static int write_header( flv_buffer *c ) { x264_put_tag( c, "FLV" ); // Signature x264_put_byte( c, 1 ); // Version x264_put_byte( c, 1 ); // Video Only x264_put_be32( c, 9 ); // DataOffset x264_put_be32( c, 0 ); // PreviousTagSize0 return flv_flush_data( c ); }
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; }