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flv_bytestream_ext.c
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flv_bytestream_ext.c
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#include "flv_bytestream_ext.h"
#define CHECK(x)\
do {\
if( (x) < 0 )\
return -1;\
} while( 0 )
rtmp_flv_hnd_t *open_flv_buffer() {
rtmp_flv_hnd_t *p_flv = malloc( sizeof(*p_flv) );
flv_buffer *c = malloc( sizeof(*c) );
if( !p_flv ) {
free(p_flv);
return NULL;
}
memset( p_flv, 0, sizeof(*p_flv) );
if( !c ) {
free(c);
return NULL;
}
memset( c, 0, sizeof(*c) );
p_flv->c = c;
p_flv->b_dts_compress = 0;
return p_flv;
}
RTMP *open_RTMP_stream(char *stream_uri)
{
RTMP_LogSetLevel(RTMP_LOGERROR);
RTMP *rtmp = RTMP_Alloc();
RTMP_Init(rtmp);
RTMP_SetupURL(rtmp, stream_uri);
RTMP_EnableWrite(rtmp); // To publish a stream, enable write support before connect
RTMP_Connect(rtmp, NULL);
RTMP_ConnectStream(rtmp, 0);
return rtmp;
}
int close_RTMP_stream(rtmp_flv_hnd_t handle, RTMP *rtmp)
{
rtmp_flv_hnd_t *p_flv = &handle;
flv_buffer *c = p_flv->c;
RTMP_Close(rtmp);
RTMP_Free(rtmp);
if(c->fp)
fclose( c->fp );
free( c );
return 0;
}
int send_invoke( RTMP *rtmp, uint16_t x, uint16_t y, uint32_t timestamp, const char *room_name )
{
RTMPPacket packet;
AVal name = {room_name, strlen(room_name)};
AVal command = AVC("updateCursorLocation");
char pbuffer[512], *pend = pbuffer + sizeof(pbuffer);
char *enc;
packet.m_nChannel = 0x03;
packet.m_headerType = RTMP_PACKET_SIZE_MEDIUM;
packet.m_packetType = RTMP_PACKET_TYPE_INVOKE;
packet.m_nTimeStamp = 0;
packet.m_nInfoField2 = 0;
packet.m_hasAbsTimestamp = 0;
packet.m_body = pbuffer + RTMP_MAX_HEADER_SIZE;
enc = packet.m_body;
enc = AMF_EncodeString(enc, pend, &command);
enc = AMF_EncodeNumber(enc, pend, ++(rtmp->m_numInvokes));
*enc++ = AMF_NULL;
enc = AMF_EncodeNumber(enc, pend, x);
enc = AMF_EncodeNumber(enc, pend, y);
enc = AMF_EncodeNumber(enc, pend, timestamp);
enc = AMF_EncodeString(enc, pend, &name);
packet.m_nBodySize = enc - packet.m_body;
return RTMP_SendPacket(rtmp, &packet, TRUE);
}
int flv_flush_RTMP_data( RTMP *rtmp, flv_buffer *flv )
{
if( !flv->d_cur )
return 0;
RTMP_Write(rtmp, (char *)flv->data, flv->d_cur);
flv->d_total += flv->d_cur;
flv->d_cur = 0;
return 0;
}
int write_RTMP_header( hnd_t handle, RTMP *rtmp )
{
rtmp_flv_hnd_t *p_flv = (rtmp_flv_hnd_t *)handle;
flv_buffer *c = p_flv->c;
flv_put_tag( c, "FLV" ); // Signature
flv_put_byte( c, 1 ); // Version
flv_put_byte( c, 1 ); // Video Only
flv_put_be32( c, 9 ); // DataOffset
flv_put_be32( c, 0 ); // PreviousTagSize0
return 1;
}
int set_RTMP_param( hnd_t handle, x264_param_t *p_param )
{
rtmp_flv_hnd_t *p_flv = (rtmp_flv_hnd_t *)handle;
flv_buffer *c = p_flv->c;
flv_put_byte( c, FLV_TAG_TYPE_META ); // Tag Type "script data"
int start = c->d_cur;
flv_put_be24( c, 0 ); // data length
flv_put_be24( c, 0 ); // timestamp
flv_put_be32( c, 0 ); // reserved
flv_put_byte( c, AMF_DATA_TYPE_STRING );
flv_put_amf_string( c, "onMetaData" );
flv_put_byte( c, AMF_DATA_TYPE_MIXEDARRAY );
flv_put_be32( c, 7 );
flv_put_amf_string( c, "width" );
flv_put_amf_double( c, p_param->i_width );
flv_put_amf_string( c, "height" );
flv_put_amf_double( c, p_param->i_height );
flv_put_amf_string( c, "framerate" );
if( !p_param->b_vfr_input )
flv_put_amf_double( c, (double)p_param->i_fps_num / p_param->i_fps_den );
else
{
p_flv->i_framerate_pos = c->d_cur + c->d_total + 1;
flv_put_amf_double( c, p_param->i_timebase_den ); // written at end of encoding
}
flv_put_amf_string( c, "videocodecid" );
flv_put_amf_double( c, FLV_CODECID_H264 );
flv_put_amf_string( c, "duration" );
p_flv->i_duration_pos = c->d_cur + c->d_total + 1;
flv_put_amf_double( c, 0 ); // written at end of encoding
flv_put_amf_string( c, "filesize" );
p_flv->i_filesize_pos = c->d_cur + c->d_total + 1;
flv_put_amf_double( c, 0 ); // written at end of encoding
flv_put_amf_string( c, "videodatarate" );
p_flv->i_bitrate_pos = c->d_cur + c->d_total + 1;
flv_put_amf_double( c, 0 ); // written at end of encoding
flv_put_amf_string( c, "" );
flv_put_byte( c, AMF_END_OF_OBJECT );
unsigned length = c->d_cur - start;
flv_rewrite_amf_be24( c, length - 10, start );
flv_put_be32( c, length + 1 ); // tag length
p_flv->i_fps_num = p_param->i_fps_num;
p_flv->i_fps_den = p_param->i_fps_den;
p_flv->d_timebase = (double)p_param->i_timebase_num / p_param->i_timebase_den;
p_flv->b_vfr_input = p_param->b_vfr_input;
p_flv->i_delay_frames = p_param->i_bframe ? (p_param->i_bframe_pyramid ? 2 : 1) : 0;
return 0;
}
int write_RTMP_headers( hnd_t handle, RTMP *rtmp, x264_nal_t *p_nal )
{
rtmp_flv_hnd_t *p_flv = (rtmp_flv_hnd_t *)handle;
flv_buffer *c = p_flv->c;
int sps_size = p_nal[0].i_payload;
int pps_size = p_nal[1].i_payload;
int sei_size = p_nal[2].i_payload;
// SEI
/* It is within the spec to write this as-is but for
* mplayer/ffmpeg playback this is deferred until before the first frame */
p_flv->sei = malloc( sei_size );
if( !p_flv->sei )
return -1;
p_flv->sei_len = sei_size;
memcpy( p_flv->sei, p_nal[2].p_payload, sei_size );
// SPS
uint8_t *sps = p_nal[0].p_payload + 4;
flv_put_byte( c, FLV_TAG_TYPE_VIDEO );
flv_put_be24( c, 0 ); // rewrite later
flv_put_be24( c, 0 ); // timestamp
flv_put_byte( c, 0 ); // timestamp extended
flv_put_be24( c, 0 ); // StreamID - Always 0
p_flv->start = c->d_cur; // needed for overwriting length
flv_put_byte( c, 7 | FLV_FRAME_KEY ); // Frametype and CodecID
flv_put_byte( c, 0 ); // AVC sequence header
flv_put_be24( c, 0 ); // composition time
flv_put_byte( c, 1 ); // version
flv_put_byte( c, sps[1] ); // profile
flv_put_byte( c, sps[2] ); // profile
flv_put_byte( c, sps[3] ); // level
flv_put_byte( c, 0xff ); // 6 bits reserved (111111) + 2 bits nal size length - 1 (11)
flv_put_byte( c, 0xe1 ); // 3 bits reserved (111) + 5 bits number of sps (00001)
flv_put_be16( c, sps_size - 4 );
flv_append_data( c, sps, sps_size - 4 );
// PPS
flv_put_byte( c, 1 ); // number of pps
flv_put_be16( c, pps_size - 4 );
flv_append_data( c, p_nal[1].p_payload + 4, pps_size - 4 );
// rewrite data length info
unsigned length = c->d_cur - p_flv->start;
flv_rewrite_amf_be24( c, length, p_flv->start - 10 );
flv_put_be32( c, length + 11 ); // Last tag size
CHECK( flv_flush_RTMP_data( rtmp, c ) );
return sei_size + sps_size + pps_size;
}
int write_RTMP_frame( hnd_t handle, RTMP *rtmp, uint8_t *p_nalu, int i_size, x264_picture_t *p_picture )
{
rtmp_flv_hnd_t *p_flv = (rtmp_flv_hnd_t *)handle;
flv_buffer *c = p_flv->c;
#define convert_timebase_ms( timestamp, timebase ) (int64_t)((timestamp) * (timebase) * 1000 + 0.5)
if( !p_flv->i_framenum )
{
p_flv->i_delay_time = p_picture->i_dts * -1;
if( p_flv->i_delay_time )
fprintf(stderr, "initial delay %"PRId64" ms\n", p_picture->i_pts + p_flv->i_delay_time );
}
if (p_picture->i_dts < -p_flv->i_delay_time) {
fprintf(stderr,"Packets are not in the proper order with respect to DTS\n");
return -1;
}
int64_t dts;
int64_t cts;
int64_t offset;
int flags;
flags = 7;
flags |= p_picture->b_keyframe ? FLV_FRAME_KEY : FLV_FRAME_INTER;
dts = p_picture->i_dts + p_flv->i_delay_time;
cts = p_picture->i_pts + p_flv->i_delay_time;
offset = cts - dts;
if( p_flv->i_framenum )
{
if( p_flv->i_prev_dts == dts )
fprintf(stderr, "Duplicate DTS generated by rounding\n");
if( p_flv->i_prev_cts == cts )
fprintf(stderr, "Duplicate CTS generated by rounding\n");
}
p_flv->i_prev_dts = dts;
p_flv->i_prev_cts = cts;
// A new frame - write packet header
flv_put_byte( c, FLV_TAG_TYPE_VIDEO );
flv_put_be24( c, 0 ); // calculated later
flv_put_be24( c, dts );
flv_put_byte( c, (dts >> 24) & 0x7F);
flv_put_be24( c, 0 );
p_flv->start = c->d_cur;
flv_put_byte( c, flags );
flv_put_byte( c, 1 ); // AVC NALU
flv_put_be24( c, offset );
if( p_flv->sei )
{
flv_append_data( c, p_flv->sei, p_flv->sei_len );
free( p_flv->sei );
p_flv->sei = NULL;
}
flv_append_data( c, p_nalu, i_size );
unsigned length = c->d_cur - p_flv->start;
flv_rewrite_amf_be24( c, length, p_flv->start - 10 );
flv_put_be32( c, 11 + length ); // Last tag size
CHECK( flv_flush_RTMP_data( rtmp, c ) );
p_flv->i_framenum++;
return i_size;
}
void setup_shared_object(const char *shared_object, RTMP *rtmp) {
RTMPPacket packet;
char pbuffer[512], *pend = pbuffer + sizeof(pbuffer);
char *enc;
packet.m_nChannel = 0x03;
packet.m_headerType = RTMP_PACKET_SIZE_LARGE;
packet.m_packetType = RTMP_PACKET_TYPE_SHARED_OBJECT;
packet.m_nTimeStamp = 0;
packet.m_nInfoField2 = 0;
packet.m_hasAbsTimestamp = 0;
packet.m_body = pbuffer + RTMP_MAX_HEADER_SIZE;
enc = packet.m_body;
//SO name
size_t length = strlen(shared_object);
enc = AMF_EncodeInt16(enc, pend, length);
memcpy(enc, shared_object, length);
enc += length;
enc = AMF_EncodeInt32(enc, pend, 0); //version 0
enc = AMF_EncodeInt32(enc, pend, 0); //flag persistence 0 for temp, 2 for persistent
enc = AMF_EncodeInt32(enc, pend, 0); //four random bytes
*enc++ = 0x01; //event type - init/open
enc = AMF_EncodeInt32(enc, pend, 0); //data
packet.m_nBodySize = (int) (enc - packet.m_body);
RTMP_SendPacket(rtmp, &packet, TRUE);
}
void update_x_y_and_timestamp(const char *shared_object, RTMP *rtmp, uint16_t x, uint16_t y, uint64_t timestamp, int so_version) {
RTMPPacket packet;
char pbuffer[512], *pend = pbuffer + sizeof(pbuffer);
char *enc;
packet.m_nChannel = 0x03;
packet.m_headerType = RTMP_PACKET_SIZE_LARGE;
packet.m_packetType = RTMP_PACKET_TYPE_SHARED_OBJECT;
packet.m_nTimeStamp = (int) time(NULL);
packet.m_nInfoField2 = 0;
packet.m_hasAbsTimestamp = 1;
packet.m_body = pbuffer + RTMP_MAX_HEADER_SIZE;
enc = packet.m_body;
//SO name
size_t length = strlen(shared_object);
enc = AMF_EncodeInt16(enc, pend, length);
memcpy(enc, shared_object, length);
enc += length;
enc = AMF_EncodeInt32(enc, pend, so_version); //version 0
enc = AMF_EncodeInt32(enc, pend, 0); //flag persistence 0 for temp, 2 for persistent
enc = AMF_EncodeInt32(enc, pend, 0); //four random bytes
*enc++ = 0x03; //event type - update
AVal xName = AVC("x");
char *place = enc;
enc = AMF_EncodeInt32(enc, pend, 0); //length of data, set later
enc = AMF_EncodeNamedNumber(enc, pend, &xName, x);
int data_length = (int) (enc-place);
enc -= data_length;
AMF_EncodeInt32(enc, pend, data_length-4);
enc += data_length;
*enc++ = 0x03; //event type - update
AVal yName = AVC("y");
place = enc;
enc = AMF_EncodeInt32(enc, pend, 0); //length of data, set later
enc = AMF_EncodeNamedNumber(enc, pend, &yName, y);
data_length = (int) (enc-place);
enc -= data_length;
AMF_EncodeInt32(enc, pend, data_length-4);
enc += data_length;
*enc++ = 0x03; //event type - update
AVal tName = AVC("timeStamp");
place = enc;
enc = AMF_EncodeInt32(enc, pend, 0); //length of data, set later
enc = AMF_EncodeNamedNumber(enc, pend, &tName, timestamp);
data_length = (int) (enc-place);
enc -= data_length;
AMF_EncodeInt32(enc, pend, data_length-4);
enc += data_length;
packet.m_nBodySize = (int) (enc - packet.m_body);
RTMP_SendPacket(rtmp, &packet, TRUE);
}