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obs-ffmpeg-nvenc.c
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obs-ffmpeg-nvenc.c
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/******************************************************************************
Copyright (C) 2016 by Hugh Bailey <obs.jim@gmail.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
******************************************************************************/
#include <util/darray.h>
#include <util/dstr.h>
#include <util/base.h>
#include <media-io/video-io.h>
#include <obs-module.h>
#include <obs-avc.h>
#include <libavutil/opt.h>
#include <libavutil/pixdesc.h>
#include <libavformat/avformat.h>
#include "obs-ffmpeg-formats.h"
#define do_log(level, format, ...) \
blog(level, "[NVENC encoder: '%s'] " format, \
obs_encoder_get_name(enc->encoder), ##__VA_ARGS__)
#define warn(format, ...) do_log(LOG_WARNING, format, ##__VA_ARGS__)
#define info(format, ...) do_log(LOG_INFO, format, ##__VA_ARGS__)
#define debug(format, ...) do_log(LOG_DEBUG, format, ##__VA_ARGS__)
struct nvenc_encoder {
obs_encoder_t *encoder;
AVCodec *nvenc;
AVCodecContext *context;
AVFrame *vframe;
DARRAY(uint8_t) buffer;
uint8_t *header;
size_t header_size;
uint8_t *sei;
size_t sei_size;
int height;
bool first_packet;
bool initialized;
};
static const char *nvenc_getname(void *unused)
{
UNUSED_PARAMETER(unused);
return "NVIDIA NVENC H.264";
}
static inline bool valid_format(enum video_format format)
{
return format == VIDEO_FORMAT_I420 || format == VIDEO_FORMAT_NV12 ||
format == VIDEO_FORMAT_I444;
}
static void nvenc_video_info(void *data, struct video_scale_info *info)
{
struct nvenc_encoder *enc = data;
enum video_format pref_format;
pref_format = obs_encoder_get_preferred_video_format(enc->encoder);
if (!valid_format(pref_format)) {
pref_format = valid_format(info->format) ? info->format
: VIDEO_FORMAT_NV12;
}
info->format = pref_format;
}
static bool nvenc_init_codec(struct nvenc_encoder *enc)
{
int ret;
// avcodec_open2 will overwrite priv_data, we call this to get a
// local copy of the "gpu" setting for improved error messages.
int64_t gpu;
if (av_opt_get_int(enc->context->priv_data, "gpu", 0, &gpu) < 0) {
gpu = -1;
}
ret = avcodec_open2(enc->context, enc->nvenc, NULL);
if (ret < 0) {
// if we were a fallback from jim-nvenc, there may already be a
// more useful error returned from that, so don't overwrite.
// this can be removed if / when ffmpeg fallback is removed.
if (!obs_encoder_get_last_error(enc->encoder)) {
struct dstr error_message = {0};
dstr_copy(&error_message,
obs_module_text("NVENC.Error"));
dstr_replace(&error_message, "%1", av_err2str(ret));
dstr_cat(&error_message, "\r\n\r\n");
if (gpu > 0) {
// if a non-zero GPU failed, almost always
// user error. tell then to fix it.
char gpu_str[16];
snprintf(gpu_str, sizeof(gpu_str) - 1, "%d",
(int)gpu);
gpu_str[sizeof(gpu_str) - 1] = 0;
dstr_cat(&error_message,
obs_module_text("NVENC.BadGPUIndex"));
dstr_replace(&error_message, "%1", gpu_str);
} else if (ret == AVERROR_EXTERNAL) {
// special case for common NVENC error
dstr_cat(&error_message,
obs_module_text("NVENC.GenericError"));
} else {
dstr_cat(&error_message,
obs_module_text("NVENC.CheckDrivers"));
}
obs_encoder_set_last_error(enc->encoder,
error_message.array);
dstr_free(&error_message);
}
warn("Failed to open NVENC codec: %s", av_err2str(ret));
return false;
}
enc->vframe = av_frame_alloc();
if (!enc->vframe) {
warn("Failed to allocate video frame");
return false;
}
enc->vframe->format = enc->context->pix_fmt;
enc->vframe->width = enc->context->width;
enc->vframe->height = enc->context->height;
enc->vframe->colorspace = enc->context->colorspace;
enc->vframe->color_range = enc->context->color_range;
ret = av_frame_get_buffer(enc->vframe, base_get_alignment());
if (ret < 0) {
warn("Failed to allocate vframe: %s", av_err2str(ret));
return false;
}
enc->initialized = true;
return true;
}
enum RC_MODE { RC_MODE_CBR, RC_MODE_VBR, RC_MODE_CQP, RC_MODE_LOSSLESS };
static bool nvenc_update(void *data, obs_data_t *settings)
{
struct nvenc_encoder *enc = data;
const char *rc = obs_data_get_string(settings, "rate_control");
int bitrate = (int)obs_data_get_int(settings, "bitrate");
int cqp = (int)obs_data_get_int(settings, "cqp");
int keyint_sec = (int)obs_data_get_int(settings, "keyint_sec");
const char *preset = obs_data_get_string(settings, "preset");
const char *profile = obs_data_get_string(settings, "profile");
int gpu = (int)obs_data_get_int(settings, "gpu");
bool cbr_override = obs_data_get_bool(settings, "cbr");
int bf = (int)obs_data_get_int(settings, "bf");
video_t *video = obs_encoder_video(enc->encoder);
const struct video_output_info *voi = video_output_get_info(video);
struct video_scale_info info;
/* XXX: "cbr" setting has been deprecated */
if (cbr_override) {
warn("\"cbr\" setting has been deprecated for all encoders! "
"Please set \"rate_control\" to \"CBR\" instead. "
"Forcing CBR mode. "
"(Note to all: this is why you shouldn't use strings for "
"common settings)");
rc = "CBR";
}
info.format = voi->format;
info.colorspace = voi->colorspace;
info.range = voi->range;
bool twopass = false;
if (astrcmpi(preset, "mq") == 0) {
twopass = true;
preset = "hq";
}
nvenc_video_info(enc, &info);
av_opt_set_int(enc->context->priv_data, "cbr", false, 0);
av_opt_set(enc->context->priv_data, "profile", profile, 0);
av_opt_set(enc->context->priv_data, "preset", preset, 0);
if (astrcmpi(rc, "cqp") == 0) {
bitrate = 0;
enc->context->global_quality = cqp;
} else if (astrcmpi(rc, "lossless") == 0) {
bitrate = 0;
cqp = 0;
bool hp = (astrcmpi(preset, "hp") == 0 ||
astrcmpi(preset, "llhp") == 0);
av_opt_set(enc->context->priv_data, "preset",
hp ? "losslesshp" : "lossless", 0);
} else if (astrcmpi(rc, "vbr") != 0) { /* CBR by default */
av_opt_set_int(enc->context->priv_data, "cbr", true, 0);
enc->context->rc_max_rate = bitrate * 1000;
enc->context->rc_min_rate = bitrate * 1000;
cqp = 0;
}
av_opt_set(enc->context->priv_data, "level", "auto", 0);
av_opt_set_int(enc->context->priv_data, "2pass", twopass, 0);
av_opt_set_int(enc->context->priv_data, "gpu", gpu, 0);
enc->context->bit_rate = bitrate * 1000;
enc->context->rc_buffer_size = bitrate * 1000;
enc->context->width = obs_encoder_get_width(enc->encoder);
enc->context->height = obs_encoder_get_height(enc->encoder);
enc->context->time_base = (AVRational){voi->fps_den, voi->fps_num};
enc->context->pix_fmt = obs_to_ffmpeg_video_format(info.format);
enc->context->color_range = info.range == VIDEO_RANGE_FULL
? AVCOL_RANGE_JPEG
: AVCOL_RANGE_MPEG;
enc->context->max_b_frames = bf;
switch (info.colorspace) {
case VIDEO_CS_601:
enc->context->color_trc = AVCOL_TRC_SMPTE170M;
enc->context->color_primaries = AVCOL_PRI_SMPTE170M;
enc->context->colorspace = AVCOL_SPC_SMPTE170M;
break;
case VIDEO_CS_DEFAULT:
case VIDEO_CS_709:
enc->context->color_trc = AVCOL_TRC_BT709;
enc->context->color_primaries = AVCOL_PRI_BT709;
enc->context->colorspace = AVCOL_SPC_BT709;
break;
case VIDEO_CS_SRGB:
enc->context->color_trc = AVCOL_TRC_IEC61966_2_1;
enc->context->color_primaries = AVCOL_PRI_BT709;
enc->context->colorspace = AVCOL_SPC_BT709;
break;
}
if (keyint_sec)
enc->context->gop_size =
keyint_sec * voi->fps_num / voi->fps_den;
else
enc->context->gop_size = 250;
enc->height = enc->context->height;
info("settings:\n"
"\trate_control: %s\n"
"\tbitrate: %d\n"
"\tcqp: %d\n"
"\tkeyint: %d\n"
"\tpreset: %s\n"
"\tprofile: %s\n"
"\twidth: %d\n"
"\theight: %d\n"
"\t2-pass: %s\n"
"\tb-frames: %d\n"
"\tGPU: %d\n",
rc, bitrate, cqp, enc->context->gop_size, preset, profile,
enc->context->width, enc->context->height,
twopass ? "true" : "false", enc->context->max_b_frames, gpu);
return nvenc_init_codec(enc);
}
static bool nvenc_reconfigure(void *data, obs_data_t *settings)
{
#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(58, 19, 101)
struct nvenc_encoder *enc = data;
int bitrate = (int)obs_data_get_int(settings, "bitrate");
const char *rc = obs_data_get_string(settings, "rate_control");
bool cbr = astrcmpi(rc, "CBR") == 0;
bool vbr = astrcmpi(rc, "VBR") == 0;
if (cbr || vbr) {
enc->context->bit_rate = bitrate * 1000;
enc->context->rc_max_rate = bitrate * 1000;
}
#endif
return true;
}
static void nvenc_destroy(void *data)
{
struct nvenc_encoder *enc = data;
if (enc->initialized) {
AVPacket pkt = {0};
int r_pkt = 1;
while (r_pkt) {
#if LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT(57, 40, 101)
if (avcodec_receive_packet(enc->context, &pkt) < 0)
break;
#else
if (avcodec_encode_video2(enc->context, &pkt, NULL,
&r_pkt) < 0)
break;
#endif
if (r_pkt)
av_packet_unref(&pkt);
}
}
avcodec_close(enc->context);
av_frame_unref(enc->vframe);
av_frame_free(&enc->vframe);
da_free(enc->buffer);
bfree(enc->header);
bfree(enc->sei);
bfree(enc);
}
static void *nvenc_create(obs_data_t *settings, obs_encoder_t *encoder)
{
struct nvenc_encoder *enc;
#if LIBAVCODEC_VERSION_INT < AV_VERSION_INT(58, 9, 100)
avcodec_register_all();
#endif
enc = bzalloc(sizeof(*enc));
enc->encoder = encoder;
enc->nvenc = avcodec_find_encoder_by_name("h264_nvenc");
if (!enc->nvenc)
enc->nvenc = avcodec_find_encoder_by_name("nvenc_h264");
enc->first_packet = true;
blog(LOG_INFO, "---------------------------------");
if (!enc->nvenc) {
obs_encoder_set_last_error(encoder,
"Couldn't find NVENC encoder");
warn("Couldn't find encoder");
goto fail;
}
enc->context = avcodec_alloc_context3(enc->nvenc);
if (!enc->context) {
warn("Failed to create codec context");
goto fail;
}
if (!nvenc_update(enc, settings))
goto fail;
return enc;
fail:
nvenc_destroy(enc);
return NULL;
}
static inline void copy_data(AVFrame *pic, const struct encoder_frame *frame,
int height, enum AVPixelFormat format)
{
int h_chroma_shift, v_chroma_shift;
av_pix_fmt_get_chroma_sub_sample(format, &h_chroma_shift,
&v_chroma_shift);
for (int plane = 0; plane < MAX_AV_PLANES; plane++) {
if (!frame->data[plane])
continue;
int frame_rowsize = (int)frame->linesize[plane];
int pic_rowsize = pic->linesize[plane];
int bytes = frame_rowsize < pic_rowsize ? frame_rowsize
: pic_rowsize;
int plane_height = height >> (plane ? v_chroma_shift : 0);
for (int y = 0; y < plane_height; y++) {
int pos_frame = y * frame_rowsize;
int pos_pic = y * pic_rowsize;
memcpy(pic->data[plane] + pos_pic,
frame->data[plane] + pos_frame, bytes);
}
}
}
static bool nvenc_encode(void *data, struct encoder_frame *frame,
struct encoder_packet *packet, bool *received_packet)
{
struct nvenc_encoder *enc = data;
AVPacket av_pkt = {0};
int got_packet;
int ret;
av_init_packet(&av_pkt);
copy_data(enc->vframe, frame, enc->height, enc->context->pix_fmt);
enc->vframe->pts = frame->pts;
#if LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT(57, 40, 101)
ret = avcodec_send_frame(enc->context, enc->vframe);
if (ret == 0)
ret = avcodec_receive_packet(enc->context, &av_pkt);
got_packet = (ret == 0);
if (ret == AVERROR_EOF || ret == AVERROR(EAGAIN))
ret = 0;
#else
ret = avcodec_encode_video2(enc->context, &av_pkt, enc->vframe,
&got_packet);
#endif
if (ret < 0) {
warn("nvenc_encode: Error encoding: %s", av_err2str(ret));
return false;
}
if (got_packet && av_pkt.size) {
if (enc->first_packet) {
uint8_t *new_packet;
size_t size;
enc->first_packet = false;
obs_extract_avc_headers(av_pkt.data, av_pkt.size,
&new_packet, &size,
&enc->header, &enc->header_size,
&enc->sei, &enc->sei_size);
da_copy_array(enc->buffer, new_packet, size);
bfree(new_packet);
} else {
da_copy_array(enc->buffer, av_pkt.data, av_pkt.size);
}
packet->pts = av_pkt.pts;
packet->dts = av_pkt.dts;
packet->data = enc->buffer.array;
packet->size = enc->buffer.num;
packet->type = OBS_ENCODER_VIDEO;
packet->keyframe = obs_avc_keyframe(packet->data, packet->size);
*received_packet = true;
} else {
*received_packet = false;
}
av_packet_unref(&av_pkt);
return true;
}
void nvenc_defaults(obs_data_t *settings)
{
obs_data_set_default_int(settings, "bitrate", 2500);
obs_data_set_default_int(settings, "max_bitrate", 5000);
obs_data_set_default_int(settings, "keyint_sec", 0);
obs_data_set_default_int(settings, "cqp", 20);
obs_data_set_default_string(settings, "rate_control", "CBR");
obs_data_set_default_string(settings, "preset", "hq");
obs_data_set_default_string(settings, "profile", "high");
obs_data_set_default_bool(settings, "psycho_aq", true);
obs_data_set_default_int(settings, "gpu", 0);
obs_data_set_default_int(settings, "bf", 2);
obs_data_set_default_bool(settings, "repeat_headers", false);
}
static bool rate_control_modified(obs_properties_t *ppts, obs_property_t *p,
obs_data_t *settings)
{
const char *rc = obs_data_get_string(settings, "rate_control");
bool cqp = astrcmpi(rc, "CQP") == 0;
bool vbr = astrcmpi(rc, "VBR") == 0;
bool lossless = astrcmpi(rc, "lossless") == 0;
size_t count;
p = obs_properties_get(ppts, "bitrate");
obs_property_set_visible(p, !cqp && !lossless);
p = obs_properties_get(ppts, "max_bitrate");
obs_property_set_visible(p, vbr);
p = obs_properties_get(ppts, "cqp");
obs_property_set_visible(p, cqp);
p = obs_properties_get(ppts, "preset");
count = obs_property_list_item_count(p);
for (size_t i = 0; i < count; i++) {
bool compatible = (i == 0 || i == 3);
obs_property_list_item_disable(p, i, lossless && !compatible);
}
return true;
}
obs_properties_t *nvenc_properties_internal(bool ffmpeg)
{
obs_properties_t *props = obs_properties_create();
obs_property_t *p;
p = obs_properties_add_list(props, "rate_control",
obs_module_text("RateControl"),
OBS_COMBO_TYPE_LIST,
OBS_COMBO_FORMAT_STRING);
obs_property_list_add_string(p, "CBR", "CBR");
obs_property_list_add_string(p, "CQP", "CQP");
obs_property_list_add_string(p, "VBR", "VBR");
obs_property_list_add_string(p, obs_module_text("Lossless"),
"lossless");
obs_property_set_modified_callback(p, rate_control_modified);
p = obs_properties_add_int(props, "bitrate", obs_module_text("Bitrate"),
50, 300000, 50);
obs_property_int_set_suffix(p, " Kbps");
p = obs_properties_add_int(props, "max_bitrate",
obs_module_text("MaxBitrate"), 50, 300000,
50);
obs_property_int_set_suffix(p, " Kbps");
obs_properties_add_int(props, "cqp", obs_module_text("NVENC.CQLevel"),
1, 30, 1);
obs_properties_add_int(props, "keyint_sec",
obs_module_text("KeyframeIntervalSec"), 0, 10,
1);
p = obs_properties_add_list(props, "preset", obs_module_text("Preset"),
OBS_COMBO_TYPE_LIST,
OBS_COMBO_FORMAT_STRING);
#define add_preset(val) \
obs_property_list_add_string(p, obs_module_text("NVENC.Preset." val), \
val)
add_preset("mq");
add_preset("hq");
add_preset("default");
add_preset("hp");
add_preset("ll");
add_preset("llhq");
add_preset("llhp");
#undef add_preset
p = obs_properties_add_list(props, "profile",
obs_module_text("Profile"),
OBS_COMBO_TYPE_LIST,
OBS_COMBO_FORMAT_STRING);
#define add_profile(val) obs_property_list_add_string(p, val, val)
add_profile("high");
add_profile("main");
add_profile("baseline");
#undef add_profile
if (!ffmpeg) {
p = obs_properties_add_bool(props, "lookahead",
obs_module_text("NVENC.LookAhead"));
obs_property_set_long_description(
p, obs_module_text("NVENC.LookAhead.ToolTip"));
p = obs_properties_add_bool(
props, "psycho_aq",
obs_module_text("NVENC.PsychoVisualTuning"));
obs_property_set_long_description(
p, obs_module_text("NVENC.PsychoVisualTuning.ToolTip"));
p = obs_properties_add_bool(props, "repeat_headers",
"repeat_headers");
obs_property_set_visible(p, false);
}
obs_properties_add_int(props, "gpu", obs_module_text("GPU"), 0, 8, 1);
obs_properties_add_int(props, "bf", obs_module_text("BFrames"), 0, 4,
1);
return props;
}
obs_properties_t *nvenc_properties(void *unused)
{
UNUSED_PARAMETER(unused);
return nvenc_properties_internal(false);
}
obs_properties_t *nvenc_properties_ffmpeg(void *unused)
{
UNUSED_PARAMETER(unused);
return nvenc_properties_internal(true);
}
static bool nvenc_extra_data(void *data, uint8_t **extra_data, size_t *size)
{
struct nvenc_encoder *enc = data;
*extra_data = enc->header;
*size = enc->header_size;
return true;
}
static bool nvenc_sei_data(void *data, uint8_t **extra_data, size_t *size)
{
struct nvenc_encoder *enc = data;
*extra_data = enc->sei;
*size = enc->sei_size;
return true;
}
struct obs_encoder_info nvenc_encoder_info = {
.id = "ffmpeg_nvenc",
.type = OBS_ENCODER_VIDEO,
.codec = "h264",
.get_name = nvenc_getname,
.create = nvenc_create,
.destroy = nvenc_destroy,
.encode = nvenc_encode,
.update = nvenc_reconfigure,
.get_defaults = nvenc_defaults,
.get_properties = nvenc_properties_ffmpeg,
.get_extra_data = nvenc_extra_data,
.get_sei_data = nvenc_sei_data,
.get_video_info = nvenc_video_info,
#ifdef _WIN32
.caps = OBS_ENCODER_CAP_DYN_BITRATE | OBS_ENCODER_CAP_INTERNAL,
#else
.caps = OBS_ENCODER_CAP_DYN_BITRATE,
#endif
};