gstreamer/gst/invtelecine/gstinvtelecine.c
2010-09-18 19:27:07 -07:00

966 lines
26 KiB
C

/* GStreamer
* Copyright (C) 2010 David A. Schleef <ds@schleef.org>
*
* 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 <gst/gst.h>
#include <gst/video/video.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
GST_DEBUG_CATEGORY (gst_invtelecine_debug);
#define GST_CAT_DEFAULT gst_invtelecine_debug
#define GST_TYPE_INVTELECINE \
(gst_invtelecine_get_type())
#define GST_INVTELECINE(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_INVTELECINE,GstInvtelecine))
#define GST_INVTELECINE_DEC_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_INVTELECINE,GstInvtelecineClass))
#define GST_IS_GST_INVTELECINE(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_INVTELECINE))
#define GST_IS_GST_INVTELECINE_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_INVTELECINE))
typedef struct _GstInvtelecine GstInvtelecine;
typedef struct _GstInvtelecineClass GstInvtelecineClass;
typedef struct _Field Field;
#define FIFO_SIZE 20
struct _Field
{
GstBuffer *buffer;
int field_index;
double prev;
double prev1;
double prev2;
double prev3;
};
struct _GstInvtelecine
{
GstElement element;
GstPad *srcpad;
GstPad *sinkpad;
/* properties */
gboolean verify_field_flags;
/* state */
int next_field;
int num_fields;
int field;
gboolean locked;
int last_lock;
int phase;
Field fifo[FIFO_SIZE];
int width;
int height;
GstVideoFormat format;
gboolean interlaced;
double bad_flag_metric;
};
struct _GstInvtelecineClass
{
GstElementClass element_class;
};
enum
{
ARG_0,
PROP_VERIFY_FIELD_FLAGS
};
static GstStaticPadTemplate gst_invtelecine_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("{YUY2,UYVY,I420,YV12}")
)
);
static GstStaticPadTemplate gst_invtelecine_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("{YUY2,UYVY,I420,YV12}")
)
);
static void gst_invtelecine_base_init (gpointer g_class);
static void gst_invtelecine_class_init (GstInvtelecineClass * klass);
static void gst_invtelecine_init (GstInvtelecine * invtelecine);
static GstFlowReturn gst_invtelecine_chain (GstPad * pad, GstBuffer * buffer);
static void gst_invtelecine_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_invtelecine_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static gboolean gst_invtelecine_setcaps (GstPad * pad, GstCaps * caps);
static GstStateChangeReturn gst_invtelecine_change_state (GstElement * element,
GstStateChange transition);
static GstElementClass *parent_class = NULL;
static GstFlowReturn
gst_invtelecine_output_fields (GstInvtelecine * invtelecine, int num_fields);
static GType
gst_invtelecine_get_type (void)
{
static GType invtelecine_type = 0;
if (!invtelecine_type) {
static const GTypeInfo invtelecine_info = {
sizeof (GstInvtelecineClass),
gst_invtelecine_base_init,
NULL,
(GClassInitFunc) gst_invtelecine_class_init,
NULL,
NULL,
sizeof (GstInvtelecine),
0,
(GInstanceInitFunc) gst_invtelecine_init,
};
invtelecine_type = g_type_register_static (GST_TYPE_ELEMENT,
"GstInvtelecine", &invtelecine_info, 0);
}
return invtelecine_type;
}
static void
gst_invtelecine_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details_simple (element_class,
"Inverse Telecine filter", "Filter/Video",
"Detects and reconstructs progressive content from telecine video",
"Entropy Wave <ds@entropywave.com>");
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_invtelecine_sink_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_invtelecine_src_template));
}
static void
gst_invtelecine_class_init (GstInvtelecineClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
object_class->set_property = gst_invtelecine_set_property;
object_class->get_property = gst_invtelecine_get_property;
element_class->change_state = gst_invtelecine_change_state;
g_object_class_install_property (object_class, PROP_VERIFY_FIELD_FLAGS,
g_param_spec_boolean ("verify-field-flags", "verify field flags",
"Verify that field dominance (top/bottom field first) buffer "
"flags are correct", FALSE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}
static void
gst_invtelecine_init (GstInvtelecine * invtelecine)
{
GST_DEBUG ("gst_invtelecine_init");
invtelecine->sinkpad =
gst_pad_new_from_static_template (&gst_invtelecine_sink_template, "sink");
gst_element_add_pad (GST_ELEMENT (invtelecine), invtelecine->sinkpad);
gst_pad_set_chain_function (invtelecine->sinkpad, gst_invtelecine_chain);
gst_pad_set_setcaps_function (invtelecine->sinkpad, gst_invtelecine_setcaps);
invtelecine->srcpad =
gst_pad_new_from_static_template (&gst_invtelecine_src_template, "src");
gst_element_add_pad (GST_ELEMENT (invtelecine), invtelecine->srcpad);
invtelecine->bad_flag_metric = 1.0;
invtelecine->verify_field_flags = FALSE;
}
static gboolean
gst_invtelecine_setcaps (GstPad * pad, GstCaps * caps)
{
GstInvtelecine *invtelecine;
gboolean ret;
int width, height;
GstVideoFormat format;
gboolean interlaced = TRUE;
int fps_n, fps_d;
invtelecine = GST_INVTELECINE (gst_pad_get_parent (pad));
ret = gst_video_format_parse_caps (caps, &format, &width, &height);
gst_video_format_parse_caps_interlaced (caps, &interlaced);
ret &= gst_video_parse_caps_framerate (caps, &fps_n, &fps_d);
if (ret) {
GstCaps *srccaps = gst_caps_copy (caps);
ret = gst_pad_set_caps (invtelecine->srcpad, srccaps);
}
if (ret) {
invtelecine->format = format;
invtelecine->width = width;
invtelecine->height = height;
invtelecine->interlaced = interlaced;
}
g_object_unref (invtelecine);
return ret;
}
#define MAX_FIELD_SCORE 100
static double
gst_invtelecine_compare_fields (GstInvtelecine * invtelecine, int field1,
int field2)
{
int i;
int j;
guint8 *data1;
guint8 *data2_1;
guint8 *data2_2;
int field_index;
int have;
int vave;
int hdiff;
int vdiff;
double sum;
double linesum;
double den;
if (field1 < 0 || field2 < 0)
return MAX_FIELD_SCORE;
if (invtelecine->fifo[field1].buffer == NULL ||
invtelecine->fifo[field2].buffer == NULL)
return MAX_FIELD_SCORE;
if (invtelecine->fifo[field1].buffer == invtelecine->fifo[field2].buffer &&
invtelecine->fifo[field1].field_index ==
invtelecine->fifo[field2].field_index) {
return 0;
}
sum = 0;
field_index = invtelecine->fifo[field1].field_index;
for (j = field_index; j < invtelecine->height; j += 2) {
if (j == 0 || j == invtelecine->height - 1)
continue;
if (invtelecine->format == GST_VIDEO_FORMAT_I420 ||
invtelecine->format == GST_VIDEO_FORMAT_YV12) {
data1 = GST_BUFFER_DATA (invtelecine->fifo[field1].buffer) +
invtelecine->width * j;
data2_1 =
GST_BUFFER_DATA (invtelecine->fifo[field2].buffer) +
invtelecine->width * (j - 1);
data2_2 =
GST_BUFFER_DATA (invtelecine->fifo[field2].buffer) +
invtelecine->width * (j + 1);
/* planar 4:2:0 */
linesum = 0;
for (i = 1; i < invtelecine->width - 1; i++) {
have = data1[i - 1] + data1[i + 1];
hdiff = abs (data1[i - 1] - data1[i + 1]);
vave = data2_1[i] + data2_2[i];
vdiff = abs (data2_1[i] - data2_2[i]);
den = MAX (1, MAX (hdiff, vdiff));
linesum += (have - vave) * (have - vave) / (den * den);
}
} else {
data1 = GST_BUFFER_DATA (invtelecine->fifo[field1].buffer) +
invtelecine->width * 2 * j;
data2_1 =
GST_BUFFER_DATA (invtelecine->fifo[field2].buffer) +
invtelecine->width * 2 * (j - 1);
data2_2 =
GST_BUFFER_DATA (invtelecine->fifo[field2].buffer) +
invtelecine->width * 2 * (j + 1);
if (invtelecine->format == GST_VIDEO_FORMAT_UYVY) {
data1++;
data2_1++;
data2_2++;
}
/* packed 4:2:2 */
linesum = 0;
for (i = 1; i < invtelecine->width - 1; i++) {
have = data1[(i - 1) * 2] + data1[(i + 1) * 2];
hdiff = abs (data1[(i - 1) * 2] - data1[(i + 1) * 2]);
vave = data2_1[i * 2] + data2_2[i * 2];
vdiff = abs (data2_1[i * 2] - data2_2[i * 2]);
den = MAX (1, MAX (hdiff, vdiff));
linesum += (have - vave) * (have - vave) / (den * den);
}
}
sum += linesum;
}
sum /= (invtelecine->width * invtelecine->height / 2);
return MIN (sum, MAX_FIELD_SCORE);
}
static double
gst_invtelecine_compare_fields_mse (GstInvtelecine * invtelecine, int field1,
int field2)
{
int i;
int j;
guint8 *data1;
guint8 *data2;
int field_index1;
int field_index2;
int diff;
double sum;
double linesum;
if (field1 < 0 || field2 < 0)
return MAX_FIELD_SCORE;
if (invtelecine->fifo[field1].buffer == NULL ||
invtelecine->fifo[field2].buffer == NULL)
return MAX_FIELD_SCORE;
if (invtelecine->fifo[field1].buffer == invtelecine->fifo[field2].buffer &&
invtelecine->fifo[field1].field_index ==
invtelecine->fifo[field2].field_index) {
return 0;
}
sum = 0;
field_index1 = invtelecine->fifo[field1].field_index;
field_index2 = invtelecine->fifo[field2].field_index;
if (invtelecine->format == GST_VIDEO_FORMAT_I420 ||
invtelecine->format == GST_VIDEO_FORMAT_YV12) {
for (j = 0; j < invtelecine->height; j += 2) {
data1 = GST_BUFFER_DATA (invtelecine->fifo[field1].buffer) +
invtelecine->width * (j + field_index1);
data2 = GST_BUFFER_DATA (invtelecine->fifo[field2].buffer) +
invtelecine->width * (j + field_index2);
linesum = 0;
for (i = 0; i < invtelecine->width; i++) {
diff = (data1[i] - data2[i]);
linesum += diff * diff;
}
sum += linesum;
}
} else {
for (j = 0; j < invtelecine->height; j += 2) {
data1 = GST_BUFFER_DATA (invtelecine->fifo[field1].buffer) +
invtelecine->width * 2 * (j + field_index1);
data2 = GST_BUFFER_DATA (invtelecine->fifo[field2].buffer) +
invtelecine->width * 2 * (j + field_index2);
if (invtelecine->format == GST_VIDEO_FORMAT_UYVY) {
data1++;
data2++;
}
linesum = 0;
for (i = 0; i < invtelecine->width; i++) {
diff = (data1[i * 2] - data2[i * 2]);
linesum += diff * diff;
}
sum += linesum;
}
}
sum /= invtelecine->width * invtelecine->height / 2;
//return MIN (sum, MAX_FIELD_SCORE);
return sum;
}
static double
gst_invtelecine_compare_fields_mse_ave (GstInvtelecine * invtelecine,
int field1, int field2)
{
int i;
int j;
guint8 *data1;
guint8 *data2_1;
guint8 *data2_2;
int field_index1;
int field_index2;
double diff;
double sum;
double linesum;
#define MAX_FIELD_SCORE_2 1e9
if (field1 < 0 || field2 < 0)
return MAX_FIELD_SCORE_2;
if (invtelecine->fifo[field1].buffer == NULL ||
invtelecine->fifo[field2].buffer == NULL)
return MAX_FIELD_SCORE_2;
if (invtelecine->fifo[field1].buffer == invtelecine->fifo[field2].buffer &&
invtelecine->fifo[field1].field_index ==
invtelecine->fifo[field2].field_index) {
return 0;
}
sum = 0;
field_index1 = invtelecine->fifo[field1].field_index;
field_index2 = invtelecine->fifo[field2].field_index;
if (invtelecine->format == GST_VIDEO_FORMAT_I420 ||
invtelecine->format == GST_VIDEO_FORMAT_YV12) {
for (j = 0; j < invtelecine->height; j += 2) {
if (j + field_index1 == 0 || j + field_index1 == invtelecine->height - 1)
continue;
data1 = GST_BUFFER_DATA (invtelecine->fifo[field1].buffer) +
invtelecine->width * (j + field_index1);
data2_1 = GST_BUFFER_DATA (invtelecine->fifo[field2].buffer) +
invtelecine->width * (j + field_index1 - 1);
data2_2 = GST_BUFFER_DATA (invtelecine->fifo[field2].buffer) +
invtelecine->width * (j + field_index1 + 1);
linesum = 0;
for (i = 0; i < invtelecine->width; i++) {
diff = (data1[i] - (data2_1[i] + data2_2[i]) / 2);
diff *= diff;
linesum += diff * diff;
}
sum += linesum;
}
} else {
for (j = 0; j < invtelecine->height; j += 2) {
if (j + field_index1 == 0 || j + field_index1 == invtelecine->height - 1)
continue;
data1 = GST_BUFFER_DATA (invtelecine->fifo[field1].buffer) +
invtelecine->width * 2 * (j + field_index1);
data2_1 = GST_BUFFER_DATA (invtelecine->fifo[field2].buffer) +
invtelecine->width * 2 * (j + field_index1 - 1);
data2_2 = GST_BUFFER_DATA (invtelecine->fifo[field2].buffer) +
invtelecine->width * 2 * (j + field_index1 + 1);
if (invtelecine->format == GST_VIDEO_FORMAT_UYVY) {
data1++;
data2_1++;
data2_2++;
}
linesum = 0;
for (i = 0; i < invtelecine->width; i++) {
diff = (data1[i] - (data2_1[i] + data2_2[i]) / 2);
diff *= diff;
linesum += diff * diff;
}
sum += linesum;
}
}
sum /= invtelecine->width * (invtelecine->height / 2 - 1);
g_assert (sum > 0);
//return MIN (sum, MAX_FIELD_SCORE);
return sqrt (sum);
}
static void
gst_invtelecine_push_field (GstInvtelecine * invtelecine, GstBuffer * buffer,
int field_index)
{
int i;
g_assert (invtelecine->num_fields < FIFO_SIZE - 1);
g_assert (invtelecine->num_fields >= 0);
i = invtelecine->num_fields;
invtelecine->num_fields++;
GST_DEBUG ("ref %p", buffer);
invtelecine->fifo[i].buffer = gst_buffer_ref (buffer);
invtelecine->fifo[i].field_index = field_index;
invtelecine->fifo[i].prev =
gst_invtelecine_compare_fields (invtelecine, i, i - 1);
invtelecine->fifo[i].prev2 =
gst_invtelecine_compare_fields_mse (invtelecine, i, i - 2);
if (invtelecine->verify_field_flags) {
invtelecine->fifo[i].prev3 =
gst_invtelecine_compare_fields_mse_ave (invtelecine, i, i - 3);
invtelecine->fifo[i].prev1 =
gst_invtelecine_compare_fields_mse_ave (invtelecine, i, i - 1);
#define ALPHA 0.2
if (invtelecine->fifo[i].prev3 != 0) {
invtelecine->bad_flag_metric *= (1 - ALPHA);
invtelecine->bad_flag_metric +=
ALPHA * (invtelecine->fifo[i].prev1 / invtelecine->fifo[i].prev3);
}
#if 0
g_print ("42 %g %g %g\n", invtelecine->bad_flag_metric,
invtelecine->fifo[i].prev1, invtelecine->fifo[i].prev3);
#endif
if (invtelecine->bad_flag_metric > 1.2) {
GST_WARNING ("bad field flags? metric %g > 1.2",
invtelecine->bad_flag_metric);
}
}
}
int pulldown_2_3[] = { 2, 3 };
typedef struct _PulldownFormat PulldownFormat;
struct _PulldownFormat
{
const char *name;
int cycle_length;
int n_fields[10];
};
static const PulldownFormat formats[] = {
/* interlaced */
{"interlaced", 1, {1}},
/* 30p */
{"2:2", 2, {2}},
/* 24p */
{"3:2", 5, {2, 3,}},
};
static int
get_score_2 (GstInvtelecine * invtelecine, int format_index, int phase)
{
const PulldownFormat *format = formats + format_index;
int field_index;
int k;
int i;
int score;
GST_DEBUG ("score2 format_index %d phase %d", format_index, phase);
phase = (invtelecine->field + phase) % format->cycle_length;
field_index = 0;
k = 0;
while (phase > 0) {
field_index++;
if (field_index >= format->n_fields[k]) {
field_index = 0;
k++;
if (format->n_fields[k] == 0) {
k = 0;
}
}
phase--;
}
/* k is the frame index in the format */
/* field_index is the field index in the frame */
score = 0;
for (i = 0; i < 15; i++) {
if (field_index == 0) {
if (invtelecine->fifo[i].prev > 50) {
/* Strong picture change signal */
score++;
}
} else {
if (invtelecine->fifo[i].prev > 50) {
/* A secondary field with visible combing */
score -= 5;
} else if (field_index == 1) {
if (invtelecine->fifo[i].prev > 5) {
score--;
} else if (invtelecine->fifo[i].prev < 3) {
/* In the noise */
score++;
}
} else {
if (invtelecine->fifo[i].prev2 < 1) {
score += 2;
}
if (invtelecine->fifo[i].prev2 > 10) {
/* A tertiary field that doesn't match */
score -= 5;
}
}
}
GST_DEBUG ("i=%d phase=%d fi=%d prev=%g score=%d", i, phase, field_index,
invtelecine->fifo[i].prev, score);
field_index++;
if (field_index >= format->n_fields[k]) {
field_index = 0;
k++;
if (format->n_fields[k] == 0) {
k = 0;
}
}
}
return score;
}
int format_table[] = { 0, 1, 1, 2, 2, 2, 2, 2 };
int phase_table[] = { 0, 0, 1, 0, 1, 2, 3, 4 };
static void
gst_invtelecine_process (GstInvtelecine * invtelecine, gboolean flush)
{
//int score;
int num_fields;
int scores[8];
int i;
int max_i;
//int format;
int phase;
GST_DEBUG ("process %d", invtelecine->num_fields);
while (invtelecine->num_fields > 15) {
num_fields = 0;
for (i = 0; i < 8; i++) {
scores[i] = get_score_2 (invtelecine, format_table[i], phase_table[i]);
}
#if 0
g_print ("scores %d %d %d %d %d %d %d %d %d\n", invtelecine->field,
scores[0], scores[1], scores[2], scores[3],
scores[4], scores[5], scores[6], scores[7]);
#endif
max_i = invtelecine->last_lock;
for (i = 0; i < 8; i++) {
int field_index;
int k;
phase = (invtelecine->field + phase_table[i]) %
formats[format_table[i]].cycle_length;
field_index = 0;
k = 0;
while (phase > 0) {
field_index++;
if (field_index >= formats[format_table[i]].n_fields[k]) {
field_index = 0;
k++;
if (formats[format_table[i]].n_fields[k] == 0) {
k = 0;
}
}
phase--;
}
if (field_index == 0) {
if (scores[i] > scores[max_i]) {
max_i = i;
}
}
}
if (max_i != invtelecine->last_lock) {
GST_WARNING ("new structure %s, phase %d",
formats[format_table[max_i]].name, phase_table[max_i]);
invtelecine->last_lock = max_i;
}
{
int field_index;
int k;
phase = (invtelecine->field + phase_table[max_i]) %
formats[format_table[max_i]].cycle_length;
field_index = 0;
k = 0;
while (phase > 0) {
field_index++;
if (field_index >= formats[format_table[max_i]].n_fields[k]) {
field_index = 0;
k++;
if (formats[format_table[max_i]].n_fields[k] == 0) {
k = 0;
}
}
phase--;
}
num_fields = formats[format_table[max_i]].n_fields[k];
}
if (num_fields == 0) {
GST_WARNING ("unlocked");
num_fields = 1;
}
gst_invtelecine_output_fields (invtelecine, num_fields);
while (num_fields > 0) {
GST_DEBUG ("unref %p", invtelecine->fifo[0].buffer);
gst_buffer_unref (invtelecine->fifo[0].buffer);
invtelecine->num_fields--;
memmove (invtelecine->fifo, invtelecine->fifo + 1,
invtelecine->num_fields * sizeof (Field));
num_fields--;
invtelecine->field++;
}
invtelecine->phase++;
if (invtelecine->phase == 2) {
invtelecine->phase = 0;
}
}
}
static void
copy_field (GstInvtelecine * invtelecine, GstBuffer * d, GstBuffer * s,
int field_index)
{
int j;
guint8 *dest;
guint8 *src;
int width = invtelecine->width;
int height = invtelecine->height;
if (invtelecine->format == GST_VIDEO_FORMAT_I420 ||
invtelecine->format == GST_VIDEO_FORMAT_YV12) {
/* planar 4:2:0 */
for (j = field_index; j < height; j += 2) {
dest = GST_BUFFER_DATA (d) + j * width;
src = GST_BUFFER_DATA (s) + j * width;
memcpy (dest, src, width);
}
for (j = field_index; j < height / 2; j += 2) {
dest = GST_BUFFER_DATA (d) + width * height + j * width / 2;
src = GST_BUFFER_DATA (s) + width * height + j * width / 2;
memcpy (dest, src, width / 2);
}
for (j = field_index; j < height / 2; j += 2) {
dest =
GST_BUFFER_DATA (d) + width * height + width / 2 * height / 2 +
j * width / 2;
src =
GST_BUFFER_DATA (s) + width * height + width / 2 * height / 2 +
j * width / 2;
memcpy (dest, src, width / 2);
}
} else {
/* packed 4:2:2 */
for (j = field_index; j < height; j += 2) {
dest = GST_BUFFER_DATA (d) + j * width * 2;
src = GST_BUFFER_DATA (s) + j * width * 2;
memcpy (dest, src, width * 2);
}
}
}
static GstFlowReturn
gst_invtelecine_output_fields (GstInvtelecine * invtelecine, int num_fields)
{
GstBuffer *buffer;
int field_index;
field_index = invtelecine->fifo[0].field_index;
if (invtelecine->format == GST_VIDEO_FORMAT_I420 ||
invtelecine->format == GST_VIDEO_FORMAT_YV12) {
buffer =
gst_buffer_new_and_alloc (invtelecine->width * invtelecine->height * 3 /
2);
} else {
buffer =
gst_buffer_new_and_alloc (invtelecine->width * invtelecine->height * 2);
}
copy_field (invtelecine, buffer, invtelecine->fifo[0].buffer, field_index);
copy_field (invtelecine, buffer, invtelecine->fifo[1].buffer,
field_index ^ 1);
gst_buffer_set_caps (buffer, GST_BUFFER_CAPS (invtelecine->fifo[0].buffer));
GST_BUFFER_TIMESTAMP (buffer) =
GST_BUFFER_TIMESTAMP (invtelecine->fifo[0].buffer);
GST_BUFFER_DURATION (buffer) =
gst_util_uint64_scale (GST_SECOND, num_fields * 1001, 60000);
if (num_fields == 3) {
GST_BUFFER_FLAG_SET (buffer, GST_VIDEO_BUFFER_RFF);
}
if (num_fields == 1) {
GST_BUFFER_FLAG_SET (buffer, GST_VIDEO_BUFFER_ONEFIELD);
}
if (field_index == 0) {
GST_BUFFER_FLAG_SET (buffer, GST_VIDEO_BUFFER_TFF);
}
return gst_pad_push (invtelecine->srcpad, buffer);
}
static GstFlowReturn
gst_invtelecine_chain (GstPad * pad, GstBuffer * buffer)
{
GstInvtelecine *invtelecine = GST_INVTELECINE (gst_pad_get_parent (pad));
int field_index;
GST_DEBUG ("Received buffer at %u:%02u:%02u:%09u",
(guint) (GST_BUFFER_TIMESTAMP (buffer) / (GST_SECOND * 60 * 60)),
(guint) ((GST_BUFFER_TIMESTAMP (buffer) / (GST_SECOND * 60)) % 60),
(guint) ((GST_BUFFER_TIMESTAMP (buffer) / GST_SECOND) % 60),
(guint) (GST_BUFFER_TIMESTAMP (buffer) % GST_SECOND));
field_index = (GST_BUFFER_FLAGS (buffer) & GST_VIDEO_BUFFER_TFF) ? 0 : 1;
//#define BAD
#ifdef BAD
field_index ^= 1;
#endif
GST_DEBUG ("duration %" GST_TIME_FORMAT " flags %04x %s %s %s",
GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)),
GST_BUFFER_FLAGS (buffer),
(GST_BUFFER_FLAGS (buffer) & GST_VIDEO_BUFFER_TFF) ? "tff" : "",
(GST_BUFFER_FLAGS (buffer) & GST_VIDEO_BUFFER_RFF) ? "rff" : "",
(GST_BUFFER_FLAGS (buffer) & GST_VIDEO_BUFFER_ONEFIELD) ? "onefield" :
"");
if (GST_BUFFER_FLAGS (buffer) & GST_BUFFER_FLAG_DISCONT) {
GST_ERROR ("discont");
invtelecine->next_field = field_index;
invtelecine->bad_flag_metric = 1.0;
}
if (invtelecine->next_field != field_index) {
GST_WARNING ("wrong field first, expecting %d got %d",
invtelecine->next_field, field_index);
invtelecine->next_field = field_index;
}
gst_invtelecine_push_field (invtelecine, buffer, invtelecine->next_field);
invtelecine->next_field ^= 1;
if (!(GST_BUFFER_FLAGS (buffer) & GST_VIDEO_BUFFER_ONEFIELD)) {
gst_invtelecine_push_field (invtelecine, buffer, invtelecine->next_field);
invtelecine->next_field ^= 1;
if ((GST_BUFFER_FLAGS (buffer) & GST_VIDEO_BUFFER_RFF)) {
gst_invtelecine_push_field (invtelecine, buffer, invtelecine->next_field);
invtelecine->next_field ^= 1;
}
}
gst_invtelecine_process (invtelecine, FALSE);
gst_buffer_unref (buffer);
gst_object_unref (invtelecine);
return GST_FLOW_OK;
}
static void
gst_invtelecine_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec)
{
GstInvtelecine *invtelecine = GST_INVTELECINE (object);
switch (prop_id) {
case PROP_VERIFY_FIELD_FLAGS:
invtelecine->verify_field_flags = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_invtelecine_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec)
{
GstInvtelecine *invtelecine = GST_INVTELECINE (object);
switch (prop_id) {
case PROP_VERIFY_FIELD_FLAGS:
g_value_set_boolean (value, invtelecine->verify_field_flags);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstStateChangeReturn
gst_invtelecine_change_state (GstElement * element, GstStateChange transition)
{
//GstInvtelecine *invtelecine = GST_INVTELECINE (element);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
//gst_invtelecine_reset (invtelecine);
break;
default:
break;
}
if (parent_class->change_state)
return parent_class->change_state (element, transition);
return GST_STATE_CHANGE_SUCCESS;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (gst_invtelecine_debug, "invtelecine", 0,
"Inverse telecine element");
return gst_element_register (plugin, "invtelecine", GST_RANK_NONE,
GST_TYPE_INVTELECINE);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"invtelecine",
"Inverse Telecine",
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)