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gstreamer/subprojects/gst-plugins-bad/gst/y4m/gsty4mdec.c

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/* GStreamer
* Copyright (C) 2010 David 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:element-y4mdec
* @title: gsty4mdec
*
* The gsty4mdec element decodes uncompressed video in YUV4MPEG format.
*
* ## Example launch line
* |[
* gst-launch-1.0 -v filesrc location=file.y4m ! y4mdec ! xvimagesink
* ]|
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gst/video/video.h>
#include "gsty4mdec.h"
#include <stdlib.h>
#include <string.h>
#define MAX_SIZE 32768
GST_DEBUG_CATEGORY (y4mdec_debug);
#define GST_CAT_DEFAULT y4mdec_debug
/* prototypes */
static void gst_y4m_dec_set_property (GObject * object,
guint property_id, const GValue * value, GParamSpec * pspec);
static void gst_y4m_dec_get_property (GObject * object,
guint property_id, GValue * value, GParamSpec * pspec);
static void gst_y4m_dec_dispose (GObject * object);
static void gst_y4m_dec_finalize (GObject * object);
static GstFlowReturn gst_y4m_dec_chain (GstPad * pad, GstObject * parent,
GstBuffer * buffer);
static gboolean gst_y4m_dec_sink_event (GstPad * pad, GstObject * parent,
GstEvent * event);
static gboolean gst_y4m_dec_src_event (GstPad * pad, GstObject * parent,
GstEvent * event);
static gboolean gst_y4m_dec_src_query (GstPad * pad, GstObject * parent,
GstQuery * query);
static GstStateChangeReturn
gst_y4m_dec_change_state (GstElement * element, GstStateChange transition);
enum
{
PROP_0
};
/* pad templates */
static GstStaticPadTemplate gst_y4m_dec_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/x-yuv4mpeg, y4mversion=2")
);
static GstStaticPadTemplate gst_y4m_dec_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("{I420,Y42B,Y444}"))
);
/* class initialization */
#define gst_y4m_dec_parent_class parent_class
G_DEFINE_TYPE (GstY4mDec, gst_y4m_dec, GST_TYPE_ELEMENT);
GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (y4mdec, "y4mdec", GST_RANK_SECONDARY,
gst_y4m_dec_get_type (), GST_DEBUG_CATEGORY_INIT (y4mdec_debug, "y4mdec", 0,
"y4mdec element"));
static void
gst_y4m_dec_class_init (GstY4mDecClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gobject_class->set_property = gst_y4m_dec_set_property;
gobject_class->get_property = gst_y4m_dec_get_property;
gobject_class->dispose = gst_y4m_dec_dispose;
gobject_class->finalize = gst_y4m_dec_finalize;
element_class->change_state = GST_DEBUG_FUNCPTR (gst_y4m_dec_change_state);
gst_element_class_add_static_pad_template (element_class,
&gst_y4m_dec_src_template);
gst_element_class_add_static_pad_template (element_class,
&gst_y4m_dec_sink_template);
gst_element_class_set_static_metadata (element_class,
"YUV4MPEG demuxer/decoder", "Codec/Demuxer",
"Demuxes/decodes YUV4MPEG streams", "David Schleef <ds@schleef.org>");
}
static void
gst_y4m_dec_init (GstY4mDec * y4mdec)
{
y4mdec->adapter = gst_adapter_new ();
y4mdec->sinkpad =
gst_pad_new_from_static_template (&gst_y4m_dec_sink_template, "sink");
gst_pad_set_event_function (y4mdec->sinkpad,
GST_DEBUG_FUNCPTR (gst_y4m_dec_sink_event));
gst_pad_set_chain_function (y4mdec->sinkpad,
GST_DEBUG_FUNCPTR (gst_y4m_dec_chain));
gst_element_add_pad (GST_ELEMENT (y4mdec), y4mdec->sinkpad);
y4mdec->srcpad = gst_pad_new_from_static_template (&gst_y4m_dec_src_template,
"src");
gst_pad_set_event_function (y4mdec->srcpad,
GST_DEBUG_FUNCPTR (gst_y4m_dec_src_event));
gst_pad_set_query_function (y4mdec->srcpad,
GST_DEBUG_FUNCPTR (gst_y4m_dec_src_query));
gst_pad_use_fixed_caps (y4mdec->srcpad);
gst_element_add_pad (GST_ELEMENT (y4mdec), y4mdec->srcpad);
}
void
gst_y4m_dec_set_property (GObject * object, guint property_id,
const GValue * value, GParamSpec * pspec)
{
g_return_if_fail (GST_IS_Y4M_DEC (object));
switch (property_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
void
gst_y4m_dec_get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec)
{
g_return_if_fail (GST_IS_Y4M_DEC (object));
switch (property_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
void
gst_y4m_dec_dispose (GObject * object)
{
GstY4mDec *y4mdec;
g_return_if_fail (GST_IS_Y4M_DEC (object));
y4mdec = GST_Y4M_DEC (object);
/* clean up as possible. may be called multiple times */
if (y4mdec->adapter) {
g_object_unref (y4mdec->adapter);
y4mdec->adapter = NULL;
}
G_OBJECT_CLASS (parent_class)->dispose (object);
}
void
gst_y4m_dec_finalize (GObject * object)
{
g_return_if_fail (GST_IS_Y4M_DEC (object));
/* clean up object here */
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static GstStateChangeReturn
gst_y4m_dec_change_state (GstElement * element, GstStateChange transition)
{
GstY4mDec *y4mdec;
GstStateChangeReturn ret;
g_return_val_if_fail (GST_IS_Y4M_DEC (element), GST_STATE_CHANGE_FAILURE);
y4mdec = GST_Y4M_DEC (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
if (y4mdec->pool) {
gst_buffer_pool_set_active (y4mdec->pool, FALSE);
gst_object_unref (y4mdec->pool);
}
y4mdec->pool = NULL;
break;
case GST_STATE_CHANGE_READY_TO_NULL:
break;
default:
break;
}
return ret;
}
static GstClockTime
gst_y4m_dec_frames_to_timestamp (GstY4mDec * y4mdec, gint64 frame_index)
{
if (frame_index == -1)
return -1;
return gst_util_uint64_scale (frame_index, GST_SECOND * y4mdec->info.fps_d,
y4mdec->info.fps_n);
}
static gint64
gst_y4m_dec_timestamp_to_frames (GstY4mDec * y4mdec, GstClockTime timestamp)
{
if (timestamp == -1)
return -1;
return gst_util_uint64_scale (timestamp, y4mdec->info.fps_n,
GST_SECOND * y4mdec->info.fps_d);
}
static gint64
gst_y4m_dec_bytes_to_frames (GstY4mDec * y4mdec, gint64 bytes)
{
if (bytes == -1)
return -1;
if (bytes < y4mdec->header_size)
return 0;
return (bytes - y4mdec->header_size) / (y4mdec->info.size + 6);
}
static guint64
gst_y4m_dec_frames_to_bytes (GstY4mDec * y4mdec, gint64 frame_index)
{
if (frame_index == -1)
return -1;
return y4mdec->header_size + (y4mdec->info.size + 6) * frame_index;
}
static GstClockTime
gst_y4m_dec_bytes_to_timestamp (GstY4mDec * y4mdec, gint64 bytes)
{
if (bytes == -1)
return -1;
return gst_y4m_dec_frames_to_timestamp (y4mdec,
gst_y4m_dec_bytes_to_frames (y4mdec, bytes));
}
static gboolean
gst_y4m_dec_parse_header (GstY4mDec * y4mdec, char *header)
{
char *end;
int iformat = 420;
int interlaced_char = 0;
gint fps_n = 0, fps_d = 0;
gint par_n = 0, par_d = 0;
gint width = 0, height = 0;
GstVideoFormat format;
if (memcmp (header, "YUV4MPEG2 ", 10) != 0) {
return FALSE;
}
header += 10;
while (*header) {
GST_DEBUG_OBJECT (y4mdec, "parsing at '%s'", header);
switch (*header) {
case ' ':
header++;
break;
case 'C':
header++;
iformat = strtoul (header, &end, 10);
if (end == header)
goto error;
header = end;
break;
case 'W':
header++;
width = strtoul (header, &end, 10);
if (end == header)
goto error;
header = end;
break;
case 'H':
header++;
height = strtoul (header, &end, 10);
if (end == header)
goto error;
header = end;
break;
case 'I':
header++;
if (header[0] == 0) {
GST_WARNING_OBJECT (y4mdec, "Expecting interlaced flag");
return FALSE;
}
interlaced_char = header[0];
header++;
break;
case 'F':
header++;
fps_n = strtoul (header, &end, 10);
if (end == header)
goto error;
header = end;
if (header[0] != ':') {
GST_WARNING_OBJECT (y4mdec, "Expecting :");
return FALSE;
}
header++;
fps_d = strtoul (header, &end, 10);
if (end == header)
goto error;
header = end;
break;
case 'A':
header++;
par_n = strtoul (header, &end, 10);
if (end == header)
goto error;
header = end;
if (header[0] != ':') {
GST_WARNING_OBJECT (y4mdec, "Expecting :");
return FALSE;
}
header++;
par_d = strtoul (header, &end, 10);
if (end == header)
goto error;
header = end;
break;
default:
GST_WARNING_OBJECT (y4mdec, "Unknown y4m header field '%c', ignoring",
*header);
while (*header && *header != ' ')
header++;
break;
}
}
switch (iformat) {
case 420:
format = GST_VIDEO_FORMAT_I420;
break;
case 422:
format = GST_VIDEO_FORMAT_Y42B;
break;
case 444:
format = GST_VIDEO_FORMAT_Y444;
break;
default:
GST_WARNING_OBJECT (y4mdec, "unknown y4m format %d", iformat);
return FALSE;
}
if (width <= 0 || width > MAX_SIZE || height <= 0 || height > MAX_SIZE) {
GST_WARNING_OBJECT (y4mdec, "Dimensions %dx%d out of range", width, height);
return FALSE;
}
gst_video_info_init (&y4mdec->info);
gst_video_info_set_format (&y4mdec->out_info, format, width, height);
y4mdec->info = y4mdec->out_info;
switch (y4mdec->info.finfo->format) {
case GST_VIDEO_FORMAT_I420:
y4mdec->info.offset[0] = 0;
y4mdec->info.stride[0] = width;
y4mdec->info.offset[1] = y4mdec->info.stride[0] * height;
y4mdec->info.stride[1] = GST_ROUND_UP_2 (width) / 2;
y4mdec->info.offset[2] =
y4mdec->info.offset[1] +
y4mdec->info.stride[1] * (GST_ROUND_UP_2 (height) / 2);
y4mdec->info.stride[2] = GST_ROUND_UP_2 (width) / 2;
y4mdec->info.size =
y4mdec->info.offset[2] +
y4mdec->info.stride[2] * (GST_ROUND_UP_2 (height) / 2);
break;
case GST_VIDEO_FORMAT_Y42B:
y4mdec->info.offset[0] = 0;
y4mdec->info.stride[0] = width;
y4mdec->info.offset[1] = y4mdec->info.stride[0] * height;
y4mdec->info.stride[1] = GST_ROUND_UP_2 (width) / 2;
y4mdec->info.offset[2] =
y4mdec->info.offset[1] + y4mdec->info.stride[1] * height;
y4mdec->info.stride[2] = GST_ROUND_UP_2 (width) / 2;
y4mdec->info.size =
y4mdec->info.offset[2] + y4mdec->info.stride[2] * height;
break;
case GST_VIDEO_FORMAT_Y444:
y4mdec->info.offset[0] = 0;
y4mdec->info.stride[0] = width;
y4mdec->info.offset[1] = y4mdec->info.stride[0] * height;
y4mdec->info.stride[1] = width;
y4mdec->info.offset[2] =
y4mdec->info.offset[1] + y4mdec->info.stride[1] * height;
y4mdec->info.stride[2] = width;
y4mdec->info.size =
y4mdec->info.offset[2] + y4mdec->info.stride[2] * height;
break;
default:
g_assert_not_reached ();
break;
}
switch (interlaced_char) {
case 0:
case '?':
case 'p':
y4mdec->info.interlace_mode = GST_VIDEO_INTERLACE_MODE_PROGRESSIVE;
break;
case 't':
case 'b':
y4mdec->info.interlace_mode = GST_VIDEO_INTERLACE_MODE_INTERLEAVED;
break;
default:
GST_WARNING_OBJECT (y4mdec, "Unknown interlaced char '%c'",
interlaced_char);
return FALSE;
break;
}
if (fps_n == 0)
fps_n = 1;
if (fps_d == 0)
fps_d = 1;
if (par_n == 0)
par_n = 1;
if (par_d == 0)
par_d = 1;
y4mdec->info.fps_n = fps_n;
y4mdec->info.fps_d = fps_d;
y4mdec->info.par_n = par_n;
y4mdec->info.par_d = par_d;
return TRUE;
error:
GST_WARNING_OBJECT (y4mdec, "Expecting number y4m header at '%s'", header);
return FALSE;
}
static GstFlowReturn
gst_y4m_dec_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
{
GstY4mDec *y4mdec;
int n_avail;
GstFlowReturn flow_ret = GST_FLOW_OK;
#define MAX_HEADER_LENGTH 80
char header[MAX_HEADER_LENGTH];
int i;
int len;
y4mdec = GST_Y4M_DEC (parent);
GST_DEBUG_OBJECT (y4mdec, "chain");
if (GST_BUFFER_IS_DISCONT (buffer)) {
GST_DEBUG ("got discont");
gst_adapter_clear (y4mdec->adapter);
}
gst_adapter_push (y4mdec->adapter, buffer);
n_avail = gst_adapter_available (y4mdec->adapter);
if (!y4mdec->have_header) {
gboolean ret;
GstCaps *caps;
GstQuery *query;
if (n_avail < MAX_HEADER_LENGTH)
return GST_FLOW_OK;
gst_adapter_copy (y4mdec->adapter, (guint8 *) header, 0, MAX_HEADER_LENGTH);
header[MAX_HEADER_LENGTH - 1] = 0;
for (i = 0; i < MAX_HEADER_LENGTH; i++) {
if (header[i] == 0x0a)
header[i] = 0;
}
ret = gst_y4m_dec_parse_header (y4mdec, header);
if (!ret) {
GST_ELEMENT_ERROR (y4mdec, STREAM, DECODE,
("Failed to parse YUV4MPEG header"), (NULL));
return GST_FLOW_ERROR;
}
y4mdec->header_size = strlen (header) + 1;
gst_adapter_flush (y4mdec->adapter, y4mdec->header_size);
caps = gst_video_info_to_caps (&y4mdec->info);
ret = gst_pad_set_caps (y4mdec->srcpad, caps);
query = gst_query_new_allocation (caps, FALSE);
y4mdec->video_meta = FALSE;
if (y4mdec->pool) {
gst_buffer_pool_set_active (y4mdec->pool, FALSE);
gst_object_unref (y4mdec->pool);
}
y4mdec->pool = NULL;
if (gst_pad_peer_query (y4mdec->srcpad, query)) {
y4mdec->video_meta =
gst_query_find_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL);
/* We only need a pool if we need to do stride conversion for downstream */
if (!y4mdec->video_meta && memcmp (&y4mdec->info, &y4mdec->out_info,
sizeof (y4mdec->info)) != 0) {
GstBufferPool *pool = NULL;
GstAllocator *allocator = NULL;
GstAllocationParams params;
GstStructure *config;
guint size, min, max;
if (gst_query_get_n_allocation_params (query) > 0) {
gst_query_parse_nth_allocation_param (query, 0, &allocator, &params);
} else {
allocator = NULL;
gst_allocation_params_init (&params);
}
if (gst_query_get_n_allocation_pools (query) > 0) {
gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min,
&max);
size = MAX (size, y4mdec->out_info.size);
} else {
pool = NULL;
size = y4mdec->out_info.size;
min = max = 0;
}
if (pool == NULL) {
pool = gst_video_buffer_pool_new ();
}
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_set_params (config, caps, size, min, max);
gst_buffer_pool_config_set_allocator (config, allocator, &params);
gst_buffer_pool_set_config (pool, config);
if (allocator)
gst_object_unref (allocator);
y4mdec->pool = pool;
}
} else if (memcmp (&y4mdec->info, &y4mdec->out_info,
sizeof (y4mdec->info)) != 0) {
GstBufferPool *pool;
GstStructure *config;
/* No pool, create our own if we need to do stride conversion */
pool = gst_video_buffer_pool_new ();
config = gst_buffer_pool_get_config (pool);
gst_buffer_pool_config_set_params (config, caps, y4mdec->out_info.size, 0,
0);
gst_buffer_pool_set_config (pool, config);
y4mdec->pool = pool;
}
if (y4mdec->pool) {
gst_buffer_pool_set_active (y4mdec->pool, TRUE);
}
gst_query_unref (query);
gst_caps_unref (caps);
if (!ret) {
GST_DEBUG_OBJECT (y4mdec, "Couldn't set caps on src pad");
return GST_FLOW_ERROR;
}
y4mdec->have_header = TRUE;
}
if (y4mdec->have_new_segment) {
GstEvent *event;
GstClockTime start = gst_y4m_dec_bytes_to_timestamp (y4mdec,
y4mdec->segment.start);
GstClockTime stop = gst_y4m_dec_bytes_to_timestamp (y4mdec,
y4mdec->segment.stop);
GstClockTime time = gst_y4m_dec_bytes_to_timestamp (y4mdec,
y4mdec->segment.time);
GstSegment seg;
gst_segment_init (&seg, GST_FORMAT_TIME);
seg.start = start;
seg.stop = stop;
seg.time = time;
event = gst_event_new_segment (&seg);
gst_pad_push_event (y4mdec->srcpad, event);
//gst_event_unref (event);
y4mdec->have_new_segment = FALSE;
y4mdec->frame_index = gst_y4m_dec_bytes_to_frames (y4mdec,
y4mdec->segment.time);
GST_DEBUG ("new frame_index %d", y4mdec->frame_index);
}
while (1) {
n_avail = gst_adapter_available (y4mdec->adapter);
if (n_avail < MAX_HEADER_LENGTH)
break;
gst_adapter_copy (y4mdec->adapter, (guint8 *) header, 0, MAX_HEADER_LENGTH);
header[MAX_HEADER_LENGTH - 1] = 0;
for (i = 0; i < MAX_HEADER_LENGTH; i++) {
if (header[i] == 0x0a)
header[i] = 0;
}
if (memcmp (header, "FRAME", 5) != 0) {
GST_ELEMENT_ERROR (y4mdec, STREAM, DECODE,
("Failed to parse YUV4MPEG frame"), (NULL));
flow_ret = GST_FLOW_ERROR;
break;
}
len = strlen (header);
if (n_avail < y4mdec->info.size + len + 1) {
/* not enough data */
GST_DEBUG ("not enough data for frame %d < %" G_GSIZE_FORMAT,
n_avail, y4mdec->info.size + len + 1);
break;
}
gst_adapter_flush (y4mdec->adapter, len + 1);
buffer = gst_adapter_take_buffer (y4mdec->adapter, y4mdec->info.size);
GST_BUFFER_TIMESTAMP (buffer) =
gst_y4m_dec_frames_to_timestamp (y4mdec, y4mdec->frame_index);
GST_BUFFER_DURATION (buffer) =
gst_y4m_dec_frames_to_timestamp (y4mdec, y4mdec->frame_index + 1) -
GST_BUFFER_TIMESTAMP (buffer);
y4mdec->frame_index++;
if (y4mdec->video_meta) {
gst_buffer_add_video_meta_full (buffer, 0, y4mdec->info.finfo->format,
y4mdec->info.width, y4mdec->info.height, y4mdec->info.finfo->n_planes,
y4mdec->info.offset, y4mdec->info.stride);
} else if (memcmp (&y4mdec->info, &y4mdec->out_info,
sizeof (y4mdec->info)) != 0) {
GstBuffer *outbuf;
GstVideoFrame iframe, oframe;
gint i, j;
gint w, h, istride, ostride;
guint8 *src, *dest;
/* Allocate a new buffer and do stride conversion */
g_assert (y4mdec->pool != NULL);
flow_ret = gst_buffer_pool_acquire_buffer (y4mdec->pool, &outbuf, NULL);
if (flow_ret != GST_FLOW_OK) {
gst_buffer_unref (buffer);
break;
}
gst_video_frame_map (&iframe, &y4mdec->info, buffer, GST_MAP_READ);
gst_video_frame_map (&oframe, &y4mdec->out_info, outbuf, GST_MAP_WRITE);
for (i = 0; i < 3; i++) {
w = GST_VIDEO_FRAME_COMP_WIDTH (&iframe, i);
h = GST_VIDEO_FRAME_COMP_HEIGHT (&iframe, i);
istride = GST_VIDEO_FRAME_COMP_STRIDE (&iframe, i);
ostride = GST_VIDEO_FRAME_COMP_STRIDE (&oframe, i);
src = GST_VIDEO_FRAME_COMP_DATA (&iframe, i);
dest = GST_VIDEO_FRAME_COMP_DATA (&oframe, i);
for (j = 0; j < h; j++) {
memcpy (dest, src, w);
dest += ostride;
src += istride;
}
}
gst_video_frame_unmap (&iframe);
gst_video_frame_unmap (&oframe);
gst_buffer_copy_into (outbuf, buffer, GST_BUFFER_COPY_TIMESTAMPS, 0, -1);
gst_buffer_unref (buffer);
buffer = outbuf;
}
flow_ret = gst_pad_push (y4mdec->srcpad, buffer);
if (flow_ret != GST_FLOW_OK)
break;
}
GST_DEBUG ("returning %d", flow_ret);
return flow_ret;
}
static gboolean
gst_y4m_dec_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
gboolean res;
GstY4mDec *y4mdec;
y4mdec = GST_Y4M_DEC (parent);
GST_DEBUG_OBJECT (y4mdec, "event");
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_START:
res = gst_pad_push_event (y4mdec->srcpad, event);
break;
case GST_EVENT_FLUSH_STOP:
res = gst_pad_push_event (y4mdec->srcpad, event);
break;
case GST_EVENT_SEGMENT:
{
GstSegment seg;
gst_event_copy_segment (event, &seg);
GST_DEBUG ("segment: %" GST_SEGMENT_FORMAT, &seg);
if (seg.format == GST_FORMAT_BYTES) {
y4mdec->segment = seg;
y4mdec->have_new_segment = TRUE;
}
res = TRUE;
/* not sure why it's not forwarded, but let's unref it so it
doesn't leak, remove the unref if it gets forwarded again */
gst_event_unref (event);
//res = gst_pad_push_event (y4mdec->srcpad, event);
}
break;
case GST_EVENT_EOS:
default:
res = gst_pad_event_default (pad, parent, event);
break;
}
return res;
}
static gboolean
gst_y4m_dec_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
gboolean res;
GstY4mDec *y4mdec;
y4mdec = GST_Y4M_DEC (parent);
GST_DEBUG_OBJECT (y4mdec, "event");
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
{
gdouble rate;
GstFormat format;
GstSeekFlags flags;
GstSeekType start_type, stop_type;
gint64 start, stop;
gint64 framenum;
guint64 byte;
gst_event_parse_seek (event, &rate, &format, &flags, &start_type,
&start, &stop_type, &stop);
if (format != GST_FORMAT_TIME) {
res = FALSE;
break;
}
framenum = gst_y4m_dec_timestamp_to_frames (y4mdec, start);
GST_DEBUG ("seeking to frame %" G_GINT64_FORMAT, framenum);
if (framenum == -1) {
res = FALSE;
break;
}
byte = gst_y4m_dec_frames_to_bytes (y4mdec, framenum);
GST_DEBUG ("offset %" G_GUINT64_FORMAT, (guint64) byte);
if (byte == -1) {
res = FALSE;
break;
}
gst_event_unref (event);
event = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
start_type, byte, stop_type, -1);
res = gst_pad_push_event (y4mdec->sinkpad, event);
}
break;
default:
res = gst_pad_event_default (pad, parent, event);
break;
}
return res;
}
static gboolean
gst_y4m_dec_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
{
GstY4mDec *y4mdec = GST_Y4M_DEC (parent);
gboolean res = FALSE;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_DURATION:
{
GstFormat format;
GstQuery *peer_query;
GST_DEBUG ("duration query");
gst_query_parse_duration (query, &format, NULL);
if (format != GST_FORMAT_TIME) {
res = FALSE;
GST_DEBUG_OBJECT (y4mdec, "not handling duration query in format %d",
format);
break;
}
peer_query = gst_query_new_duration (GST_FORMAT_BYTES);
res = gst_pad_peer_query (y4mdec->sinkpad, peer_query);
if (res) {
gint64 duration;
int n_frames;
gst_query_parse_duration (peer_query, &format, &duration);
n_frames = gst_y4m_dec_bytes_to_frames (y4mdec, duration);
GST_DEBUG ("duration in frames %d", n_frames);
duration = gst_y4m_dec_frames_to_timestamp (y4mdec, n_frames);
GST_DEBUG ("duration in time %" GST_TIME_FORMAT,
GST_TIME_ARGS (duration));
gst_query_set_duration (query, GST_FORMAT_TIME, duration);
res = TRUE;
}
gst_query_unref (peer_query);
break;
}
default:
res = gst_pad_query_default (pad, parent, query);
break;
}
return res;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
return GST_ELEMENT_REGISTER (y4mdec, plugin);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
y4mdec,
"Demuxes/decodes YUV4MPEG streams",
plugin_init, VERSION, "LGPL", PACKAGE_NAME, GST_PACKAGE_ORIGIN)
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