/x-raw-rgb, "
"bpp = (int) 24, "
"red_mask = (int) 0x00ff0000, "
"green_mask = (int) 0x0000ff00, "
"blue_mask = (int) 0x000000ff, "
- "width = (int) 720, "
- "height = (int) { "
- G_STRINGIFY (NTSC_HEIGHT) ", " G_STRINGIFY (PAL_HEIGHT)
- " }, "
- "pixel-aspect-ratio=(fraction) { "
- G_STRINGIFY (PAL_NORMAL_PAR_X) "/" G_STRINGIFY (PAL_NORMAL_PAR_Y) ","
- 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 ]")
- );
-
-static GstStaticPadTemplate audio_src_temp = GST_STATIC_PAD_TEMPLATE ("audio",
- GST_PAD_SRC,
- GST_PAD_ALWAYS,
- GST_STATIC_CAPS ("audio/x-raw-int, "
- "depth = (int) 16, "
- "width = (int) 16, "
- "signed = (boolean) TRUE, "
- "channels = (int) {2, 4}, "
- "endianness = (int) " G_STRINGIFY (G_LITTLE_ENDIAN) ", "
- "rate = (int) { 32000, 44100, 48000 }")
+ "width = (int) 720, " "framerate = (double) [ 1.0, 60.0 ]")
);
#define GST_TYPE_DVDEC_QUALITY (gst_dvdec_quality_get_type())
return qtype;
}
-/* A number of functon prototypes are given so we can refer to them later. */
-static void gst_dvdec_base_init (gpointer g_class);
-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, GstQuery * query);
-static const GstQueryType *gst_dvdec_get_sink_query_types (GstPad * pad);
-static gboolean gst_dvdec_sink_query (GstPad * pad, GstQuery * query);
+GST_BOILERPLATE (GstDVDec, gst_dvdec, GstElement, GST_TYPE_ELEMENT);
-#if 0
-static const GstFormat *gst_dvdec_get_formats (GstPad * pad);
-#endif
-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 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 GstFlowReturn gst_dvdec_flush (GstDVDec * dvdec);
+static gboolean gst_dvdec_sink_setcaps (GstPad * pad, GstCaps * caps);
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);
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),
- gst_dvdec_base_init,
- 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;
-}
-
static void
gst_dvdec_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
- /* 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_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 (&video_src_temp));
- gst_element_class_add_pad_template (element_class,
- gst_static_pad_template_get (&audio_src_temp));
+ gst_static_pad_template_get (&src_temp));
gst_element_class_set_details (element_class, &dvdec_details);
}
-/* 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;
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_object_class_install_property (G_OBJECT_CLASS (klass), ARG_CLAMP_LUMA,
+ 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), ARG_CLAMP_CHROMA,
+ 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), ARG_QUALITY,
+ 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), ARG_DECODE_NTH,
+ 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));
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_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_pad_set_event_function (dvdec->sinkpad, gst_dvdec_handle_sink_event);
- gst_pad_set_query_function (dvdec->sinkpad,
- GST_DEBUG_FUNCPTR (gst_dvdec_sink_query));
- gst_pad_set_query_type_function (dvdec->sinkpad,
- GST_DEBUG_FUNCPTR (gst_dvdec_get_sink_query_types));
-#if 0
- 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_pad_new_from_template (gst_static_pad_template_get (&video_src_temp),
- "video");
- 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));
-#if 0
- gst_pad_set_event_mask_function (dvdec->videosrcpad,
- GST_DEBUG_FUNCPTR (gst_dvdec_get_event_masks));
- 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_setcaps_function (dvdec->videosrcpad,
- GST_DEBUG_FUNCPTR (gst_dvdec_video_setcaps));
- gst_element_add_pad (GST_ELEMENT (dvdec), dvdec->videosrcpad);
-
- dvdec->audiosrcpad =
- gst_pad_new_from_template (gst_static_pad_template_get (&audio_src_temp),
- "audio");
- 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));
-#if 0
- gst_pad_set_event_mask_function (dvdec->audiosrcpad,
- GST_DEBUG_FUNCPTR (gst_dvdec_get_event_masks));
- gst_pad_set_formats_function (dvdec->audiosrcpad,
- GST_DEBUG_FUNCPTR (gst_dvdec_get_formats));
-#endif
+ dvdec->srcpad =
+ gst_pad_new_from_template (gst_static_pad_template_get (&src_temp),
+ "src");
- /* 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_pad_use_fixed_caps (dvdec->srcpad);
- dvdec->adapter = gst_adapter_new ();
+ gst_element_add_pad (GST_ELEMENT (dvdec), dvdec->srcpad);
- dvdec->timestamp = 0LL;
-
- dvdec->start_timestamp = -1LL;
- dvdec->stop_timestamp = -1LL;
- dvdec->need_discont = FALSE;
- dvdec->new_media = FALSE;
dvdec->framerate = 0;
dvdec->height = 0;
- dvdec->frequency = 0;
- dvdec->channels = 0;
dvdec->wide = FALSE;
dvdec->drop_factor = 1;
+ dvdec->headers_seen = FALSE;
dvdec->clamp_luma = FALSE;
dvdec->clamp_chroma = FALSE;
dvdec->quality = DV_DEFAULT_QUALITY;
- dvdec->loop = FALSE;
-
- for (i = 0; i < 4; i++) {
- dvdec->audio_buffers[i] =
- (gint16 *) g_malloc (DV_AUDIO_MAX_SAMPLES * sizeof (gint16));
- }
}
-#if 0
-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,
- GST_FORMAT_DEFAULT,
- 0
- };
-
- return (GST_PAD_IS_SRC (pad) ? src_formats : sink_formats);
-}
-#endif
-
static gboolean
-gst_dvdec_src_convert (GstPad * pad, GstFormat src_format, gint64 src_value,
- GstFormat * dest_format, gint64 * dest_value)
+gst_dvdec_sink_setcaps (GstPad * pad, GstCaps * caps)
{
- gboolean res = TRUE;
GstDVDec *dvdec;
+ GstStructure *s;
+ GstCaps *othercaps;
+ const GValue *v;
dvdec = GST_DVDEC (gst_pad_get_parent (pad));
- if (dvdec->frame_len == -1)
- goto error;
-
- if (dvdec->decoder == NULL)
- goto error;
-
- if (*dest_format == src_format) {
- *dest_value = src_value;
- goto done;
- }
-
- switch (src_format) {
- case GST_FORMAT_BYTES:
- switch (*dest_format) {
- case GST_FORMAT_BYTES:
- *dest_value = src_value;
- break;
- case GST_FORMAT_DEFAULT:
- case GST_FORMAT_TIME:
- *dest_format = GST_FORMAT_TIME;
- if (pad == dvdec->videosrcpad)
- *dest_value = src_value * GST_SECOND /
- (720 * dvdec->height * dvdec->bpp * dvdec->framerate /
- GST_SECOND);
- else if (pad == dvdec->audiosrcpad)
- *dest_value = src_value * GST_SECOND /
- (2 * dvdec->frequency * dvdec->channels);
- break;
- default:
- res = FALSE;
- }
- break;
- case GST_FORMAT_TIME:
- switch (*dest_format) {
- case GST_FORMAT_BYTES:
- if (pad == dvdec->videosrcpad)
- *dest_value = src_value * 720 * dvdec->height * dvdec->bpp *
- dvdec->framerate / GST_SECOND;
- else if (pad == dvdec->audiosrcpad)
- *dest_value = 2 * src_value * dvdec->frequency *
- dvdec->channels / GST_SECOND;
- break;
- case GST_FORMAT_TIME:
- case GST_FORMAT_DEFAULT:
- *dest_format = GST_FORMAT_TIME;
- *dest_value = src_value;
- break;
- default:
- res = FALSE;
- }
- break;
- default:
- res = FALSE;
- }
-
-done:
- gst_object_unref (dvdec);
-
- return res;
-
-error:
- {
- gst_object_unref (dvdec);
- return FALSE;
- }
-}
-
-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;
- gdouble framerate;
- dvdec = GST_DVDEC (gst_pad_get_parent (pad));
+ /* first parse the caps */
+ s = gst_caps_get_structure (caps, 0);
- if (dvdec->frame_len <= 0)
+ if (!gst_structure_get_int (s, "height", &dvdec->height))
+ goto error;
+ if (!(v = gst_structure_get_value (s, "pixel-aspect-ratio")))
+ goto error;
+ if (!gst_structure_get_double (s, "framerate", &dvdec->framerate))
goto error;
- GST_DEBUG ("%d -> %d", src_format, *dest_format);
-
- if (*dest_format == GST_FORMAT_DEFAULT)
- *dest_format = GST_FORMAT_TIME;
-
- if (*dest_format == src_format) {
- *dest_value = src_value;
- goto done;
- }
-
- framerate = (dvdec->PAL ? PAL_FRAMERATE : NTSC_FRAMERATE);
-
- switch (src_format) {
- case GST_FORMAT_BYTES:
- switch (*dest_format) {
- case GST_FORMAT_TIME:
- {
- guint64 frame;
-
- /* get frame number */
- frame = src_value / dvdec->frame_len;
-
- *dest_value = (frame * GST_SECOND) / 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 * framerate / GST_SECOND;
- /* calculate the offset */
- *dest_value = frame * dvdec->frame_len;
- break;
- }
- default:
- res = FALSE;
- }
- break;
- default:
- res = FALSE;
- }
-
-done:
- gst_object_unref (dvdec);
- return res;
-
-error:
- {
- gst_object_unref (dvdec);
- return FALSE;
- }
-}
-
-static const GstQueryType *
-gst_dvdec_get_src_query_types (GstPad * pad)
-{
- static const GstQueryType src_query_types[] = {
- GST_QUERY_POSITION,
- GST_QUERY_CONVERT,
- 0
- };
-
- return src_query_types;
-}
-
-static gboolean
-gst_dvdec_src_query (GstPad * pad, GstQuery * query)
-{
- gboolean res = TRUE;
- GstDVDec *dvdec;
-
- dvdec = GST_DVDEC (gst_pad_get_parent (pad));
-
- switch (GST_QUERY_TYPE (query)) {
- case GST_QUERY_POSITION:
- {
- GstFormat format;
- gint64 cur, end;
- GstPad *peer;
-
- /* get target format */
- gst_query_parse_position (query, &format, NULL, NULL);
-
- /* change query to perform on peer */
- gst_query_set_position (query, GST_FORMAT_BYTES, -1, -1);
-
- if ((peer = gst_pad_get_peer (dvdec->sinkpad))) {
- /* ask peer for total length */
- if (!(res = gst_pad_query (peer, query))) {
- gst_object_unref (peer);
- goto error;
- }
-
- /* get peer total length */
- gst_query_parse_position (query, NULL, NULL, &end);
-
- /* convert end to requested format */
- if (end != -1) {
- if (!(res = gst_pad_query_convert (dvdec->sinkpad,
- GST_FORMAT_BYTES, end, &format, &end))) {
- gst_object_unref (peer);
- goto error;
- }
- }
- gst_object_unref (peer);
- } else {
- end = -1;
- }
- /* bring the position to the requested format. */
- if (!(res = gst_pad_query_convert (pad,
- GST_FORMAT_TIME, dvdec->timestamp, &format, &cur)))
- goto error;
-
- gst_query_set_position (query, format, cur, end);
- break;
- }
- case GST_QUERY_CONVERT:
- {
- GstFormat src_fmt, dest_fmt;
- gint64 src_val, dest_val;
-
- gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
- if (!(res =
- gst_dvdec_src_convert (pad, src_fmt, src_val, &dest_fmt,
- &dest_val)))
- goto error;
- gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
- break;
- }
- default:
- res = FALSE;
- break;
- }
- gst_object_unref (dvdec);
-
- return res;
+ /* ignoring rgb, bgr0 for now */
-error:
- {
- gst_object_unref (dvdec);
- GST_DEBUG ("error handling event");
- return FALSE;
- }
-}
+ dvdec->bpp = 2;
-static const GstQueryType *
-gst_dvdec_get_sink_query_types (GstPad * pad)
-{
- static const GstQueryType sink_query_types[] = {
- GST_QUERY_CONVERT,
- 0
- };
+ 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", G_TYPE_DOUBLE, dvdec->framerate, NULL);
+ gst_structure_set_value (gst_caps_get_structure (othercaps, 0),
+ "pixel-aspect-ratio", v);
- return sink_query_types;
-}
+ gst_pad_set_caps (dvdec->srcpad, othercaps);
-static gboolean
-gst_dvdec_sink_query (GstPad * pad, GstQuery * query)
-{
- gboolean res = TRUE;
- GstDVDec *dvdec;
-
- dvdec = GST_DVDEC (gst_pad_get_parent (pad));
+ gst_caps_unref (othercaps);
- switch (GST_QUERY_TYPE (query)) {
- case GST_QUERY_CONVERT:
- {
- GstFormat src_fmt, dest_fmt;
- gint64 src_val, dest_val;
-
- gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
- if (!(res =
- gst_dvdec_sink_convert (pad, src_fmt, src_val, &dest_fmt,
- &dest_val)))
- goto error;
- gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
- break;
- }
- default:
- res = FALSE;
- break;
- }
gst_object_unref (dvdec);
- return res;
+ return TRUE;
error:
{
gst_object_unref (dvdec);
- GST_DEBUG ("error handling event");
- return FALSE;
- }
-}
-
-static gboolean
-gst_dvdec_send_event (GstDVDec * dvdec, GstEvent * event)
-{
- gboolean res = FALSE;
-
- gst_event_ref (event);
- res |= gst_pad_push_event (dvdec->videosrcpad, event);
- res |= gst_pad_push_event (dvdec->audiosrcpad, event);
-
- return res;
-}
-
-static gboolean
-gst_dvdec_handle_sink_event (GstPad * pad, GstEvent * event)
-{
- GstDVDec *dvdec = GST_DVDEC (gst_pad_get_parent (pad));
- gboolean res = TRUE;
-
- switch (GST_EVENT_TYPE (event)) {
- case GST_EVENT_FLUSH_START:
- /* we are not blocking on anything exect the push() calls
- * to the peer which will be unblocked by forwarding the
- * event.*/
- res = gst_dvdec_send_event (dvdec, event);
-
- /* and wait till streaming stops, not strictly needed as
- * the peer calling us will do the same. */
- GST_STREAM_LOCK (pad);
- GST_STREAM_UNLOCK (pad);
- break;
- case GST_EVENT_FLUSH_STOP:
- GST_STREAM_LOCK (pad);
- gst_adapter_clear (dvdec->adapter);
- GST_DEBUG ("cleared adapter");
- res = gst_dvdec_send_event (dvdec, event);
- GST_STREAM_UNLOCK (pad);
- break;
- case GST_EVENT_NEWSEGMENT:
- {
- GstFormat format;
- GST_STREAM_LOCK (pad);
-
- /* parse byte start and stop positions */
- gst_event_parse_newsegment (event, NULL, &format,
- &dvdec->start_byte, &dvdec->stop_byte, NULL);
-
- /* and queue a DISCONT before sending the next set of buffers */
- dvdec->need_discont = TRUE;
- gst_event_unref (event);
- GST_STREAM_UNLOCK (pad);
- break;
- }
- case GST_EVENT_EOS:
- default:
- GST_STREAM_LOCK (pad);
- /* flush any pending data */
- gst_dvdec_flush (dvdec);
- /* forward event */
- res = gst_dvdec_send_event (dvdec, event);
- /* and clear the adapter */
- gst_adapter_clear (dvdec->adapter);
- GST_STREAM_UNLOCK (pad);
- break;
- }
-
- gst_object_unref (dvdec);
-
- return res;
-}
-
-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:
- {
- GstEvent *newevent;
- gint64 offset;
- GstFormat format, conv;
- gint64 cur, stop;
- gdouble rate;
- GstSeekType cur_type, stop_type;
- GstSeekFlags flags;
- gint64 start_position, end_position;
-
- gst_event_parse_seek (event, &rate, &format, &flags,
- &cur_type, &cur, &stop_type, &stop);
-
- if ((offset = cur) != -1) {
- /* bring the format to time on srcpad. */
- conv = GST_FORMAT_TIME;
- if (!(res = gst_pad_query_convert (pad,
- format, offset, &conv, &start_position))) {
- /* could not convert seek format to time offset */
- break;
- }
- /* and convert to bytes on sinkpad. */
- conv = GST_FORMAT_BYTES;
- if (!(res = gst_pad_query_convert (dvdec->sinkpad,
- GST_FORMAT_TIME, start_position, &conv, &start_position))) {
- /* could not convert time format to bytes offset */
- break;
- }
- } else {
- start_position = -1;
- }
-
- if ((offset = stop) != -1) {
- /* bring the format to time on srcpad. */
- conv = GST_FORMAT_TIME;
- if (!(res = gst_pad_query_convert (pad,
- format, offset, &conv, &end_position))) {
- /* could not convert seek format to time offset */
- break;
- }
- conv = GST_FORMAT_BYTES;
- /* and convert to bytes on sinkpad. */
- if (!(res = gst_pad_query_convert (dvdec->sinkpad,
- GST_FORMAT_TIME, end_position, &conv, &end_position))) {
- /* could not convert seek format to bytes offset */
- break;
- }
- } else {
- end_position = -1;
- }
- /* now this is the updated seek event on bytes */
- newevent = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
- cur_type, start_position, stop_type, end_position);
-
- res = gst_pad_push_event (dvdec->sinkpad, newevent);
- break;
- }
- default:
- res = FALSE;
- break;
- }
- gst_event_unref (event);
-
- gst_object_unref (dvdec);
-
- return res;
-}
-
-static GstCaps *
-gst_dvdec_video_getcaps (GstPad * pad)
-{
- GstDVDec *dvdec;
- GstCaps *caps;
- 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));
-
- if (dvdec->found_header) {
- int i;
- gint par_x, par_y;
-
- if (dvdec->PAL) {
- if (dvdec->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 (dvdec->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;
- }
- }
- /* set the height */
- for (i = 0; i < gst_caps_get_size (caps); i++) {
- GstStructure *structure = gst_caps_get_structure (caps, i);
-
- gst_structure_set (structure,
- "height", G_TYPE_INT, dvdec->height,
- "framerate", G_TYPE_DOUBLE, dvdec->framerate / dvdec->drop_factor,
- "pixel-aspect-ratio", GST_TYPE_FRACTION, par_x, par_y, NULL);
- }
- }
-
- gst_object_unref (dvdec);
-
- return caps;
-}
-
-static gboolean
-gst_dvdec_video_setcaps (GstPad * pad, GstCaps * caps)
-{
- GstDVDec *dvdec;
- GstStructure *structure;
- gint height;
- gdouble framerate;
-
- dvdec = GST_DVDEC (gst_pad_get_parent (pad));
-
- structure = gst_caps_get_structure (caps, 0);
-
- if (!gst_structure_get_int (structure, "height", &height) ||
- !gst_structure_get_double (structure, "framerate", &framerate))
- 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))
- 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))
- 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");
- }
-
- gst_object_unref (dvdec);
-
- return TRUE;
-
-not_supported:
- {
- GST_DEBUG ("unsupported format");
- gst_object_unref (dvdec);
return FALSE;
}
}
static GstFlowReturn
-gst_dvdec_decode_audio (GstDVDec * dvdec, const guint8 * data)
-{
- gint num_samples;
- gint frequency, channels;
- GstFlowReturn ret;
-
- 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);
- }
-
- dv_decode_full_audio (dvdec->decoder, data, dvdec->audio_buffers);
-
- if ((num_samples = dv_get_num_samples (dvdec->decoder)) > 0) {
- gint16 *a_ptr;
- gint i, j;
- GstBuffer *outbuf;
-
- outbuf = gst_buffer_new_and_alloc (num_samples *
- sizeof (gint16) * dvdec->channels);
-
- 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_DEBUG ("pushing audio %" GST_TIME_FORMAT,
- GST_TIME_ARGS (dvdec->timestamp));
-
- 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));
-
- ret = gst_pad_push (dvdec->audiosrcpad, outbuf);
- } else {
- /* no samples */
- ret = GST_FLOW_OK;
- }
-
- return ret;
-}
-
-static GstFlowReturn
-gst_dvdec_decode_video (GstDVDec * dvdec, const guint8 * data)
+gst_dvdec_chain (GstPad * pad, GstBuffer * buf)
{
+ GstDVDec *dvdec;
+ guint8 *inframe;
guint8 *outframe;
guint8 *outframe_ptrs[3];
gint outframe_pitches[3];
- gdouble framerate;
- gint height;
- gboolean wide;
GstBuffer *outbuf;
GstFlowReturn ret = GST_FLOW_OK;
- /* get params */
- framerate = (dvdec->PAL ? PAL_FRAMERATE : NTSC_FRAMERATE);
- height = (dvdec->PAL ? PAL_HEIGHT : NTSC_HEIGHT);
- wide = dv_format_wide (dvdec->decoder);
-
- /* see if anything changed */
- if ((dvdec->framerate != framerate) || (dvdec->height != height)
- || dvdec->wide != wide) {
- GstCaps *caps;
- gboolean setcaps_ret;
- gint par_x, par_y;
-
- 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 / dvdec->drop_factor,
- "pixel-aspect-ratio", GST_TYPE_FRACTION, par_x, par_y, NULL);
- setcaps_ret = gst_pad_set_caps (dvdec->videosrcpad, caps);
- gst_caps_unref (caps);
- g_return_val_if_fail (setcaps_ret == TRUE, GST_FLOW_UNEXPECTED);
- }
+ dvdec = GST_DVDEC (gst_pad_get_parent (pad));
+ inframe = GST_BUFFER_DATA (buf);
+ if (dv_parse_header (dvdec->decoder, inframe) < 0)
+ g_assert_not_reached ();
+ dv_parse_packs (dvdec->decoder, inframe);
- /* check if we can skip this frame */
- dvdec->framecount++;
- if (dvdec->framecount < dvdec->drop_factor)
+ if (dvdec->video_offset % dvdec->drop_factor != 0)
goto skip;
- dvdec->framecount = 0;
ret =
- gst_pad_alloc_buffer (dvdec->videosrcpad, 0, (720 * height) * dvdec->bpp,
- GST_PAD_CAPS (dvdec->videosrcpad), &outbuf);
+ gst_pad_alloc_buffer (dvdec->srcpad, 0,
+ (720 * dvdec->height) * dvdec->bpp,
+ GST_PAD_CAPS (dvdec->srcpad), &outbuf);
if (ret != GST_FLOW_OK)
goto no_buffer;
/* 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_ptrs[1] = outframe_ptrs[0] + 720 * dvdec->height;
+ outframe_ptrs[2] = outframe_ptrs[1] + 360 * dvdec->height;
- outframe_pitches[1] = height / 2;
+ outframe_pitches[1] = dvdec->height / 2;
outframe_pitches[2] = outframe_pitches[1];
}
- dv_decode_full_frame (dvdec->decoder, data,
- dvdec->space, outframe_ptrs, outframe_pitches);
+ dv_decode_full_frame (dvdec->decoder, inframe,
+ e_dv_color_yuv, outframe_ptrs, outframe_pitches);
- GST_DEBUG ("pushing video %" GST_TIME_FORMAT,
- GST_TIME_ARGS (dvdec->timestamp));
+ gst_buffer_stamp (outbuf, buf);
- 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;
-
- ret = gst_pad_push (dvdec->videosrcpad, outbuf);
+ ret = gst_pad_push (dvdec->srcpad, outbuf);
skip:
+ gst_buffer_unref (buf);
dvdec->video_offset++;
+ gst_object_unref (dvdec);
return ret;
/* ERRORS */
no_buffer:
{
- return ret;
- }
-}
-
-static GstFlowReturn
-gst_dvdec_decode_frame (GstDVDec * dvdec, const guint8 * data)
-{
- GstClockTime next_ts;
- gdouble framerate;
- GstFlowReturn aret, vret, ret;
-
- if (dvdec->need_discont) {
- GstEvent *event;
- GstFormat format;
- gboolean res;
-
- /* convert to time and store as start/end_timestamp */
- format = GST_FORMAT_TIME;
- if (!(res = gst_pad_query_convert (dvdec->sinkpad,
- GST_FORMAT_BYTES,
- dvdec->start_byte, &format, &dvdec->start_timestamp))) {
- goto discont_error;
- }
-
- dvdec->timestamp = dvdec->start_timestamp;
-
- format = GST_FORMAT_TIME;
- if (!(res = gst_pad_query_convert (dvdec->sinkpad,
- GST_FORMAT_BYTES,
- dvdec->stop_byte, &format, &dvdec->stop_timestamp))) {
- goto discont_error;
- }
-
- event = gst_event_new_newsegment (1.0, GST_FORMAT_TIME,
- dvdec->start_timestamp, dvdec->stop_timestamp, 0);
- gst_dvdec_send_event (dvdec, event);
-
- dvdec->need_discont = FALSE;
- }
-
- framerate = (dvdec->PAL ? PAL_FRAMERATE : NTSC_FRAMERATE);
-
- next_ts = dvdec->timestamp + GST_SECOND / framerate;
- dvdec->duration = next_ts - dvdec->timestamp;
-
- dv_parse_packs (dvdec->decoder, data);
- if (dv_is_new_recording (dvdec->decoder, data))
- dvdec->new_media = TRUE;
-
- aret = ret = gst_dvdec_decode_audio (dvdec, data);
- if (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED)
- goto done;
-
- vret = ret = gst_dvdec_decode_video (dvdec, data);
- if (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED)
- goto done;
-
- if (aret == GST_FLOW_NOT_LINKED && vret == GST_FLOW_NOT_LINKED) {
- ret = GST_FLOW_NOT_LINKED;
- goto done;
- }
-
- ret = GST_FLOW_OK;
- dvdec->timestamp = next_ts;
-
-done:
- return ret;
-
-discont_error:
- {
- GST_DEBUG ("error generating discont event");
- return GST_FLOW_ERROR;
- }
-}
-
-/* flush any remaining data in the adapter */
-static GstFlowReturn
-gst_dvdec_flush (GstDVDec * dvdec)
-{
- GstFlowReturn ret = GST_FLOW_OK;
-
- while (gst_adapter_available (dvdec->adapter) >= dvdec->frame_len) {
- const guint8 *data;
- gint length;
-
- /* get the accumulated bytes */
- data = gst_adapter_peek (dvdec->adapter, dvdec->frame_len);
-
- /* parse header to know the length and other params */
- if (dv_parse_header (dvdec->decoder, data) < 0)
- goto parse_header_error;
-
- dvdec->found_header = TRUE;
-
- /* after parsing the header we know the length of the data */
- dvdec->PAL = dv_system_50_fields (dvdec->decoder);
- length = dvdec->frame_len = (dvdec->PAL ? PAL_BUFFER : NTSC_BUFFER);
-
- /* if we still have enough for a frame, start decoding */
- if (gst_adapter_available (dvdec->adapter) >= length) {
-
- data = gst_adapter_peek (dvdec->adapter, length);
-
- /* and decode the data */
- ret = gst_dvdec_decode_frame (dvdec, data);
-
- gst_adapter_flush (dvdec->adapter, length);
-
- if (ret != GST_FLOW_OK)
- goto done;
- }
- }
-done:
- return ret;
-
- /* ERRORS */
-parse_header_error:
- {
- GST_ELEMENT_ERROR (dvdec, STREAM, DECODE,
- ("Error parsing DV header"), ("Error parsing DV header"));
+ gst_buffer_unref (buf);
gst_object_unref (dvdec);
-
- return GST_FLOW_ERROR;
- }
-}
-
-/* streaming operation:
- *
- * accumulate data until we have a frame, then decode.
- */
-static GstFlowReturn
-gst_dvdec_chain (GstPad * pad, GstBuffer * buffer)
-{
- GstDVDec *dvdec;
- GstFlowReturn ret;
-
- dvdec = GST_DVDEC (gst_pad_get_parent (pad));
-
- gst_adapter_push (dvdec->adapter, buffer);
-
- /* 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;
+ return ret;
}
-
- /* and try to flush pending frames */
- ret = gst_dvdec_flush (dvdec);
-
- return ret;
}
static GstElementStateReturn
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
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->headers_seen = FALSE;
break;
case GST_STATE_READY_TO_NULL:
break;
gst_dvdec_set_property (GObject * object, guint prop_id, const GValue * value,
GParamSpec * pspec)
{
- GstDVDec *dvdec;
-
- /* Get a pointer of the right type. */
- dvdec = GST_DVDEC (object);
+ GstDVDec *dvdec = GST_DVDEC (object);
- /* Check the argument id to see which argument we're setting. */
switch (prop_id) {
- case ARG_CLAMP_LUMA:
+ case PROP_CLAMP_LUMA:
dvdec->clamp_luma = g_value_get_boolean (value);
break;
- case ARG_CLAMP_CHROMA:
+ case PROP_CLAMP_CHROMA:
dvdec->clamp_chroma = g_value_get_boolean (value);
break;
- case ARG_QUALITY:
+ case PROP_QUALITY:
dvdec->quality = g_value_get_enum (value);
if ((dvdec->quality < 0) || (dvdec->quality > 5))
dvdec->quality = 0;
break;
- case ARG_DECODE_NTH:
+ case PROP_DECODE_NTH:
dvdec->drop_factor = g_value_get_int (value);
break;
default:
}
}
-/* 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;
-
- dvdec = GST_DVDEC (object);
+ GstDVDec *dvdec = GST_DVDEC (object);
switch (prop_id) {
- case ARG_CLAMP_LUMA:
+ case PROP_CLAMP_LUMA:
g_value_set_boolean (value, dvdec->clamp_luma);
break;
- case ARG_CLAMP_CHROMA:
+ case PROP_CLAMP_CHROMA:
g_value_set_boolean (value, dvdec->clamp_chroma);
break;
- case ARG_QUALITY:
+ case PROP_QUALITY:
g_value_set_enum (value, dvdec->quality);
break;
- case ARG_DECODE_NTH:
+ case PROP_DECODE_NTH:
g_value_set_int (value, dvdec->drop_factor);
break;
default:
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 (GstPlugin * plugin)
-{
- if (!gst_element_register (plugin, "dvdec", GST_RANK_PRIMARY,
- gst_dvdec_get_type ()))
- return FALSE;
-
- return TRUE;
-}
-
-GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
- GST_VERSION_MINOR,
- "dvdec",
- "Uses libdv to decode DV video (libdv.sourceforge.net)",
- plugin_init, VERSION, "LGPL", GST_PACKAGE, GST_ORIGIN);
--- /dev/null
+/* 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#include <string.h>
+#include <math.h>
+
+#include "gstdvdemux.h"
+
+/* DV output has two modes, normal and wide. The resolution is the same in both
+ * cases: 720 pixels wide by 576 pixels tall in PAL format, and 720x480 for
+ * NTSC.
+ *
+ * Each of the modes has its own pixel aspect ratio, which is fixed in practice
+ * by ITU-R BT.601 (also known as "CCIR-601" or "Rec.601"). Or so claims a
+ * reference that I culled from the reliable "internet",
+ * http://www.mir.com/DMG/aspect.html. Normal PAL is 59/54 and normal NTSC is
+ * 10/11. Because the pixel resolution is the same for both cases, we can get
+ * the pixel aspect ratio for wide recordings by multiplying by the ratio of
+ * display aspect ratios, 16/9 (for wide) divided by 4/3 (for normal):
+ *
+ * Wide NTSC: 10/11 * (16/9)/(4/3) = 40/33
+ * Wide PAL: 59/54 * (16/9)/(4/3) = 118/81
+ *
+ * However, the pixel resolution coming out of a DV source does not combine with
+ * the standard pixel aspect ratios to give a proper display aspect ratio. An
+ * image 480 pixels tall, with a 4:3 display aspect ratio, will be 768 pixels
+ * wide. But, if we take the normal PAL aspect ratio of 59/54, and multiply it
+ * with the width of the DV image (720 pixels), we get 786.666..., which is
+ * nonintegral and too wide. The camera is not outputting a 4:3 image.
+ *
+ * If the video sink for this stream has fixed dimensions (such as for
+ * fullscreen playback, or for a java applet in a web page), you then have two
+ * choices. Either you show the whole image, but pad the image with black
+ * borders on the top and bottom (like watching a widescreen video on a 4:3
+ * device), or you crop the video to the proper ratio. Apparently the latter is
+ * the standard practice.
+ *
+ * For its part, GStreamer is concerned with accuracy and preservation of
+ * 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 which
+ * an element such as videobox can do.
+ */
+
+#define NTSC_HEIGHT 480
+#define NTSC_BUFFER 120000
+#define NTSC_FRAMERATE 30000/1001.
+
+#define PAL_HEIGHT 576
+#define PAL_BUFFER 144000
+#define PAL_FRAMERATE 25.0
+
+#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
+
+static GstElementDetails dvdemux_details =
+GST_ELEMENT_DETAILS ("DV system stream demuxer",
+ "Codec/Demuxer",
+ "Uses libdv to separate DV audio from DV video",
+ "Erik Walthinsen <omega@cse.ogi.edu>, Wim Taymans <wim@fluendo.com>");
+
+static GstStaticPadTemplate sink_temp = GST_STATIC_PAD_TEMPLATE ("sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("video/x-dv, systemstream = (boolean) true")
+ );
+
+static GstStaticPadTemplate video_src_temp = GST_STATIC_PAD_TEMPLATE ("video",
+ GST_PAD_SRC,
+ GST_PAD_SOMETIMES,
+ GST_STATIC_CAPS ("video/x-dv, systemstream = (boolean) false")
+ );
+
+static GstStaticPadTemplate audio_src_temp = GST_STATIC_PAD_TEMPLATE ("audio",
+ GST_PAD_SRC,
+ GST_PAD_SOMETIMES,
+ GST_STATIC_CAPS ("audio/x-raw-int, "
+ "depth = (int) 16, "
+ "width = (int) 16, "
+ "signed = (boolean) TRUE, "
+ "channels = (int) {2, 4}, "
+ "endianness = (int) " G_STRINGIFY (G_BYTE_ORDER) ", "
+ "rate = (int) { 32000, 44100, 48000 }")
+ );
+
+
+GST_BOILERPLATE (GstDVDemux, gst_dvdemux, GstElement, GST_TYPE_ELEMENT);
+
+
+static const GstQueryType *gst_dvdemux_get_src_query_types (GstPad * pad);
+static gboolean gst_dvdemux_src_query (GstPad * pad, GstQuery * query);
+static const GstQueryType *gst_dvdemux_get_sink_query_types (GstPad * pad);
+static gboolean gst_dvdemux_sink_query (GstPad * pad, GstQuery * query);
+
+static gboolean gst_dvdemux_sink_convert (GstPad * pad, GstFormat src_format,
+ gint64 src_value, GstFormat * dest_format, gint64 * dest_value);
+static gboolean gst_dvdemux_src_convert (GstPad * pad, GstFormat src_format,
+ gint64 src_value, GstFormat * dest_format, gint64 * dest_value);
+
+static gboolean gst_dvdemux_handle_src_event (GstPad * pad, GstEvent * event);
+static GstFlowReturn gst_dvdemux_flush (GstDVDemux * dvdemux);
+static GstFlowReturn gst_dvdemux_chain (GstPad * pad, GstBuffer * buffer);
+static gboolean gst_dvdemux_handle_sink_event (GstPad * pad, GstEvent * event);
+
+static GstElementStateReturn gst_dvdemux_change_state (GstElement * element);
+
+
+static void
+gst_dvdemux_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 (&video_src_temp));
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&audio_src_temp));
+
+ gst_element_class_set_details (element_class, &dvdemux_details);
+}
+
+static void
+gst_dvdemux_class_init (GstDVDemuxClass * klass)
+{
+ GstElementClass *gstelement_class;
+
+ gstelement_class = (GstElementClass *) klass;
+
+ gstelement_class->change_state = gst_dvdemux_change_state;
+
+ /* table initialization, only do once */
+ dv_init (0, 0);
+}
+
+static void
+gst_dvdemux_init (GstDVDemux * dvdemux)
+{
+ gint i;
+
+ dvdemux->sinkpad =
+ gst_pad_new_from_template (gst_static_pad_template_get (&sink_temp),
+ "sink");
+ gst_pad_set_chain_function (dvdemux->sinkpad, gst_dvdemux_chain);
+ gst_pad_set_event_function (dvdemux->sinkpad, gst_dvdemux_handle_sink_event);
+ gst_pad_set_query_function (dvdemux->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_dvdemux_sink_query));
+ gst_pad_set_query_type_function (dvdemux->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_dvdemux_get_sink_query_types));
+ gst_element_add_pad (GST_ELEMENT (dvdemux), dvdemux->sinkpad);
+
+ dvdemux->adapter = gst_adapter_new ();
+
+ dvdemux->timestamp = 0LL;
+
+ dvdemux->start_timestamp = -1LL;
+ dvdemux->stop_timestamp = -1LL;
+ dvdemux->need_discont = FALSE;
+ dvdemux->new_media = FALSE;
+ dvdemux->framerate = 0;
+ dvdemux->height = 0;
+ dvdemux->frequency = 0;
+ dvdemux->channels = 0;
+ dvdemux->wide = FALSE;
+
+ for (i = 0; i < 4; i++) {
+ dvdemux->audio_buffers[i] =
+ (gint16 *) g_malloc (DV_AUDIO_MAX_SAMPLES * sizeof (gint16));
+ }
+}
+
+static void
+gst_dvdemux_add_pads (GstDVDemux * dvdemux)
+{
+ dvdemux->videosrcpad =
+ gst_pad_new_from_template (gst_static_pad_template_get (&video_src_temp),
+ "video");
+ gst_pad_set_query_function (dvdemux->videosrcpad,
+ GST_DEBUG_FUNCPTR (gst_dvdemux_src_query));
+ gst_pad_set_query_type_function (dvdemux->videosrcpad,
+ GST_DEBUG_FUNCPTR (gst_dvdemux_get_src_query_types));
+ gst_pad_set_event_function (dvdemux->videosrcpad,
+ GST_DEBUG_FUNCPTR (gst_dvdemux_handle_src_event));
+ gst_pad_use_fixed_caps (dvdemux->videosrcpad);
+ gst_element_add_pad (GST_ELEMENT (dvdemux), dvdemux->videosrcpad);
+
+ dvdemux->audiosrcpad =
+ gst_pad_new_from_template (gst_static_pad_template_get (&audio_src_temp),
+ "audio");
+ gst_pad_set_query_function (dvdemux->audiosrcpad,
+ GST_DEBUG_FUNCPTR (gst_dvdemux_src_query));
+ gst_pad_set_query_type_function (dvdemux->audiosrcpad,
+ GST_DEBUG_FUNCPTR (gst_dvdemux_get_src_query_types));
+ gst_pad_set_event_function (dvdemux->audiosrcpad,
+ GST_DEBUG_FUNCPTR (gst_dvdemux_handle_src_event));
+ gst_pad_use_fixed_caps (dvdemux->audiosrcpad);
+ gst_element_add_pad (GST_ELEMENT (dvdemux), dvdemux->audiosrcpad);
+}
+
+static gboolean
+gst_dvdemux_src_convert (GstPad * pad, GstFormat src_format, gint64 src_value,
+ GstFormat * dest_format, gint64 * dest_value)
+{
+ gboolean res = TRUE;
+ GstDVDemux *dvdemux;
+
+ dvdemux = GST_DVDEMUX (gst_pad_get_parent (pad));
+ if (dvdemux->frame_len == -1)
+ goto error;
+
+ if (dvdemux->decoder == NULL)
+ goto error;
+
+ if (*dest_format == src_format) {
+ *dest_value = src_value;
+ goto done;
+ }
+
+ switch (src_format) {
+ case GST_FORMAT_BYTES:
+ switch (*dest_format) {
+ case GST_FORMAT_BYTES:
+ *dest_value = src_value;
+ break;
+ case GST_FORMAT_DEFAULT:
+ case GST_FORMAT_TIME:
+ *dest_format = GST_FORMAT_TIME;
+ if (pad == dvdemux->videosrcpad)
+ *dest_value = src_value * GST_SECOND /
+ (dvdemux->frame_len * dvdemux->framerate);
+ else if (pad == dvdemux->audiosrcpad)
+ *dest_value = src_value * GST_SECOND /
+ (2 * dvdemux->frequency * dvdemux->channels);
+ break;
+ default:
+ res = FALSE;
+ }
+ break;
+ case GST_FORMAT_TIME:
+ switch (*dest_format) {
+ case GST_FORMAT_BYTES:
+ if (pad == dvdemux->videosrcpad)
+ *dest_value = src_value * dvdemux->frame_len * dvdemux->framerate
+ / GST_SECOND;
+ else if (pad == dvdemux->audiosrcpad)
+ *dest_value = 2 * src_value * dvdemux->frequency *
+ dvdemux->channels / GST_SECOND;
+ break;
+ case GST_FORMAT_TIME:
+ case GST_FORMAT_DEFAULT:
+ *dest_format = GST_FORMAT_TIME;
+ *dest_value = src_value;
+ break;
+ default:
+ res = FALSE;
+ }
+ break;
+ default:
+ res = FALSE;
+ }
+
+done:
+ gst_object_unref (dvdemux);
+
+ return res;
+
+error:
+ {
+ gst_object_unref (dvdemux);
+ return FALSE;
+ }
+}
+
+static gboolean
+gst_dvdemux_sink_convert (GstPad * pad, GstFormat src_format, gint64 src_value,
+ GstFormat * dest_format, gint64 * dest_value)
+{
+ gboolean res = TRUE;
+ GstDVDemux *dvdemux;
+
+ dvdemux = GST_DVDEMUX (gst_pad_get_parent (pad));
+
+ if (dvdemux->frame_len <= 0)
+ goto error;
+
+ GST_DEBUG ("%d -> %d", src_format, *dest_format);
+
+ if (*dest_format == GST_FORMAT_DEFAULT)
+ *dest_format = GST_FORMAT_TIME;
+
+ if (*dest_format == src_format) {
+ *dest_value = src_value;
+ goto done;
+ }
+
+ switch (src_format) {
+ case GST_FORMAT_BYTES:
+ switch (*dest_format) {
+ case GST_FORMAT_TIME:
+ {
+ guint64 frame;
+
+ /* get frame number */
+ frame = src_value / dvdemux->frame_len;
+
+ *dest_value = (frame * GST_SECOND) / dvdemux->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 * dvdemux->framerate / GST_SECOND;
+ /* calculate the offset */
+ *dest_value = frame * dvdemux->frame_len;
+ break;
+ }
+ default:
+ res = FALSE;
+ }
+ break;
+ default:
+ res = FALSE;
+ }
+
+done:
+ gst_object_unref (dvdemux);
+ return res;
+
+error:
+ {
+ gst_object_unref (dvdemux);
+ return FALSE;
+ }
+}
+
+static const GstQueryType *
+gst_dvdemux_get_src_query_types (GstPad * pad)
+{
+ static const GstQueryType src_query_types[] = {
+ GST_QUERY_POSITION,
+ GST_QUERY_CONVERT,
+ 0
+ };
+
+ return src_query_types;
+}
+
+static gboolean
+gst_dvdemux_src_query (GstPad * pad, GstQuery * query)
+{
+ gboolean res = TRUE;
+ GstDVDemux *dvdemux;
+
+ dvdemux = GST_DVDEMUX (gst_pad_get_parent (pad));
+
+ switch (GST_QUERY_TYPE (query)) {
+ case GST_QUERY_POSITION:
+ {
+ GstFormat format;
+ gint64 cur, end;
+ GstPad *peer;
+
+ /* get target format */
+ gst_query_parse_position (query, &format, NULL, NULL);
+
+ /* change query to perform on peer */
+ gst_query_set_position (query, GST_FORMAT_BYTES, -1, -1);
+
+ if ((peer = gst_pad_get_peer (dvdemux->sinkpad))) {
+ /* ask peer for total length */
+ if (!(res = gst_pad_query (peer, query))) {
+ gst_object_unref (peer);
+ goto error;
+ }
+
+ /* get peer total length */
+ gst_query_parse_position (query, NULL, NULL, &end);
+
+ /* convert end to requested format */
+ if (end != -1) {
+ if (!(res = gst_pad_query_convert (dvdemux->sinkpad,
+ GST_FORMAT_BYTES, end, &format, &end))) {
+ gst_object_unref (peer);
+ goto error;
+ }
+ }
+ gst_object_unref (peer);
+ } else {
+ end = -1;
+ }
+ /* bring the position to the requested format. */
+ if (!(res = gst_pad_query_convert (pad,
+ GST_FORMAT_TIME, dvdemux->timestamp, &format, &cur)))
+ goto error;
+
+ gst_query_set_position (query, format, cur, end);
+ break;
+ }
+ case GST_QUERY_CONVERT:
+ {
+ GstFormat src_fmt, dest_fmt;
+ gint64 src_val, dest_val;
+
+ gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
+ if (!(res =
+ gst_dvdemux_src_convert (pad, src_fmt, src_val, &dest_fmt,
+ &dest_val)))
+ goto error;
+ gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
+ break;
+ }
+ default:
+ res = FALSE;
+ break;
+ }
+ gst_object_unref (dvdemux);
+
+ return res;
+
+error:
+ {
+ gst_object_unref (dvdemux);
+ GST_DEBUG ("error handling event");
+ return FALSE;
+ }
+}
+
+static const GstQueryType *
+gst_dvdemux_get_sink_query_types (GstPad * pad)
+{
+ static const GstQueryType sink_query_types[] = {
+ GST_QUERY_CONVERT,
+ 0
+ };
+
+ return sink_query_types;
+}
+
+static gboolean
+gst_dvdemux_sink_query (GstPad * pad, GstQuery * query)
+{
+ gboolean res = TRUE;
+ GstDVDemux *dvdemux;
+
+ dvdemux = GST_DVDEMUX (gst_pad_get_parent (pad));
+
+ switch (GST_QUERY_TYPE (query)) {
+ case GST_QUERY_CONVERT:
+ {
+ GstFormat src_fmt, dest_fmt;
+ gint64 src_val, dest_val;
+
+ gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
+ if (!(res =
+ gst_dvdemux_sink_convert (pad, src_fmt, src_val, &dest_fmt,
+ &dest_val)))
+ goto error;
+ gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
+ break;
+ }
+ default:
+ res = FALSE;
+ break;
+ }
+ gst_object_unref (dvdemux);
+
+ return res;
+
+error:
+ {
+ gst_object_unref (dvdemux);
+ GST_DEBUG ("error handling event");
+ return FALSE;
+ }
+}
+
+static gboolean
+gst_dvdemux_send_event (GstDVDemux * dvdemux, GstEvent * event)
+{
+ gboolean res = FALSE;
+
+ gst_event_ref (event);
+ if (dvdemux->videosrcpad)
+ res |= gst_pad_push_event (dvdemux->videosrcpad, event);
+ if (dvdemux->audiosrcpad)
+ res |= gst_pad_push_event (dvdemux->audiosrcpad, event);
+
+ return res;
+}
+
+static gboolean
+gst_dvdemux_handle_sink_event (GstPad * pad, GstEvent * event)
+{
+ GstDVDemux *dvdemux = GST_DVDEMUX (gst_pad_get_parent (pad));
+ gboolean res = TRUE;
+
+ switch (GST_EVENT_TYPE (event)) {
+ case GST_EVENT_FLUSH_START:
+ /* we are not blocking on anything exect the push() calls
+ * to the peer which will be unblocked by forwarding the
+ * event.*/
+ res = gst_dvdemux_send_event (dvdemux, event);
+
+ /* and wait till streaming stops, not strictly needed as
+ * the peer calling us will do the same. */
+ GST_STREAM_LOCK (pad);
+ GST_STREAM_UNLOCK (pad);
+ break;
+ case GST_EVENT_FLUSH_STOP:
+ GST_STREAM_LOCK (pad);
+ gst_adapter_clear (dvdemux->adapter);
+ GST_DEBUG ("cleared adapter");
+ res = gst_dvdemux_send_event (dvdemux, event);
+ GST_STREAM_UNLOCK (pad);
+ break;
+ case GST_EVENT_NEWSEGMENT:
+ {
+ GstFormat format;
+
+ GST_STREAM_LOCK (pad);
+
+ /* parse byte start and stop positions */
+ gst_event_parse_newsegment (event, NULL, &format,
+ &dvdemux->start_byte, &dvdemux->stop_byte, NULL);
+
+ /* and queue a DISCONT before sending the next set of buffers */
+ dvdemux->need_discont = TRUE;
+ gst_event_unref (event);
+ GST_STREAM_UNLOCK (pad);
+ break;
+ }
+ case GST_EVENT_EOS:
+ default:
+ GST_STREAM_LOCK (pad);
+ /* flush any pending data */
+ gst_dvdemux_flush (dvdemux);
+ /* forward event */
+ res = gst_dvdemux_send_event (dvdemux, event);
+ /* and clear the adapter */
+ gst_adapter_clear (dvdemux->adapter);
+ GST_STREAM_UNLOCK (pad);
+ break;
+ }
+
+ gst_object_unref (dvdemux);
+
+ return res;
+}
+
+static gboolean
+gst_dvdemux_handle_src_event (GstPad * pad, GstEvent * event)
+{
+ gboolean res = TRUE;
+ GstDVDemux *dvdemux;
+
+ dvdemux = GST_DVDEMUX (gst_pad_get_parent (pad));
+
+ switch (GST_EVENT_TYPE (event)) {
+ case GST_EVENT_SEEK:
+ {
+ GstEvent *newevent;
+ gint64 offset;
+ GstFormat format, conv;
+ gint64 cur, stop;
+ gdouble rate;
+ GstSeekType cur_type, stop_type;
+ GstSeekFlags flags;
+ gint64 start_position, end_position;
+
+ gst_event_parse_seek (event, &rate, &format, &flags,
+ &cur_type, &cur, &stop_type, &stop);
+
+ if ((offset = cur) != -1) {
+ /* bring the format to time on srcpad. */
+ conv = GST_FORMAT_TIME;
+ if (!(res = gst_pad_query_convert (pad,
+ format, offset, &conv, &start_position))) {
+ /* could not convert seek format to time offset */
+ break;
+ }
+ /* and convert to bytes on sinkpad. */
+ conv = GST_FORMAT_BYTES;
+ if (!(res = gst_pad_query_convert (dvdemux->sinkpad,
+ GST_FORMAT_TIME, start_position, &conv, &start_position))) {
+ /* could not convert time format to bytes offset */
+ break;
+ }
+ } else {
+ start_position = -1;
+ }
+
+ if ((offset = stop) != -1) {
+ /* bring the format to time on srcpad. */
+ conv = GST_FORMAT_TIME;
+ if (!(res = gst_pad_query_convert (pad,
+ format, offset, &conv, &end_position))) {
+ /* could not convert seek format to time offset */
+ break;
+ }
+ conv = GST_FORMAT_BYTES;
+ /* and convert to bytes on sinkpad. */
+ if (!(res = gst_pad_query_convert (dvdemux->sinkpad,
+ GST_FORMAT_TIME, end_position, &conv, &end_position))) {
+ /* could not convert seek format to bytes offset */
+ break;
+ }
+ } else {
+ end_position = -1;
+ }
+ /* now this is the updated seek event on bytes */
+ newevent = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
+ cur_type, start_position, stop_type, end_position);
+
+ res = gst_pad_push_event (dvdemux->sinkpad, newevent);
+ break;
+ }
+ default:
+ res = FALSE;
+ break;
+ }
+ gst_event_unref (event);
+
+ gst_object_unref (dvdemux);
+
+ return res;
+}
+
+static GstFlowReturn
+gst_dvdemux_demux_audio (GstDVDemux * dvdemux, const guint8 * data)
+{
+ gint num_samples;
+ gint frequency, channels;
+ GstFlowReturn ret;
+
+ frequency = dv_get_frequency (dvdemux->decoder);
+ channels = dv_get_num_channels (dvdemux->decoder);
+
+ /* check if format changed */
+ if ((frequency != dvdemux->frequency) || (channels != dvdemux->channels)) {
+ GstCaps *caps;
+
+ dvdemux->frequency = frequency;
+ dvdemux->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_BYTE_ORDER, NULL);
+ gst_pad_set_caps (dvdemux->audiosrcpad, caps);
+ gst_caps_unref (caps);
+ }
+
+ dv_decode_full_audio (dvdemux->decoder, data, dvdemux->audio_buffers);
+
+ if ((num_samples = dv_get_num_samples (dvdemux->decoder)) > 0) {
+ gint16 *a_ptr;
+ gint i, j;
+ GstBuffer *outbuf;
+
+ outbuf = gst_buffer_new_and_alloc (num_samples *
+ sizeof (gint16) * dvdemux->channels);
+
+ a_ptr = (gint16 *) GST_BUFFER_DATA (outbuf);
+
+ for (i = 0; i < num_samples; i++) {
+ for (j = 0; j < dvdemux->channels; j++) {
+ *(a_ptr++) = dvdemux->audio_buffers[j][i];
+ }
+ }
+
+ GST_DEBUG ("pushing audio %" GST_TIME_FORMAT,
+ GST_TIME_ARGS (dvdemux->timestamp));
+
+ GST_BUFFER_TIMESTAMP (outbuf) = dvdemux->timestamp;
+ GST_BUFFER_DURATION (outbuf) = dvdemux->duration;
+ GST_BUFFER_OFFSET (outbuf) = dvdemux->audio_offset;
+ dvdemux->audio_offset += num_samples;
+ GST_BUFFER_OFFSET_END (outbuf) = dvdemux->audio_offset;
+
+ gst_buffer_set_caps (outbuf, GST_PAD_CAPS (dvdemux->audiosrcpad));
+
+ ret = gst_pad_push (dvdemux->audiosrcpad, outbuf);
+ } else {
+ /* no samples */
+ ret = GST_FLOW_OK;
+ }
+
+ return ret;
+}
+
+static GstFlowReturn
+gst_dvdemux_demux_video (GstDVDemux * dvdemux, const guint8 * data)
+{
+ GstBuffer *outbuf;
+ gint height;
+ gboolean wide;
+ GstFlowReturn ret = GST_FLOW_OK;
+
+ /* get params */
+ /* framerate is already up-to-date */
+ height = (dvdemux->PAL ? PAL_HEIGHT : NTSC_HEIGHT);
+ wide = dv_format_wide (dvdemux->decoder);
+
+ /* see if anything changed */
+ if ((dvdemux->height != height) || dvdemux->wide != wide) {
+ GstCaps *caps;
+ gint par_x, par_y;
+
+ dvdemux->height = height;
+ dvdemux->wide = wide;
+
+ if (dvdemux->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;
+ }
+ }
+
+ caps = gst_caps_new_simple ("video/x-dv",
+ "systemstream", G_TYPE_BOOLEAN, FALSE,
+ "width", G_TYPE_INT, 720,
+ "height", G_TYPE_INT, height,
+ "framerate", G_TYPE_DOUBLE, dvdemux->framerate,
+ "pixel-aspect-ratio", GST_TYPE_FRACTION, par_x, par_y, NULL);
+ gst_pad_set_caps (dvdemux->videosrcpad, caps);
+ gst_caps_unref (caps);
+ }
+
+ outbuf = gst_buffer_new ();
+
+ /* won't get freed, but still callers should not hold a ref on the buffer --
+ need to figure out how to do that in gst core */
+ gst_buffer_set_data (outbuf, (guint8 *) data, dvdemux->frame_len);
+
+ GST_BUFFER_TIMESTAMP (outbuf) = dvdemux->timestamp;
+ GST_BUFFER_OFFSET (outbuf) = dvdemux->video_offset;
+ GST_BUFFER_OFFSET_END (outbuf) = dvdemux->video_offset + 1;
+ GST_BUFFER_DURATION (outbuf) = dvdemux->duration;
+
+ gst_buffer_set_caps (outbuf, GST_PAD_CAPS (dvdemux->videosrcpad));
+
+ GST_DEBUG ("pushing video %" GST_TIME_FORMAT,
+ GST_TIME_ARGS (dvdemux->timestamp));
+
+ ret = gst_pad_push (dvdemux->videosrcpad, outbuf);
+
+ dvdemux->video_offset++;
+
+ return ret;
+}
+
+static GstFlowReturn
+gst_dvdemux_demux_frame (GstDVDemux * dvdemux, const guint8 * data)
+{
+ GstClockTime next_ts;
+ GstFlowReturn aret, vret, ret;
+
+ if (dvdemux->need_discont) {
+ GstEvent *event;
+ GstFormat format;
+ gboolean res;
+
+ /* convert to time and store as start/end_timestamp */
+ format = GST_FORMAT_TIME;
+ if (!(res = gst_pad_query_convert (dvdemux->sinkpad,
+ GST_FORMAT_BYTES,
+ dvdemux->start_byte, &format, &dvdemux->start_timestamp))) {
+ goto discont_error;
+ }
+
+ dvdemux->timestamp = dvdemux->start_timestamp;
+
+ format = GST_FORMAT_TIME;
+ if (!(res = gst_pad_query_convert (dvdemux->sinkpad,
+ GST_FORMAT_BYTES,
+ dvdemux->stop_byte, &format, &dvdemux->stop_timestamp))) {
+ goto discont_error;
+ }
+
+ event = gst_event_new_newsegment (1.0, GST_FORMAT_TIME,
+ dvdemux->start_timestamp, dvdemux->stop_timestamp, 0);
+ gst_dvdemux_send_event (dvdemux, event);
+
+ dvdemux->need_discont = FALSE;
+ }
+
+ next_ts = dvdemux->timestamp + GST_SECOND / dvdemux->framerate;
+ dvdemux->duration = next_ts - dvdemux->timestamp;
+
+ dv_parse_packs (dvdemux->decoder, data);
+ if (dv_is_new_recording (dvdemux->decoder, data))
+ dvdemux->new_media = TRUE;
+
+ aret = ret = gst_dvdemux_demux_audio (dvdemux, data);
+ if (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED)
+ goto done;
+
+ vret = ret = gst_dvdemux_demux_video (dvdemux, data);
+ if (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED)
+ goto done;
+
+ if (aret == GST_FLOW_NOT_LINKED && vret == GST_FLOW_NOT_LINKED) {
+ ret = GST_FLOW_NOT_LINKED;
+ goto done;
+ }
+
+ ret = GST_FLOW_OK;
+ dvdemux->timestamp = next_ts;
+
+done:
+ return ret;
+
+discont_error:
+ {
+ GST_DEBUG ("error generating discont event");
+ return GST_FLOW_ERROR;
+ }
+}
+
+/* flush any remaining data in the adapter */
+static GstFlowReturn
+gst_dvdemux_flush (GstDVDemux * dvdemux)
+{
+ GstFlowReturn ret = GST_FLOW_OK;
+
+ while (gst_adapter_available (dvdemux->adapter) >= dvdemux->frame_len) {
+ const guint8 *data;
+ gint length;
+
+ /* get the accumulated bytes */
+ data = gst_adapter_peek (dvdemux->adapter, dvdemux->frame_len);
+
+ /* parse header to know the length and other params */
+ if (dv_parse_header (dvdemux->decoder, data) < 0)
+ goto parse_header_error;
+
+ dvdemux->found_header = TRUE;
+
+ /* after parsing the header we know the length of the data */
+ dvdemux->PAL = dv_system_50_fields (dvdemux->decoder);
+ length = dvdemux->frame_len = (dvdemux->PAL ? PAL_BUFFER : NTSC_BUFFER);
+ dvdemux->framerate = dvdemux->PAL ? PAL_FRAMERATE : NTSC_FRAMERATE;
+ /* let demux_video set the height, it needs to detect when things change so
+ * it can reset caps */
+
+ /* if we still have enough for a frame, start decoding */
+ if (gst_adapter_available (dvdemux->adapter) >= length) {
+
+ data = gst_adapter_peek (dvdemux->adapter, length);
+
+ /* and decode the data */
+ ret = gst_dvdemux_demux_frame (dvdemux, data);
+
+ gst_adapter_flush (dvdemux->adapter, length);
+
+ if (ret != GST_FLOW_OK)
+ goto done;
+ }
+ }
+done:
+ return ret;
+
+ /* ERRORS */
+parse_header_error:
+ {
+ GST_ELEMENT_ERROR (dvdemux, STREAM, DECODE,
+ ("Error parsing DV header"), ("Error parsing DV header"));
+ gst_object_unref (dvdemux);
+
+ return GST_FLOW_ERROR;
+ }
+}
+
+/* streaming operation:
+ *
+ * accumulate data until we have a frame, then decode.
+ */
+static GstFlowReturn
+gst_dvdemux_chain (GstPad * pad, GstBuffer * buffer)
+{
+ GstDVDemux *dvdemux;
+ GstFlowReturn ret;
+
+ dvdemux = GST_DVDEMUX (gst_pad_get_parent (pad));
+
+ gst_adapter_push (dvdemux->adapter, buffer);
+
+ /* Apparently dv_parse_header can read from the body of the frame
+ * too, so it needs more than header_size bytes. Wacky!
+ */
+ if (dvdemux->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 */
+ dvdemux->frame_len = NTSC_BUFFER;
+ }
+
+ /* and try to flush pending frames */
+ ret = gst_dvdemux_flush (dvdemux);
+
+ gst_object_unref (dvdemux);
+
+ return ret;
+}
+
+static GstElementStateReturn
+gst_dvdemux_change_state (GstElement * element)
+{
+ GstDVDemux *dvdemux = GST_DVDEMUX (element);
+ GstElementStateReturn ret;
+ gint transition;
+
+ transition = GST_STATE_TRANSITION (element);
+
+ switch (transition) {
+ case GST_STATE_NULL_TO_READY:
+ if (!dvdemux->videosrcpad)
+ gst_dvdemux_add_pads (dvdemux);
+ break;
+ case GST_STATE_READY_TO_PAUSED:
+ dvdemux->decoder = dv_decoder_new (0, FALSE, FALSE);
+ dvdemux->audio_offset = 0;
+ dvdemux->video_offset = 0;
+ dvdemux->framecount = 0;
+ dvdemux->found_header = FALSE;
+ dvdemux->frame_len = -1;
+ 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 (dvdemux->adapter);
+ dv_decoder_free (dvdemux->decoder);
+ dvdemux->decoder = NULL;
+ break;
+ case GST_STATE_READY_TO_NULL:
+ break;
+ default:
+ break;
+ }
+ return ret;
+}
projects / platform / upstream / gstreamer.git / commitdiff