#include "mux.h"
#include "timebase.h"
#include "x264_encoder.h"
+#include "x264_speed_control.h"
extern "C" {
#include <libavformat/avformat.h>
using namespace std;
-X264Encoder::X264Encoder(Mux *mux)
- : mux(mux)
+X264Encoder::X264Encoder(AVOutputFormat *oformat)
+ : wants_global_headers(oformat->flags & AVFMT_GLOBALHEADER)
{
frame_pool.reset(new uint8_t[WIDTH * HEIGHT * 2 * X264_QUEUE_LENGTH]);
for (unsigned i = 0; i < X264_QUEUE_LENGTH; ++i) {
param.i_timebase_num = 1;
param.i_timebase_den = TIMEBASE;
param.i_keyint_max = 50; // About one second.
+ if (global_flags.x264_speedcontrol) {
+ param.i_frame_reference = 16; // Because speedcontrol is never allowed to change this above what we set at start.
+ }
// NOTE: These should be in sync with the ones in h264encode.cpp (sbs_rbsp()).
param.vui.i_vidformat = 5; // Unspecified.
param.vui.i_transfer = 2; // Unspecified (since we use sRGB).
param.vui.i_colmatrix = 6; // BT.601/SMPTE 170M.
- // 4.5 Mbit/sec, CBR.
+
param.rc.i_rc_method = X264_RC_ABR;
- param.rc.i_bitrate = 4500;
+ param.rc.i_bitrate = global_flags.x264_bitrate;
+ if (global_flags.x264_vbv_buffer_size < 0) {
+ param.rc.i_vbv_buffer_size = param.rc.i_bitrate; // One-second VBV.
+ } else {
+ param.rc.i_vbv_buffer_size = global_flags.x264_vbv_buffer_size;
+ }
+ if (global_flags.x264_vbv_max_bitrate < 0) {
+ param.rc.i_vbv_max_bitrate = param.rc.i_bitrate; // CBR.
+ } else {
+ param.rc.i_vbv_max_bitrate = global_flags.x264_vbv_max_bitrate;
+ }
- // One-second VBV.
- param.rc.i_vbv_max_bitrate = 4500;
- param.rc.i_vbv_buffer_size = 4500;
+ // Occasionally players have problem with extremely low quantizers;
+ // be on the safe side. Shouldn't affect quality in any meaningful way.
+ param.rc.i_qp_min = 5;
// TODO: more flags here, via x264_param_parse().
x264_param_apply_profile(¶m, "high");
+ param.b_repeat_headers = !wants_global_headers;
+
x264 = x264_encoder_open(¶m);
if (x264 == nullptr) {
fprintf(stderr, "ERROR: x264 initialization failed.\n");
exit(1);
}
+
+ if (global_flags.x264_speedcontrol) {
+ speed_control.reset(new X264SpeedControl(x264, /*f_speed=*/1.0f, X264_QUEUE_LENGTH, /*f_buffer_init=*/1.0f));
+ }
+
+ if (wants_global_headers) {
+ x264_nal_t *nal;
+ int num_nal;
+
+ x264_encoder_headers(x264, &nal, &num_nal);
+
+ for (int i = 0; i < num_nal; ++i) {
+ if (nal[i].i_type == NAL_SEI) {
+ // Don't put the SEI in extradata; make it part of the first frame instead.
+ buffered_sei += string((const char *)nal[i].p_payload, nal[i].i_payload);
+ } else {
+ global_headers += string((const char *)nal[i].p_payload, nal[i].i_payload);
+ }
+ }
+ }
}
void X264Encoder::encoder_thread_func()
pic.img.i_stride[1] = WIDTH / 2 * sizeof(uint16_t);
pic.opaque = reinterpret_cast<void *>(intptr_t(qf.duration));
+ if (speed_control) {
+ speed_control->before_frame(float(free_frames.size()) / X264_QUEUE_LENGTH, X264_QUEUE_LENGTH, 1e6 * qf.duration / TIMEBASE);
+ }
x264_encoder_encode(x264, &nal, &num_nal, &pic, &pic);
+ if (speed_control) {
+ speed_control->after_frame();
+ }
} else {
+ if (speed_control) {
+ speed_control->before_frame(float(free_frames.size()) / X264_QUEUE_LENGTH, X264_QUEUE_LENGTH, 1e6 * qf.duration / TIMEBASE);
+ }
x264_encoder_encode(x264, &nal, &num_nal, nullptr, &pic);
+ if (speed_control) {
+ speed_control->after_frame();
+ }
}
// We really need one AVPacket for the entire frame, it seems,
// so combine it all.
- size_t num_bytes = 0;
+ size_t num_bytes = buffered_sei.size();
for (int i = 0; i < num_nal; ++i) {
num_bytes += nal[i].i_payload;
}
unique_ptr<uint8_t[]> data(new uint8_t[num_bytes]);
uint8_t *ptr = data.get();
+ if (!buffered_sei.empty()) {
+ memcpy(ptr, buffered_sei.data(), buffered_sei.size());
+ ptr += buffered_sei.size();
+ buffered_sei.clear();
+ }
for (int i = 0; i < num_nal; ++i) {
memcpy(ptr, nal[i].p_payload, nal[i].i_payload);
ptr += nal[i].i_payload;