ref: 56735c3fdb8401fb052f69cdaf2ebf16714bd21d
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"
// 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::impl {
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) {
vpx_free(cpi->common.buffer_pool);
vp9_remove_compressor(cpi);
}
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->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;
}
SimpleEncode::SimpleEncode(int frame_width, int frame_height,
int frame_rate_num, int frame_rate_den,
int target_bitrate, int num_frames, FILE *file)
: pimpl{ std::unique_ptr<impl>(new impl()) } {
this->frame_width = frame_width;
this->frame_height = frame_height;
this->frame_rate_num = frame_rate_num;
this->frame_rate_den = frame_rate_den;
this->target_bitrate = target_bitrate;
this->num_frames = num_frames;
this->file = file;
pimpl->cpi = NULL;
pimpl->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, pimpl->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, pimpl->img_fmt, frame_width, frame_height, 1);
rewind(file);
pimpl->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; // Make 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);
}
pimpl->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
pimpl->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 < pimpl->first_pass_stats.size() - 1; ++i) {
double *buf_start = reinterpret_cast<double *>(&pimpl->first_pass_stats[i]);
// We use - 1 here because the last member in FIRSTPASS_STATS is not double
double *buf_end =
buf_start + sizeof(pimpl->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(pimpl->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 = pimpl->first_pass_stats.data();
stats.sz =
sizeof(pimpl->first_pass_stats[0]) * pimpl->first_pass_stats.size();
vp9_set_first_pass_stats(&oxcf, &stats);
assert(pimpl->cpi == NULL);
pimpl->cpi = init_encoder(&oxcf, pimpl->img_fmt);
vpx_img_alloc(&pimpl->tmp_img, pimpl->img_fmt, frame_width, frame_height, 1);
rewind(file);
}
void SimpleEncode::EndEncode() {
free_encoder(pimpl->cpi);
pimpl->cpi = nullptr;
vpx_img_free(&pimpl->tmp_img);
rewind(file);
}
void SimpleEncode::EncodeFrame(EncodeFrameResult *encode_frame_result) {
VP9_COMP *cpi = pimpl->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(&pimpl->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(&pimpl->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_size = frame_width * frame_height * 3;
encode_frame_result->coding_data =
std::move(std::unique_ptr<uint8_t[]>(new uint8_t[max_coding_data_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_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_size > 0);
assert(encode_frame_result->coding_data_size < max_coding_data_size);
update_encode_frame_result(encode_frame_result, &encode_frame_info);
}
int SimpleEncode::GetCodingFrameNum() {
assert(pimpl->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, pimpl->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() {}