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xrdp/xrdpvr/xrdpvr.c

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/**
* xrdp: A Remote Desktop Protocol server.
*
* Copyright (C) Laxmikant Rashinkar 2012-2013 LK.Rashinkar@gmail.com
* Copyright (C) Jay Sorg 2013 jay.sorg@gmail.com
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* a program that uses xrdpapi and ffmpeg to redirect media streams
* to a FreeRDP client where it is decompressed and played locally
*
*/
#if defined(HAVE_CONFIG_H)
#include <config_ac.h>
#endif
#include "xrdpvr.h"
#include "xrdpvr_internal.h"
/* globals */
PLAYER_STATE_INFO g_psi;
int g_video_index = -1;
int g_audio_index = -1;
/*****************************************************************************/
/* produce a hex dump */
void
hexdump(char *p, int len)
{
unsigned char *line;
int i;
int thisline;
int offset;
line = (unsigned char *)p;
offset = 0;
while (offset < len)
{
printf("%04x ", offset);
thisline = len - offset;
if (thisline > 16)
{
thisline = 16;
}
for (i = 0; i < thisline; i++)
{
printf("%02x ", line[i]);
}
for (; i < 16; i++)
{
printf(" ");
}
for (i = 0; i < thisline; i++)
{
printf("%c", (line[i] >= 0x20 && line[i] < 0x7f) ? line[i] : '.');
}
printf("\n");
offset += thisline;
line += thisline;
}
}
/**
* initialize the media player
*
* @param channel opaque handle returned by WTSVirtualChannelOpenEx
* @param stream_id unique identification number for this stream
* @param filename media file to play
*
* @return 0 on success, -1 on error
*****************************************************************************/
int
xrdpvr_init_player(void *channel, int stream_id, char *filename)
{
printf("xrdpvr_init_player:\n");
if ((channel == NULL) || (stream_id <= 0) || (filename == NULL))
{
return -1;
}
xrdpvr_send_init(channel);
}
/**
* de-initialize the media player
*
* @param channel opaque handle returned by WTSVirtualChannelOpenEx
* @param stream_id unique identification number for this stream
*
* @return 0 on success, -1 on error
*****************************************************************************/
int
xrdpvr_deinit_player(void *channel, int stream_id)
{
STREAM *s;
char *cptr;
int rv;
int len;
if ((channel == NULL) || (stream_id <= 0))
{
return -1;
}
/* do local clean up */
if (g_psi.frame != 0)
{
av_free(g_psi.frame);
g_psi.frame = 0;
}
if (g_psi.p_audio_codec_ctx != 0)
{
avcodec_close(g_psi.p_audio_codec_ctx);
g_psi.p_audio_codec_ctx = 0;
}
if (g_psi.p_video_codec_ctx != 0)
{
avcodec_close(g_psi.p_video_codec_ctx);
g_psi.p_video_codec_ctx = 0;
}
//avformat_close_input(&g_psi.p_format_ctx);
if (g_psi.p_format_ctx != 0)
{
av_close_input_file(g_psi.p_format_ctx);
g_psi.p_format_ctx = 0;
}
/* do remote cleanup */
stream_new(s, MAX_PDU_SIZE);
stream_ins_u32_le(s, 0); /* number of bytes to follow */
stream_ins_u32_le(s, CMD_DEINIT_XRDPVR);
stream_ins_u32_le(s, stream_id);
/* insert number of bytes in stream */
len = stream_length(s) - 4;
cptr = s->p;
s->p = s->data;
stream_ins_u32_le(s, len);
s->p = cptr;
/* write data to virtual channel */
rv = xrdpvr_write_to_client(channel, s);
stream_free(s);
return 0;
}
/**
* play the media
*
* @param channel opaque handle returned by WTSVirtualChannelOpenEx
* @param stream_id unique identification number for this stream
* @param filename media file to play
*
* @return 0 on success, -1 on error
*****************************************************************************/
int
xrdpvr_play_media(void *channel, int stream_id, char *filename)
{
int i;
printf("$$$$$$ xrdpvr_play_media: setting audioTimeout & "
"videoTimeout to -1\n");
g_psi.videoTimeout = -1;
g_psi.audioTimeout = -1;
/* register all available fileformats and codecs */
av_register_all();
/* open media file - this will read just the header */
//if (avformat_open_input(&g_psi.p_format_ctx, filename, NULL, NULL))
if (av_open_input_file(&g_psi.p_format_ctx, filename, NULL, 0, NULL))
{
printf("ERROR opening %s\n", filename);
return -1;
}
/* now get the real stream info */
//if (avformat_find_stream_info(g_psi.p_format_ctx, NULL) < 0)
if (av_find_stream_info(g_psi.p_format_ctx) < 0)
{
printf("ERROR reading stream info\n");
return -1;
}
#if 1
/* print media info to standard out */
av_dump_format(g_psi.p_format_ctx, 0, filename, 0);
#endif
printf("nb_streams %d\n", g_psi.p_format_ctx->nb_streams);
g_audio_index = -1;
g_video_index = -1;
/* find first audio / video stream */
for (i = 0; i < g_psi.p_format_ctx->nb_streams; i++)
{
if (g_psi.p_format_ctx->streams[i]->codec->codec_type ==
CODEC_TYPE_VIDEO &&
g_psi.p_format_ctx->streams[i]->codec->codec_id ==
CODEC_ID_H264 &&
g_video_index < 0)
{
g_video_index = i;
}
if (g_psi.p_format_ctx->streams[i]->codec->codec_type ==
CODEC_TYPE_AUDIO &&
g_psi.p_format_ctx->streams[i]->codec->codec_id ==
CODEC_ID_AAC &&
g_audio_index < 0)
{
g_audio_index = i;
}
}
if ((g_audio_index < 0) || (g_video_index < 0))
{
/* close file and return with error */
printf("ERROR: no audio/video stream found in %s\n", filename);
//avformat_close_input(&g_psi.p_format_ctx);
av_close_input_file(g_psi.p_format_ctx);
return -1;
}
g_psi.audio_stream_index = g_audio_index;
g_psi.video_stream_index = g_video_index;
/* get pointers to codex contexts for both streams */
g_psi.p_audio_codec_ctx = g_psi.p_format_ctx->streams[g_audio_index]->codec;
g_psi.p_video_codec_ctx = g_psi.p_format_ctx->streams[g_video_index]->codec;
/* find decoder for audio stream */
g_psi.p_audio_codec =
avcodec_find_decoder(g_psi.p_audio_codec_ctx->codec_id);
if (g_psi.p_audio_codec == NULL)
{
printf("ERROR: audio codec not supported\n");
}
/* find decoder for video stream */
g_psi.p_video_codec =
avcodec_find_decoder(g_psi.p_video_codec_ctx->codec_id);
if (g_psi.p_video_codec == NULL)
{
printf("ERROR: video codec not supported\n");
}
/* open decoder for audio stream */
//if (avcodec_open2(g_psi.p_audio_codec_ctx, g_psi.p_audio_codec,
// NULL) < 0)
if (avcodec_open(g_psi.p_audio_codec_ctx, g_psi.p_audio_codec) < 0)
{
printf("ERROR: could not open audio decoder\n");
return -1;
}
printf("%d\n", g_psi.p_audio_codec_ctx->extradata_size);
hexdump(g_psi.p_audio_codec_ctx->extradata,
g_psi.p_audio_codec_ctx->extradata_size);
printf("%d %d %d %d\n", g_psi.p_audio_codec_ctx->sample_rate,
g_psi.p_audio_codec_ctx->bit_rate,
g_psi.p_audio_codec_ctx->channels,
g_psi.p_audio_codec_ctx->block_align);
/* open decoder for video stream */
//if (avcodec_open2(g_psi.p_video_codec_ctx, g_psi.p_video_codec,
// NULL) < 0)
if (avcodec_open(g_psi.p_video_codec_ctx, g_psi.p_video_codec) < 0)
{
printf("ERROR: could not open video decoder\n");
return -1;
}
g_psi.bsfc = av_bitstream_filter_init("h264_mp4toannexb");
printf("g_psi.bsfc %p\n", g_psi.bsfc);
if (xrdpvr_set_video_format(channel, 101, 0,
g_psi.p_video_codec_ctx->width,
g_psi.p_video_codec_ctx->height))
{
printf("xrdpvr_set_video_format() failed\n");
return -1;
}
printf("xrdpvr_play_media: calling xrdpvr_set_audio_format\n");
if (xrdpvr_set_audio_format(channel, 101, 0,
g_psi.p_audio_codec_ctx->extradata,
g_psi.p_audio_codec_ctx->extradata_size,
g_psi.p_audio_codec_ctx->sample_rate,
g_psi.p_audio_codec_ctx->bit_rate,
g_psi.p_audio_codec_ctx->channels,
g_psi.p_audio_codec_ctx->block_align))
{
printf("xrdpvr_set_audio_format() failed\n");
return 1;
}
return 0;
}
static int firstAudioPkt = 1;
static int firstVideoPkt = 1;
/******************************************************************************/
int
xrdpvr_get_frame(void **av_pkt_ret, int *is_video_frame, int *delay_in_us)
{
AVPacket *av_pkt;
double dts;
int error;
AVBitStreamFilterContext *bsfc;
AVPacket new_pkt;
//printf("xrdpvr_get_frame:\n");
/* alloc an AVPacket */
if ((av_pkt = (AVPacket *) malloc(sizeof(AVPacket))) == NULL)
return -1;
/* read one frame into AVPacket */
if (av_read_frame(g_psi.p_format_ctx, av_pkt) < 0)
{
free(av_pkt);
return -1;
}
if (av_pkt->stream_index == g_audio_index)
{
/* got an audio packet */
dts = av_pkt->dts;
dts *= av_q2d(g_psi.p_format_ctx->streams[g_audio_index]->time_base);
if (g_psi.audioTimeout < 0)
{
*delay_in_us = 1000 * 5;
g_psi.audioTimeout = dts;
}
else
{
*delay_in_us = (int) ((dts - g_psi.audioTimeout) * 1000000);
g_psi.audioTimeout = dts;
}
*is_video_frame = 0;
if (firstAudioPkt)
{
firstAudioPkt = 0;
}
}
else if (av_pkt->stream_index == g_video_index)
{
bsfc = g_psi.bsfc;
while (bsfc != 0)
{
new_pkt = *av_pkt;
error = av_bitstream_filter_filter(bsfc, g_psi.p_video_codec_ctx, 0,
&new_pkt.data, &new_pkt.size,
av_pkt->data, av_pkt->size,
av_pkt->flags & PKT_FLAG_KEY);
if (error > 0)
{
av_free_packet(av_pkt);
new_pkt.destruct = av_destruct_packet;
}
else if (error < 0)
{
printf("bitstream filter error\n");
}
*av_pkt = new_pkt;
bsfc = bsfc->next;
}
dts = av_pkt->dts;
dts *= av_q2d(g_psi.p_format_ctx->streams[g_video_index]->time_base);
if (g_psi.videoTimeout < 0)
{
*delay_in_us = 1000 * 5;
g_psi.videoTimeout = dts;
}
else
{
*delay_in_us = (int) ((dts - g_psi.videoTimeout) * 1000000);
g_psi.videoTimeout = dts;
}
*is_video_frame = 1;
if (firstVideoPkt)
{
firstVideoPkt = 0;
}
}
*av_pkt_ret = av_pkt;
return 0;
}
/******************************************************************************/
int
send_audio_pkt(void *channel, int stream_id, void *pkt_p)
{
AVPacket *av_pkt = (AVPacket *) pkt_p;
xrdpvr_send_audio_data(channel, stream_id, av_pkt->size, av_pkt->data);
av_free_packet(av_pkt);
free(av_pkt);
}
/******************************************************************************/
int
send_video_pkt(void *channel, int stream_id, void *pkt_p)
{
AVPacket *av_pkt = (AVPacket *) pkt_p;
xrdpvr_send_video_data(channel, stream_id, av_pkt->size, av_pkt->data);
av_free_packet(av_pkt);
free(av_pkt);
}
/******************************************************************************/
int
xrdpvr_play_frame(void *channel, int stream_id, int *videoTimeout,
int *audioTimeout)
{
AVPacket av_pkt;
double dts;
int delay_in_us;
int error;
AVBitStreamFilterContext *bsfc;
AVPacket new_pkt;
//printf("xrdpvr_play_frame:\n");
if (av_read_frame(g_psi.p_format_ctx, &av_pkt) < 0)
{
printf("xrdpvr_play_frame: av_read_frame failed\n");
return -1;
}
if (av_pkt.stream_index == g_audio_index)
{
xrdpvr_send_audio_data(channel, stream_id, av_pkt.size, av_pkt.data);
dts = av_pkt.dts;
dts *= av_q2d(g_psi.p_format_ctx->streams[g_audio_index]->time_base);
*audioTimeout = (int) ((dts - g_psi.audioTimeout) * 1000000);
*videoTimeout = -1;
if (g_psi.audioTimeout > dts)
{
g_psi.audioTimeout = dts;
delay_in_us = 1000 * 40;
}
else
{
delay_in_us = (int) ((dts - g_psi.audioTimeout) * 1000000);
g_psi.audioTimeout = dts;
}
printf("audio delay: %d\n", delay_in_us);
usleep(delay_in_us);
//usleep(1000 * 1);
}
else if (av_pkt.stream_index == g_video_index)
{
bsfc = g_psi.bsfc;
while (bsfc != 0)
{
new_pkt= av_pkt;
error = av_bitstream_filter_filter(bsfc, g_psi.p_video_codec_ctx, 0,
&new_pkt.data, &new_pkt.size,
av_pkt.data, av_pkt.size,
av_pkt.flags & PKT_FLAG_KEY);
if (error > 0)
{
av_free_packet(&av_pkt);
new_pkt.destruct = av_destruct_packet;
}
else if (error < 0)
{
printf("bitstream filter error\n");
}
av_pkt = new_pkt;
bsfc = bsfc->next;
}
xrdpvr_send_video_data(channel, stream_id, av_pkt.size, av_pkt.data);
dts = av_pkt.dts;
dts *= av_q2d(g_psi.p_format_ctx->streams[g_video_index]->time_base);
*videoTimeout = (int) ((dts - g_psi.videoTimeout) * 1000000);
*audioTimeout = -1;
if (g_psi.videoTimeout > dts)
{
g_psi.videoTimeout = dts;
delay_in_us = 1000 * 40;
}
else
{
delay_in_us = (int) ((dts - g_psi.videoTimeout) * 1000000);
g_psi.videoTimeout = dts;
}
printf("video delay: %d\n", delay_in_us);
usleep(delay_in_us);
}
av_free_packet(&av_pkt);
return 0;
}
/******************************************************************************/
int
xrdpvr_seek_media(int64_t pos, int backward)
{
int64_t seek_target;
int seek_flag;
printf("xrdpvr_seek_media() entered\n");
g_psi.audioTimeout = -1;
g_psi.videoTimeout = -1;
seek_flag = (backward) ? AVSEEK_FLAG_BACKWARD : 0;
seek_target = av_rescale_q(pos * AV_TIME_BASE,
AV_TIME_BASE_Q,
g_psi.p_format_ctx->streams[g_video_index]->time_base);
if (av_seek_frame(g_psi.p_format_ctx, g_video_index, seek_target,
seek_flag) < 0)
{
printf("media seek error\n");
return -1;
}
printf("xrdpvr_seek_media: success\n");
return 0;
}
/******************************************************************************/
void
xrdpvr_get_media_duration(int64_t *start_time, int64_t *duration)
{
*start_time = g_psi.p_format_ctx->start_time / AV_TIME_BASE;
*duration = g_psi.p_format_ctx->duration / AV_TIME_BASE;
}
/******************************************************************************/
int
xrdpvr_set_geometry(void *channel, int stream_id, int xpos, int ypos,
int width, int height)
{
STREAM *s;
char *cptr;
int rv;
int len;
printf("xrdpvr_set_geometry: entered; x=%d y=%d\n", xpos, ypos);
stream_new(s, MAX_PDU_SIZE);
stream_ins_u32_le(s, 0); /* number of bytes to follow */
stream_ins_u32_le(s, CMD_SET_GEOMETRY);
stream_ins_u32_le(s, stream_id);
stream_ins_u32_le(s, xpos);
stream_ins_u32_le(s, ypos);
stream_ins_u32_le(s, width);
stream_ins_u32_le(s, height);
/* insert number of bytes in stream */
len = stream_length(s) - 4;
cptr = s->p;
s->p = s->data;
stream_ins_u32_le(s, len);
s->p = cptr;
/* write data to virtual channel */
rv = xrdpvr_write_to_client(channel, s);
stream_free(s);
return rv;
}
/**
* set video format
*
* @param channel opaque handle returned by WTSVirtualChannelOpenEx
* @param stream_id unique identification number for this stream
*
* @return 0 on success, -1 on error
*****************************************************************************/
int
xrdpvr_set_video_format(void *channel, uint32_t stream_id, int format,
int width, int height)
{
STREAM *s;
char *cptr;
int rv;
int len;
width = (width + 15) & ~15;
stream_new(s, MAX_PDU_SIZE);
stream_ins_u32_le(s, 0); /* number of bytes to follow */
stream_ins_u32_le(s, CMD_SET_VIDEO_FORMAT);
stream_ins_u32_le(s, stream_id);
stream_ins_u32_le(s, format);
stream_ins_u32_le(s, width);
stream_ins_u32_le(s, height);
/* insert number of bytes in stream */
len = stream_length(s) - 4;
cptr = s->p;
s->p = s->data;
stream_ins_u32_le(s, len);
s->p = cptr;
/* write data to virtual channel */
rv = xrdpvr_write_to_client(channel, s);
stream_free(s);
return rv;
}
/**
* set audio format
*
* @param channel opaque handle returned by WTSVirtualChannelOpenEx
* @param stream_id unique identification number for this stream
*
* @return 0 on success, -1 on error
*****************************************************************************/
int
xrdpvr_set_audio_format(void *channel, uint32_t stream_id, int format,
char *extradata, int extradata_size, int sample_rate,
int bit_rate, int channels, int block_align)
{
STREAM *s;
char *cptr;
int rv;
int len;
stream_new(s, MAX_PDU_SIZE);
printf("extradata_size %d sample_rate %d bit_rate %d channels %d "
"block_align %d\n", extradata_size, sample_rate, bit_rate,
channels, block_align);
stream_ins_u32_le(s, 0); /* number of bytes to follow */
stream_ins_u32_le(s, CMD_SET_AUDIO_FORMAT);
stream_ins_u32_le(s, stream_id);
stream_ins_u32_le(s, format);
stream_ins_u32_le(s, extradata_size);
memcpy(s->p, extradata, extradata_size);
s->p += extradata_size;
stream_ins_u32_le(s, sample_rate);
stream_ins_u32_le(s, bit_rate);
stream_ins_u32_le(s, channels);
stream_ins_u32_le(s, block_align);
/* insert number of bytes in stream */
len = stream_length(s) - 4;
cptr = s->p;
s->p = s->data;
stream_ins_u32_le(s, len);
s->p = cptr;
/* write data to virtual channel */
rv = xrdpvr_write_to_client(channel, s);
stream_free(s);
return rv;
}
/**
* send video data to client
*
* @param channel opaque handle returned by WTSVirtualChannelOpenEx
* @param stream_id unique identification number for this stream
* @param data_len number of bytes to send
* @param data video data to send
*
* @return 0 on success, -1 on error
*****************************************************************************/
int
xrdpvr_send_video_data(void *channel, uint32_t stream_id,
uint32_t data_len, uint8_t *data)
{
STREAM *s;
char *cptr;
int rv;
int len;
//printf("xrdpvr_send_video_data:\n");
stream_new(s, MAX_PDU_SIZE + data_len);
stream_ins_u32_le(s, 0); /* number of bytes to follow */
stream_ins_u32_le(s, CMD_SEND_VIDEO_DATA);
stream_ins_u32_le(s, stream_id);
stream_ins_u32_le(s, data_len);
stream_ins_byte_array(s, data, data_len);
/* insert number of bytes in stream */
len = stream_length(s) - 4;
cptr = s->p;
s->p = s->data;
stream_ins_u32_le(s, len);
s->p = cptr;
/* write data to virtual channel */
rv = xrdpvr_write_to_client(channel, s);
stream_free(s);
#ifdef DEBUG_FRAGMENTS
printf("### sent %d + 4 bytes video data to client\n", len);
#endif
return rv;
}
/**
* send audio data to client
*
* @param channel opaque handle returned by WTSVirtualChannelOpenEx
* @param stream_id unique identification number for this stream
* @param data_len number of bytes to send
* @param data audio data to send
*
* @return 0 on success, -1 on error
*****************************************************************************/
int
xrdpvr_send_audio_data(void *channel, uint32_t stream_id, uint32_t data_len,
uint8_t *data)
{
STREAM *s;
char *cptr;
int rv;
int len;
//printf("xrdpvr_send_audio_data:\n");
stream_new(s, MAX_PDU_SIZE + data_len);
stream_ins_u32_le(s, 0); /* number of bytes to follow */
stream_ins_u32_le(s, CMD_SEND_AUDIO_DATA);
stream_ins_u32_le(s, stream_id);
stream_ins_u32_le(s, data_len);
stream_ins_byte_array(s, data, data_len);
/* insert number of bytes in stream */
len = stream_length(s) - 4;
cptr = s->p;
s->p = s->data;
stream_ins_u32_le(s, len);
s->p = cptr;
/* write data to virtual channel */
rv = xrdpvr_write_to_client(channel, s);
stream_free(s);
return rv;
}
/**
* send media meta-data to client
*
* @param channel opaque handle returned by WTSVirtualChannelOpenEx
* @param filename media file
*
* @return 0 on success, -1 on error
*****************************************************************************/
int
xrdpvr_create_metadata_file(void *channel, char *filename)
{
STREAM *s;
char *cptr;
int rv;
int len;
int fd;
if ((fd = open(filename , O_RDONLY)) < 0)
{
return -1;
}
stream_new(s, MAX_PDU_SIZE + 1048576);
/* send CMD_CREATE_META_DATA_FILE */
stream_ins_u32_le(s, 4); /* number of bytes to follow */
stream_ins_u32_le(s, CMD_CREATE_META_DATA_FILE);
if (xrdpvr_write_to_client(channel, s))
{
close(fd);
return -1;
}
/* read first 1MB of file and send to client */
s->p = s->data;
stream_ins_u32_le(s, 0); /* number of bytes to follow */
stream_ins_u32_le(s, CMD_WRITE_META_DATA);
stream_ins_u32_le(s, 0); /* number of bytes to follow */
if ((rv = read(fd, s->p, 1048576)) <= 0)
{
close(fd);
return -1;
}
s->p += rv;
/* insert number of bytes in stream */
len = stream_length(s) - 4;
cptr = s->p;
s->p = s->data;
stream_ins_u32_le(s, len); /* number of bytes in this cmd */
s->p += 4;
stream_ins_u32_le(s, rv); /* number of metadata bytes */
s->p = cptr;
/* write data to virtual channel */
rv = xrdpvr_write_to_client(channel, s);
/* send CMD_CLOSE_META_DATA_FILE */
s->p = s->data;
stream_ins_u32_le(s, 4); /* number of bytes to follow */
stream_ins_u32_le(s, CMD_CLOSE_META_DATA_FILE);
if (xrdpvr_write_to_client(channel, s))
{
close(fd);
return -1;
}
stream_free(s);
return rv;
}
/**
******************************************************************************/
static int
xrdpvr_read_from_client(void *channel, STREAM *s, int bytes, int timeout)
{
unsigned int bytes_read;
int total_read;
int ok;
//printf("xrdpvr_read_from_client:\n");
total_read = 0;
while (total_read < bytes)
{
//printf("xrdpvr_read_from_client: loop\n");
bytes_read = bytes - total_read;
ok = WTSVirtualChannelRead(channel, timeout, s->p, bytes_read,
&bytes_read);
//printf("xrdpvr_read_from_client: loop ok %d\n", ok);
if (ok)
{
//printf("xrdpvr_read_from_client: bytes_read %d\n", bytes_read);
total_read += bytes_read;
s->p += bytes_read;
}
}
return 0;
}
/**
* write data to a xrdpvr client
*
* @param channel opaque handle returned by WTSVirtualChannelOpenEx
* @param s structure containing data to write
*
* @return 0 on success, -1 on failure
******************************************************************************/
static int
xrdpvr_write_to_client(void *channel, STREAM *s)
{
int bytes_to_send;
int bytes_written;
int index = 0;
int rv;
if ((channel == NULL) || (s == NULL))
{
return -1;
}
bytes_to_send = stream_length(s);
while (1)
{
rv = WTSVirtualChannelWrite(channel, &s->data[index], bytes_to_send,
&bytes_written);
if (rv == 0)
{
return -1;
}
index += bytes_written;
bytes_to_send -= bytes_written;
if ((rv == 0) && (bytes_to_send == 0))
{
return 0;
}
usleep(1000 * 3);
}
}
/**
* write set volume to a xrdpvr client
*
* @param channel opaque handle returned by WTSVirtualChannelOpenEx
* @param volume volume 0x0000 to 0xffff
*
* @return 0 on success, -1 on failure
******************************************************************************/
int
xrdpvr_set_volume(void *channel, int volume)
{
STREAM *s;
char *cptr;
int rv;
int len;
stream_new(s, MAX_BUFSIZE);
stream_ins_u32_le(s, 0); /* number of bytes to follow */
stream_ins_u32_le(s, CMD_SET_VOLUME);
stream_ins_u32_le(s, volume);
/* insert number of bytes in stream */
len = stream_length(s) - 4;
cptr = s->p;
s->p = s->data;
stream_ins_u32_le(s, len);
s->p = cptr;
/* write data to virtual channel */
rv = xrdpvr_write_to_client(channel, s);
stream_free(s);
return rv;
}
int
xrdpvr_send_init(void *channel)
{
STREAM *s;
char *cptr;
int rv;
int len;
printf("xrdpvr_send_init:\n");
stream_new(s, MAX_BUFSIZE);
stream_ins_u32_le(s, 0); /* number of bytes to follow */
stream_ins_u32_le(s, CMD_INIT_XRDPVR);
/* insert number of bytes in stream */
len = stream_length(s) - 4;
cptr = s->p;
s->p = s->data;
stream_ins_u32_le(s, len);
s->p = cptr;
/* write data to virtual channel */
rv = xrdpvr_write_to_client(channel, s);
stream_free(s);
return rv;
}
int
xrdpvr_read_ack(void *channel, int *frame)
{
STREAM *s;
stream_new(s, MAX_PDU_SIZE);
xrdpvr_read_from_client(channel, s, 4, 1000);
s->p = s->data;
stream_ext_u32_le(s, *frame);
stream_free(s);
return 0;
}
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