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/**
* @file gst_video/encode.c Video codecs using Gstreamer video pipeline
*
* Copyright (C) 2010 - 2013 Creytiv.com
* Copyright (C) 2014 Fadeev Alexander
* Copyright (C) 2015 Thomas Strobel
*/
#define __USE_POSIX199309
#define _DEFAULT_SOURCE 1
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
#include <unistd.h>
#include <pthread.h>
#include <re.h>
#include <rem.h>
#include <baresip.h>
#include <gst/gst.h>
#include <gst/video/video.h>
#include <gst/app/gstappsrc.h>
#include <gst/app/gstappsink.h>
#include "gst_video.h"
struct videnc_state {
struct {
struct vidsz size;
unsigned fps;
unsigned bitrate;
unsigned pktsize;
} encoder;
struct {
uint32_t packetization_mode;
uint32_t profile_idc;
uint32_t profile_iop;
uint32_t level_idc;
uint32_t max_fs;
uint32_t max_smbps;
} h264;
videnc_packet_h *pkth;
void *arg;
/* Gstreamer */
struct {
bool valid;
GstElement *pipeline;
GstAppSrc *source;
GstAppSrcCallbacks appsrcCallbacks;
GstAppSinkCallbacks appsinkCallbacks;
struct {
pthread_mutex_t mutex;
pthread_cond_t cond;
int flag;
} eos;
/* Thread synchronization. */
struct {
pthread_mutex_t mutex;
pthread_cond_t cond;
/* 0: no-wait, 1: wait, -1: pipeline destroyed */
int flag;
} wait;
} streamer;
};
static void appsrc_need_data_cb(GstAppSrc *src, guint size, gpointer user_data)
{
struct videnc_state *st = user_data;
(void)src;
(void)size;
pthread_mutex_lock(&st->streamer.wait.mutex);
if (st->streamer.wait.flag == 1){
st->streamer.wait.flag = 0;
pthread_cond_signal(&st->streamer.wait.cond);
}
pthread_mutex_unlock(&st->streamer.wait.mutex);
}
static void appsrc_enough_data_cb(GstAppSrc *src, gpointer user_data)
{
struct videnc_state *st = user_data;
(void)src;
pthread_mutex_lock(&st->streamer.wait.mutex);
if (st->streamer.wait.flag == 0)
st->streamer.wait.flag = 1;
pthread_mutex_unlock(&st->streamer.wait.mutex);
}
static void appsrc_destroy_notify_cb(struct videnc_state *st)
{
pthread_mutex_lock(&st->streamer.wait.mutex);
st->streamer.wait.flag = -1;
pthread_cond_signal(&st->streamer.wait.cond);
pthread_mutex_unlock(&st->streamer.wait.mutex);
}
/* The appsink has received a sample */
static GstFlowReturn appsink_new_sample_cb(GstAppSink *sink,
gpointer user_data)
{
struct videnc_state *st = user_data;
GstSample *sample;
GstBuffer *buffer;
GstMapInfo info;
guint8 *data;
gsize size;
/* Retrieve the sample */
sample = gst_app_sink_pull_sample(sink);
if (sample) {
buffer = gst_sample_get_buffer(sample);
gst_buffer_map( buffer, &info, (GstMapFlags)(GST_MAP_READ) );
data = info.data;
size = info.size;
h264_packetize(data, size, st->encoder.pktsize,
st->pkth, st->arg);
gst_buffer_unmap(buffer, &info);
gst_sample_unref(sample);
}
return GST_FLOW_OK;
}
static void appsink_end_of_stream_cb(GstAppSink *src, gpointer user_data)
{
struct videnc_state *st = user_data;
(void)src;
pthread_mutex_lock(&st->streamer.eos.mutex);
if (st->streamer.eos.flag == 0) {
st->streamer.eos.flag = 1;
pthread_cond_signal(&st->streamer.eos.cond);
}
pthread_mutex_unlock(&st->streamer.eos.mutex);
}
static void appsink_destroy_notify_cb(struct videnc_state *st)
{
pthread_mutex_lock(&st->streamer.eos.mutex);
st->streamer.eos.flag = -1;
pthread_cond_signal(&st->streamer.eos.cond);
pthread_mutex_unlock(&st->streamer.eos.mutex);
}
static GstBusSyncReply bus_sync_handler_cb(GstBus *bus, GstMessage *msg,
struct videnc_state *st)
{
(void)bus;
if ((GST_MESSAGE_TYPE (msg)) == GST_MESSAGE_ERROR) {
GError *err = NULL;
gchar *dbg_info = NULL;
gst_message_parse_error (msg, &err, &dbg_info);
warning("gst_video: Error: %d(%m) message=%s\n",
err->code, err->code, err->message);
warning("gst_video: Debug: %s\n", dbg_info);
g_error_free (err);
g_free (dbg_info);
/* mark pipeline as broked */
st->streamer.valid = false;
}
gst_message_unref(msg);
return GST_BUS_DROP;
}
static void bus_destroy_notify_cb(struct videnc_state *st)
{
(void)st;
}
/**
* Set up the Gstreamer pipeline. Appsrc gets raw frames, and appsink takes
* encoded frames.
*
* The pipeline looks like this:
*
* <pre>
* .--------. .-----------. .----------.
* | appsrc | | x264enc | | appsink |
* | .----| |----. .---| |----. |
* | |src |-->|sink| |src|-->|sink|-----+-->handoff
* | '----| |----' '---| |----' | handler
* '--------' '-----------' '----------'
* </pre>
*/
static int pipeline_init(struct videnc_state *st, const struct vidsz *size)
{
GstAppSrc *source;
GstAppSink *sink;
GstBus *bus;
GError* gerror = NULL;
char pipeline[1024];
GstStateChangeReturn ret;
int err = 0;
if (!st || !size)
return EINVAL;
snprintf(pipeline, sizeof(pipeline),
"appsrc name=source is-live=TRUE block=TRUE "
"do-timestamp=TRUE max-bytes=1000000 ! "
"videoparse width=%d height=%d format=i420 framerate=%d/1 ! "
"x264enc byte-stream=TRUE rc-lookahead=0 "
"sync-lookahead=0 bitrate=%d ! "
"appsink name=sink emit-signals=TRUE drop=TRUE",
size->w, size->h,
st->encoder.fps, st->encoder.bitrate / 1000 /* kbit/s */);
/* Initialize pipeline. */
st->streamer.pipeline = gst_parse_launch(pipeline, &gerror);
if (gerror) {
warning("gst_video: launch error: %d: %s: %s\n",
gerror->code, gerror->message, pipeline);
err = gerror->code;
g_error_free(gerror);
return err;
}
/* Configure appsource */
source = GST_APP_SRC(gst_bin_get_by_name(
GST_BIN(st->streamer.pipeline), "source"));
gst_app_src_set_callbacks(source, &(st->streamer.appsrcCallbacks),
st, (GDestroyNotify)appsrc_destroy_notify_cb);
/* Configure appsink. */
sink = GST_APP_SINK(gst_bin_get_by_name(
GST_BIN(st->streamer.pipeline), "sink"));
gst_app_sink_set_callbacks(sink, &(st->streamer.appsinkCallbacks),
st, (GDestroyNotify)appsink_destroy_notify_cb);
gst_object_unref(GST_OBJECT(sink));
/* Bus watch */
bus = gst_pipeline_get_bus(GST_PIPELINE(st->streamer.pipeline));
gst_bus_set_sync_handler(bus, (GstBusSyncHandler)bus_sync_handler_cb,
st, (GDestroyNotify)bus_destroy_notify_cb);
gst_object_unref(GST_OBJECT(bus));
/* Set start values of locks */
pthread_mutex_lock(&st->streamer.wait.mutex);
st->streamer.wait.flag = 0;
pthread_mutex_unlock(&st->streamer.wait.mutex);
pthread_mutex_lock(&st->streamer.eos.mutex);
st->streamer.eos.flag = 0;
pthread_mutex_unlock(&st->streamer.eos.mutex);
/* Start pipeline */
ret = gst_element_set_state(st->streamer.pipeline, GST_STATE_PLAYING);
if (GST_STATE_CHANGE_FAILURE == ret) {
g_warning("set state returned GST_STATE_CHANGE_FAILURE\n");
err = EPROTO;
goto out;
}
st->streamer.source = source;
/* Mark pipeline as working */
st->streamer.valid = true;
out:
return err;
}
static void pipeline_close(struct videnc_state *st)
{
if (!st)
return;
st->streamer.valid = false;
if (st->streamer.source) {
gst_object_unref(GST_OBJECT(st->streamer.source));
st->streamer.source = NULL;
}
if (st->streamer.pipeline) {
gst_element_set_state(st->streamer.pipeline, GST_STATE_NULL);
/* pipeline */
gst_object_unref(GST_OBJECT(st->streamer.pipeline));
st->streamer.pipeline = NULL;
}
}
static void destruct_resources(void *data)
{
struct videnc_state *st = data;
/* close pipeline */
pipeline_close(st);
/* destroy locks */
pthread_mutex_destroy(&st->streamer.eos.mutex);
pthread_cond_destroy(&st->streamer.eos.cond);
pthread_mutex_destroy(&st->streamer.wait.mutex);
pthread_cond_destroy(&st->streamer.wait.cond);
}
static int allocate_resources(struct videnc_state **stp)
{
struct videnc_state *st;
st = mem_zalloc(sizeof(*st), destruct_resources);
if (!st)
return ENOMEM;
*stp = st;
/* initialize locks */
pthread_mutex_init(&st->streamer.eos.mutex, NULL);
pthread_cond_init(&st->streamer.eos.cond, NULL);
pthread_mutex_init(&st->streamer.wait.mutex, NULL);
pthread_cond_init(&st->streamer.wait.cond, NULL);
/* Set appsource callbacks. */
st->streamer.appsrcCallbacks.need_data = &appsrc_need_data_cb;
st->streamer.appsrcCallbacks.enough_data = &appsrc_enough_data_cb;
/* Set appsink callbacks. */
st->streamer.appsinkCallbacks.new_sample = &appsink_new_sample_cb;
st->streamer.appsinkCallbacks.eos = &appsink_end_of_stream_cb;
return 0;
}
/*
decode sdpparameter for h264
*/
static void param_handler(const struct pl *name, const struct pl *val,
void *arg)
{
struct videnc_state *st = arg;
if (0 == pl_strcasecmp(name, "packetization-mode")) {
st->h264.packetization_mode = pl_u32(val);
if (st->h264.packetization_mode != 0) {
warning("gst_video: illegal packetization-mode %u\n",
st->h264.packetization_mode);
return;
}
}
else if (0 == pl_strcasecmp(name, "profile-level-id")) {
struct pl prof = *val;
if (prof.l != 6) {
warning("gst_video: invalid profile-level-id (%r)\n",
val);
return;
}
prof.l = 2;
st->h264.profile_idc = pl_x32(&prof); prof.p += 2;
st->h264.profile_iop = pl_x32(&prof); prof.p += 2;
st->h264.level_idc = pl_x32(&prof);
}
else if (0 == pl_strcasecmp(name, "max-fs")) {
st->h264.max_fs = pl_u32(val);
}
else if (0 == pl_strcasecmp(name, "max-smbps")) {
st->h264.max_smbps = pl_u32(val);
}
return;
}
int gst_video1_encoder_set(struct videnc_state **stp,
const struct vidcodec *vc,
struct videnc_param *prm, const char *fmtp,
videnc_packet_h *pkth, void *arg)
{
struct videnc_state *st = *stp;
int err = 0;
if (!stp || !vc || !prm || !pkth)
return EINVAL;
if (!st) {
err = allocate_resources(stp);
if (err) {
warning("gst_video: resource allocation failed\n");
return err;
}
st = *stp;
st->pkth = pkth;
st->arg = arg;
}
else {
if (!st->streamer.valid) {
warning("gst_video codec: trying to work"
" with invalid pipeline\n");
return EINVAL;
}
if ((st->encoder.bitrate != prm->bitrate ||
st->encoder.pktsize != prm->pktsize ||
st->encoder.fps != prm->fps)) {
pipeline_close(st);
}
}
st->encoder.bitrate = prm->bitrate;
st->encoder.pktsize = prm->pktsize;
st->encoder.fps = prm->fps;
if (str_isset(fmtp)) {
struct pl sdp_fmtp;
pl_set_str(&sdp_fmtp, fmtp);
/* store new parameters */
fmt_param_apply(&sdp_fmtp, param_handler, st);
}
info("gst_video: video encoder %s: %d fps, %d bit/s, pktsize=%u\n",
vc->name, st->encoder.fps,
st->encoder.bitrate, st->encoder.pktsize);
return err;
}
/*
* couple gstreamer tightly by lock-stepping
*/
static int pipeline_push(struct videnc_state *st, const struct vidframe *frame)
{
GstBuffer *buffer;
uint8_t *data;
size_t size;
GstFlowReturn ret;
int err = 0;
#if 1
/* XXX: should not block the function here */
/*
* Wait "start feed".
*/
pthread_mutex_lock(&st->streamer.wait.mutex);
if (st->streamer.wait.flag == 1) {
pthread_cond_wait(&st->streamer.wait.cond,
&st->streamer.wait.mutex);
}
if (st->streamer.eos.flag == -1)
/* error */
err = ENODEV;
pthread_mutex_unlock(&st->streamer.wait.mutex);
if (err)
return err;
#endif
/*
* Copy frame into buffer for gstreamer
*/
/* NOTE: I420 (YUV420P): hardcoded. */
size = frame->linesize[0] * frame->size.h
+ frame->linesize[1] * frame->size.h * 0.5
+ frame->linesize[2] * frame->size.h * 0.5;
/* allocate memory; memory is freed within callback of
gst_memory_new_wrapped of gst_video_push */
data = g_try_malloc(size);
if (!data)
return ENOMEM;
/* copy content of frame */
size = 0;
memcpy(&data[size], frame->data[0],
frame->linesize[0] * frame->size.h);
size += frame->linesize[0] * frame->size.h;
memcpy(&data[size], frame->data[1],
frame->linesize[1] * frame->size.h * 0.5);
size += frame->linesize[1] * frame->size.h * 0.5;
memcpy(&data[size], frame->data[2],
frame->linesize[2] * frame->size.h * 0.5);
size += frame->linesize[2] * frame->size.h * 0.5;
/* Wrap memory in a gstreamer buffer */
buffer = gst_buffer_new();
gst_buffer_insert_memory(buffer, -1,
gst_memory_new_wrapped (0, data, size, 0,
size, data, g_free));
/*
* Push data and EOS into gstreamer.
*/
ret = gst_app_src_push_buffer(st->streamer.source, buffer);
if (ret != GST_FLOW_OK) {
warning("gst_video: pushing buffer failed\n");
err = EPROTO;
goto out;
}
#if 0
ret = gst_app_src_end_of_stream(st->streamer.source);
if (ret != GST_FLOW_OK) {
warning("gst_video: pushing EOS failed\n");
err = EPROTO;
goto out;
}
#endif
#if 0
/*
* Wait "processing done".
*/
pthread_mutex_lock(&st->streamer.eos.mutex);
if (st->streamer.eos.flag == 0)
/* will returns with EOS (1) or error (-1) */
pthread_cond_wait(&st->streamer.wait.cond,
&st->streamer.wait.mutex);
if (st->streamer.eos.flag == 1)
/* reset eos */
st->streamer.eos.flag = 0;
else
/* error */
err = -1;
pthread_mutex_unlock(&st->streamer.wait.mutex);
#endif
out:
return err;
}
int gst_video1_encode(struct videnc_state *st, bool update,
const struct vidframe *frame)
{
int err;
if (!st || !frame || frame->fmt != VID_FMT_YUV420P)
return EINVAL;
if (!st->streamer.valid ||
!vidsz_cmp(&st->encoder.size, &frame->size)) {
pipeline_close(st);
err = pipeline_init(st, &frame->size);
if (err) {
warning("gst_video: pipeline initialization failed\n");
return err;
}
st->encoder.size = frame->size;
}
if (update) {
debug("gst_video: gstreamer picture update"
", it's not implemented...\n");
}
/*
* Push frame into pipeline.
* Function call will return once frame has been processed completely.
*/
err = pipeline_push(st, frame);
return err;
}
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