ref: 757a5e6aa926cd5ee0ad6e7424cfd2968d0a03a4
dir: /vp9/simple_encode.cc/
#include <vector>
#include "vp9/common/vp9_onyxc_int.h"
#include "vp9/vp9_iface_common.h"
#include "vp9/encoder/vp9_encoder.h"
#include "vp9/encoder/vp9_firstpass.h"
#include "vp9/simple_encode.h"
#include "vp9/vp9_cx_iface.h"
namespace vp9 {
// TODO(angiebird): Merge this function with vpx_img_plane_width()
static int img_plane_width(const vpx_image_t *img, int plane) {
if (plane > 0 && img->x_chroma_shift > 0)
return (img->d_w + 1) >> img->x_chroma_shift;
else
return img->d_w;
}
// TODO(angiebird): Merge this function with vpx_img_plane_height()
static int img_plane_height(const vpx_image_t *img, int plane) {
if (plane > 0 && img->y_chroma_shift > 0)
return (img->d_h + 1) >> img->y_chroma_shift;
else
return img->d_h;
}
// TODO(angiebird): Merge this function with vpx_img_read()
static int img_read(vpx_image_t *img, FILE *file) {
int plane;
for (plane = 0; plane < 3; ++plane) {
unsigned char *buf = img->planes[plane];
const int stride = img->stride[plane];
const int w = img_plane_width(img, plane) *
((img->fmt & VPX_IMG_FMT_HIGHBITDEPTH) ? 2 : 1);
const int h = img_plane_height(img, plane);
int y;
for (y = 0; y < h; ++y) {
if (fread(buf, 1, w, file) != (size_t)w) return 0;
buf += stride;
}
}
return 1;
}
class SimpleEncode::EncodeImpl {
public:
VP9_COMP *cpi;
vpx_img_fmt_t img_fmt;
vpx_image_t tmp_img;
std::vector<FIRSTPASS_STATS> first_pass_stats;
};
static VP9_COMP *init_encoder(const VP9EncoderConfig *oxcf,
vpx_img_fmt_t img_fmt) {
VP9_COMP *cpi;
BufferPool *buffer_pool = (BufferPool *)vpx_calloc(1, sizeof(*buffer_pool));
vp9_initialize_enc();
cpi = vp9_create_compressor(oxcf, buffer_pool);
vp9_update_compressor_with_img_fmt(cpi, img_fmt);
return cpi;
}
static void free_encoder(VP9_COMP *cpi) {
BufferPool *buffer_pool = cpi->common.buffer_pool;
vp9_remove_compressor(cpi);
// buffer_pool needs to be free after cpi because buffer_pool contains
// allocated buffers that will be free in vp9_remove_compressor()
vpx_free(buffer_pool);
}
static INLINE vpx_rational_t make_vpx_rational(int num, int den) {
vpx_rational_t v;
v.num = num;
v.den = den;
return v;
}
static INLINE FrameType
get_frame_type_from_update_type(FRAME_UPDATE_TYPE update_type) {
// TODO(angiebird): Figure out if we need frame type other than key frame,
// alternate reference and inter frame
switch (update_type) {
case KF_UPDATE: return kKeyFrame; break;
case ARF_UPDATE: return kAlternateReference; break;
default: return kInterFrame; break;
}
}
static void update_encode_frame_result(
EncodeFrameResult *encode_frame_result,
const ENCODE_FRAME_RESULT *encode_frame_info) {
encode_frame_result->coding_data_bit_size =
encode_frame_result->coding_data_byte_size * 8;
encode_frame_result->show_idx = encode_frame_info->show_idx;
encode_frame_result->frame_type =
get_frame_type_from_update_type(encode_frame_info->update_type);
encode_frame_result->psnr = encode_frame_info->psnr;
encode_frame_result->sse = encode_frame_info->sse;
encode_frame_result->quantize_index = encode_frame_info->quantize_index;
}
static void IncreaseGroupOfPictureIndex(GroupOfPicture *group_of_picture) {
++group_of_picture->encode_frame_index;
}
static int IsGroupOfPictureFinished(const GroupOfPicture &group_of_picture) {
return static_cast<size_t>(group_of_picture.encode_frame_index) ==
group_of_picture.encode_frame_list.size();
}
static void SetGroupOfPicture(GroupOfPicture *group_of_picture,
int first_is_key_frame, int use_alt_ref,
int coding_frame_count, int first_show_idx) {
// Clean up the state of previous group of picture.
group_of_picture->encode_frame_list.clear();
group_of_picture->encode_frame_index = 0;
{
// First frame in the group of pictures. It's either key frame or show inter
// frame.
EncodeFrameInfo encode_frame_info;
if (first_is_key_frame) {
encode_frame_info.frame_type = kKeyFrame;
} else {
encode_frame_info.frame_type = kInterFrame;
}
encode_frame_info.show_idx = first_show_idx;
group_of_picture->encode_frame_list.push_back(encode_frame_info);
}
const int show_frame_count = coding_frame_count - use_alt_ref;
if (use_alt_ref) {
// If there is alternate reference, it is always coded at the second place.
// Its show index (or timestamp) is at the last of this group
EncodeFrameInfo encode_frame_info;
encode_frame_info.frame_type = kAlternateReference;
encode_frame_info.show_idx = first_show_idx + show_frame_count;
group_of_picture->encode_frame_list.push_back(encode_frame_info);
}
// Encode the rest show inter frames.
for (int i = 1; i < show_frame_count; ++i) {
EncodeFrameInfo encode_frame_info;
encode_frame_info.frame_type = kInterFrame;
encode_frame_info.show_idx = first_show_idx + i;
group_of_picture->encode_frame_list.push_back(encode_frame_info);
}
}
static void UpdateGroupOfPicture(GroupOfPicture *group_of_picture,
const VP9_COMP *cpi) {
int first_is_key_frame;
int use_alt_ref;
int coding_frame_count;
int first_show_idx;
vp9_get_next_group_of_picture(&first_is_key_frame, &use_alt_ref,
&coding_frame_count, &first_show_idx, cpi);
SetGroupOfPicture(group_of_picture, first_is_key_frame, use_alt_ref,
coding_frame_count, first_show_idx);
}
SimpleEncode::SimpleEncode(int frame_width, int frame_height,
int frame_rate_num, int frame_rate_den,
int target_bitrate, int num_frames,
const char *infile_path) {
impl_ptr_ = std::unique_ptr<EncodeImpl>(new EncodeImpl());
frame_width_ = frame_width;
frame_height_ = frame_height;
frame_rate_num_ = frame_rate_num;
frame_rate_den_ = frame_rate_den;
target_bitrate_ = target_bitrate;
num_frames_ = num_frames;
// TODO(angirbid): Should we keep a file pointer here or keep the file_path?
file_ = fopen(infile_path, "r");
impl_ptr_->cpi = NULL;
impl_ptr_->img_fmt = VPX_IMG_FMT_I420;
}
void SimpleEncode::ComputeFirstPassStats() {
vpx_rational_t frame_rate =
make_vpx_rational(frame_rate_num_, frame_rate_den_);
const VP9EncoderConfig oxcf =
vp9_get_encoder_config(frame_width_, frame_height_, frame_rate,
target_bitrate_, VPX_RC_FIRST_PASS);
VP9_COMP *cpi = init_encoder(&oxcf, impl_ptr_->img_fmt);
struct lookahead_ctx *lookahead = cpi->lookahead;
int i;
int use_highbitdepth = 0;
#if CONFIG_VP9_HIGHBITDEPTH
use_highbitdepth = cpi->common.use_highbitdepth;
#endif
vpx_image_t img;
vpx_img_alloc(&img, impl_ptr_->img_fmt, frame_width_, frame_height_, 1);
rewind(file_);
impl_ptr_->first_pass_stats.clear();
for (i = 0; i < num_frames_; ++i) {
assert(!vp9_lookahead_full(lookahead));
if (img_read(&img, file_)) {
int next_show_idx = vp9_lookahead_next_show_idx(lookahead);
int64_t ts_start =
timebase_units_to_ticks(&oxcf.g_timebase_in_ts, next_show_idx);
int64_t ts_end =
timebase_units_to_ticks(&oxcf.g_timebase_in_ts, next_show_idx + 1);
YV12_BUFFER_CONFIG sd;
image2yuvconfig(&img, &sd);
vp9_lookahead_push(lookahead, &sd, ts_start, ts_end, use_highbitdepth, 0);
{
int64_t time_stamp;
int64_t time_end;
int flush = 1; // Makes vp9_get_compressed_data process a frame
size_t size;
unsigned int frame_flags = 0;
ENCODE_FRAME_RESULT encode_frame_info;
// TODO(angiebird): Call vp9_first_pass directly
vp9_get_compressed_data(cpi, &frame_flags, &size, NULL, &time_stamp,
&time_end, flush, &encode_frame_info);
// vp9_get_compressed_data only generates first pass stats not
// compresses data
assert(size == 0);
}
impl_ptr_->first_pass_stats.push_back(vp9_get_frame_stats(&cpi->twopass));
}
}
vp9_end_first_pass(cpi);
// TODO(angiebird): Store the total_stats apart form first_pass_stats
impl_ptr_->first_pass_stats.push_back(vp9_get_total_stats(&cpi->twopass));
free_encoder(cpi);
rewind(file_);
vpx_img_free(&img);
}
std::vector<std::vector<double>> SimpleEncode::ObserveFirstPassStats() {
std::vector<std::vector<double>> output_stats;
// TODO(angiebird): This function make several assumptions of
// FIRSTPASS_STATS. 1) All elements in FIRSTPASS_STATS are double except the
// last one. 2) The last entry of first_pass_stats is the total_stats.
// Change the code structure, so that we don't have to make these assumptions
// Note the last entry of first_pass_stats is the total_stats, we don't need
// it.
for (size_t i = 0; i < impl_ptr_->first_pass_stats.size() - 1; ++i) {
double *buf_start =
reinterpret_cast<double *>(&impl_ptr_->first_pass_stats[i]);
// We use - 1 here because the last member in FIRSTPASS_STATS is not double
double *buf_end =
buf_start + sizeof(impl_ptr_->first_pass_stats[i]) / sizeof(*buf_end) -
1;
std::vector<double> this_stats(buf_start, buf_end);
output_stats.push_back(this_stats);
}
return output_stats;
}
void SimpleEncode::StartEncode() {
assert(impl_ptr_->first_pass_stats.size() > 0);
vpx_rational_t frame_rate =
make_vpx_rational(frame_rate_num_, frame_rate_den_);
VP9EncoderConfig oxcf =
vp9_get_encoder_config(frame_width_, frame_height_, frame_rate,
target_bitrate_, VPX_RC_LAST_PASS);
vpx_fixed_buf_t stats;
stats.buf = impl_ptr_->first_pass_stats.data();
stats.sz = sizeof(impl_ptr_->first_pass_stats[0]) *
impl_ptr_->first_pass_stats.size();
vp9_set_first_pass_stats(&oxcf, &stats);
assert(impl_ptr_->cpi == NULL);
impl_ptr_->cpi = init_encoder(&oxcf, impl_ptr_->img_fmt);
vpx_img_alloc(&impl_ptr_->tmp_img, impl_ptr_->img_fmt, frame_width_,
frame_height_, 1);
UpdateGroupOfPicture(&group_of_picture_, impl_ptr_->cpi);
rewind(file_);
}
void SimpleEncode::EndEncode() {
free_encoder(impl_ptr_->cpi);
impl_ptr_->cpi = nullptr;
vpx_img_free(&impl_ptr_->tmp_img);
rewind(file_);
}
int SimpleEncode::GetKeyFrameGroupSize(int key_frame_index) const {
const VP9_COMP *cpi = impl_ptr_->cpi;
return vp9_get_frames_to_next_key(&cpi->oxcf, &cpi->frame_info,
&cpi->twopass.first_pass_info,
key_frame_index, cpi->rc.min_gf_interval);
}
GroupOfPicture SimpleEncode::ObserveGroupOfPicture() const {
return group_of_picture_;
}
EncodeFrameInfo SimpleEncode::GetNextEncodeFrameInfo() const {
return group_of_picture_
.encode_frame_list[group_of_picture_.encode_frame_index];
}
void SimpleEncode::EncodeFrame(EncodeFrameResult *encode_frame_result) {
VP9_COMP *cpi = impl_ptr_->cpi;
struct lookahead_ctx *lookahead = cpi->lookahead;
int use_highbitdepth = 0;
#if CONFIG_VP9_HIGHBITDEPTH
use_highbitdepth = cpi->common.use_highbitdepth;
#endif
// The lookahead's size is set to oxcf->lag_in_frames.
// We want to fill lookahead to it's max capacity if possible so that the
// encoder can construct alt ref frame in time.
// In the other words, we hope vp9_get_compressed_data to encode a frame
// every time in the function
while (!vp9_lookahead_full(lookahead)) {
// TODO(angiebird): Check whether we can move this file read logics to
// lookahead
if (img_read(&impl_ptr_->tmp_img, file_)) {
int next_show_idx = vp9_lookahead_next_show_idx(lookahead);
int64_t ts_start =
timebase_units_to_ticks(&cpi->oxcf.g_timebase_in_ts, next_show_idx);
int64_t ts_end = timebase_units_to_ticks(&cpi->oxcf.g_timebase_in_ts,
next_show_idx + 1);
YV12_BUFFER_CONFIG sd;
image2yuvconfig(&impl_ptr_->tmp_img, &sd);
vp9_lookahead_push(lookahead, &sd, ts_start, ts_end, use_highbitdepth, 0);
} else {
break;
}
}
assert(encode_frame_result->coding_data.get() == nullptr);
const size_t max_coding_data_byte_size = frame_width_ * frame_height_ * 3;
encode_frame_result->coding_data = std::move(
std::unique_ptr<uint8_t[]>(new uint8_t[max_coding_data_byte_size]));
int64_t time_stamp;
int64_t time_end;
int flush = 1; // Make vp9_get_compressed_data encode a frame
unsigned int frame_flags = 0;
ENCODE_FRAME_RESULT encode_frame_info;
vp9_get_compressed_data(cpi, &frame_flags,
&encode_frame_result->coding_data_byte_size,
encode_frame_result->coding_data.get(), &time_stamp,
&time_end, flush, &encode_frame_info);
// vp9_get_compressed_data is expected to encode a frame every time, so the
// data size should be greater than zero.
assert(encode_frame_result->coding_data_byte_size > 0);
assert(encode_frame_result->coding_data_byte_size <
max_coding_data_byte_size);
update_encode_frame_result(encode_frame_result, &encode_frame_info);
IncreaseGroupOfPictureIndex(&group_of_picture_);
if (IsGroupOfPictureFinished(group_of_picture_)) {
UpdateGroupOfPicture(&group_of_picture_, impl_ptr_->cpi);
}
}
void SimpleEncode::EncodeFrameWithQuantizeIndex(
EncodeFrameResult *encode_frame_result, int quantize_index) {
encode_command_set_external_quantize_index(&impl_ptr_->cpi->encode_command,
quantize_index);
EncodeFrame(encode_frame_result);
encode_command_reset_external_quantize_index(&impl_ptr_->cpi->encode_command);
}
int SimpleEncode::GetCodingFrameNum() const {
assert(impl_ptr_->first_pass_stats.size() - 1 > 0);
// These are the default settings for now.
const int multi_layer_arf = 0;
const int allow_alt_ref = 1;
vpx_rational_t frame_rate =
make_vpx_rational(frame_rate_num_, frame_rate_den_);
const VP9EncoderConfig oxcf =
vp9_get_encoder_config(frame_width_, frame_height_, frame_rate,
target_bitrate_, VPX_RC_LAST_PASS);
FRAME_INFO frame_info = vp9_get_frame_info(&oxcf);
FIRST_PASS_INFO first_pass_info;
fps_init_first_pass_info(&first_pass_info, impl_ptr_->first_pass_stats.data(),
num_frames_);
return vp9_get_coding_frame_num(&oxcf, &frame_info, &first_pass_info,
multi_layer_arf, allow_alt_ref);
}
SimpleEncode::~SimpleEncode() {
if (this->file_ != NULL) {
fclose(this->file_);
}
}
} // namespace vp9