448 lines
15 KiB
C
448 lines
15 KiB
C
/* SPDX-License-Identifier: GPL-3.0-or-later
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* Copyright © 2016-2018 The TokTok team.
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* Copyright © 2013-2015 Tox project.
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*/
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#include "video.h"
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#include <assert.h>
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#include <stdlib.h>
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#include <string.h>
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#include "msi.h"
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#include "ring_buffer.h"
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#include "rtp.h"
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#include "../toxcore/ccompat.h"
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#include "../toxcore/logger.h"
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#include "../toxcore/mono_time.h"
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#include "../toxcore/network.h"
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/**
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* Soft deadline the decoder should attempt to meet, in "us" (microseconds).
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* Set to zero for unlimited.
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*
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* By convention, the value 1 is used to mean "return as fast as possible."
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*/
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// TODO(zoff99): don't hardcode this, let the application choose it
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#define WANTED_MAX_DECODER_FPS 40
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/**
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* VPX_DL_REALTIME (1)
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* deadline parameter analogous to VPx REALTIME mode.
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*
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* VPX_DL_GOOD_QUALITY (1000000)
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* deadline parameter analogous to VPx GOOD QUALITY mode.
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*
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* VPX_DL_BEST_QUALITY (0)
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* deadline parameter analogous to VPx BEST QUALITY mode.
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*/
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#define MAX_DECODE_TIME_US (1000000 / WANTED_MAX_DECODER_FPS) // to allow x fps
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/**
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* Codec control function to set encoder internal speed settings. Changes in
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* this value influences, among others, the encoder's selection of motion
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* estimation methods. Values greater than 0 will increase encoder speed at the
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* expense of quality.
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*
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* Note Valid range for VP8: `-16..16`
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*/
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#define VP8E_SET_CPUUSED_VALUE 16
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/**
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* Initialize encoder with this value.
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*
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* Target bandwidth to use for this stream, in kilobits per second.
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*/
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#define VIDEO_BITRATE_INITIAL_VALUE 5000
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#define VIDEO_DECODE_BUFFER_SIZE 5 // this buffer has normally max. 1 entry
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static vpx_codec_iface_t *video_codec_decoder_interface(void)
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{
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return vpx_codec_vp8_dx();
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}
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static vpx_codec_iface_t *video_codec_encoder_interface(void)
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{
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return vpx_codec_vp8_cx();
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}
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#define VIDEO_CODEC_DECODER_MAX_WIDTH 800 // its a dummy value, because the struct needs a value there
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#define VIDEO_CODEC_DECODER_MAX_HEIGHT 600 // its a dummy value, because the struct needs a value there
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#define VPX_MAX_DIST_START 40
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#define VPX_MAX_ENCODER_THREADS 4
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#define VPX_MAX_DECODER_THREADS 4
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#define VIDEO_VP8_DECODER_POST_PROCESSING_ENABLED 0
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static void vc_init_encoder_cfg(const Logger *log, vpx_codec_enc_cfg_t *cfg, int16_t kf_max_dist)
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{
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const vpx_codec_err_t rc = vpx_codec_enc_config_default(video_codec_encoder_interface(), cfg, 0);
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if (rc != VPX_CODEC_OK) {
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LOGGER_ERROR(log, "vc_init_encoder_cfg:Failed to get config: %s", vpx_codec_err_to_string(rc));
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}
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/* Target bandwidth to use for this stream, in kilobits per second */
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cfg->rc_target_bitrate = VIDEO_BITRATE_INITIAL_VALUE;
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cfg->g_w = VIDEO_CODEC_DECODER_MAX_WIDTH;
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cfg->g_h = VIDEO_CODEC_DECODER_MAX_HEIGHT;
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cfg->g_pass = VPX_RC_ONE_PASS;
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cfg->g_error_resilient = VPX_ERROR_RESILIENT_DEFAULT | VPX_ERROR_RESILIENT_PARTITIONS;
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cfg->g_lag_in_frames = 0;
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/* Allow lagged encoding
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*
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* If set, this value allows the encoder to consume a number of input
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* frames before producing output frames. This allows the encoder to
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* base decisions for the current frame on future frames. This does
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* increase the latency of the encoding pipeline, so it is not appropriate
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* in all situations (ex: realtime encoding).
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*
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* Note that this is a maximum value -- the encoder may produce frames
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* sooner than the given limit. Set this value to 0 to disable this
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* feature.
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*/
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cfg->kf_min_dist = 0;
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cfg->kf_mode = VPX_KF_AUTO; // Encoder determines optimal placement automatically
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cfg->rc_end_usage = VPX_VBR; // what quality mode?
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/*
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* VPX_VBR Variable Bit Rate (VBR) mode
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* VPX_CBR Constant Bit Rate (CBR) mode
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* VPX_CQ Constrained Quality (CQ) mode -> give codec a hint that we may be on low bandwidth connection
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* VPX_Q Constant Quality (Q) mode
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*/
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if (kf_max_dist > 1) {
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cfg->kf_max_dist = kf_max_dist; // a full frame every x frames minimum (can be more often, codec decides automatically)
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LOGGER_DEBUG(log, "kf_max_dist=%d (1)", cfg->kf_max_dist);
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} else {
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cfg->kf_max_dist = VPX_MAX_DIST_START;
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LOGGER_DEBUG(log, "kf_max_dist=%d (2)", cfg->kf_max_dist);
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}
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cfg->g_threads = VPX_MAX_ENCODER_THREADS; // Maximum number of threads to use
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/* TODO: set these to something reasonable */
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// cfg->g_timebase.num = 1;
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// cfg->g_timebase.den = 60; // 60 fps
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cfg->rc_resize_allowed = 1; // allow encoder to resize to smaller resolution
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cfg->rc_resize_up_thresh = 40;
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cfg->rc_resize_down_thresh = 5;
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/* TODO: make quality setting an API call, but start with normal quality */
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#if 0
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/* Highest-resolution encoder settings */
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cfg->rc_dropframe_thresh = 0;
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cfg->rc_resize_allowed = 0;
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cfg->rc_min_quantizer = 2;
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cfg->rc_max_quantizer = 56;
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cfg->rc_undershoot_pct = 100;
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cfg->rc_overshoot_pct = 15;
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cfg->rc_buf_initial_sz = 500;
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cfg->rc_buf_optimal_sz = 600;
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cfg->rc_buf_sz = 1000;
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#endif /* 0 */
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}
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VCSession *vc_new(Mono_Time *mono_time, const Logger *log, ToxAV *av, uint32_t friend_number,
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toxav_video_receive_frame_cb *cb, void *cb_data)
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{
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VCSession *vc = (VCSession *)calloc(1, sizeof(VCSession));
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vpx_codec_err_t rc;
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if (vc == nullptr) {
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LOGGER_WARNING(log, "Allocation failed! Application might misbehave!");
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return nullptr;
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}
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if (create_recursive_mutex(vc->queue_mutex) != 0) {
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LOGGER_WARNING(log, "Failed to create recursive mutex!");
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free(vc);
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return nullptr;
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}
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const int cpu_used_value = VP8E_SET_CPUUSED_VALUE;
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vc->vbuf_raw = rb_new(VIDEO_DECODE_BUFFER_SIZE);
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if (vc->vbuf_raw == nullptr) {
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goto BASE_CLEANUP;
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}
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/*
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* VPX_CODEC_USE_FRAME_THREADING
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* Enable frame-based multi-threading
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*
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* VPX_CODEC_USE_ERROR_CONCEALMENT
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* Conceal errors in decoded frames
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*/
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vpx_codec_dec_cfg_t dec_cfg;
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dec_cfg.threads = VPX_MAX_DECODER_THREADS; // Maximum number of threads to use
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dec_cfg.w = VIDEO_CODEC_DECODER_MAX_WIDTH;
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dec_cfg.h = VIDEO_CODEC_DECODER_MAX_HEIGHT;
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LOGGER_DEBUG(log, "Using VP8 codec for decoder (0)");
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rc = vpx_codec_dec_init(vc->decoder, video_codec_decoder_interface(), &dec_cfg,
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VPX_CODEC_USE_FRAME_THREADING | VPX_CODEC_USE_POSTPROC);
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if (rc == VPX_CODEC_INCAPABLE) {
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LOGGER_WARNING(log, "Postproc not supported by this decoder (0)");
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rc = vpx_codec_dec_init(vc->decoder, video_codec_decoder_interface(), &dec_cfg, VPX_CODEC_USE_FRAME_THREADING);
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}
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if (rc != VPX_CODEC_OK) {
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LOGGER_ERROR(log, "Init video_decoder failed: %s", vpx_codec_err_to_string(rc));
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goto BASE_CLEANUP;
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}
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if (VIDEO_VP8_DECODER_POST_PROCESSING_ENABLED == 1) {
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vp8_postproc_cfg_t pp = {VP8_DEBLOCK, 1, 0};
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const vpx_codec_err_t cc_res = vpx_codec_control(vc->decoder, VP8_SET_POSTPROC, &pp);
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if (cc_res != VPX_CODEC_OK) {
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LOGGER_WARNING(log, "Failed to turn on postproc");
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} else {
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LOGGER_DEBUG(log, "turn on postproc: OK");
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}
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} else {
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vp8_postproc_cfg_t pp = {0, 0, 0};
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vpx_codec_err_t cc_res = vpx_codec_control(vc->decoder, VP8_SET_POSTPROC, &pp);
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if (cc_res != VPX_CODEC_OK) {
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LOGGER_WARNING(log, "Failed to turn OFF postproc");
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} else {
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LOGGER_DEBUG(log, "Disable postproc: OK");
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}
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}
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/* Set encoder to some initial values
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*/
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vpx_codec_enc_cfg_t cfg;
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vc_init_encoder_cfg(log, &cfg, 1);
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LOGGER_DEBUG(log, "Using VP8 codec for encoder (0.1)");
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rc = vpx_codec_enc_init(vc->encoder, video_codec_encoder_interface(), &cfg, VPX_CODEC_USE_FRAME_THREADING);
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if (rc != VPX_CODEC_OK) {
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LOGGER_ERROR(log, "Failed to initialize encoder: %s", vpx_codec_err_to_string(rc));
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goto BASE_CLEANUP_1;
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}
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rc = vpx_codec_control(vc->encoder, VP8E_SET_CPUUSED, cpu_used_value);
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if (rc != VPX_CODEC_OK) {
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LOGGER_ERROR(log, "Failed to set encoder control setting: %s", vpx_codec_err_to_string(rc));
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vpx_codec_destroy(vc->encoder);
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goto BASE_CLEANUP_1;
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}
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/*
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* VPX_CTRL_USE_TYPE(VP8E_SET_NOISE_SENSITIVITY, unsigned int)
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* control function to set noise sensitivity
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* 0: off, 1: OnYOnly, 2: OnYUV, 3: OnYUVAggressive, 4: Adaptive
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*/
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#if 0
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rc = vpx_codec_control(vc->encoder, VP8E_SET_NOISE_SENSITIVITY, 2);
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if (rc != VPX_CODEC_OK) {
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LOGGER_ERROR(log, "Failed to set encoder control setting: %s", vpx_codec_err_to_string(rc));
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vpx_codec_destroy(vc->encoder);
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goto BASE_CLEANUP_1;
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}
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#endif /* 0 */
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vc->linfts = current_time_monotonic(mono_time);
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vc->lcfd = 60;
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vc->vcb = cb;
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vc->vcb_user_data = cb_data;
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vc->friend_number = friend_number;
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vc->av = av;
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vc->log = log;
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return vc;
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BASE_CLEANUP_1:
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vpx_codec_destroy(vc->decoder);
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BASE_CLEANUP:
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pthread_mutex_destroy(vc->queue_mutex);
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rb_kill(vc->vbuf_raw);
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free(vc);
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return nullptr;
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}
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void vc_kill(VCSession *vc)
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{
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if (vc == nullptr) {
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return;
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}
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vpx_codec_destroy(vc->encoder);
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vpx_codec_destroy(vc->decoder);
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void *p;
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while (rb_read(vc->vbuf_raw, &p)) {
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free(p);
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}
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rb_kill(vc->vbuf_raw);
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pthread_mutex_destroy(vc->queue_mutex);
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LOGGER_DEBUG(vc->log, "Terminated video handler: %p", (void *)vc);
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free(vc);
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}
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void vc_iterate(VCSession *vc)
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{
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if (vc == nullptr) {
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return;
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}
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pthread_mutex_lock(vc->queue_mutex);
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struct RTPMessage *p;
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if (!rb_read(vc->vbuf_raw, (void **)&p)) {
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LOGGER_TRACE(vc->log, "no Video frame data available");
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pthread_mutex_unlock(vc->queue_mutex);
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return;
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}
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const uint16_t log_rb_size = rb_size(vc->vbuf_raw);
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pthread_mutex_unlock(vc->queue_mutex);
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const struct RTPHeader *const header = &p->header;
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uint32_t full_data_len;
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if ((header->flags & RTP_LARGE_FRAME) != 0) {
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full_data_len = header->data_length_full;
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LOGGER_DEBUG(vc->log, "vc_iterate:001:full_data_len=%d", (int)full_data_len);
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} else {
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full_data_len = p->len;
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LOGGER_DEBUG(vc->log, "vc_iterate:002");
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}
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LOGGER_DEBUG(vc->log, "vc_iterate: rb_read p->len=%d p->header.xe=%d", (int)full_data_len, p->header.xe);
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LOGGER_DEBUG(vc->log, "vc_iterate: rb_read rb size=%d", (int)log_rb_size);
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const vpx_codec_err_t rc = vpx_codec_decode(vc->decoder, p->data, full_data_len, nullptr, MAX_DECODE_TIME_US);
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free(p);
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if (rc != VPX_CODEC_OK) {
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LOGGER_ERROR(vc->log, "Error decoding video: %d %s", (int)rc, vpx_codec_err_to_string(rc));
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return;
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}
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/* Play decoded images */
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vpx_codec_iter_t iter = nullptr;
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for (vpx_image_t *dest = vpx_codec_get_frame(vc->decoder, &iter);
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dest != nullptr;
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dest = vpx_codec_get_frame(vc->decoder, &iter)) {
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if (vc->vcb != nullptr) {
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vc->vcb(vc->av, vc->friend_number, dest->d_w, dest->d_h,
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dest->planes[0], dest->planes[1], dest->planes[2],
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dest->stride[0], dest->stride[1], dest->stride[2], vc->vcb_user_data);
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}
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vpx_img_free(dest); // is this needed? none of the VPx examples show that
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}
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}
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int vc_queue_message(Mono_Time *mono_time, void *cs, struct RTPMessage *msg)
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{
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VCSession *vc = (VCSession *)cs;
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/* This function is called with complete messages
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* they have already been assembled.
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* this function gets called from handle_rtp_packet() and handle_rtp_packet_v3()
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*/
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if (vc == nullptr || msg == nullptr) {
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free(msg);
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return -1;
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}
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const struct RTPHeader *const header = &msg->header;
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if (msg->header.pt == (RTP_TYPE_VIDEO + 2) % 128) {
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LOGGER_WARNING(vc->log, "Got dummy!");
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free(msg);
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return 0;
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}
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if (msg->header.pt != RTP_TYPE_VIDEO % 128) {
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LOGGER_WARNING(vc->log, "Invalid payload type! pt=%d", (int)msg->header.pt);
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free(msg);
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return -1;
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}
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pthread_mutex_lock(vc->queue_mutex);
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if ((header->flags & RTP_LARGE_FRAME) != 0 && header->pt == RTP_TYPE_VIDEO % 128) {
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LOGGER_DEBUG(vc->log, "rb_write msg->len=%d b0=%d b1=%d", (int)msg->len, (int)msg->data[0], (int)msg->data[1]);
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}
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free(rb_write(vc->vbuf_raw, msg));
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/* Calculate time it took for peer to send us this frame */
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const uint32_t t_lcfd = current_time_monotonic(mono_time) - vc->linfts;
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vc->lcfd = t_lcfd > 100 ? vc->lcfd : t_lcfd;
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vc->linfts = current_time_monotonic(mono_time);
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pthread_mutex_unlock(vc->queue_mutex);
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return 0;
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}
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int vc_reconfigure_encoder(VCSession *vc, uint32_t bit_rate, uint16_t width, uint16_t height, int16_t kf_max_dist)
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{
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if (vc == nullptr) {
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return -1;
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}
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vpx_codec_enc_cfg_t cfg2 = *vc->encoder->config.enc;
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if (cfg2.rc_target_bitrate == bit_rate && cfg2.g_w == width && cfg2.g_h == height && kf_max_dist == -1) {
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return 0; /* Nothing changed */
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}
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if (cfg2.g_w == width && cfg2.g_h == height && kf_max_dist == -1) {
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/* Only bit rate changed */
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LOGGER_INFO(vc->log, "bitrate change from: %u to: %u", (uint32_t)cfg2.rc_target_bitrate, (uint32_t)bit_rate);
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cfg2.rc_target_bitrate = bit_rate;
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const vpx_codec_err_t rc = vpx_codec_enc_config_set(vc->encoder, &cfg2);
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if (rc != VPX_CODEC_OK) {
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LOGGER_ERROR(vc->log, "Failed to set encoder control setting: %s", vpx_codec_err_to_string(rc));
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return -1;
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}
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} else {
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/* Resolution is changed, must reinitialize encoder since libvpx v1.4 doesn't support
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* reconfiguring encoder to use resolutions greater than initially set.
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*/
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LOGGER_DEBUG(vc->log, "Have to reinitialize vpx encoder on session %p", (void *)vc);
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vpx_codec_ctx_t new_c;
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vpx_codec_enc_cfg_t cfg;
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vc_init_encoder_cfg(vc->log, &cfg, kf_max_dist);
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cfg.rc_target_bitrate = bit_rate;
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cfg.g_w = width;
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cfg.g_h = height;
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LOGGER_DEBUG(vc->log, "Using VP8 codec for encoder");
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vpx_codec_err_t rc = vpx_codec_enc_init(&new_c, video_codec_encoder_interface(), &cfg, VPX_CODEC_USE_FRAME_THREADING);
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if (rc != VPX_CODEC_OK) {
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LOGGER_ERROR(vc->log, "Failed to initialize encoder: %s", vpx_codec_err_to_string(rc));
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return -1;
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}
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const int cpu_used_value = VP8E_SET_CPUUSED_VALUE;
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rc = vpx_codec_control(&new_c, VP8E_SET_CPUUSED, cpu_used_value);
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if (rc != VPX_CODEC_OK) {
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LOGGER_ERROR(vc->log, "Failed to set encoder control setting: %s", vpx_codec_err_to_string(rc));
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vpx_codec_destroy(&new_c);
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return -1;
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}
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vpx_codec_destroy(vc->encoder);
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memcpy(vc->encoder, &new_c, sizeof(new_c));
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}
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return 0;
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}
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