gstreamer/subprojects/gstreamer-vaapi/gst/vaapi/gstvaapiencode_h265.c

404 lines
12 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.
*
* ## Example launch line
*
* |[
* gst-launch-1.0 -ev videotestsrc num-buffers=60 ! timeoverlay ! vaapih265enc ! h265parse ! matroskamux ! filesink location=test.mkv
* ]|
*/
#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"
#define EXTRA_FORMATS {}
/* h265 encode */
GST_VAAPI_ENCODE_REGISTER_TYPE (h265, H265, H265, EXTRA_FORMATS,
gst_vaapi_utils_h265_get_profile_string);
static void
gst_vaapiencode_h265_init (GstVaapiEncodeH265 * encode)
{
/* nothing to do here */
}
static void
gst_vaapiencode_h265_finalize (GObject * object)
{
G_OBJECT_CLASS (gst_vaapiencode_h265_parent_class)->finalize (object);
}
static GArray *
gst_vaapiencode_h265_get_allowed_profiles (GstVaapiEncode * encode,
GstCaps * allowed)
{
return gst_vaapi_encoder_get_profiles_from_caps (allowed,
gst_vaapi_utils_h265_get_profile_from_string);
}
static gboolean
gst_vaapiencode_h265_set_config (GstVaapiEncode * base_encode)
{
GstVaapiEncoderH265 *const encoder =
GST_VAAPI_ENCODER_H265 (base_encode->encoder);
GstCaps *allowed_caps = NULL;
GstCaps *template_caps = NULL;
GArray *profiles = NULL;
GArray *profiles_hw = NULL;
GArray *profiles_allowed = NULL;
GstVaapiProfile profile;
gboolean ret = TRUE;
guint i, j;
profiles_hw = gst_vaapi_display_get_encode_profiles_by_codec
(GST_VAAPI_PLUGIN_BASE_DISPLAY (base_encode), GST_VAAPI_CODEC_H265);
if (!profiles_hw) {
ret = FALSE;
goto out;
}
template_caps =
gst_pad_get_pad_template_caps (GST_VAAPI_PLUGIN_BASE_SRC_PAD
(base_encode));
allowed_caps =
gst_pad_get_allowed_caps (GST_VAAPI_PLUGIN_BASE_SRC_PAD (base_encode));
if (!allowed_caps || allowed_caps == template_caps) {
ret = gst_vaapi_encoder_h265_set_allowed_profiles (encoder, profiles_hw);
goto out;
} else if (gst_caps_is_empty (allowed_caps)) {
ret = FALSE;
goto out;
}
profiles = gst_vaapi_encoder_get_profiles_from_caps (allowed_caps,
gst_vaapi_utils_h265_get_profile_from_string);
if (!profiles) {
ret = FALSE;
goto out;
}
profiles_allowed = g_array_new (FALSE, FALSE, sizeof (GstVaapiProfile));
if (!profiles_allowed) {
ret = FALSE;
goto out;
}
for (i = 0; i < profiles->len; i++) {
profile = g_array_index (profiles, GstVaapiProfile, i);
for (j = 0; j < profiles_hw->len; j++) {
GstVaapiProfile p = g_array_index (profiles_hw, GstVaapiProfile, j);
if (p == profile) {
g_array_append_val (profiles_allowed, profile);
break;
}
}
}
if (profiles_allowed->len == 0) {
ret = FALSE;
goto out;
}
ret = gst_vaapi_encoder_h265_set_allowed_profiles (encoder, profiles_allowed);
out:
if (allowed_caps)
gst_caps_unref (allowed_caps);
if (template_caps)
gst_caps_unref (template_caps);
if (profiles)
g_array_unref (profiles);
if (profiles_hw)
g_array_unref (profiles_hw);
if (profiles_allowed)
g_array_unref (profiles_allowed);
return ret;
}
static GstCaps *
gst_vaapiencode_h265_get_caps (GstVaapiEncode * base_encode)
{
GstVaapiEncodeH265 *const encode = GST_VAAPIENCODE_H265_CAST (base_encode);
GstVaapiEncoderH265 *const encoder =
GST_VAAPI_ENCODER_H265 (base_encode->encoder);
GstCaps *caps, *allowed_caps;
GstVaapiProfile profile = GST_VAAPI_PROFILE_UNKNOWN;
GstVaapiLevelH265 level = 0;
GstVaapiTierH265 tier = GST_VAAPI_TIER_H265_UNKNOWN;
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;
gst_vaapi_encoder_h265_get_profile_tier_level (encoder,
&profile, &tier, &level);
if (profile != GST_VAAPI_PROFILE_UNKNOWN) {
gst_caps_set_simple (caps, "profile", G_TYPE_STRING,
gst_vaapi_utils_h265_get_profile_string (profile), NULL);
if (level) {
gst_caps_set_simple (caps, "level", G_TYPE_STRING,
gst_vaapi_utils_h265_get_level_string (level), NULL);
if (tier != GST_VAAPI_TIER_H265_UNKNOWN)
gst_caps_set_simple (caps, "tier", G_TYPE_STRING,
gst_vaapi_utils_h265_get_tier_string (tier), NULL);
}
}
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, gpointer data)
{
GObjectClass *const object_class = G_OBJECT_CLASS (klass);
GstElementClass *const element_class = GST_ELEMENT_CLASS (klass);
GstVaapiEncodeClass *const encode_class = GST_VAAPIENCODE_CLASS (klass);
GstCaps *sink_caps = ((GstVaapiEncodeInitData *) data)->sink_caps;
GstCaps *src_caps = ((GstVaapiEncodeInitData *) data)->src_caps;
GstPadTemplate *templ;
GstCaps *static_caps;
gpointer encoder_class;
object_class->finalize = gst_vaapiencode_h265_finalize;
object_class->set_property = gst_vaapiencode_set_property_subclass;
object_class->get_property = gst_vaapiencode_get_property_subclass;
encode_class->get_allowed_profiles =
gst_vaapiencode_h265_get_allowed_profiles;
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/Hardware",
GST_PLUGIN_DESC,
"Sreerenj Balachandran <sreerenj.balachandran@intel.com>");
/* sink pad */
g_assert (sink_caps);
static_caps = gst_caps_from_string (GST_VAAPI_ENCODE_STATIC_SINK_CAPS);
templ =
gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, sink_caps);
gst_pad_template_set_documentation_caps (templ, static_caps);
gst_element_class_add_pad_template (element_class, templ);
gst_caps_unref (static_caps);
gst_caps_unref (sink_caps);
/* src pad */
g_assert (src_caps);
static_caps = gst_caps_from_string (GST_CODEC_CAPS);
templ = gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS, src_caps);
gst_pad_template_set_documentation_caps (templ, static_caps);
gst_element_class_add_pad_template (element_class, templ);
gst_caps_unref (static_caps);
gst_caps_unref (src_caps);
encoder_class = g_type_class_ref (GST_TYPE_VAAPI_ENCODER_H265);
g_assert (encoder_class);
gst_vaapiencode_class_install_properties (encode_class, encoder_class);
g_type_class_unref (encoder_class);
}