static int write_headers( hnd_t handle, x264_nal_t *p_nal )
{
flv_hnd_t *p_flv = 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;
uint8_t *sps;
unsigned length;
// 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
sps = p_nal[0].p_payload + 4;
x264_put_byte( c, FLV_TAG_TYPE_VIDEO );
x264_put_be24( c, 0 ); // rewrite later
x264_put_be24( c, 0 ); // timestamp
x264_put_byte( c, 0 ); // timestamp extended
x264_put_be24( c, 0 ); // StreamID - Always 0
p_flv->start = c->d_cur; // needed for overwriting length
x264_put_byte( c, 7 | FLV_FRAME_KEY ); // Frametype and CodecID
x264_put_byte( c, 0 ); // AVC sequence header
x264_put_be24( c, 0 ); // composition time
x264_put_byte( c, 1 ); // version
x264_put_byte( c, sps[1] ); // profile
x264_put_byte( c, sps[2] ); // profile
x264_put_byte( c, sps[3] ); // level
x264_put_byte( c, 0xff ); // 6 bits reserved (111111) + 2 bits nal size length - 1 (11)
x264_put_byte( c, 0xe1 ); // 3 bits reserved (111) + 5 bits number of sps (00001)
x264_put_be16( c, sps_size - 4 );
flv_append_data( c, sps, sps_size - 4 );
// PPS
x264_put_byte( c, 1 ); // number of pps
x264_put_be16( c, pps_size - 4 );
flv_append_data( c, p_nal[1].p_payload + 4, pps_size - 4 );
// rewrite data length info
length = c->d_cur - p_flv->start;
rewrite_amf_be24( c, length, p_flv->start - 10 );
x264_put_be32( c, length + 11 ); // Last tag size
CHECK( flv_flush_data( c ) );
return sei_size + sps_size + pps_size;
}
static int set_param( hnd_t handle, x264_param_t *p_param )
{
flv_hnd_t *p_flv = handle;
flv_buffer *c = p_flv->c;
x264_put_byte( c, FLV_TAG_TYPE_META ); // Tag Type "script data"
int start = c->d_cur;
x264_put_be24( c, 0 ); // data length
x264_put_be24( c, 0 ); // timestamp
x264_put_be32( c, 0 ); // reserved
x264_put_byte( c, AMF_DATA_TYPE_STRING );
x264_put_amf_string( c, "onMetaData" );
x264_put_byte( c, AMF_DATA_TYPE_MIXEDARRAY );
x264_put_be32( c, 7 );
x264_put_amf_string( c, "width" );
x264_put_amf_double( c, p_param->i_width );
x264_put_amf_string( c, "height" );
x264_put_amf_double( c, p_param->i_height );
x264_put_amf_string( c, "framerate" );
if( !p_param->b_vfr_input )
x264_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;
x264_put_amf_double( c, 0 ); // written at end of encoding
}
x264_put_amf_string( c, "videocodecid" );
x264_put_amf_double( c, FLV_CODECID_H264 );
x264_put_amf_string( c, "duration" );
p_flv->i_duration_pos = c->d_cur + c->d_total + 1;
x264_put_amf_double( c, 0 ); // written at end of encoding
x264_put_amf_string( c, "filesize" );
p_flv->i_filesize_pos = c->d_cur + c->d_total + 1;
x264_put_amf_double( c, 0 ); // written at end of encoding
x264_put_amf_string( c, "videodatarate" );
p_flv->i_bitrate_pos = c->d_cur + c->d_total + 1;
x264_put_amf_double( c, 0 ); // written at end of encoding
x264_put_amf_string( c, "" );
x264_put_byte( c, AMF_END_OF_OBJECT );
unsigned length = c->d_cur - start;
rewrite_amf_be24( c, length - 10, start );
x264_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;
}
static int write_frame( hnd_t handle, uint8_t *p_nalu, int i_size, x264_picture_t *p_picture )
{
flv_hnd_t *p_flv = 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->b_dts_compress && p_flv->i_delay_time )
x264_cli_log( "flv", X264_LOG_INFO, "initial delay %"PRId64" ms\n",
convert_timebase_ms( p_picture->i_pts + p_flv->i_delay_time, p_flv->d_timebase ) );
}
int64_t dts;
int64_t cts;
int64_t offset;
if( p_flv->b_dts_compress )
{
if( p_flv->i_framenum == 1 )
p_flv->i_init_delta = convert_timebase_ms( p_picture->i_dts + p_flv->i_delay_time, p_flv->d_timebase );
dts = p_flv->i_framenum > p_flv->i_delay_frames
? convert_timebase_ms( p_picture->i_dts, p_flv->d_timebase )
: p_flv->i_framenum * p_flv->i_init_delta / (p_flv->i_delay_frames + 1);
cts = convert_timebase_ms( p_picture->i_pts, p_flv->d_timebase );
}
else
{
dts = convert_timebase_ms( p_picture->i_dts + p_flv->i_delay_time, p_flv->d_timebase );
cts = convert_timebase_ms( p_picture->i_pts + p_flv->i_delay_time, p_flv->d_timebase );
}
offset = cts - dts;
if( p_flv->i_framenum )
{
if( p_flv->i_prev_dts == dts )
x264_cli_log( "flv", X264_LOG_WARNING, "duplicate DTS %"PRId64" generated by rounding\n"
" decoding framerate cannot exceed 1000fps\n", dts );
if( p_flv->i_prev_cts == cts )
x264_cli_log( "flv", X264_LOG_WARNING, "duplicate CTS %"PRId64" generated by rounding\n"
" composition framerate cannot exceed 1000fps\n", cts );
}
p_flv->i_prev_dts = dts;
p_flv->i_prev_cts = cts;
// A new frame - write packet header
x264_put_byte( c, FLV_TAG_TYPE_VIDEO );
x264_put_be24( c, 0 ); // calculated later
x264_put_be24( c, dts );
x264_put_byte( c, dts >> 24 );
x264_put_be24( c, 0 );
p_flv->start = c->d_cur;
x264_put_byte( c, p_picture->b_keyframe ? FLV_FRAME_KEY : FLV_FRAME_INTER );
x264_put_byte( c, 1 ); // AVC NALU
x264_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;
rewrite_amf_be24( c, length, p_flv->start - 10 );
x264_put_be32( c, 11 + length ); // Last tag size
CHECK( flv_flush_data( c ) );
p_flv->i_framenum++;
return i_size;
}
static int write_frame( hnd_t handle, uint8_t *p_nalu, int i_size, x264_picture_t *p_picture )
{
flv_hnd_t *p_flv = handle;
flv_buffer *c = p_flv->c;
int64_t dts = (int64_t)( (p_picture->i_dts * 1000 * ((double)p_flv->i_timebase_num / p_flv->i_timebase_den)) + 0.5 );
int64_t cts = (int64_t)( (p_picture->i_pts * 1000 * ((double)p_flv->i_timebase_num / p_flv->i_timebase_den)) + 0.5 );
int64_t offset = cts - dts;
unsigned length;
if( p_flv->i_framenum )
{
int64_t prev_dts = (int64_t)( (p_flv->i_prev_dts * 1000 * ((double)p_flv->i_timebase_num / p_flv->i_timebase_den)) + 0.5 );
int64_t prev_cts = (int64_t)( (p_flv->i_prev_pts * 1000 * ((double)p_flv->i_timebase_num / p_flv->i_timebase_den)) + 0.5 );
if( prev_dts == dts )
{
double fps = ((double)p_flv->i_timebase_den / p_flv->i_timebase_num) / (p_picture->i_dts - p_flv->i_prev_dts);
#if _MSC_VER >= 1300
fprintf( stderr, "flv [warning]: duplicate DTS %"PRId64" generated by rounding\n"
" current internal decoding framerate: %.6f fps\n", dts, fps );
#else
fprintf( stderr, "flv [warning]: duplicate DTS %I64d generated by rounding\n"
" current internal decoding framerate: %.6f fps\n", dts, fps );
#endif
}
if( prev_cts == cts )
{
double fps = ((double)p_flv->i_timebase_den / p_flv->i_timebase_num) / (p_picture->i_pts - p_flv->i_prev_pts);
#if _MSC_VER >= 1300
fprintf( stderr, "flv [warning]: duplicate CTS %"PRId64" generated by rounding\n"
" current internal composition framerate: %.6f fps\n", cts, fps );
#else
fprintf( stderr, "flv [warning]: duplicate CTS %I64d generated by rounding\n"
" current internal composition framerate: %.6f fps\n", cts, fps );
#endif
}
}
p_flv->i_prev_dts = p_picture->i_dts;
p_flv->i_prev_pts = p_picture->i_pts;
// A new frame - write packet header
x264_put_byte( c, FLV_TAG_TYPE_VIDEO );
x264_put_be24( c, 0 ); // calculated later
x264_put_be24( c, dts );
x264_put_byte( c, dts >> 24 );
x264_put_be24( c, 0 );
p_flv->start = c->d_cur;
x264_put_byte( c, p_picture->b_keyframe ? FLV_FRAME_KEY : FLV_FRAME_INTER );
x264_put_byte( c, 1 ); // AVC NALU
x264_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 );
length = c->d_cur - p_flv->start;
rewrite_amf_be24( c, length, p_flv->start - 10 );
x264_put_be32( c, 11 + length ); // Last tag size
CHECK( flv_flush_data( c ) );
p_flv->i_framenum++;
return i_size;
}
