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/** video.c
*
* Copyright (C) 2013-2015 Tox project All Rights Reserved.
*
* This file is part of Tox.
*
* Tox is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Tox 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Tox. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif /* HAVE_CONFIG_H */
#include <stdlib.h>
#include <assert.h>
#include "video.h"
#include "msi.h"
#include "rtp.h"
#include "../toxcore/logger.h"
#include "../toxcore/network.h"
#define MAX_DECODE_TIME_US 0 /* Good quality encode. */
#define VIDEO_DECODE_BUFFER_SIZE 20
bool create_video_encoder (vpx_codec_ctx_t *dest, int32_t bit_rate);
VCSession *vc_new(ToxAV *av, uint32_t friend_number, toxav_video_receive_frame_cb *cb, void *cb_data)
{
VCSession *vc = calloc(sizeof(VCSession), 1);
if (!vc) {
LOGGER_WARNING("Allocation failed! Application might misbehave!");
return NULL;
}
if (create_recursive_mutex(vc->queue_mutex) != 0) {
LOGGER_WARNING("Failed to create recursive mutex!");
free(vc);
return NULL;
}
if (!(vc->vbuf_raw = rb_new(VIDEO_DECODE_BUFFER_SIZE)))
goto BASE_CLEANUP;
int rc = vpx_codec_dec_init(vc->decoder, VIDEO_CODEC_DECODER_INTERFACE, NULL, 0);
if (rc != VPX_CODEC_OK) {
LOGGER_ERROR("Init video_decoder failed: %s", vpx_codec_err_to_string(rc));
goto BASE_CLEANUP;
}
if (!create_video_encoder(vc->encoder, 500000)) {
vpx_codec_destroy(vc->decoder);
goto BASE_CLEANUP;
}
vc->linfts = current_time_monotonic();
vc->lcfd = 60;
vc->vcb.first = cb;
vc->vcb.second = cb_data;
vc->friend_number = friend_number;
vc->av = av;
return vc;
BASE_CLEANUP:
pthread_mutex_destroy(vc->queue_mutex);
rb_kill(vc->vbuf_raw);
free(vc);
return NULL;
}
void vc_kill(VCSession *vc)
{
if (!vc)
return;
vpx_codec_destroy(vc->encoder);
vpx_codec_destroy(vc->decoder);
void *p;
while (rb_read(vc->vbuf_raw, (void **)&p))
free(p);
rb_kill(vc->vbuf_raw);
pthread_mutex_destroy(vc->queue_mutex);
LOGGER_DEBUG("Terminated video handler: %p", vc);
free(vc);
}
void vc_iterate(VCSession *vc)
{
if (!vc)
return;
struct RTPMessage *p;
int rc;
pthread_mutex_lock(vc->queue_mutex);
if (rb_read(vc->vbuf_raw, (void **)&p)) {
pthread_mutex_unlock(vc->queue_mutex);
rc = vpx_codec_decode(vc->decoder, p->data, p->len, NULL, MAX_DECODE_TIME_US);
free(p);
if (rc != VPX_CODEC_OK)
LOGGER_ERROR("Error decoding video: %s", vpx_codec_err_to_string(rc));
else {
vpx_codec_iter_t iter = NULL;
vpx_image_t *dest = vpx_codec_get_frame(vc->decoder, &iter);
/* Play decoded images */
for (; dest; dest = vpx_codec_get_frame(vc->decoder, &iter)) {
if (vc->vcb.first)
vc->vcb.first(vc->av, vc->friend_number, dest->d_w, dest->d_h,
(const uint8_t *)dest->planes[0], (const uint8_t *)dest->planes[1], (const uint8_t *)dest->planes[2],
dest->stride[0], dest->stride[1], dest->stride[2], vc->vcb.second);
vpx_img_free(dest);
}
}
return;
}
pthread_mutex_unlock(vc->queue_mutex);
}
int vc_queue_message(void *vcp, struct RTPMessage *msg)
{
/* This function does the reconstruction of video packets.
* See more info about video splitting in docs
*/
if (!vcp || !msg)
return -1;
if (msg->header.pt == (rtp_TypeVideo + 2) % 128) {
LOGGER_WARNING("Got dummy!");
free(msg);
return 0;
}
if (msg->header.pt != rtp_TypeVideo % 128) {
LOGGER_WARNING("Invalid payload type!");
free(msg);
return -1;
}
VCSession *vc = vcp;
pthread_mutex_lock(vc->queue_mutex);
free(rb_write(vc->vbuf_raw, msg));
{
/* Calculate time took for peer to send us this frame */
uint32_t t_lcfd = current_time_monotonic() - vc->linfts;
vc->lcfd = t_lcfd > 100 ? vc->lcfd : t_lcfd;
vc->linfts = current_time_monotonic();
}
pthread_mutex_unlock(vc->queue_mutex);
return 0;
}
int vc_reconfigure_encoder(vpx_codec_ctx_t *vccdc, uint32_t bit_rate, uint16_t width, uint16_t height)
{
if (!vccdc)
return -1;
vpx_codec_enc_cfg_t cfg = *vccdc->config.enc;
if (cfg.rc_target_bitrate == bit_rate && cfg.g_w == width && cfg.g_h == height)
return 0; /* Nothing changed */
cfg.rc_target_bitrate = bit_rate;
cfg.g_w = width;
cfg.g_h = height;
int rc = vpx_codec_enc_config_set(vccdc, &cfg);
if (rc != VPX_CODEC_OK) {
LOGGER_ERROR("Failed to set encoder control setting: %s", vpx_codec_err_to_string(rc));
return -1;
}
return 0;
}
bool create_video_encoder (vpx_codec_ctx_t *dest, int32_t bit_rate)
{
assert(dest);
vpx_codec_enc_cfg_t cfg;
int rc = vpx_codec_enc_config_default(VIDEO_CODEC_ENCODER_INTERFACE, &cfg, 0);
if (rc != VPX_CODEC_OK) {
LOGGER_ERROR("Failed to get config: %s", vpx_codec_err_to_string(rc));
return false;
}
cfg.rc_target_bitrate = bit_rate;
cfg.g_w = 800;
cfg.g_h = 600;
cfg.g_pass = VPX_RC_ONE_PASS;
/* FIXME If we set error resilience the app will crash due to bug in vp8.
Perhaps vp9 has solved it?*/
// cfg.g_error_resilient = VPX_ERROR_RESILIENT_DEFAULT | VPX_ERROR_RESILIENT_PARTITIONS;
cfg.g_lag_in_frames = 0;
cfg.kf_min_dist = 0;
cfg.kf_max_dist = 48;
cfg.kf_mode = VPX_KF_AUTO;
rc = vpx_codec_enc_init(dest, VIDEO_CODEC_ENCODER_INTERFACE, &cfg, 0);
if (rc != VPX_CODEC_OK) {
LOGGER_ERROR("Failed to initialize encoder: %s", vpx_codec_err_to_string(rc));
return false;
}
rc = vpx_codec_control(dest, VP8E_SET_CPUUSED, 8);
if (rc != VPX_CODEC_OK) {
LOGGER_ERROR("Failed to set encoder control setting: %s", vpx_codec_err_to_string(rc));
vpx_codec_destroy(dest);
}
return true;
}
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