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server/red_worker: add an option to supply the bandwidth via env var

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SPICE_BIT_RATE can be set for supplying red_worker the available
bandwidth (in Mbps).
This commit is contained in:
Yonit Halperin 2013-02-19 08:34:18 -05:00
parent 4c79f325e2
commit 167f999992
1 changed files with 24 additions and 5 deletions
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29
server/red_worker.c
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@ -2879,19 +2879,38 @@ static inline Stream *red_alloc_stream(RedWorker *worker)
static uint64_t red_stream_get_initial_bit_rate(DisplayChannelClient *dcc,
Stream *stream)
{
uint64_t max_bit_rate;
MainChannelClient *mcc;
char *env_bit_rate_str;
uint64_t bit_rate = 0;
mcc = red_client_get_main(dcc->common.base.client);
max_bit_rate = main_channel_client_get_bitrate_per_sec(mcc);
env_bit_rate_str = getenv("SPICE_BIT_RATE");
if (env_bit_rate_str != NULL) {
double env_bit_rate;
if (max_bit_rate > dcc->streams_max_bit_rate) {
dcc->streams_max_bit_rate = max_bit_rate;
errno = 0;
env_bit_rate = strtod(env_bit_rate_str, NULL);
if (errno == 0) {
bit_rate = env_bit_rate * 1024 * 1024;
} else {
spice_warning("error parsing SPICE_BIT_RATE: %s", strerror(errno));
}
}
if (!bit_rate) {
bit_rate = main_channel_client_get_bitrate_per_sec(mcc);
if (bit_rate > dcc->streams_max_bit_rate) {
dcc->streams_max_bit_rate = bit_rate;
} else {
bit_rate = dcc->streams_max_bit_rate;
}
}
spice_debug("base-bit-rate %.2f (Mbps)", bit_rate / 1024.0 /1024.0);
/* dividing the available bandwidth among the active streams, and saving
* (1-RED_STREAM_CHANNEL_CAPACITY) of it for other messages */
return (RED_STREAM_CHANNEL_CAPACITY * dcc->streams_max_bit_rate *
return (RED_STREAM_CHANNEL_CAPACITY * bit_rate *
stream->width * stream->height) / dcc->common.worker->streams_size_total;
}