gstreamer/gst/vaapi/gstvaapiencode_h265.c
Víctor Manuel Jáquez Leal 7d6a80e13d vaapiencode: h265: compare an unsigned int if not zero
An unsigned value can never be negative, so this test (greater than
zero) will always evaluate the same way. Thus change it to just if
it's not zero.
2017-08-01 18:38:40 +02:00

439 lines
13 KiB
C

/*
* gstvaapiencode_h265.c - VA-API H.265 encoder
*
* Copyright (C) 2015 Intel Corporation
* Author: Sreerenj Balachandran <sreerenj.balachandran@intel.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
/**
* SECTION:element-vaapih265enc
* @short_description: A VA-API based HEVC video encoder
*
* Encodes raw video streams into HEVC bitstreams.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch-1.0 -ev videotestsrc num-buffers=60 ! timeoverlay ! vaapih265enc ! h265parse ! matroskamux ! filesink location=test.mkv
* ]|
* </refsect2>
*/
#include "gstcompat.h"
#include <gst/vaapi/gstvaapidisplay.h>
#include <gst/vaapi/gstvaapiencoder_h265.h>
#include <gst/vaapi/gstvaapiutils_h265.h>
#include "gstvaapiencode_h265.h"
#include "gstvaapipluginutil.h"
#include "gstvaapivideomemory.h"
#define GST_PLUGIN_NAME "vaapih265enc"
#define GST_PLUGIN_DESC "A VA-API based H265 video encoder"
GST_DEBUG_CATEGORY_STATIC (gst_vaapi_h265_encode_debug);
#define GST_CAT_DEFAULT gst_vaapi_h265_encode_debug
#define GST_CODEC_CAPS \
"video/x-h265, " \
"stream-format = (string) { hvc1, byte-stream }, " \
"alignment = (string) au"
/* *INDENT-OFF* */
static const char gst_vaapiencode_h265_sink_caps_str[] =
GST_VAAPI_MAKE_SURFACE_CAPS ", "
GST_CAPS_INTERLACED_FALSE "; "
GST_VIDEO_CAPS_MAKE (GST_VIDEO_FORMATS_ALL) ", "
GST_CAPS_INTERLACED_FALSE;
/* *INDENT-ON* */
/* *INDENT-OFF* */
static const char gst_vaapiencode_h265_src_caps_str[] =
GST_CODEC_CAPS ", "
"profile = (string) { main, main-10 }";
/* *INDENT-ON* */
/* *INDENT-OFF* */
static GstStaticPadTemplate gst_vaapiencode_h265_sink_factory =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (gst_vaapiencode_h265_sink_caps_str));
/* *INDENT-ON* */
/* *INDENT-OFF* */
static GstStaticPadTemplate gst_vaapiencode_h265_src_factory =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (gst_vaapiencode_h265_src_caps_str));
/* *INDENT-ON* */
/* h265 encode */
G_DEFINE_TYPE (GstVaapiEncodeH265, gst_vaapiencode_h265, GST_TYPE_VAAPIENCODE);
static void
gst_vaapiencode_h265_init (GstVaapiEncodeH265 * encode)
{
gst_vaapiencode_init_properties (GST_VAAPIENCODE_CAST (encode));
}
static void
gst_vaapiencode_h265_finalize (GObject * object)
{
G_OBJECT_CLASS (gst_vaapiencode_h265_parent_class)->finalize (object);
}
static void
gst_vaapiencode_h265_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec)
{
GstVaapiEncodeClass *const encode_class = GST_VAAPIENCODE_GET_CLASS (object);
GstVaapiEncode *const base_encode = GST_VAAPIENCODE_CAST (object);
switch (prop_id) {
default:
if (!encode_class->set_property (base_encode, prop_id, value))
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_vaapiencode_h265_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec)
{
GstVaapiEncodeClass *const encode_class = GST_VAAPIENCODE_GET_CLASS (object);
GstVaapiEncode *const base_encode = GST_VAAPIENCODE_CAST (object);
switch (prop_id) {
default:
if (!encode_class->get_property (base_encode, prop_id, value))
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstVaapiProfile
gst_vaapiencode_h265_get_profile (GstCaps * caps)
{
guint i;
for (i = 0; i < gst_caps_get_size (caps); i++) {
GstStructure *const structure = gst_caps_get_structure (caps, i);
const GValue *const value = gst_structure_get_value (structure, "profile");
if (value && G_VALUE_HOLDS_STRING (value)) {
const gchar *str = g_value_get_string (value);
if (str)
return gst_vaapi_utils_h265_get_profile_from_string (str);
}
}
return GST_VAAPI_PROFILE_UNKNOWN;
}
typedef struct
{
GstVaapiProfile best_profile;
guint best_score;
} FindBestProfileData;
static void
find_best_profile_value (FindBestProfileData * data, const GValue * value)
{
const gchar *str;
GstVaapiProfile profile;
guint score;
if (!value || !G_VALUE_HOLDS_STRING (value))
return;
str = g_value_get_string (value);
if (!str)
return;
profile = gst_vaapi_utils_h265_get_profile_from_string (str);
if (!profile)
return;
score = gst_vaapi_utils_h265_get_profile_score (profile);
if (score < data->best_score)
return;
data->best_profile = profile;
data->best_score = score;
}
static GstVaapiProfile
find_best_profile (GstCaps * caps)
{
FindBestProfileData data;
guint i, j, num_structures, num_values;
data.best_profile = GST_VAAPI_PROFILE_UNKNOWN;
data.best_score = 0;
num_structures = gst_caps_get_size (caps);
for (i = 0; i < num_structures; i++) {
GstStructure *const structure = gst_caps_get_structure (caps, i);
const GValue *const value = gst_structure_get_value (structure, "profile");
if (!value)
continue;
if (G_VALUE_HOLDS_STRING (value))
find_best_profile_value (&data, value);
else if (GST_VALUE_HOLDS_LIST (value)) {
num_values = gst_value_list_get_size (value);
for (j = 0; j < num_values; j++)
find_best_profile_value (&data, gst_value_list_get_value (value, j));
}
}
return data.best_profile;
}
static gboolean
gst_vaapiencode_h265_set_config (GstVaapiEncode * base_encode)
{
GstVaapiEncoderH265 *const encoder =
GST_VAAPI_ENCODER_H265 (base_encode->encoder);
GstCaps *allowed_caps;
GstVaapiProfile profile;
/* Check for the largest profile that is supported */
allowed_caps =
gst_pad_get_allowed_caps (GST_VAAPI_PLUGIN_BASE_SRC_PAD (base_encode));
if (!allowed_caps)
return TRUE;
profile = find_best_profile (allowed_caps);
gst_caps_unref (allowed_caps);
if (profile) {
GST_INFO ("using %s profile as target decoder constraints",
gst_vaapi_utils_h265_get_profile_string (profile));
if (!gst_vaapi_encoder_h265_set_max_profile (encoder, profile))
return FALSE;
}
return TRUE;
}
static GstCaps *
gst_vaapiencode_h265_get_caps (GstVaapiEncode * base_encode)
{
GstVaapiEncodeH265 *const encode = GST_VAAPIENCODE_H265_CAST (base_encode);
GstCaps *caps, *allowed_caps;
caps = gst_caps_from_string (GST_CODEC_CAPS);
/* Check whether "stream-format" is hvcC mode */
allowed_caps =
gst_pad_get_allowed_caps (GST_VAAPI_PLUGIN_BASE_SRC_PAD (encode));
if (allowed_caps) {
const char *stream_format = NULL;
GstStructure *structure;
guint i, num_structures;
num_structures = gst_caps_get_size (allowed_caps);
for (i = 0; !stream_format && i < num_structures; i++) {
structure = gst_caps_get_structure (allowed_caps, i);
if (!gst_structure_has_field_typed (structure, "stream-format",
G_TYPE_STRING))
continue;
stream_format = gst_structure_get_string (structure, "stream-format");
}
encode->is_hvc = stream_format && strcmp (stream_format, "hvc1") == 0;
gst_caps_unref (allowed_caps);
}
gst_caps_set_simple (caps, "stream-format", G_TYPE_STRING,
encode->is_hvc ? "hvc1" : "byte-stream", NULL);
base_encode->need_codec_data = encode->is_hvc;
/* XXX: update profile and level information */
return caps;
}
static GstVaapiEncoder *
gst_vaapiencode_h265_alloc_encoder (GstVaapiEncode * base,
GstVaapiDisplay * display)
{
return gst_vaapi_encoder_h265_new (display);
}
/* h265 NAL byte stream operations */
static guint8 *
_h265_byte_stream_next_nal (guint8 * buffer, guint32 len, guint32 * nal_size)
{
const guint8 *cur = buffer;
const guint8 *const end = buffer + len;
guint8 *nal_start = NULL;
guint32 flag = 0xFFFFFFFF;
guint32 nal_start_len = 0;
g_assert (len != 0U && buffer && nal_size);
if (len < 3) {
*nal_size = len;
nal_start = (len ? buffer : NULL);
return nal_start;
}
/*locate head postion */
if (!buffer[0] && !buffer[1]) {
if (buffer[2] == 1) { /* 0x000001 */
nal_start_len = 3;
} else if (!buffer[2] && len >= 4 && buffer[3] == 1) { /* 0x00000001 */
nal_start_len = 4;
}
}
nal_start = buffer + nal_start_len;
cur = nal_start;
/*find next nal start position */
while (cur < end) {
flag = ((flag << 8) | ((*cur++) & 0xFF));
if ((flag & 0x00FFFFFF) == 0x00000001) {
if (flag == 0x00000001)
*nal_size = cur - 4 - nal_start;
else
*nal_size = cur - 3 - nal_start;
break;
}
}
if (cur >= end) {
*nal_size = end - nal_start;
if (nal_start >= end) {
nal_start = NULL;
}
}
return nal_start;
}
static inline void
_start_code_to_size (guint8 nal_start_code[4], guint32 nal_size)
{
nal_start_code[0] = ((nal_size >> 24) & 0xFF);
nal_start_code[1] = ((nal_size >> 16) & 0xFF);
nal_start_code[2] = ((nal_size >> 8) & 0xFF);
nal_start_code[3] = (nal_size & 0xFF);
}
static gboolean
_h265_convert_byte_stream_to_hvc (GstBuffer * buf)
{
GstMapInfo info;
guint32 nal_size;
guint8 *nal_start_code, *nal_body;
guint8 *frame_end;
g_assert (buf);
if (!gst_buffer_map (buf, &info, GST_MAP_READ | GST_MAP_WRITE))
return FALSE;
nal_start_code = info.data;
frame_end = info.data + info.size;
nal_size = 0;
while ((frame_end > nal_start_code) &&
(nal_body = _h265_byte_stream_next_nal (nal_start_code,
frame_end - nal_start_code, &nal_size)) != NULL) {
if (!nal_size)
goto error;
g_assert (nal_body - nal_start_code == 4);
_start_code_to_size (nal_start_code, nal_size);
nal_start_code = nal_body + nal_size;
}
gst_buffer_unmap (buf, &info);
return TRUE;
/* ERRORS */
error:
{
gst_buffer_unmap (buf, &info);
return FALSE;
}
}
static GstFlowReturn
gst_vaapiencode_h265_alloc_buffer (GstVaapiEncode * base_encode,
GstVaapiCodedBuffer * coded_buf, GstBuffer ** out_buffer_ptr)
{
GstVaapiEncodeH265 *const encode = GST_VAAPIENCODE_H265_CAST (base_encode);
GstVaapiEncoderH265 *const encoder =
GST_VAAPI_ENCODER_H265 (base_encode->encoder);
GstFlowReturn ret;
g_return_val_if_fail (encoder != NULL, GST_FLOW_ERROR);
ret =
GST_VAAPIENCODE_CLASS (gst_vaapiencode_h265_parent_class)->alloc_buffer
(base_encode, coded_buf, out_buffer_ptr);
if (ret != GST_FLOW_OK)
return ret;
if (!encode->is_hvc)
return GST_FLOW_OK;
/* Convert to hvcC format */
if (!_h265_convert_byte_stream_to_hvc (*out_buffer_ptr))
goto error_convert_buffer;
return GST_FLOW_OK;
/* ERRORS */
error_convert_buffer:
{
GST_ERROR ("failed to convert from bytestream format to hvcC format");
gst_buffer_replace (out_buffer_ptr, NULL);
return GST_FLOW_ERROR;
}
}
static void
gst_vaapiencode_h265_class_init (GstVaapiEncodeH265Class * klass)
{
GObjectClass *const object_class = G_OBJECT_CLASS (klass);
GstElementClass *const element_class = GST_ELEMENT_CLASS (klass);
GstVaapiEncodeClass *const encode_class = GST_VAAPIENCODE_CLASS (klass);
GST_DEBUG_CATEGORY_INIT (gst_vaapi_h265_encode_debug,
GST_PLUGIN_NAME, 0, GST_PLUGIN_DESC);
object_class->finalize = gst_vaapiencode_h265_finalize;
object_class->set_property = gst_vaapiencode_h265_set_property;
object_class->get_property = gst_vaapiencode_h265_get_property;
encode_class->get_properties = gst_vaapi_encoder_h265_get_default_properties;
encode_class->get_profile = gst_vaapiencode_h265_get_profile;
encode_class->set_config = gst_vaapiencode_h265_set_config;
encode_class->get_caps = gst_vaapiencode_h265_get_caps;
encode_class->alloc_encoder = gst_vaapiencode_h265_alloc_encoder;
encode_class->alloc_buffer = gst_vaapiencode_h265_alloc_buffer;
gst_element_class_set_static_metadata (element_class,
"VA-API H265 encoder",
"Codec/Encoder/Video",
GST_PLUGIN_DESC,
"Sreerenj Balachandran <sreerenj.balachandran@intel.com>");
/* sink pad */
gst_element_class_add_static_pad_template (element_class,
&gst_vaapiencode_h265_sink_factory);
/* src pad */
gst_element_class_add_static_pad_template (element_class,
&gst_vaapiencode_h265_src_factory);
gst_vaapiencode_class_init_properties (encode_class);
}