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gstreamer/gst/rawparse/gstrawvideoparse.c
Luis de Bethencourt 9514d06ab6 rawvideoparse: fix typo in comment 
Small typo in the comment explaining the code fixed by the previous commit.
Fixing it.
2016-08-19 12:25:48 +01:00

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/* GStreamer
* Copyright (C) <2016> Carlos Rafael Giani <dv at pseudoterminal dot 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-rawvideoparse
*
* This element parses incoming data as raw video frames and timestamps these.
* It also handles seek queries in said raw video data, and ensures that output
* buffers contain exactly one frame, even if the input buffers contain only
* partial frames or multiple frames. In the former case, it will continue to
* receive buffers until there is enough input data to output one frame. In the
* latter case, it will extract the first frame in the buffer and output it, then
* the second one etc. until the remaining unparsed bytes aren't enough to form
* a complete frame, and it will then continue as described in the earlier case.
*
* The element implements the properties and sink caps configuration as specified
* in the #GstRawBaseParse documentation. The properties configuration can be
* modified by using the width, height, pixel-aspect-ratio, framerate, interlaced,
* top-field-first, plane-strides, plane-offsets, and frame-stride properties.
*
* If the properties configuration is used, plane strides and offsets will be
* computed by using gst_video_info_set_format(). This can be overridden by passing
* GValueArrays to the plane-offsets and plane-strides properties. When this is
* done, these custom offsets and strides are used later even if new width,
* height, format etc. property values might be set. To switch back to computed
* plane strides & offsets, pass NULL to one or both of the plane-offset and
* plane-array properties.
*
* The frame stride property is useful in cases where there is extra data between
* the frames (for example, trailing metadata, or headers). The parser calculates
* the actual frame size out of the other properties and compares it with this
* frame-stride value. If the frame stride is larger than the calculated size,
* then the extra bytes after the end of the frame are skipped. For example, with
* 8-bit grayscale frames and a frame size of 100x10 pixels and a frame stride of
* 1500 bytes, there are 500 excess bytes at the end of the actual frame which
* are then skipped. It is safe to set the frame stride to a value that is smaller
* than the actual frame size (in fact, its default value is 0); if it is smaller,
* then no trailing data will be skipped.
*
* If a framerate of 0 Hz is set (for example, 0/1), then output buffers will have
* no duration set. The first output buffer will have a PTS 0, all subsequent ones
* an unset PTS.
*
* <refsect2>
* <title>Example pipelines</title>
* |[
* gst-launch-1.0 filesrc location=video.raw ! rawvideoparse use-sink-caps=false \
* width=500 height=400 format=y444 ! autovideosink
* ]| Read raw data from a local file and parse it as video data with 500x400 pixels
* and Y444 video format.
* |[
* gst-launch-1.0 filesrc location=video.raw ! queue ! "video/x-raw, width=320, \
* height=240, format=I420, framerate=1/1" ! rawvideoparse \
* use-sink-caps=true ! autovideosink
* ]| Read raw data from a local file and parse it as video data with 320x240 pixels
* and I420 video format. The queue element here is to force push based scheduling.
* See the documentation in #GstRawBaseParse for the reason why.
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
/* FIXME: GValueArray is deprecated, but there is currently no viabla alternative
* See https://bugzilla.gnome.org/show_bug.cgi?id=667228 */
#define GLIB_DISABLE_DEPRECATION_WARNINGS
#include <string.h>
#include "gstrawvideoparse.h"
#include "unalignedvideo.h"
GST_DEBUG_CATEGORY_STATIC (raw_video_parse_debug);
#define GST_CAT_DEFAULT raw_video_parse_debug
enum
{
PROP_0,
PROP_WIDTH,
PROP_HEIGHT,
PROP_FORMAT,
PROP_PIXEL_ASPECT_RATIO,
PROP_FRAMERATE,
PROP_INTERLACED,
PROP_TOP_FIELD_FIRST,
PROP_PLANE_STRIDES,
PROP_PLANE_OFFSETS,
PROP_FRAME_STRIDE
};
#define DEFAULT_WIDTH 320
#define DEFAULT_HEIGHT 240
#define DEFAULT_FORMAT GST_VIDEO_FORMAT_I420
#define DEFAULT_PIXEL_ASPECT_RATIO_N 1
#define DEFAULT_PIXEL_ASPECT_RATIO_D 1
#define DEFAULT_FRAMERATE_N 25
#define DEFAULT_FRAMERATE_D 1
#define DEFAULT_INTERLACED FALSE
#define DEFAULT_TOP_FIELD_FIRST FALSE
#define DEFAULT_FRAME_STRIDE 0
#define GST_RAW_VIDEO_PARSE_CAPS \
GST_VIDEO_CAPS_MAKE(GST_VIDEO_FORMATS_ALL) "; "
static GstStaticPadTemplate static_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_UNALIGNED_RAW_VIDEO_CAPS "; " GST_RAW_VIDEO_PARSE_CAPS)
);
static GstStaticPadTemplate static_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_RAW_VIDEO_PARSE_CAPS)
);
#define gst_raw_video_parse_parent_class parent_class
G_DEFINE_TYPE (GstRawVideoParse, gst_raw_video_parse, GST_TYPE_RAW_BASE_PARSE);
static void gst_raw_video_parse_set_property (GObject * object, guint prop_id,
GValue const *value, GParamSpec * pspec);
static void gst_raw_video_parse_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static gboolean gst_raw_video_parse_stop (GstBaseParse * parse);
static gboolean gst_raw_video_parse_set_current_config (GstRawBaseParse *
raw_base_parse, GstRawBaseParseConfig config);
static GstRawBaseParseConfig
gst_raw_video_parse_get_current_config (GstRawBaseParse * raw_base_parse);
static gboolean gst_raw_video_parse_set_config_from_caps (GstRawBaseParse *
raw_base_parse, GstRawBaseParseConfig config, GstCaps * caps);
static gboolean gst_raw_video_parse_get_caps_from_config (GstRawBaseParse *
raw_base_parse, GstRawBaseParseConfig config, GstCaps ** caps);
static gsize gst_raw_video_parse_get_config_frame_size (GstRawBaseParse *
raw_base_parse, GstRawBaseParseConfig config);
static guint gst_raw_video_parse_get_max_frames_per_buffer (GstRawBaseParse *
raw_base_parse, GstRawBaseParseConfig config);
static gboolean gst_raw_video_parse_is_config_ready (GstRawBaseParse *
raw_base_parse, GstRawBaseParseConfig config);
static gboolean gst_raw_video_parse_process (GstRawBaseParse * raw_base_parse,
GstRawBaseParseConfig config, GstBuffer * in_data, gsize total_num_in_bytes,
gsize num_valid_in_bytes, GstBuffer ** processed_data);
static gboolean gst_raw_video_parse_is_unit_format_supported (GstRawBaseParse *
raw_base_parse, GstFormat format);
static void gst_raw_video_parse_get_units_per_second (GstRawBaseParse *
raw_base_parse, GstFormat format, GstRawBaseParseConfig config,
gsize * units_per_sec_n, gsize * units_per_sec_d);
static gint gst_raw_video_parse_get_overhead_size (GstRawBaseParse *
raw_base_parse, GstRawBaseParseConfig config);
static gboolean gst_raw_video_parse_is_using_sink_caps (GstRawVideoParse *
raw_video_parse);
static GstRawVideoParseConfig
* gst_raw_video_parse_get_config_ptr (GstRawVideoParse * raw_video_parse,
GstRawBaseParseConfig config);
static void gst_raw_video_parse_init_config (GstRawVideoParseConfig * config);
static void gst_raw_video_parse_update_info (GstRawVideoParseConfig * config);
static void
gst_raw_video_parse_class_init (GstRawVideoParseClass * klass)
{
GObjectClass *object_class;
GstElementClass *element_class;
GstBaseParseClass *baseparse_class;
GstRawBaseParseClass *rawbaseparse_class;
GST_DEBUG_CATEGORY_INIT (raw_video_parse_debug, "rawvideoparse", 0,
"rawvideoparse element");
object_class = G_OBJECT_CLASS (klass);
element_class = GST_ELEMENT_CLASS (klass);
baseparse_class = GST_BASE_PARSE_CLASS (klass);
rawbaseparse_class = GST_RAW_BASE_PARSE_CLASS (klass);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&static_sink_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&static_src_template));
object_class->set_property =
GST_DEBUG_FUNCPTR (gst_raw_video_parse_set_property);
object_class->get_property =
GST_DEBUG_FUNCPTR (gst_raw_video_parse_get_property);
baseparse_class->stop = GST_DEBUG_FUNCPTR (gst_raw_video_parse_stop);
rawbaseparse_class->set_current_config =
GST_DEBUG_FUNCPTR (gst_raw_video_parse_set_current_config);
rawbaseparse_class->get_current_config =
GST_DEBUG_FUNCPTR (gst_raw_video_parse_get_current_config);
rawbaseparse_class->set_config_from_caps =
GST_DEBUG_FUNCPTR (gst_raw_video_parse_set_config_from_caps);
rawbaseparse_class->get_caps_from_config =
GST_DEBUG_FUNCPTR (gst_raw_video_parse_get_caps_from_config);
rawbaseparse_class->get_config_frame_size =
GST_DEBUG_FUNCPTR (gst_raw_video_parse_get_config_frame_size);
rawbaseparse_class->get_max_frames_per_buffer =
GST_DEBUG_FUNCPTR (gst_raw_video_parse_get_max_frames_per_buffer);
rawbaseparse_class->is_config_ready =
GST_DEBUG_FUNCPTR (gst_raw_video_parse_is_config_ready);
rawbaseparse_class->process = GST_DEBUG_FUNCPTR (gst_raw_video_parse_process);
rawbaseparse_class->is_unit_format_supported =
GST_DEBUG_FUNCPTR (gst_raw_video_parse_is_unit_format_supported);
rawbaseparse_class->get_units_per_second =
GST_DEBUG_FUNCPTR (gst_raw_video_parse_get_units_per_second);
rawbaseparse_class->get_overhead_size =
GST_DEBUG_FUNCPTR (gst_raw_video_parse_get_overhead_size);
g_object_class_install_property (object_class,
PROP_WIDTH,
g_param_spec_int ("width",
"Width",
"Width of frames in raw stream",
0, G_MAXINT, DEFAULT_WIDTH,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)
);
g_object_class_install_property (object_class,
PROP_HEIGHT,
g_param_spec_int ("height",
"Height",
"Height of frames in raw stream",
0, G_MAXINT,
DEFAULT_HEIGHT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)
);
g_object_class_install_property (object_class,
PROP_FORMAT,
g_param_spec_enum ("format",
"Format",
"Format of frames in raw stream",
GST_TYPE_VIDEO_FORMAT,
DEFAULT_FORMAT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)
);
g_object_class_install_property (object_class,
PROP_FRAMERATE,
gst_param_spec_fraction ("framerate",
"Frame rate",
"Rate of frames in raw stream",
0, 1, G_MAXINT, 1,
DEFAULT_FRAMERATE_N, DEFAULT_FRAMERATE_D,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)
);
g_object_class_install_property (object_class,
PROP_PIXEL_ASPECT_RATIO,
gst_param_spec_fraction ("pixel-aspect-ratio",
"Pixel aspect ratio",
"Pixel aspect ratio of frames in raw stream",
1, 100, 100, 1,
DEFAULT_PIXEL_ASPECT_RATIO_N, DEFAULT_PIXEL_ASPECT_RATIO_D,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)
);
g_object_class_install_property (object_class,
PROP_INTERLACED,
g_param_spec_boolean ("interlaced",
"Interlaced flag",
"True if frames in raw stream are interlaced",
DEFAULT_INTERLACED, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)
);
g_object_class_install_property (object_class,
PROP_TOP_FIELD_FIRST,
g_param_spec_boolean ("top-field-first",
"Top field first",
"True if top field in frames in raw stream come first (not used if frames aren't interlaced)",
DEFAULT_INTERLACED, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)
);
g_object_class_install_property (object_class,
PROP_PLANE_STRIDES,
g_param_spec_value_array ("plane-strides",
"Plane strides",
"Strides of the planets in bytes",
g_param_spec_uint ("plane-stride",
"Plane stride",
"Stride of the n-th plane in bytes (0 = stride equals width*bytes-per-pixel)",
0, G_MAXUINT,
0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS),
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)
);
g_object_class_install_property (object_class,
PROP_PLANE_OFFSETS,
g_param_spec_value_array ("plane-offsets",
"Plane offsets",
"Offsets of the planets in bytes",
g_param_spec_uint ("plane-offset",
"Plane offset",
"Offset of the n-th plane in bytes",
0, G_MAXUINT,
0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS),
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)
);
g_object_class_install_property (object_class,
PROP_FRAME_STRIDE,
g_param_spec_uint ("frame-stride",
"Frame stride",
"Stride between whole frames (0 = frames are tightly packed together)",
0, G_MAXUINT,
DEFAULT_FRAME_STRIDE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)
);
gst_element_class_set_static_metadata (element_class,
"rawvideoparse",
"Codec/Parser/Video",
"Converts unformatted data streams into timestamped raw video frames",
"Carlos Rafael Giani <dv@pseudoterminal.org>");
}
static void
gst_raw_video_parse_init (GstRawVideoParse * raw_video_parse)
{
gst_raw_video_parse_init_config (&(raw_video_parse->properties_config));
gst_raw_video_parse_init_config (&(raw_video_parse->sink_caps_config));
/* As required by GstRawBaseParse, ensure that the current configuration
* is initially set to be the properties config */
raw_video_parse->current_config = &(raw_video_parse->properties_config);
/* Properties config must be valid from the start, so set its ready value
* to TRUE, and make sure its bpf value is valid. */
raw_video_parse->properties_config.ready = TRUE;
raw_video_parse->properties_config.top_field_first = DEFAULT_TOP_FIELD_FIRST;
raw_video_parse->properties_config.frame_stride = DEFAULT_FRAME_STRIDE;
}
static void
gst_raw_video_parse_set_property (GObject * object, guint prop_id,
GValue const *value, GParamSpec * pspec)
{
GstBaseParse *base_parse = GST_BASE_PARSE (object);
GstRawBaseParse *raw_base_parse = GST_RAW_BASE_PARSE (object);
GstRawVideoParse *raw_video_parse = GST_RAW_VIDEO_PARSE (object);
GstRawVideoParseConfig *props_cfg = &(raw_video_parse->properties_config);
/* All properties are handled similarly:
* - if the new value is the same as the current value, nothing is done
* - the parser lock is held while the new value is set
* - if the properties config is the current config, the source caps are
* invalidated to ensure that the code in handle_frame pushes a new CAPS
* event out
* - properties that affect the video frame size call the function to update
* the info and also call gst_base_parse_set_min_frame_size() to ensure
* that the minimum frame size can hold 1 frame (= one sample for each
* channel); to ensure that the min frame size includes any extra padding,
* it is set to the result of gst_raw_video_parse_get_config_frame_size()
* - property configuration values that require video info updates aren't
* written directory into the video info structure, but in the extra
* fields instead (gst_raw_video_parse_update_info() then copies the values
* from these fields into the video info); see the documentation inside
* gst_raw_video_parse_update_info() for the reason why
*/
switch (prop_id) {
case PROP_WIDTH:
{
gint new_width = g_value_get_int (value);
GST_RAW_BASE_PARSE_CONFIG_MUTEX_LOCK (object);
if (new_width != props_cfg->width) {
props_cfg->width = new_width;
gst_raw_video_parse_update_info (props_cfg);
if (!gst_raw_video_parse_is_using_sink_caps (raw_video_parse)) {
gst_raw_base_parse_invalidate_src_caps (raw_base_parse);
gst_base_parse_set_min_frame_size (base_parse,
gst_raw_video_parse_get_config_frame_size (raw_base_parse,
GST_RAW_BASE_PARSE_CONFIG_PROPERTIES));
}
}
GST_RAW_BASE_PARSE_CONFIG_MUTEX_UNLOCK (object);
break;
}
case PROP_HEIGHT:
{
gint new_height = g_value_get_int (value);
GST_RAW_BASE_PARSE_CONFIG_MUTEX_LOCK (object);
if (new_height != props_cfg->height) {
props_cfg->height = new_height;
gst_raw_video_parse_update_info (props_cfg);
if (!gst_raw_video_parse_is_using_sink_caps (raw_video_parse)) {
gst_raw_base_parse_invalidate_src_caps (raw_base_parse);
gst_base_parse_set_min_frame_size (base_parse,
gst_raw_video_parse_get_config_frame_size (raw_base_parse,
GST_RAW_BASE_PARSE_CONFIG_PROPERTIES));
}
}
GST_RAW_BASE_PARSE_CONFIG_MUTEX_UNLOCK (object);
break;
}
case PROP_FORMAT:
{
GstVideoFormat new_format = g_value_get_enum (value);
GST_RAW_BASE_PARSE_CONFIG_MUTEX_LOCK (object);
if (new_format != props_cfg->format) {
props_cfg->format = new_format;
gst_raw_video_parse_update_info (props_cfg);
if (!gst_raw_video_parse_is_using_sink_caps (raw_video_parse)) {
gst_raw_base_parse_invalidate_src_caps (raw_base_parse);
gst_base_parse_set_min_frame_size (base_parse,
gst_raw_video_parse_get_config_frame_size (raw_base_parse,
GST_RAW_BASE_PARSE_CONFIG_PROPERTIES));
}
}
GST_RAW_BASE_PARSE_CONFIG_MUTEX_UNLOCK (object);
break;
}
case PROP_PIXEL_ASPECT_RATIO:
{
GST_RAW_BASE_PARSE_CONFIG_MUTEX_LOCK (object);
/* The pixel aspect ratio does not affect the video frame size,
* so it is just set directly without any updates */
props_cfg->pixel_aspect_ratio_n =
GST_VIDEO_INFO_PAR_N (&(props_cfg->info)) =
gst_value_get_fraction_numerator (value);
props_cfg->pixel_aspect_ratio_d =
GST_VIDEO_INFO_PAR_D (&(props_cfg->info)) =
gst_value_get_fraction_denominator (value);
GST_DEBUG_OBJECT (raw_video_parse, "setting pixel aspect ratio to %u/%u",
props_cfg->pixel_aspect_ratio_n, props_cfg->pixel_aspect_ratio_d);
GST_RAW_BASE_PARSE_CONFIG_MUTEX_UNLOCK (object);
break;
}
case PROP_FRAMERATE:
{
GST_RAW_BASE_PARSE_CONFIG_MUTEX_LOCK (object);
/* The framerate does not affect the video frame size,
* so it is just set directly without any updates */
props_cfg->framerate_n = GST_VIDEO_INFO_FPS_N (&(props_cfg->info)) =
gst_value_get_fraction_numerator (value);
props_cfg->framerate_d = GST_VIDEO_INFO_FPS_D (&(props_cfg->info)) =
gst_value_get_fraction_denominator (value);
GST_DEBUG_OBJECT (raw_video_parse, "setting framerate to %u/%u",
props_cfg->framerate_n, props_cfg->framerate_d);
GST_RAW_BASE_PARSE_CONFIG_MUTEX_UNLOCK (object);
break;
}
case PROP_INTERLACED:
{
GST_RAW_BASE_PARSE_CONFIG_MUTEX_LOCK (object);
/* Interlacing does not affect the video frame size,
* so it is just set directly without any updates */
props_cfg->interlaced = g_value_get_boolean (value);
GST_VIDEO_INFO_INTERLACE_MODE (&(props_cfg->info)) =
props_cfg->interlaced ? GST_VIDEO_INTERLACE_MODE_INTERLEAVED :
GST_VIDEO_INTERLACE_MODE_PROGRESSIVE;
GST_RAW_BASE_PARSE_CONFIG_MUTEX_UNLOCK (object);
break;
}
case PROP_TOP_FIELD_FIRST:
{
/* The top-field-first flag is a detail related to
* interlacing, so no video info update is needed */
GST_RAW_BASE_PARSE_CONFIG_MUTEX_LOCK (object);
props_cfg->top_field_first = g_value_get_boolean (value);
GST_RAW_BASE_PARSE_CONFIG_MUTEX_UNLOCK (object);
break;
}
case PROP_PLANE_STRIDES:
{
GValueArray *valarray = g_value_get_boxed (value);
guint n_planes;
guint i;
/* If no valarray is given, then disable custom
* plane strides & offsets and stick to the
* standard computed ones */
if (valarray == NULL) {
GST_DEBUG_OBJECT (raw_video_parse,
"custom plane strides & offsets disabled");
props_cfg->custom_plane_strides = FALSE;
gst_raw_video_parse_update_info (props_cfg);
break;
}
/* Sanity check - reject empty arrays */
if ((valarray != NULL) && (valarray->n_values == 0)) {
GST_ELEMENT_ERROR (raw_video_parse, LIBRARY, SETTINGS,
("plane strides property holds an empty array"), (NULL));
break;
}
GST_RAW_BASE_PARSE_CONFIG_MUTEX_LOCK (object);
n_planes = GST_VIDEO_INFO_N_PLANES (&(props_cfg->info));
/* Check that the valarray holds the right number of values */
if (valarray->n_values != n_planes) {
GST_ELEMENT_ERROR (raw_video_parse, LIBRARY, SETTINGS,
("incorrect number of elements in plane strides property"),
("expected: %u, got: %u", n_planes, valarray->n_values));
GST_RAW_BASE_PARSE_CONFIG_MUTEX_UNLOCK (object);
break;
}
/* Copy the values to the stride array */
for (i = 0; i < n_planes; ++i) {
GValue *val = g_value_array_get_nth (valarray, i);
props_cfg->plane_strides[i] = g_value_get_uint (val);
GST_DEBUG_OBJECT (raw_video_parse, "plane #%u stride: %d", i,
props_cfg->plane_strides[i]);
}
props_cfg->custom_plane_strides = TRUE;
gst_raw_video_parse_update_info (props_cfg);
if (!gst_raw_video_parse_is_using_sink_caps (raw_video_parse))
gst_base_parse_set_min_frame_size (base_parse,
gst_raw_video_parse_get_config_frame_size (raw_base_parse,
GST_RAW_BASE_PARSE_CONFIG_PROPERTIES));
GST_RAW_BASE_PARSE_CONFIG_MUTEX_UNLOCK (object);
break;
}
case PROP_PLANE_OFFSETS:
{
GValueArray *valarray = g_value_get_boxed (value);
guint n_planes;
guint i;
/* If no valarray is given, then disable custom
* plane strides & offsets and stick to the
* standard computed ones */
if (valarray == NULL) {
GST_DEBUG_OBJECT (raw_video_parse,
"custom plane strides & offsets disabled");
props_cfg->custom_plane_strides = FALSE;
gst_raw_video_parse_update_info (props_cfg);
break;
}
/* Sanity check - reject empty arrays */
if ((valarray != NULL) && (valarray->n_values == 0)) {
GST_ELEMENT_ERROR (raw_video_parse, LIBRARY, SETTINGS,
("plane offsets property holds an empty array"), (NULL));
break;
}
GST_RAW_BASE_PARSE_CONFIG_MUTEX_LOCK (object);
n_planes = GST_VIDEO_INFO_N_PLANES (&(props_cfg->info));
/* Check that the valarray holds the right number of values */
if (valarray->n_values != n_planes) {
GST_ELEMENT_ERROR (raw_video_parse, LIBRARY, SETTINGS,
("incorrect number of elements in plane offsets property"),
("expected: %u, got: %u", n_planes, valarray->n_values));
GST_RAW_BASE_PARSE_CONFIG_MUTEX_UNLOCK (object);
break;
}
/* Copy the values to the offset array */
for (i = 0; i < n_planes; ++i) {
GValue *val = g_value_array_get_nth (valarray, i);
props_cfg->plane_offsets[i] = g_value_get_uint (val);
GST_DEBUG_OBJECT (raw_video_parse, "plane #%u offset: %" G_GSIZE_FORMAT,
i, props_cfg->plane_offsets[i]);
}
props_cfg->custom_plane_strides = TRUE;
gst_raw_video_parse_update_info (props_cfg);
if (!gst_raw_video_parse_is_using_sink_caps (raw_video_parse))
gst_base_parse_set_min_frame_size (base_parse,
gst_raw_video_parse_get_config_frame_size (raw_base_parse,
GST_RAW_BASE_PARSE_CONFIG_PROPERTIES));
GST_RAW_BASE_PARSE_CONFIG_MUTEX_UNLOCK (object);
break;
}
case PROP_FRAME_STRIDE:
{
/* The frame stride does not affect the video frame size,
* so it is just set directly without any updates */
GST_RAW_BASE_PARSE_CONFIG_MUTEX_LOCK (object);
props_cfg->frame_stride = g_value_get_uint (value);
gst_raw_video_parse_update_info (props_cfg);
if (!gst_raw_video_parse_is_using_sink_caps (raw_video_parse))
gst_base_parse_set_min_frame_size (base_parse,
gst_raw_video_parse_get_config_frame_size (raw_base_parse,
GST_RAW_BASE_PARSE_CONFIG_PROPERTIES));
GST_RAW_BASE_PARSE_CONFIG_MUTEX_UNLOCK (object);
break;
}
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_raw_video_parse_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstRawVideoParse *raw_video_parse = GST_RAW_VIDEO_PARSE (object);
GstRawVideoParseConfig *props_cfg = &(raw_video_parse->properties_config);
switch (prop_id) {
case PROP_WIDTH:
GST_RAW_BASE_PARSE_CONFIG_MUTEX_LOCK (object);
g_value_set_int (value, props_cfg->width);
GST_RAW_BASE_PARSE_CONFIG_MUTEX_UNLOCK (object);
break;
case PROP_HEIGHT:
GST_RAW_BASE_PARSE_CONFIG_MUTEX_LOCK (object);
g_value_set_int (value, props_cfg->height);
GST_RAW_BASE_PARSE_CONFIG_MUTEX_UNLOCK (object);
break;
case PROP_FORMAT:
GST_RAW_BASE_PARSE_CONFIG_MUTEX_LOCK (object);
g_value_set_enum (value, props_cfg->format);
GST_RAW_BASE_PARSE_CONFIG_MUTEX_UNLOCK (object);
break;
case PROP_PIXEL_ASPECT_RATIO:
GST_RAW_BASE_PARSE_CONFIG_MUTEX_LOCK (object);
gst_value_set_fraction (value, props_cfg->pixel_aspect_ratio_n,
props_cfg->pixel_aspect_ratio_d);
GST_RAW_BASE_PARSE_CONFIG_MUTEX_UNLOCK (object);
break;
case PROP_FRAMERATE:
GST_RAW_BASE_PARSE_CONFIG_MUTEX_LOCK (object);
gst_value_set_fraction (value, props_cfg->framerate_n,
props_cfg->framerate_d);
GST_RAW_BASE_PARSE_CONFIG_MUTEX_UNLOCK (object);
break;
case PROP_INTERLACED:
GST_RAW_BASE_PARSE_CONFIG_MUTEX_LOCK (object);
g_value_set_boolean (value, props_cfg->interlaced);
GST_RAW_BASE_PARSE_CONFIG_MUTEX_UNLOCK (object);
break;
case PROP_TOP_FIELD_FIRST:
GST_RAW_BASE_PARSE_CONFIG_MUTEX_LOCK (object);
g_value_set_boolean (value, props_cfg->top_field_first);
GST_RAW_BASE_PARSE_CONFIG_MUTEX_UNLOCK (object);
break;
case PROP_PLANE_STRIDES:
{
guint i, n_planes;
GValue val = G_VALUE_INIT;
GValueArray *valarray;
GST_RAW_BASE_PARSE_CONFIG_MUTEX_LOCK (object);
n_planes = GST_VIDEO_INFO_N_PLANES (&(props_cfg->info));
valarray = g_value_array_new (n_planes);
g_value_init (&val, G_TYPE_UINT);
for (i = 0; i < n_planes; ++i) {
g_value_set_uint (&val, props_cfg->plane_strides[i]);
g_value_array_insert (valarray, i, &val);
}
g_value_unset (&val);
GST_RAW_BASE_PARSE_CONFIG_MUTEX_UNLOCK (object);
/* Pass on ownership to the value array,
* since we don't need it anymore */
g_value_take_boxed (value, valarray);
break;
}
case PROP_PLANE_OFFSETS:
{
guint i, n_planes;
GValue val = G_VALUE_INIT;
GValueArray *valarray;
GST_RAW_BASE_PARSE_CONFIG_MUTEX_LOCK (object);
n_planes = GST_VIDEO_INFO_N_PLANES (&(props_cfg->info));
valarray = g_value_array_new (n_planes);
g_value_init (&val, G_TYPE_UINT);
for (i = 0; i < n_planes; ++i) {
g_value_set_uint (&val, props_cfg->plane_offsets[i]);
g_value_array_insert (valarray, i, &val);
}
g_value_unset (&val);
GST_RAW_BASE_PARSE_CONFIG_MUTEX_UNLOCK (object);
/* Pass on ownership to the value array,
* since we don't need it anymore */
g_value_take_boxed (value, valarray);
break;
}
case PROP_FRAME_STRIDE:
GST_RAW_BASE_PARSE_CONFIG_MUTEX_LOCK (object);
g_value_set_uint (value, raw_video_parse->properties_config.frame_stride);
GST_RAW_BASE_PARSE_CONFIG_MUTEX_UNLOCK (object);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_raw_video_parse_stop (GstBaseParse * parse)
{
GstRawVideoParse *raw_video_parse = GST_RAW_VIDEO_PARSE (parse);
/* Sink caps config is not ready until caps come in.
* We are stopping processing, the element is being reset,
* so the config has to be un-readied.
* (Since the properties config is not depending on caps,
* its ready status is always TRUE.) */
raw_video_parse->sink_caps_config.ready = FALSE;
return GST_BASE_PARSE_CLASS (parent_class)->stop (parse);
}
static gboolean
gst_raw_video_parse_set_current_config (GstRawBaseParse * raw_base_parse,
GstRawBaseParseConfig config)
{
GstRawVideoParse *raw_video_parse = GST_RAW_VIDEO_PARSE (raw_base_parse);
switch (config) {
case GST_RAW_BASE_PARSE_CONFIG_PROPERTIES:
raw_video_parse->current_config = &(raw_video_parse->properties_config);
break;
case GST_RAW_BASE_PARSE_CONFIG_SINKCAPS:
raw_video_parse->current_config = &(raw_video_parse->sink_caps_config);
break;
default:
g_assert_not_reached ();
}
return TRUE;
}
static GstRawBaseParseConfig
gst_raw_video_parse_get_current_config (GstRawBaseParse * raw_base_parse)
{
GstRawVideoParse *raw_video_parse = GST_RAW_VIDEO_PARSE (raw_base_parse);
return gst_raw_video_parse_is_using_sink_caps (raw_video_parse) ?
GST_RAW_BASE_PARSE_CONFIG_SINKCAPS : GST_RAW_BASE_PARSE_CONFIG_PROPERTIES;
}
static gboolean
gst_raw_video_parse_set_config_from_caps (GstRawBaseParse * raw_base_parse,
GstRawBaseParseConfig config, GstCaps * caps)
{
int i;
GstStructure *structure;
GstRawVideoParse *raw_video_parse = GST_RAW_VIDEO_PARSE (raw_base_parse);
GstRawVideoParseConfig *config_ptr =
gst_raw_video_parse_get_config_ptr (raw_video_parse, config);
g_assert (caps != NULL);
/* Caps might get copied, and the copy needs to be unref'd.
* Also, the caller retains ownership over the original caps.
* So, to make this mechanism also work with cases where the
* caps are *not* copied, ref the original caps here first. */
gst_caps_ref (caps);
structure = gst_caps_get_structure (caps, 0);
/* For unaligned raw data, the output caps stay the same,
* except that video/x-unaligned-raw becomes video/x-raw,
* since the parser aligns the frame data */
if (gst_structure_has_name (structure, "video/x-unaligned-raw")) {
/* Copy the caps to be able to modify them */
GstCaps *new_caps = gst_caps_copy (caps);
gst_caps_unref (caps);
caps = new_caps;
/* Change the media type to video/x-raw , otherwise
* gst_video_info_from_caps() won't work */
structure = gst_caps_get_structure (caps, 0);
gst_structure_set_name (structure, "video/x-raw");
}
config_ptr->ready = gst_video_info_from_caps (&(config_ptr->info), caps);
if (config_ptr->ready) {
config_ptr->width = GST_VIDEO_INFO_WIDTH (&(config_ptr->info));
config_ptr->height = GST_VIDEO_INFO_HEIGHT (&(config_ptr->info));
config_ptr->pixel_aspect_ratio_n =
GST_VIDEO_INFO_PAR_N (&(config_ptr->info));
config_ptr->pixel_aspect_ratio_d =
GST_VIDEO_INFO_PAR_D (&(config_ptr->info));
config_ptr->framerate_n = GST_VIDEO_INFO_FPS_N (&(config_ptr->info));
config_ptr->framerate_d = GST_VIDEO_INFO_FPS_D (&(config_ptr->info));
config_ptr->interlaced = GST_VIDEO_INFO_IS_INTERLACED (&(config_ptr->info));
config_ptr->height = GST_VIDEO_INFO_HEIGHT (&(config_ptr->info));
config_ptr->top_field_first = 0;
config_ptr->frame_stride = 0;
for (i = 0; i < GST_VIDEO_MAX_PLANES; ++i) {
config_ptr->plane_offsets[i] =
GST_VIDEO_INFO_PLANE_OFFSET (&(config_ptr->info), i);
config_ptr->plane_strides[i] =
GST_VIDEO_INFO_PLANE_STRIDE (&(config_ptr->info), i);
}
}
gst_caps_unref (caps);
return config_ptr->ready;
}
static gboolean
gst_raw_video_parse_get_caps_from_config (GstRawBaseParse * raw_base_parse,
GstRawBaseParseConfig config, GstCaps ** caps)
{
GstRawVideoParse *raw_video_parse = GST_RAW_VIDEO_PARSE (raw_base_parse);
GstRawVideoParseConfig *config_ptr =
gst_raw_video_parse_get_config_ptr (raw_video_parse, config);
g_assert (caps != NULL);
*caps = gst_video_info_to_caps (&(config_ptr->info));
return *caps != NULL;
}
static gsize
gst_raw_video_parse_get_config_frame_size (GstRawBaseParse * raw_base_parse,
GstRawBaseParseConfig config)
{
GstRawVideoParse *raw_video_parse = GST_RAW_VIDEO_PARSE (raw_base_parse);
GstRawVideoParseConfig *config_ptr =
gst_raw_video_parse_get_config_ptr (raw_video_parse, config);
return MAX (GST_VIDEO_INFO_SIZE (&(config_ptr->info)),
(gsize) (config_ptr->frame_stride));
}
static guint
gst_raw_video_parse_get_max_frames_per_buffer (G_GNUC_UNUSED GstRawBaseParse *
raw_base_parse, G_GNUC_UNUSED GstRawBaseParseConfig config)
{
/* We want exactly one frame per buffer */
return 1;
}
static gboolean
gst_raw_video_parse_is_config_ready (GstRawBaseParse * raw_base_parse,
GstRawBaseParseConfig config)
{
GstRawVideoParse *raw_video_parse = GST_RAW_VIDEO_PARSE (raw_base_parse);
return gst_raw_video_parse_get_config_ptr (raw_video_parse, config)->ready;
}
static gboolean
gst_raw_video_parse_process (GstRawBaseParse * raw_base_parse,
GstRawBaseParseConfig config, GstBuffer * in_data,
G_GNUC_UNUSED gsize total_num_in_bytes,
G_GNUC_UNUSED gsize num_valid_in_bytes, GstBuffer ** processed_data)
{
GstRawVideoParse *raw_video_parse = GST_RAW_VIDEO_PARSE (raw_base_parse);
GstRawVideoParseConfig *config_ptr =
gst_raw_video_parse_get_config_ptr (raw_video_parse, config);
guint frame_flags = 0;
GstVideoInfo *video_info = &(config_ptr->info);
GstVideoMeta *videometa;
GstBuffer *out_data;
/* In case of extra padding bytes, get a subbuffer without the padding bytes.
* Otherwise, just add the video meta. */
if (GST_VIDEO_INFO_SIZE (video_info) < config_ptr->frame_stride) {
*processed_data = out_data =
gst_buffer_copy_region (in_data,
GST_BUFFER_COPY_FLAGS | GST_BUFFER_COPY_TIMESTAMPS |
GST_BUFFER_COPY_MEMORY, 0, GST_VIDEO_INFO_SIZE (video_info));
} else {
out_data = in_data;
*processed_data = NULL;
}
if (config_ptr->interlaced) {
GST_BUFFER_FLAG_SET (out_data, GST_VIDEO_BUFFER_FLAG_INTERLACED);
frame_flags |= GST_VIDEO_FRAME_FLAG_INTERLACED;
if (config_ptr->top_field_first) {
GST_BUFFER_FLAG_SET (out_data, GST_VIDEO_BUFFER_FLAG_TFF);
frame_flags |= GST_VIDEO_FRAME_FLAG_TFF;
} else
GST_BUFFER_FLAG_UNSET (out_data, GST_VIDEO_BUFFER_FLAG_TFF);
}
/* Remove any existing videometa - it will be replaced by the new videometa
* from here */
while ((videometa = gst_buffer_get_video_meta (out_data))) {
GST_LOG_OBJECT (raw_base_parse, "removing existing videometa from buffer");
gst_buffer_remove_meta (out_data, (GstMeta *) videometa);
}
gst_buffer_add_video_meta_full (out_data,
frame_flags,
config_ptr->format,
config_ptr->width,
config_ptr->height,
GST_VIDEO_INFO_N_PLANES (video_info),
config_ptr->plane_offsets, config_ptr->plane_strides);
return TRUE;
}
static gboolean
gst_raw_video_parse_is_unit_format_supported (G_GNUC_UNUSED GstRawBaseParse *
raw_base_parse, GstFormat format)
{
switch (format) {
case GST_FORMAT_BYTES:
case GST_FORMAT_DEFAULT:
return TRUE;
default:
return FALSE;
}
}
static void
gst_raw_video_parse_get_units_per_second (GstRawBaseParse * raw_base_parse,
GstFormat format, GstRawBaseParseConfig config, gsize * units_per_sec_n,
gsize * units_per_sec_d)
{
GstRawVideoParse *raw_video_parse = GST_RAW_VIDEO_PARSE (raw_base_parse);
GstRawVideoParseConfig *config_ptr =
gst_raw_video_parse_get_config_ptr (raw_video_parse, config);
switch (format) {
case GST_FORMAT_BYTES:
{
gsize framesize = GST_VIDEO_INFO_SIZE (&(config_ptr->info));
gint64 n = framesize * config_ptr->framerate_n;
gint64 d = config_ptr->framerate_d;
gint64 common_div = gst_util_greatest_common_divisor_int64 (n, d);
GST_DEBUG_OBJECT (raw_video_parse,
"n: %" G_GINT64_FORMAT " d: %" G_GINT64_FORMAT " common divisor: %"
G_GINT64_FORMAT, n, d, common_div);
/* Divide numerator and denominator by greatest common divisor.
* This minimizes the risk of integer overflows in the baseparse class. */
*units_per_sec_n = n / common_div;
*units_per_sec_d = d / common_div;
break;
}
case GST_FORMAT_DEFAULT:
{
*units_per_sec_n = config_ptr->framerate_n;
*units_per_sec_d = config_ptr->framerate_d;
break;
}
default:
g_assert_not_reached ();
}
}
static gint
gst_raw_video_parse_get_overhead_size (GstRawBaseParse * raw_base_parse,
GstRawBaseParseConfig config)
{
GstRawVideoParse *raw_video_parse = GST_RAW_VIDEO_PARSE (raw_base_parse);
GstRawVideoParseConfig *config_ptr =
gst_raw_video_parse_get_config_ptr (raw_video_parse, config);
gint64 frame_size = GST_VIDEO_INFO_SIZE (&(config_ptr->info));
gint64 frame_stride = config_ptr->frame_stride;
/* In the video parser, the overhead is defined by the difference between
* the frame stride and the actual frame size. If the former is larger,
* then the additional bytes are considered padding bytes and get ignored
* by the base class. */
GST_LOG_OBJECT (raw_video_parse,
"frame size: %" G_GINT64_FORMAT " frame stride: %" G_GINT64_FORMAT,
frame_size, frame_stride);
return (frame_size < frame_stride) ? (gint) (frame_stride - frame_size) : 0;
}
static gboolean
gst_raw_video_parse_is_using_sink_caps (GstRawVideoParse * raw_video_parse)
{
return raw_video_parse->current_config ==
&(raw_video_parse->sink_caps_config);
}
static GstRawVideoParseConfig *
gst_raw_video_parse_get_config_ptr (GstRawVideoParse * raw_video_parse,
GstRawBaseParseConfig config)
{
g_assert (raw_video_parse->current_config != NULL);
switch (config) {
case GST_RAW_BASE_PARSE_CONFIG_PROPERTIES:
return &(raw_video_parse->properties_config);
case GST_RAW_BASE_PARSE_CONFIG_SINKCAPS:
return &(raw_video_parse->sink_caps_config);
default:
g_assert (raw_video_parse->current_config != NULL);
return raw_video_parse->current_config;
}
}
static void
gst_raw_video_parse_init_config (GstRawVideoParseConfig * config)
{
int i;
config->ready = FALSE;
config->width = DEFAULT_WIDTH;
config->height = DEFAULT_HEIGHT;
config->format = DEFAULT_FORMAT;
config->pixel_aspect_ratio_n = DEFAULT_PIXEL_ASPECT_RATIO_N;
config->pixel_aspect_ratio_d = DEFAULT_PIXEL_ASPECT_RATIO_D;
config->framerate_n = DEFAULT_FRAMERATE_N;
config->framerate_d = DEFAULT_FRAMERATE_D;
config->interlaced = DEFAULT_INTERLACED;
config->top_field_first = DEFAULT_TOP_FIELD_FIRST;
config->frame_stride = DEFAULT_FRAME_STRIDE;
gst_video_info_set_format (&(config->info), DEFAULT_FORMAT, DEFAULT_WIDTH,
DEFAULT_HEIGHT);
for (i = 0; i < GST_VIDEO_MAX_PLANES; ++i) {
config->plane_offsets[i] = GST_VIDEO_INFO_PLANE_OFFSET (&(config->info), i);
config->plane_strides[i] = GST_VIDEO_INFO_PLANE_STRIDE (&(config->info), i);
}
}
static void
gst_raw_video_parse_update_info (GstRawVideoParseConfig * config)
{
guint i;
guint n_planes;
guint last_plane;
gsize last_plane_offset, last_plane_size;
GstVideoInfo *info = &(config->info);
GST_DEBUG ("updating info with width %u height %u format %s "
" custom plane strides&offsets %d", config->width, config->height,
gst_video_format_to_string (config->format),
config->custom_plane_strides);
gst_video_info_set_format (info, config->format, config->width,
config->height);
GST_VIDEO_INFO_PAR_N (info) = config->pixel_aspect_ratio_n;
GST_VIDEO_INFO_PAR_D (info) = config->pixel_aspect_ratio_d;
GST_VIDEO_INFO_FPS_N (info) = config->framerate_n;
GST_VIDEO_INFO_FPS_D (info) = config->framerate_d;
GST_VIDEO_INFO_INTERLACE_MODE (info) =
config->interlaced ? GST_VIDEO_INTERLACE_MODE_INTERLEAVED :
GST_VIDEO_INTERLACE_MODE_PROGRESSIVE;
/* Check if there are custom plane strides & offsets that need to be preserved */
if (config->custom_plane_strides) {
/* In case there are, overwrite the offsets&strides computed by
* gst_video_info_set_format with the custom ones */
for (i = 0; i < GST_VIDEO_MAX_PLANES; ++i) {
GST_VIDEO_INFO_PLANE_OFFSET (info, i) = config->plane_offsets[i];
GST_VIDEO_INFO_PLANE_STRIDE (info, i) = config->plane_strides[i];
}
} else {
/* No custom planes&offsets; copy the computed ones into
* the plane_offsets & plane_strides arrays to ensure they
* are equal to the ones in the videoinfo */
for (i = 0; i < GST_VIDEO_MAX_PLANES; ++i) {
config->plane_offsets[i] = GST_VIDEO_INFO_PLANE_OFFSET (info, i);
config->plane_strides[i] = GST_VIDEO_INFO_PLANE_STRIDE (info, i);
}
}
n_planes = GST_VIDEO_INFO_N_PLANES (info);
if (n_planes < 1)
n_planes = 1;
/* Figure out what plane is the physically last one. Typically
* this is the last plane in the list (= at index n_planes-1).
* However, this is not guaranteed, so we have to scan the offsets
* to find the last plane. */
last_plane_offset = 0;
last_plane = 0;
for (i = 0; i < n_planes; ++i) {
gsize plane_offset = GST_VIDEO_INFO_PLANE_OFFSET (info, i);
if (plane_offset >= last_plane_offset) {
last_plane = i;
last_plane_offset = plane_offset;
}
}
last_plane_size =
GST_VIDEO_INFO_PLANE_STRIDE (info,
last_plane) * GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (info->finfo,
last_plane, config->height);
GST_VIDEO_INFO_SIZE (info) = last_plane_offset + last_plane_size;
GST_DEBUG ("last plane #%u: offset: %" G_GSIZE_FORMAT " size: %"
G_GSIZE_FORMAT " => frame size minus extra padding: %" G_GSIZE_FORMAT,
last_plane, last_plane_offset, last_plane_size,
GST_VIDEO_INFO_SIZE (info));
}
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