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FFmpeg/libavcodec/qsvenc_hevc.c
Linjie Fu c2d000ec27 lavc/qsvenc_hevc: add qmax/qmin support for HEVC encoding 
Add qmax/qmin support for HEVC software bitrate control(SWBRC).

Limitations:
    - RateControlMethod != MFX_RATECONTROL_CQP
    - with EXTBRC ON

Signed-off-by: Dmitry Rogozhkin <dmitry.v.rogozhkin@intel.com>
Signed-off-by: Linjie Fu <linjie.fu@intel.com>
Signed-off-by: Zhong Li <zhongli_dev@126.com>
2020-07-05 23:43:45 +08:00

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/*
* Intel MediaSDK QSV based HEVC encoder
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdint.h>
#include <sys/types.h>
#include <mfx/mfxvideo.h>
#include "libavutil/common.h"
#include "libavutil/opt.h"
#include "avcodec.h"
#include "bytestream.h"
#include "get_bits.h"
#include "hevc.h"
#include "hevcdec.h"
#include "h2645_parse.h"
#include "internal.h"
#include "qsv.h"
#include "qsv_internal.h"
#include "qsvenc.h"
enum LoadPlugin {
LOAD_PLUGIN_NONE,
LOAD_PLUGIN_HEVC_SW,
LOAD_PLUGIN_HEVC_HW,
};
typedef struct QSVHEVCEncContext {
AVClass *class;
QSVEncContext qsv;
int load_plugin;
} QSVHEVCEncContext;
static int generate_fake_vps(QSVEncContext *q, AVCodecContext *avctx)
{
GetByteContext gbc;
PutByteContext pbc;
GetBitContext gb;
H2645RBSP sps_rbsp = { NULL };
H2645NAL sps_nal = { NULL };
HEVCSPS sps = { 0 };
HEVCVPS vps = { 0 };
uint8_t vps_buf[128], vps_rbsp_buf[128];
uint8_t *new_extradata;
unsigned int sps_id;
int ret, i, type, vps_size;
if (!avctx->extradata_size) {
av_log(avctx, AV_LOG_ERROR, "No extradata returned from libmfx\n");
return AVERROR_UNKNOWN;
}
av_fast_padded_malloc(&sps_rbsp.rbsp_buffer, &sps_rbsp.rbsp_buffer_alloc_size, avctx->extradata_size);
if (!sps_rbsp.rbsp_buffer)
return AVERROR(ENOMEM);
/* parse the SPS */
ret = ff_h2645_extract_rbsp(avctx->extradata + 4, avctx->extradata_size - 4, &sps_rbsp, &sps_nal, 1);
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR, "Error unescaping the SPS buffer\n");
return ret;
}
ret = init_get_bits8(&gb, sps_nal.data, sps_nal.size);
if (ret < 0) {
av_freep(&sps_rbsp.rbsp_buffer);
return ret;
}
get_bits(&gb, 1);
type = get_bits(&gb, 6);
if (type != HEVC_NAL_SPS) {
av_log(avctx, AV_LOG_ERROR, "Unexpected NAL type in the extradata: %d\n",
type);
av_freep(&sps_rbsp.rbsp_buffer);
return AVERROR_INVALIDDATA;
}
get_bits(&gb, 9);
ret = ff_hevc_parse_sps(&sps, &gb, &sps_id, 0, NULL, avctx);
av_freep(&sps_rbsp.rbsp_buffer);
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR, "Error parsing the SPS\n");
return ret;
}
/* generate the VPS */
vps.vps_max_layers = 1;
vps.vps_max_sub_layers = sps.max_sub_layers;
vps.vps_temporal_id_nesting_flag = sps.temporal_id_nesting_flag;
memcpy(&vps.ptl, &sps.ptl, sizeof(vps.ptl));
vps.vps_sub_layer_ordering_info_present_flag = 1;
for (i = 0; i < HEVC_MAX_SUB_LAYERS; i++) {
vps.vps_max_dec_pic_buffering[i] = sps.temporal_layer[i].max_dec_pic_buffering;
vps.vps_num_reorder_pics[i] = sps.temporal_layer[i].num_reorder_pics;
vps.vps_max_latency_increase[i] = sps.temporal_layer[i].max_latency_increase;
}
vps.vps_num_layer_sets = 1;
vps.vps_timing_info_present_flag = sps.vui.vui_timing_info_present_flag;
vps.vps_num_units_in_tick = sps.vui.vui_num_units_in_tick;
vps.vps_time_scale = sps.vui.vui_time_scale;
vps.vps_poc_proportional_to_timing_flag = sps.vui.vui_poc_proportional_to_timing_flag;
vps.vps_num_ticks_poc_diff_one = sps.vui.vui_num_ticks_poc_diff_one_minus1 + 1;
vps.vps_num_hrd_parameters = 0;
/* generate the encoded RBSP form of the VPS */
ret = ff_hevc_encode_nal_vps(&vps, sps.vps_id, vps_rbsp_buf, sizeof(vps_rbsp_buf));
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR, "Error writing the VPS\n");
return ret;
}
/* escape and add the startcode */
bytestream2_init(&gbc, vps_rbsp_buf, ret);
bytestream2_init_writer(&pbc, vps_buf, sizeof(vps_buf));
bytestream2_put_be32(&pbc, 1); // startcode
bytestream2_put_byte(&pbc, HEVC_NAL_VPS << 1); // NAL
bytestream2_put_byte(&pbc, 1); // header
while (bytestream2_get_bytes_left(&gbc)) {
if (bytestream2_get_bytes_left(&gbc) >= 3 && bytestream2_peek_be24(&gbc) <= 3) {
bytestream2_put_be24(&pbc, 3);
bytestream2_skip(&gbc, 2);
} else
bytestream2_put_byte(&pbc, bytestream2_get_byte(&gbc));
}
vps_size = bytestream2_tell_p(&pbc);
new_extradata = av_mallocz(vps_size + avctx->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
if (!new_extradata)
return AVERROR(ENOMEM);
memcpy(new_extradata, vps_buf, vps_size);
memcpy(new_extradata + vps_size, avctx->extradata, avctx->extradata_size);
av_freep(&avctx->extradata);
avctx->extradata = new_extradata;
avctx->extradata_size += vps_size;
return 0;
}
static av_cold int qsv_enc_init(AVCodecContext *avctx)
{
QSVHEVCEncContext *q = avctx->priv_data;
int ret;
if (q->load_plugin != LOAD_PLUGIN_NONE) {
static const char * const uid_hevcenc_sw = "2fca99749fdb49aeb121a5b63ef568f7";
static const char * const uid_hevcenc_hw = "6fadc791a0c2eb479ab6dcd5ea9da347";
if (q->qsv.load_plugins[0]) {
av_log(avctx, AV_LOG_WARNING,
"load_plugins is not empty, but load_plugin is not set to 'none'."
"The load_plugin value will be ignored.\n");
} else {
av_freep(&q->qsv.load_plugins);
if (q->load_plugin == LOAD_PLUGIN_HEVC_SW)
q->qsv.load_plugins = av_strdup(uid_hevcenc_sw);
else
q->qsv.load_plugins = av_strdup(uid_hevcenc_hw);
if (!q->qsv.load_plugins)
return AVERROR(ENOMEM);
}
}
// HEVC and H264 meaning of the value is shifted by 1, make it consistent
q->qsv.idr_interval++;
ret = ff_qsv_enc_init(avctx, &q->qsv);
if (ret < 0)
return ret;
if (!q->qsv.hevc_vps) {
ret = generate_fake_vps(&q->qsv, avctx);
if (ret < 0) {
ff_qsv_enc_close(avctx, &q->qsv);
return ret;
}
}
return 0;
}
static int qsv_enc_frame(AVCodecContext *avctx, AVPacket *pkt,
const AVFrame *frame, int *got_packet)
{
QSVHEVCEncContext *q = avctx->priv_data;
return ff_qsv_encode(avctx, &q->qsv, pkt, frame, got_packet);
}
static av_cold int qsv_enc_close(AVCodecContext *avctx)
{
QSVHEVCEncContext *q = avctx->priv_data;
return ff_qsv_enc_close(avctx, &q->qsv);
}
#define OFFSET(x) offsetof(QSVHEVCEncContext, x)
#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
static const AVOption options[] = {
QSV_COMMON_OPTS
{ "idr_interval", "Distance (in I-frames) between IDR frames", OFFSET(qsv.idr_interval), AV_OPT_TYPE_INT, { .i64 = 0 }, -1, INT_MAX, VE, "idr_interval" },
{ "begin_only", "Output an IDR-frame only at the beginning of the stream", 0, AV_OPT_TYPE_CONST, { .i64 = -1 }, 0, 0, VE, "idr_interval" },
{ "load_plugin", "A user plugin to load in an internal session", OFFSET(load_plugin), AV_OPT_TYPE_INT, { .i64 = LOAD_PLUGIN_HEVC_HW }, LOAD_PLUGIN_NONE, LOAD_PLUGIN_HEVC_HW, VE, "load_plugin" },
{ "none", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = LOAD_PLUGIN_NONE }, 0, 0, VE, "load_plugin" },
{ "hevc_sw", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = LOAD_PLUGIN_HEVC_SW }, 0, 0, VE, "load_plugin" },
{ "hevc_hw", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = LOAD_PLUGIN_HEVC_HW }, 0, 0, VE, "load_plugin" },
{ "load_plugins", "A :-separate list of hexadecimal plugin UIDs to load in an internal session",
OFFSET(qsv.load_plugins), AV_OPT_TYPE_STRING, { .str = "" }, 0, 0, VE },
{ "profile", NULL, OFFSET(qsv.profile), AV_OPT_TYPE_INT, { .i64 = MFX_PROFILE_UNKNOWN }, 0, INT_MAX, VE, "profile" },
{ "unknown", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_PROFILE_UNKNOWN }, INT_MIN, INT_MAX, VE, "profile" },
{ "main", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_PROFILE_HEVC_MAIN }, INT_MIN, INT_MAX, VE, "profile" },
{ "main10", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_PROFILE_HEVC_MAIN10 }, INT_MIN, INT_MAX, VE, "profile" },
{ "mainsp", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_PROFILE_HEVC_MAINSP }, INT_MIN, INT_MAX, VE, "profile" },
{ "rext", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = MFX_PROFILE_HEVC_REXT }, INT_MIN, INT_MAX, VE, "profile" },
{ "gpb", "1: GPB (generalized P/B frame); 0: regular P frame", OFFSET(qsv.gpb), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, VE},
{ "tile_cols", "Number of columns for tiled encoding", OFFSET(qsv.tile_cols), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, UINT16_MAX, VE },
{ "tile_rows", "Number of rows for tiled encoding", OFFSET(qsv.tile_rows), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, UINT16_MAX, VE },
{ NULL },
};
static const AVClass class = {
.class_name = "hevc_qsv encoder",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
static const AVCodecDefault qsv_enc_defaults[] = {
{ "b", "1M" },
{ "refs", "0" },
// same as the x264 default
{ "g", "248" },
{ "bf", "8" },
{ "qmin", "-1" },
{ "qmax", "-1" },
{ "trellis", "-1" },
{ "flags", "+cgop" },
#if FF_API_PRIVATE_OPT
{ "b_strategy", "-1" },
#endif
{ NULL },
};
AVCodec ff_hevc_qsv_encoder = {
.name = "hevc_qsv",
.long_name = NULL_IF_CONFIG_SMALL("HEVC (Intel Quick Sync Video acceleration)"),
.priv_data_size = sizeof(QSVHEVCEncContext),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_HEVC,
.init = qsv_enc_init,
.encode2 = qsv_enc_frame,
.close = qsv_enc_close,
.capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_HYBRID,
.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_NV12,
AV_PIX_FMT_P010,
AV_PIX_FMT_QSV,
AV_PIX_FMT_NONE },
.priv_class = &class,
.defaults = qsv_enc_defaults,
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
.wrapper_name = "qsv",
.hw_configs = ff_qsv_enc_hw_configs,
};
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